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Title:
EXHAUST-GAS TREATMENT DEVICE AND EXHAUST-GAS TREATMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2011/145534
Kind Code:
A1
Abstract:
Disclosed are an exhaust-gas treatment device and an exhaust-gas treatment method that allow stable operation over long periods of time. The disclosed exhaust-gas treatment device (100), which removes SO3 from a combustion exhaust gas, is provided with: a spray means (140) which sprays an aqueous solution containing a dissolved salt into a flue (130) upstream of a wet desulfurization device (114); and wall-cleaning piping (160), along the walls of the flue (130) in the circumferential direction thereof, which supplies wall-cleaning water to the walls of the flue, thereby forming a liquid film of said wall-cleaning water across the entire surface of the region of the flue (130) to which the aforementioned dissolved salt becomes attached. In the disclosed exhaust-gas treatment method, which removes SO3 from a combustion exhaust gas, an aqueous solution containing a dissolved salt is sprayed into a flue (130) upstream of a wet desulfurization device (114), and wall-cleaning water is supplied to the walls of the flue (130), thereby forming a liquid film of said wall-cleaning water across the entire surface of the region of the flue (130) to which the aforementioned dissolved salt becomes attached.

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Inventors:
HAMAGUCHI RYOKICHI (JP)
NAGAYASU HIROMITSU (JP)
UEDA YASUTOSHI (JP)
NOGUCHI TOSHIHIDE (JP)
KAGAMI MORIO (JP)
Application Number:
PCT/JP2011/061105
Publication Date:
November 24, 2011
Filing Date:
May 13, 2011
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND MECHATRONICS SYSTEMS LTD (JP)
HAMAGUCHI RYOKICHI (JP)
NAGAYASU HIROMITSU (JP)
UEDA YASUTOSHI (JP)
NOGUCHI TOSHIHIDE (JP)
KAGAMI MORIO (JP)
International Classes:
B01D53/50; B01D53/18; B01D53/77
Foreign References:
JP2006326575A2006-12-07
JPS50119637U1975-09-30
JPS5183075A1976-07-21
JP2007296447A2007-11-15
Attorney, Agent or Firm:
FUJITA, Takaharu et al. (JP)
Takaharu Fujita (JP)
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Claims:



 
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