Introduce the water treatment methods for corrosion and blockage in central heating systems

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1. Ion exchange water softening: The principle of sodium ion exchange softening involves using the sodium ions in table salt solution to replace the calcium and magnesium ions in water, thereby reducing the water’s hardness and preventing scale formation. However, the reverse washing water contains large amounts of chloride and sodium ions, which can cause pollution of groundwater. At present, sodium ion exchange softening is widely used for water treatment, but the issue of groundwater pollution caused by it deserves sufficient attention. 2. Addition of corrosion and scale inhibition agents. This method is suitable for heating systems with low water loss; if the system has high water loss, a large amount of these agents will need to be added, which will inevitably result in the formation of excessive sludge within the system, thereby harming its operation. Currently, there are a wide variety of corrosion and scale inhibition agents with complex compositions, generally including chemical substances such as trisodium orthophosphate and alkaline substances like sodium hydroxide ； Sodium sulfite, sodium tannate, and other inorganic or organic deoxidizers. Some organically synthesized anti-corrosion and scale-inhibiting agents can also be used.