STEAM BOILER WITH SWIRLING-TYPE FURNACE Russian patent published in 2010 - IPC F22B37/00 

FIELD: power industry.

SUBSTANCE: steam boiler with swirling-type furnace includes fuel feeder, primary air-blast system, which has at least one gas-overflow opening with annular secondary air nozzle directed to the furnace towards the exit flow and mounted on dividing furnace waterwall. At that, boiler is provided with annular swirler made in the form of annular secondary air channel creating the restricting air screen formed with the shell mounted along the perimetre of inner surface of gas-overflow opening housing towards fuel combustion chamber and connected by means of distributing air channel to tangentially mounted supply air-blast connection pipe, and dividing furnace waterwalls are made in the form of flat wall of the row of tubes with heat carrier, which are connected to each other by means of metallic inserts.

EFFECT: more complete and stable combustion of fuel particles owing to heat transfer of heated gases to heat carrier.

8 cl, 3 dwg