The autoclaved curing process of building materials in the project needs a lot of steam support, and requires stable steam supply. ZOZEN technicians designed a set of biomass boiler that is not easy to coke and accumulate ash. By adjusting the internal structure of the boiler and changing the arrangement of the drum, the dust in the flue gas can directly settle into the ash hopper at the bottom of the convection zone when the flue gas enters the convection zone from the furnace outlet.