Desulfurization, denitrification and dust removal mechanism for power plant and sealing device

The utility model discloses a power plant desulfurization, denitrification and dust removal mechanism and a sealing device, and relates to the technical field of power plant desulfurization, denitrification and dust removal mechanisms, and the power plant desulfurization, denitrification and dust removal mechanism comprises a supporting assembly which comprises a supporting rod, a supporting frame arranged at one end of the supporting rod and a convex plate arranged on the outer wall of the supporting frame; the processing assembly is arranged on the inner wall of the supporting assembly; and the spraying assembly is arranged at the end part of the processing assembly. According to the device, two times of washing operation are set, so that flue gas is in full contact with water in the treatment box, the desulfurization, denitrification and dust removal effects of the device are greatly improved, and the device adopts a breaking structure, so that dust dissolved in water can be isolated from the treatment box