SOLID-FUEL BOILER Russian patent published in 2017 - IPC F24H1/00 

FIELD: fuel.

SUBSTANCE: invention relates to solid fuel combustion devices, preferably with lower combustion zone, and can be used in heat engineering, chemical and other industries. Set task is solved by fuel boiler containing, in fact, furnace, attached to it heat exchanger chamber with chimney and grate located beyond combustion zone in furnace lower part with slots made in it for ash removal into ash box arranged under grate, differing by fact, that grate consists of stationary metal plate inclined towards gases exit from furnace, in middle and lower parts of which two or more rows of welded into it pipe sections are arranged with length of 3–4 cm with through holes, covered from above along grate axis with protective angles to prevent ingress of fuel and ash into holes, and on plate back side air passage through pipes sections mechanical shut off device is made.

EFFECT: technical task is enabling of boiler operation power control in wide power range from 5 % to 100 % while maintaining optimum conditions of fuel combustion and high efficiency.

1 cl, 2 dwg