Reasons affecting phosphate levels in boiler feedwater
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There are two identical sulfur recovery units in the workshop, and the condensate water used for the boilers comes from the same source. The difference between the two units is as follows: one unit has an economizer added to its exhaust gas system; the deoxygenated condensate water is heated through this economizer before being fed into the boiler, while in the other unit, the deoxygenated condensate water is fed directly into the boiler. So, what are the problems? 1. The unit added for the economizer has never had chemicals added to it, and the phosphate level in the boiler water has remained very stable. 2. For the boiler set without a economizer, chemical addition must be continued in order to keep the phosphate level in the boiler water stable. What are everyone’s thoughts on this phenomenon? What causes such a situation?
Put simply, when boiling water in a kettle, scale forms on the inner walls of the kettle; the higher the temperature, the more scale forms!