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差分光学吸收光谱法在线监测烟气中SO2浓度的非线性补偿研究

Nonlinear compensation of in-situ monitoring SO2 concentration in flue gas by DOAS

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摘要

差分光学吸收光谱法(DOAS)应用于固定污染源烟气排放监测时,烟气中污染气体SO2浓度较高将产生非线性吸收问题。提出了一种非线性补偿方法,即将实际浓度所对应的气体分压与反演结果所对应的气体分压之比与反演结果之间的对应关系拟合成补偿函数,利用此补偿函数对反演结果进行非线性补偿。实验结果表明:该补偿方法能较好地减低高浓度气体非线性吸收产生的影响,可提高气体浓度反演精度。

Abstract

Nonlinear absorption occurs when the differential optical absorption spectroscopy (DOAS) is used to monitor the flue gas with high SO2 concentration from fixed pollution source.A nonlinear compensation method is put forward,in which the ratio of the pressure component of the actual concentration to the pressure component of the inverted result versus the inversed result is fitted into a compensation function. The compensation function is used to compensate the inverted result nonlinearly. Experimental results show that the effect caused by the nonlinear absorption of high-concentration gas can be reduced with the proposed method and it can improve the inversion accuracy of gas concentration.

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中图分类号:O433.5+1;TN206

所属栏目:光电工程

基金项目:国家自然科学基金资助项目(50576010)

收稿日期:2008-05-19

修改稿日期:2008-09-16

网络出版日期:0001-01-01

作者单位    点击查看

陆剑敏:东南大学 能源与环境学院,江苏 南京 210096
邵理堂:东南大学 能源与环境学院,江苏 南京 210096
汤光华:东南大学 能源与环境学院,江苏 南京 210096
王式民:东南大学 能源与环境学院,江苏 南京 210096

联系人作者:王式民(smwang@seu.edu.cn)

备注:陆剑敏|女|工程师|主要从事流动测试技术方面的研究工作|(1963-)

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引用该论文

LU Jian-min,SHAO Li-tang,TANG Guang-hua,WANG Shi-min. Nonlinear compensation of in-situ monitoring SO2 concentration in flue gas by DOAS[J]. Journal of Applied Optics, 2008, 29(6): 0859

陆剑敏,邵理堂,汤光华,王式民. 差分光学吸收光谱法在线监测烟气中SO2浓度的非线性补偿研究[J]. 应用光学, 2008, 29(6): 0859

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