When Temperatures are Bears
In Don Robson’s “Three Cool Solutions,” the vice president of engineering of Robson Industries Inc., West Chester, Pa., outlines the factors involved in designing or specifying a process water cooling system. Robson notes that in general, industrial process water is cooled by evaporative cooling towers, air-cooled heat exchangers or refrigerant chillers. Regardless of the system chosen, it is essential to review and understand the manufacturer’s specifications for cooling water to design or specify a successful system. The water temperature required for the process also will influence the type of system you choose.
End-users who are hoping to speed up production, save on natural gas costs and reduce emissions, or simply get more heat into the product more quickly are taking another look at electrotechnologies such as infrared, ultraviolet, microwave and electron beam. If these technologies sound like they might be right for your process, check out our “Electrotechnologies Review,” which outlines the main points of the most common technologies.
If your process heaters are providing the “just right” temperature, but you want some comparative bids from other manufacturers, check out our Equipment Overview on Convection and Conduction Heaters. The four-page grid shows the capabilities of more than 70 heater manufacturers and can help you narrow the field to the type of heater you want quickly. It’s also on our web site with an interactive search that allows you to select multiple categories and narrow or widen the search results nearly effortlessly -- by simply changing your selects or the type of search you run. Turn to page 32 to learn more.
NFPA 86 requires ovens, furnaces and related equipment to be designed to minimize the fire hazard inherent from equipment operating at elevated or high temperatures. Whether your process temperatures are too high, too low or just right, you must ensure that your ovens, dryers and related equipment are designed to the specifications of this important safety standard. Limit controllers are an integral tool in complying with the safety standard, and in “Safety First,” Mark Ingram of RKC Instruments, West Bend, Ind., explains how their use can help protect your plant and personnel.
Finally, in “Recycling PET Packaging,” Jason Stursa and Girish M. Bhatt, Ph.D., engineers at Minneapolis-based Bepex International LLC, suggest environmentally friendly, cost-effective recovery technologies for PET used in packaging such as the ubiquitous water bottle. Improved margins are possible when the material is recovered for applications such as food and nonfood containers, industrial yarn, monofilaments, strapping, film, sheet and building materials such as foam boards. These applications require high-quality recycled PET flakes or pellets with higher intrinsic viscosity (IV) and lower contaminant contents.
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