www.process-heating.com | October 2011 | Volume 18, Number 10
Heat exchangers transfer heat from two flowing media, cooling or heating as the application demands. Find suppliers that can help you specify the exchanger you need in our Equipment Overview.
Periodical Class
14 3 Ways to Clean Your Hot Oil System 24 Fixing a Stinky Situation
These heaters will be fully assembled and checked at our factory before delivery.
Get a complete heater package Need a new heater? Get a complete heater package from Heatec. A complete package eliminates hassles, saves you time and saves you money. Our package includes design, manufacturing, factory assembly, on-site setup and startup. We also offer maintenance contracts and provide free phone support. Heaters have many components from a variety of manufacturers. It’s always best to mate these components with the heater and adjust them before the heater is shipped to you. This eliminates most compatibility problems. Our goal is that setup of our heater at your plant will be trouble free, without undue rework. Most setups should only require re-assembly of parts dismantled
for shipping, plus connection of electrical power and piping. Complete factory assembly eliminates last-minute fieldwork that can cause startup delays. It also eliminates buck passing if things don’t go right. Moreover, if a problem develops later, you won’t have to wrangle with a variety of component suppliers to fix it. So, when you buy a new heater, always choose a manufacturer that provides a complete package. Heatec has this capability, which sets us apart from others. Call today and let us answer any questions you have about our heater packages.
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October 2011 Volume 18 • Number 10
www.process-heating.com WEB EXCLUSIVES: READ MORE AT WWW.PROCESS-HEATING.COM Q What Causes Exothermic Heating?
page
page
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Heat Transfer Fluids Cleaning out your hot oil system is neither cheap nor easy. But often it is necessary. Here’s some information that will help you decide how to proceed.
Heat Exchangers Rectangular channeled heat exchangers can replace older technologies and relieve associated problems.
Oxidizers Fixing a Stinky Situation Single valve rotary, regenerative thermal oxidizers can help remove process odors in a cost effective manner when properly designed and installed.
Heaters Don’t Get All Fired Up Many particulate solid materials can exhibit self-heating that, if unchecked, is likely to affect the quality of the product (at the least) or, more dangerously, progress to the point of fire or explosion. Preventing self-heating of particulate solids is possible with safe drying operations.
Columns & Departments 6 8 13 29 29
Q Archives Q Calendar of Events Q Drying Files columns
Q Energy Notes column Q Equipment Overviews Q Heating Highlights
Q Digital Editions Q Buyers Guide Q Archived Webinars
Quick links on www.process-heating.com/connect point the way.
Q Go Mobile
Heat exchangers transfer heat from two flowing media, cooling or heating as the application demands. Find suppliers that can help you specify the exchanger you need in our Equipment Overview.
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Q Industry News
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Equipment Overview: Heat Exchangers Conduction Junction
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UPDATED DAILY Q New Products
NETWORK WITH PROCESS HEATING!
Exchange Your Exchanger
20
There are three main reasons why any hydrocarbon heat transfer fluid will break down or degrade. Rectangular heat recovery exchangers can help save heat and energy in diverse applications.
3 Ways to Clean Your Hot Oil System
17
Q The Big Three
Q Applications for Rectangular Channeled Heat Exchangers
Features 14
The exothermic onset temperature for self-heating is influenced by the chemical and physical properties.
Editor’s Page Inner Workings Calendar Product Take-Off Products
32 33 33 34
Classified Directory Subscription Card Advertiser Index Places & Faces
Use your smart phone to read Process Heating, wherever you are! Simply visit http://gettag.mobi/ with your phone’s browser to install the Microsoft Tag app. Then, point your phone’s camera at the tag below to be taken to our current issue online — instantly. The reader works on most current smart and advancedd ffeature phones, h includi l d ing Windows Mobile (5.5 and above), iPhone, Blackberry, Symbian and J2ME.
About the Cover Tasked with cooling a waste stream that contained ceramic fibers prior to its entrance at a baghouse, Munters Air Treatment (www.munters.us) provided a Thermo-T tubular air-to-air heat exchanger. The turn-key project meant Munters, Amesbury, Mass., provided everything, including the transition ducting, cooling fans, structural platforms, tube cleaning system and ladders. The equipment shipped in many pieces and was assembled in the field. A special soot blower system was provided on the project to clean the tube side (hot side) of the tubular heat exchanger. For more information on heat exchangers, turn to page 20.
PROCESS HEATING (ISSN 1077-5870) is published 12 times annually, monthly, by BNP Media, 2401 W. Big Beaver Rd., Suite 700, Troy, MI 48084-3333. Telephone: (248) 362-3700, Fax: (248) 362-0317. No charge for subscriptions to qualified individuals. Annual rate for subscriptions to nonqualified individuals in the U.S.A.: $115.00 USD. Annual rate for subscriptions to nonqualified individuals in Canada: $149.00 USD (includes GST & postage); all other countries: $165.00 (int’l mail) payable in U.S. funds. Printed in the U.S.A. Copyright 2011, by BNP Media. All rights reserved. The contents of this publication may not be reproduced in whole or in part without the consent of the publisher. The publisher is not responsible for product claims and representations. Periodicals Postage Paid at Troy, MI and at additional mailing offices. POSTMASTER: Send address changes to: PROCESS HEATING, P.O. Box 2146, Skokie, IL 60076. Canada Post: Publications Mail Agreement #40612608. GST account: 131263923. Send returns (Canada) to Pitney Bowes, P.O. Box 25542, London, ON, N6C 6B2. Change of address: Send old address label along with new address to PROCESS HEATING, P.O. Box 2146, Skokie, IL 60076. For single copies or back issues: contact Ann Kalb at (248) 244-6499 or
[email protected].
www.process-heating.com • O c t o b e r 2 0 1 1
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By Linda Becker
Commentary If You Handle Heating and Cooling, Check It Out
Ammonia Refrigeration Webinar Planned Operators in some industries such as food processing know better than others that heating is only half the equation. The other side, of course, is cooling, and in some applications, effective process cooling equipment is more essential than heating equipment. This is why we launched our supplement, Process Cooling, 10 years ago, and why I’m talking about an ammonia refrigeration webinar this month. You or others in your facility who use ammonia refrigeration systems know they play a crucial role in cooling processes and in facility cooling systems. Operators and engineers working with the toxic chemical must know how to operate and maintain their equipment for reliability and efficiency, all the while keeping an eye on safety. Fill in any knowledge gaps on November 3, at 2 p.m. ET, with a free one-hour tightly focused ammonia-safety webinar, “Handling Ammonia Systems Safely.” At the session, you will learn: • Ammonia first aid — both the old and new practices. • Why the published lower explosive limit may not be correct for your facility.
Two Coils
• Whether ammonia rises, hovers or falls during a release. (Maybe you think you know, but are you sure?) • The four most common misunderstandings about ammonia. • Why trapped liquid is so dangerous. • The application and misapplication of ammonia detectors. • What to do (and not do) during a release. The webinar presenter is John Sherrill, CIRO, RAI, the president and director of training at Midwest Ammonia Training Center LLC, Nashville, Ind. You will benefit from his more than 20 years experience as an instructor teaching ammonia safety and system operation to end-users of refrigeration systems. So if you use ammonia refrigeration systems, make plans to attend and learn about “gotchas” and other practical information that could save your life, your equipment or your facility.
Linda Becker, Associate Publisher and Editor,
[email protected]
are Better than One Designed with twin helical coils the General Combustion HYT Series heaters offer the highest efficiency available. The HYT is designed for high temperature applications and its small, compact package makes it the ideal choice for limited space environments and easy installation. The General Combustion HYT is suitable for use with a wide range of fuels and thermal fluids making it the most versatile and efficient heater available. For reliability you can trust and efficiency you can bank on... Call the experts at General Combustion.
HERE’S WHY . . . • • • • • • •
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Highest efficiency available Reduced operating costs Lower stack temperatures Compact construction for easy installation Safe, low-pressure operation No castable refractory Factory tested for optimum performance
O c t o b e r 2 0 1 1 • Process Heating
5201 N. Orange Blossom Trail, Orlando, FL 32810 • Phone (407)290-6000 • Fax (407) 578-0577
We know that
onedegree matters.
Chromalox Understands Every Facet of the Process Chromalox has the broadest selection of electric comfort heaters, heat trace cable and controls in the industry. Eliminate cold spots Prevent equipment freeze-ups Keep workers warm; increase productivity Prevent damage caused by ice and snow *OYVTHSV_LSLJ[YPJJVTMVY[OLH[LYZWYV]PKLLMÄJPLU[LJVUVTPJHSOLH[MVYJVTTLYJPHSHUKPUK\Z[YPHSHWWSPJH[PVUZ Chromalox products apply safe, clean, fast heat with heavy-duty construction that affords long, dependable service. Chromalox offers a full line of cables, accessories, and controls to suit many applications in the commercial construction THYRL[7PWLMYLLaLWYV[LJ[PVUMYLLaLWYV[LJ[PVUVMÄYLZWYPURSLYZ`Z[LTZYVVMHUKN\[[LYKLPJPUNLTILKKLKZUV^ TLS[PUNMYVZ[OLH]LWYL]LU[PVUOV[^H[LY[LTWLYH[\YLTHPU[LUHUJLHUKÅVVY^HYTPUNZ`Z[LTZHYLH]HPSHISLHUKWYV]PKL rugged, high quality system solutions. HEAT TRACE CABLE & CONTROLS COMFORT HEATERS
© 2011 Chromalox, Inc.
www.chromalox.com 1.800.443.2640
[email protected]
Inner Workings
Oxidizer Rebuild Delivers for Pulp and Paper Mill A southeastern U.S. pulp and paper mill needed to rebuild the regenerative thermal oxidizer (RTO) used for controlling emissions from its black liquor oxidation exhaust. The stripper off-gases and concentrated noncondensable gases were high concentration, highly corrosive streams. The mill wanted to complete the rebuild during a scheduled mill outage, which would require any oxidizer contractor to work around the clock to finish construction within the planned shutdown. After considering the options, the mill managers approached Nestec Inc., Douglassville, Pa., although the company was not the original equipment manufacturer. After initial meetings and site visits, Nestec recommended the mill remove and replace the existing combus-
Below: Removal of the combustion chamber, transition duct, media and media baskets was completed in the first three days. Right: The old ceramic media had broken down and needed replacing.
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O c t o b e r 2 0 1 1 • Process Heating
tion chamber, followed by the reinstallation of the top platform, burner, injection nozzles, piping and wiring. Furthermore, Nestec suggested the mill externally insulate and clad the combustion chamber. The insulation would maintain an elevated skin temperature on the combustion chamber, which would prevent condensation of corrosive materials on the skin, explained Kevin Nesbitt, national sales manager at Nestec. Nestec also recommended removing the existing media, fabricating new heat recovery baskets and adding new media. This would be followed by installing insulation on the lower section,
externally and internally. The mill would provide the labor, equipment and materials to build a sloped floor in the outlet of the oxidizer. The design, fabrication and installation of a new rotor wash system would be provided by the Nestec. According to Nestec, one major change made to the system was to replace the original water-quench nozzle with a cold-air quench to prevent overtemperature conditions in the combustion chamber. This change included designing a new purge-air fan system and integrating the valve’s control into the existing oxidizer controls. Nestec also proposed to design, provide and install a modified control system for the burner. Once the plans were in place and approved, all was in place to complete the job during the planned mill shutdown. Upon arrival at the mill, the Nestec team completed a walkthrough and safety review. As with any complex equipment rebuild project, the contractor was concerned about unseen conditions and damage requiring rapid adjustments in the field. Once initial concerns were addressed, work began in earnest. Removal of the combustion chamber, transition duct, media and media baskets was completed in the first three days. The new combustion chamber was fabricated from 0.25" thick, 253MA alloy steel with 310 stainless steel refractory anchors, constructed as two sections to be located above the heat-recovery chambers. The oxidation chamber was designed and constructed with a bolted and davited access door for routine inspection of the burner and internal insulation. Upon final installation, Nesbitt noted, the chamber’s flange connections were bolted and gasketed to ensure airtight construction. This effort was followed by the reinstallation of the top platform, burner, injection nozzles, piping and associated wiring. Nesbitt noted the project was completed successfully within in the scheduled downtime. During the complex process, the rebuild team continually worked diligently with vendors and fab-
Inner Workings
Heaters Failing? PHCo has a Solution
The combustion chamber required internal and external insulation.
ricators to maintain the scheduled completion date in spite of unexpected delays. As of August 2011, the rebuilt equipment has been operating efficiently and problem free for six months. To learn more about Nestec, call (610) 323-7670 or visit www.nestecinc.com.
Infrared Dries Powder-Coated Brake Pads By installing an infrared oven, Federal Mogul, Southfield, Mich., has eliminated a previous bottleneck in its brake pad coating process and quadrupled productivity. The oven, from Hereaus Noblelight, Duluth, Ga., cures the powder coating on a range of brake pads and increased the drying line’s output. The impact has been substantial with money saved and increased profit for the parts manu-
These tubular heaters are clearly NOT what you want. It often results in a total and costly shutdown since replacement is usually the only solution. Contrast that to PHCo’s low watt density drywell electric heater and there’s no comparison. Not only does is not damage material or cause build up, it is longer lasting and if there is an element failure, the internal heating element can be replaced without draining the system. So, if you need to keep material at specific temperatures and are looking for a new or replacement system, be sure to contact us. These patented ETL listed elements might just be your answer to the above question. After all, we’ve been manufacturing them since 1947 with incredible success.
PROCESS HEATING COMPANY P.O. Box 84585 Seattle, Washington 98124-5885 Ph: 206/682-3414 • Fax: 206/682-1582 www.processheating.com email:
[email protected]
Since 1947
PH10114ProHeatCo.indd 1
SYSTEM DOWN!
9/22/11 9:58 AM
MultiTherm’s Heat Transfer Fluids Keep All Systems
GO! Run your system more efficiently, for longer periods, with less down time. Make System Maintenance a Priority!
1-800-339-7549 www.multitherm.com www.process-heating.com • O c t o b e r 2 0 1 1
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Inner Workings Custom Designed Air Pollution Control Systems Regenerative Thermal Oxidizers (RTO’s) Catalytic & Thermal Recuperative Oxidizers x Industrial Web Dryers & Ovens x x
Competitive equipment pricing with worldwide turnkey installation available Oxidizers offer guaranteed destruction efficiencies of up to 99.5% Thermal energy recovery (TER) of up to 97% can be achieved with RTO’s Emergency repair, PM inspections, & spare parts 2071-C Lawrence Drive, P.O. Box 5903, De Pere, WI 54115-5903 Phone 920-336-9800 Fax 920-336-9797 Email:
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NEW FULL FEATURE
COMBUSTION SAFEGUARD FORM 6642FF
Monitor and control burners in new, replacement or retrofit applications. Designed to reach new levels of operating control and safety. Full Feature Combustion Safeguard including: r 3FMBZDPOUBDUTGPSIJHIàSFMPXàSFDPOUSPM r 1SPPGPG$MPTVSF r 1SPPGPG)JHI'JSF1VSHF r 1VSHF5JNJOH r 1SPPGPG-PX'JSF4UBSU r *HOJUJPO5SJBM5JNJOH r 1JMPU*OUFSSVQU5JNJOH r "MBSNPVUQVU r &JHIU4UBUVT-JHIUT r 0QFSBUFTXJUI'MBNF3PEBOEPS Ultra-Violet Scanner r " WBJMBCMFJO/&."FODMPTVSFXJUI WJFXJOHXJOEPXBOEJMMVNJOBUFE1PXFS 0GG0O3FTFUTXJUDI 'PSPWFSZFBST XFIBWFQSPWJEFE&MFDUSJDBM4BGFUZ &RVJQNFOUGPS*OEVTUSZ'PSDPNQMFUFJOGP DPOUBDUVTBU FNBJM!QSPUFDUJPODPOUSPMTJODDPNPSWJTJUPVSXFCTJUF BUXXXQSPUFDUJPODPOUSPMTJODDPN
7317 N. LAWNDALE AVE. r P.O. BOX 287 r SKOKIE, IL 60076-0287 (847) 674-7676 r CHICAGO: (773) 763-3110 r FAX: (847) 674-7009
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facturer of brake pads, shoes and linings. An important stage in the auto-parts manufacturer’s brakepad production is the application of an anti-corrosion black epoxy coating that provides protection against water damage during vehicle operation. The epoxy must be cured, but when growing sales demanded production increases, Federal Mogul’s curing operation could no longer keep pace with the coating application. The process needed an improved powder coating curing technology to eliminate the bottleneck. The company decided that infrared offered the best solution because the curing process required that any heat applied would only be at the product surface and not within the material. In addition, a new curing system had to be fitted within limited existing space on the production line. The oven’s small footprint reinforced the company’s decision to use infrared. Infrared is well suited to the curing of powder coatings and acts in two stages. The preheat stage brings the powder to melt-and-flow temperature, and the coated component then is held at temperature to allow curing to take place. Heraeus carried out tests to establish how best to meet the process requirements, and medium-wave infrared was found best suited to this application. As a result of the testing, Hereaus installed a 162 kW infrared oven fitted with multiple fastresponse medium-wave emitters, a honeycomb wire-belt conveyor and a control panel for both emitters and conveyor. The system is divided into two zones to provide the melt and cure. With a control panel and a potentiometer, the power and dwell within the oven can be varied to provide a curing profile suitable to a range of pads. Features include: • The infrared oven has 162 kW total power via 30 fastresponse medium-wave emitters. • It provides 78 kW/m2 over the first ~4' (1.2 m) of the oven’s length. • It provides 51 kW/m2 over the final ~2.5' (0.8 m) of the oven’s length. • It includes a control panel with five selector switches, each controlling six emitters to allow setting to zero, and either 50 or 100 percent power as required. • It includes a potentiometer for speed control of the conveyor between ~1.6 to 6.6 ft/min (0.5 and 2.0 m/min). To read additional Heraeus Noblelight case histories on how infrared heating can be used, go to www.noblelight.net.
Hard-Drive Maker Buys New Emissions System Pro-Environmental Inc., Rancho Cucamonga, Calif., was awarded a contract from a major electronics company in San Jose, Calif., to supply a fluidized bed concentrator that will handle emissions from a hard-drive manufacturing process. The system will collect air emissions from multiple sources with relatively low concentrations of volatile organic compounds (VOCs). The equipment will provide lower operating costs due to its relatively small footprint requirement. The concentrator will replace an existing fixed-bed carbon system, which will
Inner Workings be kept in standby mode when the new system is commissioned. For more information about fluidized bed concentrators from the company, go to www.pro-env.com.
Using Water, Not Air for Spray Drying Simulations Working hand-in-hand with the Technical University of Denmark in Lyngby, Denmark, GEA Niro is simulating the fluid dynamics that take place within a full-sized spray dryer. The simulation relies on a scaled-down model with water instead of air. The process allows experiments to be performed at a laboratory level that otherwise would require full-scale equipment of several feet in all dimensions. The data gathered helps GEA Niro, headquartered in Soeborg, Denmark, to refine the development of its spray drying equipment and ensures that its technology keeps pace with, and sometimes drives, its customers’ production needs. The laboratory equipment is financed by GEA Niro. Inside the scaleddown, clear polycarbonate spray dryer, swirling water contains thousands of microscopic particles that go “live” by two green flashes from a laser. Meanwhile, a powerful computer indicates particle speed and direction of flow visually, displaying an image full of arrows in different shapes and sizes. “We let the water run through the container and then create vertically aligned laser light,” says Knud Erik Meyer, associate professor of mechanics at the university. “We shoot twice in a row and record each laser pulse. As the particles in the water move from the first to the second picture, we can see how fast and in which direction the particles move.” Thorvald Ullum, GEA Niro’s fluid mechanics manager, has been working on the development of spray dryers primarily used for powder production in food, chemicals and pharmaceuticals for many years. “This research collaboration makes it possible for GEA Niro to optimize our systems to be as compact and energy efficient as possible,” he says. “At the same time, it makes it possible
to improve the drying process, allowing the systems to produce better products by controlling the temperature of the particles during the drying process. “We can now make computer simulations of the spray drying process very accurately,” Ullum says. “By using CFD [computational fluid dynamics], we can
predict how the air moves and thereby how the particles dry. It is essential to know how close the simulations are to reality. How much can we trust our computer simulations? In truth the simulations are only part of the evaluation process. Although the simulation results are very accurate, every assumption has
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The solution behind the solution.
www.process-heating.com • O c t o b e r 2 0 1 1
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Inner Workings to be tested and validated on production equipment.” Using water rather than air allows the experiments to be performed on a smaller scale. Turbulence is a known problem in fluid dynamics and has to be taken into account when performing CFD calculations. Turbulence makes the flow pattern complicated, and it would take too much computing power to predict the flow accurately without some simplifications. Therefore, the system uses commercially available turbulence models, and different models are used depending on the flow conditions. The aim is to get as complete a picture as possible of the turbulent flow pattern in a spray dryer for as many different case scenarios as GEA Niro finds relevant. The recorded experimental flow patterns then are compared with theoretical flow patterns from computer simulations. The results from the experiments will help the university researchers choose the right turbulence model for their simulations to further refine the drying processes in newly developed spray dryers. For more information about GEA Niro, go to www.niro.com.
Online Tools, Mobile App Simplify Connections at Chem Show Chem Show Online is the name of a new suite of digital tools designed to help chemical processing industry professionals maximize their experience with the 2011 Chem Show, which will be held at the Jacob K. Javits Convention Center in New York City, November 1-3. By clicking on one of five icons, visitors to the show’s website can: • Search for exhibitors by name or alphabetically to see where they are located on the show floor, to get contact information or to link to their websites. • Search products by category, subcategory or by company name. • Access an interactive floor plan that identifies exhibitors’ booths when scrolled over and provides contact information and web links. • Research featured exhibitors and link to their websites or view videos they post. • Create a customized show planner. This tool allows all registered attendees to create a personal roadmap. Visitors can make appointments with exhibitors, add events to a calendar, save exhibitors’ contact names, keep track of educational session times and locations, and connect with people before, during and after the event. The 2011 Chem Show will also include a mobile app version of Chem Show Online. The smart phone application is a free link that will allow attendees to use the same features as the regular online version. To learn more about the Chem Show, visit www.chemshow.com. 12
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Calendar of Events October 15-19 — Weftec: The Water Quality Event, Los Angeles Convention Center, Los Angeles. Hosted by Water Environment Federation (WEF). Call (800) 666-0206 or visit www.weftec.org. 17-20 — American Filtration and Separations Society (AFS) Fall Conference, Hilton Houston Westchase, Houston. Call (612) 861-1277 or visit www.afssociety.org. 17-20 — Canadian Manufacturing Technology Show, Direct Energy Center, Toronto. Hosted by Society of Manufacturing Engineers. Call (800) 733-4763 or visit www.cmts.ca. 18-19 — Manufacturing with Composites, Omni Forth Worth Hotel, Fort Worth, Texas. Hosted by Society of Manufacturing Engineers. Call (800) 733-4763 or visit www.sme.org/ mfgcomposites.
Duke Energy Convention Center, Cincinnati. Call (800) 336-5152 or visit www.asminternational.org.
3 — Handling Ammonia Systems Safely Webinar. Hosted by Process Cooling magazine. Register at webinar.process-cooling.com.
November 1-3 — Chem Show - Chemical Processes Industries (CPI) Show, New York. Call (203) 221-9232 or visit www.chemshow.com.
14-17 — Fabtech, McCormick Place, Chicago. Hosted by Society of Manufacturing Engineers. Call (800) 7334763 or visit www.fabtechexpo.com.
MAXIMIZE PRODUCTIVITY AND REDUCE DOWNTIME T’S
FLASHPOIN UP TO
º 615 F
18-20 — Ipsen-U Vacuum Furnace Technical Training, Rockford, Ill. Call (815) 332-2518 or visit www.ipsenusa.com. 20-21 — Interphex Puerto Rico, Puerto Rico Convention Center, San Juan. Hosted by International Society for Pharmaceutical Engineering (ISPE). Call (888) 334-8704 or visit www.interphexpuertorico.com. 21 — Process Heating Systems Management Workshop, Dayton, Ohio. Call (937) 216-9452 or visit www.eere.energy.gov/industry. 24-27 — Air Quality VIII: An International Conference on Carbon Management, Mercury, Trace Elements, SOX, NOX and Particulate Matter, Gateway Marriott, Arlington, Va. Call (701) 777-5174 or visit www.undeerc.org/AQ8. 30-November 2 — ASTM Committee C16 on Thermal Insulation Meeting, Marriott Waterside, Tampa. Call (610) 832-9729 or visit www.astm.org.
Duratherm Heat Transfer Fluids combine precise temperature control with advanced formulations for long-term, trouble-free operation HEAT TRANSFER FLUIDS • Longer, cleaner running service. • 11 fluids operating from -120°F to 650°F. • Designed to meet equipment manufacturer (OEM) and customer specifications. • 100% compatible replacement and custom fluids available.
SYSTEM CLEANERS • Industries first and only system cleaners able to run production while cleaning. • Preventative maintenance to emergency downed system revivers. • System cleaners to fit every application and production schedule. • Avoids costly downtime.
Duratherm’s Enhanced Fluid (after use)
Typical Heat Transfer Oil (after use)
31-November 2 — ASM Heat Treating Society Conference and Exposition, www.process-heating.com • O c t o b e r 2 0 1 1
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Heat Transfer Fluids
3 Ways to Clean Your Hot Oil System Cleaning out your hot oil system is neither cheap nor easy. But often it is necessary. Here’s some information that will help you decide how to proceed.
H
ow do you know when you need to clean out your hot oil system, and what things should you keep in mind as you do it? This article describes:
• Pump and seals. • Disposal. • What you should expect when you are finished.
• The signs that you need to clean out your system. • What causes heat transfer fluids to break down. • Several clean out procedure options. • Manpower and length of time required to perform the clean out.
Let’s get started. The obvious indication that your fluid has degraded to the point that you need to clean out your system is that it cannot maintain the operating temperature of the process. This is evidenced when you find yourself dialing up the temperature on the heater, and you may notice that the flow rates have dropped off as well. All these are indicators that the fluid has degraded to the point that it is starting to sludge up the system and possibly coating the internal components. This coating can act as an insulator to keep the heat away from the oil in the heater as well as keep the heat in the oil at that process. Whether the heat transfer fluid has begun to degrade due to oxidation, thermal cracking or contamination, it will need to be cleaned out. However, there are enough differences with each system and situation to make a single detailed clean out procedure impractical or even incorrect for some cases. Instead, several general options are presented. Talk with a thermal fluid specialist to determine which option is best for you.
By Mark Smith, MultiTherm
with a 1 Flush Flushing Fluid
Procedure suggested for use when: • • • •
In many cases, fouling or corrosion of the expansion tank are the first signs that a problem exists if routine fluid analyses have not been performed. 14
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O c t o b e r 2 0 1 1 • Process Heating
System is not badly fouled. Fluids are chemically compatible. System is not difficult to completely drain. Time is short.
To begin, if possible, filter the existing fluid. Then, run the system at 225 to 250°F (108 to 122°C) — or just below the flashpoint — to mix well and suspend all the loose particulate in the thermal fluid. Stop the heater and, with the circu-
Heat Transfer Fluids • System has particulate and loosely adhering carbonaceous deposits. • System is badly sludged up or flow is restricted in some areas. • Treating a large system, where a full charge of flushing fluid is not acceptable. Check Valve Before Flushing
Check Valve After Flushing
Contaminants can catalyze fluid degradation and also result in severe operating and equipment problems.
lating pump going, allow the temperature to drop. Once the system has reached an acceptable temperature, stop the system pump and quickly drain the thermal fluid from all low points. Please note, personnel should exercise appropriate caution when working around hot fluid — remember, safety comes first. The benefit of hot draining is that it prevents sludge and tars from re-depositing in the system. Next, recharge the system 100 percent. Flushing the fluid from all of the low point drains helps prevent air pockets from developing. Start the pump (circulation) without heat to help remove any air pockets. You will hear them working their way into the expansion tank. When all of the air pockets are removed, apply heat. Circulate the flushing fluid for the manufacturer’s recommended time at temperatures above 200°F (94°C) or at
operating temperature. Then, reduce the heater outlet temperature to 225°F (108°C) at end of the circulating time before draining out the fluid to ensure smooth removal of all fluid and particulates gathered with the flushing fluid. Turn off the heater and allow the temperature to drop while keeping the circulating pump on. When at an acceptable temperature, stop the system pump and drain quickly. Recharge the system with new heat transfer fluid and restart. Take a fluid sample within one week of startup and send it to your heat transfer fluid supplier for analysis.
with a Process 2 Flush System Cleaner Procedure suggested for use when:
• Fluids are not compatible and are different types.
If the system fluid has been severely degraded, filtering the fluid is recommended to remove as much particulate as possible before draining the system.
To use a system cleaner, follow the general procedure used for the flushing, but add anywhere between 4 percent and 20 percent process system cleaner — depending on how badly degraded the system fluid is — to the existing fluid. Add the process system cleaner by using a secondary pump on the suction side of the main system pump — do not add in through the expansion tank. Circulate the cleaner for 48 hours at operating temperature. Then, reduce the heater outlet temperature to 225°F (108°C) at end of time before draining out. Reducing the temperature before draining helps to ensure smooth removal of all fluid and particulates. If the system fluid has been severely degraded, filtering the fluid is recommended to remove as much particulate as possible before draining the system. Once the system is drained, recharge with new heat transfer fluid and restart. As with any recharge, take a fluid sample within one week of startup and send it to your heat transfer fluid supplier for analysis.
3 Professional Cleaning
If you do not have the manpower or equipment, or if you have special clean out requirements, there are companies that can perform thermal fluid system cleaning. They will clean out your system using the procedures already outlined and can meet any specific requirements. In addition, if your system requires a chemical clean out, there are companies that provide this type of specific experience. In a typical procedure, the following cleaners may be used: • Water-borne cleaner, frequently based on inhibited phosphoric acid or sodium hydroxide with surfactants. • Solvents and/or chelates. • Sodium hydroxide with potassium permanganate. www.process-heating.com • O c t o b e r 2 0 1 1
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Oxidizers Ovens Furnaces The benefit of hot draining is that it prevents sludge and tars from re-depositing in the system. If the system fluid has been severely degraded, consider filtering the fluid before draining to remove as much particulate as possible.
¾ Oxidizers RTO Recuperative Catalytic Ovens & ¾ Furnaces Conveyorized Low Temp. & High Temp. Batch
936-273-3300
[email protected] www.epconlp.com 16
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O c t o b e r 2 0 1 1 • Process Heating
Caustic cleaners are hard on copper, aluminum and other alloys and should be used with caution. Chlorinated solvents such as 1, 1, 1, trichloroethane or perchloroethylene should not be used due to the potential for environmental damage or system damage from residual solvent. Once the system is chemically cleaned, flush it with plenty of water. (Of course, it is very important that all water be removed with a dry-out procedure or air prior to startup.) Perform a final rinse, which may contain inorganic rust inhibitor, and drain the system hot. Then dry out the system completely with heated nitrogen gas or air, as a second choice, to a -20°F (-29°C) dewpoint with the help of vacuum.
Other Factors When performing a clean out, keep in mind that time, pumps and seals, and disposal also must be considered. A common mistake is to try to squeeze a clean out into a weekend with a Monday morning production startup. This is practical only for small, non-complicated systems. Considerable time at temperature is required for cleaning. Good flushing is not done quickly. Also, pumps and seals must be considered. For flushing fluid and system cleaner options, be sure the cleaning fluids are compatible with the system components. When using the chemical clean out procedure, the pump and seals on heat transfer fluid systems are made for organic heat transfer fluids and will probably not be satisfactory for water-borne cleaners. An auxiliary pump will probably be required. Remember, uncontaminated organic heat transfer fluids can be taken by a waste oil hauler (oil recycler) and disposed of like used motor oil. If your system is thousands of gallons, most waste oil haul-
ers will offer to remove the oil from the system and pay you a small amount per gallon. If your fluid is classified as hazardous waste, contaminated fluid must be handled according to the contaminant type. Local and federal regulations must be consulted and followed. When you have selected the correct procedure and reviewed it with your hot oil supplier, you should expect to see your system clean and free of any soft sludge buildup. What you cannot expect is that, when using flushing fluid or system cleaner, any of the solid or hardened buildup will be removed. Chemical cleaning will remove the hardened buildup but also will remove any carbon molecules that has plugged a pin hole leak you might have had from the pipe rusting or breaking down from the outside in. If this happens, you can expect to see your new heat transfer fluid seeping out these holes when you recharge your system. Given all of these considerations, and how essential thermal fluid heating systems are to their facilities, the best idea is to contact your current fluid provider to help chose the right procedure. PH Mark Smith is sales manager with MultiTherm, Devault, Pa. For more information about MultiTherm heat transfer fluids, call (610) 4088361 or visit www.multitherm.com.
WEB EXCLUSIVE The Big Three There are three main reasons why any hydrocarbon heat transfer fluid will break down or degrade. READ MORE @ WWW.PROCESS-HEATING.COM
Heat Exchangers
Heat Exchangers
Exchange Your
Exchanger Rectangular channeled heat exchangers can replace older technologies and relieve associated problems. By Erwin Schwartz, DDI Heat Exchangers Inc.
H
eat exchangers have been used in wastewater treatment plants for many years, usually in applications with hot water on one side — from boilers that use bio-gas recovered energy, if possible — and mixed digested recirculating sludge from the digester on the other side. The basic principal in this application is to heat the sludge to the desired 95°F (35°C) for mesophilic process (Class B bio-solids) or to the preferred 135°F (57°C) for thermophilic process (safer Class A bio-solids, according to new regulations). In the past, older equipment and technology were used to flow the cold raw sludge, which enters the wastewater treatment plant
directly into the digester, where it was mixed with treated and already digested sludge. However, this process of digestion actually requires long retention times inside the digester for the mixed sludge. Plus, it lowers the temperature inside the digester, which is not a desired outcome. In addition, there were other disadvantages associated with technologies such as spiral and tube-in-tube. For instance, spiral technology, which is well known and commonly used in wastewater treatment plants, cannot have more than a 1" gap. Yet normally in this application, a 3" gap is required to avoid or limit plugging. The 1" gap limit creates the need to send the cold raw sludge, which is at about 5 to 7 percent solids and very viscous (40 cPs), into the digester to mix it with the already digested sludge to reduce its viscosity and
allow the mixed, recirculated sludge to flow in the spiral heat exchangers. The spiral heat exchanger also has pins on one side. That limits the use of that technology even further by allowing only water to flow in the side with the pins. Spiral exchangers cannot have cold raw sludge in them and definitely cannot have sludge in both sides. Tube-in-tube technology can have sludge flowing only in the inner central tube, where a 3" gap could be achieved. While this is promising, if sludge were to flow into the outer tube, the outer pipe would require a 9" dia. When the application requires sludge in both sides of the heat exchanger (to have sludge-to-sludge heat recovery), then the tube-in-tube arrangement will cause the flow in the outer pipe to be slow, which will result in baking and plugging. Therefore, a design engineer would want to have at least 3 ft/sec fast flow to limit or avoid baking to the surface due to the difference in the temperatures of the two liquids. This technology cannot have sludge in both sides of the heat exchanger. www.process-heating.com • O c t o b e r 2 0 1 1
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Heat Exchangers Narrow design heat exchangers allow them to be installed in small footprints.
An alternative to these approaches incorporates these three components: • Utilize direct, sludge-to-sludge heat recovery. It requires less bio-gas, natural gas or electricity, which could be used for other heating purposes. Alternately, the processor can reduce the overall usage and lower utility costs. • Preheat the cold raw sludge with the hot water. This will preheat the cold raw sludge to a temperature in between
the cold raw temperature of about 60°F (15°C) and the desired temperatures of 95 or 135°F (35 or 52°C). Inserting preheated sludge into the digester will improve the digester’s process and lower the liquid temperature inside the digester. • Boost efficiency by lowering the carbon emissions via direct sludge heat recovery from the wasted digested hot sludge. If this component is not included in the solution, it is simply wasting energy. A small heat recovery exchanger (500,000 to 1 million BTU/hr) can reduce the CO2 pollution by 29,215 tons in a year, or the equivalent of removing more than 19,000 cars from the roads. When designing a system to satisfy the specified criteria, there are 10 requirements that the design engineer must comply with to lower or eliminate the risk of plugging, baking or ending up with holes in the channels.
1 Maintain Gaps
There should be 3" gaps at a minimum so sludge blockage does not occur due to the height of the channel. The system must be designed for the optimum height for each liquid.
2 Avoid Baking
To avoid baking and achieve the fastest flow, the system must be designed for optimum width. This means a minimum of 3 ft/sec is required.
3 Eliminate Blocking
A non-block design — without spacers or obstacles — in the flow in both sides of the heat exchanger for both liquids also is necessary.
4 Think Turbulence
More turbulent flow than is possible with tube-in-tube or spiral technologies is required for better heat transfer due to the zigzag channels and side bends design.
WE KNOW ELECTRICITY Questions about SCR power control systems? We can help. • Fusing • Cooling • Heatsink Design • Voltage protection • Application assistance For more than 40 years we have been designing and building SCR controls for hundreds of thousands of users like you.
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[email protected] • www.payneng.com 18
O c t o b e r 2 0 1 1 • Process Heating | PH06074Payne01Blue.indd 1
5/21/07 9:53:59 AM
Heat Exchangers WEB EXCLUSIVE Applications for Rectangular Channeled Heat Exchangers Rectangular heat recovery exchangers can help save heat and energy in diverse applications. READ MORE @ WWW.PROCESS-HEATING.COM
5 Save Space
A more efficient solution will have a smaller footprint than tube technologies so less area is required. Also, a modular system can be used for water-to-sludge or sludge-to-sludge heat recovery. Backup units of water-to-sludge, while not in use, could be used for sludge-to-sludge heat recovery.
6
But Maximize Space Too
It will have a larger circumference than tube-in-tube technologies, which translates into a larger heat transfer surface with the same flow area.
7 Eliminate Ancillaries
Direct sludge-to-sludge systems do not require a macerator and blades to grind sludge, which can result in capital investment and ongoing maintenance sav-
The heat exchangers are used in sludge-to-sludge heat recovery recovery as well as hot water-to-sludge and cold water-to-sludge applications.
ings. In addition, the heat recovery on a more efficient system can provide payback within one year.
8 Provide Access
Individual doors should be designed in to provide full access to the internals. Davit arms allow the doors to swing easily.
9 Think Safety
As safety measures the system should include: • A design calculation that uses realistic viscosities, usually in the range of 2 to 40 cPs. • Plate thickness of a minimum 0.25" and allowance for corrosion and abrasions. • Heat exchangers that are tested and proven.
Maintenance 10 Simplify Demands
Little maintenance should be required. Many older technologies require weekly cleaning and service. Technology that embraces these 10 components does exist in the form of rectangular channeled heat exchangers, which can utilize direct sludge-to-sludge heat recovery without plugging or baking and with low maintenance. PH
This heat exchanger with a split arrangement was used for molasses.
Erwin Schwartz is the president of DDI Heat Exchangers Inc., which has locations in Montreal, and Hollywood, Fla. For more information, call (514) 696-7961 or visit www.ddi-heatexchangers.com. www.process-heating.com • O c t o b e r 2 0 1 1
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19
Equipment Overview
Heat Exchangers
When selecting the type of heat exchanger to use, construction materials, heat transfer medium, flow arrangement and heat transfer method are all factors to consider
— making the selection process a difficult job. But, Process Heating has something to help you out: Our Equipment Overview on Heat Exchangers will allow you find
You also can conduct your supplier search online! www.process-heating.com Click on Equipment Overview, then on heat exchangers.
Companies APV, An SPX Brand www.apv.com
Chromalox www.chromalox.com
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Epcon Industrial Systems LP www.epconlp.com
Multitherm www.multitherm.com
Super Radiator Coils www.srcoils.com
Tek-Temp Instruments Inc. www.tek-tempinstruments.com Advanced Heat Recovery, of Aqua Innovations Inc. Advanced Industrial Components Adwest Technologies Inc. AEC Inc. Aerofin AGC Heat Transfer Inc. Alfa Laval Inc. Ametek Fluoropolymer Products Anguil Environmental Systems Inc. API Heat Transfer Bell & Gossett/ITT Cataract Steel Industries Chart Industries Inc. Chemineer/Kenics-Greerco Chester-Jensen Colmac Coil Mfg. Inc. DDI Heat Exchangers Inc. Dedert Corp. DME Co. Doucette Industries Inc. DRS Marlo Coil Ellett Industries Ltd. Exergy LLC Exothermics Inc. Feldmeier Equipment Inc. Fulton Engineered Specialties Inc. GEA PHE Systems North America Georg Fisher GF Piping Systems Gooch Thermal Systems Inc. Graham Corp. H.C. Starck Inc. Harbridge Systems Heat and Control Inc. Heat Transfer Systems Inc. Heresite Protective Coatings LLC Isotherm Inc. ITT Standard JFD Tube & Coil Products JLS International Komline-Sanderson Luvata Grenada LLC Lytron Inc. Manning & Lewis Engineering Co. Mascoat Mersen (formerly Astro Cosmos/Carbone Lorraine/COA) Metso Minerals Industries Inc. MicroThermics Inc. Mokon Munters Corp. National Heat Exchange Patterson Industries (Canada) Ltd. Paul Mueller Co. Plate Concepts Inc.
FLOW ARRANGEMENT
MATERIALS OF CONSTRUCTION
Extended Surface, Plate-Fin Extended Surface, Tube-Fin Plate, Brazed Plate, Gasketed Plate, Lamella Plate, Spiral Plate, Welded Tubular, Double-Pipe Tubular, Shell and Tube, Plate Baffle Tubular, Shell and Tube, Rod Baffle Tubular, Spiral Tube Other Aluminum Brass Carbon Steel Ceramic Copper Exotic Metals Fluoropolymers Glass Graphite Nickel Stainless Steel Titanium Other Multi-Pass, Cross Counterflow Multi-Pass, Cross Parallel Flow Multi-Pass, Divided Flow Multi-Pass, Parallel Counterflow Multi-Pass, Parallel Plate Multi-Pass
CONSTRUCTION
a few potential suppliers that can provide just what you need. You also can conduct your search online at www.process-heating.com. The online ver-
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Manufacturers listed in this Equipment Overview responded to a special mailing by Process Heating and do not necessarily represent the entire heat exchanger market. For contact information or to be included in future listings, contact Linda Becker at (847) 405-4020; fax (248) 502-1001; e-mail
[email protected]. Companies with in front of their names have an advertisement in this issue.
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METHOD OF HEAT TRANSFER
MANUFACTURING PROCESS
INDUSTRIES SERVED
Multi-Pass, Split Flow Single Pass, Counterflow Single Pass, Crossflow Single Pass, Parallel Flow Air Gas Glycol Heat Transfer Fluid Oil Refrigerant Steam Water Other Air to Air Air to Liquid Gas to Air Gas to Liquid Liquid to Liquid Steam to Air Steam to Liquid Other Cooling Distillation Evaporation/Condensation Feed Preheater Fibrous Effluent Heat Recovery Heat Transfer Interchanger Pasteurization Reactor Slurry Reboiler Vapor Recovery Other Chemicals/Petrochemicals Electronics Ethanol/Biodiesel Fuels Finishing Food Packaging/Printing Pulp/Paper/Converting Pharmaceutical Plastics/Rubber/Vinyl
MEDIUM PROCESSED
manufacturers listed in our Equipment Overview, Process Heating can help. Visit www.process-heating.com/buyersguide for the most up-to-date details.
AFTERMARKET COVERAGE
hyperlinks will take you directly to some manufacturers’ web sites. If you would like a list of contact information for all heat exchanger
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Do you manufacture and market replacement/ aftermarket parts for your heat exchangers?
sion of our Equipment Overview on Heat Exchangers includes advanced searching capabilities: You set the criteria and let the search engine work for you. In addition,
Yes Yes * Yes Yes Yes Yes * Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes * Yes Yes Yes Yes * * * Yes Yes Yes Yes Yes * Yes * Yes Yes * Yes Yes Yes * Yes Yes Yes Yes Yes Yes Yes Yes Yes
www.process-heating.com • O c t o b e r 2 0 1 1
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21
Equipment Overview
Heat Exchangers
You also can conduct your supplier search online! www.process-heating.com Click on Equipment Overview, then on heat exchangers.
Companies Polytetra GmbH PRE-Heat Inc. Process Technology RAE Coils Div., RAE Corp. Rubicon Industries Seattle Boiler Works SEC Heat Exchangers Sentry Equipment Corp. SGL Carbon Technic LLC Smithco Engineering Solex Thermal Science Inc. Sterling Inc., Sterlco Struthers Wells, TEi/Babcock Power Swep North America Inc. Thermal Transfer Systems Inc. Thermax Inc. Tranter Inc. Trent Inc. Vilter Manufacturing LLC Waukesha Cherry-Burrell, An SPX Brand Xchanger Inc. Yula Corp.
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O c t o b e r 2 0 1 1 • Process Heating
FLOW ARRANGEMENT
MATERIALS OF CONSTRUCTION
Extended Surface, Plate-Fin Extended Surface, Tube-Fin Plate, Brazed Plate, Gasketed Plate, Lamella Plate, Spiral Plate, Welded Tubular, Double-Pipe Tubular, Shell and Tube, Plate Baffle Tubular, Shell and Tube, Rod Baffle Tubular, Spiral Tube Other Aluminum Brass Carbon Steel Ceramic Copper Exotic Metals Fluoropolymers Glass Graphite Nickel Stainless Steel Titanium Other Multi-Pass, Cross Counterflow Multi-Pass, Cross Parallel Flow Multi-Pass, Divided Flow Multi-Pass, Parallel Counterflow Multi-Pass, Parallel Plate Multi-Pass
CONSTRUCTION
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INDUSTRIES SERVED
Multi-Pass, Split Flow Single Pass, Counterflow Single Pass, Crossflow Single Pass, Parallel Flow Air Gas Glycol Heat Transfer Fluid Oil Refrigerant Steam Water Other Air to Air Air to Liquid Gas to Air Gas to Liquid Liquid to Liquid Steam to Air Steam to Liquid Other Cooling Distillation Evaporation/Condensation Feed Preheater Fibrous Effluent Heat Recovery Heat Transfer Interchanger Pasteurization Reactor Slurry Reboiler Vapor Recovery Other Chemicals/Petrochemicals Electronics Ethanol/Biodiesel Fuels Finishing Food Packaging/Printing Pulp/Paper/Converting Pharmaceutical Plastics/Rubber/Vinyl
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Do you manufacture and market replacement/ AFTERMARKET COVERAGE aftermarket parts for your heat exchangers?
METHOD OF HEAT TRANSFER
MEDIUM PROCESSED
* Yes * Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes * Yes * Yes Yes * Yes Yes Yes
www.process-heating.com • O c t o b e r 2 0 1 1
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Oxidizers
O
ne of the more difficult air pollution challenges to solve is odor. At times highly subjective, at others painfully obvious, the presence of odor is problematic for the emitter mostly because of the variability of claims by complainants. In fact, cases have occurred in which companies have spent millions of dollars to legitimately, and in popular opinion, effectively solve the odor problem — only to be at the mercy of the public that suspects a phantom odor, perhaps due to being exposed to one for so long. This danger of variability makes it incumbent on the industrial facility that the issue be solved effectively on the first attempt. Piecing together a solution by papering over it will inevitably lead to
Fixing a
Single valve rotary RTOs can help remove process odors in a cost effective manner when properly designed and installed. By James Stone, Dürr Systems Inc.
recurrence. Further complaints, bad press and monetary fines are likely to result. Because of tighter annual budgets for most companies, the piecemeal approach often occurs due to the tendency to find the lowest cost option instead of the most effective one. Initial capital investments into solutions that are inadequate inevitably fail due to subsequent costs of ongoing operation in the form of consumables p or p parts replacement. Instead,, industrial equipment owners facing an odor problem would do well to consider both the spec-
trum of available solutions as well as any history in solving a similar odor problem. An effective solution for odor problems lies on that path. The most common technologies for remediating industrial odor problems include: • • • • • •
Carbon or other sorbent filtration. Maskants or perfumes. Tall stack dilution or dispersion. g g Chemical or biological scrubbing. Biofiltration. Regenerative thermal oxidation.
Stinky Situation A single rotary valve style, regenerative thermal oxidizer was installed at a California pet food manufacturing facility to eliminate process odors in the exhaust.
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Oxidizers Of these options, thermal oxidation has often proven to be effective, particularly from the beginning of operation, and there is no need to add consumables or adjust chemistries. Destroying odors with high temperatures is rarely a question of effectiveness. Use of high temperatures — typically in excess of 1,500°F (815°C) — in a thermal oxidizer proves effective. It also often proves to be a slightly more expensive option to operate compared to less effective odor control systems unless the regenerative thermal oxidizer (RTO) is designed with maximum possible heat recovery to minimize use of purchased fuel. The typical argument against using thermal oxidation relates to the costs of ownership. However, because of advancements in equipment, a prudent purchasing agent can find a balance of cost efficiency and effectiveness with the right thermal oxidation technology. Once an oxidizer is in installed, ongoing maintenance costs may dim initial positive experiences of performance. In these cases, the main culprit is the valve sealing system that regenerative thermal oxidizers employ to direct air from chamber to chamber, to take advantage of ceramic heat exchanger beds for maximum fuel efficiency. The more of these flow-reversal valves on an oxidizer, the greater the chance for odor leakage as well as maintenance upkeep and cost. About 15 years ago, the rotary diverter valve design was introduced for regenerative thermal oxidizers. This single, heavyduty diverter replaces the multiple valves and actuators found on previous regenerative thermal oxidizer designs. The result is fewer moving parts, less wear, less downtime and lower maintenance costs. Unlike a valve sealing system, the single rotary diverter valve on these oxidizers never truly opens or closes by “making” a seat or seal. Instead, the diverter indexes across an open air path and methodically seals it off by reaching the next set position. A continuous air purge captures any scavenging dirty air in the switch and returns it for treatment in the oxidizer. This operation results in near-zero leakage of odor or dirty air and allows rotary regenerative thermal oxidizers to routinely
Burner Zone
D
E C Heat Recovery Chambers (Inlet Mode)
Heat Recovery Chambers (Outlet Mode)
Rotary Diverter Valve (Inlet)
B A
F Rotary Diverter Valve (Outlet)
Draft Fan
In the regenerative thermal oxidizer, the single rotary valve indexes across an open air path and methodically seals it off by reaching the next set position. A continuous air purge captures any scavenging dirty air in the switch and returns it for treatment in the oxidizer.
remove odor to below threshold detection levels in most cases. Installation of these systems is simplified by a pre-engineered, skid-mounted design that reduces site assembly time and cost. With this approach, nearly all electrical wiring and piping is completed on the unit prior to arriving on site, where just a few utility connections are required.
At Work Removing Odors A case study from a pet food manufacturer in California can help illustrate the effectiveness of regenerative thermal oxidizers, specifically those with rotary valve technology, to control odor. When the pet food manufacturer opened its production plant in California, the company began receiving complaints from nearby residents about an increasingly worsening odor being emitted from the process exhaust. Complaints began coming in at a rapid pace. Threats of fines
and sanctions from local government agencies were real possibilities. Recognizing the need to control the emissions and wanting to remedy the situation for its neighbors, the company invested nearly $4 million to solve the issue. However, despite the investment in odor control systems such as carbon canisters for adsorption and tall stack dilution, the odor lingered. The company then hired a manufacturer of regenerative thermal oxidizers with a single rotary diverter valve design to address the odor control issues completely. The oxidizer manufacturer had experience with food manufacturing applications and specifically with pet food manufacturing, which gave them experience they could leverage to find an effective, cost-efficient solution. The oxidizer manufacturer recommended installing a single rotary valve regenerative thermal oxidizer at the end of each www.process-heating.com • O c t o b e r 2 0 1 1
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Oxidizers
Tall stacks allow for dilution of odor molecules when sent to the atmosphere, but they are not a stand-alone or complete odor-eliminating solution.
of the pet food manufacturer’s process stream ducts. Because the company had confidence in the near-zero leakage single valve technology, the oxidizer manufacturer offered a series of guarantees concerning odor reduction along with the purchase of the systems. If the performance guarantees were not met, the oxidizer maker would be contractually liable for creating a new solution at its own expense. Initially, the pet food manufacturer had raised concerns about the cost of thermal oxidation technology to control the odor issue. To address those concerns, the oxidizer manufacturer designed a system to maximize fuel efficiency through the use of a proprietary heat exchange ceramic media block internally installed within the regenerative thermal oxidizer. If it were necessary, the oxidizer manufacturer also knew it could incorporate secondary heat recovery equipment at the end of the oxidizer to capture waste energy and allow it to be used in other parts of the pet food manufacturer’s facility.
For over 50 years, we have provided Electrical Safety Equipment for the Industry. For complete info, contact us at
[email protected]. Visit our website at www.protectioncontrolsinc.com
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As soon as the regenerative thermal oxidizer system was commissioned and started for process, plant employees and surrounding neighborhoods noticed a dramatic difference: no more odor. The complaints stopped and the threat of fines was eliminated. The systems have been in use since 2008, and they pet food manufacturer has not reported any system downtime. The goal in odor control is to effectively eliminate the problem. If the process cannot be changed, the use of odor control equipment will need to be instituted. While initial capital and system maintenance costs for regenerative thermal oxidizers may be more than other odor removal methods, the use of oxidizers is effective in eliminating odors. PH
James Stone is the senior key account manager with Dürr Systems Inc., Plymouth, Mich. For more information from the author, call (630) 248-6693, or from the company, visit www.durr.com.
Heaters
DON’T GET
All Fired Up Preventing self-heating of particulate solids is possible with safe drying operations. By Vahid Ebadat, Chilworth North America
M
any particulate solid materials can exhibit self-heating that, if unchecked, is likely to affect the quality of the product (at the least) or, more dangerously, progress to the point of fire or explosion. Self-heating can arise by one of the following different mechanisms: • Exothermic (Heat-Releasing) Chemical Reaction. These chemical reactions often are an oxidation reaction with air, similar to what occurs during a fire or explosion. At the start of the selfheating process, the reaction is slow, like steel that oxidizes (corrodes) with atmospheric oxygen to form rust. • Exothermic Decomposition. For unstable materials, decomposition results in less complex molecules and sometimes gases, while releasing heat. However, unlike an exothermic reaction, decomposition does not require additional reactants and is therefore largely independent of the environment, making it more difficult to predict its occurrence without detailed experimental studies. Some materials such as sawdust, coal, sewage sludge and grain can self-heat at ambient temperatures and spontaneously ignite in large-scale storage.
Figure 1. A test cell for bulk conditions measures 1.96" (50 mm) dia. and 3.15" (80 mm) high. Air diffuses into the sample through the open top of the cell and through the bottom of the cell, which is closed with a sintered glass disc. The sample temperature is measured continuously at various locations along the height of the cell.
When a material undergoes exothermic chemical reactions or decomposes exothermically, the temperature of the material will rise if the rate of heat generation exceeds the rate of heat loss to the environment. Further, the temperature rise of the material due to the exothermic reaction will exponentially increase the chemical reaction rate, resulting in a faster increase in temperature. This unstable process is referred to as self-heating. Self-heating begins at a temperature at which the rate of heat generation is greater than the rate of heat loss, and this temperature is called the exothermic onset temperature. Self-heating of solids and powders may
Figure 2. Various test cells for thermal stability testing are shown. The top left example is for aerated conditions, where air flows through the sample from top to bottom, which are both closed by sintered glass discs. The cylindrical section has the same dimensions as the bulk test cell. The top right example is a wire basket for basket testing. The example on the bottom is a sample tray for “air over layer” testing, where warm air flows over the powder layer.
result in smoldering, which can set the material on fire or cause dust explosions, particularly when a “smoldering nest” is disturbed and exposed to air. Many plants that have experienced self-heating incidents have had a history of near misses where some self-heating occurs but does not progress to full-blown ignition. In such cases, there may be black spots in an otherwise light-colored product, or a lump of charred product is found. It is important to recognize such occurrences as indications of a potentially serious problem and not just a “near miss.” Self-heating reactions also may produce flammable gases that can lead to gas/air explosions or pressure/volume explosions in closed process vessels. These gases also compromise product quality. www.process-heating.com • O c t o b e r 2 0 1 1
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Heaters
Figure 3 (above). The basket test sample holders are used for testing at different scales, allowing extrapolation to largescale storage conditions. The baskets typically have sides of 0.98, 1.96 and 3.94" (25, 50 and 100 mm). Figure 4 (right). The basket test sample holder is prepared for testing inside a laboratory oven.
Laboratory Tests to Simulate Self-Heating Behavior Several laboratory tests have been developed to simulate the conditions where the powder could be heated above the exothermic onset temperature. Examples include: • Bulk form (figure 1). • Layer form, with air flowing over the
powder (figure 2). • Aerated form (figure 2), where air is passed through the bulk of the product. This increases the oxygen availability for the reaction, but it also removes heat from the reacting material. For large-scale storage situations, tests are carried out on different scales so that the effect of the size of the bulk material can be assessed (figure 3). All tests are carried out
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in temperature-controlled ovens (figure 4). They allow screening tests with the temperature ramped up at a defined rate as well as isothermal testing with a constant temperature controlled within narrow margins. Because of the potential for violent reactions during the self-heating process, all equipment has explosion protection. Many solid materials can exhibit selfheating, which can affect the quality of the product or progress to a fire or even an explosion. Whenever self-heating incidents are investigated, we find that a common root cause is a lack of understanding of the self-heating phenomena. The self-heating hazard of solid materials that are subjected to heat should therefore be determined by conducting appropriate laboratory tests. The tests will be selected based on the type of heating/drying process that the solid material undergoes (for example, tray drying or fluidized-bed drying). The test results can then be used to determine safe heating/drying temperatures and durations, using sufficient safety margins. PH Dr. Vahid Ebadat is CEO of Chilworth North America, Princeton, N.J. For further information, call (609) 799-4449 or visit www.chilworthglobal.com.
Director of Product Development
WEB EXCLUSIVE
And service that doesn’t quit. What Causes Exothermic Heating?
Send us an email at:
[email protected] 28
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O c t o b e r 2 0 1 1 • Process Heating
Heat Transfer Specialists Since 1928
The exothermic onset temperature for self-heating is influenced by the chemical and physical properties.
www.superradiatorcoils.com
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Product Highlights Wondering where to find products beneficial to your process? This department provides a number of new products each month and allows you to easily request more information. Simply call those companies in which you are interested, or visit those companies’ web sites using the published web addresses.
Product P d c Take Take-Off Off Discharge Blower Heaters Now with 20 kW to 50 kW Options The line of horizontal and vertical discharge blower heaters from Chromalox has expanded to include units at 20 kW and 50 kW. The expansion gives the model HVH comfort heating blowers an even wider range of solutions for a greater variety of heating applications. The HVH provides vertical or horizontal airflow through versatile mounting configurations for either wall or ceiling. Its compact size allows for placement in tight spaces. Additionally, the HVH is attractive and easy to install, requires minimum maintenance and has a long life. The heaters are CSA-certified for use in the United States and Canada, as well as CE- certified to meet European standards. Model HVH blower heaters feature epoxy-sealed elements to reduce false trips on ground-fault equipment. To ensure easy service, the units are designed for easy access to
Steam-Heated Batch Oven Designed to process 35,000 lb of product with a guaranteed temperature uniformity of ±5°F at 240°F (±2.7°C at 115°C), confirmed via a 20-point profile test, the steamheated walk-in batch oven is used to cure water-based adhesive resin onto abrasives. The oven chamber has a maximum operating temperature of 300°F (149°C) and is constructed with high efficiency panel assemblies. Wisconsin Oven Corp. (262) 642-3938 • www.wisoven.com
Electrically Heated Universal Oven Used for paint baking operations, No. 953 has workspace dimensions of 36 x 36 x 48". The oven includes 9 kW installed in Nichrome wire heating elements, and a 600 cfm, 0.5-hp recirculating blower provides horizontal front-to-rear airflow. The universal 500°F (260°C) oven has 4" insulated walls, aluminized steel exte-
internal components through a large door at the bottom and a removable See p. 5 on how to use the Mobi Tag. case front. Optional controls on the front panel offer easy adjustments, monitoring and operation. Other features include a pilot light that indicates normal heater operation, outlet screen to prevent objects from coming in contract with the fan, and factory- or field-installed thermostats, fan controls and disconnect kits. The HVH can be used in a range of applications, including shipping and receiving areas, pump houses, power generating stations, aircraft hangers, factories, warehouses, garages and more.
Chromalox Inc. www.chromalox.com
rior, Type 430 stainless steel interior and an integral leg stand. Safety equipment required for handling flammable solvents is onboard, including explosion-venting door hardware, powered forced exhauster with airflow safety switch and purge timer. Grieve Corp. • (847) 546-8225 • www.grievecorp.com
Heat Transfer Oil Systems The HTF 350 Series offers both heating and combined heating/cooling units with capacities ranging 3 to 24 kW. The heat transfer oil systems offer users a range of heating capacities for controlling process temperatures up to 350°F (177°C). The small footprint unit is offered in three system configurations, each available with 5 and 10 gal/min flow rates. The heating only unit provides up to 24 kW of heating capacity and will heat a process automatically upon demand. The cooling only unit includes a heat exchanger that matches the amount of heat to be systematically removed from your process. The combined unit offers both heating and cooling for total temperature control of a process. Mokon • (716) 876-9951 • www.mokon.com www.process-heating.com • O c t o b e r 2 0 1 1
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Product Highlights Fast Response Medium Wavelength Lamps
ATEX Approved Differential Pressure Switch
Fast response medium wavelength (FRMW) lamps are engineered to radiate more energy within the medium wavelength range. Line speeds typically improve by 30 to 100 percent in the field, according to the company. They are suited for use with many substrates, particularly thin films and plastics. Offering a construction similar to shortwave T3 lamps, the medium-wave devices are available in lengths up to 52". Anderson Thermal Devices Inc. (800) 720-5256 • www.andersonthermal.com
Essential for hazardous industrial environments, the flame-proof ATEX approved Series AT21823 combines small size with 2 percent repeatability. Setpoint adjustment inside the switch allows for setpoint settings across nine ranges, from the low of 0.07" w.c. to a maximum 85" w.c. differential pressure. The enclosures also are offered in aluminum. Dwyer Instruments Inc. (800) 872-9141 • www.dwyer-inst.com
Y-Type Strainer Fig 34HP is rated to ASME Class 600 standards. It is designed to protect equipment from pipeline debris such as scale, rust, jointing compound, weld metal and other solids in flowing liquids or gases. The cast carbon steel Y-type strainers have a large screen area, providing high CV and low pressure drop as well as reducing the frequency of blowdown for cleaning. The strainer is capped, drilled and tapped to enable a blowdown valve to be fitted to drain and clean the screen in service. Strainer screen options include stainless steel, Monel, perforations and mesh. Spirax Sarco • (800) 883-4411 www.spiraxsarco.com/us
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O c t o b e r 2 0 1 1 • Process Heating
Autoclave Temperature Sensors Series S is designed for autoclave sterilization applications in pharmaceuticals/biotech, sanitary and process industries. The line includes chamber and load probes, light/heavy/extreme duty designs as well as standard or precision accuracy. Designs include single and dual elements, three- or four-wire configurations, sheath diameters of 0.125 to 0.375", and operating range of -58 to 392°F (-50 to 200°C). Chamber wall feedthrough options include sanitary caps and multi-probe ports. Burns Engineering • (800) 328-3871 www.burnsengineering.com
Product Highlights Drain Tempering Valve Self-actuating temperature control valve line includes a model with twice the flow capacity of the previous design. The 1" valve can be used in applications where a high volume of effluent must be tempered, including boiler blowdown, autoclaves and condensate drains. Thermo-Omega-Tech Inc. (877)379-8258 • www.thermomegatech.com
3++XEEHOOLQGG
Small, Electric Batch Ovens Line of small, electric batch ovens includes units capable of operating at 450°F (232°C). The ovens can be used to bake, cure, anneal or dry many substrates and coatings. The ovens utilize a bank of electric heating elements and recirculated air to heat products efficiently inside the 4" insulated, painted oven enclosure. Standard features include electronic temperature controls, batch timer with alarm device and a set of sturdy hinged doors on one end. Rapid Engineering LLC (800) 536-3461 • www.rapidfinishingequipment.com
DC Motor Speed Control SmartFan Aurora accepts analog control signals (0 to 5 V, 0 to 10 V, 0 to 20 mA, potentiometer) and adjusts the voltage to the motor from 0 percent to 100 percent output voltage. Voltage to the motor is varied using a buck control circuit that operates at a high frequency to achieve maximum power efficiency at minimum size. It operates from an AC (12 to 48 V) or DC (10 to 72 V) power source and can control 12, 24 or 48 VDC motors with a current rating up to 6 A. Control Resources • (978) 486-4160 • www.controlres.com
Protective Coating Endcor 8898 is intended for use on cast iron and steel surfaces requiring high gloss, color retention and weather resistance. Formulated to resist UV, chalking, fading, moisture and salt spray, this silicone-alkyd copolymer, self-priming coating is VOC compliant and can be applied over solvent-cleaned surfaces using conventional airless spray or brush. The single-component coating is 60 percent solids by volume and resists 300°F (149°C) continuous exposure. Dampney Co. Inc. • (617) 389-2805 • www.dampney.com
Your source for the highest quality Single & Multiple Channel Chillers on the market today.
Design
Custom Design available 6 standard chiller models to choose from Design your chiller one on one with our engineers From 2,500 to 380,000 BTU/hr Re-circulating Heat Only Systems available Various sizes available for your application and space requirements
Quality
Over 25 years of high quality manufacture and design Only the highest quality refrigeration and components used All motors thermally protected and tested All units are manufactured in our US facility Each unit goes through an in depth in-process and ¿nal quality inspection
401 Magnolia Avenue Croydon, Pa 19021 | (Phone) 215-788-5528 | (Fax) 215-788-7737 You can visit us on the web: www.tek-tempinstruments.com or email
[email protected]
www.process-heating.com • O c t o b e r 2 0 1 1
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31
PH Classifieds
Display Classified Rates: 1X $100 • 3X $95 • 6X $90 • 9X $85 • 12X $80
Equipment for Sale
Send advertising copy to: Process Heating/Attn. Becky McClelland Phone: (412) 306-4355 • Fax: (248) 502-1076 E-mail:
[email protected]
CAN-ENG FURNACES INTERNATIONAL LTD. z
z
Rebuilds z Retrofits z Combustion Controls z
Control Panels z Thermal Profiling z Ovens z Burners z Elements z
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Contact: JOE SALIBA (ext:2058) z KIM IAMARINO (ext:2037) z ANNA ROLFE (ext:2056)
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Boilers | Gas Turbines | Heaters | Furnaces
LHS Air Heater
Upgrade your LE to a Next Generation LHS air heater today www.leisterusa.com Toll-free: (855) Leister
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Need Thermal Fluid Heaters...
PH03084DuraliteClass.indd 1
Built-in thermocouple with digital temperature readout
2/19/08 2:47:23 PM
To find them, turn here: www.process-heating.com/buyersguide Locate the industrial equipment, components and services specifically used in applying, transferring, measuring, monitoring and controlling heat in the manufacturing operations that you need! • Search by Company Name or Product Category • Downloadable Product Spec Sheets • Alpha Company Listings • Live Web & Email Links • Product Photos
2011 Buyers Guide Start your search today! Watch for expanded - listings! www.process-heating.com/buyersguide
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Name ____________________________________ Title ____________________________ Company __________________________________________________________________ Address ___________________________________________________________________ City/State/Zip _______________________________________________________________ Work Phone ( ) ______________________ Work Fax ( ) ______________________ E-Mail Address______________________________________________________________ By providing your email address and fax number, you're giving us permission to email or fax future notices to you. If you do not wish to receive third-party email offers regarding information relevant to your industry, please check here. F
0109SUB Oct-1110SUB
Company
Phone
Fax
Web
E-Mail
4
APV, An SPX Brand
(919) 735-4570
(919) 731-5488
www.apv.com
[email protected]
11
Buhler Aeroglide
(919) 851-2000
(919) 851-6029
www.aeroglide.com
[email protected]
7
Chromalox
(412) 967-3803
(412) 967-5148
www.chromalox.com
[email protected]
10
CMM Group LLC
(920) 336-9800
(920) 336-9797
www.thecmmgroup.com
[email protected]
26
Dalton Electric Heating Co.
(978) 356-9844
(978) 356-9846
www.daltonelectric.com
[email protected]
13
Duratherm Extended Life Fluids
(800) 446-4910
(905) 984-6684
www.heat-transfer-fluid.com
[email protected]
30
Dwyer Instruments/Love Controls
(312) 733-7883
(219) 872-9057
www.dwyer-inst.com
[email protected]
16
Epcon Industrial Systems
(936) 273-1774
(936) 273-4600
www.epconlp.com
[email protected]
22
Gaumer Process
(713) 460-5200
(713) 460-1444
www.gaumer.com
[email protected]
6
General Combustion
(407) 290-6000
(407) 578-0577
www.gencor.com
[email protected]
2
Heatec
(423) 821-5200
(423) 821-7673
www.heatec.com
[email protected]
36
Heatec
(423) 821-5200
(423) 821-7673
www.heatec.com
[email protected]
31
Hubbell Electric Heater Co.
(203) 378-2659
(203) 378-3593
www.hubbellheaters.com
[email protected]
9
MultiTherm
(610) 408-8361
(610) 408-8365
www.multitherm.com
[email protected]
18
Payne Controls
(304) 757-7353
(304) 757-7305
www.payneng.com
[email protected]
23
Precision Quincy Corp.
(815) 338-2675
(815) 338-2960
www.precisionquincy.com
[email protected]
9
Process Heating Co.
(206) 682-3414
(206) 682-1582
www.processheating.com
[email protected]
10
Protection Controls
(847) 674-7676
(847) 674-7009
www.protectioncontrolsinc.com
[email protected]
26
Protection Controls
(847) 674-7676
(847) 674-7009
www.protectioncontrolsinc.com
[email protected]
12
Qmax Industries
(704) 643-7299
(704) 936-7702
www.qmaxindustries.com
[email protected]
28
Super Radiator Coils
(804) 378-1367
(804) 379-2118
www.superradiatorcoils.com
[email protected]
31
Tek-Temp Instruments Inc.
(215) 788-5528
(215) 788-7737
www.tek-tempinstruments.com
[email protected]
12
Wyssmont
(201) 947-4600
(201) 947-0324
www.wyssmont.com
[email protected]
3
Yokogawa
(770) 251-8700
(281) 340-3838
www.us.yokogawa.com
[email protected]
12/18/08 12:05:59 PM
www.process-heating.com • O c t o b e r 2 0 1 1
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33
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Places & Faces Casso-Solar Technologies LLC has moved to 506 Airport Executive Park, Nanuet, N.Y. 10954; phone (845) 3542010; fax (845) 547-0328; e-mail sales@ cassosolartechnologies.com; and web at www.cassosolartechnologies.com.
of pump technologies that are utilized in oil and gas processing, power generation and other industrial applications. Its primary products include centrifugal pumps and reciprocating pumps. It also provides aftermarket repair services on a global basis.
Stephen J. Miggels joined Radiant
Gas Technology Institute, Des
Energy Systems Inc.,
Plaines, Ill., opened its newest office in Pittsburgh, representing GTI’s local commitment to the natural gas industry in the Marcellus Shale fairway and the surrounding region.
Hawthorne, N.J., as project engineer to manage the new pilot coating line as well as design infrared and hot air process heating systems.
Miggels
Catalytic Products International, Lake Zurich, Ill., released a white paper for free download that describes how it expects new ozone regulations to affect manufacturing companies. “EPA Clamping Down on Ozone Standards” suggests how companies can deal with new requirements in a cost-effective way.
MadgeTech Inc., Contoocook, R.I., published a video about its ThermAlert Series dataloggers in the company’s YouTube channel. The
video reviews the different models as well as key features and benefits of the temperature-logging devices. To view the video, visit www.youtube. com/watch?v=B2VsuX-x418.
SPX Corp., Charlotte, entered into a definitive agreement with Clyde Blowers Capital s.ar.l, SCF-VI Offshore L.P., Appleby Nominees (Jersey) Ltd., and certain members of ClydeUnion management to acquire
ClydeUnion Pumps, Glasgow. The purchase price is $1.1 billion (£700 million). ClydeUnion Pumps is a global supplier 34
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O c t o b e r 2 0 1 1 • Process Heating
Metso Corp., Helsinki, will supply Vantaan Energia Ltd., Vantaa, Finland, with a heat recovery steam generator, including main accessories, installation and commissioning, valued at $21.4 million. The boiler will be installed at a new waste-to-energy plant in Långmossebergen in Vantaa. The heat recovery boiler will recover the excess heat from the gas turbine’s flue gases. Its main role will be to produce superheated steam for the steam turbine and low pressure auxiliary steam for the process as well as district heat. Unique aspects of the installation include the fact that the boiler not only produces its own steam but also superheats the steam from the two waste incinerators.
Redfish Instruments, Santa Cruz, Calif., introduced the iDVM digital multimeter that wirelessly connects to an iPhone, iPad or iPod Touch via an ad hoc wireless network. This allows users to acquire, visualize and share electrical measurement data on their Apple devices. The iDVM app can be downloaded free from the Apple App Store. Cabot Corp., Boston, was selected by Paris-based Technip to provide pipein-pipe (PIP) insulation for four subsea pipeline projects in the North Sea.
PUBLISHING STAFF Senior Group Publisher, Manufacturing Group TOM ESPOSITO • (610) 436-4220 ext. 8530 Publisher • ANNE ARMEL (847) 405-4043 •
[email protected] Associate Publisher and Editor • LINDA BECKER (847) 405-4020 •
[email protected] Contributing Editor • JOY LEPREE ANDERSON (856) 582-9554 •
[email protected] Art Director • COURTNEY FATHERS (248) 244-1292 •
[email protected] Production Manager • BETH MCCLELLAND (412) 306-4354 •
[email protected] Reprint Sales • JILL DEVRIES (248) 244-1726 •
[email protected] E-Media Sales • SUSAN HEINAUER (412) 306-4352 •
[email protected] Classifieds • BECKY MCCLELLAND (412) 306-4355 •
[email protected] Publishing Director, Manufacturing and Gaming Groups JOHN R. SCHREI • (248) 786-1637
EDITORIAL OFFICE 155 N. Pfingsten Road, Suite 205, Deerfield, IL 60015 (847) 405-4000 • FAX (248) 502-1001
ADVERTISING SALES NORTH AMERICA • Sean Meaney • National Sales Manager 530 Humiston Drive • Bay Village, OH 44140 (440) 895-0919 • FAX (248) 502-1051 •
[email protected] NORTH AMERICA • Anne Armel • Publisher 155 N. Pfingsten Road, Suite 205 • Deerfield, IL 60015 (847) 405-4043 • FAX (248) 786-1441 •
[email protected] EUROPE • Carolyn Eychenne • European Sales Representative 7 rue de Maurepas • 78000 Versailles France tel/fax: 011 33 1 30 21 15 62 •
[email protected]
CORPORATE STAFF BNP Media Corporate Office • (248) 244-6400
BNP CUSTOM MEDIA GROUP CHRISTOPHER WILSON (248) 244-8264 •
[email protected]
SINGLE COPY SALES ANN KALB • (248) 244-6499 •
[email protected]
LIST RENTAL KEVIN COLLOPY • Sr. Account Manager (800) 223-2194 x684 •
[email protected] MICHAEL COSTANTINO • Sr. Account Manager (800) 223-2194 x748 •
[email protected]
AUDIENCE DEVELOPMENT Audience Development Coordinator • CHRISTINA ROTH Corporate Fulfillment Manager • MEGAN NEEL Corporate Audience Audit Manager • CATHERINE M. RONAN
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Got Maintenance? Plant operators are finding out the advantages of having their heaters serviced by Heatec on a regular basis. There are important benefits of having a contract for our service technicians to do preventative maintenance once or twice a year. An important benefit is safety. Our technicians make sure all limit devices are working properly. Insurance companies usually prefer that specialists, such as Heatec technicians, perform services related to safety. Fuel savings is another important benefit that results from maintenance that includes tuning the burner. Moreover, preventative maintenance usually eliminates unexpected heater
shutdowns at times that interrupt production. Preventative maintenance can usually be done without adversely affecting production schedules. Another benefit is usually a reduction in costs for each service call. This results from lower travel expenses when our technicians can make service calls at other plants in the same area. Moreover, many of our technicians reside in diverse locations that reduce travel to plant sites. Call today to find out what kind of service contract would work best for you.
HEATEC
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