钻孔水力开采用气力提升装置模型的建立及实验研究  

Theoretical model and experimental research of airlift device in borehole hydraulic jet mining

作　　者：胡东[1] 唐川林[1] 张凤华[1] 杨林[2] 

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412008 [2]重庆交通大学机电与汽车工程学院,重庆400044

出　　处：《煤炭学报》2012年第3期522-527,共6页Journal of China Coal Society

基　　金：科技部国际科技合作资助项目(2008DFA70300);湖南工业大学自然科学研究资助项目(2011HZX10)

摘　　要：气力提升装置由于其效率过低而致使相关优点得不到充分发挥,限制了其应用范围。为进一步提高其对固体颗粒输送的能力,通过改进传统气举的结构,采用喷射器式气举来提高气举的气力提升性能。基于伯努利方程获得了对气力提升装置管内各相运动描述的理论模型。实验结果表明:喷射器式气举与传统气举特性曲线变化规律基本一致,理论模型与实测结果对比,其相对误差在7%以内,理论值与实测值吻合较好,且前者对提升效果的增强作用整体优于后者,尤以在较高气量值下最为显著;在γ=0.42和QG=8.8 m3/h处,前者最大排沙量为后者的2倍。The advantage of airlift device is not brought into fullest play due to the poor lifting efficiency,thus it＇s application scope in BHM is limited.In order to make further improvement on lifting solid particles,the law of jet airlift influence on lifting characteristic was studied through improvement on the design of traditional airlift.A theoretical model was proposed to describe each phase movement in lifting pipe based on Bernoulli equation.The results were found as follows：the performance curves evolution of jet airlift is similar to that of traditional airlift,the experimental value has a little error to the theory value with a deviation of 7%.The effect of jet airlift on improving lifting capacity is greater than the traditional airlift,especially for the medium air flow rates.The maximum mass flow of solid particles of the former is two times of the latter under the conditions of γ=0.42 and QG=8.8 m3/h.

关 键 词：气力提升装置 伯努利方程 喷射器式气举 

分 类 号：TD825.6[矿业工程—煤矿开采]