聚氧乙烯型表面活性剂对无烟煤润湿的影响  

Effect of polyoxyethylene surfactant on wettability of anthracite

作　　者：寇凯博 严国超[2] 董金发 冯志忠 丁宏强 相海涛 KOU Kaibo;YAN Guochao;DONG Jinfa;FENG Zhizhong;DING Hongqiang;XIANG Haitao(College of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan 0300024,China;College of Ming Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Daliuta Coal Mine,National Energy Group Shendong Coal Group Co.,Ltd.,Shenmu 719315,China)

机构地区：[1]太原理工大学安全与应急管理工程学院,山西太原030024 [2]太原理工大学矿业工程学院,山西太原030024 [3]国家能源集团神东煤炭集团有限公司大柳塔煤矿,陕西神木719315

出　　处：《煤矿安全》2022年第10期248-256,共9页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51974195)。

摘　　要：为了探究聚氧乙烯型表面活性剂对无烟煤润湿性影响,采用分子模拟和实验分析相结合的手段,运用Materials Studio软件微观解释表面活性剂对无烟煤的润湿机理;实验分析利用改良沉降法和喷雾降尘实验来比较添加表面活性剂后水对煤的吸附强度并获取表面活性剂的最佳质量分数,并得出除尘效率。结果表明:表面活性剂在无烟煤表面定向排布;NP-10和AEO-9的环氧乙烷的氧原子是更容易发生吸附作用的活性位点;聚氧乙烯型表面活性剂使煤与水之间静电力和氢键作用提升,分子间作用力增强;在改良沉降法中,表面活性剂使煤尘的沉降速率提升,亲水性增强,测得AEO-9和NP-10的最佳质量分数分别为0.4%和0.8%,AEO-9对煤润湿性高于NP-10;在喷雾降尘实验中,供水压强增大,水滴速率增大,除尘效率提高。In order to explore the influence of polyoxyethylene surfactant on the wettability of anthracite,Materials Studio software was used to explain the wettability mechanism of surfactant on anthracite by means of molecular simulation and experimental analysis.The improved sedimentation method and spray dust removal experiment were used to compare the adsorption strength of water on coal after adding surfactants and obtain the optimal concentration of surfactants,and obtain the dust removal efficiency.The results show that surfactants are oriented on the surface of anthracite.The oxygen atoms of ethylene oxide of NP-10 and AEO-9 are the active sites for adsorption more easily.Polyoxyethylene surfactants enhance the electrostatic and hydrogen bond between coal and water,and enhance the intermolecular force.In the modified sedimentation method,the surfactant increases the sedimentation rate and hydrophilicity of coal dust,and the optimal concentrations of AEO-9 and NP-10 are 0.4%and 0.8%,respectively.The wettability of AEO-9 on coal is higher than that of NP-10.In the spray dust removal experiment,the water supply pressure increases,the water drop rate increases,and the dust removal efficiency increases.

关 键 词：无烟煤 NP-10 AEO-9 分子模拟 改良沉降法 喷雾降尘实验 润湿性 

分 类 号：TD712[矿业工程—矿井通风与安全]