发明名称 |
Removal of oxides of nitrogen from gases in multi-stage coal combustion |
摘要 |
Polluting NOx gas values are removed from off-gas of a multi-stage coal combustion process which includes an initial carbonizing reaction, firing of char from this reaction in a fluidized bed reactor, and burning of gases from the carbonizing and fluidized bed reactions in a topping combustor having a first, fuel-rich zone and a second, fuel-lean zone. The improvement by means of which NOx gases are removed is directed to introducing NOx-free oxidizing gas such as compressor air into the second, fuel-lean zone and completing combustion with this source of oxidizing gas. Excess air fed to the fluidized bed reactor is also controlled to obtain desired stoichiometry in the first, fuel-rich zone of the topping combustor.
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申请公布号 |
US5706645(A) |
申请公布日期 |
1998.01.13 |
申请号 |
US19960635422 |
申请日期 |
1996.04.10 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES DEPARTMENT OF ENERGY |
发明人 |
MOLLOT, DARREN J.;BONK, DONALD L.;DOWDY, THOMAS E. |
分类号 |
F02C3/20;F02C3/28;F23R3/34;(IPC1-7):F02C3/28 |
主分类号 |
F02C3/20 |
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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