Large ultrafiltration equipment

Ultrafiltration is a membrane separation process based on the principle of sieving and driven by pressure. With a filtration accuracy range of 0.005-0.01μm, it effectively removes particles, colloids, bacteria, heat sources, and high-molecular-weight organic substances from water. It is widely used for the separation, concentration, and purification of substances. The ultrafiltration process does not involve phase transformation and operates at room temperature, making it particularly suitable for separating heat-sensitive substances. It also exhibits excellent resistance to heat, acids, alkalis, and oxidation, and can operate continuously for extended periods at temperatures below 60°C and a pH range of 2-11.

Classification of ultrafiltration membranes

Ultrafiltration membranes are categorized by structure, including plate-and-frame (plate), hollow fiber, nano-membrane surface ultrafiltration, tubular, and spiral-wound membranes. Hollow fiber ultrafiltration is the most mature and advanced form of ultrafiltration technology. Hollow fibers have an outer diameter of 0.4-2.0 mm and an inner diameter of 0.3-1.4 mm. The hollow fiber walls are covered with micropores, with the pore size expressed as the molecular weight of the substance it can retain, ranging from several thousand to several hundred thousand. Raw water is pressurized and flows through the outer or inner cavities of the hollow fibers, forming external-pressure and internal-pressure hollow ultrafiltration membranes, respectively. Ultrafiltration is a dynamic filtration process, allowing retained substances to be removed with the concentrate without clogging the membrane surface, allowing for long-term continuous operation.

Applications of Ultrafiltration Technology

In the early days, industrial ultrafiltration was used for wastewater and sewage treatment. Over the past three years, with the development of ultrafiltration technology, ultrafiltration membrane technology has now been applied in a wide range of fields, including the food industry, beverage industry, dairy industry, biofermentation, biopharmaceuticals, pharmaceutical chemicals, biological preparations, traditional Chinese medicine preparations, clinical medicine, printing and dyeing wastewater, food industry wastewater treatment, resource recovery, and environmental engineering.