Selection criteria for filter elements in water purifiers

Compared with bottled water, the pure water produced by the pure water machine is fresher, more hygienic and safer. It can be used in a wide range of applications. It can be drunk raw or boiled. The outstanding feature in this regard is that the kettle or electric thermos is no longer used. It will be scaled; convenient pure water is used for cooking, which is more hygienic and more delicious; bathing with pure water can remove impurities on the skin, moisturize the skin, and have a natural beauty effect; it can be provided to humidifiers, steam irons, The water required for small appliances such as beauty instruments will never appear annoying white powder; when used in conjunction with the ice maker, the ice cubes made are crystal clear and free of any peculiar smell. Now the standard water purifier configuration is generally five levels: 5μmPP cotton - granular activated carbon - 1μmPP cotton - RO membrane - rear activated carbon. There are also some manufacturers whose third-stage configuration is changed to block compressed activated carbon or sintered activated carbon CTO. Is the third-stage filter element suitable for 1μmPP cotton or block compressed activated carbon? As we all know, the first three-stage filtration is for RO membrane service. , As the pretreatment of raw water, it is designed to increase the service life of the RO membrane, so the previous filter element of the RO membrane of the water purifier is still 1μmPP cotton is better. There are three reasons: 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-grade PP cotton will not be increased. The raw water is filtered by three pre-treatment filters. The first-stage 5-micron PPF filter element removes water, suspended solids larger than 5 microns and other substances. The second-stage granular activated carbon adsorbs organic substances such as odor, chlorine and chlorine by-products in raw water. The third stage 1 micron PPF removes suspended solids and other substances larger than 1 micron in water. The water after the third-stage pretreatment is pressurized into the fourth-stage reverse osmosis membrane by a high-pressure pump. Since the pore size of the reverse osmosis membrane is only 0.0001 microns, a single bacteria should be reduced by 4,000 times, and infectious viruses should be reduced by more than 200 times. Therefore, all the fine and impure impurities, soluble solids, bacteria and viruses in the water cannot penetrate the high-precision reverse osmosis membrane. The reverse osmosis membrane separates the water from other impurities and pollutants, the harmful substances are automatically discharged from the concentrated water outlet, and the pure water enters the pressure tank for standby. When using the water, open the gooseneck faucet and the pure water will automatically flow out through the fifth-stage post-bacteriostatic activated carbon and it is safe to drink.
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