API682 —— Seeking assistance with PLAN23-related issues
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\"Special care should be taken when using Plan23 with fluids that have a high freezing point and high viscosity.\" The cooler may cool the flushing fluid below the circulation temperature; in such a case, steam can be considered as a cooling medium. What does it mean for the flushing fluid to be cooled below the circulation temperature?
It is because of the high solid content and high viscosity; when the temperature drops, the medium solidifies and stops flowing. The so-called circulation temperature is likely the solidification temperature, or a temperature close to that of solidification
Scheme 23 involves a small circulation within the sealed chamber; the heat exchanger is subjected to a low load. If the medium has a high viscosity, there is a risk of blockage after cooling, but the use of steam ensures that flow remains possible even after cooling
It’s because the heat exchange efficiency at 23 is too high; the temperature drops below the freezing point of the medium, causing it to accumulate and stop flowing