Vibration of the pyrolyzer feed pipe
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After the furnace tubes burned out during this major repair, the feed pipeline of the pyrolyzer experienced significant vibration. There is preheating before feeding; considering the vaporization issue, we reduced the feeding temperature, but it still didn’t work ； Is it possible that there is stress in the furnace tube? ； Vaporization occurs through a heat exchanger pressure drop before feeding. Let the experts from all over analyze it!
There might be fluctuations in flow rate or pressure, which could also lead to partial vaporization and the formation of a two-phase flow. The solution can be achieved by adding restrictive braces or dampers.
It was working fine before, but after the major overhaul and burning out, it stopped working; even when the feed preheater was disconnected, it still didn’t work.
The flow characteristics of the material in the pipeline have changed
To be more specific, how can vibration be eliminated?
Main causes: first, loose support; second, two-phase flow. 1. Check the pipe supports to see if they are displaced or loose. 2. After scorching (should chemical and mechanical cleaning have been done?) ) Are there any mechanical damages to the cracking furnace tubes? For example, what if there is a minor leak that causes the material to seep into the furnace? 3. Has the preheater been descaled? Is there a possibility of throttling flashing in the piping system?
The third possibility is that the preheater was not cleaned this time.
The problem has been resolved; the feed temperature has decreased a bit. Insulating a few meters of the pipeline connecting to the feed pipe solved the issue, and the vibration is now very low – I’m not sure why.