【Seeking discussion】Can ultra-pure water equipment be used in the electronics industry? Do its water quality standards meet the requirements of this industry?
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The computers and smartphones we use in our daily lives all have a core component, which is the chip. However, everything gets dirty at some point. The cleaning requirements for chips are very high; ordinary tap water or standard purified water cannot be used for this purpose. Instead, ion impurities in the water must be removed through ion exchange technology, so as to obtain neutral ultra-pure water that contains no static electricity. http://www.laitelaide.com/uploads/allimg/130828/144Q924c-0.jpg Principle of operation of ultra-pure water treatment equipment 1. Water enters the EDI system; the main portion flows into the resin/membrane, while another portion flows along the outside of the membrane to remove the ions that pass through it. 2. Resins retain dissolved ions in water. 3. Under the action of the electrodes, the trapped ions move toward the positive electrode for anions, and toward the negative electrode for cations. 4. Cations pass through the cation membrane and are discharged outside the resin and the membrane. 5. Anions pass through the anion membrane and are discharged outside the resin and the membrane. 6. The concentrated ions are discharged from the wastewater flow path. 7. Deionized water flows out from the resin and membrane. http://www.ediwater.cn/d/file/chanpin/chaochunshui/2013-07-05/3d1960e7544c66a3e7d0b5705735daf6.jpg Features of ultra-pure water treatment equipment 1. All components are imported, offering advanced technology. 2. It features reliable quality, a high degree of integration, and is easy to expand – increasing the number of membranes allows for an increase in processing capacity. 3. It features a high degree of automation; it shuts down automatically in the event of a fault and has an automatic protection function. 4. The membrane module is made by rolling composite membranes, resulting in a higher solute separation efficiency and flux rate. 5. Low energy consumption, high water utilization rate, and low operating costs. 6. It has a reasonable structure and occupies little space. 7. An advanced membrane protection system that, when the equipment is turned off, allows the desalinated water to automatically wash away contaminants from the membrane surface, thereby extending its lifespan. 8. The system has no vulnerable components, requires little maintenance, and remains effective over a long period of time. 9. The equipment is designed with a scale prevention system for the membrane cleaning system. Article author: Lightlead Hefei Water Treatment Equipment
Pure water equipment in the electronics industry utilizes reverse osmosis technology, along with EDI technology. The requirements for water quality are very high, reaching up to **18.25 MΩ•cm of the standard value.
EDI is not crucial; ultra-pure water used in the electronics industry also needs to be graded, with chip wafers and TFT crystals generally requiring the highest purity. In addition to the standard megohm measurement, it is also necessary to test the particle size; the standard is that the proportion of particles smaller than 0.2 microns should be 100%. Therefore, in the electronics industry, two things need to be taken into account after the water has passed through the EDI system: 1. The water must be circulated, and resistometers should be installed at both the outlet and the return point, as even clean PVC pipes can result in significant losses in resistance – I’ve seen cases where the resistance dropped from 18 to 12 over a distance of 200 meters using Japanese Sysmex C-PVC pipes. 2. The water output must be filtered through a precision polishing bed with a 0.2-micron filter to ensure proper particle size control, and the storage tank must be kept under positive pressure using clean CDA gas or nitrogen