Reaction furnace for producing biomass gas

The utility model discloses a reaction furnace for producing biomass gas. The reaction furnace comprises a furnace body and a feeding device, the feeding device comprises a storage box and a spiral feeder, a rotor is arranged in the storage box and provided with blades, and a discharging port of the spiral feeder is formed in the upper portion of the furnace body. An oxygen inlet pipe is arrangedat the top end of the furnace body, and the furnace body comprises a feeding port, a reaction cavity and an ash chamber which are sequentially arranged from top to bottom. The reaction cavity is provided with a fire grate and an ignition port, and the lower end is provided with an ash outlet. The side wall of the ash chamber is connected with an exhaust pipe, a rotating shaft is arranged in the ash chamber, and an impeller is sleeved on the rotating shaft. The utility model has the beneficial effects of simple structure, convenience in use and low cost. The fuel utilization rate of combustiblesubstances can be effecti