Combined heat recovery and emission control system

Patent · Tue Feb 25 04:00:00 EST 1986

OSTI ID:5775274

Haeflich, J

This patent describes a cogeneration plant having a gas turbine engine, an electric generator driven by the engine and a combined heat recovery and emission control system for the recovery of heat from and reduction of pollutants in the exhaust gas stream from the engine. The combined system consists of: steam boilers, each having at least one bank of steam generating tubes, a steam conduit system having a first steam header for supplying steam at a first preselected nominal pressure, an emission control unit for reducing pollutants in the exhaust gas stream by chemical conversion. A duct for conducting the exahust gas stream through the banks of steam generating tubes and the emission control unit. The steam boilers consist of a first steam boiler having its bank of steam generating tubes upstream of the emission control unit and a second steam boiler having its bank of steam generating tubes downstream of the emission control unit. The first and second steam boilers are connected for supplying steam to the steam conduit system. The improvement in the first steam boiler is an exhaust gas temperature regulating boiler having a first, exhaust gas temperature responsive, boiler control system for regulating the supply of steam from the first steam boiler to the steam conduit system in accordance with the temperature of the exhaust gas stream at the emission control unit. This is done in order to vary the operating pressure of the first steam boiler, and thereby vary the temperature and heat exchange rate of the bank of steam generating tubes of the first steam boiler and to maintain the exhaust gas stream at the emission control unit at a preestablished desired nominal temperature for chemical conversion.

• Assignee: Energy Services Inc., Farmington, CT
• Patent Number(s): US 4572110
• OSTI ID: 5775274
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330103* -- Internal Combustion Engines-- Turbine
330700 -- Advanced Propulsion Systems-- Emission Control
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
BOILERS
CONTROL
CONTROL SYSTEMS
DUAL-PURPOSE POWER PLANTS
DUCTS
ELECTRIC GENERATORS
EMISSION
ENERGY RECOVERY
ENERGY TRANSFER
ENGINES
EQUIPMENT
EXHAUST GASES
FLUID FLOW
FLUIDS
GAS FLOW
GAS TURBINE ENGINES
GASEOUS WASTES
GASES
HEAT ENGINES
HEAT RECOVERY
HEAT RECOVERY EQUIPMENT
HEAT TRANSFER
INTERNAL COMBUSTION ENGINES
POLLUTANTS
POLLUTION ABATEMENT
POWER PLANTS
RECOVERY
STEAM GENERATORS
TEMPERATURE CONTROL
VAPOR GENERATORS
WASTES