Hydrogen production system

Abstract

The invention provides a hydrogen production system which comprises at least one water electrolysis hydrogen production device used for electrolyzing water to produce hydrogen and oxygen, and each water electrolysis hydrogen production device comprises a hydrogen-alkali mixture outlet and an oxygen-alkali mixture outlet; a hydrogen-alkali mixture outlet or an oxygen-alkali mixture outlet of each water electrolysis hydrogen production device is independently provided with a gas analysis device and an alkali liquor supply adjusting device, and the gas analysis device is used for analyzing the hydrogen purity of the hydrogen-alkali mixture outlet or the oxygen purity of the oxygen-alkali mixture outlet of the water electrolysis hydrogen production device. The alkali liquor supply adjusting equipment is used for supplying and adjusting alkali liquor of the water electrolysis hydrogen production equipment, and the problems that gas produced by an existing electrolytic bath is separated and analyzed through the same separator, the electrolytic bath with poor gas product purity in a system cannot be diagnosed, and then the faulted electrolytic bath cannot be rapidly positioned and isolated, and the system is not easy to operate are solved. And the electrolytic bath alkali liquor cannot be independently supplied and adjusted, so that the hydrogen production efficiency of the electrolytic bath in the hydrogen production system is low.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production, and in particular to a hydrogen production system. Background Art

[0002] Hydrogen energy - chemical energy released by the chemical reaction of hydrogen and oxygen, is a secondary clean energy. Hydrogen energy is considered to be an ideal energy carrier because of its zero pollution, wide sources, and convenient conversion between hydrogen and electricity.

[0003] Hydrogen production mainly includes fossil fuel reforming, industrial byproduct hydrogen production and water electrolysis. Using renewable energy such as wind power and photovoltaics to produce green hydrogen through electrolysis is considered to be the main source of hydrogen in the future. This is also an effective way to reduce carbon emissions. Alkaline water electrolysis is currently the most mature and widely used hydrogen production technology.

[0004] The inventors have discovered that the gases produced by each electrolyzer in the existing hydrogen production system are separated and analyzed by the same separator, and it is impossible to diagnose the electrolyzer in the hydrogen production system whose gas product purity has deteriorated, and thus it is impossible to quickly locate and isolate the faulty electrolyzer, and it is also impossible to independently replenish and adjust the alkaline solution in the electrolyzer, resulting in low hydrogen production efficiency of the electrolyzer in the hydrogen production system. Summary of the invention

[0005] In this regard, the present application provides a hydrogen production system to solve the problem that the gases produced by each electrolyzer in the existing hydrogen production system are separated and analyzed by the same separator, and the electrolyzer with deteriorated gas product purity in the hydrogen production system cannot be diagnosed, and thus the faulty electrolyzer cannot be quickly located and isolated, and the alkaline solution in the electrolyzer cannot be independently replenished and adjusted, resulting in low hydrogen production efficiency of the electrolyzer in the hydrogen production system.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0007] The present application discloses a hydrogen production system, comprising: at least one water electrolysis hydrogen production device, used for electrolyzing water to produce hydrogen and oxygen, each of the water electrolysis hydrogen production devices comprising a hydrogen-alkali mixture outlet and an oxygen-alkali mixture outlet;

[0008] A gas analysis device and an alkali solution supply and regulation device are independently provided at the hydrogen-alkali mixture outlet or the oxygen-alkali mixture outlet of each of the water electrolysis hydrogen production equipment. The gas analysis device is used to analyze the hydrogen purity at the hydrogen-alkali mixture outlet or the oxygen purity at the oxygen-alkali mixture outlet of the water electrolysis hydrogen production equipment, and the alkali solution supply and regulation device is used to supply and regulate the alkali solution of the water electrolysis hydrogen production equipment.

[0009] Optionally, in the above hydrogen production system, the gas analysis equipment includes: a solenoid valve, a separator, a liquid collector and a gas analyzer;

[0010] The hydrogen-alkali mixture outlet or the oxygen-alkali mixture outlet of the water electrolysis hydrogen production equipment is connected to the inlet of the separator through the solenoid valve;

[0011] The gas outlet of the separator is connected to the gas analyzer, and the liquid outlet of the separator is connected to the liquid collector;

[0012] The gas analyzer is used to analyze the hydrogen purity at the outlet of the hydrogen-base mixture of the water electrolysis hydrogen production equipment, or the oxygen purity at the outlet of the oxygen-base mixture of the water electrolysis hydrogen production equipment;

[0013] The liquid collector is used to store the liquid separated by the separator.

[0014] Optionally, in the above hydrogen production system, the gas analysis device further comprises: a stop valve and / or a pressure reducing valve;

[0015] The gas outlet of the separator is connected to the gas analyzer through the stop valve and the pressure reducing valve;

[0016] The stop valve is used to control the gas outlet of the separator;

[0017] The pressure reducing valve is used to control the gas pressure of the gas analyzer.

[0018] Optionally, in the above-mentioned hydrogen production system, the gas analysis equipment further comprises: a magnetic flap level gauge, and the magnetic flap level gauge is used to measure the medium level in the separator.

[0019] Optionally, in the above-mentioned hydrogen production system, the alkali solution supply and regulation equipment includes: an alkali tank, an alkali supply pump and a ball valve;

[0020] The liquid collector in the gas analysis device is connected to the liquid outlet of the hydrogen separator or the liquid outlet of the oxygen separator of the water electrolysis hydrogen production device through the alkali tank, the alkali replenishment pump and the ball valve in sequence;

[0021] The alkali tank is at least used to store the alkali solution in the liquid collector;

[0022] The alkali replenishing pump is used to replenish the alkali solution of the water electrolysis hydrogen production equipment;

[0023] The ball valve is used to adjust the flow rate of the supplied alkali solution.

[0024] Optionally, in the above-mentioned hydrogen production system, the water electrolysis hydrogen production equipment includes: an electrolyzer, an oxygen separator, a hydrogen separator, an alkali liquid circulation pump and an alkali liquid cooler;

[0025] The hydrogen-alkali mixture outlet of the electrolyzer is connected to the inlet pipeline of the hydrogen separator; the oxygen-alkali mixture outlet of the electrolyzer is connected to the inlet pipeline of the oxygen separator;

[0026] The inlet of the alkali liquid circulation pump is connected to the liquid outlet of the hydrogen separator and the liquid outlet pipeline of the oxygen separator respectively, the outlet of the alkali liquid circulation pump is connected to the inlet pipeline of the alkali liquid cooler, and the outlet of the alkali liquid cooler is connected to the alkali liquid inlet pipeline of the electrolyzer.

[0027] Optionally, in the above-mentioned hydrogen production system, the water electrolysis hydrogen production equipment further includes: an alkali liquid flow meter, and the alkali liquid flow meter is arranged in the pipeline between the alkali liquid circulation pump and the alkali liquid cooler.

[0028] Optionally, in the above hydrogen production system, it further includes: a controller, the controller is respectively connected to the water electrolysis hydrogen production equipment, the gas analysis equipment and the alkali solution supply and regulation equipment;

[0029] The gas analysis device is used to send the gas analysis result to the controller;

[0030] The controller is used to determine the corresponding fault condition of the water electrolysis hydrogen production equipment according to the gas analysis result, and to collect the alkali solution flow rate of the water electrolysis hydrogen production equipment, so as to control the action of the alkali solution supply and regulation equipment according to the gas analysis result and the alkali solution flow rate.

[0031] Optionally, in the above-mentioned hydrogen production system, the controller is used to control the opening of the ball valve in the alkali solution supply regulating device according to the gas analysis result and the alkali solution flow rate;

[0032] Among them, when the gas analysis result indicates that the alkali concentration of the water electrolysis hydrogen production equipment is insufficient, and / or the alkali solution flow rate is less than the preset alkali solution circulation flow rate, the ball valve opening in the alkali solution supply and regulation device is increased; when the gas analysis result indicates that the alkali concentration of the water electrolysis hydrogen production equipment is too high and the alkali solution flow rate is greater than the preset alkali solution circulation flow rate, the ball valve opening in the alkali solution supply and regulation device is reduced.

[0033] Optionally, in the above-mentioned hydrogen production system, the water electrolysis hydrogen production equipment is an alkaline water electrolysis hydrogen production equipment, and the gas analysis equipment is an oxygen-hydrogen analyzer.

[0034] The invention provides a hydrogen production system, comprising: at least one water electrolysis hydrogen production device, which is used for electrolyzing water to generate hydrogen and oxygen, each water electrolysis hydrogen production device comprising a hydrogen-alkali mixture outlet and an oxygen-alkali mixture outlet; a gas analysis device and an alkali solution supply and regulation device are independently provided at the hydrogen-alkali mixture outlet or the oxygen-alkali mixture outlet of each water electrolysis hydrogen production device, the gas analysis device is used to analyze the hydrogen purity of the hydrogen-alkali mixture outlet or the oxygen purity of the oxygen-alkali mixture outlet of the water electrolysis hydrogen production device, and the alkali solution supply and regulation device is used to supply and regulate the alkali solution of the water electrolysis hydrogen production device, thereby solving the problem that the gases produced by each electrolyzer in the existing hydrogen production system are separated and analyzed by the same separator, the electrolyzer with deteriorated gas product purity in the hydrogen production system cannot be diagnosed, and further the faulty electrolyzer cannot be quickly located and isolated, and the alkali solution of the electrolyzer cannot be independently supplied and regulated, resulting in low hydrogen production efficiency of the electrolyzer in the hydrogen production system. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the structure of a hydrogen production system provided in this application;

[0037] Figures 2 to 7 Specific structural schematic diagrams of six hydrogen production systems provided in the embodiments of the present application;

[0038] Figure 8 A schematic diagram of the structure of another hydrogen production system provided in an embodiment of the present application;

[0039] Among them, there are electrolytic cell 1, hydrogen separator 2, oxygen separator 3, alkali liquid circulation pump 4, alkali liquid flow meter 5, alkali liquid cooler 6, solenoid valve 7, separator 8, magnetic flap level gauge 9, liquid collector 10, alkali tank 11, alkali replenishing pump 12, ball valve 13, stop valve 14, pressure reducing valve 15, and gas analyzer 16. DETAILED DESCRIPTION

[0040] 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.

[0041] An embodiment of the present application provides a hydrogen production system to solve the problem that the gases produced by each electrolyzer in the existing hydrogen production system are separated and analyzed by the same separator, and the electrolyzer with deteriorated gas product purity in the hydrogen production system cannot be diagnosed, and thus the faulty electrolyzer cannot be quickly located and isolated, and the alkaline solution in the electrolyzer cannot be independently replenished and adjusted, resulting in low hydrogen production efficiency of the electrolyzer in the hydrogen production system.

[0042] See also Figure 1 , the hydrogen production system comprises: at least one water electrolysis hydrogen production device 101, used for electrolyzing water to produce hydrogen and oxygen, each water electrolysis hydrogen production device 101 comprises a hydrogen-alkali mixture outlet and an oxygen-alkali mixture outlet;

[0043] Each hydrogen-alkali mixture outlet or oxygen-alkali mixture outlet of the water electrolysis hydrogen production equipment 101 is independently provided with a gas analysis device 102 and an alkali solution supply and regulation device 103. The gas analysis device 102 is used to analyze the hydrogen purity at the hydrogen-alkali mixture outlet or the oxygen purity at the oxygen-alkali mixture outlet of the water electrolysis hydrogen production equipment 101, and the alkali solution supply and regulation device 103 is used to supply and regulate the alkali solution of the water electrolysis hydrogen production equipment 101.

[0044] In some embodiments, Figure 2 As shown, the gas analysis device 102 may include: a solenoid valve 7, a separator 8, a liquid collector 10 and a gas analyzer 16;

[0045] The hydrogen-alkali mixture outlet or oxygen-alkali mixture outlet of the water electrolysis hydrogen production equipment 101 is connected to the inlet of the separator 8 through the solenoid valve 7;

[0046] The gas outlet of the separator 8 is connected to the gas analyzer 16, and the liquid outlet of the separator 8 is connected to the liquid collector 10;

[0047] The gas analyzer 16 is used to analyze the hydrogen purity at the outlet of the hydrogen-base mixture of the water electrolysis hydrogen production equipment 101, or the oxygen purity at the outlet of the oxygen-base mixture of the water electrolysis hydrogen production equipment 101;

[0048] The liquid collector 10 is used to store the liquid separated by the separator 8 .

[0049] In practical applications, when the hydrogen production system needs to use the gas analysis device 102 to analyze the purity of the gas produced by each water electrolysis hydrogen production device 101, the solenoid valve 7 can be controlled to open, and the gas produced by the water electrolysis hydrogen production device 101 enters the separator 8 through the hydrogen-alkali mixture outlet or the oxygen-alkali mixture outlet for separation and treatment. Since the hydrogen-alkali mixture outlet of the water electrolysis hydrogen production device 101 outputs a hydrogen-containing mixture, and the oxygen-alkali mixture outlet outputs an oxygen-containing mixture, in addition to oxygen and hydrogen, it may also be mixed with water vapor and alkali liquid, which needs to be processed by the separator 8 to achieve gas-liquid separation. After separation and treatment by the separator 8, the resulting hydrogen and oxygen can be analyzed for purity by the gas analyzer 16.

[0050] The separator 8 is a machine that can separate mixed substances into two or more different substances. Common separators 8 include centrifugal separators and electrostatic separators.

[0051] It should be noted that the gas analyzer 16 may specifically be an oxygen-hydrogen analyzer; of course, it is not limited thereto, and it may be an existing gas analyzer, such as a spectral gas analyzer, etc., all of which are within the protection scope of the present application.

[0052] It should also be noted that when the gas analyzer 16 is an oxygen-hydrogen analyzer, the gas analysis device 102 can be preferably arranged at the oxygen-alkali mixture outlet of the water electrolysis hydrogen production device 101, that is, Figures 2 to 7 shown.

[0053] In practical applications, such as Figure 3 , Figure 4 or Figure 5 As shown, the gas analysis device 102 may further include: a stop valve 14 and / or a pressure reducing valve 15 .

[0054] The gas outlet of the separator 8 is connected to a gas analyzer 16 through a stop valve 14 and a pressure reducing valve 15;

[0055] The stop valve 14 is used to control the gas outlet of the separator 8;

[0056] The pressure reducing valve 15 is used to control the gas pressure of the gas analyzer 16 .

[0057] Among them, the gas output from the separator 8 is decompressed by the pressure reducing valve 15 and then sent to the gas analyzer 16 for analysis and processing, which can ensure that the gas pressure entering the gas analyzer 16 meets the requirements and avoid damage to the gas analyzer 16 due to excessive gas pressure entering the gas analyzer 16.

[0058] Among them, after the stop valve 14 is set at the gas outlet of the separator 8, the switch of the stop valve 14 can be controlled in combination with the working needs of the gas analysis device 102. Specifically, when the gas analysis device 102 is required to analyze the gas purity, the stop valve 14 can be opened, and the gas outlet of the separator 8 enters the gas analysis device 102 through the stop valve 14 and the pressure reducing valve 15. When the gas analysis device 102 is not required to analyze the gas purity, the stop valve 14 can be closed.

[0059] It should be noted that the connection method between the stop valve 14 and the gas outlet of the separator 8 can be one of flange connection, threaded connection, and welding connection, which can be determined according to the application environment and is within the protection scope of this application. Similarly, the connection method between the pressure reducing valve 15 and the gas analyzer 16 can also be one of flange connection, threaded connection, and welding connection, which can be determined according to the application environment and is within the protection scope of this application.

[0060] It should also be noted that the gas flow entering the gas analysis device 102 can also be adjusted by the stop valve 14 to meet the gas flow requirement of the gas analysis device 102 .

[0061] In practical applications, such as Figure 6 As shown, the gas analysis device 102 may further include: a magnetic flap level gauge 9 , which is used to measure the liquid level of the medium in the separator 8 .

[0062] In order to detect the medium level in the separator 8, a magnetic flap level gauge 9 may be provided in the separator 8 to ensure that the medium level in the separator 8 does not exceed the warning level, thereby ensuring that the gas and liquid separation process of the separator 8 meets the requirements.

[0063] It should be noted that the magnetic flap level gauge 9, which can also be called a magnetic float level gauge, is developed based on the buoyancy principle and magnetic coupling. When the liquid level in the measured container rises or falls, the magnetic float in the body tube of the level gauge also rises or falls accordingly, and the permanent magnet in the float is transmitted to the magnetic flip column indicator through magnetic coupling, driving the red and white flip columns to flip 180°. When the liquid level rises, the flip column changes from white to red, and when the liquid level drops, the flip column changes from red to white. The red and white junction of the indicator is the actual height of the liquid level inside the container, thereby achieving a clear indication of the liquid level.

[0064] In some embodiments, Figures 3 to 6 As shown, the alkali solution supply and regulation equipment 103 mainly includes: an alkali tank 11, an alkali replenishment pump 12 and a ball valve 13.

[0065] The liquid collector 10 in the gas analysis device 102 is connected to the liquid outlet of the hydrogen separator 2 or the liquid outlet of the oxygen separator 3 of the water electrolysis hydrogen production device 101 through the alkali tank 11, the alkali replenishment pump and the ball valve 13 in sequence.

[0066] The alkali tank 11 is used at least to store the alkali solution in the liquid collector 10 .

[0067] In practice, the alkali tank 11 can store not only the alkali solution separated from the liquid collector 10 , but also spare alkali solution, which can be determined according to the application environment and user needs, and is within the protection scope of the present application.

[0068] The alkali replenishing pump 12 is used to replenish the alkali solution of the water electrolysis hydrogen production equipment 101.

[0069] In practical applications, when the alkali concentration of the water electrolysis hydrogen production equipment 101 in the hydrogen production system does not meet the requirements, alkali can be replenished by taking alkali from the alkali tank 11 through the alkali replenishment pump 12 to make the alkali concentration of the water electrolysis hydrogen production equipment 101 meet the requirements, ensuring that the water electrolysis hydrogen production equipment 101 is in a high gas preparation efficiency.

[0070] The ball valve 13 is used to adjust the flow rate of the supplied alkali solution.

[0071] The ball valve 13 is disposed at the outlet of the alkali replenishment pump 12 in the alkali replenishment regulating device 103 , and is used to regulate the alkali flow rate output by the alkali replenishment pump 12 .

[0072] Specifically, the ball valve 13 in this solution is generally installed horizontally, and can be closed tightly by only rotating it 90° and with a very small rotational force.

[0073] It should be noted that the alkali tank 11 , the alkali replenishment pump 12 and the ball valve 13 can form an alkali liquid replenishment branch to participate in the alkali liquid circulation of the water electrolysis hydrogen production equipment 101 .

[0074] In some embodiments, Figures 3 to 6 As shown, the water electrolysis hydrogen production equipment 101 may include: an electrolyzer 1, an oxygen separator 3, a hydrogen separator 2, an alkali solution circulation pump 4 and an alkali solution cooler 6;

[0075] The hydrogen-alkali mixture outlet of the electrolyzer 1 is connected to the inlet pipeline of the hydrogen separator 2; the oxygen-alkali mixture outlet of the electrolyzer 1 is connected to the inlet pipeline of the oxygen separator 3;

[0076] The inlet of the alkali liquid circulation pump 4 is connected to the liquid outlet of the hydrogen separator 2 and the liquid outlet pipeline of the oxygen separator 3 respectively, the outlet of the alkali liquid circulation pump 4 is connected to the inlet pipeline of the alkali liquid cooler 6, and the outlet of the alkali liquid cooler 6 is connected to the alkali liquid inlet pipeline of the electrolyzer 1.

[0077] In practical applications, the hydrogen separator 2 can perform gas-liquid separation on the hydrogen-containing mixture at the outlet of the hydrogen-alkali mixture of the electrolyzer 1, and the separated liquid flows back to the alkali liquid circulation pump 4 to be supplied to the electrolyzer 1 again; similarly, the oxygen separator 3 can perform gas-liquid separation on the oxygen-containing mixture at the outlet of the oxygen-alkali mixture of the electrolyzer 1, and the separated liquid flows back to the alkali liquid circulation pump 4 to be supplied to the electrolyzer 1 again.

[0078] It should be noted that the water electrolysis hydrogen production equipment 101 is an alkaline water electrolysis hydrogen production equipment, that is, the electrolytic cell 1 is an alkaline electrolytic cell; of course, it is not limited to this, and can also be determined according to the application environment and user needs, all within the protection scope of this application.

[0079] In some embodiments, Figure 7 As shown, the water electrolysis hydrogen production equipment 101 may further include: an alkali liquid flow meter 5 , which is arranged in a pipeline between the alkali liquid circulation pump 4 and the alkali liquid cooler 6 .

[0080] The alkali liquid flow meter 5 may be arranged in a pipeline between the outlet of the alkali liquid circulation pump 4 and the inlet of the alkali liquid cooler 6 .

[0081] It should be noted that one of the purposes of setting the alkali liquid flowmeter 5 at the outlet of the alkali liquid circulation pump 4 is to be able to know the flow rate of alkali liquid flowing into the alkali liquid cooler 6, so as to control the flow rate of the heat exchange medium in the alkali liquid cooler 6 to ensure that the alkali liquid cooler 6 can cool the alkali liquid to a specified temperature.

[0082] In some embodiments, Figure 8 As shown, the hydrogen production system may further include: a controller 104, which is respectively connected to the water electrolysis hydrogen production equipment 101, the gas analysis equipment 102 and the alkali solution supply and regulation equipment 103.

[0083] The gas analysis device 102 is used to send the gas analysis result to the controller, and the controller determines the fault condition of the corresponding water electrolysis hydrogen production device 101 according to the gas analysis result.

[0084] In practical applications, since the gas analysis equipment 102 can be used to analyze the purity of the gas produced by the water electrolysis hydrogen production equipment 101, when the gas analysis result indicates that the gas purity does not meet the preset gas purity, it can be deduced that the corresponding water electrolysis hydrogen production equipment 101 has a fault, so that relevant personnel can locate and isolate the water electrolysis hydrogen production equipment 101, thereby improving the intelligence level of alkaline water electrolysis hydrogen production equipment, avoiding the shutdown of normally operating electrolytic cells, and increasing the utilization hours of hydrogen production equipment.

[0085] The controller is used to collect the alkali solution flow rate of the water electrolysis hydrogen production equipment 101, and control the operation of the alkali solution supply regulating equipment 103 according to the gas analysis result and the alkali solution flow rate.

[0086] In practical applications, the controller is used to control the opening of the ball valve 13 in the alkali solution supply regulating device 103 according to the gas analysis results and the alkali solution flow rate. When the gas analysis results indicate that the alkali solution concentration of the water electrolysis hydrogen production equipment 101 is insufficient, and / or the alkali solution flow rate is less than the preset alkali solution circulation flow rate, the opening of the ball valve 13 in the alkali solution supply regulating device 103 is increased; when the gas analysis results indicate that the alkali solution concentration of the water electrolysis hydrogen production equipment 101 is too high and the alkali solution flow rate is greater than the preset alkali solution circulation flow rate, the opening of the ball valve 13 in the alkali solution supply regulating device 103 is reduced.

[0087] Specifically, when the gas purity in the gas analysis result is lower than the preset gas purity, or the alkali concentration is lower than the preset alkali concentration, it indicates that the alkali concentration of the water electrolysis hydrogen production equipment 101 is insufficient. The specific value of the preset alkali concentration can be determined according to the relevant parameters of the water electrolysis hydrogen production equipment 101, and this application does not make specific limitations, and all are within the protection scope of this application.

[0088] In specific applications, the opening of the ball valve 13 corresponding to the electrolytic water hydrogen production equipment 101 in various states can be determined by pre-calibration; after the gas analysis results and the alkali solution flow rate are known, the corresponding opening of the ball valve 13 can be found for control.

[0089] It should be noted that the preset alkali solution circulation flow rate can also be determined according to relevant parameters of the water electrolysis hydrogen production equipment 101, and this application does not make specific limitations and is within the protection scope of this application.

[0090] It should also be noted that when the water electrolysis hydrogen production equipment 101 is an alkaline water electrolysis hydrogen production equipment, that is, the electrolyzer 1 is an alkaline electrolyzer, the connecting pipes and valves in the hydrogen production system may preferably consider corrosion-resistant devices to reduce the corrosion of the mixed alkaline solution to the pipes and devices during the hydrogen production process, thereby improving the operating safety and stability of the hydrogen production system.

[0091] It should be noted that Figures 2 to 7 Taking the example of the gas analysis equipment 102 and the alkali solution supply and regulation equipment 103 being arranged at the oxygen-alkali mixture outlet of the water electrolysis hydrogen production equipment 101, in practice, the gas analysis equipment 102 and the alkali solution supply and regulation equipment 103 can also be arranged at the hydrogen-alkali mixture outlet of the water electrolysis hydrogen production equipment 101, which can be determined according to the application environment and user needs, and are all within the protection scope of the present application.

[0092] Based on the above principle, the hydrogen production system provided in this embodiment includes: at least one water electrolysis hydrogen production equipment 101, which is used to electrolyze water to produce hydrogen and oxygen, and each water electrolysis hydrogen production equipment 101 includes a hydrogen-alkali mixture outlet and an oxygen-alkali mixture outlet; the hydrogen-alkali mixture outlet or the oxygen-alkali mixture outlet of each water electrolysis hydrogen production equipment 101 is independently provided with a gas analysis device 102 and an alkali liquid supply and regulation device 103, the gas analysis device 102 is used to analyze the hydrogen purity of the hydrogen-alkali mixture outlet or the oxygen purity of the oxygen-alkali mixture outlet of the water electrolysis hydrogen production equipment 101, and the alkali liquid supply and regulation device 103 is used to supply and regulate the alkali liquid of the water electrolysis hydrogen production equipment 101, which solves the problem that the gas produced by each electrolyzer in the existing hydrogen production system is separated and analyzed by the same separator, and the electrolyzer with poor gas product purity in the hydrogen production system cannot be diagnosed, and thus the faulty electrolyzer cannot be quickly located and isolated, and the electrolyzer alkali liquid cannot be independently supplied and regulated, resulting in low hydrogen production efficiency of the electrolyzer in the hydrogen production system.

[0093] The features recorded in the various embodiments in this specification can be replaced or combined with each other, and the same and similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The system and system embodiments described above are only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work. Professionals can also further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented in electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0094] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0095] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A hydrogen production system, characterized in that: include: At least one water electrolysis hydrogen production device, used for electrolyzing water to produce hydrogen and oxygen, each of the water electrolysis hydrogen production devices comprising a hydrogen-alkali mixture outlet and an oxygen-alkali mixture outlet; A gas analysis device and an alkali solution supply and regulation device are independently provided at the hydrogen-alkali mixture outlet or the oxygen-alkali mixture outlet of each of the water electrolysis hydrogen production equipment. The gas analysis device is used to analyze the hydrogen purity at the hydrogen-alkali mixture outlet or the oxygen purity at the oxygen-alkali mixture outlet of the water electrolysis hydrogen production equipment, and the alkali solution supply and regulation device is used to supply and regulate the alkali solution of the water electrolysis hydrogen production equipment.

2. The hydrogen production system according to claim 1, characterized in that: The gas analysis equipment comprises: a solenoid valve, a separator, a liquid collector and a gas analyzer; The hydrogen-alkali mixture outlet or the oxygen-alkali mixture outlet of the water electrolysis hydrogen production equipment is connected to the inlet of the separator through the solenoid valve; The gas outlet of the separator is connected to the gas analyzer, and the liquid outlet of the separator is connected to the liquid collector; The gas analyzer is used to analyze the hydrogen purity at the outlet of the hydrogen-base mixture of the water electrolysis hydrogen production equipment, or the oxygen purity at the outlet of the oxygen-base mixture of the water electrolysis hydrogen production equipment; The liquid collector is used to store the liquid separated by the separator.

3. The hydrogen production system according to claim 2, characterized in that: The gas analysis equipment further comprises: a stop valve and / or a pressure reducing valve; The gas outlet of the separator is connected to the gas analyzer through the stop valve and the pressure reducing valve; The stop valve is used to control the gas outlet of the separator; The pressure reducing valve is used to control the gas pressure of the gas analyzer.

4. The hydrogen production system according to claim 2, characterized in that: The gas analysis equipment further comprises: a magnetic flap level gauge, which is used to measure the medium level in the separator.

5. The hydrogen production system according to claim 1, characterized in that: The alkali solution supply and regulation equipment comprises: an alkali tank, an alkali supply pump and a ball valve; The liquid collector in the gas analysis device is connected to the liquid outlet of the hydrogen separator or the liquid outlet of the oxygen separator of the water electrolysis hydrogen production device through the alkali tank, the alkali replenishment pump and the ball valve in sequence; The alkali tank is at least used to store the alkali solution in the liquid collector; The alkali replenishing pump is used to replenish the alkali solution of the water electrolysis hydrogen production equipment; The ball valve is used to adjust the flow rate of the supplied alkali solution.

6. The hydrogen production system according to claim 1, characterized in that: The water electrolysis hydrogen production equipment comprises: an electrolyzer, an oxygen separator, a hydrogen separator, an alkali solution circulation pump and an alkali solution cooler; The hydrogen-alkali mixture outlet of the electrolyzer is connected to the inlet pipeline of the hydrogen separator; the oxygen-alkali mixture outlet of the electrolyzer is connected to the inlet pipeline of the oxygen separator; The inlet of the alkali liquid circulation pump is connected to the liquid outlet of the hydrogen separator and the liquid outlet pipeline of the oxygen separator respectively, the outlet of the alkali liquid circulation pump is connected to the inlet pipeline of the alkali liquid cooler, and the outlet of the alkali liquid cooler is connected to the alkali liquid inlet pipeline of the electrolyzer.

7. The hydrogen production system according to claim 6, characterized in that: The water electrolysis hydrogen production equipment also includes: an alkali liquid flow meter, which is arranged in the pipeline between the alkali liquid circulation pump and the alkali liquid cooler.

8. The hydrogen production system according to any one of claims 1 to 7, characterized in that: Also includes: A controller, wherein the controller is respectively connected to the water electrolysis hydrogen production equipment, the gas analysis equipment and the alkali solution supply and regulation equipment; The gas analysis device is used to send the gas analysis result to the controller; The controller is used to determine the corresponding fault condition of the water electrolysis hydrogen production equipment according to the gas analysis result, and to collect the alkali solution flow rate of the water electrolysis hydrogen production equipment, so as to control the action of the alkali solution supply and regulation equipment according to the gas analysis result and the alkali solution flow rate.

9. The hydrogen production system according to claim 8, characterized in that: The controller is used to control the opening of the ball valve in the alkali solution supply regulating device according to the gas analysis result and the alkali solution flow rate; Among them, when the gas analysis result indicates that the alkali concentration of the water electrolysis hydrogen production equipment is insufficient, and / or the alkali solution flow rate is less than the preset alkali solution circulation flow rate, the ball valve opening in the alkali solution supply and regulation device is increased; when the gas analysis result indicates that the alkali concentration of the water electrolysis hydrogen production equipment is too high and the alkali solution flow rate is greater than the preset alkali solution circulation flow rate, the ball valve opening in the alkali solution supply and regulation device is reduced.

10. The hydrogen production system according to any one of claims 1 to 7, characterized in that: The water electrolysis hydrogen production equipment is alkaline water electrolysis hydrogen production equipment, and the gas analysis equipment is an oxygen hydrogen analyzer.

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