How to remove limescale?

Softening the water softener to buy Water softening - the removal of her hardness cations - calcium and magnesium. According to the national standard hardness of water for household purposes must not exceed 7 mmol/dm3. In agreement with the sanitary control bodies that rule can be extended to 10 mmol/dm3. In some areas of manufacturing technology for water quality are more stringent - 0.05 ... 0.01 mmol/dm3. As usual, the source of water that is used for drinking water, meet the standards of drinking water and softener because it does not hold. If the content of hardness salts in natural water exceeds regulatory requirements, apart from the processes of iron removal, bleaching and disinfecting of water softening is carried out. Water softener, such methods are used: reagent, thermal, ion exchange, dialysis, combined. Reagent methods are based on the distance from the water of Ca2 + ions and by using certain chemicals that will transform them into practically insoluble compounds. In thermal method of softening water is heated, distilled, or frozen out. The basis of ion exchange is filtered through water softens special materials, ion exchangers, which exchange Na + ions from the ion exchanger for the ions Ca2 + and Mg2 + water. Dialysis softener based on different rates of diffusion of salts of hardness through polupronikaemuyu membrane. Combined methods - these are different combinations of the above methods. Selecting an image softening depends on the quality (chemical composition), the necessary depth of softening and techno-eco-ekonomicheskih considerations. The preliminary findings suggest that water from surface sources appropriate to soften the reagent ways, if at the same time carry out its iron removal and bleaching. Softening of groundwater is advisable to use ion exchange. Frequently to remove hardness, especially for deep water softening, combine different ways: some calcium and magnesium ions are removed reagent methods, and the rest are removed cation exchange. water softeners