Table 1.
Effect of split ratio for the lean oil: A-base case; B-future mode. Deethanizer and debutanizer theoretical stages are 25 and 10, respectively.
| A (base case) | Split ratio |
|||||||
|---|---|---|---|---|---|---|---|---|
| 0.9 | 0.8 | 0.7 | 0.6 | 0.5 | 0.4 | 0.3 | 0.25 | |
| Recycle flow (ton/day) | 6912 | 2851 | 1840 | 1201 | 795 | 512 | 337 | 315 |
| Bottom pressure of deethanizer (MPa) | 0.15 | 0.2 | 0.25 | 0.35 | 0.45 | 0.55 | 0.85 | 0.85 |
| Bottom pressure of debutanizer (MPa) | 0.45 | 0.45 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.7 |
| Bottom temperature of (deethanizer/debutanizer) (oC) | 67/127 | 70/127 | 72/127 | 82/127 | 89/127 | 95/127 | 116/128 | 114/130 |
| Total duty for deethanizer and debutanizer (MMKcal/h) | 18.75 | 10 | 7.7 | 6.3 | 5.4 | 4.67 | 4.4 | 5.6 |
| CAPEX/OPEX | Higher/Higher | Higher/Lower | Higher/Lower | Higher/Lower | Higher/Lower | Higher/Lower | Lower/Lower | Lower/Higher |
| B (future mode) | Split Ratio |
|||||
|---|---|---|---|---|---|---|
| 0.9 | 0.8 | 0.7 | 0.6 | 0.5 | 0.4 | |
| Recycle flow (ton/day) | 4886 | 2150 | 1531 | 1064 | 820 | 809 |
| Bottom pressure of deethanizer (MPa) | 0.3 | 0.43 | 0.7 | 0.85 | 0.9 | 0.99 |
| Bottom pressure of debutanizer (MPa) | 0.5 | 0.5 | 0.55 | 0.6 | 0.8 | 0.85 |
| Bottom temperature of (deethanizer/debutanizer) (oC) | 89/140 | 90/140 | 110/140 | 114/140 | 111/150 | 125/155 |
| Total duty for deethanizer and debutanizer (MMKcal/h) | 14 | 9 | 7.5 | 6.2 | 9.7 | 9.61 |
| CAPEX/OPEX | Higher/Higher | Higher/Lower | Higher/Lower | Higher/Lower | Higher/Lower | Higher/Higher |