The function of the filter element in the pure water machine and the outline of the installation design

The filter element determines the water quality of the water purifier. When purchasing a water purifier, pay attention to the efficiency of the filter element in filtering water. At present, most of the water purification processes use activated carbon filter, microporous ceramic filter, membrane separation and other methods. However, as the use time increases, the working capacity of the filter element decreases with the amount of water treated, and the filter element needs to be replaced in time. The purification principle of ceramic filter element is similar to that of activated carbon, but it has relatively good filtering effect and long service life, but it cannot completely remove bacteria. Membrane separation filtration type, mainly including microfiltration, ultrafiltration, fine filtration and reverse osmosis and other processes. 1. It can effectively prevent the activated carbon powder from entering the RO membrane, and protect the RO membrane to minimize the entry of activated carbon powder and prolong its service life. Because before installing the activated carbon filter element, no matter how clean it is, there will be carbon powder flowing out. Installing a 1μm filter element before the RO membrane can act as a barrier, greatly reducing the possibility of artificial pollution of the RO membrane. 2. The filtration accuracy of 1μm PP cotton is 1 μm, and harmful substances such as bacteria, sediment particles, and rust larger than 1 μm can be removed as much as possible. When the first 5μm filter element fails, it can still protect the RO membrane and reduce the RO membrane. probability of contamination. 3. If the third stage is block compressed activated carbon or sintered activated carbon CTO, three of the five stages of filtration are activated carbon, and the activated carbon filter element is reused, which not only wastes resources, but also increases costs. Losing its due effect is not worth the gain. The second stage is generally granular activated carbon, which needs to be washed during installation, which often causes a lot of black water, and it is easy to be washed out. If it is changed to compressed activated carbon black water, the problem will be solved, and the burden of the third-level PP cotton will not be increased. The first three-stage filtration of the water purifier is for the pretreatment of the reverse osmosis membrane. As the pretreatment of the raw water, it is to increase the service life of the reverse osmosis membrane, so the first filter element of the reverse osmosis membrane of the water purifier is still 1μmPP cotton is better.

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