A Examination for the Design of Venturi Scrubber

The relations between collection efficiency and pressure drop for the venturi scrubber are calculated by means of combined method which have been reported by several authores. The method, which is based on the washing factor owing to the inertia impaction reported by Barth, is applied to the calculation for the collection efficiency of the venturi scrubber. The pressure drop is calculated from the equation with consideration for the friction factor, the divergent loss and the acceleration loss of atomizing drops in the venturi tube.To maka the collection efficiency more effective it can be suggested that the venturi tube be made longer by a certain length at the throat. The operation of venturi scrubber, in which liquid is injected into the venturi throat with a large liquid-gas ratio, is more advantageous than with a high gas velocity at its throat. The lower pressure drop would be obtained when the scrubber having a large F-value is operated with a multi-stage connected in series than in a single-stage.