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化工学报  2015 

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

DOI: 10.11949/j.issn.0438-1157.20141651, PP. 1642-1648

Keywords: 脱氨,空气旋流器,废水,传质,气液两相流

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Abstract:

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ηp,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ηp增大,随着S的增大ηp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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