Water electrolysis system

Abstract

The utility model provides an electrolyzed water system, including electrolyzing cell, gas-liquid separation device and electrolyte regulating device, wherein electrolyzing cell is used for generating hydrogen and oxygen, gas-liquid separation device is communicated with electrolyzing cell, gas-liquid separation device can receive hydrogen and oxygen from electrolyzing cell and separate hydrogen and oxygen from gas-liquid separation device, and electrolyte regulating device is used for regulating the electrolyte. The electrolyte adjusting device is communicated with the gas-liquid separation device, and an electrolyte in the electrolyte adjusting device and an electrolyte in the gas-liquid separation device can complement each other. Compared with the prior art, the electrolyzed water system disclosed by the embodiment of the utility model can meet different requirements of the whole electrolyzed water system on electrolyte quantity in different operation power sections through the arrangement of the electrolyte adjusting device, so that the performance of the electrolytic bath can be effectively improved, and the energy consumption in the operation process of the electrolyzed water system can be reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydrogen production equipment, and specifically relates to an electrolysis water system. Background Technology

[0002] Currently, when the water electrolysis system is running, regardless of the power point at which the water electrolysis system is operating, the amount of electrolyte is basically based on the amount at the rated power point of the water electrolysis system. However, the amount of electrode liquid corresponding to the rated point is greater than the amount of electrolyte at the low power point. As a result, the temperature rise rate of the electrolyte is slower, and the time to reach the target temperature of the water electrolysis system will also be longer, which is not conducive to quickly exerting the performance of the electrolyzer.

[0003] To accommodate the rapid temperature rise of the water electrolysis system, a solution of adding a heater is usually adopted. However, adding a heater not only makes the structure of the entire system more complex, but also makes the control of the entire system more complex, thereby increasing the overall power consumption of the system.

[0004] Therefore, how to overcome the above-mentioned technical defects is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide an electrolysis water system that can meet the different requirements of the system for electrolyte volume at different operating power levels, which can not only effectively improve the performance of the electrolyzer, but also reduce the energy consumption during system operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An electrolysis water system, comprising:

[0008] An electrolytic cell is used to produce hydrogen and oxygen.

[0009] A gas-liquid separation device is connected to the electrolytic cell, receives the hydrogen and oxygen flowing out of the electrolytic cell, and separates the hydrogen and oxygen from the gas-liquid separation device;

[0010] An electrolyte conditioning device is connected to the gas-liquid separation device, and the electrolyte in the electrolyte conditioning device and the electrolyte in the gas-liquid separation device can complement each other.

[0011] Optionally, the electrolyte regulating device includes an electrolyte storage tank, a first electrolyte circulation pump, and an electrolyte replenishment pipeline. The two ends of the electrolyte replenishment pipeline are respectively connected to the electrolyte storage tank and the gas-liquid separation device, and the first electrolyte circulation pump is installed on the electrolyte replenishment pipeline.

[0012] Optionally, the electrolyte replenishment pipeline includes a main pipeline, a first branch pipeline and a second branch pipeline, the first electrolyte circulation pump is disposed on the main pipeline, and a first switch valve and a second switch valve are respectively disposed on both sides of the first electrolyte circulation pump.

[0013] One end of the first branch pipeline is located between the electrolyte storage tank and the first switch valve, and the other end is located between the second switch valve and the first electrolyte circulation pump. A third switch valve is also provided on the first branch pipeline.

[0014] One end of the second branch pipeline is located between the first switch valve and the first electrolyte circulation pump, and the other end is located between the gas-liquid separation device and the second switch valve. A fourth switch valve is also provided on the second branch pipeline.

[0015] Optionally, a pressure balancing pipeline is also provided between the electrolyte storage tank and the gas-liquid separation device.

[0016] Optionally, the gas-liquid separation device includes a cathode-side separation mechanism, an anode-side separation mechanism, and a heat exchange mechanism, all of which are connected to the electrolytic cell.

[0017] Optionally, the cathode-side separation mechanism includes a cathode-side separation tank and an oxygen delivery pipeline, one end of which is connected to the cathode-side separation tank and the other end of which is connected to the electrolytic cell;

[0018] The cathode-side separator is also equipped with an oxygen outlet.

[0019] Optionally, the anode-side separation mechanism further includes a cathode level gauge, which is used to detect the electrolyte level in the cathode-side separation tank.

[0020] Optionally, the anode-side separation mechanism includes an anode-side separation tank and a hydrogen delivery pipeline, with one end of the hydrogen delivery pipeline connected to the anode-side separation tank and the other end connected to the electrolytic cell;

[0021] The anode-side separator is also equipped with a hydrogen gas outlet.

[0022] Optionally, the anode-side separation mechanism further includes an anode level gauge, which is used to detect the electrolyte level in the anode-side separation tank.

[0023] Optionally, the heat exchange mechanism includes a heat exchanger, heat exchange pipelines, and connecting pipelines;

[0024] The connecting pipeline includes a first opening, a second opening and a third opening. The first opening is connected to one end of the heat exchanger, the second opening is connected to the anode-side separation tank, and the third opening is connected to the cathode-side separation tank.

[0025] One end of the heat exchange pipeline is connected to the electrolytic cell, and the other end is connected to the heat exchanger. A second electrolyte circulation pump is also provided on the heat exchange pipeline.

[0026] As can be seen from the above technical solutions, when the water electrolysis system is started, the electrolyte in the gas-liquid separation device can be controlled to be added to the electrolyte regulating device to reduce the amount of electrolyte in the gas-liquid separation device. At this time, heating the electrolysis cell can make the electrolyte in the gas-liquid separation device heat up quickly.

[0027] When the temperature of the electrolyte in the gas-liquid separator rises to the target temperature, the temperature will continue to rise. At this time, the electrolyte in the electrolyte regulating device is replenished into the gas-liquid separator. Since the temperature of the electrolyte in the electrolyte regulating device is low, it can appropriately prevent the temperature of the electrolyte in the gas-liquid separator from continuing to rise.

[0028] Compared with the prior art, the water electrolysis system disclosed in this embodiment of the present invention, through the setting of the electrolyte adjustment device, can meet the different requirements of the entire water electrolysis system for the amount of electrolyte at different operating power ranges. This not only effectively improves the performance of the electrolyzer, but also reduces the energy consumption during the operation of the water electrolysis system. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the water electrolysis system disclosed in the embodiment of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Electrolyte cell; 2. Electrolyte storage tank; 3. First electrolyte circulation pump; 4. Main pipeline; 5. First branch pipeline; 6. Second branch pipeline; 7. First switching valve; 8. Second switching valve; 9. Third switching valve; 10. Fourth switching valve; 11. Pressure balancing pipeline; 12. Cathode-side separation tank; 13. Oxygen delivery pipeline; 14. Oxygen outlet; 15. Cathode level gauge; 16. Anode-side separation tank; 17. Hydrogen delivery pipeline; 18. Hydrogen outlet; 19. Anode level gauge; 20. Second electrolyte circulation pump; 21. Heat exchanger; 22. Heat exchange pipeline; 23. Connecting pipeline. Detailed Implementation

[0033] In view of this, the core of this utility model is to provide an electrolysis water system that can meet the different requirements of the system for electrolyte volume at different operating power levels. This system can not only effectively improve the performance of the electrolyzer 1, but also reduce the energy consumption during system operation.

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Please refer to... Figure 1 .

[0035] The water electrolysis system disclosed in this embodiment includes an electrolytic cell 1, a gas-liquid separation device, and an electrolyte conditioning device. The electrolytic cell 1 is used to generate hydrogen and oxygen. The gas-liquid separation device is connected to the electrolytic cell 1 and can receive hydrogen and oxygen flowing out of the electrolytic cell 1 and separate them. The electrolyte conditioning device is connected to the gas-liquid separation device, and the electrolyte in the electrolyte conditioning device and the electrolyte in the gas-liquid separation device can complement each other.

[0036] When the water electrolysis system is started, the electrolyte in the gas-liquid separator can be replenished into the electrolyte regulating device to reduce the amount of electrolyte in the gas-liquid separator. At this time, heating the electrolysis cell 1 can make the electrolyte in the gas-liquid separator heat up quickly.

[0037] When the temperature of the electrolyte in the gas-liquid separator rises to the target temperature, the temperature will continue to rise. At this time, the electrolyte in the electrolyte regulating device is replenished into the gas-liquid separator. Since the temperature of the electrolyte in the electrolyte regulating device is low, it can appropriately prevent the temperature of the electrolyte in the gas-liquid separator from continuing to rise.

[0038] Compared with the prior art, the water electrolysis system disclosed in this embodiment of the present invention, through the setting of the electrolyte adjustment device, can meet the different requirements of the entire water electrolysis system for the amount of electrolyte at different operating power ranges. This not only effectively improves the performance of the electrolyzer 1, but also reduces the energy consumption during the operation of the water electrolysis system.

[0039] This utility model does not limit the specific structure of the electrolyte adjustment device. Any structure that meets the requirements of this utility model is within the protection scope of this utility model.

[0040] As one embodiment, the electrolyte regulating device disclosed in this utility model includes an electrolyte storage tank 2, a first electrolyte circulation pump 3, and an electrolyte replenishment pipeline. The two ends of the electrolyte replenishment pipeline are respectively connected to the electrolyte storage tank 2 and the gas-liquid separation device, and the first electrolyte circulation pump 3 is disposed on the electrolyte replenishment pipeline.

[0041] As a further embodiment, the electrolyte replenishment pipeline disclosed in this utility model embodiment includes a main pipeline 4, a first branch pipeline 5 and a second branch pipeline 6, a first electrolyte circulation pump 3 is disposed on the main pipeline 4, and a first switching valve 7 and a second switching valve 8 are respectively disposed on both sides of the first electrolyte circulation pump 3.

[0042] One end of the first branch pipe 5 is located between the electrolyte storage tank 2 and the first switch valve 7, and the other end is located between the second switch valve 8 and the first electrolyte circulation pump 3. A third switch valve 9 is also installed on the first branch pipe 5.

[0043] One end of the second branch pipe 6 is located between the first switch valve 7 and the first electrolyte circulation pump 3, and the other end is located between the gas-liquid separation device and the second switch valve 8. A fourth switch valve 10 is also installed on the second branch pipe 6.

[0044] When the water electrolysis system is started, the first electrolyte circulation pump 3 is turned on, the third switch valve 9 and the fourth switch valve 10 are opened, and the first switch valve 7 and the second switch valve 8 are closed. At this time, the electrolyte in the gas-liquid separator flows into the electrolyte storage tank 2 under the action of the first electrolyte circulation pump 3. When the liquid level of the electrolyte in the gas-liquid separator reaches the preset height, the first electrolyte circulation pump 3 is turned off, and the third switch valve 9 and the fourth switch valve 10 are closed at the same time.

[0045] When the water electrolysis system is started, the first electrolyte circulation pump 3 causes the electrolyte to circulate between the gas-liquid separation device and the electrolysis cell 1. Since the electrolysis process in the electrolysis cell 1 generates heat, the temperature of the electrolyte rises rapidly, thereby rapidly improving the performance of the electrolysis cell 1.

[0046] When the water electrolysis system reaches the target temperature, the temperature will continue to rise. At this time, the first switch valve 7 and the second switch valve 8 need to be opened, and the third switch valve 9 and the fourth switch valve 10 need to be closed, so that the electrolyte in the electrolyte storage tank 2 flows into the gas-liquid separator. Since the electrolyte in the electrolyte storage tank 2 is at a lower temperature, it can appropriately prevent the temperature of the electrolyte in the gas-liquid separator from rising.

[0047] After all the electrolyte in the electrolyte storage tank 2 has flowed into the gas-liquid separation device, the first electrolyte circulation pump 3 is turned off, and the first switch valve 7 and the second switch valve 8 are also turned off.

[0048] In order to enable the electrolyte to flow and replenish each other between the electrolyte storage tank 2 and the gas-liquid separation device, a pressure balancing pipeline 11 is also provided between the electrolyte storage tank 2 and the gas-liquid separation device disclosed in this embodiment of the present invention. Under the action of the pressure balancing pipeline 11, the electrolyte storage tank 2 and the gas-liquid separation device can smoothly achieve mutual replenishment of electrolyte.

[0049] This utility model does not limit the specific structure of the gas-liquid separation device. Any structure that meets the requirements of this utility model is within the protection scope of this utility model.

[0050] As one embodiment, the gas-liquid separation device disclosed in this utility model includes a cathode-side separation mechanism, an anode-side separation mechanism, and a heat exchange mechanism, wherein the cathode-side separation mechanism, the anode-side separation mechanism, and the heat exchange mechanism are all connected to the electrolytic cell 1. With this configuration, the electrolytes of the cathode-side separation mechanism and the anode-side separation mechanism can exchange heat with the electrolytic cell 1 through the heat exchange mechanism.

[0051] This utility model embodiment does not limit the specific structure of the cathode-side separation mechanism. Any structure that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0052] As one embodiment, the cathode-side separation mechanism disclosed in this utility model embodiment includes a cathode-side separation tank 12 and an oxygen delivery pipeline 13, wherein one end of the oxygen delivery pipeline 13 is connected to the cathode-side separation tank 12 and the other end is connected to the electrolytic cell 1.

[0053] The cathode-side separator 12 is also equipped with an oxygen outlet 14. The oxygen produced by the electrolytic cell 1 enters the cathode-side separator 12 through the oxygen delivery pipeline 13, and gas-liquid separation is achieved through the cathode-side separator 12. The oxygen is discharged from the oxygen outlet 14.

[0054] As a further embodiment, the cathode-side separation mechanism disclosed in this utility model embodiment also includes a cathode level gauge 15, wherein the cathode level gauge 15 is used to detect the liquid level height of the electrolyte in the cathode-side separation tank 12. This configuration allows for accurate acquisition of the actual liquid level height in the cathode-side separation tank 12, facilitating further specific control.

[0055] This utility model embodiment does not limit the specific structure of the anode-side separation mechanism. Any structure that meets the usage requirements of this utility model is within the protection scope of this utility model.

[0056] As one embodiment, the anode-side separation mechanism disclosed in this utility model includes an anode-side separation tank 16 and a hydrogen delivery pipeline 17, wherein one end of the hydrogen delivery pipeline 17 is connected to the anode-side separation tank 16 and the other end is connected to the electrolytic cell 1.

[0057] The anode-side separator 16 is also equipped with a hydrogen outlet 18. The hydrogen produced by the electrolyzer 1 enters the anode-side separator 16 through the hydrogen delivery pipeline 17, and gas-liquid separation is achieved through the anode-side separator 16. The hydrogen is then discharged from the hydrogen outlet 18.

[0058] As a further embodiment, the anode-side separation mechanism disclosed in this utility model embodiment also includes an anode level gauge 19, wherein the anode level gauge 19 is used to detect the liquid level height of the electrolyte in the anode-side separation tank 16. This configuration allows for accurate acquisition of the actual liquid level height within the anode level gauge 19, facilitating further specific control.

[0059] This utility model does not limit the specific structure of the heat exchange mechanism. Any structure that meets the requirements of this utility model is within the protection scope of this utility model.

[0060] As one embodiment, the heat exchange mechanism disclosed in this utility model embodiment includes a heat exchanger 21, a heat exchange pipeline 22, and a connecting pipeline 23.

[0061] The connecting pipe 23 includes a first opening, a second opening and a third opening. The first opening is connected to one end of the heat exchanger 21, the second opening is connected to the anode-side separation tank 16, and the third opening is connected to the cathode-side separation tank 12.

[0062] One end of the heat exchange pipeline 22 is connected to the electrolytic cell 1, and the other end is connected to the heat exchanger 21. A second electrolyte circulation pump 20 is also installed on the heat exchange pipeline 22.

[0063] In this process, the electrolyte in the electrolytic cell 1 exchanges heat with the cathode-side separation tank 12 and the anode-side separation tank 16 through the heat exchanger 21. As the water electrolysis system continues to operate, the temperature in the cathode-side separation tank 12 and the anode-side separation tank 16 will continue to rise. At this time, the heat exchanger 21 can be used to dissipate heat and reduce the temperature of the electrolyte in the cathode-side separation tank 12 and the anode-side separation tank 16, so that the temperature of the electrolyte in the cathode-side separation tank 12 and the anode-side separation tank 16 reaches a suitable temperature.

[0064] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water electrolysis system, characterized in that, include: An electrolytic cell is used to produce hydrogen and oxygen. A gas-liquid separation device is connected to the electrolytic cell, receives the hydrogen and oxygen flowing out of the electrolytic cell, and separates the hydrogen and oxygen from the gas-liquid separation device; An electrolyte conditioning device is connected to the gas-liquid separation device, and the electrolyte in the electrolyte conditioning device and the electrolyte in the gas-liquid separation device can complement each other.

2. The water electrolysis system according to claim 1, characterized in that, The electrolyte regulating device includes an electrolyte storage tank, a first electrolyte circulation pump, and an electrolyte replenishment pipeline. The two ends of the electrolyte replenishment pipeline are respectively connected to the electrolyte storage tank and the gas-liquid separation device. The first electrolyte circulation pump is installed on the electrolyte replenishment pipeline.

3. The water electrolysis system according to claim 2, characterized in that, The electrolyte replenishment pipeline includes a main pipeline, a first branch pipeline and a second branch pipeline. The first electrolyte circulation pump is installed on the main pipeline, and a first switch valve and a second switch valve are respectively installed on both sides of the first electrolyte circulation pump. One end of the first branch pipeline is located between the electrolyte storage tank and the first switch valve, and the other end is located between the second switch valve and the first electrolyte circulation pump. A third switch valve is also provided on the first branch pipeline. One end of the second branch pipeline is located between the first switch valve and the first electrolyte circulation pump, and the other end is located between the gas-liquid separation device and the second switch valve. A fourth switch valve is also provided on the second branch pipeline.

4. The water electrolysis system according to claim 2, characterized in that, A pressure balancing pipeline is also provided between the electrolyte storage tank and the gas-liquid separation device.

5. The water electrolysis system according to claim 1, characterized in that, The gas-liquid separation device includes a cathode-side separation mechanism, an anode-side separation mechanism, and a heat exchange mechanism, all of which are connected to the electrolytic cell.

6. The water electrolysis system according to claim 5, characterized in that, The cathode-side separation mechanism includes a cathode-side separation tank and an oxygen delivery pipeline. One end of the oxygen delivery pipeline is connected to the cathode-side separation tank, and the other end is connected to the electrolytic cell. The cathode-side separator is also equipped with an oxygen outlet.

7. The water electrolysis system according to claim 6, characterized in that, The anode-side separation mechanism also includes a cathode level gauge, which is used to detect the electrolyte level in the cathode-side separation tank.

8. The water electrolysis system according to claim 6, characterized in that, The anode-side separation mechanism includes an anode-side separation tank and a hydrogen delivery pipeline. One end of the hydrogen delivery pipeline is connected to the anode-side separation tank, and the other end is connected to the electrolytic cell. The anode-side separator is also equipped with a hydrogen gas outlet.

9. The water electrolysis system according to claim 8, characterized in that, The anode-side separation mechanism also includes an anode level gauge, which is used to detect the electrolyte level in the anode-side separation tank.

10. The water electrolysis system according to claim 8, characterized in that, The heat exchange mechanism includes a heat exchanger, heat exchange pipelines, and connecting pipelines; The connecting pipeline includes a first opening, a second opening and a third opening. The first opening is connected to one end of the heat exchanger, the second opening is connected to the anode-side separation tank, and the third opening is connected to the cathode-side separation tank. One end of the heat exchange pipeline is connected to the electrolytic cell, and the other end is connected to the heat exchanger. A second electrolyte circulation pump is also provided on the heat exchange pipeline.

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