Will adding a certain amount of NaOH to the system cause scaling on the tubes of the tower reboiler?
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Will adding a certain amount of NaOH to the system cause scaling on the tubes of the tower reboiler? I’d like to ask everyone!
Adding anything that may produce solids will cause scaling. However, sodium hydroxide may inhibit the scaling of other substances; in the low-temperature methanol wash pre-washing, regeneration, and distillation columns, systems for injecting sodium hydroxide are specifically installed in the reboilers
No, it is added to prevent scaling; it functions as a scale inhibitor. However, the best way to prevent scaling is to reduce the residence time of the material in the heater
When there is sufficient water in the material at the bottom of the tower, scaling does not occur; however, when there is little residual water, solid salts or alkalis precipitate and cause scaling.
There is a risk of scaling, but it is necessary to control the amount of alkali added to ensure the accuracy of the instruments. The temperature of the reboiler should not exceed the design value; the circulation rate should be high, and the liquid level in the bottom of the tower should be low.