Some questions regarding the Chevron hydrocracking design
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Are there any experts in the group who use the Chevron hydrocracking process? Generally, in hydrocracking reactions, the heat is exchanged between the reaction products and the feedstock; the oil produced flows through the tube side, while the feedstock flows through the shell side. Chevron’s design involves the feedstock flowing through the tube side, while the produced oil flows through the shell side. Why is it designed this way, and what are the advantages? Furthermore, the residue from the Chevron process is also designed in this way. Why?
The crude oil is quite dirty, has a low temperature and high viscosity, which makes clogging likely; therefore it flows through the tube side. The oil produced has a higher temperature, lower viscosity, and is a mixture of oil and gas – this is the result of taking all these factors into account
Then why do others, such as those from UOP and SEI, use the shell side? Similarly, the feed materials are also dirty. In the residue hydrogenation process designed by the Luoyang Institute, the feedstock also flows through the tube side; the biggest drawback is that the heat exchangers tend to clog, resulting in low heat exchange efficiency.
The UOP wax oil cracking process uses the tube side.
The guy upstairs is from Zhejiang Petrochemical, right? The feed for the large catalytic cracker at Zhejiang Petrochemical flows through the tube side.
The UOP cracking feed oil is also in the tube side