Product Information: Submersible Mixers

The QJB series submersible mixers are available in two main categories: mixing and low-speed propulsion.

The QJB type submerged mixer is divided into two major series: mixing and low-speed thrust flow.

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 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.

Section 2: Brief Introduction to the Structure and Performance Features of Submersible Mixers

1. The mixer features a compact structure, small size, and light weight. It's easy to operate and maintain, quick to install, and has a long service life.

2. Submersible mixers feature self-cleaning blades, preventing debris entanglement and blockage.

3. Used in conjunction with the aeration system, it significantly reduces energy consumption, enhances oxygenation, and effectively prevents sedimentation.

4. The QJB mixer's motor winding is F-grade insulated with an IP68 protection rating. It features one-time lubricated imported bearings with no maintenance required, including oil chamber leakage detection and motor winding overheat protection, ensuring the motor operates safely and reliably.

5. The mechanical seal of the QJB mixer is made of corrosion-resistant carbide tungsten, and all fasteners are made of stainless steel.

Section 3: Uses and Applicable Conditions of Submersible Mixers

The Mixed Agitator Series Submersible Mixers are suitable for various water treatment processes and industrial applications requiring uniform mixing of solid-liquid or solid-liquid-gas three-phase media to maintain a uniform reaction.

The QJB mixer can operate continuously under the following conditions:

1. Maximum medium temperature not exceeding 40°C

pH of the medium is between 5-9

Medium density not exceeding 115 kg/m^3

4 Long-term dive operations, dive depth generally not exceeding 20 meters

4. Considerations for Selecting Submersible Mixers

Selecting the right 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 its mixing function fully within an appropriate volume, usually determined by flow rate. According to the different process requirements of wastewater treatment plants, the optimal flow rate for the mixer should be between 0.15~0.3 m/s. A flow rate below 0.15 m/s fails to achieve the desired plug flow mixing effect, while a flow rate above 0.3 m/s can affect the process efficiency and lead to waste. Therefore, before selecting, first determine the application of the QJB mixer, such as in wastewater ponds, sludge ponds, or biochemical ponds; secondly, consider the medium parameters like suspended solids content, viscosity, temperature, and pH; and finally, the shape and depth of the pond.

The required matching power for a submersible mixer is determined by the volume size, the density of the mixture, and the depth of mixing. A single or multiple mixers are to be used based on the specific circumstances.

5. Submersible mixer installation system

Special installation system for submersible mixers allows for quick assembly and disassembly without draining the pond water.

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 a maximum of ±60° around the guide rod within the horizontal plane. The base, support frame, and lower bracket of the hoisting system are all fixed 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 bases for the lifting system, steel rope brackets, and guide bases should all be secured with expansion bolts, without the need for pre-drilled holes. System II uses guide steel ropes instead of guide rods, offering convenient transportation and simple on-site installation. This system fundamentally avoids the issues of guide 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 especially convenient and reliable for installation under conditions with cantilevered pool tops (as shown in the figure).

At the time of customer 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 customer.

The exclusive installation system for the QJB mixer allows for quick assembly and disassembly of the submersible mixer without the need to drain the pond's wastewater.

Installation System I is applicable only for pools with a depth less than 4 meters, for mixers of 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 or more. The guide rods can rotate horizontally around the axis of the guide rod, with a maximum rotation 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 bracket and lower support are securely fastened to the pool wall and bottom with steel expansion bolts, no pre-drilled holes required.

The installation system of our submersible mixers is available in stainless steel and carbon steel with anti-corrosion options.

Section 6: Submersible Mixers Model Descriptions

??QJBO.85/8-260/3-740/C/S/P/AL

QJB - Submersible mixer (flow driver) pinyin abbreviation

O.85 - Motor Power (KW)

Motor Grade Number

260-----Impeller Diameter

3 - Number of Blades

740 rpm——Rated Speed (r/min)

C/S/P/AL - Material: C stands for cast iron, S for stainless steel, P for polyurethane, AL for aluminum