The main equipment was installed in the cooling tower air cylinder Hydraulic turbines. External hydraulic turbine main components are 304# stainless steel impeller, stainless steel 316L carbon steel shaft and volute hosts. Is an important part of energy conversion guide impeller, circulating water before entering the impeller, Vortex generated by the impeller, further improving energy conversion efficiency of the impeller. Hydraulic turbines based on the 900*900 and lower plate using studs can adjust position