This question has already been asked and answered by someone here. After several discussions, the problem was resolved.
This phenomenon is called “manifest hardness”. The hardness we usually refer to is actually calcium and magnesium ions. When we detect the hardness of condensate water, we use the calcium and magnesium ion detection method. condensate water It is formed in thermal equipment and pipes, so a variety of metals are dissolved in the condensate water. Therefore, these metal ions appear to be "hardness" at that time, but they are actually other metals.
As long as you make sure the condensed water is not contaminated or mixed with raw water, ignore it. Feel free to use it!
Trisodium phosphate can soften hard water. According to the request for relevant information, trisodium phosphate is mainly used as water softenerhard. Water contains hardness. An appropriate amount of trisodium phosphate should be added as a water softener to improve the hair effect of fabrics. Inorganic compound, soluble in water, its aqueous solution is alkaline, insoluble in alcohol.