Reasons why propylene cannot be separated
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There is a vapor separation unit here. Tower A for propylene is operating normally; the feed to Tower A contains 6 tons per hour of propylene. However, after entering the tower, only 3 tons of propylene emerge from Tower B. Additionally, 3 tons per hour of propylene cannot be separated at the bottom of Tower A, resulting in an unsuitable composition at the bottom of that tower (with 50% each of propylene and propane). Please advise!
Some propylene has been extracted from propane; please take a look at the chart above to see the parameters. A mere description like this isn’t very meaningful; there are many reasons for this.
The operating parameters are normal. This unit had not been in use for 7 years; it was restarted this year. Is there any blockage? The temperature and pressure are normal, and the pumping capacity of the bottom pump in Tower B is also high
I’m wondering if there’s a problem with Tower B?
Is it that the designed processing capacity isn’t that high?
Do you think the internals of the tower might get clogged?
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The condition of the tray should be checked; equipment that has not been in use for 7 years requires a thorough inspection before it is put back into operation.
Check whether there are any issues with the internal components of the tower; if not, verify whether the process operation parameters are normal