Nowadays, with the deterioration of the quality of drinking water for residents, more and more residents choose to use water purifier products. Although many residents use water purifier products, they do not understand the filter elements of water purifiers and water purifiers. Filter types and functional characteristics of each level, so the filter replacement cycle will be different. Today, Xiaobian will introduce the types and functional characteristics of the water purifier filter, so that consumers can better use the maintenance water purifier products.
Water purifier filter type
1. Polypropylene melt blown filter (PP cotton)
It is commonly used for one-pole filtration of various household water purification equipment, pre-treating tap water, filtering out sediment, suspended solids, colloids, organic matter and impurities in water.
2, activated carbon filter
Activated carbon has a strong adsorption on many substances, mainly used to remove the color and odor of the water, residual chlorine, and can change the taste of water.
Granular filter element: The basic composition is granular activated carbon filled in a specific scaffold. The composition is simple, the cost is low, but the carbon is easily damaged, the service life and the effect are unstable, and it is commonly used for the two-pole filtration of various household water purification equipment.
Compressed activated carbon filter: Stronger than granular activated carbon. It also has a longer service life and is commonly used for three-pole filtration of various household water purification equipment.
Post-bacterial activated carbon filter: a small amount of silver ions are loaded on the activated carbon, often used as the last-stage filter to further remove the impurities that have not been removed or newly introduced in the first few steps, while killing and suppressing the regeneration of bacteria in the water to prevent purification. The secondary pollution of water makes drinking water safer.
3, ceramic filter
The ceramic filter element is made by forming diatomaceous earth and sintering at a high temperature. The purification principle is similar to that of activated carbon, but the filter effect is good and the service life is long. The 0.1 micron pore size can effectively filter out microorganisms such as sediment, rust iron, some bacteria and parasites in the water. The filter element is easy to regenerate, and can often be washed with a brush and sanded.
4, ultrafiltration filter (UF)
Made of polypropylene hollow fiber, the membrane is in the shape of a hollow capillary. The membrane wall is densely packed with micropores with a pore diameter of 0.1--0.3 Î¼m. It can filter all bacteria and trap tiny sediments, colloids, particles, bacteria, etc. in water. Macromolecular substances, filtered water can be eaten raw. Can be used repeatedly for recycling.
5, reverse osmosis membrane (RO)
Currently the most advanced: RO reverse osmosis. The reverse osmosis membrane is made of cellulose acetate or aromatic polyamide, and has a pore diameter of 0.0001 Î¼m. The high-pressure water pump pressurizes the tap water so that the water molecules permeate from the higher membrane concentration to the lower concentration side, and the inorganic ions And bacteria, fungi, virions, etc. can not pass, with the discharge of wastewater, thereby removing harmful substances such as bacteria, viruses, heavy metals, pesticides, etc. in water, to achieve the purpose of direct drinking
Because the reverse osmosis membrane has a small pore size, it is easily blocked by impurities and loses its function. In order to prolong the service life of the RO membrane, pretreatment of pp cotton, activated carbon and the like is required, and the reverse osmosis filter is generally used in the fourth stage.
6, other filter
Ion exchange resin filter: It can be divided into cationic resin and anionic resin. It can ion exchange with cations such as calcium and magnesium in water and sulfate and other anions to achieve hard water softening and deionization, but it can not filter bacteria and viruses. And other impurities.
Heavy metal filter element: such as KDF filter element, it is a high-purity copper and zinc alloy filter material, which can effectively remove heavy metal ions, and chemical pollutants such as chlorine and organic substances; inhibit the growth of bacteria in water and prevent secondary pollution of water bodies. At the same time, it increases the zinc content of minerals beneficial to the human body.
Filter replacement: Since the water quality has a great influence on the service life of the filter element, in general, the filter element should be considered if the following conditions occur:
1. The effluent water quality is poor, the taste is decreased, and the pure water TDS value rises;
2, the discharge flow is significantly reduced, check whether the filter or membrane is blocked (but should be confirmed not caused by the water temperature drop);
3. The outer surface of the filter element is covered by sludge impurities, or the filter element is seriously discolored;
4. If the filter element is severely blocked, the water purification equipment cannot make water or the pure water cannot flow out.
Only the full performance of each filter can ensure the clean water and normal water flux. If you pay attention to the regular replacement of the filter, you can ensure the clean water quality forever.
Filter reference replacement cycle:
1. Polypropylene melt blown filter (PP cotton): 3 to 6 months
2, activated carbon filter: 6 months
3, ceramic filter: six months to one year
4, ultrafiltration filter (UF): three years
5. Reverse osmosis membrane (RO): three years
6, ion exchange resin filter: half a year
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