A New Method for Determining Pulverized Coal Economic Fineness

作者:Huang Xiaobin*; Zhang Peichao; Liang Longfei
来源:3rd International Conference on Machinery Electronics and Control Engineering (ICMECE 2013), 2013-11-29 to 2013-11-30.
DOI:10.4028/www.scientific.net/AMM.441.1072

摘要

Coal blending technology is commonly used in coal-fired thermal power plant in recent years to ease cost pressures. But thermal power plants still use empirical formula to determine the economic fineness of pulverized coal. This approach cannot change economic fineness of pulverized coal based on the proportion of blending coal timely and accurately, resulting in increasing carbon content of fly-ash and reduced combustion efficiency of boiler. In this paper, a new method for determining pulverized coal economic fineness is proposed. Dry ash-free basis volatile, coal uniformity index, ignition temperature, proportion of blending coal are considered as parameters. According to the relationship between these parameters, the best coal fineness can be obtained in real-time. Influences of coal blending technology are reduced greatly and the accuracy of the economic fineness is improved.

全文