新型旋流传质元件的流体力学性能实验优化
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摘要
针对一种新型旋流传质元件的溢流管高度和壳体上液相出口位置、面积及数量进行了流体力学性能优化实验研究。在直径500 mm的有机玻璃塔内,以空气-水为实验物系对具有不同壳体结构的传质元件进行了流体力学性能实验。在相同的液相负荷时,实验测定了不同气相负荷条件下传质元件的湿板压降、漏液率及雾沫夹带率。实验结果揭示了元件壳体上不同的液相出口位置和出口面积等参数以及不同的溢流管高度对湿板压降、漏液和雾沫夹带的影响规律。结果表明:当传质元件的溢流管底端距离盲板50 mm,壳体上液相出口位置距离叶片30 mm,液相出口数量为2、总面积为1. 88×10~4mm~2时的传质元件性能最优。
An experimental optimization of hydrodynamic performance for a new type mass transfer cell was studied in terms of the height of the overflow pipe and the position,number and area of the liquid outlet on the shell. The hydrodynamic tests were carried out using an air-water system in a column constructed by polymethyl methacrylate with diameter of 500 mm. Under the same liquid loading condition,the wet plate pressure drop,the weeping rate and the entrainment rate were measured for mass transfer cell with different structural parameters at different gas loading conditions. The experimental results show the laws of the wet plate pressure drop,the weeping rate and the entrainment rate when the structure of the mass transfer cell is different. The performance of final cell structure is the best when the distance between the bottom of overflow pipe and blind plate is 50 mm,the distance between the liquid outlet and the blades is 30 mm,the number of liquid phase outlets is 2,and the liquid outlets area is 1. 88 ×10~4 mm~2 on the shell.
An experimental optimization of hydrodynamic performance for a new type mass transfer cell was studied in terms of the height of the overflow pipe and the position,number and area of the liquid outlet on the shell. The hydrodynamic tests were carried out using an air-water system in a column constructed by polymethyl methacrylate with diameter of 500 mm. Under the same liquid loading condition,the wet plate pressure drop,the weeping rate and the entrainment rate were measured for mass transfer cell with different structural parameters at different gas loading conditions. The experimental results show the laws of the wet plate pressure drop,the weeping rate and the entrainment rate when the structure of the mass transfer cell is different. The performance of final cell structure is the best when the distance between the bottom of overflow pipe and blind plate is 50 mm,the distance between the liquid outlet and the blades is 30 mm,the number of liquid phase outlets is 2,and the liquid outlets area is 1. 88 ×10~4 mm~2 on the shell.
引文
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[4]郭建荣.板式塔技术进展[J].煤化工,2003,31(5):48-51.
[5] PENCIAK J,NIEUWOUDT I,SPENCER G. High performance trays:getting the best capacity and efficiency[J]. IChem E,2006(152):311-315.
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[8] CHEN J,TAN T. Experimental and theoretical inves-tigation of gas flow field on a rotating stream tray[J].Chemical Engineering Communications,1998,168(1):243-257.
[9]李国文,史建福.高罩旋流塔板流体力学性能[J].环境工程,1996(2):28-34.
[10]孙文寿,吴忠标,李悦,等.旋流板塔钠强化石灰石湿式烟气脱硫研究[J].环境科学,2002(5):105-108.
[11]张龙,胡丞,高明,等. FST高效塔板性能研究[J].炼油技术与工程,2016,46(4):42-46.
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[13]张海龙.一种新型高效汽液传质元件的研究[D].天津:天津大学,2015.
[14]陈迓宾.新型离心分离式塔板的开发与流体力学性能研究[D].天津:天津大学,2016.