
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
[ "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。" ]
收稿日期:2023-05-26,
修回日期:2023-08-15,
纸质出版日期:2024-08-31
移动端阅览
季恩昌,杨冬,孙佰仲.高水分褐煤流动性实验研究[J].发电技术,2024,45(04):633-640.
JI Enchang,YANG Dong,SUN Baizhong.Experimental Study on Fluidity of High Moisture Lignite[J].Power Generation Technology,2024,45(04):633-640.
季恩昌,杨冬,孙佰仲.高水分褐煤流动性实验研究[J].发电技术,2024,45(04):633-640. DOI: 10.12096/j.2096-4528.pgt.22169.
JI Enchang,YANG Dong,SUN Baizhong.Experimental Study on Fluidity of High Moisture Lignite[J].Power Generation Technology,2024,45(04):633-640. DOI: 10.12096/j.2096-4528.pgt.22169.
目的
2
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
2
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
2
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
2
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。
[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
2
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
2
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
2
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.
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