公开(公告)号：EP2357331A1

公开(公告)日：2011-08-17

申请号：EP09831864.5

申请日：2009-12-04

申请人： Mitsubishi Heavy Industries, Ltd.

发明人： TANOURA, Masazumi ,  MUTA, Kenji ,  DANNO, Minoru ,  KATSUKI, Masatoshi ,  UJIHARA, Yuuko ,  UENO, Daishi ,  FUJINAGA, Takasji ,  KATO, Eiji ,  ASAMI, Shinichiro ,  AOKI, Tadashi

IPC分类号： F01N3/08 ,  B01D53/86 ,  B01D53/94 ,  F01N3/20 ,  F01N3/28

CPC分类号： F01N3/208 ,  B01D53/90 ,  B01D53/9477 ,  B01D53/9495 ,  B01D2251/2067 ,  B01D2255/1021 ,  B01D2255/50 ,  F01N3/035 ,  F01N3/105 ,  F01N3/2006 ,  F01N3/2013 ,  F01N3/2046 ,  F01N11/00 ,  F01N2550/02 ,  F01N2550/22 ,  F01N2560/02 ,  F01N2560/021 ,  F01N2560/026 ,  F01N2560/14 ,  F01N2610/02 ,  F01N2900/1402 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/26

摘要： An object of the present invention is to provide a flue gas purifying device that can suppress leakage of ammonia and can efficiently nitrogen- oxides in flue gas. The object is achieved by a flue gas purifying device including: an exhaust pipe; a urea-water injecting unit that injects urea water into the exhaust pipe; a catalytic unit that includes a urea SCR catalyst that promotes a reaction between ammonia and nitrogen oxides and a support mechanism that supports the urea SCR catalyst in the exhaust pipe, and is arranged on a downstream side to a position where urea water is injected; a concentration measuring unit arranged on a downstream side to the catalytic unit in a flow direction of flue gas to measure an ammonia concentration in flue gas having passed through the urea SCR catalyst; and a control unit that controls injection of urea water by the urea-water injecting unit based on an ammonia concentration measured by the concentration measuring unit.

摘要翻译： 本发明的目的是提供一种烟气净化装置，其能够抑制氨的泄漏并且可以有效地对烟气中的氮氧化物进行抑制。 该目的通过一种烟气净化装置来实现，该烟气净化装置包括：排气管; 尿素水注入单元，其将尿素水注入排气管; 催化单元，其包括促进氨和氮氧化物之间的反应的尿素SCR催化剂和支撑所述排气管中的所述尿素SCR催化剂的支撑机构，并且被布置在注入尿素水的位置的下游侧; 浓度测量单元，所述浓度测量单元沿烟道气的流动方向布置在所述催化单元的下游侧，以测量已经通过所述尿素SCR催化剂的烟道气中的氨浓度; 以及控制单元，其基于由浓度测量单元测量的氨浓度来控制由尿素水喷射单元喷射尿素水。