Knowledge | Water Purifier Filtering Principle
With the deepening of industrialization, there are more and more pollutants in rivers. Tap water is taken from rivers and rivers, and some pollution is inevitable. Nowadays more and more families choose to install water purifiers to solve tap water. Water quality problems. So, what is the working principle of water purifier filtration?
Water filter filtration uses a filter element and is a physical filtration process. It separates water molecules from other impurities through the size of the grid on the filter element.
Water purifiers generally have a variety of filter elements, each of which has a different impurity. Filter elements such as PP cotton activated carbon, as well as ultrafiltration membrane, reverse osmosis RO membrane, and other types.
1
First level: PP cotton
PP cotton is mainly made of rust, sediment and other large particles from the water. The large particles are isolated on the outside through the filter holes on the PP cotton.
Second stage: granular activated carbon
Granular activated carbon has an adsorption function, can adsorb residual chlorine in tap water, remove the odor of tap water, and can also absorb color substances and restore the thoroughness of tap water.
Third stage: compressed activated carbon
Compressed activated carbon and granular activated carbon work the same, but the effect is better.
1. Compressed activated carbon particles are fine, using hair hole technology, the diameter is tortuous, which greatly prolongs the contact time between water and activated carbon during use;
2. The decolorization effect of compressed activated carbon is good;
3. Compressed activated carbon has high precision and more abundant filtration, and the water outlet is ensured;
4. Compressed activated carbon filtration accuracy can be controlled;
5. Compressed activated carbon is more environmentally friendly.
Compressed activated carbon filtration precision controllable
Small class
Then there are small partners to ask since compressed activated carbon has more advantages than granular activated carbon, why our water purifiers do not directly contain compressed activated carbon, why should we install granular activated carbon? This involves the rationality of the water treatment process.
First of all, if the activated carbon in the water purifier is replaced by compressed activated carbon, the water discharge efficiency may be reduced by at least half on the existing basis. Secondly, water purification is a step-by-step filtration process, so multi-stage filtration is required. Eliminate pollutants in water; finally, the cost of granular activated carbon is lower than that of compressed activated carbon.
Fourth stage: RO film
The RO membrane filters all of the above impurities and is mainly used to filter heavy metals in tap water because of its smallest pores. At this point, almost all of the pollutants in the tap water are filtered and can be directly consumed.
Granule
Level 5: Rear activated carbon (T33)
Using the adsorption principle of activated carbon, it can effectively remove residual chlorine, toxic and harmful substances in water, and improve water quality and taste.
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