SWC4+/SWC5+: Enhanced Seawater Membrane & RO Membrane Overview

SWC4+/SWC5+: Enhanced Seawater Membrane & RO Membrane Overview

SWC4+/SWC5+: Enhanced Seawater Membrane is an upgraded high-performance composite reverse osmosis membrane developed for harsh seawater desalination scenarios, with "enhanced anti-fouling, high desalination rate and long service life" as its core positioning.

1. Product Introduction

SWC4+/SWC5+: Enhanced Seawater Membrane is an upgraded high-performance composite reverse osmosis membrane developed for harsh seawater desalination scenarios, with "enhanced anti-fouling, high desalination rate and long service life" as its core positioning. Based on the classic seawater membrane technology, it adopts upgraded modified aromatic polyamide composite material and optimized membrane structure design, which effectively solves the pain points of easy fouling, insufficient desalination stability and short service life of traditional seawater membranes in high-salt, high-impurity seawater environments. It can maintain stable operation under complex marine conditions such as high salt content (35000mg/L), large temperature fluctuations and high organic impurity content, and is a reliable core component for various seawater desalination projects.

2. Application Scenarios

SWC4+/SWC5+ enhanced seawater membrane is mainly used in various seawater desalination scenarios with high requirements for membrane performance. In coastal municipal water supply, it is applied to large-scale seawater desalination plants to provide clean drinking water for coastal residents. In offshore oil platforms and marine engineering, it treats seawater into domestic and production water to meet the daily needs of platform staff. In island areas without fresh water resources, it is matched with small and medium-sized desalination equipment to solve the basic water needs of residents. In industrial production, it is used for high-salt water treatment in chemical and petrochemical industries to realize water recycling. In addition, it is suitable for emergency water supply scenarios such as maritime rescue and coastal disasters, showing strong environmental adaptability.

3. Technical Parameters

The technical parameters of SWC4+/SWC5+ are optimized for enhanced performance: membrane material is upgraded modified aromatic polyamide composite membrane; membrane structure is spiral wound, effective membrane area is 40.9m²; operating pressure ranges from 5.5MPa to 8.3MPa; operating temperature is 5℃ to 45℃; pH adaptation range is 2.0 to 11.0, cleaning pH can reach 1.0 to 13.0; nominal desalination rate is ≥99.8%, minimum desalination rate is ≥99.7%, and boron rejection rate is ≥91.0%; membrane flux is 42-60 L/(m²·h) under standard conditions; service life is 4-6 years under normal maintenance; maximum inlet SDI15 is 5.0, maximum inlet turbidity is 1.0NTU; maximum inlet chlorine concentration is 0.1mg/L, ensuring stable operation in harsh seawater environments.

4. Product Advantages

The core advantages of SWC4+/SWC5+ lie in enhanced performance in three aspects: First, enhanced anti-fouling ability. The upgraded membrane surface modification technology reduces the adsorption of colloids, microorganisms and organic impurities, reducing chemical cleaning frequency to once every 6-8 months. Second, ultra-high desalination stability. The desalination rate is stably maintained at ≥99.7%, and the boron rejection rate reaches 91.0%, ensuring the produced water meets high standards. Third, enhanced durability. The optimized membrane structure and high-quality materials improve corrosion resistance and mechanical strength, extending service life by 1-2 years compared with traditional seawater membranes. In addition, it has high flux and low energy consumption, balancing desalination efficiency and energy saving.

5. Application Procedures

The application procedure is standardized and easy to operate: First, conduct strict pretreatment of seawater, including filtration, sedimentation, disinfection and anti-scaling treatment, to remove large particles and impurities and avoid membrane damage. Second, install the membrane module correctly according to the system design, ensuring tight pipeline connection and no leakage. Third, start the system, adjust pressure, temperature and recovery rate to standard ranges, and conduct 2-3 hours of trial operation. Fourth, regularly monitor desalination rate, flux and differential pressure during operation, and record data. Fifth, conduct chemical cleaning when flux decreases by more than 20% to restore performance. Finally, shut down regularly for maintenance, check for damage and replace aging parts if necessary.

6. Quality Standards

Production and detection strictly follow ISO 20466:2024 and national seawater membrane standards. High-quality modified aromatic polyamide materials are selected, which are non-toxic and corrosion-resistant. Production is carried out in a 100-level clean workshop, with strict control over each link from material mixing to membrane curing. Finished products undergo strict tests including desalination rate, anti-fouling performance and chemical stability. Each membrane is vacuum-sealed with protective liquid (≤1.0% sodium bisulfite) and tested qualified before leaving the factory.

7. Working Principle

The working principle is based on optimized reverse osmosis. Under high pressure higher than seawater osmotic pressure, the semi-permeable membrane selectively allows water molecules to pass through, while intercepting salt ions, boron and other impurities. Its ultra-small pore size (0.0001-0.001 microns) and modified surface charge repel charged impurities through electrostatic action, improving desalination and boron rejection effects. The whole process is chemical-free, energy-saving and environmentally friendly, and is an efficient seawater desalination technology.

8. Future Prospects

With the global water shortage becoming more serious, the demand for seawater desalination is growing. SWC4+/SWC5+ will continue to be optimized: membrane modification technology will be upgraded to further improve desalination rate and anti-fouling ability; targeted products will be developed for different seawater qualities; intelligent monitoring will be integrated to realize real-time operation monitoring and automatic maintenance, reducing manual intervention and promoting the development of the seawater desalination industry.

9. Conclusion

SWC4+/SWC5+: Enhanced Seawater Membrane effectively solves the pain points of traditional seawater membranes with enhanced anti-fouling, high desalination stability and long service life. It has standardized operation, strict quality control and wide application scenarios, meeting the needs of various seawater desalination projects. Its performance has been fully verified in practice, and it will have broader prospects with technological progress, providing reliable support for global seawater desalination.

10. Frequently Asked Questions (FAQs)