The cleaning of scraper arms inside a prill tower is a great safety concern in Urea Plant as it is a high risk activity with potential severe consequences. Several accidents have occurred during the manual chipping of Urea deposition on scrapper arms all over the World. Entering the scraper floor is dangerous even with all safety protections like steel or wooden movable structures as well as personnel protective equipment (PPE). Urea lumps can fall with high velocity due to the height and even small lumps can cause severe injuries to the personnel working inside. Some industries are using movable steel structures under which workers carry out cleaning. Sometimes moving the steel canopy inside the scraper floor is an issue. At Nagarjuna Fertilizers and Chemicals Limited (NFCL), India, scraper arms are cleaned without entering into prill tower scraper floor area. This paper provides insight into how Nagarjuna Fertilizers and Chemicals Limited (NFCL), India has achieved both improved Safety and Reliability by implementing these modifications..
This paper was presented during the 2016 AICHE Ammonia Safety Conference in Denver.