Patent ID: 7780856

Claim:
A device for on-line light radiation in gas-containing liquid comprising: a gas-liquid mixer comprising: a liquid inlet through which a liquid is introduced in; a gas inlet through which a gas is sucked in and mixes with said liquid such that at least part of said gas is dissolved in said liquid to produce a gas-liquid mixture; and a gas-liquid outlet through which said gas-liquid mixture flows out; a gas-liquid separator comprising; a conduit provided inside said gas-liquid separator with a lower end thereof connected to said gas-liquid outlet of said gas-liquid mixer and an upper end thereof extending to near a top of said gas-liquid separator, a top of said upper end being sealed and multiple pores being formed near said top of said upper end; an outlet disposed near a bottom of said gas-liquid separator; and a gas-release valve disposed near said top of said gas-liquid separator; multiple lamps disposed coaxially inside protective sheaths transparent to light respectively, said protective sheaths being disposed inside said gas-liquid separator, placed around and generally parallel to said conduit, and fixed on said bottom of said gas-liquid separator; and a washing assembly for removing accretions on said protective sheaths, said washing assembly comprising: at least one holder having plural through holes and a center hole allowing said conduit of gas-liquid separator to pass through, each of said plural through holes having a scraper mechanism therein for scraping said accretions on each of said protective sheaths, through said scraper mechanism, each of said protective sheaths passing through; and means for driving said at least one holder to move axially along said protective sheaths; wherein said gas-liquid mixture together with an un-dissolved gas are drawn into said conduit of said gas-liquid separator from said gas-liquid outlet of said gas-liquid mixer and said gas-liquid mixture is sprayed against an inner wall of said gas-liquid separator through said multiple pores of said upper end of said conduit where said un-dissolved gas is separated from said gas-liquid mixture and remains near said top of said gas-liquid separator and creates a partial pressure of gas, which is adjustable by said gas-release valve of said gas-liquid separator while said gas-liquid mixture flows downwardly and is radiated by said multiple lamps and then flows out from said outlet of said gas-liquid separator.