Device for increasing temperature drop of cooling tower of circulating water system

The utility model discloses a device for improving temperature drop of a cooling tower of a circulating water system, which comprises the cooling tower and a spraying plate, the spraying plate is arranged in the cooling tower and used for introducing hot water for cooling, the bottom and the top of the cooling tower are respectively provided with an air inlet and an air outlet, and the bottom of the cooling tower is provided with a double-layer dust-free single-drive cooling structure. The double-layer dust-free single-drive cooling structure is located at the bottom of the spraying plate and blocks the middle section area of the cooling tower, the double-layer dust-free single-drive cooling structure comprises a conical water collecting barrel blocking the middle section area of the cooling tower and a secondary cooling box used for introducing external cold air, and the secondary cooling box is arranged at the bottom of the conical water collecting barrel; a backflow water concentrating disc is arranged at