Influence of overflow port selection on the gas desulfurization of gas cyclone–liquid jet absorption separator

Abstract The purification of industrial sulfur‐containing tail gas mainly adopts the wet flue gas desulfurization of gas–liquid mass transfer, and a new separator utilizes the gas–liquid coupling field to rapidly update the effective phase boundary area in the reaction process to enhance the mass transfer effect. This study used NaOH solution as the reaction liquid phase to determine the effects of the selection of overflow port of gas cyclone–liquid jet absorption separator on gas desulfurization efficiency under the changing rates of gas and absorption liquid flow. Results showed that desulfurization efficiency decreased as the diameter of the overflow port increased but increased as the depth of the overflow port increased. The optimal design ratio Dx/D 1 of overflow tube diameter Dx and separator tube diameter D 1 is 0.35, and the optimal design ratio S/H 1 of overflow tube insertion depth S and separator tube length H 1 is 0.62. At constant operating conditions, overflow port selection can increase desulfurization efficiency by up to 20%, which provides optimization guidance for the structural design of a gas cyclone–liquid jet absorption separator.