New energy electrolytic hydrogen production and adsorption air separation green ammonia production co-combustion system and method
Through the electrolytic hydrogen production and adsorption air-divided ingredient ammonia blending system, the high carbon emission problem generated by fossil coal combustion is solved, the production and application of green ammonia gas is realized, and the carbon emissions of coal-fired generator sets are significantly reduced.
Patent Information
- Application Number
- CN202411723933.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-02-25
AI Technical Summary
The combustion of fossil coal produces a large amount of carbon emissions in coal-fired generator sets, and an effective technology to reduce carbon emissions is needed.
New energy electrolytic hydrogen production and adsorption air separation and ingredient ammonia blending system are adopted. The system includes a new energy power generation device, an electrolytic hydrogen production device, an air separation device, an ammonia synthetic device and a two-fire combustion device. It uses electrolytic water to produce hydrogen, air separation and synthesis ammonia gas, combined with oxygen-rich combustion and ingredient ammonia blending to replace fossil coal combustion.
The ammonia produced is green fuel, which can replace fossil coal consumption, significantly reduce the carbon emissions generated during power generation of coal-fired generator sets, and is highly ease of use and practical.
Smart Images
Figure CN119508806A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of carbon reduction of coal-fired units, and specifically to a system and method for the co-firing of new energy electrolytic hydrogen production and adsorption air separation green ammonia production. Background Art
[0002] Photovoltaic and wind power are important green energy sources and are currently important energy sources that replace non-fossil energy. In the process of generating electricity from coal-fired power generation units, fossil coal is burned to generate heat.
[0003] However, the combustion of fossil coal produces a large amount of carbon emissions. Therefore, how to reduce the carbon emissions produced during the power generation process of coal-fired power generation units has become an unresolved issue. Summary of the Invention
[0004] The purpose of this application is to provide a new energy electrolytic hydrogen production and adsorption air separation green ammonia production co-combustion system and method, which can solve the problem of large carbon emissions generated by fossil coal combustion in the existing technology.
[0005] In a first aspect, an embodiment of the present application provides a new energy electrolysis hydrogen production and adsorption air separation green ammonia production co-combustion system, the system comprising: New energy power generation device for generating electrical energy; Water electrolysis hydrogen production device, used to produce H2 and O2 based on water and electricity generated by new energy power generation device; Air separation unit, used to separate air based on electricity generated by renewable energy power generation device to obtain nitrogen; Ammonia synthesis unit, used to synthesize ammonia based on H2 produced by water electrolysis hydrogen production unit and N2 separated by air separation unit; The first furnace combustion device is used to mix and burn the remaining air after the air separation unit separates the N2; The second furnace combustion device is used for co-firing of green ammonia produced by the synthetic ammonia unit.
[0006] In a possible embodiment of the first aspect, the chemical equation for generating H2 and O2 by the water electrolysis hydrogen production device is as follows:
[0007] Among them, the reactants for hydrogen production by water electrolysis are , the product is and , the reaction condition is power on.
[0008] In a possible implementation of the first aspect, the chemical equation for synthesizing ammonia is as follows:
[0009] Among them, the reactants for synthesizing ammonia are and , the product is .
[0010] In a possible implementation manner of the first aspect, the system further includes a water supply device, which is used to supply water to the water electrolysis hydrogen production device.
[0011] In a possible implementation of the first aspect, the air separation unit is an adsorption air separation unit.
[0012] In a possible implementation of the first aspect, the system further includes: a pressurizing device and a gas synthesis device; the pressurizing device is used to pressurize the reactants of the gas synthesis; and the gas synthesis device is used to synthesize ammonia.
[0013] In a possible implementation of the first aspect, the system further includes: a gas separation device and a gas distillation device; the gas separation device is used to separate the ammonia before selling; and the gas distillation device is used to distill the ammonia before selling.
[0014] In a possible implementation manner of the first aspect, the system further includes an oxygen content detection device, which is used to detect the oxygen content in the air separated by the air separation device.
[0015] In a possible implementation manner of the first aspect, the system further includes a purity detection device, which is used to detect the purity of the ammonia gas.
[0016] In a second aspect, an embodiment of the present application provides a method for co-combustion of hydrogen production by electrolysis of new energy and green ammonia production by adsorption air separation, which is implemented based on the system for co-combustion of hydrogen production by electrolysis of new energy and green ammonia production by adsorption air separation according to any one of the first aspects, and the method comprises: Generate electricity based on new energy generation devices; Based on the water electrolysis hydrogen production device, water and electricity generated by the new energy power generation device are used to produce H2 and O2, and based on the air separation unit, electricity generated by the new energy power generation device is used to separate air to produce N2; Based on the ammonia synthesis unit, ammonia is synthesized by using H2 produced by the water electrolysis hydrogen production unit and N2 separated by the air separation unit; Based on the first furnace combustion device, the remaining air after the air separation device separates the N2 is used for co-combustion, and based on the second furnace combustion device, the green ammonia produced by the synthetic ammonia device is used for co-combustion.
[0017] The new energy power generation device in the present application solution generates electric energy, the water electrolysis hydrogen production device generates H2 and O2 based on water and the electric energy generated by the new energy power generation device, the air separation device separates air based on the electric energy generated by the new energy power generation device to obtain N2, the ammonia synthesis device synthesizes ammonia based on the H2 generated by the water electrolysis hydrogen production device and the N2 separated by the air separation device, the first furnace combustion device performs co-combustion based on the air remaining after part of the N2 is separated by the air separation device, and the second furnace combustion device performs co-combustion based on the green ammonia produced by the ammonia synthesis device.
[0018] The ammonia produced by the present application is a green fuel that can replace fossil coal consumption, reduce carbon emissions generated during the power generation process of coal-fired power generation units, and has strong ease of use and practicality.
[0019] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0021] Figure 1 This is a structural diagram of a new energy electrolysis hydrogen production and adsorption air separation green ammonia production co-combustion system provided in an embodiment of the present application; Figure 2 This is a schematic diagram of the steps of the method for producing hydrogen through electrolysis of new energy and producing green ammonia through adsorption air separation, provided in an embodiment of the present application. DETAILED DESCRIPTION
[0022] In the following description, specific details such as specific system structures and technologies are provided for illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obstructing the description of the present application with unnecessary details.
[0023] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or photovoltaic components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, photovoltaic components and / or groups thereof.
[0024] It should also be understood that the terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.
[0025] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
[0026] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.
[0027] In addition, in the description of the present application, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0028] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in some other embodiments," and "in some other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0029] Photovoltaic and wind power are important green energy sources and are currently important energy sources that replace non-fossil energy. In the process of generating electricity from coal-fired power generation units, fossil coal is burned to generate heat.
[0030] However, the combustion of fossil coal produces a large amount of carbon emissions. Therefore, how to reduce the carbon emissions produced during the power generation process of coal-fired power generation units has become an unresolved issue.
[0031] Photovoltaic power generation faces the main problem of not being able to be fully absorbed. The main reasons include: imbalance between electricity supply and demand (the maximum output period of distributed photovoltaic power is at noon, while the maximum demand for electricity load is usually in the evening, making it difficult to immediately absorb photovoltaic power on site), insufficient distribution network capacity (the design and operation of traditional distribution networks are based on the "one-way power supply" principle, while distributed photovoltaic power needs to be directly connected to the distribution network to form a two-way flow of electricity) and the lack of an effective trading mechanism.
[0032] First, wind power generation is characterized by intermittent, fluctuating, and random characteristics, making forecasting and scheduling extremely difficult. Second, a mismatch between grid and peak-shaving power generation management and power generation construction is also a significant obstacle to the absorption of wind power. In the "Three Norths" region, insufficient grid and peak-shaving power generation capacity hinders the timely transmission and absorption of wind power, leading to severe wind curtailment. Imperfect policies and market mechanisms also play a significant role in hindering the absorption of wind power.
[0033] In response to the above-mentioned defects, an embodiment of the present application provides a system for co-firing new energy electrolysis hydrogen production and adsorption air separation green ammonia production, wherein the new energy power generation device generates electricity, the water electrolysis hydrogen production device generates H2 and O2 based on water and the electricity generated by the new energy power generation device, the air separation device separates air based on the electricity generated by the new energy power generation device to obtain N2, the ammonia synthesis device synthesizes ammonia based on the H2 generated by the water electrolysis hydrogen production device and the N2 separated by the air separation device, the first furnace combustion device co-firing the remaining air after part of the N2 is separated by the air separation device, and the second furnace combustion device co-firing the green ammonia produced by the ammonia synthesis device.
[0034] The ammonia produced by the present application is a green fuel that can replace fossil coal consumption, reduce carbon emissions generated during the power generation process of coal-fired power generation units, and has strong ease of use and practicality.
[0035] The specific process implemented in this application is introduced below through specific embodiments.
[0036] See Figure 1 , Figure 1 This is a schematic diagram of the structure of the new energy electrolysis hydrogen production and adsorption air separation green ammonia production system provided in the embodiment of the present application. Figure 1 As shown, the system includes: The new energy power generation device is used to generate electricity, the water electrolysis hydrogen production device is used to generate H2 and O2 based on water and the electricity generated by the new energy power generation device, and the air separation device is used to separate air based on the electricity generated by the new energy power generation device to obtain N2.
[0037] The ammonia synthesis unit is used to synthesize ammonia using H2 produced by the water electrolysis unit and N2 separated by the air separation unit. The first furnace combustion unit is used to co-combust the remaining oxygen-enriched air after the air separation unit separates some N2, while the second furnace combustion unit is used to co-combust the green ammonia produced by the ammonia synthesis unit.
[0038] In some embodiments, a portion of renewable energy electricity is used to electrolyze water to produce hydrogen and oxygen, while the remaining portion is fed to an adsorption air separation unit to separate nitrogen from the air and synthesize ammonia with the electrolytic hydrogen. The remaining gas after air separation (air with a high oxygen content, or oxygen-enriched air) is an ideal material for oxygen-enriched combustion in coal-fired power plants. Oxygen-enriched combustion improves boiler efficiency, meeting low-load combustion requirements and carbon reduction requirements. Green ammonia is then blended or sold, replacing ammonia used for denitrification.
[0039] According to one embodiment of the present application, the chemical equation for generating H2 and O2 by the water electrolysis hydrogen production device is as follows:
[0040] Among them, the reactants for hydrogen production by water electrolysis are , the product is and , the reaction condition is power on.
[0041] According to one embodiment of the present application, the chemical formula for synthesizing ammonia is as follows:
[0042] Among them, the reactants for synthesizing ammonia are and , the product is .
[0043] According to one embodiment of the present application, the system further includes a water supply device, which is used to supply water to the water electrolysis hydrogen production device.
[0044] According to one embodiment of the present application, the air separation unit is an adsorption air separation unit.
[0045] According to one embodiment of the present application, the system further comprises: a pressurizing device and a gas synthesis device. The pressurizing device is used to pressurize the reactants for gas synthesis, and the gas synthesis device is used to synthesize ammonia.
[0046] According to one embodiment of the present application, the system further comprises: a gas separation device and a gas rectification device. The gas separation device is used to separate the ammonia gas before selling, and the gas rectification device is used to rectify the ammonia gas before selling.
[0047] According to one embodiment of the present application, the system further includes an oxygen content detection device, which is used to detect the oxygen content in the air after separation by the air separation device.
[0048] According to one embodiment of the present application, the system further includes a purity detection device, which is used to detect the purity of ammonia.
[0049] See Figure 2 , Figure 2 This is a schematic diagram of the steps of the method for producing hydrogen by electrolysis of new energy and producing green ammonia by adsorption air separation provided in an embodiment of the present application. The method is implemented based on a system for producing hydrogen by electrolysis of new energy and producing green ammonia by adsorption air separation, and the method includes the following steps: S201, generating electric energy based on a new energy power generation device.
[0050] S202, based on the water electrolysis hydrogen production device, uses water and the electricity generated by the new energy power generation device to produce H2 and O2, and based on the air separation device, uses the electricity generated by the new energy power generation device to separate the air to obtain N2.
[0051] S203, based on the ammonia synthesis unit, uses the H2 produced by the water electrolysis hydrogen production unit and the N2 separated by the air separation unit to synthesize ammonia.
[0052] S204, based on the first furnace combustion device, the remaining air after the air separation device separates the N2 is used for co-combustion, and based on the second furnace combustion device, the green ammonia produced by the synthetic ammonia device is used for co-combustion.
[0053] It should be noted that the specific implementation principle of this embodiment has been described in the above embodiments and will not be repeated here.
[0054] The new energy power generation device in the present application solution generates electric energy, the water electrolysis hydrogen production device generates H2 and O2 based on water and the electric energy generated by the new energy power generation device, the air separation device separates air based on the electric energy generated by the new energy power generation device to obtain N2, the ammonia synthesis device synthesizes ammonia based on the H2 generated by the water electrolysis hydrogen production device and the N2 separated by the air separation device, the first furnace combustion device is based on the oxygen-rich air remaining after part of the N2 is separated by the air separation device, and the second furnace combustion device is based on the green ammonia produced by the ammonia synthesis device.
[0055] The ammonia produced by the present application is a green fuel that can replace fossil coal consumption, reduce carbon emissions generated during the power generation process of coal-fired power generation units, and has strong ease of use and practicality.
[0056] In addition, this application plan addresses the problem that electricity generated by new energy cannot be consumed in a timely manner, and the transportation and use of hydrogen cannot be carried out on a large scale at present, resulting in idle waste caused by insufficient annual operating hours of new energy. It can consume and transform electricity generated by wind power or photovoltaic (solar thermal) power in a larger area to form green energy ammonia.
[0057] This application scheme enables the conversion of electricity generated by renewable energy, allowing new energy power generation equipment to operate at full load, replacing fossil coal consumption and achieving carbon reduction effects; it solves the low-load peak-shaving needs of coal-fired power units, improves boiler efficiency, and achieves energy-saving effects; it enriches the product variety of new energy and meets market demand; it is also suitable for the implementation of wind and solar power complementary transformation of coal-fired power units.
[0058] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0059] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the scope of protection of the present application.
Claims
1. A new energy electrolysis hydrogen production and adsorption air separation green ammonia production system, characterized in that: The system comprises: New energy power generation device for generating electrical energy; A water electrolysis hydrogen production device, used to produce H2 and O2 based on water and the electricity generated by the new energy power generation device; An air separation unit, used to separate air based on the electricity generated by the new energy power generation device to obtain N2; An ammonia synthesis device, used to synthesize ammonia based on the H2 produced by the water electrolysis hydrogen production device and the N2 separated by the air separation device; A first furnace combustion device is used for oxygen-blending combustion based on the remaining air after the air separation device separates the N2; The second furnace combustion device is used for co-firing green ammonia produced by the synthetic ammonia device.
2. The new energy electrolysis hydrogen production and adsorption air separation green ammonia production system according to claim 1 is characterized in that: The chemical equation for producing H2 and O2 by the water electrolysis hydrogen production device is as follows: The reactants for hydrogen production by water electrolysis are , the product is and , the reaction condition is power on.
3. The new energy electrolysis hydrogen production and adsorption air separation green ammonia production system according to claim 1 is characterized in that: The chemical formula for synthesizing ammonia is as follows: The reactants for synthesizing ammonia are: and , the product is .
4. The new energy electrolysis hydrogen production and adsorption air separation green ammonia production system according to claim 1 is characterized in that: The system also includes a water supply device, which is used to supply water to the water electrolysis hydrogen production device.
5. The new energy electrolysis hydrogen production and adsorption air separation green ammonia production system according to claim 1 is characterized in that: The air separation device is an adsorption air separation device.
6. The new energy electrolysis hydrogen production and adsorption air separation green ammonia production system according to any one of claims 1-5, characterized in that: The system also includes: a pressurizing device and a gas synthesis device; The pressurizing device is used to pressurize the reactants for gas synthesis; and the gas synthesis device is used to synthesize ammonia.
7. The new energy electrolysis hydrogen production and adsorption air separation green ammonia production system according to claim 5 is characterized in that: The system also includes: a gas separation device and a gas rectification device; The gas separation device is used to separate ammonia gas before selling; the gas distillation device is used to distill ammonia gas before selling.
8. The new energy electrolysis hydrogen production and adsorption air separation green ammonia production system according to claim 1 is characterized in that: The system also includes an oxygen content detection device, which is used to detect the oxygen content in the air separated by the air separation device.
9. The new energy electrolysis hydrogen production and adsorption air separation green ammonia production co-combustion system according to claim 1 or 8, characterized in that: The system also includes a purity detection device, which is used to detect the purity of ammonia.
10. A method for producing hydrogen by electrolysis of new energy and producing green ammonia by adsorption air separation, characterized in that: The method is realized based on the new energy electrolysis hydrogen production and adsorption air separation green ammonia production mixed combustion system according to any one of claims 1 to 9, and comprises: Produce electricity based on new energy generation devices; Based on the water electrolysis hydrogen production device, water and the electricity generated by the new energy power generation device are used to produce H2 and O2, and based on the air separation device, the electricity generated by the new energy power generation device is used to separate air to obtain N2; Based on the ammonia synthesis device, ammonia is synthesized by using the H2 produced by the water electrolysis hydrogen production device and the N2 separated by the air separation device; Based on the first furnace combustion device, the remaining air after the air separation device separates N2 is used for co-combustion, and based on the second furnace combustion device, the green ammonia produced by the synthetic ammonia device is used for co-combustion.