Process and apparatus for preheating the combustion mediums used for firing blast furnace stoves

Patent · Tue Jan 08 04:00:00 EST 1985

OSTI ID:5914894

Palz, H

Combustion air and fuel gas used for firing blast furnace stoves is preheated by utilizing the heat of waste gases resulting from such firing. The combustion air and fuel gas are passed through respective heat exchangers in heat exchange relationship with the waste gases, thereby preheating the combustion air and fuel gas. The combustion air, after passage thereof through the respective heat exchanger, is further preheated by an externally fired recuperator. The flue gases from the externally fired recuperator are fed to the waste gases before preheating of the combustion air by such waste gases. The external firing of the recuperator is controlled as a function of the final preheated temperature of the thus twice preheated combustion air.

• Assignee: Didier-Werke AG (Germany, Federal Republic Of)
• Patent Number(s): US 4492568
• OSTI ID: 5914894
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320304* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
BLAST FURNACES
COMBUSTION HEAT
ENERGY
ENERGY TRANSFER
ENTHALPY
FLUIDS
FUEL GAS
FUEL-AIR RATIO
FUELS
FURNACES
GAS FUELS
GASES
HEAT
HEAT EXCHANGERS
HEAT TRANSFER
HEATING
IGNITION
PHYSICAL PROPERTIES
REACTION HEAT
THERMODYNAMIC PROPERTIES
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION