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Retrofitting of Crude Oil Pre-heat Train in a Crude Oil Refinery
Industry: Crude Oil Refining
Challenge
This project consists of retrofitting of Crude Oil Preheat Train in a crude oil refinery. As a result, the crude oil preheat temperature (when entering to Furnace) was increased from 230 C to 251 C and 18% energy saving was realized.
- 1. Splitting of crude oil stream into three branches upstream of desalter unit and splitting of crude oil stream into two branches downstream of exiting desalter unit and before entering to flash drum and after exiting from flash drum and before entering to distillation column.
2. Addition of five identical shells in series to E154 heat exchanger and one identical shell in series to E107 heat exchanger and two identical shells in series to E156 heat exchanger.
3. Addition of three new heat exchanger A, B and C to the network according to final network design grid.
4. Changing 6 shells in series (exchanger E159A-F) to three parallel units (2 shells in series each).
5. Changing 4 shells in series (exchanger E158A-D) to two parallel units (2 shells in series each).
6. Changing inlet and outlet temperatures as well as hot and cold stream flow rates, in order to increase the network efficiency.
7. Elimination of coolers E162 and E173.
8. Varying stream pressure drop associated with some hot streams to promote their hydraulic performance.
Proposed Solution
Results
Energy Saving
(%)
OPEX Saving
($/yr)
Investment
($)
Payback Period (month)
18.45
698,105
1,583,200
27
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