The issue of excessive temperature rise in the reactor bed due to gas injection
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This post was last edited by liaifeng on 2018-8-4 at 19:47. When the reactor is shut down, excessive temperature rises occur; at such times the nitrogen injection pressure is low while the steam pressure is high. Is it possible to inject both nitrogen and steam into the reactor simultaneously? Please discuss, extra points available
As long as the nitrogen pressure is higher than the system pressure, that’s sufficient; however, when using steam, it is important to ensure that it is free of water to prevent damage to the catalyst.
It is best not to inject them simultaneously; nitrogen can be injected first (with the drain valve opened before injection), but the flow rate should be increased gradually based on the bed temperature – it should not be set too high from the start, unless the temperature rises extremely fast and becomes uncontrollable.
Try to inject nitrogen; do not inject steam under normal conditions
Pay attention to maintaining stable system pressure, ensuring proper air distribution, controlling the space velocity, and injecting nitrogen as necessary to protect the catalyst.