Isobaric electrolyte deionization circulation system and electrolytic hydrogen production system

Abstract

The invention discloses an isobaric electrolyte deionization circulation system and an electrolytic hydrogen production system. The isobaric electrolyte deionization circulating system comprises an electrolytic bath, a circulating pump, an oxygen and water separating tank, a water supplementing tank, a deionization module and a circulating bypass module. The electrolytic cell comprises an electrolyte inlet and an oxygen outlet. And the circulating pump is communicated with the electrolyte inlet through a liquid inlet pipeline. And the oxygen and water separating tank is communicated with the circulating pump and the oxygen outlet. And the water replenishing tank is communicated with the oxygen and water separating tank. The deionization module communicates with the water supplementing tank and is used for deionizing water in the water supplementing tank. The circulating bypass module is communicated with the water supplementing tank and a liquid inlet pipeline at the downstream of the circulating pump, and the circulating bypass module is used for distributing water in the liquid inlet pipeline to the water supplementing tank. According to the isobaric electrolyte deionization circulation system, deionization operation is allowed to be carried out in the hydrogen production process, the high purity of the electrolyte can be maintained under the condition that the hydrogen production process is not interrupted, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of electrolytic hydrogen production technology, and more specifically to an isobaric electrolyte deionization circulation system and an electrolytic hydrogen production system. Background Technology

[0002] Currently, in existing proton exchange membrane electrolysis water production systems, after long-term circulation of the electrolyte (deionized water), the conductivity increases due to the dissolution of metal ions, which affects the electrolysis efficiency and may lead to catalyst poisoning and damage to the proton exchange membrane. Therefore, proton exchange membrane electrolysis water production systems need to be equipped with polishing resin as a deionization device to purify the electrolyte.

[0003] The hydrogen-side working pressure of proton exchange membrane electrolysis water production systems is generally higher than or equal to 3 MPa. However, the physical properties of polishing resin cannot withstand high temperature and high pressure, so it cannot be used directly in high-pressure electrolyte systems. Existing hydrogen suppression systems with high pressure on the hydrogen and oxygen sides generally interrupt the hydrogen production process, stop the machine to release pressure, and then perform deionization. The system is restarted only after the conductivity of the deionized water meets the requirements, which leads to a decrease in working efficiency.

[0004] Therefore, an isobaric electrolyte deionization circulation system and an electrolytic hydrogen production system are needed to at least partially solve the above problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This summary section is not intended to limit the key and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially address the aforementioned problems, a first aspect of this application provides an isobaric electrolyte deionization circulation system for use in an electrolytic hydrogen production system, the isobaric electrolyte deionization circulation system comprising: An electrolytic cell, the electrolytic cell including an electrolyte inlet and an oxygen outlet; A circulation pump, wherein the circulation pump is connected to the electrolyte inlet via an inlet pipe; An oxygen-water slurry tank, which is connected to the circulating pump and the oxygen outlet; A water replenishment tank, which is connected to the oxygen-water silo tank; A deionization module, connected to the water replenishment tank, is used to deionize the water in the water replenishment tank; and A circulation bypass module is provided, which is connected to the water replenishment tank and also connected to the liquid inlet pipe downstream of the circulation pump. The circulation bypass module is used to divert water in the liquid inlet pipe to the water replenishment tank.

[0007] The isobaric electrolyte deionization circulation system of this application allows for deionization during hydrogen production, maintaining high electrolyte purity without interrupting the hydrogen production process and improving production efficiency.

[0008] Optionally, the water replenishment tank is equipped with a first conductivity meter, and the isobaric electrolyte deionization circulation system further includes a control device. The control device is signal-connected to the first conductivity meter and the deionization module, and the control device is configured as follows: When the detection value of the first conductivity meter is greater than or equal to the first threshold, the deionization module is controlled to deionize the water in the water replenishment tank.

[0009] Based on the above settings, deionization can be activated when the conductivity of the water in the water tank is too high.

[0010] Optionally, the deionization module includes: A deionization device, wherein both the inlet and outlet of the deionization device are connected to the water replenishment tank; and A deionization pump, which is connected between the water replenishment tank and the inlet of the deionization device; The control device is configured to: control the deionization pump to turn on when the detection value of the first conductivity meter is greater than or equal to a first threshold, and control the deionization pump to turn off when the detection value of the first conductivity meter is less than or equal to a second threshold, wherein the second threshold is less than the first threshold. According to this scheme, the deionization operation can be started and stopped via the deionization pump.

[0011] Optionally, the oxygen-water separation tank is equipped with a second conductivity meter, and the inlet pipe is equipped with a third conductivity meter. The control device is also connected to the second conductivity meter and the third conductivity meter via signal connection. The control device is configured as follows: When the detection value of either the second conductivity meter or the third conductivity meter is greater than or equal to the first threshold, the circulation bypass module is controlled to deliver water to the water replenishment tank and replenish water to the oxygen-water condensation tank. When the detection values ​​of both the second and third conductivity meters are less than or equal to the second threshold, the supply of water to the water replenishment tank is stopped, and the replenishment of water to the oxygen-water slurry tank is also stopped. According to the above settings, when the conductivity at any point in the oxygen-water slurry tank or the inlet pipeline is too high, the water in the oxygen-water slurry tank and the inlet pipeline can be diluted through a diversion step to reduce the conductivity.

[0012] Optionally, the loop bypass module includes: A circulation bypass, one end of which is connected to the water replenishment tank and the other end of which is connected to the liquid inlet pipe downstream of the circulation pump; A switching valve is provided in the circulation bypass, and the control device is also signal-connected to the switching valve; The control device is configured to: when the detection value of any one of the second conductivity meter and the third conductivity meter is greater than or equal to the first threshold, control the switch valve to open to deliver water to the water replenishment tank and replenish water to the oxygen-water condensate tank; When the detection values ​​of both the second and third conductivity meters are less than or equal to the second threshold, the switching valve is controlled to close to stop the supply of water to the makeup water tank and to stop the replenishment of water to the oxygen-water separation tank. Based on the above settings, the switching valve can be used to control the diversion of the circulation bypass module to the makeup water tank.

[0013] Optionally, the water replenishment tank is connected to the oxygen-water separation tank via a water replenishment pipeline, a water replenishment pump is installed on the water replenishment pipeline, and the control device is signal-connected to the water replenishment pump; The control device is configured to: when the detection value of any one of the second conductivity meter and the third conductivity meter is greater than or equal to the first threshold, control the switch valve to open to deliver water to the water replenishment tank, and control the water replenishment pump to open to replenish water to the oxygen-water slurry tank; When the detection values ​​of both the second and third conductivity meters are less than or equal to the second threshold, the switch valve is closed to stop water supply to the water replenishment tank, and the water replenishment pump is closed to stop replenishing water to the oxygen-water slurry tank. Based on the above settings, water can be replenished to the oxygen-water slurry tank in a timely manner to dilute the water.

[0014] Optionally, the circulation bypass module further includes a first regulating valve and a first flow meter, wherein the first regulating valve and the first flow meter are disposed in the circulation bypass, and the control device is also signal-connected to the first regulating valve and the first flow meter; The control device is further configured to control the opening of the first regulating valve according to the signal from the first flow meter, so as to balance the inlet and outlet water flow of the oxygen-water slurry tank.

[0015] Optionally, a second flow meter and a second regulating valve are provided on the water supply pipeline, and the control device is signal-connected to the second flow meter and the second regulating valve; The control device is further configured to control the opening degree of the second regulating valve according to the signal from the second flow meter, so as to balance the inlet and outlet water flow rates of the oxygen-water slurry tank. According to this solution, the inlet and outlet water flow rates of the oxygen-water slurry tank can be made equal.

[0016] Optionally, the deionization device includes two resin tanks connected in parallel, with shut-off valves installed upstream and downstream of each resin tank, allowing the two resin tanks to operate alternately. According to this solution, the deionization operation can be performed continuously.

[0017] Optionally, the water replenishment tank is equipped with a breather valve. According to this solution, pressure balance within the water replenishment tank can be achieved.

[0018] The second aspect of this application provides an electrolytic hydrogen production system, the electrolytic hydrogen production system comprising the isobaric electrolyte deionization circulation system described in the first aspect above.

[0019] The electrolytic hydrogen production system according to this application allows for deionization during the hydrogen production process, maintaining high electrolyte purity without interrupting the hydrogen production process and improving production efficiency. Attached Figure Description

[0020] The following figures are included as part of this application for understanding the application. The figures illustrate embodiments of the application and their descriptions, serving to explain the principles of the application. In the figures: Figure 1 This is a schematic diagram of an isobaric electrolyte deionization circulation system according to one embodiment of this application; Figure 2 This is a schematic diagram of the startup process of an isobaric electrolyte deionization circulation system according to one embodiment of this application; and Figure 3 This is a schematic diagram of the shutdown process of an isobaric electrolyte deionization circulation system according to one embodiment of this application.

[0021] Explanation of reference numerals in the attached figures: 100: Electrolyte deionization circulation system; 110: Electrolytic cell 120: Circulation pump; 121: Inlet pipe 122: Third conductivity meter; 130: Circulation bypass 131: Switch valve; 132: First regulating valve 133: First flow meter; 140: Oxygen-water silo tank. 141: Second conductivity meter; 150: Water replenishment tank 151: Breathing valve; 152: First conductivity meter 160: Water supply pump; 170: Water supply pipeline 171: Second regulating valve; 172: Second flow meter 180: Deionization unit; 181: Resin tank 182: Shut-off valve 183: Deionization pump 190: Heat exchanger; 101: Deionization module 102: Loop Bypass Module Detailed Implementation

[0022] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with this application.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0024] The ordinal numbers such as “first” and “second” used in this application are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term “first component” does not imply the existence of a “second component,” and the term “second component” does not imply the existence of a “first component.” It should be noted that the terms “upper,” “lower,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0025] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings.

[0026] refer to Figure 1 This application provides an isobaric electrolyte deionization circulation system 100, which includes an electrolytic cell 110, a circulation pump 120, an oxygen-water separation tank 140, a water replenishment tank 150, a deionization module 101, and a circulation bypass module 102.

[0027] Electrolyzer 110 includes an electrolyte inlet and an oxygen outlet. A circulation pump 120 is connected to the electrolyte inlet via an inlet pipe 121. An oxygen-water separation tank 140 is connected to the circulation pump 120 and the oxygen outlet. A makeup water tank 150 is connected to the oxygen-water separation tank 140. A deionization module 101 is connected to the makeup water tank 150 and is used to deionize the water in the makeup water tank. A circulation bypass module 102 is connected to the makeup water tank 150 and the downstream inlet pipe 121 of the circulation pump 120, and the circulation bypass module 102 is used to divert water from the inlet pipe 121 to the makeup water tank 150.

[0028] The isobaric electrolyte deionization circulation system 100 of this application allows deionization during hydrogen production, maintaining high electrolyte purity without interrupting the hydrogen production process and improving production efficiency.

[0029] The deionization unit 180 includes two resin tanks 181, which are preferably connected in parallel. Each resin tank 181 is equipped with a shut-off valve 182 upstream and downstream, allowing the two resin tanks 181 to operate alternately. The resin tanks 181 are preferably filled with polishing resin. The water replenishment tank 150 is preferably equipped with a breather valve 151 to balance the pressure inside the water replenishment tank with the external pressure.

[0030] More specifically, the water replenishment tank 150 is equipped with a first conductivity meter 152 for monitoring the conductivity of the water in the water replenishment tank 150. The oxygen-water slurry tank 140 is equipped with a second conductivity meter 141, and the liquid inlet pipe 121 is equipped with a third conductivity meter 122, for monitoring the conductivity of the water in the oxygen-water slurry tank 140 and the conductivity of the water entering the electrolysis cell 110, respectively.

[0031] The deionization module 101 includes a deionization device 180 and a deionization pump 183. The inlet and outlet of the deionization device 180 are both connected to the water supply tank 150. The deionization pump 183 is connected between the water supply tank 150 and the inlet of the deionization device 180, and is used to supply water to the deionization device 180.

[0032] The circulation bypass module 101 includes a circulation bypass 130 and a switching valve 131. One end of the circulation bypass 130 is connected to the water replenishment tank 150, and the other end is connected to the inlet pipeline 121 downstream of the circulation pump 120. The switching valve 131 is installed on the circulation bypass 130.

[0033] In addition to the aforementioned on / off valve 131, the circulation bypass 130 is also equipped with a first regulating valve 132 and a first flow meter 133. The makeup water tank 150 is connected to the oxygen-water separation tank 140 via a makeup water pipeline 170, which is equipped with a makeup water pump 160, a second flow meter 172, and a second regulating valve 171. Furthermore, a heat exchanger 190 is preferably installed on the pipeline between the oxygen-water separation tank 140 and the circulation pump 120 to dissipate heat and cool the water entering the electrolyzer 110.

[0034] refer to Figure 2 The isobaric electrolyte deionization circulation system 100 also includes a control device (not shown), which is signal-connected to the circulation pump 120 and configured to control the circulation pump 120 to turn on when the electrolytic hydrogen production system is started.

[0035] The control device is connected to the first conductivity meter 152 and the deion pump 183. The control device is configured to control the deion module 101 to deionize the water in the water replenishment tank 150 when the detection value of the first conductivity meter 152 is greater than or equal to a first threshold. The flow of water from the water replenishment tank 150 to the deion device 180 can be achieved by the deion pump 183.

[0036] Specifically, the control device is configured as follows: when the detection value of the first conductivity meter 152 is greater than or equal to a first threshold, the deion pump 183 is controlled to turn on; when the detection value of the first conductivity meter 152 is less than or equal to a second threshold, the deion pump 183 is controlled to turn off, wherein the second threshold is less than the first threshold. As one implementation, the first threshold is 0.2 μS / cm, and the second threshold is 0.1 μS / cm.

[0037] The control device is also connected to the second conductivity meter 141, the third conductivity meter 122, the switching valve 131, the first regulating valve 132, the first flow meter 133, the water supply pump 160, the second flow meter 172, and the second regulating valve 171.

[0038] The control device is also configured to control the circulation bypass module 101 to supply water to the water replenishment tank 150 when the detection value of the second conductivity meter 141 and / or the third conductivity meter 122 is greater than or equal to the first threshold. Simultaneously, to maintain the liquid level in the oxygen-water separation tank 140 and reduce the ion concentration of the water in the oxygen-water separation tank 140, water also needs to be replenished to the oxygen-water separation tank 140. When the detection values ​​of both the second conductivity meter 141 and the third conductivity meter 122 are less than or equal to the second threshold, the supply of water to the water replenishment tank 150 and the replenishment of water to the oxygen-water separation tank 140 are stopped. In other words, as long as the monitoring value of either the second conductivity meter 141 or the third conductivity meter 122 exceeds the standard, water from the water replenishment tank 150 is supplied to the oxygen-water separation tank 140, thereby rapidly diluting the water entering the electrolysis cell 110.

[0039] More specifically, the flow from the circulation bypass module 101 to the water replenishment tank 150 can be achieved through the switching valve 131 on the circulation bypass 130 and the circulation pump 120. Water replenishment from the water replenishment tank 150 to the oxygen-water separation tank 140 can be achieved through the water replenishment pipeline 170 and the water replenishment pump 160.

[0040] As one implementation, the control device is also configured to: control the opening of the switch valve 131 to deliver water to the water replenishment tank 150 when the detection value of the second conductivity meter 141 and / or the third conductivity meter 122 is greater than or equal to the first threshold, and simultaneously control the opening of the water replenishment pump 160 to replenish water to the oxygen-water separation tank 140; and control the closing of the switch valve 131 and the water replenishment pump 160 when the detection values ​​of both the second conductivity meter 141 and the third conductivity meter 122 are less than or equal to the second threshold.

[0041] In summary, the detection values ​​of the second conductivity meter 141 and the third conductivity meter 122 are used to control the circulation bypass module 101 to flow water with high ion concentration to the water replenishment tank 150, and to control the water replenishment pump 160 to replenish water with low ion concentration from the water replenishment tank 160 to the oxygen-water separation tank 140, thereby reducing the water concentration in the oxygen-water separation tank 140. Meanwhile, the detection value of the first conductivity meter 152 is used to control the operation of the deionization module 101 to reduce the ion concentration in the water replenishment tank 160.

[0042] Furthermore, the control device also controls the opening of the first regulating valve 132 based on the signal from the first flow meter 133. For example, when the first flow meter 133 detects that the flow rate of the circulation bypass 130 is less than the required value, it controls the first regulating valve 132 to increase its opening; conversely, when the first flow meter 133 detects that the flow rate of the circulation bypass 130 is greater than the required value, it controls the first regulating valve 132 to decrease its opening. It also controls the opening of the second regulating valve 171 based on the signal from the second flow meter 172. For example, when the second flow meter 172 detects that the flow rate of water entering the oxygen-water splitting tank 140 is greater than the set value, it controls the second regulating valve 171 to decrease its opening; conversely, when the second flow meter 172 detects that the flow rate of water entering the oxygen-water splitting tank 140 is less than the set value, it controls the second regulating valve 171 to increase its opening.

[0043] Furthermore, the flow rates of the oxygen-water slurry tank 140 can be adjusted through flow control at these two points. Preferably, the inflow and outflow rates of the oxygen-water slurry tank 140 are balanced. Specifically, when the flow rate detected by the first flow meter 133 is greater than the flow rate detected by the second flow meter 172, the opening of the first regulating valve 132 is decreased and / or the opening of the second regulating valve 171 is increased. When the flow rate detected by the first flow meter 133 is less than the flow rate detected by the second flow meter 172, the opening of the first regulating valve 132 is increased and / or the opening of the second regulating valve 171 is decreased.

[0044] When the electrolysis hydrogen production system is shut down, reference Figure 3 First, control the shut-off valve 131, the first regulating valve 132, the water replenishment pump 160, the second regulating valve 171, and the deionization pump 183 to shut down, and then control the circulation pump 120 to shut down.

[0045] The second aspect of this application provides an electrolytic hydrogen production system, which includes the isobaric electrolyte deionization circulation system 100 described in the first aspect.

[0046] The electrolytic hydrogen production system according to this application has similar technical effects to the isobaric electrolyte deionization circulation system 100 of the first aspect described above.

[0047] The processes and steps described in all the preferred embodiments above are merely examples. Unless adverse effects occur, various processing operations can be performed in a different order than the above-described processes. The order of steps in the above processes can also be added, combined, or deleted according to actual needs.

[0048] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0049] This application has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative purposes. This application is not limited to the above embodiments. Many variations and modifications can be made based on the teachings of this application, and all such variations and modifications fall within the scope of protection claimed in this application.

Claims

1. An isobaric electrolyte deionization circulation system for use in an electrolytic hydrogen production system, characterized in that, The isobaric electrolyte deionization circulation system includes: An electrolytic cell, the electrolytic cell including an electrolyte inlet and an oxygen outlet; A circulation pump, wherein the circulation pump is connected to the electrolyte inlet via an inlet pipe; An oxygen-water slurry tank, which is connected to the circulating pump and the oxygen outlet; A water replenishment tank, which is connected to the oxygen-water silo tank; A deionization module, connected to the water replenishment tank, is used to deionize the water in the water replenishment tank; and A circulation bypass module is provided, which is connected to the water replenishment tank and also connected to the liquid inlet pipe downstream of the circulation pump. The circulation bypass module is used to divert water in the liquid inlet pipe to the water replenishment tank.

2. The isobaric electrolyte deionization circulation system according to claim 1, characterized in that, The water replenishment tank is equipped with a first conductivity meter, and the isobaric electrolyte deionization circulation system further includes a control device. The control device is signal-connected to the first conductivity meter and the deionization module, and the control device is configured as follows: When the detection value of the first conductivity meter is greater than or equal to the first threshold, the deionization module is controlled to deionize the water in the water replenishment tank.

3. The isobaric electrolyte deionization circulation system according to claim 2, characterized in that, The deionization module includes: A deionization device, wherein both the inlet and outlet of the deionization device are connected to the water replenishment tank; and A deionization pump, which is connected between the water replenishment tank and the inlet of the deionization device; The control device is configured to: control the deion pump to turn on when the detection value of the first conductivity meter is greater than or equal to a first threshold, and control the deion pump to turn off when the detection value of the first conductivity meter is less than or equal to a second threshold, wherein the second threshold is less than the first threshold.

4. The isobaric electrolyte deionization circulation system according to claim 1, characterized in that, The oxygen-water separation tank is equipped with a second conductivity meter, and the inlet pipe is equipped with a third conductivity meter. The control device is also connected to the second conductivity meter and the third conductivity meter via signal connection. The control device is configured as follows: When the detection value of either the second conductivity meter or the third conductivity meter is greater than or equal to the first threshold, the circulation bypass module is controlled to deliver water to the water replenishment tank and replenish water to the oxygen-water condensation tank. When the detection values ​​of the second conductivity meter and the third conductivity meter are both less than or equal to the second threshold, the supply of water to the water replenishment tank is stopped, and the replenishment of water to the oxygen-water condensation tank is also stopped.

5. The isobaric electrolyte deionization circulation system according to claim 4, characterized in that, The loop bypass module includes: A circulation bypass, one end of which is connected to the water replenishment tank and the other end of which is connected to the liquid inlet pipe downstream of the circulation pump; A switching valve is provided in the circulation bypass, and the control device is also signal-connected to the switching valve; The control device is configured to: when the detection value of any one of the second conductivity meter and the third conductivity meter is greater than or equal to the first threshold, control the switch valve to open to deliver water to the water replenishment tank and replenish water to the oxygen-water condensate tank; When the detection values ​​of the second conductivity meter and the third conductivity meter are both less than or equal to the second threshold, the switch valve is controlled to close to stop the water supply to the water tank and to stop the water supply to the oxygen-water condensate tank.

6. The isobaric electrolyte deionization circulation system according to claim 5, characterized in that, The water supply tank is connected to the oxygen-water separation tank via a water supply pipeline. A water supply pump is installed on the water supply pipeline, and the control device is signal-connected to the water supply pump. The control device is configured to: when the detection value of any one of the second conductivity meter and the third conductivity meter is greater than or equal to the first threshold, control the switch valve to open to deliver water to the water replenishment tank, and control the water replenishment pump to open to replenish water to the oxygen-water slurry tank; When the detection values ​​of the second conductivity meter and the third conductivity meter are both less than or equal to the second threshold, the switch valve is controlled to close to stop supplying water to the water replenishment tank, and the water replenishment pump is controlled to close to stop replenishing water to the oxygen-water slurry tank.

7. The isobaric electrolyte deionization circulation system according to claim 6, characterized in that, The circulation bypass module further includes a first regulating valve and a first flow meter. The first regulating valve and the first flow meter are disposed in the circulation bypass. The control device is also signal-connected to the first regulating valve and the first flow meter. The control device is further configured to control the opening of the first regulating valve according to the signal from the first flow meter, so as to balance the inlet and outlet water flow of the oxygen-water slurry tank.

8. The isobaric electrolyte deionization circulation system according to claim 7, characterized in that, The water supply pipeline is equipped with a second flow meter and a second regulating valve, and the control device is signal-connected to the second flow meter and the second regulating valve. The control device is further configured to control the opening of the second regulating valve according to the signal from the second flow meter, so as to balance the inlet and outlet water flow of the oxygen-water slurry tank.

9. The isobaric electrolyte deionization circulation system according to claim 1, characterized in that, The deionization device includes two resin tanks connected in parallel, with shut-off valves installed upstream and downstream of each resin tank to allow the two resin tanks to operate alternately.

10. The isobaric electrolyte deionization circulation system according to claim 1, characterized in that, The water replenishment tank is equipped with a breather valve.

11. An electrolytic hydrogen production system, characterized in that, The electrolytic hydrogen production system includes an isobaric electrolyte deionization circulation system according to any one of claims 1-10.

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