As the core equipment in the sewage treatment process, the selection of the regulating pool submersible mixer directly affects the operational efficiency and energy consumption level of the entire treatment system.Reasonable selection can create suitable water flow conditions, prevent sludge sedimentation, and achieve uniform mixing reaction of solid-liquid gas three-phase media.

This article will systematically explain the five key factors that need to be focused on in the selection process of QJB series regulating pool submersible mixers.

　　1、 Pool characteristics: The decisive influence of shape and size

The geometric shape and volume of the pool are the primary considerations for selecting a submersible mixer. The influence of different pool types on the water flow state is significant, directly related to the power selection and configuration scheme of the mixer.

Circular pools, runway type pools, and circular pools have lower inner wall resistance and better water circulation conditions, so the configuration power can be appropriately reduced by about 10%. On the contrary, square tanks, rectangular tanks, and triangular tanks are prone to generating mixing dead zones, requiring a 10% increase in power configuration to achieve equivalent mixing effects.

The depth of the pool is equally crucial. When the depth of the pool is less than 4 meters, a simple guide rod installation system can be used; When the depth of the pool exceeds 4 meters, a more complex guide wire rope installation system is required, and a support frame may be added in the middle of the guide rod to enhance stability.

　　2、 Media parameters: the core element determining device adaptability

The physical and chemical properties of the processing medium directly affect the working performance and material selection of the submersible mixer. Before selecting, it is necessary to accurately grasp key parameters such as temperature, pH value, density, viscosity, and solid content of the medium.

The regulating pool submersible mixer is suitable for environments where the medium temperature does not exceed 40 ℃ and the pH range is between 5-9. If the temperature or pH value of the medium exceeds this range, special instructions should be provided for the manufacturer to carry out targeted design.

The density of the medium has a significant impact on power selection. For every 10% increase in density, the required power increases by approximately 30%. For high-density media, this factor must be fully considered to avoid motor overload.

The viscosity of the medium is equally important, and different volumes of water tanks have different requirements for viscosity. For example, when the pool volume is between 500-700 cubic meters, the viscosity of the medium that can be processed can reach 1000cP.

　　3、 Flow rate requirement: the key to balancing mixing effect and energy consumption

Flow rate is the core indicator for measuring the mixing effect. According to the different process requirements of sewage treatment plants, the water flow velocity created by the submersible mixer should be maintained within the ideal range of 0.15-0.3m/s.

When the flow velocity is lower than 0.15m/s, the push flow mixing effect cannot be achieved, which may lead to sludge sedimentation; If the flow rate exceeds 0.3m/s, it will cause energy waste and even affect the process efficiency.

For push flow applications, it is necessary to calculate the power consumption per unit flow rate based on the initial flow rate requirements, and then determine the required mixing power for the entire tank by combining the characteristics of the medium and the correction coefficient of the tank type.

　　4、 Equipment configuration: optimized combination of power and impeller

The power range of the regulating pool submersible mixer is from 0.85kw to 15kw, the impeller diameter is from 260mm to 2500mm, and the speed is from 42r/min to 980r/min, forming a complete product series.

According to application requirements, the QJB series can be divided into two types: mixed stirring and low-speed push flow. The mixed stirring type is suitable for occasions that require strong stirring, such as aeration tanks and anaerobic tanks; The low-speed thrust flow pattern is suitable for large volume flow fields and has a wider service range.

When the impeller diameter exceeds 2 meters, it is recommended to use a gearbox reducer to ensure transmission efficiency and equipment lifespan. The impeller design also needs to consider the characteristics of the medium. The swept back banana shaped blade has self-cleaning function, which can effectively prevent entanglement and blockage.

　　5、 Installation and maintenance: an important guarantee for ensuring long-term stable operation

The installation method of the submersible mixer directly affects the performance and maintenance convenience of the equipment. According to the structure of the pool, fixed or mobile installation can be selected, and for open water areas, floating installation can also be chosen.

The installation angle needs to be accurately calculated, and the guide rod or guide wire should be perpendicular to the horizontal plane and can be calibrated with a plumb bob. When lifting, the impeller end should be tilted 5 ° -10 ° above the horizontal plane to ensure that the mixer slides smoothly into the water along the guide rod.

Special attention should be paid to motor protection during equipment maintenance. Regularly check the insulation resistance of the motor, and the voltage should be stable within ± 5% of the rated voltage. For long-distance power supply situations, line loss issues should be considered and the cable cross-sectional area should be appropriately increased.

With the continuous development of water treatment technology, the selection technology of QJB series submersible mixers is also constantly improving. Accurate selection can not only ensure the effectiveness of sewage treatment, but also reduce energy consumption by about 20% and decrease equipment failure rates.

In today's increasingly strict environmental requirements, mastering scientific selection methods is particularly important. By providing detailed operating parameters and process requirements, technical experts can tailor the most suitable submersible mixing solution for you, allowing the equipment to achieve maximum efficiency under optimal operating conditions.