1, PP cotton screen plays the role of primary filtration, mainly intercepting impurities such as sediment and rust. The process of filtration is actually the process of interception, which cannot be washed away.
2. Activated carbon plays the role of adsorption. When the service life is up, in fact, the carbon is saturated and cannot be reused at this time.
Classification of filter element of water purifier:
1. Filter element of water purifier: activated carbon
Since the beginning of the twentieth century, activated carbon has been found to be used as a water treatment material. It is a kind of carbon with porous structure, and these pores are used to increase the surface area of activated carbon to absorb impurities. The physical properties of carbonized materials are closely related to their raw materials and treatment technology. At present, common carbon is mainly made of coal, trees, coconut shells or palms. Compared with other kinds of activated carbon, activated carbon fired from coconut shell has better stability, pore distribution and surface area, which makes it have better performance in water treatment.
2. Filter element of water purifier: PP cotton filter element
PP cotton filter element is mostly used to filter edema and suspended impurities. With micron as the grading standard, the common manufacturing methods of filter aperture with different densities inside and outside, such as 1, 5, 10, 20 micron, etc. , so that the filter element has greater pollution tolerance. When selecting PP primary pollution filter, different filter apertures must be selected according to the use situation. Origami filter is similar to PP decontamination filter. It uses folding design to increase its filtering surface area. The origami filter element is made of paper and plastic, which has the characteristics of repeated cleaning.
3. Filter element of water purifier: ultrafiltration membrane technology
Ultrafiltration membrane technology is a patented mixture, which contains extremely fine formula of activated carbon. It is spread on a large area of ultra-high density folded fiber layer by hydraulic pre-coating, and the adsorption area is about 80 football fields. At present, the most advanced ultrafiltration membrane technology is Franny UPVC technology, which is a model of full ultrafiltration filter element.
4. Filter element of water purifier: KDF alloy filter material
KDF is made of copper-zinc alloy, and its working mechanism is to remove heavy metals from edema through electrochemical reaction. KDF mainly treats heavy metal impurities and organic pollution sources in water. KDF is used at the front end of activated carbon, so that chlorine in water is removed by KDF before reaching the activated carbon. Therefore, activated carbon can more effectively remove other impurities remaining in water. Technically, it can effectively prolong the life of activated carbon to 15 times.
5. Filter elements of water purifier: Yishi, sandstone and Sha Ying.
Quartz sand is a traditional filter material. Mainly used in medium and large systems to remove suspended impurities in edema; After sand filtration is used as coagulant, many fine impurities in water can be filtered out. Because of the large capacity of quartz sand, the filter must be backwashed frequently, and the backwashing flow must be large in order to effectively clean and maintain water permeability.
6. Filter element of water purifier: RO reverse osmosis
RO membrane is the abbreviation of reverse osmosis membrane, which means reverse osmosis or reverse osmosis in Chinese. Infiltration is a physical phenomenon of water. Because the concentration of water is different, and the water permeates from low concentration to high concentration, reverse osmosis means that once water is pressurized, it will flow from high concentration to low concentration, which is the so-called reverse osmosis principle.