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TDLAS直接吸收法测量CO2的基线选择方法

Selection of baseline method in TDLAS direct absorption CO2 measurement

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摘要

本文基于可调谐半导体激光吸收谱线(TDLAS)技术的直接吸收测量,选用中心工作波长为1 580 nm的DFB激光器,在室温及大气常压条件下检测了模拟烟气中的CO2浓度; 采用去峰拟合法和纯N2线拟合法获得基线后反算出了CO2的浓度,并将反算结果进行了对比。结果表明: 采用纯N2线拟合法反算出的浓度的最大相对误差为2.64%,均方值为1.69%; 采用去拟合法反算出的浓度的最大相对误差为9.81%,均方值为7.81%。以纯N2吸收谱线作基线的纯N2线拟合方法反算出的浓度的准确度较高,可以为CO2浓度测量的基线选择提供参考。

Abstract

Based on the direct absorption measurement of absorption spectrum of tunable diode laser absorption spectroscopy (TDLAS) technology, the DFB laser of 1 580 nm center wavelength is chosen to detect the concentration of CO2 in simulated flue gas at room temperature and atmospheric pressure. The concentration of CO2 is computed by removing absorption peak fitting method and pure N2 line fitting method, and the two computed results are compared. The results show that the maximum relative error of concentration is 2.64% for the pure N2 line fitting method, and the mean square value is 1.69%; the maximum relative error of concentration got from the removing absorption peak fitting method is 9.81%, and the mean-square value is 7.81%. Using the method of pure N2 line fitting method, the accuracy of concentration is greatly improved, so the method can provide baseline selection reference for CO2 measurement.

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中图分类号:O443.1

DOI:10.3788/co.20171004. 0455

所属栏目:光谱学和光谱仪器

基金项目:广东省质量技术监督局科技计划项目(No.2016ZT01); “广东特支计划”科技青年拔尖人才资助项目(No.2014TQ01N334); 广州市珠江科技新星专项(No.2014J2200054)

收稿日期:2017-02-21

修改稿日期:2017-03-31

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朱晓睿:华南理工大学 电力学院,广东 广州 510640广东省能源高效清洁利用重点实验室,广东 广州 510640
卢伟业:广东省特种设备检测研究院 顺德检测院,广东 佛山 528300
饶雨舟:华南理工大学 电力学院,广东 广州 510640广东省能源高效清洁利用重点实验室,广东 广州 510640
李越胜:广东省特种设备检测研究院 顺德检测院,广东 佛山 528300
卢志民:华南理工大学 电力学院,广东 广州 510640广东省能源高效清洁利用重点实验室,广东 广州 510640
姚顺春:华南理工大学 电力学院,广东 广州 510640广东省能源高效清洁利用重点实验室,广东 广州 510640

联系人作者:朱晓睿(1241997882@qq.com)

备注:朱晓睿(1993-),男,广东湛江人,硕士研究生,主要从事TDLAS技术监测气体方面的研究。

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引用该论文

ZHU Xiao-rui,LU Wei-ye,RAO Yu-zhou,LI Yue-sheng,LU Zhi-min,YAO Shun-chun. Selection of baseline method in TDLAS direct absorption CO2 measurement[J]. Chinese Optics, 2017, 10(4): 455-461

朱晓睿,卢伟业,饶雨舟,李越胜,卢志民,姚顺春. TDLAS直接吸收法测量CO2的基线选择方法[J]. 中国光学, 2017, 10(4): 455-461

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