FIELD: process engineering.
SUBSTANCE: invention relates to boiler with circulating fluid bed. Boiler comprises furnace for combustion of carbon-bearing fuel and exhaust channel communicated with furnace top to remove smoke fumes and solids formed in combustion therefrom. Exhaust channel is furnished with parts separator connected with channel to transfer smoke fumes cleaned of solids from the boiler and with return channel to transfer separated solids into furnace bottom. Said return channel is provided with gas seal, heat exchange chamber, lift channel and bypass channel. Note here that effluent solids from gas seal are directed into heat exchange chamber top section and from chamber bottom via lift channel, or directly from chamber top via bypass channel, into the furnace. Boiler is provided also with downward discharge tube jointed with lift channel. Note here that said tube is intended for streamwise communication with lift channel top section and furnace bottom section. Aforesaid bypass channel is directly communicated with downward discharge tube top section.
EFFECT: compact design, efficient heat exchange.
14 cl, 6 dwg
