How to choose a commercial water purifier

1. Generally speaking, the primary filtration water purifier is simple in structure, mainly made of activated carbon, and its filtration capacity is limited, so it can only be used for coarse filtration. It is best to heat and boil the filtered water before drinking. Most of the water purifiers with primary filtration belong to low-grade water purification products, and the price of each one is between ten yuan and 15 yuan.

2. multistage filtration water purifier. This water purifier has two stages of coarse filtration and a group of fine filtration, and the fine filtration mostly adopts hollow fiber filter element, so the filtered water can be directly drunk. Multi-stage filtration water purifier is a mid-range water purification product, and its price is between 3 yuan and 5 yuan, which can be accepted by the working class and is widely used by families.

3. Ultrafiltration nanofiltration membrane water purifier, which consists of multistage pre-filtration and ultrafiltration membrane, can intercept most bacteria and harmful substances, and is the most ideal direct drinking water purification device in the world at present, while retaining mineral trace elements beneficial to human body. Then, the advantages of KDF and activated carbon are used to effectively inhibit the growth of bacteria and fungi in water and remove abnormal colors and odors, so as to ensure the safer and healthier use of filtered water. Moreover, the water yield is relatively large, and the wastewater discharge is small, so that it is faster and more convenient to use in the family kitchen without waiting for a long time. It belongs to popular consumer goods, and the price of each set varies from 5, yuan in 1 yuan according to different requirements.

4. reverse osmosis pure water machine is the most ideal water purification product for treating rural water and groundwater. It has three-stage pre-filtration, one-stage reverse osmosis membrane precision filtration and one-stage post-filtration. The filtered water contains no bacteria, viruses, heavy metals, pesticides, organic matter, minerals and strange colors. It is pure water and can be drunk without heating. This kind of reverse osmosis pure water machine belongs to high-grade water purification products, and the price of each set is between 3, yuan and 5, yuan.

5. Gold filter media water purifier: the substance extracted by gold filter media from deep seabed rocks, and zinc ions, a trace element needed by human body, are attached to its surface and used in water purification equipment; When the gold filter reacts with harmful substances in water, it decomposes chlorine and compounds, and at the same time, zinc ions will be released into water, thus supplementing trace elements necessary for human body. 1. The hardness of water in different regions is different. In the high-hardness water in northern China and limestone areas in southern China, the content of calcium and magnesium ions is high and it is easy to scale. Therefore, you should choose an advanced filtration water purifier with ion exchange resin filter.

2. If the water contains chlorine, abnormal color and odor, and contains more organic matter, you can choose a water purifier with more activated carbon. Because activated carbon has a strong adsorption effect on residual chlorine and abnormal odor in water, it has obvious removal effect on organic matter.

working principle of commercial water purifier

most water bodies in the world are seriously polluted, which aggravates the contradiction of water shortage. Traditional tap water treatment methods can no longer guarantee to provide high-quality drinking water, and there are still two pollution problems in municipal water supply, such as high-rise water tank supply and long tap water pipeline, which will all cause potential pollution problems such as rust, scale and microorganisms. Therefore, various brands of water purifiers have emerged. According to the water quality treatment methods, water purifiers on the market can be divided into the following types:

1. Boiling method

refers to drinking tap water after boiling. Boiling water can kill bacteria, but it can't remove some chemicals and heavy metals, even if its content is extremely low, so it is still unsafe to drink.

2. Mineralization method

refers to adding mineral elements (such as calcium, zinc, strontium and other elements) that are beneficial to human body to water on the basis of purification, with the purpose of exerting the health care function of mineral water. Commercially available water purifiers generally achieve the purpose of mineralization by adding medical stone to the water purifier, but the artificial mineralization effect is still a controversial issue.

3. The water purifier

is a product newly invented in Japan. It purifies the water first, and then carries out electrolytic activation. Its alkaline activated water corresponds to the PH value of the human body's internal environment, which is healthy for human body and suitable for drinking. Acidic activated water can be used for washing face and bathing, and has a beauty effect. However, there are different views on the principle, water quality and the influence on human body after use of the water purifier, which need further discussion.

4. Activated carbon adsorption (which can be divided into the following three forms)

It is commonly used, and it is made of carbonaceous substances such as essence, coal quality and fruit shell (core) by chemical method or physical activation method. It has a lot of micropores and specific surface area, so it has strong adsorption capacity and can effectively adsorb organic pollutants in water. In addition, during the activation process, some oxygen-containing functional groups are formed on the amorphous part of the surface of activated carbon, which make activated carbon have chemical adsorption, catalytic oxidation and reduction properties, and can effectively remove some metal ions from water.

5. reverse osmosis membrane method

a kind of membrane separation technology, which uses pressure to pass water through a synthetic membrane, and only pure water is allowed to pass through the membrane, while pollutants are excluded. The R/O reverse osmosis technology adopted is a high-tech achievement that the US government and NASA have spent hundreds of millions of dollars to solve the problem of drinking water for astronauts on the moon after years of hard work. Higher cost, suitable for areas with poor water quality.

6. Microfiltration and Ultrafiltration

Microfiltration is a microporous filter membrane made of cellulose or polymer materials, which uses its uniform pore size to intercept particles, bacteria, colloids, etc. in water, so that they can be removed without the filter membrane. This microporous membrane filtration technology, also known as particle density filtration technology, can filter micron or nanometer particles and bacteria. Ultrafiltration and microfiltration belong to membrane separation technology, and there is no obvious boundary between them. The working pressure of ultrafiltration is generally about .3 MPa, which can remove macromolecular substances, bacteria, viruses and so on in water, but the flux is low.

7. compound

when it is difficult to remove harmful substances from water by one process, it is compound to adopt two or more processes. Such as activated carbon adsorption, ultraviolet sterilization, activated carbon adsorption, reverse osmosis, activated carbon adsorption, microfiltration (ultrafiltration), polypropylene superfine fiber, activated charcoal, microfiltration (ultrafiltration) and so on. Among the compound water purifiers, the membrane technology compound water purifier has excellent water purification performance, especially in removing microorganisms (bacteria, algae, etc.). Some of the excellent water purifiers can directly drink raw water, which has been welcomed by consumers and has become a hot spot in the current development of water purifiers.

from the above classification methods of water purifiers, it is not difficult to see that domestic water purifiers are essentially miniaturization of advanced water treatment, and their main treatment targets are turbidity, chromaticity, odor and organic matter in tap water. It generally consists of three parts: pre-filtration (coarse filtration), adsorption and fine filtration (microfiltration, ultrafiltration and reverse osmosis). Among them, adsorption (usually activated carbon adsorption) and fine filtration are the main means to remove organic matter, odor and chromaticity in water, and the objective operation directly affects the effluent quality of water purifier. Household water purifiers serve thousands of households. However, due to the great differences in water quality and water pressure conditions in the areas where they are used, users lack the necessary operating knowledge, and product design cannot cope with the ever-changing situation. Therefore, manufacturers of water purifiers should consider letting users master certain professional knowledge, standardize the installation and operation of water purifiers, and make the effluent quality achieve the ideal effect, so as to reassure users.

The design and manufacture of water purifier is a comprehensive science and technology. The design principle of water purifier should be for the sake of users. As far as the characteristics of water quality in various regions of China are concerned, the organic pollution along the Yangtze River and densely populated areas is serious, while the problem of bacterial pollution exists in small water supply enterprises and groundwater use areas in towns and villages all over the country. Therefore, only some high-quality water purifiers can adapt to different water quality in different parts of the country, so water purifier manufacturers should carefully design water purifiers that can adapt to different water sources but have good treatment effects according to the water quality conditions in different regions.