直交流カスケード型充填塔の操作特性

概要

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A crossflow cascade packed column having characteristics of both counterflow and crossflow operations was designed, and the degree of axial dispersion in the liquid phase, the flow pattern of the liquid, the pressure drop of gas in the column, and the absorption efficiencies for the CO<SUB>2</SUB>-Air-H<SUB>2</SUB>O system were investigated experimentally. The following facts became clear : (1) The Peclet number of the liquid phase in the crossflow cascade column is almost the same as that in the counterflow column. (2) When the concentration of carbon dioxide in the feed gas stream is 2%, the overall volumetric mass transfer coefficients in both 8- and 6- stage cascade columns used in the experiments are the same as those in the counterflow column. (3) The crossflow cascade operation can be performed normally even at gas velocities above the flooding point in the counter flow column. (4) The pressure drop of gas is considerably less than that in the counterflow column under the same operating conditions, In particular, the crossflow cascade column exhibits excellent perfomance at increasing liquid and/or gas velocities.
社団法人化学工学会の論文