Ah, I just want to say that time flies in the boring life under the epidemic. This post has been for three years. Many of the good suggestions mentioned may never be completed (although I still hope they will be added, such as pyrolysis furnace and large crystallizer), which is really a pity.
The reason why I want to mention now is that I have a cousin with a doctor of petrochemical who got married some time ago (the reason why I am interested in this aspect is that I think I can get some help from him, which is one of the reasons why I always hope gt6 can join these).
This may be a bit of “dig tomb” (Chinese Internet terminology refers to replying to posts that have not been answered for a long time in the forum community. This behavior is considered to be deliberately damaging the page in many communities and is prohibited, but it should be no problem in a very cold community such as GT Forum).