Circular cooler water tank desilting equipment and method

The invention discloses a desilting device and method for a water tank of a circular cooler. The desilting device comprises a driving assembly, a control assembly, a sludge thickness measuring assembly and a sludge guiding assembly. The driving assembly is connected with a rotating shaft, the end, away from the driving assembly, of the rotating shaft is connected with a circular baffle, the side, away from the rotating shaft, of the circular baffle is coaxially connected with a center hub, and a plurality of desilting grooves are evenly distributed in the outer side face of the center hub in the direction perpendicular to the axis. The desilting groove comprises a bottom plate, one end of the bottom plate is connected to the circular baffle, the other end of the bottom plate is connected to the side, away from the circular baffle, of the outer side wall of the center hub, and the distance between the end, connected to the circular baffle, of the bottom plate and the axis of the center hub is larger than that