In water treatment, environmental protection and industrial production, the efficiency of fluid mixing and driving directly affects the engineering quality and long-term operation costs. For engineers, project managers and purchasers, it is very important to choose reliable diving mixing and propulsion equipment from a professional submersible pump Manufacturer for smooth operation and cost control. Among many options, QJB submersible agitator and propeller are popular because of their excellent performance, stability and cost-effectiveness. Combining authoritative data, detailed specifications, real cases and practical frequently asked questions, this paper makes a comprehensive interpretation of QJB series products, providing valuable reference for industry practitioners.
1. What are QJB Submersible Mixers/Pushers?
QJB submersible agitator and propeller is a professional submersible fluid treatment equipment, which is used for mixing, propelling and circulating liquid media in various water environments. They are widely used in urban sewage treatment, industrial wastewater treatment, landscape water recycling and oxidation ditch technology. Different from traditional surface-mounted equipment, the QJB series adopts an integrated diving design, which can run underwater for a long time, avoiding complicated installation, large floor space and high noise.
QJB submersible mixers rely on the rotation of a high-speed impeller to generate powerful water flow, realize uniform mixing and prevent sludge precipitation; QJB thruster focuses on stable horizontal thrust and is used for large-area water circulation. Both are closely related to mixed flow pump technology, especially pushers, which integrate submersible mixed flow pump advantages for efficient, low-energy, low-noise fluid pushing.
2. Core Specifications and Performance Indicators of QJB Series Products
QJB products stand out because of their accurate and reliable performance indicators, which have been tested by professional laboratories and verified by long-term operation data. Detailed parameters are shown below.
2.1 Rated Power and Thrust Range
QJB submersible mixer: rated power is 0.37 kW-22 kW, thrust is 138 N-3900N, and it is suitable for pools of various sizes, from small industrial wastewater pools to large municipal wastewater pools.
2.2 Medium and Working Environment Requirements
QJB products have good adaptability to media: temperature ≤ 40℃, pH value of 5 ~ 9, density ≤ 1150 kg/m³, and diving depth ≤ 20 m, meeting most water treatment requirements. The optimal pool velocity is 0.15 ~ 0.3 m/s to achieve the best mixing and energy saving, which conforms to the global concept of energy saving and environmental protection.
2.3 Certification Standards and Core Component Technology
QJB Motors adopts F-class insulation and IP 68 protection (tested to IEC 60529) to ensure 24-hour continuous operation without being damaged by water. As a professional submersible pump manufacturer, we strictly control core component quality for long-term reliability.
- Structure: compact direct connection design, high-efficiency submersible motor, precision impeller, flexible installation system and easy to maintain.
- Impeller: high-quality stainless steel/carbon steel precision casting or welding, swept back banana leaf shape, with anti-winding and self-cleaning functions, avoiding the interference of fiber and debris.
- Sealing system: Two independent mechanical seals, bearings with a design life of 100,000 hours, and unique cable seals to prevent water leakage and motor damage.
3. Unique Advantages of QJB Submersible Mixers/Pushers Compared with Competitors
In the highly competitive diving equipment market, QJB products have obvious advantages through optimized design, strict quality control and professional support, with the support of test data and industry research.
3.1 Hydraulic Efficiency and Energy Consumption
Optimized swept impellers produce greater thrust and softer air flow, and the mixing efficiency is improved by 15-20%, and the energy consumption is lower. The new QJBI propeller has a high thrust of more than 30% at the same power. According to the data of the China Pump Industry Association, the energy consumption of QJB is 18% lower than the average level of the industry, which reduces the long-term operating costs.
3.2 Reliability and Maintenance Cost
Dual mechanical seals and 100,000-hour bearings outperform competitors’ single seals and ordinary bearings, extending maintenance cycles and reducing long-term maintenance costs by 30% —critical for continuous-operation large-scale water treatment projects.
3.3 Installation Flexibility and Maintenance
QJB products provide a variety of installation systems (I/II type), with a 60-degree horizontal adjustment function, which can be quickly installed/disassembled without emptying pools. As a professional submersible pump manufacturer, we provide one-stop selection services, customizing optimal configurations to avoid waste or poor performance.
4. Major Application Scenarios and Typical Customer Industry Distribution
According to the statistics of the 500+ cooperation projects in 2024, the top three application industries of QJB products are.
4.1 Municipal/Industrial Sewage Treatment Biochemical Pools (65%)
In anaerobic, anoxic and aerobic tanks, QJB mixers mix media to prevent sludge sedimentation and ensure microbial-substrate mass transfer, which is very important to improve wastewater treatment efficiency and meet discharge standards, especially in A²O processes where a high-performance mixed flow pump is essential.
4.2 Landscape Water Circulation and River Antifreeze (20%)
QJB propeller creates stable water flow, increases dissolved oxygen, prevents precipitation and freezing, and keeps the landscape water clear and in ecological balance.
4.3 oxidation Ditch Process (15%)
QJB-type low-speed mud pushers produce horizontal flow, keep sludge suspended, promote the circulation of mixed liquid, and ensure the stability and treatment effect of the oxidation ditch.
5. Case of Actual Working Conditions: Solving Sludge Sedimentation
A municipal sewage treatment plant’s A²O process suffered severe sludge sedimentation, reducing pool efficiency by 15%, destabilizing denitrification/phosphorus release, and increasing annual cleaning costs to 80,000 yuan.
Our team chose the QJB 4/6-320/3-980/c/s mixers, which were arranged in a rectangular pool with a depth of 6 m by hydraulic simulation. After 3 months, sludge sedimentation was eliminated, the nitrogen removal efficiency was increased by 25%, and the total nitrogen in the effluent was stable, saving the annual cleaning costs.
6. Product Selection Steps and Customer Benefit Calculation Model
6.1 Correct Selection Steps
1. Make clear the application scenario (mixing/pushing) and choose the appropriate QJB mixer or pusher.
2. Provide pool parameters (shape, depth, media characteristics) for preliminary analysis.
3. Clear process requirements (flow rate, mixing effect).
4. Our team carries out hydraulic simulation to determine the power, quantity and installation location of equipment.
5. Confirm the model and additional requirements (extreme environmental design).
6.2 Calculation of Customer’s Interests
Replacing 5 old 7.5 kW mixers with 5 QJB 5.5 kW mixers, which integrate submersible mixed flow pump technology, can save 80,000 kWh/year (running for 8000 hours, 0.8 yuan/kWh) and save 64,000 kWh/year . The difference in equipment price can be recovered in 2-3 years, plus additional savings brought by reducing maintenance and improving treatment.
7. Frequently Asked Questions (FAQ)
Q 1: Does the mixer have to be completely immersed?
A 1: Yes, it is. The motor cooling and sealing lubrication need to be immersed in water; Ground operation can lead to immediate damage to the motor (according to IEC 60529).
Q 2: How to choose the power and quantity?
A 2: Provide detailed cell parameters and technological requirements; Our team carries out hydraulic calculations to achieve the best configuration.
Q 3: What if the impeller is wrapped in fibers?
A 3: stop and cut off the power; Lift for cleaning. The front-end technology adds a fine mesh (with a gap of ≤ 10 mm) to prevent winding.
Q 4: Can QJB products be used in extreme environments?
A 4: The standard products are suitable for ≤ 40℃ and the pH is 5 ~ 9. Custom-made designs (advanced seals, explosion-proof motors) can be used in extreme conditions.
8. Conclusion
QJB submersible mixers and propellers are core equipment of water treatment, and the performance is subject to actual tests. As a professional submersible pumps manufacturer, we provide efficient and energy-saving solutions for urban sewage, industrial wastewater and landscape water.
Integrating submersible mixed flow pump and mixed flow pump advantages, QJB products excel in efficiency, reliability, and flexibility. This article’s data, parameters, cases, and guidance help practitioners use QJB products effectively, supporting smooth water treatment project operation.
