WO2009021924A1 - Charge support grating - Google Patents
Charge support grating Download PDFInfo
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- 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
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- Prior art keywords
- support grid
- grid
- supporting
- sectional area
- cross
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
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.
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
Description
Beschreibung description
Schüttungs-TragrostLifter support grid
Die Erfindung betrifft einen Tragrost für eine Schüttung in einer Vorrichtung, wobei die Schüttung und der Tragrost von einem Gas, Gasgemisch, Flüssigkeit oder Flüssigkeitsgemisch durchströmt werden. Die Erfindung wird am Beispiel eines Tragrostes für eine Katalysatorschüttung in einer Vorrichtung zur Propan-Dehydrierung beschrieben, ist aber nicht auf einen derartigen Einsatz beschränkt und prinzipiell für den Einsatz als Tragrost bei einer beliebigen durchströmten Schüttung geeignet.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.
Alkene wie Propen und Isobuten wurden bis vor einigen Jahrzehnten hauptsächlich als Nebenprodukte in Prozessen wie z.B. der Ethylenproduktion im Steam-Cracker erzeugt. Hierbei können bestimmte Alken/Ethen-Verhältnisse jedoch nicht überschritten werden. Für Propen liegt dieser Grenzwert beispielsweise bei ca. 0,65. Da der Bedarf an Propen in den letzten Jahrzehnten stärker gestiegen ist als der Bedarf an Ethen, musste die Produktion von Propen von der Produktion von Ethen entkoppelt und neue Methoden zur großtechnischen Produktion dieses Stoffes gefunden werden. Neben der Alkengewinnung aus Raffinierie-Crackgas hat sich als bedeutendes Verfahren die De- hydrierung, d.h. die Abspaltung von Wasserstoff herausgebildet. Bei der Propan- Dehydrierung wird auf wirtschaftliche Weise aus Propan Propen erzeugt.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. However, certain alkene / ethene ratios can not be exceeded. For propene, 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. Besides alkene recovery from refinery cracking gas, the important process has been the dehydrogenation, i. the elimination of hydrogen formed. In propane dehydrogenation propene is produced economically from propane.
Zur industriellen Dehydrierung wurden in den letzten Jahrzehnten mehrere Verfahren entwickelt, die alle auf einem gemeinsamen Grundprinzip basieren. Der Einsatz aus frischem Propan wird beispielsweise zuerst in einer C3-/C4-T rennstufe von schweren Bestandteilen, wie sie stets als Verunreinigungen vorhanden sind, gereinigt und nach einer Vorwärmung auf Reaktionstemperatur einem Reaktor zugeführt, in welchem die katalytisch unterstützte, endotherme Dehydrier-Reaktion abläuft. Aus thermodynami- schen und verfahrenstechnischen Gründen verlassen zwischen 50% und 90% des Propans den Reaktor ohne chemische Veränderung (Konversion). Keines der Verfahren im Stand der Technik besitzt eine 100%-ige Selektivität, d.h. aus den an den chemischen Reaktionen teilnehmenden Propanmolekülen entstehen neben dem gewünschten Produkt Propen zu einem Teil auch andere Substanzen.For industrial dehydration, several methods have been developed in recent decades, all based on a common basic principle. The use of fresh propane, for example, first in a C3 / C4 T rennstufe of heavy components, as they are always present as impurities, cleaned and fed to a reactor after preheating to reaction temperature, in which the catalytically supported, endothermic dehydrogenation reaction expires. For thermodynamic and process reasons, between 50% and 90% of the propane leaves the reactor without chemical change (conversion). None of the prior art methods has 100% selectivity, i.e., 100% selectivity. From the propane molecules participating in the chemical reactions, in addition to the desired product propene, some other substances are also formed.
Die Ausbeute an Propen ist sensibel von den Reaktionsbedingungen im Reaktor abhängig. Nach dem Stand der Technik bestehen derartige Reaktoren zur Propan- Dehydrierung aus Vorrichtungen, beispielsweise Rohren, die mit einer regellosen Katalysatorschüttung befüllt sind. Diese Katalysatorschüttungen werden auf einem Tragrost in den Rohren gehalten. Die gasförmigen Reaktanten durchströmen die Vorrichtung und die regellose Katalysatorschüttung und treten dann über den Tragrost als Reaktionsprodukte aus. Ein Tragrost nach dem Stand der Technik füllt die gesamte Querschnittsfläche der Vorrichtung aus, um die regellose Katalysatorschüttung zu halten, und weist zahlreiche Öffnungen auf, um die gasförmigen Reaktionsprodukte passieren zu lassen. Beim Durchströmen der Kombination Katalysatorschüttung - Tragrost baut sich in der gasförmigen Phase Druck auf, welcher von einem Druckverlust des Tragrostes gefolgt wird. Das Problem des Druckaufbaus bzw. des Druckverlustes macht sich besonders bei Reaktionen unter Volumenzunahme, wie der Propan-Dehydrierung, bemerkbar. Ein Druckaufbau kann jedoch auch bei volumenneutralen und volumen- kompressiven Reaktionen nachteilig sein.The yield of propene is sensitively dependent on the reaction conditions in the reactor. According to the prior art, such 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. When flowing through the combination catalyst bed - support grate pressure builds up in the gaseous phase, which is followed by a pressure drop of the support grid. The problem of pressure build-up or pressure loss is particularly noticeable in reactions involving an increase in volume, such as propane dehydrogenation. However, a build-up of pressure can also be disadvantageous in the case of volume-neutral and volume-compressive reactions.
Der an Tragrosten nach dem Stand der Technik auftretende Druckverlust führt insbe- sondere bei Reaktionen unter Volumenzunahme, wie der Propan-Dehydrierung, zu einer Verschlechterung der Reaktionsbedingungen, der Umsätze und der Selektivität der Reaktion. Dadurch steigt der Energiebedarf beziehungsweise sinkt die Ausbeute des Verfahrens.The pressure loss occurring on support grates according to the prior art leads, in particular in reactions under volume increase, such as the propane dehydrogenation, to a deterioration of the reaction conditions, the conversions and the selectivity of the reaction. This increases the energy requirement or decreases the yield of the process.
Der vorliegenden Erfindung liegt somit die Aufgabe zugrunde, einen Tragrost der eingangs erwähnten Art derart auszugestalten, dass der Druckverlust des Tragrostes bzw. der Druckaufbau des Tragrostes minimiert wird.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.
Die vorliegende Aufgabe wird dadurch gelöst, dass die Fläche des Tragrostes größer als die Querschnittsfläche der Vorrichtung ist, in die der Tragrost eingebaut ist.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.
Durch die erfindungsgemäße Vergrößerung der Fläche des Tragrostes über die Querschnittsfläche der Vorrichtung hinaus, wird die von der Gasphase durchströmbare Fläche vergrößert und somit der Druckaufbau vor dem Tragrost bzw. der Druckverlust des Tragrostes minimiert.Due to the enlargement according to the invention of the surface of the support grid beyond the cross-sectional area of the device, 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.
In einer Ausgestaltung der Erfindung weist der Tragrost die Form eines Kegelmantels oder einer Pyramide auf. In dieser Ausgestaltung der Erfindung entspricht die Grundfläche des Kegels oder der Pyramide (je nach Gestalt der Querschnittsfläche der Vor- richtung) der vollen Querschnittsfläche der Vorrichtung. Als durchströmbare Fläche des Tragrostes steht jedoch die deutlich größere Oberfläche des Kegelmantels bzw. der Pyramidenseiten zur Verfügung. Durch diese erfindungsgemäße Vergrößerung der durchströmbaren Fläche des Tragrostes wird der durch den Tragrost hervorgerufene Druckverlust minimiert. Zusätzlich wird bei einem derartigen Tragrost, dessen Flächen einen Winkel zwischen 0° und 90° gegenüber der Horizontalen aufweisen, ein Zusetzen der Öffnungen erschwert beziehungsweise vermieden.In one embodiment of the invention, the supporting grid in the form of a cone sheath or a pyramid. In this embodiment of the invention, 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. However, as a through-flowable surface of the support grid, the significantly larger surface area of the conical shell or of the pyramid sides is available. By this invention enlargement of the flow-through surface of the support grid caused by the support grid pressure loss is minimized. In addition, in such a supporting grid, whose surfaces have an angle between 0 ° and 90 ° relative to the horizontal, clogging of the openings made difficult or avoided.
In einer anderen Ausgestaltung der Erfindung weist der Tragrost die Form der Querschnittsfläche der Vorrichtung mit einem aufgesetzten Zylinder auf, wobei die Oberflä- che des Tragrostes aus der Querschnittsfläche der Vorrichtung und der Mantelfläche des Zylinders besteht. In dieser Ausgestaltung der Erfindung ergibt sich als durchströmbare Fläche des Tragrostes, die volle Querschnittsfläche der Vorrichtung plus die Mantelfläche des Zylinders. Die zusätzliche Querschnittsfläche des Zylindermantels ist abhängig von der Höhe des Zylinders und kann somit flexibel an die jeweiligen Reaktionsbedingungen angepasst werden. D.h. mit zunehmender Höhe des aufgesetzten Zylinders steigt die Fläche des Zylindermantels und damit die durchströmbare Fläche des Tragrostes, wodurch der Druckverlust des Tragrostes sinkt.In another embodiment of the invention, 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. In this embodiment of the invention results as flow-through surface of the support grid, the full cross-sectional area of the device plus 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.
In einer weiteren Ausgestaltung der Erfindung weist der Tragrost die Form der Querschnittsfläche der Vorrichtung mit mindestens einem aufgesetzten Zylinder, mindestens einer aufgesetzten Pyramide und/oder mindestens einem aufgesetzten Kegel auf. Durch die Kombination der verschiedenen Formen bzw. durch den Einsatz mehrerer Zylinder oder Pyramiden kann der Tragrost flexibel an die Reaktionsbedingungen und an die Eigenschaften der Schüttung angepasst werden.In a further embodiment of the invention, 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. By combining the different shapes or by using several cylinders or pyramids, the support grid can be flexibly adapted to the reaction conditions and the properties of the bed.
Vorteilhafterweise besteht der Tragrost aus perforiertem Metall, insbesondere perforier- tem Blech, Drahtstäben oder gasdurchlässigem Keramikmaterial.Advantageously, the support grid consists of perforated metal, in particular perforated sheet metal, wire rods or gas-permeable ceramic material.
Es hat sich ebenfalls als vorteilhaft erwiesen, den Tragrost für eine Katalysatorschüt- tung anzuwenden, in der eine volumenvergrößernde Reaktion, insbesondere eine Reaktion zur Propan-Dehydrierung, abläuft. Der erfindungsgemäße Tragrost lässt sich mit besonderem Vorteil bei einer Katalysatorschüttung anwenden. Das Gas- oder Flüssigkeitsgemisch, welches die Katalysatorschüttung durchströmt, enthält die Reaktanten, die an dem Katalysatormaterial reagieren. Besonders bei Reaktionen von gasförmigen Reaktanten unter Volumenzunahme, wie der Propan-Dehydrierung, führt der Druckverlust eines Tragrostes nach dem Stand der Technik zu einer Verschlechterung der Re- aktionsbedingungen, der Umsätze, der Selektivität und somit zu einer Erhöhung des Energiebedarfs. Durch die Verwendung des erfindungsgemäßen Tragrostes lässt sich ein derartiges Verfahren deutlich optimieren.It has also proved to be advantageous to use the support grid for a catalyst charge, in which a volume-increasing reaction, in particular a reaction for propane dehydrogenation, takes place. 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. Particularly in the case of reactions of gaseous reactants with an increase in volume, such as propane dehydrogenation, 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. By using the supporting grid according to the invention, such a method can be significantly optimized.
Als ebenso zweckmäßig erweist sich die Verwendung des Tragrostes für beliebige Schüttungen, insbesondere Katalysatorschüttungen, Adsorbermaterial oder ähnliches.As useful also proves the use of the support grid for any beds, in particular catalyst beds, adsorber or the like.
Des Weiteren erweist es sich als vorteilhaft, den Tragrost für eine Katalysatorschüttung anzuwenden, in der eine volumenneutrale oder eine volumenkompressive Reaktion abläuft. Durch die Anwendung des erfindungsgemäßen Tragrostes für eine volumen- neutrale oder volumenkompressive Reaktion lässt sich der gesamte Energieverbrauch für vor- und/oder nachgeschaltete Pumpen und/oder Verdichter minimieren.Furthermore, it proves to be advantageous to apply the support grid for a catalyst bed in which a volume-neutral or a volume-compressive reaction takes place. By using 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.
Mit der vorliegenden Erfindung gelingt es insbesondere, den Druckaufbau vor dem Tragrost in der Schüttung bzw. den Druckverlust des Tragrostes zu minimieren.With the present invention, it is possible in particular to minimize the pressure build-up in front of the supporting grid in the bed or the pressure loss of the supporting grid.
Im Folgenden soll die Erfindung anhand eines Vergleiches mit dem Stand der Technik in den folgenden Figuren näher erläutert werden. Es zeigen:In the following, the invention will be explained in more detail with reference to a comparison with the prior art in the following figures. Show it:
Figur 1 ein Tragrost nach dem Stand der TechnikFigure 1 is a support grid according to the prior art
Figur 2 eine Ausgestaltung des erfindungsgemäßen Tragrostes.Figure 2 shows an embodiment of the supporting grid according to the invention.
Figur 1 zeigt einen Tragrost (1) nach dem Stand der Technik in einer mit einer Kataly- satorschüttung (3) befüllten Vorrichtungen (2) zur Propan-Dehydrierung. Die gasförmi- gen Reaktanten (R) durchströmen den Tragrost (1 ) und die darüber befindliche Kataly- satorschüttung (3). Die durchströmbare Fläche des Tragrostes (1 ) entspricht der gesamten Querschnittsfläche der Vorrichtung (2). Die Kombination Katalysatorschüttung (3) und Tragrost (1) stellt für die gasförmigen Reaktanten (R) ein Strömungshindernis dar, wodurch sich vor dem Tragrost (1 ) ein Druck aufbaut, welcher von einem Druck- verlust des Tragrostes (1) gefolgt wird. Zusätzlich kann es in bestimmten Fällen sinnvoll sein, zwischen den Tragrost (1 ) und die Katalysatorschüttung (3) eine Schicht aus Inertmaterial, wie beispielsweise Steatit, einzubringen.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). In addition, it may be useful in certain cases, between the support grid (1) and the catalyst bed (3), a layer of inert material, such as steatite, bring.
Figur 2 zeigt eine Ausgestaltung des erfindungsgemäßen Tragrostes (1 ), wie er in ei- ner Vorrichtung (2) zur Propan-Dehydrierung eingesetzt werden kann. In dieser Ausgestaltung der Erfindung weist der Tragrost die Form der Querschnittsfläche der Vorrichtung (2) mit einem aufgesetzten Zylinder (1 a) auf. Die durchströmbare Fläche des Tragrostes hat sich in dieser Ausgestaltung der Erfindung um die Fläche des Zylindermantels (1 a) erhöht. Bei einem kreisförmigen Querschnitt der Vorrichtung (2) mit einem Durchmesser von 100 mm und einem Durchmesser des Zylinders (1 a) von 50 mm bei einer Höhe des Zylinders (1a) von 500 mm ergibt sich eine Vergrößerung der durchströmbaren Fläche des Tragrostes um den Faktor 11. Der Druckverlust des Tragrostes sinkt in dieser Ausgestaltung der Erfindung auf 1 % gegenüber dem Stand der Technik. 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. In this embodiment of the invention, 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). In 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.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007038157A DE102007038157A1 (en) | 2007-08-13 | 2007-08-13 | Lifter support grid |
| DE102007038157.5 | 2007-08-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009021924A1 true WO2009021924A1 (en) | 2009-02-19 |
Family
ID=40032503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2008/060474 Ceased WO2009021924A1 (en) | 2007-08-13 | 2008-08-08 | Charge support grating |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102007038157A1 (en) |
| WO (1) | WO2009021924A1 (en) |
Cited By (5)
| 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 |
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| 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 |
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| DE102004015393A1 (en) * | 2003-03-27 | 2005-01-05 | Plasticon Germany Gmbh | Carrier grid plate for supporting random dumped column packing in e.g. distillation columns handling corrosive materials |
-
2007
- 2007-08-13 DE DE102007038157A patent/DE102007038157A1/en not_active Withdrawn
-
2008
- 2008-08-08 WO PCT/EP2008/060474 patent/WO2009021924A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1089732B (en) * | 1958-08-29 | 1960-09-29 | Verries Ind Reunies Du Loing S | Support grate for the filling bodies of a contact column |
| DE2924516A1 (en) * | 1979-06-18 | 1981-01-15 | Steuler Industriewerke Gmbh | Support grid for packed columns - having radially mounted elements with successive rows at progressively lower height to achieve arch effect |
| 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 (en) * | 1997-03-20 | 1998-09-24 | Norton Chemical Process Products Corporation | Tower packing support plate |
| DE102004015393A1 (en) * | 2003-03-27 | 2005-01-05 | Plasticon Germany Gmbh | Carrier grid plate for supporting random dumped column packing in e.g. distillation columns handling corrosive materials |
Cited By (6)
| 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 (en) | 2009-02-19 |
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