FURNACE Russian patent published in 1998 - IPC

FIELD: combustion of solid fossil fuel with high volatile content. SUBSTANCE: furnace has prismatic combustion chamber 1 with dry-bottom hopper 2 formed by wall slopes at bottom part of chamber 1 and provided with alkali mouth 4. Burner 5 is mounted on wall of chamber 1. Placed under mouth 4 of dry bottom hopper 2 over its entire width is device 3 for admitting bottom blast to form vortex zone in bottom part of combustion chamber 1. Furnace is provided, in addition, with gas intake shaft 6 communicating with furnace interior on its upper part through gas intake port 7 and on lower part, through mill-fan 10 and burner 5. Furnace also has channel 9 for passing sorbent to bind sulfur compounds which communicates with gas intake shaft 6 and internal space of furnace through channel 8. During furnace operation, sorbent for binding sulfur and inert flue gases enter gas intake shaft 7 wherein volatiles are partially separated from fuel and sulfur contained in it is bound under effect of hot flue gases. After mechanical treatment in mill-fan 10, fuel mixed up with gases and sorbent goes to vortex zone of combustion chamber 1 wherein sulfur is finally bound. EFFECT: improved design. 1 dwg