WO2009021924A1 - Grille de support de produit en vrac - Google Patents

Grille de support de produit en vrac Download PDF

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Publication number
WO2009021924A1
WO2009021924A1 PCT/EP2008/060474 EP2008060474W WO2009021924A1 WO 2009021924 A1 WO2009021924 A1 WO 2009021924A1 EP 2008060474 W EP2008060474 W EP 2008060474W WO 2009021924 A1 WO2009021924 A1 WO 2009021924A1
Authority
WO
WIPO (PCT)
Prior art keywords
support grid
grid
supporting
sectional area
cross
Prior art date
Application number
PCT/EP2008/060474
Other languages
German (de)
English (en)
Inventor
Falk Simon
Martin Dieterle
Frank Rosowski
Götz-Peter SCHINDLER
Heinz BÖLT
Peter Matthias Fritz
Original Assignee
Basf Se
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 Basf Se filed Critical Basf Se
Publication of WO2009021924A1 publication Critical patent/WO2009021924A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
    • B01J19/305—Supporting elements therefor, e.g. grids, perforated plates

Definitions

  • the invention relates to a support grid for a bed in a device, wherein the bed and the support grid are traversed by a gas, gas mixture, liquid or liquid mixture.
  • the invention is described using the example of a support grid for a catalyst bed in a device for propane dehydrogenation, but is not limited to such use and in principle suitable for use as a support grid in any flow-through bed.
  • Alkenes such as propene and isobutene were mainly used as by-products in processes such as e.g. produced ethylene production in the steam cracker.
  • certain alkene / ethene ratios can not be exceeded.
  • this limit is for example about 0.65. Since the demand for propene has risen faster in recent decades than the demand for ethene, the production of propene had to be decoupled from the production of ethene and new methods for large-scale production of this substance had to be found.
  • the important process has been the dehydrogenation, i. the elimination of hydrogen formed. In propane dehydrogenation propene is produced economically from propane.
  • reactors for propane dehydrogenation consist of devices, for example tubes, which are filled with a random catalyst bed. These catalyst beds are held on a support grid in the tubes. The gaseous reactants flow through the device and the random catalyst bed and then exit via the support grid as reaction products.
  • a prior art support grid fills the entire cross-sectional area of the device to hold the random catalyst bed, and has numerous openings to pass the gaseous reaction products.
  • the present invention is therefore the object of a support grid of the type mentioned in such a way that the pressure loss of the supporting grid or the pressure build-up of the supporting grid is minimized.
  • the present object is achieved in that the surface of the support grid is greater than the cross-sectional area of the device in which the support grid is installed.
  • the area through which the gas phase can flow is increased and thus the pressure build-up in front of the support grid or the pressure loss of the support grid is minimized.
  • the supporting grid in the form of a cone sheath or a pyramid.
  • the base area of the cone or pyramid (depending on the shape of the cross-sectional area of the device) corresponds to the full cross-sectional area of the device.
  • the significantly larger surface area of the conical shell or of the pyramid sides is available.
  • the support grid has the shape of the cross-sectional area of the device with an attached cylinder, wherein the surface of the support grid consists of the cross-sectional area of the device and the lateral surface of the cylinder.
  • the additional cross-sectional area of the cylinder jacket is dependent on the height of the cylinder and can thus be adapted flexibly to the respective reaction conditions. That is, with increasing height of the attached cylinder increases the surface of the cylinder jacket and thus the flow-through surface of the support grid, whereby the pressure loss of the support grid decreases.
  • the supporting grid has the shape of the cross-sectional area of the device with at least one attached cylinder, at least one pyramid and / or at least one attached cone.
  • the support grid consists of perforated metal, in particular perforated sheet metal, wire rods or gas-permeable ceramic material.
  • the support grid according to the invention can be used with particular advantage in a catalyst bed.
  • the gas or liquid mixture which flows through the catalyst bed contains the reactants which react on the catalyst material.
  • the pressure loss of a supporting grate according to the prior art leads to a deterioration of the reaction conditions, the conversions, the selectivity and thus to an increase in the energy requirement.
  • the support grid for a catalyst bed in which a volume-neutral or a volume-compressive reaction takes place.
  • the support grid according to the invention for a volume-neutral or volume-compressive reaction, the total energy consumption for upstream and / or downstream pumps and / or compressors can be minimized.
  • Figure 1 is a support grid according to the prior art
  • Figure 2 shows an embodiment of the supporting grid according to the invention.
  • FIG. 1 shows a prior art support grid (1) in a device (2) for propane dehydrogenation filled with a catalyst bed (3).
  • the gaseous reactants (R) flow through the support grid (1) and the catalyst bed (3) located above.
  • the flow-through surface of the support grid (1) corresponds to the entire cross-sectional area of the device (2).
  • the combination of catalyst bed (3) and support grid (1) represents a flow obstacle for the gaseous reactants (R), whereby a pressure builds up in front of the support grid (1), which is followed by a pressure loss of the support grid (1).
  • a layer of inert material such as steatite, bring.
  • FIG. 2 shows an embodiment of the supporting grid (1) according to the invention, as it can be used in a device (2) for propane dehydrogenation.
  • the supporting grid has the shape of the cross-sectional area of the device (2) with an attached cylinder (1 a).
  • the flow-through surface of the support grid has increased in this embodiment of the invention to the surface of the cylinder jacket (1 a).
  • a circular cross-section of the device (2) with a diameter of 100 mm and a diameter of the cylinder (1 a) of 50 mm at a height of the cylinder (1a) of 500 mm results in an increase in the area of the support grille can flow through the factor 11.
  • the pressure drop of the support grid drops in this embodiment of the invention to 1% compared to the prior art.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

L'invention concerne une grille de support (1) pour un produit en vrac (3), par exemple un garnissage de catalyseur, dans un dispositif (2), le catalyseur versé (3) et la grille de support (1) étant traversés par des réactifs (R) gazeux ou liquides. La surface de la grille de support (1) est plus grande que la surface de la section transversale du dispositif (2) dans lequel la grille de support est montée. La grille de support (1) est constituée par exemple de la surface de la section transversale du dispositif (2) sur laquelle est placé un cylindre (1a).
PCT/EP2008/060474 2007-08-13 2008-08-08 Grille de support de produit en vrac WO2009021924A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710038157 DE102007038157A1 (de) 2007-08-13 2007-08-13 Schüttungs-Tragrost
DE102007038157.5 2007-08-13

Publications (1)

Publication Number Publication Date
WO2009021924A1 true WO2009021924A1 (fr) 2009-02-19

Family

ID=40032503

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/060474 WO2009021924A1 (fr) 2007-08-13 2008-08-08 Grille de support de produit en vrac

Country Status (2)

Country Link
DE (1) DE102007038157A1 (fr)
WO (1) WO2009021924A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8067618B2 (en) 2006-04-27 2011-11-29 Basf Se Method for gas phase oxidation using a moderator layer
US8106220B2 (en) 2006-05-19 2012-01-31 Basf Se Preparation of phthalic anhydride by gas phase oxidation of O-xylene in a main reactor and postreactor
US8153825B2 (en) 2006-05-19 2012-04-10 Basf Se Preparation of phthalic anhydride by gas phase oxidation of o-xylene
US8263789B2 (en) 2006-12-21 2012-09-11 Basf Se Catalyst system and method for gas phase oxidation using an upstream layer
US8492566B2 (en) 2008-04-07 2013-07-23 Basf Se Method for starting a gas-phase oxidation reactor

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089732B (de) * 1958-08-29 1960-09-29 Verries Ind Reunies Du Loing S Tragrost fuer die Fuellkoerper einer Kontaktkolonne
DE2924516A1 (de) * 1979-06-18 1981-01-15 Steuler Industriewerke Gmbh Tragrost fuer fuellkoerpertuerme
US5281369A (en) * 1991-06-07 1994-01-25 Sulzer Brotthers Limited Supporting grate for packings in material exchange columns
US5510061A (en) * 1994-07-26 1996-04-23 Norton Chemical Process Products Corp. Non-welded support plate member
US5603904A (en) * 1993-06-18 1997-02-18 Chevron U.S.A. Inc. Apparatus for catalyst replacement
WO1998041321A1 (fr) * 1997-03-20 1998-09-24 Norton Chemical Process Products Corporation Plaque de support pour tours a emballer
DE102004015393A1 (de) * 2003-03-27 2005-01-05 Plasticon Germany Gmbh Tragrost

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089732B (de) * 1958-08-29 1960-09-29 Verries Ind Reunies Du Loing S Tragrost fuer die Fuellkoerper einer Kontaktkolonne
DE2924516A1 (de) * 1979-06-18 1981-01-15 Steuler Industriewerke Gmbh Tragrost fuer fuellkoerpertuerme
US5281369A (en) * 1991-06-07 1994-01-25 Sulzer Brotthers Limited Supporting grate for packings in material exchange columns
US5603904A (en) * 1993-06-18 1997-02-18 Chevron U.S.A. Inc. Apparatus for catalyst replacement
US5510061A (en) * 1994-07-26 1996-04-23 Norton Chemical Process Products Corp. Non-welded support plate member
WO1998041321A1 (fr) * 1997-03-20 1998-09-24 Norton Chemical Process Products Corporation Plaque de support pour tours a emballer
DE102004015393A1 (de) * 2003-03-27 2005-01-05 Plasticon Germany Gmbh Tragrost

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8067618B2 (en) 2006-04-27 2011-11-29 Basf Se Method for gas phase oxidation using a moderator layer
US8106220B2 (en) 2006-05-19 2012-01-31 Basf Se Preparation of phthalic anhydride by gas phase oxidation of O-xylene in a main reactor and postreactor
US8153825B2 (en) 2006-05-19 2012-04-10 Basf Se Preparation of phthalic anhydride by gas phase oxidation of o-xylene
US8263789B2 (en) 2006-12-21 2012-09-11 Basf Se Catalyst system and method for gas phase oxidation using an upstream layer
US9067187B2 (en) 2006-12-21 2015-06-30 Basf Se Catalyst system and method for gas phase oxidation using an upstream layer
US8492566B2 (en) 2008-04-07 2013-07-23 Basf Se Method for starting a gas-phase oxidation reactor

Also Published As

Publication number Publication date
DE102007038157A1 (de) 2009-02-19

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