规整填料在高压精馏条件下的传质性能

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规整填料在高压精馏条件下的传质性能

张鹏; 刘春江; 王利东; 唐忠利; 余国琮

Chemical Engineering Research Center, School of Chemical Engineering, Tianjin University,
Tianjin 300072, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-12-28 发布日期:2002-12-28
通讯作者: 张鹏

Performance of Structured Packing in High Pressure Distillation

ZHANG Peng; LIU Chunjiang; WANG Lidong; TANG Zhongli; YU Guocong

Chemical Engineering Research Center, School of Chemical Engineering, Tianjin University,
Tianjin 300072, China

Received:1900-01-01 Revised:1900-01-01 Online:2002-12-28 Published:2002-12-28
Contact: ZHANG Peng

摘要/Abstract

摘要： Performance of Mellapak 250Y and 350Y corrugated structured packing in distillation
applications at pressures rangingfrom 0.3 to 2.0MPa is analysed by using HTU-NTU method.
These data are obtained in a distillation column with 0.15 m diameter op-erated with n-
butane/n-pentane system at total reflux. In considering the axial backmixing effects, the
height of an overall gas phasetransfer unit, HTUOG, is divided into two parts. One part
represents the height of an overall gas phase transfer unit, withoutbackmixing,designated
asHTU*OG, and the other part, designated as the height ofa backmixing unit (HBUo), accounts
for the backmixing effects.The HTUOG is evaluated from the measured concentration profile
of n-butane in liquid phase. The HBUo obtained experimentally iscorrelated in terms of the
properties of the materials being separated and the equivalent diameter of the structured
packing. Our resultshows that HBUo varies from 0.12 to 0.34 m as pressure increases from
1.0 to 1.9 MPa. It indicates that the overall efficiency of thestructured packing decreases
gradually at high pressure, as a result of the vapor backmixing.

关键词: mass transfer;structured packing;backmixing;height of a transfer unit;high pressure

Abstract: Performance of Mellapak 250Y and 350Y corrugated structured packing in distillation
applications at pressures rangingfrom 0.3 to 2.0MPa is analysed by using HTU-NTU method.
These data are obtained in a distillation column with 0.15 m diameter op-erated with n-
butane/n-pentane system at total reflux. In considering the axial backmixing effects, the
height of an overall gas phasetransfer unit, HTUOG, is divided into two parts. One part
represents the height of an overall gas phase transfer unit, withoutbackmixing,designated
asHTU*OG, and the other part, designated as the height ofa backmixing unit (HBUo), accounts
for the backmixing effects.The HTUOG is evaluated from the measured concentration profile
of n-butane in liquid phase. The HBUo obtained experimentally iscorrelated in terms of the
properties of the materials being separated and the equivalent diameter of the structured
packing. Our resultshows that HBUo varies from 0.12 to 0.34 m as pressure increases from
1.0 to 1.9 MPa. It indicates that the overall efficiency of thestructured packing decreases
gradually at high pressure, as a result of the vapor backmixing.

Key words: mass transfer, structured packing, backmixing, height of a transfer unit, high pressure

张鹏, 刘春江, 王利东, 唐忠利, 余国琮. 规整填料在高压精馏条件下的传质性能[J]. CIESC Journal.

ZHANG Peng, LIU Chunjiang, WANG Lidong, TANG Zhongli, YU Guocong. Performance of Structured Packing in High Pressure Distillation[J]. .

参考文献

[1] Kister, H.Z., Larson, K.F., Yanagi, T., "How do trays and packings stack up",Chem. Eng.
Prog., 90, 23-32 (1994).
[2] Meier, W., Stoecker, W. D., Weinstein, B., "Performance of a new high efficiency
packing", Chem. Eng. Prog., 73, 71-77 (1977).
[3] Billet, T., Mackowiak, J., "Application of modern packings in thermal separation
process", Chem. Eng. Technol., 11, 213-227 (1988).
[4] Liu, C.J., Wang, L.D., Yuan, X.G., Yu, K.T., "Mass transfer characteristics in high
pressure distillation column packed with structured packing", J. Chem.Ind. Eng. (China),
52, 13-14 (2001). (in Chinese)
[5] Fitz, C. W., Kunesh, J. G., Shariat, A., "Performance of structured packing in a
commercial-scale column at pressures of 0.02-27.6 bar", Ind. Eng. Chen.Res., 38, 512-518
(1999).
[6] Billet, R., "Influence of initial liquid distribution on mass transfer in packed beds",
ChineseJ. Chem. Eng., 2, 98-112 (1994).
[7] Zuiderweg, F.J., Nutter, D.E., "Evidence of vapor backmixing in packed columns in the
case of high pressure distillation", IChemE Symp. Ser., 128,A481-A488 (1992).
[8] Sherwood, T.K., Pigford, R.L., Wilke, C.R., Mass Transfer, McGraw Hill,New York (1975).
[9] Reid, R.C., Prausnitz, J.M., The Properties of Gas and Liquids, McGraw Hill,New York
(1987).
[10] Billet, R., Schultes, M., "Fluid dynamics and mass transfer in the total capacity
range of packed columns up to the flood point", Chem. Eng. Technol., 18,371-379 (1995).
[11] Shi, J., Wang, J.D., Yu, K.T, Chen, M.H., Chemical Engineering Handbook,Chemical
Industry Press, Beijing (1996).(in Chinese)
[12] Zhang, P., Liu, C.J., Tang, Z.L., Yu, K.T., "Experimental determination of axial
mixing in two-phase flow through structured packings at elevated pressure: Axial mixing in
gas phase", J. Chem. Ind. Eng. (China), 52, 381-382(2001). (in Chinese)

规整填料在高压精馏条件下的传质性能

Performance of Structured Packing in High Pressure Distillation

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