Flue gas dust removal device

The utility model discloses a flue gas dust removal device, which belongs to the technical field of flue gas dust removal equipment, and comprises a box body, one side of the box body is communicated with a gas inlet pipe, the other side of the box body is communicated with an exhaust pipe, the lower surface of the inner wall of the box body is fixedly provided with a rack, the upper surface of the rack is fixedly provided with three U-shaped frames, and the U-shaped frames are fixedly arranged on the inner wall of the box body. The two sides of the rack and the two sides of the U-shaped frames are attached to the inner wall of the box body, filter plates are slidably installed in the two U-shaped frames on the left side, an adsorption plate is slidably installed in the U-shaped frame on the right side, and three sliding grooves matched with the adsorption plate and the two filter plates to slide are formed in the upper surface of the box body in a penetrating mode; the first spraying pipe can spray flue gas