How to protect the automatic EDI ultrapure water treatment equipment when it is used-Ocpuritech-img

How to protect the automatic EDI ultrapure water treatment equipment when it is used?

by:Ocpuritech     2021-06-08
How to protect the automatic EDI ultrapure water treatment equipment when it is used? Author of the article: How EDI automatic protection ultrapure water treatment equipment reverse osmosis water purification equipment is the core of the filter element reverse osmosis membranes, reverse osmosis membranes if protection is not good, is bound to affect water purification effect?. New reverse osmosis membrane elements that have not been applied to fully automatic EDI ultrapure water treatment equipment should usually be soaked in 1% NaHSO3 and 18% glycerin aqueous solution and stored in a sealed plastic bag. If the plastic bag is not broken, it will not affect its life and performance even if it is stored for about 1 year. When the plastic bag is opened, it should be used as soon as possible to prevent the NaHSO3 from oxidizing in the air and adversely affecting the components. Therefore, the membrane should be opened before use as much as possible. And if the reverse osmosis membrane has been used in fully automatic EDI ultrapure water treatment equipment, we usually use two methods to protect it: 1. The trial machine runs for two days (15-24h), and then uses 2% formaldehyde solution for maintenance. 2. After running for 2-6 hours, use 1% NaHSO3 aqueous solution for maintenance (the air in the equipment pipeline should be exhausted to ensure that the equipment does not leak, and all inlet and outlet valves should be closed). The long-term shutdown and maintenance measures of the reverse osmosis membrane system are as follows: 1. Clean the membrane elements in the system. 2. Prepare the sterilizing liquid with the water produced by the reverse osmosis membrane, and flush the reverse osmosis membrane system with the sterilizing liquid. For the selection of bactericide and the preparation method of bactericidal liquid, please refer to the corresponding technical documents of the membrane company for technical advice. 3. After filling the reverse osmosis membrane system with sterilizing liquid, close the relevant valves to keep the sterilizing liquid in the system. At this time, confirm that the system is completely full. 4. If the system temperature is lower than 27°C, the first two steps should be performed with new sterilizing liquid every 30 days. If the system temperature is higher than 27°C, the protection liquid (sterilizing liquid) should be replaced every 15 days. 5. Before the reverse osmosis membrane system is put into use again, flush the system with low-pressure feed water for 1 hour, and then flush the system with high-pressure feed water for 5-10 minutes. Regardless of low-pressure flushing or high-pressure flushing, the system's product water discharge valve should all be opened. Before restoring the system to normal operation, check and confirm that the product water does not contain any fungicides. The aromatic polyamide reverse osmosis composite membrane element should not be in contact with water containing residual chlorine under any circumstances, otherwise it will cause irreparable damage to the reverse osmosis seawater desalination membrane element. When sterilizing, chemically cleaning or sealing the RO reverse osmosis seawater desalination system and pipelines, it should be absolutely ensured that the water used for the pharmaceutical solution does not contain any residual chlorine. If it is impossible to determine whether residual chlorine is present, a chemical determination should be performed. In the presence of residual chlorine, sodium bisulfite should be used to reduce the residual chlorine, and sufficient contact time should be maintained to ensure complete reduction. Through the above content, I believe that everyone has understood how to protect the reverse osmosis membrane of the automatic EDI ultrapure water treatment equipment. In order to ensure the stable performance of the membrane, once pollution occurs, it is necessary to follow the reverse osmosis membrane cleaning method of the automatic EDI ultrapure water treatment equipment It is cleaned.
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