135MW循环流化床锅炉的经济运行分析  

Economic Operation Analysis of 135 MW Circulating Fluidized Bed Boiler

作　　者：郑生斌 苗锐 ZHENG Sheng-bin;MIAO Rui(Shanxi International Energy Co.,Ltd.,Lingshi 031300,China;China Coal Datong Energy Co.,Ltd.,Datong 037001,China)

机构地区：[1]山西国际能源有限责任公司,山西灵石031300 [2]中煤大同能源有限责任公司,山西大同037001

出　　处：《电力学报》2021年第6期587-593,共7页Journal of Electric Power

摘　　要：循环流化床(CFB)技术是目前我国应用范围较广的洁净煤燃烧技术之一,在实际生产中CFB锅炉存在磨损严重、厂用电率偏高、机组效率偏低、飞灰可燃物含量(以下简称“飞灰含碳量”)偏高和污染物排放不达标等问题亟待解决。以中煤大同能源有限公司2×135 MW CFB锅炉为实例展开论述,仔细分析了该公司锅炉基本情况、入炉煤煤质和锅炉运行情况;提出了实现燃烧优化调整可采取的措施,包括低床压、低烟气含氧量、高炉膛压力、优化煤粒粒径级配措施等4项主要措施,此外,需根据煤质情况进行燃烧方式的调整。通过实施所提的4项措施,降低了该135 MW CFB锅炉的飞灰含碳量、炉渣可燃物含量(以下简称“炉渣含碳量”),在污染物达标排放的基础上,提高了锅炉运行的经济效益。Circulating fluidized bed(CFB)technology is currently one of the most widely used clean coal com⁃bustion technologies in my country.In actual production,CFB boilers suffer from severe wear,high plant pow⁃er consumption,low unit efficiency,high unburned combustible in fly ash(hereinafter referred to as“unburned carbon in flyash”),and substandard emissions of pollutants need to be resolved urgently.Taking the 2×135 MW CFB boiler of China Coal Datong Energy Co.,Ltd.,as an example,the basic situation of the company’s boiler,the quality of coal into the furnace and the operation of the boiler were carefully analyzed;Proposed mea⁃sures that could be taken to achieve combustion optimization and adjustment,including four main measures in⁃cluding low bed pressure,low flue gas oxygen content,blast furnace pressure and optimized coal particle size grading measures.In addition,the combustion method needs to be adjusted according to the coal quality.Through the implementation of the 4 proposed measures,the unburned carbon in flyash and unburned combusti⁃ble in slag(hereinafter referred to as“unburned carbon in slag”)of the 135 MW CFB boiler were reduced.On the basis of pollutant emission standards,the economic benefits of boiler operation were improved.

关 键 词：循环流化床(CFB)锅炉 燃烧优化调整 飞灰可燃物含量 炉渣可燃物含量 二次风量 

分 类 号：TM619[电气工程—电力系统及自动化]