Hydrogen production plant by ammonia cracking

Abstract

The embodiment of the present application 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 in parallel between the plate inlet and the plate outlet, and the catalyst sheet is arranged on the flow channel plate and arranged side by side with the at least two catalytic flow channels. The ammonia cracking hydrogen production device provided by the embodiment of the present application simultaneously cracks ammonia through the at least two catalytic flow channels, so that the hydrogen production efficiency is high. Meanwhile, the structure of the catalyst sheet and the flow channel plate is simple, and the catalyst sheet is convenient to install and replace, so that the ammonia cracking hydrogen production device provided by the embodiment of the present application is simple in structure and low in manufacturing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydrogen production, in particular to an ammonia cracking hydrogen production device. BACKGROUND

[0002] Ammonia cracking hydrogen production is a process of producing hydrogen and nitrogen by heating ammonia and decomposing under the action of a catalyst. In the related art, an ammonia cracking hydrogen production device has an inner cavity with a ring-shaped cross section, and a spiral guide plate coated with a catalyst is arranged in the inner cavity to form a spiral flow channel in the inner cavity. 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

[0003] The present application aims to at least partially solve one of the technical problems in the related art.

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

[0005] The ammonia cracking hydrogen production device of the embodiment of the present application comprises:

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

[0007] The ammonia cracking hydrogen production device of the embodiment of the present application has the following advantages. Ammonia enters the at least two catalytic flow channels from the plate inlet of the flow channel plate, and in the process of flowing through the catalytic flow channels, it contacts the catalyst of the catalyst sheet, thereby cracking to generate hydrogen and nitrogen. The generated hydrogen and nitrogen are discharged from the plate outlet. The ammonia cracking hydrogen production device of the embodiment of the present application simultaneously cracks ammonia through the 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 the catalyst sheet is easy to install and replace, the ammonia cracking hydrogen production device of the embodiment of the present application has a simple structure and a low manufacturing cost.

[0008] In some embodiments, the flow channel plate is further provided with a shunt channel and a converging channel, the shunt channel being connected between the plate inlet and the at least two catalytic flow channels for shunting the ammonia provided by the plate inlet to the at least two catalytic flow channels, and the converging channel being connected between the plate outlet and the at least two catalytic flow channels for converging the ammonia in the at least two 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 flow guide protrusions are arranged side by side in the groove, and the two sides of each flow guide protrusion form the catalytic flow channel.

[0010] In some embodiments, the protrusion height of the flow guide protrusion is lower than the depth of the groove, and at least part of the catalyst sheet is arranged in the groove and abuts against the plurality of flow guide protrusions.

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

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

[0013] In some embodiments, the flow channel assembly comprises at least two flow channel plates stacked together, the catalyst sheet is arranged between the catalytic flow channels of adjacent flow channel plates, and the plate inlets of adjacent flow channel plates are communicated.

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

[0015] In some embodiments, the ammonia cracking hydrogen production device further comprises a heating assembly for heating ammonia gas in the catalytic flow channel.

[0016] In some embodiments, the heating assembly is arranged between adjacent flow channel assemblies.

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

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

[0019] In some embodiments, the ammonia cracking hydrogen production device further comprises a second sealing ring, the plate inlet and the plate outlet pass through the flow channel plate, the first sealing ring surrounds the outer periphery of the plate inlet, the plate outlet and at least two of the catalytic flow channels, the second sealing ring is arranged between the oppositely arranged second ends of the adjacent flow channel assemblies, 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 of the second sealing rings, and the outer periphery of the plate outlet surrounds another of the second sealing rings.

[0020] In some embodiments, the ammonia cracking hydrogen production device further comprises a housing, the housing is provided with a housing inlet, an inner cavity and a housing outlet in communication, the inner cavity is provided with at least two of the flow channel assemblies stacked, each of the plate inlets is in communication with the housing inlet, and each of the plate outlets is in communication with the housing outlet.

[0021] In some embodiments, the housing comprises a heat insulation cotton shell and a fixing element, the heat insulation cotton shell is provided with the housing inlet, the inner cavity and the housing outlet, the fixing element is arranged in the heat insulation cotton shell, and the flow channel plates abut against the fixing elements at least at two ends along a direction orthogonal to the stacking direction.

[0022] In some embodiments, the housing further comprises a sensor assembly for detecting hydrogen and nitrogen, and the sensor assembly is arranged in the heat insulation cotton shell.

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

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

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

[0026] Figure 3 FIG. 3 is a schematic view of the installation of the flow channel plate and the catalyst sheet of the ammonia cracking hydrogen production device according to an embodiment of the present application;

[0027] Figure 4 is a front sectional view of the ammonia cracking hydrogen production device of the embodiment of the present application;

[0028] Figure 5 is a side sectional view of the flow channel assembly of the ammonia cracking hydrogen production device of the embodiment of the present application.

[0029] Reference signs:

[0030] 1, flow channel assembly; 11, flow channel plate; 111, plate inlet; 112, plate outlet; 113, catalytic flow channel; 114, branch flow channel; 115, convergent flow channel; 116, groove; 1161, branch flow region; 1162, catalytic region; 1163, convergent flow region; 117, branch flow protrusion; 118, convergent flow protrusion; 119, flow guide protrusion; 12, catalyst sheet;

[0031] 2, heating assembly; 21, heating piece; 22, temperature sensor;

[0032] 3, first sealing ring;

[0033] 4, second sealing ring;

[0034] 5, shell; 51, shell inlet; 52, inner cavity; 53, shell outlet; 54, heat insulation cotton shell body; 55, fixing piece; 56, sensor assembly. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0036] The following refers to Figures 1-5 The ammonia cracking hydrogen production device according to the embodiment of the present application is described.

[0037] As shown in Figures 1-5 , the ammonia cracking hydrogen production device of the embodiment of the present application comprises a flow channel assembly 1.

[0038] The flow channel assembly 1 comprises 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, and the at least two catalytic flow channels 113 are connected in parallel between the plate inlet 111 and the plate outlet 112. For example, as shown in Figure 1 , the flow channel assembly 1 is preferably but not limited to horizontally arranged, the plate inlet 111 and the plate outlet 112 are preferably but not limited to arranged in intervals along the left-right direction, and 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 arranged in intervals along the front-rear direction to be connected in parallel between the plate inlet 111 and the plate outlet 112.

[0039] The catalyst sheet 12 is arranged on the flow channel plate 11 and is arranged side by side with the at least two catalytic flow channels 113. For example, as shown in FIG. 1, the catalyst sheet 12 is preferably but not limited to arranged horizontally, and the catalyst sheet 12 is arranged on the flow channel plate 11, and the catalyst sheet 12 preferably but not limited to covers a plurality of catalytic flow channels 113. Figure 3

[0040] In use of the ammonia cracking hydrogen production device, ammonia gas enters the 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, so as to be cracked to generate hydrogen gas and nitrogen gas, and the generated hydrogen gas and nitrogen gas are discharged from the plate outlet 112.

[0041] It can be understood that if the ammonia gas is not completely cracked in the catalytic flow channels 113, the gas discharged from the plate outlet 112 contains residual ammonia gas which is not cracked.

[0042] The ammonia cracking hydrogen production device of the embodiment of the present application has high hydrogen production efficiency by cracking the ammonia gas through the at least two catalytic flow channels simultaneously, and the structure of the catalyst sheet and the flow channel plate is simple and the catalyst sheet is easy to install and replace, so that the ammonia cracking hydrogen production device of the embodiment of the present application has simple structure and low manufacturing cost.

[0043] In some embodiments, the catalyst sheet 12 comprises 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 gas flowing through the catalytic flow channels 113, so as to crack the ammonia gas into hydrogen gas and nitrogen gas, and the ammonia cracking catalyst coating is preferably but not limited to Ru-Al2O3 catalyst.

[0045] The substrate is preferably but not limited to carbon paper or foamed metal foil, so as to facilitate coating of the ammonia cracking catalyst coating.

[0046] In some embodiments, the flow channel plate 11 is preferably but not limited to made of ceramic material, so as to facilitate processing, and has low cost, high temperature resistance and acid and alkali resistance.

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

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

[0049] As Figure 1 shown, the flow channel plate 11 is further provided with a branch flow channel 114 and a converging flow channel 115. The left end of the branch flow channel 114 is connected to the plate inlet 111, and the right end of the branch flow channel 114 is connected to a plurality of catalytic flow channels 113 in parallel. The branch flow channel 114 is used to divide the ammonia gas provided by the plate inlet 111, so that the ammonia gas uniformly enters the plurality of catalytic flow channels 113.

[0050] The left end of the converging flow channel 115 is connected to the plurality of catalytic flow channels 113 in parallel, and the right end of the converging flow channel 115 is connected to the plate outlet 112. The converging flow channel 115 is used to converge the gas discharged from the plurality of catalytic flow channels 113, and then supply the gas to the plate outlet 112, so that the gas is discharged from the flow channel assembly 1 through the plate outlet 112.

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

[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 flow guide protrusions 119 are arranged side by side in the groove 116. Each flow guide protrusion 119 is formed on both sides of the flow guide protrusion 119.

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

[0054] The groove 116 is provided with the flow guide protrusion 119, and the flow guide protrusion 119 preferably extends in the left-right direction, but is not limited thereto. The flow guide protrusion 119 protrudes from the groove bottom surface of the groove 116. The flow guide protrusion 119 is preferably a plurality of flow guide protrusions 119. The plurality of flow guide protrusions 119 are arranged in the front-rear direction. The catalytic flow channel 113 is formed between adjacent two flow guide protrusions 119. The catalytic flow channel 113 is also formed between the flow guide protrusion 119 located at the outermost side in the front-rear direction and the side wall surface of the groove 116. Thus, a plurality of catalytic flow channels 113 are formed in the groove 116 by the flow guide protrusions 119.

[0055] The width of the plurality of catalytic flow channels 113 in the front-rear direction is preferably the same. In other embodiments, the width of the plurality of catalytic flow channels 113 can also be different. The width of the catalytic flow channel 113 is used to adjust the flow rate of the ammonia gas in the catalytic flow channel 113, so that the ammonia gas uniformly flows in the plurality of catalytic flow channels 113.

[0056] When the catalyst plate 12 is installed on the flow channel plate 11, the catalyst plate 12 covers multiple catalytic flow channels 113 through the groove 116 so that when the ammonia gas flows through the catalytic flow channel 113, it comes into contact with the catalyst plate 12 and is cracked, and the structure of the flow channel assembly 1 is simple, which facilitates the installation and replacement of the catalyst plate 12.

[0057] It is understood that the guide strip is not limited to a strip extending in the left-right direction. In other embodiments, the guide strip is a wavy curve extending in the left-right direction, or, when the plate inlet and plate outlet are arranged obliquely in the left-right direction, the guide strip is an arc or a quarter circle.

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

[0059] like Figure 3 and Figure 5 As shown, the height of the protrusion of the guide strip 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 face of the first end of the flow channel plate 11 and the end face of the guide strip 119. The catalyst sheet 12 is embedded in the groove 116 along its thickness direction, and abuts against the multiple guide strips 119, so that the catalyst sheet 12 covers the multiple catalytic flow channels 113, ensuring that the ammonia gas is cracked when it flows through the catalytic flow channel 113, and at the same time facilitating the installation and replacement of the catalyst sheet 12.

[0060] It is 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 face of the first end.

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

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

[0063] The distribution area 1161 is provided with a plurality of distribution protrusions 117 protruding from the groove bottom surface of the groove 116, and the plurality of distribution protrusions 117 are preferably but not limited to cylindrical. The plurality of distribution protrusions 117 are dispersedly arranged in the distribution area 1161. In other words, the plurality of distribution protrusions 117 are arranged in the distribution area 1161 in a spaced manner. Thus, the distribution area 1161 forms a distribution channel 114.

[0064] The catalytic area 1162 is provided with a plurality of guide protrusions 119 extending in the left-to-right direction and arranged in the front-to-back direction in a spaced manner. Thus, the plurality of guide protrusions 119 form a plurality of catalytic flow channels 113 in the catalytic area 1162.

[0065] The catalyst sheet 12 is embedded in the catalytic area 1162 in the entire or part of the thickness direction, thereby covering the plurality of catalytic flow channels 113.

[0066] The converging area 1163 is provided with a plurality of converging protrusions 118 protruding from the groove bottom surface of the groove 116, and the plurality of converging protrusions 118 are preferably but not limited to cylindrical. The plurality of converging protrusions 118 are dispersedly arranged in the converging area 1163. In other words, the plurality of converging protrusions 118 are arranged in the converging area 1163 in a spaced manner. Thus, the converging area 1163 forms a converging channel 115.

[0067] During the operation of the ammonia cracking hydrogen production device, ammonia enters the distribution area 1161 from the plate inlet 111 and then flows to the right. The ammonia is blocked by the distribution protrusions 117 during the flow in the distribution area 1161, so as to be dispersed by the plurality of distribution protrusions 117, thereby making the ammonia uniformly enter the plurality of catalytic flow channels 113 in the catalytic area 1162. The ammonia is guided to move in the catalytic flow channels 113 by the guide protrusions 119 and contacts the ammonia cracking catalyst coating of the catalyst sheet 12, so as to be cracked to form hydrogen and nitrogen. The gas after cracking enters the converging area 1163 from the catalytic flow channels 113 and flows to the right. The gas is blocked by the converging protrusions 118 during the flow in the converging area 1163, so as to be converged by the plurality of converging protrusions 118, thereby making the gas enter the plate outlet 112.

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

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

[0070] It can be understood that the distribution channel and the converging channel are not limited to be formed by the protrusions in the groove. In other embodiments, the distribution channel and the converging channel are grid-shaped channels arranged in the first end of the flow channel plate, or the distribution channel and the converging channel are grid-shaped channels arranged inside the flow channel plate.

[0071] It can be understood that the catalyst sheet is not limited to be arranged in the catalytic area. In other embodiments, the end face of the converging protrusion, the end face of the distribution protrusion and the end face of the flow guide protrusion are flush with each other and are lower than the end face of the first end of the flow channel plate, and the catalyst sheet is embedded in the distribution area, the catalytic area and the converging area at the same time and abuts against the converging protrusion, the distribution protrusion and the flow guide protrusion.

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

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

[0074] The distribution area 1161 is provided with a plurality of rows of distribution protrusions 117 arranged at intervals in the left-right direction, each row of the distribution protrusions 117 includes a plurality of distribution protrusions 117 arranged at intervals in the front-rear direction, and the number of the distribution protrusions 117 in the left row is less than the number of the distribution protrusions 117 in the right row. Thus, the distribution protrusions 117 are arranged at intervals, and the ammonia gas flowing in the distribution area 1161 is fully dispersed to make the ammonia gas evenly enter the plurality of catalytic flow channels 113.

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

[0076] ​The confluence area 1163 is provided with a plurality of rows of confluence protruding columns 118 arranged at intervals in the left-right direction, each row of confluence protruding columns 118 includes a plurality of confluence protruding columns 118 arranged at intervals in the front-rear direction, and the number of confluence protruding columns 118 in the left row is greater than the number of confluence protruding columns 118 in the right row. Thus, the confluence protruding columns 118 are dispersedly arranged, and the ammonia gas flowing in the confluence area 1163 is fully collected and enters the plate outlet 112.

[0077] In some embodiments, the flow channel assembly 1 includes at least two flow channel plates 11 stacked together, a catalyst sheet 12 is arranged between the catalytic flow channels 113 of adjacent two flow channel plates 11, and the plate inlet 111 of adjacent two flow channel plates 11 is communicated.

[0078] As shown in Figs. Figure 4 and Figure 5 The flow channel assembly 1 includes at least two flow channel plates 11 stacked together in the vertical direction, the bottom end of the upper flow channel plate 11 and the top end of the lower flow channel plate 11 are each provided with a plurality of catalytic flow channels 113, and the catalyst sheet 12 is arranged 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 communicated, and the plate outlets 112 of the stacked flow channel plates 11 are communicated.

[0081] In other embodiments, the plate inlet and the plate outlet can also be grooves arranged on the end face of the flow channel plate, the plate inlet forms an opening on the left side face of the flow channel plate, the plate outlet forms an opening on the right side face of the flow channel plate, the plate inlet of the upper flow channel plate is arranged opposite to and communicated with the plate inlet of the lower flow channel plate, and the plate outlet of the upper flow channel plate is arranged opposite to and communicated with the plate outlet of the lower flow channel plate.

[0082] The ammonia gas is simultaneously supplied into the catalytic flow channels 113 of the upper flow channel plate 11 and the lower flow channel plate 11 through the plate inlets 111 communicated between the upper flow channel plate 11 and the lower flow channel plate 11, the catalyst sheet 12 simultaneously contacts with the ammonia gas in the catalytic flow channels 113 of the upper flow channel plate 11 and the lower flow channel plate 11 and cracks the ammonia gas, and the cracked gas is discharged through the communicated plate outlets 112, so that the flow channel assembly 1 can crack more ammonia gas and has a higher ammonia gas cracking efficiency.

[0083] It can be understood that the catalyst sheet is limited to be arranged between the adjacent two flow channel plates, and in other embodiments, the flow channel plates are stacked, and the top end of each flow channel plate is provided with a catalytic flow channel and connected to the catalyst plate, and the bottom end of each flow channel plate is not provided with a catalytic flow channel.

[0084] In some embodiments, the flow channel assembly 1 is stacked at least two, 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 the adjacent flow channel plates 11 in the flow channel assembly 1 are arranged oppositely, and the catalyst sheet 12 is arranged between the first ends of the adjacent flow channel plates 11, and the second end of the outermost flow channel plate 11 in one of the adjacent flow channel assemblies 1 is arranged oppositely to the second end of the outermost flow channel plate 11 in the other of the adjacent flow channel assemblies 1.

[0085] As shown in Figures 1-5 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 the first end provided with the groove 116, and the catalyst sheet 12 is arranged 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 the second end.

[0086] Preferably, the groove 116 is divided into a distribution area 1161, a catalytic area 1162 and a converging 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 distribution area 1161 of the upper flow channel plate 11 is arranged oppositely and communicated with the distribution area 1161 of the lower flow channel plate, so as to distribute the large amount of ammonia gas supplied into the plate inlet 111, so that the ammonia gas uniformly enters the catalytic flow channels 113 of the upper flow channel plate 11 and the lower flow channel plate.

[0088] The converging area 1163 of the upper flow channel plate 11 is arranged oppositely and communicated with the converging area 1163 of the lower flow channel plate, so as to converge the gas discharged from the catalytic flow channels 113 of the upper flow channel plate 11 and the lower flow channel plate, thereby being discharged through the communicated plate outlet 112.

[0089] It can be understood that in other embodiments, the catalyst sheet can also be arranged between the bottom surface of the upper flow channel plate and the top surface of the lower flow channel plate.

[0090] As shown in Figures 1-5As shown, the flow channel assembly 1 is preferably, but not limited to, a plurality of flow channel assemblies stacked in a vertical direction. In two adjacent flow channel assemblies 1, the bottom end (i.e., the second end of the flow channel plate 11) of the lower flow channel plate 11 in the upper flow channel assembly 1 is positioned opposite to the top end (i.e., the second end of the flow channel plate 11) of the upper flow channel plate 11 in the lower flow channel assembly 1.

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

[0092] It is understood 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, with a catalyst sheet provided between each adjacent flow channel plate. Each flow channel plate has a catalytic channel on its end face adjacent to another flow channel plate. In other words, among the multiple flow channel plates, the inner end faces of the two outermost flow channel plates in the stacking direction have catalytic channels, and the two end faces of the remaining flow channel plates have catalytic channels.

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

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

[0095] 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 temperature required for the cracking reaction.

[0096] It is understood that in other embodiments, ammonia may be heated outside the flow channel assembly and then the heated ammonia may be supplied into 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 assemblies 1. In other words, in two adjacent flow channel assemblies 1, a heating component 2 is provided between the bottom end (i.e., the second end of the flow channel plate 11) of the lower flow channel plate 11 in the upper flow channel assembly 1 and the top end (i.e., the second end of the flow channel plate 11) of the upper flow channel plate 11 in the lower flow channel assembly 1.

[0099] The heating component 2 simultaneously heats the ammonia gas in the catalytic flow channel 113 of the two adjacent flow channel components 1, thereby reducing energy consumption, simplifying the structure of the ammonia cracking hydrogen production device, facilitating the installation of the heating component 2, and avoiding interference between the heating component 2 and the catalyst plate 12.

[0100] In some embodiments, the heating assembly 2 comprises heating elements 21 and temperature sensors 22, both of which are arranged corresponding to at least two catalytic flow channels 113.

[0101] As shown in Figure 2 and Figure 4 , the heating assembly 2 comprises heating elements 21 and temperature sensors 22, the heating elements 21 are preferably but not limited to electric heating wires, and the heating elements 21 are used to release heat, and the temperature sensors 22 are used to detect temperature, so as to adjust the power and temperature of the heating elements 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 the adjacent two flow channel assemblies 1, the first mounting groove of the bottom end of the flow channel plate 11 in the upper flow channel assembly 1 (i.e. the second end of the flow channel plate 11) is arranged opposite to and communicates with the first mounting groove of the top end of the flow channel plate 11 in the lower flow channel assembly 1 (i.e. the second end of the flow channel plate 11), so as to mount the same heating element 21. The second mounting groove of the bottom end of the flow channel plate 11 in the upper flow channel assembly 1 (i.e. the second end of the flow channel plate 11) is arranged opposite to and communicates with the second mounting groove of the top end of the flow channel plate 11 in the lower flow channel assembly 1 (i.e. the second end of the flow channel plate 11), so as to mount the same temperature sensor 22.

[0103] The heating elements 21 and the temperature sensors 22 are arranged corresponding to at least two catalytic flow channels 113, in other words, the heating elements 21 and the temperature sensors 22 are arranged in the end face projection area of the second end of the at least two catalytic flow channels 113. Preferably, the heating elements 21 and the temperature sensors 22 are arranged in the end face projection of the second end of the catalytic area 1162.

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

[0105] As shown in Figure 1 , Figure 4 and Figure 5 , the first sealing ring 3 is arranged 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 the 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 channels 113 from leaking between the first ends of the adjacent flow channel plates 11.

[0107] Preferably, the first sealing ring 3 surrounds the outer periphery of the groove 116 that is oppositely disposed and communicates with the two flow channel plates 11. In other words, the first sealing ring 3 surrounds the outer periphery of the communicating branch channel 114, catalytic flow channel 113, and confluence channel 115. The first sealing ring 3 also surrounds the outer periphery of the catalyst sheet 12 between the two flow channel plates 11. This is to further prevent ammonia gas in the branch channel 114 and confluence channel 115 from leaking between the first ends of the adjacent flow channel plates 11.

[0108] Preferably, the end face of the bottom end (i.e., the first end of the flow channel plate 11) of the upper flow channel plate 11 and the end face of the top end (i.e., the first end of the flow channel plate 11) of the lower flow channel plate 11 abut against each other to achieve a seal. Simultaneously, the end face 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 simultaneously 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 apparatus of the present invention further includes a second sealing ring 4, a plate inlet 111 and a plate outlet 112 passing through the flow channel plate 11, a first sealing ring 3 surrounding the outer periphery of the plate inlet 111, the plate outlet 112 and at least two catalytic flow channels 113, and a second sealing ring 4 disposed between the oppositely disposed second ends of adjacent flow channel assemblies 1. 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 is surrounded by one second sealing ring 4 and the outer periphery of the plate outlet 112 is surrounded by another second sealing ring 4.

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

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

[0112] Preferably, in the two adjacent flow channel assemblies 1, the end face of the bottom end (i.e. the second end) of the flow channel plate 11 in the upper flow channel assembly 1 abuts the end face of the top end (i.e. the second end) of the flow channel plate 11 in the lower flow channel assembly 1, so as to have sealing property. Meanwhile, the end face of the second end of the flow channel plate 11 is provided with a second sealing groove for mounting the second sealing ring 4, and the second sealing ring 4 is embedded in the second sealing groove of the bottom end of the flow channel plate 11 above the second sealing ring 4 and the second sealing groove of 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 plate inlet and the plate outlet at the same time, and in other embodiments, the second end of the flow channel plate is provided with two second sealing grooves, one of which surrounds the plate inlet and the other of which surrounds 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 application further comprises a shell 5 provided with a shell inlet 51, an inner cavity 52 and a shell outlet 53 in communication, and the inner cavity 52 is provided with at least two flow channel assemblies 1 stacked therein, each plate inlet 111 is in communication with the shell inlet 51, and each plate outlet 112 is in communication with the shell outlet 53.

[0115] As shown in Figure 4 the inner cavity 52 of the shell 5 is provided with a plurality of flow channel assemblies 1 stacked in the vertical direction, 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 sequentially communicated in the up-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 sequentially communicated in the up-down direction.

[0116] The shell 5 is further provided with shell inlets 51 and shell outlets 53 arranged in the left-right direction, and the shell inlets 51 and the shell outlets 53 are connected above the inner cavity 52, the shell inlets 51 are connected above the uppermost plate inlets 111, so that the shell inlets 51 are preferably but not limited to sequentially communicated with all the plate inlets 111 in the vertical direction, and the shell outlets 53 are connected above the uppermost plate outlets 112, so that the shell outlets 53 are preferably but not limited to sequentially communicated with all the plate outlets 112 in the vertical direction.

[0117] During operation of the ammonia cracking hydrogen production device, ammonia gas enters the sequentially communicated plate inlets 111 from the shell inlets 51, and then is cracked in the corresponding catalytic flow channels 113, and the cracked gas enters the sequentially communicated plate outlets 112, and then is discharged through the shell outlets 53, so that the ammonia cracking hydrogen production device has high ammonia cracking efficiency.

[0118] The shell 5 plays a role in fixing and protecting the plurality of flow channel assemblies 1, and also plays a role in heat preservation of ammonia gas.

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

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

[0121] like Figure 4 As shown, the outer shell 5 includes a heat insulation cotton shell 54 and fixing members 55. The heat insulation cotton shell 54 is provided with a shell inlet 51, an inner cavity 52 and a shell outlet 53. Preferably, but not limited to, two fixing members 55 are provided inside the heat insulation cotton shell 54. One fixing member 55 is provided on the left side of the inner cavity 52 and forms the left side cavity wall of the inner cavity 52. ​​The other fixing member 55 is provided on the right side of the inner cavity 52 and forms the right side cavity wall of the inner cavity 52. ​​Each flow channel plate 11 abuts between the two fixing members 55.

[0122] The fastener 55 serves to fix and limit the flow channel plate 11, while the heat insulation cotton shell 54 serves to keep the ammonia gas warm.

[0123] In some embodiments, the housing 5 further includes a sensor assembly 56 for detecting hydrogen and nitrogen, and the sensor assembly 56 is disposed in the heat insulation housing 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. Both the oxygen sensor and the nitrogen sensor are inserted into the heat insulation cotton housing 54 to detect hydrogen and nitrogen, and to emit a signal when hydrogen and nitrogen are detected, thereby preventing hydrogen and nitrogen leakage.

[0125] In the description of this invention, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0126] In addition, the terms "first", "second", etc. are used only to identify different one of two or more objects at issue and are not otherwise intended to refer to relative importance or a number of the identified features. Thus, a feature defined with "first", "second" can include at least one of the feature explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0127] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0128] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "on", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0129] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples, without contradiction.

[0130] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An ammonia cracking hydrogen production device characterized by, The application relates to a flow channel assembly (1) comprising a flow channel plate (11) and a catalyst sheet (12), wherein the flow channel plate (11) is provided with a plate inlet (111), a plate outlet (112) and at least two catalytic flow channels (113) connected in parallel between the plate inlet (111) and the plate outlet (112), and the catalyst sheet (12) is arranged on the flow channel plate (11) and arranged side by side with the at least two catalytic flow channels (113). The flow channel plate (11) is further provided with a flow distribution channel (114) and a flow collection channel (115), wherein the flow distribution channel (114) is connected between the plate inlet (111) and the at least two catalytic flow channels (113) and used for distributing ammonia provided by the plate inlet (111) to the at least two catalytic flow channels (113), and the flow collection channel (115) is connected between the plate outlet (112) and the at least two catalytic flow channels (113) and used for collecting ammonia in the at least two catalytic flow channels (113) to the plate outlet (112). At least one end surface of the flow channel plate (11) is provided with a groove (116), and a plurality of flow guide protrusions (119) are arranged side by side in the groove (116), and the catalytic flow channels (113) are formed on both sides of each flow guide protrusion (119). The protrusion height of the flow guide protrusion (119) is lower than the depth of the groove (116), and at least part of the catalyst sheet (12) is arranged in the groove (116) and abuts against the plurality of flow guide protrusions (119). The groove (116) is divided into a flow distribution area (1161), a catalytic area (1162) and a flow collection area (1163) from the plate inlet (111) to the plate outlet (112), the flow distribution area (1161) is provided with a plurality of flow distribution protrusions (117) arranged in a scattered manner to form the flow distribution channel (114), the flow collection area (1163) is provided with a plurality of flow collection protrusions (118) arranged in a scattered manner to form the flow collection channel (115), and the catalytic area (1162) is provided with the flow guide protrusions (119), and the catalyst sheet (12) is arranged at least in the catalytic area (1162). In the direction from the plate inlet (111) to the plate outlet (112), the cross section of the flow distribution area (1161) increases, the flow distribution protrusions (117) are arranged in at least two rows in a spaced manner, the number of the flow distribution protrusions (117) in a previous row is smaller than that in a subsequent row, the cross section of the flow collection area (1163) decreases, the flow collection protrusions (118) are arranged in at least two rows in a spaced manner, and the number of the flow collection protrusions (118) in a previous row is smaller than that in a subsequent row.

2. The ammonia cracking hydrogen production apparatus according to claim 1, characterized by, ​ 3. The ammonia cracking hydrogen production apparatus according to claim 1, characterized by, The flow channel assembly (1) comprises at least two flow channel plates (11) stacked together, the catalyst pieces (12) are arranged between the catalytic flow channels (113) of adjacent flow channel plates (11), and the plate inlets (111) of adjacent flow channel plates (11) are communicated, and the plate outlets (112) of adjacent flow channel plates (11) are communicated.

4. The ammonia cracking device for hydrogen production according to claim 3, wherein The flow channel assembly (1) comprises at least two flow channel plates (11) stacked together, 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 assembly (1) are arranged oppositely, and the catalyst pieces (12) are arranged between the first ends of adjacent flow channel plates (11), and the second end of the outermost flow channel plate (11) in one of the flow channel assemblies (1) is arranged oppositely to the second end of the outermost flow channel plate (11) in the other flow channel assembly (1).

5. The ammonia cracking hydrogen production apparatus according to claim 1 or 4, characterized by, Further comprising a heating assembly (2) for heating the ammonia gas in the catalytic flow channels (113).

6. The ammonia cracking device for hydrogen production according to claim 5, wherein The heating assembly (2) is arranged between adjacent flow channel assemblies (1).

7. The ammonia cracking device for hydrogen production according to claim 6, wherein The heating assembly (2) comprises a heating element (21) and a temperature sensor (22), and the heating element (21) and the temperature sensor (22) are arranged correspondingly to at least two catalytic flow channels (113).

8. The ammonia cracking device for hydrogen production of claim 4, wherein, Further comprising a first sealing ring (3) arranged between the first ends of adjacent flow channel plates (11) in the flow channel assembly (1), and the first sealing ring (3) surrounds at least the outer periphery of at least two catalytic flow channels (113).

9. The ammonia cracking device for hydrogen production of claim 8, wherein, Further comprising 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 outer periphery of the plate inlet (111), the plate outlet (112) and at least two catalytic flow channels (113), the second sealing ring (4) is arranged between the oppositely arranged second ends of adjacent flow channel assemblies (1), 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).

10. The ammonia cracking device for hydrogen production of claim 1, wherein, Further comprising a housing (5) provided with a communicated shell inlet (51), an inner cavity (52) and a shell outlet (53), at least two flow channel assemblies (1) are arranged in the inner cavity (52) in a stacked manner, each plate inlet (111) is communicated with the shell inlet (51), and each plate outlet (112) is communicated with the shell outlet (53).

11. The ammonia cracking device for hydrogen production of claim 10, wherein, The shell (5) comprises a heat insulation cotton shell (54) provided with the shell inlet (51), the inner cavity (52) and the shell outlet (53), and a fixing member (55) arranged in the heat insulation cotton shell (54), and the flow channel plate (11) abuts against the fixing member (55) at least at two ends in a direction orthogonal to the stacking direction.

12. The ammonia cracking device for hydrogen production of claim 11, wherein, The shell (5) further comprises a sensor assembly (56) for detecting hydrogen and nitrogen, and the sensor assembly (56) is arranged in the heat insulation cotton shell (54).

13. The ammonia cracking device for hydrogen production of claim 1, wherein, The flow channel plate (11) is made of ceramic, and the catalyst sheet (12) comprises a substrate and an ammonia cracking catalyst coating layer coated on the surface of the substrate.

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