循环流化床油页岩半焦燃烧优化运行技术分析  

Technical analysis of optimal operation of combustion of oil shale semi-coke in circulating fluidized bed

作　　者：孔皓 张缦[1] 苗苗[1] 邓博宇 刘贤东 黄逸群 杨海瑞[1] 吕俊复[1] KONG Hao;ZHANG Man;MIAO Miao;DENG Boyu;LIU Xiandong;HUANG Yiqun;YANG Hairui;Lü Junfu(State Key Laboratory of Power Systems,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学能源与动力工程系,电力系统及发电设备控制和仿真国家重点实验室,北京100084

出　　处：《中南大学学报（自然科学版）》2021年第1期1-7,共7页Journal of Central South University:Science and Technology

基　　金：国家重点基础研究发展规划(973计划)项目(2014CB744300);国家自然科学基金资助项目(U1810126);华能集团总部科技项目基础能源科技研究专项(HNKJ20-H50)。

摘　　要：针对目前油页岩生产页岩油时生成的副产物半焦难以处理的问题,在3.3 MWth循环流化床中试实验装置上分别进行油页岩、油页岩和半焦混合、半焦的燃烧实验研究。考察给料粒度、二次风份额和一二次风温对炉膛温度分布、污染物排放浓度、底渣与飞灰含碳量的影响。研究结果表明:油页岩和半焦混烧时,随着半焦的混烧比例增加,炉膛内温度整体下降,NOx排放量升高,SO2排放量下降;全半焦燃烧时,床温显著降低但炉膛温度分布仍然均匀,优化给料粒度、提高一二次风温可以显著提高炉膛内的燃烧温度;增加二次风份额可以降低NOx的排放。In view of the problem that the by-product semi-coke produced by oil shale in the production of shale oil is difficult to handle,the experimental study about the combustion of oil shale,mixture of oil shale and semicoke,and semicoke was conducted on a pilot-scale 3.3 MWth circulating fluidized bed(CFB)experimental device.The effects of the feed particle size,the secondary air share and the temperature of the primary and secondary air on furnace temperature distribution,pollutant emission concentration,carbon content of bottom ash and fly ash were analyzed.The results show that when oil shale and semi-coke are mixed burning,as the proportion of semicoke increases,the furnace temperature decreases,the NOx emission value increases and the SO2 emission value decreases.When full semicoke is burning,the bed temperature significantly reduces but the furnace temperature distribution is still uniform,and optimizing the feed particle size or increasing the temperature of the primary and secondary air can significantly increase the combustion temperature in the furnace.Increasing the secondary air share results in the decrease in NOx emissions.

关 键 词：油页岩 油页岩半焦 半焦燃烧 中试燃烧实验 

分 类 号：TK16[动力工程及工程热物理—热能工程]