Biomass heat carrier boiler is a new liquid phase furnace developed and developed by our company with a high level, and has won a number of biomass related awards. The biomass boiler design of our company is equipped with secondary air structure, which accounts for about 30 percent of the total air volume. The secondary air plays a key role in the combustion of the boiler. The secondary air stirred the gas in the furnace to mix it, so that the flue gas in the furnace produced a vortex, continued the suspended fly ash and fly ash fuel travel in the furnace, and further reduced the fly ash and fly ash fuel. The amount of fly ash can be reduced, and the combustible material of fly ash can be reduced. In addition, some air is supplied to the suspended fuel to reduce the initial exhaust smoke concentration of the boiler.