Corrosion-resistant air preheater with explosion-proof capability

The utility model relates to the technical field of air preheaters, and discloses a corrosion-resistant air preheater with explosion-proof capability, which comprises an explosion-proof shell and an explosion-proof upper cover, one side of the explosion-proof shell is provided with an air inlet, the other side of the explosion-proof shell is provided with an air outlet, one end of the explosion-proof shell is provided with a smoke inlet, and the other end of the explosion-proof shell is provided with a smoke outlet. According to the anti-explosion device, the upper fixing ring and the lower fixing ring are closed, so that the inserting blocks are inserted into the inserting grooves for primary connection, then the limiting blocks automatically eject out of the telescopic grooves to be inserted into the limiting grooves under the action that the springs are extruded downwards, and the anti-explosion device is convenient to use. And a pull rod is pulled through external force to enable a limiting block to retra