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Title:
EXHAUST GAS TREATMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/235657
Kind Code:
A1
Abstract:
In the present invention, exhaust gas from a boiler 1 passes through an exhaust gas channel 4. A desulfurization tower 2 removes sulfur oxide from the exhaust gas. A desulfurization gas channel 10 has a desulfurization inlet side channel 11 that connects a branching section 6 of the exhaust gas channel 4 to an exhaust gas inlet 8 of the desulfurization tower 2, and a desulfurization outlet side channel 12 that connects an exhaust gas outlet 9 of the desulfurization tower 2 to a merging section 7 of the exhaust gas channel 4. Desulfurization gas channel dampers 20, 21 can open and close the desulfurization gas channel 10. A desulfurization ventilator 22 causes the exhaust gas to flow in the desulfurization gas channel 10 so that some of the exhaust gas passing through the exhaust gas channel 4 is guided from the branching section 6 to the desulfurization tower 2 and returns to the exhaust gas channel 4 from the merging section 7 in a state in which the desulfurization gas channel dampers 20, 21 are in a desulfurization gas channel open state to open the desulfurization gas channel 10.

Inventors:
NISHIYAMA SAKI (JP)
KAJIKAWA KAZUHIKO (JP)
KOHATA KOZO (JP)
KATAGAWA ATSUSHI (JP)
Application Number:
PCT/JP2020/020196
Publication Date:
November 26, 2020
Filing Date:
May 21, 2020
Export Citation:
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Assignee:
MITSUBISHI HITACHI POWER SYS (JP)
International Classes:
B01D53/14; B01D53/50; B01D53/78; F23J15/00; F23J15/08
Foreign References:
JP2015208738A2015-11-24
JPH0828855A1996-02-02
JPH06182148A1994-07-05
CN103591599A2014-02-19
Attorney, Agent or Firm:
YONEYAMA Hisashi et al. (JP)
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