Imported submersible mixer- Overview
A submersible mixer, also known as a sewage treatment mixer or submersible mixer, is a type of mixing machinery mainly used for sewage treatment. It consists of a submersible motor, a sealing mechanism, an impeller (also known as a wheel), an electrical control, etc. It is usually installed underwater using a guide rod. The impeller of the submersible mixer rotates under the drive of the motor, and the stirred liquid generates a rotating jet. The shear stress along the jet surface is used for mixing, causing the liquid outside the jet to produce a stirring effect through friction. At the same time, a volumetric flow is formed during extreme mixing. The large volume flow mode is applied to achieve controlled liquid stirring and pushing flow transportation, achieving full mixing, preventing sedimentation and pushing flow. The mixing effect depends on the density and viscosity of the liquid, the volume and shape of the water tank, and the power and efficiency of the submersible mixer. When the pool is large, two or more submersible mixers need to be used.

Function of submersible mixer
Submersible mixers are mainly used for mixing, stirring, and circulating in municipal, industrial, and urban residential sewage treatment processes, such as activated sludge tanks, biological reaction tanks, mixing tanks, mud storage wells, balance tanks, sewage tanks, etc. They are maintenance equipment for landscape water environments, creating water flow, increasing oxygen content in water, and improving water quality; Effectively prevent the deposition of suspended solids and other situations.

Imported submersible mixerApplication in sewage treatment
(1) Perform hydraulic circulation. In anaerobic tanks, anoxic tanks, oxidation ditches, and other tanks, it is only necessary to provide the necessary circulation flow rate to maintain the suspension of the mixed liquid in the tank, allowing microorganisms to fully contact with the substrate. Through the energy input of the agitator, a continuous circulating water flow is formed. This design not only effectively maintains the suspension of the mixed liquid, but also generates a huge dilution and homogenization ability due to the fact that the flow rate of the circulating water in the tank is usually tens or even hundreds of times higher than the inlet flow rate. Therefore, this reactor has excellent process characteristics of withstanding shock loads.

(2) Improve oxygen transfer efficiency. Aeration is a fundamental means of maintaining the normal metabolism of aerobic microorganisms, and the oxygen transfer efficiency of underwater aeration systems is directly related to water depth. By using a submersible mixer in the aeration tank to design it as a continuous circulation flow tank, the path of releasing "bubbles" from the aeration head will be changed under the action of the circulation flow rate, increasing the "oxygen transfer depth" and improving the oxygen transfer efficiency. Adopting this design can usually increase the oxygen transfer efficiency of the aeration system by about 15%, and also save energy consumption and operating costs in sewage treatment.

(3) Convenient for grid division and segmented processing. When the volume of a single tank is small, each tank can be designed as a square or circular plane, and a sewage treatment mixer can be installed in each tank.

(4) Improve water quality. In many polluted water bodies and deep treatment ponds used for sewage treatment, situations such as large water depth, slow water flow, and inability to meet the dissolved oxygen requirements of deep water areas for surface oxygenation of water bodies are often encountered. A mixer can be set up for "artificial respiration" to improve the water quality of the entire water body. This "artificial respiration" technology is a simple and effective means of improving water quality.