HEATING BOILER Russian patent published in 1994 - IPC

FIELD: thermal power engineering. SUBSTANCE: boiler has shell 1 with combustion chamber 2, a fire bar and an ash bin. A furnace device made in the form of a stack of cone-shaped rings 8 fastened to each other by rods 9 is mounted in combustion chamber 2. The rings are located in stages to form clearance 10 in between and annular clearance 11 with combustion chamber 2. The smaller diameter of rings 8 faces the fire bar and its taper angle exceeds the natural slope angle of the fuel. EFFECT: improved structure. 2 cl, 3 dwg