Configuration requirements for filter elements in water purifiers

Now the standard water purifier is generally five-level configuration: 5μmPP cotton - granular activated carbon - 1μmPP cotton - RO membrane - post activated carbon. There are also some manufacturers whose third-level configuration is changed to block compressed activated carbon or sintered activated carbon CTO. Is the third-level filter element 1μmPP cotton or block compressed activated carbon more suitable? , The state required for life, that is, to make the water reach a certain degree of cleanliness. Removes solid particles from water, kills bacteria and filters out harmful chemicals. As we all know, the first three stages of filtration serve the RO membrane. As the pretreatment of raw water, it is designed to increase the service life of the RO membrane. Then the first filter element of the RO membrane of the water purifier is still 1μmPP cotton. The reasons are as follows: 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.
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