A dense phase swirl pulverized
coal burner comprises a primary
air channel, a direct flow secondary
air channel and a outermost swirl secondary
air channel; and multiple levels of pulverized
coal concentration rings are arranged axially at intervals along the oil gun casing in a
straight tube section of the primary air channel, so that pulverized
coal air flow is distributed thickly outside and thinly inside the primary air
nozzle. In the invention, dense phase pulverized coal outside the primary air
nozzle passes through guide vanes, forms disturbed flow, is ejected into a furnace and mixes with high temperature
backflow flue gas rapidly and sufficiently at an outlet. Meanwhile, dilute pulverized coal air flow at the center is ejected into the furnace by direct flow, ensuring subsequent mixing and
combustion of pulverized coal flow. The primary air
nozzle and the secondary air nozzle are provided with cone flaring structures with certain angle to effectively control appropriate mixing of secondary air and pulverized coal. The invention has advantages of strong ignition and
combustion stability, good coal adaptability, low
nitric oxide emission, simple primary air channel structure and small resistance, which effectively slows wear rate of parts.