Podcast
Questions and Answers
What is the pressure of the condensate in the Butene Stripper Reboiler?
What is the pressure of the condensate in the Butene Stripper Reboiler?
60 psig
Where does the stripped vapor from the Butene Stripper exit to?
Where does the stripped vapor from the Butene Stripper exit to?
It exits to T-380 (Debutenizer) at tray 33.
What happens to the entrained water in the Butene Coalescer?
What happens to the entrained water in the Butene Coalescer?
It drops into the containment boot and is routed to D-353 (Waste Water Degassing Drum).
What is the role of E-382 (Butene Product Cooler)?
What is the role of E-382 (Butene Product Cooler)?
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Where is the C4 vapor routed after leaving the Butene Coalescer?
Where is the C4 vapor routed after leaving the Butene Coalescer?
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What three streams are combined and routed to T-380 (Debutenizer)?
What three streams are combined and routed to T-380 (Debutenizer)?
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How is the vapor exiting T-380 (Debutenizer) cooled?
How is the vapor exiting T-380 (Debutenizer) cooled?
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What happens to the entrained water in the process?
What happens to the entrained water in the process?
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Where does the liquid sidedraw from tray 32 of T-380 (Debutenizer) go?
Where does the liquid sidedraw from tray 32 of T-380 (Debutenizer) go?
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What type of steam is used to heat the vapor in the Debutenizer Feed Heater (E-383)?
What type of steam is used to heat the vapor in the Debutenizer Feed Heater (E-383)?
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Study Notes
Process Overview
- Deethenizer liquid bottoms from E-375 and overhead purge from T-411, combined with off-spec C4 from P-381, are directed to T-380 (Debutenizer) entry at tray 23.
- Liquid hydrocarbons from D-350 (Water Wash Settler) flow to F-383A/B (Debutenizer Filters) before reaching D-383A/B (Debutenizer Feed Coalescers).
- Entrained water is collected in a containment boot and routed to D-353 (Waste Water Degassing Drum).
Vapor Processing
- Vapor exits D-383A/B and enters the shell side of E-386A/B (Debutenizer Feed-bottoms Exchangers), heated by T-380 bottoms from E-385.
- The vapor then moves to the shell side of E-383 (Debutenizer Feed Heater) and is heated using 100 psig steam.
- The heated vapor is introduced into T-380 (Debutenizer) at tray 15.
T-380 (Debutenizer) Operations
- Overhead vapor from T-380 is cooled in E-380 (Debutenizer Condenser) using cooling water and collected in D-380 (Debutenizer Reflux Drum).
- Liquid from D-380 is pumped back into T-380 via P-380A/B at tray 35, with any entrained water routed to the Waste Water Header.
- Overhead vapor exits D-380, moving to D-360 (Booster Cylinder Suction Drum) before entering C-360A/B (Booster/Recycle Compressors).
Butene Stripping Process
- T-380 liquid sidedraw from tray 32 goes to T-381 (Butene Stripper) to produce a butene product stream, with further details covered later.
- T-381 features an internal reboiler E-381, utilizing 60 psig condensate for heating.
- Stripped vapor from T-381 returns to T-380 at tray 33.
Cooling and Waste Management
- The liquid bottom from T-381 is sent to the shell side of E-382 (Butene Product Cooler) for cooling.
- Cooled liquid is directed to D-382 (Butene Coalescer), where entrained water is collected in the containment boot and sent to D-353.
Final Product and Disposal
- D-382 overhead vapor proceeds to the bottoms of D-384A/B (Butene Driers) and exits from the top.
- C4 vapor is transferred to Unit 1191 for external storage, located outside of battery limits.
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Description
Test your knowledge on the debutenizer process flow involving various equipment including E-375, T-411, and P-381. Explore the routing and processing of different hydrocarbon streams and the functions of key components in this chemical engineering setup. Improve your understanding of the integration between purification and separation units in a refinery.
