Why is Soft Water Needed for Steam Boiler
2018-07-31 16:25:52
Water softener removes the hardness (Calcium Ca, Magnesium Mg) in raw water (Hard Water) and changes the hard water to the soft water. For daily use of boiler, the soft water is checked by the hardness indicator.
Then, why is the soft water needed for the steam boiler?
If the supply water contains the hardness, the hardness is condensed in the boiler as heating, becomes the scale, and then adheres inside the water tube. Then, the heat efficiency declines remarkably as the scale adhesion because the heat conductivity of the scale is very low.
Generally, the main troubles are the followings.
1) Heating surface of the water tube is over heated, and then brings about the factor of water damage.
2) The heating transfer is prevented, and then brings about the low boiler efficiency.
3) The flow area of the water tube is decreased, and then brings about bad circulation.
The scale is insoluble, if the scale adheres on the water tube, it is very difficult to remove it, the large scale work such as chemical cleaning is needed. Moreover, if the worst comes to the worst, the water damage is caused, and the large risk and cost such as water tube replacement and boiler body replacement is required.
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