[특허]Low NOx <B>cogeneration process and system

Low NOx cogeneration process and system 원문보기

IPC분류정보

국가/구분 United States(US) Patent 등록

국제특허분류(IPC7판)

F01N-003/18

출원번호 US-0907122 (1992-07-01)

발명자 / 주소

Bell Ronald D. (Austin TX)

출원인 / 주소

Radian Corporation (Austin TX 02)

인용정보 피인용 횟수 : 32 인용 특허 : 0

초록 ▼

A process and system for low NOx cogeneration to produce electricity and useful heat. Fuel and oxygen are provided to an internal combustion engine connected to drive an electric generator, to thereby generate electricity. An exhaust stream is recovered from the engine at a temperature of about 500°

A process and system for low NOx cogeneration to produce electricity and useful heat. Fuel and oxygen are provided to an internal combustion engine connected to drive an electric generator, to thereby generate electricity. An exhaust stream is recovered from the engine at a temperature of about 500°to 1000°F. which includes from about 6 to 15 percent oxygen. Fuel is added to the exhaust stream to create a fuel-rich mixture, the quantity of fuel being sufficient to react with oxygen and reduce the NOx in said exhaust stream. The fuel-enriched stream is provided to an afterburner, and the fuel, NOx and available oxygen are reacted to provide a heated oxygen-depleted stream. The oxygen-depleted stream is cooled in a first heat exchanger. Conversion oxygen is admixed with the cooled stream which is then passed over a catalyst bed under overall reducing conditions. NO is converted to NO2 at the forward end of the bed, and the NO2 then reacts on the remainder of the bed with excess combustibles. The stream from the reducing catalyst bed is cooled from a temperature of 750°to 1250° F. to about 450°to 650°F. and air is added to produce a further cooled stream at 400°to 600°F. having a stoichiometric excess of oxygen, and the further cooled stream is passed over an oxidizing catalyst bed to oxidize remaining combustibles. The resultant low NOx stream can then be provided for venting.

대표청구항 ▼

A process for low NOx cogeneration to produce electricity and useful heat, which comprises: providing fuel and oxygen to an internal combustion engine connected to drive an electric generator, to thereby generate electricity; recovering from said engine an exhaust stream including elevated NOx level

A process for low NOx cogeneration to produce electricity and useful heat, which comprises: providing fuel and oxygen to an internal combustion engine connected to drive an electric generator, to thereby generate electricity; recovering from said engine an exhaust stream including elevated NOx levels and combined oxygen; adding to said exhaust stream sufficient fuel to create a fuel-rich mixture, the quantity of fuel being sufficient to react with the available oxygen and reduce the NOx in said exhaust stream; providing said fuel-enriched exhaust stream to a thermal reactor and reacting therein said fuel, NOx and available oxygen, to provide a heated oxygen-depleted stream; cooling said oxygen-depleted stream by passing same through a first heat exchanger; adding conversion oxygen to said cooled stream from said heat exchanger, and passing the cooled oxygen-augmented stream over a first catalyst bed operated at a temperature of about 750°to 1250°F. under overall reducing conditions, the quantity of conversion oxygen added being in stoichiometric excess of the amount of NOx, but less than the amount of combustibles; whereby the NOx is first oxidized to NO2, and then the NO2 is reduced by the excess combustibles; cooling said stream from said first catalyst bed to a temperature of about 450°to 650°F. by passing said stream through a second heat exchanger; adding air to the resulting cooled stream to produce a further cooled stream at a temperature of about 400°to 600°F., and having a stoichiometric excess of oxygen; and passing said stream having said stoichiometric excess of oxygen over an oxidizing catalyst bed at said temperature of 400°to 600°F. to oxidize remaining excess combustibles, to thereby provide an effluent stream having environmentally safe characteristics.

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국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F01N-003/18
출원번호	US-0907122 (1992-07-01)
발명자 / 주소	Bell Ronald D. (Austin TX)
출원인 / 주소	Radian Corporation (Austin TX 02)
인용정보	피인용 횟수 : 32 인용 특허 : 0

내보내기 구분	파일저장 인쇄 메일전송
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