Patent Number: 6,332,336

Title: Method and apparatus for maximizing the productivity of a natural gas liquids production plant

Abstract: An objective in a natural gas liquids (NGL) plant is that of achieving and maintaining maximum productivity. If this plant is equipped with a turboexpander that drives a gas compressor (recompressor), maximum turboexpander productivity provides maximum plant productivity attained by maximum compressor power. This is accomplished by manipulating the compressor operating point location (by adjusting the opening of the antisurge valve) and by controlling rotational speed. The subjects of the proposed invention are the method and apparatus (comprising a turboexpander/recompressor rotational speed controller and a recompressor antisurge controller) providing maximum turboexpander/recompressor rotational speed and recompressor operating point location (corresponding to maximum power) by opening the turboexpander's adjustable nozzles and the recompressor antisurge valve.

Inventors: Mirsky; Saul (West Des Moines, IA), Zilberman; Boris (West Des Moines, IA)

Assignee: Compressor Controls Corporation

International Classification: F01D 15/08 (20060101); F01D 15/00 (20060101); F02C 1/02 (20060101); F02C 1/00 (20060101); F25J 3/02 (20060101); F25J 001/00 ()

Expiration Date: 12/25/2018