Wind-solar hydrogen production system

Abstract

The utility model relates to a wind-light hydrogen production system which comprises a photovoltaic power generation module, a wind power generation module, a water electrolysis hydrogen production module and a low-pressure hydrogen storage module, the water electrolysis hydrogen production module is connected with the low-pressure hydrogen storage module through a pipeline, and a forward water seal and a reverse water seal are arranged on the pipeline. The wind and light hydrogen production system can stabilize the pressure (3-20kPa) of the hydrogen outlet of the wind and light hydrogen production electrolytic cell, so that stable hydrogen consumption is continuously provided for a downstream hydrogen using module. The stable pressure of the low-pressure hydrogen storage module enables the pressure of the hydrogen side outlet of the hydrogen production electrolytic cell not to fluctuate along with the fluctuation of the wind-solar power generation power load through positive and negative water sealing, and then the hydrogen-oxygen pressure difference of the electrolytic cell is kept stable. According to the utility model, the low-pressure hydrogen storage module with the corresponding volume is arranged according to the 24-hour accumulated hydrogen production of the electrolytic bath and the stable hydrogen demand amount per hour of a downstream customer, so that the 24-hour stable hydrogen consumption can be provided for downstream hydrogen use.

Description

Technical Field

[0001] The utility model belongs to the technical field of green energy, and specifically relates to a wind-solar hydrogen production system, in particular to a stable wind-solar hydrogen production system. Background Art

[0002] With the continuous development of wind and photovoltaic power generation technologies, the proportion of renewable energy in my country's power generation is increasing, and so is the amount of renewable energy generated. Hydrogen, as a carrier of clean energy, is a crucial component in achieving "carbon peak and carbon neutrality" and a key link in the energy transition. According to my country's hydrogen energy planning and market demand, hydrogen demand is expected to experience explosive growth in the future. Currently, the main source of hydrogen is fossil fuel production, which emits large amounts of greenhouse gases during the production process, hindering the achievement of my country's "carbon peak and carbon neutrality" goals. Hydrogen production through water electrolysis can produce high-purity hydrogen with near-zero carbon emissions, contributing to the achievement of the "dual carbon" goals. Water electrolysis is the main method for producing green hydrogen and is powered by the main power grid. However, electricity costs lead to high production costs, making it less costly than fossil fuel-based hydrogen. Therefore, to reduce the cost of water electrolysis and promote the uptake of new energy, combining renewable energy with water electrolysis technology to achieve the conversion of electricity into hydrogen will promote the development of my country's hydrogen energy industry.

[0003] However, wind power output is subject to significant fluctuations due to the influence of natural wind conditions. This volatility manifests itself primarily in two ways: a large diurnal variability, meaning that wind power output fluctuates significantly within a single day; and a large seasonal variability, meaning that wind power output varies significantly between seasons. This volatility contributes to the strong seasonality and intermittency of wind power generation. Similarly, the output of photovoltaic power generation systems is directly affected by natural conditions, particularly variations in solar irradiance. When solar irradiance intensity fluctuates rapidly, the output of photovoltaic power generation systems fluctuates rapidly over a wide range. This volatility also contributes to the randomness and intermittency of photovoltaic power generation systems. Due to the uncertainty of natural conditions, the output of both wind and photovoltaic power generation systems is subject to uncertainty and volatility. This volatility not only affects the stability of the power generation system but also impacts downstream hydrogen consumption systems. Specifically, during hydrogen production from wind and solar power generation, this volatility can cause fluctuations in the hydrogen-oxygen pressure in the hydrogen electrolyzer, which in turn reduces the electrolyzer's lifespan and increases safety risks. At the same time, this volatility will also reduce the quality and purity of hydrogen, resulting in the inability to provide a stable amount of hydrogen to downstream users. Utility Model Content

[0004] In order to improve the above technical problems, the present invention provides a wind-solar hydrogen production system, which includes: a photovoltaic power generation module, a wind power generation module, a water electrolysis hydrogen production module and a low-pressure hydrogen storage module, wherein the water electrolysis hydrogen production module and the low-pressure hydrogen storage module are connected by a pipeline, and a positive water seal and a reverse water seal are provided on the pipeline.

[0005] According to the implementation scheme of the present utility model, in the wind-solar hydrogen production system, the photovoltaic power generation module and the wind power generation module are arranged in parallel and connected in series with the water electrolysis hydrogen production module, thereby providing energy for the water electrolysis hydrogen production module.

[0006] According to the implementation scheme of the present utility model, the water electrolysis hydrogen production module is connected to the positive water seal and the reverse water seal through pipelines respectively.

[0007] According to the implementation scheme of the present utility model, the positive water seal and the reverse water seal can be positive water seal and reverse water seal devices known in the art.

[0008] According to an exemplary embodiment of the present invention, the positive water seal has a first air inlet at its top left end, and a first air outlet at its top right end; the reverse water seal has a second air outlet at its top left end, and a second air inlet at its top right end; the first air inlet of the positive water seal is connected to the second air outlet of the reverse water seal, and the first air outlet of the positive water seal is connected to the second air inlet of the reverse water seal. This achieves intrinsic safety by combining the three functions of backflow prevention, pressure stabilization, and fire prevention.

[0009] According to the implementation scheme of the present utility model, the positive water seal is further provided with a first water replenishment port, a first liquid level display and control port and a first drain port.

[0010] According to an embodiment of the present invention, a first viewing mirror (for example, the first viewing mirror is circular) is further provided on the positive water seal for observation.

[0011] According to the implementation scheme of the present utility model, the reverse water seal is further provided with a second water replenishment port, a second liquid level display, a second control port and a drain port.

[0012] According to an embodiment of the present invention, a second viewing mirror (for example, the second viewing mirror is circular) is further provided on the reverse water seal for observation.

[0013] According to the implementation scheme of the present utility model, the wind-solar hydrogen production system also includes a DCS (Distributed Control System) control system.

[0014] According to the implementation scheme of the present utility model, the low-pressure hydrogen storage module is connected to the positive water seal and the reverse water seal through pipelines respectively.

[0015] According to an embodiment of the present invention, the wind-solar hydrogen production system further includes a hydrogen compression module, which is connected to the water electrolysis hydrogen production module, the positive water seal, and the reverse water seal via pipelines. For example, the hydrogen compression module is a water ring hydrogen compressor.

[0016] According to the embodiment of the present utility model, the wind-solar hydrogen production system further includes a downstream hydrogen-using module located downstream of the hydrogen compression module, and the downstream hydrogen-using module is connected to the hydrogen compression module through a pipeline.

[0017] According to the embodiment of the present utility model, the wind-solar hydrogen production system further includes an oxygen collection module, which is connected to the anode electrode of the water electrolysis hydrogen production module.

[0018] According to the embodiment of the present invention, the wind-solar hydrogen production system may further include an electric energy storage module, which is arranged between the photovoltaic power generation module, the wind power generation module and the water electrolysis hydrogen production module, or arranged within the water electrolysis hydrogen production module, so that the electric energy generated by the photovoltaic power generation module and the wind power generation module is stored in the electric energy storage module, so that the electric energy storage module supplies power to the water electrolysis hydrogen production module. As an example, when the wind-solar hydrogen production system includes an electric energy storage module, the photovoltaic power generation module and the wind power generation module are connected in parallel with the electric energy storage module so that the electric energy is stored in the electric energy storage module, and the electric energy storage module provides energy for the water electrolysis hydrogen production module.

[0019] According to an embodiment of the present invention, the electrical energy storage module is selected from one or more of a gravity energy storage module, a chemical energy storage module and a battery energy storage module.

[0020] According to the embodiment of the present utility model, the hydrogen outlet of the water electrolysis hydrogen production module is provided with a pressure regulating module, such as a pressure regulating valve.

[0021] According to the embodiment of the present utility model, the water electrolysis hydrogen production module can be an electrolyzer for water electrolysis hydrogen production known in the art.

[0022] According to an exemplary embodiment of the present utility model, a cathode electrode is provided at the top left end of the electrolysis water hydrogen production module, and the cathode electrode is connected to the positive water seal and the reverse water seal through a pipeline; an anode electrode is provided at the top right end of the electrolysis water hydrogen production module, and the anode electrode is connected to the oxygen collection module through a pipeline.

[0023] According to the embodiment of the present utility model, the low-pressure hydrogen storage module is a hydrogen gas tank, for example, a wet single-section vertical lift gas tank.

[0024] According to an exemplary embodiment of the present invention, the low-pressure hydrogen storage module includes a water storage unit and a sealing unit disposed above the water storage unit. Preferably, the water storage unit is, for example, a water tank; and the sealing unit can be selected from a cover, such as a bell jar.

[0025] In one embodiment of the present invention, the water storage unit and the enclosed unit are connected by a guide rail. Preferably, the guide rail is a vertical lift guide rail, so that the liquid level of the low-pressure hydrogen storage module rises and falls with pressure changes, thereby achieving the purpose of pressure stabilization.

[0026] In one embodiment of the present invention, a third air inlet is provided on the water storage unit, and the first air outlet of the positive water seal and the second air inlet of the reverse water seal are respectively connected to the third air inlet through pipelines.

[0027] In one embodiment of the present invention, a counterweight is provided on the top of the enclosed unit to adjust the pressure in the water storage unit.

[0028] In one embodiment of the present invention, the low-pressure hydrogen storage module is further provided with a liquid level monitoring unit. For example, the liquid level monitoring unit is a liquid level gauge. The liquid level gauge is used to monitor the liquid level in the low-pressure hydrogen storage module in real time and transmit the information to the control system.

[0029] In one embodiment of the present invention, the water storage unit is provided with a third water replenishment port, a steam inlet, a circulating water inlet, a steam condensate outlet, a drain port, a replacement drain port and a condensate drain port to achieve hydrogen storage.

[0030] In one embodiment of the present invention, a replacement port and a venting port are provided on the closed unit to achieve the purpose of system replacement and safe operation of starting and stopping.

[0031] According to the implementation scheme of the present utility model, the wind-solar hydrogen production system includes a photovoltaic power generation module and a wind power generation module arranged in parallel, an electrical energy storage module, a water electrolysis hydrogen production module, a positive water seal and a reverse water seal, a low-pressure hydrogen storage module, a hydrogen compression module and a downstream hydrogen use module, wherein the water electrolysis hydrogen production module, the hydrogen compression module and the low-pressure hydrogen storage module are respectively connected to the positive water seal and the reverse water seal through pipelines.

[0032] According to the embodiment of the present utility model, the hydrogen storage capacity V of the low-pressure hydrogen storage module is 储 It complies with the following formula (1):

[0033] V 储 =V h ×24 (1)

[0034] Among them, V h The hourly hydrogen consumption of the downstream hydrogen module.

[0035] According to the embodiment of the present utility model, the hydrogen production capacity V of the water splitting hydrogen production module is 产 It complies with the following formula (2):

[0036] V 产 =V 储 / T (2)

[0037] Wherein, T is the cumulative full-load operation time of the water decomposition hydrogen production module.

[0038] According to the embodiment of the present utility model, the hydrogen outlet pressure of the water electrolysis hydrogen production module is 3-20 kPa.

[0039] According to the embodiment of the present utility model, the hydrogen outlet pressure of the low-pressure hydrogen storage module is 2-15 kPa.

[0040] According to an embodiment of the present utility model, preferably, the design pressure value of the low-pressure hydrogen storage module is determined according to the design parameters of the hydrogen compressor inlet.

[0041] The present invention also provides a method for producing hydrogen from wind and solar power, comprising producing hydrogen using the aforementioned wind and solar power generation system. Preferably, the electricity generated by the photovoltaic power generation module and the wind power generation module serves as the energy source for the water electrolysis hydrogen production module, which produces hydrogen and oxygen. The hydrogen produced by the water electrolysis hydrogen production module is then transferred through a positive water seal to a low-pressure hydrogen storage module for storage.

[0042] According to the embodiment of the present utility model, the method for producing hydrogen from wind and solar power comprises the following steps:

[0043] S1. The electricity generated by the photovoltaic power generation module and the wind power generation module supplies power to the water electrolysis hydrogen production module. The water electrolysis hydrogen production module electrolyzes water to produce hydrogen and oxygen. The prepared hydrogen is stored in the low-pressure hydrogen storage module after passing through a positive water seal, and / or is compressed by a hydrogen compression module (such as a water ring hydrogen compressor) for use by the downstream hydrogen use module;

[0044] S2. When the power generation of the photovoltaic power generation module and the wind power generation module is greater than the power consumption of the water electrolysis hydrogen production module, the energy storage module works to store the excess power generation;

[0045] S3. When the hydrogen storage in the low-pressure hydrogen storage module exceeds the preset maximum value, the hydrogen is fed back to the water electrolysis hydrogen production module, which stops working or reduces the power. The excess power generation is stored in the electric energy storage module.

[0046] S4. When the power generation of the photovoltaic power generation module and the wind power generation module is less than the power consumption of the water electrolysis hydrogen production module, the hydrogen stored in the low-pressure hydrogen storage module is consumed first (the hydrogen stored in the low-pressure hydrogen storage module is compressed by the hydrogen compression module after passing through the reverse water seal and then supplied to the downstream hydrogen module for use, and at the same time flows back to the water electrolysis hydrogen production module to stabilize the hydrogen outlet pressure of the water electrolysis hydrogen production module); when the hydrogen stored in the low-pressure hydrogen storage module is less than the preset minimum value, the electric energy storage module is turned on to supply power to the water electrolysis hydrogen production module.

[0047] According to the embodiment of the present utility model, in step S1, the hydrogen outlet pressure of the water electrolysis hydrogen production module is 3-20 kPa.

[0048] According to the embodiment of the present invention, in step S1, the temperature in the water electrolysis hydrogen production module is controlled at 80-90°C.

[0049] Beneficial effects:

[0050] (1) The wind-solar hydrogen production system of the present invention can stabilize the hydrogen outlet pressure (3-20kPa) of the electrolyzer of the wind-solar hydrogen production module, thereby continuously providing a stable amount of hydrogen for the downstream hydrogen-using module. Among them, the stable low-pressure hydrogen storage module pressure is achieved through the "positive and reverse water seals" (i.e. positive water seals and reverse water seals) so that the pressure at the hydrogen-side outlet of the hydrogen-producing electrolyzer does not fluctuate widely with the fluctuation of the wind-solar power generation load, thereby maintaining the hydrogen-oxygen pressure difference of the electrolyzer stable. The present invention sets a low-pressure hydrogen storage module of corresponding volume according to the cumulative hydrogen production of the electrolyzer in 24 hours and the stable hydrogen demand of downstream customers per hour, which can provide a stable amount of hydrogen for downstream users in 24 hours. At the same time, the utility model sets a "reverse" water seal to prevent the hydrogen stored in the low-pressure hydrogen storage module from flowing back to the water electrolysis hydrogen production module and the hydrogen pipeline connected thereto, so that the hydrogen pressure in the low-pressure hydrogen storage module is always maintained at a constant pressure operation, so that the inlet pressure of the hydrogen compression module connected thereto is constant, thereby promoting the stable operation of the compressor of the hydrogen compression module to extend its service life.

[0051] (2) The synergistic effect of the forward and reverse water seals and the low-pressure hydrogen storage module in the wind-solar hydrogen production system of the present invention has the following advantages compared with high-pressure hydrogen storage equipment such as high-pressure spherical tanks:

[0052] 1. The low-pressure hydrogen storage module has a constant and low pressure, which reduces the risk of hydrogen leakage and increases safety.

[0053] 2. The low-pressure hydrogen storage module serves as the outlet pressure of the hydrogen pressure regulating valve of the water electrolysis hydrogen production system, reducing the difficulty of adjusting the hydrogen side pressure regulating valve of the water electrolysis hydrogen production module caused by fluctuations in the wind power generation module and the photovoltaic power generation module, thereby reducing the hydrogen pressure fluctuation of the water electrolysis hydrogen production module and thus reducing the fluctuation of hydrogen quality.

[0054] 3. The hydrogen pressure of the hydrogen storage module will not change with the changes in the hydrogen production volume of the hydrogen production module and the downstream hydrogen consumption, but can always maintain a constant hydrogen pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 This is a schematic diagram of a wind-solar hydrogen production system of the utility model;

[0056] Figure 2 This is a schematic diagram of the structure of the positive water seal and reverse water seal of the utility model;

[0057] Figure 3 This is a schematic structural diagram of the low-pressure hydrogen storage module of the utility model;

[0058] The reference numerals have the following meanings:

[0059] 1-1: Wind power generation module; 1-2: Photovoltaic power generation module; 2: Water electrolysis hydrogen production module; 3-1: Positive water seal; 311: First air inlet; 312: First air outlet; 313: First water supply port; 314: First liquid level display and control port; 315: First drain port; 316: First sight glass; 3-2: Reverse water seal; 321: Second air inlet; 322: Second air outlet; 323: Second water supply port; 324: Second liquid level display and control port; 325: Second drain outlet; 326: Second sight glass; 4: Low-pressure hydrogen storage module; 41: Water storage unit; 411: Third water replenishment port; 412: Steam inlet; 413: Circulating water inlet; 414: Steam condensate outlet; 415: Drain port; 416: Third air inlet; 417: Displacement drain port; 418: Condensate drain port; 42: Enclosed unit; 421: Displacement port; 422: Vent port; 5: Hydrogen compression module; 6: Downstream hydrogen module; 7: Oxygen collection module. DETAILED DESCRIPTION

[0060] The following will further describe the technical solutions of the present invention in conjunction with specific embodiments. It should be understood that the following embodiments are merely illustrative and explain the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are included within the scope of protection intended by the present invention.

[0061] Unless otherwise specified, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods.

[0062] Example 1: Wind-solar hydrogen production system

[0063] Reference Figure 1This embodiment provides a wind-solar hydrogen production system, which includes a photovoltaic power generation module 1-1 and a wind power generation module 1-2 arranged in parallel, an electric energy storage module, a water electrolysis hydrogen production module 2, a positive water seal 3-1 and a reverse water seal 3-2, a low-pressure hydrogen storage module 4, a hydrogen compression module 5 and a downstream hydrogen use module 6, wherein the water electrolysis hydrogen production module 2, the hydrogen compression module 5 and the low-pressure hydrogen storage module 4 are respectively connected to the positive water seal 3-1 and the reverse water seal 3-2 through pipelines, and the downstream hydrogen use module 6 is connected to the hydrogen compression module 5 through a pipeline.

[0064] Preferably, the wind-solar hydrogen production system further includes an electric energy storage module ( Figure 1 (not shown), the electric energy generated by the photovoltaic power generation module 1-2 and the wind power generation module 1-1 is stored in the electric energy storage module, so that the electric energy storage module supplies power to the water electrolysis hydrogen production module 2; wherein, the electric energy storage module is selected from one or more of a gravity energy storage module, a chemical energy storage module and a battery energy storage module.

[0065]

Water electrolysis hydrogen production module

[0066] A cathode electrode is provided at the top left end of the electrolytic water hydrogen production module 2, and a hydrogen tube is sleeved on the top of the cathode electrode. The outside of the hydrogen tube is connected to the positive water seal 3-1 and the reverse water seal 3-2; an anode electrode is provided at the top right end of the electrolytic water hydrogen production module 2, and an oxygen tube is sleeved on the top of the anode electrode. The outside of the oxygen tube is connected to the oxygen collection module 7.

[0067]

Positive water seal, reverse water seal

[0068] The positive water seal has a first air inlet 311 at its top left end, and a first air outlet 312 at its top right end. The reverse water seal has a second air outlet 322 at its top left end, and a second air inlet 321 at its top right end. The positive water seal's first air inlet 311 is connected to the reverse water seal's second air outlet 322, and the positive water seal's first air outlet 312 is connected to the reverse water seal's second air inlet 321. This achieves intrinsic safety by combining the three functions of backflow prevention, pressure stabilization, and fire prevention.

[0069] The positive water seal 3 - 1 is further provided with a first water replenishment port 313 , a first liquid level display and control port 314 , a first drain port 315 and a circular first sight glass 316 for observation.

[0070] The reverse water seal is also provided with a second water replenishment port 323, a second liquid level display and control port 324, a second drain port 325 and a circular second sight glass 326 for observation.

[0071] The wind-solar hydrogen production system also includes a DCS (Distributed Control System) control system.

[0072]

Low-pressure hydrogen storage module

[0073] The low-pressure hydrogen storage module 4 is a wet single-section vertical lift gas holder, comprising a water storage unit 41 and a sealing unit 42 arranged on the upper part of the water storage unit; the water storage unit 41 is a water tank; the sealing unit 42 is a bell jar.

[0074] The water storage unit 41 and the sealing unit 42 are connected by a vertical lifting rail, so that the liquid level of the low-pressure hydrogen storage module can rise and fall with the pressure change, thereby achieving the purpose of pressure stabilization.

[0075] The water storage unit 41 is provided with a third air inlet 416 , and the first air outlet 312 of the positive water seal 3 - 1 and the second air outlet 321 of the reverse water seal 3 - 2 are connected to the third air inlet 416 through pipelines.

[0076] A counterweight is provided on the top of the closed unit 42, and the pressure in the water storage unit is adjusted by the counterweight.

[0077] The low-pressure hydrogen storage module 4 is further provided with a liquid level monitoring unit, which is a liquid level gauge. The liquid level in the low-pressure hydrogen storage module is monitored in real time by the liquid level gauge and transmitted to the control system.

[0078] The water storage unit 41 is provided with a third water replenishment port 411 , a steam inlet 412 , a circulating water inlet 413 , a steam condensate outlet 414 , a drain port 415 , a replacement drain port 417 and a condensate drain port 418 to achieve hydrogen storage.

[0079] The closed unit 42 is provided with a replacement port 421 and a venting port 422 to achieve the purpose of system replacement and safe operation of starting and stopping.

[0080] Example 2

[0081] The method for producing hydrogen from wind and solar power includes the following steps:

[0082] S1. In the wind-solar hydrogen production system of Example 1, the electric energy generated by the photovoltaic power generation module 1-2 and the wind power generation module 1-1 is used to power the water electrolysis hydrogen production module 2, and the water electrolysis hydrogen production module 2 (the temperature in the water electrolysis hydrogen production module is controlled at 80-90°C) electrolyzes water to produce hydrogen and oxygen. The prepared hydrogen passes through the positive water seal 3-1 and is stored in the hydrogen gas cabinet through the third air inlet 416 of the low-pressure hydrogen storage module 4 through the pipeline, and is compressed by the water ring hydrogen compressor (the compressor performance parameter is an inlet pressure of 5kPa) for use by the downstream hydrogen module 6; wherein, the oxygen outlet pressure of the water electrolysis hydrogen production module 2 is 12kPa, and the hydrogen outlet is set to 15kPa through the pressure regulating valve, and the pressure delivered to the hydrogen gas cabinet through the pipeline through the positive water seal 3-1 and the reverse water seal 3-2 is always a stable 5kPa;

[0083] S2. When the power generation of the photovoltaic power generation module 1-2 and the wind power generation module 1-1 is greater than the power consumption of the water electrolysis hydrogen production module 2, the electric energy storage module works to store the excess power generation;

[0084] S3: When the hydrogen storage in the low-pressure hydrogen storage module 4 is greater than the preset maximum value, it is fed back to the water electrolysis hydrogen production module 2, which stops working or reduces the power, and the excess power generation is stored in the electric energy storage module;

[0085] S4. When the power generation of the photovoltaic power generation module 1-2 and the wind power generation module 1-1 is less than the power consumption of the water electrolysis hydrogen production module 2, the hydrogen stored in the low-pressure hydrogen storage module 4 passes through the reverse water seal 3-2 and is compressed by the water ring hydrogen compressor and then supplied to the downstream hydrogen module 6 for use. At the same time, it flows back to the water electrolysis hydrogen production module 2 to stabilize the hydrogen outlet pressure of the water electrolysis hydrogen production module 2; when the hydrogen stored in the low-pressure hydrogen storage module 4 is less than the preset minimum value, the electric energy storage module is turned on to supply power to the water electrolysis hydrogen production module 2.

[0086] When the hydrogen consumption of the downstream hydrogen module 6 is 500Nm 3 / h, and when hydrogen is used continuously for 24 hours, the hydrogen storage capacity of the low-pressure hydrogen storage module 4 is designed to meet the 24-hour hydrogen use of the downstream. The designed hydrogen storage capacity of the low-pressure hydrogen storage module 4 is 500*24=12000Nm 3 The wind-solar hydrogen production system of this embodiment is used to produce hydrogen by wind-solar power generation. If the electrolysis water hydrogen production module 2 operates at full load for 6 hours a day (within 24 hours), then a 12000Nm 3 / 6h=2000Nm 3 / h water electrolysis hydrogen production module 2, can be a 2000Nm 3 / h or 2 units of 1000Nm 3 / h atmospheric pressure square electrolyzer for hydrogen production.

[0087] The above descriptions of the embodiments of the present invention are illustrative. However, the scope of protection of the present invention is not limited to the above-described embodiments. Any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A wind-solar hydrogen production system, characterized in that: The wind-solar hydrogen production system includes: a photovoltaic power generation module, a wind power generation module, a water electrolysis hydrogen production module and a low-pressure hydrogen storage module, wherein the water electrolysis hydrogen production module and the low-pressure hydrogen storage module are connected by a pipeline, and a positive water seal and a reverse water seal are provided on the pipeline.

2. The wind-solar hydrogen production system according to claim 1, characterized in that: The wind-solar hydrogen production system further includes an electric energy storage module, which is arranged between the photovoltaic power generation module, the wind power generation module and the water electrolysis hydrogen production module, or arranged within the water electrolysis hydrogen production module; The electrical energy storage module is selected from one or more of a gravity energy storage module, a chemical energy storage module and a battery energy storage module.

3. The wind-solar hydrogen production system according to claim 2, characterized in that: A first air inlet is provided at the left end of the top of the positive water seal, and a first air outlet is provided at the right end of the top of the positive water seal; a second air outlet is provided at the left end of the top of the reverse water seal, and a second air inlet is provided at the right end of the top of the reverse water seal; the first air inlet of the positive water seal is connected to the second air outlet of the reverse water seal, and the first air outlet of the positive water seal is connected to the second air inlet of the reverse water seal.

4. The wind-solar hydrogen production system according to any one of claims 1 to 3, characterized in that: A cathode electrode is provided at the top left end of the electrolytic water hydrogen production module, and the cathode electrode is connected to the positive and reverse water seals through pipelines; an anode electrode is provided at the top right end of the electrolytic water hydrogen production module, and the anode electrode is connected to the oxygen collection module through pipelines.

5. The wind-solar hydrogen production system according to any one of claims 1 to 3, characterized in that: In the wind-solar hydrogen production system, the photovoltaic power generation module and the wind power generation module are arranged in parallel and connected in series with the water electrolysis hydrogen production module.

6. The wind-solar hydrogen production system according to any one of claims 1 to 3, characterized in that: The low-pressure hydrogen storage module includes a water storage unit and a sealing unit arranged on the upper part of the water storage unit, and the water storage unit and the sealing unit are connected by a guide rail; The water storage unit is provided with a third air inlet, and the first air outlet of the positive water seal and the second air inlet of the reverse water seal are respectively connected to the third air inlet through pipelines; A counterweight is provided on the top of the closed unit; The water storage unit is provided with a third water replenishment port, a steam inlet, a circulating water inlet, a steam condensate outlet, a drain port, a replacement drain port and a condensate drain port; The closed unit is provided with a replacement port and a venting port.

7. The wind-solar hydrogen production system according to claim 6, characterized in that: The hydrogen storage capacity V of the low-pressure hydrogen storage module is 储 It complies with the following formula (1): V 储 =V h ×24 (1) Among them, V h The hourly hydrogen consumption of the downstream hydrogen module.

8. The wind-solar hydrogen production system according to claim 7, characterized in that: The hydrogen production capacity of the water splitting hydrogen production module is V 产 It complies with the following formula (2): V 产 =V 储 / T (2) Wherein, T is the cumulative full-load operation time of the water decomposition hydrogen production module.

9. The wind-solar hydrogen production system according to claim 7 or 8, characterized in that: The hydrogen outlet pressure of the water electrolysis hydrogen production module is 3-20 kPa; the hydrogen outlet pressure of the low-pressure hydrogen storage module is 2-15 kPa.

10. The wind-solar hydrogen production system according to any one of claims 1 to 3, characterized in that: The wind-solar hydrogen production system also includes a hydrogen compression module, which is connected to the water electrolysis hydrogen production module, the positive water seal and the reverse water seal through pipelines.

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