Due to their unique structural design and performance advantages, high-pressure membranes play a crucial role in membrane separation technology, handling separation tasks requiring high osmotic pressure, high concentration, and high purity. Their applications span water resource development, industrial wastewater treatment, biopharmaceutical purification, and energy-related fields, making them a key technology supporting clean production and resource recycling.
In water treatment, high-pressure membranes are a core component of large-scale seawater desalination. With their stable operation under pressures of several megapascals and even higher, reverse osmosis high-pressure membranes can overcome the extremely high osmotic pressure of seawater, converting raw water with a salt content of tens of thousands of milligrams per liter into freshwater that meets national or international drinking water standards, satisfying the water supply needs of coastal cities and island regions. Simultaneously, in brackish water desalination and high-salinity groundwater purification, high-pressure membranes can efficiently retain calcium, magnesium, and sulfate ions, improving the taste and usability of the water.
Industrial wastewater treatment is another important application area for high-pressure membranes. For high-salt organic wastewater generated by industries such as chemical, power, and metallurgy, high-pressure membranes can complete salt concentration and freshwater recovery in zero-discharge or near-zero-discharge processes, converting wastewater into reusable process water or compliant discharge water, significantly reducing the energy consumption and cost of evaporation and crystallization. In landfill leachate treatment, high-pressure membranes can also retain ammonia nitrogen, heavy metals, and recalcitrant organic matter, improving the stability of effluent quality.
In the biopharmaceutical and fine chemical industries, where the requirements for separation purity are extremely stringent, high-pressure membranes play a crucial role in purification and solvent recovery. The separation of antibiotics, peptides, and enzyme preparations can achieve precise separation of active ingredients and impurities through high-pressure reverse osmosis or nanofiltration, ensuring product yield and quality. In the refining of traditional Chinese medicine extracts, high-pressure membranes can remove large molecular pigments and colloids, improving the purity of the extract. Furthermore, high-pressure solvent-resistant membranes can operate stably in systems containing organic solvents such as alcohols, ketones, and esters, achieving solvent recovery and material concentration, reducing hazardous waste generation.
In energy and resource recovery, high-pressure membranes are used in oilfield produced water treatment to remove oil and salt to meet reinjection or discharge requirements. In the extraction of resources such as lithium and potassium, high-pressure membranes can assist in the separation and concentration of brine from salt lakes, improving the recovery rate of valuable elements.
With advancements in new materials and processes, the application scope of high-pressure membranes is expanding into emerging fields such as electronic-grade ultrapure water preparation and the treatment of recycled liquids from new energy batteries, demonstrating broad adaptability across industries and media, and its continued development potential.
