Ultrafiltration membrane technology is widely used in water purification, solution separation, concentration, and extraction of useful substances from wastewater, wastewater purification and reuse of the field of high-tech. It is characterized by simple use process, no heating, energy saving, low pressure operation, and small device footprint. Ultrafiltration membrane is the most mature and advanced technology in ultrafiltration membrane technology. Hollow fiber outer diameter: 0.5-2.0mm, inner diameter: 0.3-1.4mm, hollow fiber tube wall is not satisfied with micro-pores, the aperture can be expressed by the molecular weight of the intercepted material, the intercepted molecular weight can reach thousands to hundreds of thousands. Raw water flows under pressure on the outside of the hollow fiber or in the inner cavity to form the external pressure type and the internal pressure type respectively. Ultrafiltration is a dynamic filtration process, and the trapped material can be removed with the concentration of small, without blocking the membrane surface, and can be run continuously for a long time. Ultrafiltration membrane is one of the earliest polymer membranes developed.
1. Introduction of ultrafiltration membrane device
Ultrafiltration membrane technology is widely used in water purification, solution separation, concentration, and extraction of useful substances from wastewater, wastewater purification and reuse of the field of high-tech. It is characterized by simple use process, no heating, energy saving, low pressure operation, and small device footprint.
Ultrafiltration membrane is the most mature and advanced technology in ultrafiltration membrane technology. Hollow fiber outer diameter: 0.5-2.0mm, inner diameter: 0.3-1.4mm, hollow fiber tube wall is not satisfied with micro-pores, the aperture can be expressed by the molecular weight of the intercepted material, the intercepted molecular weight can reach thousands to hundreds of thousands. Raw water flows under pressure on the outside of the hollow fiber or in the inner cavity to form the external pressure type and the internal pressure type respectively. Ultrafiltration is a dynamic filtration process, and the trapped material can be removed with the concentration of small, without blocking the membrane surface, and can be run continuously for a long time. Ultrafiltration membrane is one of the earliest polymer membranes developed.
2. Daily maintenance of ultrafiltration membrane
The ultrafiltration membrane can trap bacteria, but it can not kill bacteria, and the ultrafiltration membrane with the best retention rate can not ensure that the clean area does not grow a bacteria for a long time, and the bacteria may multiply. Directly affect the water quality through, for example, some mineral water products appear translucent filamentary white flocculent bacteria, mainly caused by bacterial contamination of the system. Therefore, it is necessary to regularly sterilize the turnover environment and filtration system, and the operation cycle of sterilization depends on the quality of the raw water supply, for ordinary tap water in the city, 7-10 days in summer, 30-40 days in winter, 20-30 days in spring and autumn. When surface water is used as a source of water, the sterilization cycle is shorter. The sterilized drugs can be used to circulate 500-1000mg/L sodium hypochlorite solution or 1% hydrogen peroxide aqueous solution or soaked for about half an hour.
Ultrafiltration membrane parts should be handled lightly, and pay attention to protection, because ultrafiltration membrane components are precision equipment, so be careful when using installation, to handle lightly, but not to break. If the component is disabled, wash it with clean water first, add 0.5% formaldehyde solution for disinfection and sterilization, and seal it well. If the components should be frozen in winter, otherwise the components may be scrapped.
3. Application of ultrafiltration membrane
(1) pure water and ultra-pure water equipment;
(2) Medical sterile unheated raw water equipment;
(3) Purification of industrial beverages, drinking water and mineral water;
(4) Industrial separation, concentration and purification;
(5) Industrial wastewater treatment, electrophoretic paint, electroplating oily wastewater treatment.
