Jiangsu Du'an Environmental Protection's QJB Low-Speed Push Flow Mixers are suitable for industrial and urban wastewater treatment plant aeration and anaerobic ponds. They generate strong water currents with low tangential flow, which can be used for water circulation in the pond and to create water currents for stages such as nitrification, denitrification, and phosphorus removal. The selection of a submersible mixer is a relatively complex task, and the correctness of the selection directly affects the normal operation of the equipment. The principle of selection is to allow the mixer to fully function in an appropriate volume, which is generally determined by the flow rate. According to the different process requirements of wastewater treatment plants, the flow rate for mixer selection should ensure thatFlow rates between 0.15 to 0.3 m/s are ideal for efficient mixing; below 0.15 m/s, the mixing effect is insufficient, and above 0.3 m/s, the process efficiency is compromised, leading to waste. Therefore, prior to selection, it's crucial to determine the application of the submersible mixer, such as wastewater, sludge, or biochemical ponds. Next, consider medium parameters like suspended solids content, temperature, pH level, and the pool's shape, water depth, and installation method, all of which impact selection. Energy-saving considerations are also vital as they affect future operational costs. The required power for the mixer is determined by the volume, density of the liquid, and mixing depth, with one or more mixers selected based on specific conditions.
Jiangsu Du'an Environmental ProtectionSubmersible Low-Speed Flow Propeller Structural Design
1. The junction box is completely sealed and insulated from surrounding liquids and motor components; Cooling: The motor stator is cooled by the surrounding liquid.
The 2 gears utilize planetary gear transmission to reduce the impeller speed.
3Low-speed Flow ControllerThe blades are in a double banana shape, cast from aluminum alloy, effectively preventing blade breakage; the import edge of the blade is bent backward, featuring...Long-termAutomatic cleaning performance; secured with lock nuts on the shaft, easy to disassemble and replace during lifting and maintenance.
4Low-Speed Turbulence PromoterThe motor utilizes a full-submersion squirrel-cage induction motor, with the submersible motor winding's insulation grade beingF rating, protection class IP68. Per minute.Please provide the Chinese content that needs to be translated into American English.High RPM not to exceedThe motor can run continuously and can start at least 12 times per hour without causing any harmful effects.
5Low-Speed TurbulatorThe oil chamber lubricates and cools the sealed unit, bearing housing, and the reducer box between the motor and the liquid. It serves as a shock absorber and noise reducer. A bladder device can be installed as needed to reduce and lower the pressure increase within the oil chamber.
6Low-Speed Flow ControllerBearings for the motor shaft are supported by two bearings, with the supporting bearings being double-row ball bearings; while the main bearing is a double-row spherical roller bearing; the impeller shaft is supported by a double-row angular contact ball bearing and a cylindrical roller bearing; the operating life of the stirrer bearing is greater than60,000 hours.
7Low-Speed Flow ControllerThe shaft seal mixer consists of two mechanical seals and one lip seal. Seal device materials: Tungsten Carbide.Tungsten Carbide.
8Low-speed Turbulence PromoterEach shaft assembly is equipped with a serially connected double-layer independent rotating shaft mechanical sealing system. The sealing device operates within a single oil tank. The mechanical sealing design has a service life exceeding25,000 hours.
9Low-Speed TurbulatorThe monitoring system features two thermosensitive switches installed in the stator winding.At 125℃ operation, the motor's temperature should not exceed 80℃ under normal conditions. The 10 control system control box features self-protection for the equipment, with overheat, overcurrent, and leakage protection functions, and can accommodate PLC interfaces.
Low-Speed Flow ControllerMaterial Enclosure GG25 Cast Iron Impeller Composite Polyurethane Spindle Stainless Steel ASTM420 -- Tungsten Carbide Mechanical Seal Tungsten Carbide Rod Stainless Steel ASTM304 Lifting Bracket Stainless Steel ASTM304 Lifting Cable Stainless Steel ASTM304 Static Seal Material Nitrile Rubber Fasteners Stainless Steel ASTM321
Duwan Environmental QJBPrinciples for Selecting Submersible Flow Pumps
Midwest Priority Principle
2. System Priority Principle
3. Length-First Principle
4.Recirculating Water Flow Principle
