System for producing and storing hydrogen and synthesizing ammonia

Abstract

The hydrogen production and storage synthetic ammonia system comprises a synthetic ammonia device used for synthesizing mixed gas containing nitrogen and hydrogen into crude synthetic gas containing ammonia; a crude ammonia separation and purification device; a hydrogen production device; an air separation device; the renewable energy power generation device is used for supplying power to the hydrogen production device and the air separation device; the solid hydrogen storage device is used for storing hydrogen, an inlet of the solid hydrogen storage device is communicated with a hydrogen outlet of the hydrogen production device, and an outlet of the solid hydrogen storage device is communicated with an inlet of the ammonia synthesis device; a hot fluid inlet of the first heat exchanger is communicated with an outlet of the ammonia synthesis device, and a cold fluid outlet of the first heat exchanger is communicated with a hot fluid inlet of the solid hydrogen storage device. Therefore, the hydrogen production and storage synthetic ammonia system has the advantages that energy can be saved, and stable operation of the synthetic ammonia device is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen production and ammonia synthesis, and in particular to a hydrogen production and storage and ammonia synthesis system. Background Art

[0002] Ammonia is an important chemical raw material widely used in agriculture and industry. In agriculture, ammonia is one of the main raw materials for fertilizers, and hydrogen is its key synthetic raw material. The use of fossil energy such as coal and natural gas to produce hydrogen and synthesize ammonia under traditional chemical processes will cause large amounts of greenhouse gas emissions and pollute the environment. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a hydrogen production, storage and ammonia synthesis system.

[0004] The hydrogen production and storage ammonia synthesis system of the embodiment of the present invention comprises:

[0005] An ammonia synthesis device, wherein the ammonia synthesis device is used to synthesize ammonia-containing raw synthesis gas from a mixed gas containing nitrogen and hydrogen;

[0006] a crude ammonia separation and purification device, the inlet of which is connected to the outlet of the synthetic ammonia device, and the crude ammonia separation and purification device is used to purify ammonia from the ammonia-containing crude synthesis gas;

[0007] A hydrogen production device, the hydrogen production device is used to electrolyze pure water to produce hydrogen and oxygen, and the hydrogen outlet of the hydrogen production device is connected to the inlet of the synthetic ammonia device;

[0008] An air separation device, the air separation device is used to separate oxygen and nitrogen from the air, and the nitrogen outlet of the air separation device is connected to the inlet of the synthetic ammonia device;

[0009] A renewable energy power generation device, wherein the renewable energy power generation device is used to supply power to the hydrogen production device and the air separation device;

[0010] A solid-state hydrogen storage device, the solid-state hydrogen storage device is used to store hydrogen, the inlet of the solid-state hydrogen storage device is connected to the hydrogen outlet of the hydrogen production device, and the outlet of the solid-state hydrogen storage device is connected to the inlet of the synthetic ammonia device;

[0011] The first heat exchanger, the hot fluid inlet of the first heat exchanger is connected to the outlet of the synthetic ammonia device, the hot fluid outlet of the first heat exchanger is connected to the inlet of the crude ammonia separation and purification device, the cold fluid outlet of the first heat exchanger is connected to the hot fluid inlet of the solid-state hydrogen storage device, and the cold fluid inlet of the first heat exchanger is connected to the hot fluid outlet of the solid-state hydrogen storage device.

[0012] Therefore, the hydrogen production and storage ammonia synthesis system according to the embodiment of the present invention has the advantages of saving energy and facilitating the stable operation of the ammonia synthesis device.

[0013] In some embodiments, the ammonia synthesis device is connected to the crude ammonia separation and purification device through a first delivery pipeline and a second delivery pipeline arranged in parallel, the first heat exchanger is connected to the first delivery pipeline so that the ammonia-containing crude synthesis gas in the first delivery pipeline serves as the hot fluid of the first heat exchanger, and coolers are provided on the first delivery pipeline and the second delivery pipeline, and the cooler on the first delivery pipeline is located between the first heat exchanger and the outlet of the first delivery pipeline.

[0014] In some embodiments, the synthetic ammonia device comprises a first bed layer, a first pipeline, a second bed layer, a second pipeline and a third bed layer which are connected in sequence, and the outlet of the third bed layer is connected to the first delivery pipeline and the second delivery pipeline;

[0015] The hydrogen outlet of the hydrogen production device and the nitrogen outlet of the air separation device are connected to the inlet of the compressor, and the outlet of the compressor is connected to the inlet of the first bed through a third pipeline;

[0016] The first pipeline and the second pipeline are both provided with a cooler, and the first pipeline and the third pipeline exchange heat through a second heat exchanger.

[0017] In some embodiments, the compressor is provided with a first water cooler, the cooler on the first pipeline is a second water cooler, the cooler on the second pipeline is a third water cooler, the cooler on the second delivery pipeline is a fourth water cooler, and the cooler on the first delivery pipeline is a fifth water cooler;

[0018] The synthetic ammonia device includes a waste heat recovery device, and the fluid after absorbing heat in the first water cooler, the second water cooler, the third water cooler, the fourth water cooler and the fifth water cooler can be passed into the waste heat recovery device so that the waste heat recovery device can absorb thermal energy.

[0019] In some embodiments, the cold fluid outlet of the first heat exchanger, the hot fluid storage tank, the fourth pipeline and the hot fluid inlet of the solid-state hydrogen storage device are connected in sequence, and the cold fluid inlet of the first heat exchanger, the cold fluid storage tank and the hot fluid outlet of the solid-state hydrogen storage device are connected in sequence, and a thermal oil flow regulating valve is provided on the fourth pipeline.

[0020] In some embodiments, both the first delivery pipeline and the second delivery pipeline are provided with flow regulating valves.

[0021] In some embodiments, the hydrogen outlet of the hydrogen production device, the fifth pipeline, the compressor and the hydrogen inlet of the solid hydrogen storage device are connected in sequence, and the fifth pipeline is provided with a first flow regulating valve;

[0022] The hydrogen outlet of the solid-state hydrogen storage device is connected to the inlet of the compressor through a sixth pipeline, and a second flow regulating valve is provided on the sixth pipeline.

[0023] The hydrogen production and storage ammonia synthesis system of an embodiment of the present invention includes a backup power supply, which includes a battery and a power generation device. The battery is used to store the electric energy generated by the renewable energy power generation device, the battery is used to supply power to the hydrogen production device and the air separation device, and the power generation device can be used to supply power to the air separation device.

[0024] In some embodiments, the power generation device can be used to supply power to the hydrogen production device;

[0025] The power generation device includes at least one of a diesel generator, a hydrogen fuel cell and an ammonia fuel cell;

[0026] The renewable energy power generation device includes at least one of a wind generator and a solar generator.

[0027] In some embodiments, the oxygen outlet of the hydrogen production device and the oxygen outlet of the air separation device are connected to the inlet of the oxygen storage tank;

[0028] The outlet of the crude ammonia separation and purification device is communicated with an ammonia storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of a system for producing, storing and synthesizing ammonia by hydrogen according to an embodiment of the present invention.

[0030] Reference numerals:

[0031] 1. Renewable energy power generation device; 2. Backup power supply; 3. Hydrogen production device; 4. Solid hydrogen storage device; 5. Air separation device; 6. Oxygen storage tank; 7. Waste heat recovery device; 8. Synthetic ammonia device, 801, first bed layer; 802, second bed layer; 803, third bed layer; 9. Crude ammonia separation and purification device; 10. Ammonia storage tank; 11. Hot fluid storage tank; 12. Cold fluid storage tank; 13. First heat exchanger; 14. Air compressor; 15. Compressor;

[0032] 101, a first flow regulating valve; 102, a second flow regulating valve; 103, a heat transfer oil flow regulating valve;

[0033] 201, second heat exchanger; 202, second water cooler; 203, third water cooler; 204, fourth water cooler; 205, fifth water cooler;

[0034] 301, first pipeline; 302, second pipeline; 303, third pipeline; 304, fourth pipeline; 305, fifth pipeline; 306, sixth pipeline;

[0035] 41. A first delivery pipeline; 42. A second delivery pipeline. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] The following describes the hydrogen production and storage ammonia synthesis system according to an embodiment of the present invention with reference to the accompanying drawings. Figure 1 As shown, the hydrogen production and storage ammonia synthesis system according to an embodiment of the present invention includes an ammonia synthesis device 8, a crude ammonia separation and purification device 9, a hydrogen production device 3, an air separation device 5, a renewable energy power generation device 1, a solid hydrogen storage device 4 and a first heat exchanger 13.

[0038] The ammonia synthesis device 8 is used to synthesize ammonia-containing crude synthesis gas from a mixed gas containing nitrogen and hydrogen. The inlet of the crude ammonia separation and purification device 9 is connected to the outlet of the ammonia synthesis device 8, and the crude ammonia separation and purification device 9 is used to purify ammonia from the ammonia-containing crude synthesis gas.

[0039] The hydrogen production device 3 is used to electrolyze pure water to produce hydrogen and oxygen, and the hydrogen outlet of the hydrogen production device 3 is connected to the inlet of the synthetic ammonia device 8. The air separation device 5 is used to separate oxygen and nitrogen from the air, and the nitrogen outlet of the air separation device 5 is connected to the inlet of the synthetic ammonia device 8.

[0040] The renewable energy power generation device 1 is used to supply power to the hydrogen production device 3 and the air separation device 5. The solid hydrogen storage device 4 is used to store hydrogen, the inlet of the solid hydrogen storage device 4 is connected to the hydrogen outlet of the hydrogen production device 3, and the outlet of the solid hydrogen storage device 4 is connected to the inlet of the synthetic ammonia device 8.

[0041] The hot fluid inlet of the first heat exchanger 13 is connected to the outlet of the synthetic ammonia device 8, the hot fluid outlet of the first heat exchanger 13 is connected to the inlet of the crude ammonia separation and purification device 9, the cold fluid outlet of the first heat exchanger 13 is connected to the hot fluid inlet of the solid-state hydrogen storage device 4, and the cold fluid inlet of the first heat exchanger 13 is connected to the hot fluid outlet of the solid-state hydrogen storage device 4.

[0042] The renewable energy power generation device 1 of the hydrogen production, storage and synthesis ammonia system according to the embodiment of the present invention can generate electricity using renewable energy (solar energy, wind power, etc.), and the power generation of the renewable energy power generation device 1 can drive the operation of the hydrogen production device 3 and the air separation device 5, so that the hydrogen and nitrogen produced by the hydrogen production device 3 and the air separation device 5 can be introduced into the synthesis ammonia device 8. The crude synthesis gas containing ammonia produced by the synthesis ammonia device 8 can be introduced into the crude ammonia separation and purification device to purify ammonia.

[0043] When the power generation of the renewable energy power generation device 1 is high, the hydrogen produced by the hydrogen production device 3 can be passed into the solid hydrogen storage device 4 for storage; when the power generation of the renewable energy power generation device 1 is low, the air separation device 5 can be powered first. And the temperature of the crude synthesis gas containing ammonia discharged from the outlet of the synthetic ammonia device 8 is relatively high, and it is necessary to cool down when purifying the crude synthesis gas containing ammonia. The first heat exchanger 13 can absorb the heat of the crude synthesis gas containing ammonia discharged from the outlet of the synthetic ammonia device 8, and then pass it into the crude ammonia separation and purification device 9 for purification. The heat absorbed by the first heat exchanger 13 can be used to heat the hot fluid passed into the solid hydrogen storage device 4, so that the hydrogen in the solid hydrogen storage device 4 is discharged and passed into the synthetic ammonia device 8 to provide hydrogen for synthetic ammonia. Therefore, when there is a surplus of renewable energy, the electric energy is converted into hydrogen storage through the hydrogen production device 3, and when there is a shortage of renewable energy, the stored hydrogen is released, which can effectively smooth the fluctuation of renewable energy and realize the stable operation of the synthetic ammonia device.

[0044] Therefore, the hydrogen production and storage ammonia synthesis system according to the embodiment of the present invention has the advantages of saving energy and facilitating the stable operation of the ammonia synthesis device.

[0045] like Figure 1 As shown, the hydrogen production and storage ammonia synthesis system according to an embodiment of the present invention includes a backup power supply 2, which includes a battery and a power generation device. The battery is used to store the electric energy generated by the renewable energy power generation device 1, and the battery is used to power the hydrogen production device 3 and the air separation device 5. The power generation device can be used to power the air separation device 5, and the power generation device can be used to power the hydrogen production device 3. Therefore, when the power generation of the renewable energy power generation device 1 is low, the backup power supply 2 can increase the electric energy.

[0046] In some embodiments, the power generation device includes at least one of a diesel generator, a hydrogen fuel cell, and an ammonia fuel cell. For example, the power generation device is a diesel generator.

[0047] In some embodiments, the renewable energy power generation device 1 includes at least one of a wind turbine and a solar power generator. For example, the renewable energy power generation device 1 includes a wind turbine and a solar power generator.

[0048] In some embodiments, the oxygen outlet of the hydrogen production device 3 and the oxygen outlet of the air separation device 5 are connected to the inlet of the oxygen storage tank 6 to store the generated oxygen.

[0049] In some embodiments, the outlet of the crude ammonia separation and purification device 9 is connected to the ammonia storage tank 10 to store the generated ammonia.

[0050] like Figure 1 As shown, in some embodiments, the synthetic ammonia device 8 is connected to the crude ammonia separation and purification device 9 through a first delivery pipeline 41 and a second delivery pipeline 42 arranged in parallel. The first heat exchanger 13 is connected to the first delivery pipeline 41 so that the ammonia-containing crude synthesis gas in the first delivery pipeline 41 is used as the hot fluid of the first heat exchanger 13. The first delivery pipeline 41 and the second delivery pipeline 42 are both provided with a cooler, and the cooler on the first delivery pipeline 41 is located between the first heat exchanger 13 and the outlet of the first delivery pipeline 41. Specifically, the first delivery pipeline 41 and the second delivery pipeline 42 are both provided with a flow regulating valve, and the flow rates of the first delivery pipeline 41 and the second delivery pipeline 42 can be adjusted respectively by the flow regulating valves on the first delivery pipeline 41 and the second delivery pipeline 42, so that the heat of the ammonia-containing crude synthesis gas delivered by the first delivery pipeline 41 meets the needs of the first heat exchanger 13. When the first heat exchanger 13 does not need to exchange heat or the demand is small, the flow rate of the ammonia-containing crude synthesis gas delivered by the first delivery pipeline 41 can be reduced.

[0051] like Figure 1 As shown, in some embodiments, the cold fluid outlet of the first heat exchanger 13, the hot fluid storage tank 11, the fourth pipeline 304 and the hot fluid inlet of the solid-state hydrogen storage device 4 are connected in sequence, the cold fluid inlet of the first heat exchanger 13, the cold fluid storage tank 12 and the hot fluid outlet of the solid-state hydrogen storage device 4 are connected in sequence, and a heat transfer oil flow regulating valve is provided on the fourth pipeline 304. Specifically, the hot fluid of the solid-state hydrogen storage device 4 is heat transfer oil, and the heat transfer oil discharged from the hot fluid outlet of the solid-state hydrogen storage device 4 can be passed into the cold fluid storage tank 12, and the heat transfer oil in the cold fluid storage tank 12 can be passed into the cold fluid inlet (cold fluid cavity) of the first heat exchanger 13. The ammonia-containing raw synthesis gas in the hot fluid cavity of the first heat exchanger 13 can heat the heat transfer oil in the cold fluid cavity of the first heat exchanger 13. Thus, when the ammonia-containing crude synthesis gas discharged from the ammonia synthesis device 8 is passed into the first transmission pipeline 41, the ammonia-containing crude synthesis gas with higher heat can be passed into the hot fluid cavity of the first heat exchanger 13, and the ammonia-containing crude synthesis gas in the hot fluid cavity of the first heat exchanger 13 can heat the heat transfer oil in the cold fluid cavity of the first heat exchanger 13. The heated heat transfer oil can be passed into the hot fluid storage tank 11, and when the solid hydrogen storage device 4 needs to release hydrogen, the heat transfer oil with higher temperature in the hot fluid storage tank 11 can be passed into the solid hydrogen storage device 4, so that the solid hydrogen storage device 4 releases hydrogen.

[0052] like Figure 1 As shown, in some embodiments, the synthetic ammonia device 8 includes a first bed 801, a first pipeline 301, a second bed 802, a second pipeline 302 and a third bed 803 which are connected in sequence, and the outlet of the third bed 803 is connected to the first delivery pipeline 41 and the second delivery pipeline 42. The hydrogen outlet of the hydrogen production device 3 and the nitrogen outlet of the air separation device 5 are connected to the inlet of the compressor 15, and the outlet of the (multi-stage) compressor 15 is connected to the inlet of the first bed 801 through the third pipeline 303, and the first pipeline 301 and the third pipeline 303 are heat exchanged through the second heat exchanger 201. For example, the hydrogen produced by the hydrogen production device 3 and the nitrogen produced by the air separation device 5 are mixed in a molar ratio of 3:1 and then passed into the multi-stage compressor 15 for pressurization.

[0053] The first pipeline 301 and the second pipeline 302 are both provided with a cooler. Specifically, the compressor 15 is provided with a first water cooler, the cooler on the first pipeline 301 is the second water cooler 202, the cooler on the second pipeline 302 is the third water cooler 203, the cooler on the second delivery pipeline 42 is the fourth water cooler 204, and the cooler on the first delivery pipeline 41 is the fifth water cooler 204. Thus, the first water cooler can cool the compressor 15, and the mixture of hydrogen and nitrogen in the third pipeline 303 can be heated by the second heat exchanger 201, and then passed into the first bed 801 to synthesize ammonia. The ammonia-containing synthesis gas discharged from the first bed 801 is passed into the first pipeline 301 and is cooled down by the second heat exchanger 201 and the second water cooler 202 in turn, and then passed into the second bed 802 again. The ammonia-containing gas discharged from the second bed 802 can be cooled by the third water cooler 203, and then passed into the third bed 803 and ammonia again.

[0054] The synthetic ammonia device 8 includes a waste heat recovery device 7, and the fluid after absorbing heat from the first water cooler, the second water cooler 202, the third water cooler 203, the fourth water cooler 204 and the fifth water cooler 205 can be passed into the waste heat recovery device 7 so that the waste heat recovery device 7 can absorb thermal energy. Specifically, the cold fluid discharged from the waste heat recovery device 7 can be passed into the first water cooler, the second water cooler 202, the third water cooler 203, the fourth water cooler 204 and the fifth water cooler 205, and the hot fluid discharged from the first water cooler, the second water cooler 202, the third water cooler 203, the fourth water cooler 204 and the fifth water cooler 205 can be passed into the waste heat recovery device 7. Thus, the waste heat recovery device 7 and the first water cooler, the second water cooler 202, the third water cooler 203, the fourth water cooler 204 and the fifth water cooler 205 can cool the gas generated by the synthetic ammonia device 8 and absorb heat energy for recovery and utilization.

[0055] like Figure 1As shown, in some embodiments, the hydrogen outlet of the hydrogen production device 3, the fifth pipeline 305, the compressor 14 and the hydrogen inlet of the solid hydrogen storage device 4 are connected in sequence, and the fifth pipeline 305 is provided with a first flow regulating valve 101. The hydrogen outlet of the solid hydrogen storage device 4 is connected to the inlet of the compressor 15 through the sixth pipeline 306, and the sixth pipeline 306 is provided with a second flow regulating valve 102. The first flow regulating valve 101 can adjust the flow of the fifth pipeline 305, and the second flow regulating valve 102 can adjust the flow of the sixth pipeline 306. The compressor 14 can increase the gas pressure entering the solid hydrogen storage device 4 to achieve hydrogen storage.

[0056] The temperature of the synthesis gas at the outlet of the synthetic ammonia device 8 is 400°C to 500°C, so the heat of part of the synthesis gas is absorbed by the heat transfer oil and stored in the thermal fluid storage tank 11 to ensure that the solid hydrogen storage device 4 works at a suitable temperature, and the heat of the remaining synthesis gas and the heat of the multi-stage compressor 15 are recovered by the waste heat recovery device 7. When the power generated by the renewable energy power generation device 1 is insufficient, the backup power supply 2 provides the electric energy required for the operation of the air separation device 5 to ensure that the nitrogen is continuously and stably input into the synthetic ammonia device 8; and the high-temperature heat transfer oil in the thermal fluid storage tank 11 is used for the thermal management of the solid hydrogen storage device 4 to ensure that the hydrogen is continuously and stably input into the synthetic ammonia device 8, so as to achieve the stable operation of the synthetic ammonia system.

[0057] In some embodiments, the hydrogen production device 3 includes at least one of the following: an alkaline electrolyzer, a solid oxide electrolyzer, a proton exchange membrane electrolyzer, and an anion exchange membrane electrolyzer.

[0058] In some embodiments, the air separation device 5 is used to separate nitrogen and oxygen from the air, and the separation method uses at least one of the following: cryogenic air separation method, molecular sieve air separation method, membrane separation method, and pressure swing adsorption method.

[0059] In some embodiments, the solid-state hydrogen storage device 4 may be made of magnesium-based materials. This reaction is a typical gas-solid reaction. The hydrogen absorption reaction and the dehydrogenation reaction are reciprocal. The hydrogen absorption temperature is 245°C, and the hydrogen release temperature is about 300°C to 400°C. The hydrogen release temperature matches the crude synthesis gas temperature (400°C to 450°C) at the outlet of the synthetic ammonia unit 8.

[0060] When the renewable energy power generation device 1 generates sufficient electricity, the electricity generated by the renewable energy power generation device 1 is preferentially supplied to the hydrogen production device 3 and the air separation device 5, and the excess electricity is stored in the battery of the backup power supply 2. The hydrogen production device 3 works at full load, and the hydrogen produced is supplied to the synthetic ammonia device 8. The excess hydrogen is pressurized by the compressor 14 after opening the first flow regulating valve 101 and stored in the solid hydrogen storage device 4. The oxygen produced by the hydrogen production device 3 is stored in the oxygen storage tank 6. The hydrogen produced by the hydrogen production device 3 and the nitrogen produced by the air separation device 5 are mixed in a molar ratio of 3:1, and then passed into the multi-stage compressor 15 for pressurization, and the pressurized mixed gas is passed into the synthetic ammonia device 8.

[0061] When insufficient renewable energy resources lead to power shortage, the backup power supply 2 is started to provide the electric energy required for the operation of the air separation device 5, the thermal oil flow regulating valve 103 is opened, and the thermal oil in the hot fluid storage tank 11 is used to provide the heat required for the solid hydrogen storage device 4 to release hydrogen, and the second flow regulating valve 102 is opened to ensure that nitrogen and hydrogen are continuously and stably input into the synthetic ammonia device 8, so that the synthetic ammonia system can operate stably.

[0062] The present invention is coupled with a solid-state hydrogen storage unit. When renewable energy is in excess, electrical energy is converted into hydrogen for storage through a hydrogen production device. When renewable energy is insufficient, the stored hydrogen is released, thereby effectively utilizing waste heat in the ammonia synthesis process, improving the energy utilization efficiency of the system, and effectively smoothing out fluctuations in renewable energy to achieve stable operation of the ammonia synthesis device.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A hydrogen production and storage ammonia synthesis system, characterized in that: include: An ammonia synthesis device, wherein the ammonia synthesis device is used to synthesize ammonia-containing raw synthesis gas from a mixed gas containing nitrogen and hydrogen; a crude ammonia separation and purification device, the inlet of which is connected to the outlet of the synthetic ammonia device, and the crude ammonia separation and purification device is used to purify ammonia from the ammonia-containing crude synthesis gas; A hydrogen production device, the hydrogen production device is used to electrolyze pure water to produce hydrogen and oxygen, and the hydrogen outlet of the hydrogen production device is connected to the inlet of the synthetic ammonia device; An air separation device, the air separation device is used to separate oxygen and nitrogen from the air, and the nitrogen outlet of the air separation device is connected to the inlet of the synthetic ammonia device; A renewable energy power generation device, wherein the renewable energy power generation device is used to supply power to the hydrogen production device and the air separation device; A solid-state hydrogen storage device, the solid-state hydrogen storage device is used to store hydrogen, the inlet of the solid-state hydrogen storage device is connected to the hydrogen outlet of the hydrogen production device, and the outlet of the solid-state hydrogen storage device is connected to the inlet of the synthetic ammonia device; The first heat exchanger, the hot fluid inlet of the first heat exchanger is connected to the outlet of the synthetic ammonia device, the hot fluid outlet of the first heat exchanger is connected to the inlet of the crude ammonia separation and purification device, the cold fluid outlet of the first heat exchanger is connected to the hot fluid inlet of the solid-state hydrogen storage device, and the cold fluid inlet of the first heat exchanger is connected to the hot fluid outlet of the solid-state hydrogen storage device.

2. The hydrogen production and storage ammonia synthesis system according to claim 1, characterized in that: The ammonia synthesis device is connected to the crude ammonia separation and purification device through a first delivery pipeline and a second delivery pipeline arranged in parallel. The first heat exchanger is connected to the first delivery pipeline so that the ammonia-containing crude synthesis gas in the first delivery pipeline serves as the hot fluid of the first heat exchanger. Coolers are provided on the first delivery pipeline and the second delivery pipeline. The cooler on the first delivery pipeline is located between the first heat exchanger and the outlet of the first delivery pipeline.

3. The hydrogen production and storage ammonia synthesis system according to claim 2, characterized in that: The synthetic ammonia device comprises a first bed layer, a first pipeline, a second bed layer, a second pipeline and a third bed layer which are connected in sequence, and the outlet of the third bed layer is connected with the first delivery pipeline and the second delivery pipeline; The hydrogen outlet of the hydrogen production device and the nitrogen outlet of the air separation device are connected to the inlet of the compressor, and the outlet of the compressor is connected to the inlet of the first bed through a third pipeline; The first pipeline and the second pipeline are both provided with a cooler, and the first pipeline and the third pipeline exchange heat through a second heat exchanger.

4. The hydrogen production and storage ammonia synthesis system according to claim 3, characterized in that: The compressor is provided with a first water cooler, the cooler on the first pipeline is a second water cooler, the cooler on the second pipeline is a third water cooler, the cooler on the second delivery pipeline is a fourth water cooler, and the cooler on the first delivery pipeline is a fifth water cooler; The synthetic ammonia device includes a waste heat recovery device, and the fluid after absorbing heat in the first water cooler, the second water cooler, the third water cooler, the fourth water cooler and the fifth water cooler can be passed into the waste heat recovery device so that the waste heat recovery device can absorb thermal energy.

5. The hydrogen production and storage ammonia synthesis system according to claim 2, characterized in that: The cold fluid outlet of the first heat exchanger, the hot fluid storage tank, the fourth pipeline and the hot fluid inlet of the solid-state hydrogen storage device are connected in sequence, and the cold fluid inlet of the first heat exchanger, the cold fluid storage tank and the hot fluid outlet of the solid-state hydrogen storage device are connected in sequence, and a heat transfer oil flow regulating valve is provided on the fourth pipeline.

6. The hydrogen production and storage ammonia synthesis system according to claim 2, characterized in that: The first delivery pipeline and the second delivery pipeline are both provided with flow regulating valves.

7. The hydrogen production and storage ammonia synthesis system according to claim 3, characterized in that: The hydrogen outlet of the hydrogen production device, the fifth pipeline, the compressor and the hydrogen inlet of the solid hydrogen storage device are connected in sequence, and the fifth pipeline is provided with a first flow regulating valve; The hydrogen outlet of the solid-state hydrogen storage device is connected to the inlet of the compressor through a sixth pipeline, and a second flow regulating valve is provided on the sixth pipeline.

8. The hydrogen production and storage ammonia synthesis system according to any one of claims 1 to 7, characterized in that: It includes a backup power supply, which includes a battery and a power generation device. The battery is used to store the electric energy generated by the renewable energy power generation device, the battery is used to supply power to the hydrogen production device and the air separation device, and the power generation device can be used to supply power to the air separation device.

9. The hydrogen production and storage ammonia synthesis system according to claim 8, characterized in that: The power generation device can be used to supply power to the hydrogen production device; The power generation device includes at least one of a diesel generator, a hydrogen fuel cell and an ammonia fuel cell; The renewable energy power generation device includes at least one of a wind generator and a solar generator.

10. The hydrogen production and storage ammonia synthesis system according to claim 8, characterized in that: The oxygen outlet of the hydrogen production device and the oxygen outlet of the air separation device are connected to the inlet of the oxygen storage tank; The outlet of the crude ammonia separation and purification device is communicated with an ammonia storage tank.

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