Process and apparatus for preheating the combustion mediums used

Details Process and apparatus for preheating the combustion mediums used Process and apparatus for preheating the combustion mediums used

1983-12-09

1985-01-08

Camby, John J.

Heating

Processes of heating or heater operation

Of heating a fluid

266139, 432219, F24H 700, F24H 100, F28C 310, C21C 548

Patent

active

044925689

ABSTRACT:
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.

REFERENCES:
patent: 4452586 (1984-06-01), Voges

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