Ammonia cracking hydrogen production device

Abstract

The embodiment of the invention provides an ammonia cracking hydrogen production device. The ammonia cracking hydrogen production device comprises a flow channel assembly, the flow channel assembly comprises a flow channel plate and a catalyst sheet, the flow channel plate is provided with a plate inlet, a plate outlet and at least two catalytic flow channels, the at least two catalytic flow channels are connected between the plate inlet and the plate outlet in parallel, and the catalyst sheet is arranged on the flow channel plate and arranged side by side with the at least two catalytic flow channels. According to the ammonia cracking hydrogen production device, the ammonia gas is cracked through the at least two catalytic flow channels at the same time, so that the device has high hydrogen preparation efficiency, meanwhile, due to the fact that the catalyst pieces and the flow channel plates are simple in structure and convenient to install and replace, the cost is reduced, and the production efficiency is improved. Therefore, the ammonia cracking hydrogen production device disclosed by the embodiment of the invention is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The invention relates to the field of hydrogen preparation, and in particular to an ammonia cracking hydrogen production device. Background Art

[0002] Ammonia cracking hydrogen production is a process in which ammonia is heated and decomposed under the action of a catalyst to produce hydrogen and nitrogen. In the related art, the ammonia cracking hydrogen production device has an inner cavity with a circular cross section, and a spiral guide plate coated with a catalyst is provided in the inner cavity to form a spiral flow channel in the inner cavity, and the ammonia moves along the spiral flow channel and reacts with the catalyst. However, the hydrogen production efficiency of the ammonia cracking hydrogen production device in the related art is low, and the manufacturing cost is high due to the spiral guide plate. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides an ammonia cracking hydrogen production device.

[0005] The ammonia cracking hydrogen production device according to the embodiment of the present invention comprises:

[0006] A flow channel assembly, the flow channel assembly includes a flow channel plate and a catalyst sheet, the flow channel plate is provided with a plate inlet, a plate outlet and at least two catalytic flow channels, at least two of the catalytic flow channels are connected in parallel between the plate inlet and the plate outlet, the catalyst sheet is arranged on the flow channel plate and arranged side by side with at least two of the catalytic flow channels.

[0007] In the ammonia cracking hydrogen production device of the embodiment of the present invention, ammonia enters at least two catalytic flow channels from the plate inlet of the flow channel plate, and contacts the catalyst of the catalyst sheet in the process of flowing through the catalytic flow channels, thereby being cracked to generate hydrogen and nitrogen, and the generated hydrogen and nitrogen are discharged from the plate outlet. The ammonia cracking hydrogen production device of the embodiment of the present invention simultaneously cracks ammonia through at least two catalytic flow channels, thereby having a high hydrogen production efficiency. At the same time, since the catalyst sheet and the flow channel plate have a simple structure and are easy to install and replace the catalyst sheet, the ammonia cracking hydrogen production device of the embodiment of the present invention has a simple structure and low manufacturing cost.

[0008] In some embodiments, the flow channel plate is also provided with a branch channel and a confluence channel. The branch channel is connected between the plate inlet and at least two of the catalytic flow channels, and is used to divert the ammonia provided by the plate inlet to at least two of the catalytic flow channels. The confluence channel is connected between the plate outlet and at least two catalytic flow channels, and is used to converge the ammonia in at least two of the catalytic flow channels to the plate outlet.

[0009] In some embodiments, at least one end surface of the flow channel plate is provided with a groove, and a plurality of guide ridges arranged side by side are provided in the groove, and the catalytic flow channel is formed on both sides of each of the guide ridges.

[0010] In some embodiments, the protrusion height of the guide ridges is lower than the depth of the grooves, and at least a portion of the catalyst sheet is disposed in the grooves and abuts against a plurality of the guide ridges.

[0011] In some embodiments, the groove is divided into a diversion area, a catalytic area and a confluence area from the plate inlet to the plate outlet. The diversion area is provided with a plurality of dispersed diversion protrusions to form the diversion channel. The confluence area is provided with a plurality of dispersed confluence protrusions to form the confluence channel. The catalytic area is provided with the guide protrusions, and the catalyst sheet is at least arranged in the catalytic area.

[0012] In some embodiments, along the direction from the plate inlet to the plate outlet, the cross-section of the diverter area increases, the diverter bosses are arranged in at least two rows arranged at intervals, and the number of the diverter bosses in the front row is less than the number of the diverter bosses in the rear row, and the cross-section of the confluence area decreases, the confluence bosses are arranged in at least two rows arranged at intervals, and the number of the confluence bosses in the front row is less than the number of the confluence bosses in the rear row.

[0013] In some embodiments, the flow channel assembly includes at least two stacked flow channel plates, the catalyst sheet is provided between the catalytic flow channels of two adjacent flow channel plates, and the plate inlets of two adjacent flow channel plates are connected, and the plate outlets of two adjacent flow channel plates are connected.

[0014] In some embodiments, the flow channel assemblies are at least two stacked together, the flow channel plate includes a first end and a second end, the first end of the flow channel plate is provided with at least two of the catalytic flow channels, the first ends of adjacent flow channel plates in the flow channel assembly are relatively arranged, and the catalyst sheet is provided between the first ends of adjacent flow channel plates, and in adjacent flow channel assemblies, the second end of the outermost flow channel plate of one of the flow channel assemblies is relatively arranged with the second end of the outermost flow channel plate of another of the flow channel assemblies.

[0015] In some embodiments, the ammonia cracking hydrogen production device further includes a heating component, and the heating component is used to heat the ammonia in the catalytic flow channel.

[0016] In some embodiments, the heating component is disposed between adjacent flow channel components.

[0017] In some embodiments, the heating assembly includes a heating element and a temperature sensor, and the heating element and the temperature sensor are both arranged corresponding to at least two of the catalytic flow channels.

[0018] In some embodiments, the ammonia cracking hydrogen production device further includes a first sealing ring, which is disposed between the first ends of adjacent flow channel plates in the flow channel assembly, and the first sealing ring at least surrounds the outer circumference of at least two of the catalytic flow channels.

[0019] In some embodiments, the ammonia cracking hydrogen production device also includes a second sealing ring, the plate inlet and the plate outlet pass through the flow channel plate, the first sealing ring surrounds the plate inlet, the plate outlet and the outer periphery of at least two of the catalytic flow channels, the second sealing ring is arranged between the second ends of adjacent flow channel assemblies that are relatively arranged, the second sealing ring surrounds the outer periphery of the plate inlet and the plate outlet, or, the outer periphery of the plate inlet surrounds one second sealing ring, and the outer periphery of the plate outlet surrounds another second sealing ring.

[0020] In some embodiments, the ammonia cracking hydrogen production device also includes an outer shell, which is provided with a shell inlet, an inner cavity and a shell outlet that are connected, and at least two stacked flow channel assemblies are provided in the inner cavity, each of the plate inlets is connected to the shell inlet, and each of the plate outlets is connected to the shell outlet.

[0021] In some embodiments, the outer shell includes an insulating cotton shell and a fixing part, the insulating cotton shell is provided with the shell inlet, the inner cavity and the shell outlet, the fixing part is arranged in the insulating cotton shell, and the flow channel plate abuts against the fixing part at least at two ends along a direction orthogonal to the stacking direction.

[0022] In some embodiments, the housing further comprises a sensor assembly, wherein the sensor assembly is used to detect hydrogen and nitrogen, and the sensor assembly is disposed in the thermal insulation cotton housing.

[0023] In some embodiments, the flow channel plate is made of ceramic material, and the catalyst sheet includes a substrate and an ammonia cracking catalyst coating coated on the surface of the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of a first end of a flow channel plate of an ammonia cracking hydrogen production device according to an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the second end of the flow channel plate of the ammonia cracking hydrogen production device according to an embodiment of the present invention;

[0026] Figure 3 Schematic diagram of the installation of the flow channel plate and the catalyst sheet of the ammonia cracking hydrogen production device according to the embodiment of the present invention;

[0027] Figure 4 is a front cross-sectional view of an ammonia cracking hydrogen production device according to an embodiment of the present invention;

[0028] Figure 5 It is a side sectional view of a flow channel assembly of an ammonia cracking hydrogen production device according to an embodiment of the present invention.

[0029] Reference numerals:

[0030] 1. Flow channel assembly; 11. Flow channel plate; 111. Plate inlet; 112. Plate outlet; 113. Catalytic flow channel; 114. Diverter channel; 115. Converging channel; 116. Groove; 1161. Diverter area; 1162. Catalytic area; 1163. Converging area; 117. Diverter convex column; 118. Converging convex column; 119. Guide convex strip; 12. Catalyst sheet;

[0031] 2. Heating assembly; 21. Heating element; 22. Temperature sensor;

[0032] 3. The first sealing ring;

[0033] 4. Second sealing ring;

[0034] 5. Shell; 51. Shell inlet; 52. Inner cavity; 53. Shell outlet; 54. Thermal insulation cotton shell; 55. Fixing part; 56. Sensor assembly. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] Reference below Figure 1-Figure 5 An ammonia cracking hydrogen production device according to an embodiment of the present invention is described.

[0037] like Figure 1-Figure 5 As shown, the ammonia cracking hydrogen production device according to the embodiment of the present invention includes a flow channel component 1.

[0038] The flow channel assembly 1 includes a flow channel plate 11 and a catalyst sheet 12. The flow channel plate 11 is provided with a plate inlet 111, a plate outlet 112 and at least two catalytic flow channels 113. The at least two catalytic flow channels 113 are connected in parallel between the plate inlet 111 and the plate outlet 112. For example, Figure 1 As shown, the flow channel assembly 1 is preferably but not limited to being horizontally arranged, the plate inlet 111 and the plate outlet 112 are preferably but not limited to being arranged at intervals in the left-right direction, a plurality of catalytic flow channels 113 are connected between the plate inlet 111 and the plate outlet 112, and the plurality of catalytic flow channels 113 are preferably but not limited to being arranged at intervals in the front-to-back direction so as to be connected in parallel between the plate inlet 111 and the plate outlet 112.

[0039] The catalyst sheet 12 is disposed on the flow channel plate 11 and arranged side by side with at least two catalytic flow channels 113. Figure 3 As shown, the catalyst sheet 12 is preferably but not limited to being arranged horizontally, the catalyst sheet 12 is arranged on the flow channel plate 11 , and the catalyst sheet 12 is preferably but not limited to covering a plurality of catalytic flow channels 113 .

[0040] When the ammonia cracking hydrogen production device is in use, ammonia enters at least two catalytic flow channels 113 from the plate inlet 111 of the flow channel plate 11, and contacts the catalyst of the catalyst sheet 12 in the process of flowing through the catalytic flow channels 113, thereby being cracked to generate hydrogen and nitrogen, and the generated hydrogen and nitrogen are discharged from the plate outlet 112.

[0041] It is understandable that if the ammonia is not completely cracked in the catalytic flow channel 113, the gas discharged from the plate outlet 112 is mixed with residual ammonia that has not been cracked.

[0042] The ammonia cracking hydrogen production device of the embodiment of the present invention simultaneously cracks ammonia through at least two catalytic flow channels, thereby having a higher hydrogen production efficiency. At the same time, since the catalyst sheet and the flow channel plate have a simple structure and are easy to install and replace the catalyst sheet, the ammonia cracking hydrogen production device of the embodiment of the present invention has a simple structure and a low manufacturing cost.

[0043] In some embodiments, the catalyst sheet 12 includes a substrate and an ammonia cracking catalyst coating coated on the surface of the substrate.

[0044] The ammonia cracking catalyst coating is used to react with the ammonia flowing through the catalytic flow channel 113, so as to crack the ammonia into hydrogen and nitrogen. The ammonia cracking catalyst coating is preferably but not limited to a Ru-Al2O3 catalyst.

[0045] The substrate is preferably, but not limited to, carbon paper or foamed metal foil, so as to be coated with an ammonia cracking catalyst coating.

[0046] In some embodiments, the flow channel plate 11 is preferably but not limited to being made of ceramic material, which is easy to process, low in cost, and resistant to high temperatures, acids and alkalis.

[0047] It is understandable that the flow channel plate 11 can also be made of metal, hard plastic, wood and other materials.

[0048] In some embodiments, the flow channel plate 11 is further provided with a branch channel 114 and a confluence channel 115. The branch channel 114 is connected between the plate inlet 111 and at least two catalytic flow channels 113, and is used to divert the ammonia provided by the plate inlet 111 to at least two catalytic flow channels 113. The confluence channel 115 is connected between the plate outlet 112 and at least two catalytic flow channels 113, and is used to converge the ammonia in at least two catalytic flow channels 113 to the plate outlet 112.

[0049] like Figure 1 As shown, the flow channel plate 11 is also provided with a branch channel 114 and a confluence channel 115. The left end of the branch channel 114 is connected to the plate inlet 111, and the right end of the branch channel 114 is connected in parallel to multiple catalytic channels 113. The branch channel 114 is used to divert the ammonia provided by the plate inlet 111 so that the ammonia can evenly enter the multiple catalytic channels 113.

[0050] The left end of the confluence channel 115 is connected in parallel to a plurality of catalytic channels 113 , and the right end of the confluence channel 115 is connected to the plate outlet 112 . The confluence channel 115 is used to converge the gases discharged from the plurality of catalytic channels 113 and then supply them to the plate outlet 112 so as to be discharged from the channel assembly 1 through the plate outlet 112 .

[0051] It can be understood that, in other embodiments, a plurality of catalytic flow channels can also be directly connected in parallel between a plate inlet extending in a strip shape along the front-to-back direction and a plate outlet extending in a strip shape along the front-to-back direction.

[0052] In some embodiments, at least one end surface of the flow channel plate 11 is provided with a groove 116 , and a plurality of guide ridges 119 arranged side by side are provided in the groove 116 , and catalytic flow channels 113 are formed on both sides of each guide ridge 119 .

[0053] like Figure 1 As shown, the first end and the second end of the flow channel plate 11 arranged along the thickness direction can both be provided with a groove 116, or a groove 116 can be provided at one end. Preferably, the first end of the flow channel plate 11 is provided with a groove 116, and the groove 116 is connected between the plate inlet 111 and the plate outlet 112.

[0054] A guide rib 119 is provided in the groove 116. The guide rib 119 preferably, but not limited to, extends in the left-right direction. The guide rib 119 protrudes from the bottom surface of the groove 116. There are preferably multiple guide ribs 119, and the multiple guide ribs 119 are arranged at intervals in the front-to-back direction. A catalytic flow channel 113 is formed between two adjacent guide ribs 119. A catalytic flow channel 113 is also formed between the guide rib 119 located at the outermost side in the front-to-back direction and the side wall surface of the groove 116, thereby forming multiple catalytic flow channels 113 in the groove 116 through the guide ribs 119.

[0055] The widths of the multiple catalytic channels 113 along the front-to-back direction are preferably set to be the same. In other embodiments, the widths of the multiple catalytic channels 113 may also be different. The flow rate of ammonia in the catalytic channel 113 is adjusted by the width of the catalytic channel 113, so that the ammonia flows evenly in the multiple catalytic channels 113.

[0056] When the catalyst sheet 12 is installed on the flow channel plate 11, the catalyst sheet 12 covers the multiple catalytic flow channels 113 through the notches of the grooves 116, so that the ammonia gas contacts the catalyst sheet 12 and is cracked when flowing through the catalytic flow channels 113, and the structure of the flow channel assembly 1 is simple, which facilitates the installation and replacement of the catalyst sheet 12.

[0057] It can be understood that the guide ribs are not limited to being strips extending in the left-right direction. In other embodiments, the guide ribs are in the shape of wavy curves extending in the left-right direction, or, when the plate inlet and plate outlet are arranged tilted in the left-right direction, the guide ribs are in the shape of arcs or quarter circles.

[0058] In some embodiments, the protrusion height of the guide ridges 119 is lower than the depth of the grooves 116 , and at least a portion of the catalyst sheet 12 is disposed in the grooves 116 and abuts against a plurality of the guide ridges 119 .

[0059] like Figure 3 and Figure 5 As shown, the height of the guide rib 119 protruding from the bottom surface of the groove 116 is lower than the depth of the groove 116, so that an installation space is formed between the end surface of the first end of the flow channel plate 11 and the end surface of the guide rib 119. The catalyst sheet 12 is entirely or partially embedded in the groove 116 along its thickness direction and abuts against multiple guide ribs 119, so that the catalyst sheet 12 covers multiple catalytic flow channels 113, ensuring that the ammonia gas is cracked when flowing through the catalytic flow channel 113, and at the same time facilitating the installation and replacement of the catalyst sheet 12.

[0060] It can be understood that the catalyst sheet is not limited to being embedded in the groove. In other embodiments, the catalyst sheet is disposed on the end surface of the first end.

[0061] In some embodiments, the groove 116 is divided into a diversion area 1161, a catalytic area 1162 and a confluence area 1163 from the plate inlet 111 to the plate outlet 112. The diversion area 1161 is provided with a plurality of dispersed diversion protrusions 117 to form a diversion channel 114. The confluence area 1163 is provided with a plurality of dispersed confluence protrusions 118 to form a confluence channel 115. The catalytic area 1162 is provided with a guide protrusion 119, and the catalyst sheet 12 is at least arranged in the catalytic area 1162.

[0062] like Figure 1 and Figure 3As shown, the plate inlet 111 and the plate outlet 112 are preferably but not limited to being arranged at intervals from left to right, the groove 116 extends in the left-right direction and is connected between the plate inlet 111 and the plate outlet 112, and the groove 116 is divided into a diversion area 1161, a catalytic area 1162 and a confluence area 1163 from left to right, the left end of the diversion area 1161 is connected to the plate inlet 111, preferably, the plate inlet 111 is connected to the middle of the diversion area 1161 along the front-to-back direction. The right end of the confluence area 1163 is connected to the plate outlet 112, preferably, the plate outlet 112 is connected to the middle of the confluence area 1163 along the front-to-back direction.

[0063] A plurality of flow-dividing protrusions 117 are provided in the flow-dividing area 1161. The flow-dividing protrusions 117 protrude from the bottom surface of the groove 116. The flow-dividing protrusions 117 are preferably, but not limited to, cylindrical. The plurality of flow-dividing protrusions 117 are dispersedly arranged in the flow-dividing area 1161. In other words, the plurality of flow-dividing protrusions 117 are arranged at intervals in the flow-dividing area 1161. Thus, the flow-dividing area 1161 forms a flow-dividing channel 114.

[0064] A plurality of guide ribs 119 extending in the left-right direction and arranged at intervals in the front-back direction are provided in the catalytic zone 1162 , so that a plurality of catalytic flow channels 113 are formed in the catalytic zone 1162 through the guide ribs 119 .

[0065] All or part of the catalyst sheet 12 along the thickness direction is embedded in the catalytic region 1162 , thereby covering the plurality of catalytic channels 113 .

[0066] A plurality of confluence bosses 118 are provided in the confluence area 1163. The confluence bosses 118 protrude from the bottom surface of the groove 116. The confluence bosses 118 are preferably, but not limited to, cylindrical. The plurality of confluence bosses 118 are dispersedly arranged in the confluence area 1163. In other words, the plurality of confluence bosses 118 are arranged at intervals in the confluence area 1163. Thus, the confluence area 1163 forms a confluence channel 115.

[0067] When the ammonia cracking hydrogen production device is in operation, ammonia enters the diversion area 1161 from the plate inlet 111 and then flows to the right. The ammonia is blocked by the diversion protrusion 117 during the flow in the diversion area 1161, so that the ammonia is dispersed through multiple diversion protrusions 117, so that the ammonia evenly enters the multiple catalytic flow channels 113 in the catalytic area 1162. The ammonia moves in the catalytic flow channel 113 under the guidance of the guide protrusion 119 and contacts the ammonia cracking catalyst coating of the catalyst sheet 12 to crack and form hydrogen and nitrogen. The cracked gas enters the confluence area 1163 from the catalytic flow channel 113 and flows to the right. The gas is blocked by the confluence protrusion 118 during the flow in the confluence area 1163, so that the gas is gathered through multiple confluence protrusions 118, so that the gas enters the plate outlet 112.

[0068] The branch channel 114 , the catalytic channel 113 and the converging channel 115 are formed simultaneously by the groove 116 , so that the flow channel plate 11 is easy to process.

[0069] It can be understood that the cross-sections of the diverter boss and the converging boss are not limited to being circular. In other embodiments, the plate inlet is connected to the front end of the diverter area, and the plate outlet is connected to the rear end of the converging area. The cross-section of the diverter boss is an arc extending from the plate inlet toward the corresponding catalytic flow channel, and the cross-section of the converging boss is an arc extending from the corresponding catalytic flow channel toward the plate outlet.

[0070] It can be understood that the diverter and confluence channel are not limited to being formed by convex columns in the groove. In other embodiments, the diverter and confluence channel are grid-like grooves arranged at the first end, or the diverter and confluence channel are grid-like channels arranged inside the flow channel plate.

[0071] It can be understood that the catalyst sheet is not limited to being arranged in the catalytic zone. In other embodiments, the end face of the converging boss and the end face of the diverting boss are flush with the end face of the guide strip, and are all lower than the end face of the first end of the flow channel plate. The catalyst sheet is embedded in the diverting zone, the catalytic zone and the converging zone at the same time, and is offset against the converging boss, the diverting boss and the guide strip.

[0072] In some embodiments, along the direction from the plate inlet 111 to the plate outlet 112, the cross-section of the diverter area 1161 increases, the diverter bosses 117 are arranged in at least two rows arranged at intervals, and the number of diverter bosses 117 in the front row is less than the number of diverter bosses 117 in the rear row, and the cross-section of the confluence area 1163 decreases, the confluence bosses 118 are arranged in at least two rows arranged at intervals, and the number of confluence bosses 118 in the front row is less than the number of confluence bosses 118 in the rear row.

[0073] like Figure 1 As shown, the width of the diversion area 1161 along the front-to-back direction increases from left to right, so that the ammonia gas diffuses in the process of flowing from left to right in the diversion area 1161.

[0074] Multiple rows of diverter convex columns 117 are arranged at intervals along the left-right direction in the diverter area 1161, and each row of diverter convex columns 117 includes a plurality of diverter convex columns 117 arranged at intervals along the front-back direction. In two adjacent rows of diverter convex columns 117, the number of diverter convex columns 117 in the left row is less than the number of diverter convex columns 117 in the right row. Thus, the diverter convex columns 117 are dispersedly arranged, and the ammonia flowing in the diverter area 1161 is ensured to be fully dispersed, so that the ammonia gas evenly enters the multiple catalytic flow channels 113.

[0075] The width of the confluence area 1163 along the front-to-rear direction decreases from left to right, so that the ammonia gas converges in the confluence area 1163 during the process of flowing from left to right.

[0076] Multiple rows of converging protrusions 118 are arranged at intervals along the left-right direction in the converging area 1163, and each row of converging protrusions 118 includes a plurality of converging protrusions 118 arranged at intervals along the front-back direction. In two adjacent rows of converging protrusions 118, the number of converging protrusions 118 in the left row is greater than the number of converging protrusions 118 in the right row. Thus, the converging protrusions 118 are dispersedly arranged, and the ammonia flowing in the converging area 1163 is ensured to be fully collected and enter the plate outlet 112.

[0077] In some embodiments, the flow channel assembly 1 includes at least two stacked flow channel plates 11, a catalyst sheet 12 is provided between the catalytic flow channels 113 of two adjacent flow channel plates 11, and the plate inlets 111 of two adjacent flow channel plates 11 are connected, and the plate outlets 112 of two adjacent flow channel plates 11 are connected.

[0078] like Figure 4 and Figure 5 As shown, the flow channel assembly 1 includes at least two flow channel plates 11 stacked in a vertical direction, and in two adjacent flow channel plates 11, a plurality of catalytic flow channels 113 are provided at the bottom end of the upper flow channel plate 11 and the top end of the lower flow channel plate 11, a catalyst sheet 12 is provided between the upper flow channel plate 11 and the lower flow channel plate 11, and the catalyst sheet 12 is located between the plurality of catalytic flow channels 113 at the bottom end of the upper flow channel plate 11 and the plurality of catalytic flow channels 113 at the top end of the lower flow channel plate 11.

[0079] The plate inlet 111 of the upper flow channel plate 11 is communicated with the plate inlet 111 of the lower flow channel plate 11 , and the plate outlet 112 of the upper flow channel plate 11 is communicated with the plate outlet 112 of the lower flow channel plate 11 .

[0080] Preferably, the plate inlet 111 and the plate outlet 112 penetrate the flow channel plate 11 in the vertical direction, so that the plate inlets 111 of the stacked flow channel plates 11 are in communication, and the plate outlets 112 of the stacked flow channel plates 11 are in communication.

[0081] In other embodiments, the plate inlet and the plate outlet may also be grooves arranged on the end surface of the flow channel plate, the plate inlet forms an opening on the left side surface of the flow channel plate, and the plate outlet forms an opening on the right side surface of the flow channel plate, the plate inlet of the upper flow channel plate and the plate inlet of the lower flow channel plate are arranged opposite to and connected with each other, and the plate outlet of the upper flow channel plate and the plate outlet of the lower flow channel plate are arranged opposite to and connected with each other.

[0082] Ammonia is supplied to the catalytic flow channels 113 of the upper flow channel plate 11 and the lower flow channel plate 11 simultaneously through the plate inlet 111 connected to the upper flow channel plate 11 and the lower flow channel plate 11, and the catalyst sheet 12 contacts the ammonia in the catalytic flow channels 113 of the upper flow channel plate 11 and the lower flow channel plate 11 at the same time to crack the ammonia, and the cracked gas is discharged through the connected plate outlet 112, so that the flow channel assembly 1 can crack more ammonia and has a higher ammonia cracking efficiency.

[0083] It is understandable that the catalyst sheet is limited to being arranged between the catalytic flow channels of two adjacent flow channels plates. In other embodiments, the flow channels plates are stacked in multiples, each flow channel plate has a catalytic flow channel at the top and is connected to the catalyst plate, and each flow channel plate has no catalytic flow channel at the bottom.

[0084] In some embodiments, the flow channel assemblies 1 are at least two stacked ones, the flow channel plate 11 includes a first end and a second end, the first end of the flow channel plate 11 is provided with at least two catalytic flow channels 113, the first ends of adjacent flow channel plates 11 in the flow channel assemblies 1 are relatively arranged, and a catalyst sheet 12 is provided between the first ends of adjacent flow channel plates 11, and in adjacent flow channel assemblies 1, the second end of the outermost flow channel plate 11 of one flow channel assembly 1 is relatively arranged with the second end of the outermost flow channel plate 11 of another flow channel assembly 1.

[0085] like Figure 1-Figure 5 As shown, the flow channel plate 11 includes a first end and a second end, and the flow channel assembly 1 includes two flow channel plates 11, the bottom end of the upper flow channel plate 11 and the top end of the lower flow channel plate 11 are both first ends with a groove 116, and a catalyst sheet 12 is provided between the bottom end of the upper flow channel plate 11 and the top end of the lower flow channel plate 11, and the top end of the upper flow channel plate 11 and the bottom end of the lower flow channel plate 11 are both second ends.

[0086] Preferably, the groove 116 is divided into a diversion area 1161, a catalytic area 1162 and a confluence area 1163. The upper end of the catalyst sheet 12 is embedded in the catalytic area 1162 of the upper flow channel plate 11, and the lower end of the catalyst sheet 12 is embedded in the catalytic area 1162 of the lower flow channel plate 11. At this time, the catalyst sheet 12 also plays a role in positioning the upper flow channel plate 11 and the lower flow channel plate 11.

[0087] The diversion area 1161 of the upper flow channel plate 11 is arranged opposite to and connected to the diversion area 1161 of the lower flow channel plate to divert a large amount of ammonia supplied from the connected plate inlet 111 so that the ammonia gas evenly enters the catalytic flow channel 113 of the upper flow channel plate 11 and the lower flow channel plate.

[0088] The confluence area 1163 of the upper flow channel plate 11 is arranged opposite to and connected to the confluence area 1163 of the lower flow channel plate to merge the gas discharged from the catalytic flow channels 113 of the upper flow channel plate 11 and the lower flow channel plate, and then discharge it through the connected plate outlets 112.

[0089] It is understandable that, in other embodiments, the catalyst sheet may also be disposed between the bottom surface of the upper flow channel plate and the top surface of the lower flow channel plate.

[0090] like Figure 1-Figure 5As shown, the flow channel assembly 1 is preferably but not limited to being a plurality of flow channel assemblies 1 stacked in the vertical direction, and in two adjacent flow channel assemblies 1, the bottom end of the flow channel plate 11 located below in the upper flow channel assembly 1 (i.e., the second end of the flow channel plate 11) is arranged relative to the top end of the flow channel plate 11 located above in the lower flow channel assembly 1 (i.e., the second end of the flow channel plate 11).

[0091] Thus, ammonia is cracked simultaneously through the multiple flow channel components 1, so that the ammonia cracking hydrogen production device has a higher ammonia cracking efficiency.

[0092] It is understandable that the flow channel assembly is not limited to including two flow channel plates. In other embodiments, the flow channel assembly includes multiple flow channel plates, and catalyst sheets are provided between each adjacent flow channel plate. Each flow channel plate is provided with a catalytic flow channel on the end surface adjacent to another flow channel plate. In other words, among the multiple flow channel plates, the inner end surfaces of the two flow channel plates located on the outermost sides in the stacking direction are provided with catalytic flow channels, and the two end surfaces of the remaining flow channel plates are provided with catalytic flow channels.

[0093] In some embodiments, the ammonia cracking hydrogen production device according to the embodiment of the present invention further includes a heating component 2 , and the heating component 2 is used to heat the ammonia gas in the catalytic flow channel 113 .

[0094] The heating component 2 can be arranged on each flow channel plate 11 in the flow channel component 1, or on part of the flow channel plates 11 in the flow channel component 1. The heating component 2 can be arranged inside the flow channel plate 11, or on the surface of the flow channel plate 11.

[0095] The heating component 2 is used to release heat to heat the ammonia gas in the catalytic flow channel 113, so that the temperature of the ammonia gas can reach the required temperature of the cracking reaction.

[0096] It is understandable that, in other embodiments, the ammonia gas may be heated outside the flow channel assembly and then the heated ammonia gas may be supplied to the catalytic flow channel.

[0097] In some embodiments, the heating component 2 is disposed between adjacent flow channel components 1 .

[0098] like Figure 4 As shown, a heating component 2 is provided between adjacent flow channel components 1. In other words, in two adjacent flow channel components 1, a heating component 2 is provided between the bottom end of the flow channel plate 11 located below in the upper flow channel component 1 (i.e., the second end of the flow channel plate 11) and the top end of the flow channel plate 11 located above in the lower flow channel component 1 (i.e., the second end of the flow channel plate 11).

[0099] The ammonia in the catalytic flow channels 113 of two adjacent flow channel assemblies 1 is heated simultaneously by the heating component 2 to reduce energy consumption, simplify the structure of the ammonia cracking hydrogen production device, facilitate the installation of the heating component 2, and avoid interference between the heating component 2 and the catalyst sheet 12.

[0100] In some embodiments, the heating assembly 2 includes a heating element 21 and a temperature sensor 22 , and the heating element 21 and the temperature sensor 22 are both disposed corresponding to at least two catalytic flow channels 113 .

[0101] like Figure 2 and Figure 4 As shown, the heating assembly 2 includes a heating element 21 and a temperature sensor 22. The heating element 21 is preferably but not limited to a resistance wire. The heating element 21 is used to release heat, and the temperature sensor 22 is used to detect the temperature to adjust the power and temperature of the heating element 21 according to the detected temperature.

[0102] Preferably, the second end of the flow channel plate 11 is provided with a first mounting groove for embedding the heating element 21 and a second mounting groove for embedding the temperature sensor 22. In two adjacent flow channel assemblies 1, the first mounting groove at the bottom end of the flow channel plate 11 located at the bottom in the upper flow channel assembly 1 (i.e., the second end of the flow channel plate 11) and the first mounting groove at the top end of the flow channel plate 11 located at the top in the lower flow channel assembly 1 (i.e., the second end of the flow channel plate 11) are arranged oppositely and connected to each other for mounting the same heating element 21. The second mounting groove at the bottom end of the flow channel plate 11 located at the bottom in the upper flow channel assembly 1 (i.e., the second end of the flow channel plate 11) and the second mounting groove at the top end of the flow channel plate 11 located at the top in the lower flow channel assembly 1 (i.e., the second end of the flow channel plate 11) are arranged oppositely and connected to each other for mounting the same temperature sensor 22.

[0103] The heating element 21 and the temperature sensor 22 are both arranged corresponding to at least two catalytic channels 113. In other words, the heating element 21 and the temperature sensor 22 are arranged within the end surface projection area of ​​the at least two catalytic channels 113 at the second end. Preferably, the heating element 21 and the temperature sensor 22 are arranged within the end surface projection of the catalytic zone 1162 at the second end.

[0104] In some embodiments, the ammonia cracking hydrogen production device of the embodiment of the present invention further includes a first sealing ring 3, which is arranged between the first ends of adjacent flow channel plates 11 in the flow channel assembly 1, and the first sealing ring 3 at least surrounds the outer circumference of at least two catalytic flow channels 113.

[0105] like Figure 1 , Figure 4 and Figure 5 As shown, a first sealing ring 3 is provided between the bottom end of the upper flow channel plate 11 (i.e., the first end of the flow channel plate 11) and the top end of the lower flow channel plate 11 (i.e., the first end of the flow channel plate 11) in the flow channel assembly 1, and the first sealing ring 3 surrounds the outer periphery of all catalytic flow channels 113 of the two flow channel plates 11.

[0106] The first sealing ring 3 prevents the ammonia gas in the catalytic flow channel 113 from leaking from between the first ends of adjacent flow channel plates 11 .

[0107] Preferably, the first sealing ring 3 surrounds the outer periphery of the grooves 116 that are arranged opposite to and connected to the two flow channel plates 11. In other words, the first sealing ring 3 surrounds the outer periphery of the connected branch flow channel 114, the catalytic flow channel 113 and the converging flow channel 115. The first sealing ring 3 also surrounds the outer periphery of the catalyst sheet 12 between the two flow channel plates 11. The first sealing ring 3 is used to further prevent the ammonia gas in the branch flow channel 114 and the converging flow channel 115 from leaking from the first ends of the adjacent flow channel plates 11.

[0108] Preferably, the end surface of the bottom end of the upper flow channel plate 11 (i.e., the first end of the flow channel plate 11) and the end surface of the top end of the lower flow channel plate 11 (i.e., the first end of the flow channel plate 11) are against each other to provide sealing. At the same time, the end surface of the first end of the flow channel plate 11 is provided with a first sealing groove for installing the first sealing ring 3, and the first sealing ring 3 is embedded in the first sealing groove at the bottom end of the upper flow channel plate 11 and the first sealing groove at the top end of the lower flow channel plate 11.

[0109] In some embodiments, the ammonia cracking hydrogen production device of the embodiment of the present invention also includes a second sealing ring 4, the plate inlet 111 and the plate outlet 112 penetrate the flow channel plate 11, the first sealing ring 3 surrounds the plate inlet 111, the plate outlet 112 and the outer periphery of at least two catalytic flow channels 113, the second sealing ring 4 is arranged between the second ends of adjacent flow channel assemblies 1 that are relatively arranged, the second sealing ring 4 surrounds the outer periphery of the plate inlet 111 and the plate outlet 112, or, the outer periphery of the plate inlet 111 surrounds one second sealing ring 4, and the outer periphery of the plate outlet 112 surrounds another second sealing ring 4.

[0110] like Figure 1-Figure 4 As shown, the plate inlet 111 and the plate outlet 112 penetrate the flow channel plate 11 in the up-down direction, and the first sealing ring 3 surrounds the outer periphery of the connected plate inlet 111, the groove 116 and the plate outlet 112. In other words, the first sealing ring 3 surrounds the outer periphery of the connected plate inlet 111, the branch channel 114, the catalytic channel 113, the confluence channel 115 and the plate outlet 112, so as to further prevent the ammonia gas in the plate inlet 111 and the plate outlet 112 from leaking from the first ends of the adjacent flow channel plates 11 through the first sealing ring 3.

[0111] In two adjacent flow channel assemblies 1, a second sealing ring 4 is provided between the bottom end of the flow channel plate 11 located below in the upper flow channel assembly 1 (i.e., the second end of the flow channel plate 11) and the top end of the flow channel plate 11 located above in the lower flow channel assembly 1 (i.e., the second end of the flow channel plate 11). The second sealing ring 4 preferably, but not limited to, surrounds the outer periphery of the plate inlet 111 and the plate outlet 112 at the same time, so as to prevent the ammonia gas in the plate inlet 111 and the plate outlet 112 from leaking from between the adjacent flow channel assemblies 1 through the second sealing ring 4.

[0112] Preferably, in two adjacent flow channel assemblies 1, the end surface of the bottom end of the flow channel plate 11 located at the bottom in the upper flow channel assembly 1 (i.e., the second end of the flow channel plate 11) abuts against the end surface of the top end of the flow channel plate 11 located at the top in the lower flow channel assembly 1 (i.e., the second end of the flow channel plate 11) to provide sealing. At the same time, the end surface of the second end of the flow channel plate 11 is provided with a second sealing groove for installing the second sealing ring 4, and the second sealing ring 4 is simultaneously embedded in the second sealing groove at the bottom end of the flow channel plate 11 above the second sealing ring 4 and the second sealing groove at the top end of the flow channel plate 11 below the second sealing ring 4.

[0113] It can be understood that the second sealing ring is not limited to surrounding the periphery of both the plate inlet and the plate outlet. In other embodiments, two second sealing grooves are provided at the second end of the flow channel plate, one of which surrounds the periphery of the plate inlet and the other surrounds the periphery of the plate outlet, and the two second sealing grooves are respectively provided with corresponding second sealing rings.

[0114] In some embodiments, the ammonia cracking hydrogen production device of the embodiment of the present invention also includes an outer shell 5, which is provided with a shell inlet 51, an inner cavity 52 and a shell outlet 53 that are connected, and at least two stacked flow channel assemblies 1 are provided in the inner cavity 52, each plate inlet 111 is connected to the shell inlet 51, and each plate outlet 112 is connected to the shell outlet 53.

[0115] like Figure 4 As shown, a plurality of flow channel assemblies 1 stacked in a vertical direction are provided in the inner cavity 52 of the outer shell 5, and the plate inlets 111 of all the flow channel plates 11 in the plurality of flow channel assemblies 1 are preferably but not limited to being connected in sequence in the up-and-down direction, and the plate outlets 112 of all the flow channel plates 11 in the plurality of flow channel assemblies 1 are preferably but not limited to being connected in sequence in the up-and-down direction.

[0116] The outer shell 5 is also provided with a shell inlet 51 and a shell outlet 53 arranged at intervals in the left-right direction. The shell inlet 51 and the shell outlet 53 are both connected to the top of the inner cavity 52. ​​The shell inlet 51 is connected to the top of the uppermost plate inlet 111 so that the shell inlet 51 is preferably but not limited to being connected to all the plate inlets 111 in sequence along the vertical direction. The shell outlet 53 is connected to the top of the uppermost plate outlet 112 so that the shell outlet 53 is preferably but not limited to being connected to all the plate outlets 112 in sequence along the vertical direction.

[0117] When the ammonia cracking hydrogen production device is in operation, ammonia enters the plate inlets 111 connected in sequence from the shell inlet 51, and is then cracked in the corresponding catalytic flow channel 113. The cracked gas enters the plate outlets 112 connected in sequence, and is then discharged through the shell outlet 53. Therefore, the ammonia cracking efficiency of the ammonia cracking hydrogen production device is high.

[0118] The housing 5 serves to fix and protect the plurality of flow channel components 1 and also serves to keep the ammonia gas warm.

[0119] Preferably, both the shell inlet 51 and the shell outlet 53 are provided with joints protruding from the outer wall surface of the shell 5 for connecting pipelines.

[0120] In some embodiments, the outer shell 5 includes an insulating cotton shell 54 and a fixing part 55. The insulating cotton shell 54 is provided with a shell inlet 51, an inner cavity 52 and a shell outlet 53. The fixing part 55 is arranged in the insulating cotton shell 54, and the flow channel plate 11 abuts against the fixing part 55 at least at two ends along a direction orthogonal to the stacking direction.

[0121] like Figure 4 As shown, the outer shell 5 includes a heat-insulating cotton shell 54 and a fixing part 55. The heat-insulating cotton shell 54 is provided with a shell inlet 51, an inner cavity 52 and a shell outlet 53. The heat-insulating cotton shell 54 is preferably but not limited to provided with two fixing parts 55. One of the fixing parts 55 is provided on the left side of the inner cavity 52 and forms the left cavity wall surface of the inner cavity 52. ​​The other fixing part 55 is provided on the right side of the inner cavity 52 and forms the right cavity wall surface of the inner cavity 52. ​​Each flow channel plate 11 is abutted between the two fixing parts 55.

[0122] The fixing member 55 plays a role in fixing and limiting the flow channel plate 11, and the heat insulating cotton shell 54 plays a role in keeping the ammonia gas warm.

[0123] In some embodiments, the housing 5 further includes a sensor assembly 56 , which is used to detect hydrogen and nitrogen. The sensor assembly 56 is disposed in the heat-insulating cotton shell 54 .

[0124] like Figure 4 As shown, the housing 5 also includes a sensor assembly 56, which includes an oxygen sensor and a nitrogen sensor. The oxygen sensor and the nitrogen sensor are both inserted into the heat-insulating cotton shell 54 to detect hydrogen and nitrogen, and send out signals when hydrogen and nitrogen are detected, thereby avoiding leakage of hydrogen and nitrogen.

[0125] In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0126] In addition, the terms "first" and "second" are only used for distinction, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0127] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0128] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0129] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0130] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An ammonia cracking hydrogen production device, characterized in that: include: A flow channel assembly (1), the flow channel assembly (1) comprising a flow channel plate (11) and a catalyst sheet (12), the flow channel plate (11) being provided with a plate inlet (111), a plate outlet (112) and at least two catalytic flow channels (113), at least two of the catalytic flow channels (113) being connected in parallel between the plate inlet (111) and the plate outlet (112), the catalyst sheet (12) being provided on the flow channel plate (11) and being arranged side by side with the at least two of the catalytic flow channels (113).

2. The ammonia cracking hydrogen production device according to claim 1, characterized in that: The flow channel plate (11) is further provided with a branch channel (114) and a confluence channel (115); the branch channel (114) is connected between the plate inlet (111) and at least two of the catalytic flow channels (113) and is used to branch the ammonia gas provided by the plate inlet (111) to at least two of the catalytic flow channels (113); the confluence channel (115) is connected between the plate outlet (112) and at least two of the catalytic flow channels (113) and is used to converge the ammonia gas in at least two of the catalytic flow channels (113) to the plate outlet (112).

3. The ammonia cracking hydrogen production device according to claim 2, characterized in that: At least one end surface of the flow channel plate (11) is provided with a groove (116), a plurality of flow guide ridges (119) arranged side by side are provided in the groove (116), and the catalytic flow channel (113) is formed on both sides of each of the flow guide ridges (119).

4. The ammonia cracking hydrogen production device according to claim 3, characterized in that: The protruding height of the guide convex strip (119) is lower than the depth of the groove (116); at least a portion of the catalyst sheet (12) is disposed in the groove (116) and abuts against a plurality of the guide convex strips (119).

5. The ammonia cracking hydrogen production device according to claim 4, characterized in that: The groove (116) is divided into a diversion area (1161), a catalytic area (1162) and a confluence area (1163) from the plate inlet (111) to the plate outlet (112); the diversion area (1161) is provided with a plurality of dispersed diversion protrusions (117) to form the diversion channel (114); the confluence area (1163) is provided with a plurality of dispersed confluence protrusions (118) to form the confluence channel (115); the catalytic area (1162) is provided with the guide protrusion (119); and the catalyst sheet (12) is at least provided in the catalytic area (1162).

6. The ammonia cracking hydrogen production device according to claim 5, characterized in that: Along the direction from the plate inlet (111) to the plate outlet (112), the cross-section of the diversion area (1161) increases, the diversion bosses (117) are arranged in at least two rows arranged at intervals, and the number of the diversion bosses (117) in the front row is less than the number of the diversion bosses (117) in the rear row, and the cross-section of the confluence area (1163) decreases, the confluence bosses (118) are arranged in at least two rows arranged at intervals, and the number of the confluence bosses (118) in the front row is less than the number of the confluence bosses (118) in the rear row.

7. The ammonia cracking hydrogen production device according to claim 1, characterized in that: The flow channel assembly (1) comprises at least two stacked flow channel plates (11), the catalyst sheet (12) being arranged between the catalytic flow channels (113) of two adjacent flow channel plates (11), and the plate inlets (111) of two adjacent flow channel plates (11) being connected, and the plate outlets (112) of two adjacent flow channel plates (11) being connected.

8. The ammonia cracking hydrogen production device according to claim 7, characterized in that: The flow channel assemblies (1) are at least two stacked together, the flow channel plate (11) comprising a first end and a second end, the first end of the flow channel plate (11) being provided with at least two catalytic flow channels (113), the first ends of adjacent flow channel plates (11) in the flow channel assemblies (1) being arranged opposite to each other, and the catalyst sheet (12) being provided between the first ends of adjacent flow channel plates (11), and in adjacent flow channel assemblies (1), the second end of the outermost flow channel plate (11) of one of the flow channel assemblies (1) is arranged opposite to the second end of the outermost flow channel plate (11) of another of the flow channel assemblies (1).

9. The ammonia cracking hydrogen production device according to claim 1 or 8, characterized in that: It also comprises a heating component (2), wherein the heating component (2) is used to heat the ammonia in the catalytic flow channel (113).

10. The ammonia cracking hydrogen production device according to claim 9, characterized in that: The heating component (2) is arranged between adjacent flow channel components (1).

11. The ammonia cracking hydrogen production device according to claim 10, characterized in that: The heating component (2) comprises a heating element (21) and a temperature sensor (22), and the heating element (21) and the temperature sensor (22) are both arranged corresponding to at least two of the catalytic flow channels (113).

12. The ammonia cracking hydrogen production device according to claim 8, characterized in that: It also comprises a first sealing ring (3), wherein the first sealing ring (3) is arranged between the first ends of adjacent flow channel plates (11) in the flow channel assembly (1), and the first sealing ring (3) at least surrounds the outer periphery of at least two of the catalytic flow channels (113).

13. The ammonia cracking hydrogen production device according to claim 12, characterized in that: It also includes a second sealing ring (4), the plate inlet (111) and the plate outlet (112) pass through the flow channel plate (11), the first sealing ring (3) surrounds the outer periphery of the plate inlet (111), the plate outlet (112) and at least two of the catalytic flow channels (113), the second sealing ring (4) is arranged between the second ends of adjacent flow channel assemblies (1) that are arranged opposite to each other, the second sealing ring (4) surrounds the outer periphery of the plate inlet (111) and the plate outlet (112), or the outer periphery of the plate inlet (111) surrounds one second sealing ring (4), and the outer periphery of the plate outlet (112) surrounds another second sealing ring (4).

14. The ammonia cracking hydrogen production device according to claim 1, characterized in that: The invention also comprises an outer shell (5), wherein the outer shell (5) is provided with a shell inlet (51), an inner cavity (52) and a shell outlet (53) which are connected to each other, wherein at least two of the flow channel assemblies (1) are stacked in the inner cavity (52), each of the plate inlets (111) is connected to the shell inlet (51), and each of the plate outlets (112) is connected to the shell outlet (53).

15. The ammonia cracking hydrogen production device according to claim 14, characterized in that: The outer shell (5) comprises a heat-insulating cotton shell (54) and a fixing member (55); the heat-insulating cotton shell (54) is provided with the shell inlet (51), the inner cavity (52) and the shell outlet (53); the fixing member (55) is arranged in the heat-insulating cotton shell (54); and the flow channel plate (11) abuts against the fixing member (55) at least at two ends along a direction orthogonal to the stacking direction.

16. The ammonia cracking hydrogen production device according to claim 15, characterized in that: The housing (5) further comprises a sensor assembly (56), wherein the sensor assembly (56) is used to detect hydrogen and nitrogen, and the sensor assembly (56) is arranged on the heat-insulating cotton housing (54).

17. The ammonia cracking hydrogen production device according to claim 1, characterized in that: The flow channel plate (11) is made of ceramic material, and the catalyst sheet (12) comprises a substrate and an ammonia cracking catalyst coating coated on the surface of the substrate.

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