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Cars are the product of modern technological advancements, and the automotive industry can contribute to the development of the national economy. Ultra-pure water equipment is one of the essential tools for vehicle painting; by using an automatic pre-treatment system combined with two-stage reverse osmosis and EDI technology, the quality of cars can be effectively ensured. Functions of the various components in the ultra-pure water equipment used for automotive surface coating 1. The EDI system in such equipment: The EDI system, also known as continuous electro-deionization technology, utilizes the selective permeability of anion and cation membranes to these ions, along with the ion-exchange capacity of resin to remove ions from water. Under the influence of an electric field, ions in the water are directed to move, thereby achieving thorough purification and desalination of the water. Additionally, hydrogen ions and hydroxide ions generated through water electrolysis are used to continuously regenerate the resin. 2. Functions of the membrane filter: to remove bacteria killed by ultraviolet light as well as other particles. 3. Ultraviolet sterilizer: Function – kills bacteria in water using ultraviolet light to ensure water quality. Design advantages of ultra-pure water equipment for automotive surface coating 1. The pretreatment system is equipped with a raw water tank to prevent disruptions to the equipment caused by unstable pressure and flow rates of tap water. 2. The raw water tank is equipped with an electric inlet valve and a bypass valve, offering more stable performance than conventional float-type inlet valves, and it does not cause water hammer in the municipal water supply network. 3. For normal operation of the equipment, Southern Water Pumps are used in a one-main-one-redundant configuration to ensure stable performance. The two-stage reverse osmosis high-pressure pumps are from Danfoss, Denmark, and the frequency converters are also from Danfoss; thus, system startup does not cause any fluctuations in the power grid. 4. Equipped with a dedicated high-flow backwash pump, which ensures a more thorough backwashing effect; it also has the functions of watering plants, cleaning floors, and flushing toilets. 5. It uses imported Hydranautics low-pressure reverse osmosis membranes, which feature a high desalination efficiency, long service life, stable operation, and low energy consumption. 6. Maximize the recycling of reverse osmosis concentrate and EDI concentrate to save energy and reduce emissions. 7. It adopts an automatic pretreatment system combined with two-stage reverse osmosis and EDI; the control circuit uses a safe 24V voltage, and an on-site control cabinet is provided to facilitate maintenance and operation, ensuring the safe and stable operation of the system to the greatest extent possible. 8. The use of plate heat exchangers ensures that cold weather in winter does not affect water quality or quantity, nor will it cause the RO membrane elements to crack. Laitlead Nanchang Water Treatment Equipment Company [www.nanchangshui.com] 9. Reverse osmosis systems are scientifically configured through membrane design software and on-site operation experience. 10. Equipped with a dedicated concentrated water control valve, offering simple and convenient operation. 11. Utilize specialized technical skills to ensure stable water quality during short-term or long-term shutdowns of the EDI system. 12. Equipped with a 0.22um membrane filter to prevent particles from affecting the EDI system and water quality. 13. Equipped with a chemical cleaning system that features pure water flushing for the RO membrane, thereby extending its service life. I hope we can learn from each other, discuss together, and make progress as a group.