Application of Pumpseen rotor pump in submerged membrane treatment

In recent years, the submerged ultrafiltration membrane treatment has been applied more and more in the field of tap water treatment and sewage treatment. In the submerged membrane treatment process, the membrane is the barrier that separates the two phases and acts as a selective transfer material, and the CAM pump is located at the back end of the membrane pool, providing negative pressure, so that the untreated tap water flows through the ultrafiltration/microfiltration membrane under the action of negative pressure attraction, and the suspended matter in the water, bacteria and other macromolecular microorganisms are isolated in the outer layer of the membrane. The filtered water is discharged through a CAM pump and enters the pipe. When the concentration in the membrane pool gradually increases and the retention on the outer surface of the membrane filaments accumulates, resulting in an increase in the transmembrane pressure difference, the system needs periodic backwashing. During backwashing, the CAM pump is reversed to flush the membrane group with the produced water in the main outlet, and at the same time, the contaminated matter is flushed away from the membrane filament and into the membrane pool.

As a strong and easy to maintain pump, Pumpseen pumps are found in most industrial fields: sewage treatment, chemical, construction, petroleum, recycling, shipping and so on. A typical application point is the membrane treatment system, because the membrane treatment system needs to pressure the liquid through the semi-permeable film, so the need for a suitable pump system to produce positive or negative pressure, CAM pump has good self-priming performance, pressure stability, positive and reversible transport characteristics, is a very ideal pump type in membrane engineering.

First, choose the CAM pump as the reason for the negative pressure suction pump in the submerged film treatment

1. The CAM pump has good self-priming performance: the membrane component is immersed in the membrane pool, and the tap water needs to be sucked by a pump with good self-priming performance. Under the action of water pressure, the tap water is filtered through the membrane filament, and then discharged by the pump.
2. Positive and negative operation: After the membrane component is used for a period of time, impurities such as suspended substances in the water will be more adsorbed on the surface of the membrane filament, if not cleaned in time, it will not only affect the water quality after treatment, but also affect the service life of the membrane. In order to save space and equipment procurement costs, a pump is required to realize the three functions of negative pressure suction, forward discharge and recoil at the same time.
3. Flow is easy to control: in the membrane treatment process, the flow rate of the forward row and the backwash process is very different, and the frequency converter is needed to adjust the flow. CAM pump has a flow and speed is proportional to the relationship, to achieve flow control.
4. No pollution: For the membrane treatment of drinking water, the water quality has been significantly improved through the filtration of the membrane silk, so it is not allowed to damage the good water quality during the pumping process.
5. The outlet pressure of the CAM pump is stable, and the force on the membrane is stable.
6. Easy maintenance, easy maintenance, fewer parts, low operating costs.

Second, Pumpseen CAM pump in the application of submerged film processing cases

The water quality after membrane treatment in a water plant reached the newly issued “sanitary Standard for Drinking Water”. The project mainly includes submerged ultrafiltration membrane filtration system, chemical cleaning of ultrafiltration system, charcoal dosing system, potassium permanganate dosing system and other parts. Four sets of Pumpseen CAM rotor pumps are used in the ultrafiltration membrane filtration system.

Technical data sheet of negative pressure suction pump:

Table 1 Technical data sheet of negative pressure suction pump

Material table of negative pressure suction pump:

Table 2 Material table of negative pressure suction pump

After the project is put into operation, the good performance of the Pumpseen rotor pump is suitable for the required working conditions. During the operation of the Pumpseen rotor pump, the pressure remains constant and will not change with the change of speed. This constant pressure characteristic ensures that the film filament will not be damaged due to the instability of the force. In addition, the characteristics of online maintenance of the Pumpseen rotor pump greatly reduce the cost and save time in the later operating overhaul of the pump.

Recently, membrane separation technology has been widely used, and the market demand for membrane components, components and equipment is increasing rapidly. Especially in water treatment technology, membrane separation technology is the most effective solution for water resources reuse and water quality protection, and has played an important role in improving the contribution rate of the industry.