煤质变化对煤粉锅炉运行的影响因素及对策分析

Influence factors and countermeasures analysis of coal quality change on pulverized coal boiler operation

煤质变化影响燃煤锅炉的日常运行,结合高效煤粉锅炉的现场实际应用,从煤的水分较高易增加锅炉的耗电量、挥发分过高易引发煤粉自燃、煤质波动对制粉系统的影响、煤质对其它辅助设备运行的影响等方面分析了煤质变化对煤粉锅炉经济运行效率的影响,建议采取妥善配煤工作、加强燃料管理、设置煤质在线检测装置、控制入炉煤的煤质指标等对策以优化煤炭采购环节,最终达到降低煤粉锅炉运行成本之目的。

The change of coal quality affects the daily operation of coal-fired boilers,combined with the practical application of high-efficiency pulverized coal boilers,and from aspects such as：firstly,it is easy to increase the power consumption of the boiler from the higher moisture content of the coal,secondly,high volatility would cause spontaneous combustion of pulverized coal,thirdly,the effect of coal quality fluctuation on milling system,and then,the effect of coal quality on the operation of other coal-fired boilers,the effect of coal quality change on economic operation efficiency of pulverized coal boiler was analyzed,it is recommended to adopt proper coal blending,strengthen fuel management,and set coal quality on-line inspection devices,measures such as controlling the coal quality index of coal were done,to optimize the procurement of coal,therefore,the goal of reducing the operating costs of the pulverized coal boiler could be achieved finally.