Entrapment problem

2015-09-04View Original

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After hydrogenation, we carry out atmospheric and vacuum separation; in the vacuum section, the initial boiling point of the bottom fraction is consistently low, at only 250°C, while the initial boiling point of the first vacuum fraction is around 270°C. What could be the reason for this? Is there any good solution? Thank you. . .

Reply #22015-09-04

Increase the feed temperature and enhance steam injection at the bottom of the tower.

Reply #32015-09-05

Reduce heat extraction from the second stage and increase vacuum level

Reply #42015-09-05

Increase the feed temperature and vacuum level, and appropriately reduce heat removal in the intermediate section.

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Entrapment problem

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