Waste heat recovery boiler

Patent · Tue Sep 15 04:00:00 EDT 1987

OSTI ID:5962826

Yanai, E; Kuribayashi, T

A waste heat recovery boiler is described which utilizes an exhaust gas of a gas turbine and generates steam for driving a steam turbine. The improvement wherein at least two denitrating devices for removing NO/sub x/ components in the exhaust gas therefrom are disposed inside the waste heat recovery boiler. The waste heat recovery boiler is equipped with fuel economizers for preheating feed water by the exhaust gas, rear and front evaporators for evaporating the pre-heated feed water, a superheater for heating the vaporized feed water and generating the driving steam for the steam turbine, all of the constituent members being disposed sequentially from a downstream side to an upstream side of the exhaust gas, and wherein the denitrating devices are disposed between at least two evaporators and between the front evaporator and the superheater.

• Assignee: Hitachi, Ltd., Tokyo
• Patent Number(s): US 4693213
• OSTI ID: 5962826
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200103* -- Fossil-Fueled Power Plants-- Waste-Fueled Systems
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DENITRATION
DENITRIFICATION
DESIGN
EMISSION
ENERGY RECOVERY
EQUIPMENT
EVAPORATORS
EXHAUST GASES
FLUIDS
FUEL ECONOMY
FUEL SYSTEMS
GAS TURBINES
GASEOUS WASTES
GASES
HEAT RECOVERY
MACHINERY
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RECOVERY
REMOVAL
STEAM GENERATION
STEAM TURBINES
SUPERHEATERS
TURBINES
TURBOMACHINERY
WASTE HEAT BOILERS
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES