Analysis of alky unit DIB exposes design, operating considerations
- Stratus Engineering Inc., Houston, TX (United States)
- Chavez Consulting Inc., Dallas, TX (United States)
A recent examination of an alkylation plant deisobutanizer (DIB) illustrates design and operating considerations that should be addressed when capacity increases and efficiency improvements are desired. This sulfuric acid alkylation plant had excess feed and reaction zone capacity. The DIB was the limiting factor; specifically, the DIB reboiler duty was at its maximum and the reboiler steam-supply valves were wide open. A new alkylate Rvp specification of 5.0 psia also was constraining operation. An engineering review suggested minor design modifications and maintenance items which, when implemented, increased alkylate production capacity by more than 25%. The paper discusses DIB operation, reboiler review, superheated steam supply, fouling, improvements, and revised operation.
- OSTI ID:
- 377876
- Journal Information:
- Oil and Gas Journal, Vol. 94, Issue 40; Other Information: PBD: 30 Sep 1996
- Country of Publication:
- United States
- Language:
- English
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