How to improve the anti-pollution ability and service life of High pressure film?
Publish Time: 2024-07-19
The following are some methods to improve the anti-pollution ability and service life of High pressure film:
1. Optimize the hydrophilicity of the membrane surface: The hydrophilic membrane surface can form a water-containing layer, weaken the hydrophobic effect between the pollutant and the membrane, and thus reduce the degree of pollution. The hydrophilicity of the membrane surface can be significantly enhanced by using monomers containing hydrophilic groups such as hydroxyl groups and sulfonic acid groups for membrane preparation or surface modification.
2. Regulate the charge of the membrane surface: Make the membrane surface carry the same charge as the pollutant, and use electrostatic repulsion to reduce the adhesion and deposition of pollutants. For example, under neutral pH conditions, the negative charge on the membrane surface helps to reduce organic pollution and delay the silicon scaling process. However, it should be noted that the charge of the membrane surface is also related to water quality conditions such as solution pH, ion type and strength.
3. Select appropriate membrane surface functional groups: The membrane surface functional groups can affect the occurrence of membrane fouling by specifically interacting with pollutants. Avoid using functional groups that are prone to strong interactions with pollutants.
4. Improve the roughness of the membrane surface: Appropriate membrane surface roughness can affect the contact area between the pollutants and the membrane and the hydraulic conditions of the membrane surface during cross-flow filtration. However, care should be taken to avoid a surface that is too rough to prevent increased adhesion of pollutants.
5. Pre-treat the membrane: Before use, pre-treat the membrane appropriately, such as cleaning and disinfection, to remove impurities and pollutants on the membrane surface and keep it in a good initial state.
6. Optimize the quality of the influent water: pre-treat the influent water to remove large particles, colloids, organic matter and other pollutants to reduce the pollution load of the membrane. For example, use methods such as filtration, precipitation, and adsorption.
7. Control operating conditions: including operating pressure, cross-flow velocity, temperature, etc. Appropriate operating pressure and cross-flow velocity help reduce the deposition of pollutants on the membrane surface; and the control of temperature needs to consider the tolerance range of the membrane and the impact on the properties of the pollutants.
8. Clean the membrane regularly: According to the pollution of the membrane, formulate a reasonable cleaning plan, use physical cleaning (such as backwashing) or chemical cleaning methods to remove pollutants on the membrane surface in time and restore the performance of the membrane.
9. Adding antiscaling agents and antibacterial agents: When necessary, add an appropriate amount of antiscaling agents to the influent to inhibit the formation of scale, and add antibacterial agents to control biological fouling. However, it should be noted that the use of these additives should not cause damage to the membrane.
10. Select high-quality membrane materials: When purchasing High pressure film, choose high-quality membrane products with good anti-fouling performance and long service life.
11. Monitoring and maintenance: Regularly monitor the performance parameters of the membrane, such as flux, pressure difference, etc., promptly detect changes in membrane performance, and take corresponding measures for maintenance and adjustment.
12. System design optimization: The design of the entire membrane treatment system should be reasonable to ensure that the layout of the membrane components, the flow channel design, etc. are conducive to reducing the occurrence of membrane fouling and evenly distributing water flow.
By taking the above measures in combination, the anti-fouling ability of the High pressure film can be effectively improved, its service life can be extended, and the stable operation and good treatment effect of the membrane separation process can be guaranteed. At the same time, since the formation of membrane fouling is more complicated and is affected by multiple factors, it is necessary to carry out targeted optimization and adjustment according to the specific application scenario and type of pollution.
