Summary: Introduced sparge to come back shed flue gasRemove dust desulphurizationThe working principle of unifinication technology and main function index, the basis uses a case on boiler of 2.8 ～ 52MW, mix to technical key solved a way to undertake an analysis. Keyword: Sparge comes back stream remove dust the graph in desulphurization classifies date: X701.3 document label piles up: B article number: 1006-8759(2003)02-0023-02

Bedding face of quantity of boiler of our country industry is wide. According to not complete count, ＊ of boiler of countrywide existing industry contains heating boiler more than 430 thousand, year bad news coal - more than 100000000 tons, it is generation our country is fuliginous model one of main source of pollution. In last few years, of the development as economy and environmental protection strength strengthen, common tornado doing typeDust catcherAlready was washed out, in " two control an area " inside, environmental protection branch asks installation removes dust mostly desulphurization unifinication equipment. Be aimed at the characteristic of boiler of our country industry and environmental protection requirement, institute of environmental protection of Hangzhou of coal division total courtyard developed the sparge with practical economy to come back shed flue gas to remove dust desulphurization unifinication technology. It already but with new boiler form a complete set, also can have through be oppositeWater film dust catchertransform implementation. This technology already applied extensively on boiler of 2.8 ～ 52MW and capture national level new certificate of products. Sparge of 1 job principle comes back shed flue gas to remove dust technological process of desulphurization unifinication technology pursues as follows: Flue gas enters pulverization to absorb above all implement, pulverization absorbs fluid and flue gas to mix a contact adequately, SO2 is absorbed fluid is absorbed, soot by wet, agglomeration; Next, the flue gas that purifies via first time from bottom tangential enter absorb a tower, below the action of centrifugal force soot grain swings Xiang Dabi, be caught by water film collect, partial SO2 also is absorbed by water film, at the same time implementation enrages fluid / gas firm is detached. Flue gas by air inlet duct from bottom tangential enter absorb a tower, below the action of centrifugal force soot grain swings Xiang Dabi, be caught by water film collect, partial SO2 also is absorbed by water film; The flue gas that purifies through the first class is in tailor-made come back stream absorb board make flue gas shows helix to rise below action, absorbing board on make the size of from above to below forms eject to rouse bubble layer, flue gas and size are contacted upstream, soot support is inertial collision, drip washing and coagulate and wait for action to be caught further by size collect, be absorbed 2 times by size in process of eject beat bubble. The alkalescent ion such as the K that contains in the soot that be divided, Na, Ca2; goes to the effect that absorbs SO2 since Yi Ke. When serous PH the value falls to design a value (6.0~7.0) when, put broken bits liquid to sedimentation basin or grey water segregator by cuttings pick-up mouth, join absorbefacient in circular pool again. Remove dust fan protector is entered after the demist of flue gas classics after desulphurization, next by bring fan to emit into chimney.
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