Shell & Plate Heat Exhanger Replaces BAHX, Improving Uptime And Throughput As Demethanizer Low Side Heater
A large natural gas processing facility using a brazed aluminum heat exchanger as the low side heater (LSH) on the demethanizer column experienced loss of pressure integrity resulting in leakage on three occasions over 10 years. Each event required repair or replacement of the unit attended by extensive costly downtime. Failure was attributed to a combination of thermal shock, thermal cycling and hydraulic shock.
In an effort to reduce repair costs and downtime, plant management installed a Tranter WPHE for the LSH duty, which fit well within footprint of brazed aluminum unit with minimal disruption of pipework. The Tranter WPHE has performed without damage over several years through incidents that damaged the brazed aluminum units. Tower controllability has improved, along with a capacity increase of 5.3%. Plant management has concluded that the WPHE stainless steel, design and welded construction withstand thermal and hydraulic stresses better than the brazed aluminum HE.
Download the complete case history here.This Tranter Welded Plate Heat Exchanger replaced a continuously failing BAHX unit, sucessfully withstanding thermal shock, thermal cycling and hydraulic shock as a demethanizer low side heater.