Analysis of ammonium sulfate circulation tank failure - possible causes and their remediation

摘要

In June 1996, the volume of two of the sulfate solution tanks in the ammonia removal plant were increased by two different pressure events. The first tank was damaged by pressure that was not relieved due to a plugged vent line. The second tank was damaged by a pressure event generated during the process of making ammonium sulfate. This paper will discuss the cause of the second tank's failure, and the design solution to restart the operation of the plant.