Cleaning of reverse osmosis equipment

by:NEWLINE     2021-06-04
Cleaning of reverse osmosis equipment 2018-03-27 13:45 Reverse osmosis technology is increasingly widely used due to its superiority. The cleaning problem of reverse osmosis beverage equipment may cause many users with weak technical strength to suffer losses. Therefore, it is necessary to clean and maintain the beverage equipment to avoid serious problems. 1. Low-pressure flushing reverse osmosis equipment Regular maintenance of reverse osmosis equipment, flushing with large flow, low pressure, and low pH is helpful to strip off the dirt attached to the membrane surface and maintain membrane performance, or when the reverse osmosis equipment enters SDI When the sudden increase exceeds 5.5, low-pressure flushing should be carried out, and the SDI value should be adjusted to a qualified value before the machine is turned on. 2. Outage maintenance of reverse osmosis equipment Due to production fluctuations, reverse osmosis equipment will inevitably be shut down frequently. All beverage equipment must be protected when they are out of service for a short or long period of time. Improper handling will result in membrane performance degradation and irreversibility. .   Short-term storage is suitable for systems that are out of service for less than 15 days. The method of low-pressure flushing every 1 to 3 days can be used to protect the reverse osmosis equipment. Practice has found that when the water temperature is above 20°C, the water in the reverse osmosis equipment will become smelly and deteriorate after 3 days, and a large number of bacteria will grow. Therefore, it is recommended that when the water temperature is higher than 20℃, low-pressure flushing once every 2d or 1d; when the water temperature is lower than 20℃, low-pressure flushing once every 3d is recommended. After each flushing, all inlet and outlet valves on the reverse osmosis device of the water purification equipment should be closed. . Long-term out-of-service protection is suitable for systems that have been out of service for more than 15 days. At this time, the reverse osmosis device of the pure water equipment must be filled with protective liquid for protection. 3. Chemical cleaning of reverse osmosis membrane Under normal operating conditions, the reverse osmosis membrane may also be contaminated by inorganic dirt, colloids, microorganisms, metal oxides, etc. The deposition of these substances on the membrane surface will cause the output of the reverse osmosis device of the water purification equipment to decrease Or the desalination rate drops, the pressure difference rises, or even irreversible damage to the membrane. Therefore, in order to restore good water permeability and salt removal performance, the membrane needs to be chemically cleaned.
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