Patent ID: 6174498
Filing Date: 2001-01-16
Classification: B01D,Y10S

Abstract:
A system for removing unwanted constituents from a gas stream, comprising:an unitary housing, said housing having, at an upstream end thereof, an inlet for receiving a gas stream carrying unwanted constituents, and having, at a downstream end thereof, an outlet for the exhaustion to atmosphere of a gas stream which has been cleaned while passing through said housing, said housing further having a wall disposed inside thereof between said upstream end and said downstream end, said wall forming first and second chambers, between said upstream end and said downstream end respectively, said wall having a height less than the height of said formed chambers, said chambers being in series fluid communication for confining a gas stream for pretreatment in said first chamber and subsequent treatment in said second chamber and for passing the gas stream from the inlet of said upstream end toward said downstream end and out the outlet thereof, wherein said gas stream flows over said wall, and directly into said second chamber, thereby changing direction of gas flow whereby said direction of flow in one of said chambers is opposite to the direction of flow in the other one of said chambers, said housing further having first and second sumps forming a bottom of said housing and being in fluid communication with said first and second chambers, respectively, each of said first and second sumps containing an aqueous reagent solution for the treatment of the gas stream flowing through said system;means for delivering, from said first and second sumps, respectively, an aqueous reagent solution, to said first and second chambers, to thereby treat the gas stream flowing therethrough, wherein one portion of said aqueous reagent solution reacts chemically with unwanted constituents in the gas stream to produce reaction products removing unwanted constituents from the gas stream and another portion of said aqueous reagent solution remains unreacted, and wherein the reaction products and the unreacted aqueous reagent solution are collected in said first and second sumps by being returned thereto from said first and second chambers, respectively;means located external to said housing for delivering reagent to said first and second chambers to augment the aqueous reagent solution being delivered by said delivering means; andmeans fluid coupling said first and second sumps for delivering unreacted aqueous reagent solution from one of said first and second sumps to the other one of said first and second sumps for combining with the unreacted aqueous reagent solution in the other one of said first and second sumps, whereby the combined unreacted aqueous reagent solution is recycled by said means for delivering to said first chamber, to thus remove unwanted constituents from the gas stream flowing through said system.