Reverse osmosisediThe device is composed of reverse osmosis technology andEDIThe industrial high-purity water equipment, which is formed by the combination of technologies, has excellent working efficiency and water quality. During the application of this equipment, if the operation is improper, the performance of its main component, the reverse osmosis membrane, may be damaged. Therefore, to avoid such problems, the following points should be particularly noted.

　　1There is residual gas in the permeation equipment operating under high pressure,The formation of an air hammer will damage the film

　　There are often two situations occurring:

　　AAfter the equipment is emptied,When re-running,The gas was rapidly pressurized before it was completely discharged. Should be2～4barAfter the remaining air is completely expelled under the pressure,Then gradually increase the voltage for operation.

　　BWhen the joint between the pretreatment equipment and the high-pressure pump is not well sealed or leaks water(Especially the leakage of the microfilter and the pipeline behind it)When the pre-treated water supply is insufficient,If the microfilter gets clogged,In poorly sealed areas, some air may be drawn in due to vacuum. The microfilter should be cleaned or replaced,Ensure that the pipeline does not leak. In conclusion,The flowmeter should be gradually pressurized and operated when there are no bubbles in it,If bubbles are found during operation, the pressure should be gradually reduced to check the cause.

　　2The method of shutting down the osmotic equipment is incorrect

　　AWhen shutting down, the voltage was rapidly reduced without thorough flushing. Because the concentration of inorganic salts on the concentrated water side of the membrane is higher than that of the raw water,It is prone to scaling and contaminating the membrane.BRinse with pre-treated water containing chemical reagents. Water containing chemical reagents may cause membrane fouling during the equipment's shutdown period.

　　When the reverse osmosis equipment is about to be shut down,The addition of chemical reagents should be stopped,Gradually reduce the blood pressure3barRinse both sides with pre-treated water10min,Directly concentrated waterTDSWith the original waterTDSStop when it's very close.

　　3Microbial contamination is caused by poor maintenance of the penetration equipment

　　This is a common problem in the use of composite polyamide membranes,Because polyamide membranes have poor resistance to residual chlorine,Chlorine and other agents were not added correctly during use,In addition, users do not pay enough attention to the prevention of microorganisms,It is prone to cause microbial contamination. At present, many manufacturers produce pure water with excessive microorganisms,It was caused by poor maintenance.

　　The main manifestations are:

　　When leaving the factory,ROThe equipment was not maintained with liquid;After the equipment was installed, the entire pipeline and pretreatment equipment were not inspected;Intermittent operation without taking maintenance measures;The pretreatment equipment and reverse osmosis equipment were not regularly inspected;The maintenance fluid has expired or its concentration is insufficient.

　　Reasonable operation of ultrapure water equipment is an important condition for ensuring its long-term stable operation. Therefore, when applying industrial ultrapure water equipment, users should fully understand the issues that need attention during the operation of the equipment.