Fluidized bed biomass gas industrial boiler system

The utility model relates to a fluidized bed biomass gas industrial boiler system, which comprises a fluidized bed gasification unit and a gas purification unit, wherein the fluidized bed gasification unit is connected with an industrial boiler through the gas purification unit and a gas storage cabinet; the fluidized bed gasification unit comprises a fuel feeding device, a bed material feeding device, a fluidized bed gasification furnace, a cyclone separator, an ash removal device, an air inlet device and an air pre-heater, wherein the fuel feeding device is connected with the feeding hole of the fluidized bed gasification furnace, the lower end of the cyclone separator is connected with an air closer through a connecting pipe, the air closer is connected to an ash removal auger, the outlet of the ash removal auger is connected to an ash hopper, and the air pre-heater is positioned in an interlayer of the level-one cyclone separator; the air inlet device is connected with the air pre-heater through a pipeline, and the other pipeline is standby; and a bed material feeding hole is formed at the lower part of the fluidized bed gasification furnace. Through the system, biomass is converted into clean gas which further is efficiently combusted in the industrial boiler to release heat, thereby greatly reducing the discharge of sulfur dioxide and nitrogen oxide.