FURNACE DEVICE Russian patent published in 2001 - IPC

FIELD: burning fuels; heating boiler houses, thermal stations and individual heating systems. SUBSTANCE: furnace includes combustion chamber with concave fire grate and fuel agitator, gas after-burner chamber, feeder for delivery of fuel to combustion chamber and ash removal system; arch mounted above feeder forms gas duct from combustion chamber to after-burner chamber fire grate is provided with opening of ash removal system on side of its rear face; movable wall is located in lower portion of said opening. EFFECT: enhanced efficiency of burning low-grate moisture- contaminated solid fuel; reduced incomplete combustion; enhanced efficiency. 2 dwg