How to identify the quality of the membrane in the purified water equipment? Can be divided into "three steps"

　　Pharmaceutical Network Technical Article: Purified water equipment is mainly used for a variety of ultrapure materials, reagents, laboratories, biological experiments, electronic products, production and cleaning In recent years, with the advancement of environmental protection concept, more and more industries, including the pharmaceutical industry, pay high attention to water quality, the application of purified water equipment gradually broaden, the filtration effect of purified water equipment is more stringent
According to the principle of purified water equipment, simply put, the source water into pure water, the source water into the pure water machine equipment at all levels of purification system, filter out the water quality of impurities, organic matter, inorganic, meaning gas and other insolubles, the source water through all levels of filter elements After entering the membrane of pure water equipment, reverse osmosis membrane can remove all kinds of residues from the water, only let the water molecules through the membrane hole into the rear stage treatment, in the ion exchange technology, so that the ions in the water through the role of positive and negative electrodes, to achieve the ion water standards that people need
In purified water equipment, reverse osmosis membrane is the core component, which can effectively remove colloidal, microorganism, dissolved salt and other impurities in water
It is worth mentioning that the reverse osmosis membrane as a special separation film material, with low investment costs, low energy consumption, high separation efficiency, advanced technology, wide application and other advantages, initially used in the aerospace industry, and then gradually extended to civil, industrial, the current reverse osmosis membrane in medicine, food, beverage, desalination and other fields have been widely used
It is understood that the quality of reverse osmosis membrane in purified water equipment will affect the effect of filtration, so the choice of membrane is very critical So, how should the user recognize the quality of the membrane in the purified water equipment? What issues do I need to be aware of when purchasing reverse osmosis membranes? There is purified water equipment manufacturers technical staff suggested that can be divided into "three steps."
One look Users should look at the film to see if the film is complete, whether it is fresh "Because of some external factors, the purified water reverse osmosis membrane may be incomplete "The technician says so
two smells It is understood that if by production and external factors, the membrane may deteriorate, some will emit a strange smell, if the long-term storage is not appropriate, will also make purified water reverse osmosis membrane adverse effects Therefore, the user can hear the method to further judge the quality and bad membrane
Three tests The test is also one of the most effective methods for identifying purified water reverse osmosis membranes It is reported that through the good quality of reverse osmosis membrane out of the water, one no impurities, two no salt, three no minerals
"The higher the reverse osmosis membrane with high desalination rate and water flux, the better." A higher desalination rate means that the ultra-thin desalinated layer on the membrane surface is denser Technicians say users can focus on desalinating rates and water flux
In addition, reverse osmosis is a pressure-driven membrane separation technology, so flexibility and mechanical strength have high requirements, good reverse osmosis membrane generally has strong heat and pressure resistance, the user can test this
If it is applied in a special environment, the user also needs to test the performance of the membrane against physical, chemical, microbial erosion, to see if it has good oxidation resistance and hydrolysis resistance
In general, users in the selection of reverse osmosis membrane need to be judged, comprehensive consideration of all aspects, in general, well-chosen material, exquisite technology, quality effect will be better, long service life.