Patent ID: 11666857

Abstract:
A still/stahl column includes a still section, a primary stahl section, the primary stahl section positioned beneath the still section, and a polishing stahl section, the polishing stahl section positioned beneath the primary stahl section. A process also includes feeding a water rich glycol still feed stream to the still section and feeding a stripping gas feed stream to the polishing still section. The process includes withdrawing a reboiler draw stream from the still section and heating the reboiler draw stream in a reboiler to form a reboiler inlet stream. The process includes injecting the reboiler inlet stream into the primary stahl section, stripping water from the water rich glycol with the stripping gas, and withdrawing a still stripping gas stream from a top portion of the still section. A lean glycol polishing discharge stream is withdrawn from a bottom portion of the polishing stahl section.