What are the misunderstandings in the cleaning of small and medium-sized reverse osmosis ultrapure water treatment equipment modules when they become fouled?
What are the misunderstandings in the cleaning of small and medium-sized reverse osmosis ultrapure water treatment equipment modules when they become fouled? Author: SME ultrapure water reverse osmosis equipment during long-term use, are some of the contaminants in the water pollution, such as colloidal, scale, and other metal oxides, these contaminants will be deposited on the surface of the reverse osmosis membrane If it is not treated in time, it will reduce the water treatment capacity and cause the pollution of the reverse osmosis membrane. In addition, it will also put pressure on the reverse osmosis membrane and cause damage to the reverse osmosis membrane. Therefore, in order to ensure the normal operation of small and medium-sized reverse osmosis ultrapure water treatment equipment, it is necessary to regularly clean and maintain the scale of the edi module of the small and medium-sized reverse osmosis ultrapure water treatment equipment. First of all, after the small and medium-sized reverse osmosis ultrapure water treatment equipment stops operating for a period of time, the reverse osmosis membrane must be cleaned when it is used again. However, most of the current reverse osmosis equipment is fully automatic and will automatically clean. The main function of cleaning the reverse osmosis membrane is to remove the impurities deposited on the reverse osmosis membrane and avoid damage to the reverse osmosis membrane. Perform a chemical cleaning of the long-term reverse osmosis membrane. Because of the long-term use, the accumulation on the reverse osmosis membrane will continue to increase. Although ordinary washing can clean it away, it is not thorough, so it is best to regularly perform the reverse osmosis The membrane is chemically cleaned, so as to restore better permeability and desalination, and improve the water filtration effect. 1. During EDI operation, if poor water supply is introduced into the components, or the power supply is insufficient, the maintenance workload will increase. 2. The main causes of scaling in the feed water are TOC, hardness and iron. 3. The high hardness of the feed water will cause scaling on the ion exchange concentrated water side, which will reduce the pure water quality. At the same time, water hardness, dissolved CO2 and high PH will accelerate scaling. The dirt can be cleaned with a suitable acid solution. 4. Organic matter pollution in the feed water will form a thin film on the surface of the ion exchange resin and ion exchange membrane, which will seriously affect the ion migration rate, thereby affecting the pure water quality. When this happens, the pure water chamber needs proper cleaning. 5. If the EDI components are operated without electricity or insufficient electricity, the ions in the exchange bed will be saturated with ions, and the purity of the pure water will be reduced. In order to regenerate the ion exchange resin, it is necessary to pass water through the components and slowly increase the power supply voltage to make the adsorbed ions migrate out of the system. When the resin is regenerated, the components will pass more current than normal operation. Warning: If the power supply has no overcurrent protection, be careful not to exceed the power supply capacity of the power supply. 6. The electrode connector should be checked regularly to prevent corrosion or slack caused by the surrounding conditions, so as not to increase the resistance, hinder the flow of current, and cause the pure water quality to drop. 7. If the outside of the membrane needs to be cleaned, please pay attention to the following points: Do not use acetone or other solvents. Disable water cleaning when the power is on. When scrubbing, use a damp cloth, which can be soaked in a small amount of detergent. So, you know why it is necessary to regularly clean and maintain small and medium-sized reverse osmosis ultrapure water treatment equipment. In fact, it is not only small and medium-sized reverse osmosis ultrapure water treatment equipment, any water treatment equipment must be properly cleaned and maintained during long-term use to maintain the stable operation of the equipment.
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