Corrosion-resistant air preheater capable of slowing down dust deposit

A corrosion-resistant air preheater capable of slowing down dust deposit, comprising a shell, wherein an air inlet is fixedly formed in the side wall of the shell, an air outlet is fixedly formed in the side, away from the air inlet, of the shell, a flue gas through pipe is fixedly arranged on the inner side wall of the shell, rotating assemblies are arranged on the outer side wall of the flue gas through pipe, a flue gas inlet box (8) is fixedly arranged at the top of the shell, a flue gas inlet (5) is fixedly formed in the top of the flue gas inlet box, a dust removal device is arranged on the inner side wall of the flue gas inlet, a dust discharge mechanism is arranged on the side wall of the flue gas inlet, a flue gas outlet box is fixedly arranged at the bottom of the shell, and a flue gas outlet is fixedly formed in the bottom of the flue gas outlet box;

• wherein the rotating assemblies comprise connecting plates movably arranged on the outer side wall of the flue gas through pipe, a rotating plate is movably arranged at the end of the connecting plate, and a torsion spring is arranged at the joint of the rotating plate and the connecting plate;
• wherein the dust removal device comprises a filter plate fixedly arranged on the inner side wall of the flue gas inlet, the central position of the filter plate is bulged, a limiting plate is fixedly arranged at the central position of the filter plate, a movable rod is movably arranged on the inner side wall of the limiting plate, a fixed block is fixedly arranged on the top of the movable rod, a scraping plate is fixedly arranged on the outer side wall of the fixed block, a return spring sleeves the outer side wall of the movable rod, the bottom of the movable rod penetrates through the limiting plate, and an air pressure assembly is arranged at the bottom of the movable rod;
• wherein the dust discharge mechanism comprises a connecting ring fixedly arranged on the side wall of the flue gas inlet, a dust removal tank is formed in the inner side wall of the connecting ring, a cleaning block is movably arranged on the inner side wall of the dust removal tank, the size of the cleaning block is matched with that of the dust removal tank, the dust removal tank communicates with the flue gas inlet, the end of the cleaning block extends into the flue gas inlet, and a dust discharge pipe is fixedly arranged on the side wall of the dust removal tank.