Effect of Higher Feed Preheat Temperatures |
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Case |
I |
II |
III |
||
200°F |
240°F |
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Item |
Base Case |
Feed |
Feed |
||
Flows, BPSD |
|||||
Feed |
6,174 |
6,174 |
6,174 |
||
Off Gas |
114 |
90 |
79 |
||
OH LPG |
1,513 |
1,653 |
1,729 |
||
Btm LSR |
4,547 |
4,431 |
4,366 |
||
Reflux |
1,664 |
2,779 |
5,226 |
||
Feed temp, °F |
157 |
200 |
240 |
||
Purities, LV% |
|||||
iC4 & nC4 in btm |
3.9 |
1.85 |
0.7 |
||
iC5 & nC5 in OH |
13.8 |
13.8 |
13.8 |
||
Duties, MMBTU/hr |
|||||
Feed preheat |
1.4 |
3.2 |
6.6 |
||
OH Condenser |
-4.3 |
-6.0 |
-9.5 |
||
Reboiler |
7.3 |
7.3 |
7.3 |
||
Approx. % of flood |
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Above feed |
31 |
45 |
81 |
||
Below feed |
81 |
85 |
85 |
||
LSR RVP |
12.1 |
11.1 |
10.5 |
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