Cylindrical ammonia gas cracking device

Abstract

The utility model relates to the technical field of new energy conversion, in particular to a cylindrical ammonia cracking device which comprises a shell, a first partition plate, a second partition plate, a plurality of heat exchange tubes and an ammonia cracking catalyst. A working space is formed in the shell. The first partition plate is located in the working space and supported on the shell so as to divide the working space into a heating chamber and an ammonia gas chamber. The second partition plate is located in the ammonia gas chamber and supported on the shell so as to divide the ammonia gas chamber into a gas inlet chamber and a gas outlet chamber. The ammonia cracking device has the beneficial effects that the ammonia cracking catalyst is arranged in the heat exchange tube, so that not only can the ammonia gas and the ammonia cracking catalyst have enough contact area, but also the flow rate of the ammonia gas can be reduced, further the ammonia gas can be in full contact with the ammonia cracking catalyst, and the ammonia cracking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy conversion, in particular to a cylindrical ammonia cracking device. Background Art

[0002] Research is underway both domestically and internationally on alternative fuels with higher combustion efficiency and cleaner fuels, such as ammonia, hydrogen, liquefied natural gas, and biomass fuels. Hydrogen, while a renewable and clean fuel, holds great potential, but its low energy density and ignition energy pose significant challenges to safe transportation and storage. Ammonia, a derivative of hydrogen, is a promising renewable energy source. Its complete combustion products are only gas and water, and its production and transportation processes are already well-established.

[0003] Ammonia is a colorless, pungent, and highly corrosive gas at normal pressure and temperature. It also has poor combustion characteristics, is difficult to ignite at a high ignition temperature, and has a low laminar combustion velocity and calorific value. The energy required for ignition is high, and the explosion limit is narrow (16% to 25%). Currently, two approaches have been proposed to improve the combustion performance of ammonia fuel: mixing ammonia with a fuel that accelerates its combustion reaction, such as ammonia-hydrogen, ammonia-diesel, ammonia-gasoline, ammonia-liquefied natural gas, or ammonia-methane. This approach is relatively simple and has been widely researched and utilized. The second approach involves partially cracking ammonia into hydrogen and nitrogen. The resulting mixture contains a high concentration of hydrogen, which accelerates combustion and improves ammonia's combustion properties. The third approach primarily involves catalytic cracking of ammonia in a high-temperature environment. Depending on the catalyst, hydrogen can be cracked at temperatures of 400 to 800°C, and the escape of ammonia and the resulting mixture must be prevented. Therefore, achieving efficient and safe ammonia cracking is an urgent challenge. Utility Model Content

[0004] (1) Technical issues to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a serpentine tubular cylindrical ammonia cracking device to achieve efficient and safe cracking of ammonia.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by this utility model include:

[0008] In a first aspect, the present invention provides a cylindrical ammonia cracking device comprising a housing, a first partition, a second partition, a plurality of heat exchange tubes, and an ammonia cracking catalyst. A working space is formed within the housing. The first partition is located within the working space and supported by the housing to separate the working space into a heating chamber and an ammonia chamber. A heating medium inlet and a heating medium outlet are provided on the side wall of the housing corresponding to the heating chamber. A second partition is located within the ammonia chamber and supported by the housing to separate the ammonia chamber into an air inlet chamber and an air outlet chamber. An ammonia inlet and a mixed gas outlet are provided on the side walls of the housing corresponding to the air inlet chamber and the air outlet chamber, respectively. A plurality of heat exchange tubes are located within the heating chamber and supported by the first partition. Both ends of the plurality of heat exchange tubes are connected to the air inlet chamber and the air outlet chamber. An ammonia cracking catalyst is provided within the heat exchange tubes.

[0009] (3) Beneficial effects

[0010] The beneficial effects of the utility model are as follows: the outer shell of the cylindrical ammonia cracking device of the utility model provides a closed working space for accommodating various internal components and ensuring that the cracking process is carried out in a controlled environment.

[0011] The first partition divides the workspace into two areas: a heating chamber and an ammonia chamber. The heating chamber provides a high-temperature environment to activate the ammonia cracking reaction, while the ammonia chamber is where the ammonia gas flows. This creates a neater and more organized workspace, which helps improve ammonia cracking efficiency.

[0012] The second partition further divides the ammonia chamber into an inlet chamber and an outlet chamber. The inlet chamber receives ammonia from the outside and feeds it into the heat exchange tubes, while the outlet chamber collects ammonia output from the heat exchange tubes. This ensures that the ammonia is consistently heated by the heating chamber, thereby improving the stability and efficiency of the ammonia cracking process.

[0013] The ammonia cracking catalyst can be arranged in the gas outlet chamber or inside the heat exchange tube to increase the contact area between the ammonia gas and the ammonia cracking catalyst and promote the occurrence of the cracking reaction.

[0014] By arranging an ammonia cracking catalyst in the heat exchange tube, not only can the ammonia and the ammonia cracking catalyst have sufficient contact area, but the ammonia flow rate can also be reduced, thereby allowing the ammonia to fully contact the ammonia cracking catalyst and improving the ammonia cracking efficiency.

[0015] Ammonia is cracked in the heat exchange tubes, which are arranged in the heating chamber, thus achieving double protection of the ammonia cracking process and effectively preventing ammonia from leaking into the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of the cylindrical ammonia cracking device of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the cylindrical ammonia cracking device of the utility model from the left side;

[0018] Figure 3 This is one of the structural diagrams of the first partition of the utility model;

[0019] Figure 4 This is a schematic structural diagram of the first baffle and heat exchange tube of the utility model;

[0020] Figure 5 This is a schematic structural diagram of the first baffle and baffle assembly of the utility model;

[0021] Figure 6 This is one of the structural diagrams of the first medium pipeline of the utility model;

[0022] Figure 7 This is the second structural diagram of the second medium pipeline of the utility model;

[0023] Figure 8 This is the third structural diagram of the second medium pipeline of the utility model;

[0024] Figure 9 It is a structural schematic diagram of the anti-collision plate, the first medium pipeline, the third partition plate and the heat exchange tube of the utility model.

[0025] [Description of Reference Numerals]

[0026] 1. Outer shell; 11. First shell; 12. Second shell; 2. First partition; 21. Heating chamber; 211. Main heating chamber; 212. Preheating heating chamber; 22. Ammonia chamber; 23. Heating medium inlet; 24. Heating medium outlet; 25. Connecting hole; 3. Second partition; 221. Air inlet chamber; 222. Air outlet chamber; 31. Ammonia inlet; 32. Mixed gas outlet; 4. Ammonia cracking catalyst; 5. Third partition; 6. Baffle assembly; 61. Baffle; 62. Pull rod; 63. Spacer tube; 64. First serpentine channel; 65. Second serpentine channel; 7. First medium pipeline; 8. Second medium pipeline; 9. Anti-collision plate; 10. Heat exchange tube. DETAILED DESCRIPTION

[0027] In order to better explain the present invention, and to facilitate understanding, the following Figure 1-9 , through the specific implementation method, the utility model is described in detail. Among them, the directional nouns such as "upper" and "lower" mentioned in this article are Figure 1 The orientation is referenced.

[0028] Example 1:

[0029] Reference Figures 1-9An embodiment of the present invention provides a cylindrical ammonia cracking device, comprising a housing 1, a first partition 2, a second partition 3, a plurality of heat exchange tubes 10, and an ammonia cracking catalyst 4. A working space is formed within the housing 1. The first partition 2 is positioned within the working space and supported by the housing 1, dividing the working space into a heating chamber 21 and an ammonia chamber 22. A heating medium inlet 23 and a heating medium outlet 24 are provided on the sidewall of the housing 1 corresponding to the heating chamber 21. The second partition 3 is positioned within the ammonia chamber 22 and supported by the housing 1, dividing the ammonia chamber 22 into an inlet chamber 221 and an outlet chamber 222. An ammonia inlet 31 and a mixed gas outlet 32 ​​are provided on the sidewalls of the housing 1 corresponding to the inlet chamber 221 and the outlet chamber 222, respectively. Multiple heat exchange tubes 10 are supported on the first partition 2 and positioned within the heating chamber 21. Both ends of the multiple heat exchange tubes 10 communicate with the inlet chamber 221 and the outlet chamber 222. An ammonia cracking catalyst 4 is disposed within the heat exchange tubes 10.

[0030] In this embodiment, the housing 1 is the main structure of the entire device, which provides a closed working space for accommodating various internal components and ensuring that the lysis process is carried out in a controlled environment.

[0031] First baffle 2, installed inside housing 1, divides the workspace into two areas: a heating chamber 21 and an ammonia chamber 22. Heating chamber 21 provides a high-temperature environment to activate the ammonia cracking reaction, while ammonia chamber 22 allows ammonia gas to flow, creating a neater and more organized workspace and improving ammonia cracking efficiency.

[0032] The heating medium inlet 23 and the heating medium outlet 23 are used to introduce and discharge the heating medium, respectively. The heating medium circulates in the heating chamber 21 and transfers heat to the heat exchange tubes 10 in the heating chamber 21, thereby heating the ammonia gas entering the heat exchange tubes 10.

[0033] The second partition plate 3 further divides the ammonia chamber 22 into an inlet chamber 221 and an outlet chamber 222. The inlet chamber 221 receives ammonia from the outside and feeds it into the heat exchange tube 10, while the outlet chamber 222 collects ammonia output from the heat exchange tube 10. This ensures that the ammonia is heated by the heating chamber 21, thereby improving the stability and efficiency of the ammonia cracking process.

[0034] The two ends of the heat exchange tube 10 are respectively connected to the air inlet chamber 221 and the air outlet chamber 222, forming a channel for the ammonia gas to flow. In the heating chamber 21, the heat exchange tube 10 is heated by the heating medium, so that the ammonia gas flowing therethrough reaches the temperature required for cracking.

[0035] The ammonia cracking catalyst 4 may be disposed inside the heat exchange tube 10 to increase the contact area between the ammonia gas and the ammonia cracking catalyst and promote the occurrence of the cracking reaction.

[0036] Specifically, the ammonia cracking catalyst 4 can be provided in a granular form. When it is provided in the heat exchange tube 10, mesh sheets should be provided at least at both ends of the heat exchange tube 10 to prevent the ammonia cracking catalyst 4 from falling.

[0037] By arranging the ammonia cracking catalyst 4 in the heat exchange tube 10, not only can ammonia and the ammonia cracking catalyst 4 have a sufficient contact area, but also the ammonia flow rate can be reduced, thereby allowing ammonia to fully contact the ammonia cracking catalyst 4 and improving the ammonia cracking efficiency.

[0038] Ammonia is cracked in the heat exchange tube 10, and the heat exchange tube 10 is arranged in the heating chamber 21, thereby achieving double protection of the ammonia cracking process and effectively preventing ammonia from leaking into the environment.

[0039] Example 2:

[0040] Reference Figure 1 In addition to all the technical solutions of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0041] The ammonia cracking catalyst 4 is also provided in the gas outlet chamber 222 , so that the ammonia that is not completely cracked in the heat exchange tube 10 can be further cracked in the gas outlet chamber 222 under the action of the ammonia cracking catalyst 4 , thereby improving the ammonia cracking hydrogen production efficiency of the device.

[0042] When the ammonia cracking catalyst 4 is disposed in the gas outlet chamber 222 , a mesh is also provided at the mixed gas outlet 32 ​​on the gas outlet chamber 222 to prevent the ammonia cracking catalyst 4 from falling.

[0043] Example 3:

[0044] In addition to all the technical solutions of the above embodiments, the embodiments of the present invention further include the following technical solutions:

[0045] The heating medium inlet 23 is adapted to be connected to the output end of the ammonia plasma ignition burner to receive ammonia combustion flue gas.

[0046] In this embodiment, the heating medium input to the heating chamber 21 is designated as combustion flue gas of ammonia, and the combustion flue gas of ammonia can be provided by an ammonia plasma ignition burner.

[0047] Since the ammonia plasma ignition burner and the cylindrical ammonia cracking device can share the ammonia supply device, the consistency of the device is improved and the cost is reduced.

[0048] Specifically, the ammonia plasma ignition burner includes an ammonia plasma igniter, an injection box, an ammonia supply device and a diverter device, and the front side of the injection box forms a combustion zone; the ammonia plasma igniter includes a first flame guide tube, the front end of the first flame guide tube passes through the injection box and extends to the rear side of the injection box to form a first preheating zone in the inner cavity of the injection box, and the front end of the first flame guide tube forms an opening structure connected to the combustion zone to form an ignition zone; the inner cavity of the first flame guide tube forms a first combustion chamber of the ammonia plasma igniter; the outlet end of the ammonia supply device is connected to the inner cavity of the injection box; the diverter device includes an injection module and a heat recovery channel, the injection module is connected to the front side of the injection box and is connected to the inner cavity of the injection box, the ignition zone can preheat the injection module and ignite the ammonia output by the injection module to the combustion zone; the heat recovery channel connects the inner cavity of the injection box and the first combustion chamber, so that the ammonia in the inner cavity of the injection box flows back to the first combustion chamber and is ignited.

[0049] The ammonia plasma ignition burner also includes an ammonia cracking catalyst 4 disposed in the injection box; the ammonia cracking catalyst 4 includes a combination of one or more nickel-based, ruthenium-based and iron-based ammonia cracking catalysts 4 to promote the cracking of ammonia at high temperature, generate some hydrogen to promote ammonia combustion, and thus help improve the ammonia combustion efficiency.

[0050] The ammonia plasma ignition burner of the present invention utilizes only one fuel, namely ammonia, and thus is beneficial to improving the integrity and consistency of the burner, thereby improving the integrity and consistency of the cylindrical ammonia cracking device.

[0051] In this embodiment, a first combustion chamber is formed within the first flame guide. This chamber is where the initial combustion of the ammonia occurs. The front end of the first flame guide is designed as an opening that extends through the injection box. This allows the high-temperature flame and heat generated by plasma ignition to radiate directly to the first preheating zone, facilitating heating of the ammonia within the injection box. Furthermore, the flow of the burning gas mixture creates an ignition zone at the front of the injection box to ignite the high-temperature ammonia output by the injection module. Simultaneously, the burning gas mixture output from the first combustion chamber preheats the injection module, thereby increasing the temperature of the ammonia output from the injection module and ensuring ignition of the ammonia.

[0052] The injection module and the heat recovery channel divide the ammonia into two output directions. Most of the ammonia is output through the injection module and can be ignited by the first flame duct, and a small part is output to the inside of the first flame duct through the heat recovery channel. Before the ammonia plasma igniter stops working, this small part of ammonia can be ignited, and after ignition, it can remain in the first combustion chamber for a period of time. In this way, even if the ammonia plasma igniter stops working, the ammonia output by the heat recovery channel can still be ignited.

[0053] In this way, the ammonia plasma igniter plays an ignition role in the initial stage of combustion. When the ammonia in the injection box can reach the temperature of autonomous combustion, it still maintains self-sustaining combustion after the ammonia plasma ignition burner is turned off, ensuring the reliability of the use of the ammonia plasma ignition burner. The ammonia plasma igniter does not need to keep working all the time, thereby reducing the energy consumption of the ammonia plasma ignition burner.

[0054] In addition, the utility model patent uses an ammonia plasma igniter to form a high-temperature and highly active hydrogen-containing mixture, which can realize the combustion operation of ammonia in the ignition stage without the need to separately configure high-pressure air or use a blower air intake method, further reducing energy consumption and costs and improving ignition reliability.

[0055] The specific injection box is configured as a rotating box body, a through hole for penetrating the first flame guide tube is reserved in the middle thereof, and the two are configured in a coaxial form to ensure structural stability.

[0056] Through holes are distributed on the first flame guide tube.

[0057] Example 4:

[0058] Reference Figure 1 、 Figure 3 、 Figure 5 and Figure 9 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0059] The cylindrical ammonia cracking device also includes a third partition 5, which is located in the heating chamber 21 and supported on the outer shell 1 to separate the heating chamber 21 into a main heating chamber 211 and a preheating heating chamber 212; the main heating chamber 211 and the preheating heating chamber 212 are connected on the side away from the first partition 2; the heating medium inlet 23 is suitable for outputting the heating medium to the side of the main heating chamber 211 close to the first partition 2; the heating medium inlet 23 is suitable for outputting the heating medium to the side of the main heating chamber 211 close to the first partition 2, the preheating heating chamber 212 corresponds to the air inlet chamber 221, and the main heating chamber 211 corresponds to the air outlet chamber 222, so as to form a preheating zone for the preheating heat exchange tube 10 in the preheating heating chamber 212, and a centralized heating zone for the centralized heating heat exchange tube 10 in the main heating chamber 211.

[0060] In this embodiment, since the heating medium inlet 23 outputs the heating medium to the side of the main heating chamber 211 close to the first partition 2, and the main heating chamber 211 and the preheating chamber 212 are connected on the side away from the first partition 2, the temperature of the concentrated heating zone will be higher than the temperature of the preheating zone, and the temperature in the heating chamber 21 will decrease along the flow direction of the heating medium.

[0061] In this way, the heating medium will preheat the heat exchange tube 10 at a relatively low temperature, thereby reducing the temperature difference stress during subsequent concentrated heating, increasing the service life of the heat exchange tube 10, and preliminarily raising the temperature of the gas to prepare for the subsequent cracking reaction. This gradual heating form can also improve the heating effect of ammonia, thereby improving the cracking effect of ammonia.

[0062] After preheating, the ammonia gas continues to pass through the heat exchange tubes 10 and enters the main heating chamber 211. The heating medium has a higher temperature, forming a concentrated heating zone. In this zone, the high-temperature heating medium efficiently heats the heat exchange tubes 10, rapidly bringing the gas temperature to the required cracking temperature range, thereby enabling efficient cracking of the ammonia gas.

[0063] Through the zoning design of the preheating zone and the centralized heating zone, the heat of the heating medium is utilized in a step-by-step manner, thereby improving the heating efficiency of the ammonia in the heat exchange tube 10 and further improving the cracking efficiency of the ammonia in the heat exchange tube 10 .

[0064] Example 5:

[0065] Reference Figure 1 and Figure 5 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0066] The cylindrical ammonia cracking device also includes a deflection assembly 6, which is suitable for forming a first serpentine channel 64 and a second serpentine channel 65 in the main heating chamber 211 and the preheating heating chamber 212. The first serpentine channel 64 and the second serpentine channel 65 are kept in communication on the side away from the first partition 2; the heating medium inlet 23 is suitable for outputting the heating medium to the side of the first serpentine channel 64 close to the first partition 2, and the heating medium outlet 24 is suitable for communicating with the side of the second serpentine channel 65 close to the first partition 2, so that the temperature in the first serpentine channel 64 and the second serpentine channel 65 decreases along the flow direction of the heating medium.

[0067] In this embodiment, the deflector assembly 6 forms a first serpentine channel 64 and a second serpentine channel 65 in the main heating chamber 211 and the preheating heating chamber 212, which extends the flow length of the heating medium, thereby facilitating the heating medium to more fully contact with the heat exchange tube 10 for heat exchange, thereby achieving effective utilization of the heating medium temperature and efficient heating of the heat exchange tube 10.

[0068] The first serpentine channel 64 is located within the main heating chamber 211, near the first baffle 2. The heating medium inlet 23 outputs the heating medium to the side of this channel near the first baffle 2, so that the high-temperature heating medium enters this channel first and efficiently exchanges heat with the heat exchange tubes 10.

[0069] The second serpentine passage 65 is located in the preheating chamber 212 and is connected to the first serpentine passage 64 on the side away from the first partition 2. As the heating medium releases heat and cools in the first serpentine passage 64, it enters the second serpentine passage 65 and continues to provide the heat required for preheating the heat exchange tubes 10 in the preheating chamber 212.

[0070] As the heating medium continuously releases heat to the heat exchange tubes 10 during its flow, its temperature gradually decreases along the flow direction. Within the first serpentine passage 64, the heating medium maintains a relatively high temperature, rapidly heating the gas within the heat exchange tubes 10 to the high temperature required for cracking. Subsequently, within the second serpentine passage 65, although the heating medium's temperature has decreased somewhat, it remains sufficient to preheat the heat exchange tubes 10 entering the preheating zone.

[0071] Example 6:

[0072] Reference Figure 1 and Figure 5 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0073] The deflection assembly 6 includes a plurality of deflection plates 61 located in the main heating chamber 211 and the preheating chamber 212. The deflection plates 61 and the corresponding side walls of the main heating chamber 211 and the preheating chamber 212 form a first serpentine channel 64 and a second serpentine channel 65; the deflection assembly 6 also includes a pull rod 62 and a distance tube 63. Two pull rods 62 are provided and are both supported on the first partition 2. The pull rods 62 extend correspondingly to the main heating chamber 211 and the preheating chamber 212; a plurality of distance tubes 63 are provided and are all axially sleeved on the corresponding pull rods 62; a limiting area of ​​the deflection plate 61 is formed between coaxial adjacent distance tubes 63 to limit the spacing between adjacent deflection plates 61.

[0074] In this embodiment, the baffle 61 can change the flow direction of the heating medium so that it can flow along the serpentine channel, thereby increasing the residence time of the heating medium in the heating chamber 21 and improving the heat exchange efficiency.

[0075] The tie rods 62 serve as the support structure for the entire baffle assembly 6 and as the mounting base for the distance tubes 63, ensuring the overall stability and reliability of the baffle assembly 6. The limiting area limits the distance between adjacent baffles 61, ensuring that the baffles 61 can be arranged in the predetermined position, thereby maintaining the precise shape and size of the serpentine channel.

[0076] Within the main heating chamber 211, the baffles 61, the sidewalls of the heating chamber 21, and the third plate collectively form a first serpentine channel 64. After the heating medium enters this channel through the heating medium inlet 23, it flows along the zigzag path formed by the baffles 61, efficiently exchanging heat with the heat exchange tubes 10.

[0077] Within the preheating chamber 212, the baffle 61, the sidewalls of the heating chamber 21, and the third plate together form a second serpentine channel 65. As the heating medium releases heat and cools in the first serpentine channel 64, it enters the second serpentine channel 65 and continues to provide the heat required for preheating the heat exchange tubes 10 within the preheating chamber 212.

[0078] The tie rods 62 and distance tubes 63 provide stable support for the baffles 61, ensuring secure installation and long-term operation of the baffle assembly 6 within the heating chamber 21. The design of the distance tubes 63 and baffles 61 facilitates assembly disassembly and installation, facilitating equipment maintenance and overhaul. By adjusting the number and position of the baffles 61, tie rods 62, and distance tubes 63, the shape and size of the serpentine passage can be flexibly adjusted to accommodate cylindrical ammonia cracking units of varying sizes and requirements.

[0079] Example 7:

[0080] Reference Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0081] The cylindrical ammonia cracking device also includes a first medium pipe 7, one end of which extends into the heating chamber 21 and is detachably connected to the first partition 2. A first opening is provided on the side of the first medium pipe 7 close to the first partition 2, and the first opening faces the main heating chamber 211; the first opening faces the side of the first serpentine channel 64 close to the first partition 2; mounting grooves capable of supporting the third partition 5 are provided on both sides of the first medium pipe 7; the axial cross-section of the first medium pipe 7 is rectangular.

[0082] In this embodiment, one end of the first medium pipe 7 extends into the heating chamber 21 and is designed to be detachably connected to the first partition plate 2. This connection method facilitates the maintenance and replacement of the first medium pipe 7, and also provides a stable channel for the input of the heating medium, thereby improving the stability of the device.

[0083] Specifically, an end plate may be welded to the end of the first medium pipeline 7 , and the end plate may be connected to the first partition plate 2 by bolts.

[0084] The position design of the first opening can ensure that the heating medium can directly and efficiently enter the main heating chamber 211 and exchange heat with the heat exchange tube 10. At the same time, it can also output the heating medium to the head end of the first serpentine channel 64, ensuring that the heating medium fully flows through the first serpentine channel 64, thereby improving the heat utilization rate of the heating medium and thereby improving the cracking efficiency of the device for ammonia.

[0085] Mounting grooves are provided on both sides of the first medium pipe 7 for supporting the third partition 5, which not only enhances the stability of the third partition 5, but also simplifies the complexity of the internal structure of the heating chamber 21, making the entire device more compact and efficient.

[0086] The axial cross-section of the first medium pipeline 7 is rectangular, which helps to increase the rigidity and stability of the pipeline, and is also conducive to coordination and installation with other components in the heating chamber 21. For example, it is easier to open a mounting groove on the side wall, and it is also easier to cooperate with the third partition plate 5 to divide the heating chamber 21 into a main heating chamber 211 and a preheating heating chamber 212, thereby improving the regularity of the heating chamber 21, thereby facilitating the flow of the heating medium and improving the cracking efficiency of the device for ammonia.

[0087] The cylindrical ammonia cracking device further includes a second medium pipeline 8 , one end of which passes through the outer shell 1 and extends to the heating chamber 21 , and is detachably sealedly connected to the end of the first medium pipeline 7 away from the first partition 2 .

[0088] In this embodiment, the second medium pipe 8 is removably and sealedly connected to the first medium pipe 7 at the end away from the first partition 2. This connection not only ensures leak-free transmission of the heating medium between the pipes but also facilitates pipe maintenance and replacement. The removable connection makes maintenance and replacement of the second medium pipe 8 and the first medium pipe 7 simple and quick. When cleaning the pipes, replacing the medium, or performing other maintenance work is necessary, the pipes can be easily removed and reinstalled without disassembling the entire heating chamber 21, thereby improving the overall maintainability of the device.

[0089] Since the heating medium needs to maintain a certain temperature and pressure during the transmission process, the connection between the second medium pipeline 8 and the first medium pipeline 7 must have good sealing performance, and a sealing ring can be used to establish a seal. This can prevent the heating medium from leaking into the environment, causing safety hazards or environmental pollution.

[0090] Example 8:

[0091] Reference Figures 1-9 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0092] The shell 1 is a cylindrical structure, and the shell 1 includes a first shell 11 and a second shell 12 that are detachably connected to each other, and the first partition 2 is clamped between the first shell 11 and the second shell 12; the first partition 2 and the deflector 61 extend in the perpendicular direction of the axis of the shell 1; the second partition 3, the third partition 5, the first medium pipeline 7, the second medium pipeline 8 and the pull rod 62 all extend in the axial direction of the shell 1; the heat exchange tube 10 is a U-shaped tube.

[0093] The shell 1 is a cylindrical structure, and the shell 1 includes a first shell 11 and a second shell 12 that are detachably connected to each other, and the first partition 2 is clamped between the first shell 11 and the second shell 12; the first partition 2 and the third partition 5 extend along the perpendicular direction of the axis of the shell 1; the second partition 3, the first medium pipeline 7, the second medium pipeline 8 and the pull rod 62 all extend along the axial direction of the shell 1, so that the layout of each component in the working space is maintained in a regular state, which facilitates the maintenance of each component and improves the disassembly and assembly efficiency of each component.

[0094] Furthermore, since the layout of the components in the working space is more regular, it is beneficial to improve the overall structural compactness of the device.

[0095] Example 9:

[0096] Reference Figure 1 and Figure 9 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0097] The cylindrical ammonia cracking device also includes a baffle plate 9 supported in the main heating chamber 211. The baffle plate 9 is located on the outside of the corresponding heat exchange tube 10 closer to the first opening, so that the medium output from the first opening is dispersed by the baffle plate 9, thereby preventing the high-speed heating medium from directly impacting the heat exchange tube 10, thereby protecting the heat exchange tube 10 from damage and extending its service life; at the same time, it can also disperse the heating medium, so that the heating medium can flow more evenly in the main heating chamber 211, thereby improving the heating efficiency of the heat exchange tube 10.

[0098] Example 10:

[0099] Reference Figure 1 、 Figure 3 and Figure 5 In addition to all the technical solutions of any of the above embodiments, the embodiments of the present invention further have the following technical solutions:

[0100] The first partition plate 2 is provided with a pair of connection holes 25 . The two pairs of connection holes 25 are located in the main heating chamber 211 and the preheating heating chamber 212 , respectively. The end of each heat exchange tube 10 is supported in the corresponding connection hole 25 .

[0101] In this embodiment, the end of each heat exchange tube 10 is supported in the corresponding connection hole 25. This support method not only ensures the stability of the heat exchange tube 10, but also ensures that the medium can flow smoothly through the heat exchange tube 10 for heat exchange.

[0102] At the same time, the connection position of the heat exchange tube 10 is limited by the connection hole 25, thereby improving the assembly efficiency of the heat exchange tube 10 on the first partition 2. The connection holes 25 are evenly distributed on the first partition 2, which can evenly reserve a flow path for the heating medium between adjacent heat exchange tubes 10, thereby improving the heating uniformity of different heat exchange tubes 10.

[0103] It can be understood that, except for any conflicting parts, the above embodiments 1-10 can be freely combined to form other implementation methods of the present invention.

[0104] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0105] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0106] In the present invention, unless otherwise expressly specified or limited, when a first feature is “above” or “below” a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above,” “above,” or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is “below,” “below,” or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0107] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, article, or apparatus / device.

[0108] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A cylindrical ammonia cracking device, characterized by: include: A housing (1), wherein a working space is formed in the housing (1); a first partition (2) located in the working space and supported on the housing (1) to separate the working space into a heating chamber (21) and an ammonia chamber (22); a heating medium inlet (23) and a heating medium outlet (24) are provided on a side wall of the housing (1) corresponding to the heating chamber (21); a second partition (3) located in the ammonia chamber (22) and supported on the housing (1) to separate the ammonia chamber (22) into an inlet chamber (221) and an outlet chamber (222); an ammonia inlet (31) and a mixed gas outlet (32) are respectively provided on the side walls of the housing (1) corresponding to the inlet chamber (221) and the outlet chamber (222); A plurality of heat exchange tubes (10) are located in the heating chamber (21) and supported on the first partition plate (2), and two ends of the plurality of heat exchange tubes (10) are respectively connected to the air inlet chamber (221) and the air outlet chamber (222); An ammonia cracking catalyst (4) is arranged in the heat exchange tube (10).

2. The cylindrical ammonia cracking device according to claim 1, characterized in that: The ammonia cracking catalyst (4) is also arranged in the gas outlet chamber (222).

3. The cylindrical ammonia cracking device according to claim 1 or 2, characterized in that: The heating medium inlet (23) is suitable for being connected to the output end of the ammonia plasma ignition burner to receive ammonia combustion flue gas.

4. The cylindrical ammonia cracking device according to claim 3, characterized in that: The heating chamber (21) further comprises a third partition (5), the third partition (5) being located in the heating chamber (21) and supported on the housing (1) to separate the heating chamber (21) into a main heating chamber (211) and a preheating heating chamber (212); the main heating chamber (211) and the preheating heating chamber (212) being connected on a side away from the first partition (2); and the heating medium inlet (23) being adapted to output the heating medium to a side of the main heating chamber (211) close to the first partition (2); The heating medium inlet (23) is suitable for outputting the heating medium to the side of the main heating chamber (211) close to the first partition (2), the preheating chamber (212) corresponds to the air inlet chamber (221), and the main heating chamber (211) corresponds to the air outlet chamber (222), so as to form a preheating zone for preheating the heat exchange tube (10) in the preheating chamber (212), and form a concentrated heating zone for concentratedly heating the heat exchange tube (10) in the main heating chamber (211).

5. The cylindrical ammonia cracking device according to claim 4, characterized in that: The deflector assembly (6) is further comprised, wherein the deflector assembly (6) is adapted to form a first serpentine channel (64) and a second serpentine channel (65) in the main heating chamber (211) and the preheating heating chamber (212), wherein the first serpentine channel (64) and the second serpentine channel (65) are in communication with each other at a side away from the first partition (2); The heating medium inlet (23) is suitable for outputting the heating medium to the side of the first serpentine channel (64) close to the first partition (2), and the heating medium outlet (24) is suitable for connecting to the side of the second serpentine channel (65) close to the first partition (2), so that the temperature in the first serpentine channel (64) and the second serpentine channel (65) decreases along the flow direction of the heating medium.

6. The cylindrical ammonia cracking device according to claim 5, characterized in that: The baffle assembly (6) comprises a plurality of baffles (61) located in the main heating chamber (211) and the preheating chamber (212), wherein the baffles (61) and the corresponding side walls of the main heating chamber (211) and the preheating chamber (212) form the first serpentine channel (64) and the second serpentine channel (65); The deflector assembly (6) further comprises a pull rod (62) and a distance tube (63), wherein the pull rods (62) are provided in two numbers and are both supported on the first partition (2), and the pull rods (62) extend toward the main heating chamber (211) and the preheating chamber (212) respectively; the distance tubes (63) are provided in a plurality and are all axially sleeved on the corresponding pull rods (62); A limiting area of ​​the baffle (61) is formed between the coaxial adjacent distance tubes (63) to limit the distance between the adjacent baffles (61).

7. The cylindrical ammonia cracking device according to claim 6, characterized in that: It also includes a first medium pipe (7), one end of which extends into the heating chamber (21) and is detachably connected to the first partition (2), and a first opening is formed on a side of the first medium pipe (7) close to the first partition (2), and the first opening faces the main heating chamber (211); The first opening faces the first serpentine channel (64) and is close to a side of the first partition (2); Two third partition plates (5) are provided, and mounting grooves capable of supporting the third partition plates (5) are provided on both sides of the first medium pipe (7); The axial cross-section of the first medium pipeline (7) is rectangular; The cylindrical ammonia cracking device further comprises a second medium pipeline (8), one end of which passes through the shell (1) and extends to the heating chamber (21), and is detachably sealed and connected to an end of the first medium pipeline (7) away from the first partition (2).

8. The cylindrical ammonia cracking device according to claim 7, characterized in that: The housing (1) is a cylindrical structure, comprising a first shell (11) and a second shell (12) detachably connected to each other, and the first partition (2) is sandwiched between the first shell (11) and the second shell (12); The first partition (2) and the deflector (61) extend in a direction perpendicular to the axis of the shell (1); the second partition (3), the third partition (5), the first medium pipeline (7), the second medium pipeline (8) and the pull rod (62) all extend in a direction along the axis of the shell (1); and the heat exchange tube (10) is a U-shaped tube.

9. The cylindrical ammonia cracking device according to claim 7, characterized in that: It also includes an anti-impact plate (9) supported in the main heating chamber (211), wherein the anti-impact plate (9) is located outside the corresponding heat exchange tube (10) closer to the first opening, so that the medium output from the first opening is dispersed by the anti-impact plate (9).

10. The cylindrical ammonia cracking device according to claim 4, characterized in that: The first partition plate (2) is provided with a pair of connection holes (25), the two pairs of connection holes (25) being located in the main heating chamber (211) and the preheating chamber (212), respectively, and the end of each heat exchange tube (10) is supported in the corresponding connection hole (25); The connection holes (25) are evenly distributed on the first partition plate (2).

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