Aires interfaciales et coefficients de transfert de matière dans un laveur type à jet pulvérisé de liquide dans un Venturi

Interface areas and mass transfer coefficients in a scrubber operating with an atomized jet in a Venturi tube

¹ Laboratoire des Sciences du Génie Chimique (Nancy)
² SAPS Anticorrosion

Abstract

The working principle and the specific working properties of a venturi-jet scrubber are first described. Then the equipment is presented. The hydrodynamics performances are characterized by an auto aspiration diagram where the aspirated gas flow rate with the corresponding depression at the gas inlet are reported in function of the pressure of the liquid injected at the nozzle. The liquid hold up is also an important parameter. The mass transfer performances are characterized by the gas-side and liquid-side mass transfer coefficients and the interfacial area. These parameters are determined by the chemical technique of gas absorption with chemical reaction. The influence of the gas and liquid flow rates is shown. The values of the mass transfer parameters are compared with those of other gas-liquid scrubbers to precise the operation domain of the venturi-jet scrubber and then with those of the laboratory-scale models that could simulate and predict a priori and globally the performance of the present equipment. The principles of such an integral simulation are briefly recalled and this technique has led to simulate the pilot venturi-jet scrubber by a laboratory-scale laminar jet within a 20% accuracy. The results of the simulation experiments are reported.