A heat exchange device for reforming hydrogen production

Abstract

The present invention discloses a heat exchange device for reforming hydrogen production, comprising: a first heat exchange module, comprising a barrel-shaped shell and a heat exchange tube, the first port of the shell being a first medium inlet, the second port of the heat exchange tube passing through the bottom of the shell and being constructed as a second medium outlet; a second heat exchange module, being an annular structure and being sleeved on the outside of the first heat exchange module, the second heat exchange module comprising a plurality of tubular plates, a first medium space and a second medium space alternately formed between the tubular plates, and a first medium outlet and a second medium inlet respectively connected to the first medium space and the second medium space; a first connecting structure connecting a heat exchange cavity and the first medium space is constructed between the second end of the first heat exchange module and the second end of the second heat exchange module, and a second connecting structure connecting the first port of the heat exchange tube and the second medium space is constructed between the first end of the first heat exchange module and the first end of the second heat exchange module.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and in particular to a heat exchange device for reforming hydrogen production. Background Art

[0002] Energy is the most crucial element in human economic activity. Hydrogen, a recognized clean energy source, is emerging as a low-carbon and zero-carbon energy source in today's society. As a new energy fuel, hydrogen presents a vast and potentially vast market. Preparing for and embracing this inevitable development through planning and technology is a matter of paramount importance. Selecting advanced technologies and rational methods for hydrogen production and application to maximize economic and environmental benefits is the future trend.

[0003] At present, methanol is widely used to produce hydrogen. Methanol hydrogen production refers to the process of producing hydrogen under certain temperature and pressure conditions, using methanol as raw material, through the action of methanol vapor through the action of hydrogen production catalyst, to carry out conversion reaction. In the prior art, the method of reusing the mixed gas after the reaction of methanol vapor and hydrogen production catalyst with air by combustion catalysis effectively reduces the loss of resources. However, when the existing equipment uses tail gas combustion to produce hydrogen, it is necessary to first produce steam through a steam generating device, and then pass the steam into a hydrogen reaction device to react with a hydrogen production catalyst to produce hydrogen. Its structure is complex, and it is necessary to separately set up a steam generating device, a hydrogen reaction device, and a connecting pipe between the two, etc., resulting in a large overall volume of the device and low overall efficiency, leaving room for improvement. Summary of the Invention

[0004] The present invention aims to overcome the above-mentioned defects in the prior art and provides a heat exchange device for reforming hydrogen production, which cleverly and compactly combines a second heat exchange module for preparing steam and a first heat exchange module for reaction hydrogen production, effectively reducing the overall volume of the device; at the same time, it also effectively extends the flow path of the first medium and the second medium, effectively improving the overall heat exchange effect of the device, thereby improving the hydrogen production efficiency and reducing the energy consumption of hydrogen production.

[0005] To achieve the above objectives, the present invention provides a heat exchange device for reforming hydrogen production, comprising:

[0006] A first heat exchange module comprises a barrel-shaped shell having a heat exchange cavity, and a plurality of heat exchange tubes axially extending in the heat exchange cavity, wherein a first end port of the shell is an open structure and is configured as a first medium inlet, and a second end port of the shell is a closed structure having a bottom, and the second ends of the plurality of heat exchange tubes extend through the bottom of the second end of the shell and are configured as second medium outlets;

[0007] The second heat exchange module has an annular structure and is mounted outside the first heat exchange module. The second heat exchange module includes a plurality of cylindrical plates that are nested and connected at intervals. The first medium spaces and the second medium spaces are alternately arranged between the adjacent cylindrical plates of the second heat exchange module. The first medium spaces of the second heat exchange modules are connected to each other for the flow of the first medium, and the second medium spaces of the second heat exchange modules are connected to each other for the flow of the second medium.

[0008] The first heat exchange module is also provided with a first medium outlet connected to the first medium space, and a second medium inlet connected to the second medium space;

[0009] A first connecting structure for connecting the heat exchange cavity and the first medium space is constructed between the second end of the first heat exchange module and the second end of the second heat exchange module, and a second connecting structure for connecting the first end port of the heat exchange tube and the second medium space is constructed between the first end of the first heat exchange module and the first end of the second heat exchange module.

[0010] It is further configured that: the second heat exchange module further includes blocking covers located at both axial ends, and the two blocking covers are constructed at both axial ends of the second heat exchange module to form a collecting and distributing cavity connected to the first medium space or the second medium space.

[0011] It is further configured that: the blocking cover is an annular cover structure, and the inner edge and outer edge of the cover are respectively sealedly connected to the innermost cylindrical plate and the outermost cylindrical plate;

[0012] Alternatively, the plugging cover is an annular plate structure, and the two ends of the outermost cylindrical plate and the two ends of the shell both protrude from the two ends of the cylindrical plate located between them, and the plugging cover is sealed and arranged between the inner wall of the outermost cylindrical plate and the outer wall of the shell.

[0013] It is further configured that: the collecting and distributing cavity is connected to another medium space different from the innermost medium space, and at least one first straight-through channel is provided at one end of the corresponding axial direction between the cavity wall of the collecting and distributing cavity and the cavity wall of the heat exchange cavity;

[0014] At least one second straight-through channel is provided between the cavity wall of the innermost medium space and the cavity wall of the heat exchange cavity at the other end corresponding to the axial direction.

[0015] It is further configured as follows: a connecting component is provided in the first end port of the shell, the connecting component includes a ring body, a plurality of cover bodies located in the ring body, and a plurality of connecting arms for connecting the ring body and the cover bodies, the ring body is correspondingly arranged on the inner wall of the heat exchange cavity and the ring body is correspondingly provided with a notch that is docked and connected with the port of the straight channel, the number of the cover bodies is the same as the number of the heat exchange tubes and they are correspondingly covered on the first end ports of the heat exchange tubes, and a connecting channel for connecting the notch and the cover body is constructed in the connecting arm.

[0016] It is further configured that: the second heat exchange module includes a first supporting structure and a second supporting structure alternately arranged between adjacent cylindrical plates so that the cylindrical plates are arranged at intervals, and the second supporting structure also blocks the axial ends of the corresponding medium space to block the communication with the collecting and distributing cavity.

[0017] It is further configured as follows: the first supporting structure includes at least one supporting block, the supporting block is sealed and connected to the cylindrical plates on both sides, a connecting hole is provided on the supporting block, and the cylindrical plates on both sides are provided with through holes that are connected to the connecting holes on the supporting block.

[0018] It is further configured that: the second supporting structure includes two supporting ring structures, and the two supporting rings are respectively arranged between the two ends of the cylindrical plate to block the communication between the corresponding medium space and the collecting and distributing cavity.

[0019] It is further configured that: the second supporting structure further includes a plurality of dividing strips connected between the two supporting rings, and the plurality of dividing strips divide the corresponding medium space into a plurality of chambers.

[0020] It is further configured that: several interfering flow plates are provided in the heat exchange cavity.

[0021] It is further configured that: a heat insulation layer is provided between the second heat exchange module and the first heat exchange module.

[0022] It is further configured that: a spoiler protrusion is provided on the plate surface of at least one of the cylindrical plates.

[0023] Compared with the prior art, the present invention constructs the second heat exchange module for preparing steam into a ring structure and mounts it on the barrel-shaped first heat exchange module for hydrogen production. This makes the overall structure of the device more compact and reasonable, effectively reducing the overall volume of the device. At the same time, the device effectively extends the flow path of the first medium and the second medium, thereby effectively improving the heat exchange effect of the device, thereby improving the hydrogen production efficiency of the device and reducing the energy consumption of hydrogen production. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of a heat exchange device for reforming hydrogen production according to the present invention;

[0025] Figure 2 This is a schematic diagram of the three-dimensional structure of the heat exchange device Figure 2 ;

[0026] Figure 3 It is a schematic diagram of the axial cross-sectional structure of the heat exchange device;

[0027] Figure 4 Schematic diagram of the radial cross-section structure of the heat exchange device after removing the plugging cover;

[0028] Figure 5 is a schematic diagram of a partially separated structure of the first heat exchange module;

[0029] Figure 6 It is a schematic diagram of the partial separation structure of the second heat exchange module.

[0030] The following reference numerals are marked on the accompanying drawings:

[0031] 100. First heat exchange module; 110. Shell; 111. First straight channel; 112. Second straight channel; 113. Bottom; 120. Heat exchange tube; 121. Catalyst box; 130. Connecting member; 131. Ring body; 132. Cover body; 133. Connecting arm; 140. Spoiler; 200. Second heat exchange module; 210. Cylindrical plate; 211. Spoiler protrusion; 212. Through hole; 220. Cover; 230. First supporting structure; 231. Support block; 2311. Connecting hole; 240. Second supporting structure; 241. Support ring; 242. Separator; 250. First medium outlet; 260. Second medium inlet; A. First end; B. Second end; C. Heat exchange chamber; D. First medium space; E. Second medium space; F. Collecting and distributing chamber. DETAILED DESCRIPTION

[0032] A specific embodiment of the present invention is described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0033] The present invention provides a heat exchange device for reforming hydrogen production. Figure 1 and Figure 2 As shown, it includes a first heat exchange module 100 for reaction to produce hydrogen, and a second heat exchange module 200 for preparing steam, wherein the first heat exchange module 100 is a barrel-shaped structure, and the second heat exchange module 200 is a ring-shaped structure and is mounted on the outside of the first heat exchange module 100. The first heat exchange module 100 and the second heat exchange module 200 are preferably connected as a whole by welding, which can effectively reduce the overall volume of the device.

[0034] In this embodiment, if Figure 3 and Figure 5As shown, the first heat exchange module 100 is a shell and tube heat exchange structure, including a barrel-shaped shell 110 with a heat exchange chamber C, and a plurality of heat exchange tubes 120 axially extending and arranged in the shell 110, at least one heat exchange tube 120 is provided with a hydrogen production catalyst, and preferably the hydrogen production catalyst is installed in the heat exchange tube 120 in the form of a catalyst box 121; the shell 110 corresponding to its axial first end A port is an open structure and is constructed to be the first medium inlet of the device, and the shell 110 corresponding to its axial second end B is a closed structure with a bottom 113, the second ends B of the plurality of heat exchange tubes 120 are fixedly penetrated on the bottom 113 of the shell 110, and the second end B ports of the plurality of heat exchange tubes 120 are constructed to be the second medium outlet of the device.

[0035] In this embodiment, if Figure 3 and Figure 6 As shown, the second heat exchange module 200 is an annular structure and is fixedly mounted (welded) on the outside of the first heat exchange module 100. The second heat exchange module 200 includes a plurality of cylindrical plates 210 that are nested and connected in sequence. The second heat exchange module 200 forms a first medium space D and a second medium space E that are alternately arranged from the outside to the inside between the adjacent cylindrical plates 210. It should be noted that the shell 110 of the first heat exchange module 100 is the innermost cylindrical plate 210 of the second heat exchange module 200. At the same time, the first medium space D and the second medium space inside the second heat exchange module 200 are connected to each other for the flow of the first medium (high-temperature air) and the second medium (methanol water) respectively; the second heat exchange module 200 is provided with a first medium outlet connected to the first medium space D and a second medium inlet connected to the second medium space E. At the same time, a second end B of the first heat exchange module 100 and a second end B of the second heat exchange module 200 are connected. A first connecting structure connecting the heat exchange chamber C and the first medium space D is provided, and a second connecting structure connecting the first end A port of the heat exchange tube 120 and the second medium space E is provided between the first end A of the first heat exchange module 100 and the first end A of the second heat exchange module 200. Thus, the flow path of the first medium (high-temperature air) in the present device is: the first end A port of the shell 110 (first medium inlet) → the heat exchange chamber C → the second end B of the shell 110 → the first connecting structure → the first medium space D → the first medium outlet 250. The flow path of the second medium (methanol-water) in the present device is: the second medium inlet 260 → the second medium space E → the second connecting structure → the second end B port of the heat exchange tube 120 → the heat exchange tube 120 → the first end A port of the heat exchange tube 120 (second medium outlet). This effectively extends the flow path of the first and second media, increases the heat exchange area, and thus improves the overall heat exchange effect and hydrogen production effect of the device.

[0036] In this embodiment, if Figure 3 and Figure 6As shown, the second heat exchange module 200 also includes a plugging cover 220 located at both axial ends of the cylindrical plate 210, and the plugging covers 220 at both ends are correspondingly constructed at both axial ends of the second heat exchange module 200 to form a distribution cavity F connected to the first medium space D or the second medium space E; specifically, the plugging cover 220 is an annular cover structure, and the inner edge and outer edge of the cover are respectively sealed and welded with the innermost cylindrical plate 210 and the outermost cylindrical plate 210 to form the distribution cavity F; or, the plugging cover 220 is an annular plate structure, and the axial ends of the outermost cylindrical plate 210 and the axial ends of the shell 110 both protrude from the end of the cylindrical plate 210 located therebetween, and the plugging cover 220 is seal-welded between the outermost cylindrical plate 210 and the outer wall of the shell 110 to form the distribution cavity F.

[0037] In this embodiment, if Figure 3 and Figure 4 As shown, the second heat exchange module 200 also includes a first support structure 230 and a second support structure 240 alternately arranged between adjacent cylindrical plates 210. The adjacent cylindrical plates 210 are supported by the first support structure 230 and the second support structure 240 so that the plates are arranged at a stable spacing to form a first medium space D and a second medium space E.

[0038] In the above solution, the first support structure 230 is located in the first medium space D. The first support structure 230 includes at least one metal support block 231. The metal support block 231 is sealed and welded to the cylindrical plates 210 on both sides. At the same time, a connecting hole 2311 is provided on the support block 231. The cylindrical plates 210 on both sides are correspondingly provided with a through hole 212. In this way, the connecting hole 2311 and the through holes 212 on both sides cooperate with the two second medium spaces E on both sides of the first medium space D. Preferably, the first support structure 23 0 includes two groups, each group includes a plurality of annularly spaced support blocks 231. The two groups of support blocks 231 are respectively clamped between the two ends of two adjacent cylindrical plates 210, and the support blocks 231 are welded to the cylindrical plates 210 on both sides. The first medium space D and the distribution cavity F are connected through the gap between adjacent support blocks 231. In this way, the first medium spaces D of the second heat exchange module 200 are connected to each other through the distribution cavity F. The first medium outlet 250 is installed on the outermost cylindrical plate 210.

[0039] In the above solution, the second support structure 240 is located in the second medium space E and includes two metal support rings 241. The two metal support rings 241 are respectively clamped between the two ends of the two adjacent cylindrical plates 210 and are sealed and welded to the cylindrical plates 210 on both sides. In this way, the two support rings 241 completely block the two ends of the second medium space E to block the communication between the second medium space E and the collecting and distributing cavity F; at the same time, the adjacent second medium spaces E are connected at the corresponding support blocks 231, that is, the first At least one support block 231 in the medium space D is provided with a connecting hole 2311, and the cylindrical plates 210 on both sides are provided with through holes 212 connected to the connecting holes 2311. In this way, the second medium space E in the second heat exchange module 200 is connected through the through holes 212 on the cylindrical plate 210 and the connecting holes 2311 on the support block 231. The second medium inlet 260 passes through the outermost cylindrical plate 210 and is connected to the through holes 212 on the second cylindrical plate 210.

[0040] In some other specific embodiments, the first support structure 230 may also include a rubber sealing block, which replaces the metal support block 231 in the above embodiment; or, the first support structure 230 may also include a convex bump stamped on at least one side of the cylindrical plate 210, which is offset against the opposite cylindrical plate 210 or the opposite convex bump to replace the metal support block 231 in the above embodiment.

[0041] In some other specific embodiments, the second support structure 240 may also include a rubber sealing ring, which replaces the metal support ring 241 in the above embodiment; or, the second support structure 240 may also include an annular bulge stamped on at least one side of the cylindrical plate 210, which is abutted against the relative cylindrical plate 210 or against the relative annular bulge to replace the metal support ring 241 in the above embodiment.

[0042] In this embodiment, the innermost medium space in the second heat exchange module 200 is the second medium space E. At least one through first straight channel 111 is constructed between the collecting and distributing cavity F at the second end B and the second end B of the shell 110 to realize the connection between the first medium space D and the heat exchange cavity C of the shell 110. The first through channel 111 is a first through-port structure provided on the second end B of the shell 110. At least one through second straight channel 112 is constructed between the first end A of the innermost tubular plate 210 and the first end A of the shell 110. The second through channel 112 is a second through-port structure provided on the second end B of the shell 110. At the same time, a connecting component 130 is provided in the opening of the first end A of the shell 110. The connecting component 130 is used to connect the port of the second through channel 112 with the port of the heat exchange tube 120 to realize the structural connection between the second medium space E and the heat exchange tube 120.

[0043] In the above scheme, the connecting member 130 includes a ring body 131, a cover body 132 located in the ring body 131, and a plurality of connecting arms 133 for connecting the ring body 131 and the cover body 132, wherein the ring body 131 is correspondingly arranged on the inner wall of the shell 110 and the ring body 131 is provided with a notch corresponding to the end of the second straight-through channel 112, the number of the cover bodies 132 is the same as the number of the heat exchange tubes 120, and the two are covered in a one-to-one correspondence, and a connecting channel connecting the notch and the cover body 132 is constructed in the connecting arm 133; preferably, the number of the second straight-through channels 112 is the same as the number of the heat exchange tubes 120, and the ring body 131 is provided with the same number of notches as the second straight-through channels 112 and arranged in a one-to-one correspondence, and the number of connecting arms 133 is the same as the number of the cover bodies 132 to realize a one-to-one correspondence between the notch and the cover body 132; preferably, each second of the second heat exchange module 200 The medium space E is divided into chambers equal in number to the heat exchange tubes 120. Specifically, the second support structure 240 further includes a plurality of dividing bars 242 connected between the two support rings 241. The plurality of dividing bars 242 divide the second medium space E into a plurality of chambers. Within the projection range of each chamber corresponding to the first medium space D, at least one support block 231 having a connecting hole 2311 structure is provided to achieve respective communication between the relative chambers. At the same time, the number of second medium inlets 260 is the same as the number of chambers in each second medium space E and the structure is arranged to be connected in a one-to-one correspondence. Methanol water is respectively injected into the plurality of chambers of the second medium space E through the plurality of second medium inlets 260, and vaporizes into steam under the heating of the high-temperature air flowing in the first medium space D. Then, the methanol water is introduced into the respective heat exchange tubes 120 through the connecting component 130 and reacts with the hydrogen production catalyst under the action of the high-temperature air in the heat exchange chamber C to produce hydrogen.

[0044] In the above scheme, a spoiler protrusion 211 is provided on the plate surface of at least one of the cylindrical plates 210 of the second heat exchange module 200, so that the spoiler protrusion 211 is used to disturb the flow of the first medium and / or the second medium in the respective medium spaces, so as to further improve the heat exchange effect of the second heat exchange module 200.

[0045] In the above scheme, a flow disturbance plate 140 is provided in the heat exchange chamber C of the shell 110. Specifically, the flow disturbance plate 140 is sleeved on the heat exchange tube 120 to make the high-temperature air flowing in through the first medium inlet flow in the heat exchange chamber C alternately converged through the middle of the spoiler 140 and dispersed through the edge of the spoiler 140, thereby disturbing the flow of high-temperature air in the heat exchange chamber C to further improve the heat exchange effect of the first heat exchange module 100; preferably, an insulation layer is provided between the second heat exchange module 200 and the first heat exchange module 100 to effectively improve the thermal insulation effect of the second heat exchange module 200 and effectively avoid direct heat loss.

[0046] Compared with the prior art, the present invention constructs the second heat exchange module for preparing steam into a ring structure and mounts it on the barrel-shaped first heat exchange module for hydrogen production. This makes the overall structure of the device more compact and reasonable, effectively reducing the overall volume of the device. At the same time, the device effectively extends the flow path of the first medium and the second medium, thereby effectively improving the heat exchange effect of the device, thereby improving the hydrogen production efficiency of the device and reducing the energy consumption of hydrogen production.

[0047] The above disclosure is only an embodiment of the present invention, but the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A heat exchange device for reforming hydrogen production, characterized in that: include: A first heat exchange module comprises a barrel-shaped shell having a heat exchange cavity, and a plurality of heat exchange tubes axially extending in the heat exchange cavity, wherein a first end port of the shell is an open structure and is configured as a first medium inlet, and a second end port of the shell is a closed structure having a bottom, and the second ends of the plurality of heat exchange tubes extend through the bottom of the second end of the shell and are configured as second medium outlets; The second heat exchange module has an annular structure and is mounted outside the first heat exchange module. The second heat exchange module includes a plurality of cylindrical plates that are nested and connected at intervals. The first medium spaces and the second medium spaces are alternately arranged between the adjacent cylindrical plates of the second heat exchange module. The first medium spaces of the second heat exchange modules are connected to each other for the flow of the first medium, and the second medium spaces of the second heat exchange modules are connected to each other for the flow of the second medium. The first heat exchange module is also provided with a first medium outlet connected to the first medium space, and a second medium inlet connected to the second medium space; A first connecting structure for connecting the heat exchange cavity and the first medium space is configured between the second end of the first heat exchange module and the second end of the second heat exchange module, and a second connecting structure for connecting the first end port of the heat exchange tube and the second medium space is configured between the first end of the first heat exchange module and the first end of the second heat exchange module; The second heat exchange module further includes blocking covers located at both axial ends, and the two blocking covers are configured to form a collecting and distributing cavity connected to the first medium space or the second medium space at both axial ends of the second heat exchange module; The second heat exchange module further includes a first support structure and a second support structure alternately arranged between adjacent cylindrical plates so that the cylindrical plates are spaced apart, and the second support structure also blocks the axial ends of the corresponding medium space to block the communication with the collecting and distributing cavity; At least one of the cylindrical plates is provided with a flow-turbulating protrusion on its surface.

2. A heat exchange device for reforming hydrogen production according to claim 1, characterized in that: The blocking cover is an annular cover structure, and the inner edge and outer edge of the cover are respectively sealed with the innermost cylindrical plate and the outermost cylindrical plate; Alternatively, the plugging cover is an annular plate structure, and the two ends of the outermost cylindrical plate and the two ends of the shell both protrude from the two ends of the cylindrical plate located between them, and the plugging cover is sealed and arranged between the inner wall of the outermost cylindrical plate and the outer wall of the shell.

3. The heat exchange device for reforming hydrogen production according to claim 1, characterized in that: The collecting and distributing cavity is connected to another medium space different from the innermost medium space, and at least one first straight-through channel is provided at one end of the corresponding axial direction between the cavity wall of the collecting and distributing cavity and the cavity wall of the heat exchange cavity; At least one second straight-through channel is provided between the cavity wall of the innermost medium space and the cavity wall of the heat exchange cavity at the other end corresponding to the axial direction.

4. A heat exchange device for reforming hydrogen production according to claim 3, characterized in that: A connecting component is provided in the first end port of the shell, and the connecting component includes a ring body, a plurality of covers located in the ring body, and a plurality of connecting arms for connecting the ring body and the covers. The ring body is correspondingly arranged on the inner wall of the heat exchange cavity and is correspondingly provided with a notch that is connected to the port of the straight-through channel. The number of the covers is the same as the number of the heat exchange tubes and they are correspondingly covered on the first end ports of the heat exchange tubes. A connecting channel for connecting the notch and the cover is constructed in the connecting arm.

5. The heat exchange device for reforming hydrogen production according to claim 1, characterized in that: The first supporting structure includes at least one supporting block, which is sealed and connected to the cylindrical plates on both sides. A connecting hole is provided on the supporting block, and the cylindrical plates on both sides are provided with through holes that connect with the connecting holes on the supporting block.

6. The heat exchange device for reforming hydrogen production according to claim 1, characterized in that: The second supporting structure includes two supporting ring structures. The two supporting rings are respectively arranged between the two ends of the cylindrical plate to block the communication between the corresponding medium space and the collecting and distributing cavity.

7. A heat exchange device for hydrogen production by reforming according to claim 6, characterized in that: The second supporting structure further includes a plurality of partition bars connected between the two supporting rings, and the plurality of partition bars divide the corresponding medium space into a plurality of chambers.

8. The heat exchange device for reforming hydrogen production according to claim 1, characterized in that: Several interfering flow plates are arranged in the heat exchange cavity.

9. The heat exchange device for reforming hydrogen production according to claim 1, characterized in that: A heat insulation layer is provided between the second heat exchange module and the first heat exchange module.

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