WO1999001193A1 - Colonnes de distillation utilisees a des fins de fractionnement - Google Patents

Colonnes de distillation utilisees a des fins de fractionnement Download PDF

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Publication number
WO1999001193A1
WO1999001193A1 PCT/GB1998/001973 GB9801973W WO9901193A1 WO 1999001193 A1 WO1999001193 A1 WO 1999001193A1 GB 9801973 W GB9801973 W GB 9801973W WO 9901193 A1 WO9901193 A1 WO 9901193A1
Authority
WO
WIPO (PCT)
Prior art keywords
column
wall
distillation column
trays
shell
Prior art date
Application number
PCT/GB1998/001973
Other languages
English (en)
Inventor
Frigyes Lestak
Derek William Reay
Original Assignee
M. W. Kellogg Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by M. W. Kellogg Limited filed Critical M. W. Kellogg Limited
Priority to AU82307/98A priority Critical patent/AU8230798A/en
Publication of WO1999001193A1 publication Critical patent/WO1999001193A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/141—Fractional distillation or use of a fractionation or rectification column where at least one distillation column contains at least one dividing wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30

Definitions

  • the present invention relates to distillation columns for fractionation of a feedstock consisting of several components and, in particular, to an improved distillation column of a divided wall design.
  • distillation columns retrofitted in this manner may require a subsequent heat treatment to alleviate local stresses.
  • the present invention provides a distillation column for fractionation of a feedstock into a plurality of fractions, the distillation column comprising a feed inlet located between the top and the bottom of the column, an overhead outlet at the top of the column, a bottoms outlet at the bottom of the column and at least one side stream outlet positioned between the top and the bottom of the column, the said column being provided with a plurality of plates, trays or packed section (s) arranged so that, in use, efficient contact between vapour and liquid is provided, the said column having a vertically extending wall which divides the column into a feed section into which the feedstock enters and a take-off section from which the side stream or streams are taken, characterized in that the said vertically extending wall is constructed from a plurality of wall segments, the wall segments being installed between trays or plates which extend horizontally across substantially the width of the column, or between the grids which support the packed sections.
  • the distillation column of the present invention may either be constructed from appropriate new parts or may be constructed by appropriately modifying (retrofitting) an existing distillation column.
  • the wall segments used in the present invention may be constructed as a single piece, or may comprise a plurality of wall elements which are joined together to form a wall segment.
  • the construction of the wall segment from a plurality of wall elements may make it easier to construct a divided wall when a distillation column is being retrofitted.
  • the distillation column design of the present invention may be used in columns with horizontally extending trays or plates.
  • the column will have trays with downcomers located at the side and at the centre. Every alternate tray will generally have central downcomers.
  • the trays between which the wall segments are fitted generally have weirs (downcomers) located at the side edges thereof.
  • the receptors which are provided in or on the trays may be of channel-shaped cross-section, or T- shaped support attachment which are of a suitable dimension to receive at least one end of the wall sections therein.
  • the top end of one wall and the bottom end of the wall section below it in the column are located in a multiple receptor provided on the tray positioned between the wall sections.
  • each wall segment adjacent the column shell are preferably attached to the bolting bars which are generally attached to support rings fixed to the column shell.
  • the dividing wall segments are sealed from the bolting bars and the bolting bars are sealed from the shell of the distillation column by means of gaskets.
  • the bolting bars may typically be welded or bolted to the support rings.
  • the concept of using dividing wall elements may be used in distillation columns fitted with plates or trays which are used for a single pass, or can be used with two, three and four pass trays.
  • the concept of the present invention can be applied to packed columns.
  • the wall elements are positioned between the grids which support the packed sections.
  • the vertically extending ends of the wall segments are attached to bolting bars which are attached to the packing support rings.
  • the packing support rings are fixed to the column shell, typically by welding.
  • one or more of the wall segments is insulated.
  • the distillation column design of the present invention makes it possible to thermally insulate only those portions of the dividing wall which require insulation. This provides an economic and efficient column design.
  • the insulation of one or more wall segments extends to a height which is above the height of the level of liquid which the tray and downcomer are designed to hold.
  • the insulation will extend from the level of one tray to a height which is about three inches above the level of the tray above.
  • the thermal insulation may be provided as a solid material, such as a concrete, or any other suitable material.
  • the vertical edges of the bolting bars to which the wall segments are attached are sealed from the shell by means of gaskets.
  • the distillation column of the present invention is of simple construction and obviates the necessity to weld to the column shell which is a time consuming operation.
  • the provision of the divided wall in segments, together with the provision of the appropriate receptors in or on the column plates or trays, and the use of bolting bars, enables the revamping of a distillation column to be undertaken with a minimum of changes to an existing tray arrangement. This is less onerous than the installation of a dividing wall in a single piece, welded to the wall, which would require the removal and disposal of all trays in the column, or column section.
  • a similar ease of construction is also encountered for packed columns .
  • Figure 1 is a schematic diagram of a prior art divided wall column
  • Figure 2 is a schematic diagram of a central section of a divided wall column in a two-pass trayed column
  • Figure 3 is a schematic diagram of one manner in which the divided wall segments may be joined together in the present invention.
  • Figure 4 is a schematic illustration of the manner in which the edges of the bolting bar segments may be sealed from the shell of the column; and Figure 5 is a schematic illustration of the concept of the present invention in relation to packed columns.
  • Figure 1 illustrates schematically a prior art divided wall distillation column 1 which comprises a shell 2 divided into a prefractionator portion 3 and a main column portion 4 by means of a dividing wall 5.
  • a feedstock comprising a mixture of hydrocarbon components A, B and C is fed into the prefractionator portion 3 of the column at 6.
  • the column is operated according to known techniques so that a lower boiling point fraction A is taken off from the top of the column, the higher boiling point fraction C from the bottom of the column and a middle boiling fraction B from the side of the column.
  • the dividing wall 5 may be partially or fully insulated, if desired.
  • the lower boiling point fraction A is passed through a condenser 7 and the higher boiling point fraction C is passed through a reboiler 8, with appropriate means to recycle a portion of each of the streams to the column.
  • the central section of a distillation column 10 has a wall 11 which divides the column into two.
  • the column is of the so-called two pass tray type provided with a plurality of trays 12 which straddle the dividing wall 11, and a plurality of trays 13 which extend from the shell of the column.
  • Trays 12 have weirs (downcomers) at the sides thereof (not shown)
  • trays 13 have central weirs
  • Feedstock enters at 14, with the side product B being removed at 15.
  • FIG. 3 illustrates one manner in which the divided wall segments may be joined together in accordance with the present invention.
  • Dividing wall segments 21 and 22 abut a modified central panel 23 which is attached to the horizontally extending tray sections 24 and 25 which are secured by appropriate means, not shown.
  • the upper wall segment 21 is attached to a wall support element 26.
  • the wall may be bolted to the central panel 23 or inserted in a channel shaped central section (not shown) .
  • the insulation block 27 which is adjacent to or forms part of the dividing wall will be of a height extending from the level of trays 24 and 25 to the top of the downcomer of the tray which is above trays 24 and 25, not shown. Insulation will generally only be required on the section of the wall that contacts liquid since the heat transfer coefficient on the vapour side is significantly lower than on the liquid side.
  • the lower wall segment 22 is located adjacent wall support 28.
  • the wall support may comprise a flange to which the upper end of the wall segment 22 may be attached by bolting or welding.
  • the lower wall segment is not insulated.
  • a plurality of wall segments will be mounted between adjacent trays in the manner as described with reference to Figure 3.
  • a distillation column of the two-pass or four-pass type it is only the centrally extending trays which require modification to retrofit a dividing wall in the distillation column as a plurality of wall segments.
  • the other components of the distillation column will be constructed according to known design techniques.
  • Dividing wall elements can also be installed in an orientation parallel to the flow path, using the technique of bolting bars and modified tray panels. The vertical bolting bars are welded or bolted to tray support rings.
  • FIG 4 illustrates one simple way in which the bolting bars may be secured using the tray support ring 31 that is welded to the shell of the distillation column.
  • a support ring 31 is welded to the shell of the column.
  • the column shell abuts the edge 31a of the ring.
  • a dividing wall segment 32 is spaced fractionally from the column shell at 33.
  • the end of side 34 of the wall segment 32 is bolted thereto by a bolting bar 36.
  • the bolting bar also has a gasket holder 37 bolted thereto which houses rope gasket 38 which presses against the shell of the column. Gasket 38 serves to provide a seal between the side of the wall and the column shell.
  • FIG. 5 illustrates the use of a divided wall constructed from a plurality of wall segments for packed columns.
  • packing support rings 39 are welded to the shell 40 of a distillation column.
  • the packing support grids 41 are supported by the support rings 39.
  • Bolting bars 42 are bolted or welded to the support rings 39 at the upper end and the lower ends thereof (not shown) .
  • the bolting bars 42 are sealed from the column shell by means of gaskets (not shown) .
  • Insulted wall panels 43 are fitted at the vertically extending edges thereof to the bolting bars 42. Appropriately shaped packing (not shown) is then placed on the support grids 41.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

L'invention traite d'une colonne de distillation permettant de fractionner une charge d'alimentation en une pluralité de fractions. Cette colonne de distillation comporte un orifice d'alimentation situé entre la partie supérieure et la partie inférieure de la colonne; un orifice de sortie du distillat de tête situé en haut de la colonne; un orifice de sortie des résidus situé en bas de la colonne; et au moins un orifice de sortie des fractions latérales situé entre la partie supérieure et la partie inférieure de la colonne. Cette colonne comporte en outre une série de plaques, de plateaux ou de sections à garnissage conçus pour assurer un contact efficace entre la vapeur et le liquide en cours d'utilisation. Ladite colonne comporte une paroi verticale qui la divise en une partie alimentation, par laquelle la charge d'alimentation pénètre, et en une partie évacuation destinée à évacuer lesdites fractions latérales. Ladite paroi verticale est construite à partir d'une série de segments disposés entre les plateaux ou plaques qui s'étendent horizontalement sur sensiblement toute la largeur de la colonne, ou entre les quadrillages qui soutiennent les sections à garnissage.
PCT/GB1998/001973 1997-07-03 1998-07-03 Colonnes de distillation utilisees a des fins de fractionnement WO1999001193A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU82307/98A AU8230798A (en) 1997-07-03 1998-07-03 Distllation columns for fractionation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9714093.3A GB9714093D0 (en) 1997-07-03 1997-07-03 Improvements in or relating to distillation columns for fractionation
GB9714093.3 1997-07-03

Publications (1)

Publication Number Publication Date
WO1999001193A1 true WO1999001193A1 (fr) 1999-01-14

Family

ID=10815348

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/001973 WO1999001193A1 (fr) 1997-07-03 1998-07-03 Colonnes de distillation utilisees a des fins de fractionnement

Country Status (3)

Country Link
AU (1) AU8230798A (fr)
GB (1) GB9714093D0 (fr)
WO (1) WO1999001193A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10124690A1 (de) * 2001-05-18 2002-11-21 Montz Gmbh Julius Befestigungsteile und Dichtungen für Trennwandelemente einer mehrteiligen Trennwand
EP1647318A2 (fr) * 2004-10-18 2006-04-19 Air Products And Chemicals, Inc. Colonne à paroi de division
EP2161063A1 (fr) * 2008-09-03 2010-03-10 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Méthode de construction d'une colonne avec partition
CN101348412B (zh) * 2007-07-18 2011-07-20 中国石油化工股份有限公司 用于苯乙烯精馏的节能方法
US8480860B2 (en) 2008-10-22 2013-07-09 Air Products And Chemicals, Inc. Divided wall columns for smaller sized plants
DE102015014708A1 (de) * 2015-11-16 2017-05-18 Julius Montz Gmbh Kolonne mit mindestens einer Trennwand
CN109833639A (zh) * 2017-11-27 2019-06-04 天津中福环保科技股份有限公司 一种隔壁塔内的分体式隔板
DE102018006707A1 (de) * 2018-08-24 2020-02-27 Julius Montz Gmbh Kolonne mit Trennwand

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122367A2 (fr) * 1983-01-26 1984-10-24 BASF Aktiengesellschaft Colonne de distillation fractionnée
DE4444891A1 (de) * 1994-12-16 1996-06-20 Buna Gmbh Verfahren und Vorrichtung zum Betreiben einer Rektifikation in stark variierenden Lastbereichen
EP0804951A2 (fr) * 1996-04-30 1997-11-05 BASF Aktiengesellschaft Colonne de rectification pour la séparation en continu par distillation d'un mélange de substances multiples

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122367A2 (fr) * 1983-01-26 1984-10-24 BASF Aktiengesellschaft Colonne de distillation fractionnée
DE4444891A1 (de) * 1994-12-16 1996-06-20 Buna Gmbh Verfahren und Vorrichtung zum Betreiben einer Rektifikation in stark variierenden Lastbereichen
EP0804951A2 (fr) * 1996-04-30 1997-11-05 BASF Aktiengesellschaft Colonne de rectification pour la séparation en continu par distillation d'un mélange de substances multiples

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002094408A1 (fr) 2001-05-18 2002-11-28 Julius Montz Gmbh Elements de fixation et profile d'etancheite pour elements d'une paroi de separation a elements multiples
US7287747B2 (en) * 2001-05-18 2007-10-30 Julius Montz Gmbh Partition assembly for packed or tray column
DE10124690A1 (de) * 2001-05-18 2002-11-21 Montz Gmbh Julius Befestigungsteile und Dichtungen für Trennwandelemente einer mehrteiligen Trennwand
EP1647318B1 (fr) * 2004-10-18 2010-08-11 Air Products And Chemicals, Inc. Colonne à paroi de division
EP1647318A2 (fr) * 2004-10-18 2006-04-19 Air Products And Chemicals, Inc. Colonne à paroi de division
US7422197B2 (en) 2004-10-18 2008-09-09 Air Products And Chemicals, Inc. Divided wall exchange column
EP1974782A3 (fr) * 2004-10-18 2008-10-08 Air Products and Chemicals, Inc. Colonne à paroi de division
US7604222B2 (en) 2004-10-18 2009-10-20 Air Products And Chemicals, Inc. Divided wall exchange column
CN101348412B (zh) * 2007-07-18 2011-07-20 中国石油化工股份有限公司 用于苯乙烯精馏的节能方法
WO2010025980A1 (fr) * 2008-09-03 2010-03-11 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Procédé de fabrication de colonnes à parois divisées
EP2161063A1 (fr) * 2008-09-03 2010-03-10 L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Méthode de construction d'une colonne avec partition
CN102143787A (zh) * 2008-09-03 2011-08-03 乔治洛德方法研究和开发液化空气有限公司 用于制造分壁式塔的方法
CN102143787B (zh) * 2008-09-03 2013-12-04 乔治洛德方法研究和开发液化空气有限公司 用于制造分壁式塔的方法
US8968524B2 (en) 2008-09-03 2015-03-03 L'air Liquid Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for fabricating divided wall columns
US8480860B2 (en) 2008-10-22 2013-07-09 Air Products And Chemicals, Inc. Divided wall columns for smaller sized plants
DE102015014708A1 (de) * 2015-11-16 2017-05-18 Julius Montz Gmbh Kolonne mit mindestens einer Trennwand
US10710001B2 (en) 2015-11-16 2020-07-14 Julius Montz Gmbh Column with at least one partition
CN109833639A (zh) * 2017-11-27 2019-06-04 天津中福环保科技股份有限公司 一种隔壁塔内的分体式隔板
DE102018006707A1 (de) * 2018-08-24 2020-02-27 Julius Montz Gmbh Kolonne mit Trennwand

Also Published As

Publication number Publication date
GB9714093D0 (en) 1997-09-10
AU8230798A (en) 1999-01-25

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