The filter element of the water purifier is different according to the use of the filtered water
1、 Activated carbon filter element
There are two types of activated carbon filter elements: compressed activated carbon filter element and bulk activated carbon filter element.
1. The compressed activated carbon filter element uses coal activated carbon and coconut shell activated carbon with high adsorption value as the filter material, and is sintered and compressed with food-grade adhesive. The compressed activated carbon filter element is wrapped with a layer of non-woven fabric with filtering effect inside and outside, to ensure that the carbon core itself will not drop carbon powder. The carbon core is equipped with soft nitrile rubber sealing gasket at both ends, so that the carbon core has a good sealing performance when loaded into the filter cartridge.
2. The bulk type activated carbon filter element will put the required activated carbon particles into the special plastic shell, and use the welding equipment to weld the end cover on the two ends of the shell. The two ends of the shell will be placed with non-woven filter pieces for filtration respectively, to ensure that the carbon core will not drop carbon powder and black water during use. According to the needs of customers, the shell end cover can be made into different types of connection ports. Interface modes include: flat pressure type and pipeline type.
2、 PP filter element
PP filter element is also called PP melt-blown filter element. The melt-blown filter element is made of polypropylene superfine fiber, which is made of hot-melt entanglement. The fiber randomly forms a three-dimensional microporous structure in space. The pore size of the micropore is distributed in gradient along the flow direction of the filtrate. It integrates surface, deep layer and fine filtration, and can intercept impurities with different particle sizes. Precision range of filter element: 0.5-100 μ m. Its flux is more than 1.5 times that of the filter element of the same precision peak room. It can be configured with different types of end cap connectors to meet the needs of various engineering installation.
3、 Ceramic filter element
The ceramic filter element is a new type of environmental protection filter element, which is prepared by using diatomite mud as raw material and special technology molding method. Its average aperture is only 0.1 μ m. It is the filter element with the highest filtration accuracy at present.
The purpose of the ceramic filter element is to remove the solid particles in the solution, plating solution and tap water, while the carbon filter element is to remove the organic impurities in the solution. During filtration, the solution is pushed by the pump and flows through the filter cartridge and filter element. The particles are separated from the filter element, and the filtered solution returns to the electroplating tank or solution tank through the core tube. Admittedly, the filter paper can also filter particles, but its function is different from that of the filter element. The filter paper separates particles by the surface, while the filter residue of the filter element is hidden in the yarn, and its surface area is much larger than that of the filter paper.
4、 Resin filter element
Resin is a porous and insoluble exchange material. The resin filter element in the water softener contains millions of tiny resin balls (beads), all of which contain many negative charge exchange positions that absorb positive ions. When the resin is in a new state? These charge exchange sites are occupied by positively charged sodium ions. When calcium and magnesium pass through the resin storage tank, they contact with the resin beads and replace sodium ions from the exchange position. The resin preferentially combines cations with strong charge, and the charge of calcium and magnesium ions is stronger than that of sodium ions. Replace the sodium cation and then flow down through the resin "bed and out of the water softener, so that the water softener sends out" soft "water. Finally, all resin exchange positions are occupied by calcium and magnesium, and can no longer work.
5、 Titanium rod filter element
The titanium rod filter element has excellent performance such as corrosion resistance, high temperature resistance, high strength, easy to ensure the filtering accuracy and easy to regenerate; The titanium filter element is formed from titanium powder and sintered at high temperature, so the surface particles are not easy to fall off; The operating temperature in the air can reach 500~600 ℃; It is applicable to the filtration of various corrosive media, such as hydrochloric acid, sulfuric acid, hydroxide, sea water, aqua regia, iron, copper, sodium and other chloride solutions. It has excellent mechanical properties, can be cut, welded and other machining, high compressive strength, internal pressure damage strength up to more than 2MPa; Its filtering accuracy is easy to ensure, and even under high temperature and high pressure, the aperture will not deform. Its porosity can reach 35~45%, its pore size distribution is uniform, its contaminant capacity is large, and its regeneration method is simple, and it can be reused after regeneration.
6、 KDF filter material
KDF is a high-purity copper alloy, which can perfectly remove heavy metals and acid ions in water, improve the activation degree of water, and is more conducive to human absorption of water, protect human health, and promote human metabolism. KDF filter element is made of this material. This filter element is the best configuration for the water purifier. This filter material is used in several models of Aishang oxygen water purifier.
7、 Nanofiltration membrane
Nanofiltration membrane is a functional semi-permeable membrane that allows the penetration of solvent molecules or some low molecular weight solutes or low valent ions. It is a special and promising type of separation membrane. It is named for its ability to intercept substances of about nanometer size. Its molecular weight of intercepting organic substances is about 150-500, and its ability to intercept soluble salts is between 2-98%. The desalination of monovalent anionic salt solution is lower than that of high-valent anionic salt solution. It is used to remove the organic matter and chroma of surface water, remove the hardness of groundwater, partially remove soluble salts, concentrate juice and separate useful substances in drugs.
8、 Hollow fiber ultrafiltration membrane
Hollow fiber ultrafiltration membrane is one kind of ultrafiltration membrane. It is the most mature and advanced ultrafiltration technology. The outer diameter of hollow fiber is 0.5-2.0mm, and the inner diameter is 0.3-1.4mm. The wall of hollow fiber is filled with micropores. The pore size is expressed by the molecular weight of the material that can be intercepted, and the intercepted molecular weight can reach several thousand to several hundred thousand. The raw water flows under pressure outside the hollow fiber or inside the cavity, forming an external pressure type and an internal pressure type respectively. Ultrafiltration is a dynamic filtration process. The intercepted substances can be removed with the concentration, without blocking the membrane surface, and can be operated continuously for a long time. Ultrafiltration membrane is one of the earliest developed polymer separation membranes.
9、 RO reverse osmosis membrane
RO reverse osmosis membrane, RO is the abbreviation of ReverseOsmosis membrane in English, which means reverse osmosis (RO) in Chinese. Generally, the flow mode of water is from low concentration to high concentration. Once the water is pressurized, it will flow from high concentration to low concentration. That is the so-called reverse osmosis principle: because the pore diameter of RO membrane is five millionths (0.0001 microns) of the hair, it is generally invisible to the naked eye, and bacteria and viruses are 5000 times of it. Therefore, Only water molecules and some beneficial mineral ions can pass through, and other impurities and heavy metals are discharged from the waste water pipe. This method is used in all seawater desalination processes and in the recovery and treatment of astronauts' wastewater. Therefore, RO membrane is also called high-tech artificial kidney in vitro.