Development of an Evaluation Method of Pulverized Coal Combustion Utilizing Emission Intensity of Potassium Spectroscopic Analysis

Abstract

We examined the use of spectroscopic analysis as a method of evaluation of the situation of the pulverized coal combustion. The results of the basic combustion flame test using a butane gas burner and the basic test apparatus, we found the possibility that the combustion process of the pulverized coal was able to be understood from the luminescence spectrum of potassium of ash in the pulverized coal.
The combustibility of various lances was evaluated with the basic test apparatus and a real blast furnace. As for oxy-coal lance and double lance, it has been understood that combustibility improves it under the low excess air ratio from the spectroscopic analysis. However, it is influenced from the injected gas volume about oxy-coal lance.
There is theoretically a possibility that the temperature can be presumed from the half-width of the luminescence spectrum. The correlation of the half-width and the temperature was able to be confirmed from the experimental data. However, it is necessary to develop the experiment technique to presume an actual temperature because resolution of spectroscope is low.