Stability of the 13C column separation in industrial mode of operation
Based on the original cryogenic column conceived and built by National Institute for Research and Development of Isotopic and Molecular Technologies Cluj-Napoca, it is necessary to implement control algorithms for the industrial mode of operation of this equipment, in order to produce some chemical compounds with higher concentration in (13C), compounds asked in various domains. The present work deals with column efficiency analysis and stability in industrial mode of operation.
Observer based safe operation of the 13C cryogenic separation column
The cryogenic 13C separation process is very slow, the concentration of this isotope reaches the desired value during weeks. A lot of variables, essential for the separation process must be controlled, so that any malfunction can compromise the whole production. The most important information about the system state is given by the carbon monoxide level sensor, with disastrous consequences by its failure (conductor breaking, power line failure, etc.). The authors try to solve this problem using an observer which generates the observed level information and compare, in normal mode of operation, the observed value with the real, measured variable. By sensor failure, the expected difference will increase drastically and the control system will switch to the observed level information.
Diagnose flooding columns efficiently
Using field pressure data, a refiner made a low-capital modification on a crude distillation column to increase throughput without a shutdown