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What are the more common problems with electrodialyzer equipment?

release time:2019-11-06 11:21:51

What are the more common problems with electrodialyzer equipment?
Today's society's reverse osmosis technology is a very advanced and energy-saving desalination technology for water equipment. When it comes to this reverse osmosis technology, we have to mention reverse osmosis equipment, which can achieve the effect of this technology. more obvious. However, these devices may have some problems during long-term use.
Our manufacturers have summarized through many years of production experience that the more common problems of reverse osmosis equipment can be divided into three categories, namely chemical scaling, biological fouling and suspended solids and colloidal fouling.
First, the chemical scaling problem
There will be a large amount of salt in the raw water of the reverse osmosis equipment. After the raw water in the reverse osmosis equipment passes through the reverse osmosis system, the concentrated water has been concentrated 4 times according to the 75% recovery rate of the reverse osmosis system. Since the ion concentration in the raw water is increased, only the ion saturation is too high to generate scale. In the second stage, there is an excess of dissolved salt precipitated in the concentrated water to cause fouling, and chemical fouling occurs.
Second, the problem of biological fouling
We all know that natural water contains a lot of microorganisms, especially in the surface of the earth. When the raw water entering the reverse osmosis equipment system is natural water, a large amount of microorganisms are brought into the reverse osmosis system as natural water enters. In addition, the water temperature of the water present in the reverse osmosis system is usually 20 to 40 ° C, which is very advantageous for the growth of microorganisms. Adding an appropriate amount of fungicide is one of the methods to effectively control the growth of microorganisms. Therefore, in order to effectively protect the membrane module of the reverse osmosis apparatus and the system can operate smoothly, it is very necessary to periodically sterilize the sterilizing agent during the normal operation and shutdown of the reverse osmosis equipment system.
Third, suspended solids, colloidal fouling
The water in the nature we live in contains all kinds of impurities, mainly including suspended matter, dissolved matter and colloidal matter. When we use a reverse osmosis membrane to separate water and solutes, if the suspended matter and colloidal substances in the reverse osmosis raw water are deposited on the surface of the membrane, the reverse osmosis membrane will be contaminated, and the water production of the reverse osmosis equipment will be reduced. At the same time, the salt rejection rate will also decrease.
In order to prevent this from happening, we can effectively remove the suspended matter and colloid contained in the raw water from the reverse osmosis equipment by adding the flocculant to the reverse osmosis raw water and utilizing the adsorption and net trapping functions of the flocculant. Substance, so that the quality of the raw water after pretreatment can meet the water ingress requirements of the reverse osmosis membrane, and it can effectively avoid the accumulation of suspended solids and colloidal substances in the raw water on the membrane surface. .
Through the three common problems mentioned above, we can sum up some common-sense skills. For example, in order to ensure the long-term stable and efficient operation of the reverse osmosis equipment system, we must find ways to improve the efficiency of water use, so we need Chemical agents are placed in the reverse osmosis system, and the raw water is appropriately treated by the added chemicals to reduce fouling and fouling of the reverse osmosis membrane.
Shengzhou Lijia Water Treatment Equipment Co., Ltd. is a professional reverse osmosis equipment, electrodialysis equipment and electrodialysis equipment enterprise. It designs electrodialysis equipment according to the principle of electrodialysis, and is applied in the design, research and development and manufacture of water treatment, membrane separation and filtration. Processing and engineering contracting installation and commissioning in one of the high-tech enterprises.