Airtightness of diesel hydrogenation unit
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During the airtightness process, if there is a leak in the high-pressure system or the circulation pump stops operating, it is necessary to start a new hydrogen supply unit to ensure gas flow through the reactor bed. Why?
As the hydrogen circulation rate in the hydrogen circulation compressor decreases, the device will be triggered to shut down urgently; fresh hydrogen is then supplied by a new hydrogen generator, and the reactor bed temperature is controlled through the discharge of waste hydrogen, in order to prevent the catalyst from overheating and coking – after all, hydrogen can raise temperatures quite rapidly!
Avoid overheating caused by gas retention
Ensure gas flow through the reactor bed to carry away heat and prevent catalyst coking due to overheating
You’re referring to the airtightness of hydrogen, right? I’ve read many responses, and in most cases, during production, the airtightness of hydrogen is ensured through controlled temperature and pressure to prevent backfire in the reactor. However, once a leak occurs, the usual approach is to try to seal it up. If the hydrogen circulation compressor stops working, it’s best to get it running again as quickly as possible; if that’s not possible, it’s better to release pressure to avoid backfire due to low temperatures
This is part of the production process, right? The original poster was referring to the airtightness testing stage
This is an explanation for production, not one for airtightness, right?
That’s not answering the question; the original poster was asking about the airtightness process
How to protect against coking during the airtightness process?