Self-suction capillary liquid supply water electrolysis hydrogen production system

Abstract

The invention provides a self-suction capillary liquid supply water electrolysis hydrogen production system. The self-suction capillary liquid supply water electrolysis hydrogen production system comprises a self-suction capillary liquid supply electrolytic bath, a direct-current power supply, an alkali liquor box and a circulating pump, the direct-current power supply supplies power to the self-suction capillary liquid supply electrolytic bath; two ends of the alkali liquor box are respectively connected with an alkali liquor inlet and an alkali liquor outlet of the self-suction capillary liquid supply electrolytic bath; and the circulating pump is connected in series between the self-suction capillary liquid supply electrolytic bath and the alkali liquor outlet. Power is supplied to the self-suction capillary liquid supply electrolytic bath through the direct-current power supply, alkali liquor is circulated through the circulating pump, and the technical problem that in the prior art, equipment for producing hydrogen through the self-suction capillary liquid supply electrolytic bath is lacked is solved.

Description

Technical field:

[0001] The invention relates to the field of hydrogen production equipment, in particular to a water electrolysis hydrogen production system with self-priming capillary liquid supply. Background technology:

[0002] Under the background of the "dual carbon" strategy, the country has vigorously developed renewable energy and advocated green, environmentally friendly and low-carbon. Hydrogen, as a green and renewable energy, has attracted much attention. Hydrogen energy has many advantages such as high energy density, simple storage method, clean and efficient, and wide application, providing a solution for the large-scale consumption of renewable energy. The development of hydrogen energy is an important way to improve energy utilization, achieve the "dual carbon" goal, and build a new energy supply system.

[0003] Among the many hydrogen production technologies, water electrolysis hydrogen production technology is highly favored because it can achieve safe and efficient hydrogen production. The carbon emissions of hydrogen production through water electrolysis are close to zero, which is an important means to achieve carbon neutrality. Water electrolysis hydrogen production technologies include traditional alkaline water electrolysis (AWE) hydrogen production, proton exchange membrane (PEM) water electrolysis hydrogen production, anion exchange membrane (AEM) water electrolysis hydrogen production, high-temperature solid oxide water electrolysis (SOE) hydrogen production technology, etc. The hydrogen evolution electrode and oxygen evolution electrode in the traditional alkaline hydrogen production electrolyzer are both immersed in the electrolyte, and hydrogen and oxygen are produced on the electrode surface in the form of bubbles, which requires overcoming large desorption resistance. At the same time, the gas adheres to occupy the active sites of the electrode, increasing the hydrogen evolution / oxygen evolution overpotential, resulting in an increase in the electrolysis voltage. The generated gas has a high water content, so a separator needs to be added to the system to separate the gas and water, resulting in low energy efficiency and complex system problems. The PEM electrolyzer has an oxygen-side electrolyte circulation. Compared with the traditional alkaline electrolyzer, only the oxygen evolution needs to overcome resistance, so the energy efficiency is improved.

[0004] There is an urgent need for a water electrolysis hydrogen production system with a self-priming capillary liquid supply, which helps to solve the technical problem of the lack of a hydrogen production equipment through a self-priming capillary liquid supply electrolyzer in the prior art. Summary of the invention:

[0005] In one embodiment, the present invention provides a water electrolysis hydrogen production system with a self-priming capillary liquid supply. The self-priming capillary liquid supply electrolyzer is powered by a DC power supply, and a circulating pump circulates the alkaline solution, which helps to solve the technical problem in the prior art of lacking a hydrogen production device using a self-priming capillary liquid supply electrolyzer.

[0006] The self-priming capillary liquid supply water electrolysis hydrogen production system comprises a self-priming capillary liquid supply electrolyzer, a DC power supply, an alkali liquid tank and a circulation pump;

[0007] The DC power supply supplies power to the self-priming capillary liquid supply electrolytic cell;

[0008] The two ends of the alkali solution box are respectively connected to the alkali solution inlet and the alkali solution outlet of the self-priming capillary liquid supply electrolytic cell;

[0009] The circulation pump is connected in series between the self-priming capillary liquid supply electrolytic cell and the alkali solution outlet.

[0010] In one embodiment, the self-priming capillary liquid supply water electrolysis hydrogen production system further includes a radiator;

[0011] The radiator is connected in series between the alkali solution outlet and the alkali solution tank.

[0012] In one embodiment, the self-priming capillary liquid supply water electrolysis hydrogen production system further includes a filter;

[0013] The filter is connected in series with the alkali liquid tank and the radiator.

[0014] In one embodiment, the hydrogen outlet of the self-priming capillary liquid-supply electrolyzer is connected to an analyzer.

[0015] In one embodiment, the self-priming capillary liquid supply water electrolysis hydrogen production system further includes a control console;

[0016] The control console is used to control the DC power supply, and the DC power supply is a DC switching power supply.

[0017] In one embodiment, the alkali solution concentration in the alkali solution tank is within a range of 10%-30%.

[0018] In one embodiment, when the temperature rises to 50-80° C., the heat sink is turned on and the system temperature is maintained within a set range.

[0019] In one embodiment, the hydrogen outlet is divided into two routes, one route reaches the hydrogen sampling port by connecting to the check valve, and the other route reaches the hydrogen venting port by connecting to the first stop valve.

[0020] In one embodiment, the oxygen outlet of the self-priming capillary liquid supply electrolyzer is divided into two routes, one route reaches the oxygen venting port through the second stop valve, and the other route is connected to the analyzer through the third stop valve.

[0021] In one embodiment, a fourth stop valve, a fifth stop valve, a sixth stop valve, a seventh stop valve, and an eighth stop valve are provided between the electrolytic cell and the circulation pump, between the circulation pump and the alkali liquid tank, between the alkali liquid tank and the filter, between the filter and the radiator, and between the radiator and the electrolytic cell. Description of the drawings:

[0022] Figure 1 Schematic diagram of a water electrolysis hydrogen production system with self-priming capillary liquid supply in one embodiment of the present invention.

[0023] Reference numerals:

[0024] Self-priming capillary liquid supply electrolytic cell 1

[0025] Check valve 14

[0026] First stop valve 15

[0027] Second stop valve 16

[0028] The third stop valve 17

[0029] Fourth stop valve 13

[0030] Fifth stop valve 9

[0031] Sixth stop valve 7

[0032] Seventh stop valve 5

[0033] Eighth stop valve 2

[0034] Alkali Import 101

[0035] Alkali liquid outlet 102

[0036] DC power supply 12

[0037] Console 3

[0038] Radiator 4

[0039] Filter 6

[0040] Lye tank 8

[0041] Circulation pump 10

[0042] Analyzer 18 Specific embodiment:

[0043] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0045] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0046] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0047] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0048] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0049] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0050] In response to the above-mentioned problems of large gas desorption resistance, high electrolysis energy consumption and complex system, this patent introduces a new water electrolysis hydrogen production system, specifically a water electrolysis hydrogen production system with self-priming capillary liquid supply. The electrolyte is transported to the porous electrode through capillary induction, and the generated gas is directly discharged through the gas outlet of the electrolyzer. There is no bubble precipitation on the electrode. The water electrolysis hydrogen production system does not require a separator, has a simple system structure and high electrolysis efficiency, which is of great significance for reducing energy consumption and improving economic benefits.

[0051] The present invention provides a water electrolysis hydrogen production system with self-priming capillary liquid supply, in which electrolyte is transported to a porous electrode by capillary induction, and the generated gas is directly discharged through a gas outlet of an electrolyzer. The water electrolysis hydrogen production system does not require a separator, has a simple system structure, and has high electrolysis efficiency.

[0052] Figure 1 Schematic diagram of a water electrolysis hydrogen production system with self-priming capillary liquid supply in one embodiment of the present invention. Figure 1 As shown, the present invention provides a self-priming capillary liquid supply water electrolysis hydrogen production system, the self-priming capillary liquid supply water electrolysis hydrogen production system comprises a self-priming capillary liquid supply electrolyzer 1, a DC power supply 12, an alkali liquid tank 8, and a circulation pump 10;

[0053] The DC power supply 12 supplies power to the self-priming capillary liquid supply electrolytic cell 1;

[0054] The two ends of the alkali liquid box 8 are respectively connected to the alkali liquid inlet 101 and the alkali liquid outlet 102 of the self-priming capillary liquid supply electrolytic cell 1;

[0055] The circulation pump 10 is connected in series between the self-priming capillary liquid supply electrolytic cell 1 and the alkali solution outlet 101 .

[0056] In this embodiment, a specific implementation of a self-priming capillary liquid supply water electrolysis hydrogen production system is provided. In this solution, an alkali liquid tank 8 is added to provide the system with alkali liquid required for electrolysis, and the electrolyte is transported to the porous electrode through capillary induction. The generated gas is directly discharged through the gas outlet of the electrolyzer, which helps to solve the technical problem of the lack of a hydrogen production device through a self-priming capillary liquid supply electrolyzer in the prior art.

[0057] In one embodiment, the self-priming capillary liquid supply water electrolysis hydrogen production system further includes a radiator 4;

[0058] The radiator 4 is connected in series between the alkali solution outlet 102 and the alkali solution tank 8. The liquid outlet of the electrolytic cell is connected to the liquid inlet of the alkali solution tank through the circulating pump, the liquid outlet of the alkali solution tank is connected to the radiator through the filter, and the radiator is connected to the liquid inlet of the electrolytic cell to form an electrolyte circulation loop.

[0059] In this embodiment, a specific connection method of the radiator 4 is provided.

[0060] In one embodiment, the self-priming capillary liquid supply water electrolysis hydrogen production system further includes a filter 6;

[0061] The filter 6 is connected in series to the alkali liquid tank 8 and the radiator 4 .

[0062] The filter 6 in this embodiment is used for system filtering.

[0063] In one embodiment, the hydrogen outlet of the self-priming capillary liquid-supply electrolyzer 1 is connected to an analyzer 18 .

[0064] The analyzer 18 is used to analyze the electrolysis status in the system in real time.

[0065] In one embodiment, the self-priming capillary liquid supply water electrolysis hydrogen production system further includes a control console 3;

[0066] The control console 3 is used to control the DC power supply 12, which is a DC switching power supply.

[0067] In one embodiment, the alkali solution concentration in the alkali solution tank is within a range of 10%-30%.

[0068] In this embodiment, a use range of alkali solution solubility is provided.

[0069] In one embodiment, when the temperature rises to 50-80° C., the heat sink is turned on and the system temperature is maintained within a set range.

[0070] In this embodiment, a temperature range for heat sink control is provided.

[0071] In one embodiment, the hydrogen outlet is divided into two routes, one route reaches the hydrogen sampling port (B) by connecting to the check valve 14, and the other route reaches the hydrogen venting port (C) by connecting to the first stop valve 15.

[0072] In this embodiment, a specific implementation of a stop valve connection is provided.

[0073] In one embodiment, the oxygen outlet of the self-priming capillary liquid supply electrolyzer is divided into two routes, one route reaches the oxygen vent (D) through the second stop valve 16, and the other route is connected to the analyzer through the third stop valve 17.

[0074] In this embodiment, a specific connection method for the oxygen outlet of an electrolyzer is provided.

[0075] In one embodiment, a fourth stop valve 13, a fifth stop valve 9, a sixth stop valve 7, a seventh stop valve 5, and an eighth stop valve 2 are provided between the self-priming capillary liquid supply electrolytic cell 1 and the circulation pump 10, between the circulation pump 10 and the alkali liquid tank 8, between the alkali liquid tank 8 and the filter 6, between the filter 6 and the radiator 4, and between the radiator 4 and the self-priming capillary liquid supply electrolytic cell 1.

[0076] In this embodiment, a specific connection implementation of a stop valve is provided.

[0077] Based on the above equipment:

[0078] The self-priming capillary liquid supply electrolyzer has a hydrogen outlet, an oxygen outlet, and an electrolyte inlet and outlet. The alkali liquid tank has an alkali liquid inlet and outlet and a water supply port. The circulating pump is used to promote the circulation of the system electrolyte. The filter is used to filter the impurity particles in the electrolyte. The radiator is used to take away the heat generated by the electrolyzer and maintain the operating temperature of the system. The DC switching power supply provides the capillary liquid supply electrolyzer with the current required for electrolysis. The control console is used to realize power supply monitoring, analyzer monitoring and control, temperature monitoring, and liquid level monitoring. The analyzer is used to analyze the purity of the product oxygen to ensure the safety of the device. The hydrogen production part adopts the hydrogen production method of electrolyzing water to prepare hydrogen.

[0079] The self-priming capillary liquid supply electrolyzer has a hydrogen outlet, an oxygen outlet, and an electrolyte inlet and outlet. The alkali liquid tank has an alkali liquid inlet and outlet and a water supply port. The circulating pump is used to promote the circulation of the system electrolyte. The filter is used to filter the impurity particles in the electrolyte. The radiator is used to take away the heat generated by the electrolyzer and maintain the operating temperature of the system. The DC switching power supply provides the capillary liquid supply electrolyzer with the current required for electrolysis. The control console is used to realize power supply monitoring, analyzer monitoring and control, temperature monitoring, and liquid level monitoring. The analyzer is used to analyze the purity of the product oxygen to ensure the safety of the device.

[0080] The present invention has the following beneficial effects:

[0081] 1. The self-priming capillary liquid supply water electrolysis hydrogen production system provided by the present invention uses a self-priming capillary liquid supply electrolyzer as a water electrolysis site, and the generated gas is directly discharged through the gas outlet of the electrolyzer without overcoming desorption resistance and will not occupy the active sites of the electrode. The electrolysis efficiency is high, which is of great significance for reducing energy consumption and improving economic benefits.

[0082] 2. The self-priming capillary liquid supply water electrolysis hydrogen production system provided by the present invention does not require a separator. Compared with the traditional water electrolysis method, its system structure is simple and the cost is reduced.

[0083] The self-priming capillary liquid supply electrolyzer has a hydrogen outlet, an oxygen outlet, and an electrolyte inlet and outlet. The alkali liquid tank has an alkali liquid inlet and outlet and a water supply port, which provides the system with the alkali liquid required for electrolysis, and the alkali liquid solubility is in the range of 10%-30%. The circulating pump is used to promote the circulation of the system electrolyte. The filter is used to filter the impurity particles in the electrolyte, and the impurity particles include catalyst particles, impurities in the pipeline, etc. The radiator is used to take away the heat generated by the electrolyzer to maintain the operating temperature of the system. When the system temperature is low, the radiator is in a closed state. As the electrolysis occurs, the electrolyzer continuously generates heat, causing the system temperature to continue to rise. When the temperature rises to 50-80°C, the radiator is turned on and the system temperature is maintained within the set range. The DC switching power supply provides the capillary liquid supply electrolyzer with the current required for electrolysis. The console is used to realize power supply monitoring, analyzer monitoring and control, temperature monitoring, and liquid level monitoring. The analyzer is used to analyze the purity of the product oxygen to ensure the safety of the device.

[0084] The hydrogen outlet of the self-priming capillary liquid supply electrolyzer is divided into two paths, one path reaches the hydrogen sampling port (B) through the connection check valve (14), and the other path reaches the hydrogen venting port (C) through the connection stop valve (15).

[0085] The oxygen outlet of the self-priming capillary liquid supply electrolyzer is divided into two paths, one path reaches the oxygen venting port (D) through the connecting stop valve (16), and the other path is connected to the analyzer through the stop valve (17).

[0086] The self-priming capillary liquid supply electrolytic cell is connected to a DC switching power supply.

[0087] The DC switching power supply is connected to the console to realize system control.

[0088] The liquid outlet of the electrolytic cell is connected to the liquid inlet of the alkali liquid box through the circulating pump, the liquid outlet of the alkali liquid box is connected to the radiator through the filter, and the radiator is connected to the liquid inlet of the electrolytic cell to form an electrolyte circulation loop.

[0089] The stop valves (13, 9, 7, 5, 2) are arranged between the electrolytic cell and the circulation pump, between the circulation pump and the alkali liquid tank, between the alkali liquid tank and the filter, between the filter and the radiator, and between the radiator and the electrolytic cell.

[0090] The water replenishment port of the alkali liquid tank is connected to the water replenishment valve (11), and the outlet (A) of the water replenishment valve is connected to the atmosphere. As the electrolyte is continuously consumed during the operation of the system, pure water needs to be regularly replenished into the system. The control console monitors the liquid level of the alkali liquid tank, and when the liquid level is lower than the set value, it prompts to replenish water.

[0091] Compared with the traditional water electrolysis hydrogen production system, the gas generated by this system does not need to overcome the desorption resistance and can be directly desorbed from the electrode surface. Therefore, there is no need for hydrogen separators and oxygen separators in the system, which reduces costs. At the same time, the electrolysis efficiency is improved, which is of great significance for reducing energy consumption and improving economic benefits.

[0092] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A water electrolysis hydrogen production system with self-priming capillary liquid supply, characterized in that: The self-priming capillary liquid supply water electrolysis hydrogen production system comprises: A self-priming capillary liquid supply electrolytic cell (1); A direct current power supply (12) for supplying power to the self-priming capillary liquid supply electrolytic cell (1); An alkali solution box (8), two ends of which are respectively connected to the alkali solution inlet (101) and the alkali solution outlet (102) of the self-priming capillary liquid supply electrolytic cell (1); A circulation pump (10) is connected in series between the self-priming capillary liquid supply electrolytic cell (1) and the alkali solution outlet (101).

2. The water electrolysis hydrogen production system with self-priming capillary liquid supply according to claim 1 is characterized in that: The self-priming capillary liquid supply water electrolysis hydrogen production system also includes: A radiator (4) is connected in series between the alkali solution outlet (102) and the alkali solution tank (8).

3. The water electrolysis hydrogen production system with self-priming capillary liquid supply according to claim 2 is characterized in that: The self-priming capillary liquid supply water electrolysis hydrogen production system also includes: A filter (6) is connected in series between the alkali liquid tank (8) and the radiator (4).

4. The water electrolysis hydrogen production system with self-priming capillary liquid supply according to claim 3 is characterized in that: The hydrogen outlet of the self-priming capillary liquid-supply electrolyzer (1) is connected to an analyzer (18).

5. The water electrolysis hydrogen production system with self-priming capillary liquid supply according to claim 4 is characterized in that: The self-priming capillary liquid supply water electrolysis hydrogen production system also includes: A control console (3) is used to control the DC power supply (12), wherein the DC power supply (12) is a DC switching power supply.

6. The water electrolysis hydrogen production system with self-priming capillary liquid supply according to claim 5 is characterized in that: The alkali concentration of the alkali liquid box is within a range of 10%-30%.

7. The water electrolysis hydrogen production system with self-priming capillary liquid supply according to claim 6 is characterized in that: When the temperature rises to 50-80℃, the radiator turns on and the system temperature is maintained within the set range.

8. The water electrolysis hydrogen production system with self-priming capillary liquid supply according to claim 7 is characterized in that: The hydrogen outlet is divided into two routes, one route reaches the hydrogen sampling port (B) by connecting to the check valve (14), and the other route reaches the hydrogen venting port (C) by connecting to the first stop valve (15).

9. The water electrolysis hydrogen production system with self-priming capillary liquid supply according to claim 8, characterized in that: The oxygen outlet of the self-priming capillary liquid supply electrolyzer is divided into two paths, one path reaches the oxygen vent (D) through the second stop valve (16), and the other path is connected to the analyzer through the third stop valve (17).

10. The water electrolysis hydrogen production system with self-priming capillary liquid supply according to claim 9, characterized in that: A fourth stop valve (13), a fifth stop valve (9), a sixth stop valve (7), a seventh stop valve (5), and an eighth stop valve (2) are arranged between the electrolytic cell and the circulation pump, between the circulation pump and the alkali liquid tank, between the alkali liquid tank and the filter, between the filter and the radiator, and between the radiator and the electrolytic cell.

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