کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
585982 | 1453270 | 2015 | 8 صفحه PDF | دانلود رایگان |
• Pyrophoric deposits may be present between tray and coke layer.
• Coke renders pyrophoric iron water proof and provides combustible material.
• Chemical decontamination of internals not a panacea in coking service.
• Distillation column in coking service safe cleaning priorities may differ from those dictated by ease or speed.
• Visbreaker/coking service column cleaning priorities should be re-evaluated.
An unexpected ignition of pyrophoric iron sulphide deposits took place in the fractionator of a Visbreaker unit. The distillation column had been chemically decontaminated prior to the event. The investigation of the event leads to conclusions concerning chemical decontamination limitations in vessels in coking service. Based on the lessons learned from this case, a prioritization of manual vessel cleaning works in coking service is proposed.
Journal: Journal of Loss Prevention in the Process Industries - Volume 38, November 2015, Pages 268–275