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nature : containing calcium, magnesium salt more water. The water and calcium magnesium with soap and chemical production difficult role of water-soluble calcium (magnesium) salt precipitation, soap lose decontamination capability. Calcium, magnesium carbonate more acid water as a temporary hard water, boiled when decomposed into bicarbonate and carbonate precipitates in the form of encrustation, as well. Calcium, magnesium sulfate more water called permanent hard water, boiled when no precipitation precipitation, such as seawater. Water soluble these small calcium, magnesium salt category usually per million the number of water containing calcium carbonate said. Hard water for boiler feed water, it must soften, the boiler wall furring impede heat transfer, more fuel consumption and can cause localized heating, boiler damage, or even trigger an explosion. The most commonly used method is water softening ion exchange agent (such as sulfonated coal, ion exchange resin, etc.) to remove the metal salts in the water.
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