发电技术 ›› 2024, Vol. 45 ›› Issue (4): 633-640.DOI: 10.12096/j.2096-4528.pgt.22169

• 发电及环境保护 • 上一篇    下一篇

高水分褐煤流动性实验研究

季恩昌1, 杨冬2, 孙佰仲2   

  1. 1.国能宝清煤电化有限公司,黑龙江省 双鸭山市 155600
    2.东北电力大学;能源与动力工程学院,吉林省 吉林市 132000
  • 收稿日期:2023-05-26 修回日期:2023-08-15 出版日期:2024-08-31 发布日期:2024-08-27
  • 通讯作者: 孙佰仲
  • 作者简介:季恩昌(1986),男,工程师,主要从事电厂集控运行工作,519643858@qq.com
    杨冬(1997),男,硕士研究生,主要研究方向为生物质炭的制备;
    孙佰仲(1973),男,博士,教授,主要研究方向为生物质类废弃物热转化技术的理论与应用,本文通信作者,sunbaizhong@126.com
  • 基金资助:
    吉林省科技科技厅重点科技攻关项目(20210101072JC)

Experimental Study on Fluidity of High Moisture Lignite

Enchang JI1, Dong YANG2, Baizhong SUN2   

  1. 1.Guoneng Baoqing Coal and Electric Chemical Co. , LTD. , Shuangyashan 155600, Heilongjiang Province, China
    2.School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132000, Jilin Province, China
  • Received:2023-05-26 Revised:2023-08-15 Published:2024-08-31 Online:2024-08-27
  • Contact: Baizhong SUN
  • Supported by:
    Key Scientific and Technological Research Program of the Department of Science and Technology of Jilin Province(20210101072JC)

摘要:

目的 研究原煤中水分、粒径以及煤仓材质对原煤流动性的影响,找出造成原煤仓堵煤的主要原因。 方法 设计并搭建了原煤流动性实验装置,对不同水分、粒径的原煤进行流动性实验,并绘制流动特性图,得到各要素对原煤流动性的影响。 结果 原煤水分越大,流动特性图折线越靠右,下落质量越少,流动性越差,完全下落所需的旋转角度越大;煤下落的初始位置不同是由于不同粒径之间的静摩擦力不同导致其安息角不同。水分降低会使得摩擦力减小,下落质量增大;聚四氟乙烯材质的流动性折线位置靠前,底部摩擦系数小,同样角度下落质量更多,流动性增强。 结论 水分在原煤流动性中起关键作用,粒径对原煤流动性的影响微弱,粒径只有与水分共同作用才会对其流动性产生较大影响。材质对原煤流动性的影响也较大,但在水分偏低时可忽略其影响。

关键词: 燃煤发电, 高水分褐煤, 原煤流动性, 堵煤, 水分, 粒径

Abstract:

[Objecttives] The influence of moisture in raw coal, particle size and coal bunker material on the fluidity of raw coal was studied to find out the main reasons for coal clogging in raw coal bunkers. Methods A raw coal flowability experimental device was designed and built to conduct flowability experiments on raw coal with different moisture and particle sizes, and flow characteristics diagrams were drew to obtain the effects of various factors on raw coal flowability. Results The greater the moisture in the raw coal, the more right the broken line in the flow characteristic diagram is, the less the falling mass, the worse the mobility, and the greater the rotation angle required for complete falling.The difference in the initial position of coal falling is due to the difference in static friction between different particle sizes, resulting in different repose angles. At the same time, the decrease in moisture will reduce the friction force and increase the falling mass. The liquidity bend line of polytetrafluoroethylene material is located at the front, and the friction coefficient at the bottom is small. At the same angle, the mass drops more and the mobility is enhanced. Conclusions Moisture plays a key role in the fluidity of raw coal, the influence of particle size on the fluidity of raw coal is weak, and only the interaction with moisture can have a great influence on the fluidity of raw coal. Material also has a greater impact on the fluidity of raw coal, but when the moisture is low, the impact can be ignored.

Key words: coal-fired power, high-moisture lignite, raw coal fluidity, coal blockage, moisture, particle size

中图分类号: