FURNACE OF STEAM OR HOT-WATER BOILER TO BURN TIMBER WASTE OF HIGH ASH CONTENT Russian patent published in 2000 - IPC

FIELD: equipment burning fuel. SUBSTANCE: invention refers to technology of fuel burning, timber waste including bark in particular, in steam and hot-water boilers of industrial heating boiler rooms. When furnace functions fuel goes to stack under action of gravity force as it burns up. Air from blow fan goes to ash dump and further on into blow conduits from which it is supplied under fire grate and above it through windows in stack walls ensuring opposite blast and forming trough-shaped firebed surface. Rotary fire grates turn through angle of about 20 deg on both sides relative to working position with the aid of driving mechanism to clean fire grate from ash and slag. In this case ash fall through into ash dump. EFFECT: enhanced functional efficiency of furnace due to exclusion of need for frequent bringing it out of operation for ash cleaning. 2 dwg