As one of the six high-tech technologies in the 21st century, the hollow fiber ultrafiltration membrane has become the standard of the separation process with its distinctive features such as low-pressure actual operation at room temperature, no change, and low energy consumption. The thickness of the membrane filament wall per meter is about 6 billion times. The 0.01μm microporous plate only allows moisture in its diameter. The beneficial minerals and nutrients in water are based on water, and the size of smaller bacteria is above 0.02μm, so bacteria and colloidal solutions are much larger than bacteria.
1. Water treatment steps of hollow fiber ultrafiltration membrane
Drinking water is advanced to ro uf membrane. Due to the pressure difference, many 0.01μm microplates covering the membrane surface only allow water. Facilitate the passage of minerals and nutrients to become filtered water. Bacteria, rust, colloidal solution, fine sand, suspended solids, biological macromolecular substances and other harmful substances are trapped in the ro uf membrane and discharged during cleaning.
2. Cleaning steps of hollow fiber ultrafiltration membrane
After a period of use, the trapped bacteria, rust, colloidal solution, suspended solids, biological macromolecular substances and other harmful substances will rely on the inner surface of the uf membrane module, which will gradually reduce the water production, especially when the drinking water environment is seriously polluted. , It is more likely to cause blockage, and timely cleaning can effectively repair the water production.
3. Factors that harm the water production of hollow fiber ultrafiltration membrane
a. The hazard of temperature on water production: as temperature increases, water activity increases, viscosity decreases, and water production increases. On the contrary, the water production is reduced, so even the same ultrafiltration system has a big difference in water production in winter and summer.
b. The hazard of actual operating pressure on water production: At low pressure, the water production is positively correlated with pressure, that is, the water production increases with the increase in pressure, but when the pressure value exceeds 0.3 MPa, even if the pressure rises again, the water production does not It will increase significantly, mainly because the uf membrane module is compressed under high pressure, and the frictional resistance of water permeability is enlarged.
c. The hazard of seepage turbidity to water production: the greater the seepage turbidity, the less the water production, the greater the seepage turbidity, the more likely it is to cause blockage.
d. The harm of flow velocity to water production: the harm of flow velocity changes to water production is not as obvious as temperature and pressure. The flow rate is slow, it is easy to cause blockage, and too fast will endanger the water production.