EXHAUST GAS TREATMENT DEVICE, COMBUSTION FACILITY, POWER-GENERATING FACILITY, AND EXHAUST GAS TREATMENT METHOD

Title:

EXHAUST GAS TREATMENT DEVICE, COMBUSTION FACILITY, POWER-GENERATING FACILITY, AND EXHAUST GAS TREATMENT METHOD

Document Type and Number:

WIPO Patent Application WO/2023/210071

Kind Code:

A1

Abstract:

This exhaust gas treatment device comprises: a first reducing catalyst that is provided in a flow path for combustion exhaust gas from fuel and accelerates reaction to reduce a certain substance included in the combustion exhaust gas; a reducing agent supply part that is provided on the upstream side of the first reducing catalyst and supplies a reducing agent for reducing the certain substance in the combustion exhaust gas; a reducing agent lessening catalyst that is provided on the downstream side of the first reducing catalyst in the flow path and lessens the reducing agent in the combustion exhaust gas; at least one second reducing catalyst that is provided on the downstream side of the reducing agent lessening catalyst in the flow path and accelerates reaction to reduce the certain substance; a first concentration measurement part that measures a first concentration which is the concentration of the certain substance in the combustion exhaust gas at a position located downstream of the first reducing catalyst and upstream of the reducing agent lessening catalyst in the flow path; a second concentration measurement part that measures a second concentration which is the concentration of the certain substance in the combustion exhaust gas at a position located downstream of the reducing agent lessening catalyst in the flow path; and a determination part configured to determine, on the basis of the first concentration and second concentration of the certain substance, whether to increase or decrease the supply amount of the reducing agent supplied from the reducing agent supply part.

Inventors:

NOCHI KATSUMI (JP)
KAKO HIROSHI (JP)
MASUDA TOMOTSUGU (JP)
KAI KEIICHIRO (JP)
YOSHIMURA HIROYUKI (JP)

Application Number:

PCT/JP2023/001089

Publication Date:

November 02, 2023

Filing Date:

January 17, 2023

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD (JP)
MITSUBISHI POWER LTD (JP)

International Classes:

B01D53/90; B01D53/86; F01N3/08; F23J15/00

Domestic Patent References:

WO2010079621A1

2010-07-15

Foreign References:

JPH0975674A	1997-03-25
JP2009079539A	2009-04-16
JPH04200619A	1992-07-21
JP2008255899A	2008-10-23
JP2012062818A	2012-03-29
JPH0838856A	1996-02-13
JP2000093749A	2000-04-04

Attorney, Agent or Firm:

SSIP PATENT ATTORNEY CORPORATION (JP)

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