Optical measurement of the sodium concentration in the gas stream of a 1-MWth coal powder reactor at 1300oC and 13 bar

Peter Kohns; R. Stoermann; W. Christmann; M. Foerster

doi:10.1117/12.274763

23 May 1997 Optical measurement of the sodium concentration in the gas stream of a 1-MW_th coal powder reactor at 1300oC and 13 bar

Peter Kohns, R. Stoermann, W. Christmann, M. Foerster

Author Affiliations +

Proceedings Volume 3108, Combustion Diagnostics; (1997) https://doi.org/10.1117/12.274763
Event: Environmental Sensing III, 1997, Munich, Germany

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.

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Peter Kohns, R. Stoermann, W. Christmann, and M. Foerster "Optical measurement of the sodium concentration in the gas stream of a 1-MW_th coal powder reactor at 1300oC and 13 bar", Proc. SPIE 3108, Combustion Diagnostics, (23 May 1997); https://doi.org/10.1117/12.274763

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