Abstract
NDIR method is one of the important sulfur dioxide concentration measurement methods. The original and the transmission light intensity on the sulfur dioxide attached on the protection windows is attenuated because of the soot absorption and scattering and the received light intensity of the sulfur dioxide characteristic absorption wavelength is deviated from the theoretical absorption light intensity, so the sulfur dioxide concentration measurement result is error. The protection window soot pollution interference caused by the multidispersion soot is discussed in this paper. The numerical simulation results based on the Mie theory show that the sulfur dioxide concentration measurement result is related to the multidispersion soot average diameter, soot diameter distribution and soot dissipativity. The solution method of the windows pollution soot interference is brought out and sulfur dioxide concentration measurement accuracy can be improved.
Published Version
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