This product adopts the circulating fluidized bed gasification method, as the gasification agent, driven by blower air by gasifier cloth at the bottom of the plate into the gasifier and wind blowing furnace hot bed material (appropriate particle size of river sand, slag, in boiling state.Sawdust by gasifier bottom to join, in a state of high temperature of bed material under the action of heat, complete with air gasification reaction, the gas (gas) on top of the gasifier with circulating ash into the cyclone separator, after a gas-solid separation, gas leaving gasifier, circulating ash and by dipleg unreacted carbon part, through the feed back into the reaction furnace to continue.Because of the cyclic fluidization method, wood chips stay in the furnace for a long time, which can realize the transformation of biomass at lower temperature.To adopt advanced technology of circulating fluidized bed, through thermal chemical conversion process will be a wide variety, different physical and chemical properties of fuel into combustible gas, fuel for power generation, heat supply, gas supply, can also be combined with various kinds of coal-fired boiler, gas &coal mixing, improve the efficiency of the boiler, basic need not change the original boiler structure, has strong applicability.