What causes the reverse osmosis membrane of small and medium-sized industrial reverse osmosis water purification equipment to be unusable?
What causes the reverse osmosis membrane of small and medium-sized industrial reverse osmosis water purification equipment to be unusable? Author: reverse osmosis membrane is a reverse osmosis water treatment equipment for small and medium industries in the essential components, the use of reverse osmosis membrane has a lot of requirements, but many users are using small and medium industrial reverse osmosis water treatment equipment did not pay attention to these Requirements, make the reverse osmosis membrane have problems and cannot be used, so what are the factors that cause the reverse osmosis membrane of the small and medium-sized industrial reverse osmosis water purification treatment equipment to be unusable? The current ultrapure water devices all use pretreatment + reverse osmosis + EDI The process of this process, the water quality of this process is higher, reverse osmosis is composed of reverse osmosis membrane, reverse osmosis membrane has many requirements when treating water, among which temperature and operating pressure are two very important points, so ultra-pure What are the requirements for the temperature and operating pressure of the reverse osmosis membrane of the water installation? During the reverse osmosis process, the temperature of the material and liquid will increase with the progress of the operation. Within a certain range, the increase in temperature causes the viscosity of the material to decrease, which is conducive to the increase in the water production of reverse osmosis. Generally, when the temperature increases by 1℃, the water permeability of the membrane increases by about 2.7%. The water permeability of the membrane marked on the commercial membrane is generally the data value of the water temperature between 24 and 25 ℃, and the actual water permeability under the working condition temperature needs to be estimated by the correction coefficient. It should be noted that the operating temperature should not exceed the heat-resistant temperature of the film, otherwise the service life of the film will be affected. During the working process of the reverse osmosis membrane of the ultrapure water device, maintaining and increasing the operating pressure is beneficial to increase the water permeability, and because the membrane is compacted, the salt permeability will be reduced. However, when the operating pressure exceeds a certain limit, the membrane's water permeability will decline and the membrane will age due to serious membrane compaction and deformation. Therefore, the appropriate operating pressure should be selected according to the actual treatment liquid and the pressure resistance of the selected reverse osmosis membrane. This is the end of the introduction about the temperature and operating pressure requirements of the reverse osmosis membrane of the ultrapure water device. When operating the ultrapure water device, try to ensure that the use environment can meet the requirements of the reverse osmosis membrane to ensure the reverse osmosis membrane. The quality of the water produced by the infiltration equipment. 1. During the application of reverse osmosis membrane elements of small and medium-sized industrial reverse osmosis water purification treatment equipment, the limit back pressure is 5psi, and this limit value should not be exceeded under any circumstances, otherwise it will cause irreversible damage to the membrane elements. 2. Whether it is the influent water in the operation of the reverse osmosis water purification treatment equipment in small and medium-sized industries or the water used for flushing, its water quality must meet the requirements of reverse osmosis influent water quality, and at the same time, pay attention to the water flow rate must be low when flushing. For the maximum water flow rate of a single membrane element, reverse osmosis product water is the best choice for flushing water. 3. The parameters of the reverse osmosis water purification treatment equipment for small and medium-sized industries will be affected by the inlet water temperature to varying degrees. Therefore, it is recommended to install an online temperature measuring instrument for real-time online monitoring and recording. If the system is used to treat water sources with relatively high inlet water temperature, it is recommended to be equipped with a temperature alarm device. Once the temperature exceeds the design parameters, it can automatically alarm to prevent damage to the system. 4. The accurate calculation of the desalination rate is first to perform chemical analysis on the influent and product water. It can be calculated after measuring the TDS content, but sometimes this calculation is relatively troublesome, so the conductivity will be converted to TDS. , So as to calculate the salt rejection rate. This is the introduction of the factors that cause the reverse osmosis membrane of the small and medium-sized industrial reverse osmosis water purification treatment equipment to be unusable. I hope it will be helpful to everyone. I also want to know more about the small and medium-sized industrial reverse osmosis water purification equipment. For the relevant content, please continue to pay attention to our website.
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