A solar photovoltaic photo-thermal coupled ammonia decomposition reactor

Abstract

The application relates to a solar photovoltaic light-heat coupled ammonia decomposition reactor, which comprises, in sequence, a solar photovoltaic panel, an inverter, an ammonia compression refrigeration circulation system, an ammonia decomposition reactor and a solar heat collector; the ammonia compression refrigeration circulation system comprises, in sequence, a first compressor, a condenser, an ammonia storage tank, an evaporator assembly and a heat exchanger assembly; the evaporator assembly comprises first and second evaporators which are arranged in parallel; and the heat exchanger assembly comprises first and second heat exchangers which are arranged in parallel. The application has the advantages of reasonable design, simple structure, convenient use, driving of the ammonia compression refrigeration circulation system and the ammonia decomposition reactor by electric energy and heat energy of the solar photovoltaic panel, improvement of energy utilization, reasonable power distribution of different small reactors by a pressure regulator of the ammonia decomposition reactor, and improvement of the reaction degree of ammonia decomposition.

Description

TECHNICAL FIELD

[0001] The application relates to a solar photovoltaic photothermal coupled ammonia decomposition reactor. BACKGROUND

[0002] With the rapid development of industrialization, environmental pollution problems are becoming increasingly serious, in order to solve this problem, the world is developing clean energy mainly based on hydrogen energy, but the use of hydrogen energy still has the problems of high storage cost and poor safety. Because of the high energy density, convenient storage and transportation, safety and environmental protection of liquid ammonia, ammonia is used as an efficient carrier of hydrogen, and combined with a fuel cell, which is a relatively safe and economical choice, and the ammonia decomposition reactor is an important part of the indirect ammonia hydrogen fuel cell system.

[0003] At present, the energy supply modes of the ammonia decomposition reactor include electric heating, flue gas combustion and solar energy, among which solar energy has the advantages of environmental protection and renewable energy, and the solar photovoltaic photothermal system can convert solar energy into electric energy and heat energy to supply energy for ammonia decomposition; however, the traditional solar photovoltaic photothermal system has unreasonable structure design and low energy utilization rate, and due to the limitation of the catalyst loading quality and heat supply in the ammonia decomposition reaction process, in the whole ammonia decomposition process, the front end of the ammonia decomposition reactor mainly plays a role in heating the raw material gas, the heat in the middle part of the ammonia decomposition reactor is mainly used for ammonia decomposition reaction, and due to the limitation of the reaction itself, the rear end of the ammonia decomposition reactor cannot be used even if a large amount of heat is provided, resulting in low ammonia decomposition conversion rate and low ammonia decomposition degree. SUMMARY

[0004] The application improves the above problems, that is, the technical problem to be solved by the application is to provide a solar photovoltaic photothermal coupled ammonia decomposition reactor, which improves the energy utilization rate by introducing a solar photovoltaic photothermal system, an evaporator assembly and a heat exchanger assembly; in addition, when the solar electric energy is insufficient, the pressure regulator of the ammonia decomposition reactor reasonably divides the power of different small reactors to improve the reaction degree of ammonia decomposition.

[0005] The application is constituted as follows, and comprises a solar photovoltaic panel, an inverter, an ammonia compression refrigeration cycle system, an ammonia decomposition reactor and a solar heat collector which are connected in sequence; the ammonia compression refrigeration cycle system comprises a first compressor, a condenser, an ammonia storage tank, an evaporator assembly and a heat exchanger assembly which are connected in sequence; the evaporator assembly comprises first and second evaporators which are connected in parallel; and the heat exchanger assembly comprises first and second heat exchangers which are connected in parallel.

[0006] Further, the first compressor is connected with the condenser through a first pipeline, the condenser is connected with the ammonia storage tank through a second pipeline, the ammonia storage tank is connected with the inlets A of the first evaporator and the second evaporator through a first branch pipeline and a second branch pipeline respectively, the outlets B of the first evaporator and the second evaporator are connected with the first compressor through a second pipeline, the outlets B of the first evaporator and the second evaporator are connected with the inlets A of the first heat exchanger and the inlets A of the second heat exchanger through a third pipeline, the outlets C of the first heat exchanger and the outlets C of the second heat exchanger are connected with the ammonia decomposition reactor through a fourth pipeline, the ammonia decomposition reactor is connected with the inlets B of the first heat exchanger and the inlets B of the second heat exchanger through a fifth pipeline, the outlet D of the first heat exchanger is connected with the inlet C of the second evaporator, the outlet D of the second evaporator is connected with the combustor, the combustor is connected with the user end, the outlet D of the second heat exchanger is connected with the second compressor, the compressor is connected with the user end, and the ammonia decomposition reactor is connected with the solar heat collector through a third branch pipeline and a fourth branch pipeline.

[0007] Further, the ammonia decomposition reactor comprises a plurality of reactor bodies arranged in series, the adjacent reactor bodies are connected through reaction pipelines, and the adjacent reaction pipelines are arranged in an up-down staggered manner, and a heating rod is arranged in each reactor body.

[0008] Further, a Ru-Al2O3 catalyst is filled in each reactor body.

[0009] Further, a cooling passage is arranged between the solar photovoltaic panel and the first evaporator, the first evaporator provides cold energy to the solar photovoltaic panel, and the inverter is connected with the first compressor, the second compressor and the ammonia decomposition reactor through a circuit to supply energy to the first compressor, the second compressor and the ammonia decomposition reactor.

[0010] Further, a first regulating valve is arranged on the first branch pipeline, and a second regulating valve is arranged on the second branch pipeline.

[0011] Further, a throttling valve is arranged between the ammonia storage tank and the evaporator assembly, a third regulating valve is arranged between the evaporator assembly and the first compressor, and a fourth regulating valve is arranged between the evaporator assembly and the heat exchanger assembly.

[0012] Further, a working method of a solar photovoltaic light heat coupled ammonia decomposition reactor includes the following steps: (1) the electric energy of the solar photovoltaic panel is converted by an inverter, part of the converted electric energy is heated to the ammonia decomposition reactor through a voltage regulator, and the other part of the electric energy drives the ammonia vapor of the first evaporator and the second evaporator to be adiabatic compressed into superheated ammonia vapor, then the superheated ammonia vapor enters a condenser to be condensed into saturated ammonia solution at constant pressure and heat release, and the ammonia solution enters an ammonia storage tank to realize recycling; (2) the liquid ammonia output from the ammonia storage tank enters a throttle valve, and then becomes wet ammonia vapor through adiabatic throttling and pressure reduction and temperature reduction, and is output from the first branch and the second branch; the wet ammonia vapor enters the first evaporator through the first regulating valve, and is gasified into saturated ammonia vapor through constant temperature and pressure heat absorption, and the generated cold energy is used to cool the solar photovoltaic panel to ensure the photovoltaic conversion efficiency; the second evaporator is used for processing ammonia decomposition products, the wet ammonia vapor from the second regulating valve enters the second evaporator from the inlet A of the second evaporator, cools the ammonia decomposition products from the first heat exchanger, the tail gas from the first heat exchanger enters the second evaporator from the inlet C of the second evaporator, the wet ammonia vapor is gasified into saturated vapor through constant temperature and pressure heat absorption of the evaporator, and the cooled ammonia decomposition products form tail gas which enters the burner from the outlet D of the second evaporator, the burner burns the tail gas of the second evaporator, and provides hot water to the user through the heat generated by the burning; (3) the first heat exchanger and the second heat exchanger are used for warming up the ammonia gas, the low-temperature ammonia gas from the regulating valve enters the first heat exchanger from the inlet A of the first heat exchanger, the high-temperature ammonia decomposition products enter the first heat exchanger from the inlet B of the first heat exchanger, the low-temperature ammonia gas is warmed up after heat exchange with the high-temperature ammonia decomposition products in the first heat exchanger, the warmed-up ammonia gas exits the first heat exchanger from the outlet C of the first heat exchanger and enters the ammonia decomposition reactor, and the cooled ammonia decomposition products exit the first heat exchanger from the outlet D of the first heat exchanger and enter the second evaporator; (4) the low-temperature ammonia gas from the regulating valve enters the second heat exchanger from the inlet A of the second heat exchanger, the high-temperature hydrogen gas enters the second heat exchanger from the inlet B of the second heat exchanger, the low-temperature ammonia gas is warmed up after heat exchange with the high-temperature hydrogen gas in the second heat exchanger, the warmed-up ammonia gas exits the second heat exchanger from the outlet C of the second heat exchanger and enters the ammonia decomposition reactor, and the cooled hydrogen gas exits the second heat exchanger from the outlet D of the second heat exchanger and enters the second compressor; (5) the ammonia gas from the first heat exchanger and the second heat exchanger enters the segmented ammonia decomposition reactor, and ammonia decomposition reaction is carried out under the action of the catalyst, and the heat required by the reaction is obtained from the heating of the heating rod of the ammonia decomposition reactor.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] (1) The solar photovoltaic and photothermal system provided by the present invention integrates solar photovoltaic panels and collectors, and uses the thermal and electrical energy of solar energy to drive the ammonia compression refrigeration cycle system and ammonia decomposition reactor, thereby greatly improving the utilization rate of solar energy;

[0015] (2) The segmented ammonia decomposition reactor of the present invention improves the conversion rate of ammonia decomposition by allocating reasonable power to different small reactors, and the overall heating is more uniform, reducing the temperature gradient. It achieves a high conversion rate with a low input power. At the same time, the ammonia decomposition reactor splits and bends the traditional single tube reactor into series, making the structure compact and the volume smaller.

[0016] (3) By adding evaporator components and heat exchanger components to preheat ammonia and cool tail gas, the present invention recovers the energy that could not be used at the back end of the reactor due to insufficient catalyst quantity, thereby improving energy utilization. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0018] In the diagram: 1-Solar photovoltaic panel, 2-Solar collector, 3-Ammonia decomposition reactor, 4-Inverter, 5-First compressor, 6-Condenser, 7-Ammonia storage tank, 8-Heating rod, 9-Pressure regulator, 10-Throttle valve, 11-First regulating valve, 12-First evaporator, 13-Third regulating valve, 14-Second regulating valve, 15-Second evaporator, 16-Fourth regulating valve, 17-First heat exchanger, 18-Burner, 19-Second heat exchanger, 20-Second compressor, 21-Reactor body, 22-Reaction pipeline, 23-First pipeline, 24-First branch, 25-Second branch, 26-Second pipeline, 27-Third pipeline, 28-Fourth pipeline, 29-Fifth pipeline, 30-Third branch, 31-Fourth branch, 32-Cooling passage. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Example: Refer to Appendix Figure 1 As shown, an ammonia decomposition reactor coupled with solar photovoltaic and photothermal energy is provided, comprising a solar photovoltaic panel 1, an inverter 4, an ammonia compression refrigeration cycle system, an ammonia decomposition reactor 3, and a solar collector 2 connected in sequence; the ammonia compression refrigeration cycle system comprises a first compressor 5, a condenser 6, an ammonia storage tank 7, an evaporator assembly, and a heat exchanger assembly connected in sequence; the evaporator assembly comprises a first evaporator 12 and a second evaporator 15 arranged in parallel; the heat exchanger assembly comprises a first heat exchanger 17 and a second heat exchanger 19 arranged in parallel.

[0021] The ammonia compression refrigeration cycle system and the ammonia decomposition reactor for hydrogen production share the ammonia gas source; the ammonia decomposition reactor is a segmented reactor, and the input ammonia gas needs to be heated by a heat exchanger assembly.

[0022] The first evaporator of the ammonia compression refrigeration cycle system provides cold energy for cooling the solar photovoltaic panel, and the second evaporator is used for cooling the ammonia decomposition product.

[0023] The cold energy provided by the first evaporator and the second evaporator can be adjusted by the first adjusting valve 11 and the second adjusting valve 14 respectively.

[0024] In the embodiment of the present application, the first compressor and the condenser are connected through a first pipeline 23, the condenser and the ammonia storage tank are connected through the first pipeline 23, the ammonia storage tank and the inlets A of the first evaporator and the second evaporator are connected through a first branch 24 and a second branch 25 respectively, the outlets B of the first evaporator and the second evaporator are connected through a second pipeline 26, the outlets B of the first evaporator and the second evaporator are connected through a third pipeline 27 to the inlets A of the first heat exchanger and the inlets A of the second heat exchanger, the outlets C of the first heat exchanger and the outlets C of the second heat exchanger are connected through a fourth pipeline 28 to the ammonia decomposition reactor, the ammonia decomposition reactor is connected through a fifth pipeline 29 to the inlets B of the first heat exchanger and the inlets B of the second heat exchanger, the outlet D of the first heat exchanger is connected to the inlet C of the second evaporator, the outlet D of the second evaporator is connected to a combustor 18, the combustor is connected to a user end, the outlet D of the second heat exchanger is connected to a second compressor 20, the compressor is connected to the user end, and the ammonia decomposition reactor is connected through a third branch 30 and a fourth branch 31 to a solar heat collector.

[0025] In the embodiment of the present application, the ammonia decomposition reactor comprises four reactor bodies 21 arranged in series, adjacent reactor bodies are connected through reaction pipelines 22, adjacent reaction pipelines are arranged in an up-down staggered manner, and a heating rod 8 is arranged inside each reactor body.

[0026] The four reactor bodies comprise a first-stage reactor, a second-stage reactor, a third-stage reactor and a fourth-stage reactor, the right upper side of the first-stage reactor serves as the ammonia gas inlet of the entire reactor, the first-stage reactor and the second-stage reactor are connected through a reaction pipeline at the lower part, the second-stage reactor and the third-stage reactor are connected through a reaction pipeline at the upper part, the third-stage reactor and the fourth-stage reactor are connected through a reaction pipeline at the lower part, and the right upper part of the fourth-stage reactor is provided with a product gas outlet.

[0027] The four reactor bodies are of the same size, the reaction pipelines connecting the reactor bodies are also of the same size, and the size of the reactor body is greater than that of the connecting pipeline.

[0028] The reactor body is sealed at the upper and lower ends, and fluid is transported through the openings on both sides. Each reactor body has a heating rod with the same specifications in the center, and the heating rod is slightly higher than the reactor height and is sleeved in the heating rod sleeve. The heating rod sleeve is fixed in each reactor body by welding.

[0029] The heating rod of the ammonia decomposition reactor is powered by the inverter 4. The heating rod 8 is connected to the voltage regulator 9, which adjusts the voltage to change the input voltage of the heating rod, change the heating power of the electric heating rod, and realize the function of different heating of the reactor in different sections.

[0030] When the power generated by the solar photovoltaic panel is insufficient, the power of the front small reactor is increased and the power of the rear small reactor is decreased through the voltage regulator, so as to convert as much ammonia as possible under the condition of limited power.

[0031] Each reactor body is filled with Ru-Al2O3 catalyst.

[0032] The lower end of the catalyst bed layer arranged in the reactor body and the connection between the inlet and outlet of the reactor body are respectively provided with a wire mesh for preventing catalyst leakage, and the mesh size of the wire mesh is 80-120 mesh.

[0033] In the embodiment of the application, a cooling passage 32 is provided between the solar photovoltaic panel and the first evaporator, the first evaporator provides cold energy to the solar photovoltaic panel, and the inverter is connected to the first compressor 5, the second compressor 20 and the ammonia decomposition reactor through a line to supply energy to the first compressor, the second compressor and the ammonia decomposition reactor.

[0034] In the embodiment of the application, a first adjusting valve 11 is arranged on the first branch, and a second adjusting valve 14 is arranged on the second branch.

[0035] In the embodiment of the application, a throttling valve 10 is arranged between the ammonia storage tank and the evaporator assembly; a third adjusting valve 13 is arranged between the evaporator assembly and the first compressor; and a fourth adjusting valve 16 is arranged between the evaporator assembly and the heat exchanger assembly.

[0036] In the embodiment of the present application, during operation: (1) the electric energy of the solar photovoltaic panel is converted by the inverter, part of the converted electric energy is used to heat the ammonia decomposition reactor through the voltage regulator, and the other part of the electric energy is used to drive the first evaporator and the second evaporator to adiabatically compress the ammonia vapor into superheated ammonia vapor, and then the superheated ammonia vapor enters the condenser to be condensed into saturated ammonia solution at constant pressure and heat release; (2) the liquid ammonia output from the ammonia storage tank enters the throttle valve, and then becomes wet ammonia vapor through adiabatic throttling and pressure reduction and temperature reduction, and is output from the first branch and the second branch; the wet ammonia vapor enters the first evaporator through the first regulating valve, and is gasified into saturated ammonia vapor through constant temperature and pressure heat absorption, and the cold energy generated is used to cool the solar photovoltaic panel to ensure the photovoltaic conversion efficiency; the second evaporator is used to process the ammonia decomposition products, the wet ammonia vapor from the second regulating valve enters the second evaporator from the inlet A of the second evaporator, cools the ammonia decomposition products from the first heat exchanger, the tail gas from the first heat exchanger enters the second evaporator from the inlet C of the second evaporator, the wet ammonia vapor is gasified into saturated vapor through constant temperature and pressure heat absorption of the evaporator, and the cooled ammonia decomposition products form the tail gas which enters the burner from the outlet D of the second evaporator, the burner burns the tail gas of the second evaporator and provides hot water to the user through the heat generated by the burning; (3) the first heat exchanger and the second heat exchanger are used to heat the ammonia gas, the low-temperature ammonia gas from the regulating valve enters the first heat exchanger from the inlet A of the first heat exchanger, the high-temperature ammonia decomposition products enter the first heat exchanger from the inlet B of the first heat exchanger, the low-temperature ammonia gas and the high-temperature ammonia decomposition products exchange heat in the first heat exchanger, the heated ammonia gas exits the first heat exchanger from the outlet C of the first heat exchanger and enters the ammonia decomposition reactor, and the cooled ammonia decomposition products exit the first heat exchanger from the outlet D of the first heat exchanger and enter the second evaporator; (4) the low-temperature ammonia gas from the regulating valve enters the second heat exchanger from the inlet A of the second heat exchanger, the high-temperature hydrogen gas enters the second heat exchanger from the inlet B of the second heat exchanger, the low-temperature ammonia gas and the high-temperature hydrogen gas exchange heat in the second heat exchanger, the heated ammonia gas exits the second heat exchanger from the outlet C of the second heat exchanger and enters the ammonia decomposition reactor, and the cooled hydrogen gas exits the second heat exchanger from the outlet D of the second heat exchanger and enters the second compressor; (5) the ammonia gas from the first heat exchanger and the second heat exchanger enters the segmented ammonia decomposition reactor, and ammonia decomposition reaction is carried out under the action of the catalyst, and the heat required for the reaction is obtained from the heating of the heating rod of the ammonia decomposition reactor.

[0037] Any of the technical solutions of the present application disclosed above, if not otherwise stated, if it discloses a numerical range, the numerical range disclosed is a preferred numerical range, any person skilled in the art should understand that the preferred numerical range is only one of the many implementable numerical values with more obvious technical effects or representative values. Because there are many values, it is impossible to enumerate, so the present application discloses some values to illustrate the technical solutions of the present application, and the above enumerated values should not constitute a limitation on the protection scope of the present application.

[0038] If the words "first", "second" and the like are used herein to limit parts, those skilled in the art should know that the use of "first", "second" is only for the convenience of describing the parts to be distinguished, and the above words have no special meaning unless otherwise stated.

[0039] Meanwhile, if the above-mentioned present application discloses or involves parts or structural members fixedly connected to each other, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, using bolt or screw connection), or as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, using casting process to make integral forming) (obviously, except for integral forming process).

[0040] In addition, the terms used to represent the position relationship or shape in any of the technical solutions disclosed above, unless otherwise stated, its meaning includes the approximate, similar or close state or shape.

[0041] Any of the components provided by the present application can be assembled from a plurality of individual components, or can be a single component manufactured by integral forming process.

[0042] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application and not to limit it; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. A solar coupled photovoltaic photo-thermal ammonia decomposition reactor, characterized in that, The system comprises a solar photovoltaic panel, an inverter, an ammonia compression refrigeration cycle system, an ammonia decomposition reactor and a solar heat collector connected in sequence; the ammonia compression refrigeration cycle system comprises a first compressor, a condenser, an ammonia storage tank, an evaporator assembly and a heat exchanger assembly connected in sequence; the evaporator assembly comprises a first evaporator and a second evaporator connected in parallel; the heat exchanger assembly comprises a first heat exchanger and a second heat exchanger connected in parallel; The first compressor is connected with the condenser through a first pipeline, the condenser is connected with the ammonia storage tank through a second pipeline, the ammonia storage tank is connected with the inlets A of the first evaporator and the second evaporator through a first branch and a second branch respectively, the outlets B of the first evaporator and the second evaporator are connected with the first compressor through a second pipeline, the outlets B of the first evaporator and the second evaporator are connected with the inlets A of the first heat exchanger and the inlets A of the second heat exchanger through a third pipeline, the outlets C of the first heat exchanger and the outlets C of the second heat exchanger are connected with the ammonia decomposition reactor through a fourth pipeline, the ammonia decomposition reactor is connected with the inlets B of the first heat exchanger and the inlets B of the second heat exchanger through a fifth pipeline, the outlet D of the first heat exchanger is connected with the inlet C of the second evaporator, the outlet D of the second evaporator is connected with a combustor, the combustor is connected with a user end, the outlet D of the second heat exchanger is connected with a second compressor, the compressor is connected with the user end, and the ammonia decomposition reactor is connected with the solar heat collector through a third branch and a fourth branch; The ammonia decomposition reactor comprises a plurality of reactor bodies connected in series, adjacent reactor bodies are connected through reaction pipelines, and adjacent reaction pipelines are arranged in an up-down staggered manner, and a heating rod is arranged in each reactor body; Each reactor body is filled with a Ru-Al2O3 catalyst; A cooling passage is arranged between the solar photovoltaic panel and the first evaporator, the first evaporator provides cold energy to the solar photovoltaic panel, and the inverter is connected with the first compressor, the second compressor and the ammonia decomposition reactor through a line to supply energy to the first compressor, the second compressor and the ammonia decomposition reactor; A first adjusting valve is arranged on the first branch, and a second adjusting valve is arranged on the second branch; A throttling valve is arranged between the ammonia storage tank and the evaporator assembly, a third adjusting valve is arranged between the evaporator assembly and the first compressor, and a fourth adjusting valve is arranged between the evaporator assembly and the heat exchanger assembly.

2. A method of operating the coupled solar PV and photo-thermal ammonia decomposition reactor of claim 1, wherein, The method comprises the following steps: (1) the electric energy of the solar photovoltaic panel is converted by an inverter, part of the converted electric energy is used to heat the ammonia decomposition reactor by a voltage regulator, and the other part of the converted electric energy is used to drive the first evaporator and the second evaporator to adiabatically compress ammonia steam into superheated ammonia steam, and then the superheated ammonia steam enters the condenser to be condensed into saturated ammonia solution at constant pressure and heat release; (2) the liquid ammonia output by the ammonia storage tank enters the throttle valve, and then becomes wet ammonia steam through adiabatic throttling and pressure reduction and temperature reduction, and is output from the first branch and the second branch; the wet ammonia steam enters the first evaporator through the first regulating valve, and is gasified into saturated ammonia steam through constant temperature and pressure heat absorption, and the cold energy generated is used to cool the solar photovoltaic panel to ensure the photovoltaic conversion efficiency; the second evaporator is used to process ammonia decomposition products, the wet ammonia steam from the second regulating valve enters the second evaporator from the inlet A of the second evaporator, cools the ammonia decomposition products from the first heat exchanger, the tail gas from the first heat exchanger enters the second evaporator from the inlet C of the second evaporator, the wet ammonia steam is gasified into saturated steam through constant temperature and pressure heat absorption of the evaporator, and the cooled ammonia decomposition products form tail gas which enters the burner from the outlet D of the second evaporator, the burner burns the tail gas of the second evaporator, and provides hot water to the user through the heat generated by the burning; (3) the first heat exchanger and the second heat exchanger are used to heat the ammonia gas, the low-temperature ammonia gas from the regulating valve enters the first heat exchanger from the inlet A of the first heat exchanger, the high-temperature ammonia decomposition products enter the first heat exchanger from the inlet B of the first heat exchanger, the low-temperature ammonia gas and the high-temperature ammonia decomposition products exchange heat in the first heat exchanger, the heated ammonia gas exits the first heat exchanger from the outlet C of the first heat exchanger and enters the ammonia decomposition reactor, and the cooled ammonia decomposition products exit the first heat exchanger from the outlet D of the first heat exchanger and enter the second evaporator; (4) the low-temperature ammonia gas from the regulating valve enters the second heat exchanger from the inlet A of the second heat exchanger, the high-temperature hydrogen gas enters the second heat exchanger from the inlet B of the second heat exchanger, the low-temperature ammonia gas and the high-temperature hydrogen gas exchange heat in the second heat exchanger, the heated ammonia gas exits the second heat exchanger from the outlet C of the second heat exchanger and enters the ammonia decomposition reactor, and the cooled hydrogen gas exits the second heat exchanger from the outlet D of the second heat exchanger and enters the second compressor; (5) the ammonia gas from the first heat exchanger and the second heat exchanger enters the segmented ammonia decomposition reactor, and ammonia decomposition reaction is carried out under the action of the catalyst, and the heat required for the reaction is obtained from the heating of the heating rod of the ammonia decomposition reactor. ​

Images