Reverse osmosis technology has been increasingly used due to its special advantages. The cleaning problem of reverse osmosis water purification equipment may cause losses to many users with weak technical strength. Therefore, to manage the reverse osmosis equipment, serious problems can be avoided. Pvb Film-Automotive,Pvb Interlayer Glass,Pvb Film Glass,Sgp Glass Interlayer HUAKAI FENGSHI TECHNOLOGY (CHONGQING) CO., LTD. , https://www.cqhkpvb.com
Cleaning method for reverse osmosis equipment
Reverse osmosis technology has been increasingly used due to its special advantages. The cleaning problem of reverse osmosis water purification equipment may cause losses to many users with weak technical strength. Therefore, to manage the reverse osmosis equipment, serious problems can be avoided.
1. Low pressure flushing reverse osmosis equipment
Regular high-flow, low-pressure, low-pH flushing of reverse osmosis equipment is beneficial to remove dirt adhering to the surface of the membrane, maintain membrane performance, or when the SDI of the reverse osmosis equipment suddenly rises above 5.5, Perform low pressure flushing and turn the machine on after the SDI value is adjusted.
2. Reverse osmosis equipment shutdown protection
Due to fluctuations in production, reverse osmosis equipment is inevitably shut down frequently. Protective measures must be taken when decommissioning in the short or long term. Unsuitable handling will result in a decrease in membrane performance and unrecoverable.
Short-term storage is suitable for systems with a shutdown of 15d or less. The reverse osmosis equipment can be protected by a low-pressure flushing method every 1~3d. It has been found that when the water temperature is above 20 °C, the water in the reverse osmosis equipment will be stinky after being stored for 3 days, and a large amount of bacteria will multiply. Therefore, it is recommended to flush the water every 2d or 1d when the water temperature is higher than 20°C. When the water temperature is lower than 20°C, it can be washed once every 3d. After each flush, all the inlet and outlet valves on the reverse osmosis unit of the water purification equipment should be closed. .
Long-term deactivation protection is applicable to systems that have been out of service for more than 15 days. In this case, the protective liquid (biocide) must be filled with the reverse osmosis unit of the water purification equipment for protection. The commonly used fungicide formulation (composite film) is formaldehyde 10 (mass fraction), isothiazolinone 20 mg/L, and sodium hydrogen sulfite 1 (mass fraction).
3. Reverse osmosis membrane chemical cleaning
Under normal operating conditions, reverse osmosis membranes may also be contaminated by inorganic scales, colloids, microorganisms, metal oxides, etc. These substances may deposit on the surface of the membrane, causing a decrease in the output of the reverse osmosis unit of the water purification equipment or a decrease in the salt rejection rate. It raises and even causes irreparable damage to the membrane. Therefore, in order to restore good water permeability and desalination performance, the membrane needs to be chemically cleaned.
It is usually cleaned once every 3 to 12 months. If it has to be cleaned once a month, this indicates that the pretreatment system should be improved and the operating parameters adjusted. If it needs to be cleaned once in 1 to 3 months, it is necessary to improve the operation level of the equipment. It is difficult to judge whether it is necessary to improve the pretreatment system.
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn