Ammonia preparation system and method using off-grid green electricity

Abstract

The invention provides an ammonia preparation system and method using off-grid green power. The system comprises an off-grid green power supply subsystem, a hydrogen supply subsystem, an air separation nitrogen generation subsystem, a power generation subsystem, a power supply center and an ammonia synthesis subsystem, the off-grid green power supply subsystem is used for providing electric energy for the hydrogen supply subsystem and the power supply center; the hydrogen supply subsystem is used for providing hydrogen for the power generation subsystem and the ammonia synthesis subsystem; the air separation nitrogen generation subsystem is used for providing nitrogen for the ammonia synthesis subsystem; the power generation subsystem is used for providing electric energy for the power supply center, the power supply center is used for integrating the electric energy and providing the integrated electric energy for the ammonia synthesis subsystem and the air separation nitrogen generation subsystem, and the ammonia synthesis subsystem is used for providing ammonia for the power generation subsystem. According to the scheme, the off-grid green power supply subsystem and the power generation subsystem are combined, so that a self-sufficient, efficient, stable and environment-friendly energy supply system is provided for ammonia synthesis, the energy utilization efficiency is improved, and the stability and reliability of the ammonia preparation system are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of ammonia preparation, and in particular to a system and method for preparing ammonia using off-grid green electricity. Background Art

[0002] The traditional synthetic ammonia industry is one of the cores of the modern chemical industry. Since the invention of the Haber-Bosch process in the early 20th century, this process has provided important basic raw materials for the global agricultural and chemical industries by catalyzing the synthesis of ammonia from nitrogen and hydrogen under high temperature and high pressure conditions. However, traditional synthetic ammonia production relies on fossil energy, especially natural gas, which brings significant carbon emission problems.

[0003] In this context, the energy dependence of the traditional synthetic ammonia industry and its environmental impact have become key issues that need to be addressed urgently. Summary of the invention

[0004] In view of the defects in the prior art, the purpose of the present invention is to provide an ammonia preparation system and method using off-grid green electricity. By combining the off-grid green electricity power supply subsystem and the power generation subsystem, a self-sufficient, efficient, stable and environmentally friendly energy supply system is provided for synthetic ammonia, thereby improving energy utilization efficiency and enhancing the stability and reliability of the ammonia preparation system.

[0005] In order to solve the above technical problems, this application provides the following technical solutions:

[0006] According to a first aspect of an embodiment of the present application, there is provided an ammonia production system using off-grid green electricity, including an off-grid green electricity supply subsystem, a hydrogen supply subsystem, an air separation nitrogen production subsystem, a power generation subsystem, a power supply center, and an ammonia synthesis subsystem;

[0007] The off-grid green electricity supply subsystem is electrically connected to the hydrogen supply subsystem and the power supply center respectively, and is used to provide electrical energy to the hydrogen supply subsystem and the power supply center;

[0008] The hydrogen supply subsystem is connected to the power generation subsystem and the ammonia synthesis subsystem respectively, and is used to provide hydrogen to the power generation subsystem and the ammonia synthesis subsystem;

[0009] The air separation nitrogen production subsystem is connected to the power supply center and the ammonia synthesis subsystem respectively, and is used to provide nitrogen for the ammonia synthesis subsystem;

[0010] The power generation subsystem, the power supply center and the ammonia synthesis subsystem are connected in pairs. The power generation subsystem is used to provide electric energy to the power supply center, the power supply center is used to integrate electric energy and provide the integrated electric energy to the ammonia synthesis subsystem and the air separation nitrogen production subsystem, and the ammonia synthesis subsystem is used to provide ammonia to the power generation subsystem.

[0011] Furthermore, the hydrogen supply subsystem includes a hydrogen production device and a hydrogen storage device;

[0012] The off-grid green electricity supply subsystem is electrically connected to the hydrogen production equipment for providing electrical energy to the hydrogen production equipment. The hydrogen production equipment is connected to the hydrogen storage equipment for providing hydrogen to the hydrogen storage equipment. The hydrogen storage equipment is respectively connected to the ammonia synthesis subsystem and the power generation subsystem for providing hydrogen to the ammonia synthesis subsystem and the power generation subsystem.

[0013] Further, the air separation nitrogen production subsystem includes nitrogen production equipment and nitrogen storage equipment;

[0014] The nitrogen production equipment is respectively connected to the power supply center, the ammonia synthesis subsystem and the nitrogen storage equipment, and is used to receive the electric energy provided by the power supply center to realize the operation of the air separation nitrogen production process, and is used to provide nitrogen to the ammonia synthesis subsystem and the nitrogen storage equipment. The nitrogen storage equipment is connected to the ammonia synthesis subsystem and is used to provide nitrogen to the ammonia synthesis subsystem.

[0015] Furthermore, the off-grid green electricity supply subsystem includes off-grid green electricity and electricity storage equipment;

[0016] The off-grid green electricity is electrically connected to the hydrogen supply subsystem, the power supply center and the power storage device respectively, and is used to provide electrical energy to the hydrogen supply subsystem, the power supply center and the power storage device;

[0017] The power storage device is electrically connected to the power supply center and is used to provide electric energy to the power supply center.

[0018] Furthermore, the off-grid green electricity is off-grid wind / solar power generation.

[0019] Furthermore, the power generation subsystem adopts a gas turbine generator set.

[0020] According to a second aspect of an embodiment of the present application, a method for preparing ammonia using off-grid green electricity is provided, which is applied to any of the above-mentioned ammonia preparation systems using off-grid green electricity, comprising:

[0021] Acquire generated electric energy data corresponding to the electric energy generated by the off-grid green electricity supply subsystem;

[0022] Determine whether the generated electric energy data can simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the air separation nitrogen production process of the air separation nitrogen production subsystem, and the ammonia synthesis process of the ammonia synthesis subsystem; the normal operation indicates that the operation index of the process within the preset time is within a preset range;

[0023] In the case where the generated power data cannot simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the air separation nitrogen production process of the air separation nitrogen production subsystem, and the ammonia synthesis process of the ammonia synthesis subsystem, determining whether the generated power data can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem;

[0024] In the case where the generated power data cannot satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, determining whether the sum of the generated power data and the stored power data corresponding to the power stored in the off-grid green electricity supply subsystem can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem;

[0025] In the case where the sum of the generated electric energy data and the stored electric energy data cannot satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, determining whether the hydrogen stored in the hydrogen supply subsystem can simultaneously satisfy the requirement of providing hydrogen for the ammonia synthesis subsystem and the power generation subsystem to realize the normal operation of the ammonia synthesis process;

[0026] In the case that the hydrogen stored in the hydrogen supply subsystem can simultaneously provide hydrogen for the ammonia synthesis subsystem and the power generation subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, and the hydrogen stored in the hydrogen supply subsystem is provided to the power generation subsystem, so that the power generation subsystem generates electric energy and provides the generated electric energy to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem, and the hydrogen stored in the hydrogen supply subsystem and the nitrogen stored in the air separation nitrogen production subsystem are provided to the ammonia synthesis subsystem, so that the ammonia synthesis process of the ammonia synthesis subsystem operates normally.

[0027] Furthermore, the method further comprises:

[0028] When the sum of the generated electric energy data and the stored electric energy data can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, the electric energy generated and the stored electric energy of the off-grid green electricity supply subsystem are provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem, and when the electric energy provided by the power supply center exceeds the electric energy required by the ammonia synthesis subsystem, the remaining electric energy is provided to the air separation nitrogen production subsystem, so that the air separation nitrogen production subsystem produces nitrogen through the air separation nitrogen production process, and the hydrogen stored in the hydrogen supply subsystem and the nitrogen produced and / or stored in the air separation nitrogen production subsystem are provided to the ammonia synthesis subsystem, so that the ammonia synthesis process can operate normally.

[0029] Furthermore, the method further comprises:

[0030] In the case that the hydrogen stored in the hydrogen supply subsystem cannot simultaneously satisfy the need to provide hydrogen for the ammonia synthesis subsystem and the power generation subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, and the ammonia synthesis subsystem is utilized to provide ammonia for the power generation subsystem, so that the power generation subsystem generates electric energy and provides it to the power supply center, and then the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem, thereby realizing the use of the hydrogen stored in the hydrogen supply subsystem and the nitrogen stored in the air separation nitrogen production subsystem to provide gas for the ammonia synthesis subsystem, so that the ammonia synthesis process of the ammonia synthesis subsystem operates at the minimum load condition.

[0031] Furthermore, the method further comprises:

[0032] In the case where the generated power data can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, determining whether the sum of the generated power data and the stored power data can simultaneously satisfy the normal operation of the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem;

[0033] When the sum of the generated electric energy data and the stored electric energy data can simultaneously meet the normal operation of the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem, the electric energy generated and the stored electric energy of the off-grid green electricity supply subsystem are provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem and the air separation nitrogen production subsystem, and provides the hydrogen stored in the hydrogen supply subsystem and the nitrogen generated by the air separation nitrogen production subsystem to the ammonia synthesis subsystem, so that the ammonia synthesis process can operate normally.

[0034] Furthermore, the method further comprises:

[0035] In the case where the generated electric energy data can simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem, the off-grid green electricity supply subsystem provides electric energy for the hydrogen supply subsystem, and provides electric energy for the air separation nitrogen production subsystem and the ammonia synthesis subsystem through the power supply center, so that the hydrogen supply subsystem generates hydrogen through the hydrogen production process and the air separation nitrogen production subsystem generates nitrogen through the air separation nitrogen production process and provides the nitrogen to the ammonia synthesis subsystem to realize the ammonia synthesis process;

[0036] Determine whether there is redundant power;

[0037] In the presence of the redundant electric energy, a portion of the redundant electric energy is stored in the off-grid green electricity supply subsystem, and another portion of the redundant electric energy is used to provide electric energy to the hydrogen supply subsystem and the air separation nitrogen production subsystem, so that the hydrogen supply subsystem and the air separation nitrogen production subsystem can produce gas for storage.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The ammonia preparation system using off-grid green electricity provided by the present invention provides a self-sufficient, efficient, stable and environmentally friendly energy supply system for synthetic ammonia by combining the off-grid green electricity supply subsystem and the power generation subsystem, so that even in remote areas or areas with underdeveloped power grids, it can provide stable clean energy for the ammonia synthesis process, reduce carbon emissions, accelerate carbon circulation, improve energy utilization efficiency, optimize energy structure and energy storage and power regulation, reduce production costs and environmental pollution, enhance the stability and reliability of the ammonia preparation system, promote sustainable development, increase economic benefits, and realize efficient operation of the process; in addition, the system avoids the shutdown of the ammonia synthesis process by integrating the off-grid green electricity supply subsystem, the hydrogen supply subsystem and the power generation subsystem, and effectively avoids problems such as affecting production efficiency, damaging equipment life, increasing production costs and bringing safety hazards.

[0040] The present invention also provides a method for preparing ammonia using off-grid green electricity. The method for preparing ammonia using off-grid green electricity is applied to the above-mentioned ammonia preparation system using off-grid green electricity. Since the method for preparing ammonia using off-grid green electricity includes the technical solution of the above-mentioned ammonia preparation system using off-grid green electricity, it has the corresponding technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0042] Figure 1 A schematic structural diagram of an ammonia production system utilizing off-grid green electricity provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0044] Embodiment 1:

[0045] See also Figure 1, an embodiment of the present application provides an ammonia preparation system using off-grid green electricity, including an off-grid green electricity supply subsystem, a hydrogen supply subsystem, an air separation nitrogen production subsystem, a power generation subsystem, a power supply center and an ammonia synthesis subsystem;

[0046] The off-grid green electricity supply subsystem is electrically connected to the hydrogen supply subsystem and the power supply center respectively, and is used to provide electric energy to the hydrogen supply subsystem and the power supply center;

[0047] The hydrogen supply subsystem is connected to the power generation subsystem and the ammonia synthesis subsystem respectively, and is used to provide hydrogen to the power generation subsystem and the ammonia synthesis subsystem;

[0048] The air separation nitrogen production subsystem is connected to the power supply center and the ammonia synthesis subsystem respectively to provide nitrogen for the ammonia synthesis subsystem;

[0049] The power generation subsystem, the power supply center and the ammonia synthesis subsystem are connected in pairs. The power generation subsystem is used to provide electric energy to the power supply center. The power supply center is used to integrate electric energy and provide the integrated electric energy to the ammonia synthesis subsystem and the air separation nitrogen production subsystem. The ammonia synthesis subsystem is used to provide ammonia to the power generation subsystem.

[0050] In a specific embodiment, the off-grid green electricity supply subsystem includes off-grid green electricity and power storage equipment; the off-grid green electricity is electrically connected to the hydrogen supply subsystem, the power supply center and the power storage equipment respectively, and is used to provide electric energy to the hydrogen supply subsystem, the power supply center and the power storage equipment; the power storage equipment is electrically connected to the power supply center, and is used to provide electric energy to the power supply center; wherein the off-grid green electricity is off-grid wind / solar power generation, that is, the off-grid green electricity adopts off-grid wind power generation or off-grid solar power generation, and the power storage equipment can adopt battery energy storage;

[0051] The hydrogen supply subsystem includes hydrogen production equipment and hydrogen storage equipment;

[0052] The off-grid green electricity supply subsystem is electrically connected to the hydrogen production equipment to provide electric energy to the hydrogen production equipment, the hydrogen production equipment is connected to the hydrogen storage equipment to provide hydrogen to the hydrogen storage equipment, the hydrogen storage equipment is respectively connected to the ammonia synthesis subsystem and the power generation subsystem to provide hydrogen to the ammonia synthesis subsystem and the power generation subsystem; wherein the electric energy source of the hydrogen production equipment is off-grid green electricity, and it produces hydrogen by electrolyzing water;

[0053] The air separation nitrogen production subsystem includes nitrogen production equipment and nitrogen storage equipment; the nitrogen production equipment is connected to the power supply center, the ammonia synthesis subsystem and the nitrogen storage equipment respectively, and is used to receive the electric energy provided by the power supply center to realize the operation of the air separation nitrogen production process, and is used to provide nitrogen to the ammonia synthesis subsystem and the nitrogen storage equipment. The nitrogen storage equipment is connected to the ammonia synthesis subsystem and is used to provide nitrogen to the ammonia synthesis subsystem; wherein the nitrogen production equipment includes structures such as a power system, a purification system, a refrigeration system, a heat exchange system, a distillation system, and a product transportation system;

[0054] The power generation subsystem uses a gas turbine generator set;

[0055] The power supply center is used to integrate the electric energy provided by off-grid green electricity, power storage equipment, and power generation subsystems, and provide the integrated electric energy to the ammonia synthesis subsystem so that the ammonia synthesis subsystem can obtain a stable power supply; and, when there is sufficient electric energy, the power supply center can also provide the integrated electric energy to the air separation nitrogen production subsystem so that the air separation nitrogen production subsystem can obtain power supply to realize the operation of the air separation nitrogen production process.

[0056] In a specific implementation scenario, the structure of the system is as follows Figure 1 As shown, the specific operating principle is as follows:

[0057] 1. Off-grid wind and solar power generation, including ① for water electrolysis to produce hydrogen; ② for direct power supply to the power supply center; ③ for battery energy storage (short-term energy storage);

[0058] 2. The ammonia synthesis process requires stable electricity, and a power supply center is used to provide stable power supply; typical situation:

[0059] 1) When the electricity generated by wind / solar power generation is sufficient and exceeds the requirements of the above-mentioned process devices: that is, when the water electrolysis hydrogen production, air separation nitrogen production process, ammonia synthesis process and other processes are operating normally, the excess wind / solar power generation energy is stored in batteries and hydrogen and nitrogen are stored;

[0060] 2) When the electricity generated by wind / solar power generation cannot simultaneously meet the normal operation of water electrolysis hydrogen production, air separation nitrogen production process, ammonia synthesis process, etc., battery energy storage can be used to supplement electricity. The power supply center can provide stable electricity to the air separation nitrogen production process and ammonia synthesis process, and use the stored hydrogen to ensure the normal operation of the ammonia synthesis process;

[0061] 3) When the electricity generated by wind / solar power generation cannot simultaneously meet the normal operation of water electrolysis hydrogen production, air separation nitrogen production process, ammonia synthesis process, etc., the battery energy storage is first used to supplement the electricity and then the stored hydrogen is burned by the gas turbine unit to ensure that the power supply center can provide stable electricity to the ammonia synthesis process and use the stored hydrogen and nitrogen to ensure the normal operation of the ammonia synthesis process;

[0062] 4) When the electricity generated by wind / solar power generation cannot simultaneously meet the normal operation of water electrolysis hydrogen production, air separation nitrogen production process, ammonia synthesis process, etc., a gas turbine unit is used to burn ammonia to generate electricity, and the stored hydrogen and nitrogen are used to maintain the ammonia synthesis process at the minimum load condition to avoid process shutdown;

[0063] As an electricity integration center, the power supply center provides stable electricity to the air separation nitrogen production process, ammonia synthesis process, etc.

[0064] In this embodiment, the system is designed to operate off-grid using wind / solar power, supplemented by battery energy storage and hydrogen / ammonia fuel gas turbines, which can provide more stable electricity and make the overall process more economical and efficient.

[0065] Embodiment 2:

[0066] The present application also provides a method for preparing ammonia using off-grid green electricity, comprising:

[0067] Obtaining generated power data corresponding to the power generated by the off-grid green power supply subsystem;

[0068] Determine whether the generated electric energy data can simultaneously meet the normal operation of the hydrogen production process of the hydrogen supply subsystem, the air separation nitrogen production process of the air separation nitrogen production subsystem, and the ammonia synthesis process of the ammonia synthesis subsystem; normal operation indicates that the operating indicators of the process within the preset time are within the preset range;

[0069] In the case where the generated power data cannot simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem, it is determined whether the generated power data can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem;

[0070] In the case where the generated power data cannot satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, it is determined whether the sum of the generated power data and the stored power data corresponding to the power stored in the off-grid green power supply subsystem can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem;

[0071] In the case where the sum of the generated power data and the stored power data cannot satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, it is determined whether the hydrogen stored in the hydrogen supply subsystem can simultaneously satisfy the supply of hydrogen to the ammonia synthesis subsystem and the power generation subsystem to achieve the normal operation of the ammonia synthesis process;

[0072] When the hydrogen stored in the hydrogen supply subsystem can provide hydrogen for both the ammonia synthesis subsystem and the power generation subsystem, the electric energy generated and stored in the off-grid green electricity supply subsystem is provided to the power supply center, and the hydrogen stored in the hydrogen supply subsystem is provided to the power generation subsystem, so that the power generation subsystem generates electric energy and provides the generated electric energy to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem, and the hydrogen stored in the hydrogen supply subsystem and the nitrogen stored in the air separation nitrogen production subsystem are provided to the ammonia synthesis subsystem, so that the ammonia synthesis process of the ammonia synthesis subsystem operates normally.

[0073] In an optional embodiment, the method further includes:

[0074] When the sum of the generated electric energy data and the stored electric energy data can meet the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem, and when the electric energy provided by the power supply center exceeds the electric energy required by the ammonia synthesis subsystem, the remaining electric energy is provided to the air separation nitrogen production subsystem, so that the air separation nitrogen production subsystem produces nitrogen through the air separation nitrogen production process, and the hydrogen stored in the hydrogen supply subsystem and the nitrogen produced and / or stored in the air separation nitrogen production subsystem are provided to the ammonia synthesis subsystem, so that the ammonia synthesis process operates normally.

[0075] In an optional embodiment, the method further includes:

[0076] In the case that the hydrogen stored in the hydrogen supply subsystem cannot simultaneously meet the needs of providing hydrogen for the ammonia synthesis subsystem and the power generation subsystem, the electric energy generated and stored by the off-grid green power supply subsystem is provided to the power supply center, and the ammonia synthesis subsystem is used to provide ammonia for the power generation subsystem, so that the power generation subsystem generates electric energy and provides it to the power supply center, and then the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem, thereby realizing the use of hydrogen stored in the hydrogen supply subsystem and nitrogen stored in the air separation nitrogen production subsystem to provide gas for the ammonia synthesis subsystem, so that the ammonia synthesis process of the ammonia synthesis subsystem operates at minimum load conditions.

[0077] In an optional embodiment, the method further includes:

[0078] Under the condition that the generated power data can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, it is judged whether the sum of the generated power data and the stored power data can satisfy the normal operation of the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem at the same time;

[0079] When the sum of the generated electric energy data and the stored electric energy data can simultaneously meet the normal operation of the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem and the air separation nitrogen production subsystem, and provides the hydrogen stored in the hydrogen supply subsystem and the nitrogen generated by the air separation nitrogen production subsystem to the ammonia synthesis subsystem, so that the ammonia synthesis process can operate normally.

[0080] In an optional embodiment, the method further includes:

[0081] When the sum of the generated electric energy data and the stored electric energy data cannot simultaneously meet the normal operation of the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem shall be provided to the power supply center, so that the power supply center can integrate the electric energy and provide the integrated electric energy to the ammonia synthesis subsystem first, and provide the remaining electric energy to the air separation nitrogen production subsystem when the electricity demand of the ammonia synthesis subsystem is met, so that the air separation nitrogen production subsystem produces nitrogen, and the hydrogen stored in the hydrogen supply subsystem and the nitrogen generated and stored in the air separation nitrogen production subsystem shall be provided to the ammonia synthesis subsystem, so that the ammonia synthesis process can operate normally.

[0082] In an optional embodiment, the method further includes:

[0083] Under the condition that the generated electric energy data can simultaneously meet the normal operation of the hydrogen production process of the hydrogen supply subsystem, the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem, the off-grid green electricity supply subsystem provides electric energy for the hydrogen supply subsystem, and provides electric energy for the air separation nitrogen production subsystem and the ammonia synthesis subsystem through the power supply center, so that the hydrogen supply subsystem generates hydrogen through the hydrogen production process and the air separation nitrogen production subsystem generates nitrogen through the air separation nitrogen production process and provides them to the ammonia synthesis subsystem to realize the ammonia synthesis process;

[0084] Determine whether there is redundant power;

[0085] In the presence of redundant electric energy, a portion of the redundant electric energy is stored in the off-grid green electricity supply subsystem, and another portion of the redundant electric energy is used to provide electric energy for the hydrogen supply subsystem and the air separation nitrogen production subsystem, so that the hydrogen supply subsystem and the air separation nitrogen production subsystem can produce gas for storage.

[0086] It should be noted that the above method embodiment and the system embodiment described in Example 1 belong to the same concept and correspond to each other. Therefore, the implementation method in Example 1 is also applicable to this embodiment and will not be repeated here.

[0087] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An ammonia production system using off-grid green electricity, characterized in that: It includes off-grid green electricity supply subsystem, hydrogen supply subsystem, air separation nitrogen production subsystem, power generation subsystem, power supply center and ammonia synthesis subsystem; The off-grid green electricity supply subsystem is electrically connected to the hydrogen supply subsystem and the power supply center respectively, and is used to provide electrical energy to the hydrogen supply subsystem and the power supply center; The hydrogen supply subsystem is connected to the power generation subsystem and the ammonia synthesis subsystem respectively, and is used to provide hydrogen to the power generation subsystem and the ammonia synthesis subsystem; The air separation nitrogen production subsystem is connected to the power supply center and the ammonia synthesis subsystem respectively, and is used to provide nitrogen for the ammonia synthesis subsystem; The power generation subsystem, the power supply center and the ammonia synthesis subsystem are connected in pairs. The power generation subsystem is used to provide electric energy to the power supply center, the power supply center is used to integrate electric energy and provide the integrated electric energy to the ammonia synthesis subsystem and the air separation nitrogen production subsystem, and the ammonia synthesis subsystem is used to provide ammonia to the power generation subsystem.

2. The ammonia production system using off-grid green electricity according to claim 1, characterized in that: The hydrogen supply subsystem includes hydrogen production equipment and hydrogen storage equipment; The off-grid green electricity supply subsystem is electrically connected to the hydrogen production equipment for providing electrical energy to the hydrogen production equipment. The hydrogen production equipment is connected to the hydrogen storage equipment for providing hydrogen to the hydrogen storage equipment. The hydrogen storage equipment is respectively connected to the ammonia synthesis subsystem and the power generation subsystem for providing hydrogen to the ammonia synthesis subsystem and the power generation subsystem.

3. The ammonia production system using off-grid green electricity according to claim 1, characterized in that: The air separation nitrogen production subsystem includes nitrogen production equipment and nitrogen storage equipment; The nitrogen production equipment is respectively connected to the power supply center, the ammonia synthesis subsystem and the nitrogen storage equipment, and is used to receive the electric energy provided by the power supply center to realize the operation of the air separation nitrogen production process, and is used to provide nitrogen to the ammonia synthesis subsystem and the nitrogen storage equipment. The nitrogen storage equipment is connected to the ammonia synthesis subsystem and is used to provide nitrogen to the ammonia synthesis subsystem.

4. The ammonia production system using off-grid green electricity according to any one of claims 1 to 3, characterized in that: The off-grid green electricity supply subsystem includes off-grid green electricity and electricity storage equipment; The off-grid green electricity is electrically connected to the hydrogen supply subsystem, the power supply center and the power storage device respectively, and is used to provide electrical energy to the hydrogen supply subsystem, the power supply center and the power storage device; The power storage device is electrically connected to the power supply center and is used to provide electric energy to the power supply center.

5. The ammonia production system using off-grid green electricity according to claim 4, characterized in that: The off-grid green electricity is off-grid wind / solar power generation.

6. A method for preparing ammonia using off-grid green electricity, applied to the system for preparing ammonia using off-grid green electricity as claimed in any one of claims 1 to 5, characterized in that: include: Acquire generated electric energy data corresponding to the electric energy generated by the off-grid green electricity supply subsystem; Determine whether the generated electric energy data can simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the air separation nitrogen production process of the air separation nitrogen production subsystem, and the ammonia synthesis process of the ammonia synthesis subsystem; the normal operation indicates that the operation index of the process within the preset time is within a preset range; In the case where the generated power data cannot simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the air separation nitrogen production process of the air separation nitrogen production subsystem, and the ammonia synthesis process of the ammonia synthesis subsystem, determining whether the generated power data can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem; In the case where the generated power data cannot satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, determining whether the sum of the generated power data and the stored power data corresponding to the power stored in the off-grid green electricity supply subsystem can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem; In the case where the sum of the generated electric energy data and the stored electric energy data cannot satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, determining whether the hydrogen stored in the hydrogen supply subsystem can simultaneously satisfy the requirement of providing hydrogen for the ammonia synthesis subsystem and the power generation subsystem to realize the normal operation of the ammonia synthesis process; In the case that the hydrogen stored in the hydrogen supply subsystem can simultaneously provide hydrogen for the ammonia synthesis subsystem and the power generation subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, and the hydrogen stored in the hydrogen supply subsystem is provided to the power generation subsystem, so that the power generation subsystem generates electric energy and provides the generated electric energy to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem, and the hydrogen stored in the hydrogen supply subsystem and the nitrogen stored in the air separation nitrogen production subsystem are provided to the ammonia synthesis subsystem, so that the ammonia synthesis process of the ammonia synthesis subsystem operates normally.

7. The method for preparing ammonia using off-grid green electricity according to claim 6, characterized in that: Also includes: When the sum of the generated electric energy data and the stored electric energy data can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, the electric energy generated and the stored electric energy of the off-grid green electricity supply subsystem are provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem, and when the electric energy provided by the power supply center exceeds the electric energy required by the ammonia synthesis subsystem, the remaining electric energy is provided to the air separation nitrogen production subsystem, so that the air separation nitrogen production subsystem produces nitrogen through the air separation nitrogen production process, and the hydrogen stored in the hydrogen supply subsystem and the nitrogen produced and / or stored in the air separation nitrogen production subsystem are provided to the ammonia synthesis subsystem, so that the ammonia synthesis process can operate normally.

8. The method for preparing ammonia using off-grid green electricity according to claim 7, characterized in that: Also includes: In the case that the hydrogen stored in the hydrogen supply subsystem cannot simultaneously satisfy the need to provide hydrogen for the ammonia synthesis subsystem and the power generation subsystem, the electric energy generated and stored by the off-grid green electricity supply subsystem is provided to the power supply center, and the ammonia synthesis subsystem is utilized to provide ammonia for the power generation subsystem, so that the power generation subsystem generates electric energy and provides it to the power supply center, and then the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem, thereby realizing the use of the hydrogen stored in the hydrogen supply subsystem and the nitrogen stored in the air separation nitrogen production subsystem to provide gas for the ammonia synthesis subsystem, so that the ammonia synthesis process of the ammonia synthesis subsystem operates at the minimum load condition.

9. The method for preparing ammonia using off-grid green electricity according to claim 6, characterized in that: Also includes: In the case where the generated power data can satisfy the normal operation of the ammonia synthesis process of the ammonia synthesis subsystem, determining whether the sum of the generated power data and the stored power data can simultaneously satisfy the normal operation of the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem; When the sum of the generated electric energy data and the stored electric energy data can simultaneously meet the normal operation of the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem, the electric energy generated and the stored electric energy of the off-grid green electricity supply subsystem are provided to the power supply center, so that the power supply center integrates the electric energy and provides the integrated electric energy to the ammonia synthesis subsystem and the air separation nitrogen production subsystem, and provides the hydrogen stored in the hydrogen supply subsystem and the nitrogen generated by the air separation nitrogen production subsystem to the ammonia synthesis subsystem, so that the ammonia synthesis process can operate normally.

10. The method for preparing ammonia using off-grid green electricity according to any one of claims 6 to 9, characterized in that: Also includes: In the case where the generated electric energy data can simultaneously satisfy the normal operation of the hydrogen production process of the hydrogen supply subsystem, the air separation nitrogen production process of the air separation nitrogen production subsystem and the ammonia synthesis process of the ammonia synthesis subsystem, the off-grid green electricity supply subsystem provides electric energy for the hydrogen supply subsystem, and provides electric energy for the air separation nitrogen production subsystem and the ammonia synthesis subsystem through the power supply center, so that the hydrogen supply subsystem generates hydrogen through the hydrogen production process and the air separation nitrogen production subsystem generates nitrogen through the air separation nitrogen production process and provides the nitrogen to the ammonia synthesis subsystem to realize the ammonia synthesis process; Determine whether there is redundant power; In the presence of the redundant electric energy, a portion of the redundant electric energy is stored in the off-grid green electricity supply subsystem, and another portion of the redundant electric energy is used to provide electric energy to the hydrogen supply subsystem and the air separation nitrogen production subsystem, so that the hydrogen supply subsystem and the air separation nitrogen production subsystem can produce gas for storage.

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