Environment-friendly desulfurization device for waste gas of power plant

The invention relates to the technical field of desulfurizing towers, in particular to an environment-friendly desulfurizing tower for waste gas of a power plant, which comprises a tower body, a demister, a piston disc, a driving component, a return pipe and a spray pipe, a smoke outlet is arranged at the upper end of the tower body, a gas inlet pipe communicated with the inside of the tower body is arranged on the outer side of the lower part of the tower body, and the demister is arranged on the upper part in the tower body; a piston disc capable of moving up and down and rotating in the tower body is arranged in the tower body, a plurality of circulation holes are formed in the piston disc, and one-way pipes are arranged in the circulation holes. The device is reasonable and compact in structure and convenient to use, the piston disc capable of moving and rotating up and down in the tower body is arranged to extrude a solution downwards, and the solution enters the spraying pipe located on the upper portio