Is it harmful to operate a boiler with a total alkalinity of over 200 mmol/L?
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It seems that the boiler operators regard slag discharge as a burden, discharging only a small amount symbolically every day; as a result, the alkalinity of the boiler water is now significantly too high. Even when warned about this, no one pays any attention. It seems that according to the requirements for water quality in industrial boilers, if the quality of steam is not a major concern, the range for alkalinity can be adjusted accordingly. I would like to ask whether operating within such an alkalinity range poses significant risks to the boiler What would be the approximate standard if the alkalinity range is expanded?
When the alkalinity in boiler water is too high, it can cause alkaline corrosion and stress corrosion cracking of the boiler water wall tubes； It can also cause foaming in the boiler water, and even lead to \"foam flooding,\" thereby affecting the quality of the steam. In riveted or expansion-joined boilers, too high an alkalinity can also cause caustic embrittlement. Therefore, it is necessary to monitor the alkalinity of boiler water. The quality control parameters for boiler water can refer to the “GBT1576-2008 Industrial Boiler Water Quality Standards”.