F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
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F01N 3/10 (2006.01) B01D 53/86 (2006.01) F02C 3/30 (2006.01) F02C 6/18 (2006.01) F22B 1/18 (2006.01) F22B 35/00 (2006.01) F22B 37/00 (2006.01) F23J 15/00 (2006.01)
Patent
CA 1143659
14 48,471 ABSTRACT OF THE DISCLOSURE In a single cycle combustion turbine power plant, a dry catalytic NOx removal module is disposed in the turbine exhaust stack. A waste heat exchanger system includes an economizer coil and a pair of evaporator coils on upstream and downstream sides of the NOx removal module to generate steam for injection into the turbine combus- tors. Bypass stacks across the coils are damper con- trolled to regulate the exhaust gas temperature at the entry to the NOx removal module. The compressor inlet guide vanes are closed to increase exhaust gas temperature as required after the upstream evaporator bypass flow reaches zero and no longer controls gas temperature. If the inlet guide vanes reach the fully closed position, reductant injection flow is shut off to terminate the NOx removal process under low exhaust gas temperature condi- tions. A plant afterburner is operated to add heat to the exhaust gas if gas temperature is too low.
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