SW30HRI Series: High Desalination for Standard Seawater

1. Product Introduction

The SW30HRI Series is tailored for standard seawater (with TDS ranging from 32000 to 35000mg/L, the most common seawater type in coastal areas), adopting high-purity aromatic polyamide composite materials and a dense selective separation layer design. Its core positioning is to achieve ultra-high desalination rate while ensuring stable water production, solving the problem that ordinary seawater membranes are difficult to maintain high desalination efficiency for a long time in standard seawater environments. The SW30HRI Series is mainly used in various standard seawater desalination systems, which can stably intercept salt ions, heavy metals and organic impurities in seawater, ensuring that the produced water meets strict drinking and industrial water standards. Many coastal desalination projects prefer this series because it can maintain stable high desalination performance under long-term operation, reducing the cost of post-water treatment and ensuring water quality safety.

2. Application Scenarios

The SW30HRI Series: High Desalination  for Standard Seawater is widely used in various standard seawater desalination scenarios, and its application form is adjusted according to the desalination scale and water quality requirements. 

First, coastal municipal seawater desalination. For coastal cities with insufficient fresh water resources, the SW30HRI Series can be used to build municipal seawater desalination systems, converting standard seawater into tap water that meets national drinking water standards, supplementing municipal water supply and ensuring residents' daily water use. 

Second, standard seawater desalination plants. Specialized desalination plants focusing on treating standard seawater can use the SW30HRI Series in batches to form an efficient desalination production line, with stable high desalination rate and large water production, meeting the large-scale fresh water demand of cities and industries. 

Third, coastal industrial water supply. Coastal power, food and chemical industries need a lot of high-quality fresh water. The SW30HRI Series can provide industrial water with low salt content, avoiding equipment corrosion and product quality impact caused by high salt content. 

Fourth, island daily water use. Remote islands with standard seawater around them rely on seawater desalination for daily water. The SW30HRI Series, with its stable high desalination performance and easy installation, can be matched with small and medium-sized desalination equipment to meet the daily water needs of island residents. 

Fifth, offshore living platforms. Offshore oil and gas platforms and marine research platforms need clean fresh water for staff living. The SW30HRI Series can adapt to the offshore standard seawater environment, providing safe and reliable drinking water for on-board personnel.

3. Technical Parameters

The technical parameters of the SW30HRI Series: High Desalination  for Standard Seawater directly determine its desalination performance and adaptability to standard seawater, and the core technical parameters are as follows: 

First, desalination rate: the standard desalination rate is ≥99.5%, which can reduce the TDS of standard seawater (32000-35000mg/L) to below 170mg/L, far exceeding the national drinking water standard. 

Second, operating pressure: the standard operating pressure is 5.0-7.0 MPa, which is matched with the osmotic pressure of standard seawater to ensure high desalination efficiency. 

Third, water production flux: the recommended flux is 16-20 LMH , balancing water production efficiency and membrane service life. 

Fourth, membrane specifications: common specifications are 4040 and 8040, with a membrane area of 7-38 ㎡, suitable for desalination systems of different scales.

 Fifth, service life: under standard operation and maintenance conditions, the service life is 3-5 years, and the annual desalination rate attenuation is ≤1%, ensuring long-term stable performance. 

Sixth, temperature adaptability: it can work stably in the temperature range of 5-45℃, adapting to the seasonal temperature change of coastal standard seawater. Seventh, anti-pollution performance: it has excellent anti-biological pollution and organic pollution performance, reducing the frequency of membrane cleaning.

4. Product Advantages

Compared with ordinary seawater RO membranes, the SW30HRI Series: High Desalination  for Standard Seawater has obvious core advantages, among which high desalination rate and stable performance are the most prominent. 

First, ultra-high desalination rate. The standard desalination rate is ≥99.5%, which is 0.2-0.5% higher than that of ordinary seawater membranes, effectively removing salt ions, heavy metals and harmful impurities in standard seawater, and the produced water quality is superior. 

Second, stable desalination performance. The dense selective separation layer and high-quality membrane materials ensure that the desalination rate does not drop significantly under long-term operation, and the annual attenuation rate is ≤1%, avoiding frequent membrane replacement. Third, strong adaptability to standard seawater. It is specially tailored for standard seawater (TDS 32000-35000mg/L), with reasonable operating pressure matching, ensuring efficient desalination without excessive energy consumption. 

Fourth, high water production quality. The produced water TDS is below 170mg/L, with low conductivity and no peculiar smell, meeting the requirements of drinking water, industrial production and other scenarios. 

Fifth, easy maintenance. It has excellent anti-pollution performance, the cleaning cycle is up to 4-6 months, reducing the operation and maintenance workload and cost. 

Sixth, safe and environmental protection. The membrane material is non-toxic and harmless, no harmful chemical reagents are added during the desalination process, and the discharged concentrated brine has little impact on the marine environment.

5. Application Procedures

The correct application of the SW30HRI Series: High Desalination for Standard Seawater is the key to giving play to its high desalination advantage and ensuring the stable operation of the desalination system. Combining my practical experience in project operation and maintenance, the specific application procedures are as follows: 

First, standard seawater pretreatment. Filter the standard seawater through quartz sand, activated carbon and ultrafiltration membrane to remove suspended solids, colloids and microorganisms, ensure the inlet water turbidity is below 0.5 NTU, and avoid membrane pollution. 

Second, membrane module installation. According to the desalination scale, correctly install the SW30HRI membrane module, ensure the connection tightness, and avoid water leakage and pressure loss. 

Third, system debugging. After installation, flush the system with low-pressure fresh water first, then slowly increase the pressure to the standard operating range (5.0-7.0 MPa), and adjust the flux to 16-20 LMH to ensure stable operation.

 Fourth, daily operation and monitoring. Real-time monitor the operating parameters of the membrane, and adjust the parameters in time according to the slight changes of standard seawater quality. 

Fifth, regular cleaning. When the membrane flux decreases by 10-15% or the operating pressure increases by 15%, use a professional cleaning agent to clean the membrane to remove scaling and pollution and restore membrane performance. 

Sixth, membrane replacement. When the service life expires or the desalination rate drops below 99.0%, replace the membrane module in time to ensure the high desalination effect.

6. Quality Standards

The SW30HRI Series: High Desalination for Standard Seawater must comply with strict international and domestic quality standards to ensure its high desalination performance, stability and safety. Internationally, it follows the ISO 9001 quality management system and ASTM D4516 ; domestically, it complies with GB/T 30307-2013 "Reverse Osmosis Membrane Elements for Water Treatment" and GB/T 5749-2022 "Sanitary Standards for Drinking Water". The core quality standards include: 

First, the standard desalination rate must be ≥99.5%, and the annual attenuation rate shall not exceed 1%. 

Second, the standard operating pressure is 5.0-7.0 MPa, and the error shall not exceed ±3%. 

Third, it must have strong chemical stability and can resist the corrosion of chloride ions and other components in standard seawater without damage. 

Fourth, the anti-pollution performance must meet the standard, and the cleaning cycle shall not be less than 4 months.

 Fifth, the membrane material must be non-toxic and harmless, and the produced water shall not contain harmful substances such as heavy metals, meeting the drinking water standard. 

Sixth, the product must have a complete quality inspection report, and the production process is traceable.

7. Working Principle

The working principle of the SW30HRI Series: High Desalination for Standard Seawater is based on reverse osmosis separation technology, and its high desalination advantage is mainly achieved through the design of a dense selective separation layer. Under the action of external operating pressure (5.0-7.0 MPa), which matches the osmotic pressure of standard seawater, standard seawater flows through the membrane surface. The dense selective separation layer of the membrane has extremely small pores, which only allow water molecules to pass through, while firmly intercepting salt ions (such as sodium ions, chloride ions), heavy metals and organic impurities in seawater. The intercepted impurities form concentrated brine and are discharged from the system, and the passed water molecules are collected and treated to become high-quality fresh water. The key to the high desalination rate of the SW30HRI Series lies in the high density and uniform pore size of its separation layer, which can effectively block even small salt ions, and at the same time ensure the smooth passage of water molecules, balancing high desalination rate and water production efficiency. In addition, the membrane surface is treated with anti-pollution and anti-scaling, reducing the adsorption of impurities and ensuring long-term stable operation.

8. Future Prospects

With the increasing demand for high-quality fresh water in coastal areas and the continuous upgrading of seawater desalination technology, the SW30HRI Series: High Desalination for Standard Seawater will have broader application prospects and development space. First, desalination rate optimization. Continue to optimize the membrane material and separation layer structure, further improve the desalination rate to ≥99.7%, and provide higher quality fresh water. Second, intelligent operation and maintenance. Integrate with the Internet of Things and sensor technology to real-time monitor the membrane's desalination rate, flux and other parameters, automatically adjust operating parameters, and realize intelligent early warning and maintenance. Third, application scenario expansion. Develop small-sized membrane modules to adapt to small-scale standard seawater desalination scenarios, such as coastal rural areas and small offshore fishing boats. Fourth, cost reduction. With the improvement of production technology, the cost of membrane materials will be further reduced, promoting the popularization and application of the SW30HRI Series in more coastal areas. Fifth, green integration. Combine with energy-saving technologies such as energy recovery devices to further reduce the energy consumption of the desalination system, conforming to the global low-carbon development trend.

9. Conclusion

The SW30HRI Series: High Desalination for Standard Seawater is a high-performance seawater RO membrane with high desalination rate as its core advantage, which plays an irreplaceable role in the field of standard seawater desalination. It is specially tailored for standard seawater (TDS 32000-35000mg/L), adopting advanced membrane materials and a dense selective separation layer design, which can achieve an ultra-high desalination rate of ≥99.5%, converting standard seawater into high-quality fresh water that meets drinking and industrial standards. The SW30HRI Series is widely used in coastal municipal desalination, standard desalination plants, island water supply and other scenarios, providing stable and reliable water support for municipal life, industrial production and marine operations. Its performance and quality are affected by technical parameters, application procedures and maintenance level, so it is necessary to formulate targeted application and maintenance schemes according to the actual standard seawater desalination scenario. With the continuous progress of membrane technology and the increasing demand for high-quality fresh water, the SW30HRI Series will be more efficient, stable and intelligent, promoting the healthy development of the standard seawater desalination industry and making greater contributions to alleviating the coastal fresh water crisis.

10. Frequently Asked Questions (FAQs)

Q1: What is the SW30HRI Series: High Desalination Rate, Suitable for Standard Seawater, and what is its core advantage? 

A1: The SW30HRI Series is a high-performance seawater RO membrane specially developed for standard seawater treatment. Its core advantage is ultra-high desalination rate (≥99.5%), which can stably convert standard seawater into high-quality fresh water meeting drinking and industrial standards. 

Q2: What is the applicable seawater type of the SW30HRI Series? 

A2: It is specially suitable for standard seawater with TDS ranging from 32000 to 35000mg/L, the most common seawater type in coastal areas.

 Q3: What is the service life of the SW30HRI Series? 

A3: Under standard operation and maintenance conditions, the service life is 3-5 years, and the annual desalination rate attenuation is ≤1%. 

Q4: Why can the SW30HRI Series achieve high desalination rate? 

A4: It adopts a dense selective separation layer design and high-purity composite materials, which can effectively intercept salt ions and impurities in standard seawater, while ensuring the smooth passage of water molecules. 

Q5: What factors will affect the desalination effect of the SW30HRI Series? 

A5: The main factors include standard seawater quality, operating parameters (pressure, flux), pretreatment effect and membrane fouling.

 Q6: How to maintain the SW30HRI Series to ensure its long-term high desalination effect?

 A6: Do a good job in standard seawater pretreatment to avoid membrane pollution; monitor operating parameters in real time and keep them within the standard range; clean the membrane regularly to remove scaling and pollution; avoid sudden pressure changes during startup and shutdown.