The invention provides a pneumatic
powder conveyor and an automatic cleaning method thereof, and relates to the technical field of material transportation. The technical problems that in the prior art, blockage is prone to occurring, cleaning operation wastes time and labor, and the material conveying efficiency is low are solved. The pneumatic
powder conveyor comprises a
storage tank, a cylindrical
filter element, a cleaning
pipe, a warm air inlet
pipe, an in-tank partition plate, a negative pressure suction
pipe, a negative pressure suction pipe, a
discharge valve, a sealing bin door, a
sewage discharge bin, a
sewage discharge pipe, a cleaning sealing plate and a sealing plate dust removal mechanism, and the cylindrical
filter element is of a cylindrical hollow structure provided with a plurality of through holes and is arranged in the
storage tank; the cleaning pipe comprises a flow inlet part and a flow outlet part, the flow inlet part extends out of the
storage tank, and the flow outlet part extends into the cylindrical
filter element and is provided with a plurality of jet holes; the warm air inlet pipe comprises an air inlet part and an air outlet part, and the air outlet part extends into the
material storage tank. The cleaning convenience of the
machine is improved, and then the conveying efficiency of materials is improved.