PROCEDURE FOR GAS-DYNAMIC PRESSURISATION OF LOADING AND UNLOADING GATES OF DRAW FURNACE Russian patent published in 2011 - IPC F27D7/06 

FIELD: machine building.

SUBSTANCE: procedure for gas-dynamic pressurisation of loading and unloading gates of draw furnace consists in circulation of protective gas in chambers of gas seal due to drop of pressure in each of these chambers. Also, intensity of circulation is controlled with a circulation circuit wherein flow of gas is actuated with a fan connected to the chambers. For circulation of protective gas there is used an intermediate chamber connected with two fans. Relative to this chamber the fans generate two independent circulating circuits of gas motion. There is used the intermediate chamber connected to an outlet of one fan and to an outlet/inlet of another. A reverse fan generating a circulation circuit of gas motion adjoins the furnace. Gas pressure excessive relative to atmosphere and stabilised in time is set in the intermediate chamber. The value of this pressure is less, than working pressure of protective gas in the furnace. Pressure of protective gas in the intermediate chamber can be stabilised within the range of 0.25-0.5 of working pressure of gas in the furnace.

EFFECT: stabilisation of mode of gas-dynamic pressurisation of loading and unloading gates in draw furnace.

2 cl, 1 dwg