CN117867545A - A closed modular electrolytic cell and method for producing hydrogen by electrolyzing water - Google Patents

Abstract

The invention discloses an electrolytic tank and a method for closed modularized water electrolysis hydrogen production, belonging to the technical field of water electrolysis; the anode chamber and the cathode chamber are separated by the ion exchange membrane, and are connected with an electrolytic piece component for electrolyzing water, the anode chamber and the cathode chamber are provided with liquid inlet holes and air collecting holes, and each electrolytic chamber is arranged into a prefabricated independent partition through a modularized design, so that the electrolytic tank can cope with relatively complex actual industrial production environments. Compared with the traditional integrated electrolytic tank, the tank body is more flexible to set, and can be freely combined and matched according to actual production requirements; the electrolytic tank has simple structure and principle, convenient disassembly and assembly, convenient movement and strong practicability, can save the production cost, improves the purity of the product gas, and has good popularization and application values.

Description

A closed modular electrolytic cell and method for producing hydrogen by electrolyzing water

Technical Field

The invention belongs to the technical field of water electrolysis, and in particular relates to a closed modular electrolytic cell and method for producing hydrogen by water electrolysis.

Background technique

Hydrogen energy, whether used as an energy carrier or directly as a fuel, will become a major pillar of the future energy system. Hydrogen production by water electrolysis is an extremely superior hydrogen production technology that can directly obtain high-purity hydrogen. Using intermittent energy such as solar energy and wind energy to generate electricity, and then electrolyzing water to produce hydrogen that can be stored and transported is considered to be one of the effective ways to solve today's environmental pollution problems.

Alkaline water electrolysis is a relatively convenient method for producing hydrogen. Direct current is passed into an electrolyzer filled with electrolyte, and water molecules are electrolyzed into hydrogen and oxygen on the electrodes. However, the existing water electrolysis hydrogen production technology still has the following problems: First, in the application of industrial water electrolysis, the water electrolysis hydrogen production equipment used often has defects such as difficult installation, difficult to move and disassemble, which increases the cost of water electrolysis hydrogen production in industry and is not conducive to practical electrolysis applications. Secondly, before water electrolysis hydrogen production, due to the presence of a large amount of impurity gas in the electrolysis chamber, after the current is full, the unqualified product gas is vented and replaced, which consumes electricity and reduces the electrolysis efficiency. Finally, as the water electrolysis hydrogen production reaction proceeds, the electrolyte in the electrolyzer will gradually decrease. At the same time, as the ambient temperature changes, the water electrolysis hydrogen production reaction cannot be in the most suitable temperature range for the reaction. The above situations all affect the process of water electrolysis hydrogen production reaction.

Summary of the invention

In order to overcome the above technical defects, the present invention provides a closed modular electrolyzer and method for producing hydrogen by electrolysis of water, which can solve the technical problems that the existing water electrolysis equipment is difficult to install, move and disassemble, resulting in great difficulty in application.

In order to achieve the above object, the present invention adopts the following technical contents:

A closed modular electrolytic cell for producing hydrogen by electrolysis of water, comprising a body of the electrolytic cell;

The water electrolysis hydrogen production tank body is composed of a plurality of electrolysis chamber modules connected in series, and the electrolysis chamber modules use a plurality of anode chambers and cathode chambers connected alternately;

The anode chamber and the cathode chamber are separated by an ion exchange membrane;

The anode chamber and the cathode chamber are respectively connected to the electrolytic sheet assembly;

The anode chamber and the cathode chamber are respectively provided with a liquid inlet hole and a gas collecting hole.

Furthermore, each connection between the anode chamber and the cathode chamber is provided with a pair of partitions, and vacuum air holes and ion holes for passing ions are opened on the partitions; the ion exchange membrane is arranged between the two partitions, and cooperates with the ion holes to realize ion exchange; an integrated ball valve device is arranged on the partition, which is used to open and close the vacuum air holes to realize the connection and isolation between the electrolysis chamber modules; the electrolysis chamber module is connected to a vacuum pumping device.

Furthermore, the integrated ball valve device includes a plurality of ball valve assemblies connected in sequence; the ball valve assembly includes a transmission wheel and a ball valve; the bottom of the transmission wheel is fixedly connected to the ball valve, and every two transmission wheels are movably connected via a transmission rod; a transmission handle is connected to the transmission wheel.

Furthermore, the electrolysis chamber module is connected to a temperature control system; the temperature control system includes a temperature sensor and an electric heating tube inserted in the electrolysis chamber module.

Furthermore, the electrolysis chamber module is connected to an automatic liquid supply system and a gas collection system.

Furthermore, the automatic liquid supply system includes a capacitive liquid level meter inserted inside the electrolysis chamber module and a liquid supply valve connected to the liquid inlet hole.

Furthermore, the gas collection system includes an anode chamber gas collection pipeline and a cathode chamber gas collection pipeline, and each of the anode chamber gas collection pipeline and the cathode chamber gas collection pipeline is connected to the corresponding gas collection hole.

Furthermore, the ends of the anode chamber gas collecting pipeline and the cathode chamber gas collecting pipeline are both connected to a dewatering assembly; the dewatering assembly includes a hollow rotary joint and an asbestos net arranged inside the hollow rotary joint; the inlet of the hollow rotary joint is connected to the anode chamber gas collecting pipeline or the cathode chamber gas collecting pipeline, and the outlet is connected to a three-way valve; the three-way valve is connected to the gas buffer tank.

A method for operating a closed modular electrolyzer for producing hydrogen by electrolysis of water, based on the above-mentioned closed modular electrolyzer for producing hydrogen by electrolysis of water, comprising:

Multiple anode chambers and cathode chambers are alternately connected to assemble multiple electrolytic chamber modules; the electrolytic sheet assembly is respectively connected to each anode chamber and cathode chamber; water is supplied to the anode chamber and cathode chamber via the liquid inlet hole; the water is electrolyzed using the electrolytic sheet assembly; and the product gas is collected using the gas collecting hole.

Furthermore, before electrolyzing water, an integrated ball valve device is used to connect the electrolysis chamber modules, and a vacuum device is used to evacuate the electrolysis chamber modules.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention provides a closed modular electrolyzer for producing hydrogen by electrolysis of water, the electrolyzer comprises a body of a hydrogen production cell for electrolysis of water composed of a plurality of electrolysis chamber modules connected in series, the electrolysis chamber modules adopt a plurality of anode chambers and cathode chambers connected alternately; the anode chamber and the cathode chamber are separated by an ion exchange membrane, and both are connected to an electrolysis sheet assembly for electrolysis of water, the anode chamber and the cathode chamber are provided with a liquid inlet and a gas collecting hole, and each electrolysis chamber is set as a prefabricated separate partition through a modular design, so that the electrolyzer can cope with a relatively complex actual industrial production environment. Compared with the traditional integrated electrolyzer, the setting of the cell body is more flexible, and can be freely combined and matched according to actual production needs; the structure and principle of the electrolyzer are simple, not only is it easy to disassemble and move, and it is highly practical, but it can also save production costs and improve the purity of the product gas, and has good promotion and application value.

Preferably, in the present invention, in order to solve the problem that a large amount of impurity gas still exists in the electrolysis chamber before hydrogen production by electrolysis of water, a vacuum pumping device is connected to the electrolysis chamber module, and ion exchange is realized by the cooperation of a partition and an ion exchange membrane, and an integrated ball valve device is arranged on the partition, so that all ball valves can be opened at one time, simplifying the operation of connecting various electrolysis chambers, and then before the electrolysis reaction of water starts, the impurity gas in the closed electrolysis chamber is discharged by the vacuum pumping device; the safety of the production process of hydrogen production by electrolysis of water is ensured, and the purity of the prepared hydrogen product is improved.

Preferably, in the present invention, in order to solve the problem that the electrolyte in the electrolytic cell will gradually decrease and the hydrogen production reaction by electrolysis of water cannot be in the most suitable temperature range for the reaction as the ambient temperature changes, the electrolytic chamber module is connected to a temperature control system and an automatic liquid supply system; the temperature control system can monitor the temperature of the electrolytic chamber and adjust the temperature in the electrolytic chamber module in real time according to the preset suitable temperature, thereby ensuring the electrolysis efficiency; the automatic liquid supply system can control the electrolyte level of the electrolytic cell and automatically control the flow rate of the supplied water, thereby being able to more accurately control the reaction process and improve the monitorability of the reaction process.

Preferably, in the present invention, the electrolysis chamber module is also connected to a gas collection system consisting of an anode chamber gas collection pipeline and a cathode chamber gas collection pipeline, which is used to collect the product gas after electrolysis; in addition, in order to improve the purity of the gas, a dehydration component is connected to the ends of the anode chamber gas collection pipeline and the cathode chamber gas collection pipeline, and the asbestos mesh inside the hollow rotary joint can absorb water vapor generated due to the high temperature during the reaction process; after the current is fully generated, the unqualified product gas is vented and replaced, and after analysis and qualification, gas collection can be carried out. At this time, the three-way valve automatically sends the product gas into the gas buffer tank to ensure the purity of the product gas collection.

The present invention also provides a working method of a closed modular electrolyzer for producing hydrogen by electrolysis of water. Based on the above-mentioned closed modular electrolyzer for producing hydrogen by electrolysis of water, the method can solve the problems that the existing water electrolysis hydrogen production equipment is often difficult to install, move and disassemble. The method can be freely combined according to actual production needs, convenient for disassembly and use, saving space and production costs, and easy for industrial production.

Preferably, in the present invention, before electrolyzing water, an integrated ball valve device is used to connect the electrolysis chamber modules, and a vacuum pumping device is used to evacuate the electrolysis chamber modules, which can effectively remove oxygen and other impurity gases in the electrolysis chamber, ensure the safety of the hydrogen production process by electrolyzing water, and improve the purity of the prepared hydrogen.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a closed modular electrolytic cell for producing hydrogen by electrolysis of water provided in an embodiment of the present invention;

Fig. 2 is a front view of Fig. 1;

FIG3 is a top view of FIG1 ;

FIG4 is a side view of FIG1 ;

FIG5 is a cross-sectional view of an ion exchange membrane of a closed modular electrolytic cell for producing hydrogen by electrolysis of water provided by an embodiment of the present invention;

FIG6 is a schematic diagram of an integrated ball valve device of a closed modular electrolytic cell for producing hydrogen by electrolysis of water provided by an embodiment of the present invention;

FIG7 is a structural exploded view of a modular electrolysis chamber of a closed modular electrolytic cell for producing hydrogen by electrolysis of water provided by an embodiment of the present invention;

FIG8 is a structural explosion diagram of a water removal component of a closed modular electrolytic cell for producing hydrogen by electrolysis of water provided in an embodiment of the present invention.

Reference numerals:

Electrolysis water hydrogen production tank body 1, electrolytic sheet assembly 2, automatic liquid feeding system 3, temperature control system 4, electrolytic chamber module 5, anode chamber 6, cathode chamber 7, anode sheet 8, cathode sheet 9, anode chamber gas collecting pipeline 10, cathode chamber gas collecting pipeline 11, water removal assembly 12, liquid inlet 13, gas collecting hole 14, ion exchange membrane 15, gas supply hole 16, pressure maintaining valve 17, three-way valve 18, integrated ball valve device 19, vacuum valve 20, gas collecting system 21;

Capacitive liquid level meter 301, liquid supply valve 302, temperature sensor 401, electric heating tube 402, partition 501, fixing bolt 502, hollow rotary joint 1201, asbestos net 1202, transmission handle 1901, transmission wheel 1902, transmission rod 1903, ball valve 1904, bolt 1905.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition and explanation in the subsequent drawings.

In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The present invention is further described in detail below in conjunction with the accompanying drawings:

Example

In conjunction with what is mentioned in the background technology, the existing electrolysis of water to produce hydrogen technology still has the following problems: First, in the application of industrial electrolysis of water, the electrolysis of water to produce hydrogen equipment used often has defects such as difficult installation, difficult to move and disassemble, which increases the cost of electrolysis of water to produce hydrogen in industry, which is not conducive to practical electrolysis applications. Secondly, before electrolysis of water to produce hydrogen, due to the presence of a large amount of impurity gases in the electrolysis chamber, after the current is full, the unqualified product gas is vented and replaced, which consumes electric energy and reduces the electrolysis efficiency. Finally, as the electrolysis of water to produce hydrogen reaction proceeds, the electrolyte in the electrolyzer will gradually decrease, and as the ambient temperature changes, the electrolysis of water to produce hydrogen reaction cannot be in the most suitable temperature range for reaction, and the above situations all affect the process of electrolysis of water to produce hydrogen reaction.

In order to solve the above problems, the present embodiment provides a closed modular electrolytic cell for hydrogen production by water electrolysis, which has the characteristics of modularization, easy industrial production, controlling the connectivity of the electrolytic chamber to realize integrated vacuum operation and automatically controlling the liquid level and reaction temperature of the hydrogen production reaction by water electrolysis. The electrolytic cell includes a closed modular electrolytic hydrogen production cell body, an automatic liquid supply system for controlling the electrolyte level, and a temperature control system for controlling the reaction temperature. An ion exchange membrane is provided in each of two adjacent electrolytic chamber modules to divide the water electrolysis hydrogen production cell into a cathode chamber and an anode chamber separated by a gap, and each chamber is fixed with a pair of partitions with uniform holes and bolts; each cathode chamber and anode chamber are connected to a gas collection pipeline above each cathode chamber and anode chamber, respectively, for collecting gas on both sides; each electrolytic chamber is provided with an inlet and outlet hole at the bottom thereof, which is connected to the automatic liquid supply system; in addition, each chamber is provided with an integrated ball valve device that can be assembled, which can connect each chamber before the reaction starts to facilitate the formation of a vacuum environment; in order to ensure the airtightness of the overall electrolytic cell, the clamping member for placing the positive and negative electrode sheets is sealed. Therefore, the present invention can freely assemble the electrolytic cell according to the working conditions, thereby improving the flexibility in industrial production. At the same time, the automatic liquid feeding system and the temperature control system can monitor the relevant parameters in the process of hydrogen production by electrolysis of water, so that the process of hydrogen production by electrolysis of water can proceed smoothly.

The specific structure of this embodiment is described in detail below in conjunction with the accompanying drawings:

As shown in FIG. 1 and FIG. 2 , this embodiment provides a closed modular electrolytic cell for producing hydrogen by electrolysis of water:

The invention comprises a water electrolysis hydrogen production tank body 1, an electrolytic sheet assembly 2 and an external control system, wherein the external control system comprises an automatic liquid supply system 3 and a temperature control system 4.

Specifically, the water electrolysis hydrogen production tank body 1 is modularly designed, and each electrolysis chamber module 5 includes an ion exchange membrane 15, which divides the entire water electrolysis hydrogen production tank body 1 into alternating cathode chambers 7 and anode chambers 6, and the cathode chambers 7 and the anode chambers 6 are respectively connected to gas collecting holes 14 and liquid inlet holes 13.

The gas collecting pipes connected to the gas collecting holes 14 are divided into the cathode chamber gas collecting pipe 11 and the anode chamber gas collecting pipe 10, and the two pipes collect gas separately; the liquid inlet hole 14 is connected to the automatic liquid supply system 3 composed of the liquid level monitoring system and the automatic liquid supply valve equipped in each chamber. An integrated ball valve device 19 that can be assembled is provided between a pair of partitions 501 with uniform holes, the ion exchange membrane 15, and the fixing bolts 502, which plays the role of connecting the electrolytic chambers.

As shown in Figures 1 to 4, the body 1 of the water electrolysis hydrogen production cell is a fully enclosed modular design. As shown in Figure 5, each two adjacent separate electrolytic chamber modules 5 are connected by two partitions 501 and the ion exchange membrane 15 clamped therein through five fixing bolts 502 on the left and right sides. At the same time, rubber seals are used to ensure the airtightness of the entire device.

As shown in Figures 2 and 7, in this embodiment, the electrolytic sheet assembly 2 includes a plurality of cathode sheets 9 and a plurality of anode sheets 8, and each electrolytic chamber module 5 includes an electrolytic sheet assembly 2, wherein the upper ends of the cathode sheets 9 and the anode sheets 8 are clamped and installed at the lower end of the top movable seal through a clamping structure. When the movable seal is sealed on the upper end of the electrolytic water hydrogen production tank body 1, the cathode sheet 9 is vertically inserted into the cathode electrolytic chamber 7, and the anode sheet 8 is vertically inserted into the anode electrolytic chamber 6.

In this embodiment, the external control system includes an automatic water supply system 3 and a temperature control system 4 .

The automatic liquid supply system 3 is provided with an electrolyte level monitoring device for each electrolytic chamber module 5, which is connected to the liquid supply valve circuit to form a liquid supply system with automatic control function.

The electrolyte level monitoring component includes a capacitive level meter 301. The capacitive level meter 301 has the characteristics of simple structure, high resolution, and non-contact measurement, and can monitor the liquid level of the electrolytic cell in an alkaline environment.

The automatic liquid supply system 3 also includes a liquid supply valve 302, which is an electric valve water valve. When the liquid level in each electrolysis chamber drops to the critical line as the reaction proceeds, the capacitive liquid level meter 301 obtains the sensor signal and inputs it to the water supply valve 302. The water supply valve controls the water level to rise to the reaction liquid level and then stops, thereby realizing automatic control of the liquid level in the electrolytic cell for electrolyzing water to produce hydrogen.

In this embodiment, the suitable electrolysis temperature of the electrolytic cell for producing hydrogen by electrolysis of water is 60° C. to 80° C., which is automatically adjusted by the temperature control system 4 , wherein the temperature control system 4 is divided into a temperature monitoring component and a heating component.

As shown in FIG. 2 , the temperature detection component is a temperature sensor 401, which converts the temperature of the electrolyte in the electrolytic cell into a resistance value, and after amplification and comparison by an integrated amplifier, outputs the temperature signal of the electrolyte as a control signal to be transmitted to the heating component.

The heating component is an electric heating tube 402. The average heating power of the electric heating tube 402 is effectively controlled by the temperature sensor 401, so that the electrolyte in the electrolytic cell is kept at a constant temperature, and finally the temperature is displayed through high-precision temperature control.

In this embodiment, as shown in FIG. 1 , FIG. 2 and FIG. 3 , an air supply hole 16 and a pressure-maintaining valve 17 are provided on the side of each electrolysis chamber module 5 so as to regulate the atmosphere in the electrolysis chamber before the hydrogen production reaction by electrolysis of water.

As shown in Figures 5, 6 and 7, an integrated ball valve device 19 that can be assembled is provided between a pair of partitions 501 with uniform holes, the ion exchange membrane 15, and the fixing bolts 502, which serves to connect the electrolysis chambers and solves the problem that a large amount of impurity gas still exists in the electrolysis chamber before hydrogen production by electrolysis of water. The electrolysis chamber module 5 is connected to a vacuum pump through a vacuum valve 20, and ion exchange is achieved by the cooperation of the partition 501 and the ion exchange membrane 15. In addition, an integrated ball valve device 19 is provided on the partition 501, which can open all the ball valves at one time, simplifying the operation of connecting the various electrolysis chambers, and then before the electrolysis reaction of water starts, the impurity gas in the closed electrolysis chamber is discharged through the vacuum pump; the safety of the hydrogen production process by electrolysis of water is ensured, and the purity of the prepared hydrogen product is improved.

Specifically, as shown in Figure 6, the integrated ball valve device 19 consists of a transmission handle 1901, a transmission wheel 1902, a transmission rod 1903, a ball valve 1904 and a bolt 1905; the bottom of the transmission wheel 1902 is fixedly connected to the ball valve 1904, and every two transmission wheels 1902 are movably connected through a transmission rod 1903; the transmission handle 1901 is connected to the transmission wheel 1902, which can realize opening all the ball valves 1904 at one time, simplifying the operation of connecting various electrolysis chambers; thereby realizing the discharge of impurity gases in the closed electrolysis chamber through a vacuum device before the start of the water electrolysis reaction.

In this embodiment, as shown in FIG4 , the gas collection system 21 is divided into a cathode chamber gas collection pipeline 11 and an anode chamber gas collection pipeline 10; each pipeline collects hydrogen and oxygen generated by each electrolytic chamber during the reaction. A detachable dehydration assembly 12 is provided at the end of the cathode chamber gas collection pipeline 11 and the anode chamber gas collection pipeline 10 for dehydrating the product gas; wherein, as shown in FIG8 , the detachable dehydration assembly 12 is connected to the main gas collection pipeline (the pipeline where each anode chamber gas collection pipeline 10 is collected together and the pipeline where each cathode chamber gas collection pipeline 11 is collected together) through a hollow rotary joint 1201. Specifically, a cotton-like structure quicklime supported by an asbestos net 1202 is placed inside the dehydration assembly 12 to absorb water vapor generated during the reaction due to high temperature. Further, a three-way valve 18 is provided at the rear end of the dehydration assembly 12. After the current is full, the unqualified product gas is vented and replaced. After being analyzed as qualified, gas collection can be performed. At this time, the three-way valve 18 automatically sends the product gas into the gas buffer tank.

As shown in FIG. 2 , the automatic liquid feeding system 3 and the temperature control system 4 provided in this embodiment are only schematic diagrams, and each electrolysis chamber is equipped with an automatic liquid feeding system 3 and a temperature control system 4 .

This embodiment also provides a method for operating a closed modular electrolytic cell for producing hydrogen by electrolysis of water, and the specific steps are as follows:

When installing this embodiment, the modular electrolyzer should be assembled, the cathode and anode used in the reaction should be installed on the electrolytic sheet assembly 2, and the electrolyzer for hydrogen production by electrolysis of water should be tested for tightness. 0.4MPa nitrogen should be used to test the system for sealing.

During monitoring, use soapy water to test component joints and equipment connections to ensure good sealing.

When this embodiment is used, the integrated ball valve device 19 is first used to connect each chamber, so as to facilitate the vacuum treatment of the electrolysis chamber and remove the oxygen and other impurity gases in the electrolysis chamber. During the vacuum treatment process, the liquid supply valve 302 is closed, the vacuum valve 20 connected to the electrolysis chamber module is opened, and the pressure-maintaining valve 17 is used for vacuum treatment. During the reaction, the automatic liquid supply system 3 and the temperature control system 4 are turned on, and the liquid level and temperature changes during the reaction are monitored in real time and regulated to ensure the smooth progress of the electrolysis of water to produce hydrogen. After the current is full, the product gas is dehydrated by the dehydration component 12, and the unqualified product gas is vented and replaced. After qualified analysis, gas collection can be carried out. At this time, the three-way valve 18 automatically sends the product gas into the gas buffer tank.

This embodiment provides a closed modular electrolyzer for producing hydrogen by electrolysis of water, which has at least the following beneficial effects:

First, the electrolytic cell adopts a modular design, and each electrolytic chamber is a prefabricated separate partition, which is combined and fixed by bolts. It can cope with relatively complex actual industrial production environments. Compared with traditional integrated electrolytic cells, the setting of the cell body is more flexible and saves production costs.

Second, the electrolyzer adopts a closed electrolyzer design. Before starting the electrolysis of water to produce hydrogen operation, an integrated ball valve device is used to connect the chambers in the tank to facilitate vacuuming of the electrolysis chamber to remove oxygen and other impurity gases in the electrolysis chamber, thereby ensuring the safety of the electrolysis of water to produce hydrogen production process and improving the purity of the prepared hydrogen. At the same time, due to its closed design, the electrolysis cell can be sealed to prevent external gases from entering the water electrolysis system.

Third, in the electrolysis process of hydrogen production by electrolysis of water, an automatic liquid supply system and a temperature control system are used to control the liquid level and temperature of the electrolysis. The automatic liquid supply system controls the electrolyte level of the electrolytic cell, and the temperature control system controls the reaction temperature of the hydrogen production process by electrolysis of water to be within a suitable temperature range. This enables more precise control of the reaction process and improves the monitorability of the reaction process.

In summary, the present invention provides a closed modular electrolytic cell and method for producing hydrogen by electrolyzing water, which has the following advantages over existing water electrolysis equipment:

The electrolyzer includes a water electrolysis hydrogen production tank body composed of a plurality of electrolysis chamber modules connected in series. The electrolysis chamber modules use a plurality of anode chambers and cathode chambers connected alternately. The anode chamber and the cathode chamber are separated by an ion exchange membrane, and are both connected to an electrolysis sheet assembly for electrolyzing water. The anode chamber and the cathode chamber are both provided with a liquid inlet and a gas collecting hole. Through a modular design, each electrolysis chamber is set as a prefabricated separate partition, so that the electrolyzer can cope with a relatively complex actual industrial production environment. Compared with the traditional integrated electrolyzer, the setting of the tank body is more flexible and can be freely combined and matched according to actual production needs. The structure and principle of the electrolyzer are simple, not only is it easy to disassemble and move, and it is highly practical, but it can also save production costs and improve the purity of the product gas, and has good promotion and application value.

The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims (10)

1. The closed modularized electrolytic tank for producing hydrogen by electrolyzing water is characterized by comprising an electrolytic water hydrogen production tank body (1);

the electrolytic water hydrogen production tank body (1) is formed by connecting a plurality of electrolytic chamber modules (5) in series, and the electrolytic chamber modules (5) adopt a plurality of anode chambers (6) and cathode chambers (7) which are alternately connected;

the anode chamber (6) and the cathode chamber (7) are separated by an ion exchange membrane (15);

the anode chamber (6) and the cathode chamber (7) are respectively connected with the electrolyte sheet assembly (2);

the anode chamber (6) and the cathode chamber (7) are respectively provided with a liquid inlet hole (13) and a gas collecting hole (14).

2. The electrolytic cell for closed modular water electrolysis hydrogen production according to claim 1, wherein a pair of partition plates (501) are arranged at each connection position of the anode chamber (6) and the cathode chamber (7), and the partition plates (501) are provided with true air holes and ion holes for passing ions; the ion exchange membrane (15) is arranged between the two separation plates (501) and is matched with the ion holes to realize ion exchange; an integrated ball valve device (19) is arranged on the partition plate (501) and used for opening and closing the vacuum air holes so as to realize communication and isolation between the electrolytic chamber modules (5); the electrolytic chamber module (5) is connected with a vacuumizing device.

3. A closed modular electrolyzer for the production of hydrogen from electrolyzed water according to claim 2, characterized in that said integral ball valve means (19) comprise a plurality of ball valve assemblies connected in sequence; the ball valve assembly includes a drive sheave (1902) and a ball valve (1904); the bottom of the transmission wheel disc (1902) is fixedly connected with the ball valve (1904), and every two transmission wheel discs (1902) are movably connected through a transmission rod (1903); the transmission wheel disc (1902) is connected with a transmission handle (1901).

4. The closed modularized electrolytic tank for producing hydrogen by electrolyzing water according to claim 1, wherein a temperature control system (4) is connected to the electrolytic chamber module (5); the temperature control system (4) comprises a temperature sensor (401) and an electric heating tube (402) which are inserted into the electrolysis chamber module (5).

5. The closed modular electrolytic cell for producing hydrogen by electrolyzing water according to claim 1, wherein the electrolytic chamber module (5) is communicated with an automatic liquid supply system (3) and a gas collecting system (21).

6. The closed modular electrolytic cell for hydrogen production by water electrolysis according to claim 5, wherein the automatic liquid feeding system (3) comprises a capacitance type liquid level meter (301) inserted in the electrolytic chamber module (5) and a liquid feeding valve (302) communicated with the liquid inlet hole (13).

7. The closed modular electrolytic cell for producing hydrogen by electrolyzing water according to claim 5, wherein the gas collecting system (21) comprises an anode chamber gas collecting pipe (10) and a cathode chamber gas collecting pipe (11), and each of the anode chamber gas collecting pipe (10) and the cathode chamber gas collecting pipe (11) is communicated with a corresponding gas collecting hole (14).

8. The electrolytic tank for closed modular water electrolysis hydrogen production according to claim 7 is characterized in that the ends of the anode chamber gas collecting pipeline (10) and the cathode chamber gas collecting pipeline (11) are connected with a water removing component (12); the water removal assembly (12) comprises a hollow rotary joint (1201) and an asbestos screen (1202) arranged inside the hollow rotary joint (1201); the inlet of the hollow rotary joint (1201) is communicated with the anode chamber gas collecting pipeline (10) or the cathode chamber gas collecting pipeline (11), and the outlet is connected with a three-way valve (18); the three-way valve (18) is connected with the gas buffer tank.

9. A method of operating a closed modular water electrolysis cell for hydrogen production, based on any one of claims 1-8, comprising:

a plurality of anode chambers (6) and cathode chambers (7) are alternately connected and assembled into a plurality of electrolysis chamber modules (5); connecting the electrolyte sheet assembly (2) with each anode chamber (6) and cathode chamber (7) respectively; water is supplied to the anode chamber (6) and the cathode chamber (7) by the liquid inlet hole (13); electrolyzing water by using an electrolytic piece assembly (2); the product gas is collected by means of a gas collecting hole (14).

10. The working method of the closed modularized electrolytic tank for producing hydrogen by electrolyzing water according to claim 9, wherein before the water is electrolyzed, the electrolytic chamber modules (5) are communicated by adopting an integrated ball valve device (19), and the vacuum pumping device is utilized to vacuumize the electrolytic chamber modules (5).