Abstract: A digitally controlled three-dimensional gamma-scanning apparatus was developed and used to
troubleshoot distillation column in the present investigation. In a 140 mm (ID) model
column, various malfunctional phenomena, both rate and process related conditions and
structural problems, which may be frequently encountered in the operation of tray and
packing columns, were experimentally simulated and tested with the developed scanning
system. The experimental results showed that the scanning spectra can fairly reflect the
simulated phenomena.The salient feature of the scanning apparatus lies in that it
integrates the so called grid scan and computer-assisted tomography scan in a single
system. It was confirmed that the gamma-scanning technique can serve as an important on-
line troubleshooting and maintenance tool.

Key words: gamma ray scanning, distillation column, troubleshooting

摘要： A digitally controlled three-dimensional gamma-scanning apparatus was developed and used to
troubleshoot distillation column in the present investigation. In a 140 mm (ID) model
column, various malfunctional phenomena, both rate and process related conditions and
structural problems, which may be frequently encountered in the operation of tray and
packing columns, were experimentally simulated and tested with the developed scanning
system. The experimental results showed that the scanning spectra can fairly reflect the
simulated phenomena.The salient feature of the scanning apparatus lies in that it
integrates the so called grid scan and computer-assisted tomography scan in a single
system. It was confirmed that the gamma-scanning technique can serve as an important on-
line troubleshooting and maintenance tool.

关键词: gamma ray scanning;distillation column;troubleshooting