公开(公告)号：EP2586517B1

公开(公告)日：2015-08-26

申请号：EP12190312.4

申请日：2012-10-29

申请人： Mitsubishi Hitachi Power Systems, Ltd.

发明人： Okamoto, Takuya ,  Nagayasu, Tatsuto ,  Nakamura, Satoshi

IPC分类号： B01D53/14 ,  B01D53/50 ,  B01D53/78 ,  B01D53/80 ,  F23J15/04

CPC分类号： F23J15/04 ,  B01D53/501 ,  B01D53/502 ,  B01D53/78 ,  B01D53/80 ,  B01D2251/206 ,  B01D2251/304 ,  B01D2251/306 ,  B01D2251/402 ,  B01D2251/404 ,  B01D2257/404 ,  B01D2257/504 ,  B01D2258/0283 ,  F23J2215/20 ,  F23J2219/50 ,  Y02A50/2348 ,  Y02E20/326

摘要： A flue gas desulfurization (10) according to the present invention includes a desulfurization absorber (11) that removes SOx and dust contained in flue gas (17), spray pipes (12) that are provided in the desulfurization absorber 11), an absorbent feeding means (13) that feeds an absorbing-agent-slurry containing absorbent (21), in which limestone is used as an absorbing agent, into the desulfurization absorber (11), nozzles (14) that are provided in the spray pipe 12 to spray the absorbent (21) into the desulfurization absorber (11), an alkaline-agent feeding means (15) that feeds an alkaline-agent containing solution (44) into the desulfurization absorber (11), and an waste-water discharge pipe (16) for discharging filtrate (55) obtained by solid-liquid separating the absorbent (21) discharged from the desulfurization absorber (11) as waste water (58). A feed amount of the alkaline-agent containing solution (44) into the desulfurization absorber (11) is adjusted based on a discharge amount of the waste water (58).