Dust pneumatic conveying device

The utility model discloses a dust pneumatic conveying device, and particularly relates to the technical field of dust conveying, which comprises a dust conveying pipe, a dust conveying tank is arranged at the top of the dust conveying pipe, a first filter screen for screening dust is fixed on the inner wall of the dust conveying tank, and a conveying mechanism is arranged in the dust conveying tank. The conveying mechanism comprises a shell fixed to the top end of the dust conveying tank, a hollow rotating rod is arranged in the shell, the bottom end of the hollow rotating rod penetrates through the top end of the dust conveying tank and extends into the dust conveying tank, the hollow rotating rod is arranged at the top of the first filter screen, and a plurality of hollow rods are fixed to the outer end of the hollow rotating rod; a plurality of first spray heads are fixed to the bottom end of each hollow rod, two hollow plates are fixed to the outer end of the bottom of each hollow rod, and a plurality of