[특허]Control of NOx reduction in flue gas flows

Control of NOx reduction in flue gas flows 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F23D-015/00
출원번호	US-0933488 (1992-08-20)
발명자 / 주소	Krigmont Henry V. (Seal Beach CA) Kozacka Wayne R. (Laguna Hills CA) Spokoyny Felix E. (Costa Mesa CA)
출원인 / 주소	Wahlco Environmental Systems, Inc. (Santa Ana CA 02)
인용정보	피인용 횟수 : 51 인용 특허 : 0

초록 ▼

The NOx content in a flow of flue gas is reduced by passing the flue gas through a first treatment zone and a second treatment zone. A nitrogeneous treatment agent is introduced into the first treatment zone for the selective non-catalytic reduction of part of the NOx, and the flue gas is thereafter passed through the second treatment zone which includes a catalyst for further selective catalytic reduction of the NOx. Optionally, a second nitrogeneous treatment agent is added to the flue gas in the second treatment zone. The quantity of NOx in the flue gas is detected intermediate the first and second treatment zones and, optionally, after the flue gas has left the second treatment zone. The quantity of ammonia in the flue gas exiting from the second treatment zone is also detected. The amounts of the treatment agents added to the flue gas are controlled responsive to the variations and absolute levels determined by these measurements.

대표청구항 ▼

A method of reducing NOx from a flow of flue gas produced by a burner, comprising the steps of: passing the flue gas through a first treatment zone; substantially simultaneously with said passing, selectively introducing a nitrogeneous treatment agent into the first treatment zone for the selective non-catalytic reduction of a first portion of the NOx from the flue gas passing through the first treatment zone, said introducing including an excessive amount of such nitrogeneous treatment agent above that required for such non-catalytic reduction of the first portion; passing the flue gas, containing such excessive amount of the nitrogeneous treatment agent, through a second treatment zone which includes a catalyst therein, wherein a second portion of the NOx within the flue gas is removed therefrom as a result of a reaction thereof with such nitrogeneous treatment agent or its derivatives in the presence of the catalyst; detecting the quantity of NOx in the flue gas intermediate the first and second treatment zones; detecting the quantity of ammonia in the flue gas exiting from the second treatment zone; increasing the quantity of nitrogeneous treatment agent introduced into the first treatment zone in response to said first and second mentioned detecting, so long as the following criteria are being met, A. the quantity of NOx indicated at said first mentioned detecting is generally decreasing with an increasing addition of the nitrogeneous treatment agent, and B. the quantity of ammonia detected at said second mentioned detecting is generally below a predetermined maximum limit.

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Spokoyny Felix E., Method and apparatus for reducing "ammonia slip" in SCR and/or SNCR NOX removal applications.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Control of NOx reduction in flue gas flows 원문보기

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Control of NOx reduction in flue gas flows 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (51)

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