Coal tar hydrogenation
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What are the reasons for the large fluctuations in reactor pressure differential in coal tar hydrogenation units?
A large pressure difference indicates that there is some blockage in the reactor: 1. Issues with raw material processing, the influence of various components, etc. 2. Catalyst loading issues 3. Process control, etc
How many layers does the reactor bed have, and which layer has the highest pressure drop? It would be best to have a DCS screenshot
Large fluctuations? Isn’t it always rising?
Coal tar usually contains phenols, which readily react to produce water.
Specifically, for that reactor, what is the hotspot temperature in that bed layer?
Mm-hmm. It’s just fluctuating; it hasn’t gone up.
Mm-hmm. That’s true too. Our unit doesn’t have a pressure relief system; it’s probably due to the effect of phenol oil
Our refined reactors A and B share one differential pressure gauge; the temperatures are all normal, and no hot spots have formed