Agitators are suitable for various applications in wastewater treatment, industrial processes, construction, agriculture, aquaculture.

Wastewater treatment applications

Lifting pump station

grit tank

primary sinking pond

biochemical pool

Second sinking tank

Depth processing

Industrial applications

Sludge treatment

agricultural applications

3-phase 380V: 50Hz

Media density: ≤1.10kg/l

PH value: 4~10

Medium temperature: ≤40℃

Diving depth: ≤20m

Motor cooling

When the motor is immersed in water, the heat generated is taken away by the rapidly flowing liquid around it. The cooling effect is better than that in the air, so it has a stronger ability to withstand overload, which is beneficial to ensuring long-term reliable operation of the motor.

Cables and junction boxes

The cable is a heavy-duty rubber-sheathed flexible cable that is resistant to sewage. The cable core cross-section is designed according to the principle of ensuring long-term reliable operation at a temperature of 40C and the motor at full load power. It has a high safety margin and ensures long-term durability and life. The cable rubber sheath and the motor junction box are sealed and compressed to prevent media from penetrating into the motor cavity from the interface between the cable and the motor junction box. There is resin potting between the cable sheath and the wire core. Once the rubber sheath is scratched, it can still effectively prevent media from entering the motor from the cable sheath.

motor

The specially designed submersible motor has a protection grade of IP68 and can be used for a long time at a depth of 20 meters underwater. Class F insulation, maximum temperature resistance up to 155C, safe and reliable.

Protection System

There is a leakage probe in the oil chamber to detect the leakage of the first mechanical seal (in the medium). When the leakage medium reaches a certain proportion in the oil chamber, a signal warning is issued. The thermal element is installed in the stator winding of the motor. If the motor is overloaded for a long time, a signal warning will be issued after the temperature of the motor winding reaches a certain value.

Guide ring (high speed type only)

High-speed mixers can use flow guide rings to reduce shaft power, improve efficiency, reduce vibration, and improve motor heat dissipation.

impeller

Modular structure, select different diameters and appropriate blade angles according to the mixing jet intensity, flow rate and thrust required by the working conditions. The impellers of submersible mixers and submersible reflux pumps are assembled with spherical hubs and welded blades; the submersible flow pushers are assembled with cylindrical hubs and polyurethane (or fiberglass) blades. The blades adopt a back-swept design to avoid fiber entanglement during the mixing process.

Shaft seal

The motor shaft seal uses two independent mechanical seals connected in series to form two reliable sealing lines of defense. The first one is in the mixer inlet medium, relying on the connection between the rotor shell and the oil chamber to prevent large impurities from entering around the machine seal and affecting its normal operation. The hard friction dynamic and static rings adapted to the medium can work normally and durable. The second line is in the oil chamber, which has the effect of doubling the safety and insurance of the motor.

Bearing

There are two bearings at the front and rear of the direct-drive motor shaft or reducer-driven output shaft. A double-row angular contact bearing bears the radial load and bidirectional axial thrust of the propeller. A deep groove ball bearing only bears radial load. . The reasonable design of the bearing improves the bearing carrying capacity.

Oil room

The oil chamber is a barrier that prevents the medium from entering the motor from the pump shaft and prevents the stirring medium from penetrating into the motor. If the first mechanical seal leaks, the oil chamber will act as a buffer so that it cannot directly enter the motor. At the same time, the oil chamber also plays the role of lubricating the friction surfaces of the two machine seals to make them work reliably. And the oil chamber can also cool the heat generated by the bearing and take away part of the heat from the motor (or reducer).

Host part

Traditional selection basis: How much power is required per cubic meter of water [W]

Pool type 1: 10 meters long, 10 meters wide, 5 meters deep, volume 500 cubic meters;

Pool type 2: 25 meters long, 4 meters wide, 5 meters deep, with a volume of 500 cubic meters;

If the two have the same volume, will the number and power of the required mixers be the same?

If: There are columns, retaining walls or large-area aeration heads in the pool, will the number and power of the required mixers still be the same as those in an empty pool?

Disadvantages of the traditional selection model: extensive, not energy-saving, and unstable mixing effect.

An important review shows that so-called “required” mixing intensity levels, such as W/m3, or hp/1000 ft3, are not well defined. These outdated recommendations lack precision. They are either wide-ranging or highly variable, depending not only on process mixing requirements but also on upstream processes, tank design, flow rates, etc.

Most mixing systems produce abundant turbulence, but in flow-controlled mixing applications, the intensity of the volumetric flow determines mixing efficiency. The performance of a submersible mixer is measured by the total thrust generated (N/Newton), which creates the strength of the overall flow. This thrust concept is recognized by the ISO 21630 international standard.

Correct selection of products

The purchase cost of the mixer is only a small part of the life cycle cost of the sewage plant, but it will have a huge impact on the life cycle cost of the entire system. Therefore, the correct selection of the mixer directly affects the total cost of the entire project.

Parameters required for selection:

Providing the most energy-saving solution = correct mixer selection + correct placement

For many operations, mixing comes down to generating a hydrodynamic state that ensures mixing, solids suspension, and solids distribution. The hydrodynamic state, or flow state, in your process depends on the thrust and position/direction of the mixer. Size and layout are key factors in maximizing blender performance. The jets of submersible mixers can be positioned over great distances and adapted to the shape of the tank, which ensures the creation of maximum volumetric circulation.

The size calculation (example) of the mixer is based on the principle of no sedimentation

First calculate the wetted perimeter area of your pool (the wetted perimeter area of the bottom and walls). If your pool is completely covered and filled, include the roof surface area in your calculations. The optimal thrust required to produce a mixed flow regime is equal to the wetted peripheral area multiplied by the shear stress value given in the table below. The shear stress between the tank and the fluid reduces the momentum of the flow, balancing the momentum provided by the mixer every second. The values in the table below were chosen to maintain the desired mixing flow conditions.

Advantages of using CFP

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forecast result

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round

Anaerobic pond

rectangle

anoxic pool

runway type

Aerobic pool, etc.

Non-standard forms, etc.

Rich engineering experience + professional solutions

Using CFD since 2000

effective simulation techniques

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New project risk assessment

Troubleshooting of built projects

The mixer provides a variety of installation methods, such as single guide rod, cantilever fixation, etc., and can be designed according to the actual situation and special needs of the customer’s site.

Single guide rod system

most common

Suitable for almost any pool type

Flexible installation location

Available lifting gear

Cantilever fixing system

The maximum applicable length of the cantilever system is 3 meters

Check the tension and deflection of the guide rod through values such as pool depth, water depth, installation height, and mixer thrust. The bracket design can only be carried out after the guide rod has passed the verification.

Customer provides civil engineering drawings -> mixer selection and layout – guide rod verification – bracket design – customer confirmation drawings – production bracket

Selection report (thrust calculation book)

Recommended layout drawing

Design of guide rod bracket (including calibration)

Installation and maintenance manual & parts list & technical samples

Mixer flow field diagram

Factory test report

CFD analysis report

Professional full-process service