首阳山电厂采用回流区分级着火燃烧技术改造了原燃烧器，在低负荷时，约有10％～15％的一次风粉进入钝体后的回流区内，由于回流区内速度低、温度高、迅速着火，去点燃主流时，大大增强了低负荷的稳燃能力。高负荷时，周界风进入回流区，降低温度，延迟着火，防止炉墙的结焦形成。 Shouyangshan Power Plant adopts the reflow zone-based ignition combustion technology to transform the original burner. At low load, about 10% to 15% of the primary air powder enters the backflow zone after the bluff body. Because of the low velocity in the backflow zone, the temperature High, rapid fire, to ignite the mainstream, greatly enhancing the stability of low-load combustion capacity. High load, the perimeter of the wind into the reflow zone, reduce the temperature, delay the fire, to prevent the furnace wall coking formation.