Straw fuel gas dedusting purifying tower

The utility model relates to equipment for manufacturing biomass energy, in particular to a straw fuel gas dedusting purifying tower, wherein the straw fuel gas dedusting purifying tower comprises a closed tower body and an air inlet pipe and an air outlet pipe which are mounted on the tower body; the mounting position of the air inlet pipe is lower than that of the air outlet pipe; at least one layer of filer net is arranged in the inner cavity of the tower body between the air inlet pipe and the air outlet pipe; the air outlet pipe is communicated with a vacuum pump by a connecting pipe; during use, the air inlet pipe is communicated with an air outlet pipeline of a roaster; the vacuum pump is started to suck air, so when straw fuel gas generated from the roaster passes by the filter net, dust particles contained in the straw fuel gas are stopped by the filter net to fall into the tower body and/or be adsorbed onto the filter net. The straw fuel gas dedusting purifying tower has the advantage of improving t