Wang, Zhenzhen Xi’an Jiaotong University|Tokushima University
Liu, Renwei Tokushima University|Xi’an Jiaotong University
Tanaka, Seiya Tokushima University
Tainaka, Kazuki The Central Research Institute of Electric Power Industry
Tanno, Kenji The Central Research Institute of Electric Power Industry
Watanabe, Hiroaki Kyushu University
Yan, Junjie Xi’an Jiaotong University|Tokushima University
Liu, Jiping Xi’an Jiaotong University
laser-induced plasma processes
two-stage cyclone measurement system
Fly ash contents can be considered as a basis for optimal and stable boiler combustion control and fly ash quality control in power plant, especially the unburned carbon in fly ash. The real-time and quantitative measurement of contents in fly ash was studied using a constructed two-stage cyclone measurement system and detected using laser-induced breakdown spectroscopy(LIBS) technique. The surrounding gas effect, such as CO2 effect on unburned carbon content, was studied comprehensively in this paper. The CO2 effect was eliminated using this proposed combination method of two-stage cyclone measurement system and LIBS with 1ns pulse-width laser according to the efficient gas-particle separation and the controlled laser-induced plasma processes of particle flow. The quantitative analysis was improved using the plasma temperature correction method with the intensity ratio of the emission pair from magnesium as a plasma temperature indicator. The measurement of unburned carbon content in fly ash with temperature correction method presented the concordant results analyzed by chemical analysis method. It is demonstrated the feasibility and improved detection ability for the real-time measurement of fly ash contents in power plant.
Energy & Fuels
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Energy & Fuels, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.energyfuels.9b01161.