| 排气管直径与深度对水力喷射空气旋流器传质性能的影响 |
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| 引用本文： | 程治良,徐飞,全学军,邱发成,代明星.排气管直径与深度对水力喷射空气旋流器传质性能的影响[J].化工学报,2015,66(5):1642-1648. |
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| 作者姓名： | 程治良 徐飞 全学军 邱发成 代明星 |
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| 作者单位： | 重庆理工大学化学化工学院, 重庆 400054 |
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| 基金项目： | 国家自然科学基金项目(21176273)；重庆理工大学基金项目(2014ZD04，2014XH16)。@@@@supported by the National Natural Science Foundation of China，the Research Project of Chongqing University of Technology |
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| 摘 要： | 对水力喷射空气旋流器(WSA)的中心排气管直径De和排气管插入深度S进行了设计优化研究,实验考察了不同De和S对WSA脱氨传质系数KLa和气相压降的影响,提出了综合评价传质过程效率的概念——单位压降传质效率pη,讨论了De和S的设计取值。研究表明,当De增大时,KLa和气相压降均随之降低,较小De的WSA具有较高的气液传质性能,但气相压降比较大,而KLa和气相压降均随S增大而增大。综合能效关系表明,随着De的增大Pη增大,随着S的增大Pη出现先增大后降低的趋势,WSA设计中De与WSA直径D之比De/D宜为0.42~0.53,S与WSA筒体长度H之比S/H适宜取值约为0.70。
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| 关 键 词： | 脱氨 空气旋流器 废水 传质 气液两相流 |
| 收稿时间： | 2014-11-03 |
| 修稿时间： | 2015-02-05 |
Effect of diameter and length of vortex finder in water-sparged aerocyclone reactor on its mass transfer performance in air stripping of ammonia |
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| CHENG Zhiliang,XU Fei,QUAN Xuejun,QIU Facheng,DAI Mingxing.Effect of diameter and length of vortex finder in water-sparged aerocyclone reactor on its mass transfer performance in air stripping of ammonia[J].Journal of Chemical Industry and Engineering(China),2015,66(5):1642-1648. |
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| Authors: | CHENG Zhiliang XU Fei QUAN Xuejun QIU Facheng DAI Mingxing |
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| Affiliation: | School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China |
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| Abstract: | Water-sparged aerocyclone (WSA) is a new gas-liquid mass transfer equipment, which takes the advantage of coupling effect of air cyclone and liquid jet fields. In order to improve its mass transfer performance and establish design principles, the effect of diameter (De) and length (S) of the vortex finder in the WSA on its mass transfer performance and air pressure drop in air stripping of ammonia was investigated and optimized. A new concept, mass transfer efficiency per gas pressure drop, ηp, and its calculation equation were put forward. The WSA with smaller De and longer S showed higher mass transfer efficiency than that with larger De and shorter S in air stripping of ammonia. However, this kind of WSA had higher air pressure drop, which would consume more energy. Calculation of ηp, which was a comprehensive indicator considering energy consumption and mass transfer efficiency, showed that it increased with the increase of De/D and S/H,but it deceased a little when S/H increased from 0.71 to 0.93. The optimal De/D and S/H should be 0.43 to 0.53 and 0.70, respectively. These results could be used as a guide for the design of WSA with good mass transfer performance. |
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| Keywords: | ammonia removal aerocyclone wastewater mass transfer gas-liquid flow |
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