METHOD OF PULVERIZED COAL, NATURAL GAS AND LIQUID-FUEL MIXTURE COMBINED COMBUSTION Russian patent published in 2017 - IPC F23C1/00 F23C5/08 

FIELD: power industry.

SUBSTANCE: method of pulverized coal, natural gas and liquid-fuel mixture combustion by exothermic air oxidation in a vertical quadrangular prismatic furnace with supply through burners of primary reactant flows of preprepared pulverized-coal-air mixture, gas-air mixture and liquid-fuel-air mixture mounted on two opposite walls in horizontal and four vertical rows tangentially to horizontal circumferences at the furnace center to form two oppositely-spaced fluidic fuel-air couples, as well as post-combustion air flows tangentially to the horizontal circumferences adjacent to the walls on the level of each horizontal burner. Pulverized coal is used as a fuel component for one of the fluidic couples, natural gas and liquid-fuel mixture are used for another fluidic couple, wherein alternating supply of primary reactant flows of pulverized-coal-air mixture and primary reactant flows of gas-air mixture and liquid-fuel-air mixture are carried out through the burners of vertical rows.

EFFECT: invention enables to reduce heat losses with exhaust gases and unburnt fuel, regardless of the fuel mode.

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