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Structured Packing

a structure and packing technology, applied in the direction of liquefaction, separation processes, lighting and heating apparatus, etc., can solve the problems of increasing the pressure drop through the column comprised of the packing, and achieve the effect of reducing cost saving, and increasing the efficiency of mass transfer

Inactive Publication Date: 2013-09-12
AIR PROD & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a cost-effective and efficient solution for mass transfer and heat transfer in columns or column divisions that have at least one pair of converging walls or wall portions. By using a structured packing optimised for this configuration, the presence of these walls or corners in the column or column division reduces the mixing of fluid in the edge zone, resulting in improved efficiency of mass transfer and heat transfer. This solution has not previously been considered necessary and is currently not being used in practical applications.

Problems solved by technology

However, each rotation increases the pressure drop through the column comprised of the packing.

Method used

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Examples

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examples

[0075]A comparison of the performance of structured packing according to the prior art with structured packing according to the invention was conducted in a cryogenic distillation apparatus including either a column with a D-shaped cross-section or a column with a circular cross section for the separation of argon from oxygen. For the column with a circular cross section, approximately 20 layers of packing, where each layer of packing is approximately 210 mm in height and 900 mm in diameter, are stacked on top of each other at 90° orientations inside a cryogenic distillation column. For the column with a D-shaped cross-section, approximately 20 layers of packing, where each layer of packing is approximately 210 mm in height and has a 900×450 mm semi-circular area, are stacked on top of each other at 90° orientations inside a cryogenic distillation column. All the comparisons were conducted under total internal reflux at a column pressure of 0.4 barg (40 kPa gauge). The separation of...

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Abstract

An apparatus for a heat transfer or mass transfer process, comprising a column or divided column having at least one pair of converging walls or wall portions and, within at least a region of the column or divided column bounded by at least one pair of converging walls or wall portions, a structured packing having a corrugation angle of at least about 50°; a method of heat and / or mass transfer applicable to the apparatus; and a method of installation of structured packing into a relevant apparatus.

Description

FIELD[0001]The present invention generally relates to structured packing. Structured packing has particular application in heat and / or mass exchange columns, especially in cryogenic air separation processes, although it may be used in other applications, such as heat exchangers, for example.BACKGROUND[0002]The term “column” as used herein means a distillation or fractionation column or zone, i.e. a column or zone wherein liquid and vapour phases are countercurrently contacted to effect separation of a fluid mixture, such as by contacting of the vapour and liquid phases on packing elements or on a series of vertically-spaced trays or plates mounted within the column.[0003]A divided wall column is a system of thermally coupled distillation columns. In divided wall columns, at least one dividing wall is located in the interior space of the column. The dividing wall generally is vertical. Two different mass transfer separations may occur on either side of the dividing wall, for example....

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25J3/00F28C3/06B21D53/02
CPCB01J19/32B01J2219/3306F25J3/04909F25J3/04939F25J3/04412F25J3/04678F25J2290/12Y10T29/4935B01J2219/3221B01J2219/32237B01J2219/32268B01J2219/32275B01J2219/32408B01J2219/32483B01D3/32B01J2219/32213B01J2219/3222B01J2219/32227B01J2219/32244B01J2219/32255B01J2219/32272B01J2219/3313
Inventor WILSON, JONATHANSUNDER, SWAMINATHANHOUGHTON, PATRICK ALAN
Owner AIR PROD & CHEM INC
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