System pressure retention
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When the system is held at pressure, does the temperature of the catalyst layer affect the duration of pressure holding? What would be the impact if so? For example, when charging the same bottle of N2, which scenario – at a coal seam temperature of 400 degrees or 100 degrees – allows for a longer duration of maintenance?
Of course, it is because the catalyst layer was kept at 100°C for a long time.
Temperature certainly has an impact; we generally maintain pressure at the operating temperature
2# Yan Qiusheng What’s the reason?
We usually require heat preservation during pressure holding.
It is likely that the holding time at low temperatures is longer; the reason is as follows: When holding and maintaining temperature at high temperatures, the process gas in the bed is hot gas. After nitrogen is introduced, there is first a heating process for the nitrogen, which correspondingly results in a cooling process for the bed. As the temperature drops, the pressure also decreases
If the system can recover in a short time, heat and pressure are maintained; if it takes a long time to recover, nitrogen is introduced, causing the temperature to drop more rapidly at high temperatures and less so at low temperatures