Preventive measures for coking of biomass boilers 8
The secondary air distribution method between the layers of the biomass boiler burner adopts a waist-shrinking air distribution method.
The secondary air distribution method between the layers of the biomass boiler burner adopts a waist-shrinking air distribution method. The opening of the secondary air damper of the upper and lower layers is adjusted to 100%, and the opening of the middle secondary air damper is adjusted to 30%. When the coal quality is good, it can be adjusted to 50%. The waist-shrinking air distribution method can strengthen the ignition of coal powder, improve the stability and economy of biomass boiler combustion, and in addition, the coking of the furnace can also be improved. The reason is that the middle secondary air is in the middle of the two primary air flows. When its momentum is small, the suction amount of the primary air flow on it is small and the negative pressure is also small. Therefore, the impact force caused by the main air flow from the upper corner is also small, which will not cause the primary air flow in the middle to be seriously deflected and cause slagging.
