Supersonic venturi scrubber

摘要

A method of removing contaminants from a gas stream utilizing a supersonic venturi including a converging section, a throat, and a diverging section is provided. A contaminated gas stream and a scrubbing liquid stream are introduced into the converging section, thereby forming a mixed stream which experiences choked flow upon exiting. The choked mixed stream is introduced into the throat section wherein the scrubbing liquid is contacted with the contaminated gas stream. The contaminated scrubbing liquid stream is removed from the supersonic venture scrubber, and an essentially pure gas stream is removed from the diverging section. A flow modification device may be introduced into the throat section. The flow modification device may be either axially or radially adjustable in order to effect the atomization of the scrubbing liquid and/or the contacting of atomized scrubbing liquid with the contaminated gas stream within the throat section.

主权项

1. A method of removing contaminants from a gas stream utilizing a supersonic venturi scrubber comprising a converging section, a throat, and a diverging section, the method comprising the steps of
introducing a contaminated gas stream at a velocity below the speed of sound into said converging section; introducing the contaminated gas stream in the presence of a scrubbing liquid into said throat section to form a mixed stream under conditions to produce choked flow; flowing the mixed stream out of the throat section and into the diverging section thereby increasing the velocity of the mixed stream to be above the speed of sound, wherein said scrubbing liquid is atomized and contacted with said contaminated gas stream thereby producing an essentially pure gas stream and a contaminated scrubbing liquid stream, wherein there is a diffuser disposed within the diverging section, the diffuser configured to be adjustable within the diverging section, wherein the diffuser is configured to reduce the pressure drop experienced by the mixed stream within the diverging section as compared to the diverging section having an absence of the diffuser; removing said contaminated scrubbing liquid stream from said supersonic venture scrubber; and introducing said essentially pure gas stream said diverging section.