Biofilm packing tankflowmakers QDTM

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Product details

Application scope

The QDTM type packing fluidization propeller is a new type of propeller independently developed and produced by our company. It is used in the fluidized bed biofilm reactor process for water treatment (referred to as MBBR process) to push, stir and mix water, so as to fluidize the biofilm packing. Its features are: The wide three-blade stainless steel impeller can create a powerful water flow field; The lower rotational speed and the thickened arc-shaped outer edge of the blades can effectively prevent the packing from being damaged due to the impact and cutting of the blades on the packing. The integral cylindrical stainless steel casing can minimize the wear of the packing on the casing and has good anti-corrosion performance. The high-torque, high-efficiency planetary helical gear reducer built into the casing features high transmission efficiency, smooth operation and long service life. Make the surface packing enter the water at a certain Angle to achieve the best fluidization state and effectively prevent the deposition of packing and suspended matter. The installation of the underwater guide rods for the system can adapt to various installation and layout forms of pool shapes according to the installation position of the propeller, so as to create the best flow field, eliminate the dead zones of stirring, and achieve a thorough stirring and mixing effect of the water body.

It is applicable to aeration tanks, anaerobic tanks, anoxic tanks in the MBBR process of sewage treatment where different proportions of fillers are added, as well as various biological tanks and sludge tanks without fillers, where suspended solids need to be pushed for flow, stirred and mixed.

Operating conditions

The packing fluidization propeller should be able to operate normally and continuously under the following conditions:

The maximum medium temperature shall not exceed 40°C.

The PH value of the medium is between 5 and 9.

The density of the liquid does not exceed 1150kg/m ³.

The optimal flow rate should be maintained between 0.25 and 0.30m/s.

It operates underwater for a long time, and the diving depth is generally no more than 10 meters.

Note: The equipment should operate entirely underwater and must not be used in flammable, explosive environments or in environments with strongly corrosive liquids.

Precautions

The installation of packing fluidization propellers should be avoided in the following places:

There are obstacles, solid objects and fibrous substances in front of the submersible propeller.

Places where the external water flow is unbalanced;

Places where water level changes exceed the safe working range of the thruster;

The water flow of the submersible propeller is not smooth due to the design problem of the water storage pool.

This is a prerequisite for the continuous operation of the packing fluidization propeller.

When installing, please consider the force that the packing fluidization propeller can achieve (for details, see the product sample).

Structure and Function

Specially designed components can enable the packing fluidization propeller to achieve the best performance.

Junction box

The junction box is completely sealed and isolated from the surrounding liquid and the motor part. The stator of the motor is cooled by the surrounding liquid.

"Motor"

The insulation class of the submersible motor winding is F class, and the protection class is IP68.

Deceleration device

It is built into the casing cylinder and uses a high-efficiency planetary helical gear reducer for transmission, featuring high transmission efficiency to reduce the output speed.

Oil chamber

Lubricate and cool the shaft seal device, and also play a role in water isolation and cooling of the reducer.

Shaft seal

There are two mechanical seal sealing devices, with materials: one silicon carbide-fluororubber and one silicon carbide-nitrile rubber.

Impeller

The impeller is of stainless steel propeller type. The blades are in a wide three-blade form. The thickened arc-shaped outer edge of the blades can effectively prevent the packing from being damaged due to the impact and cutting of the blades on the packing. The blades are designed in a swept-back style and have self-cleaning function. The hub and the shaft transmit torque through keys, making it easy to disassemble and replace during maintenance.

"Casing"

The integral cylindrical stainless steel casing can minimize the wear of the packing on the casing and has good anti-corrosion performance.

When transporting and storing the packing fluidization propeller, it should be placed horizontally or vertically. Make sure the mixer does not roll or tip over.

When lifting the packing fluidization propeller, only lifting equipment such as steel ropes must be used. It is not allowed to use motor cables for lifting.

When storing the thruster for a long time, it is essential to avoid damp and high-temperature environments.

Rotate the impeller by hand from time to time to prevent the sealing rings from sticking together. If the storage time of the packing fluidization mixer exceeds six months, the packing fluidization mixer must be forcibly rotated.

The packing fluidization propeller must be inspected before use after being stored for a long time. Special attention should be paid to the sealing gasket and the cable entry.

After the packing fluidization propeller is installed, it should not be left submerged in water for a long time without operation. It is recommended to run it for at least 4 hours every two weeks to check its functionality and adaptability, or lift it up and store it in a dry place for future use.