振动规整填料萃取塔的性能测定.pdf

石油化
2010年第39卷第期
PETROCHEMICAL TECHNOLOGY
61
振动规整填料萃取塔的性能测定
吴少敏,胡雪沁,侯贵军,刘春江
(化学工程联合国家重点实验室天津大学化工学院,天津300072
摘要】釆用磷酸三丁酯一煤油一醋酸一水物系测试了振动规整填料萃取塔的传质性能。考察了规整填料的安装方式、连续相和
分散相流速对分散相存留分数和传质效率的影响。实验结果表明,在不分段、分段I(盘问距50mm)和分段T(盘间距100mm
这3种规整填料安装方式中,综合考虑分散相存留分数和传质效率,分段⊥比较具有优势;当两相流速都较小时,振动规整填料萃
动板萃取塔平均低18%左有。
取塔的分散相存留分数比振动筛板萃取塔平均高30%左右;在相同的操作条件下,振动规整填料萃取塔的表观传质单元高度比振
关键词]振动规整填料萃取塔;液液萃取;规整填料;分散相存留分数;表观传质单元高度
[文章编号]1000-8144(2010)01-001-05[中图分类号1TQ053.5[文献标识码]A
Performance Measurement of
Reciprocating Structured Packing Extraction Column
Wu Shaomin, Hu Xueqin, Hou Guijun, Liu Chunjiang
(State Key Laboratory of Chemical Engineering, School of Chemical Engineering, Tianjin University, Tianjin 300072, China
Abstract j Mass transfer efficiency of reciprocating structured packing extraction column was
measured by tributylphosphate-kerosene-acetic acid-water system. Influences of packing installation
mode and flow rates of both dispersed phase and continuous phase on holdup of the dispersed phase and
mass transfer efficiency of the column were investigated. Among the three packing installation modes
namely non-segmented, segmented I( space between two packings 50 mm )and segmented II(space
between two packings 100 mm), installation mode of segmented I was the best in the performance
considering both dispersed phasc holdup and mass transfer efficiency. When the both phase flow rates
vere small, dispersed phase holdup of reciprocating structured packing cxtraction column was 30%
higher than that of reciprocating sieve plate extraction column. Under the same operating conditions
apparent height of mass transfer unit of reciprocating structured packing extraction column was 18%
lower than that of reciprocating sieve plate extraction column
L Keywords! reciprocating structured packing extraction column; liquid-liquid extraction; structured
packing dispersed phase holdup; apparent height of mass transfer unit
液液萃取过程在石化、治金和制药等领域有着杂,分散相难以破碎,对传质不利。因此常常通过
广泛的应用。液液萃取过程中,液液两相的宏观流引入外加能量来促进液滴的分散,改善两相流动
动、液滴的破碎和聚并、液液界面的湍动等不同尺状况,提高传质效率2。常见的引人外加能量的
度的传递行为,对液液萃取效率有重要的影响,深萃取设备主要有脉冲塔、往复振劝筛板塔和转盘萃
人研究不同尺度的传递现象对开发新型萃取设备取塔
有非常重要的作用。
唐晓津等3指出分散一聚集筛板分布方式比
目前工业上常用的液液萃取设备主要有混合标准筛板分布方式的传质效率高30%以上。胡竞
澄清槽、填料萃取塔、筛板萃取塔和喷淋塔等。在
收稿日期]2009-08-10;『修改稿日期]2009-10-27
液液两相逆流萃取过程中,对于两相密度差较小
作者简介」吴少敏(1957~),女,浙江省东阳市人,大专,工程师
以及表面张力较大的物系,炳相流动状况比较复电话022-27404732,电邮cheraw(@tju.cdu.cn。