Method for preventing dust depositions or build-ups in off-gas c

Details Method for preventing dust depositions or build-ups in off-gas c Method for preventing dust depositions or build-ups in off-gas c

1985-03-11

1987-03-17

Joyce, Harold

Furnaces

With fuel treatment means

Preliminary refuse treatment means

75 25, 110160, 266156, 266157, 373 9, F23J 300

Patent

active

046498079

ABSTRACT:
A method for preventing deposits or build-ups of dust in off-gas channels for dust-containing off-gases from electrothermal smelting furnaces. This is done by blowing an additional gas tangentially into the furnace off-gas channels at the positions where build-ups or deposits of dust normally occurs. Hence a gas spiral is provided between the inner wall of the furnace off-gas channels and the dust-containing, hot furnace off-gas. Recirculated and cooled furnace off-gas is preferably used as additional gas. For open furnaces where the furnace off-gas is completely combusted before it enters into the furnace off-gas channels, air can be used as additional gas. The temperature of the additional gas is preferably kept below the sintering temperature of the dust in the furnace off-gas.

REFERENCES:
patent: 3695192 (1972-10-01), Von Brimer
patent: 3792998 (1974-02-01), Norro

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