Methanation temperature rising equipment for synthetic ammonia production line

Abstract

The present application relates to the technical fields of synthetic ammonia production, in particular to a methanation heating equipment for synthetic ammonia production line, which comprises a first fixed mounting plate, a hot air box, a heating control main body, a cooling main body and a cooling conveying main body, and the hot air box is fixedly arranged at the upper end of the first fixed mounting plate. The raw material gas can be conveyed to the inside of the heating tank through the conveying pipe, and the hot air box can heat the bottom of the heating tank at this time, and the symmetrical protective heat preservation cover distributed on both sides of the heating tank can gather heat on the outside of the heating tank for a long time, and the gas in the heating tank can be continuously heated, so that the carbon monoxide and nitrogen in the heated raw material gas react with the catalyst in the heating tank to produce methane, so that the carbon monoxide and nitrogen in the raw material gas can be cleaned and removed, and the quality of the prepared synthetic ammonia is excellent.

Description

Technical Field

[0001] This invention relates to the field of synthetic ammonia production technology, specifically to a methanation heating device for a synthetic ammonia production line. Background Technology

[0002] The methanation heating equipment in a synthetic ammonia production line is used to convert carbon monoxide and nitrogen in the feed gas into methane. During synthetic ammonia production, the feed gas typically contains a certain amount of carbon monoxide and nitrogen. These gases react with a catalyst at high temperatures to produce methane. The methanation heating equipment is used to provide the temperature required for this reaction. Existing technologies cannot quickly and completely convert carbon monoxide and nitrogen in the feed gas into methane during synthetic ammonia production, resulting in poor quality synthetic ammonia. Therefore, a device is needed to solve this problem. Summary of the Invention

[0003] To address the problems in the prior art, this invention provides a methanation heating device for a synthetic ammonia production line.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a methanation heating device for a synthetic ammonia production line, comprising a first fixed mounting plate, a hot air box, a heating control body, a cooling body, and a cooling conveying body. The hot air box is fixedly installed on the upper end of the first fixed mounting plate, the heating control body is installed above the hot air box, the cooling conveying body is installed at the end of the heating control body, and the cooling body is installed outside the cooling conveying body.

[0005] Preferably, the heating control body includes an adjustment control unit, a fixed limiting plate, a protective heat insulation cover, and a heating unit. The protective heat insulation covers are symmetrically arranged, and the heating unit is located between the two protective heat insulation covers. The fixed limiting plates are symmetrically distributed, and the two ends of the protective heat insulation covers are slidably engaged inside the fixed limiting plates. The adjustment control unit is disposed on the protective heat insulation covers.

[0006] Preferably, the adjustment and control unit includes a fixed mounting frame, a first synchronous drive rod, a first synchronous rotating wheel, a first synchronous rotating belt, a second synchronous rotating belt, a motor, a mounting support frame, a first sliding adjustment toothed plate, a second synchronous rotating wheel, a drive adjustment gear, and a second synchronous drive rod. The second synchronous drive rod and the first synchronous drive rod are symmetrically arranged, with the first synchronous drive rod located on the outside of the second synchronous drive rod. The drive adjustment gear is fixedly connected to the end of the second synchronous drive rod. The first sliding adjustment toothed plates are symmetrically distributed on both sides of the drive adjustment gear, and the drive adjustment gear is located between the two first sliding adjustment toothed plates. The drive adjustment gear meshes with the first sliding adjustment toothed plates. The second synchronous rotating wheel is fixedly connected to the middle of the outer end of the drive adjustment gear. The first synchronous rotating wheel is fixedly connected to the end of the first synchronous drive rod. The first synchronous rotating belt is rotatably connected between the second synchronous rotating wheel and the first synchronous rotating wheel. The second synchronous rotating belt is rotatably connected between the first synchronous rotating wheels. The first synchronous drive rod is rotatably engaged with the fixed mounting frame. The motor is fixedly mounted on the mounting support frame, and the drive end of the motor is fixedly connected to the middle of the outer end of the first synchronous rotating wheel located at the bottom.

[0007] Preferably, the heating section includes a delivery pipe, a first electric valve, a heating tank, a second electric valve, a thermometer, a temperature sensor, and the delivery pipe. The first electric valve is fixedly connected to the front end of the heating tank, the delivery pipe is fixedly connected to the first electric valve, the delivery pipe is fixedly connected to the end of the heating tank, the second electric valve is fixedly installed on the delivery pipe, the temperature sensor is fixedly installed on the delivery pipe and located between the heating tank and the second electric valve, and the thermometer is fixedly connected to the temperature sensor.

[0008] Preferably, the cooling conveying body includes a connecting conveying plate, a spiral cooling pipe, and a first conveying connecting pipe, wherein the spiral cooling pipe is fixedly connected to the connecting conveying plate, and the first conveying connecting pipe is fixedly connected to the end of the spiral cooling pipe.

[0009] Preferably, the cooling body includes a second fixed mounting plate, a support frame, a second conveying connection pipe, a cooling plate, and nozzles. The support frame is symmetrically fixedly connected to both sides of the second fixed mounting plate. The cooling plate is fixedly connected to the upper end of the support frame. The nozzles are uniformly fixedly arranged on the inner side of the cooling plate. The second conveying connection pipe is fixedly connected to the cooling plate through a third electric valve.

[0010] Preferably, the first sliding adjusting tooth plate is fixedly connected to the symmetrically arranged protective heat insulation covers by bolts, and the fixed mounting frame is fixedly connected to the fixed limiting plate.

[0011] Preferably, the hot air box is located directly below the heating tank, and the end of the conveying pipe is fixedly connected to the connecting conveying plate.

[0012] Preferably, the protective heat insulation cover is made of polyurethane.

[0013] Preferably, safety valves are fixedly installed on both ends of the heating tank, and auxiliary conveying return pipes are fixedly connected to the safety valves.

[0014] The beneficial effects of this invention are:

[0015] I. This invention allows the raw material gas to be transported into the heating tank via a conveying pipe. At this time, the hot air box can heat the bottom of the heating tank. Furthermore, due to the symmetrically arranged protective insulation covers distributed on both sides of the heating tank, heat can be accumulated on the outside of the heating tank for a long time, which can continuously heat the gas inside the heating tank. This allows the carbon monoxide and nitrogen in the heated raw material gas to react with the catalyst inside the heating tank to produce methane. As a result, the carbon monoxide and nitrogen in the raw material gas can be removed, resulting in high-quality synthetic ammonia.

[0016] II. In this invention, when the temperature sensor detects a low temperature, it indicates insufficient heating inside the heating tank. At this time, the second electric valve reduces the efficiency of the delivery pipe. Simultaneously, the external controller receives information from the temperature sensor and automatically controls the motor. The motor, through a first synchronous rotating wheel and a second synchronous rotating belt, enables the first and second synchronous rotating wheels to rotate synchronously. The rotating second synchronous rotating wheel, through a second synchronous drive rod and a first synchronous drive rod, drives the adjusting gear to rotate synchronously. The synchronously rotating adjusting gear, by driving symmetrically distributed first sliding adjusting gear plates, allows the two protective insulation covers to slide synchronously along the fixed limiting plate towards one side of the heating tank, reducing the gap between the protective insulation covers and the heating tank. This allows the hot air blown from the hot air box to better heat the heating tank. Conversely, when the temperature sensor detects a high temperature, the protective insulation covers are automatically moved towards the outside of the heating tank, lowering the temperature inside the heating tank and ensuring that the temperature rise is within a reasonable and controllable range. This system can be automatically adjusted and controlled. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a three-dimensional structural diagram of the main body from a frontal perspective in this invention;

[0019] Figure 2 This is a side view of the three-dimensional structure of the main body in this invention;

[0020] Figure 3 This is a schematic diagram of the main structure of the heating control system in this invention;

[0021] Figure 4 This is a schematic diagram of the protective heat insulation cover structure in this invention;

[0022] Figure 5 This is a schematic diagram of the adjustment and control unit structure in this invention;

[0023] Figure 6 This is a schematic diagram of the heating section structure in this invention;

[0024] Figure 7 This is a schematic diagram of the bottom structure of the fixed main body in this invention;

[0025] Figure 8 This is a schematic diagram of the cooling conveying main structure in this invention;

[0026] Figure 9 This is a schematic diagram of the cooling main structure in this invention;

[0027] Figure 10 This is a side view of the three-dimensional structure of the cooling body in this invention.

[0028] In the diagram: 1-First fixed mounting plate, 2-Hot air box, 3-Heating control body, 4-Cooling body, 5-Cooling conveying body, 51-Adjustment control unit, 6-Fixed limit plate, 7-Protective insulation cover, 71-Heating unit, 8-Fixed mounting frame, 9-First synchronous drive rod, 10-First synchronous rotating wheel, 11-First synchronous rotating belt, 12-Second synchronous rotating belt, 13-Motor, 14-Mounting support frame, 15-First sliding adjusting toothed plate, 16-Second synchronous rotating wheel, 17 - Drive adjustment gear, 18- Second synchronous drive rod, 19- Conveying pipe, 20- First electric valve, 21- Heating tank, 22- Safety valve, 23- Auxiliary conveying return pipe, 24- Second electric valve, 25- Thermometer, 26- Temperature sensor, 27- Conveying pipe, 28- Connecting conveying disc, 29- Spiral cooling pipe, 30- First conveying connecting pipe, 31- Second fixed mounting plate, 32- Support frame, 33- Second conveying connecting pipe, 34- Cooling plate, 35- Nozzle, 36- Third electric valve. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] The invention will be further described below with reference to the accompanying drawings. Example 1

[0032] like Figure 1 and Figure 2 As shown, a methanation heating device for a synthetic ammonia production line according to the present invention includes a first fixed mounting plate 1, a hot air box 2, a heating control body 3, a cooling body 4, and a cooling conveying body 5. The hot air box 2 is fixedly installed at the upper end of the first fixed mounting plate 1, the heating control body 3 is installed above the hot air box 2, the cooling conveying body 5 is installed at the end of the heating control body 3, and the cooling body 4 is installed outside the cooling conveying body 5.

[0033] like Figure 3 and Figure 4 As shown, the heating control body 3 includes an adjustment control unit 51, a fixed limiting plate 6, a protective heat insulation cover 7, and a heating unit 71. The protective heat insulation covers 7 are symmetrically arranged, and the heating unit 71 is located between the two protective heat insulation covers 7. The fixed limiting plates 6 are symmetrically distributed, and the two ends of the protective heat insulation covers 7 are slidably engaged inside the fixed limiting plates 6. The adjustment control unit 51 is set on the protective heat insulation covers 7 and plays a limiting role through the fixed limiting plates 6.

[0034] like Figure 5As shown, the adjustment and control unit 51 includes a fixed mounting frame 8, a first synchronous drive rod 9, a first synchronous rotating wheel 10, a first synchronous rotating belt 11, a second synchronous rotating belt 12, a motor 13, a mounting support frame 14, a first sliding adjustment gear plate 15, a second synchronous rotating wheel 16, a drive adjustment gear 17, and a second synchronous drive rod 18. The second synchronous drive rod 18 and the first synchronous drive rod 9 are symmetrically arranged, with the first synchronous drive rod 9 located outside the second synchronous drive rod 18. The drive adjustment gear 17 is fixedly connected to the end of the second synchronous drive rod 18. The first sliding adjustment gear plates 15 are symmetrically distributed on both sides of the drive adjustment gear 17, and the drive adjustment gear 17 is located between the two first sliding adjustment gear plates 15, meshing with the first sliding adjustment gear plates 15. The second synchronous rotating wheel 16 is fixedly connected to the middle of the outer end of the drive adjustment gear 17. The first synchronous rotating wheel 10 is fixedly connected to the end of the first synchronous drive rod 9. The first synchronous rotating belt 11 is rotatably connected to the second synchronous rotating wheel 16 and the first synchronous drive rod 9. Between the first synchronous rotating wheel 10, the second synchronous rotating belt 12 is rotatably connected between the first synchronous rotating wheel 10. The first synchronous drive rod 9 is rotatably engaged on the fixed mounting frame 8. The motor 13 is fixedly mounted on the mounting support frame 14. The drive end of the motor 13 is fixedly connected to the middle of the outer end of the first synchronous rotating wheel 10 located at the bottom. The running motor 13 can make the first synchronous rotating wheel 10 and the second synchronous rotating wheel 16 rotate synchronously through the first synchronous rotating wheel 10, the second synchronous rotating belt 12, and the first synchronous rotating belt 11. The rotating second synchronous rotating wheel 16 can drive the adjusting gear 17 to rotate synchronously through the second synchronous drive rod 18 and the first synchronous drive rod 9. The synchronously rotating driving adjusting gear 17 can drive the two protective heat insulation covers 7 to slide synchronously along the fixed limiting plate 6 towards one side of the heating tank 21 by driving the symmetrically distributed first sliding adjusting tooth plate 15, thereby reducing the gap between the protective heat insulation cover 7 and the heating tank 21, so that the hot air blown out of the hot air box 2 can better heat the heating tank 21.

[0035] like Figure 6 and Figure 7 As shown, the heating unit 71 includes a delivery pipe 19, a first electric valve 20, a heating tank 21, a second electric valve 24, a thermometer 25, a temperature sensor 26, and a delivery pipe 27. The first electric valve 20 is fixedly connected to the front end of the heating tank 21, the delivery pipe 19 is fixedly connected to the first electric valve 20, the delivery pipe 27 is fixedly connected to the end of the heating tank 21, the second electric valve 24 is fixedly installed on the delivery pipe 27, the temperature sensor 26 is fixedly installed on the delivery pipe 27, and the temperature sensor 26 is located between the heating tank 21 and the second electric valve 24. The thermometer 25 is fixedly connected to the temperature sensor 26.

[0036] like Figure 8As shown, the cooling conveying body 5 includes a connecting conveying plate 28, a spiral cooling pipe 29, and a first conveying connecting pipe 30. The spiral cooling pipe 29 is fixedly connected to the connecting conveying plate 28, and the first conveying connecting pipe 30 is fixedly connected to the end of the spiral cooling pipe 29. The raw material gas can be conveyed to the inside of the heating tank 21 through the conveying pipe 19. At this time, the hot air box 2 can heat the bottom of the heating tank 21. Since the protective heat insulation cover 7 is symmetrically arranged on both sides of the heating tank 21, heat can be accumulated on the outside of the heating tank 21 for a long time, and the gas inside the heating tank 21 can be continuously heated.

[0037] like Figure 9 and Figure 10 As shown, the cooling body 4 includes a second fixed mounting plate 31, a support frame 32, a second conveying connection pipe 33, a cooling plate 34, and nozzles 35. The support frame 32 is symmetrically fixedly connected to both sides of the second fixed mounting plate 31. The cooling plate 34 is fixedly connected to the upper end of the support frame 32. The nozzles 35 are evenly fixedly arranged on the inner side of the cooling plate 34. The second conveying connection pipe 33 is fixedly connected to the cooling plate 34 through a third electric valve 36. Connecting the external water supply hose to the second conveying connection pipe 33 allows each nozzle 35 to spray water mist to cool the spiral cooling pipe 29 and the gas conveyed inside, so that the cooled gas can continue to be used for the synthesis of ammonia.

[0038] The first sliding adjustment toothed plate 15 is fixedly connected to the symmetrically arranged protective heat insulation cover 7 by bolts, and the fixed installation frame 8 is fixedly connected to the fixed limit plate 6 to play a limiting role.

[0039] The hot air box 2 is located directly below the heating tank 21, and the end of the conveying pipe 27 is fixedly connected to the connecting conveying plate 28, which can continuously convey gas.

[0040] The protective heat insulation cover 7 is made of polyurethane, which can play a role in heat preservation.

[0041] The working principle of Example 1 is as follows: During use, the raw material gas can be transported to the interior of the heating tank 21 through the conveying pipe 19, and at this time, the hot air box 2 can heat the bottom of the heating tank 21. Since the protective heat insulation cover 7 is symmetrically arranged on both sides of the heating tank 21, the heat can be accumulated on the outside of the heating tank 21 for a long time, and the gas inside the heating tank 21 can be continuously heated. This allows the carbon monoxide and nitrogen in the heated raw material gas to react with the catalyst inside the heating tank 21 to produce methane, thereby cleaning and removing the carbon monoxide and nitrogen in the raw material gas, resulting in excellent quality of the synthesized ammonia.

[0042] The treated gas discharged from the heating tank 21 can be transported to the interior of the spiral cooling tube 29 through the conveying pipe 27. When the gas is transported inside the spiral cooling tube 29, the external water supply hose is connected to the second conveying connection pipe 33, so that each nozzle 35 sprays water mist to cool the spiral cooling tube 29 and the gas transported inside, so that the cooled gas can continue to be used for the synthesis of ammonia.

[0043] When the gas in the heating tank 21 is conveyed through the delivery pipe 27, the temperature sensor 26 can detect the gas temperature and display it on the temperature gauge 25. When the temperature is low, it indicates that the heating tank 21 is not heating sufficiently. At this time, the second electric valve 24 reduces the efficiency of the delivery pipe 27. Meanwhile, the external controller receives the information from the temperature sensor 26 and automatically controls the motor 13 to run. The running motor 13 enables the first synchronous rotating wheel 10 and the second synchronous rotating belt 12 and the first synchronous rotating belt 11 to rotate synchronously. The rotating second synchronous rotating wheel 16 can be driven by the second synchronous drive. Rod 18 and the first synchronous drive rod 9 cause the drive adjustment gear 17 to rotate synchronously. The synchronously rotating drive adjustment gear 17 drives the symmetrically distributed first sliding adjustment gear plate 15, which allows the two protective heat insulation covers 7 to slide synchronously along the fixed limit plate 6 towards one side of the heating tank 21, reducing the gap between the protective heat insulation cover 7 and the heating tank 21. This allows the hot air blown out of the hot air box 2 to better heat the heating tank 21. Conversely, when the temperature sensor 26 detects a high temperature, it automatically controls the protective heat insulation cover 7 to move towards the outside of the heating tank 21, thereby reducing the temperature of the heating tank 21 and its interior, ensuring that the temperature rise is within a reasonable and controllable range, and can be automatically adjusted and controlled. Example 2

[0044] Based on Example 1, such as Figure 6 and Figure 7 As shown, safety valves 22 are fixedly installed on both ends of the heating tank 21, and auxiliary conveying return pipes 23 are fixedly connected to the safety valves 22.

[0045] In implementing this embodiment, safety valves 22 are installed on both sides of the end of the heating tank 21. When the pressure inside the heating tank 21 is too high, especially during the heating process, the internal pressure of the heating tank 21 will change. The safety valves 22 and the auxiliary conveying return pipe 23 can guide and convey the raw material gas inside the heating tank 21 when the internal pressure is too high, thus playing a safety protection role.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A methanation heating device for a synthetic ammonia production line, comprising a first fixed mounting plate (1), a hot air box (2), a heating control body (3), a cooling body (4), and a cooling conveying body (5), characterized in that: The hot air box (2) is fixedly installed on the upper end of the first fixed mounting plate (1), the heating control body (3) is installed above the hot air box (2), the cooling conveying body (5) is installed at the end of the heating control body (3), and the cooling body (4) is installed outside the cooling conveying body (5). The heating control body (3) includes an adjustment control unit (51), a fixed limiting plate (6), a protective heat insulation cover (7), and a heating unit (71). The protective heat insulation covers (7) are symmetrically arranged, and the heating unit (71) is located between the two protective heat insulation covers (7). The fixed limiting plates (6) are symmetrically distributed, and the two ends of the protective heat insulation covers (7) are slidably engaged inside the fixed limiting plates (6). The adjustment control unit (51) is arranged on the protective heat insulation covers (7). The adjustment control unit (51) includes a fixed mounting frame (8), a first synchronous drive rod (9), a first synchronous rotating wheel (10), a first synchronous rotating belt (11), a second synchronous rotating belt (12), a motor (13), a mounting support frame (14), a first sliding adjustment gear plate (15), a second synchronous rotating wheel (16), a drive adjustment gear (17), and a second synchronous drive rod (18). The second synchronous drive rod (18) and the first synchronous drive rod (9) are symmetrically arranged. The first synchronous drive rod (9) is located outside the second synchronous drive rod (18). The drive adjustment gear (17) is fixedly connected to the end of the second synchronous drive rod (18). The first sliding adjustment gear plate (15) is symmetrically distributed on both sides of the drive adjustment gear (17), and the drive adjustment gear (17) is located on both sides of the first sliding adjustment gear. Between the toothed plates (15), the driving adjustment gear (17) meshes with the first sliding adjustment toothed plate (15), the second synchronous rotating wheel (16) is fixedly connected to the middle of the outer end of the driving adjustment gear (17), the first synchronous rotating wheel (10) is fixedly connected to the end of the first synchronous driving rod (9), the first synchronous rotating belt (11) is rotatably connected between the second synchronous rotating wheel (16) and the first synchronous rotating wheel (10), the second synchronous rotating belt (12) is rotatably connected between the first synchronous rotating wheel (10), the first synchronous driving rod (9) is rotatably snapped onto the fixed mounting frame (8), the motor (13) is fixedly mounted on the mounting support frame (14), and the driving end of the motor (13) is fixedly connected to the middle of the outer end of the first synchronous rotating wheel (10) located at the bottom; When the gas in the heating tank (21) is transported by the delivery pipe (27), the temperature sensor (26) detects the temperature of the gas and displays the temperature on the temperature gauge (25). When the temperature is low, it indicates that the heating tank (21) is not heated enough. At this time, the second electric valve (24) reduces the efficiency of the delivery pipe (27). At this time, the external controller receives the information from the temperature sensor (26) and automatically controls the motor (13) to run. This causes the two protective insulation covers (7) to slide synchronously along the fixed limiting plate (6) toward one side of the heating tank (21), reducing the gap between the protective insulation cover (7) and the heating tank (21), so that the hot air blown out of the hot air box (2) can better heat the heating tank (21). Conversely, when the temperature sensor (26) detects that the temperature is too high, the protective insulation cover (7) is automatically controlled to move toward the outside of the heating tank (21), so that the temperature of the heating tank (21) and its interior is reduced, thereby ensuring that the temperature rise is within a reasonable and controllable range.

2. The methanation heating equipment for a synthetic ammonia production line according to claim 1, characterized in that: The heating unit (71) includes a delivery pipe (19), a first electric valve (20), a heating tank (21), a second electric valve (24), a thermometer (25), a temperature sensor (26), and a delivery pipe (27). The first electric valve (20) is fixedly connected to the front end of the heating tank (21). The delivery pipe (19) is fixedly connected to the first electric valve (20). The delivery pipe (27) is fixedly connected to the end of the heating tank (21). The second electric valve (24) is fixedly installed on the delivery pipe (27). The temperature sensor (26) is fixedly installed on the delivery pipe (27) and is located between the heating tank (21) and the second electric valve (24). The thermometer (25) is fixedly connected to the temperature sensor (26).

3. The methanation heating equipment for a synthetic ammonia production line according to claim 2, characterized in that: The cooling conveying body (5) includes a connecting conveying plate (28), a spiral cooling pipe (29) and a first conveying connecting pipe (30). The spiral cooling pipe (29) is fixedly connected to the connecting conveying plate (28), and the first conveying connecting pipe (30) is fixedly connected to the end of the spiral cooling pipe (29).

4. The methanation heating equipment for a synthetic ammonia production line according to claim 3, characterized in that: The cooling body (4) includes a second fixed mounting plate (31), a support frame (32), a second conveying connection pipe (33), a cooling plate (34), and a nozzle (35). The support frame (32) is symmetrically fixedly connected to both sides of the second fixed mounting plate (31). The cooling plate (34) is fixedly connected to the upper end of the support frame (32). The nozzle (35) is uniformly fixedly arranged on the inner end of the cooling plate (34). The second conveying connection pipe (33) is fixedly connected to the cooling plate (34) through a third electric valve (36).

5. The methanation heating device for a synthetic ammonia production line according to claim 4, characterized in that: The first sliding adjustment tooth plate (15) is fixedly connected to the symmetrically arranged protective heat insulation cover (7) by bolts, and the fixed installation frame (8) is fixedly connected to the fixed limiting plate (6).

6. The methanation heating device for a synthetic ammonia production line according to claim 5, characterized in that: The hot air box (2) is located directly below the heating tank (21), and the end of the conveying pipe (27) is fixedly connected to the connecting conveying plate (28).

7. The methanation heating device for a synthetic ammonia production line according to claim 6, characterized in that: The protective heat insulation cover (7) is made of polyurethane.

8. The methanation heating device for a synthetic ammonia production line according to claim 7, characterized in that: Safety valves (22) are fixedly installed on both ends of the heating tank (21), and auxiliary conveying return pipes (23) are fixedly connected to the safety valves (22).

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