Discussion on whether the thermal light fraction tank and the thermal light fraction gas air cooler can be eliminated in the hydrogenation process
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The hot high-boiling-point oil is fed into the hot low-boiling-point separation tank; the gas at the top of this tank is cooled by air cooling before being sent to the cold low-boiling-point tank. The gas at the top of the cold low-boiling-point tank and the liquid at its bottom are both sent to the stripper downstream, and the hot low-boiling-point oil is also sent to that stripper. Since both gas and oil end up in the stripper, can the hot low-boiling-point tank and the air cooler for that gas be eliminated? Could the hot high-boiling-point oil be sent directly to the stripper after being depressurized? Everyone is welcome to discuss
Once the high-heat scores and low-heat scores are removed, the corresponding process can also be eliminated.
Depending on the properties of the crude oil, cold high-cut and cold low-cut processes can be employed!
Thermal light ends are used for further separation; if there are no thermal light ends nor cold light ends, will the gas-phase load on the subsequent stripping towers be too high?
This post was last edited by YilianYoumeng2856 on January 1, 2018, at 16:16. It’s quite unnecessary to cool the hot low-pressure gas; this includes the subsequent cold low-pressure separator as well. Why not simply feed both the hot low-pressure oil and hot low-pressure gas into the stripper? There’s no need to cool them first and then exchange heat before sending them into the tower – doing so would result in a significant loss of heat.
Yes, both options are feasible; it depends on the trade-offs between energy recovery and investment
The device has a low processing capacity, so the gas-phase load will not be high
It’s theoretically feasible! This is related to the overall process; by eliminating the thermal low-pressure section, it’s as if the buffer tank feeding the stripping tower has been removed
By retaining high-temperature fractions and discarding low-temperature ones, the high-temperature fraction oils go straight to the stripping tower. Have you considered what would happen if high pressure were to penetrate into the low-pressure area – the stripping tower wouldn’t be able to withstand it, and its trays could even be destroyed.
That makes sense. Thank you for the reminder! There is a possibility of that