Gamma scanning for troubleshooting, optimisation and predictive maintenance of distillation columns in petroleum refineries and chemical plants

Gamma-ray scanning is a non-intrusive technique to examine inner details of a distillation column, while it is in operation. It provides essential data to optimise the performance of columns, extend column run times, track the performance deteriorating effects of fouling and solids deposition, and identify maintenance requirements well in advance of scheduled turnarounds. The technology has been successfully used for on-line investigation of various types of distillation columns in petroleum refineries, gas processing installations and chemical plants in the country and the region. This paper outlines the basic principle of the technology and describes the inspection procedures, and in addition, a few case studies are presented. (Author)