Leakage detected at the high-pressure exchange unit of the hydrogenation plant
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Our hydrogenation unit’s high-pressure heat exchangers have been experiencing leaks frequently recently; we’re not sure what’s causing this.
For this device, is it still a weld? What material is it made of? Please explain the specific situation so I can help analyze it
If there is a leak at the flange, it is likely due to large temperature fluctuations.
Most leaks in the high-pressure heat exchangers of hydrogenation units are caused by floating-head seal failures, primarily resulting from production fluctuations as well as rapid temperature increases or reductions. It is necessary to control the temperature difference between the inlet streams on the tube side and shell side of the high-pressure heat exchanger; this difference should not be too large, as otherwise uneven thermal expansion and contraction at the seals of the high-pressure heat exchanger can lead to seal leakage. The temperature is increased at a rate of generally 25°/h.
The main leakage issue we encounter is leakage at the head, caused primarily by large temperature fluctuations. Primarily during shutdown periods, it prevents excessive oil flow and rapid changes in temperature differences. It should be fine to pay attention to this during normal production; as for other issues, it would be due to problems with your equipment.
Please, the original poster, explain in detail which part is leaking and what the situation is Let’s all learn together* and take a look
It is mainly related to temperature fluctuations
Call the person in charge to explain the specific situation – whether it is hydrogenation refining or hydrocracking. It is usually caused by fluctuations in the temperature of the plant, and the probability of this occurring is higher after an abnormal shutdown