Clean-Air Technology

Reduction of contaminants and the recovery of residues from waste incineration

High-resolution combustion chamber spectroscopy has been tested in a pilot plant in order to clarify findings to the effect that NOx formation in waste incineration plants is influenced by combustion control and the geometry of the combustion chamber. This “ORFEUS” system has proven its value as a diagnostic tool for combustion chamber analysis. 

 

Zusammenfassung

The implementation of immission control regulations for waste incineration plants in the form of “end of the pipe” solutions, e.g. by the installation of additional flue gas scrubbing units, has substantially increased the cost of thermal waste treatment. On the other hand, the NOx reduction potential of primary side technologies, which are applied directly to the combustion process, has yet to be fully exploited.

Investigations conducted in the TAMARA waste incineration plant have shown that NOx formation is hugely influenced by combustion control (reverse flow, main stream or parallel flow operation) and by the geometry of the combustion chamber. This project involved the conduct of further investigations using a newly-developed system of high-resolution combustion chamber spectroscopy in order to improve the understanding and description of NOx formation mechanisms, and to provide a basis for the definition of options for intervention.

 

Results:

  • The ORFEUS system has proved its value as a diagnostic tool for combustion chamber analysis. This system has been used for the definition of the following:
  • temperature fields,
  • time- and site-related fluctuations in flame intensity
  • localised flame intensities and variations in the latter over time.
  • Dynamic variations in temperature fields, e.g. associated with localised variations in the calorific value of fuel or variations in the quantity of combustion air, can be represented at intervals ranging from 12 to 300 seconds.
  • A CCD detector with enhanced quanta efficiency in the UV range has proved to be the most suitable instrument for the recording of band emissions.

More Project Information

Project title: Application of new measuring and analysis technologies for the reduction of contaminants and the recovery of residues from waste incineration

Project number: 01ZF9506/7

Project period: 1995 - 1998

Project region: Germany (Baden-Württemberg)

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Source: German National Library of Science and Technology Hannover (TIB)