发明名称 |
Catalytic combustor with lean direct injection of gas fuel for low emissions combustion and methods of operation |
摘要 |
A combustor for a gas turbine includes a diffusion flame combustion zone, a catalytic combustion zone and a post-catalytic combustion zone. At start-up or low-load levels, fuel and compressor discharge air are supplied to the diffusion flame combustion zone to provide combustion products for the turbine. At mid-range operating conditions, the products of combustion from the diffusion flame combustion zone are mixed with additional hydrocarbon fuel for combustion in the presence of a catalyst in the catalytic combustion zone. Because the fuel/air mixture in the catalytic reactor bed is lean, the combustion reaction temperature is too low to produce thermal NOx. Under high-load conditions, a lean direct injection of fuel/air is provided in a post-catalytic combustion zone where auto ignition occurs with the reactions going to completion in the transition between the combustor and turbine section. In the post-catalytic combustion zone, the combustion temperature is low and the residence time in the transition piece is short, hence minimizing thermal NOx.
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申请公布号 |
US5826429(A) |
申请公布日期 |
1998.10.27 |
申请号 |
US19950575809 |
申请日期 |
1995.12.22 |
申请人 |
GENERAL ELECTRIC CO. |
发明人 |
BEEBE, KENNETH W.;HUNG, STEPHEN L.;CUTRONE, MARTIN B. |
分类号 |
F02C7/228;F02B51/02;F02C9/28;F02G3/00;F02K3/10;F23C6/04;F23C13/00;F23C99/00;F23N1/00;F23R3/20;F23R3/26;F23R3/28;F23R3/34;F23R3/40;(IPC1-7):F02C1/00 |
主分类号 |
F02C7/228 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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