Hydrogen extraction device and ammonia synthesis device

Abstract

The hydrogen extraction device comprises a desorption assembly and a gas conveying pipeline, the desorption assembly is provided with an exhaust port, the exhaust port is used for exhausting desorbed tail gas, the input end of the gas conveying pipeline is communicated with the exhaust port, and the output end of the gas conveying pipeline comprises a first output end and a second output end; the first output end is used for communicating with a heating device, and the second output end is used for communicating with a combustion device. After the desorbed tail gas is conveyed to the heating device through the gas conveying pipeline, the desorbed tail gas becomes a fuel source of the heating device, so that the tail gas is recycled, the fuel cost of the heating device is reduced, the heating efficiency of the heating device is improved, and the purposes of reducing cost and improving efficiency are achieved. And moreover, the gas conveying pipeline reduces the tail gas conveyed to the combustion device, so that combustion gas generated in the combustion process of the tail gas is reduced, the influence of the combustion device on the environment is reduced, and the effects of energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of hydrogen processing, and in particular to a hydrogen extraction device and an ammonia synthesis device. Background Art

[0002] The main purpose of the hydrogen extraction device is to use PSA (Pressure Swing Absorption) to absorb carbon monoxide, carbon dioxide, water, etc. in the process gas from the isothermal conversion furnace, and obtain 99.9% hydrogen to be sent to the hydrogen combined compressor for pressure increase.

[0003] In the related art, the hydrogen extraction device needs to perform desorption operation during the inversion and flushing process. The desorption process will produce tail gas. In order to eliminate the tail gas, the tail gas needs to be burned. During the combustion process, a large amount of combustion gas will be generated, which will have a certain degree of impact on the environment. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, a first aspect of the present invention provides a hydrogen extraction device.

[0006] A second aspect of the present invention provides an ammonia synthesis plant.

[0007] In view of this, according to the first aspect of the technical solution of the present application, a hydrogen extraction device is proposed, which includes: a desorption component and a gas pipeline, the desorption component is provided with an exhaust port, the exhaust port is used to discharge the exhaust gas after desorption, the input end of the gas pipeline is connected to the exhaust port, and the output end of the gas pipeline includes a first output end and a second output end, the first output end is used to connect with a heating device, and the second output end is used to connect with a combustion device.

[0008] In some technical solutions provided in the present application, optionally, the gas pipeline includes: a first pipeline, a second pipeline and a third pipeline. The output end of the first pipeline is the first output end, the output end of the second pipeline is the second output end, the inlet end of the third pipeline is the input end of the gas pipeline, and the inlet ends of the first pipeline and the second pipeline are respectively connected to the outlet end of the third pipeline.

[0009] In some technical solutions provided in the present application, optionally, the hydrogen extraction device further includes a first valve, and the first valve is arranged in the second pipeline.

[0010] In some technical solutions provided in the present application, optionally, the first valve is a pressure valve, and the pressure collection point of the pressure valve is located in the third pipeline.

[0011] In some technical solutions provided in the present application, optionally, the hydrogen device also includes: a second valve and / or a third valve, the second valve is arranged in the second pipeline, the second valve is located between the first valve and the combustion device, and the third valve is arranged in the first pipeline.

[0012] In some technical solutions provided in the present application, optionally, the gas pipeline further includes a fan, and the fan is used to blow the gas at the input end of the gas pipeline to the output end of the gas pipeline.

[0013] In some technical solutions provided in the present application, optionally, the hydrogen extraction device further includes a gas collecting bin, the output end of the gas transmission pipeline further includes a third output end, and the gas collecting bin is connected to the third output end.

[0014] The second technical solution of the present application provides an ammonia synthesis device, which includes: a combustion device, a heating device and a hydrogen extraction device provided by any of the above-mentioned first technical solutions of the present application. The combustion device is connected to the second output end, and the heating device includes an air intake pipeline, which is connected to the first output end.

[0015] In some technical solutions provided in the present application, optionally, the heating device also includes a gas pipeline, the gas pipeline is connected to the air intake pipeline, a fourth valve is provided on the gas pipeline, and the first output end is located between the fourth valve and the air intake pipeline.

[0016] In some technical solutions provided in the present application, optionally, the heating device also includes a flame arrester, and the flame arrester is arranged on the air intake pipeline.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] After the desorbed tail gas is sent to the heating device through the gas pipeline, it becomes the fuel source of the heating device, so that the tail gas can be recycled and reused, reducing the fuel cost of the heating device, improving the heating efficiency of the heating device, and achieving the purpose of reducing costs and increasing efficiency. In addition, the gas pipeline reduces the tail gas transported to the combustion device, thereby reducing the combustion gas generated by the tail gas during the combustion process, reducing the impact of the combustion device on the environment, and achieving the effect of energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0020] Figure 1 A schematic structural diagram of an ammonia synthesis device according to an embodiment of the present application.

[0021] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0022] 10 hydrogen extraction device, 100 desorption component, 200 gas transmission pipeline, 210 first pipeline, 211 first output end, 220 second pipeline, 221 second output end, 230 third pipeline, 300 first valve, 400 second valve, 500 third valve, 600 buffer tank, 700 flushing pipeline, 20 heating device, 21 air intake pipeline, 22 gas pipeline, 23 fourth valve, 24 flame arrester, 30 combustion device. DETAILED DESCRIPTION

[0023] In order to better understand the above-mentioned technical scheme, the technical scheme of the embodiments of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the embodiments of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0024] The first embodiment of the present application provides a hydrogen extraction device 10, such as Figure 1 As shown, the hydrogen extraction device 10 includes: a desorption component 100 and a gas pipeline 200, the desorption component 100 is provided with an exhaust port, the exhaust port is used to discharge the exhaust gas after desorption, the input end of the gas pipeline 200 is connected to the exhaust port, and the output end of the gas pipeline 200 includes a first output end 211 and a second output end 221, the first output end 211 is used to communicate with the heating device 20, and the second output end 221 is used to communicate with the combustion device 30.

[0025] In this embodiment, in the desorption assembly 100, the adsorbed impurities are desorbed from the adsorbent in large quantities, and the desorbed tail gas is discharged through the exhaust port, and the discharged tail gas enters the gas transmission pipeline 200. It should be noted that since the tail gas contains more than 21% hydrogen, it has been verified by experiments that the tail gas can be burned and has a certain calorific value.

[0026] The gas pipeline 200 is provided with two output ends, namely, a first output end 211 and a second output end 221. The first output end 211 and the second output end 221 are respectively connected to the heating device 20 and the combustion device 30, so that the tail gas in the gas pipeline 200 can enter the combustion device 30 to be burned completely, and can also enter the heating device 20 to provide heat for the heating device 20. According to the calculation of the combustible gas content in the tail gas, the calorific value of each cubic meter of tail gas is about 200Kcal, and the tail gas volume is 3000NM 3 / h, 85 kg of standard coal can be saved per hour, and the exhaust gas entering the heating device 20 can achieve an economic benefit of about 480,000 yuan per year.

[0027] Exemplarily, the hydrogen extraction device 10 further includes a control device, and when the heating device 20 is in a working state, the control device inputs the tail gas into the heating device 20. When the heating device 20 is in an idle state, the control device inputs the tail gas into the combustion device 30.

[0028] For example, the heating device 20 may be a flare system, and the combustion device 30 may be a boiler system. The buffer tank 600 in the reverse venting process is connected to the desorption assembly 100 , and the flushing gas of the adsorption tower enters the desorption assembly 100 through the flushing pipeline 700 .

[0029] After the desorbed tail gas is sent to the heating device 20 through the gas pipeline 200, it becomes the fuel source of the heating device 20, so that the tail gas is recycled and reused, reducing the fuel cost of the heating device 20, improving the heating efficiency of the heating device 20, and achieving the purpose of reducing costs and increasing efficiency. In addition, the gas pipeline 200 reduces the tail gas transported to the combustion device 30, thereby reducing the combustion gas generated by the tail gas during the combustion process, reducing the impact of the combustion device 30 on the environment, and achieving the effect of energy saving and emission reduction.

[0030] In some embodiments provided in this application, Figure 1 As shown, optionally, the gas pipeline 200 includes: a first pipeline 210, a second pipeline 220 and a third pipeline 230. The output end of the first pipeline 210 is a first output end 211, the output end of the second pipeline 220 is a second output end 221, the inlet end of the third pipeline 230 is the input end of the gas pipeline 200, and the inlet ends of the first pipeline 210 and the second pipeline 220 are respectively connected to the outlet end of the third pipeline 230.

[0031] In this embodiment, the tail gas discharged from the desorption component 100 is discharged through the exhaust port and enters the third pipeline 230. The tail gas in the third pipeline 230 can enter the heating device 20 through the first pipeline 210 and enter the combustion device 30 through the second pipeline 220. The first pipeline 210 and the second pipeline 220 are both connected to the desorption component 100 through the third pipeline 230. Therefore, no matter whether the first pipeline 210 or the second pipeline 220 is connected, the control device can monitor the operation of the third pipeline 230 to grasp the gas transmission situation in the first pipeline 210 or the second pipeline 220, thereby avoiding the need to set monitoring components on both the first pipeline 210 and the second pipeline 220, thereby improving the convenience of monitoring and control of the gas transmission pipeline 200.

[0032] In some embodiments provided in this application, Figure 1 As shown, optionally, the hydrogen extraction device 10 further includes a first valve 300 , and the first valve 300 is disposed in the second pipeline 220 .

[0033] In this embodiment, a first valve 300 is provided on the second pipeline 220. Exemplarily, a control device is connected to the first valve 300. The control device can control the opening and closing state of the first valve 300 to control the on-off state of the second pipeline 220, thereby controlling whether the exhaust gas enters the combustion device 30, thereby improving the controllability of the exhaust gas in the second pipeline 220.

[0034] In some embodiments provided in this application, Figure 1 As shown, optionally, the first valve 300 is a pressure valve, and the pressure collection point of the pressure valve is located in the third pipeline 230 .

[0035] In this embodiment, the first valve 300 is a pressure valve, and the pressure valve is controlled to open and close by the pressure at the pressure collection point. When the collected pressure is greater than the pressure threshold, the pressure valve is opened, and the second pipeline 220 is connected to the combustion device 30. When the collected pressure is less than the pressure threshold, the pressure valve is closed, and the second pipeline 220 is disconnected from the combustion device 30.

[0036] The pressure collection point of the pressure valve is located in the third pipeline 230 to collect the pipeline pressure in the third pipeline 230. When the tail gas enters the heating device 20 through the first pipeline 210, the pressure valve controls the on-off state of the second pipeline 220 according to the pipeline pressure in the third pipeline 230. When the pressure collected by the pressure valve is less than the pressure threshold, that is, the pipeline pressure in the third pipeline 230 is within the normal range, indicating that the operation in the first pipeline 210 is normal, the pressure valve controls the second pipeline 220 to be in a closed state to ensure that the tail gas enters the heating device 20 and prevents the tail gas from entering the combustion device 30. When the pressure collected by the pressure valve is greater than the pressure threshold, that is, the pipeline pressure in the third pipeline 230 exceeds the standard, indicating that the operation in the first pipeline 210 is abnormal, the pressure valve controls the second pipeline 220 to open, so that the tail gas enters the combustion device 30. When the heating device 20 cannot receive the tail gas, the hydrogen extraction device 10 can still discharge the tail gas normally.

[0037] Exemplarily, the pressure threshold is 10 kpg to 20 kpg, and the pressure threshold may be 15 kpg.

[0038] In some embodiments provided in this application, Figure 1 As shown, optionally, the hydrogen device further includes: a second valve 400 and / or a third valve 500 , the second valve 400 is disposed in the second pipeline 220 , the second valve 400 is located between the first valve 300 and the combustion device 30 , and the third valve 500 is disposed in the first pipeline 210 .

[0039] In this embodiment, the second pipeline 220 is provided with a second valve 400, and the second valve 400 is located between the first valve 300 and the combustion device 30. For example, the control device is connected to the second valve 400, and the control device can control the opening and closing of the second pipeline 220 by controlling the opening and closing states of the first valve 300 and the second valve 400, and further control whether the exhaust gas enters the combustion device 30, thereby improving the controllability of the second pipeline 220. In addition, dual control is implemented on the second pipeline 220, thereby improving the safety of the second pipeline 220.

[0040] A third valve 500 is provided on the first pipeline 210. Exemplarily, the control device is connected to the third valve 500. The control device can control the opening and closing state of the third valve 500 to control the on-off state of the first pipeline 210, thereby controlling whether the exhaust gas enters the heating device 20, thereby improving the controllability of the first pipeline 210.

[0041] In some embodiments provided in this application, Figure 1 As shown, optionally, the gas pipeline 200 further includes a fan, and the fan is used to blow the gas at the input end of the gas pipeline 200 to the output end of the gas pipeline 200 .

[0042] In this embodiment, the fan is arranged in the gas pipeline 200 and can blow the gas at the input end of the gas pipeline 200 to the output end of the gas pipeline 200, providing power for the gas in the gas pipeline 200. The fan blows the exhaust gas into the heating device 20 or the combustion device 30, shortening the exhaust gas emission time and improving the exhaust gas emission efficiency.

[0043] Exemplarily, the fan is connected to its own power supply and the factory power supply respectively.

[0044] In some embodiments provided in this application, Figure 1 As shown, optionally, the hydrogen extraction device 10 further includes a gas collecting bin, and the output end of the gas transmission pipeline 200 further includes a third output end, and the gas collecting bin is connected to the third output end.

[0045] In this embodiment, the output end of the gas transmission pipeline 200 also includes a third output end connected to the gas collection bin, and the tail gas enters the gas collection bin through the third output end. When the heating device 20 is in a non-operating state, the gas collection bin can accommodate the collected tail gas so that the tail gas can be used for other devices that require a heat source, or when the heating device 20 is in an operating state, the tail gas in the gas collection bin is input into the heating device 20. The flexibility and adaptability of using the tail gas are improved.

[0046] In a second aspect of the present application, an embodiment provides a synthetic ammonia device, such as Figure 1As shown, the synthetic ammonia device comprises: a combustion device 30, a heating device 20 and a hydrogen extraction device 10 provided by any one of the first embodiment of the present application. The combustion device 30 is connected to the second output end 221, and the heating device 20 comprises an air intake pipeline 21, which is connected to the first output end 211.

[0047] In this embodiment, the exhaust gas emitted by the hydrogen extraction device 10 enters the combustion device 30 through the second output port 221 and is completely burned in the combustion device 30. The exhaust gas enters the intake pipe 21 of the heating device 20 through the first output port 211. The burner of the heating device 20 is connected to the intake pipe, and the exhaust gas provides fuel for the burner.

[0048] It should be noted that the synthetic ammonia device includes the hydrogen extraction device 10 provided in any one of the above embodiments of the present application, and thus has all the beneficial technical effects of the above hydrogen extraction device 10. To avoid repetition, they are not described here.

[0049] In some embodiments provided in this application, Figure 1 As shown, optionally, the heating device 20 further includes a gas pipeline 22 , the gas pipeline 22 is connected to the air intake pipeline 21 , a fourth valve 23 is provided on the gas pipeline 22 , and the first output end 211 is located between the fourth valve 23 and the air intake pipeline 21 .

[0050] In this embodiment, the gas enters the intake pipeline 21 through the gas pipeline 22 to provide fuel for the heating device 20, the fourth valve 23 is used to control the on-off state of the gas pipeline 22, and the first output end 211 is located between the fourth valve 23 and the intake pipeline 21. When the tail gas of the hydrogen extraction device 10 is used as fuel alone, the fourth valve 23 is closed, and the tail gas output through the first output end 211 provides power for the heating device 20.

[0051] In some embodiments provided in this application, Figure 1 As shown, optionally, the heating device 20 further includes a flame arrester 24 , and the flame arrester 24 is disposed on the air intake line 21 .

[0052] In this embodiment, a flame arrester 24 is provided at the end of the air inlet pipe 21 . The flame arrester 24 is located in front of the burner of the heating device 20 . The flame arrester 24 is used to prevent the flame of the flammable gas from spreading to prevent backfire accidents and improve the safety of the heating device 20 .

[0053] Exemplarily, there may be multiple intake pipes 21 , and a flame arrester 24 is provided on any intake pipe 21 .

[0054] Exemplarily, the flame arrester 24 is composed of a flame arrester core and a flame arrester 24 shell.

[0055] In a specific embodiment, the hydrogen extraction device 10 adopts a double flushing regeneration PSA process, that is, one of the 10 adsorption towers in the device is always in a feed adsorption state. Its adsorption and regeneration process consists of adsorption, 5 consecutive equalizing pressure reduction, forward placement, reverse placement, flushing, 5 consecutive equalizing pressure increase and product final pressure increase.

[0056] The specific process is briefly described as follows:

[0057] 1. Adsorption process

[0058] Pure hydrogen (40°C, 2.62MPa.G) from outside enters the adsorption tower. Under high pressure, the impurities in it are adsorbed by a variety of adsorbents, and the unabsorbed H2 components are discharged from the top of the tower and enter the subsequent process after being buffered in the product gas buffer tank.

[0059] When the front of the mass transfer zone of the adsorbed impurities (called the adsorption front) reaches a certain position in the reserved section of the bed outlet, the raw gas feed valve and product gas outlet valve of the adsorption tower are closed to stop the adsorption. The adsorption bed begins to enter the regeneration process.

[0060] 2. Pressure equalization and pressure reduction process

[0061] This is the process of releasing the higher-pressure hydrogen in the tower into other lower-pressure adsorption towers that have completed regeneration along the adsorption direction after the adsorption process is completed. This process is not only a pressure reduction process, but also a process for recovering the product gas in the dead space of the bed. This process includes 5 consecutive equalization and pressure reduction processes, thus ensuring the full recovery of the product gas.

[0062] 3. Sequential release process

[0063] After the pressure equalization process is completed, the adsorption front has not yet reached the bed outlet. At this time, the pressure of the adsorption tower is first reduced to about 0.20Mpa (G) along the adsorption direction. At this time, the downstream gas enters the downstream gas buffer tank and is then regulated by the regulating valve as the flushing gas for the regeneration of the adsorption tower.

[0064] 4. Reverse process

[0065] After the forward release process is completed, the adsorption front has reached the bed outlet. At this time, the pressure of the adsorption tower is reduced to near normal pressure in the opposite direction of adsorption. At this time, the adsorbed impurities begin to be desorbed from the adsorbent in large quantities, and the desorbed gas is reversely released into the desorbed gas buffer tank.

[0066] 5. Flushing process

[0067] After the reverse release, in order to completely regenerate the adsorbent, the gas in the forward release tank is used to flush the adsorption bed in the opposite direction of the adsorption direction to further reduce the partial pressure of the impurity gas components and completely regenerate the adsorbent. The flushing desorbed gas is regulated by the regulating valve and then sent to the desorbed gas mixing tank.

[0068] 6. Voltage balancing and boosting process

[0069] After the flushing and regeneration process is completed, the adsorption tower is pressurized in turn with higher pressure product gas from other adsorption towers. This process corresponds to the pressure equalization and pressure reduction process. It is not only a pressure increase process, but also a process for recovering hydrogen in the dead space of the bed of other towers. This process includes four consecutive pressure equalization and pressure increase processes.

[0070] 7. Product gas pressure boosting process

[0071] After the five equalizing and boosting processes are completed, in order to allow the adsorption tower to smoothly switch to the next adsorption and ensure that the product purity does not fluctuate during this process, the pressure of the adsorption tower needs to be slowly and steadily increased to the adsorption pressure with product hydrogen through the boost regulating valve.

[0072] After this process, the adsorption tower completes a complete "adsorption-regeneration" cycle and is ready for the next adsorption.

[0073] The 10 adsorption towers alternately perform the above adsorption and regeneration operations to achieve continuous purification of the raw gas, and one of the adsorption towers is always in the adsorption state. When an adsorption tower fails, the control device can automatically switch to the 9th or 8th tower operation so that the failure can be repaired online without stopping the machine, which improves the reliability of the device.

[0074] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0076] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydrogen extraction device (10), characterized in that: include: The desorption component (100) is provided with an exhaust port, wherein the exhaust port is used to discharge the tail gas after desorption; A gas pipeline (200), wherein an input end of the gas pipeline (200) is connected to the exhaust port, and an output end of the gas pipeline (200) comprises a first output end (211) and a second output end (221), wherein the first output end (211) is used to communicate with the heating device (20), and the second output end (221) is used to communicate with the combustion device (30).

2. The hydrogen extraction device (10) according to claim 1, characterized in that: The gas transmission pipeline (200) comprises: A first pipeline (210), wherein an output end of the first pipeline (210) is the first output end (211); A second pipeline (220), wherein the output end of the second pipeline (220) is the second output end (221); A third pipeline (230), wherein the inlet end of the third pipeline (230) is the input end of the gas transmission pipeline (200), and the inlet ends of the first pipeline (210) and the second pipeline (220) are respectively connected to the outlet end of the third pipeline (230).

3. The hydrogen extraction device (10) according to claim 2, characterized in that: Also includes: The first valve (300) is arranged on the second pipeline (220).

4. The hydrogen extraction device (10) according to claim 3, characterized in that: The first valve (300) is a pressure valve, and a pressure collection point of the pressure valve is located in the third pipeline (230).

5. The hydrogen extraction device (10) according to claim 3, characterized in that: Also includes: a second valve (400) disposed in the second pipeline (220), wherein the second valve (400) is located between the first valve (300) and the combustion device (30); and / or The third valve (500) is arranged on the first pipeline (210).

6. The hydrogen extraction device (10) according to any one of claims 1 to 5, characterized in that: The gas transmission pipeline (200) further comprises: A fan, the fan being used to blow the gas at the input end of the gas pipeline (200) toward the output end of the gas pipeline (200).

7. The hydrogen extraction device (10) according to any one of claims 1 to 5, characterized in that: Also includes: A gas collecting bin, wherein the output end of the gas transmission pipeline (200) further comprises a third output end, and the gas collecting bin is connected to the third output end.

8. A synthetic ammonia device, characterized in that: include: A hydrogen extraction device (10) according to any one of claims 1 to 7; A combustion device (30) connected to the second output end (221); A heating device (20), the heating device (20) comprising an air intake pipeline (21), the air intake pipeline (21) being in communication with the first output end (211).

9. The ammonia synthesis device according to claim 8, characterized in that: The heating device (20) further comprises: A gas pipeline (22) is in communication with the air intake pipeline (21), a fourth valve (23) is provided on the gas pipeline (22), and the first output end (211) is located between the fourth valve (23) and the air intake pipeline (21).

10. The ammonia synthesis device according to claim 9, characterized in that: The heating device (20) further comprises: A flame arrester (24), wherein the flame arrester (24) is arranged on the air intake pipeline (21).

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