Lessons learned from ammonia industry incidents

摘要

Ammonia plant no. 1 (USA) was built by MW Kellogg and commissioned in 1968 with a nameplate capacity of 907 t/d and has been modified in several stages to its current capacity of over 1,361 t/d. The facility had a routine turnaround planned for the summer of 2014 to perform scheduled maintenance, conduct required inspections, and replace catalysts. During this shutdown, the plant replaced catalysts in the desulphurisation system, high temperature shift (HTS) reactor and low temperature shift (LTS) main reactor. The LTS catalyst required a reduction step before being placed into service. The plant did not replace the catalyst in the primary reformer, which had been in service for three years.