Reverse osmosis technology has been increasingly widely applied due to its unique superiority. The cleaning issue of reverse osmosis water purification equipment may cause losses to many users with weak technical capabilities. Therefore, by doing a good job in the management of reverse osmosis equipment, serious problems can be avoided.

Low-pressure flushing of reverse osmosis equipment

Regularly perform high flow, low pressure and low pressure on the reverse osmosis equipmentpHThe flushing of the value is conducive to removing the dirt adhering to the membrane surface, maintaining the membrane performance, or when the reverse osmosis equipment feeds waterSDISuddenly increase over5.5At the above times, low-pressure flushing should be carried out and waitSDITurn on the machine only after the value adjustment is qualified.

Reverse osmosis equipment shutdown protection

Due to fluctuations in production, reverse osmosis equipment is inevitably shut down frequently. When it is out of service for a short or long time, protective measures should be taken. Improper handling can lead to a decline in membrane performance that cannot be restored.

Short-term storage is applicable when the service is out of service15dThe following systems can adopt each1～3dThe method of low-pressure flushing is used to protect reverse osmosis equipment. Practice has found that water temperature20℃At the above times, water is stored in the reverse osmosis equipment3dIt will go bad and stink, and multiply in large numbers. Therefore, it is recommended that the water temperature be higher than20℃Every hour, every2dor1dLow-pressure flushing once, with water temperature lower than20℃At that time, you can do it every time3dPerform a low-pressure flush once. After each flush, all the inlet and outlet valves on the reverse osmosis device of the water purification equipment should be closed.

Long-term shutdown protection applies to shutdown15dFor the above-mentioned systems, at this time, protective liquid (agent) is filled into the reverse osmosis device of the water purification equipment for protection. The commonly used agent formula (composite film) is formaldehyde10(Mass fraction) isothiazolinone20mg/LSodium bisulfite1(Mass fraction).

Chemical cleaning of reverse osmosis membranes

Under normal operating conditions, reverse osmosis membranes may also be contaminated by inorganic scale, colloids, microorganisms, metal oxides, etc. The deposition of these substances on the membrane surface can cause a decrease in the output or desalination rate of the reverse osmosis device in the water purification equipment, an increase in pressure difference, and even cause irreparable damage to the membrane. Therefore, in order to restore good water permeability and desalination performance, chemical cleaning of the membrane is required.

"General3～12It should be cleaned once a month. If it has to be cleaned once a month, it indicates that the pretreatment system should be in place and the operating parameters should be adjusted. If1～3If the equipment needs to be cleaned once a month, it is necessary to improve its operational level. It is rather difficult to determine whether the pretreatment system needs to be improved.