Sewage mixer, also known as submersible mixer or sewage treatment mixer, its working principle is mainly based on the principles of mechanical mixing and fluid dynamics. The following is a detailed analysis of the working principle of the sewage mixer:

First, the basic composition

Sewage mixer is mainly composed of submersible motor, deceleration transmission mechanism, mixer blade (impeller), sealing mechanism, electrical control part and so on. As the power source, the submersible motor converts the high-speed rotation into the low-speed and high-torque rotation of the blade of the mixer through the decelerating transmission mechanism.

Second, the working principle

1. Power drive: After the submersible motor is started, the dynamic torque is generated and transmitted to the mixer blade through the decelerating transmission mechanism.

2. Stirring action: the blade of the mixer rotates at a high speed under the drive of the motor, resulting in a strong mixing effect. This rotating movement causes impurities and particles in the sewage to be fully stirred and mixed to form a uniform suspension. At the same time, the high-speed rotation of the mixer can also form a spiral jet and an axial push flow, which uses the shear stress along the jet surface to mix, so that the liquid outside the jet can stir through friction. This mixing method helps prevent impurities from settling and scaling in the sewage.

3. Aeration and oxygenation: The high-speed rotation of the mixer can also make the sewage produce aeration and oxygenation effect, and improve the dissolved oxygen content of the sewage. This is essential for the subsequent biological treatment process, as sufficient dissolved oxygen facilitates the growth and reproduction of microorganisms, thus speeding up the purification process of sewage.

4. Volume flow formation: Under the action of the mixer, the rotational jet and axial push flow in the sewage jointly form volume flow. This large volume flow mode helps to obtain the necessary water velocity and the required process flow field, ensuring the uniformity and stability of sewage in the treatment process.

Third, application field

Sewage mixers are widely used in urban sewage treatment plants, industrial wastewater treatment stations, river treatment and other fields. In these cases, they play an important role in mixing sewage, preventing precipitation, increasing dissolved oxygen content, and promoting biological treatment processes.

Fourth, summary

The impeller of the sewage mixer is driven by the submersible motor for high-speed rotation, which produces a strong mixing effect, so that the impurities and particles in the sewage are fully stirred and mixed. At the same time, the high-speed rotation of the mixer can also form a spiral jet and axial push flow, improve the dissolved oxygen content of the sewage, and prevent the occurrence of precipitation and scaling. This working principle makes the sewage mixer one of the indispensable and important equipment in the sewage treatment process.