Activated carbon water filters are the most common. They are mostly made of carbonaceous materials such as coal and fruit shells (cores) through chemical or physical activation methods. They have very large pores and specific surface area, so they have a strong adsorption capacity and can be effective. To adsorb organic pollutants in water.
In addition, during the physical activation process, some oxygen-containing functional groups will be formed on the non-crystalline parts of the surface of the activated carbon. These groups can make the activated carbon have the properties of chemical adsorption, catalytic oxidation and reduction, and can effectively remove some metal ions in water.
2. Reverse Osmosis Water Filter
The reverse osmosis water filter uses a special separation technology that uses pressure to pass water through a synthetic membrane, and this membrane will exclude contaminants and only allow pure water to pass, which has a higher cost and water purification effect. Better, suitable for areas with poor water quality.
3. Compound Water Filter
Compound water filters are usually made with two or more technologies. In the composite water filter, the membrane technology composite water purifier has excellent water purification performance, and has a relatively significant effect on the removal of microorganisms (bacteria, algae, etc.) in the water, and can be consumed raw after the water is discharged.
Filtering Level
1. The first level is the filter element, also known as PP cotton filter element (PPF);
2. The second-stage granular activated carbon (UDF) filter element;
3. The third level is the precision compressed activated carbon (CTO) filter element;
4. The fourth stage is reverse osmosis membrane or ultrafiltration membrane;
At present, there are four mainstream technologies for water filters on the market, microfiltration technology, ultrafiltration technology, nanofiltration technology, reverse osmosis technology.
1. Microfiltration technology mainly uses microporous filter membrane as the medium, and the filtration accuracy of the water filter is 0.1 microns. It can only effectively remove suspended solids such as sludge and clay in the water, and cannot filter out macromolecular organic matter and inorganic salts. Because of its low filtration accuracy and short life, it also requires frequent replacement of the filter element, so it is not widely used.
2. Ultrafiltration technology uses pressure as the driving force to filter out pollutants with ultrafiltration membranes. The filtration accuracy of the water filter is 0.01 microns, so it can filter out most pollutants, including colloids, suspended solids, and macromolecules. Organic matter will also retain minerals. In view of its long service life, the filtered water can be directly consumed, and most manufacturers on the market combine it with other filter materials to play an important role in kitchen water use.
3. Nanofiltration technology, the filter pore size is 0.001 microns, the filtration accuracy of the water filter is between ultrafiltration and reverse osmosis, it needs to be powered and pressurized, and the price is higher, but it is in the price of the water purifier and the principle of the water purifier The upper is inferior to the ultrafiltration water purifier and reverse osmosis water purifier, so it is used less.
4. Reverse osmosis technology, which uses the principle of reverse flow of water from low concentration to high concentration, and its filter pore size is only 0.0001 microns, so it can effectively filter out 99% of the pollutants in the water, even inorganic salts can also filter out a part. It also needs to be pressurized and powered, but its wastewater rate is relatively high, which is not suitable for a large amount of water purification.
1. PP water filter cartridge Pre-treat the tap water to filter out the sediment, suspended solids, colloids, impurities, etc. in the water, the filter area is large and the dirt holding capacity is large, the filtering effect is good, the service life is long, and it can be cleaned and used repeatedly.
2. UDF water filter cartridge Absorb odor, sunk color, residual chlorine, halogenated hydrocarbons and organic substances in water, which are harmful to human body. KDF can remove more than 90% of residual chlorine, greatly extending the life of activated carbon. 3. CTO water filter cartridge Absorb deep-water odors, halogenated hydrocarbons and organic substances and other harmful substances, effectively improve the taste of the water. The long-life compressed activated carbon and high dirt-retaining mesh structure make the filter element have dual-function filtration performance. 4. RO reverse osmosis membrane The pore size of the reverse osmosis membrane is only 0.0001 micrometers, a bacterium must be reduced by four thousand times, and the source of infectious diseases must be reduced by more than 200 times to pass, so all fine and impure impurities \ soluble solids \ bacteria \ and viruses in the water cannot penetrate too high Precision reverse osmosis membrane: Separates water from other impurities and contaminants, harmful substances are automatically discharged from concentrated water, and pure water enters the pressure tank for standby.
5. Post activated carbon water filter cartridge It further removes odors, residual chlorine and bacteriostasis, prevents secondary pollution of purified water, and makes drinking water healthier and safer. Activated carbon filtration, according to the adsorption characteristics of activated carbon, activated carbon is mainly used to remove contaminants in water, decolorization, filtration and purification of liquids, gases, but also for air purification, waste gas recovery (such as the recovery of gas benzene in the chemical industry) 1. Recovery and refining of precious metals (such as the absorption of gold). Activated carbon is mainly made of substances with high carbon content, such as wood, coal, husks, bones, petroleum residues, etc. The coconut shell is the most commonly used raw material. Under the same conditions, the active quality and other characteristics of coconut shell activity are the best, because it has the largest specific surface. Activated carbon is a kind of multi-pore carbonized material with extremely rich pore structure and good adsorption characteristics. Its adsorption effect is formed by physical and chemical attraction, and its appearance is black. In addition to the main carbon, its composition also contains a small amount of hydrogen, nitrogen, and oxygen. Its structure looks like a hexagon. Due to the irregular hexagonal structure, it is determined that it has a large amount of surface and high surface area. Features, each gram of activated carbon has a specific surface equivalent to as much as 1,000 square meters.
At present, there are many types of water filters on the market, and there are various types of water filter cartridges. Consumers know very little about the role of water filter cartridges.
The water filter depends on the internal water filter cartridges to remove impurities and contaminants in the water. It is the core component of the water filter. Currently, the water filter cartridge mainly includes PP cotton water filter cartridge, activated carbon water filter cartridge , ultrafiltration membrane water filter cartridge or reverse osmosis membrane water filter cartridge.
PP cotton water filter cartridge: The primary filter cartridge of the water filter mainly intercepts and filters suspended substances, sediment, red worm, rust, colloid and other substances that are insoluble in water. As the water filter cartridge at the front end can protect the filter element at the back. Due to the front-end filtering, the filter element wears out faster. It usually needs to be replaced in about 3 months.
Activated carbon water filter cartridge: Activated carbon generally uses coal-based carbon or plant carbon (coconut shells, fruit shells) as raw materials. After carbonization and activation treatment, a developed pore structure is generated inside, which has a powerful filtering and adsorption effect. In water purification products, activated carbon is mainly used to remove odors and odors in water and remove residual chlorine. At the same time, it has some functions of filtering heavy metal ions, but it is relatively weak. Due to the wide variety of impurities contained in tap water, in theory, activated carbon can adsorb some of the inorganic and organic substances, including some colloids. But in this case, the activated carbon will quickly fail, so it is often not used as a primary filter element, but PP cotton water filter cartridge is added in front.
Ultrafiltration membrane water filter cartridge: Ultrafiltration membrane is a mechanical sieve filter membrane, its accuracy is generally 0.01 microns. At this level, most impurities can be filtered out, and some heavy metal ions and minerals in water cannot be filtered. Therefore, generally speaking, the water filtered by the ultrafiltration membrane water filter cartridge cannot be drunk directly. However, in the southern region with better water quality, the water filtered by the ultrafiltration membrane has reached the requirement of direct drinking.
Reverse osmosis membrane water filter cartridge: Reverse osmosis membrane is the mainstream product of water purification equipment filter on the market. Under the action of a certain pressure, the reverse osmosis membrane can pass water molecules and other impurities will be trapped. Therefore, the water filtered by the reverse osmosis membrane water filter cartridge is basically pure water, so people often use reverse osmosis water purification equipment. Called the straight drink machine.
If the water filter wants to achieve better water purification, the water filter cartridge is indispensable. At present, the types of water filter cartridges that can be used in water purifiers are very rich. The filter elements of different materials have different purification effects on water during use, and the service life of water filter elements is limited. Replace the water filter element in time. Do you know how often to replace the water filter element?
Water filter cartridge type There are many types of water filter cartridges. Different types of filter elements have different purification effects when purifying water sources. Here we first look at the types of water filter cartridges. Activated carbon water filter cartridge: There are two types of activated carbon filter cartridget, one is compressed activated carbon water filter element, and the other is granular activated carbon water filter cartridge. Compressed activated carbon filter core mainly uses high adsorption value coal activated carbon as the filter material, and then sintered and compressed with food-grade binder. This kind of activated carbon filter core is wrapped with non-woven fabric with filtering effect inside and outside to ensure that the carbon core will not fall down. At the same time, there are sealing pads at both ends of the carbon core, so that the carbon core has a good quality after being inserted into the filter cartridge ‘S tightness. PP water filter element: PP filter cartridge is mainly made of polypropylene ultrafine absorption pattern hot melt entanglement. Its filter accuracy range is 0.5-100μm. It can be equipped with different types of end cap connectors to meet various engineering installations. A need. Ceramic water filter cartridge: The ceramic element mainly uses diatomite mud as the raw material, and is made by a special method. It is the most accurate filter element now. Ceramic water filter cartridges have a wide range of uses, and they are used in many brands of water purifier products. RO reverse osmosis membrane filter cartridge: RO reverse osmosis membrane has a pore size of one millionth of the hair membrane. When purifying water, only water molecules and some mineral ions are beneficial to the human body. Can pass, and other impurities will be discharged. In the water filter element, RO reverse osmosis membrane is widely used, and its purification effect is also the best one among various filter elements.
Under normal circumstances, the replacement cycle of different water filter cartridges is different when they are used. For example, the ultrafiltration membrane water filter cartridge has a service life of 3 years. When the filter element is replaced, the filter element can be replaced based on this time. Due to the difference in water quality in various regions, when using a water purifier to filter the water quality, the length of time the filter cartridge is used will also change to a certain extent. When we use the water purifier, if we find that its production When the amount of water becomes smaller and the taste of the water after purification becomes worse, then this means that your water purifier filter element needs to be replaced.
How often does the water filter cartridge change Different types of water filter cartridges have different replacement cycles because of the different materials used. Hollow fiber ultrafiltration membrane: 3 years or more Granular fine-washed coconut shell activated carbon filter cartridge: half a year to 1 year Block sintered activated carbon filter: half a year to 1 year KDF filter: 2-3 years Ceramic filter: half a year to 1 year Anion energy ball filter: half a year to 1 year Rear activated carbon filter: about 1 year Far infrared mineralized ball filter: about 1 year
According to the needs of water filter, there are many types of water filter cartridges, and each type of water filter cartridge has slightly different functions. There are four common types of activated carbon filter cartridge, PP cotton filter cartridge, ultrafiltration membrane filter cartridge, and KDF filter cartridge. Tourmaline Water Filter Cartridge There is no water purification effect, and it has the effect of anti-radiation. At the same time, the tourmaline material is relatively expensive, so it is generally claimed that the tourmaline contains tourmaline is mostly false hype.
Activated Carbon Water Filter Cartridge The main function is adsorption, different carbon adsorption is different, generally speaking, the larger the surface area of carbon particles, the stronger the adsorption, the higher the filtration accuracy, the better the filtration effect, and the carbon needs special treatment under high pressure to achieve better Of activity. Mineralized Ball Water Filter Cartridge The mineralization ball is used to mineralize the water quality, increase the minerals in the water, and the effluent water quality can reach alkaline, but after a period of time, the alkaline effect will basically disappear. Therefore, the general promotion of the effect of alkaline water machine can only start for a few weeks, and alkaline water has no effect on the human body, because any water will become acidic after passing through the gastric juice. Activation Ball Water Filter Cartridge The activation ball is also a kind of publicity. In fact, it is to increase the minerals in the water in the early stage. The effect is the same as that of the mineralized ball. KDF Water Filter Cartridge This is a copper-zinc alloy used to remove heavy metals in water, while having bacteriostatic and bactericidal effects. Softening Water Filter Cartridge It is mainly sodium salt, which can remove scale through resin exchange. The effect is obvious, but there is a drawback that the sodium salt in the water exceeds the standard, and the excessive sodium salt causes adverse factors to the human body. Water Filter Cartridge of Removal Chlorine Generally, calcium sulfite, or frosting is used to remove residual chlorine in water quality. There are many auxiliary filter elements for water purifiers, but many auxiliary filter elements are just the hype of the concept, which has a very poor effect on the water purifier, the effect is very poor, and even has side effects, so it is difficult to achieve the desired effect.
Replacement of Water Filter Cartridge Under normal circumstances (when municipal tap water is used as raw water), the service life of the ultrafiltration membrane water filter cartridge is more than 3 years. The ultrafiltration water filter cartridge can be replaced based on this time. Due to the difference in water quality in different regions, if users find that the water production of the water filter gradually decreases during the process of using the water purifier, after repeated backwashing, the water production cannot still meet the usage requirements, and the taste of the water production is also obvious In the case of deterioration, it is necessary to replace the ultrafiltration membrane water filter cartridge at this time.
1. Nanofiltration Water Filter Cartridge Membrane Nanofiltration water filter cartridge membrane is a functional semi-permeable membrane that allows the penetration of solvent molecules or certain 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 trap substances of about nanometers. Its molecular weight for trapping organic substances is about 150-500. The ability to trap soluble salts is 2- Between 98%, the desalination of the monovalent anion salt solution is lower than that of the high-valent anion salt solution. It is used to remove organic matter and color of surface water, remove the hardness of groundwater, partially remove soluble salts, concentrate fruit juice, and separate useful substances in medicines. 2. Empty Fiber Ultrafiltration Water Filter Cartridge Membrane Hollow fiber ultrafiltration membrane is a kind of ultrafiltration water filter cartridge membrane. It is a mature and advanced technology in ultrafiltration technology. Hollow fiber outer diameter: 0.5-2.0mm, inner diameter: 0.3-1.4mm, the hollow fiber tube wall is covered with micropores, the pore size is expressed by the molecular weight of the substance that can be trapped, and the molecular weight cutoff can reach thousands to hundreds of thousands. Raw water pressurized flow outside the hollow fiber or the inner cavity, respectively constitute the external pressure type and internal pressure type. Ultrafiltration is a dynamic filtration process. The trapped substances can be removed with concentration, without blocking the membrane surface, and can be continuously operated for a long time. Ultrafiltration water filter cartridge membrane is one of the early developed polymer separation membranes. 3. RO Reverse Osmosis Water Filter Cartridge Membrane
RO reverse osmosis water filter cartridge membrane, RO is the abbreviation of English Reverse Osmosis water filter cartridge membrane, Chinese meaning is: reverse osmosis (reverse osmosis), the general water flow is from low concentration to high concentration, once the water is pressurized, it will flow from high concentration to low concentration , The so-called reverse osmosis principle: Because the pore size of the RO water filter cartridge membrane is 5 parts per million (0.0001 micrometers) of the hair strand, it is generally invisible to the naked eye, and bacteria and viruses are 5000 times larger than it. Therefore, only water molecules and parts The mineral ions beneficial to the human body can pass through. Other impurities and heavy metals are discharged from the waste water pipe. All seawater desalination processes and astronaut waste water recovery and treatment adopt this method. Therefore, RO membranes are also called high-tech artificial kidneys in vitro.
a. Compressed activated carbon water filter cartridge adopts coal activated carbon and coconut shell activated carbon with high adsorption value of the filter type of the first grade water purifier as filter material, and is sintered and compressed by food-grade binder. The compressed activated carbon filter core is wrapped with a layer of non-woven fabric with filtering function inside and outside, to ensure that the carbon core itself does not drop carbon powder, and the two ends of the carbon core are equipped with soft nitrile rubber sealing pads, so that the carbon core is loaded into the filter cartridge Has good sealing.
b. Bulk-type activated carbon water filter cartridge is packed with special activated carbon particles in a special plastic shell, and the end caps are welded to the two ends of the shell with welding equipment. The two ends of the shell are put into non-woven fabrics for filtering. Filters to ensure that the carbon core does 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. The interface methods are: flat pressure type and pipeline type.
2. PP Water Filter Cartridge
The PP filter element is also called PP melt-blown water filter cartridge. The melt-blown filter element is made of polypropylene ultrafine fibers hot-melted and entangled. The fibers randomly form a three-dimensional microporous structure in space. , Fine and fine filtration in one body, can trap impurities of different particle sizes. The accuracy range of the water filter cartridge is 0.5-100μm, and its flux is more than 1.5 times that of the peak filter of the same accuracy. It can be configured with different types of end cap connectors to meet the needs of various engineering installations.
3. Ceramic Water Filter Cartridge
The ceramic water filter cartridge is a new type of environmental protection filter element, which is prepared by using diatomite mud as a raw material and a special technical molding method. Its average pore size is only 0.1μm, which is the water filter cartridge with high filtration accuracy.
The purpose of the ceramic filter core is to remove the chemical particles in the water, the plating solution, and the solid particles in the tap water. The carbon water filter cartridge removes the organic impurities in the liquid. When filtering, the solution is pushed by the pump and flows through the filter cartridge and the filter element. The particles are separated in 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 out particles, but the role is different from the water filter cartridge, the filter paper is to remove particles by the surface, and the filter residue of the filter element is hidden between the yarns, and its surface area is much larger than the filter paper.
4. Resin Water Filter Cartridge
Resin is a porous, insoluble exchange material. Thousands of fine resin balls (beads) are installed in the resin water filter cartridge of the water softener. All small balls contain many negative charge exchange sites that absorb positive ions. When the resin is in a nascent state? These charge exchange sites are occupied by positively charged sodium ions. As calcium and magnesium pass through the resin storage tank, they come into contact with the resin beads to replace sodium ions from the exchange site. The resin preferentially binds cations with a stronger charge, and calcium and magnesium ions have a stronger charge than sodium ions. Substitute the sodium cation and then go down through the resin “bed and out of the water softener, so that the water softener sends out” soft “water. After that, all the resin exchange positions are occupied by calcium and magnesium, and can no longer work.
It is commonly used as a water softener filter element, which can pass through a resin regeneration agent (soft water salt) after filtration. Commonly used time regeneration and flow regeneration;
5. Titanium Rod Water Filter Cartridge
Titanium rod filter has corrosion resistance, high temperature resistance, high strength, easy to ensure filtration accuracy, easy regeneration and other excellent properties; titanium filter is formed by titanium powder formed and sintered at high temperature, so the surface particles are not easy to fall off; use temperature in air It can reach 500 ～ 600 ℃; suitable for the filtration of various corrosive media, such as: hydrochloric acid, sulfuric acid, hydroxide, seawater, aqua regia and iron, copper, sodium and other chloride solutions.
Increasing the activation level of water is more conducive to the absorption of water by the human body, protects human health, and promotes human metabolism. It is this material that makes the KDF filter.
The pore size of the ultrafiltration membrane is between 1 and 20 nanometers, and it cannot filter heavy metal ions and organic matter.
The pore size of the nanofiltration membrane r is smaller, which can filter most impurities, but the filtering effect of soluble ions such as calcium and magnesium is not good. RO reverse osmosis home water filter, the pore size of the filter membrane is 0.1 nm, even small particles such as metal ions such as harmful impurities can still be filtered to obtain pure water that can be directly consumed.
What is the speed of filtering water?
The water output rate of the RO system is related to the RO membrane. There are 50 gallons, 75 gallons, 100 gallons, and 500 gallons. Generally speaking, ro home water filter has a bucket, and there will be filtered pure water in the bucket. If you want to get pure water quickly, you can buy a ro home water filter with 500 or more gallons of ro membrane.
Which home water filter to choose?
If you want direct drinking water, it is recommended that you buy ro home water filter. The ro system is currently the most advanced home water filter, and the filtered water can be directly consumed. In other home water filters, the filtered water is not directly drinkable.
Purified water refers to its pure water quality, which does not contain any impurities and is composed of a simple substance of H2O. It effectively prevents various types of germs from invading the human body. Its advantage is that it can effectively and safely replenish water to the human body. It has strong solubility, so it has strong affinity with human cells and promotes metabolism.
Generally, in the production process of pure water, only 50% -75% of the source water is used, that is to say, 1 kg of tap water or groundwater can only produce about 0.4 kg of purified water, and the remaining 0.6 kg Water cannot be used as drinking water, it can only be used for other purposes. RO System Technology The reverse osmosis technology is reverse osmosis membrane, also known as RO membrane, which has the highest filtration accuracy, up to about 0.0001 microns (10 times finer than nanofiltration). Under a certain pressure (so a booster pump is required), only water molecules can pass through the reverse osmosis membrane, and inorganic salts, heavy metal ions, organics, colloids, bacteria, viruses and other impurities in the raw water cannot pass through the reverse osmosis membrane, so The water filtered by the reverse osmosis membrane is very pure, which is theoretically “purified water”!
Why RO System Produce Wastewater? What Causes These Wastewaters? A: There are two main sources of wastewater: washing wastewater and filtering wastewater. Flushing waste water is used to flush the RO membrane, which is usually flushed when the machine restarts to make water, so as to avoid the RO membrane from being blocked and prolong the service life of the RO membrane. Filtration wastewater is some retentate produced by tap water after being filtered by RO membrane.
sun yunda 