FLUIDISED BED FUEL COMBUSTION METHOD AND DEVICE Russian patent published in 2010 - IPC F23C10/12 F23C6/04 

FIELD: power engineering.

SUBSTANCE: fluidised bed fuel combustion device includes reactor having lower and upper zones, device for fuel feeding to upper zone, device for supplying primary compressed air flow to lower zone, air-distributing grid installed in upper part of lower reactor zone, chamber located under air-distributing grid and connected to non-combustible component discharge device; at that, upper zone has inner cylindrical surface coaxially to which an outlet cylindrical nozzle is made in upper reactor edge. Upper reactor zone is divided into combustion zone and afterburning zone; at that, combustion zone is located between lower reactor zone and afterburning zone restricted with upper reactor edge; at that, combustion zone and afterburning zone are connected by means of cylindrical channel, and each zone has in upper part the device for tangential supply of secondary compressed air, which is connected with one or more tangential nozzle channels with inner cylindrical surface of appropriate zone, and fuel feeding device is connected to upper part of combustion zone. Diametre of inner surface of afterburning zone is equal to 0.4-0.8 of diametre of inner surface of combustion zone. Diametre of cylindrical channel connecting combustion zone and afterburning zone to each other is equal to 0.5-1.0 of diametre of inner cylindrical surface of afterburning zone. Inner diametre of outlet nozzle in upper edge is 0.5-0.7 of diametre of inner cylindrical surface of afterburning zone. In devices for tangential supply of secondary air of combustion zone and afterburning zone, channels are directed to one and the same side.

EFFECT: improving fuel combustion efficiency.

11 cl, 4 dwg