Hydrogen production device

Abstract

The hydrogen production device is characterized in that an electrolysis cavity is formed in an electrolytic tank, and the electrolytic tank is provided with an inlet channel, a first outlet channel and a second outlet channel which communicate with the electrolysis cavity; the first filter, the circulating pump, the second filter and the flow meter are sequentially communicated through a circulating pipeline, fluid flowing through a circulating inner cavity channel of the circulating pipeline can sequentially pass through the first filter, the circulating pump, the second filter and the flow meter, and a first pipe opening and a second pipe opening in the two ends of the circulating pipeline are both communicated with an inlet channel of the electrolytic bath; a flow control point is arranged on the circulation pipeline, the flow control point is used for connecting the flow controller to the circulation inner cavity channel of the circulation pipeline, and the flow controller is used for controlling the flow flowing through the circulation inner cavity channel of the circulation pipeline. The flow controller can be matched with the adaptive alkali liquor flow according to the actual input power, electrolysis of a small amount of alkali liquor is achieved, electric energy input in the starting stage of the electrolytic cell is not wasted, the utilization rate of the electric energy is increased, and cost is reduced.

Description

Technical Field

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

[0002] There are many methods for producing hydrogen, such as water gas method, water electrolysis method, biological hydrogen production method, high temperature decomposition method, partial oxidation method, ammonia electrolysis method and thermal decomposition method. In addition, hydrogen can also be produced from fossil fuels and biomass. These methods have their own advantages and disadvantages, depending on the scale, efficiency and cost of hydrogen production.

[0003] The alkaline electrolytic cell hydrogen production method is widely used. The principle of the alkaline electrolytic cell hydrogen production method is to introduce alkaline solution electrolyte into the electrolytic cell from the liquid inlet of the electrolytic cell, pass direct current into the electrolytic cell filled with alkaline solution, and electrochemical reaction occurs on the electrodes of the electrolytic cell to decompose into hydrogen and oxygen.

[0004] In the actual hydrogen production process, the alkaline electrolyzer hydrogen production method requires the electrolyzer to maintain a relatively high input power. If the input power of the electrolyzer is too low, normal hydrogen production cannot be carried out. The main reason for this situation is that the hydrogen content in the oxygen side of the electrolyzer is relatively high, posing a safety hazard.

[0005] However, it usually takes a long time for the electrolyzer to start up and operate normally. During this startup phase, the electrolyzer is not in a normal operating state and has not reached the input power that can normally produce hydrogen. Therefore, although this startup phase of the electrolyzer wastes electricity, it cannot produce hydrogen, making the startup phase of the electrolyzer an invalid energy consumption. In addition, based on the demand for hydrogen production, the electrolyzer is frequently started or shut down, which causes the electrolyzer to often be in an invalid energy consumption startup phase. In the long run, the energy consumption of the electrolyzer is large and the cost is high. Summary of the invention

[0006] Based on this, it is necessary to provide a hydrogen production device to address the technical problems of high cost and serious energy waste of the electrolyzer mentioned above.

[0007] The present application provides a hydrogen production device, which comprises:

[0008] An electrolytic cell, wherein an electrolytic cavity is arranged inside the electrolytic cell, and the electrolytic cell is provided with an inlet channel, a first outlet channel, and a second outlet channel communicating with the electrolytic cavity;

[0009] A fluid circulation system, the fluid circulation system comprises a circulation pipeline, a first filter, a circulation pump, a second filter, a flow meter and at least one flow controller, the first filter, the circulation pump, the second filter and the flow meter are sequentially connected through the circulation pipeline, the fluid flowing through the circulation inner cavity channel of the circulation pipeline can pass through the first filter, the circulation pump, the second filter and the flow meter in sequence, the first pipe opening and the second pipe opening at both ends of the circulation pipeline are connected to the inlet channel of the electrolytic cell; wherein at least one flow control point is arranged on the circulation pipeline, the flow control point is used for the flow controller to be connected to the circulation inner cavity channel of the circulation pipeline, and the flow controller is used to control the flow of the circulation inner cavity channel flowing through the circulation pipeline.

[0010] In one embodiment, the fluid circulation system further comprises:

[0011] A cooler is connected to the circulation inner cavity channel of the circulation pipeline, and the cooler is located between the circulation pump and the second filter.

[0012] In one embodiment, the fluid circulation system further comprises:

[0013] A first flow controller, a first flow control point is arranged on the circulation pipeline, the first flow control point is located between the circulation pump and the cooler, the first flow controller is arranged at the first flow control point and is connected to the circulation inner cavity channel of the circulation pipeline.

[0014] In one embodiment, the fluid circulation system further comprises:

[0015] A first transfer pipe, wherein a second flow control point is arranged on the first transfer pipe, one end of the first transfer pipe is connected between the first pipe and the first filter, and the other end of the first transfer pipe is connected between the circulation pump and the first flow controller;

[0016] A second flow controller is arranged at the second flow control point and is communicated with the inner cavity channel of the first transfer pipe.

[0017] In one embodiment, the hydrogen production device comprises:

[0018] a hydrogen separator, the hydrogen separator being in communication with the first outlet channel of the electrolyzer;

[0019] An oxygen separator is connected to the second outlet channel of the electrolytic cell.

[0020] In one embodiment, the fluid circulation system further comprises:

[0021] a second transfer pipe, wherein two end openings of the second transfer pipe are respectively connected to the hydrogen separator and the oxygen separator;

[0022] A third transfer pipe, one end of the third transfer pipe is connected to the second transfer pipe, and the other end of the third transfer pipe is connected to the first filter.

[0023] In one embodiment, the hydrogen production device comprises:

[0024] A first liquid level gauge, wherein the first liquid level gauge is arranged in the hydrogen separator; and / or,

[0025] a second liquid level gauge, the second liquid level gauge being arranged in the oxygen separator; and / or,

[0026] a first pressure gauge, the first pressure gauge being arranged in the oxygen separator; and / or,

[0027] A first temperature gauge, wherein the first temperature gauge is arranged at the outlet of the hydrogen separator; and / or,

[0028] A second temperature gauge is provided at an outlet of the oxygen separator.

[0029] In one embodiment, the hydrogen production device comprises:

[0030] a second pressure gauge, the second pressure gauge being arranged at a cooling water inlet of the cooler;

[0031] a third temperature gauge, the third temperature gauge being arranged at a cooling water inlet of the cooler;

[0032] A fourth temperature gauge is arranged at a cooling water outlet of the cooler.

[0033] In one of the embodiments, the cooling water inlet of the cooler has an inlet main path and an inlet bypass, the inlet main path is provided with a manual regulating valve, and the inlet bypass is provided with a pneumatic regulating valve.

[0034] In one embodiment, the hydrogen production device comprises:

[0035] A fifth temperature meter is provided between the second filter and the flow meter, and the fifth temperature meter is electrically connected to the pneumatic regulating valve.

[0036] In the above-mentioned hydrogen production device, the process of passing direct current into the electrolysis cavity of the electrolyzer is the process of starting the electrolyzer. It usually takes a long time for the electrolyzer to start and operate normally. During the startup stage of the electrolyzer, the direct current passed into the electrolysis cavity of the electrolyzer needs to slowly increase the input power. Therefore, when the input power does not reach the preset level, the electrolyzer is not in a normal operating state and does not reach the input power that can normally implement hydrogen production. Therefore, the purpose of setting one or more flow controllers in the circulation pipeline in the above-mentioned fluid circulation system is to match the appropriate alkali solution flow rate according to the actual input power. When the input power of the direct current is at a low level (does not reach the preset level), less alkali solution can be passed into the electrolysis cavity of the electrolyzer. Therefore, the lower level of input power can match less alkali solution, realize the electrolysis of less alkali solution, and achieve the purpose of hydrogen production, rather than wasting the electric energy input in this startup stage of the electrolyzer, improve the utilization rate of electric energy, reduce the consumption of invalid electric energy, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is a schematic diagram of the structure of a hydrogen production device provided in one embodiment of the present application.

[0038] Figure Number:

[0039] 1000, electrolyzer; 2000, fluid circulation system; 3000, hydrogen separator; 4000, oxygen separator;

[0040] 1000a, inlet channel; 1000b, first outlet channel; 1000c, second outlet channel;

[0041] 2000a, circulation pipeline; 2000b, first transfer pipeline; 2000c, second transfer pipeline; 2000d, third transfer pipeline;

[0042] 2100, first filter; 2200, circulation pump; 2300, second filter; 2400, flow meter; 2500, cooler; 2600, first flow controller; 2700, second flow controller;

[0043] 2001, first liquid level gauge; 2002, second liquid level gauge; 2003, first pressure gauge; 2004, first temperature gauge; 2005, second temperature gauge; 2006, second pressure gauge; 2007, third temperature gauge; 2008, fourth temperature gauge; 2009, fifth temperature gauge; 2010, manual regulating valve; 2011, pneumatic regulating valve. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0045] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application 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 application.

[0046] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0048] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0050] Referring to FIG. 1 , the present application provides a hydrogen production device, which includes an electrolyzer 1000 and a fluid circulation system 2000. The electrolyzer 1000 is generally composed of a cell body, an anode and a cathode, and most of them use a diaphragm to separate the anode chamber and the cathode chamber. According to the different electrolytes, it is divided into three categories: an aqueous solution electrolyzer 1000, a molten salt electrolyzer 1000 and a non-aqueous solution electrolyzer 1000. When direct current passes through the electrolyzer 1000, an oxidation reaction occurs at the interface between the anode and the solution, and a reduction reaction occurs at the interface between the cathode and the solution to produce the desired product. Among them, the function of the electrolyzer 1000 provided in the present application is to electrolyze the alkali solution by direct current, and an electrochemical reaction occurs on the electrodes of the electrolyzer 1000 to decompose the alkali solution into hydrogen and oxygen, thereby realizing the production of hydrogen. Therefore, the electrolytic cell 1000 provided in the present application is provided with an electrolytic cavity, and the electrolytic cell 1000 is provided with an inlet channel 1000a, a first outlet channel 1000b and a second outlet channel 1000c connected to the electrolytic cavity, wherein the inlet channel 1000a is used to pass an alkali solution into the electrolytic cavity, and when direct current passes through the electrolytic cavity of the electrolytic cell 1000, an oxidation reaction occurs at the interface between the anode and the solution, and a reduction reaction occurs at the interface between the cathode and the solution, so as to produce oxygen and hydrogen. Oxygen and hydrogen flow out through the first outlet channel 1000b and the second outlet channel 1000c.

[0051] In the process of introducing alkali solution into the electrolytic cavity of the electrolytic cell 1000, the circulation introduction of the liquid can be realized by the above-mentioned fluid circulation system 2000. As shown in FIG1, the fluid circulation system 2000 may include a circulation pipeline 2000a, a first filter 2100, a circulation pump 2200, a second filter 2300, a flow meter 2400 and at least one flow controller. Among them, the circulation pipeline 2000a can be formed by connecting a plurality of fluid delivery pipes, so as to form a circulation inner cavity channel for connecting a plurality of devices such as the first filter 2100, the circulation pump 2200, the second filter 2300, the flow meter 2400 and the flow controller. Among them, the overall circulation pipeline 2000a formed by connecting a plurality of fluid delivery pipes may have a first pipe opening and a second pipe opening located at the two ends of the circulation pipeline 2000a. The first filter 2100 may adopt a Y-type alkali solution filter, and the second filter 2300 may adopt a blue-type alkali solution filter.

[0052] For example, as shown in FIG1 , the first filter 2100, the circulation pump 2200, the second filter 2300 and the flow meter 2400 can be sequentially connected through the circulation pipeline 2000a. At this time, the fluid such as alkali solution can flow in the circulation inner cavity channel of the circulation pipeline 2000a, so that the fluid flowing through the circulation inner cavity channel of the circulation pipeline 2000a can sequentially pass through the first filter 2100, the circulation pump 2200, the second filter 2300 and the flow meter 2400. After the first filter 2100, the circulation pump 2200, the second filter 2300 and the flow meter 2400 are connected, the first pipe opening and the second pipe opening at both ends of the circulation pipeline 2000a are connected to the inlet channel 1000a of the electrolytic cell 1000, and then form a circulation connection with the electrolytic cell 1000. Among them, at least one flow control point can be set on the circulation pipeline 2000a, and the function of the flow control point is to connect one or more flow controllers to the circulation inner cavity channel of the circulation pipeline 2000a, wherein each flow control point can be used to install a corresponding flow controller, and each flow controller can be used to control the flow of the circulation inner cavity channel flowing through the circulation pipeline 2000a.

[0053] Based on the above structural design, when it is necessary to use the electrolytic cell 1000 to electrolyze and produce hydrogen, an alkali solution can be introduced into the electrolysis cavity of the electrolytic cell 1000 through the inlet channel 1000a provided on the electrolytic cell 1000. Direct current is introduced into the electrolysis cavity of the electrolytic cell 1000. When the direct current passes through the electrolysis cavity of the electrolytic cell 1000, an oxidation reaction can occur at the interface between the anode and the solution, and a reduction reaction can occur at the interface between the cathode and the solution, so as to produce oxygen and hydrogen. Oxygen and hydrogen flow out through the first outlet channel 1000b and the second outlet channel 1000c.

[0054] The process of passing direct current into the electrolytic cavity of the electrolytic cell 1000 is the process of starting the electrolytic cell 1000. It usually takes a long time for the electrolytic cell 1000 to start up and operate normally. During the startup phase of the electrolytic cell 1000, the direct current passed into the electrolytic cavity of the electrolytic cell 1000 needs to increase the input power slowly. Therefore, when the input power does not reach the preset level, the electrolytic cell 1000 is not in a normal operating state and does not reach the input power that can normally produce hydrogen. Therefore, the purpose of setting one or more flow controllers in the circulation pipeline 2000a in the above-mentioned fluid circulation system 2000 is to match the appropriate alkali solution flow rate according to the actual input power. When the input power of the direct current is at a low level (not reaching the preset level), less alkali solution can be introduced into the electrolysis cavity of the electrolytic cell 1000. Therefore, the lower level of input power can match less alkali solution, realize the electrolysis of less alkali solution, and achieve the purpose of hydrogen production, instead of wasting the electric energy input during the startup stage of the electrolytic cell 1000, thereby improving the utilization rate of electric energy, reducing the consumption of invalid electric energy, and reducing costs.

[0055] Continuing to refer to FIG. 1 , the fluid circulation system 2000 further includes a cooler 2500, which is used to cool the alkali solution flowing in the circulation pipeline 2000a when it flows through the cooler 2500. The cooler 2500 can be arranged at a suitable position of the circulation pipeline 2000a as required, so that the cooler 2500 can cooperate with other devices. For example, in one embodiment, the cooler 2500 can be connected to the circulation inner cavity channel of the circulation pipeline 2000a, and the cooler 2500 is located between the circulation pump 2200 and the second filter 2300, and the cooling operation of the alkali solution is implemented between the circulation pump 2200 and the second filter 2300.

[0056] The number of flow controllers can be set as needed. For example, in one embodiment, the fluid circulation system 2000 may include a first flow controller 2600, that is, only one flow controller is set. At this time, a first flow control point is set on the circulation pipeline 2000a, and the first flow control point is located between the circulation pump 2200 and the cooler 2500. The first flow controller 2600 is set at the first flow control point and communicates with the circulation inner cavity channel of the circulation pipeline 2000a. At the same time, in one embodiment, the fluid circulation system 2000 can also be provided with a second flow controller 2700. At this time, the fluid circulation system 2000 may include a first transfer pipeline 2000b, and a second flow control point is set on the first transfer pipeline 2000b, which is used to connect the second flow controller 2700 in the first transfer pipeline 2000b. At this time, one end of the first transfer pipe 2000b is connected between the first pipe and the first filter 2100, and the other end of the first transfer pipe 2000b is connected between the circulation pump 2200 and the first flow controller 2600. The second flow controller 2700 is arranged at the second flow control point and is connected to the inner cavity channel of the first transfer pipe 2000b. The flow controller can be a ball variable flow regulating valve, etc., and the flow controller can also be electrically connected to the control cabinet.

[0057] After the alkali solution is electrolyzed to produce hydrogen and oxygen, the hydrogen and oxygen can flow out from the first outlet channel 1000b and the second outlet channel 1000c of the electrolyzer 1000, respectively. At this time, in one embodiment, the hydrogen production device may include a hydrogen separator 3000 and an oxygen separator 4000, and the hydrogen separator 3000 and the oxygen separator 4000 are used to receive the produced hydrogen and oxygen, respectively. Therefore, the hydrogen separator 3000 can be connected to the first outlet channel 1000b of the electrolyzer 1000 for receiving hydrogen, and the oxygen separator 4000 is connected to the second outlet channel 1000c of the electrolyzer 1000 for receiving oxygen. Referring to FIG. 1 , in one embodiment, the fluid circulation system 2000 may further include a second transfer pipe 2000c and a third transfer pipe 2000d, wherein the pipe openings at both ends of the second transfer pipe 2000c are respectively connected to the hydrogen separator 3000 and the oxygen separator 4000, one end of the third transfer pipe 2000d is connected to the second transfer pipe 2000c, and the other end of the third transfer pipe 2000d is connected to the first filter 2100.

[0058] As shown in the figure, in one embodiment, the hydrogen separator 3000 can be matched with a first liquid level gauge 2001 and a first thermometer 2004. The first liquid level gauge 2001 is arranged in the hydrogen separator 3000 to detect the liquid level of the hydrogen separator 3000. The first thermometer 2004 is arranged at the outlet of the hydrogen separator 3000 to detect the temperature of the outlet of the hydrogen separator 3000. The oxygen separator 4000 can be matched with a second liquid level gauge 2002, a first pressure gauge 2003, and a second thermometer 2005. The second liquid level gauge 2002 is arranged in the oxygen separator 4000 to detect the liquid level of the oxygen separator 4000. The first pressure gauge 2003 is arranged in the oxygen separator 4000 to detect the pressure of the oxygen separator 4000. The second thermometer 2005 is arranged at the outlet of the oxygen separator 4000 to detect the temperature of the outlet of the oxygen separator 4000.

[0059] In addition, the cooler 2500 may also be matched with a second pressure gauge 2006, a third temperature gauge 2007, and a fourth temperature gauge 2008. The second pressure gauge 2006 is arranged at the cooling water inlet of the cooler 2500, and is used to detect the temperature of the cooling water inlet of the cooler 2500. The third temperature gauge 2007 is arranged at the cooling water inlet of the cooler 2500, and is used to detect the temperature of the cooling water inlet of the cooler 2500. The fourth temperature gauge 2008 is arranged at the cooling water outlet of the cooler 2500, and is used to detect the temperature of the cooling water outlet of the cooler 2500. Moreover, in one embodiment, the cooling water inlet of the cooler 2500 has an inlet main path and an inlet bypass, the inlet main path is provided with a manual regulating valve 2010, and the inlet bypass is provided with a pneumatic regulating valve 2011. At this time, a fifth temperature gauge 2009 may also be provided. The fifth temperature gauge 2009 is provided between the second filter 2300 and the flow meter 2400 . The fifth temperature gauge 2009 is electrically connected to the pneumatic regulating valve 2011 .

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A hydrogen production device, characterized in that: The hydrogen production device comprises: An electrolytic cell, wherein an electrolytic cavity is arranged inside the electrolytic cell, and the electrolytic cell is provided with an inlet channel, a first outlet channel, and a second outlet channel communicating with the electrolytic cavity; A fluid circulation system, the fluid circulation system comprises a circulation pipeline, a first filter, a circulation pump, a second filter, a flow meter and at least one flow controller, the first filter, the circulation pump, the second filter and the flow meter are sequentially connected through the circulation pipeline, the fluid flowing through the circulation inner cavity channel of the circulation pipeline can pass through the first filter, the circulation pump, the second filter and the flow meter in sequence, the first pipe opening and the second pipe opening at both ends of the circulation pipeline are connected to the inlet channel of the electrolytic cell; wherein at least one flow control point is arranged on the circulation pipeline, the flow control point is used for the flow controller to be connected to the circulation inner cavity channel of the circulation pipeline, and the flow controller is used to control the flow of the circulation inner cavity channel flowing through the circulation pipeline.

2. The hydrogen production device according to claim 1, characterized in that: The fluid circulation system further comprises: A cooler is connected to the circulation inner cavity channel of the circulation pipeline, and the cooler is located between the circulation pump and the second filter.

3. The hydrogen production device according to claim 2, characterized in that: The fluid circulation system further comprises: A first flow controller, a first flow control point is arranged on the circulation pipeline, the first flow control point is located between the circulation pump and the cooler, the first flow controller is arranged at the first flow control point and is connected to the circulation inner cavity channel of the circulation pipeline.

4. The hydrogen production device according to claim 3, characterized in that: The fluid circulation system further comprises: A first transfer pipe, wherein a second flow control point is arranged on the first transfer pipe, one end of the first transfer pipe is connected between the first pipe and the first filter, and the other end of the first transfer pipe is connected between the circulation pump and the first flow controller; A second flow controller is arranged at the second flow control point and is communicated with the inner cavity channel of the first transfer pipe.

5. The hydrogen production device according to claim 1, characterized in that: The hydrogen production device comprises: a hydrogen separator, the hydrogen separator being in communication with the first outlet channel of the electrolyzer; An oxygen separator is connected to the second outlet channel of the electrolytic cell.

6. The hydrogen production device according to claim 5, characterized in that: The fluid circulation system further comprises: a second transfer pipe, wherein two end openings of the second transfer pipe are respectively connected to the hydrogen separator and the oxygen separator; A third transfer pipe, one end of the third transfer pipe is connected to the second transfer pipe, and the other end of the third transfer pipe is connected to the first filter.

7. The hydrogen production device according to claim 5, characterized in that: The hydrogen production device comprises: A first liquid level gauge, wherein the first liquid level gauge is arranged in the hydrogen separator; and / or, a second liquid level gauge, the second liquid level gauge being arranged in the oxygen separator; and / or, a first pressure gauge, the first pressure gauge being arranged in the oxygen separator; and / or, A first temperature gauge, wherein the first temperature gauge is arranged at the outlet of the hydrogen separator; and / or, A second temperature gauge is provided at an outlet of the oxygen separator.

8. The hydrogen production device according to claim 2, characterized in that: The hydrogen production device comprises: a second pressure gauge, the second pressure gauge being arranged at a cooling water inlet of the cooler; a third temperature gauge, the third temperature gauge being arranged at a cooling water inlet of the cooler; A fourth temperature gauge is arranged at a cooling water outlet of the cooler.

9. The hydrogen production device according to claim 8, characterized in that: The cooling water inlet of the cooler comprises an inlet main path and an inlet bypass. The inlet main path is provided with a manual regulating valve, and the inlet bypass is provided with a pneumatic regulating valve.

10. The hydrogen production device according to claim 9, characterized in that: The hydrogen production device comprises: A fifth temperature meter is provided between the second filter and the flow meter, and the fifth temperature meter is electrically connected to the pneumatic regulating valve.

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