Ultra-filtration is a membrane separation process based on the principle of sieving separation and pressure as the driving force. The filtration accuracy is within the range of 0.005-0.01μm, which can effectively remove particles, colloids, bacteria, heat sources and polymer organic substances in water. It can be widely used in the separation, concentration and purification of substances. The ultrafiltration process has no phase inversion and is operated at room temperature. It is particularly suitable for the separation of heat-sensitive substances. It has good temperature resistance, acid and alkali resistance and oxidation resistance. It can be continuous for a long time under the conditions of below 60℃ and pH 2-11. use.
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The choice of ultrafiltration membrane is determined according to user requirements. According to the structure of ultrafiltration membrane, it is divided into plate and frame type (plate type), hollow fiber type, nano membrane surface ultrafiltration membrane, tube type, roll type and other structures. Among them, the hollow fiber ultrafiltration membrane is a relatively mature and advanced form of ultrafiltration technology. The outer diameter of the hollow fiber is 0.4-2.0mm, and the inner diameter is 0.3-1.4mm. The wall of the hollow fiber tube is full of micropores. The pore size is expressed by the molecular weight of the material that can be retained, and the molecular weight can be cut off from thousands to hundreds of thousands. The raw water flows under pressure on the outside of the hollow fiber or the inner cavity to form an external pressure type and an internal pressure type hollow ultrafiltration membrane respectively. Ultrafiltration is a dynamic filtration process. The retained substances can be removed with the concentrate without clogging the membrane surface, and it can run continuously for a long time.
•Ultrafiltration membrane mainly removes bacteria, colloids, suspended solids, proteins and other macromolecular substances in water quality, and does not make any changes to trace elements in water quality.
•Ultrafiltration equipment is powered by pressure and uses different apertures to separate impurities in water quality.
•Ultrafiltration equipment can be used in the production of mineral water and mountain spring water, provided that the raw water is of good quality and does not contain any harmful trace elements.
Ultrafiltration equipment can also be used between pretreatment and reverse osmosis as a pretreatment.
Ultrafiltration equipment, the main application areas involve food, beverages, biopharmaceuticals, fine chemicals, industrial wastewater treatment and reuse, surface water pretreatment, reclaimed water reuse, etc.