WO2010145755A1 - Colonne d'échange de matière - Google Patents

Colonne d'échange de matière Download PDF

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Publication number
WO2010145755A1
WO2010145755A1 PCT/EP2010/003350 EP2010003350W WO2010145755A1 WO 2010145755 A1 WO2010145755 A1 WO 2010145755A1 EP 2010003350 W EP2010003350 W EP 2010003350W WO 2010145755 A1 WO2010145755 A1 WO 2010145755A1
Authority
WO
WIPO (PCT)
Prior art keywords
chimney
mass transfer
transfer column
fireplace
liquid
Prior art date
Application number
PCT/EP2010/003350
Other languages
German (de)
English (en)
Inventor
Gerhard Alzner
Christian Matten
Georg Schwamberger
Original Assignee
Linde Aktiengesellschaft
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 Linde Aktiengesellschaft filed Critical Linde Aktiengesellschaft
Publication of WO2010145755A1 publication Critical patent/WO2010145755A1/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
    • B01D3/16—Fractionating columns in which vapour bubbles through liquid
    • B01D3/18—Fractionating columns in which vapour bubbles through liquid with horizontal bubble plates
    • B01D3/20—Bubble caps; Risers for vapour; Discharge pipes for liquid
    • B01D3/205—Bubble caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0036—Flash degasification

Definitions

  • the invention relates to a mass transfer column having at least one chimney tray, which has at least one chimney with fireplace, the Kamindach is spaced from the upper end of the chimney, for mass transfer between an upwardly flowing gas phase and a downwardly flowing liquid phase, the gas phase from bottom to top through the fireplace is flowing.
  • Mass transfer columns are known in the art and serve for intensive contact and mass transfer between a gaseous and a liquid phase. Gaseous and liquid phase pass each other in countercurrent, the gaseous phase usually flows from bottom to top through the mass transfer column. Such mass transfer columns are used, for example, for purifying a gas phase with a liquid detergent. The gas phase flowing from the bottom up comes in the
  • Mass transfer column in intensive contact with the flowing from top to bottom liquid phase, which can be washed out of the gas phase with a suitable choice of the detergent in the liquid phase interfering components.
  • such a mass transfer column has various sections which fulfill different tasks in terms of process technology. If, for example, various components are to be removed from the gas phase, the gas phase generally flows through a plurality of sections of the column, which are each exposed to a different detergent. Such sections are separated from each other in the prior art by fireplace floors.
  • a fireplace floor is a floor which covers the entire cross section of the column.
  • On the fireplace floor is at least one, usually a variety, fireplace attached.
  • the gas phase of a column section in reach the overlying column section, ie it flows through the chimneys.
  • the liquid flowing down from above is collected on the chimney tray and drawn off. In doing so, appropriate measures must be taken to prevent the liquid from passing through the chimneys into the column section below.
  • the fireplace roofs according to the prior art consist of a U-profile. Due to the U-profile, the liquid collecting on the chimney roof can only flow down the chimney roof on two sides. Under a drip nose becomes a bar along at least part of the circumference, mostly along the entire
  • a drip tray consists of a nearly vertically oriented bar, which is mounted substantially equal to a gutter on the house roof along the circumference of the chimney cowl.
  • the chamber roofs are usually designed with a significantly larger diameter than the chimneys.
  • the drip lugs, if any, are pulled down to a height below the upper edge of the chimney. This makes it extremely difficult for liquid droplets to enter the chimney.
  • Liquid droplets would have to flow upwards to change the direction of the chimney to enter the chimney. But this can also be achieved without drip nose through Kamindharier, which have any conical or pyramidal shape with a larger footprint than the chimney, and the side surface / n ends below the upper edge of the chimney.
  • the supernatant ie the amount by which the cross section of the chimney cowl is greater than the cross section of the chimney, about the same order of magnitude, as the distance between the chimney and fireplace roof.
  • this is not always feasible for columns with large gas loads, ie columns where a large amount of gas has to flow through the chimneys from the lower section to the overlying column section.
  • By the given column cross-section can be installed in such cases, a sufficiently large number of fireplaces with correspondingly projecting fireplace roofs on the fireplace floor to ensure a sufficiently large gas flow through the fireplace floor.
  • the present invention is therefore based on the object to design a mass transfer column with chimney tray in such a way that the tightness of the chimney tray with respect to the downflowing liquid is significantly increased compared to the prior art. It should also be achieved in mass transfer columns with high gas load, a nearly 100% liquid tightness. Likewise, the chimney should have a nearly 100% liquid tightness even in the absence of gas flow, such as when starting the column.
  • the stated object is achieved in that there is a knitted fabric between the chimney and the fireplace roof.
  • the gas outlet surface which is formed by the gap between the chimney and the chimney cowl, closed with a knitted fabric. It has been shown that a knitted fabric with a suitable knit thickness and a specific surface can achieve almost 100% liquid tightness with simultaneous gas permeability.
  • the inventive arrangement of a knit fabric between the chimney and the fireplace roof, the gap still remains passable for gas, but is dense with respect to the liquid. The liquid-tightness is achieved in that in the fabric penetrating liquid droplets are agglomerated and discharged in this.
  • a knit fabric is understood to be a fabric mat made of metal, plastic or a mixture of the two materials.
  • the arrangement according to the invention of the knitted fabric between the chimney and the chimney roof is independent of the design of the chimney roof as a chimney roof with or without drip-offs.
  • the decisive factor is the arrangement of a knitted fabric in the gas passage between the chimney and the fireplace roof as a barrier to the liquid.
  • the fabric is arranged in the space between the chimney and the fireplace roof in such a way that there is no knit-free gap through which liquid can flow into the chimney.
  • the fabric is arranged such that the fabric forms a gap-free barrier in the gas outlet. Due to the gap-free barrier, no liquid can pass through the gas outlet into the chimney and thus into the column section below.
  • the fabric ends below the upper chimney edge on the chimney outside.
  • the fabric is thereby liquid-tight. Droplets penetrating the fabric are trapped inside and flow down the fabric as a result of gravity. Characterized in that the knit fabric in this embodiment of the invention below the upper edge on the outside of the Chimney ends, it is ensured that no liquid drops can flow out of the fabric into the fireplace.
  • the chimney cowl on a drip nose and the fabric fills the entire space, which is formed by the chimney, drip nose of the chimney cowl and console for fixing the chimney cowl.
  • the fireplace roof is attached by several means, such as struts, by means of a console by the fireplace.
  • the console is well below the top of the fireplace.
  • the holder of the fireplace roof can be integrated into the holder of the fabric.
  • the fireplace roof can be suitably designed in this embodiment as a U-profile with Abtropfnasen.
  • the attachment of the fabric has proven by means of a union tube with threaded rod to the cowl roof and console.
  • a stub tube which penetrates the fabric, carries the fireplace roof and is supported on the console.
  • this union tube is expediently a
  • the union tube is fixed by a threaded rod, which goes through the whole tube.
  • the threaded rod has a length which allows it to be screwed below the console and above the chimney cowl.
  • a nut is welded, in which the
  • Threaded rod is screwed.
  • the threaded rod protrudes through holes in the console out of this again.
  • the threaded rod is in turn screwed with a nut advantageously and fixed to the console.
  • the chimney roof holes for the threaded rod which in turn can be screwed back to the fireplace roof. The use of seals on the screws on the fireplace roof has proved to be useful.
  • the knitted fabric has a specific surface area of at least 300 m 2 / m 3 , particularly preferably at least 500 m 2 / m 3 , on. Experiments have shown that at a specific surface of at least 500 m 2 / m 3, the fabric is liquid-tight even when blasting with a standard garden hose from 500 mm distance.
  • the upper edge of the chimney has an inwardly directed
  • the inward chamfer at the top of the chimney ensures that even liquid drops that reach the inner surface of the fabric, due to gravity do not run into the fireplace, but down the outside of it.
  • the mass transfer column according to the invention is particularly suitable for use as a wash column with two separate wash cycles and different detergents.
  • the chimney tray separates the different washing cycles from each other.
  • the top down detergent of the first wash cycle is collected on the chimney tray and reissued above for reuse.
  • the inventive use of a knitted fabric ensures that the detergent of the first washing cycle can not get through the chimney through the fireplace floor in the second washing cycle. Mixing of the two different detergents is thus avoided.
  • the present invention it is possible in particular to achieve a nearly 100% liquid tightness of a chimney tray.
  • a knitted fabric according to the invention between the chimney and the chimney cowl, it is ensured that no liquid can pass through the chimney into the lower column bottom. This is ensured in particular in columns with a high gas flow rate.
  • the mass transfer column according to the invention ensures an almost 100% liquid density of the chimney tray during start-up, that is to say in the absence of gas counterflow.
  • FIG. 1 shows an embodiment of the invention.
  • FIG. 1 shows a chimney 1 in a chimney tray with a chimney roof 2.
  • the chimney roof 2 is designed as a U-profile which is open in front and behind and provided with a drip-off nose 3.
  • the drip nose 3 extends in this embodiment of the invention along the entire circumference of the chimney cowl 2.
  • the gas passage between the chimney 1 and chimney 2 is completely closed in this embodiment of the invention for liquid through the fabric 4.
  • the fabric 4 is fixed by means of union tube 5 and threaded rod 6 to the console 7 and the fireplace roof 2.
  • a nut 8 is welded, in which the threaded rod 6 is screwed, and indeed so far that the threaded rod 6 protrudes through the holes located in the console 7 again.
  • Below the console 7, the threaded rod 6 is in turn screwed to a nut 9, so that the union tube 5 is fixed in this way on the foot.
  • the fireplace roof 2, which in turn has holes for the threaded rod 6 is by means of screws 10 with the
  • the screws 10 on the cowl roof 2 have seals.
  • the knit 4 is longer than the distance between chimney 1 and chimney 2.
  • the knit 4 fills in this embodiment of the invention, the entire space of the console. 7 , Kamindach 2 and drip nose 3 is formed.
  • the chimney 1 has a fold 11 inwards. This ensures that the on the side facing the chimney-facing side of the knitted fabric and running down drops are not deflected into the fireplace, but to the outside.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

Colonne d'échange de matière qui comporte au moins une base de conduit comprenant au moins un conduit (1) pourvu d'un chapiteau (2), le chapiteau (2) étant situé à une certaine distance de l'extrémité supérieure du conduit (1). Ladite colonne sert à l'échange de matière entre une phase gazeuse s'écoulant vers le haut et une phase liquide s'écoulant vers le bas, la phase gazeuse s'écoulant du bas vers le haut dans le conduit. Une structure enchevêtrée (4) est placée dans le passage de gaz situé entre le conduit (1) et le chapiteau (2) du conduit.
PCT/EP2010/003350 2009-06-18 2010-06-02 Colonne d'échange de matière WO2010145755A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910029771 DE102009029771A1 (de) 2009-06-18 2009-06-18 Stoffaustauschkolonne
DE102009029771.5 2009-06-18

Publications (1)

Publication Number Publication Date
WO2010145755A1 true WO2010145755A1 (fr) 2010-12-23

Family

ID=42734614

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/003350 WO2010145755A1 (fr) 2009-06-18 2010-06-02 Colonne d'échange de matière

Country Status (3)

Country Link
AR (1) AR076843A1 (fr)
DE (1) DE102009029771A1 (fr)
WO (1) WO2010145755A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015122232A1 (de) * 2015-12-18 2017-02-23 Basf Se Kaminboden für eine Kolonne zur thermischen Behandlung von fluiden Gemischen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518746A (en) * 1948-06-14 1950-08-15 Fluor Corp Bubble cap
US2681218A (en) * 1950-07-22 1954-06-15 Standard Oil Dev Co Reduction of entrainment in bubble cap towers
DE1519639A1 (de) * 1966-02-28 1970-03-12 Inst Chemisches App Wesen Tech Glockenfoermiges Austauschelement fuer Bodenkolonnen
WO2008103304A2 (fr) * 2007-02-23 2008-08-28 Exxonmobil Research And Engineering Company Meilleur plateau de désentraînement pour un fonctionnement de haute capacité

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518746A (en) * 1948-06-14 1950-08-15 Fluor Corp Bubble cap
US2681218A (en) * 1950-07-22 1954-06-15 Standard Oil Dev Co Reduction of entrainment in bubble cap towers
DE1519639A1 (de) * 1966-02-28 1970-03-12 Inst Chemisches App Wesen Tech Glockenfoermiges Austauschelement fuer Bodenkolonnen
WO2008103304A2 (fr) * 2007-02-23 2008-08-28 Exxonmobil Research And Engineering Company Meilleur plateau de désentraînement pour un fonctionnement de haute capacité

Also Published As

Publication number Publication date
AR076843A1 (es) 2011-07-13
DE102009029771A1 (de) 2010-12-23

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