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中南大学学报(自然科学版)

Journal of Central South University

第52卷    第1期    总第317期    2021年1月

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文章编号:1672-7207(2021)01-0001-07
循环流化床油页岩半焦燃烧优化运行技术分析
孔皓,张缦,苗苗,邓博宇,刘贤东,黄逸群,杨海瑞,吕俊复

(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)

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。

 

关键词: 油页岩;油页岩半焦;半焦燃烧;中试燃烧实验

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

Abstract: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 semi-coke 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 semi-coke 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.

 

Key words: oil shale; oil shale semi-coke; semi-coke combustion; pilot test combustion experiment

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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