The invention belongs to the field of combustors and relates to a self pre-heating type high-speed burning
nozzle and a control method thereof. A
fuel gas supplying
pipe is provided with a radial jetting
fuel gas supplying
pipe and an axial jetting
fuel gas supplying
pipe; through a fuel gas adjusting plate arranged at a fuel gas supplying pipe inlet position, the proportion of fuel jet in the radial direction and fuel jet in the axial direction is automatically adjusted; a
combustion chamber penetrates through the middle of a
flue gas flow guiding device; after air pass through a pre-heater,part of the air directly flows into a main
combustion space from a gap between the
combustion chamber and the
flue gas flow guiding device, and remaining air flows into the
combustion chamber and is sprayed into the main combustion space when reacting with fuel gas; and the gap between the
combustion chamber and the
flue gas flow guiding device is increased along with rising of the temperature. According to the self pre-heating type high-speed burning
nozzle and the control method thereof, due to the fact that the pre-heater expands due to heating, the position of the
flue gas flow guiding device is adjusted, and the air grading proportion is controlled; meanwhile, the fuel grading proportion is correspondingly adjusted,
flame stability under the medium and low temperature state can be effectively guaranteed, the
flame length under the high temperature state can also be automatically lengthened in a pulling manner, the
flame local high temperature is controlled, temperature uniformityis improved, and
NOx emission is lowered.