FIELD: power industry.
SUBSTANCE: method of two-stage combustion of solid fuel involves furnace filling with solid fuel in lumps, oxidiser supply to the furnace through grates at the furnace bottom, where in operation mode the oxidiser is fed through grates in amount insufficient for full oxidation of lump fuel, afterburning of obtained gas outside if the furnace using additional oxidiser feeding, combustion heat transfer to heat exchange system with tubular heat exchangers filled with liquid heat carrier, and flue gas exhaust. Side surfaces of the furnace ore formed by tubular heat exchangers installed over gaps, and pyrolysis gas collection chamber is positioned between heat exchangers and furnace housing.
EFFECT: higher energy saving, reliability, durability, improved specific output of heat energy per furnace volume and weight.
10 cl, 2 dwg
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