FLUE FOR FURNACE Russian patent published in 2016 - IPC F24B5/00 E04H12/28 F23J11/00 

FIELD: furnaces.

SUBSTANCE: invention relates to designs of furnaces and methods of fuel combustion and can be used during development of furnaces for combustion of any type of fuel. Flue for furnace for heating, mostly, bath rooms includes vertically oriented housing, bottom inlet part of which is connected to source of hot gases, preferably, of fuel combustion products in furnace, and top output is to atmosphere. In central part of pipe casing, its lower and upper parts are connected to each other by means of several isolated channels of round cross section, total flow area of which is equal to or exceeds passage area of stack. Said channels are installed in stepped extensions made on adjacent sections of pipe, where the area of each of stepped expansion exceeds passage area of stack, at that, at least in one channel, preferably, in each, swirler is installed.

EFFECT: technical result is improvement of heat output by lowering temperature of exhaust flue gases.

1 cl, 3 dwg