Water purification information

What is the difference between softened water and other water

Views : 96380
Update time : 2021-09-24 15:03:21
In daily life, we often see scale formation on the inner wall of the kettle after being used for a long time. What is the reason? It turns out that the water we take contains many inorganic salts, such as calcium and magnesium salts. These salts are invisible to the naked eye in water at room temperature. Once they are heated and boiled, a lot of calcium and magnesium salts will precipitate out as carbonates, and they will form scale when they cling to the kettle wall.

We usually use the index of "hardness" to express the content of calcium and magnesium ions in water. A hardness of 1 degree is equivalent to 10 mg of calcium oxide per liter of water. The water below 8 degrees is called soft water, the water above 17 degrees is called hard water, and the water between 8 to 17 degrees is called moderately hard water. Rain, snow, rivers, rivers, and lakes are all soft water, spring water, deep well water, and sea water are all hard water
Raw water refers to untreated water. In a broad sense, the water before entering the water treatment process is also called the raw water of the water treatment. For example, the water sent from the water source to the clarification tank is called raw water.
  
Softened water refers to water whose hardness (mainly refers to calcium and magnesium ions in water) has been removed or reduced to a certain extent. In the process of water softening, only the hardness decreases, while the total salt content does not change.

Desalting water refers to water that has been removed or reduced to a certain extent by salts (mainly strong electrolytes dissolved in water). The electrical conductivity is generally 1.0~10.0μS/cm, the resistivity (25℃)(0.1~1.0)×106Ω˙cm, and the salt content is 1~5mg/L.

Pure water refers to the water that has been removed or reduced to a certain extent by the strong and weak electrolytes (such as SiO2, CO2, etc.) in the water. The electrical conductivity is generally 1.0~0.1μS/cm, and the electrical conductivity (1.01.0~10.0)×106Ω˙cm. The salt content is <1mg/L.

Ultrapure water refers to the water in which the conductive medium in the water is almost completely removed, and the non-dissociated gases, colloids, and organic substances (including bacteria, etc.) are also removed to a very low level. Its electrical conductivity is generally 0.1~0.055μS/cm, resistivity (25℃) ﹥10×106Ω˙cm, salt content ﹤0.1mg/L. Ideal pure water (theoretically) has a conductivity of 0.05μS/cm and a resistivity (25°C) of 18.3×106Ω˙cm.
Related News
Read More >>
Household water purifier water dispenser selection guide: understand the filtration technology focus on water quality needs focus on brand after-sales Household water purifier water dispenser selection guide: understand the filtration technology focus on water quality needs focus on brand after-sales
Dec .25.2024
Household water purifier water dispenser selection guide: understand the filtration technology focus on water quality needs focus on brand after-sales service
When buying a water purifier, do we choose single or dual outlet water? When buying a water purifier, do we choose single or dual outlet water?
Dec .25.2024
Water filtered from water purifiers on the market is generally categorized into two types, purified water and pure water. Among them, pure water refers to H2O without impurities. Tap water is filtered through RO (reverse osmosis) membranes, which can remove heavy metals, organics, scale, bacteria, viruses and other harmful substances, filter out minerals, and turn into pure water. Pure water contains almost no other substances and can be drunk straight.
“ 0 ZERO WATER “What exactly is a water purifier? Do you know? “ 0 ZERO WATER “What exactly is a water purifier? Do you know?
Dec .24.2024
Now a lot of people say that the water purifier to buy ZERO WATER, many manufacturers are also publicizing 0 ZERO WATER water purifier.
The market publicity and everyone understands the “0 water” is actually the first cup of water TDS value is relatively high problem.
Do you know what indicators we should look at when buying activated carbon water filter cartridges? Do you know what indicators we should look at when buying activated carbon water filter cartridges?
Dec .24.2024
Activated carbon filter is basically the same as multi-media filter in structure, the difference is that it is equipped with activated carbon with strong adsorption function, which is used for removing organic matter not removed by filtration and adsorbing residual chlorine in water, so that residual chlorine in effluent water is ≤ 0.1mg/L, SDI ≤ 4. Chlorine belongs to strong oxidizing agent, and it has a destructive effect on various types of membranes, especially reverse osmosis membrane is very sensitive to residual chlorine, therefore, for pure water production line which takes city tap water as water source, the more important function is to adsorb residual chlorine in water, which plays the role of protecting RO membrane. Therefore, for the pure water production line using city tap water as the water source, the main function of activated carbon is to adsorb the residual chlorine in the water and protect the RO membrane.