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Visualization and control of gas analysis at Shazand Petrochemical's steam-generating plant in Iran

June 23, 2016 | Reliance SCADA

In 2015, Delta Gas Mobin Group implemented a system for the monitoring and control of infrared gas analyzers at the Iranian company Shazand Petrochemical. A gas analyzer can simultaneously measure the following gas components: carbon monoxide, carbon dioxide, nitric oxide, sulfur dioxide, oxygen.



Control system

To visualize and control the gas analysis process, the Reliance SCADA/HMI system and a WAGO PLC are used.


The Reliance SCADA system provides the following functionality:


  • Modification of operational parameters and settings, such as alarm and deviation limits
  • Graphical-oriented operator screens displaying important measuring data–related information from the gas analyzers
  • Data transparency towards the operators
  • Operating feedback from the gas analyzers
  • Generating custody transfer reports and other reports (daily/monthly reports); they are stored on the hard disk
  • Archiving of reports, alarms/events, and trends
  • Secure environment by protecting the system from unauthorized access
  • Alarm management; alarms are derived from primary input signals as well as from calculated figures, they can be printed on the alarm printer, and are stored on the hard disk; in addition, alarm messages as well as their acknowledgements are reported
  • Real-time and historical trending for all major signals in the system
  • Monitoring of all important signals with high and low limits; generating an alarm if any of the signals are out of the normal range
  • Human–machine interface with which the operator can monitor, for example, all live values, calculated values, alarm/event messages, parameters, and settings in a number of graphical displays
  • Monitoring of gas flow and the status of the gas components
  • Gas-analyzer online checking (any alarms are detected immediately)
  • Monitoring of raw–calculated values comparison


Examples of visualization windows



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Delta Gas Mobin Group

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