600 MW燃煤锅炉能耗诊断分析

Energy Consumption Diagnostic Analysis for 600 MW Coal-fired Boiler

对某600 MW燃煤锅炉进行能耗诊断试验。通过对锅炉效率、空预器及烟道分段漏风、锅炉辅机耗电进行测试,对汽水温度及吸热量进行统计,对煤粉燃烧特性进行热重分析研究,得到机组能耗现状。结合试验结果深度分析能耗损失的主要原因有排烟温度高、飞灰含碳量大、辅机耗电率高、再热蒸汽温度低、锅炉漏风量大等。最后从运行优化调整、设备治理和技术改造等方面提出了节能降耗措施,预计可降低供电煤耗约6.78 g/kWh。

The energy consumption diagnostic test was carried out for a 600 MW coal-fired boiler.The boiler efficiency,air leakage of air preheater and flue section,power consumption of auxiliary boiler were tested,the temperature and heat absorption of steam were calculated,the combustion characteristics of coal were studied by thermogravimetric analyzer,which made the energy consumption status of this unit concluded.According to the test results,the main causes of energy loss were high exhaust temperature,high carbon content of fly ash,high power consumption rate of auxiliary engine,low reheat steam temperature and large air leakage of boiler.The measures of energy saving were put forward for the aspects of operation optimization adjustment,equipment management and technical transformation,which estimated that the coal consumption of power supply could be reduced by about 6.78 g/kWh.