Hydrogen supplement method and system for coke oven gas tank

Abstract

The application discloses a hydrogen supplement method and system for a coke oven gas tank, and the method comprises the following steps: controlling power generation equipment arranged on the outer facade of the coke oven gas tank to recover green energy on the outer facade of the coke oven gas tank to generate power and obtain a power supply; controlling an electrolytic water equipment to prepare hydrogen under the action of the power supply; and controlling a hydrogen recovery equipment to directly transport the hydrogen prepared by the electrolytic water equipment into the coke oven gas tank so as to directly mix the hydrogen with coke oven gas in the coke oven gas tank.

Description

Technical Field

[0001] This invention relates to coke oven gas holders, and more particularly to a method and system for replenishing hydrogen in coke oven gas holders. Background Technology

[0002] Coke oven gas holders are key facilities for storing coke oven gas, a byproduct of coke oven production. They are typically cylindrical structures with a semi-circular, curved top plate. Their volume is generally over 150,000 cubic meters (m³). Taking a typical coke oven gas holder as an example, it is about 100 meters high, with a bottom plate diameter of about 54 meters, and has a side plate area of ​​about 17,000 square meters and a top plate area of ​​2,300 square meters.

[0003] In conventional applications, coke oven gas needs to be purified before being stored in a gas holder and then transported to users through pipelines. Its core function is to balance the difference between coke oven gas production and user consumption, thereby achieving storage and regulation functions.

[0004] The coke oven gas stored in the coke oven gas holder is a mixture of various gases, including hydrogen (H2), methane (CH4), unsaturated hydrocarbons (ethylene, propylene, etc.), carbon monoxide (CO), inert gases, and impurities. Hydrogen (H2) constitutes the largest proportion, typically 55%-60%, and is the main combustible component of the coke oven gas. Methane (CH4) is the next most abundant, approximately 23%-27%, and is also an important combustible gas. Unsaturated hydrocarbons mainly include ethylene (C2H4) and propylene (C3H6), accounting for approximately 2%-4% of the total. Carbon monoxide (CO) accounts for approximately 5%-8%, and its content is controlled by a purification system before entering the holder to ensure leak-free transport and storage. Inert gases and impurities account for approximately 3%-5% of the total, mainly including nitrogen (N2, 2%-4%) and carbon dioxide (CO2, 1%-2%). These are non-flammable and mainly originate from the composition of coal and the coke oven combustion process, but do not affect normal combustion and use. The mixing ratio of these gases has a significant impact on the combustion efficiency of coke oven gas.

[0005] In actual production and operation, coke oven gas is supplied to downstream users through the main coke oven gas pipeline. When the consumption of downstream users suddenly increases dramatically, it is necessary to replenish the coke oven gas holders with coke oven gas; otherwise, the amount of coke oven gas stored in the holders will be insufficient to meet the supply demand.

[0006] However, the existing methods for supplementing coke oven gas are relatively simple, relying on the main coke oven gas pipeline for one-way supplementation without other supplementation pathways. The hydrogen content in the supplemented coke oven gas is easily affected by fluctuations in coke oven production or changes in coal type, which can lead to insufficient hydrogen content. This directly affects downstream combustion efficiency, restricting not only the normal production rhythm of downstream users but also hindering the efficient utilization of coke oven gas resources, becoming a core pain point that the coking industry urgently needs to overcome. Summary of the Invention

[0007] To address or partially resolve the technical problem of insufficient hydrogen replenishment in coke oven gas holders, which can negatively impact combustion efficiency, this invention provides a method and system for hydrogen replenishment in coke oven gas holders. When a hydrogen replenishment requirement arises in the coke oven gas holder, a power generation device installed on the exterior of the gas holder recovers green energy from the exterior to generate electricity, providing a power source. An electrolysis device is then used to produce hydrogen under the influence of this power source. The hydrogen produced by the electrolysis is then directly mixed into the coke oven gas holder using a hydrogen recovery device. This alters the composition of the coke oven gas, improving its combustion efficiency. Consequently, the coke oven gas holder can not only maintain a stable supply when dealing with fluctuations in user demand but also enhance combustion efficiency, ensuring the efficient utilization of coke oven gas resources and laying a foundation for maintaining the production schedule of downstream users.

[0008] To address the aforementioned technical problems, a first aspect of the present invention discloses a method for hydrogen replenishment in a coke oven gas holder, the method comprising: When the coke oven gas holder has a hydrogen replenishment requirement, the power generation equipment installed on the exterior of the coke oven gas holder is controlled to recover the green energy on the exterior of the coke oven gas holder to generate electricity and obtain power supply. The water electrolysis equipment is controlled to produce hydrogen under the action of the power supply. The hydrogen recovery equipment controls the direct delivery of hydrogen produced by the water electrolysis equipment to the coke oven gas holder, so as to directly mix it with the coke oven gas in the coke oven gas holder.

[0009] Optionally, the power generation equipment installed on the exterior of the coke oven gas holder recovers the green energy from the exterior of the coke oven gas holder to generate electricity, specifically including: The wind power generation equipment installed on the top surface of the coke oven gas holder is controlled to recover the wind energy on the top surface of the coke oven gas holder to generate electricity, thereby obtaining the power supply.

[0010] Optionally, the power generation equipment installed on the exterior of the coke oven gas holder recovers the green energy from the exterior of the coke oven gas holder to generate electricity, specifically including: The solar power generation equipment installed on the top and / or side of the coke oven gas holder is controlled to recover solar energy from the top and / or side of the coke oven gas holder to generate electricity, thereby obtaining the power supply.

[0011] Optionally, the method further includes: when there is a need for equipment maintenance, controlling the power generation equipment to shut down, and using a partition device installed between the hydrogen recovery equipment and the coke oven gas holder to isolate the hydrogen supply for equipment maintenance.

[0012] A second aspect of the present invention discloses a hydrogen replenishment system for coke oven gas holders, the system comprising: Coke oven gas holder; The power generation equipment is installed on the exterior of the coke oven gas holder and is used to generate electricity by recovering the green energy on the exterior of the coke oven gas holder when the coke oven gas holder has a hydrogen replenishment requirement, thereby obtaining a power supply. An electrolysis water device for producing hydrogen gas under the action of the power supply; The hydrogen recovery equipment is directly connected to the coke oven gas holder via a pipeline, and is used to directly transport the hydrogen produced by the water electrolysis equipment to the coke oven gas holder so as to directly mix it with the coke oven gas in the coke oven gas holder.

[0013] Optionally, the power generation equipment includes: A wind power generation device is installed on the top surface of the coke oven gas holder to recover wind energy from the top surface of the coke oven gas holder for power generation, thereby obtaining the power supply.

[0014] Optionally, the wind power generation equipment is installed on the frame on the top surface of the coke oven gas holder.

[0015] Optionally, the power generation equipment further includes: A solar power generation device is installed on the top and / or side of the coke oven gas holder to recover solar energy from the top and / or side of the coke oven gas holder to generate electricity and obtain the power supply.

[0016] Optionally, solar power generation equipment is installed on the top and / or side frame of the coke oven gas holder.

[0017] Optionally, the system further includes: An isolation device, installed between the hydrogen recovery equipment and the coke oven gas holder, is used to isolate the hydrogen supply when there is a need for equipment maintenance and the power generation equipment is shut down, so as to carry out equipment maintenance.

[0018] Through one or more technical solutions of the present invention, the present invention has the following beneficial effects or advantages: This invention provides a method and system for hydrogen replenishment in coke oven gas holders. When a coke oven gas holder requires hydrogen replenishment, a power generation device installed on the exterior of the gas holder recovers the green energy from the exterior to generate electricity, providing a power source. An electrolysis device is then controlled to produce hydrogen under the power source, and the hydrogen produced by the electrolysis is directly mixed into the coke oven gas holder using a hydrogen recovery device. This alters the composition of the coke oven gas, improving its combustion efficiency. This ensures that the gas holder can not only stably supply gas when dealing with fluctuations in user demand but also improve combustion efficiency, guaranteeing the efficient utilization of coke oven gas resources and laying a foundation for ensuring the production schedule of downstream users.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A flowchart of a hydrogen replenishment method for a coke oven gas holder according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of a hydrogen replenishment system for a coke oven gas holder according to an embodiment of the present invention is shown. Detailed Implementation

[0021] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0022] Firstly, in this invention, considering that the proportion of hydrogen in the coke oven gas holder has a significant impact on combustion efficiency, providing hydrogen to the coke oven gas holder can significantly improve combustion efficiency. Furthermore, considering the structural characteristics of the coke oven gas holder itself, such as its height of approximately 100 meters, the strong winds at the top year-round, the lack of surrounding obstructions, long hours of sunlight exposure, and the temperature difference between the sunlit and shady sides of the holder, which can lead to thermal expansion and contraction, causing structural changes and affecting safe operation, this invention proposes an innovative energy coupling scheme that utilizes the large-area side and top plates within its structure to develop new energy power generation for hydrogen production and replenishment in the coke oven gas holder.

[0023] like Figure 1 As shown, the hydrogen replenishment method for coke oven gas holders provided in this embodiment of the invention includes at least the following steps: S101, when the coke oven gas holder has a hydrogen replenishment requirement, the power generation equipment installed on the exterior of the coke oven gas holder is controlled to recover the green energy of the exterior of the coke oven gas holder for power generation, thereby obtaining a power supply.

[0024] Specifically, a detection device can be designed into the coke oven gas holder to detect the proportion of gas components in the gas. Examples of detection devices include online gas chromatographs and infrared gas analyzers, but this is not a limitation.

[0025] The controller is connected to the detection device to analyze the detection results in real time. When the analysis shows that the proportion of hydrogen in the coke oven gas holder has dropped to a set threshold, it indicates that the coke oven gas holder has a need for hydrogen replenishment. The controller controls the power generation equipment installed on the exterior of the coke oven gas holder to recover the green energy on the exterior of the coke oven gas holder for power generation, thereby obtaining the power supply.

[0026] Considering the structural characteristics of the coke oven gas holder, in one optional embodiment, a wind power generation device is installed on the top surface of the coke oven gas holder to recover wind energy from the top. Specifically, when the coke oven gas holder requires hydrogen replenishment, the wind power generation device installed on the top surface of the coke oven gas holder is controlled to recover wind energy from the top surface to generate electricity, thus providing green electricity for the water electrolysis equipment. In another optional embodiment, a solar power generation device can also be installed on the top surface and / or sides of the coke oven gas holder to recover solar energy. Specifically, when the coke oven gas holder requires hydrogen replenishment, the solar power generation device installed on the top surface and / or sides of the coke oven gas holder is controlled to recover solar energy from the top surface and / or sides to generate electricity, thus providing green electricity for the water electrolysis equipment. Furthermore, installing a solar power generation device on the top surface and / or sides of the coke oven gas holder can also protect the exterior facade of the gas holder, reduce its temperature difference, and ensure the safe operation of the coke oven gas holder.

[0027] The two methods described above can be used individually to generate power, or they can be used simultaneously to generate power.

[0028] For example, taking advantage of the strong winds at the top of the coke oven gas holder, a wind power generation device, such as a small wind turbine, can be installed on the top of the holder to generate green electricity using wind energy. Taking advantage of the fact that the side and top panels of the coke oven gas holder are unobstructed and receive sunlight for a long time and over a large area, solar panels can be installed on the top panel and the east, south, and west side panels of the coke oven gas holder to generate green electricity using solar energy.

[0029] S102, Control the water electrolysis equipment to produce hydrogen under the action of the power supply.

[0030] The water electrolysis equipment is designed to be located on the ground adjacent to the coke oven gas holder.

[0031] The water electrolysis equipment is connected to wind power generation equipment and / or solar power generation equipment via cables to receive power from the wind power generation equipment and / or solar power generation equipment.

[0032] Of course, in order to adapt to the voltage of the water electrolysis equipment, wind power generation equipment and / or solar power generation equipment can be connected to an external voltage converter to convert the power supply to a voltage suitable for the water electrolysis equipment.

[0033] S103, control the hydrogen recovery equipment to directly transport the hydrogen produced by the water electrolysis equipment to the coke oven gas holder so as to directly mix it with the coke oven gas in the coke oven gas holder.

[0034] Specifically, the hydrogen recovery equipment and the water electrolysis equipment are directly connected by pipelines, and the hydrogen recovery equipment and the coke oven gas holder are also directly connected by pipelines.

[0035] Considering that the coke oven gas stored in the coke oven gas holder itself contains hydrogen, and that it is necessary to increase the proportion of hydrogen to improve combustion efficiency, the proportion of hydrogen in the coke oven gas holder is not restricted. Therefore, the hydrogen recovery equipment can directly transport the hydrogen produced by the water electrolysis equipment to the coke oven gas holder, and the hydrogen produced by the water electrolysis equipment can be directly transported to the coke oven gas holder without the need for hydrogen storage equipment to control the hydrogen supply.

[0036] The supplementary hydrogen, when mixed with components such as methane and carbon monoxide in the coke oven gas, can optimize the combustion characteristics of the coke oven gas. This gas can then be delivered to downstream users as feedstock for power generation or chemical processes, providing them with higher-quality fuel and thus improving product quality or production efficiency. Furthermore, this mixing method requires no large-scale modifications to user-end equipment, offering strong compatibility and facilitating technology adoption.

[0037] Furthermore, compared to traditional hydrogen replenishment schemes, which require specialized hydrogen storage equipment such as high-pressure hydrogen storage tanks and hydrogen storage cylinder groups to control the hydrogen supply, in this invention, hydrogen is directly delivered to the coke oven gas holder, utilizing the storage space of the coke oven gas holder itself. This avoids the safety hazards of hydrogen storage and eliminates the need to control the hydrogen supply, as all the hydrogen produced by the water electrolysis equipment can be directly delivered to the coke oven gas holder.

[0038] In one alternative implementation, the controller and the isolation device are connected. When there is a need for equipment maintenance, the controller shuts down the power generation equipment and uses the isolation device located between the hydrogen recovery equipment and the coke oven gas holder to isolate the hydrogen supply for equipment maintenance.

[0039] Isolation devices typically use dual-channel shut-off valve assemblies with remote control for hydrogen supply isolation. The first valve in the dual-channel shut-off valve assembly is the main shut-off valve, used to quickly cut off the main hydrogen flow, while the second valve is a backup shut-off valve to prevent hydrogen leakage due to main valve seal failure. Alternatively, water-sealed devices can also be used for isolation, but this is not a limitation.

[0040] The technical solution of this invention, when the coke oven gas holder has a hydrogen replenishment requirement, controls the power generation equipment installed on the exterior of the coke oven gas holder to recover the green energy of the exterior of the coke oven gas holder for power generation, obtaining a power supply. The water electrolysis equipment is then controlled to produce hydrogen under the action of the power supply, and the hydrogen produced by water electrolysis is directly mixed into the coke oven gas holder using a hydrogen recovery device. This alters the composition of the coke oven gas, improves the combustion efficiency of the coke oven gas in the coke oven gas holder, and ensures that the coke oven gas holder can not only stably guarantee supply when dealing with fluctuations in user demand, but also improve combustion efficiency, ensuring the efficient utilization of coke oven gas resources and laying a solid foundation for ensuring the production rhythm of downstream users.

[0041] Based on the same invention and concept, a second aspect of the present invention discloses a hydrogen replenishment system for coke oven gas holders, see [link / reference]. Figure 2 The system includes: a coke oven gas holder 21, a control device (not shown in the figure), a power generation device, a water electrolysis device 24, a hydrogen recovery device 25, and an isolation device 26. The control device is connected to the power generation device, the water electrolysis device 24, the hydrogen recovery device 25, and the isolation device 26, and is used to control the operation of each device.

[0042] The coke oven gas holder 21, serving as the core storage and mixing container for coke oven gas, has a cylindrical structure with a semi-circular top plate that can hold a large amount of coke oven gas. Installed in a designated area within the coking plant, it is connected to the main coke oven gas pipeline. It receives coke oven gas from the main pipeline and can also supply mixed gas (containing coke oven gas and supplementary hydrogen) to the pipeline when needed. In this configuration, the coke oven gas holder 21 can be used for both routine storage and regulation of coke oven gas and as a direct mixing and storage location for hydrogen, eliminating the need for a separate hydrogen storage container, significantly simplifying the system layout and reducing costs.

[0043] The power generation equipment is installed on the exterior of the coke oven gas holder 21 and is controlled by the control equipment. It is used to recover green energy from the exterior of the coke oven gas holder 21 to generate electricity when the coke oven gas holder requires hydrogen replenishment. Specifically, the power generation equipment is connected to the exterior of the gas holder via a bracket or fixed structure, without occupying additional ground space, thus making full use of the gas holder's own three-dimensional space resources.

[0044] In one optional embodiment, the power generation equipment includes a wind power generation device 22, installed on the top surface of the coke oven gas holder 21 and controlled by the control device, for recovering wind energy from the top surface of the coke oven gas holder 21 to generate electricity, thereby obtaining the power supply. Specifically, the wind power generation device 22 can be a small or medium-sized wind turbine, installed in the center or edge area of ​​the top surface of the coke oven gas holder 21. Since the height of the gas holder is usually tens or even hundreds of meters, the wind speed on the top surface is stable and less affected by ground obstacles. Installing it on the top surface can efficiently recover wind energy from the top surface of the coke oven gas holder 21 to generate electricity, thereby obtaining the power supply.

[0045] Specifically, the top surface of the coke oven gas holder 21 is formed by adding steel plates to a frame, which serves as a support. To make the wind power generation equipment 22 more stable, the wind power generation equipment 22 is installed on the frame on the top surface of the coke oven gas holder 21, for example, by bolting or welding, and is fixed to the load-bearing frame nodes on the top surface of the coke oven gas holder 21 to ensure that it maintains structural stability under the action of high-altitude winds and avoids operational safety due to vibration or shaking.

[0046] In one optional embodiment, the power generation equipment further includes a solar power generation device 23, installed on the top and / or side surfaces of the coke oven gas holder 21, controlled by the control device, for recovering solar energy from the top and / or side surfaces of the coke oven gas holder 21 to generate electricity, thereby obtaining the power supply. Specifically, the solar power generation device 23 may employ photovoltaic panel modules, which are laid out over a large area on the top and / or side surfaces of the coke oven gas holder 21. The top surface is unobstructed and receives sunlight for a long time, while the side surfaces can receive solar energy from different angles, thus fully utilizing the solar energy from the top and / or side surfaces of the coke oven gas holder 21 to generate electricity, thereby obtaining the power supply.

[0047] Specifically, the top and sides of the coke oven gas holder 21 are formed by adding steel plates to a frame, which serves as a support. To make the solar power generation equipment 23 more stable, the solar power generation equipment 23 is installed on the top and / or side frame of the coke oven gas holder 21. Taking the solar power generation equipment 23 as an example, the photovoltaic panel modules are fixed to the top and / or side frame of the coke oven gas holder 21 at an angle by brackets. The photovoltaic panel modules on the top surface can be horizontal or slightly tilted, while the photovoltaic panel modules on the sides are installed to adapt to the curvature of the holder. The photovoltaic panels are connected in series or parallel with wires to form an array, ensuring a firm connection with the frame and resisting the effects of natural factors such as wind and rain. The advantage of this design is that it can maximize the reception of solar energy using the large exterior surface of the gas holder, the tilted installation can optimize the angle of illumination and improve power generation efficiency, and relying on the original frame support, there is no need to build an additional photovoltaic support foundation, reducing installation costs and construction difficulty.

[0048] The solar power generation device 23 and the wind power generation device 22 can be used individually or simultaneously.

[0049] The water electrolysis device 24 is designed to be located on the ground adjacent to the coke oven gas holder 21, maintaining a reasonable and safe distance from the gas holder. The water electrolysis device 24 is controlled by the aforementioned control equipment and is used to produce hydrogen under the power supply. Alternatively, the water electrolysis device 24 can be directly controlled by the power generation equipment, stopping hydrogen production when the power generation equipment is de-energized. Specifically, the water electrolysis device 24 can employ alkaline electrolysis cells, proton exchange membrane electrolysis cells, or similar equipment to decompose water into hydrogen and oxygen, producing high-purity hydrogen.

[0050] The hydrogen recovery device 25, directly connected to the coke oven gas holder 21 via a pipeline and controlled by the control equipment, is used to directly transport the hydrogen produced by the water electrolysis device 24 to the coke oven gas holder 21 for direct mixing with the coke oven gas in the holder 21. The hydrogen recovery device starts synchronously when the water electrolysis device 24 produces hydrogen and stops synchronously when the device stops producing hydrogen. The hydrogen recovery device 25 includes at least a hydrogen compressor, a drying and purification device, and a flow meter. It is directly connected to the coke oven gas holder 21 via a corrosion-resistant, high-pressure sealed pipeline. The pipeline diameter is designed according to the expected hydrogen delivery volume. After compressing, drying, and removing impurities from the hydrogen produced by the water electrolysis device 24, the hydrogen recovery device 25 directly transports it to the coke oven gas holder 21 at a set flow rate for direct mixing with the coke oven gas in the holder 21. This direct-connection delivery method eliminates the intermediate hydrogen storage stage, enabling the immediate production and delivery of hydrogen. This reduces hydrogen loss and safety risks during storage and secondary transportation, while precise control of hydrogen replenishment through metering instruments ensures stable mixed gas composition.

[0051] In addition, this system also includes: an isolation device 26, installed in the pipeline between the hydrogen recovery device 25 and the coke oven gas holder 21, controlled by the control device, used to perform hydrogen supply isolation when there is a need for equipment maintenance and the power generation equipment is shut down, so as to carry out equipment maintenance. The isolation device 26 is usually a double-channel shut-off valve group with remote control function for hydrogen supply isolation, but a water seal device can also be used, but this is not a limitation.

[0052] When maintenance is required, firstly, remotely or on-site control should be used to shut down all wind power generation equipment 22 and / or solar power generation equipment 23 on the exterior of the coke oven gas holder 21, disconnecting their power supply lines to the water electrolysis equipment 24. This ensures that the water electrolysis equipment 24 loses its energy supply, stopping hydrogen production at the source and preventing continuous hydrogen production during maintenance from causing pipeline pressure accumulation. Simultaneously, control valves on the main coke oven gas pipeline should be controlled to temporarily cut off gas flow between the gas holder and the main pipeline, preventing pressure fluctuations or gas crosstalk within the gas holder during maintenance. Control should also be applied to the double-shutdown valve group on the pipeline between the hydrogen recovery equipment 25 and the gas holder: first, close the main shut-off valve, then close the manual standby shut-off valve, forming a double isolation to block the hydrogen delivery channel from the recovery equipment to the gas holder, facilitating maintenance of each piece of equipment. This invention, by leveraging the structural characteristics of coke oven gas holders, fully utilizes their abundant local green energy resources to produce and recover green hydrogen, achieving cost and carbon reduction. It also contributes to the safe and stable operation of the coke oven gas holders. The annual benefit of recovering green hydrogen (taking a 150,000 cubic meter coke oven gas holder as an example) is approximately 10 million yuan.

[0053] Since the exterior of the coke oven gas holder was originally an unused vertical space, this invention transforms it into a green energy power generation site without occupying additional land resources within the plant area. It utilizes localized wind or solar energy from the coke oven gas holder to generate green hydrogen for internal use, setting an industry precedent. Furthermore, the power generation equipment, water electrolysis equipment, and other components are located close to the coke oven gas holder, reducing the length of pipelines and cables between equipment, lowering energy transmission losses, and reducing the difficulty of equipment operation and maintenance. Simultaneously, maintenance of each piece of equipment can be carried out using the existing structure of the gas holder (such as the top frame and side platforms) without the need for additional auxiliary facilities, further reducing daily operation and maintenance costs and indirectly increasing annual profit potential.

[0054] This invention utilizes the coordinated operation of wind and solar power generation equipment to achieve wind-solar complementarity, reducing the intermittency and volatility of single-energy power generation. This provides a more stable power supply for hydrogen production via water electrolysis, ensuring continuous hydrogen replenishment and preventing insufficient hydrogen replenishment in coke oven gas holders due to energy interruptions. It further enhances the stable gas supply capacity of the gas holders to downstream users. After the produced green hydrogen is mixed with coke oven gas, the calorific value and combustion characteristics of the gas are optimized, improving combustion efficiency. This enables downstream users in industries such as steel and chemicals to increase production efficiency, indirectly reducing their production costs and carbon emissions, and enhancing the overall green energy competitiveness of the industry.

[0055] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0056] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for hydrogen replenishment in a coke oven gas holder, characterized in that, The method includes: When the coke oven gas holder has a hydrogen replenishment requirement, the power generation equipment installed on the exterior of the coke oven gas holder is controlled to recover the green energy on the exterior of the coke oven gas holder to generate electricity and obtain power supply. The water electrolysis equipment is controlled to produce hydrogen under the action of the power supply. The hydrogen recovery equipment controls the direct delivery of hydrogen produced by the water electrolysis equipment to the coke oven gas holder, so as to directly mix it with the coke oven gas in the coke oven gas holder.

2. The method as described in claim 1, characterized in that, The power generation equipment installed on the exterior of the coke oven gas holder recovers the green energy from the exterior of the coke oven gas holder to generate electricity, specifically including: The wind power generation equipment installed on the top surface of the coke oven gas holder is controlled to recover the wind energy on the top surface of the coke oven gas holder to generate electricity, thereby obtaining the power supply.

3. The method as described in claim 1 or 2, characterized in that, The power generation equipment installed on the exterior of the coke oven gas holder recovers the green energy from the exterior of the coke oven gas holder to generate electricity, specifically including: The solar power generation equipment installed on the top and / or side of the coke oven gas holder is controlled to recover solar energy from the top and / or side of the coke oven gas holder to generate electricity, thereby obtaining the power supply.

4. The method as described in claim 1, characterized in that, The method further includes: when there is a need for equipment maintenance, controlling the power generation equipment to shut down, and using the isolation device set between the hydrogen recovery equipment and the coke oven gas holder to isolate the hydrogen supply for equipment maintenance.

5. A hydrogen replenishment system for coke oven gas holders, characterized in that, The system includes: Coke oven gas holder; Control equipment; The power generation equipment is installed on the exterior of the coke oven gas holder and is controlled by the control equipment. It is used to recover the green energy on the exterior of the coke oven gas holder to generate electricity when the coke oven gas holder has a hydrogen replenishment requirement, so as to obtain the power supply. An electrolysis water device for producing hydrogen gas under the action of the power supply; The hydrogen recovery equipment is directly connected to the coke oven gas holder via a pipeline, and is used to directly transport the hydrogen produced by the water electrolysis equipment to the coke oven gas holder so as to directly mix it with the coke oven gas in the coke oven gas holder.

6. The system as described in claim 5, characterized in that, The power generation equipment includes: A wind power generation device is installed on the top surface of the coke oven gas holder to recover wind energy from the top surface of the coke oven gas holder for power generation, thereby obtaining the power supply.

7. The system as described in claim 6, characterized in that, The wind power generation equipment is installed on the frame on the top surface of the coke oven gas holder.

8. The system as described in claim 5 or 6, characterized in that, The power generation equipment also includes: A solar power generation device is installed on the top and / or side of the coke oven gas holder to recover solar energy from the top and / or side of the coke oven gas holder to generate electricity and obtain the power supply.

9. The system as described in claim 8, characterized in that, Solar power generation equipment is installed on the top and / or side frame of the coke oven gas holder.

10. The system as described in claim 5, characterized in that, The system also includes: An isolation device, installed in the pipeline between the hydrogen recovery equipment and the coke oven gas holder, is controlled by the control equipment and is used to perform hydrogen supply isolation when there is a need for equipment maintenance and the power generation equipment is shut down, so as to carry out equipment maintenance.

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