Inventing The
Rockwell Automation
Software Continuous Emissions Monitoring System
Accurately and Affordably Measuring Large-Source Emissions
The Software Continuous Emissions Monitoring (CEM®) system is a patented, model-based predictive emissions monitoring system that provides a cost-effective alternative to hardware-based monitoring systems. Software CEM® combines powerful process analytics with real-time sensor validation to provide predictive emissions values with unsurpassed accuracy.
The Technology
Introduced in 1992 and approved by the U.S. Environmental Protection Agency, Software CEM® was the first software-based predictive emissions monitoring system and is recognized by regulatory agencies worldwide as a solution that meets compliance requirements. The Software CEM® system can be used in a range of different unit operations including boilers, gas turbines, reciprocating engines, heaters, and regenerative and conventional thermal oxidizers. With more than 350 installations worldwide in its 22-year history, each requiring yearly certification, Software CEM® has achieved a track record of 100 percent compliance.
Software CEM® uses the Pavilion8 Model Analytic Engine to provide highly accurate measurements of nitrogen oxides, carbon dioxide and other emissions. The Software CEM® system continuously monitors emissions by means of an online model using historical and real-time source data from existing plant sensors. This dynamic system predicts emissions even in the extreme operating ranges of the unit by considering the combustion source and how pollutants are generated. In addition, the built-in sensor validation system detects and compensates for failed or drifting sensors — resulting in higher uptime, rapid reconstruction of bad sensor values and early detection of improper unit operation.
The Benefits
- Improved environmental performance: Highly accurate and reliable emissions and compliance information increases operational confidence and can help maintain emissions levels within limited parameters.
- Increased efficiency: Emissions monitoring can help maximize the efficiency of burner operation.
- Cost savings: Software CEM® results in lower installation and operating costs with higher reliability than hardware-based solutions.
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