Coking problem in dry gas compression of UOP dehydration process
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Ladies and gentlemen: At present, coking in the dry gas compressor occurs roughly once a week. The measures taken include draining liquid, reducing temperature, and lowering flow rate. Since it is not possible to treat the desiccant or replace the main catalyst on-site, repairs are the only option; however, this involves a large amount of work, and stable operation of the equipment cannot be guaranteed after just a few days of such repairs. At present, the technical improvement involves adding oil removers; additionally, someone has suggested adding spin separators. Those with similar experience are encouraged to get in touch for discussion.
Adding an oil remover is only a temporary solution; carbon deposition occurs due to the high content of olefins in the dry gas. It could be that the separation efficiency of the cold box is not good, or there may be other reasons, which would need to be analyzed by process engineers
If it is not possible to remove the olefin content from the dry gas in the current process stage, and the viscosity of the olefins is not high, an additional high-efficiency gas-liquid separator can be used to solve the problem.
It does seem quite serious; it’s necessary to approach the issue from a technical perspective – relying solely on maintenance isn’t enough.
The separation effect of a swirl separator is not necessarily good. electroadsorption