Archives :: Processing & Handling :: Thermal & Energy Management

Displaying 1 - 20 of 424 stories.
November 1, 2014
Burners are mechanical devices that are utilized for mixing proper quantities of fuel and air, and also for maintaining a stable flame inside fired equipment. Burners are critical components that must be periodically maintained to ensure the reliability of fired equipment in the chemical process industries (CPI), as well as many other industries. This article discusses the internal components and...
November 1, 2014
Bulk solids are frequently used as reactants, catalysts or products in chemical process industries (CPI) operations. Often, they must be heated or cooled so that they can be handled safely or processed at a desired temperature. Traditionally, heat transfer to or from powders is carried out using heated or water-cooled screws, fluidized beds or rotating drums. However, a more economical means of heating or...
September 1, 2014
Collecting representative samples of heat-transfer fluid for routine quality checks falls short of the goal if safety or the environment is compromised. While users should consider their systems’ unique design features in consultation with their safety and health experts, incorporating the tips below can help to avoid common potential safety concerns associated with sampling these fluids, which may...
August 1, 2014
Fuel combustion in engines, power plants, boilers, furnaces and other equipment provides energy for transportation, heating, electricity and goods manufacturing. Optimizing efficiency while lowering pollutant emissions is the main goal of industrial combustion, and reaching those goals, coupled with climate-change issues, have triggered a great deal of research in this field. One approach to improving the...
July 1, 2014
This new tube-in-tube heat exchanger is designed for heating and cooling sludge that contains fibers and particles, making this equipment ideal for use with most kinds of wastewater sludge. The heat exchanger consists of a single tube mounted inside an outer shell tube. The...
May 1, 2014
Plate-and-frame heat exchangers, or plate heat exchangers (PHEs), are a type of compact heat exchanger. PHEs have been widely used in the food industries, mainly because they easily meet health and sanitation requirements due to their simple disassembly for cleaning. They have recently become more common in the chemical process industries (CPI) for certain applications and operational conditions...
May 1, 2014
Large petroleum-refining complexes often have dozens of fired heaters, making broad-based competency in this area essential to overall reliability, safety and energy efficiency. Despite industry’s widespread familiarity with fired heaters, they continue to pose significant challenges during initial control-system design and unless properly specified, operated and maintained, fired heaters can hinder...
April 1, 2014
Last month, Alfa Laval AB (Lund, Sweden; introduced a new range of tantalum heat exchangers that offer the corrosion resistance of a solid-tantalum heat exchanger, but at a much lower investment cost. The heat exchangers are made of stainless steel that has undergone a surface treatment whereby a thin layer of tantalum is metallurgically bonded to all surfaces that are...
March 1, 2014
The Steam-Flo SF-50 steam generator provides a portable source for low-pressure steam. The SF-50 features a 50 horsepower boiler unit and is capable of producing up to 1,725 lb/h (782...
January 1, 2014
Corrosion and deposition in boilers, steam turbines and many types of process equipment are among the most expensive causes of outages in utility and industrial steam plants. Deposits and scale buildup on heat-transfer surfaces reduce efficiency, and when allowed to accumulate on steam turbines, such buildup can reduce the capacity. Corrosion-related failures can result in outages ranging from a few days...
December 1, 2013
Petroleum refineries generate power from a number of sources, including cogeneration plants and steam networks. Generally, steam networks use turbines to improve operational reliability, specifically as drivers for rotating equipment. Due to increasing energy costs, it is essential to maximize the power-generation capabilities of steam networks. This article presents a spreadsheet-based optimization model...
November 1, 2013
When it comes to heat exchangers, chemical processors have a lot to consider. The most common concerns include fouling, heat-transfer efficiency, and the ability of the equipment to handle the high temperatures, high pressures and corrosive materials associated with the manufacturing of chemicals. And heat-exchanger manufacturers are continuously tweaking existing technologies to better suit the unique...
November 1, 2013
Industrial microbiology continues to hold the promise of producing an increasingly large array of commercially important chemicals because an ever-wider number of useful microbes is being developed and successfully deployed at commercially viable scales. Today, many of these bio-based chemicals are needed in quantities so large that existing fermentation technology is inadequate, and this is pushing the...
November 1, 2013
Anticipating growing demand for producing larger gears, shafts and other components, this sub-contract heat-treatment specialist has enlarged the size of one of its largest pit...
October 1, 2013
Boilers generate steam using different methods to circulate the steam-water mixture through the evaporator tubes. These methods include natural circulation (Figures 1, 2a–2c), forced circulation (Figure 3a), and a once-through design. Figures 3b, 4 and 5 show examples of a waste-heat water tube and fire-tube boilers with external downcomers and risers. Most boiler systems have evaporator tubes heated...
September 1, 2013
Solid and serrated fins (Figure 1) are widely used as heat transfer surfaces in boilers and heaters. The use of finned tubes makes heat exchanger equipment compact. The fluegas pressure drop is also decreased relative to a comparable plain-tube design, resulting in lower operating costs. Fin geometry, such as fin density (fins/in.), fin height and fin thickness, should be selected with care as it impacts...
September 1, 2013
The new Hydrosafe indirect electric heat exchanger is a complete thermal system designed for use in the harsh environments found in oil exploration and extraction, petroleum refining and petrochemicals. Minimizing potential leaks, the Hydrosafe’s one-piece, non-welded design makes this...
August 1, 2013
The management of process plants requires understanding and applying the fundamental tenets of safe design, construction and operation of facilities. This overview summarizes best practices that have been developed to ensure the safest possible use of DP:DPO (diphenyl–diphenyl oxide) eutectic heat-transfer fluids. A review of the concepts necessary for effectively maintaining a leak-tight...
July 31, 2013
Thermal energy accounts for around 70% of industry’s final energy consumption in Europe. Solar collectors can provide the majority of this industrial process heat. Although the application of solar collectors for industrial applications will depend on the application and the location, two main arguments for using solar collectors are saving energy (and costs) and reducing environmental impact. Saving...
May 1, 2013
Shell-and-tube heat exchangers are one of the most important and commonly used process equipment items in the chemical process industries (CPI). If you are working on a project during either the basic or the detailed engineering phase, there is a good chance that you will need to specify one or more shell-and-tube exchangers — and perhaps many of them. While the actual design will likely be done...
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