The process summary of each filter element used in the pure water machine water process

With the continuous improvement of people's living standards, more and more attention is paid to the health of drinking water. The water that people often drink is basically hard water. Such water contains a lot of calcium and magnesium ions. Although hard water does not directly cause harm to the human body, it will cause various discomforts to the body over time and bring a lot of inconvenience to life. The pure water device is mainly to filter out most of the impurities in the water quality, so that the water quality meets the national drinking water standards, so as to ensure the safety and health of the family's drinking water. The core water production process in the water purification device uses filter elements. There are various types of filter elements and different process uses. The following will introduce the process principles of each filter element. 1. Activated carbon filter The types of activated carbon filter for water purification machines mainly include compressed activated carbon filter and bulk activated carbon filter. The compressed activated carbon filter element adopts coal-based activated carbon and coconut shell activated carbon with high adsorption performance as the filter material, and is sintered and compressed with food-grade binder. Both the inside and outside of the compressed activated carbon filter element are wrapped with a layer of non-woven fabric with filtering function to ensure that the filter element itself will not drop carbon powder, and the two ends of the filter element are equipped with soft nitrile rubber gaskets, so that the filter element can be loaded into the filter cartridge with good performance. tightness. Bulk type activated carbon filter packs the required activated carbon particles into a special plastic shell, and welds the end caps on both ends of the shell with welding equipment. , to ensure that the carbon core does not drop carbon powder and black water during use. 2. PP cotton filter PP filter can also become PP melt-blown filter, which is mainly made of polypropylene ultrafine fibers by thermal fusion entanglement. The fibers randomly form a three-dimensional microporous structure in space, and the pore size is distributed in a gradient along the flow direction of the filtrate. Deep and refined filtration in one, can retain impurities of different particle sizes. The filter element accuracy range is about 0.5 to 100 μm, and different types of end cap joints can be configured to meet the needs of various engineering installations. 3. Resin filter element Resin preferentially binds cations with strong charges, and the charge of calcium and magnesium ions is stronger than that of sodium ions. The displacing sodium cations then pass down the resin bed and out of the water softener, so that the softener sends out soft water. Finally, all resin exchange sites are occupied by calcium and magnesium ions, and no work can be performed, requiring backwashing to regenerate the resin. 4. Ceramic filter element Ceramic filter element is a new type of environmental protection filter element, which is made of diatomite mud as raw material and prepared by a special process. Its average pore size is only about 0.1 μm, which is the filter element with high filtration precision at present.

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