Differences in water

1. Soft water: Water that flows through acidic igneous rock formations, with low salt content, a bicarbonate level of less than 25 mg/L (as CaCO3), and a hardness of less than 50 mg/L (as CaCO3). 2. Hard water is water that flows through limestone and contains large amounts of alkaline substances, with a bicarbonate content of more than 100 mg/L (as CaCO3) and a hardness of more than 150 mg/L (as CaCO3). What we usually refer to as \"hard water\" and \"soft water\" relates primarily to the levels of calcium carbonate and magnesium carbonate, which are expressed in terms of \"milligrams of calcium carbonate per liter of water\" or \"ppm\", and this is what is known as water hardness. 　　Water hardness is generally classified into 4 grades: 3. Desalted water refers to the finished water obtained by using various water treatment processes to remove impurities in water such as suspended solids, colloids, and inorganic cations and anions. 4. Process water is the water required for production processes. 5. Raw water: Water taken from natural or man-made water bodies such as rivers, lakes, ponds, or underground aquifers, and used as a source of water supply ； Or it refers to the water that flows into the first treatment unit of the water treatment plant. The water in the reservoirs used by water treatment plants to regulate the water pressure in the supply network is not raw water. The quality of raw water varies depending on the source. 6. Chilled water: Chilled water is used to deliver the cooling capacity generated by air conditioning systems to the rooms via pipes and chilled water pumps; it is the water through which the indoor fan-coils (or air conditioners) transfer this cooling capacity into the space. In simple terms, chilled water is the medium that transfers cold energy from the air conditioning room to the rooms where it is used for heat exchange. 7. Pure water, also known as purified water or deionized water, refers to water that is obtained by using water meeting the sanitary standards for drinking water as the raw material, and then processing it through methods such as electrodialysis, ion exchange, reverse osmosis, distillation, and other appropriate techniques. It is stored in containers, contains no additives, is colorless and transparent, and can be consumed directly. It can also be referred to as a pure substance (in chemistry). It is widely used in experiments; since it is produced by methods such as distillation, it is also called distilled water.

Please take a look to see the difference. Thank you to the original poster for giving me this opportunity; I had doubts too, and I did some thorough research today. . . . .

In chilled water, substances such as calcium chloride or sodium chloride are added in order to convey cold energy below zero degrees, thereby lowering the freezing point and preventing freezing at low temperatures. The circulating chilled brine in our factory is an aqueous solution of calcium chloride.

However, this kind of saltwater has a strong corrosive effect on pipes and valves. And if the temperature is any lower, it can no longer be used. Recently, in pilot tests, alcohol was used as a coolant to transfer cold energy of minus fifty degrees.

Soft water and hard water are defined in relation to the concentrations of Ca and Mg ions; high levels of these ions can lead to the formation of scale. This is especially true for water used in boilers, as the presence of scale impairs heat transfer and can result in safety hazards. Pure water is water that contains basically nothing in it; it’s extremely clean, and Wahaha pure water is a representative example of such water. A representative of raw water is mineral water.