METHOD AND DEVICE OF RADIATION HEATING OF INDUSTRIAL FURNACE Russian patent published in 2011 - IPC F23D14/12 F23C9/00 F23L15/04 

FIELD: power industry.

SUBSTANCE: radiation heating device of industrial furnace includes assembly (1) of the first burner, which includes the first burner (2) forming hot exit gas due to fuel combustion with combustion air, the first air supplying device (60) through which plenum air is supplied to the first burner (2), and the first tube (20) of radiation heating, which includes rear end section (20a) connected to the first burner (2), and front end section (20b) located at some distance from rear end section (20a) with possibility of passage of hot exit gas, which is formed with the first burner (2), from rear end section (20a) to front end section (20b) of the first tube (20) of radiation heating and transfer on this way of heat energy to tubular wall of the first tube (20) of radiation heating, assembly (1') of the second burner, which includes the second burner (2') forming hot exit gas owing to fuel combustion with combustion air, the second air supplying device (60') through which plenum air is supplied to the second burner (2'), and the second tube (20') of radiation heating, which includes rear end section (20a') connected to the second burner (2') and front end section (20b') located at some distance from rear end section (20a) with possibility of passage of hot exit gas, which is formed with the second burner (2'), from rear end section (20a') to front end section (20b') of the second tube (20') of radiation heating and transfer on this way of heat energy to tubular wall of the second tube (20') of radiation heating; the first connecting element (50) connecting rear end section (20a) of the first tube (20) of radiation heating to front end section (20b') of the second tube (20') of radiation heating so that at least some amount of exit gas, formed in the second tube (20') of radiation heating can be transferred to the first burner (2) and again combusted by using the first burner (2), the second connecting element (50') attaching rear end section (20a') of the second tube (20') of radiation heating to front end section (20b) of the first tube (20) of radiation heating so that at least some amount of exit gas formed in the first tube (20) of radiation heating can be transferred to the second burner (2') and again combusted by using the second burner (2'). Each connecting element is equipped with injection nozzle (76, 76') which injects exit gas from tube (20, 20') of radiation heating, which is connected to it. Injection nozzle (76, 76') is provided with possibility of movable adjustment providing the control of the amount of exit gas drawn from tube (20, 20') of radiation heating, which is connected to it.

EFFECT: invention allows reducing NO_x content in combustion products.

23 cl, 7 dwg