紫外吸收光谱法在线测量SO<sub>3</sub>的实验研究

doi:10.3969/j.issn.1000-1158.2021.08.15

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摘要基于紫外吸收光谱法对SO₃的在线测量进行了实验研究,搭建了SO3气体发生系统。为提高检测精度,探究了去除测量过程中的各种干扰因素。SO₃与SO₂的特征吸收波段重叠严重,通过合理选择特征吸收波段和光谱反演策略最大程度地去除SO₂对SO₃测量的影响。研究中采用标准曲线法结合单波长法、双波长法和积分光谱法建立了标准曲线。结果表明:积分光谱法的测量误差最小,可优先应用于SO3排放的在线光谱计量分析。

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	郑海明
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	王金袖
	贾桂红

关键词 ：计量学, SO₃体积分数, 在线测量, 紫外吸收光谱, 双波长法, 积分光谱法

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.

Key words： metrology SO₃ volume fraction on-line measurement ultraviolet absorption spectroscopy dual-wavelength method integral spectral method

收稿日期: 2019-12-27 发布日期: 2021-08-20

PACS:

TB99

基金资助:国家重点研发计划(2016YFB0600701);国家自然科学基金(11174078);河北省自然科学基金(E2019502089);中央高校基本科研业务费专项资金(2017MS145)

作者简介: 郑海明(1972- ),男,江西乐安人,华北电力大学教授,博士,主要从事工业固定污染源的烟气烟尘连续在线监测、光机电技术应用等方面的研究。Email: haimingzheng@163.com

引用本文:

郑海明,朱小朋,王金袖,贾桂红. 紫外吸收光谱法在线测量SO₃的实验研究[J]. 计量学报, 2021, 42(8): 1076-1080.
ZHENG Hai-ming,ZHU Xiao-peng,WANG Jin-xiu,JIA Gui-hong. Experimental Study on On-line Measurement of SO₃ by Ultraviolet Absorption Spectroscopy. Acta Metrologica Sinica, 2021, 42(8): 1076-1080.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2021.08.15 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2021/V42/I8/1076

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