基于COMSOL的充填料浆搅拌流场模拟研究
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摘要
充填料浆的搅拌质量对实现其良好的管道输送及保障充填体强度都至关重要。针对目前金属矿山充填工艺中使用较多的立式搅拌桶,以全尾砂高浓度充填料浆为研究体系,利用多物理场仿真软件COMSOL的CFD模块对料浆在搅拌桶内的混合状态进行了模拟研究,对比分析使用单层叶片式搅拌桨和双层叶片式搅拌桨时,不同数量挡板条件下搅拌桶内流场、流速及压力的分布特征。结果表明:对于全尾砂高浓度料浆的立式搅拌桶搅拌,双层叶片式搅拌桨的搅拌效率优于单层叶片式搅拌桨;搅拌桶内设置挡板,对提高单层叶片式搅拌桨的搅拌效率有一定作用,但对双层叶片式搅拌桨的搅拌效率的提高并不显著。
The mixing quality of the backfilling slurry is essential for achieving good pipe transportation and ensuring the strength of the filled body. In combination with the current vertical mixing tank used for backfilling process in metal mines, the high-concentration crude tailings backfilling slurry was used as the research system, and the mixing state of the slurry in the mixing tank was simulated and studied by using the CFD module of the multi-physics simulation software COMSOL. The distribution characteristics of flow field, flow velocity and pressure in the mixing tank under various numbers of the baffle while using single-layer blade-typed paddle and double-layer blade-typed paddle were compared and analyzed. The results showed: the mixing efficiency of the high-concentration crude tailings backfilling slurry in the vertical mixing tank by using the double-layer blade-typed paddle was higher than that by using the single-layer blade-typed paddle; the mounting of baffles contributed to the enhancement of the mixing efficiency by using the single-layer blade-typed paddle, while less contributed to that by using the double-layer blade-typed paddle.
The mixing quality of the backfilling slurry is essential for achieving good pipe transportation and ensuring the strength of the filled body. In combination with the current vertical mixing tank used for backfilling process in metal mines, the high-concentration crude tailings backfilling slurry was used as the research system, and the mixing state of the slurry in the mixing tank was simulated and studied by using the CFD module of the multi-physics simulation software COMSOL. The distribution characteristics of flow field, flow velocity and pressure in the mixing tank under various numbers of the baffle while using single-layer blade-typed paddle and double-layer blade-typed paddle were compared and analyzed. The results showed: the mixing efficiency of the high-concentration crude tailings backfilling slurry in the vertical mixing tank by using the double-layer blade-typed paddle was higher than that by using the single-layer blade-typed paddle; the mounting of baffles contributed to the enhancement of the mixing efficiency by using the single-layer blade-typed paddle, while less contributed to that by using the double-layer blade-typed paddle.
引文
[1]王旭东,张贤明,夏洪均.基于工业废油场的螺旋搅拌桨结构设计及性能研究[J].制造业自动化,2014(8):127-129.
[2]佟立军.机械搅拌槽挡板的研究[J].有色设备,2005(3):17-19.
[3]潘传九,葛文娜,陆晓峰.基于CFD的搅拌流场模拟及预测研究[J].中国测试,2012,38(6):13-16.
[4]葛春艳.基于PIV和CFD的搅拌桨设计和改进[D].杭州:浙江大学,2014:8-15.
[5]秦 青,张敏革,林兴华,等.新型双螺杆锚式桨的设计及搅拌流场模拟[J].沈阳理工大学学报,2016,35(1):77-84.
[6]吴德飞,毛 羽,周晓辉,等.搅拌槽内三维流场的CFX5数值模拟[J].石油化工设备,2003,32(2):22-24.
[7]魏新利,任 杰,王定标,等.搅拌反应器流场的数值模拟[J].郑州大学学报(工学版),2006,27(2):52-55.
[8]侯拴弟,张 政,王英琛,等.轴流桨搅拌槽三维流场数值模拟[J].化工学报,2000,51(1):70-76.
[9]朱向哲,苗 一,谢禹钧.双层涡轮搅拌桨三维流场数值模拟[J].石油化工设备,2005,34(4):26-29.
[10]张敏革.超高分子量HPAM溶液流变行为与双螺带螺杆桨搅拌流场研究[D].天津:天津大学,2009:66-73.
[2]佟立军.机械搅拌槽挡板的研究[J].有色设备,2005(3):17-19.
[3]潘传九,葛文娜,陆晓峰.基于CFD的搅拌流场模拟及预测研究[J].中国测试,2012,38(6):13-16.
[4]葛春艳.基于PIV和CFD的搅拌桨设计和改进[D].杭州:浙江大学,2014:8-15.
[5]秦 青,张敏革,林兴华,等.新型双螺杆锚式桨的设计及搅拌流场模拟[J].沈阳理工大学学报,2016,35(1):77-84.
[6]吴德飞,毛 羽,周晓辉,等.搅拌槽内三维流场的CFX5数值模拟[J].石油化工设备,2003,32(2):22-24.
[7]魏新利,任 杰,王定标,等.搅拌反应器流场的数值模拟[J].郑州大学学报(工学版),2006,27(2):52-55.
[8]侯拴弟,张 政,王英琛,等.轴流桨搅拌槽三维流场数值模拟[J].化工学报,2000,51(1):70-76.
[9]朱向哲,苗 一,谢禹钧.双层涡轮搅拌桨三维流场数值模拟[J].石油化工设备,2005,34(4):26-29.
[10]张敏革.超高分子量HPAM溶液流变行为与双螺带螺杆桨搅拌流场研究[D].天津:天津大学,2009:66-73.