Measurement of SO<sub>2</sub> concentration in flue gas using ultraviolet LED

WANG Huashan; LI Xujia; LI Nan

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Measurement of SO₂ concentration in flue gas using ultraviolet LED

Thermal Power Generation Vol. 44, Issue 3, Pages: 48-52(2015)

更新时间：2025-09-28

- Measurement of SO₂ concentration in flue gas using ultraviolet LED
- 作者机构：
  
  燕山大学车辆与能源学院
- 作者简介：
- 基金信息：
- DOI：
  CLC： X831
- Published：2015
- 稿件说明：
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WANG Huashan, LI Xujia, LI Nan. Measurement of SO₂ concentration in flue gas using ultraviolet LED[J]. Thermal Power Generation, 2015, 44(3): 48-52.
DOI：

WANG Huashan, LI Xujia, LI Nan. Measurement of SO₂ concentration in flue gas using ultraviolet LED[J]. Thermal Power Generation, 2015, 44(3): 48-52. DOI：

摘要

采用LED作为探测光源

可以进一步降低SO2检测设备的成本

增加其使用寿命。以中心波长为300 nm的紫外LED为光源

基于SO2的吸收光谱特性

建立了光学吸收参量与SO2浓度之间的理论模型。试验表明

采用新的数据处理方法进行SO2气体浓度评价

可以显著降低光源及探测器电子噪声对测量结果的影响

当信噪比等于2时其检测限可达0.2μL/L

通过长时间的浓度测量验证了该检测方法的稳定性及精确性。

Abstract

On the basis of SO2 absorption spectroscopy

the monitoring technique for SO2 concentration around 300 nm using an ultraviolet light-emitting diode( LED) as the light source was developed. The theoretical relationship model between the SO2 concentrations and the optical parameters was established. The experimental results show that

using the novel data processing method to evaluate the SO2 concentration can reduce the influence of the detector electron noise and the light source on measurement significantly. The detection limit can reach 0. 2 μL / L when the signal noise ratio equals 2. Long-term detection of SO2 concentration was carried out to verify the stability and accuracy of this measurement technique. To sum up

using an ultraviolet light-emitting diode can reduce the cost and prolong the service life of sulfur dioxide monitoring.

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Measurement of SO2 concentration in flue gas using ultraviolet LED

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Measurement of SO₂ concentration in flue gas using ultraviolet LED