Water electrolysis hydrogen production system and method based on hydroelectric generation

Abstract

The invention discloses a water electrolysis hydrogen production system and method based on hydroelectric generation, and relates to the technical field of water electrolysis hydrogen production, the water electrolysis hydrogen production system comprises a system main body, a power supply unit, a hydrogen production unit, a heat collection unit, a gas transmission unit and a water supplementing unit are arranged in the system main body, and a hydroelectric generation module and a power transmission and transformation module are arranged in the power supply unit; a water electrolysis module is arranged in the hydrogen production unit, a waste heat recovery module and a heat supply module are arranged in the heat collection unit, a hydrogen purification module and an outward conveying module are arranged in the gas conveying unit, and a purified water preparation module and a water conveying pipeline module are arranged in the water supplementing unit. According to the water electrolysis hydrogen production system, the functions of waste heat recovery and circulating water replenishing are added in the hydrogen production process, so that the water electrolysis hydrogen production system can effectively reduce energy consumption, and meanwhile water resources are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of water electrolysis hydrogen production, and in particular to a water electrolysis hydrogen production system and method based on hydropower generation. Background Art

[0002] Under the global trend of carbon emission reduction, the country is encouraging the use of various renewable resources or green energy converted from renewable resources to replace the original fossil energy. Green hydrogen is a kind of green energy converted from renewable resources.

[0003] At present, the production of green hydrogen is mainly carried out through water electrolysis. However, due to the lack of energy recovery facilities, the hydrogen production process requires a large amount of energy consumption, and the consumption of water resources is also relatively serious. Summary of the invention

[0004] The object of the present invention is to provide a system and method for producing hydrogen by electrolyzing water based on hydropower generation, so as to solve the problems raised in the above-mentioned background technology.

[0005] By adopting the above technical solution, hydrogen production operations with lower power consumption can be achieved.

[0006] In view of the above problems, the technical solution proposed by the present invention is: A water electrolysis hydrogen production system based on hydropower generation comprises a system body, wherein a power supply unit, a hydrogen production unit, a heat receiving unit, a gas transmission unit and a water replenishment unit are arranged inside the system body, a hydropower generation module and a power transmission and transformation module are arranged inside the power supply unit, a water electrolysis module is arranged inside the hydrogen production unit, a waste heat recovery module and a heat supply module are arranged inside the heat receiving unit, a hydrogen purification module and an external transmission module are arranged inside the gas transmission unit, and a pure water preparation module and a water delivery pipeline module are arranged inside the water replenishment unit.

[0007] On the other hand, the present invention provides a method for producing hydrogen by electrolysis of water based on hydropower generation, comprising the following steps: S1. Power supply: The load of the power grid is adjusted through the hydropower generation module in the power supply unit, and the power transformer in the power transmission and transformation module is coordinated to provide power for the water electrolysis hydrogen production system; S2, electrolysis of water to produce hydrogen: after the power output of step S1, the electrolytic cell in the hydrogen production unit is connected to sufficient electric energy, and the water electrolysis module is operated to decompose water into hydrogen and oxygen, wherein the hydrogen is collected and purified, and the oxygen can be processed or discharged as needed; S3, waste heat recovery: by connecting a heat exchange cooling pipe outside the electrolytic cell to form a heat receiving unit, and recovering the waste heat of the cooling water through the waste heat recovery module in the heat receiving unit, so that the recovered heat is transported to the heat supply module, and the heat supply module is used to heat the electrolytic cell or supply equipment requiring heat energy; S4, hydrogen transportation: by connecting the gas transmission unit, the hydrogen generated in the electrolytic cell enters the hydrogen purification module, and by performing multi-stage filtration treatment on it, oxygen in the hydrogen is removed, and the purified hydrogen enters the external transmission module until it passes through the external transmission module and enters the hydrogen storage container; S5. Circulating water replenishment: By connecting the electrolytic cell to the water replenishment unit, the pure water preparation module inside it can continuously supply pure water to the electrolytic cell, and cooperate with the dredging and detection of the water supply pipeline module to monitor the water level inside the electrolytic cell in real time, so as to continuously replenish pure water to maintain the continuous operation of the system.

[0008] As a preferred technical solution of the present invention, in step S1, a transformer, a rectifier, a circuit protection switch and a three-phase cable are provided inside the power transmission and transformation module.

[0009] As a preferred technical solution of the present invention, in step S2, the device built into the water electrolysis module includes an alkaline aqueous solution electrolysis hydrogen production device, a solid polymer electrolysis hydrogen production device, and a high-temperature solid oxide electrolysis hydrogen production device.

[0010] As a preferred technical solution of the present invention, in step S3, the internal pipe material of the waste heat recovery module is metallic copper.

[0011] As a preferred technical solution of the present invention, in step S4, a deoxygenation device is provided inside the hydrogen purification module.

[0012] As a preferred technical solution of the present invention, in step S5, a liquid level sensor is provided inside the water delivery pipeline module.

[0013] Compared with the prior art, the present invention has the following beneficial effects: By adding the functions of waste heat recovery and circulating water replenishment during the hydrogen production process, the electrolytic water hydrogen production system can effectively reduce energy consumption and is also beneficial to saving water resources. Among them, by connecting a heat exchange cooling pipe outside the electrolytic cell, a heat receiving unit is formed, and the waste heat of the cooling water is recovered by the waste heat recovery module in the heat receiving unit, so that the recovered heat is transported to the heat supply module, and the heat supply module is used to heat the electrolytic cell or supply equipment requiring heat energy. By connecting the water replenishment unit to the electrolytic cell, the pure water preparation module inside it can continuously supply pure water to the electrolytic cell, and cooperate with the dredging and detection of the water supply pipeline module to monitor the water level inside the electrolytic cell in real time, and continuously replenish pure water to maintain the continuous operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A module block diagram of a water electrolysis hydrogen production system based on hydropower generation provided by the present invention; Figure 2 A flowchart of a method for producing hydrogen by electrolyzing water based on hydropower generation provided by the present invention.

[0015] In the figure: 100. System main body; 1001, power supply unit; 100101, hydropower generation module; 100102, power transmission and transformation module; 1002, hydrogen production unit; 100201, water electrolysis module; 1003, heat receiving unit; 100301, waste heat recovery module; 100302, heat supply module; 1004, gas transmission unit; 100401, hydrogen purification module; 100402, external transmission module; 1005. Water replenishment unit; 100501. Pure water preparation module; 100502. Water delivery pipeline module. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1The present invention provides a technical solution: a water electrolysis hydrogen production system based on hydropower generation, comprising a system body 100, wherein a power supply unit 1001, a hydrogen production unit 1002, a heat receiving unit 1003, a gas transmission unit 1004 and a water replenishment unit 1005 are arranged inside the system body 100, a hydropower generation module 100101 and a power transmission and transformation module 100102 are arranged inside the power supply unit 1001, a water electrolysis module 100201 is arranged inside the hydrogen production unit 1002, a waste heat recovery module 100301 and a heat supply module 100302 are arranged inside the heat receiving unit 1003, a hydrogen purification module 100401 and an external transmission module 100402 are arranged inside the gas transmission unit 1004, and a pure water preparation module 100501 and a water transmission pipeline module 100502 are arranged inside the water replenishment unit 1005.

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 2 The present invention provides a technical solution: a method for producing hydrogen by electrolysis of water based on hydropower generation, comprising the following steps: S1. Power supply: The load of the power grid is adjusted by the hydropower generation module 100101 in the power supply unit 1001, and the power transformer in the power transmission and transformation module 100102 is coordinated to provide power for the water electrolysis hydrogen production system; S2, electrolysis of water to produce hydrogen: After the power output of step S1, the electrolytic cell in the hydrogen production unit 1002 is connected to sufficient power, and through the operation of the water electrolysis module 100201, the water is decomposed into hydrogen and oxygen, wherein the hydrogen is collected and purified, and the oxygen can be processed or discharged as needed; S3, waste heat recovery: a heat exchange cooling pipe is connected to the outside of the electrolytic cell to form a heat receiving unit 1003, and the waste heat of the cooling water is recovered by the waste heat recovery module 100301 in the heat receiving unit 1003, so that the recovered heat is transported to the heat supply module 100302, and the heat supply module 100302 is used to heat the electrolytic cell or supply equipment requiring heat energy; S4, hydrogen transportation: by connecting the gas transmission unit 1004, the hydrogen generated in the electrolytic cell enters the hydrogen purification module 100401, and by performing multi-stage filtering treatment on it, oxygen in the hydrogen is removed, and the purified hydrogen enters the external transmission module 100402, until it passes through the external transmission module 100402 and enters the hydrogen storage container; S5. Circulating water replenishment: By connecting the electrolytic cell to the water replenishment unit 1005, the pure water preparation module 100501 inside it can continuously supply pure water to the electrolytic cell, and cooperate with the dredging and detection of the water supply pipeline module 100502 to monitor the water level inside the electrolytic cell in real time, so as to continuously replenish pure water to maintain the continuous operation of the system.

[0020] Among them, in step S1, the power transmission and transformation module 100102 is internally provided with a transformer, a rectifier, a circuit protection switch and a three-phase cable.

[0021] Among them, in step S2, the devices built into the water electrolysis module 100201 include an alkaline aqueous solution electrolysis hydrogen production device, a solid polymer electrolysis hydrogen production device, and a high-temperature solid oxide electrolysis hydrogen production device.

[0022] Among them, in step S3, the internal pipe material of the waste heat recovery module 100301 is metal copper.

[0023] Among them, in step S4, a deoxygenation device is provided inside the hydrogen purification module 100401.

[0024] In step S5, a liquid level sensor is provided inside the water supply pipeline module 100502.

Claims

1. A water electrolysis hydrogen production system based on hydropower generation, characterized in that: The invention comprises a system body (100), wherein a power supply unit (1001), a hydrogen production unit (1002), a heat receiving unit (1003), a gas transmission unit (1004) and a water replenishment unit (1005) are arranged inside the system body (1000); a hydropower generation module (100101) and a power transmission and transformation module (100102) are arranged inside the power supply unit (1001); a water electrolysis module (100201) is arranged inside the hydrogen production unit (1002); a waste heat recovery module (100301) and a heat supply module (100302) are arranged inside the heat receiving unit (1003); a hydrogen purification module (100401) and an external transmission module (100402) are arranged inside the gas transmission unit (1004); and a pure water preparation module (100501) and a water transmission pipeline module (100502) are arranged inside the water replenishment unit (1005).

2. A method for producing hydrogen by electrolysis of water based on hydropower generation as claimed in claim 1, characterized in that: The following steps are involved: S1. Power supply: The load of the power grid is adjusted by the hydropower generation module (100101) in the power supply unit (1001), and the power transformer in the power transmission and transformation module (100102) is coordinated to provide power for the water electrolysis hydrogen production system; S2, electrolysis of water to produce hydrogen: after the power output of step S1, the electrolytic cell in the hydrogen production unit (1002) is connected to a sufficient amount of electric energy, and through the operation of the water electrolysis module (100201), the water is decomposed into hydrogen and oxygen, wherein the hydrogen is collected and purified, and the oxygen can be processed or discharged as needed; S3, waste heat recovery: a heat exchange cooling pipe is connected to the outside of the electrolytic cell to form a heat receiving unit (1003), and the waste heat of the cooling water is recovered by the waste heat recovery module (100301) in the heat receiving unit (1003), so that the recovered heat is transported to the heat supply module (100302), and the heat supply module (100302) is used to heat the electrolytic cell or supply equipment requiring heat energy; S4, hydrogen transportation: by connecting the gas transmission unit (1004), the hydrogen generated in the electrolytic cell enters the hydrogen purification module (100401), and by performing multi-stage filtering on the hydrogen, oxygen in the hydrogen is removed, and the purified hydrogen enters the external transmission module (100402), until it passes through the external transmission module (100402) and enters the hydrogen storage container; S5. Circulating water replenishment: By connecting the electrolytic cell to the water replenishment unit (1005), the pure water preparation module (100501) inside the electrolytic cell can continuously supply pure water to the electrolytic cell, and cooperate with the dredging and detection of the water supply pipeline module (100502) to monitor the water level inside the electrolytic cell in real time, so as to continuously replenish pure water to maintain the continuous operation of the system.

3. A method for producing hydrogen by electrolysis of water based on hydropower generation according to claim 2, characterized in that: In step S1, the power transmission and transformation module (100102) is internally provided with a transformer, a rectifier, a circuit protection switch and a three-phase cable.

4. A method for producing hydrogen by electrolysis of water based on hydropower generation according to claim 2, characterized in that: In step S2, the devices built into the water electrolysis module (100201) include an alkaline aqueous solution electrolysis hydrogen production device, a solid polymer electrolysis hydrogen production device, and a high-temperature solid oxide electrolysis hydrogen production device.

5. A method for producing hydrogen by electrolysis of water based on hydropower generation according to claim 2, characterized in that: In step S3, the internal pipe material of the waste heat recovery module (100301) is metallic copper.

6. A method for producing hydrogen by electrolysis of water based on hydropower generation according to claim 2, characterized in that: In step S4, a deoxygenation device is provided inside the hydrogen purification module (100401).

7. A method for producing hydrogen by electrolysis of water based on hydropower generation according to claim 2, characterized in that: In step S5, a liquid level sensor is provided inside the water pipeline module (100502).

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