(17f) Overview of C3 Splitter Revamp - an Analysis of Background, Design Strategy, Execution, and Operation

Saudi Kayan (SK) has been operating a mixed feed cracker since July 2010 with a capacity of 1.35 MTPA. Initially, the plant was configured to produce more ethylene instead of propylene. However, market requirements dictate that the plant produces more propylene products after a few years of operation. Subsequently, SK changed the feedstock and increased capacity to meet the new business case of enhancing propylene production. SK utilized the existing C3 Splitter trays and heat pump compressor configuration to handle the new operating case and to minimize investment.

However, the first attempt to increase the feed capacity was met with a severe loss of propylene in the bottom product. Then SK decided to troubleshoot the plant by increasing the heat pump compressor capacity to the maximum extent.

Since the troubleshooting didn’t achieve the target requirements, SK approached Sulzer to study the column and propose a revamp. SK also evaluated the process scheme of the revamp and its impact on auxiliary equipment and then planned the shutdown for the tray replacement. The paper will discuss the background, overall scheme, design, installation, and operation of this C3 Splitter column.