Power plants – Combustion products used as motive fluid – Multiple fluid-operated motors
Patent
1980-08-20
1982-10-12
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Multiple fluid-operated motors
122 7B, F02C 618
Patent
active
043532071
ABSTRACT:
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 NO.sub.x removal module to generate steam for injection into the turbine combustors. Bypass stacks across the coils are damper controlled 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 conditions. A plant afterburner is operated to add heat to the exhaust gas if gas temperature is too low.
REFERENCES:
patent: 3900554 (1975-08-01), Lyon
patent: 4106286 (1978-08-01), Sakai et al.
patent: 4160805 (1979-07-01), Inaba et al.
Atsukawa et al., "Development of NOx Removal Processes with Catalyst for Stationary Combustion Facilities". MTB 124, May.
Hishinumo et al., "NOx Removal Process by Injection of NH.sub.3 and H.sub.2 O in Gas Turbine Exhaust Gas", ASME 79-GT-G9, Mar., 1979.
Saleen et al., "Hitachi Zosen DENO.sub.x Process for Fossil Fuel Fired Boilers".
Casaregola Louis J.
Possessky E. F.
Westinghouse Electric Corp.
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