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Patent Searching and Data


Title:
DINITRIFCATION APPARATUS FOR COAL FIRED BOILER
Document Type and Number:
WIPO Patent Application WO/2019/054108
Kind Code:
A1
Abstract:
The purpose of the present invention is to achieve uniform diffusion of jetted ammonia gas without lengthening the duct. A denitrification apparatus (1) for a coal fired boiler is provided with a curved duct (20) having a bend section (24) that curves a portion of a flow channel through which exhaust gas flows; and a catalytic reactor (40) connected to the outlet of the curved duct (20), the flow channel of which is provided with a rectifying device (42) with multiple parallel plates, ammonia injection nozzles (44) for jetting ammonia gas, and a catalyst layer (46) and comprises a portion in which the cross-sectional area of the flow channel is roughly constant. The rectifying device (42) and the ammonia injection nozzles (44) are disposed at the inlet of said portion of the catalytic reactor (40) in which the cross-sectional area of the flow channel is roughly constant, located upstream of the catalyst layer (46), and the ammonia injection nozzles (44) are set immediately downstream of the rectifying device (42) so as to continue from the rectifying device (42).

Inventors:
MIYANISHI HIDEO (JP)
ODA MANABU (JP)
TSUTSUMI RYUJI (JP)
TODAKA SHIMPEI (JP)
Application Number:
PCT/JP2018/030008
Publication Date:
March 21, 2019
Filing Date:
August 10, 2018
Export Citation:
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Assignee:
MITSUBISHI HITACHI POWER SYS (JP)
International Classes:
B01D53/86; B01D53/90
Domestic Patent References:
WO2012060378A12012-05-10
Foreign References:
JPH1057770A1998-03-03
JPS5364103A1978-06-08
JPH07213857A1995-08-15
JP2005140370A2005-06-02
JPH0924246A1997-01-28
Other References:
See also references of EP 3628395A4
Attorney, Agent or Firm:
FUJITA, Takaharu (JP)
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