Apparatus for removing NOx and for providing better plant efficiency in simple cycle combustion turbine plants
Patent
·
OSTI ID:6655047
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 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.
- Assignee:
- Westinghouse Electric Corp
- Patent Number(s):
- US 4353207
- OSTI ID:
- 6655047
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AFTERBURNERS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
CONTROL EQUIPMENT
DESIGN
DRAFT CONTROL SYSTEMS
EFFICIENCY
EQUIPMENT
EVAPORATORS
EXHAUST GASES
FLOW REGULATORS
FLUID FLOW
FLUIDS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
GASES
HEAT EXCHANGERS
INJECTION
INTAKE
MACHINERY
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
POWER GENERATION
POWER PLANTS
REMOVAL
STEAM TURBINES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AFTERBURNERS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
CONTROL EQUIPMENT
DESIGN
DRAFT CONTROL SYSTEMS
EFFICIENCY
EQUIPMENT
EVAPORATORS
EXHAUST GASES
FLOW REGULATORS
FLUID FLOW
FLUIDS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
GASES
HEAT EXCHANGERS
INJECTION
INTAKE
MACHINERY
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
POWER GENERATION
POWER PLANTS
REMOVAL
STEAM TURBINES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES