Fixed bed updraught type biomass gasification furnace with middle gas outlet

The utility model provides a fixed bed updraught type biomass gasification furnace with a middle gas outlet, which aims to improvement of gas quality of a produced combustible gas. The fixed bed updraught type biomass gasification furnace with the middle gas outlet comprises a furnace body, wherein a feed inlet is formed in the top of the furnace body, an air inlet and a slag outlet are formed in the bottom of the furnace body. The fixed bed updraught type biomass gasification furnace is crucially characterized in that a hopper-shaped blanking skirt with a middle opening is arranged in the middle area of the furnace body, the edge of the blanking skirt and the inner wall of the furnace body are connected and fixedly arranged, a gas collection part is formed between the blanking skirt and the inner wall of the furnace body, and a gas outlet communicated with the gas collection part is formed in the furnace body. The gasification furnace solves two crucial problems by adopting the advantages of gas-solid downstream and upstream as follows: firstly, gas ascending from the bottom through a combustion area and a reduction area is discharged out of the furnace through a high-temperature thermal decomposition area, so that high-temperature thermal decomposition can be avoided, the yield of tar can be reduced and the quality of gas can be improved; and secondly, ying area, flows downward to participate a gasification reaction, so that the content of ash in the combustion gas is less.