The invention relates to a
fuel gas combustion device with ultra-low
NOx emission amount and a
fuel gas distribution method, aims at enabling
NOx emission amount to be smaller than 20ppm and meeting the low-emission requirement of a high-power
combustor and belongs to the technical field of industrial boilers. The
fuel gas combustion device with the ultra-low
NOx emission amount is characterized in that a central
barrel, a swirler, an inner
throat and an outer
throat are sequentially and coaxially arranged along the central axis of the
combustion device outward, a first combustion
air channel is arranged between the inner
throat and the outer throat, a second combustion
air channel is arranged between the inner side of the inner throat and the outer side of the central
barrel, and a plurality of T-shaped fuel gas guns and a plurality of oblique-mouth fuel gas guns are arranged, staggered and evenly distributed in an equal-
diameter mode. The fuel gas combustion device with the ultra-low NOx emission amount and the fuel gas
distribution method have the advantages that fuel gas holes of the oblique-mouth fuel gas guns are outward,
flame is formed in the first combustion
air channel on the outer side of
flame of the T-shaped fuel gas guns, accordingly a
boiler furnace space is utilized to the most extent, the amount of produced NOx is little and is smaller than 20ppm, no CO is produced, and combustion is stable and reliable. The maximum power of one
machine can reach to more than 70MW.