How can Roots blower for sewage treatment save energy?

How to save energy for sewage treatment? Roots blower can adjust the air volume by changing the opening of the valve at the outlet of the blower or adjust the water supply by changing the opening of the regulating valve on the inlet pipeline of the water pump. The biggest feature of fans and water pumps is that the load torque is proportional to the square of the speed. Usually, Roots fans and water pumps in the sewage disposal system are operated by motors at a constant speed.

The shaft power is proportional to the cube of the speed, so if the speed of the motor is adjusted according to the required flow, a large amount of electric energy can be saved. In the sewage disposal system, the main function of Roots blower is to flush oxygen into the biochemical system so that the biochemical system has sufficient oxygen. An online dissolved oxygen meter is placed in the biochemical tank, and water is set on the dissolved oxygen meter.

First of all, according to the energy saving of the sewage disposal station, the working principle of Roots blower is analyzed. The delivered air volume is proportional to the rotational speed. Roots blower is a volumetric fan. The three blade impeller is sucked and exhausted by two impellers for three times every time it rotates. Compared with the two blade impeller, the gas pulse is less, the load change is less, and the mechanical strength is high. Two three blade impellers are set on the two parallel shafts. There is always a small gap between the wheel and the inner hole surface of the elliptical case and between the impellers. Because the impellers rotate in opposite directions at a constant speed, a certain amount of gas surrounded by the case and the impellers is transported from the suction side to the discharge side. Each impeller is always kept in the correct phase by the synchronous gear, which will not touch each other, so it can be high-speed, does not need internal lubrication, and has stable performance, stable operation, simple structure, suitable for a variety of purposes, and has been used in a wide range of fields.