What is the difference between softened water, boiler water, and desalinated water?

The softened water and deionized water here are the same thing. The boiler water is deoxygenated water.

This post was last edited by ylb913 on 2016-11-8 at 13:32. 1. It has been noted that the concept of softened water is not applied in a consistent manner; different companies have varying understandings of it. Literally, it means no scaling occurs – deionized water ； However, many facilities also refer to water that has been desalted as well as deoxygenated as softened water (this was how it was done in our factory over twenty years ago). 2. For boiler water, we use deoxygenated water (desalination first, followed by deoxygenation). 3. The commonly used term (as specified in standard guidelines) is demineralized water and deoxygenated water (deoxygenated water is obtained by further deoxygenating demineralized water). Deoxygenated water is used for feeding water into boilers, while demineralized water is used for feeding water into deoxygenators, as well as for various process applications.

The contents of ions such as calcium, magnesium, sodium, and iron in water vary

Boiler water refers to deoxygenated water. Here, we will explain the difference between softened water and demineralized water. Softened water is water from which calcium and magnesium ions have been removed; since the scaling substances in water are usually composed of calcium and magnesium ions, and it differs from hard water (water containing a high amount of soluble calcium and magnesium compounds), it is called soft water. Demineralized water is water from which the vast majority of metal ions have been removed. Compounds formed by the combination of metal ions and non-metal ions are known as salts, which is why it is called demineralized water.

Softened water removes calcium and magnesium ions from the water; deionized water is obtained by further removing all salts from softened water. Boiler water is created by deoxygenating deionized water. The level of difficulty involved

Generally, water from which calcium and magnesium ions have been removed is considered softened water; however, demineralized water removes more salts than softened water

Calcium and magnesium ions are responsible for hardness; after passing through the deaerator, the demineralized water becomes boiler water, which is used to produce steam

Generally, water from which calcium and magnesium ions have been removed is considered softened water; however, demineralized water removes more salts than softened water