The invention relates to a local
oxygen-enriched
combustor for a
cement kiln furnace. Through the arrangement of an
oxygen-enriched air passage outside an axial flow air passage of the
combustor and the arrangement of a
spray nozzle at an outlet of the
oxygen-enriched air passage, the
spray nozzle is arranged at the lower part of the outer side circumference of the air flow air
spray nozzle and is near the clinker or analogue side, so the local concentration of the
oxygen gas at the contact side of the lower part of the
combustor and the oxygen-enriched air passage is raised, the
combustion speed of the fuel can be accelerated, the local heat accumulation is directly caused, the adjacent fuel also begins to combust along with the proceeding of the
diffusion,
heat transfer and heat
radiation processes, the temperature of the direct contact side of the clinker or analogue of a
rotary kiln with the oxygen-enriched air passage is obviously raised, and the response to the
raw material mass fluctuation caused by proportioning can be realized. In addition, a center angle corresponding to a distribution region in the circumferential direction is set to be smaller than or equal to 270 degrees, the angle range can completely cover the region of the fuel and the
cement clinker or analogue rotating along with the
rotary kiln, and the use precision and the economization of oxygen-enriched air can be ensured.