What are the main factors considered when deciding whether to include a stripping tower in a vacuum distillation column?
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Seeing that some have it and some don’t, is it due to the product type? Thank you.
It mainly depends on the properties of the logistics, such as volatility, boiling point, and whether side reactions will occur, etc
Vacuum distillation is primarily due to the properties of the mixture
A stripping tower is provided in the lubricating oil vacuum distillation column, but not in the fuel-type vacuum distillation column.
It mainly relates to the requirements for the quality of the side stream; if the downstream equipment has high demands on the side stream products, a stripping tower is necessary, otherwise it isn’t
Classified by type and depending on the company’s focus, the oils used for pressure reduction are actually all waxes; they are eventually combined and fed into the catalytic process. No matter how carefully they are separated, they end up mixed together, so a stripping tower is not necessary. Companies that focus on producing lubricating products, on the other hand, need a stripping tower. You can refer to atmospheric pressure system gas towers: diesel fuel comes from the first and second stages, while waxes come from the third stage, etc.