How to determine internal leakage in the heat exchanger between hydrogenated refined diesel and light fraction oil
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How to determine internal leakage in the heat exchanger between hydrogenated refined diesel and light fraction oil? Could you please give me some advice?
Conduct a distillation range analysis on the hydrogenated refined diesel; if its initial boiling point is below 100 degrees (provided that the stripping tower is operating properly and the refined diesel does not exchange heat with other materials), it indicates that there is a leak in the heat exchanger!
When the internal leakage is low, it can only be determined through laboratory analysis of diesel and light oil data, such as flow rate and sulfur content. When the internal leakage is severe, it can be determined whether there is internal leakage by observing abnormalities in operating parameters such as diesel flow rate, light oil flow rate, and valve opening degree.
This issue isn’t complicated; we need to measure the sulfur content in low-grade oil at regular intervals. When the sulfur content in refined diesel rises unexpectedly, we then compare it with that of the low-grade oil from before. This can also be seen from the changes in the flash point, color, and bromine value of refined firewood. Through the comparison of process parameters, such as liquid level, pressure, control valve opening degree, yield, and so on, some insights can be gained.