With the rapid development of modern industry, water pollution incidents keep emerging. The traditional tap water treatment process has long been unable to meet people's requirements for the treatment process of healthy drinking water. The traditional method of boiling water cannot remove harmful substances such as heavy metals, arsenic compounds, fluorides and nitrites from tap water. It is even more powerless against organic pollutants in tap water (such as pesticides, herbicides, synthetic detergents, etc.). Many people in society who are concerned about drinking water health have begun to consider installing household water purifiers (water treatment equipment) to safeguard the drinking water health of themselves and their families.

　　When these people strolled around the market, they found that there were a wide variety of brands. The salespeople were even exaggerating their own water purifiers and belittling other brands to nothing, leaving even more consumers confused.

　　Below, based on my own experience, I would like to share with you some tips on choosing the right water purifier. Due to my limited ability, there may still be some inappropriate points. I hope you will understand.

　　First, understand the water quality situation in your city

　　The water quality in industrially developed cities or those along rivers is seriously polluted by heavy metals. In rural areas, when using well water, attention should be paid to the hardness of the water (the levels of calcium and magnesium ions) and the pollution of underground radioactive substances to water quality. High-rise residential communities also need to pay attention to the pollution problem of secondary water supply. Many water towers used for secondary water supply are open, with a large amount of dead rats, insects and all kinds of dirty things inside. The city where the author is located, Changsha, mainly suffers from severe heavy metal pollution and secondary water supply pollution (the government often talks about the treatment of heavy metal pollution in the Xiangjiang River Basin). Only by understanding the pollution situation of water quality can the requirements for water treatment processes be determined.

　　Step 1: Selection of core water quality treatment processes

　　Common purification materials for water purifiers on the market, such as non-woven fabric,PPThe general filtration accuracy of cotton, activated carbon, cationic resin, microporous ceramics, gradient ceramics and hydrophilic membranes is0.1The filtration accuracy above microns can still handle relatively coarse pollutants, but it is completely powerless or has very limited processing capacity for organic pollutants, heavy metals, and inorganic salts. This type of purification material is generally used as auxiliary purification material, in combination with ultrafiltration membranes and reverse osmosis membranes(ROmembrane)Nanofiltration membraneKDFA relatively ideal water purification device is composed of water purification treatment materials centered on etc.

　　Characteristics of ultrafiltration membranes: The filtration accuracy can reach0.01It is effective against rust, red worms, sand, colloids and large-molecule organic substances. It does not require electricity, does not produce wastewater, has a large water output and a long service life (generally)3-5(Year). Disadvantage: Limited capacity for handling heavy metal pollution, viruses, etc.

　　Water purifiers with ultrafiltration membranes as the core processing technology are usually called water purifiers in the industry, and the water they produce is generally called mineral water.

　　Characteristics of reverse osmosis membranes: The filtration accuracy can reach0.0001Microns, except for water molecules and oxygen molecules, are basically filtered clean, making it clean water. Disadvantages: Due to its high filtration accuracy and significant filtration resistance, a booster pump is needed for water to pass through, thus requiring electricity. In addition, due to the excessively high precision, the water does not contain minerals and will produce a certain amount of wastewater.

　　Water purifiers with reverse osmosis membranes as the core processing technology are usually called pure water machines in the industry, and the water they produce is generally called purified water or pure water

　　KDF(Kedefi), this core material is widely used in water purifiers, mainly to remove heavy metals, and it has a large water output. It can reach several tons per hour. Common water outputs include1ton2ton3Tons.

　　Step 3: Selection of water treatment combination

　　Due to the current complex water quality, a single membrane filtration component water purifier is difficult to cope with, so it is generally better to choose a combined filter core water purifier. Common5The combinations of stage filters include

　　1:PPCotton (non-woven fabric+2Grade activated carbon (which can be classified into granular activated carbon, compressed activated carbon, sintered activated carbon, etc., with more or less the same functions)+Ultrafiltration membrane+Post-activated carbon (ultrafiltration machine configuration);

　　2:PPCotton (non-woven fabric+2Grade activated carbon (which can be classified into granular activated carbon, compressed activated carbon, sintered activated carbon, etc., with more or less the same functions)+Reverse osmosis membraneRO"Membrane+Post-activated carbon (configured for pure water machines);

　　3,PPcotton+Activated carbon+Ultrafiltration membrane+Reverse osmosis membrane+Post-activated carbon (ultrafiltration and reverse osmosis integrated machine configuration).

　　The common configuration of water purifiers is as follows: activated carbon+KDF

　　Consumers make choices and combinations based on the water quality conditions of their own homes.