SWIRL STAGES FOR HEAT AND MASS EXCHANGE EQUIPMENT
UDC 66.015.23
Abstract
The results of experimental studies of hydrodynamics and mass exchange at vortex stages in bubbling mode are presented, as well as data of numerical simulation by finite element method using models of k-ε This made it possible to establish the presence of circulation movement of liquid at the stage, to determine profiles of phase speeds, to obtain the value of initial speed of gas phase movement, at which coordination of experimental and design values of liquid speed is observed. The design method shows the effect of the cylindrical partition installed between the swirler and the stage wall on the fluid velocity profile and its distribution in the working volume. It is proposed to use the obtained results of numerical modeling when designing multi-element stages to provide the required hydrodynamics on it.
New vortex contact devices with annular channels, having lower hydraulic resistance compared to tangential devices and providing a developed interfacial surface, stable without fluctuations, operation of the stage at high gas and liquid flow rates, have been investigated.
Data are presented for determination of hydraulic resistance of vortex stage, value of interfacial surface, coefficients of mass output and efficiency in investigated range of loads of liquid and gas L/G = 10-150.
Designs of vortex contact stages for industrial brew column have been developed. Contact devices with ring channels allow to bring dissipation of energy in a gas phase in the bubbling and ring mode to 5 W/kg, to increase an interphase surface to 2000 m-1 and to reach the size of superficial coefficient of a massotdacha about (0.5-0.8)·10-3 of m/s.
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