Process tomography : seeing is believing

TLDR: In this article, the authors use tomography for real-time cross-sectional images of conditions inside process equipment, allowing operators to see what`s going on in such opaque regions as packed catalyst beds, multiphase solutions, powder mixers, and fluidized beds.

Abstract: As the chemical process industries try new ways to optimize their processes, they are taking a closer look at tomography. Already well established in medical diagnostics, the technique has found some CPI applications but has long been considered too expensive and impractical for routine use. Promising to change this perception are recent developments in tomographic sensors, image processing algorithms, as well as data processing. Of particular interest to the CPI is tomography`s ability t provide real-time cross sectional images of conditions inside process equipment, allowing operators to see what`s going on in such opaque regions as packed catalyst beds, multiphase solutions, powder mixers, and fluidized beds. The images contain a wealth of data that can be used to: design equipment, verify simulation models and calculations derived via computational fluid dynamics, monitor fluid flow and environmental conditions, and image velocity profiles. One interesting application is as a way of inspecting radioactive waste drums to decide where they should be sent for permanent storage. Another use being studied is the monitoring of air sparging of contaminated areas.