Reverse osmosis technology is increasingly widely used because of its special superiority. Reverse osmosis water purification equipment cleaning problems may make many users with weak technical force suffered losses, so to do a good job of reverse osmosis device management, you can avoid serious problems.
1. low-pressure flushing reverse osmosis device
Regular reverse osmosis device for high flow, low pressure, low pH flushing is conducive to stripping off the dirt attached to the membrane surface to maintain membrane performance, or when the reverse osmosis device feed water SDI suddenly rises more than 5.5 or more, it should be carried out in a low-pressure flushing, to be adjusted to a qualified value of the SDI and then start.
2. reverse osmosis device shutdown protection
Because of the fluctuation of production, reverse osmosis device is unavoidable to often shut down, short-term or long-term shutdown must take protective measures, inappropriate treatment will lead to a decline in the performance of the membrane and can not be restored.
Short-term preservation applies to the system out of service for less than 15d, can be used every 1 ~ 3d low pressure flushing method to protect the reverse osmosis device. Practice found that the water temperature above 20 ℃, the reverse osmosis device in the water stored for 3d will be odor and deterioration, a large number of bacterial reproduction. Therefore, it is recommended that the water temperature is higher than 20 ℃, every 2d or 1d low-pressure flushing, the water temperature is lower than 20 ℃, you can every 3d low-pressure flushing, each time after the flushing need to close the water purification equipment reverse osmosis device on all import and export valves.
Long-term out-of-service protection for more than 15d out-of-service system, which must be used to protect the liquid (biocide) filled with water purification equipment reverse osmosis device for protection. Commonly used biocide formula (composite membrane) for formaldehyde 10 (mass fraction), isothiazolinone 20mg / L, sodium bisulfite 1 (mass fraction).
3. Chemical cleaning of reverse osmosis membrane
In normal operating conditions, reverse osmosis membrane may also be inorganic scale, colloids, microorganisms, metal oxides and other contaminants, the deposition of these substances on the surface of the membrane will cause a decrease in the reverse osmosis unit of the water purification equipment, or a decrease in the rate of desalination, differential pressure, and even the membrane caused by irrecoverable damage, so in order to restore good water permeability and desalination performance, the need for chemical cleaning of the membrane. Therefore, in order to restore good water permeability and desalination performance, the membrane needs to be chemically cleaned.
Generally 3 ~ 12 months cleaning, if every month had to clean once, which indicates that the pretreatment system should be improved, adjust the operating parameters. If 1 to 3 months need to be cleaned once, it is necessary to improve the operation of the equipment, whether the need to improve the pretreatment system is more difficult to judge.