The high clean biomass hot air furnace with heating capacity 1800*104Kcal/h has been put into operation recently, and is currently the largest single biomass hot air furnace for drying feed grade monocalcium phosphate in China. The biomass hot air furnace adopts multiple patented technologies of Meibao, actively responding to the national development strategy of energy conservation and emission reduction. It is the promotion and application of Meibao's biomass hot air furnace in the feed industry after its application in daily chemical, fertilizer, rubber and other industries.