Waste heat recovery boiler

Patent · Tue Aug 21 04:00:00 EDT 1984

OSTI ID:6317230

Taiji Inui, H; Makoto Sasaki, M

A waste heat recovery boiler for generating steam by utilizing a flue gas discharged from a gas turbine as a heat source comprises an economizer for preheating feedwater by the flue gas, an evaporator for evaporating the preheated feedwater, and a superheater for generating a steam for driving a steam prime mover by heating the evaporated feedwater. The economizer, the evaporator and the superheater are successively arranged in the direction from a downstream side to an upstream side of flue gas passage. The evaporator itself is divided into two sections and an apparatus for removing NO /SUB x/ is provided in a space between the divided two sections of the evaporator in the flue gas passage to remove NO /SUB x/ from the flue gas. An NO /SUB x/ concentration of a flue gas discharged from a combined cycle power plant including the gas turbine can be stably abated at any of full and partial loads.

• Assignee: Hitachi Ltd. (Japan)
• Patent Number(s): US 4466241
• OSTI ID: 6317230
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200105* -- Fossil-Fueled Power Plants-- Heat Utilization
AIR POLLUTION ABATEMENT
BOILERS
COMBINED-CYCLE POWER PLANTS
DESIGN
ENERGY RECOVERY
EQUIPMENT
EVAPORATORS
FLUE GAS
GAS TURBINES
GASEOUS WASTES
HEAT RECOVERY
MACHINERY
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
RECOVERY
STEAM GENERATION
STEAM GENERATORS
SUPERHEATERS
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
VAPOR GENERATORS
WASTE HEAT BOILERS
WASTES