Diving Mixers

QJB type Submerged Mixing Pump Application:

The QJB type submersible mixer is divided into two main series: mixing and low-speed propulsion.

The mixed series agitator is suitable for wastewater treatment plants and industrial processes to agitate liquids containing suspended matter.

Low-speed impeller mixers are suitable for industrial and urban wastewater treatment plant aeration basins, generating strong water currents with low tangential flow, which can be used to create water currents for circulation and stages such as nitrification, denitrification, and phosphorus removal.

QJB Type Submersible Mixing Pump Performance Features

1. The QJB type submerged 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 self-cleaning capabilities to prevent debris entanglement and blockage.

3. Mixing with the aeration system can significantly reduce energy consumption, increase oxygenation levels, and effectively prevent sedimentation.

4. The motor winding has an insulation grade of grade, a protection grade of IP68, and is equipped with imported bearings and a patented anti-condensation device for the motor, ensuring the motor operates more safely and reliably.

5. The two mechanical seals are made of tungsten carbide-tungsten carbide. All exposed fasteners are made of stainless steel.

QJB type submersible mixer, applicable range

The blender should be able to operate continuously under the following conditions:

1) Maximum medium temperature does not exceed 40℃.

2) The medium's pH level is between 5-9.

3) Liquid density not exceeding 1.15 kg/m³.

4) Long-term diving operations, with a diving depth generally not exceeding 20 meters.

Selection Considerations for QJB Type Submersible Mixers

Selecting a submersible mixer is a complex task; the correctness of the selection directly affects the normal operation of the equipment. The principle of selection is to ensure that the mixer performs its mixing function fully within the appropriate volume, generally determined by flow rate. According to the different process requirements of wastewater treatment plants, the mixer flow rate should be maintained between 0.15~0.3 m/s. A flow rate below 0.15 m/s will not achieve the desired plug flow mixing effect, and a flow rate above 0.3 m/s will affect the process efficiency and cause waste. Therefore, before selecting, first determine the application of the QJB mixer, such as in sewage ponds, sludge ponds, or biochemical ponds; next, consider the medium parameters like suspended solids content, viscosity, temperature, and pH value; and also the shape and depth of the pond.

Key Points of Attention:

Submersible mixers must be fully submerged in water for operation; they 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 cables must be tightened and securely fastened after installation.

When selecting a diving propeller, if the blade diameter exceeds 2 meters, it is recommended to use a gear reducer for speed reduction.

The required matching power for a submersible mixer is determined by the volume size, the density of the mixing liquid, and the mixing depth. One or more mixers are used based on the specific circumstances.

QJB Submersible Mixing Pump 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 for installation. The submersible mixer's depth can be adjusted vertically as needed, and it can rotate up to ±60° around the guide rod in the horizontal plane. The base, support frame, and lower bracket of the hoisting system are all fixed with expansion bolts on the connecting surfaces with the pool, without 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 base of the hoisting system, the steel rope fixing frame, and the guide base are all secured 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 the issues of rod bending and deformation during transportation, which can affect normal use. It also effectively improves the situation where normal lifting is not possible 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 the 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, except for the guide rod or guide wire and the lifting base, multiple submersible mixers can share a set of lifting equipment (unless the user has special requirements).

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.

System I is only applicable for mixers with a pool depth of less than 4 meters, models QJB0.85/8-260/3-740C and QJB1.5/6-260/3-980C, where I-1 can be adjusted in both horizontal and vertical directions.

System II, III, IV, and VI installations are suitable for pond 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 pond depth exceeds 4 meters, an additional support frame should be added in the middle of the guide rod.

The support and lower bracket are securely fastened to the pool wall and bottom with steel expansion bolts, no pre-drilled holes required.

The installation system of the submersible mixer offers options of stainless steel and carbon steel with corrosion resistance.

QJB Submersible Mixer Installation Diagram

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 slides down the guide rod or guide wire while keeping the hoisting hook and the lifting center of the submersible mixer aligned on the same vertical line.

Ordering Instructions for QJB Type Submersible Mixers:

Please provide the following detailed information: ① Product name and model of the submersible mixer ② Submersible mixer diameter (mm) ③ Submersible mixer head (m) ④ Submersible mixer flow rate ⑤ Submersible mixer motor power (KW) ⑥ Submersible mixer speed (r/min) ⑦ Submersible mixer voltage (V) ⑧ Submersible mixer suction head (m) ⑨ Whether the submersible mixer comes with accessories, so we can select the correct model for you.

Please provide design drawings and detailed specifications when the application is critical or the environment is complex. 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, with a duration typically not less than one week.

II. During the equipment warranty period, in the event of a system failure, our company will send a dedicated person to the equipment's location within 24 hours of receiving the customer's formal written notice. 24-hour issue resolution

Section 3: Post-delivery of the equipment, after the initial installation and debugging are completed, and beyond the warranty period of our company, as long as there are issues with our equipment, regardless of their size, and upon the customer's request, our company will continue to provide service as usual. All spare parts required by the customer will be supplied at the factory price.

Section 4: Product Quality Warranty: 12 months. Warranty does not cover damage caused by human error or unintentional damage. The start of after-sales service is from the day the equipment is delivered to the customer.