KR101587682B1 - Distribution plate for fluidized bed reactor and fluidized bed reactor with same - Google Patents

Abstract

According to the present invention, a plurality of metal foam inserts made of metal foam; And a plate having a plurality of insertion ports into which the metal foam inserts are inserted, respectively, and a fluidized bed reactor having the dispersion plate. The dispersion plate for a fluidized bed reactor according to the present invention and the fluidized bed reactor having the dispersion plate have a dispersion plate composed of a metal foam insert and a plate formed with an inlet, so that the flow of the raw material gas through the dispersion plate, It is advantageous that the passage of the powder can be effectively prevented.

Description

FIELD OF THE INVENTION The present invention relates to a dispersion plate for a fluidized bed reactor,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluidized bed reactor, and more particularly, to a fluidized bed reactor and a dispersion plate for a fluidized bed reactor. Particularly, the present invention relates to a dispersion plate for a fluidized bed reactor and a fluidized bed reactor having the same, which can be used for producing a carbon nanostructure such as a carbon nanotube.

Fluidized bed reactors are reactor devices that can be used to perform a variety of multiphase chemical reactions. In a fluidized bed reactor, a fluid (gas or liquid) reacts with a solid material in a particulate state, typically the solid material is a catalyst having the shape of a small sphere and the fluid is flowed at a rate sufficient to float the solid material So that the solid material behaves like a fluid.

On the other hand, carbon nanostructures (CNS) refer to nano-sized carbon structures having various shapes such as nanotubes, nanofibers, fullerenes, nanocons, nanohorns, and nanorods, and have various excellent properties And thus it is utilized in various technical fields. Carbon nanotubes (CNTs), which are typical carbon nanostructures, are carbon nanotubes (CNTs) having three neighboring carbon atoms bonded to each other in a hexagonal honeycomb structure to form a carbon plane, and the carbon plane is cylindrically shaped to have a tube shape. Carbon nanotubes have a characteristic of being a conductor or a semiconductor according to the structure, that is, the diameter of a tube, and can be widely applied in various technical fields, and thus, they are popular as new materials. For example, the carbon nanotube can be applied to an electrode of an electrochemical storage device such as a secondary cell, a fuel cell or a supercapacity, an electromagnetic wave shielding, a field emission display, or a gas sensor.

The carbon nanostructure can be produced by, for example, an arc discharge method, a laser evaporation method, or a chemical vapor deposition method. In the chemical vapor deposition method among the above-mentioned manufacturing methods, metal catalyst particles and a hydrocarbon-based raw material gas are dispersed and reacted in a fluidized bed reactor at a high temperature to produce a carbon nanostructure. That is, the metal catalyst reacts with the raw material gas while floating in the fluidized bed reactor by the raw material gas to grow the carbon nanostructure.

A method for manufacturing a carbon nanostructure using a fluidized bed reactor is disclosed in Patent Application Publication No. 10-2009-0073346, No. 10-2009-0013503, and the like. In the case of using a fluidized bed reactor, a dispersing plate is used so that the gas is uniformly distributed in the reactor and the powder present on the dispersing plate does not pass below the dispersing plate. As the dispersion plate, a porous plate (perforate plate), a bubble cap, or a nozzle is generally used.

However, when the carbon source and the catalyst are reacted at a high temperature in the fluidized bed reactor, some carbon sources have a low pyrolysis temperature. Therefore, the carbon source is decomposed before contacting with the dispersing plate heated by the internal heat before passing through the vent hole of the nozzle, Clogging phenomenon appears. This clogging phenomenon causes a pressure drop in the fluidized bed, making stable operation difficult.

In addition, it is desirable that the gas distribution in the reactor should be uniform for smooth gas-solid mixing and that solid particles such as catalysts or powders can not pass below the dispersion plate. It continues.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a dispersion plate for a fluidized bed reactor capable of effectively preventing passage of solid particles or powder while uniformly distributing a gas in the reactor, Thereby providing a reactor.

Another object of the present invention is to provide a dispersion plate for a fluidized bed reactor and a fluidized bed reactor having the same, which can prevent clogging of the dispersion plate, can be manufactured at low cost, and can be easily installed and disassembled.

In order to achieve the above object, according to the present invention,

A plurality of metal foam inserts made of metal foam; And

And a plate having a plurality of insertion ports into which the metal foam inserts are inserted, respectively.

According to an aspect of the present invention, each of the plurality of metal foam inserts is formed to have a cylindrical shape, a truncated cone shape, and a prismatic shape, and each of the plurality of insertion holes corresponds to the shape of the metal foam insert .

According to another aspect of the present invention, the plurality of metal foam inserts are formed with flanges, and each of the plurality of insertion holes may have a seating portion on which the flange can be seated.

According to another aspect of the present invention, a protrusion is formed on a side surface of each of the plurality of metal foam inserts, and a groove corresponding to the protrusion may be formed in each of the plurality of insertion holes.

According to another aspect of the present invention, each of the plurality of metal foam inserts may be screwed to each of the plurality of insertion holes.

Also according to the present invention, there is provided a reactor comprising: a reactor body; And a plurality of metal foam inserts arranged in a predetermined position inside the reactor body and made of metal foam and a plate having a plurality of insertion ports into which the metal foam inserts are inserted, A fluidized bed reactor having a dispersion plate may be provided.

According to another aspect of the present invention, the dispersion plate may be supported by a support fixed inside the reactor body.

According to another aspect of the present invention, a metal foam sheet and a wire mesh may be selectively disposed on the top of the dispersion plate.

The dispersion plate for a fluidized bed reactor according to the present invention and the fluidized bed reactor having the dispersion plate are provided with a dispersion plate composed of a metal foam insert and a plate having an inlet formed therein so that the flow of the raw material gas through the dispersion plate, It is advantageous that the passage of the powder can be effectively prevented. In the dispersion plate according to the present invention, since the rise of the raw material gas can be accelerated, the phenomenon that the dispersion plate is clogged by the solid particles can be prevented. In addition, since the use of expensive metal foams is not relatively large, there is an economical advantage that production costs are low.

1 is a schematic view of a fluidized bed reactor for producing carbon nanotubes.
2 is a perspective view schematically showing an embodiment of a dispersion plate for a fluidized bed reactor and a support for supporting the dispersion plate according to the present invention.
3 to 5 are cross-sectional views of various embodiments of a dispersion plate for a fluidized bed reactor according to the present invention. .
6 is a perspective view schematically showing another embodiment of a dispersion plate for a fluidized bed reactor and a support for supporting a dispersion plate in a fluidized bed reactor according to the present invention.
7 is a schematic cross-sectional view of a dispersion plate having a wire mesh.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail with reference to the embodiments of the invention shown in the accompanying drawings. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, or alternatives falling within the spirit and scope of the present invention.

In the drawings, like reference numerals are used for similar elements.

The terms first, second, A, B, etc. may be used to describe various components, but the components are not limited by these terms, and may be used to distinguish one component from another Only.

The term " and / or " includes any one or a combination of the plurality of listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it is to be understood that other elements may be directly connected or connected, or intervening elements may be present.

The singular expressions include plural expressions unless otherwise specified.

It will be understood that the terms "comprises", "having", and the like have the same meanings as the features, numbers, steps, operations, elements, parts or combinations thereof described in the specification, Does not exclude the possibility that an operation, component, component, or combination thereof may be present or added.

1 schematically shows the structure of a fluidized bed reactor, which fluidized bed reactor can be used, for example, in the production of carbon nanotubes, but is not limited to the manufacture of carbon nanotubes. Such fluidized bed reactors are useful for the production of carbon nanostructures such as, for example, carbon nanotubes or carbon nanofibers.

Referring to the drawings, a fluidized bed reactor 1 has a reactor body 10, and a lower portion of the reactor body 10 is formed as a tapered region 10a. In order to heat the reactor body 10 to a high temperature, it is preferable that a heater 19 is provided outside the reactor body 10.

A raw material gas supply unit 12 is provided at the bottom of the fluidized bed reactor 1. The raw material gas may be, for example, a hydrocarbon-based gas for producing carbon nanotubes. The raw material gas is supplied to the inside of the reactor main body 10 through a raw material gas supply pipe 21 connected to the raw material gas supply unit 12. The feed gas may be preheated in the preheater 17 before being fed into the reactor body 10. The raw material gas is dispersed into the reaction space in the reactor main body 10 through the dispersing plate 13 by disposing the dispersing plate 13 below the reaction space formed inside the reactor main body 10.

FIG. 1 shows a case where the dispersion plate 13 is provided at the lower end of the tapered region. However, the present invention is not limited to this, and a dispersion plate may be provided by arbitrarily selecting a lower end of the tapered region in accordance with the purpose of gas and solid. have.

On the upper portion of the reactor body 10, a stretching portion 11 is provided. The expander 11 may be provided with a separator (not shown) for preventing the catalyst and the reaction product (for example, carbon nanotube) from being discharged to the outside, for example, from the reactor body 10 . A filter 18 is connected to the elongated portion 11 and the component gas filtered by the filter 18 is conveyed through the conveying pipe 23. On the other hand, a recirculation pipe 22 is connected to the expansion part 11 to recirculate part of the mixed gas discharged from the expansion part 11 to the raw material gas supply pipe 21 through the recirculation pipe 22.

A separator 14 is connected to one side of the upper portion of the reactor main body 10 through a pipe 24. The separator 14 is for separating the product from the mixed gas discharged from the reactor body 10, for example, for separating the mixed gas from the carbon nanotube. A separator 14 is connected to one side of the reactor body 10 through a pipe 15 to collect a product such as carbon nanotubes. On the other hand, the catalyst supplier 16 is connected to the pipe 26 so that the catalyst can be supplied to the inside of the reactor main body 10 through the pipe 26. Although not shown in the drawing, the pipe 26 is provided with a blower so that the mixed gas separated from the separator 14 and the catalyst supplied from the catalyst feeder 16 can be fed into the reactor main body 10.

The dispersion plate 13 provided in the fluidized bed reactor as described above uniformly disperses the raw material gas into the fluidized bed reactor body 10 and the powder produced by the catalyst particles or the reaction drops to the bottom of the fluidized bed reactor . In the gas-solid fluidized bed reactor, when solid particles such as catalyst are placed on the dispersion plate and the reaction gas is blown from the bottom through the holes formed in the dispersion plate 13, the catalyst is supplied to the dispersion plate 13 of the fluidized bed reactor body 10, The reaction occurs while flowing in the upper space.

Referring to Fig. 2, a dispersion plate constructed using metal foams and plates according to the present invention and a support portion for supporting the dispersion plate are shown in a schematic perspective view. The metal foam refers to a cellular structure of a metal material such as aluminum, in which a plurality of vent holes are formed, the vent holes being filled with gas or allowing the flow of gas. The vent holes formed in the metal foams may be sealed to form a closed cell structure, or may be opened while having a network form connected to each other, thereby forming an open cell structure. The metal foams of the open cell structure having the pores allowing the flow of the gas can control the pore size of the pores and can appropriately respond to the particle size of the layer material. Therefore, the properties required by the dispersion plate of the fluidized bed reactor, That is, the property of passing the gas and preventing the passage of the solid particles is excellent. Therefore, in the present invention, a dispersion plate using a metal foam is proposed.

2 is a perspective view schematically showing an embodiment of a dispersion plate for a fluidized bed reactor and a support for supporting a dispersion plate in a fluidized bed reactor according to the present invention.

Referring to the drawing, a plurality of metal foam inserts 75 are formed by using a metal foam, and the metal foam insert 75 is inserted into a plate 70 having a plurality of insertion holes 70a. do. For example, the support 80 is fixed to the inner wall surface of the fluidized bed reactor body, and the plate 70 is supported on the support 80, As shown in FIG. In another embodiment, the plate 70 itself may be secured to the inner wall surface of the fluidized bed reactor body without the use of the support portion 80.

In the example shown in FIG. 2, the metal foam insert 75 may be implemented in various forms. For example, the metal foam insert 75 may have the form of a prismatic cylinder, a truncated cone (i.e., truncated cone), or a hexahedral shape. The insertion port 70a is formed to penetrate through the plate 70 and is formed to correspond to the shape of the metal foam insert 75. [ The upper surface of the metal foam insert 75 and the upper surface of the plate 70 are made flush with each other when the metal foam insert 75 is inserted into the insertion port 70a and the lower surface of the metal foam insert 75 It is preferable that the surface is flush with the lower surface of the plate 70. The plate 70 may be made of, for example, steel or stainless steel, and has a circular shape corresponding to the cross-sectional shape of the reactor body in which the dispersion plate is installed in the illustrated example.

In the dispersion plate constructed as described above, the total area of the dispersion plate plane is the sum of the plane area of the metal foam insert 75 and the plane area of the plate 70 excluding the area of the insertion port 70a. In the actual fluidized bed reactor operation, passage of the raw material gas and passage of the solid particles including the catalyst are prevented through the plane area of the metal foam insert 75, and the area of the plate 70 excluding the area of the insertion port 70a The passage of the raw material gas can not be allowed to pass but the passage of the solid particles can be prevented. Since the area of the plate 70 excluding the area of the insertion port 70a and the plane area of the metal foam insert 75 are in inverse proportion to each other, the area ratio can be determined in consideration of the performance of the fluidized bed reactor. For example, as the plane area of the metal foam insert 75 decreases, the cross-sectional area at which the raw material gas can rise decreases, so that the flow rate of the raw material gas tends to increase to maintain the same flow rate. As a result, the phenomenon that the solid particles such as the catalyst and the powder block the air holes of the metal foam insert 75 is reduced.

3 to 5 show cross-sectional views of embodiments of the dispersion plate according to the present invention.

3, the metal foam insert 75 is formed in a frusto-conical shape, and an insertion port 70a formed in the plate 70 is also formed into a frusto-conical shape corresponding to the metal foam insert 75. As shown in FIG. The metal foam insert 75 can be stably held in the insertion port 70a of the plate 70 without any other fixing means since the metal foam insert 75 has an upper diameter larger than the lower diameter.

Referring to FIG. 4, a flange 77a is formed on the metal foam insert 77. As shown in FIG. Here, the metal foam insert 77 may be conical or prismatic. An insertion port 70c corresponding to the metal foam insertion body 77 is formed in the plate 70. A seating portion 70f corresponding to the flange 77a of the metal foam insertion body 77 is also formed. The flange 77a is seated in the seating portion 70f when the metal foam insertion body 77 is inserted into the insertion port 70c so that the metal foam insertion body 75 is stably held in the insertion opening 70c without any other fixing means .

5, a protrusion 79a is formed on the side surface of the metal foam insert 79, an insertion port 70d is formed on the plate 70, and the metal foam insert 70 A groove 70e corresponding to the projecting portion 79a is formed. Since the metal foam insert 79 has sufficient elasticity in itself, when the metal foam insert 79 is pushed into the insertion port 70d by applying an external force, the protrusion 79a reaches the groove 70e and is expanded Can be contracted at the inner surface of the insertion port 70d.

In another embodiment not shown in the figures, the metal foam insert can be secured to the insert port of the plate in a variety of ways. For example, the metal foams can be fixed by forming a helical line which can be engaged with the insert and the insertion port. In addition, the metal foam insert can be fixed to the insertion port of the plate by using an interference fit method or by using another fixing means.

The dispersion plate described with reference to Figs. 2 to 5 above can be installed and used in a conventional fluidized bed reactor described with reference to Fig. For example, the dispersion plate 13 is removed from the fluidized bed reactor shown in Fig. 1, the support 80 shown in Fig. 2 is fixed to the inner wall surface of the reactor body 10, By arranging the dispersion plate composed of the foam insert 75 and the plate 70, a fluidized bed reactor having a dispersion plate using a metal foam can be realized. A metal foam sheet (not shown) or a wire mesh (not shown) may be disposed on the top of the dispersion plate according to the selection. In another example, the plate 70 may be directly secured to the inner wall surface of the reactor body 10 without the use of a support 80.

6 is a perspective view schematically showing another embodiment of a dispersion plate for a fluidized bed reactor and a support for supporting a dispersion plate in a fluidized bed reactor according to the present invention.

Referring to the drawings, the embodiment shown in Fig. 6 is substantially similar to the example shown in Fig. 2 except for the wire mesh 81. Fig. That is, a plurality of metal foam inserts 75 are formed using a metal foam, and the metal foam insert 75 is inserted into a plate 70 having a plurality of insertion ports 70a, A mesh (81) is disposed on the upper portion of the metal foam insert (75). The dispersion plate further includes the wire mesh 81. The dispersion plate can be disposed in place by supporting the plate 70 on the upper portion of the support 80 fixed inside the body of the fluidized bed reactor. In another embodiment, the plate 70 itself may be secured to the inner wall surface of the fluidized bed reactor body without the use of the support portion 80.

7 is a schematic cross-sectional view of a dispersion plate having a wire mesh.

Referring to the drawing, a metal foam insert 79 is inserted and fixed in the plate 70, and a wire mesh 81 is disposed on the metal foam insert 79. The metal foam insert 79 is similar to that described with reference to Fig. 5, but the metal foam insert described with reference to Figs. 3 and 4 may also be applied, and other types of metal foam inserts may also be used.

10. Reactor body 11. Extension portion
12. Raw gas supply 13. Dispersion plate
21. Raw gas supply pipe 70. Plate
75. Metal foam insert 80. Support

Claims (10)

A plurality of metal foam inserts made of metal foam; And
And a plate having a plurality of insertion ports into which the metal foam inserts are inserted,
When the metal foaming insert is inserted into the insertion port, the upper surface of the metal foaming insert, the upper surface of the plate, the lower surface of the metal foaming insert and the lower surface of the plate are flush with each other,
Wherein the metal foam insert is formed so that passage of the gas through the area of the metal foam insert and blocking of the solid particles are prevented and passage of the gas and the solid particles through the area of the plate except for the insertion port area is performed, plate. The method according to claim 1,
Wherein each of the plurality of metal foam inserts is formed to have one of a cylindrical shape, a truncated cone shape, and a prismatic shape, and each of the plurality of insertion holes is formed to correspond to the shape of the metal foam insert. Dispersion plates for fluidized bed reactors. The method according to claim 1,
Wherein each of the plurality of metal foam inserts is provided with a flange, and each of the plurality of insertion holes is provided with a seating portion on which the flange can be seated. The method according to claim 1,
Wherein a plurality of protrusions are formed on a side surface of each of the plurality of metal foam inserts, and a groove corresponding to the protrusion is formed in each of the plurality of insertion holes. The method according to claim 1,
Wherein each of the plurality of metal foam inserts is threadedly coupled to each of the plurality of insertion ports. The method according to claim 1,
Further comprising a wire mesh disposed on each of the metal foam inserts corresponding to each of the metal foam inserts. A reactor body; And
A plurality of metal foam inserts arranged in a predetermined position inside the reactor body and made of metal foam and a plate having a plurality of insertion holes into which the metal foam inserts are inserted,
When the metal foaming insert is inserted into the insertion port, the upper surface of the metal foaming insert, the upper surface of the plate, the lower surface of the metal foaming insert and the lower surface of the plate are flush with each other,
And a dispersion plate formed on the metal foam insert to prevent passage of gas and solid particles through the area of the metal foam insert and to prevent gas and solid particles from passing through the plate area excluding the insertion hole area Fluidized Bed Reactor. 8. The method of claim 7,
Characterized in that the distributor plate is supported by a support fixed within the reactor body. 9. The method according to claim 7 or 8,
Characterized in that a metal foam sheet or wire mesh is disposed on the top of the dispersion plate. 9. The method according to claim 7 or 8,
Characterized in that a metal foam sheet and a wire mesh are disposed on top of the dispersion plate.

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