Reverse osmosis membrane technology has shown excellent performance in the advanced treatment of coal chemical wastewater

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With the transformation and upgrading of China's energy industry structure, the coal chemical industry, especially the development of coal to ethylene glycol project, has attracted much attention. However, while the coal chemical industry is developing rapidly, it also faces the problem of the contradiction between supply and demand of water resources. Due to the dislocation of the spatial distribution of coal resources and water resources in China, coal chemical enterprises produce a large amount of wastewater in the operation process, which is characterized by large amount of water and complex water quality, especially for COD (chemical oxygen demand), hardness and conductivity.

In the process of recycling treatment of coal chemical wastewater, the problem of high hardness and high salinity is particularly difficult, which is easy to cause scale and corrosion of equipment, especially silicon scale is difficult to treat, so the desalting link has become the key to wastewater recycling treatment. Although the traditional advanced treatment technologies such as advanced oxidation, coagulation and precipitation, adsorption and biochemical methods have some effects, they often face problems such as unsatisfactory effluent quality and low utilization rate of reuse water in practical applications.

In recent years, membrane separation technology has been widely used in the water treatment industry because of its excellent selectivity, wide applicability, low energy consumption and both separation and purification functions. Among them, reverse osmosis membrane technology has performed well in the in-depth treatment of coal chemical wastewater. Studies have confirmed that the double membrane process (that is, the combined application of reverse osmosis technology and other membrane technologies) can not only efficiently remove organic matter, greatly reduce COD, but also effectively inhibit the occurrence of membrane pollution, and has a significant removal effect on inorganic salts.

The Daltonen membrane brand's reverse osmosis membrane elements are optimized with a single package of high-pressure membrane technology, significantly increasing the durability of the membrane elements and extending their life by up to 50% compared to traditional anti-contamination membrane elements. In addition, by increasing the thickness of the film layer and improving the coating process, the problem of the fluctuation of the desalting rate caused by the uneven coating of the film elements is effectively solved, thus ensuring the stable operation and efficient processing capacity of the system.

With its excellent design and excellent performance, Daltonen membrane reverse osmosis membrane helps enterprises save investment costs and obtain higher benefits in a more economical way. The reverse osmosis membrane produced by OTM primary film forming technology has played a key role in many fields such as seawater desalination, industrial pure water preparation, electronic ultra-pure water treatment, water reuse, biopharmaceutical and food industry separation and concentration.

Reasonable selection and application of wastewater reuse technology to transform wastewater from coal chemical enterprises into valuable water resources will not only help alleviate the pressure of water shortage of enterprises, crack the bottleneck restricting their development, but also effectively promote the sustainable development of enterprises and the whole society. At present, in the face of increasingly severe environmental protection situation, the use of reverse osmosis membrane technology to further treat and reuse coal chemical wastewater has become an important trend of pollution control in coal chemical industry.

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