Why is the acid content in the products from the two towers in the methanol online process normal while the acid content in the final product is above the specified limit, and what are the solutions?
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The acid content measured through on-line sampling and testing in both the pressurized tower and the atmospheric pressure tower of the distillation system is entirely normal, meeting the standards for top-quality products. However, when testing the acid in the metering tank, the levels often exceed the limits, and it is only possible to meet the standards for qualified products. I’m seeking help from all the experts! ! Waiting online~~~
How is sampling from the inlet metering tank? Is sampling from the metering tank representative? How is the sample circulation? Has air entered?
The acid level in the metering tank is also high; I’m about to try reverse mixing. The thing is, this didn’t happen before
If the system is operating properly, run a cycle to release the acidic gases dissolved in methanol; if there is a nitrogen pipeline, supply nitrogen to the metering tank for purging. For reference