Synthetic ammonia equipment and synthetic ammonia method

Abstract

The invention relates to the technical field of ammonia synthesis equipment, in particular to ammonia synthesis equipment and an ammonia synthesis method. The ammonia synthesis equipment comprises a nitrogen supply assembly, a green hydrogen supply assembly, a first mixing assembly and a reaction bin, the nitrogen supply assembly is configured to be used for conveying nitrogen to the first mixing assembly in a first spiral conveying mode; the green hydrogen supply assembly is configured to be used for conveying green hydrogen to the first mixing assembly in a second spiral conveying mode, and the green hydrogen is used for representing hydrogen prepared based on renewable energy sources; the first mixing assembly is communicated with the reaction bin and is used for mixing nitrogen and hydrogen to form mixed gas flow, and the mixed gas flow is conveyed into the bin and is subjected to synthesis ammonia reaction in a low-pressure and low-temperature state. According to the invention, preparation of green hydrogen and synthesis of ammonia are coupled, so that efficient and stable production of synthesis ammonia is effectively ensured, and the production efficiency of synthesis ammonia is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of synthetic ammonia equipment, and in particular to a synthetic ammonia equipment and a synthetic ammonia method. Background Art

[0002] Ammonia is an inorganic compound, a colorless gas with a strong pungent odor, which is widely used in chemical industry, light industry, fertilizer, synthetic fiber, pharmaceutical and other fields. The market, storage and transportation and traditional application system of ammonia products are very mature and complete. It is a product with a complete industrial and commercial system and can be directly included in regional and global trade.

[0003] The existing ammonia synthesis process mainly adopts the Haber-Bosch process. The raw materials are nitrogen and hydrogen. Ammonia is generated through chemical reactions of catalysts at 200 atmospheres of pressure and a temperature of about 400 degrees Celsius.

[0004] However, the existing ammonia synthesis process has the following problems: the source of hydrogen is mainly generated by electrolyzing water using non-renewable resources, which makes the energy consumption of ammonia synthesis high, and also produces a lot of harmful impurities in the process of synthesizing ammonia. Summary of the invention

[0005] In view of this, the present invention provides a synthetic ammonia device and a synthetic ammonia method, which solve the problems of high energy consumption and easy generation of harmful impurities in the existing synthetic ammonia.

[0006] A first aspect of an embodiment of the present invention provides a synthetic ammonia device, the synthetic ammonia device comprising:

[0007] A nitrogen supply assembly, a green hydrogen supply assembly, a first mixing assembly and a reaction chamber;

[0008] The nitrogen supply assembly is connected to the first mixing assembly, and the nitrogen supply assembly is configured as Shanghai 2024-11485 (M240485CNI)

[0009] for conveying nitrogen to the first mixing component in a first spiral conveying manner;

[0010] The green hydrogen supply component is connected to the first mixing component, and the green hydrogen supply component is configured to deliver green hydrogen to the first mixing component in a second spiral delivery manner, wherein the green hydrogen is used to characterize hydrogen prepared based on renewable energy;

[0011] The first mixing component is connected to the reaction chamber, and is used to mix the nitrogen delivered by the first screw delivery method and the hydrogen delivered by the second screw delivery method to form a mixed gas flow, and the mixed gas flow is delivered to the reaction chamber and performs a synthetic ammonia reaction under low pressure and low temperature conditions.

[0012] In some embodiments, the synthetic ammonia plant further comprises a grey hydrogen transport component;

[0013] The gray hydrogen delivery component is connected to the first mixing component to deliver gray hydrogen to the first mixing component, wherein the gray hydrogen is used to characterize hydrogen prepared based on non-renewable energy sources;

[0014] Wherein, the ash hydrogen transport component comprises an ash hydrogen transport pipeline, and the ash hydrogen transport pipeline is provided with an ash hydrogen quantitative control valve and an ash hydrogen flow detection component;

[0015] The grey hydrogen delivery pipeline is in communication with the first mixing assembly;

[0016] The ash hydrogen quantitative control valve and the ash hydrogen flow detection component are sequentially arranged on the ash hydrogen delivery pipeline, and the ash hydrogen flow detection component is arranged close to the first mixing component;

[0017] A Venturi tube section is provided on the gray hydrogen delivery pipeline between the gray hydrogen flow detection component and the first mixing assembly.

[0018] In some embodiments, the green hydrogen supply assembly includes a green hydrogen transmission pipeline, a green hydrogen quantitative control valve, and a green hydrogen flow detection component;

[0019] The hydrogen transported through the green hydrogen transport pipeline is produced by electrolyzing water with green electricity generated by renewable energy;

[0020] The green hydrogen quantitative control valve and the green hydrogen flow detection component are sequentially arranged on the green hydrogen delivery pipeline, and the green hydrogen flow detection component is arranged close to the first mixing assembly.

[0021] In some embodiments, the green hydrogen supply assembly further includes a hydrogen storage tank;

[0022] One outlet of the green hydrogen delivery pipeline is connected to the first mixing assembly through a first branch;

[0024] The inlet end of the hydrogen storage tank is connected to another outlet of the green hydrogen delivery pipeline, and the outlet end of the hydrogen storage tank is connected to the first mixing assembly through a second branch.

[0025] In some embodiments, the nitrogen supply assembly includes a nitrogen delivery pipeline, a nitrogen quantitative control valve, and a nitrogen flow detection element;

[0026] The nitrogen delivery pipeline is in communication with the first mixing assembly;

[0027] The nitrogen quantitative control valve and the nitrogen flow detection component are sequentially arranged on the nitrogen delivery pipeline, and the nitrogen flow detection component is arranged close to the first mixing component.

[0028] In some embodiments, the first mixing assembly includes a first mixing chamber, a first hydrogen gas measuring instrument, and a first nitrogen gas measuring instrument;

[0029] The first mixing chamber is provided with a first spiral inlet, a second spiral inlet and a straight inlet, and the first spiral inlet is connected to the nitrogen delivery pipeline;

[0030] The second spiral inlet is in communication with the green hydrogen delivery pipeline;

[0031] The straight-through inlet is in communication with the gray hydrogen transport pipeline, wherein the gas outlet end of the straight-through inlet is opposite to the intersection of the gas flows of the first spiral inlet and the second spiral inlet, so as to form a mixed gas flow in a turbulent state in the first mixing chamber;

[0032] The outlet end of the first mixing chamber is connected to the reaction chamber through a third branch, and the first hydrogen measuring instrument and the first nitrogen measuring instrument are arranged on the third branch at intervals.

[0033] In some embodiments, the ammonia synthesis plant further comprises a second mixing assembly;

[0034] The second mixing assembly includes a second mixing chamber and a fourth branch;

[0035] The inlet end of the second mixing chamber is connected to the third branch, and the two ends of the fourth branch are connected to the outlet end of the second mixing chamber and the reaction chamber respectively, wherein the fourth branch is provided with a second hydrogen measuring instrument and a second nitrogen measuring instrument at intervals;

[0036] A first bypass pipeline is connected between the nitrogen delivery pipeline and the second mixing chamber; a second bypass pipeline is connected between the green hydrogen delivery pipeline and the second mixing chamber.

[0037] The second aspect of the embodiment of the present invention provides a method for synthesizing ammonia, which is applied to Shanghai 2024-11485 (M240485CNI) as described in the first aspect.

[0038] The synthetic ammonia equipment described above, the synthetic ammonia method described above comprises:

[0039] Green electricity produced from renewable energy is used to electrolyze water using a mixture of PEM and alkali to obtain green hydrogen, where part of the hydrogen in the green hydrogen is stored in a solid form;

[0040] The green hydrogen is used as a hydrogen supply source, and another part of the hydrogen in the green hydrogen is combined with nitrogen to perform a synthetic ammonia reaction in a reaction chamber under low pressure and low temperature conditions.

[0041] In some embodiments, the method for synthesizing ammonia further comprises:

[0042] Based on the gray electricity produced by non-renewable energy, gray hydrogen is obtained by electrolyzing water through a mixture of PEM and alkali solution;

[0043] The step of using the green hydrogen as a hydrogen supply source and cooperating with nitrogen to perform a synthetic ammonia reaction in a reaction chamber under low pressure and low temperature conditions comprises:

[0044] The green hydrogen is used as the main supply source of hydrogen, the gray hydrogen is used as the auxiliary supply source of hydrogen, and nitrogen is combined to perform a synthetic ammonia reaction in a reaction chamber under low pressure and low temperature conditions.

[0045] In some embodiments, the step of using the green hydrogen as a supply source of hydrogen and the step of using the green hydrogen as a main supply source of hydrogen include:

[0046] When the pressure of the green hydrogen supply is unstable, the hydrogen storage tank supplies the hydrogen at least for a first time at full load; or

[0047] When the pressure of the green hydrogen supply fluctuates at night, the load of the synthesis loop in the reaction chamber is adjusted to between 35% and 45%, and the hydrogen is supplied for at least a second period of time based on the hydrogen storage tank.

[0048] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0049] In the synthetic ammonia equipment and synthetic ammonia system of the present invention, the synthetic ammonia equipment includes a nitrogen supply component, a green hydrogen supply component, a first mixing component and a reaction chamber, wherein the nitrogen supply component is configured to deliver nitrogen to the first mixing component in a first bolt delivery mode, and the green hydrogen supply component is configured to deliver green hydrogen to the first mixing component in a second screw delivery mode, and the green hydrogen is used to characterize the hydrogen prepared based on renewable energy. The first mixing component is connected to the reaction chamber, and the mixing is used to mix nitrogen and hydrogen to form a mixed gas flow, and then the mixed gas flow is delivered to the reaction chamber and is combined under low pressure and low temperature. Shanghai 2024-11485 (M240485CNI)

[0050] Ammonia formation reaction. The ammonia synthesis equipment based on the present invention can realize the coupling of the production of green hydrogen and the ammonia synthesis reaction, effectively ensuring the efficient and stable production of synthetic ammonia and improving the production efficiency of synthetic ammonia. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0052] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0053] Figure 1 is a structural schematic diagram of a synthetic ammonia device according to an embodiment of the present invention;

[0054] Figure 2 is another structural schematic diagram of a synthetic ammonia device according to an embodiment of the present invention;

[0055] Figure 3 is another structural schematic diagram of a synthetic ammonia device according to an embodiment of the present invention;

[0056] Figure 4 It is a flow chart of the steps of a method for synthesizing ammonia according to an embodiment of the present invention.

[0057] Description of reference numerals:

[0058] 100. Synthetic ammonia equipment;

[0059] 200, nitrogen supply assembly; 210, nitrogen delivery pipeline; 220, nitrogen quantitative control valve; 230, nitrogen flow detection component; 240, overpressure venting regulating valve; 250, first bypass pipeline;

[0060] 300, green hydrogen supply assembly; 310, green hydrogen delivery pipeline; 320, green hydrogen quantitative control valve; 330, green hydrogen flow detection component; 340, hydrogen storage tank; 350, first branch; 360, second branch; 370, second bypass pipeline;

[0061] Shanghai 2024-11485(M240485CNI)

[0062] 400, first mixing assembly; 410, first mixing chamber; 420, first hydrogen measuring instrument; 430, first nitrogen measuring instrument; 440, third branch;

[0063] 500, reaction chamber;

[0064] 600, ash hydrogen conveying assembly; 610, ash hydrogen conveying pipeline; 620, ash hydrogen quantitative control valve; 630, ash hydrogen flow detection component; 640, venturi tube section;

[0065] 700, second mixing assembly; 710, second mixing chamber; 711, agitator plate; 712, agitator fan; 720, second hydrogen measuring instrument; 730, second nitrogen measuring instrument; 740, fourth branch;

[0066] 800, early warning. DETAILED DESCRIPTION

[0067] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0069] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0070] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes such product or Shanghai 2024-11485 (M240485CNI)

[0071] Elements inherent to the system. In the absence of more restrictions, the elements defined by the phrase "comprising a ..." do not exclude the existence of other identical elements in the product or system comprising the elements.

[0072] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0073] like Figure 1 As shown, an exemplary embodiment of the present invention provides an ammonia synthesis device 100, which includes a nitrogen supply assembly 200, a green hydrogen supply assembly 300, a first mixing assembly 400 and a reaction chamber 500.

[0074] The nitrogen supply assembly 200 is connected to the first mixing assembly 400 , and the nitrogen supply assembly 200 is configured to deliver nitrogen to the first mixing assembly 400 in a first spiral delivery manner.

[0075] The nitrogen supply assembly 200 includes a nitrogen delivery pipeline 210, a nitrogen quantitative control valve 220, and a nitrogen flow detection element 230. One end of the nitrogen delivery pipeline 210 is connected to the air separation device, and the other end of the nitrogen delivery pipeline 210 is connected to the first mixing assembly 400, wherein the nitrogen in the air is separated by the air separation device in the prior art, and the nitrogen is delivered to the first mixing assembly 400 through the nitrogen delivery pipeline 210.

[0076] The nitrogen quantitative control valve 220 and the nitrogen flow detection member 230 are sequentially arranged at intervals on the nitrogen delivery pipeline 210, wherein the nitrogen flow detection member 230 is arranged close to the first mixing assembly 400. The nitrogen quantitative control valve 220 can be used to deliver a set amount of nitrogen to the first mixing assembly 400. The nitrogen flow detection member 230 is used to accurately detect the content of nitrogen in the nitrogen delivery pipeline 210 to ensure the subsequent delivery amount of nitrogen. The nitrogen flow detection member 230 may include but is not limited to a nitrogen flow meter.

[0077] It should be noted that, in order to avoid excessive pressure of the gas in the nitrogen delivery pipeline 210 and ensure that the gas pressure in the nitrogen delivery pipeline 210 is within a suitable pressure range, an overpressure venting regulating valve 240 is also provided on the nitrogen delivery pipeline 210. In one example, the pressure of the nitrogen in the nitrogen delivery pipeline 210 is maintained at about 2.1 MPa.

[0078] The green hydrogen supply assembly 300 is connected to the first mixing assembly 400, and the green hydrogen supply assembly 300 is equipped with Shanghai 2024-11485 (M240485CNI)

[0079] The arrangement is to transport green hydrogen to the first mixing assembly 400 in a second spiral transporting manner, where green hydrogen is used to characterize hydrogen prepared based on renewable energy.

[0080] Renewable energy may include but is not limited to clean energy, such as solar energy, wind energy, biomass energy, etc. In other words, the process of preparing hydrogen using renewable energy may be: first, using green electricity generated by solar photovoltaic power generation, wind power generation, biomass power generation, etc., where green electricity means that the emission of carbon dioxide is zero or close to zero during the power production process. Then, hydrogen is obtained by electrolyzing water using green electricity, and the hydrogen is transported to the first mixing assembly 400 for the next step of use.

[0081] The first mixing assembly 400 is connected to the reaction chamber 500, and the first mixing assembly 400 is used to mix the nitrogen delivered by the first screw delivery method and the hydrogen delivered by the second delivery method to form a mixed gas flow. Finally, the mixed gas flow is delivered to the reaction chamber 500, and a suitable amount of nitrogen and a suitable amount of hydrogen are used for ammonia synthesis reaction under the low-pressure and low-temperature state of the reaction chamber 500. Among them, the low-pressure and low-temperature state is a state where the pressure is 4.0MPa to 15.0MPa and the temperature is less than 100°C. The catalyst in the ammonia synthesis reaction uses a low-temperature and high-activity ammonia synthesis catalyst to meet the frequent start-stop requirements of the ammonia synthesis equipment 100 in the load range of 10% to 11%, and realize zero-carbon production in the whole process of ammonia synthesis.

[0082] The reaction chamber 500 may adopt a synthesis tower or a synthesis bed in the prior art, which will not be described in detail here.

[0083] In this example, the production of green hydrogen is coupled with synthetic ammonia, which effectively ensures the efficient and stable production of synthetic ammonia and improves the production efficiency of synthetic ammonia.

[0084] like Figure 2 and Figure 3 Combined with Figure 1 As shown, in some embodiments, the ammonia synthesis equipment 100 further includes a gray hydrogen transport component 600 .

[0085] The gray hydrogen delivery component 600 is connected to the first mixing component 400 to deliver gray hydrogen to the first mixing component 400. Gray hydrogen is used to characterize hydrogen produced based on non-renewable energy. Non-renewable energy includes coal, oil, natural gas, etc.

[0086] The preparation process of grey hydrogen is as follows: first, grey electricity is produced from non-renewable energy sources such as coal, oil, and natural gas. Then, hydrogen is obtained by electrolyzing water using the grey electricity, and the hydrogen is transported to the first mixing assembly 400 for the next step of use.

[0087] In one example, the gray hydrogen transport assembly 600 includes a gray hydrogen transport pipeline 610, which is used for gray hydrogen transport Shanghai 2024-11485 (M240485CNI)

[0088] The pipeline 610 is provided with an ash hydrogen quantitative control valve 620 and an ash hydrogen flow detection element 630 .

[0089] Among them, the gray hydrogen quantitative control valve 620 and the gray hydrogen flow detection component 630 are sequentially arranged at intervals on the gray hydrogen delivery pipeline 610, and the gray hydrogen flow detection component 630 is arranged close to the first mixing component 400. The gray hydrogen quantitative control valve 620 can be used to deliver a set amount of gray hydrogen to the first mixing component 400. The gray hydrogen flow detection component 630 is used to accurately detect the nitrogen content in the gray hydrogen delivery pipeline 610 to ensure the subsequent gray hydrogen delivery amount. The gray hydrogen flow detection component 630 may include but is not limited to a hydrogen flow meter.

[0090] In order to ensure the transportation efficiency and transportation rate of the gray hydrogen in the gray hydrogen transportation pipeline 610 , a venturi tube section 640 is provided on the gray hydrogen transportation pipeline 610 between the gray hydrogen flow detection element 630 and the first mixing assembly 400 .

[0091] In this example, the structural design of the gray hydrogen delivery component 600 allows gray hydrogen and green hydrogen to be delivered to the first mixing component 400 at the same time, or to be delivered to the first mixing component 400 one after another, and then, in combination with nitrogen, continuous, efficient and stable production of synthetic ammonia is achieved, so as to effectively improve the production efficiency of synthetic ammonia and effectively solve the problem that nitrogen delivery and hydrogen delivery in the existing synthetic ammonia system are not well matched. It should be noted that the order of delivering gray hydrogen or green hydrogen is not specifically limited here.

[0092] In a preferred example, hydrogen is transported mainly by the green hydrogen supply assembly 300 and supplemented by the gray hydrogen transport assembly 600, thereby effectively improving the utilization rate of renewable energy while reducing the consumption of non-renewable energy.

[0093] like Figures 1 to 3 As shown, in some embodiments, the green hydrogen supply assembly 300 includes a green hydrogen delivery pipeline 310 , a green hydrogen quantitative control valve 320 , and a green hydrogen flow detection element 330 .

[0094] The hydrogen transported through the green hydrogen transport pipeline 310 is produced by electrolyzing water with green electricity generated by renewable energy, that is, green electricity is generated by renewable energy, and then the green electricity is used to electrolyze water to produce hydrogen through a mixed method of PEM plus alkaline solution.

[0095] The green hydrogen quantitative control valve 320 and the green hydrogen flow detection component 330 are sequentially arranged at intervals on the green hydrogen delivery pipeline 310. The green hydrogen quantitative control valve 320 can deliver a set amount of green hydrogen to the first mixing assembly 400. The green hydrogen flow detection component 330 is used to accurately detect the content of green hydrogen Shanghai 2024-11485 (M240485CNI) in the green hydrogen delivery pipeline 310 to ensure the subsequent delivery of green hydrogen. The green hydrogen flow detection component 330 may include but is not limited to a hydrogen flow meter.

[0096] Reference Figures 1 to 3 As shown, the green hydrogen supply assembly 300 further includes a hydrogen storage tank 340 , wherein the green hydrogen delivery pipeline 310 may have a plurality of outlets, and one of the outlets of the green hydrogen delivery pipeline 310 is connected to the first mixing assembly 400 through the first branch 350 .

[0097] Another outlet of the green hydrogen delivery pipeline 310 is connected to the inlet end of the hydrogen storage tank 340 , and the gas outlet end of the hydrogen storage tank 340 is connected to the first mixing assembly 400 through the second branch 360 .

[0098] It should be noted that part of the hydrogen prepared by green electricity can be directly transported to the first mixing assembly 400 through the first branch 350, while the other part of the hydrogen is transported to the hydrogen storage tank 340 and stored in a solid form.

[0099] In the production process of green hydrogen, due to the intermittent and unstable nature of renewable energy such as solar energy or wind energy, the green electricity generated is unstable. Therefore, the production of green hydrogen will also be volatile, that is, the delivery pressure of green hydrogen in the green hydrogen delivery pipeline 310 is unstable. When the pressure of green hydrogen in the first branch 350 is unstable during delivery, that is, when pressure fluctuation occurs, the second branch 360 between the hydrogen storage tank 340 and the first mixing assembly 400 is connected, and the hydrogen storage tank 340 supplies hydrogen for at least one hour under full load to ensure continuous and efficient production of the subsequent synthetic ammonia process.

[0100] On the other hand, when synthesizing ammonia at night, pressure fluctuations may occur when hydrogen is supplied by green hydrogen. For example, when green electricity is generated in the form of solar photovoltaic power generation, there is no light at night. At this time, pressure fluctuations may occur in the hydrogen in the green hydrogen delivery pipeline 310 and the first branch 350. When pressure fluctuations occur, the control system of the ammonia synthesis equipment adjusts the load in the reaction chamber 500 to between 35% and 45%, and supplies hydrogen for at least two hours based on the hydrogen storage tank 340 to ensure the continuous and efficient production of the subsequent ammonia synthesis process and improve the production efficiency of synthetic ammonia.

[0101] It should be noted that the control system of the synthetic ammonia plant 100 adopts a control unit in the prior art, and as long as the control unit can autonomously control the function control and action control of each functional component or each action structure in the synthetic ammonia plant 100, the specific control logic of the control unit will not be repeated. Shanghai 2024-11485 (M240485CNI)

[0102] like Figures 1 to 3 As shown, in some embodiments, the first mixing assembly 400 includes a first mixing chamber 410 , a first hydrogen meter 420 , and a first nitrogen meter 430 .

[0103] A first spiral inlet, a second spiral inlet and a straight inlet are provided in the first mixing chamber 410. The first spiral inlet is connected to the nitrogen delivery pipeline 210, and the second spiral inlet is connected to the green hydrogen delivery pipeline 310. The straight inlet is connected to the gray hydrogen delivery pipeline 610. The outlet end of the straight inlet is directly opposite to the intersection of the airflows of the first spiral inlet and the second spiral inlet. Based on this, the gray hydrogen can be used to disperse the merged green hydrogen and nitrogen, thereby forming a mixed airflow in a circling state in the first mixing chamber 410, so that the appropriate amount of nitrogen and the appropriate amount of hydrogen are fully mixed in a predetermined ratio, ensuring the efficient implementation of the subsequent synthetic ammonia process.

[0104] Relative to the horizontal plane, the angle between the conveying direction of the first spiral inlet and the horizontal plane is smaller than the angle between the conveying direction of the second spiral inlet and the horizontal plane. Based on this, the green hydrogen enters the first mixing chamber 410 at a larger input angle, while the nitrogen enters the first mixing chamber 410 at a smaller input angle, and the conveying path of the nitrogen intersects with the conveying path of the green hydrogen. By setting the angle, the nitrogen can break up the conveying airflow of the green hydrogen, thereby forming a mixed airflow. Then, an appropriate amount of gray hydrogen is input in a straight line, and is blown directly at the intersection of the conveying path of the nitrogen and the conveying path of the green hydrogen, thereby forming a mixed airflow in a circumferential state, effectively improving the mixing efficiency of nitrogen and hydrogen.

[0105] The outlet end of the first mixing chamber 410 is connected to the reaction chamber 500 through the third branch 440 .

[0106] The first hydrogen measuring instrument 420 and the first nitrogen measuring instrument 430 are arranged at intervals on the third branch 440, wherein the first hydrogen measuring instrument 420 is used to quickly detect the hydrogen content in the mixed gas flow, and the first nitrogen measuring instrument 430 is used to quickly detect the nitrogen content in the mixed gas flow. When the hydrogen content detected by the first hydrogen measuring instrument 420 or the nitrogen content detected by the first nitrogen measuring instrument 430 is not within the preset content range, the control system of the synthetic ammonia equipment 100 can autonomously control whether to supplement hydrogen or supplement nitrogen.

[0107] It should be noted that when the detected hydrogen content is not within the preset content range, hydrogen can be added to the first mixing chamber 410 based on the cooperation between the hydrogen storage tank 340 and the second branch 360. Or, Shanghai 2024-11485 (M240485CNI)

[0108] Hydrogen can also be added to the first mixing chamber 410 based on the gray hydrogen delivery pipeline 610 .

[0109] like Figure 2 and Figure 3 As shown, in some embodiments, the synthetic ammonia device 100 further includes a second mixing assembly 700. The second mixing assembly 700 includes a second mixing chamber 710 and a fourth branch 740, the inlet end of the second mixing chamber 710 is connected to the third branch 440, and the two ends of the fourth branch 740 are respectively connected to the outlet end of the second mixing chamber 710 and the reaction chamber 500.

[0110] The inner diameter of the second mixing chamber 710 is much larger than the diameter of the third branch 440. Therefore, after the mixed gas flow enters the second mixing chamber 710 from the third branch 440, the mixing time of the appropriate amount of nitrogen and the appropriate amount of hydrogen can be effectively increased, so that the nitrogen and hydrogen are fully mixed again, so as to facilitate the efficient and stable implementation of the subsequent synthetic ammonia process. At the same time, a stirring member is provided in the second mixing chamber 710, and the stirring member may include but is not limited to a stirring fan. The stirring fan is used in the second mixing chamber 710 to further stir the mixed gas flow, thereby effectively improving the mixing effect of nitrogen and hydrogen.

[0111] In a specific example, the cross-sectional shape of the second mixing bin 710 is square or circular, the second mixing bin 710 is placed horizontally, a plurality of stirrer plates 711 are arranged in sequence and staggered in an up-and-down manner on the top and bottom walls of the second mixing bin 710, and a stirrer fan 712 is arranged on the front side wall of the second mixing bin 710.

[0112] A plurality of stirring plates 711 arranged up and down in sequence and staggered form a plurality of S-shaped flow channels to prolong the mixing time of the appropriate amount of nitrogen and the appropriate amount of hydrogen, and cooperate with the vortex of the stirring fan 712 to further improve the mixing effect of the appropriate amount of nitrogen and the appropriate amount of hydrogen.

[0113] A second hydrogen measuring instrument 720 and a second nitrogen measuring instrument 730 are arranged at intervals on the fourth branch 740. The second hydrogen measuring instrument 720 is used to quickly detect the hydrogen content in the mixed gas flow flowing out of the first mixing chamber 410, and the second nitrogen measuring instrument 730 is used to quickly detect the nitrogen content in the mixed gas flow flowing out of the first mixing chamber 410.

[0114] A first bypass pipeline 250 is connected between the nitrogen delivery pipeline 210 and the second mixing chamber 710, and a second bypass pipeline 370 is connected between the green hydrogen delivery pipeline 310 and the second mixing chamber 710. Specifically, both ends of the second bypass pipeline 370 are connected to the hydrogen storage tank 340 and the second mixing chamber 710, respectively.

[0115] When the hydrogen content detected by the second hydrogen measuring instrument 720 is not within the preset content range, Shanghai 2024-11485 (M240485CNI)

[0116] The control system of the synthetic ammonia equipment 100 autonomously controls the conduction of the second bypass line 370 to supplement an appropriate amount of hydrogen into the second mixing chamber 710 .

[0117] When the nitrogen content detected by the second nitrogen measuring instrument 730 is not within the preset content range, the control system of the synthetic ammonia equipment 100 can autonomously control the first bypass line 250 to be connected, so as to add an appropriate amount of nitrogen to the second mixing chamber 710. Based on this, the nitrogen-hydrogen ratio in the second mixing chamber 710 is accurately adjusted through the first bypass line 250 and the second bypass line 370, so as to ensure the continuous and efficient progress of the subsequent synthetic ammonia process and improve the production efficiency of synthetic ammonia.

[0118] It should be noted that the synthetic ammonia equipment 100 is also provided with an early warning component 800, which may include but is not limited to a buzzer alarm, an audible and visual alarm, etc. The early warning component 800 is respectively connected to the first hydrogen measuring instrument 420, the first nitrogen measuring instrument 430, the second hydrogen measuring instrument 720, and the second nitrogen measuring instrument 730. When the nitrogen-hydrogen ratio in the first mixing bin 410 or the second mixing bin 710 is not within a suitable range, or when the hydrogen content exceeds the standard or the nitrogen content exceeds the standard, the early warning component 800 issues an early warning prompt to remind the operator to make corresponding manual adjustments based on the early warning information, thereby ensuring the smooth progress of the synthetic ammonia process.

[0119] At the same time, control valves are also arranged in each pipeline, and the control valves can be manually controlled or all automatically controlled valves.

[0120] like Figure 4 As shown, an exemplary embodiment of the present invention provides a method for synthesizing ammonia, which comprises the following steps:

[0121] Step S100: Based on green electricity produced by renewable energy, water is electrolyzed by a mixture of PEM and alkaline solution to obtain green hydrogen, and part of the hydrogen in the green hydrogen is stored in solid form.

[0122] Step S200: Using green hydrogen as a hydrogen supply source, another part of the hydrogen in the green hydrogen is combined with nitrogen to perform a synthetic ammonia reaction in a reaction chamber under low pressure and low temperature conditions.

[0123] In step S100, the hydrogen transported through the green hydrogen transport pipeline 310 is produced by electrolyzing water with green electricity generated by renewable energy, that is, green electricity is generated by renewable energy, and then, hydrogen is produced by electrolyzing water with green electricity through a mixed method of PEM plus alkali solution. The process of electrolyzing water to produce hydrogen by a mixed method of PEM plus alkali solution can adopt the existing technology, which will not be repeated here.

[0124] Part of the prepared hydrogen is stored in the hydrogen storage tank 340 in a solid form.

[0125] Shanghai 2024-11485(M240485CNI)

[0126] In step S200, green hydrogen is used as the hydrogen supply source, and another part of the hydrogen in the green hydrogen is fully mixed with the nitrogen delivered through the nitrogen delivery pipeline 210 in the first mixing chamber 410, and then the mixed gas of the appropriate amount of nitrogen and the appropriate amount of hydrogen is delivered to the second mixing chamber 710 and fully mixed again. Finally, the fully mixed mixed gas is delivered to the reaction chamber 500, and the synthetic ammonia reaction is carried out under low pressure and low temperature conditions in the reaction chamber 500.

[0127] It should be noted that, in the first mixing chamber 410, nitrogen is transported to the first mixing chamber 410 through the nitrogen delivery pipe 210 in a first spiral delivery manner, green hydrogen is transported to the first mixing chamber 410 through the green hydrogen delivery pipe 310 in a second spiral delivery manner, and the required gray hydrogen is transported to the first mixing chamber 410 in a linear input manner. Among them, relative to the horizontal plane, the angle between the delivery direction of the first spiral delivery and the horizontal plane is smaller than the angle between the delivery direction of the second spiral delivery and the horizontal plane. Based on this, green hydrogen enters the first mixing chamber 410 at a larger input angle, while nitrogen enters the first mixing chamber 410 at a smaller input angle, and the delivery path of nitrogen intersects with the delivery path of green hydrogen. By setting the angle, nitrogen can break up the delivery airflow of green hydrogen, thereby forming a mixed airflow, which improves the mixing efficiency of nitrogen and hydrogen.

[0128] In this example, green hydrogen produced from renewable energy can be used as a hydrogen supply source and combined with nitrogen to synthesize ammonia. In other words, renewable energy is used throughout the ammonia synthesis reaction process to achieve zero carbon emissions during the ammonia production process.

[0129] In some embodiments, the method for synthesizing ammonia further comprises the following method:

[0130] Gray hydrogen is produced by electrolyzing water using a mixture of PEM and alkali solution based on gray electricity produced by non-renewable energy sources.

[0131] Then, with green hydrogen as the main supply source of hydrogen and gray hydrogen as the auxiliary supply source of hydrogen, the nitrogen is combined to perform ammonia synthesis reaction in the reaction chamber 500 under low pressure and low temperature. An appropriate amount of gray hydrogen is inputted in a straight line and blown directly at the intersection of the nitrogen delivery path and the green hydrogen delivery path, thereby converting the mixed state airflow into a mixed airflow in a circling state, effectively improving the mixing efficiency of nitrogen and hydrogen.

[0132] In this example, when the hydrogen produced by green hydrogen is not enough to meet the needs of the subsequent synthetic ammonia process, Shanghai 2024-11485 (M240485CNI)

[0133] The hydrogen produced from grey hydrogen is used as an auxiliary supply source to ensure efficient and stable production of subsequent synthetic ammonia reactions and improve the effectiveness of synthetic ammonia.

[0134] It should be noted that when the supply of green hydrogen delivered to the first mixing chamber 410 through the first branch 350 is small, the hydrogen storage tank 340 can also be autonomously controlled by the control system to supply the required hydrogen to the first mixing chamber 410.

[0135] In some embodiments, when the pressure of the green hydrogen supply is unstable, the hydrogen storage tank 340 supplies hydrogen at least for a first time at full load to ensure efficient and stable production of the synthetic ammonia process.

[0136] In the production process of green hydrogen, due to the intermittent and unstable nature of renewable energy such as solar energy or wind energy, the green electricity generated is unstable. Therefore, the production of green hydrogen will also be volatile, that is, the delivery pressure of green hydrogen in the green hydrogen delivery pipeline 310 is unstable. When the pressure of green hydrogen in the first branch 350 is unstable during delivery, that is, when pressure fluctuation occurs, the second branch 360 between the hydrogen storage tank 340 and the first mixing assembly 400 is connected, and the hydrogen storage tank 340 supplies hydrogen for at least one hour under full load to ensure continuous and efficient production of the subsequent synthetic ammonia process.

[0137] That is to say, in the process of synthetic ammonia, the use of hydrogen storage tanks can effectively solve the impact caused by the volatility and intermittency of renewable energy.

[0138] When the pressure of the green hydrogen supply fluctuates at night, the load of the synthesis loop in the reaction chamber 500 is adjusted between 35% and 45%, and hydrogen is supplied for at least a second period of time based on the hydrogen storage tank 340.

[0139] When synthesizing ammonia at night, pressure fluctuations may occur when hydrogen is supplied in the form of green hydrogen. For example, when green electricity is generated in the form of solar photovoltaic power generation, there is no light at night. At this time, pressure fluctuations may occur in the hydrogen in the green hydrogen delivery pipeline 310 and the first branch 350. When pressure fluctuations occur, the control system of the synthetic ammonia equipment adjusts the load of the synthesis loop in the reaction chamber 500 to 40%, and supplies hydrogen for at least two hours based on the hydrogen storage tank 340 to ensure the continuous and efficient production of the subsequent synthetic ammonia process and improve the production efficiency of synthetic ammonia.

[0140] It should be noted that the synthesis circuit in the reaction chamber 500 can adopt the structure in the prior art, which will not be described in detail here.

[0141] When the night control system determines that the hydrogen input has pressure fluctuations, it first reduces the synthesis Shanghai 2024-11485 (M240485CNI)

[0142] The load of the loop is reduced to 40%, which is the minimum load, and then the hydrogen storage tank 340 is used to transport hydrogen to the first mixing chamber 410 for at least two hours.

[0143] Excess nitrogen is introduced into and out of the synthesis loop to disrupt the mixing ratio of nitrogen and hydrogen in the first mixing chamber 410, which is 1:3, while maintaining the system pressure at 90 to 100 kg at 40% load. At this time, the reaction heat of synthetic ammonia in the reaction chamber 500 is reduced, and the stability of some components tends to decrease.

[0144] While nitrogen is injected, a heating component such as a heating furnace is used to provide heat to the reaction chamber 500 to replace the heat lost by the reaction heat, thereby maintaining the temperature of certain components in the reaction chamber 500 such as the tower bed layer above 360°C.

[0145] When the hydrogen supply is restored, the nitrogen-hydrogen ratio of 1:3 in the first mixing chamber 410 and the second mixing chamber 710 is gradually restored, and the temperature of the tower bed is maintained by the reaction heat of synthetic ammonia. At the same time, the heating component is slowly turned off to restore the normal synthetic ammonia process flow.

[0146] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0147] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A synthetic ammonia device, characterized in that: The synthetic ammonia equipment comprises: a nitrogen supply component, a green hydrogen supply component, a first mixing component and a reaction chamber; The nitrogen supply assembly is connected to the first mixing assembly, and the nitrogen supply assembly is configured to deliver nitrogen to the first mixing assembly in a first spiral delivery manner; The green hydrogen supply component is connected to the first mixing component, and the green hydrogen supply component is configured to deliver green hydrogen to the first mixing component in a second spiral delivery manner, wherein the green hydrogen is used to characterize hydrogen prepared based on renewable energy; The first mixing component is connected to the reaction chamber, and is used to mix the nitrogen delivered by the first screw delivery method and the hydrogen delivered by the second screw delivery method to form a mixed gas flow, and the mixed gas flow is delivered to the reaction chamber and performs a synthetic ammonia reaction under low pressure and low temperature conditions.

2. The synthetic ammonia plant according to claim 1, characterized in that: The synthetic ammonia equipment also includes a gray hydrogen transport component; The gray hydrogen delivery component is connected to the first mixing component to deliver gray hydrogen to the first mixing component, wherein the gray hydrogen is used to characterize hydrogen prepared based on non-renewable energy sources; Wherein, the ash hydrogen transport component comprises an ash hydrogen transport pipeline, and the ash hydrogen transport pipeline is provided with an ash hydrogen quantitative control valve and an ash hydrogen flow detection component; The grey hydrogen delivery pipeline is in communication with the first mixing assembly; The ash hydrogen quantitative control valve and the ash hydrogen flow detection component are sequentially arranged on the ash hydrogen delivery pipeline, and the ash hydrogen flow detection component is arranged close to the first mixing component; A Venturi tube section is provided on the gray hydrogen delivery pipeline between the gray hydrogen flow detection component and the first mixing assembly.

3. The synthetic ammonia plant according to claim 2, characterized in that: The green hydrogen supply assembly includes a green hydrogen pipeline, a green hydrogen quantitative control valve and a green hydrogen flow detection component; Shanghai 2024-11485 (M240485CNI) The hydrogen transported through the green hydrogen transport pipeline is produced by electrolyzing water with green electricity generated by renewable energy; The green hydrogen quantitative control valve and the green hydrogen flow detection component are sequentially arranged on the green hydrogen delivery pipeline, and the green hydrogen flow detection component is arranged close to the first mixing assembly.

4. The synthetic ammonia plant according to claim 3, characterized in that: The green hydrogen supply assembly also includes a hydrogen storage tank; One outlet of the green hydrogen delivery pipeline is connected to the first mixing assembly through a first branch; The inlet end of the hydrogen storage tank is connected to another outlet of the green hydrogen delivery pipeline, and the outlet end of the hydrogen storage tank is connected to the first mixing assembly through a second branch.

5. The synthetic ammonia plant according to claim 2, characterized in that: The nitrogen supply assembly includes a nitrogen delivery pipeline, a nitrogen quantitative control valve and a nitrogen flow detection component; The nitrogen delivery pipeline is in communication with the first mixing assembly; The nitrogen quantitative control valve and the nitrogen flow detection component are sequentially arranged on the nitrogen delivery pipeline, and the nitrogen flow detection component is arranged close to the first mixing component.

6. The synthetic ammonia plant according to any one of claims 2 to 5, characterized in that: The first mixing assembly includes a first mixing chamber, a first hydrogen gas measuring instrument, and a first nitrogen gas measuring instrument; The first mixing chamber is provided with a first spiral inlet, a second spiral inlet and a straight inlet, and the first spiral inlet is connected to the nitrogen delivery pipeline; The second spiral inlet is in communication with the green hydrogen delivery pipeline; The straight-through inlet is in communication with the gray hydrogen transport pipeline, wherein the gas outlet end of the straight-through inlet is opposite to the intersection of the gas flows of the first spiral inlet and the second spiral inlet, so as to form a mixed gas flow in a turbulent state in the first mixing chamber; The outlet end of the first mixing chamber is connected to the reaction chamber through a third branch, and the first hydrogen measuring instrument and the first nitrogen measuring instrument are arranged on the third branch at intervals.

7. The synthetic ammonia plant according to claim 6, characterized in that: The synthetic ammonia equipment is also Shanghai 2024-11485 (M240485CNI) including a second mixing assembly; The second mixing assembly includes a second mixing chamber and a fourth branch; The inlet end of the second mixing chamber is connected to the third branch, and the two ends of the fourth branch are connected to the outlet end of the second mixing chamber and the reaction chamber respectively, wherein the fourth branch is provided with a second hydrogen measuring instrument and a second nitrogen measuring instrument at intervals; A first bypass pipeline is connected between the nitrogen delivery pipeline and the second mixing chamber; a second bypass pipeline is connected between the green hydrogen delivery pipeline and the second mixing chamber.

8. A method for synthesizing ammonia, applied to the synthetic ammonia equipment according to any one of claims 1 to 7, characterized in that: The method for synthesizing ammonia comprises: Green electricity produced from renewable energy is used to electrolyze water using a mixture of PEM and alkali to obtain green hydrogen, where part of the hydrogen in the green hydrogen is stored in a solid form; The green hydrogen is used as a hydrogen supply source, and another part of the hydrogen in the green hydrogen is combined with nitrogen to perform a synthetic ammonia reaction in a reaction chamber under low pressure and low temperature conditions.

9. The method for synthesizing ammonia according to claim 8, characterized in that: The method for synthesizing ammonia further comprises: Based on the gray electricity produced by non-renewable energy, gray hydrogen is obtained by electrolyzing water through a mixture of PEM and alkali solution; The step of using the green hydrogen as a hydrogen supply source and cooperating with nitrogen to perform a synthetic ammonia reaction in a reaction chamber under low pressure and low temperature conditions includes: The green hydrogen is used as the main supply source of hydrogen, the gray hydrogen is used as the auxiliary supply source of hydrogen, and nitrogen is combined to perform a synthetic ammonia reaction in a reaction chamber under low pressure and low temperature conditions.

10. The method for synthesizing ammonia according to claim 9, characterized in that: The step of using the green hydrogen as a supply source of hydrogen, and the step of using the green hydrogen as a main supply source of hydrogen, include: When the pressure of the green hydrogen supply is unstable, the hydrogen is supplied at least for a first time based on the hydrogen storage tank under full load; or, Shanghai 2024-11485(M240485CNI) When the pressure of the green hydrogen supply fluctuates at night, the load of the synthesis loop in the reaction chamber is adjusted to between 35% and 45%, and the hydrogen is supplied for at least a second period of time based on the hydrogen storage tank.

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