TREATMENT OF EXHAUST GASES
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专利名称：TREATMENT OF EXHAUST GASES
发明人：OOTA MASAO,KAMIGUCHI TAIJI,ARITA SHINTAROU,MIURA KAZUO
申请号：JP11517077
申请日：19770927
公开号：JPS5448678A
公开日：
19790417
专利内容由知识产权出版社提供
摘要：PURPOSE:To effectively denitrify a comparatively low temperature exhaust gas containing NOx at lower cost by evaporating or sublimating liquid or solid reducing agent by divided exhaust gas of more than a specific temperature and then by sending back the reducing agent-containing exhaust gas to exhaust gas for the reducing treatment of the exhaust gas. CONSTITUTION:The gas emission source 11, as, for example, of the 300 to 350 deg.C combustion exhaust gas from boilers etc., is introduced through the flue 1 into the heat exchanger 20 consisting of an air preheater, etc., and then introduced, after being deprived of its heat there to approx. 150 deg.C, into the denitrification reactor 30 through the flue 21. On the other hand, a part of the exhaus gas is sent to the tube 12 and then introduced to the reducing agent- charging device 40. The exhaust gas containing the vapors of urea, hydrazine, etc., vaporized by the heat of the exhaust gas is mixed with the exhaust gas after being heat-exchanged at the pipe 41, and then intruduced into the denitrification reactor 30, where NOx present in the exhaust gas is reduced into N2 as harmless gas at a low temperature of approx. 150 to 200 deg.C in the presence of an oxide catalyst, e.g., of V, Fe, Cr, Mo, etc.
申请人：BABCOCK HITACHI KK
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