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September 1, 2012
Sparging refers to the process of injecting a gas through a diffuser into a liquid phase. It is used in both physical and chemical process applications. In physical process applications, the gas is used to either dissolve gas into liquid (such as aeration and carbonation) or to remove contaminants from the liquid phase (such as oxygen stripping, volatile organic compound stripping and water stripping). In...
http://www.chemengonline.com/extras/pdf/Gas-Sparging_9681.html
September 1, 2012
Pumps are among the most commonly used machines in the chemical process industries (CPI). Condition monitoring tests and predictive maintenance can help pump operators determine when to overhaul pumps in a way that minimizes costs. Despite pumps’ ubiquity and large energy demands, however, relatively little information is available on how to apply predictive maintenance approaches and condition...
http://www.chemengonline.com/extras/pdf/Condition-Monitoring-Methods-for-Pumps_9682.html
September 1, 2012
Corrections: From the October 2012 Letters page: This original article, which appeared in the print edition of Chemical Engineering (September 2012), had two errors: Equation (19) should read D = log (TH)-0.4, and Table 2 was missing decimal points in all numbers on both the x- and y-axes. The corrections are shown here. Recirculating cooling-water systems are essential parts of many facilities throughout...
http://www.chemengonline.com/extras/pdf/Cooling-Water-Outlet-Temperature-Evaluating-The-Best-Maximum-Value_9683.html
September 1, 2012
Nathan Cooper Duckworth Shana'a Matzen John Nathan becomes director of operations for Magnetic Products (Highland, Mich.).   Intellitect Water (Hants, U.K.) makes two appointments: Mark Duckworth becomes engineering manager in product development; Jo Cooper becomes product and market specialist.   CleanTech Biofuels (St. Louis, Mo.) names James E. Russell...
http://www.chemengonline.com/extras/pdf/Nathan-becomes-director-of-operations-at-Magnetic-Products-_9684.html
September 1, 2012
This article is the first in a two-part series, in which the types of process vacuum equipment (steam ejector systems and mechanical vacuum pumps) are discussed.1 Emphasis is given on how they are constructed and operate, and how to design associated parts of the systems (such as foundations, suction piping, discharge piping, and so on), to ensure safe operation. Many unit operations — including...
http://www.chemengonline.com/extras/pdf/Vacuum-Systems-Recommendations-For-Safe-Operation_9685.html
September 1, 2012
Plant Watch Air Products to build world’s largest energy-from-waste facility in the U.K. August 7, 2012 — Air Products (Lehigh Valley, Pa.; www.airproducts.com) plans to build and operate a renewable energy plant in the U.K. using advanced-gasification energy-from-waste (EfW) technology. The Tees Valley plant, located at the New Energy and Technology Business Park, near Billingham, Teesside, is...
http://www.chemengonline.com/extras/pdf/Air-Products-to-build-worlds-largest-energy-from-waste-facility-in-the-U-K-and-more-business-news_9686.html
August 1, 2012
Achema 2012 — the 30th International Exhibition Congress on Chemical Engineering, Environmental Protection and Biotechnology that occurred in late June in Frankfurt am Main, Germany — took a decidedly forward-looking stance, focusing on a set of topics that the chemical process industries (CPI) will have to address in the future, including increased attention on sustainable processes and...
http://www.chemengonline.com/extras/pdf/Achema-2012-takes-a-forward-view_9516.html
August 1, 2012
NORTH AMERICA World Class Process Safety Management for Chemicals, Petrochemicals & Refining. T.A. Cook Consultants (Houston). Phone: 919-510-8142; Web: tacook.com/psmusa Houston, Tex. September 18–20   Plastics in Photovoltaics 2012. Applied Market Information LLC (Wyomissing, Pa.). Phone: 610-478-0800; Web: amiplastics.com/events Phoenix, Ariz. September 19–20   Polyurethanes...
http://www.chemengonline.com/extras/pdf/Calendar-September-November-2012_9523.html
August 1, 2012
The main function of the expansion tank in a heat-transfer system is to allow space for the heat-transfer fluid to expand as it is heated. A properly designed, installed and maintained expansion tank will support longer fluid and equipment life, safe operation and easier maintenance. Configuration The expansion tank is best located at the highest point in the system to provide a positive pressure head to...
http://www.chemengonline.com/extras/pdf/Heat-transfer-expansion-tank-design_9550.html
August 1, 2012
There is a temptation that steam design engineers find difficult to resist — to put condensate from high-pressure (HP) steam mains directly into the low-pressure (LP), pumped condensate-return (CR) mains. After all, the CR main is so convenient — it is generally laid right next to the outgoing steam main in the same tunnel, trench or racks as the CR main returning to the steam plant. And, the...
http://www.chemengonline.com/extras/pdf/Waterhammer-In-Condensate-Return-Lines_9551.html
August 1, 2012
Globe-style control valves are in virtually every chemical processing line where pressure and flow must be controlled. And for the most part, they perform as required, day in and day out, requiring little to no thought or attention. In short, control valves are not an everyday topic of discussion. In fact, the globe valve provides a direct contrast to today’s consumer electronics where major changes...
http://www.chemengonline.com/extras/pdf/Control-Valves-An-Evolution-In-Design_9553.html
August 1, 2012
Dearth Scott Palucci Cohen Dalvi   Calgon Carbon Corp. (Pittsfield, Pa.) names Randall Dearth as president and CEO and Seth Schofield as independent chairman of the board. Jörg Krüger joins Orion Engineered Carbons (Kingwood, Tex.) as senior vice president of global operations. Russell Scott becomes president of the U.K.-based Institution of Chemical...
http://www.chemengonline.com/extras/pdf/Randall-Dearth-becomes-president-and-CEO-of-Calgon-Carbon-_9557.html
August 1, 2012
The earliest application of the fundamental concepts of fluidization dates back to 16th century when a German scientist (Georgius Agricola) described a process to upgrade ores. However, it was not until the 1930s, with the development of the Winkler coal-gasification process, that commercial use of fluidized beds on an industrial scale was recognized. The need for gasoline during the World War II...
http://www.chemengonline.com/extras/pdf/A-Primer-on-Gas-Solids-Fluidization_9573.html
July 1, 2012
Gas Turbine Engineering Handbook. 4th ed. By Meherwan P. Boyce. Elsevier Inc., 30 Corporate Drive, 4th floor, Burlington, MA. Web: elsevierdirect.com. 2011. 1,000 pages. $150.00. Reviewed by Amin Almasi, Rotating machine consultant Brisbane, Australia Gas turbines are cornerstones of modern industry and are widely used in the chemical process industries (CPI). New developments have increased the number of...
http://www.chemengonline.com/extras/pdf/Consultant-Almasi-reviews-gas-turbine-book_9439.html
July 1, 2012
This bioprocessing tubing is weldable Watson-Marlow Tubing, PureWeld XL tubing is a weldable tube for the biopharmaceutical and pharmaceutical industries, and is designed for high-purity and secure peristaltic pumping. A high-quality tube capable of completely secure welding, PureWeld XL allows for connector-free fluid paths to be assembled in minutes. PureWeld XL was developed in the company’s...
http://www.chemengonline.com/extras/pdf/Focus-on-High-purity-Processing_9453.html
July 1, 2012
Corrosion is a large and complex issue that is critical to the chemical process industries (CPI) as well as other industry sectors. Corrosion not only affects personal property like cars and homes but also affects commercial assets such as storage tanks, buildings, bridges, process equipment, and all types of piping. While corrosion is seen every day in our personal and professional lives, we rarely pause...
http://www.chemengonline.com/extras/pdf/Internal-Corrosion-Sampling_9454.html
July 1, 2012
Automated systems for batch weighing can improve overall product quality by raising the accuracy and consistency of the mixture compared to what can be achieved with the manual addition of pre-weighed bags. Automated batch-weighing systems integrate load cells with connections, valves, relay hardware and process control software. These systems control one or more pieces of feed equipment that deliver...
http://www.chemengonline.com/extras/pdf/Automated-Weigh-Batching-Systems_9455.html
July 1, 2012
The ability to model a process to see if it meets project requirements and is economically viable enhances the conceptual design. Modeling gives engineers a means to identify the most promising processes, in terms of capital investment and return, and this can be particularly important when the project is environmentally oriented (a so-called green project). Did you ever consider producing a new product...
http://www.chemengonline.com/extras/pdf/Evaluating-Green-Projects-Modeling-Improves-Economic-Benefits_9457.html
July 1, 2012
Plant Watch Solvay to build bio-based epichlorohydrin plant in China June 11, 2012 — Solvay S.A. (Brussels, Belgium; www.solvay.com) says its Thai affiliate Vinythai will build an epichlorohydrin plant in Taixing, China. The plant, with an initial capacity of 100,000 ton/yr, will cost €155 million and will start up in the second half of 2014. It will use Solvay’s proprietary Epicerol...
http://www.chemengonline.com/extras/pdf/Solvay-to-build-bio-based-epichlorohydrin-plant-in-China-and-more-business-news_9459.html
July 1, 2012
In designing and sizing relief-device and effluent-handling systems, one commonly overlooked aspect of the performance is examining the potential for low temperatures that can cause the components of the system to reach temperatures below their respective, minimum-design metal temperatures (MDMT), which may result in brittle fracture with subsequent loss of containment. This article points out limitations...
http://www.chemengonline.com/extras/pdf/Overpressure-Protection-Consider-Low-Temperature-Effects-in-Design_9460.html
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