130t/h循环流化床飞灰残炭炉设计与运行  

Design and Operation of a 130 t/h Fly Ash Residual Carbon CFB Boiler

作　　者：黄乐平 宋国良[2] 杨召 牛玉奇 HUANG Le-ping;SONG Guo-liang;YANG Zhao;NIU Yu-qi(Jimincare(Gaoan)Clean Energy Co.,Ltd.,Yichun,China,Post Code:330812;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing,China,Post Code:100190)

机构地区：[1]济民可信(高安)清洁能源有限公司,江西宜春330812 [2]中国科学院工程热物理研究所,北京100190

出　　处：《热能动力工程》2023年第3期112-118,共7页Journal of Engineering for Thermal Energy and Power

摘　　要：煤气化工艺产生的气化残炭挥发分极低,固定碳含量高,水分几乎为零,常规燃烧技术难以利用,利用循环流化床实现气化残炭高效洁净燃烧是一种有效途径。针对中国科学院工程热物理研究的残炭燃烧技术建立的130 t/h气化残炭循环流化床锅炉开展性能测试,通过考察沿炉膛高度方向的温度分布和变化规律、旋风分离器差压、残炭炉的燃烧效率以及NO_(x)原始排放数据分析了残炭炉的运行特性。结果表明:130 t/h飞灰残炭炉在床温超过850℃时可实现气化残炭稳定燃烧,整个底部床面进行预热燃料,在二次风的分级配风下直接燃烧,床温分布均匀,燃烧效率可达97%以上;一次风当量比为0.3的条件下,残炭炉可稳定运行,负荷80%以上尾部烟道飞灰含碳量低于6%;残炭炉运行中炉内NO的转化率较低,NO_(x)原始排放小于100 mg/m~3。Due to the extremely low volatile content of gasification residual carbon,high fixed carbon content and almost zero moisture produced in the coal gasification process,it is difficult to utilize conventional combustion technology in this process.Therefore,efficient incineration through a circulating fluidized bed(CFB) is an effective way to realize efficient and clean combustion of gasification residual carbon.The performance of 130 t/h fly ash residual carbon boiler established by the residual carbon combustion technology of engineering thermophysics research of Chinese Academy of Sciences is tested.The operating characteristics of the residual carbon boileris analyzed by investigating the temperature distribution and change rule along the furnace height direction,the differential pressure of cyclone separator,the combustion efficiency of the residual carbon boiler and the original NO_x emission data.The results show that the gasification residual carbon can be stably burned in 130 t/h fly ash residual carbon boiler when the bed temperature exceeds 850 ℃.The whole bottom bed surface is preheated and the fuel is directly burned under the graded distribution of secondary air.The bed temperature distribution is uniform and the combustion efficiency can reach more than 97%.When the primary air equivalent ratio is 0.3,the residual carbon boiler can operate stably.The carbon content of fly ash in tail flue is lower than 6% under the boiler load is more than 80%.The conversion rate of NO in the residual boiler is lower during operation,and the original NO_x emission is less than 100 mg/m~3.

关 键 词：气化残炭 残炭炉 预热燃烧 燃烧效率 一次风当量比 

分 类 号：TQ536[化学工程—煤化学工程]