Solutions and measures for overheating at the air-cooled outlet of the hydrogenation reaction?
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What are the solutions and measures to address the overheating at the exit of the air cooling system for hydrogenation reactions, without replacing the air cooling tube bundles in the hydrogenation unit?
It’s still necessary to identify the root cause of the overheating and address it accordingly； Temporary measure: Switch to wet air cooling ；
Due to changes in the production plan, it is overloaded.
Is there water cooling further back? If so, what is the final temperature after cooling? Do you plan to keep doing this in the long term? Previously, I encountered situations where the temperature became extremely high after a short period of cooling; this lasted for 1 to 2 weeks. In such cases, I made my own spray pipes above the air cooler and used demineralized water to cool it down, which helped reduce the temperature by 3–5 degrees. I certainly wouldn’t do that of constantly overloading and exceeding temperature limits – it’s illegal!
That still doesn’t solve the underlying problem; the temperature is still a bit higher than normal.
First, identify the reasons for the excessive exit temperature and take measures accordingly: (1) The processing volume is too high, resulting in a low load on the air cooling system; this can be addressed by adjusting the processing volume or the hydrogen flow rate. (2) If the inlet temperature of the air cooling system rises, the heat exchange process at the earlier stages needs to be adjusted. (3) If the air cooling fans do not have sufficient capacity or the frequency converters are malfunctioning and prevent full operation, the angle of the fan blades should be adjusted or the frequency converters repaired. (4) If there is severe scaling on the surface of the air cooling tubes, the surface needs to be cleaned. (5) If scaling inside the air cooling tubes causes blockages or uneven flow, operations must be halted to clear these issues. The fourth issue to consider is that if the surface is dirty, use a cleaning vehicle with the pressure set at around 5-6 kg (too high a pressure can cause the fins to deform, while too low a pressure results in poor cleaning efficiency); after cleaning, the temperature drops by more than 10 degrees (this is based on practical experience and can be used as a reference).
Please explain: How is the spraying method carried out, what kind of water is used, and is it necessary to recycle it?