http://www.che.com Chemical Engineering en-us 2013 Mon, 20 May 2013 16:28:26 EDT Contact agitated dryers are used for drying wet powders, slurries, filter cakes, and applications where off-gases during the drying cycle must be contained. If the applications are also heat-sensitive, such as specialty chemicals, polymers, food products and pharmaceuticals, contact drying must take place at... http://www.che.com/extras/tables/9680.html Sat, 1 Sep 2012 0:00:00 EDT Fluidized beds are widely used in many chemical process applications to provide better heat and mass transfer between the fluid and the solid, compared to conventional packed- or moving-bed operations. This article summarizes the basic concepts of fluidized-bed technology and provides a useful collection of equations for the design and operation of gas-solids systems.... http://www.che.com/extras/tables/9573.html Wed, 1 Aug 2012 0:00:00 EDT Throughout the chemical process industries (CPI), the need to drain a tank or process vessel arises. In batch-type plants, it is a regular occurrence and is one factor that affects the total cycle time per batch and ultimately the entire production capacity of the plant itself.  Figure 1. In a vertical... http://www.che.com/extras/tables/9398.html Fri, 1 Jun 2012 0:00:00 EDT The approaches currently used by process integration specialists to assess the opportunities for the integration of reboilers are frequently erroneous and lead to proposals that have to be rejected at the detailed engineering stages or worse, to commissioned reboilers that do not perform properly. This... http://www.che.com/extras/tables/9180.html Sun, 1 Apr 2012 0:00:00 EDT In the chemical process industries (CPI) it is often necessary to verify material specification at various points in the process. In that effort, it is usually impossible — or at the very least impractical — to measure the whole production. Instead, small samples must be extracted from a parent... http://www.che.com/extras/tables/9183.html Sun, 1 Apr 2012 0:00:00 EDT The objective of this article is to present a stepwise understanding of how to calculate the NTU for a cooling tower, and thus to understand the basis of thermal design of counter-flow cooling towers for optimizing cost and performance.... http://www.che.com/extras/tables/8949.html Wed, 1 Feb 2012 0:00:00 EST Equilibrium stage simulations are the nearly universal process design tool for mass transfer columns that contact vapor and liquid in countercurrent flow. Whether the service is absorption, stripping, distillation, fractionation, quench or evaporation, equilibrium stage models make mass and heat balances... http://www.che.com/extras/tables/8550.html Sat, 1 Oct 2011 0:00:00 EDT Dilute-phase conveying systems generally use centrifugal fans and positive displacement blowers for supplying conveying air to the conveying system. However, for some conveying systems, compressed air from a central compressor station is also used. The two important criteria required for pneumatic conveying... http://www.che.com/extras/tables/8421.html Thu, 1 Sep 2011 0:00:00 EDT This article presents equations that allow the user to calculate liquid volume as a function of liquid depth, in both vertically and horizontally oriented tanks with dished heads. The equations accommodate all tank heads that can be described by two radii of curvature (torispherical heads). Examples include... http://www.che.com/extras/tables/8471.html Thu, 1 Sep 2011 0:00:00 EDT The introduction of “residual functions” (defined as the difference between a property of the real gas and that property for an ideal gas held at the same temperature and pressure) simplifies the calculation of thermodynamic function changes, such as the enthalpy or the entropy, when the conditions of a gas are changed.... http://www.che.com/extras/tables/7981.html Sun, 1 May 2011 0:00:00 EDT