Multi-stage combustion heat accumulating type combustor with low nitrogen oxide content

The utility model relates to a multi-stage combustion heat accumulating type combustor with low nitrogen oxide. The multi-stage combustion heat accumulating type combustor comprises a hot air cavity,a primary air sleeve, a fuel gas core pipe and tiles. The left end of the hot air cavity is connected with the tile flange, and a hot air inlet is formed in the side wall of the hot air cavity; a plurality of first air outlet holes communicated with the two ends of the tile and a plurality of second air outlet holes communicated with the right end of the tile and the fire spraying holes are respectively formed in the tile upper ring fire spraying holes at the periphery of the fire spraying holes; the left end of the primary air sleeve penetrates through the hot air cavity and is communicated with the flaming hole, and a primary air inlet is formed in the primary air sleeve on the right side of the hot air cavity; the gas core pipe is inserted into the primary air sleeve, and a gap is reserved between the gas core