Improvement of Condensing Duty by changing our existing Fin Fan blade angle in Petrochemical Industry
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REVAMPING PROJECT BPCL’s Mumbai RFU has undergone a major revamp in September 2021 to increase the design capacity from 3600 MTPD to 6000 MTPD. On 6th November 2021, RFU started processing 6000 MTPD of feed from CDU 3 stabilized naphtha and CDU4 stabilized naphtha. |
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CHALLENGE However it was observed that when RFU Splitter 2 was operating at design throughput the column overhead air fin condenser 60-EA-104 A-H was giving only 6 MMkcal/hr of condensing duty as against the design of 12.4 MMkcal/hr. RFU splitter 2 column was also under frequent flaring mode. |
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SOLUTION Encon instructed BPCL to change all its air fin condenser fan blade angle from the existing 7 degrees to 18 degrees installed in October 2019. |
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IMPROVEMENTS IN PARAMETRS The following improvements were observed in RFU splitter 2 column post change in fan blade angles of 60-EA-104 A-H. |
PARAMETERS |
BEFORE | AFTER |
| Blade Angle |
7 degrees | 18 degrees |
| RFU Splitter 2 Flaring | Frequent | Occasional |
| RFU Splitter 2 Reflux Flow | 1650 MTPD | 1900 MTPD |
| RFU Splitter 2 Top Yield NHT ISOM | 400 MTPD | 800 MTPD |
| Condensing Duty | 6 MMKcal/hr | 7 MMKcal/hr |