To clean up amine, the rate of particulate generation must be slowed and the iron sulfide already in the amine filtered out. Reducing corrosion rates is the way to do this.
In one Midwestern refinery, the amine solution was thick with iron sulfide. Within two weeks, the solution was restored to a light gray by constant filtering, maximum reclaimer operation (see following section), and use of a corrosion inhibitor. Twenty-five percent MEA was being circulated. A high molecular weight film-forming amine corrosion inhibitor was slugged into the regenerator reboiler inlet. Corrosion rates, as monitored by a probe on the reboiler outlet, fell from 50 mil/yr to 3 mil/yr.
Categories: Process Troubleshooting | Tags: Corrosion | Leave a comment