Chlorine and hydrogen chloride gas emissions cleaning in vinylchloride production

Abstract

The paper gives the data on mathematical modeling of simultaneous absorption of chlorine and hydrogen chloride by alkaline solutions. The mathematical model of the process includes the system of differential equations of component-wise material balance and the system of kinetic equations. The system of material balance equations describes the change in concentrations of components along the column height. For its solving it is necessary to know the numerical values of chemisorption acceleration coefficients. They are determined from the system of equations describing the inetics of chemisorption. The gradients of components oncentrations create various conditions of mass transfer processes along the height of the column. This leads to the fact that in one unit there can be various zones of hemisorption process along the height of the packed layer. Each zone is characterized by its reaction order for absorbing component and its kinetic constants. Various zones of the course of binary absorption with chemical reaction were considered. Taking into account the zones, the mathematical model of chemisorption was designed for the countercurrent packed absorber. The peculiarity of the developed mathematical model is the lack of iterative algorithm for calculation. The use of band mathematical model of chemisorption of two gases allows calculation of similar columns at the stages of design and research of industrial processes. The results can be used for calculation and optimization of existing columns of gas emission neutralization in organochlorine production.