1. School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding,
Hebei 071003, China
2. HuaDian Electric Power Research Institute Co. Ltd, Hangzhou, Zhejiang 310030, China
Abstract The on-line measurement of SO3 is studied based on ultraviolet absorption spectroscopy, and SO3 gas generation system is built. In order to improve the detection accuracy, various interference factors in the measurement process are removed. The characteristic absorption bands of SO3 and SO2 overlap seriously, and the influence of SO2 on SO3 measurement can be removed to the greatest extent through reasonable selection of characteristic absorption bands and spectral inversion strategy. In the study, the standard curve method combined with single wavelength method, dual wavelength method and integral spectrum method is used to establish the standard curve. The results show that the measurement error of the integrated spectrum method is the smallest, and it can be preferentially applied to the on-line spectrometric analysis of SO3 emission.
ZHENG Hai-ming,ZHU Xiao-peng,WANG Jin-xiu, et al. Experimental Study on On-line Measurement of SO3 by Ultraviolet Absorption Spectroscopy[J]. Acta Metrologica Sinica, 2021, 42(8): 1076-1080.
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2021, Vol. 42 
