Aeration device

The aeration device comprises a regeneration tank, a liquid inlet part and an air inlet part, the regeneration tank comprises a first overflow tank, a second overflow tank and a third overflow tank, the sectional area of the second overflow tank is larger than that of the first overflow tank, and the sectional area of the third overflow tank is larger than that of the second overflow tank. The top end of the first overflow groove is higher than the bottom end of the second overflow groove, and the top end of the second overflow groove is higher than the bottom end of the third overflow groove. A plurality of liquid inlet parts are arranged, and each liquid inlet part comprises a liquid inlet pipe; the air inlet part comprises an air inlet pipe; an aeration disc is arranged at the end part of the air inlet pipe. According to the utility model, the desulfurization liquid enters the regeneration tank from the plurality of liquid inlet parts, so that the reaction positions are uniformly distributed, and the local