Improvement on Quantitative Measurement of Fly Ash Contents Using Laser-Induced Breakdown Spectroscopy

• 作者: Hiroaki Watanabe Jiping Liu Junjie Yan Ryoichi Kurose Yoshihiro Deguchi Zhenzhen Wang
• 来源期刊: 流量控制、测量及可视化(英文)
• 学科: 医学
• 关键词: LASER-INDUCED BREAKDOWN SPECTROSCOPY FLY ASH Temperature CORRECTION CO2 Effect
• 年，卷（期）: 2015,（1）
• 页码范围: 10-21
• 页数: 12页
• 分类号: R73

摘要

Contents of fly ash are important factors for the operation of coal-fired plants. Real-time monitoring of coal and fly ash such as unburned carbon in fly ash can be an indicator of the combustion conditions. Because of the strong signal intensity and the relative simplicity of the LIBS (Laser- Induced Breakdown Spectroscopy) technique, LIBS can be applicable for real-time composition measurement of coal and fly ash. This research presented here focused on the clarification of the effects of plasma temperature and coexisting materials on quantitative measurement of fly ash contents. Quantitative capability of LIBS was improved using the proposed plasma temperature correction method. The CO2 effect was also discussed to accurately evaluate unburned carbon in fly ash in exhausts. Using the results shown in this study, quantitative measurement of fly ash contents has been improved for wider applications of LIBS to practical fields.