Hollow fiber ultrafiltration membrane is a kind of membrane, which is a relatively complete and excellent technology in ultrafiltration technology. The source water flows under pressure on both sides or inner walls of the hollow fibers to form external pressure and internal pressure. Ultrafiltration is a whole process of dynamic filtration. The intercepted chemical substances can be removed as they are concentrated, without clogging the membrane surface, and can run continuously for a long time.

1. Hollow fiber ultrafiltration membrane should be sterilized on time

The uf membrane module can block bacteria, but cannot kill bacteria. No matter how good the blocking rate of the uf membrane module is, it cannot guarantee the bacteria in the clean area for a long time, and the bacteria are likely to multiply. Immediately harm through water. For example, transparent flocculent milky white floccules of Aspergillus flavus clusters often appear in some pure water products, mainly because the system is polluted by the environment of Aspergillus flavus. Therefore, it is necessary to sterilize the natural environment and filtering devices for capital turnover on time. The use cycle of sterilization depends on the condition of the water body that provides the source water. For general drinking water in big cities, 7-10 days in summer, 30-40 days in winter, and 20-30 days in spring and autumn. When groundwater provides water resources, the sterilization cycle is shorter. Sterilization drugs can use 500~1000mg/L sodium hypochlorite solution or 1% hydrogen peroxide solution circulating system to flow or soak for about 30 minutes.

2. Installation and maintenance of hollow fiber ultrafiltration membrane

Hollow fiber ultrafiltration membrane should be handled with care and attention to maintenance. Because the hollow fiber ultrafiltration membrane is a high-precision device, it should be handled with care during application and assembly, let alone damaged. If the component is out of use, first rinse with cold water, add 0.5% formaldehyde aqueous solution for disinfection and sterilization, and the sealing is good. If the components are winter, it is necessary to complete the cold protection solution, otherwise the components are likely to be damaged.
Since each hollow fiber ultrafiltration membrane enters the maintenance solution before shipment, the protection solution in the components should be thoroughly cleaned before use. First, rinse with low pressure (0.1MPa) for 1 hour, and then with high pressure (0.2MPa) for 1 hour. Regardless of whether it is low pressure or high pressure flushing, the production water discharge valve of the system should all be opened.

The hollow fiber ultrafiltration membrane is widely used in the purification of crude salt, the separation and concentration of aqueous solutions, the acquisition of effective chemicals from industrial wastewater, and the purification and reuse of sewage. The characteristic is that the entire application process is simple, does not require heating, saves electric energy, operates at low pressure, and the equipment occupies a small area.