Liquid metal coolant hydrogen production device with an oxygen pump device

Abstract

The present invention relates to the field of hydrogen production, and specifically provides a hydrogen production device with a liquid metal coolant and an oxygen pump device, aiming to solve the problem of low hydrogen production efficiency of existing hydrogen production devices with liquid metal coolants. For this purpose, the hydrogen production device with a liquid metal coolant and an oxygen pump device of the present invention, the hydrogen production device with a liquid metal coolant includes a reaction pool, in which a liquid metal coolant is contained, and a heat source, a water injection device and an oxygen pump device are further arranged in the reaction pool. The oxygen pump device includes: a power supply, which is connected to a switch; an anode is connected to the positive electrode of the power supply; a cathode is connected to the negative electrode of the power supply; a rheostat is connected in series with the power supply, and the rheostat is used to change the voltage between the anode and the cathode in the closed state of the switch. The present invention can adjust the resistance value of the rheostat according to the magnitude of the oxygen ion concentration in the center of the reaction pool, change the voltage between the anode and the cathode in the closed state of the switch, promote the oxygen evolution rate, thereby promoting the forward progress of the hydrogen production reaction and improving the hydrogen production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production, and specifically provides a hydrogen production device with a liquid metal coolant and an oxygen pump device. Background Art

[0002] At present, most industrialized water electrolysis hydrogen production equipment uses alkaline water electrolysis cells. However, the liquid pipeline fittings of water electrolysis hydrogen production equipment are prone to corrosion and leakage problems. At present, there is no good method to solve the problem of electrochemical corrosion in water electrolysis hydrogen production devices. For this reason, Chinese Patent Application CN114057160A discloses a system and method for producing hydrogen in a liquid heavy metal coolant device. The liquid metal coolant refers to a cooling medium composed of low-melting-point alkali metals and low-melting-point alloys, and liquid lead-bismuth alloy can be selected. By injecting water into the liquid heavy metal coolant, the water quickly evaporates into water vapor after contacting the liquid heavy metal coolant, and the water vapor reacts with the liquid heavy metal coolant at high temperature and is decomposed into hydrogen and dissolved oxygen ions; although this method avoids the problem of pipeline corrosion, there are still problems and deficiencies in this method.

[0003] The water injection pipe of this application injects water from the side. Since the density of the liquid metal coolant is much greater than the density of water, the liquid metal coolant is prone to flow back into the water injection pipe. Since the water injection pipe extends from the side, if the liquid metal coolant flows along the water injection pipe outside the container, it will solidify when cooled, thus blocking the water injection pipe and causing the reaction to not proceed normally; in this application, the circulation of the liquid metal coolant is promoted by spraying water upward, but the liquid metal coolant cools down after contacting water. According to the principle of thermal expansion and contraction, the density of the cooled liquid metal increases. To promote its circulation, a part of the driving force of water will be offset, which is not conducive to the circulation of the liquid metal coolant; when the concentration of oxygen ions increases, the reaction will be inhibited. Although an electrode oxygen pump device is used to form oxygen at the anode of the oxygen pump device and then extract the oxygen, the hydrogen production efficiency of this method still needs to be improved.

[0004] Correspondingly, there is a need in the art for a new liquid metal coolant hydrogen production device to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the above technical problems, that is, to solve the problem of low hydrogen production efficiency of the existing liquid metal coolant hydrogen production device. For this purpose, the present invention provides a liquid metal coolant hydrogen production device with an oxygen pump device. The liquid metal coolant hydrogen production device includes a reaction pool, in which a liquid metal coolant is contained. A heat source, a water injection device and an oxygen pump device are also arranged in the reaction pool. The heat source is used to maintain the liquid metal coolant at a certain temperature, the water injection device is used to inject water into the liquid metal coolant, and the oxygen pump device is used to promote the reaction between the liquid metal coolant and water, wherein the oxygen pump device includes:

[0006] A power source, which is connected to a switch. The switch is used to control the on / off of the power source;

[0007] An anode, which is arranged in the reaction tank and connected to the positive pole of the power source;

[0008] A cathode, which is arranged in the reaction tank and connected to the negative pole of the power source;

[0009] A rheostat, which is connected in series with the power source. The rheostat is used to change the voltage between the anode and the cathode when the switch is closed.

[0010] In the specific embodiment of the hydrogen production device with a liquid metal coolant having an oxygen pump device, the oxygen pump device further includes:

[0011] A voltage measuring device, which is used to measure the voltage between the cathode and the anode when the switch is off.

[0012] In the specific embodiment of the hydrogen production device with a liquid metal coolant having an oxygen pump device, the oxygen pump device further includes:

[0013] A tubular ceramic membrane. The anode is arranged inside the tubular ceramic membrane. After oxygen ions pass through the tubular ceramic membrane, oxygen is formed at the anode.

[0014] In the specific embodiment of the hydrogen production device with a liquid metal coolant having an oxygen pump device, there are several oxygen pump devices, all arranged around the water injection device.

[0015] In the specific embodiment of the hydrogen production device with a liquid metal coolant having an oxygen pump device, the water injection device includes:

[0016] A water injection pipe, which extends vertically into the reaction tank;

[0017] A water injection nozzle, which is arranged below the water injection pipe and communicated with the water injection pipe. The upper surface of the water injection nozzle is located below the liquid level of the liquid metal coolant, and the water injection nozzle sprays water upward.

[0018] In the specific embodiment of the hydrogen production device with a liquid metal coolant having an oxygen pump device, the oxygen pump devices are all arranged around the water injection pipe and located above the water injection nozzle.

[0019] In the specific embodiment of the hydrogen production device with a liquid metal coolant having an oxygen pump device, the hydrogen production device with a liquid metal coolant further includes:

[0020] A circulation device, which is used to drive the liquid metal coolant in the reaction tank to circulate.

[0021] In the specific embodiment of the hydrogen production device with a liquid metal coolant having an oxygen pump device, the hydrogen production device with a liquid metal coolant further includes:

[0022] A condenser, which is arranged outside the reaction tank and communicated with the top of the reaction tank, and hydrogen and vaporized water at the top of the reaction tank enter the condenser.

[0023] In the specific embodiment of the hydrogen production device with a liquid metal coolant having an oxygen pump device, the condenser is communicated with the water injection pipe, and the connection point of the condenser with the reaction tank is higher than the connection point of the condenser with the water injection pipe.

[0024] In the specific embodiment of the hydrogen production device with a liquid metal coolant having an oxygen pump device, the hydrogen production device with a liquid metal coolant further includes:

[0025] A hydrogen collector, which is communicated with the condenser and used for collecting hydrogen.

[0026] In the case of adopting the above technical solution, the present invention can adjust the resistance value of the rheostat according to the size of the oxygen ion concentration in the center of the reaction tank, change the voltage between the anode and the cathode in the closed state of the switch, promote the oxygen evolution rate, thereby promoting the forward progress of the hydrogen production reaction, improving the hydrogen production efficiency, and having a simple structure, being convenient for manufacturing and operation. In the open state of the switch, the magnitude of the electromotive force can be measured by a voltage measuring device, and the relationship between the voltage signal and the oxygen ion concentration can be deduced, so as to realize the measurement of the oxygen concentration in the liquid metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred embodiments of the present invention will be described below with reference to the drawings, in which:

[0028] Figure 1 A top view of the reaction tank in the present invention;

[0029] Figure 2 is the present invention Figure 1 A cross-sectional view, which shows the oxygen pump device therein;

[0030] Figure 3 is a schematic structural diagram of the oxygen pump device in the present invention;

[0031] Figure 4 is a schematic structural diagram of the water injection device in the present invention.

[0032] In the figure: 1, reaction tank; 2, heat source; 3, water injection device; 4, circulation device; 5, oxygen pump device; 6, condenser; 7, hydrogen collector; 81, vertical partition board; 82, horizontal partition board; 9, heating area; 10, hydrogen detector; 31, water injection pipe; 32, water injection nozzle; 33, housing; 34, first partition board; 35, first cavity; 36, first water injection hole; 37, second partition board; 38, second cavity; 39, second water injection hole; 41, driving pump; 42, inflow pipe; 43, outflow pipe; 44, exhaust passage; 51, power supply; 52, switch; 53, anode; 54, cathode; 55, rheostat; 56, voltage measuring device; 57, tubular ceramic membrane. Specific embodiments

[0033] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present invention and are not used to limit the protection scope of the present invention. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0034] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the relevant devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, ordinal numbers such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In addition, it should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] As Figures 1-4 shown, the present invention provides a hydrogen production device using a liquid metal coolant. The hydrogen production device using a liquid metal coolant includes a reaction tank 1 for containing the liquid metal coolant. A heat source 2 is arranged in the reaction tank 1, which is arranged in the reaction tank 1 and is used to maintain the liquid metal coolant at a certain temperature. In order to facilitate heating the liquid metal coolant and make the heating effect uniform, the heat source 2 is arranged in the center of the reaction tank 1. The heat source 2 can be an electric heating, reactor heat energy or other heating devices selected according to actual situations, as long as it can be used to heat the liquid metal coolant. Such a change does not deviate from the principle and scope of the present invention.

[0037] The water injection device 3 is arranged in the reaction pool 1 and is used for injecting water into the liquid metal coolant; the circulation device 4 is arranged in the reaction pool 1 and is used to circulate the liquid metal coolant in the reaction pool 1. The heat source 2 is located on the outlet side of the circulation device 4. On the one hand, it is convenient to heat the cooled liquid metal coolant, and on the other hand, it shortens the distance for the heated liquid metal coolant to reach the reaction position. In order to drive the circulation of the liquid metal coolant in the entire reaction pool 1, there are two circulation devices 4, which are symmetrically arranged on both sides of the heat source 2. In order to improve the reaction speed, a plurality of water injection devices 3 can be set, and the plurality of water injection devices 3 are distributed on both sides of the circulation device 4 along the inner peripheral wall of the reaction pool 1; and the oxygen pump device 5 is arranged in the reaction pool 1. After water contacts the liquid heavy metal coolant, it quickly evaporates to generate water vapor. The water vapor undergoes a cracking reaction with the liquid heavy metal coolant at high temperature and is decomposed into hydrogen and dissolved oxygen ions. When the concentration of oxygen ions increases, the reaction will be inhibited; the oxygen ions form oxygen at the anode of the oxygen pump device 5, and then the oxygen is extracted, so that the concentration of oxygen ions in the reaction pool 1 can be controlled, and the hydrogen production reaction can be promoted to proceed in the forward direction; since the liquid metal coolant reacts with water near the water injection device 3, a plurality of oxygen pump devices 5 can be set, and they are all arranged around the water injection device 3.

[0038] In this embodiment, the circulation device 4 promotes the circulation of the liquid metal coolant in the entire reaction pool 1. After the heat source 2 and the circulation device 4 cooperate, the cooled liquid metal coolant can be continuously pumped out, and at the same time, the heated liquid metal coolant is transported to the reaction position. Coupled with the continuous water injection of the water injection device 3, the hydrogen production reaction can proceed continuously and efficiently; the oxygen pump device 5 can convert the oxygen ions generated by the hydrogen production reaction into oxygen, control the concentration of oxygen ions within a suitable range, and prevent the hydrogen production reaction from being inhibited after the concentration of oxygen ions increases; in this embodiment, multiple influencing factors in the hydrogen production reaction process are considered, and the hydrogen production efficiency is improved through the mutual cooperation of the heat source 2, the water injection device 3, the circulation device 4, and the oxygen pump device 5.

[0039] As Figure 2As shown in the figure, in this embodiment, to solve the problem that the water injection pipe is easily blocked, the water injection device 3 includes: a water injection pipe 31, one end of the water injection pipe 31 is used to connect to an external water source, and the other end extends into the liquid metal coolant; a water injection nozzle 32, which is arranged at the other end of the water injection pipe 31 and is communicated with the water injection pipe 31. The upper surface of the water injection nozzle 32 is located below the liquid level of the liquid metal coolant, so that after the water is ejected, it can react with the liquid metal coolant. The water injection pipe 31 is connected to the water injection nozzle 32, so a part of the water injection pipe 31 will be immersed in the liquid metal coolant, but the top of the water injection pipe 31 is located above the liquid level of the liquid metal coolant. In this way, even if some liquid metal coolant flows back into the water injection nozzle 32, it will not exceed the liquid level of the liquid metal coolant. The liquid metal coolant in the water injection nozzle 32 is still in a high-temperature state and will not solidify upon cooling. As long as the water pressure is increased, the liquid metal coolant can be pushed out of the water injection nozzle 32.

[0040] If water outlet holes are directly arranged on the water injection pipe 31, the liquid metal coolant may enter the water injection pipe 31 from any one of the water outlet holes, causing blockage; in this solution, water is sprayed through the water injection nozzle 32, which can prevent the liquid metal coolant from directly entering the water injection pipe 31 and can also adjust the position of the reaction by adjusting the position of the water injection nozzle 32. Further, to simplify the structure of the water injection pipe 31, the water injection pipe 31 can extend into the liquid metal coolant in the vertical direction.

[0041] Since the liquid metal coolant reacts with water near the second water injection hole 39, in order to quickly produce oxygen from the generated oxygen ions and discharge it, several oxygen pump devices 5 can be arranged around the water injection pipe 31.

[0042] Further, as Figure 2 shown, the liquid metal coolant hydrogen production device further includes: a condenser 6, which is arranged outside the reaction tank 1 and is communicated with the top of the reaction tank 1. After the hydrogen and vaporized water at the top of the reaction tank 1 enter the condenser 6, the gaseous water cools and turns into liquid, remaining in the condenser 6, and the hydrogen enters the hydrogen collector 7 after passing through the hydrogen detector 10; the condenser 6 and the water injection pipe 31 can be connected through a one-way valve. After the condensed water in the condenser 6 reaches a certain amount, it is discharged into the water injection pipe 31 for secondary use; to prevent the water in the condenser 6 from flowing back into the reaction tank 1, the connection point of the condenser 6 and the reaction tank 1 is higher than the connection point of the condenser 6 and the water injection pipe 31.

[0043] Further, as Figure 2As shown in the figure, in this embodiment, the circulation device 4 includes: a driving pump 41, which can be an impeller pump, and the driving pump 41 includes an impeller part; an inflow pipe 42 and an outflow pipe 43 are respectively arranged at both ends of the driving pump 41. The reacted liquid metal coolant is sucked into the driving pump 41 from the inflow pipe 42 and discharged from the outflow pipe 43 after passing through the impeller part of the driving pump 41. The outlet of the outflow pipe 43 is close to the heat source 2, which is convenient for heating the cooled liquid metal coolant and also shortens the distance for the heated liquid metal coolant to flow to the reaction position.

[0044] Since a part of the hydrogen generated during the reaction will be mixed with the liquid metal coolant, in order to separate the hydrogen from the liquid metal coolant, the inflow pipe 42 is set as a U-shaped pipe. Due to the large density difference between the liquid metal coolant and hydrogen, when the liquid metal coolant flows in the U-shaped pipe, it can be easily separated from the hydrogen. Then the separated hydrogen is collected to avoid the liquid metal coolant carrying gas for circulation, making the heating of the liquid metal coolant by the heat source 2 more sufficient and increasing the contact area between the liquid metal coolant and water, thus improving the hydrogen production efficiency.

[0045] Furthermore, since hydrogen is separated at both the inflow pipe 42 and the driving pump 41, the circulation device 4 further includes an exhaust passage 44. The driving pump 41 also includes a pump shaft part. The gap formed between the pump shaft part of the driving pump 41 and the housing or other parts is the exhaust passage 44. The exhaust passage 44 is communicated with both the inflow pipe 42 and the impeller part of the driving pump 41, and can also be communicated with the outflow pipe 43. The hydrogen in the inflow pipe 42 and the hydrogen in the impeller part of the driving pump 41 are both discharged through the exhaust passage 44. If there is residual hydrogen in the outflow pipe 43, it can also be discharged through the exhaust passage 44. The exhaust passage 44 can be located vertically above the inflow pipe 42 and the impeller part. After the hydrogen and the liquid metal coolant are separated, the hydrogen has a small density and can be directly discharged along the upper exhaust passage 44.

[0046] Furthermore, as Figures 1-2 shown in the figure, in this embodiment, in order to enable the water to react with the liquid metal coolant in full contact and reaction, the preferred solution is that the water is sprayed upward to react with the high-temperature liquid metal coolant above, and the liquid metal coolant with reduced temperature after reacting with the water flows out from below. In order to make the circulation of the liquid metal coolant in the reaction tank 1 proceed orderly, the liquid metal coolant hydrogen production device further includes: a partition plate, which is arranged in the reaction tank 1, and the partition plate is arranged vertically around the heat source 2 to form a heating area 9; the cooled liquid metal coolant is pumped into the driving pump 41 from the inflow pipe 42, then flows into the heating area 9 through the outflow pipe 43, is heated when passing through the heat source 2, and flows to the side of the water injection device 3 after flowing out of the heating area 9 to react with the water.

[0047] Further, the partition plate includes a vertical partition plate 81 and a horizontal partition plate 82. The vertical partition plate 81 is arranged around the heat source 2 in the vertical direction to form a heating zone 9. The vertical partition plate 81 can limit the flow direction of the heated liquid metal coolant in the heating zone 9. The vertical partition plate 81 can be arranged continuously or at intervals, and its cross-section can be square, circular, or other suitable forms, as long as it can limit the flow direction of the heated liquid metal coolant. From Figure 2 As can be seen, the horizontal partition plate 82 is arranged above the inflow pipe 42 in the horizontal direction to prevent the heated liquid metal coolant from being directly sucked into the inflow pipe 42. From Figure 1 As can be seen, the circulation device 4 is arranged beside the water injection device 3, near the position where the hydrogen production reaction occurs. The inflow pipe 42 can suck the cooled liquid metal coolant from below the horizontal partition plate 82.

[0048] Further, since the heat source 2 is arranged at the bottom of the reaction tank 1, the outflow pipe 43 is arranged below the inflow pipe 42 in the vertical direction. In this way, the liquid metal coolant flowing out of the outflow pipe 43 will flow from top to bottom into the vicinity of the water injection device 3 after passing through the heating zone 9, which is convenient for reacting with water.

[0049] Further, as Figure 3 shown, in order to make the water spray evenly, the water injection nozzle 32 includes: a housing 33; a first partition plate 34, which is arranged on the housing 33. A first cavity 35 is formed between the first partition plate 34 and the housing 33. The water injection pipe 31 is communicated with the first cavity 35; a first water injection hole 36, which is arranged on the first partition plate 34. After the water in the water injection pipe 31 flows into the first cavity 35, it then flows out from the first water injection hole 36, making the water in the water injection pipe 31 spray more evenly, increasing the contact area between the water and the liquid metal coolant, and improving the reaction efficiency.

[0050] To make the water spray out more evenly, the water injection nozzle 32 further includes: a second partition plate 37 disposed on the housing 33. A second cavity 38 is formed between the first partition plate 34 and the second partition plate 37. The first cavity 35 and the second cavity 38 are communicated through a first water injection hole 36; a second water injection hole 39 disposed on the second partition plate 37. After the water in the water injection pipe 31 flows into the first cavity 35, most of the water may flow out from the first water injection hole 36 close to the water injection pipe 31. After setting the second cavity 38, the water flow flows into the second cavity 38 after flowing out from the first water injection hole 36, and then sprays out more evenly from the second water injection hole 39, further improving the reaction efficiency. If the second cavity 38 is located below the first cavity 35 in the vertical direction, the generated hydrogen rises and may enter the water injection nozzle 32, affecting the progress of the reaction. Therefore, the second cavity 38 can be arranged above the first cavity 35 in the vertical direction; since the second cavity 38 is located above the first cavity 35 in the vertical direction and the water sprays upward, the oxygen pump device 5 can be arranged above the second partition plate 37 to facilitate the hydrogen production reaction.

[0051] As Figure 4 shown, to solve the problem of improving the hydrogen production efficiency, the oxygen pump device 5 includes: a power source 51, the power source 51 is connected to a switch 52, and the switch 52 is used to control the on and off of the power source 51; an anode 53 disposed in the reaction tank 1 and connected to the positive electrode of the power source 51. The anode can use platinum (Pt) as the material for oxygen evolution; a cathode 54 disposed in the reaction tank 1 and connected to the negative electrode of the power source 51; a rheostat 55 connected in series with the power source 51. According to the size of the oxygen ion concentration in the center of the reaction tank 1, the resistance value of the rheostat 55 is adjusted to change the voltage between the anode 53 and the cathode 54 when the switch 52 is closed, promoting the oxygen evolution rate, thereby improving the hydrogen production efficiency.

[0052] As Figure 4 shown, the power source 51, the switch 52, the rheostat 55 and the anode 53 are connected in sequence. The rheostat 55 can be a sliding rheostat. When the switch 52 is closed, when the oxygen ion concentration is high, the rheostat 55 slides upward to increase the voltage value of the electrode; when the oxygen ion concentration is low, the rheostat 55 slides downward to decrease the voltage value of the electrode, promoting oxygen evolution.

[0053] Furthermore, in this embodiment, in order to measure the oxygen concentration in the liquid metal, the oxygen pump device 5 further includes: a voltage measuring device 56, which is used to measure the voltage between the cathode 54 and the anode 53 when the switch 52 is in the off state. The voltage measuring device 56 can be a voltmeter. When the switch 52 is in the open state, the rheostat 55 slides to the uppermost section. Due to the migration of oxygen ions, an oxygen ion concentration difference is formed between the anode 53 and the cathode 54 to generate an electromotive force. By measuring the magnitude of the voltage through the voltage measuring device 56, the relationship between the voltage signal and the oxygen ion concentration can be deduced, thereby realizing the measurement of the oxygen concentration in the liquid metal, and the structure is simple, which is convenient for manufacturing and operation.

[0054] The oxygen pump device 5 further includes: a tubular ceramic membrane 57. The anode 53 is arranged inside the tubular ceramic membrane 57. After oxygen ions pass through the tubular ceramic membrane 57, oxygen is formed at the anode 53. In order to enable the hydrogen production reaction to proceed continuously, a ceramic material with low resistance is selected as the electrolyte layer.

[0055] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A hydrogen production device using a liquid metal coolant with an oxygen pump device. The liquid metal coolant hydrogen production device includes a reaction tank (1) filled with a liquid metal coolant. A heat source (2), a water injection device (3), a circulation device (4), and an oxygen pump device (5) are also arranged in the reaction tank (1). The heat source (2) is used to maintain the liquid metal coolant at a certain temperature. The water injection device (3) is used to inject water into the liquid metal coolant. The circulation device (4) is used to make the liquid metal coolant circulate in the reaction tank (1). The oxygen pump device (5) is used to promote the reaction between the liquid metal coolant and water. It is characterized in that It further includes: A partition plate, which is arranged in the reaction tank (1); the partition plate includes a vertical partition plate (81) and a horizontal partition plate (82). The vertical partition plate (81) is arranged around the heat source (2) in the vertical direction to form a heating area (9); the horizontal partition plate (82) is arranged above the circulation device (4) in the horizontal direction. The water injection device (3) includes: A water injection pipe (31), which extends vertically into the reaction tank (1). A water injection nozzle (32), which is arranged below the water injection pipe (31) and is connected to the water injection pipe (31). The upper surface of the water injection nozzle (32) is located below the liquid level of the liquid metal coolant, and the water injection nozzle (32) sprays water upward; several oxygen pump devices (5) are arranged around the water injection device (3). The water injection nozzle (32) includes: a housing (33); a first partition plate (34), which is arranged on the housing (33). A first cavity (35) is formed between the first partition plate (34) and the housing (33). The water injection pipe (31) is connected to the first cavity (35); a first water injection hole (36), which is arranged on the first partition plate (34). The water in the water injection pipe (31) flows into the first cavity (35) and then flows out from the first water injection hole (36). The oxygen pump device (5) includes: A power supply (51), which is connected to a switch (52). The switch (52) is used to control the on / off of the power supply (51). An anode (53), which is arranged in the reaction tank (1) and is connected to the positive electrode of the power supply (51). A cathode (54), which is arranged in the reaction tank (1) and is connected to the negative electrode of the power supply (51). A rheostat (55), which is connected in series with the power supply (51). The rheostat (55) is used to change the voltage between the anode (53) and the cathode (54) when the switch (52) is closed. A voltage measuring device (56), which is used to measure the voltage between the cathode (54) and the anode (53) when the switch (52) is open.

2. The hydrogen production device of the liquid metal coolant with an oxygen pump device according to claim 1, characterized in that, The oxygen pump device (5) further includes: A tubular ceramic membrane (57), with the anode (53) disposed inside the tubular ceramic membrane (57), and oxygen ions form oxygen at the anode (53) after passing through the tubular ceramic membrane (57).

3. The liquid metal coolant hydrogen production device with an oxygen pump device according to claim 1, characterized in that The oxygen pump devices (5) are all arranged around the water injection pipe (31) and are located above the water injection nozzle (32).

4. The hydrogen production device using a liquid metal coolant with an oxygen pump device according to claim 1, characterized in that, The liquid metal coolant hydrogen production device further comprises: A circulation device (4) for driving the liquid metal coolant in the reaction tank (1) to circulate.

5. The hydrogen production device with a liquid metal coolant having an oxygen pump device according to claim 1, wherein, The liquid metal coolant hydrogen production device further comprises: A condenser (6) disposed outside the reaction tank (1) and communicating with the top of the reaction tank (1), and hydrogen and vaporized water at the top of the reaction tank (1) enter the condenser (6).

6. The liquid metal coolant hydrogen production device with an oxygen pump device according to claim 5, characterized in that The condenser (6) is communicated with the water injection pipe (31), and the connection point of the condenser (6) with the reaction tank (1) is higher than the connection point of the condenser (6) with the water injection pipe (31).

7. The hydrogen production device using a liquid metal coolant with an oxygen pump device according to claim 5, characterized in that, The liquid metal coolant hydrogen production device further comprises: A hydrogen collector (7) communicated with the condenser (6) for collecting hydrogen.

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