GAS CONTENT AND HEIGHT OF TWO-PHASE LAYER ON BUBBLE TRAYS.

This paper is concerned with the hydraulic calculation of chemical equipment with bubble trays (distillation columns, absorbers, rectificators, etc) with particular attention to the determination of such parameters as the gas content phi and the height of the bubbled layer H//b. An analysis of the data available in the literature indicates that the equations used in determining phi and H//b do not take into account such a highly important parameter as liquid circulation. This paper presents a derivation of equations for the determination of the average gas content phi and H//b, based on the assumption that a) the bubbled layer is a pseudocontinuous medium; i. e. , the values of the parameters, averaged through each section, vary in a sufficiently continuous manner. Further, the use is made of a theorem from general mechanics as to the momentum with the assumption that the velocity distribution for liquid and gas particles in the bubbled layer occurs in such a manner that the change in momentum of these particles, which is equal to the resultant of all external forces N applied to their mass, tends toward a minimum. Characteristics of apparatus and gas/liquid systems used in obtaining experimental parameters are tabulated.