Device for purifying compressed air and reducing magnetic substances in pneumatic conveying system

The utility model relates to a device for purifying compressed air and reducing magnetic substances in a pneumatic conveying system, which comprises a compressed air storage tank and an air supply pipe communicated with the compressed air storage tank, a filter and an air storage tank are arranged on the air supply pipe along the air outlet direction, and a back flushing pipeline is communicated with the air supply pipe between the filter and the air storage tank. According to the utility model, the magnetic substances are effectively reduced, the product quality is improved, the magnetic substance content of 50-80PPb before pneumatic conveying of the disc dryer and the magnetic substance content of 50-78PPb after pneumatic conveying are verified through tracking, no obvious increment change exists before and after pneumatic conveying, and filtered impurities are discharged by clean air in a back-blowing manner at regular time; the filter device is simple in structure and convenient to use, achieves a good us