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For your information on this problem. We discovered that the distillation tower bottoms temperature was running below design and that our propylene losses to bottoms was also higher than design (No focus on optimization here because of low propylene demand). After upward adjustment of the...

The steam supply is actually at 8 bar with the pressure downstream of the flow control valve at around 3.3 bar. The condensate drum pressure is being controlled at around 2.9 bar. I suspected that steam was blowing through and adjusted the setpoint on the condensate drum pressure controller...

As I understand from colleagues this is pretty much a start up problem. Although we had some damage to pipe supports the piping does not seem to have shifted too much.

I have come accross a reboiler design that I am not familiar with on one of our plants where we have a severe water hammer on the condensate side of the reboiler. This reboiler is installed horizontally with the column bottoms circulating on the shell side and the steam going through the tubes...

We have a hydrogen stream being fed to our plant that is sometimes of spec on CO resulting in a loss of catalyst activity to our reactor for partially hydrogenating acetylene to ethylene. Currently we are looking at using an activated carbon bed in a redundant drier vessel to protect the...