Characterisation of the Combustion Performance of a Suite of Pulverised Coals. Report on the CC 1 Trials

摘要

Pulverized coal combustion equipment has been traditionally designed with very qualitative information about the coal used. However, changing coal supplies and the design of new burner systems have led to the need for more quantitative information. The most important processes in coal combustion are coal pyrolysis and the combustion of the resultant gases and solids. The rate of each of these processes must be known as well as the yield of pyrolysis products. Additionally, information about the effect of environmental factors on these rates and yields must be known. One blend and eight coals with ranks from Anthracite to Lignite were characterized using an isothermal plug-flow reactor (IPFR). The experiments were performed under simulated pulverized coal flame conditions so that the simple phenomenological models could be used to fit the data. The data from this study should be useful for a number of purposes, including the qualitative understanding of coal behavior in pulverized coal burners and the quantitative prediction of pulverized coal flames with detailed mathematical models. The IPFR analysis was shown to be an effective way of generating quantitative information about the characteristics of coal during pulverized coal combustion. The technique of simulating the environment encountered and using simple models was successful. Additionally, a significant amount of specific information about the coals studied was generated. Recommendations are given to improve the technique with the goal of creating a more simple, quick technique for accurate, quantitative data on coal combustion. 34 figs., 42 refs., 23 tabs. (ERA citation 14:014263)