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Proceedings Paper

Optical measurement of the sodium concentration in the gas stream of a 1-MWth coal powder reactor at 1300oC and 13 bar
Author(s): Peter Kohns; R. Stoermann; W. Christmann; M. Foerster
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Paper Abstract

In practice, an upper limit of the temperature of the gas stream in thermal power plants arises from the corrosive effect of several contents which damage the turbine material, in particular sodium atoms. Thus the increase of the efficiency requires the on-line measurement of the sodium concentration. In order to install a protection of the turbines we carried out atomic absorption measurements of the sodium concentration in the gas stream of an experimental coal powder reactor with a thermal power of 1 MW. Pressure and temperature of the gas stream were 13 bar and 1300 degrees C, respectively. We found considerable fluctuation of the sodium concentration at a time scale of several seconds, especially when the operation conditions of the reactor were changed. The obtained temporal resolution was 0.3 sec. This value is sufficient to control the combustion process.

Paper Details

Date Published: 23 May 1997
PDF: 8 pages
Proc. SPIE 3108, Combustion Diagnostics, (23 May 1997); doi: 10.1117/12.274763
Show Author Affiliations
Peter Kohns, Optikzentrum NRW (Germany)
R. Stoermann, Optikzentrum NRW (Germany)
W. Christmann, Druckkohlenstaubfeuerung GbR (Germany)
M. Foerster, Druckkohlenstaubfeuerung GbR (Germany)

Published in SPIE Proceedings Vol. 3108:
Combustion Diagnostics
Maurus Tacke; Winfried Stricker, Editor(s)

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