Many customers consider the service life of ro membrane element before purchasing it. This is also one of the main reasons for distinguishing membrane performance. There is no problem in the service life within 3-5 years, but in the entire application process, in addition to all the normal attenuation coefficients of reverse osmosis element membrane, environmental pollution or unreasonable maintenance will also reduce the service life.
1. The key factors that endanger the service life of ro membrane element
(1). Physical changes: Due to the compaction effect, the permeability coefficient of the membrane decreases.
(2). Chemical reaction: the fluctuation of PH value harms.
(3). Pollution and blockage: Pollution and blockage of the membrane environment will also interfere with its service life. Under the normal operation of reverse osmosis membrane filter, the ro Membrane element will also be environmentally polluted by suspended solids or insoluble salts as the use time increases. If it is not cleaned immediately, the service life will be shortened, (4).so it is very important to clean on time.
(5). In order to better ensure the reasonable extension of the service life, we can ensure the best maintenance work and grasp the common problems in cleaning, so as to better maintain the performance of ro membrane element and ensure the actual effect of the water production.
2. How to extend the service life of ro membrane element
In order to better extend the service life, first of all, it is necessary to ensure that the performance of the membrane is not damaged, and it must be strictly operated during storage and application. Generally speaking, the new film must be soaked with 1% NaHSO3 and 18% glycerol solution, and then stored in a closed packaging bag. As long as the package is not damaged, there is no problem in storage for one year, but if the sealed package is damaged, it should be used as soon as possible to avoid negative impact on reverse osmosis element membrane.
After the commissioning of reverse osmosis membrane filter, the following methods should be adopted for maintenance: After commissioning and running for 15-24 hours, 2% formaldehyde solution should be used. After running for 2-6 hours, use 1% NaHSO3 solution for maintenance. The gas in the machine pipeline should be exhausted to ensure that the machine does not leak. Close all inlet and outlet valves.
According to the above content, if the maintenance work is done well, the service life of more than 5 years can be fully established.