METHOD FOR PRODUCING ACTIVE FRACTIONATED COAL IN CHAMBER ON GRATE Russian patent published in 2017 - IPC F23C1/04 F23B80/02 

FIELD: power industry.

SUBSTANCE: method for producing active fractionated coal in a chamber on a grate by prelimiminary connection of the chamber to a gas path of a fuel combusting device and filling the grate with a layer of fractionated coal particles, their subsequent activation by heating passed through the layer through the flue gas flow with an oxygen content of 16% and a temperature of 900-1300 °K and separation of moisture and volatile combustibles, the supple of the latest in a fuel-burning arrangement, layer blowdown by steam, cooling by flue gas flow introduced under the grate and fed across the layer below with oxygen content of 16% and a temperature of 400-500 °K and output from the grate of heat-treated activated carbon particles freed from moisture and volatiles. While activation the heating flue gas flow is directed into the top layer, and under the grate cooling flue gases are simultaneously introduced at a rate of V₁=(0.4-0.6)V_heat. Moreover, the bottom layer is periodically blown with the same gases with a rate V₂=(0.8-1.2)V_cool with a simultaneous cutting-off of supply of the heating gas layer during the blowdown where V_heat and V_cool are heating and cooling costs in periods of gases activating and coal particles cooling, ncbm/s.

EFFECT: invention improves the reliability of the equipment used and the effectiveness of activating.

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