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. In fact, solid-fuel boiler includes furnace, attached to it heat exchanger chamber with exhaust pipe and grate located in furnace lower part with slots made in it for ash removal into ash box arranged under grate. At that, grate consists of stationary metal plate inclined towards gases exit from furnace, in middle part of which over it movable plate is located, and above moving plate fixed coating plate is attached to furnace walls. Above grate at distance of 2–4 cm from plate with grate protective angles are made, serving to prevent air passage shutting off in grate slot.
EFFECT: technical result 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
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