Diving Agitator

QJB type Submersible Mixing Pump Application:

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

The Mixed Series Agitators are suitable for mixing suspended liquid in wastewater treatment plants and industrial processes.

Low-speed Turbulator Series Mixers are suitable for industrial and urban wastewater treatment plant aeration tanks, generating a strong water flow with low tangential velocity, 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 submersible mixer features a compact structure, simple operation and maintenance, easy installation and repair, and a long service life.

2. The impeller features a hydrodynamic design structure with high efficiency. The swept-back blades have an automatic self-cleaning function to prevent debris entanglement and clogging.

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

4. The motor winding insulation is grade, with a protection class of IP68. It features imported bearings and a patented anti-dew device for the motor, ensuring enhanced safety and reliability in operation.

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

QJB Model Submerged Mixing Pumps - Application Range

Mixers should operate normally and 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 dive operations, with dive depths generally not exceeding 20 meters.

QJB Type Submersible Mixers Selection Considerations

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 the mixer performs full agitation in an appropriate volume, generally determined by flow rate. According to the different process requirements of wastewater treatment plants, the mixer's flow rate should be maintained between 0.15~0.3 m/s. A flow rate below 0.15 m/s does not achieve the desired plug flow mixing effect, while a rate above 0.3 m/s affects the process efficiency and leads to waste. Therefore, prior to selection, first determine the application of the QJB mixer, such as in wastewater, sludge, or biochemical ponds; secondly, consider the medium parameters like suspended solids content, viscosity, temperature, and pH; and also the pool shape and water depth.

Key Points to Note:

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 secured after installation.

When selecting a submersible propeller, if the impeller diameter exceeds 2 meters, 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 depth of mixing, with one or more mixers selected 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 pool'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 submersion depth can be adjusted vertically as needed, and it can rotate ±60° around the guide rod in the horizontal plane. The base, support frame, and lower support bracket of the hoisting system are all fixed with expansion bolts on the connecting surfaces of the pool, and no pre-drilled holes are required.

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 fixed with expansion bolts, without the need for pre-drilled holes. System II uses guide steel ropes instead of guide rods, featuring convenient transportation and simple on-site installation. This system fundamentally avoids issues such as bending or deformation of guide rods during transportation, which can affect normal use. It also effectively improves situations where normal lifting is not possible due to installation errors of the guide rods in pools with excessive depth. The installation under cantilevered pool roofs (as shown in the figure) is particularly convenient and reliable.

When placing an order, please provide the pool depth H and pool type diagram to ensure the factory can determine the size of the guide rod or guide wire. 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 customer.

The QJB mixer's dedicated installation system allows for quick assembly and disassembly of submersible mixers 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 in both horizontal and vertical directions.

System II, III, IV, and VI installations are suitable for pool depths of ≥4m. The guide rods 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 bracket and lower support bracket are securely fastened to the pool wall and bottom with steel expansion bolts, no pre-drilled holes required.

The installation system of the underwater mixer is available in stainless steel and carbon steel with corrosion resistance options.

Installation Diagram of QJB Submersible Mixers

The guide rod or guide wire should be perpendicular to the horizontal, and can be corrected using a plumb bob.

The hook should be inclined 5°-10° upwards from the horizontal plane when lifting the submersible mixer.

By adjusting the chains on the hoisting device, the submersible mixer slides down along the guide rod or guide wire, keeping the hoisting hook and the lifting center of the submersible mixer 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 height (m) ⑨ Whether the submersible mixer comes with accessories, so we can accurately select the right 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 location within 24 hours of receiving the customer's formal written notice. 24-hour issue resolution.

Section 3. After the delivery of the equipment to the customer, following the initial installation and 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 we always have. All replacement 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 accidental damage. The start of after-sales service is on the day the equipment is delivered to the customer.