A decoking catalytic reaction device for hydrogen generation

Abstract

The present invention relates to a catalytic reaction apparatus for producing hydrogen by reacting with a raw material fluid containing hydrocarbons. A decoking catalyst reaction device for hydrogen generation according to the present invention comprises a reaction chamber into which a raw material containing hydrocarbons is introduced, a decoking cylinder configured to be rotatable inside the reaction chamber and containing a metal catalyst that reacts with the introduced raw material, and a rotary drive unit for transmitting rotational force to the decoking cylinder. The decoking cylinder is arranged to be concentric with the reaction chamber and rotates while spaced apart from the inner wall of the reaction chamber, thereby reducing carbon deposition by surface friction between the inner surface of the cylinder body and the metal catalyst contained therein, or by surface friction between the metal catalysts. According to the present invention, physical peeling (decoking) of deposited carbon is promoted during the initial carbon growth stage of the hydrogen generation process, thereby reducing the carbon deposition rate.

Description

Technology Field

[0001] The present invention relates to a catalytic reaction apparatus for producing hydrogen by reacting with a raw material fluid containing hydrocarbons. Background Technology

[0003] As shown in Fig. 1, in catalytic reaction systems for hydrogen production according to the prior art, a method of producing hydrogen by supplying a hydrocarbon feedstock gas containing methane to a catalytic reaction device is widely used, and in this regard, various processes such as methane steam reforming (SMR), methane pyrolysis, partial oxidation reaction (POX), and autothermal reforming (ATR) have been proposed and utilized.

[0004] However, the aforementioned processes commonly suffer from a coking problem in which the activity of the catalyst is reduced by solid carbon or coke generated during the reaction process, and a decoking process is essential to resolve this.

[0005] Meanwhile, conventional decoking technologies mainly utilize steam decoking, which oxidizes and removes coke using high-temperature steam; chemical decoking, which uses oxidizers or chemicals; and offline decoking, which is performed while the equipment is shut down.

[0006] However, since the above steam decoking method is performed in a high-temperature oxidizing atmosphere, oxidation and sintering of the catalyst may occur, and there is a problem of accumulated structural damage to the catalyst upon repeated execution.

[0007] In addition, the aforementioned chemical decoking method requires the selection and management of chemicals corresponding to specific coke components, which increases maintenance costs and may lead to problems such as carrier erosion or catalyst degradation caused by residual chemicals.

[0008] Furthermore, the aforementioned offline decoking method has the disadvantage of reduced productivity due to reactor shutdown and the requirement for long-term maintenance.

[0009] Meanwhile, the conventional technology described above primarily recognizes the coking problem only in terms of reduced catalyst activity; however, as the reaction continues and the amount of carbon deposited on the catalyst surface increases, it leads to a problem where the mechanical strength of the catalyst weakens beyond the issue of reduced catalyst activity.

[0010] Referring to Figure 2, catalytic activity can be maintained due to underdeveloped surface carbon in the early stages of the reaction, but as the reaction continues, filamentous coke grows on the catalyst surface, and as this filamentous coke continues to grow starting from the catalyst metal particles, it causes mechanical stress on the catalyst particles and the support.

[0011] Furthermore, the growth and clustering of such filamentous coke leads to microcracks in the catalyst particles, a decrease in the bonding force between the carrier and the metal particles, and instability of the catalyst structure, eventually progressing to the stage where it grows into bulk coke and encapsulates the catalyst.

[0012] As described above, once bulk coke growth is reached, even if a decoking process is performed to remove the coke, the compressive strength and structural stability of the catalyst have already deteriorated, making it difficult to reuse the catalyst and causing problems such as catalyst pulverization, breakage, or increased pressure drop within the reactor.

[0013] Consequently, while conventional decoking technology can contribute to some extent to the removal of coke formed on the catalyst surface, it has limitations in that it cannot fundamentally prevent the reduction in mechanical strength and structural deterioration of the catalyst that occurs when the carbon deposition rate is high. As a result, long-term reuse is difficult even after repeated decoking, leading to catalyst replacement or disposal, which causes problems such as increased process operating costs and reduced productivity. Prior art literature

[0015] (Patent Document 0001) KR 10-2024-0125900 A(Patent Document 0002) KR 10-2023-0137565 A(Patent Document 0003) KR 10-2293312 B1

[0016] Steam Reforming of Tar Impurities from Biomass Gasification with Ni-Co / Mg(Al)O Catalysts?Operating Parameter Effects, Ask Lysne, Ida Saxrud, Kristin Ø. Madsen and Edd A. Blekkan, Fuels 2024, 5, PP.458-475 The problem to be solved

[0017] The objective of the present invention is to provide a decoking catalyst reaction device for hydrogen generation that enables the repeated reuse of a metal catalyst by inducing physical peeling by friction during the initial stage of carbon growth occurring in the hydrogen generation process.

[0018] Another objective of the present invention is to provide a decoking catalyst reaction device for hydrogen generation that rotates synchronously by a magnetic field and a rotary drive unit having a decoking cylinder provided outside the reaction chamber to generate frictional behavior of a metal catalyst.

[0019] Another objective of the present invention is to provide a decoking catalyst reaction apparatus for hydrogen production in which the temperature distribution inside a horizontally positioned reaction chamber can be homogenized by the rotation of a decoking cylinder. means of solving the problem

[0021] A decoking catalyst reaction device for hydrogen generation according to the present invention comprises a reaction chamber into which a raw material containing hydrocarbons is introduced, a decoking cylinder configured to be rotatable inside the reaction chamber and containing a metal catalyst that reacts with the introduced raw material, and a rotary drive unit for transmitting rotational force to the decoking cylinder, wherein the decoking cylinder is arranged to be concentric with the reaction chamber and rotates while spaced apart from the inner wall of the reaction chamber, thereby reducing carbon deposition by surface friction between the inner surface of the cylinder body and the metal catalyst contained therein, or by surface friction between the metal catalysts.

[0022] The above-described rotary drive unit is characterized by comprising: a drive motor provided outside the reaction chamber to generate rotational force; a drive shaft magnetic plate coaxially coupled with the drive motor outside the reaction chamber; a driven shaft magnetic plate provided inside the reaction chamber to rotate by magnetic force while physically separated from the drive shaft magnetic plate; and a rotary shaft that connects the driven shaft magnetic plate to a decoking cylinder to enable synchronous rotation.

[0023] The reaction chamber further includes an insulating plate provided between the driven shaft magnetic plate and the decoking cylinder, and a guide bushing provided at the end of the rotating shaft to support the rotational drive of the decoking cylinder, wherein the driven shaft magnetic plate, the decoking cylinder, the insulating plate, and the guide bushing are connected to the rotating shaft and are characterized by being withdrawn together when the guide bushing is withdrawn outside the reaction chamber.

[0024] The above reaction chamber is further characterized by being equipped with an insulating plate to protect the rotary drive unit when heating the reaction space of the metal catalyst contained in the decoking cylinder.

[0025] The reaction chamber is further provided with a carbon recovery tray located at the bottom of the decoking cylinder to collect deposited carbon separated by friction, and the insulating plate is mounted on the carbon recovery tray.

[0026] The cylinder body constituting the decoking cylinder is characterized by having a hole formed with a size smaller than that of the metal catalyst to form a perforated portion, and the metal catalyst is filled to a level of 60% to 85% of the volume of the decoking cylinder. Effects of the invention

[0028] In the present invention, as the decoking cylinder rotates inside the reaction chamber, the metal catalyst frictionally contacts the inner surface of the cylinder body and the perforations, and surface friction is induced between the metal catalysts, thereby promoting the physical peeling (decoking) of deposited carbon during the initial stage of carbon growth in the hydrogen generation process, which can reduce the carbon deposition rate.

[0029] Accordingly, according to the present invention, as the carbon deposition rate increases, the accumulation of mechanical strength degradation, such as microcracks or breakage of the metal catalyst, can be suppressed, thereby providing the advantage of improving the reusability of the metal catalyst even after repeated operation and decoking.

[0030] In addition, since the driving motor outside the reaction chamber and the driven magnetic plate inside rotate synchronously by magnetic force to transmit rotational force, the present invention enables operation without mechanical penetrations while maintaining the airtight structure of the reaction chamber, thereby improving airtightness reliability and operational stability even in high-temperature hydrocarbon and hydrogen atmospheres.

[0031] In addition, by providing an insulating plate inside the reaction chamber to shield the propagation of the heating means and reaction heat to the driven magnetic plate, it has the advantage of reducing the possibility of magnetic field degradation (magnetic destruction) of the driven magnetic plate and improving the durability of the rotary drive unit.

[0032] In addition, the present invention has a carbon recovery tray positioned at the bottom of the decoking cylinder so that deposited carbon separated by friction is immediately collected, thereby suppressing the reattachment or regrowth of carbon inside the reaction chamber. Furthermore, since the driven magnetic plate, decoking cylinder, insulation plate, and guide bushing are configured as a pull-out structure connected by a rotation axis, internal components can be pulled out together through the guide bushing after the reaction chamber door is opened, thereby simplifying maintenance tasks such as catalyst replacement and carbon recovery tray cleaning, which can improve maintenance convenience and work efficiency. Brief explanation of the drawing

[0034] Figure 1 is a schematic diagram illustrating the configuration of a typical hydrogen extraction system. FIG. 2 is a diagram for showing various types of coke formation and the effect of the formed coke on the catalyst step by step. FIG. 3 is a schematic diagram of a decoking catalyst reactor for hydrogen generation according to the present invention. FIG. 4 is a drawing showing a reaction chamber and a rotary driving unit according to an embodiment of the present invention. Fig. 5 is an exploded view of Fig. 4. FIG. 6 is a cross-sectional view of section AA of FIG. 4. FIG. 7 is a photograph showing the appearance of a rotary drive unit according to one embodiment of the present invention. FIG. 8 is a photograph showing one embodiment of a decoking cylinder, which is a main component of the present invention. FIG. 9 is a photograph showing an example of a heating means applied to the embodiment illustrated in FIG. 7. FIG. 10 is a photograph showing the carbon recovery tray being withdrawn out of the reaction chamber along with the decoking cylinder in the embodiment illustrated in FIG. 7. FIG. 11 is a drawing illustrating a decoking structure by catalyst surface friction in a decoking catalyst reaction apparatus for hydrogen generation according to the present invention. FIG. 12 is a drawing showing an image of the heat distribution inside the reaction chamber due to the inflow of raw material fluid (a) and an example of a heating section for improving the heat distribution (b). FIG. 13 is a drawing showing a parallel connection structure of a decoking catalyst reactor for hydrogen generation according to the present invention. Specific details for implementing the invention

[0035] The present invention provides a catalytic reaction apparatus for generating hydrogen using a chemical reaction between a source gas and a metal catalyst, characterized in that carbon deposition can be reduced while preventing a decrease in the mechanical strength of the metal catalyst during the initial stage of carbon growth that occurs during the hydrogen generation process.

[0036] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In assigning reference numerals to the components of each drawing, the same components are denoted by the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in the description of the embodiments, if it is determined that a specific description of related known configurations or functions would hinder understanding of the embodiments of the present invention, such description has been simplified or omitted. Where it is stated that a component is “provided,” “placed,” and “fixed” on the upper side of another component, it should be understood that the component may be directly provided, stacked, or fixed on the upper surface of the other component, but that another component may also be “provided,” “placed,” and “fixed” between each component.

[0037] FIG. 3 shows a schematic diagram of a decoking catalyst reaction apparatus for hydrogen generation according to the present invention, FIG. 4 shows a diagram of a reaction chamber and a rotary driving unit according to an embodiment of the present invention, FIG. 5 shows an exploded perspective view of FIG. 4, and FIG. 6 shows a cross-sectional view of section AA of FIG. 4.

[0038] Referring to this, the decoking catalyst reaction device for hydrogen generation according to the present invention includes a reaction chamber (200) into which a raw material containing hydrocarbons is introduced, a decoking cylinder (400) which is rotatably provided inside the reaction chamber (200) and contains a metal catalyst (700) that reacts with the introduced raw material, and a rotary drive unit (300) for transmitting rotational force to the decoking cylinder (400).

[0039] The reaction chamber (200) is formed in a cylindrical shape of a predetermined length and volume and includes a raw material inlet (240) into which a raw material fluid is introduced and a hydrogen discharge part (260) into which hydrogen generated inside is discharged.

[0040] In addition, the rotary drive unit (300) is provided on one side of the reaction chamber (200), and the side of the reaction chamber adjacent to the rotary drive unit (300) is formed integrally with the chamber body (210, see FIG. 13) and shielded to form a hermetic structure. On the other hand, the other side is open for the entry and exit of internal components including the decoking cylinder (400), and a door (290) that can be opened and closed is further provided so that the internal space of the reaction chamber (200) can be selectively shielded.

[0041] The above rotary drive unit (300) is formed by including a drive motor (320) and a pair of magnetic plates.

[0042] In detail, the drive motor (320) is provided outside the reaction chamber (200), and a drive-side magnetic plate (340) is coupled to the motor shaft.

[0043] That is, the driving side magnetic plate (340) is configured to rotate together with the driving motor (320) outside the reaction chamber (200) and is positioned adjacent to one side of the reaction chamber (200).

[0044] In addition, a driven magnetic plate (360) is provided inside the reaction chamber (200) and is housed on one side that is shielded, and forms a magnetic field together with the driving magnetic plate (340) to transmit rotational force.

[0045] That is, the rotary drive unit (300) enables rotational force generated outside the reaction chamber (200) to be transmitted into the reaction chamber (200) without mechanical connection, thereby allowing rotational force to be transmitted while maintaining airtightness.

[0046] Meanwhile, a rotation shaft (380) for transmitting rotational force to the decoking cylinder (400) is connected to the driven magnetic plate (360) which is rotatably provided as described above.

[0047] The above-mentioned rotating shaft (380) may be formed from one or more of a nickel-chromium-based high-heat-resistant alloy, a ceramic-coated metal, or a silicon carbide-based material so as to maintain mechanical strength even in a high-temperature hydrocarbon and hydrogen atmosphere, and so that the metal catalyst (600) particles are not crushed or degraded when in contact with the metal catalyst (600).

[0048] Additionally, one end of the rotation shaft (380) is connected to the driven shaft magnetic plate (360), and the other end is connected to a guide bushing (280) for supporting the rotation shaft (380) at a location adjacent to the door (290).

[0049] The guide bushing (280) includes a bearing to assist in the smooth rotation of the connected rotating shaft (380), and further includes a support plate with an area corresponding to the vertical cross-section of the reaction chamber (200) so that the rotating shaft (380) is supported at a certain height and stable rotation is possible.

[0050] Meanwhile, the decoking cylinder (400) is configured to rotate by being mounted on a rotating shaft (380) as described above, and may accommodate a metal catalyst (700) for generating hydrogen by reacting with a raw material fluid introduced into the internal space.

[0051] Accordingly, when a decoking cylinder (400) containing a metal catalyst (700) is mounted on the above-mentioned rotating shaft (380), sagging of the rotating shaft (380) may occur due to the load.

[0052] In addition, to improve the reaction efficiency of the metal catalyst (600) contained inside the decoking cylinder (400), a heating means (500) may be further provided in the part where the decoking cylinder (400) is installed, and the heat generated from the heating means (500) and the chemical reaction process may degrade or eliminate the magnetic field of the driven magnetic plate (360).

[0053] Accordingly, in the present invention, insulation plates (220) are further provided at positions spaced apart from both ends of the decoking cylinder (400) by a predetermined distance so as to prevent sagging of the rotation shaft (380) and prevent degaussing.

[0054] In detail, the insulation plate (220) is formed with an area corresponding to the vertical cross-sectional area of ​​the reaction chamber (200) and is provided at both ends of the decoking cylinder (400), and the installation location can be determined by considering the inflow path of the raw material fluid and the discharge path of the generated hydrogen.

[0055] That is, one side insulation plate (220) for shielding heat propagated to the driven side magnetic plate (360) is provided between the driven shaft magnetic plate (360) and the raw material inlet (240), and the other side is provided between the guide bushing (280) and the hydrogen discharge part (260) to form an insulation structure.

[0056] In addition, the insulation plate (220) can be formed of a material that is inactive to catalytic reactions and effectively blocks heat transfer even in high-temperature environments.

[0057] For example, the insulation plate (220) may be formed of alumina, zirconia, silicon carbide, or a composite structure thereof, and may be fixedly installed on the rotating shaft (380) to distribute and support the load of the rotating shaft (380).

[0058] Meanwhile, inside the reaction chamber (200), a carbon recovery tray (600) is further provided on the lower side of the decoking cylinder (400) to recover carbon separated from the surface of the metal catalyst (700).

[0059] The carbon recovery tray (600) is formed in a pipe shape that is cut to correspond to the inner lower shape of the reaction chamber (200), and can be formed with a length that connects the insulation plates (220) or a length that accommodates the insulation plates (220) inside.

[0060] That is, both ends of the carbon recovery tray (600) may be installed in a structure joined to one side of the insulation plate (220), or may be formed in a form in which a receiving portion for the insulation plate (220) is provided inside the carbon recovery tray (600).

[0061] In addition, the carbon recovery tray (600) can also be formed from a material that is inert to catalytic reactions and suitable for high-temperature environments, and, like the insulation plate (220), can be formed from alumina, zirconia, silicon carbide, or a composite structure thereof.

[0062] Meanwhile, FIG. 7 shows a photograph of a rotary drive unit according to one embodiment of the present invention, and FIG. 8 shows a photograph of one embodiment of a decoking cylinder, which is a main component of the present invention.

[0063] Referring to this, if we examine the rotary drive unit (300), which is a main component of the present invention, through an example, the driven magnetic plate (360) housed inside a shielded end inside the reaction chamber (200) and the driving magnetic plate (340) connected to the drive motor (320) outside the reaction chamber (200) and rotating are required to be maintained in a fixed state at the same height and adjacent position so that the influence of the magnetic field can be exerted.

[0064] Accordingly, in this embodiment, the drive motor (320) is mounted on a position adjustment means (320) capable of vertical movement and left-right position adjustment, so that the drive-side magnetic plate (340) can be position-adjusted to correspond to the driven-side magnetic plate (360).

[0065] Additionally, the driving magnetic plate (340) and the driven magnetic plate (360), positioned as described above, can be fixed with a connecting clamp so that they can be maintained in a fixed position. To this end, the driving magnetic plate (340) can be housed inside a casing while connected to the motor shaft of the driving motor (320), and the casing and the reaction chamber (200) can be fixed with a connecting clamp.

[0066] Meanwhile, the rotational force of the above-mentioned drive motor is transmitted to the rotation shaft (380) through the drive-side magnetic plate (340) and the driven-side magnetic plate (360) to rotate the decoking cylinder (400), and the metal catalyst (700) contained inside the decoking cylinder (400) is collected by the carbon recovery tray (600) provided on the lower side after the deposited particles initially formed on the surface during the hydrogen generation process are separated by friction.

[0067] To this end, the decoking cylinder (400) comprises a cylindrical cylinder body (420) and a cylinder cover (440) that shields both ends of the cylinder body (420), and the cylinder body (420) has a perforated section (422) formed with a uniformly formed perforated hole having a diameter smaller than the diameter of the metal catalyst (700) contained therein.

[0068] That is, the perforated portion (422) has a diameter such that a portion of the metal catalyst (700) can be accommodated, so that when the decoking cylinder (400) rotates, the surface of the metal catalyst (700) can be more effectively frictionally rubbed by the perforated portion (422). Additionally, a plurality of flow holes (442) may be further formed in the cylinder cover (440) to facilitate the smooth flow of the raw material fluid.

[0069] When a metal catalyst (700) is contained inside a decoking cylinder (400) having the structure as described above, the decoking cylinder (400) is rotated by the rotary drive unit (300) and the raw material fluid and the metal catalyst (700) react. At this time, a heating means (500) is further provided on the outside of the reaction chamber (200) to improve the reaction efficiency.

[0070] FIG. 9 is a photograph showing an example of a heating means applied to an embodiment illustrated in FIG. 7. In this embodiment, the heating means (500) can be applied in the form of a furnace with an openable and closable structure that covers the entire portion of the decoking cylinder (400) provided between the insulation plates (220).

[0071] That is, the heating means (500) is composed of a seating portion in which the lower part of the reaction chamber (200) is received, and a shielding portion that completely shields the upper part of the reaction chamber (200) received in the seating portion, and a decoking cylinder (400) rotatably provided inside the reaction chamber (200) is installed in correspondence with the internal space formed by the shielding portion and the seating portion.

[0072] Additionally, at least a portion of the insulation plate (220) may be disposed together with the decoking cylinder (400) in the internal space formed by the heating means (500).

[0073] Accordingly, the portion of the reaction chamber (200) in which the decoking cylinder (400) is housed forms an insulating structure by the heating means (500) and the insulating plate (220) and operates as a heating section (400A, see FIG. 13), and the remaining portion of the reaction chamber (200) exposed to the outside of the heating means (500) is divided into an insulating section (220A) by the insulating plate (220) so that the efficiency of the heating means (500) and the thermal effect on the surroundings can be blocked.

[0074] Meanwhile, FIG. 10 shows a photograph of the carbon recovery tray being withdrawn out of the reaction chamber along with the decoking cylinder in the embodiment illustrated in FIG. 7.

[0075] Referring to this, the decoking catalyst reaction device for hydrogen generation according to the present invention is equipped with a driven magnetic plate (360), a decoking cylinder (400), an insulating plate (220), and a guide bushing (280) on a rotating shaft (380) as described above.

[0076] In addition, the carbon recovery tray (600) provided on the lower side of the decoking cylinder (400) is formed in a shape that connects the insulation plates (220) or partially accommodates the lower part of the insulation plates (220) as described above, so that when the door (290) provided on the other side of the reaction chamber (200) is opened and the guide bushing (280) is pulled, all components provided inside the reaction chamber (200) can be pulled out together.

[0077] That is, when the user pulls the guide bushing (280), the insulation plate (220), the carbon recovery tray (600), the decoking cylinder (400), and the driven magnetic plate (360) are all pulled out together. When inserting, the connection structure is retracted in the same way as when pulled out, so that installation can be completed, making it easier to replace parts or perform cleaning work.

[0078] Meanwhile, in the catalytic reaction device for hydrogen generation according to the present invention, the metal catalyst (700) contained within the decoking cylinder (400) enables decoking by friction to occur during the initial stage of carbon growth that occurs during the hydrogen generation process by the rotation of the decoking cylinder (400).

[0079] In this regard, FIG. 11 illustrates a diagram for explaining the decoking structure by catalyst surface friction in a decoking catalyst reaction apparatus for hydrogen generation according to the present invention.

[0080] First, the metal catalyst (700) contained inside the decoking cylinder (400) can be formed in a globular shape or a cylindrical shape and can be formed based on nickel (Ni), iron (Fe), cobalt (Co), etc. and can be filled in a range of 60% to 85% of the volume of the decoking cylinder (400).

[0081] The above-mentioned filling rate allows the metal catalyst (700), formed in a spherical or cylindrical shape, to roll without tumbling and remove the coke formed on the surface due to shear friction.

[0082] In detail, when generating hydrogen, the filling rate of the raw material fluid and the metal catalyst (700) improves as it increases in terms of reaction efficiency.

[0083] However, the metal catalyst (700) that is overfilled with more than 85% forms a plug flow that rotates as one mass together with the decoking cylinder (400).

[0084] Therefore, the relative movement and friction between the metal catalysts (700) are significantly reduced, making it difficult to separate the coke formed on the surface. If hydrogen production continues in this state, the metal catalyst (700) with a high carbon deposition rate will experience a decrease in mechanical strength and structural deterioration.

[0085] On the other hand, if the filling rate of the metal catalyst (700) is less than 60%, the idle space inside the decoking cylinder (400) increases, and when rotating, the frequency of the metal catalysts (700) rising high and colliding increases, and as the impact acts along with friction, the probability of the metal catalyst (700) breaking increases.

[0086] Accordingly, in order to induce reaction efficiency and stable surface friction of the metal catalyst (700), the filling rate is limited to 60% or more and 85% or less, and the decoking cylinder (400) is rotated at a low speed so that friction between the metal catalysts, as well as friction between the metal catalysts and the cylinder body (420) and the perforated part (422), can occur.

[0087] Meanwhile, FIG. 12 shows an image (a) of the heat distribution inside the reaction chamber due to the inflow of raw material fluid and an example (b) of a heating section for improving the heat distribution.

[0088] Referring to this, when a raw material fluid flows into a horizontally arranged reaction space, the temperature at the inlet where the fluid flows in is relatively low, while the temperature in the center where an active hydrogen generation reaction occurs is high. Even within the center, a large temperature difference occurs between the upper and lower parts, resulting in an uneven temperature distribution. (See Fig. 12a)

[0089] Accordingly, in the present invention, an induction heating coil is applied as another form of the heating means (500), and a heat distribution improvement wing (420) is further added to the rotating shaft to generate flow inside the reaction chamber (200) so that the heat distribution can be formed uniformly.

[0090] In addition, in this embodiment, the insulation plate (220), the rotating shaft (380), and the carbon recovery tray (600) may be formed of a non-magnetic or low-conductivity metal such as stainless steel so that the induction heating of the remaining components, excluding the metal catalyst (700), can be limited as the heating means (500) is formed as an induction heating coil.

[0091] Meanwhile, the decoking catalyst reaction device for hydrogen generation according to the present invention can be connected in multiple units to enable the production of a larger amount of high-purity hydrogen.

[0092] In this regard, FIG. 13 shows a parallel connection structure of a decoking catalyst reactor for hydrogen generation according to the present invention.

[0093] First, referring to FIG. 13a, in the parallel structure decoking catalyst reaction device according to the present embodiment, a plurality of flow path forming holes (212) are formed in the chamber body (210) constituting the reaction chamber (200) described above, and a connecting pipe (214) or a plug (216) is installed in the flow path forming holes (212) as needed.

[0094] That is, the above connecting pipe (214) can be installed to provide a path for supplying raw material fluid into the interior of the chamber body (210) or for discharging hydrogen generated by a catalytic reaction to the outside.

[0095] The plug (216) is intended to cover an unused flow path forming hole (212) among the flow path forming holes (212) formed in the chamber body (210), and can be fastened by a press fit method to maintain airtightness or can be firmly mounted using a washer or sealing member.

[0096] And, as shown in FIG. 13b, when the first decoking catalyst reaction device (120), the second decoking catalyst reaction device (140), and the third decoking catalyst reaction device (160) are connected and operated, a connecting pipe (214) is installed in the part where a flow path is to be formed while all are arranged side by side in the same direction, and a plug (216) can be installed in the shielding part.

[0097] Accordingly, when a raw material fluid is introduced into the raw material inlet (240) formed in the first decoking catalyst reaction device (120), it passes through all three decoking cylinders as shown in FIG. 13b and a catalytic reaction occurs, thereby enabling more stable production of a larger amount of high-purity hydrogen.

[0098] Meanwhile, in this embodiment, as the flow path of the reaction fluid is formed through the installation position of the plug (216) and the connecting pipe (214) of each decoking catalyst reaction device (120, 140, 160) arranged in parallel, the rotary drive unit of each decoking catalyst reaction device (120, 140, 160) is located in the same direction, and together with this, the position of the door (290) for opening and closing the internal space of the reaction chamber can also be formed in the same direction.

[0099] Therefore, even if a work situation such as cleaning occurs in any of the interconnected decoking catalyst reaction devices (120, 140, 160), it is possible to respond in the same direction for all of them, so maintenance can be performed more easily even in a parallel arrangement structure.

[0100] The above description is merely an example of a decoking catalyst reaction apparatus for hydrogen generation according to the present invention. The present invention is not limited to the above-described examples, and the technical spirit of the present invention extends to the scope in which any person with ordinary knowledge in the technical field to which the present invention belongs can implement it by making various modifications without departing from the gist of the invention as claimed in the following claims. Explanation of the symbols

[0102] 200........ Reaction chamber 220........ Insulation plate 240........ Raw material inlet 260........ Hydrogen discharge section 300........ Rotary drive unit 320........ Drive motor 340........ Driving side magnetic plate 360........ Driven side magnetic plate 380........ Rotation axis 400........ Decoking cylinder 420........ Cylinder body 422........ Perforation part 500........ Heating means 600........ Carbon recovery tray 700........ metal catalyst

Claims

Claim 1 A decoking catalyst reaction device for hydrogen generation comprising: a reaction chamber into which a raw material containing hydrocarbons is introduced; a decoking cylinder configured to be rotatable inside the reaction chamber and containing a metal catalyst that reacts with the introduced raw material; and a rotary drive unit for transmitting rotational force to the decoking cylinder; wherein the decoking cylinder comprises a cylinder body having a plurality of perforations formed with a diameter smaller than that of the metal catalyst, and is arranged to be concentric with the reaction chamber and rotates while spaced apart from the inner wall of the reaction chamber, and the metal catalyst, which undergoes rolling motion by the rotation of the decoking cylinder, generates shear friction as its surface comes into contact with the perforations to detach carbon deposits, and the detached carbon is discharged to the outside of the decoking cylinder through the perforations. Claim 2 A decoking catalyst reaction device for hydrogen generation according to claim 1, wherein the rotary drive unit comprises a drive motor provided outside the reaction chamber to generate rotational force, a drive shaft magnetic plate coaxially coupled with the drive motor outside the reaction chamber, a driven shaft magnetic plate provided inside the reaction chamber to rotate by magnetic force while physically separated from the drive shaft magnetic plate, and a rotary shaft that connects the driven shaft magnetic plate and a decoking cylinder to rotate synchronously. Claim 3 A decoking catalyst reaction device for hydrogen generation according to claim 2, wherein the reaction chamber further comprises an insulating plate provided between the driven shaft magnetic plate and the decoking cylinder and a guide bushing provided at the end of the rotating shaft to support the rotational drive of the decoking cylinder, and wherein the driven shaft magnetic plate, the decoking cylinder, the insulating plate and the guide bushing are connected to the rotating shaft and are withdrawn together when the guide bushing is withdrawn outside the reaction chamber. Claim 4 A decoking catalyst reaction device for hydrogen generation according to claim 1, characterized in that the reaction chamber further comprises an insulating plate for protecting the rotary drive unit when heating the reaction space of the metal catalyst contained in the decoking cylinder. Claim 5 A decoking catalyst reaction device for hydrogen generation according to claim 3, wherein the reaction chamber further comprises a carbon recovery tray provided at the bottom of the decoking cylinder for collecting deposited carbon separated by friction, and the insulating plate is mounted on the carbon recovery tray. Claim 6 delete

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