RisingSun Membrane Technology (Beijing) Co., Ltd

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Sea Water Desalination
- Aug 01, 2018 -

Sea water desalination

After half a century of development, seawater desalination technology has been relatively mature in technology. At present, the main seawater desalination methods include reverse osmosis (SWRO), multi-stage flash (MSF), multi-effect evaporation (MED) and steam distillation (VC). ), etc., and the only methods suitable for large-scale seawater desalination are SWRO, MSF and MED. With the continuous development of membrane technology, membrane technology began to be applied to seawater desalination since the 1960s. However, in this process, due to the membrane fouling problem, the reverse osmosis system has a bottleneck in the treatment of seawater, and the application of ultrafiltration membrane technology can effectively control the seawater quality and provide high quality water inflow for the reverse osmosis system.

For example, Ye Chunsong directly treated high turbidity seawater with a hollow fiber ultrafiltration membrane. The average turbidity of the ultrafiltration membrane was 0.11 NTU, the average value of SDI15 was 2.4, and the average removal rate of COD was 60.0%. The average removal rate is 89.0%, the transmembrane pressure difference is less than 6.0×104Pa, which is much smaller than the maximum operating pressure difference of the ultrafiltration membrane itself of 2.1×105Pa. The ultrafiltration membrane has strong adaptability to seawater with high turbidity and large variation. It can be used as a pretreatment device for seawater reverse osmosis system with high turbid seawater as the influent water.

RisingSun's ultrafiltration membranes have a molecular weight cutoff range of 1000-200,000 Daltons, which can trap large molecular impurities (such as proteins, pigments, polysaccharides, etc.) and pass through the target product; the target product can be retained and small molecular impurities (inorganic salts) , small molecule pigments, monosaccharides, ash, etc.) and water, can also separate target products of different molecular weight, thus replacing the traditional activated carbon decolorization, resin removal, crystal extraction and other purification processes, to achieve the purpose of decolorization, impurity removal and product classification .

We offer a variety of materials and molecular weight cut-off ultrafiltration membrane components, which are compact and have a reasonable surface area to volume ratio. By using different flow channels (13-120 mil), the width of the liquid flow channel can be changed to accommodate liquids of various viscosities. In order to meet the application of certain special industries, we can provide acid and alkali resistant, high temperature resistant and anti-pollution film products.



High thermal stability and chemical stability

Imported raw materials guarantee high quality

No dead angle design, not easy to pollute

Simple membrane module replacement

Various types of membrane components are available

The film core has a high packing density and a low cost per unit membrane area.


Clarification and concentration of fermentation broth in the pharmaceutical and biochemical industries

Whey protein, gelatin, carrageenan, chondroitin sulfate concentration

Industrial water pretreatment and purification and sterilization of pure water and drinking water

Preparation of medical sterile water and water for injection

Separation and purification of traditional Chinese medicine extract

Refined low-alcohol liquor, wine clarification filtration

Oil and water separation