| 摘要 |
FIELD: power industry. ^ SUBSTANCE: flat-flame roof burner (10) intended for installation in roof (21) that restricts combustion chamber (20) of steel heating furnace, includes the main metal hollow cylindrical housing (12), single fuel gas supply channel (13) which is concentric relative to the main housing (12), internal central nozzle (14) for injection of fuel gas and single air channel (30) connected to the main housing (12). Burner includes at least two external nozzles (17) located outside the main housing (12) for injection of fuel to combustion chamber (20), the first distributing device 15) made in the form of distributing valve for flow control of central fuel gas flow, gas distributing system (16) consisting of row of tubes (16') and meant for feed of at least two above external nozzles (17), the second distributing device (18) defined as the second distributing valve and meant for flow control of gas flow at least in two above external nozzles (17). By means of the above distributing valves (15, 18) the gas distribution percentage can be regulated between central internal nozzle (14) and at least two above external nozzles (17) so that possibility of continuous transition from flame working mode in which fuel is supplied only through central gas nozzle (14) to flameless mode in which fuel is discharged only through external gas nozzles (17) is provided. ^ EFFECT: invention allows providing low level of NOx emissions to atmosphere. ^ 16 cl, 5 dwg |
