开窗导流式规整填料的流体力学性能.pdf

化工进展
298
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2011年第30卷增刊
研究开发
42LM9-.
开窗导流式规整填料的流体力学性能
李雪,刘春江
(天津大学化学工程国家重点实验室,天津3000720
摘要:开发出一种新型开窗导流式规整填,并对其性能迸行测试。以空气水为介质,对开窗导流式规整塽料
350X进行流体力学性能测试,并在向种エ下,与传統全属板滅纹规整填料350X进行对比。研究表明:较传統
全属板波纹规整填耔,本研究提出的新型英料,其持液量高普通規整填15%左右,但压降有所提高。所以,通
过改变填料构,开设立体导流的小窗,能够促琎液膜交流动,增加有效传质画积,加强气液传质效率。此外,
在实验数据的基础上,得到新型填料的压降关联式,其误差为士10%,在工程允许范内,可用于指导工业生产
和设计
关键词:規整填料;压降;持液董;流体力学性能
中图分类号:TQ053,5
文献标志码:A
文章编号:1000-6613(2011)Z.2-0298-05
Hydrodynamics behavior of structured packing with diversion windows
LI Xue, LIU Chuniiang
Stale Key Iaboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China
Abstract: A novel structured packing with diversion windows is developed with the objective of achieving
comparable pressure drop, high capacity and preferable mass transfer efficiency. The hydrodynamics
performance of the packing has been investigated using a 384 mmm diameter column at room temperatures
and atmospheric pressures. ompared with the traditional Mellapak 350 the liquid holdup of the novel
structured packing (350X with diversion windows) are increased by 15 or so; additionally, the
pressure drop presented a slight growth trend, about 20% higher It is concluded that the novel
structured packing with adding diversion windows can change the flow pattern of the liquid film on the
packing sheet and increase the effective mass transfer area, as well as the gas-liquid mass transfer
efficiency. Furthermore, the pressure drop correlation of this new kind of structured packing has been
obtained for the industrial application on basis of experimental data, and the average deviation of +10%
lies in the accepted range
Key words: structured packing; pressure drop; liquid holdup; hydrodynamics performance
规整填料以其大通量、低压降、高传质效率等波纹填料片的波谷流动如图1,即填料片表面波谷
独特优势而在工业上得到大范围的推广应用。金处液膜较厚,波峰及其它表面的液膜覆盖性较差,
属板波纹规整填料具有整齐的几何结构和规则的排从而减小气液传质面积,影响传质效果。因此,在
列,压降小,可有效改善沟流、壁流现象,提高较深人硏究规整填料内气液流动状态和传质状况的
多的比表面积及更大的通量。通过多年的研究及工基础上,进一步开发出高效规整填料,无疑对工业
业应用,其良好的特性已得到充分地体现。当其生产具有极其重要意义。目前,针对规整填料绪构
用于精馏或吸收等气液传质操作时,填料内气液两
相一般为逆流接触传质或传热,液相沿填料表面呈收稿日期:20110902
膜状向下流动]。液膜在流动时,大部分液体均沿第一作者及联票人。李雪(1986),女,颂士研究生。Emml
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