The LHG-s series biomass coal fired steam generator is a semi-gasification fire-tube steam generator that uses biomass pellets as fuel to produce steam. The boiler employs a unique micro-positive pressure combustion technology and is equipped with double economizers and an external water membrane dust remover. It incorporates a secondary air supply for suspended semi-gasification combustion technology, achieving a biomass combustion efficiency of up to 99.9%. The flue gas is recycled through multiple passages, increasing the heating surface area by 30% and significantly  enhancing the boiler's  thermal efficiency. The  biomass steam generator meets  environmental requirements in various regions and produces no smoke or dust after normal  combustion. The outer  shell is constructed with high thermal resistance fibers  and  an enclosed metal casing as insulation, with careful consideration for ease of operation, maintenance, and repair during the design process.