Hydrogen production water quality management system

Abstract

The invention discloses a hydrogen production water quality management system, which comprises an electrolytic bath device, a water storage device, a hydrogen separation device, an oxygen separation device and a water quality filtering device, and the hydrogen separation device and the oxygen separation device are respectively communicated with a hydrogen electrolysis outlet and an oxygen electrolysis outlet of the electrolytic bath device. A first water return main path of the oxygen separation device guides separated water to a water inlet of the electrolytic bath device, the first water return main path is provided with a first conductivity sensor and is in bypass connection with a water return bypass, and the water return bypass or the first water return main path located between the water return bypass and the electrolytic bath device is provided with a first valve. The first valve is in communication connection with the first conductivity sensor, and the water quality filtering device is connected with the water return bypass and a water supplementing pipeline of the water storage device in a converging mode and can guide filtered water to the first water return main path, so that water entering the system from the water storage device and circulating water from the first water return main path can be filtered at the same time. The electric conductivity fluctuation is avoided by reducing the electric conductivity in the water path of the system.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production by electrolyzing water, and particularly relates to a hydrogen production water quality management system. Background Art

[0002] Hydrogen production by electrolyzing water is a chemical process that converts electrical energy into hydrogen energy. This process does not produce greenhouse gases or other pollutants, is environmentally friendly, and as a clean fuel, hydrogen only produces water after combustion and does not cause air pollution. Existing methods of hydrogen production by electrolyzing water include: ALK alkaline electrolytic water hydrogen production, PEM electrolytic water hydrogen production, AEM anion exchange membrane electrolytic water hydrogen production, and SOEC solid oxide electrolytic water hydrogen production. Among them, the most ideal hydrogen production method is PEM electrolytic water hydrogen production, and its advantages are mainly reflected in high current density, fast startup speed, low maintenance cost, fast adjustment rate, wide adjustment range, and long service life, which is suitable for the fluctuation regulation of wind-solar power generation.

[0003] However, the existing PEM electrolytic cells have high requirements for water quality, and the quality of water directly affects the performance and service life of the electrolytic cells. If the existing electrolyzed water enters the hydrogen production system without filtration, it will cause fluctuations in the conductivity in the system water circuit, and in severe cases, it will even cause pollution to the electrolytic cells due to excessive conductivity. Summary of the Invention

[0004] In view of the above defects or deficiencies, the present invention provides a hydrogen production water quality management system, aiming to solve the technical problem of fluctuations in the conductivity in the system water circuit caused by unfiltered electrolyzed water entering the hydrogen production system.

[0005] To achieve the above object, the present invention provides a hydrogen production water quality management system, wherein the hydrogen production water quality management system includes an electrolytic cell device, a water storage device, a hydrogen separation device, an oxygen separation device, and a water quality filtration device; the water storage device is provided with a water replenishing pipeline; the hydrogen separation device is communicated with the hydrogen electrolysis outlet of the electrolytic cell device; the oxygen separation device is communicated with the oxygen electrolysis outlet of the electrolytic cell device and circulates the separated water to the water inlet of the electrolytic cell device through a first main return water path. A first conductivity sensor is provided on the first main return water path and a return water bypass is branched. A first valve is provided on the return water bypass or on the first main return water path between the return water bypass and the electrolytic cell device. The first valve is communicatively connected with the first conductivity sensor to be controlled according to the detection data of the first conductivity sensor; the filtration inlet of the water quality filtration device converges the water replenishing pipeline and the return water bypass, and the filtration outlet of the water quality filtration device can direct the filtered water to the first main return water path.

[0006] In an embodiment of the present invention, the oxygen separation device has a first separation inlet and a second separation inlet. The first separation inlet is communicated with the oxygen electrolysis outlet, and the second separation inlet is communicated with the filtration outlet, so that the filtered water can be directed to the first main return water path through the oxygen separation device.

[0007] In an embodiment of the present invention, the first conductivity sensor is located on the first main return water path between the return water bypass and the electrolytic cell device, the first valve is provided on the return water bypass, and the hydrogen production water quality management system further includes a control device. The control device is respectively communicatively connected to the first conductivity sensor and the first valve, and is configured to: control the first valve according to the detection data of the first conductivity sensor.

[0008] In an embodiment of the present invention, controlling the first valve according to the detection data of the first conductivity sensor includes:

[0009] When the detection data belongs to a preset threshold interval, controlling the opening of the first valve according to a preset opening calculation formula, where the preset opening calculation formula is:

[0010]

[0011] In the formula, R represents the opening of the first valve, Q represents the detection data of the first conductivity sensor, X represents the minimum threshold of the preset threshold interval, Y represents the maximum threshold of the preset threshold interval, and a% represents the minimum opening of the system-calibrated first valve.

[0012] In an embodiment of the present invention, a second conductivity sensor is provided on the water storage device, a water replenishing pump is provided on the water replenishing pipeline, the control device is respectively communicatively connected to the second conductivity sensor and the water replenishing pump, and is configured to: control the water replenishing pump to replenish water when the liquid level of the oxygen separation device is lower than the preset liquid level and the detection data of the second conductivity sensor meets the preset water replenishing condition.

[0013] In an embodiment of the present invention, the hydrogen production water quality management system further includes an alarm device communicatively connected to the control device. The control device is configured to: control the alarm device to give an alarm when the detection data of the second conductivity sensor is greater than or equal to the alarm threshold.

[0014] In an embodiment of the present invention, a second main return water path is provided at the first separation water outlet of the hydrogen separation device, and the second main return water path branches into a first return water branch and a second return water branch. The first return water branch is arranged to drain water outward, the second return water branch is communicated with the bottom of the water storage device, and a second valve and a third valve are respectively provided on the first return water branch and the second return water branch in a one-to-one correspondence. The control device is respectively communicatively connected to the second valve and the third valve, and is configured to:

[0015] When the detection data of the second conductivity sensor meets the preset return water condition, controlling to close the second valve and open the third valve;

[0016] When the detection data of the second conductivity sensor does not meet the preset return water condition, control to close the third valve and open the second valve.

[0017] In an embodiment of the present invention, a drain pipe is connected between the first return water branch and the second return water branch, and a fourth valve is provided on the drain pipe.

[0018] In an embodiment of the present invention, the hydrogen separation device includes a hydrogen separator and a hydrogen releaser. The separation inlet of the hydrogen separator is communicated with the hydrogen electrolysis outlet, the second separation water outlet of the hydrogen separator is communicated with the release inlet of the hydrogen releaser, and the hydrogen releaser is provided with a first separation water outlet and can separate and evacuate the hydrogen dissolved in water.

[0019] In an embodiment of the present invention, a circulation pump and a cooling heat exchanger are provided on the pipeline of the first return water main path between the oxygen separation device and the return water bypass.

[0020] In an embodiment of the present invention, the water quality filtration device is set as a resin filter.

[0021] In an embodiment of the present invention, the make-up water pipeline and the return water bypass are respectively provided with a first one-way valve and a second one-way valve in one-to-one correspondence.

[0022] Through the above technical solutions, the hydrogen production water quality management system provided by the present invention has the following beneficial effects:

[0023] When using the above hydrogen production water quality management system, through the addition of the first conductivity sensor and the first valve, when the conductivity index of the circulating water on the first return water main path detected by the first conductivity sensor is qualified, control the circulating water on the first return water main path to enter the electrolytic cell device, and when the conductivity index of the circulating water on the first return water main path detected by the first conductivity sensor is unqualified, control a part of the circulating water on the first return water main path to enter the water quality filtration device from the return water bypass, that is, the proportion of the linkage bypass shunt can be adjusted according to the detection result of the water quality by the first conductivity sensor. In addition, through the addition of the water quality filtration device, and using the filtration inlet of the water quality filtration device to converge the make-up water pipeline of the water storage device and the return water bypass bypassed on the first return water main path, the filtration outlet of the water quality filtration device can direct the filtered water to the first return water main path, so that the water quality filtration device can not only filter the electrolytic water entering the system from the water storage device, but also filter the circulating water from the first return water main path, so as to avoid the occurrence of conductivity fluctuations by reducing the conductivity in the system water circuit, and further avoid the phenomenon of pollution of the electrolytic cell device.

[0024] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation part. Brief Description of the Drawings

[0025] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation to the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings. In the drawings:

[0026] Figure 1 is a schematic structural diagram of a hydrogen production water quality management system according to an embodiment of the present invention;

[0027] Figure 2 is a partial schematic structural diagram of a hydrogen production water quality management system according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 100 electrolytic cell device 200 water storage device

[0030] 210 make-up water pipeline 211 make-up water pump

[0031] 212 first check valve 220 second conductivity sensor

[0032] 230 inlet water pipeline 231 fifth valve

[0033] 300 hydrogen separation device 310 hydrogen separator

[0034] 320 hydrogen release device 330 second main return water path

[0035] 331 first return water branch 332 second return water branch

[0036] 333 second valve 334 third valve

[0037] 340 drainage pipeline 341 fourth valve

[0038] 350 sixth valve 400 oxygen separation device

[0039] 410 first main return water path 411 circulation pump

[0040] 412 water-cooled heat exchanger 413 first conductivity sensor

[0041] 420 return water bypass 421 first valve

[0042] 422 second check valve 500 water quality filtration device Specific embodiments

[0043] The following is a detailed description of specific embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustrative and explanatory purposes of the present invention, and are not intended to limit the present invention.

[0044] The hydrogen production water quality management system of the present invention will be described below with reference to the accompanying drawings.

[0045] As Figure 1 and Figure 2 shown, the present invention provides a hydrogen production water quality management system, wherein the hydrogen production water quality management system includes:

[0046] An electrolytic cell device 100;

[0047] A water storage device 200 provided with a makeup water pipeline 210;

[0048] A hydrogen separation device 300 communicated with the hydrogen electrolysis outlet of the electrolytic cell device 100;

[0049] An oxygen separation device 400 communicated with the oxygen electrolysis outlet of the electrolytic cell device 100, and circulating the separated water to the water inlet of the electrolytic cell device 100 through a first main return water path 410. A first conductivity sensor 413 is provided on the first main return water path 410, and a return water bypass 420 is connected in parallel. A first valve 421 is provided on the return water bypass 420 or on the first main return water path 410 between the return water bypass 420 and the electrolytic cell device 100. The first valve 421 is communicatively connected with the first conductivity sensor 413 to be controlled according to the detection data of the first conductivity sensor 413;

[0050] A water quality filtration device 500, the filtration inlet of the water quality filtration device 500 converges the makeup water pipeline 210 and the return water bypass 420, and the filtration outlet of the water quality filtration device 500 can direct the filtered water to the first main return water path 410.

[0051] When using the above hydrogen production water quality management system, by adding the first conductivity sensor 413 and the first valve 421, when the conductivity index of the circulating water on the first return water main path 410 detected by the first conductivity sensor 413 is qualified, the circulating water on the first return water main path 410 can be controlled to enter the electrolyzer device 100, and when the conductivity index of the circulating water on the first return water main path 410 detected by the first conductivity sensor 413 is unqualified, a part of the circulating water on the first return water main path 410 can be controlled to enter the water quality filtration device 500 from the return water bypass 420, that is, the proportion of the linkage bypass shunt can be adjusted according to the detection result of the water quality by the first conductivity sensor 413. In addition, by adding the water quality filtration device 500, and connecting the filtration inlet of the water quality filtration device 500 to the water supply pipeline 210 of the water storage device 200 and the return water bypass 420 branched from the first return water main path 410, the filtered water can be directed to the first return water main path 410 at the filtration outlet of the water quality filtration device 500, so that the water quality filtration device 500 can not only filter the electrolysis water entering the system from the water storage device 200, but also filter the circulating water from the first return water main path 410, so as to avoid the occurrence of conductivity fluctuations by reducing the conductivity in the system water circuit, and further avoid the phenomenon of pollution of the electrolyzer device 100.

[0052] It should be particularly noted that the hydrogen production water quality management system provided by the present invention is particularly suitable for PEM electrolytic water hydrogen production, but is not limited thereto. If other electrolytic water hydrogen production methods with high water quality requirements use the hydrogen production water quality management system provided by the present invention, they should fall within the protection scope of the present invention.

[0053] Specifically, the water storage device 200 can store electrolysis water and is also provided with a water inlet pipeline 230. A fifth valve 231 is provided on the water inlet pipeline 230. When the fifth valve 231 is opened, electrolysis water can be supplemented into the water storage device 200 from the water inlet pipeline 230. At the same time, the filtration inlet of the water quality filtration device 500 is connected to the water supply pipeline 210 and the return water bypass 420, that is, the water supply pipeline 210 and the return water bypass 420 are arranged in parallel, and the water in the water supply pipeline 210 and the return water bypass 420 can flow to the water quality filtration device 500.

[0054] In an embodiment of the present invention, the oxygen separation device 400 has a first separation inlet and a second separation inlet. The first separation inlet is communicated with the oxygen electrolysis outlet, and the second separation inlet is communicated with the filtration outlet, so that the filtered water can be guided to the first main return water path 410 through the oxygen separation device 400. That is, the filtered water discharged from the filtration outlet of the water quality filtration device 500 can pass through the oxygen separation device 400 and then be guided to the first main return water path 410, so that the filtered water can be fully mixed with the water entering the oxygen separation device 400 from the electrolysis cell device 100 in the oxygen separation device 400, avoiding fluctuations in the conductivity of the circulating water on the first main return water path 410.

[0055] Specifically, the oxygen separation device 400 also has an oxygen outlet for discharging the separated oxygen, and a liquid level sensor for detecting the liquid level is also provided on the oxygen separation device 400, so as to facilitate the subsequent automatic control of the system water replenishment.

[0056] In an embodiment of the present invention, the first conductivity sensor 413 is located on the first main return water path 410 between the return water bypass 420 and the electrolysis cell device 100. The first valve 421 is provided on the return water bypass 420. The hydrogen production water quality management system further includes a control device, which is respectively communicatively connected to the first conductivity sensor 413 and the first valve 421, and is configured to: control the first valve 421 according to the detection data of the first conductivity sensor 413. That is, by adding the control device, the automatic control of the first valve 421 can be realized. At the same time, by arranging the first conductivity sensor 413 on the first main return water path 410 between the return water bypass 420 and the electrolysis cell device 100, the accuracy of the water quality detection of the water entering the electrolysis cell device 100 can be improved, and by arranging the first valve 421 on the return water bypass 420, the water flow rate of the return water bypass 420 and the water flow rate of the circulating water flowing into the electrolysis cell device 100 can be more accurately controlled, avoiding the phenomenon of frequent shutdown during the operation of the electrolysis cell device 100 due to too high or too low water flow rate.

[0057] Specifically, the detection data of the first conductivity sensor 413 can be used to control the opening and closing of the first valve 421. For example: when the first conductivity sensor 413 detects that the conductivity index is qualified, the first valve 421 is controlled to close, so that all the circulating water on the first main return water path 410 enters the electrolysis cell device 100; when the first conductivity sensor 413 detects that the conductivity index is unqualified, the first valve 421 is controlled to open, so that part of the circulating water on the first main return water path 410 enters the electrolysis cell device 100, and part enters the water quality filtration device 500 through the return water bypass 420 for filtration. Of course, the present invention is not limited to this, and the detection data of the first conductivity sensor 413 can also be used to adjust and control the opening degree of the first valve 421.

[0058] In an embodiment of the present invention, controlling the first valve 421 according to the detection data of the first conductivity sensor 413 includes:

[0059] Collecting conductivity detection data Q;

[0060] If Q < X, the opening degree of the first valve 421 is a%;

[0061] If X ≤ Q ≤ Y, that is, the detection data of the first conductivity sensor 413 belongs to the preset threshold interval, the opening degree of the first valve 421 is controlled according to the preset opening degree calculation formula. The valve control formula is as follows:

[0062]

[0063] If Q > Y, the opening degree of the first valve 421 is 100%.

[0064] In the formula, R represents the opening degree of the first valve 421, Q represents the detection data of the first conductivity sensor 413, X represents the minimum threshold of the preset threshold interval, Y represents the maximum threshold of the preset threshold interval, and a% represents the minimum opening degree of the first valve 421 calibrated by the system.

[0065] By constructing the opening degree calculation formula of the first valve 421 within the preset threshold interval, the opening degree of the first valve 421 can be dynamically adjusted according to the detection data of the first conductivity sensor 413, so that the conductivity of the circulating water entering the electrolytic cell device 100 can be stably maintained below a certain value. Specifically, after the control device receives the detection data of the first conductivity sensor 413, it first compares the current detection data with the detection data of the first conductivity sensor 413 in the previous time. If it is greater than the detection data in the previous time, the preset opening degree calculation formula is called to calculate the opening degree of the first valve 421 and control the first valve 421 to be adjusted according to the calculated opening degree. If it is less than the detection data in the previous time, there is no need to call the preset opening degree calculation formula for calculation and there is no need to adjust the opening degree of the first valve 421. In addition, the minimum opening degree of the first valve 421 calibrated by the system can be calibrated according to the flow ratio of the first main return path 410 shunted to the electrolytic cell device 100 and the water quality filtration device 500. For example, the flow rate shunted to the electrolytic cell device 100 accounts for 90%, while the flow rate of the water quality filtration device 500 accounts for 10%.

[0066] More specifically, controlling the first valve 421 according to the detection data of the first conductivity sensor 413 further includes:

[0067] When the detected data belongs to the minimum threshold of the interval less than the preset threshold, control the opening degree of the first valve 421 to maintain at the minimum opening degree calibrated for the first valve 421 in the system;

[0068] When the detected data belongs to the maximum threshold of the interval greater than the preset threshold, control the opening degree of the first valve 421 to maintain at 100%.

[0069] In an embodiment of the present invention, a second conductivity sensor 220 is provided on the water storage device 200, and a makeup water pump 211 is provided on the makeup water pipeline 210. The control device is respectively communicatively connected to the second conductivity sensor 220 and the makeup water pump 211, and is configured to: when the liquid level of the oxygen separation device 400 is lower than the preset liquid level and the detected data of the second conductivity sensor 220 meets the preset makeup water condition, control the makeup water pump 211 to perform makeup water. By adding the second conductivity sensor 220, the conductivity of the electrolytic water in the water storage device 200 can be detected, and the conductivity of the electrolytic water in the water storage device 200 is used as the start index of the makeup water operation, which can further limit the conductivity of the electrolytic water entering the system waterway in advance. Specifically, the preset makeup water condition can be set as the detected data being less than or equal to the first preset conductivity.

[0070] In an embodiment of the present invention, the hydrogen production water quality management system further includes an alarm device communicatively connected to the control device. The control device is configured to: when the detected data of the second conductivity sensor 220 is greater than or equal to the alarm threshold, control the alarm device to give an alarm. By adding the alarm device, when the conductivity of the electrolytic water in the water storage device 200 seriously exceeds the standard, an alarm prompt can be issued so that the operator can handle it. The specific handling can be: the system shuts down, and after shutdown, the electrolytic water in the water storage device 200 is emptied, and then new electrolytic water is replenished into the water storage device 200. It should be particularly noted that the alarm threshold can be set to be greater than the first preset conductivity.

[0071] In an embodiment of the present invention, a second main return water path 330 is provided at the first separation water outlet of the hydrogen separation device 300, and the second main return water path 330 branches into a first return water branch 331 and a second return water branch 332. The first return water branch 331 can be arranged to drain water outwards, and the second return water branch 332 is communicated with the bottom of the water storage device 200. Second valves 333 and third valves 334 are respectively provided on the first return water branch 331 and the second return water branch 332. The control device is respectively communicatively connected to the second valves 333 and the third valves 334, and is configured to:

[0072] When the detected data of the second conductivity sensor 220 meets the preset return water condition, control to close the second valve 333 and open the third valve 334;

[0073] When the detection data of the second conductivity sensor 220 does not meet the preset return water condition, control to close the third valve 334 and open the second valve 333.

[0074] Understandably, when the detection data of the second conductivity sensor 220 meets the preset return water condition, the water separated by the hydrogen separation device 300 can sequentially circulate into the water storage device 200 via the second main return water path 330 and the second return water branch 332, so as to further improve the utilization rate on the basis of ensuring that the conductivity of the circulating water is qualified. In addition, when the detection data of the second conductivity sensor 220 does not meet the preset return water condition, the water separated by the hydrogen separation device 300 can be discharged to the outside of the system via the second main return water path 330 and the first return water branch 331, so as to ensure that the circulating water with unqualified conductivity does not enter the system. Specifically, the preset return water condition can be set to the detection data being less than or equal to the second preset conductivity, and the second preset conductivity can be equal to or not equal to the first preset conductivity.

[0075] More specifically, both the second return water branch 332 and the water inlet pipe 230 are connected to the bottom of the water storage device 200, the water replenishing pipe 210 is connected to the side of the water storage device 200, and the second conductivity sensor 220 is arranged close to the bottom of the water storage device 200.

[0076] In an embodiment of the present invention, a drain pipe 340 is connected between the first return water branch 331 and the second return water branch 332, and a fourth valve 341 is provided on the drain pipe 340. The addition of the drain pipe 340 and the fourth valve 341 enables the water storage device 200 and the first return water branch 331 to share a drain port, facilitating the collection of unqualified water. Further, when the alarm device alarms, the fourth valve 341 can be controlled to open to drain the electrolytic water in the water storage device 200. It should be particularly noted that when the alarm device does not alarm and the system operates normally, the fourth valve 341 remains closed.

[0077] In an embodiment of the present invention, the hydrogen separation device 300 includes a hydrogen separator 310 and a hydrogen releaser 320. The separation inlet of the hydrogen separator 310 is communicated with the hydrogen electrolysis outlet, the second separation water outlet of the hydrogen separator 310 is communicated with the release inlet of the hydrogen releaser 320, and the hydrogen releaser 320 is provided with a first separation water outlet and can separate and evacuate the hydrogen dissolved in water. That is, by adding the hydrogen releaser 320, the hydrogen dissolved in water can be separated from the water again to ensure that the water circulating into the water storage device 200 does not contain hydrogen. Specifically, the hydrogen releaser 320 is configured to separate a small amount of hydrogen dissolved in water by means of pressure reduction. The hydrogen separator 310 also has a first hydrogen outlet for discharging the separated hydrogen, and the hydrogen releaser 320 also has a second hydrogen outlet for discharging the separated hydrogen. A sixth valve 350 is also provided between the second separation water outlet of the hydrogen separator 310 and the release inlet of the hydrogen releaser 320.

[0078] In an embodiment of the present invention, the first return water main path 410 is provided with a circulation pump 411 and a cooling heat exchanger 412 on the pipeline between the oxygen separation device 400 and the return water bypass 420. The addition of the circulation pump 411 can accelerate the water circulation and mixing, and the cooling heat exchanger 412 can cool the water flowing through the oxygen separation device 400.

[0079] In an embodiment of the present invention, the water quality filtering device 500 can be configured as a resin filter. The resin filter has the advantages of high efficiency, stability and environmental protection. Of course, the present invention is not limited to this, and other suitable filters are also possible.

[0080] In an embodiment of the present invention, the make-up water pipeline 210 and the return water bypass 420 are respectively provided with a first one-way valve 212 and a second one-way valve 422. The first one-way valve 212 can make the water liquid flow only from the make-up water pipeline 210 towards the water quality filtering device 500, and the second one-way valve 422 can make the water liquid flow only from the return water bypass 420 towards the water quality filtering device 500.

[0081] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0082] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0084] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A hydrogen production water quality management system, characterized in that, The hydrogen production water quality management system includes: An electrolyzer device (100); A water storage device (200) provided with a make-up water pipeline (210); A hydrogen separation device (300) communicated with the hydrogen electrolysis outlet of the electrolyzer device (100); An oxygen separation device (400) communicated with the oxygen electrolysis outlet of the electrolyzer device (100), and circulating the separated water to the water inlet of the electrolyzer device (100) through a first main return water path (410). A first conductivity sensor (413) is provided on the first main return water path (410), and a return water bypass (420) is connected in parallel thereto. A first valve (421) is provided on the return water bypass (420) or on the first main return water path (410) between the return water bypass (420) and the electrolyzer device (100). The first valve (421) is communicatively connected with the first conductivity sensor (413) to be controlled according to the detection data of the first conductivity sensor (413); A water quality filtration device (500), the filtration inlet of the water quality filtration device (500) converges the make-up water pipeline (210) and the return water bypass (420), and the filtration outlet of the water quality filtration device (500) can direct the filtered water to the first main return water path (410).

2. The hydrogen production water quality management system according to claim 1, characterized in that The oxygen separation device (400) has a first separation inlet and a second separation inlet. The first separation inlet is communicated with the oxygen electrolysis outlet, and the second separation inlet is communicated with the filtration outlet, so that the filtered water can be directed to the first main return water path (410) through the oxygen separation device (400).

3. The hydrogen production water quality management system according to claim 1, characterized in that, The first conductivity sensor (413) is located on the first main return water path (410) between the return water bypass (420) and the electrolyzer device (100), and the first valve (421) is provided on the return water bypass (420). The hydrogen production water quality management system further includes a control device, and the control device is communicatively connected with the first conductivity sensor (413) and the first valve (421) respectively, and is configured to: control the first valve (421) according to the detection data of the first conductivity sensor (413).

4. The hydrogen production water quality management system according to claim 3, characterized in that, The control of the first valve (421) according to the detection data of the first conductivity sensor (413) includes: When the detection data belongs to a preset threshold range, controlling the opening of the first valve (421) according to a preset opening calculation formula, where the preset opening calculation formula is: In the formula, R represents the opening of the first valve (421), Q represents the detection data of the first conductivity sensor (413), X represents the minimum threshold of the preset threshold range, Y represents the maximum threshold of the preset threshold range, and a% represents the minimum opening of the system-calibrated first valve (421).

5. The hydrogen production water quality management system according to claim 3, characterized in that, A second conductivity sensor (220) is provided on the water storage device (200), a water replenishing pump (211) is provided on the water replenishing pipeline (210), and the control device is communicatively connected to the second conductivity sensor (220) and the water replenishing pump (211) respectively, and is configured to: control the water replenishing pump (211) to replenish water when the liquid level of the oxygen separation device (400) is lower than a preset liquid level and the detection data of the second conductivity sensor (220) meets the preset water replenishing condition).

6. The hydrogen production water quality management system according to claim 5, characterized in that The hydrogen production water quality management system further includes an alarm device communicatively connected to the control device, and the control device is configured to: control the alarm device to give an alarm when the detection data of the second conductivity sensor (220) is greater than or equal to an alarm threshold).

7. The hydrogen production water quality management system according to claim 5, characterized in that, A second main return water path (330) is provided at the first separation water outlet of the hydrogen separation device (300), and the second main return water path (330) branches into a first return water branch (331) and a second return water branch (332). The first return water branch (331) is arranged to drain water outwards, the second return water branch (332) is communicated with the bottom of the water storage device (200), and second valves (333) and third valves (334) are respectively provided on the first return water branch (331) and the second return water branch (332) in a one-to-one correspondence. The control device is communicatively connected to the second valve (333) and the third valve (334) respectively, and is configured to: control to close the second valve (333) and open the third valve (334) when the detection data of the second conductivity sensor (220) meets the preset return water condition; control to close the third valve (334) and open the second valve (333) when the detection data of the second conductivity sensor (220) does not meet the preset return water condition).

8. The hydrogen production water quality management system according to claim 7, wherein, A drain pipeline (340) is connected between the first return water branch (331) and the second return water branch (332), and a fourth valve (341) is provided on the drain pipeline (340).

9. The hydrogen production water quality management system according to claim 7, characterized in that, The hydrogen separation device (300) includes a hydrogen separator (310) and a hydrogen releaser (320). The separation inlet of the hydrogen separator (310) is communicated with the hydrogen electrolysis outlet, the second separation water outlet of the hydrogen separator (310) is communicated with the release inlet of the hydrogen releaser (320), and the first separation water outlet is provided on the hydrogen releaser (320) and can separate and empty the hydrogen dissolved in water).

10. The hydrogen production water quality management system according to any one of claims 1 to 9, characterized in that, A circulation pump (411) and a cooling heat exchanger (412) are provided on the pipeline of the first main return water path (410) between the oxygen separation device (400) and the return water bypass (420); and / or, the water quality filtration device (500) is set as a resin filter; and / or, a first one-way valve (212) and a second one-way valve (422) are respectively provided on the water replenishing pipeline (210) and the return water bypass (420) in a one-to-one correspondence).

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