Wetted wall venturi scrubber with a 2-stage venturi throat

Abstract

A venturi scrubber, which avoids clogging in the throat by dust particles, includes a venturi tube, two scrubbing fluid conduits and a scrubbing fluid tank. The venturi tube has a converging section, a diverging section and a throat section which is connected between the converging section and the diverging section. The scrubbing fluid conduit has a top end connected with the bottom end of the converging section of the venturi tube, and the scrubbing fluid conduit is connected with the scrubbing fluid tank. Thereby, scrubbing fluid can be guided directly into the scrubbing fluid tank without passing through the throat section. As a result, the clogging of dust particles on the converging section of the venturi throat can be minimized and the abnormal increase of the pressure drop of the throat can also be avoided.

1 . A wetted wall venturi scrubber, comprising:
 a venturi tube, said venturi tube comprising a converging section, a diverging section and a throat connected between said converging section and said diverging section, said throat comprising a gas inlet, said diverging section comprising a gas outlet;   a conduit, said conduit having a top end connected with a bottom side of said converging section and a bottom end; and   a storage tank connected with the bottom end of said conduit;   wherein said storage tank stores a scrubbing fluid; the bottom end of said conduit extends below the level of said scrubbing fluid in said storage tank.   
     
     
         2 . The wetted wall venturi scrubber as claimed in  claim 1 , further comprising an atomized sprayer mounted inside said converging section of said venturi tube. 
     
     
         3 . The wetted wall venturi scrubber as claimed in  claim 1 , further comprising an overflow gutter connected with said converging section of said venturi tube. 
     
     
         4 . The wetted wall venturi scrubber as claimed in  claim 1 , wherein said throat of said venturi tube has a boundary wall extended to the inside of said converging section. 
     
     
         5 . The wetted wall venturi scrubber as claimed in  claim 1 , wherein said venturi tube and said conduit are formed of an outer tube and an inner tube; said converging section of said venturi tube and said conduit are formed in said outer tube; said throat and said diverging section of said venturi tube are formed in said inner tube; said outer tube comprises a through hole for the insertion of one end of said inner tube.