1, generally speaking, the structure of the first level of filtration water purifier is simple, mainly activated carbon, its filtration capacity is limited, can only be used as a coarse filtration, filtered water is best to be heated and boiled before drinking. A filtered water purifier most of the low-grade water purification products, each sold at a dozen dollars to 150 yuan.
2, multi-stage filtration water purifier. This water purifier has two levels of coarse filter and a set of fine filter, and fine filter more hollow fiber cartridge, filtered water can drink directly. Multi-stage filtration water purifier belongs to the mid-range water purification products, each priced at 300 yuan to 500 yuan, can be accepted by the working class, family use more.
3, ultrafiltration nanofiltration membrane water purifier, multi-stage pre-filtration and ultrafiltration membrane composition, can retain most of the bacteria, harmful substances, is currently the world's most ideal separation, filtration effect of drinking water purification device, while retaining beneficial minerals trace elements, and then use the advantages of KDF and activated carbon to effectively inhibit the breeding of bacteria, fungi in the water and to remove the foreign color, odor, ensure that the filtered water can be safer. Ensure that the filtered water can be safer and healthier to use. Moreover, the water production is large and the wastewater discharge is small, so it is faster and more convenient to use in the family kitchen without waiting for a longer time. Belonging to the mass consumer goods, according to different requirements of each unit priced from 1000 yuan to 5000 yuan.
4, reverse osmosis water purifier is to deal with rural water and groundwater water purification effect of the most ideal water purification products. It has a three-stage pre-filtration, a reverse osmosis membrane precision filtration and a post-filtration. Filtered water without bacteria, viruses, heavy metals, pesticides, organics, minerals and foreign colors and odors, is a kind of pure water, without heating to drink. This type of reverse osmosis water purifier belongs to the high-grade water purification products, each priced between 3,000 yuan and 5,000 yuan.
5, gold filter media water purifier: gold filter media from the deep seabed rocks extracted from the material, and attached to the surface of the trace elements needed by the human body zinc ions, is used in water purification equipment; when the gold filter media and harmful substances in the water reaction, decomposition of chlorine and compounds, while zinc ions will be released into the water, thus replenishing the human body's essential trace elements. 1, different regions have different water hardness, high hardness water in the north of China and the southern limestone areas, the water has a high content of calcium and magnesium ions, easy to scale, you should buy advanced filtration with ion exchange resin cartridge water purifier.
2, if the water chlorine, color and odor is heavy, more organic content of urban tap water, you can buy activated carbon loaded with more water purifiers. Because the activated carbon on the water residual chlorine, foreign colors and odors have a strong adsorption effect, the organic matter has a significant removal effect.
Commercial water purifier working principle
Most of the world's water bodies are seriously polluted, exacerbating the contradiction of water scarcity. Traditional tap water treatment methods, can not guarantee the provision of good quality drinking water, and in the municipal water supply there are also two pollution problems, such as high-level water tanks water supply, long pipelines for the delivery of tap water, can cause potential rust, scale and microbial contamination problems, therefore, a variety of brands of water purifiers came into being water purifier on the market according to the way of water quality treatment, can be divided into the following types:
1. Boiling method
The tap water is boiled for drinking, which is an ancient method and commonly used in China. Boiling water can kill bacteria, but some chemicals and heavy metals cannot be removed, even if their content is very low, so it is still unsafe to drink.
2. Mineralization method
is in the purification of the basis of the water and then added to the beneficial mineral elements (such as calcium, zinc, strontium and other elements) its purpose is to play the health effects of mineral water. Commercially available water purifiers generally through the addition of mafia stone in the water purifier to achieve the purpose of mineralization, but artificial mineralization effect is still a controversial issue.
3. The whole water
is a newly invented product in Japan, it is the water purification process, and then electrolysis activation, its alkaline activated water and the human body environment of the PH value corresponds to the human body has a health effect, suitable for drinking; acidic activated water can be used for face washing, bathing, beauty effects. However, the whole principle of the whole water, the whole water quality and the use of water on the human body, there are different views, need to be further explored.
4. Activated carbon adsorption (can be divided into the following three forms)
More commonly used, mostly with the essence, coal, shells (kernel) and other carbon-containing substances through the chemical method or physical activation system. It has a very large number of micropores and specific surface area, and thus has a strong adsorption capacity, can effectively adsorb organic pollutants in water. In addition, in the activation process, the surface of the activated carbon non-crystalline parts of the formation of a number of oxygen-containing functional groups, these groups make the activated carbon with chemical adsorption and catalytic oxidation, reduction properties, can effectively remove some metal ions in the water.
5. Reverse osmosis membrane method
Membrane separation technology, this method of pressure will be water through the synthetic membrane, the membrane only allows pure water to pass through, and pollutants are excluded. The use of R / O reverse osmosis technology, is the U.S. government and NASA to spend hundreds of millions of dollars, in order to solve the astronauts on the moon's drinking water problems, after years of hard work carefully developed high-tech results. Higher cost, suitable for poor water quality areas.
6. Microfiltration and over-filtration method
Microfiltration method is made of cellulose or polymer microporous membrane, the use of its uniform pore size to retain particles in the water, bacteria, colloids, etc., so that it does not pass through the membrane and be removed. This microporous membrane filtration technology, also known as particle density filtration technology, is capable of filtering micron- or nanometer-sized particles and bacteria. Over filtration and microfiltration are both membrane separation technology, there is no obvious boundary between the two, over filtration of the working pressure is generally about 0.3 MPa, can remove large molecules in water, bacteria, viruses, etc., but the flux is lower.
7. Composite
When a process is difficult to remove harmful substances in the water, the use of two or more than two kinds of technology is composite. Such as activated carbon adsorption, ultraviolet sterilization, activated carbon adsorption, reverse osmosis, activated carbon adsorption, microfiltration (more than filtration), polypropylene microfiber, live carbon, microfiltration (more than filtration) and so on. In the composite water purifier, membrane technology composite water purifier water purification performance is excellent, especially in the removal of microorganisms (bacteria, algae, etc.) has a relatively significant effect, some of which are good quality water purifier water can be directly drinking water, the majority of consumers are welcome to have become a hot spot of the current development of water purifiers.
From the classification of the above water purifier is not difficult to see, household water purifier is essentially a miniaturization of the depth of treatment of water, its main object of treatment is the tap water turbidity, color, odor and organic matter. It generally consists of pre-filtration (crude filtration), adsorption, fine filtration (microfiltration, more than filtration, reverse osmosis) and other three parts. Among them, adsorption (usually using activated carbon adsorption) and fine filtration is the main means of removing organic matter in water, foreign smell and chromaticity, the objective existence of the operation of the water purifier directly affects the quality of the effluent water. Household water purifier service object is thousands of households, but due to the use of regional water quality, water pressure conditions vary greatly, the user lacks the necessary operational knowledge, and product design can not cope with the ever-changing situation, so the manufacturer of water purifiers should be taken into account to allow the user to master a certain amount of professional knowledge, standardized installation and operation of water purifiers, so that the quality of water to achieve the desired results, so that the user can rest assured.
The design and manufacture of water purifiers is a comprehensive science and technology. The design principle of the water purifier should be for the sake of the user. In terms of the characteristics of water quality in various regions of China, along the Yangtze River and densely populated areas of serious organic pollution, while the country's small townships and townships throughout the country water supply enterprises and groundwater use areas with bacterial contamination. Therefore, only some of the good quality water purifiers can adapt to different water quality across the country, so water purifier manufacturers should be based on the water quality conditions in different regions, carefully designed to adapt to different water sources, but the treatment effect of good water purifiers.