Contact reaction equipment and method for accelerating ammonia cracking hydrogen production

Abstract

The invention discloses equipment and a method for accelerating contact reaction of ammonia cracking hydrogen production, and relates to the technical field of ammonia cracking hydrogen production, the equipment comprises a cracking furnace, a furnace pipe is fixedly arranged in the cracking furnace, a fixed boss is fixedly arranged at the bottom end of the furnace pipe, a material blocking mechanism is arranged at the bottom end of the furnace pipe, and a vaporization box is fixedly arranged at the upper end in a connecting box; the input end of the vaporizing box is communicated with a liquid ammonia feeding pipe, the output end of the vaporizing box is communicated with a rotating joint, the rotating joint is rotatably arranged on a conveying pipe, and a conveying mechanism is arranged in the conveying pipe. The spiral plate is arranged on the mounting shaft, ammonia gas at one end of the conveying pipe is conveyed, the rotating pipe rotates while revolving, the rotating pipe turns over a catalyst through the multiple fixing plates at one end, the fixing plates are tightly attached to the bottom end of the interior of the furnace pipe, and then full contact reaction of the ammonia gas and the catalyst is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of ammonia cracking hydrogen production, and in particular to a device and method for accelerating ammonia cracking hydrogen production contact reaction. Background Art

[0002] With the growing global demand for clean energy, hydrogen has garnered widespread attention as an efficient, clean, and sustainable energy carrier. Ammonia, with its high hydrogen content and ease of storage and transportation, has become a highly promising hydrogen source. Ammonia cracking, which breaks ammonia down into hydrogen and nitrogen, has become an important method for producing hydrogen.

[0003] Existing ammonia decomposition equipment has significant limitations. Most use liquid ammonia as feedstock, which is vaporized and vaporized in a vaporizer at low pressure before entering a cracking furnace. The cracking furnace houses an internal electric furnace to provide the heat output required for ammonia decomposition. Ammonia enters the cracking furnace and, under the action of a catalyst, is cracked at high temperatures into a hydrogen-nitrogen mixture. Due to structural limitations and heat generation, the equipment is relatively small.

[0004] The authorization announcement number is: CN115180592B, which discloses a device and method for accelerating the contact reaction of ammonia cracking to produce hydrogen. The device can fully contact the ammonia in the cracking furnace with the catalyst by setting a stirring mechanism and a filter mechanism, thereby improving the hydrogen production efficiency. At the same time, the unloading mechanism is designed and optimized to facilitate the replacement of the catalyst. The method further promotes the contact between ammonia and the catalyst by combining multiple conditions such as catalyst particle size, spacing between stirring vertical rods, liquid ammonia introduction rate and stirring speed. However, when the above device is in use, the catalyst accumulates on the upper end of the filter, and the stirring mechanism can only disrupt the position of the catalyst, causing the catalyst to seal the filter. The vaporized ammonia is blocked by the catalyst, causing a large amount of vaporized ammonia to accumulate at the bottom of the furnace. The ammonia and catalyst can only react by increasing the ammonia pressure, which in turn causes the reaction efficiency of the ammonia and catalyst to be relatively slow.

[0005] Based on this, a device and method for accelerating the contact reaction of ammonia cracking to produce hydrogen is now provided, which can eliminate the disadvantages of existing devices. Summary of the Invention

[0006] The object of the present invention is to provide an apparatus and method for accelerating the contact reaction of ammonia cracking to produce hydrogen, so as to solve the problem of slow reaction efficiency between ammonia and catalyst in the background art.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A contact reaction device for accelerating ammonia cracking to produce hydrogen, comprising a cracking furnace, wherein a furnace liner is fixedly provided inside the cracking furnace, a solid feed pipe is connected to the furnace liner, one end of the solid feed pipe extends to the outside of the cracking furnace, a fixed boss is fixedly provided at the bottom end of the furnace liner, a plurality of through-holes are provided at the bottom end of the furnace liner, a material blocking mechanism for facilitating catalyst replacement is provided at the bottom end of the furnace liner, a connecting box is connected to the cracking furnace, a vaporizer is fixedly provided at the upper end of the connecting box, a liquid ammonia feed pipe is connected to the input end of the vaporizer, a rotary joint is connected to the output end of the vaporizer, the rotary joint is rotatably provided on a transmission pipe, a plurality of air inlet holes are provided at the outer side of the transmission pipe corresponding to the position of the rotary joint, a conveying mechanism for conveying ammonia is provided inside the transmission pipe, a filter is provided at the position corresponding to the position below the rotary joint inside the furnace liner, a first exhaust pipe is connected to the upper end of the furnace liner, and one end of the first exhaust pipe extends to the outside of the cracking furnace.

[0009] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0010] In an optional solution: a heater is provided below the vaporization box, the heater is fixed at the bottom end of the connecting box, a vortex plate is fixed inside the vaporization box, the vaporization box and the vortex plate are combined into a spiral channel, and a second exhaust pipe is provided at the upper end of the cracking furnace.

[0011] In an optional solution: the material blocking mechanism includes a material blocking rotating plate, which is symmetrically and tightly attached to the bottom end of the furnace, and the material blocking rotating plate is symmetrically provided with rotating columns, and the rotating columns are rotatably provided with rotating blocks, and the rotating blocks are fixed to the bottom end of the furnace, and the rotating columns on the same side are fixed with a first gear, and the two first gears are engaged with each other, and one of the rotating columns is fixedly connected to the output end of the first motor, and the first motor is fixed inside the cracking furnace.

[0012] In an optional solution, a material collecting cover is fixedly provided at the bottom end of the cracking furnace, and an output end of the material collecting cover extends to the outside of the cracking furnace.

[0013] In an optional scheme: the conveying mechanism includes a mounting shaft, which is arranged inside the transmission pipe, one end of the mounting shaft is rotatably arranged in the mounting groove at the bottom end of the transmission pipe, and the other end of the mounting shaft extends to the outside of the cracking furnace, the transmission pipe is rotatably arranged in the mounting groove at the upper end of the fixed boss, and a spiral plate is provided on the mounting shaft at a position corresponding to the internal position of the transmission pipe, the bottom end of the transmission pipe is symmetrically connected with a connecting pipe, one end of the connecting pipe is rotatably provided with a rotating pipe, the bottom end of the rotating pipe is provided with several fixed plates, the bottom end of the fixed plate is tightly attached to the bottom end of the furnace, the rotating pipe is located between the inside of the furnace and the outside of the fixed boss, the upper end of the transmission pipe is fixed with a sleeve shaft, one end of the sleeve shaft is fixed with a first bevel gear, and one end of the mounting shaft is fixed with a second bevel gear, the first bevel gear and the second bevel gear are both meshed with the third bevel gear, the third bevel gear is fixed at the output end of the second motor, and the second motor is fixed at the upper end of the cracking furnace.

[0014] In an optional solution: a second gear is fixedly provided at one end of each rotating tube, and both of the second gears are engaged with a gear ring, and the gear ring is fixed inside the furnace.

[0015] In an optional solution: a flat material rack is symmetrically provided at the bottom end of the transmission pipe, and the flat material rack is in close contact with the inner side of the furnace and the outer side of the fixed boss.

[0016] In an optional solution: scraping rods are symmetrically provided on the transmission pipe, and the scraping rods are tightly attached to the bottom end of the filter screen.

[0017] In an optional solution, a plurality of fan blades are provided in a circular array on the transmission tube.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a vortex plate inside the vaporizer box, so that the liquid ammonia is easily vaporized. The vaporized ammonia enters the transmission pipe through the rotating joint. The mounting shaft drives the spiral plate to rotate, thereby transporting the ammonia at one end of the transmission pipe, and then the ammonia is discharged through one end of the rotating pipe. The rotating pipe rotates while revolving. The rotating pipe passes through a plurality of fixed plates at one end, thereby turning the catalyst, thereby preventing one end of the rotating pipe from being blocked. The fixed plate is in close contact with the bottom end of the furnace, thereby facilitating sufficient contact reaction between the ammonia and the catalyst. Since the rotating pipe revolves while discharging the ammonia, the catalyst at the bottom end of the furnace can be contacted and reacted with the ammonia, and the reaction time is long, thereby increasing the practicality of the ammonia cracking hydrogen production contact reaction equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal structure of the cracking furnace and furnace core of the present invention.

[0022] Figure 3 It is a structural schematic diagram of the flat material rack of the present invention.

[0023] Figure 4 Schematic diagram of the spiral plate structure of the present invention.

[0024] Figure 5 It is a schematic diagram of the vortex plate structure of the present invention.

[0025] Figure 6 It is a schematic diagram of the rotary joint structure of the present invention.

[0026] Figure 7 This is a structural schematic diagram of the material baffle rotating plate of the present invention.

[0027] Notes on figure numbers: 11 cracking furnace, 12 furnace core, 13 material baffle plate, 14 first motor, 15 collecting cover, 16 fixed boss, 17 solid feed pipe, 18 liquid ammonia feed pipe, 19 vaporizer, 20 vortex plate, 21 heater, 22 rotating joint, 23 transmission pipe, 24 mounting shaft, 25 spiral plate, 26 second motor, 27 connecting pipe, 28 rotating pipe, 29 gear ring, 30 flat material rack, 31 filter screen, 32 scraper rod, 33 first exhaust pipe, 34 second exhaust pipe, 35 connecting box. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] In one embodiment, Figure 1-Figure 7As shown, a contact reaction device for accelerating ammonia cracking to produce hydrogen comprises a cracking furnace 11, wherein a furnace 12 is fixedly provided inside the cracking furnace 11, wherein the furnace 12 is connected to a solid feed pipe 17, wherein one end of the solid feed pipe 17 extends to the outside of the cracking furnace 11, wherein a fixed boss 16 is fixedly provided at the bottom end of the furnace 12, wherein a plurality of through holes are provided at the bottom end of the furnace 12, wherein a material retaining mechanism for facilitating catalyst replacement is provided at the bottom end of the furnace 12, wherein a connection box 35 is connected to the cracking furnace 11, wherein a vaporization box 19 is fixedly provided at the upper end of the connection box 35, wherein an input end of the vaporization box 19 is connected to a liquid ammonia feed pipe 18, wherein an output end of the vaporization box 19 is connected to a liquid ammonia feed pipe 18. A rotary joint 22 is provided, and the rotary joint 22 is rotatably provided on the transmission pipe 23. A plurality of air inlet holes are provided on the outside of the transmission pipe 23 at positions corresponding to the positions of the rotary joint 22. A conveying mechanism for conveying ammonia is provided inside the transmission pipe 23. A filter screen 31 is provided inside the furnace 12 at a position corresponding to the position below the rotary joint 22. A first exhaust pipe 33 is provided at the upper end of the furnace 12. One end of the first exhaust pipe 33 extends to the outside of the cracking furnace 11. The material blocking mechanism is provided to facilitate the replacement of the catalyst material. The conveying mechanism facilitates the delivery of the vaporized ammonia to the bottom end of the furnace 12, thereby facilitating the contact reaction between the ammonia and the catalyst.

[0031] A heater 21 is provided below the vaporizer box 19. The heater 21 is fixedly provided at the bottom end of the connecting box 35. A vortex plate 20 is fixedly provided inside the vaporizer box 19. The vaporizer box 19 and the vortex plate 20 are combined into a spiral channel. A second exhaust pipe 34 is provided at the upper end of the cracking furnace 11. During use, when liquid ammonia needs to be vaporized, the liquid ammonia is delivered to one end of the spiral channel through the liquid ammonia feed pipe 18 by an external delivery pump. The liquid ammonia then flows along the spiral channel. At the same time, the heater 21 is turned on and ignited to heat the liquid ammonia inside the vaporizer box 19, so that the liquid ammonia is vaporized. At the same time, the gas generated by the combustion of the heater 21 is discharged through the second exhaust pipe 34.

[0032] The material blocking mechanism includes a material blocking rotary plate 13, and the bottom end of the furnace 12 is symmetrically and tightly provided with a material blocking rotary plate 13. The material blocking rotary plate 13 is symmetrically provided with a rotating column, and the rotating column is rotatably provided with a rotating block, and the rotating block is fixedly provided at the bottom end of the furnace 12. A first gear is fixedly provided on the rotating column on the same side, and the two first gears are meshed with each other. One of the rotating columns is fixedly connected to the output end of the first motor 14, and the first motor 14 is fixedly provided inside the cracking furnace 11. During use, when it is necessary to add catalyst to the inside of the furnace 12, the first motor 14 drives a material blocking rotary plate 13 to rotate. Since the two material blocking rotary plates 13 are connected by the first gear transmission, the two material blocking rotary plates 13 are both in close contact with the bottom end of the furnace 12, thereby closing the bottom end of the furnace 12, and then the catalyst is added to the inside of the furnace 12 through the solid feed pipe 17, and the catalyst falls on the upper end of the material blocking rotary plate 13.

[0033] A collecting cover 15 is fixedly provided at the bottom end of the cracking furnace 11, and the output end of the collecting cover 15 extends to the outside of the cracking furnace 11. During use, when the catalyst needs to be replaced, the first motor 14 is started, and the two material-blocking rotating plates 13 rotate simultaneously, and the rotation directions are opposite, so that the bottom end of the furnace 12 is opened, and the catalyst falls into the collecting cover 15, thereby collecting the catalyst.

[0034] The conveying mechanism includes a mounting shaft 24, which is arranged inside the transmission pipe 23, one end of the mounting shaft 24 is rotatably arranged in the mounting groove at the bottom end of the transmission pipe 23, and the other end of the mounting shaft 24 extends to the outside of the cracking furnace 11, the transmission pipe 23 is rotatably arranged in the mounting groove at the upper end of the fixed boss 16, and a spiral plate 25 is provided on the mounting shaft 24 at a position corresponding to the internal position of the transmission pipe 23, the bottom end of the transmission pipe 23 is symmetrically connected with a connecting pipe 27, one end of the connecting pipe 27 is rotatably provided with a rotating pipe 28, and the bottom end of the rotating pipe 28 is provided with a plurality of fixed plates, the bottom end of the fixed plate is tightly attached to the bottom end of the interior of the furnace 12, the rotating pipe 28 is located between the interior of the furnace 12 and the outside of the fixed boss 16, the upper end of the transmission pipe 23 is fixed with a sleeve shaft, one end of the sleeve shaft is fixed with a first bevel gear, and one end of the mounting shaft 24 is fixed with a second bevel gear Wheel, the first bevel gear and the second bevel gear are both engaged with the third bevel gear, and the third bevel gear is fixedly arranged at the output end of the second motor 26, and the second motor 26 is fixedly arranged at the upper end of the cracking furnace 11. When in use, after the liquid ammonia is vaporized, the ammonia enters the transmission pipe 23 through the rotary joint 22. At this time, the second motor 26 is started, so that the transmission pipe 23 and the installation shaft 24 rotate at the same time, and the rotation directions are opposite. The installation shaft 24 drives the spiral plate 25 to rotate, so that the spiral plate 25 transports the ammonia inside the transmission pipe 23, and then the ammonia is discharged through the connecting pipe 27. Since the height of the catalyst at the bottom end of the furnace 12 exceeds one end of the rotating tube 28, the ammonia is discharged through one end of the rotating tube 28 while the rotating tube 28 is revolving, so that the ammonia contacts and reacts with the catalyst to produce a mixed gas of hydrogen and nitrogen, which is discharged through the first exhaust pipe 33.

[0035] A second gear is fixedly provided at one end of the rotating tube 28, and both of the second gears are engaged with a gear ring 29. The gear ring 29 is fixed inside the furnace 12. When in use, when the connecting tube 27 rotates following the transmission tube 23, the connecting tube 27 drives the rotating tube 28 to revolve. At the same time, the rotating tube 28 is engaged with the gear ring 29 through the second gear, so that the rotating tube 28 rotates. When the rotating tube 28 rotates, the catalyst is flipped through the fixed plate at the bottom end of the rotating tube 28, thereby preventing one end of the rotating tube 28 from being blocked.

[0036] A flat material rack 30 is symmetrically provided at the bottom end of the transmission tube 23. The flat material rack 30 is in close contact with the inner side of the furnace 12 and the outer side of the fixed boss 16. When in use, when the transmission tube 23 drives the flat material rack 30 to rotate, the flat material rack 30 can flatten the catalyst after the rotating tube 28 is turned over, thereby facilitating sufficient contact reaction between ammonia and the catalyst.

[0037] Example 2

[0038] The difference from Example 1 is that scrapers 32 are symmetrically provided on the transmission tube 23, and the scrapers 32 are tightly attached to the bottom of the filter 31. When in use, it is convenient to clean impurities attached to the bottom of the filter 31, thereby preventing the filter 31 from being blocked.

[0039] Example 3

[0040] The difference from Example 1 is that a circular array is provided on the transmission tube 23 with a plurality of fan blades. When in use, when the transmission tube 23 rotates, the plurality of fan blades are driven to rotate. The fan blades transport the gas at the bottom end of the furnace 12 upward, thereby accelerating the discharge of hydrogen from the furnace 12.

[0041] The above embodiment discloses a contact reaction device for accelerating ammonia cracking and hydrogen production, wherein, when it is necessary to add catalyst into the furnace 12, the first motor 14 drives a baffle plate 13 to rotate. Since the two baffle plates 13 are connected by the first gear transmission, the two baffle plates 13 are both in close contact with the bottom end of the furnace 12, thereby sealing the bottom end of the furnace 12. Subsequently, the catalyst is added into the furnace 12 through the solid feed pipe 17, and the catalyst falls on the upper end of the baffle plate 13. Liquid ammonia is delivered to one end of the spiral channel through the liquid ammonia feed pipe 18 by an external delivery pump. Then, the liquid ammonia flows along the spiral channel, and at the same time, the heater 21 is turned on and ignited to burn. The temperature is controlled at 500°C, so that the liquid ammonia in the vaporizer 19 is heated and vaporized. At the same time, the gas generated by the combustion of the heater 21 is discharged through the second exhaust pipe 34. After the liquid ammonia is vaporized, the ammonia gas enters the transmission pipe 23 through the rotary joint 22. At this time, the second motor 26 is started, so that the transmission pipe 23 and the installation shaft 24 rotate at the same time, and the rotation directions are opposite. The installation shaft 24 drives the spiral plate 25 to rotate, so that the spiral plate 25 transports the ammonia inside the transmission pipe 23, and then the ammonia is discharged through the connecting pipe 27. At the same time, the rotating pipe 28 is meshed with the gear ring 29 through the second gear, so that the rotating pipe 28 rotates. When the rotating pipe 28 rotates, the catalyst is flipped through the fixed plate at the bottom end of the rotating pipe 28. Since the height of the catalyst at the bottom end of the furnace 12 exceeds one end of the rotating pipe 28, the ammonia is discharged through one end of the rotating pipe 28 while the rotating pipe 28 is revolving, so that the ammonia and the catalyst contact and react to produce a mixed gas of hydrogen and nitrogen. The gas is then filtered by the filter 31 and discharged through the first exhaust pipe 33. At the same time, the transmission pipe 23 drives the flat material rack 30 to rotate, so that the flat material rack 30 can flatten the catalyst after the rotating pipe 28 is flipped.

[0042] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A contact reaction device for accelerating ammonia cracking to produce hydrogen, comprising a cracking furnace (11), wherein a furnace core (12) is fixedly provided inside the cracking furnace (11), a solid feed pipe (17) is provided in communication with the interior of the furnace core (12), one end of the solid feed pipe (17) extends to the outside of the cracking furnace (11), a fixed boss (16) is fixedly provided at the bottom end of the furnace core (12), and a plurality of through holes are provided at the bottom end of the furnace core (12), wherein the device is characterized in that: The bottom end of the furnace (12) is provided with a material blocking mechanism for facilitating the replacement of the catalyst. The cracking furnace (11) is connected to a connection box (35). A vaporizer box (19) is fixedly provided at the upper end of the connection box (35). The input end of the vaporizer box (19) is connected to a liquid ammonia feed pipe (18). The output end of the vaporizer box (19) is connected to a rotary joint (22). The rotary joint (22) is rotatably arranged on a transmission pipe (23). A plurality of air inlet holes are provided on the outside of the transmission pipe (23) at positions corresponding to the position of the rotary joint (22). A conveying mechanism for conveying ammonia is provided inside the transmission pipe (23). A filter screen (31) is provided inside the furnace (12) at a position corresponding to the position below the rotary joint (22). The upper end of the furnace (12) is connected to a first exhaust pipe (33). One end of the first exhaust pipe (33) extends to the outside of the cracking furnace (11).

2. The contact reaction device for accelerating ammonia cracking to produce hydrogen according to claim 1, characterized in that: A heater (21) is provided below the vaporizer (19), and the heater (21) is fixedly provided at the bottom end of the connection box (35). A vortex plate (20) is fixedly provided inside the vaporizer (19), and the vaporizer (19) and the vortex plate (20) are combined to form a spiral channel. A second exhaust pipe (34) is provided at the upper end of the cracking furnace (11).

3. The contact reaction device for accelerating ammonia cracking to produce hydrogen according to claim 1, characterized in that: The material blocking mechanism includes a material blocking rotating plate (13), the bottom end of the furnace (12) is symmetrically and tightly provided with a material blocking rotating plate (13), the material blocking rotating plate (13) is symmetrically provided with a rotating column, the rotating column is rotatably provided with a rotating block, the rotating block is fixedly provided at the bottom end of the furnace (12), the rotating column on the same side is fixedly provided with a first gear, the two first gears are meshed with each other, one of the rotating columns is fixedly connected to the output end of a first motor (14), and the first motor (14) is fixedly provided inside the cracking furnace (11).

4. The contact reaction device for accelerating ammonia cracking to produce hydrogen according to claim 3, characterized in that: A material collecting cover (15) is fixedly provided at the bottom end of the cracking furnace (11), and an output end of the material collecting cover (15) extends to the outside of the cracking furnace (11).

5. The contact reaction device for accelerating ammonia cracking to produce hydrogen according to claim 1, characterized in that: The conveying mechanism includes a mounting shaft (24), the mounting shaft (24) is arranged inside the transmission pipe (23), one end of the mounting shaft (24) is rotatably arranged in the mounting groove at the bottom end of the transmission pipe (23), the other end of the mounting shaft (24) extends to the outside of the cracking furnace (11), the transmission pipe (23) is rotatably arranged in the mounting groove at the upper end of the fixed boss (16), a spiral plate (25) is provided on the mounting shaft (24) at a position corresponding to the internal position of the transmission pipe (23), the bottom end of the transmission pipe (23) is symmetrically connected with a connecting pipe (27), and one end of each connecting pipe (27) is rotatably provided with a rotating pipe (28) The bottom end of the rotating tube (28) is provided with a plurality of fixed plates, the bottom end of the fixed plate is in close contact with the bottom end of the furnace (12), the rotating tube (28) is located between the inside of the furnace (12) and the outside of the fixed boss (16), the upper end of the transmission tube (23) is fixed with a sleeve shaft, one end of the sleeve shaft is fixed with a first bevel gear, one end of the mounting shaft (24) is fixed with a second bevel gear, the first bevel gear and the second bevel gear are both engaged with a third bevel gear, the third bevel gear is fixedly provided at the output end of the second motor (26), and the second motor (26) is fixedly provided at the upper end of the cracking furnace (11).

6. The contact reaction device for accelerating ammonia cracking to produce hydrogen according to claim 5, characterized in that: A second gear is fixedly provided at one end of each rotating tube (28), and both second gears are meshed with a gear ring (29), which is fixed inside the furnace (12).

7. The contact reaction device for accelerating ammonia cracking to produce hydrogen according to claim 6, characterized in that: A flat material rack (30) is symmetrically provided at the bottom end of the transmission pipe (23), and the flat material rack (30) is in close contact with the inner side of the furnace (12) and the outer side of the fixed boss (16).

8. The contact reaction device for accelerating ammonia cracking to produce hydrogen according to claim 1, characterized in that: Scraping rods (32) are symmetrically provided on the transmission pipe (23), and the scraping rods (32) are closely attached to the bottom end of the filter screen (31).

9. The contact reaction device for accelerating ammonia cracking to produce hydrogen according to claim 1, characterized in that: A plurality of fan blades are provided in a circular array on the transmission pipe (23).

10. A method for using the contact reaction device for accelerating ammonia cracking to produce hydrogen according to any one of claims 1 to 9, characterized in that: The following steps are included: Step 1: Two baffle plates (13) seal the bottom of the furnace (12), a catalyst is added into the furnace (12) through a solid feed pipe (17), and liquid ammonia is delivered to one end of the spiral channel through a liquid ammonia feed pipe (18) by an external delivery pump. At the same time, a heater (21) is turned on to heat and vaporize the liquid ammonia inside the vaporization box (19); Step 2: After the liquid ammonia is vaporized, the ammonia gas enters the transmission pipe (23) through the rotating joint (22), and the transmission pipe (23) and the mounting shaft (24) rotate simultaneously. The mounting shaft (24) drives the spiral plate (25) to rotate, so that the spiral plate (25) transports the ammonia gas inside the transmission pipe (23). Then, the ammonia gas is discharged through the connecting pipe (27). At the same time, the rotating pipe (28) is engaged with the gear ring (29) through the second gear, so that the rotating pipe (28) rotates. When the rotating pipe (28) rotates, the catalyst is flipped through the fixed plate at the bottom end of the rotating pipe (28); Step 3: While the rotating tube (28) is revolving, ammonia is discharged through one end of the rotating tube (28), so that the ammonia reacts with the catalyst to produce a mixed gas of hydrogen and nitrogen. The gas is then filtered through the filter (31) and discharged through the first exhaust pipe (33). At the same time, the transmission tube (23) drives the flat material rack (30) to rotate, so that the flat material rack (30) can flatten the catalyst after the rotating tube (28) is turned over.

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