One Product information of QJB submersible thruster

The QJB submersible thruster consists of two series of products: mixed mixing and low-speed thrust flow.
The QJB submersible mixer can be divided into two series: mixing and low-speed push flow.
The mixing series mixer is suitable for mixing liquids containing suspended solids in sewage treatment plants and industrial processes;
The low-speed push flow series mixer is suitable for aeration tanks in industrial and urban sewage treatment plants. It produces strong water flow with low tangential flow, which can be used for circulation, nitrification, denitrification, and phosphorus removal stages to create water flow.

II Introduction to the structure and performance characteristics of QJB submersible thruster

1. The structure of submersible thrusters is compact, small in size, and lightweight. Easy operation and maintenance, convenient and fast installation, and long service life.
2. The blades of the submersible thruster have self-cleaning function, which can prevent debris from entangling and blocking.
3. When used in conjunction with an aeration system, energy consumption can be significantly reduced, oxygen filling can be significantly increased, and sedimentation can be effectively prevented.
4. The motor winding of the submersible thruster is F-class insulated with a protection level of IP68. It uses imported bearings that require one-time lubrication and maintenance free, and has oil chamber leakage detection and motor winding overheating protection functions, making the operation of the motor safer and more reliable.
5. The friction material of the mechanical seal of the submersible thruster is corrosion-resistant tungsten carbide, and all fasteners are made of stainless steel.
III The purpose and applicable conditions of QJB submersible thruster

The mixed stirring series submersible thruster is suitable for various water treatment processes and industrial processes that require maintaining uniform mixing and reaction of solid and liquid two-phase or solid, liquid, and gas three-phase media.
Low speed thrusters can operate continuously under the following conditions:
The maximum medium temperature shall not exceed 40 ° C
The pH value of the two media is between 5-9
3. Medium density not exceeding 115KG/M ^ 3
Long term diving operation of low-speed thrusters, with a diving depth generally not exceeding 20 meters
4 Selection considerations for QJB submersible thrusters
The selection of submersible thrusters is a complex task, and the correctness of the selection directly affects the normal use of the equipment. As a principle of selection, it is necessary to ensure that the mixer can fully perform its mixing function in the appropriate volume, which can generally be determined by the flow rate. According to the different process requirements of sewage treatment plants, the optimal flow rate of the mixer should be ensured between 0.15~0.3m/s. If the flow rate is lower than 0.15m/s, the push flow mixing effect cannot be achieved. If the flow rate exceeds 0.3m/s, it will affect the process effect and cause waste. So before selecting, first determine the location where the low-speed thruster will be used, such as sewage tanks, sludge tanks, and biochemical tanks; Next are the parameters of the medium, such as suspended solids content, viscosity, temperature, and pH value; Also, the shape and depth of the pool.
The required matching power for a submersible thruster is determined by the volume, density of the mixed liquid, and mixing depth, and one or more mixers are used depending on the specific situation.
Five Installation system of QJB submersible thruster
The specialized installation system for low-speed thrusters can quickly install and disassemble submersible mixers without the need to discharge sewage from the pool.
When the pool depth H is less than 4 meters, it is recommended to use installation system I. The diving depth of the submersible mixer can be adjusted vertically as needed, and the maximum angle that can rotate around the guide rod in the horizontal plane is ± 60 °. The lifting system base, support frame, and lower bracket are all fixed with expansion bolts at the associated interface with the pool, without the need for reserved holes.
When the pool depth H is greater than 4 meters, it is recommended to use installation system II, which requires a concrete foundation (or steel structure base) to be built at the bottom of the pool. The lifting system base, steel rope fixing frame, and guide base are all fixed with expansion bolts at the associated interface with the pool, without the need for reserved holes. The installation system of low-speed thruster II uses guide steel rope instead of guide rod, which has the characteristics of convenient transportation and simple on-site installation. This system fundamentally avoids the situation of guide rod bending and deformation caused by transportation, which affects normal use, and effectively improves the phenomenon of inability to lift due to installation errors of guide rods when the pool is too deep. Under the installation conditions with a cantilevered pool roof (as shown in the picture), it appears more convenient and reliable to operate.
When the customer places 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 of the installation system is made of stainless steel (or carbon steel). In addition to guide rods or guide wires, and lifting bases, multiple QJB thrusters can share a set of lifting devices in the installation system (except for special user requirements).
The dedicated installation system of QJB thruster can quickly install and dismantle submersible mixers without the need to discharge sewage from the pool;
Installation system I is only applicable for pool depths<4m, with models including QJB0.85/8-260/3-740C and QJB1.5/6-260/3-980C mixers. I-1 can be adjusted in both horizontal and vertical directions;
Installation systems II, III, IV, and VI are suitable for pool depths ≥ 4m. The guide rod can rotate horizontally around the axis of the guide rod, with a maximum angle of -60 °~+60 °. When the pool depth is greater than 4m, a support frame should be added in the middle of the guide rod;
The support frame and lower bracket are fixed to the pool wall and bottom with steel expansion bolts, without the need for reserved holes;
The installation system material of QJB thruster adopts stainless steel and carbon steel anti-corrosion options;
VI Model description of QJB submersible thruster
QJBO.85/8-260/3-740/C/S/P/AL
QJB - Pinyin abbreviation for submersible mixer (submersible thruster)
O. 85---- Motor power (KW)
8-- Number of motor stages
260- Impeller diameter
3-- Number of leaves
740-- Rated speed (r/min)
C/S/P/AL - Material: C represents cast iron, S represents stainless steel, P represents polyurethane, AL represents aluminum