1. Boiling method
It refers to drinking tap water after boiling, which is an ancient method and widely used in China. Boiling water can sterilize, but it can't remove some chemicals and heavy metals. Even if the content is extremely low, it is still unsafe to drink.
2. Mineralization method
Refers to adding mineral elements (such as calcium, zinc, strontium, etc.). ) on the basis of purifying the water beneficial to human body, it aims to play 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 effect of artificial mineralization is still a controversial issue.
3. Water purifier
This is a product newly invented in Japan. It first purifies water and then carries out electrolytic activation. Its alkaline activated water corresponds to the PH value of human body's internal environment, which has health care function for human body and is suitable for drinking. Acidic activated water can be used for washing face and bathing, and has cosmetic effect. However, there are still 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 (can be divided into the following three forms)
It is usually made of carbon-containing substances such as essence, coal quality, fruit shell (core) by chemical method or physical activation method. It has a large number 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 in the amorphous part of the surface of activated carbon, which makes the 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 membrane separation technology, which uses pressure to make water pass through a synthetic membrane, only allows pure water to pass through the membrane and excludes pollutants. 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 drinking water problem for lunar astronauts after years of efforts. The cost is high and it is suitable for areas with poor water quality.
6. Microfiltration and ultrafiltration
Microfiltration is a microporous membrane made of cellulose or polymer materials, which uses its uniform pore size to intercept particles, bacteria, colloids and so on. In water, so that they can be removed without a filter membrane. This microporous membrane filtration technology, also known as particle density filtration technology, can filter micron or nano particles and bacteria. Ultrafiltration and microfiltration are both membrane separation technologies, and there is no obvious boundary between them. The working pressure of ultrafiltration is generally about 0.3 MPa, which can remove macromolecular substances, bacteria, viruses, etc. from water, but the flux is low.
7. Compound type
When one process is difficult to remove harmful substances from water, two or more processes are used, which is the composite process. Such as activated carbon adsorption, ultraviolet sterilization, activated carbon adsorption, reverse osmosis, activated carbon adsorption, microfiltration (ultrafiltration), polypropylene superfine fiber, activated carbon, microfiltration (ultrafiltration) and so on. Among the composite water purifiers, the membrane technology composite water purifier has excellent water purification performance, especially in removing microorganisms (bacteria, algae and so on). ). Some excellent water purifiers can directly drink raw water, which has been welcomed by consumers and has become a hot spot in the development of water purifiers.
From the above classification methods of water purifiers, it is not difficult to see that the kitchen water purifier is essentially a miniaturization of advanced water treatment, and its main treatment objects are turbidity, chromaticity, odor and organic matter in tap water. Generally, it 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 their objective operation directly affects the effluent quality of water purifier.
Kitchen water purifiers serve thousands of households, but due to the great differences in water quality and water pressure conditions in different regions, users lack the necessary operating knowledge, and today's product design cannot cope with the ever-changing situation. Therefore, the 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 and 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 villages and towns 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 effect according to the water quality situation in different areas.
Technical parameters:
1. Flow range: 40 ~ 1000m3/h
2. Filtering accuracy:100 ~ 2000μ m.
3. Working pressure: 0. 1 ~ 0.35 MPa
4. Pressure loss: ≤ 0.0 16 MPa
5. Diameter of drain valve: DN 20mm.
6. Discharge time: 50 ~ 600 seconds
7. Water consumption for sewage discharge: < 1%
8. Applicable temperature: ≤ 85℃
9. Power supply: AC three-phase 380V/50Hz (not required for some).
10. Control interface: digital display, knob, switch, manual.
1 1. Filter type: 3 16 stainless steel.
12. Material: FRP stainless steel