QJB Type Submersible Mixing Pump Application:
The QJB type submersible mixer is divided into two main series: mixing and low-speed propulsion.
The Mixed Series Agitators are suitable for mixing suspended liquid in wastewater treatment plants and industrial processes.
Low-speed propeller mixers are suitable for industrial and urban wastewater treatment plant aeration tanks, generating a strong water flow with low tangential velocity, which is used for creating water currents in the recirculation, nitrification, denitrification, and phosphorus removal stages.
QJB Type Submersible Mixing Pump Performance Features
1. The QJB type submersible mixer features a compact structure, simple operation and maintenance, easy installation and repair, and a long service life.
2. The impeller features a hydraulic design structure with high work efficiency. The swept-back blades have an auto-cleaning function, preventing debris entanglement and blockage.
3. Mixing with the aeration system can significantly reduce energy consumption, notably increase oxygenation, and effectively prevent sedimentation.
4. The motor winding has an insulation grade of X, a protection grade of IP68, and is equipped with imported bearings and a patented anti-condensation device for the motor, ensuring enhanced safety and reliability in operation.
5. The mechanical seals are made of tungsten carbide-tungsten carbide. All exposed fasteners are made of stainless steel.
QJB Type Submersible Mixing Pump Application Range
The blender should be able to operate continuously under the following conditions.
1) The maximum medium temperature does not exceed 40°C.
2) The medium's pH value is between 5-9.
3) Liquid density not exceeding 1.15 kg/m³.
4) Long-term dive operations, with dive depths generally not exceeding 20 meters.
Selection Considerations for QJB Type Submersible Mixers
Selecting a submersible mixer is a complex task, as the correctness of the selection directly affects the normal operation of the equipment. The principle of selection is to ensure that the mixer performs full mixing functions within an appropriate volume, usually determined by flow rate. According to the different process requirements of wastewater treatment plants, the flow rate of the mixer should be maintained between 0.15~0.3 m/s. A flow rate below 0.15 m/s fails to achieve the desired push flow mixing effect, while a flow rate above 0.3 m/s can impact the process efficiency and lead to waste. Therefore, before selecting, first determine the application of the QJB mixer, such as in sewage pools, sludge pools, or biochemical pools; secondly, consider the medium parameters, such as suspended solids content, viscosity, temperature, and pH value; and also the pool shape and water depth.
Key Points to Note:
The submersible mixer must be fully submerged in water for operation; it cannot be used in environments with flammable, explosive, or highly corrosive liquids. The steel expansion bolts must be securely fastened according to specifications, and the cable must be tightened and securely fastened after installation.
When selecting a dive thruster, if the impeller diameter exceeds 2M, it is recommended to use a gear box reducer.
The required matching power for a submersible mixer is determined by the volume, the density of the mixing liquid, and the mixing depth. One or more mixers are used based on the specific circumstances.
QJB Submersible Mixers Installation System
The dedicated installation system for submersible mixers allows for quick assembly and disassembly without the need to drain the pond's wastewater.
When the pool depth H is less than 4 meters, it is recommended to use System I. The submersible mixer's submersion depth can be adjusted vertically as needed, and the maximum angle it can rotate around the guide rod in the horizontal plane is ±60°. The base, support frame, and lower bracket of the lifting system are all secured with expansion bolts, eliminating the need for pre-drilled holes.
When the pool depth H is greater than 4 meters, it is recommended to use System II, which requires a concrete foundation (or a steel structure base) at the bottom of the pool. The anchoring surfaces of the lifting system base, steel rope bracket, and guide base are all fixed with expansion bolts, without the need for pre-drilled holes. System II uses guide steel ropes instead of guide rods, featuring easy transportation and simple on-site installation. This system fundamentally avoids issues such as bending and deformation of guide rods during transportation, which can affect normal use. It also effectively improves the situation where normal lifting is impossible due to installation errors of the guide rods in pools with excessive depth. It is particularly convenient and reliable for installation under conditions with cantilevered pool tops (as shown in the figure).
When placing an order, please provide the pool depth H and pool type diagram so that the factory can determine the size of the guide rod or guide wire during processing. The material for the installation system is made of stainless steel (or carbon steel). In the installation system, multiple submersible mixers can share a single lifting device, excluding any special requirements from the user.
The QJB mixer's dedicated installation system allows for quick assembly and disassembly of the submersible mixer without the need to drain the pond's wastewater.
Installation System I is only applicable to mixers with a pool depth less than 4m, models QJB0.85/8-260/3-740C and QJB1.5/6-260/3-980C. Among them, I-1 can be adjusted both horizontally and vertically.
System II, III, IV, and VI installations are suitable for pool depths of ≥4m. The guide rod can rotate horizontally around the axis of the guide rod, with a maximum angle of -60° to +60°. When the pool depth exceeds 4 meters, an additional support frame should be added in the middle of the guide rod.
The support brackets and lower brackets are securely fastened to both the pool wall and bottom with steel expansion bolts, no pre-drilled holes required.
The installation system of the submersible mixer offers options in stainless steel and carbon steel with anti-corrosion properties.
Illustration of QJB Submersible Agitator Installation
The guide rod or guide wire should be perpendicular to the horizontal, and can be corrected using a plumb bob.
The hook should be tilted upwards by 5°-10° from the horizontal plane when lifting the submersible mixer.
By adjusting the chain on the hoisting device, the submersible mixer descends along the guide rod or guide wire, keeping the hoisting hook and the center of gravity of the submersible mixer on the same vertical line.
Ordering Instructions for the QJB Type Submersible Mixing Pumps:
Please provide the following detailed data: ①Product name and model of the submersible mixer ②Submersible mixer diameter (mm) ③Submersible mixer head height (m) ④Submersible mixer flow rate ⑤Submersible mixer motor power (KW) ⑥Submersible mixer speed (r/min) ⑦Submersible mixer voltage [V] ⑧Submersible mixer suction height (m) ⑨Whether the submersible mixer comes with accessories, so we can accurately select the model for you.
When the application is critical or the environment complex, please provide design drawings and detailed specifications. Our technical experts will assist in selecting and confirming the appropriate options for you.
After-sales service
We will continue to provide technical services and support to our clients. The duration is generally not less than one week.
Section 2: During the equipment warranty period, in the event of a system failure, our company will dispatch a dedicated person to the equipment's usage site within 24 hours of receiving the customer's formal written notice. 24-hour issue resolution.
Section 3: After the equipment is delivered to the customer and the initial installation and debugging are completed, even after the warranty period of our company has expired, as long as there is an issue with our equipment, regardless of its size, and if the customer requests it, our company will continue to provide service to the customer as usual. All spare parts required by the customer will be provided at the factory price.
4. Our product quality warranty period is 12 months; no warranty for man-made or unintentional damage. The start of after-sales service is from the day the equipment is delivered to the customer.
