Countercurrent exchange

About: Countercurrent exchange is a research topic. Over the lifetime, 2255 publications have been published within this topic receiving 28687 citations. The topic is also known as: Countercurrent exchange.

Countercurrent heat exchanger and its application to air distillation plants

Abstract: Counter flow heat exchanger with a first fluid near ambient temperature and a second fluid at a temperature less than -20 degrees C. The first fluid circulates centripetally from an external radial inlet (17), and the second fluid circulates centrifugally fr an internal radial inlet (18). Air distillation unit which includes such an exchanger. Cryogenic cooling process using such an exchanger At least one passage connects the two inlets and is flowed through alternately by the two fluids in opposite directions. Th passage contains packing in at least part of its length, for heat accumulation or selective adsorption of some components of the fluids. Each packing is in an annular bed (23) and the packing particles have a diameter smaller than 15 mm and preferably betwe and 10 mm. The heat exchanger is designed to cool air for distillation and remove water and CO2 and other impurities from the air during the cooling process.

A Correlation of Flooding Velocities in Countercurrent Gas-Liquid Contactor of Column Type

Abstract: In this report, the analogies of the maximum allowable liquid and gas velocities in various countercurrent gas-liquid contactors of column type are considered analytically. That is, by plotting the flooding points of various columns in a gas-liquid separated coordinates, the similar curves have been obtained in each column. Because the difference of these curves is due to the shape of each column, the difference of each shape must be corrected and evaluated as a ahape factor. Then, by containing this factor in coordinate variables, various flooding points in each column may be correlated by a single curve. If this correlation curve is used, the flooding velocity can be estimated easily, and the maximum allowable liquid and gas velocities in these countercurrent contactors of column type can be compared.

Method and device for centrifugal extraction

Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for centrifugal extraction, which enable a countercurrent contact between a continuous phase and a dispersion phase and can perform high-resolution multi-stage extraction conveniently and stably. SOLUTION: In a method for countercurrent centrifugal extraction, where a continuous phase and a dispersion phase are brought into countercurrent contact, emulsion is formed between two phases of the continuous phase and dispersion phase, and a Taylor-Couette flow is generated while maintaining the formed emulsion state as it is. COPYRIGHT: (C)2009,JPO&INPIT