Revamp, troubleshooting optimize NGL depropanizer operations

The operator of a high-pressure depropanizer removed the high-performance packing and installed high-capacity trays to improve operations and fractionation. The Michigan plant saved an estimated $350,000/year due to the revamp and subsequent troubleshooting.The high-pressure depropanizer, operating at 195 psig, was originally filled with a popular 1 in., high-performance random packing. At yearend 1998, the plant owner decided to revamp the tower due to poor operations. Fractionation and heat input per barrel of feed were deemed unacceptable.Operating data indicated the usefulness of revamping the tower with Superfrac trays, which took place in early 2000 over 9 days, blind-to-blind. The ...

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