FURNACE Russian patent published in 2000 - IPC

FIELD: mechanical engineering. SUBSTANCE: furnace has combustion chamber with at least one burner mounted on its wall in inclined position and used for delivery of fuel-and air mixture and prismatic ash hopper. Slotted mouth of ash hopper is formed by slopes of walls of lower portion of combustion chamber. Located under ash hopper blast is device for introducing air for undergrate blast; wall of undergrate blast device located opposite undergrate blast air supply nozzle is concave relative to above-mentioned nozzle. Undergrate blast putting-on device is located over entire width of ash hopper mouth; concave wall adjoins ash hopper mouth in its upper portion; it is so located that imaginary plane which is just its extension intersects opposite slope of ash hopper in its center portion; axis of undergrate blast air supply nozzle passes along lower part of concave wall and is directed upward in such position that angle between this axis and concave wall ranges from 0 to 45 deg. EFFECT: complete combustion of fuel due to return of particles to vortex zone; enhanced economical efficiency. 3 cl, 2 dwg