SUPERFRAC® Trays - Project Report - Koch-Glitsch - #1

I KOCH GLITSCH

Project Report #117

vapor pressure (RVP). The propylene splitter capacity was limited by the required product purity specifications.

Customer: Lindsev Oil Refinery

Both columns WWE invaded when the FCCU was constructed in 1981. The depropanizer column takes a feed of mixed LPG from a Merox treating unit. The overhead propylene / propane product, typi­cally 75-80% propylene, is routed via molecular sieve dryers to the propylene splitter for production of 95% pure propylene for sale.

Trie depropanizer was built with 40 two-pass sieve trays with a liquid feed to tray 24. The top section has 23 trays and a diameter of 1700mm. The bottom section has 17 trays and a diameter of 2200mm.

The propylene splitter consists of one main spiitter column built in two sections, followed by treating and drying sections. The 2204mm diameter column was originally constructed with 150 convenuonai two-pass sieve trays-

Tower Names: FCCU Depropanizer, Propylene Splitter

Depropanizer: 1 7 DOmm/2200mm Propylene Splitter: 2204mm

Depropanizer: 40 sieve trays Propylene Splitter: 150 sieve trays

Problem: Due to a capacity-increasing revamp of the Fluidized Catalytic Cracking Unit (FCCU), Lindsey Oil's depropanizer column was unable to handle increased feed rates while maintaining required Reid

- I KOCH GLITSCH -