How to clean pure water equipment?
Reverse osmosis technology has been increasingly used due to its superiority. The cleaning problem of reverse osmosis water purification equipment may cause losses to many users with weak technical strength, so it is necessary to do a good job of cleaning and maintaining reverse osmosis equipment to avoid serious problems. China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bio-pharmacies.com
1. Low pressure flushing reverse osmosis equipment
Regular maintenance of reverse osmosis equipment, high flow, low pressure, low pH flushing 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 . , should be low-pressure flushing, and then turn on the SDI value after it is qualified.
2. Reverse osmosis equipment outage maintenance
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 that have been shut down for less than 15 days , and reverse osmosis equipment can be protected by low-pressure flushing every 1 to 3 days . 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 that the water temperature should be flushed 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 every 3d at low pressure. After each flushing, 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) and isothiazolinone 20 mg/L .
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.
Generally , it should be 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.