褐煤粒径对电厂烟气吸附特性的影响研究  

Research on the Influence of Brown Coal Particle Sizeon the Adsorption Characteristics of Power Plant Flue Gas

作　　者：廖鹏 段中川 LIAO Peng;DUAN Zhongchuan(College of Resources and Environmental Engineering,Lanzhou Petrochemical University of Vocational Technology,Lanzhou 730060,China)

机构地区：[1]兰州石化职业技术大学资源环境工程学院,甘肃兰州730060

出　　处：《兰州石化职业技术大学学报》2025年第1期11-16,共6页Journal of Lanzhou Petrochemical University of Vocational Technology

摘　　要：采用大南湖矿褐煤为研究对象,通过磁悬浮重量法分别对CH_4、CO_(2)以及N_2开展等温吸附试验,对吸附实验数据拟合及处理,探讨了煤样粒度及气体种类对吸附特性的影响,建立了吸附效果与粒径之间的相关关系。结果表明:不同粒径煤样的等温吸附曲线表现出相似的规律,粒径与吸附量整体上呈现无规则变化趋势,但煤样粒径与吸附平衡时间成正比;煤样存在极限粒度范围(80~20目),在此范围内,煤样粒径与吸附量、吸附常数a值成反比,这与不同粒径煤样孔隙结构和比表面积有关,而小于极限粒径后随着粒径减小吸附量不变或变化不大;不同气体下同一粒径煤样的等温吸附曲线表现出相似的规律,但3种气体的吸附量顺序表现为CO_(2)>CH_4>N_2,且与常压下吸附平衡时间长短顺序变化一致,说明了CO_(2)吸附性能最强,CH_4次之,N_2最小。This article uses brown coal from the Dananhu Mine as the research object,and conducts isothermal adsorption experiments on CH_(4),CO _(2),and N_(2) using the magnetic levitation weight method.The adsorption experimental data is fitted and processed,and the influence of coal particle size and gas type on adsorption characteristics is deeply explored.The correlation between adsorption effect and particle size is established.The results show that the isothermal adsorption curves of coal samples with different particle sizes exhibit similar patterns,with an overall irregular trend in particle size and adsorption capacity.However,the particle size of coal samples is directly proportional to the adsorption equilibrium time;Coal samples have a limit particle size range(80-20 mesh),within which the particle size of the coal sample is inversely proportional to the adsorption capacity and adsorption constant a value,which is related to the pore structure and specific surface area of coal samples with different particle sizes.However,when the particle size is smaller than the limit,the adsorption capacity remains unchanged or does not change much as the particle size decreases;The isotherm adsorption curves of coal samples with the same particle size under different gases exhibit similar patterns,but the order of adsorption capacity for the three gases is CO_(2)>CH_(4)>N_(2),which is consistent with the order of adsorption equilibrium time under normal pressure.This indicates that CO_(2) adsorption performance is the strongest,followed by CH_(4) and N_(2).

关 键 词：褐煤 烟气 吸附特性 粒度 

分 类 号：TM621.2[电气工程—电力系统及自动化]