Multi-alkaline electrolysis water hydrogen production monitoring system and monitoring method

Abstract

The invention discloses a pair of multi-alkaline electrolytic water hydrogen production monitoring systems which comprises a plurality of alkaline liquid circulating pumps, each alkaline liquid circulating pump is connected with an alkaline electrolytic bath through a pipeline, the cathode end of each alkaline electrolytic bath is jointly connected with an oxygen-in-hydrogen analysis assembly, and the anode end of each alkaline electrolytic bath is jointly connected with an oxygen-in-hydrogen analysis assembly. A monitoring assembly is connected between each alkaline electrolytic cell and the oxygen-in-hydrogen analysis assembly through a pipeline, each monitoring assembly is connected with the oxygen-in-hydrogen analysis assembly, all the alkaline liquor circulating pumps are jointly connected with an alkaline liquor cooler, and the alkaline liquor cooler is connected with the oxygen-in-hydrogen analysis assembly and the oxygen-in-hydrogen analysis assembly. And each monitoring assembly is in data connection with a controller. The invention further discloses a multi-alkaline water electrolysis hydrogen production monitoring method. According to the one-to-many alkaline electrolytic water hydrogen production monitoring system and monitoring method, the problem that the hydrogen content in oxygen of each electrolytic cell cannot be monitored is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production equipment, and in particular relates to a one-to-many alkaline water electrolysis hydrogen production monitoring system, and also relates to a one-to-many alkaline water electrolysis hydrogen production monitoring method. Background Art

[0002] Hydrogen energy is a secondary energy source that is abundant in source, green, low-carbon, and widely used. It is gradually becoming one of the important carriers of global energy transformation and development. The market for alkaline water electrolysis hydrogen production technology is highly mature and can achieve large-scale, low-cost water electrolysis hydrogen production technology. The gas-liquid separation device is a key equipment in the alkaline water electrolysis hydrogen production system. During the hydrogen production process of the alkaline water electrolyzer, the cathode of the electrolyzer produces a mixture of hydrogen, electrolyte, and water, and the anode produces a mixture of oxygen, electrolyte, and water. In the actual operation of the hydrogen production system, in order to obtain higher-purity hydrogen / oxygen, the mixture produced by the anode and cathode needs to be separated by a gas-liquid separation device.

[0003] At present, one large-scale electrolyzer corresponds to one gas-liquid separation device for hydrogen production, which has high construction cost, large floor space, many transportation units, high transportation costs, difficult disassembly, waste of manpower, and reduced transportation and installation efficiency; while one gas-liquid separation device is used to produce hydrogen for multiple large-scale electrolyzers, which has low construction cost and fewer transportation units. However, one gas-liquid separation device has only one hydrogen-oxygen analyzer and one oxygen-hydrogen analyzer for the hydrogen production system of multiple large-scale electrolyzers. It can only monitor the hydrogen in oxygen and the oxygen in hydrogen of the overall oxygen produced by multiple electrolyzers, but cannot monitor and analyze the gas purity of each electrolyzer. On this basis, hydrogen is extremely flammable, and when the hydrogen content in oxygen of each electrolyzer cannot be analyzed, the unstable hydrogen content in oxygen is prone to safety problems, which poses certain safety risks. Summary of the Invention

[0004] The purpose of the present invention is to provide a one-to-many alkaline water electrolysis hydrogen production monitoring system and monitoring method, which solves the problem that the hydrogen content in oxygen of each electrolytic cell cannot be monitored.

[0005] Another object of the present invention is to provide a one-to-many alkaline water electrolysis hydrogen production monitoring method.

[0006] The technical solution adopted by the present invention is a one-to-many alkaline water electrolysis hydrogen production monitoring system, including several alkali liquid circulation pumps, each alkali liquid circulation pump is connected to an alkaline electrolyzer by a pipeline, a flow meter is provided between each alkali liquid circulation pump and the corresponding alkaline electrolyzer, the cathode end of each alkaline electrolyzer is commonly connected to an oxygen-in-hydrogen analysis component, the anode end of each alkaline electrolyzer is commonly connected to an oxygen-in-hydrogen analysis component, a monitoring component is connected to a pipeline between each alkaline electrolyzer and the hydrogen-in-oxygen analysis component, each monitoring component is connected to the hydrogen-in-oxygen analysis component, each alkali liquid circulation pump is commonly connected to an alkali liquid cooler, the alkali liquid cooler is respectively connected to the oxygen-in-hydrogen analysis component and the hydrogen-in-oxygen analysis component, each monitoring component is data-connected to a controller, and the controller is data-connected to each flow meter.

[0007] The present invention is also characterized in that: The hydrogen-oxygen analysis component includes a hydrogen separator, which is connected to the cathode end of each alkaline electrolyzer through a pipeline, and is connected to the alkali liquid cooler through a pipeline. The hydrogen separator is connected to a hydrogen outlet pipeline, and a hydrogen-oxygen analyzer is installed on the hydrogen outlet pipeline.

[0008] The oxygen-hydrogen analysis component includes an oxygen separator, which is connected to the anode end of each alkaline electrolyzer via a pipeline, the oxygen separator and each alkaline electrolyzer are connected to the monitoring component via a pipeline, the oxygen separator is connected to each monitoring component via a pipeline, the oxygen separator is connected to the alkali liquid cooler via a pipeline, the oxygen separator is connected to the oxygen outlet pipeline, and the first oxygen-hydrogen analyzer is provided on the oxygen outlet pipeline.

[0009] Each monitoring component includes an integrated tower, each integrated tower is connected between the oxygen separator and each alkaline electrolyzer through a pipeline, a regulating valve is provided between the integrated tower and the alkaline electrolyzer, the top of the integrated tower is connected to the oxygen separator through a pipeline, and a check valve and a second oxygen-hydrogen analyzer are provided in sequence between the integrated tower and the oxygen separator.

[0010] The bottom pipeline of the integrated tower is connected to a lye drainer, the other end of the pipeline of the lye drainer is connected to a magnetic pump, the other end of the magnetic pump is connected to the oxygen separator through a pipeline, a first pneumatic ball valve is arranged between the integrated tower and the lye drainer, a second pneumatic ball valve is arranged between the lye drainer and the magnetic pump, and a third pneumatic ball valve and a first check valve are arranged in sequence between the magnetic pump and the oxygen separator.

[0011] Each integrated tower is equipped with a differential pressure transmitter, each alkali liquid drainer is equipped with a liquid level gauge, and each integrated tower and alkali liquid cooler are connected to cooling water through a stainless steel pipeline.

[0012] The controller communicates signals with each regulating valve, each first pneumatic ball valve, each second pneumatic ball valve, each magnetic pump, each third pneumatic ball valve, each differential pressure transmitter, each liquid level meter and each flow meter through data lines or wireless networks.

[0013] Another technical solution of the present invention is a one-to-many alkaline water electrolysis hydrogen production monitoring method, comprising the following steps: S1: The alkali solution circulation pump injects alkali solution into the alkaline electrolytic cell, the cathode of the alkaline electrolytic cell generates hydrogen, and the anode of the alkaline electrolytic cell generates oxygen; S2: monitor the oxygen content in the total hydrogen generated at the cathode of all alkaline electrolytic cells, and monitor the hydrogen content in the total oxygen generated at the anode of all alkaline electrolytic cells; S3: The controller adjusts the opening of the corresponding regulating valve according to the size of the flow meter, injects the oxygen and alkali solution mixture in the anode of the alkaline electrolytic cell into the integrated tower to separate the oxygen and alkali solution mixture; S4: The alkali liquid separated in the integrated tower flows downward and is discharged into the alkali liquid drainer, and the alkali liquid from the alkali liquid drainer is injected into the oxygen separator; S5: The oxygen separated by the integrated tower flows upward into the gas phase of the oxygen separator. A small amount of oxygen passes through the pipeline and enters the second oxygen-hydrogen analyzer. The oxygen-hydrogen analyzer monitors the amount of hydrogen contained in the oxygen produced by a single alkaline electrolyzer.

[0014] The present invention is also characterized in that: The specific steps of S2 are: The hydrogen and alkaline solution at the cathode of the alkaline electrolyzer flow into the hydrogen separator, which separates the hydrogen. The hydrogen then enters the hydrogen outlet pipeline from the top of the separator and is discharged. A small amount of hydrogen passes through the pipeline and enters the hydrogen oxygen analyzer, which monitors the oxygen content in the overall hydrogen produced by several alkaline electrolyzers. The oxygen and alkaline solution at the anode of the alkaline electrolytic cell flow into the oxygen separator, which separates the oxygen. The oxygen enters the oxygen outlet pipeline from the top of the oxygen separator and is discharged. A small amount of oxygen enters the first oxygen-hydrogen analyzer when passing through the pipeline. The first oxygen-hydrogen analyzer monitors the hydrogen content in the overall oxygen produced by several alkaline electrolytic cells.

[0015] The specific steps of S4 are: When the differential pressure transmitter measures that the liquid level of the alkali solution in the integrated tower reaches the high value set by the controller, the controller controls the first pneumatic ball valve to open, and the alkali solution flows from the integrated tower into the alkali solution drainer; When the differential pressure transmitter measures that the liquid level of the alkali solution in the integrated tower reaches the low value set by the controller, the controller controls the first pneumatic ball valve to close, preventing the alkali solution from flowing from the integrated tower into the alkali solution drainer; When the level gauge measures that the liquid level of the alkali liquid in the alkali liquid drainer reaches the high value set by the controller, the controller controls the second pneumatic ball valve and the third pneumatic ball valve to open simultaneously, starts the magnetic pump, and injects the alkali liquid from the alkali liquid drainer into the liquid phase in the oxygen separator; When the level gauge measures that the liquid level of the alkali liquid in the alkali liquid drainer reaches the low value set by the controller, the controller controls the second pneumatic ball valve and the third pneumatic ball valve to close at the same time, turns off the magnetic pump, and prevents the alkali liquid from being injected into the liquid phase in the oxygen separator from the alkali liquid drainer.

[0016] The beneficial effects of the present invention are: The one-to-many alkaline water electrolysis hydrogen production monitoring system and monitoring method provided by the present invention provide a branch line in the pipeline between the anode of each electrolyzer and the oxygen separator. The two-phase mixture of oxygen and alkaline solution enters the integrated tower through the branch line. In the integrated tower, the two-phase mixture of oxygen and alkaline solution is separated and the oxygen is cooled; the oxygen flows upward from the integrated tower into the gas phase of the oxygen separator; an oxygen-hydrogen analyzer is provided in the pipeline between the integrated tower and the oxygen separator to monitor the oxygen-hydrogen content of the anode of each electrolyzer in real time, thereby solving the problem of being unable to monitor the hydrogen content in oxygen of each electrolyzer and ensuring the safety of the hydrogen production process. At the same time, one gas-liquid separation device corresponds to the hydrogen production of multiple electrolyzers, with low cost and fewer transportation units, thus simplifying the hydrogen production process and reducing equipment investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the one-to-many alkaline water electrolysis hydrogen production monitoring system of the present invention.

[0018] As shown in the figure: 1. Alkali liquid circulation pump, 2. Alkaline electrolyzer, 3. Hydrogen separator, 4. Oxygen separator, 5. Oxygen-in-hydrogen analyzer, 6. First oxygen-in-hydrogen analyzer, 7. Control valve, 8. Integrated tower, 9. First pneumatic ball valve, 10. Alkali liquid drainer, 11. Second pneumatic ball valve, 12. Magnetic pump, 13. Third pneumatic ball valve, 14. First check valve, 15. Second check valve, 16. Second oxygen-in-hydrogen analyzer, 17. Differential pressure transmitter, 18. Liquid level gauge, 19. Cooling water, 20. Alkali liquid cooler, 21. Controller, 22. Hydrogen outlet pipeline, 23. Oxygen outlet pipeline, 24. Flow meter. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] The present invention provides a one-to-many alkaline water electrolysis hydrogen production monitoring system, such as Figure 1As shown, it includes several alkali liquid circulation pumps 1, each alkali liquid circulation pump 1 is connected to an alkaline electrolytic cell 2 by a pipeline, a flow meter 24 is provided between each alkali liquid circulation pump 1 and the corresponding alkaline electrolytic cell 2, the cathode end of each alkaline electrolytic cell 2 is commonly connected to an oxygen-in-hydrogen analysis component, the anode end of each alkaline electrolytic cell 2 is commonly connected to an oxygen-in-hydrogen analysis component, a monitoring component is connected to the oxygen-in-hydrogen analysis component by a pipeline between each alkaline electrolytic cell 2 and the hydrogen-in-oxygen analysis component, each monitoring component is connected to the oxygen-in-hydrogen analysis component, each alkali liquid circulation pump 1 is commonly connected to an alkali liquid cooler 20, the alkali liquid cooler 20 is respectively connected to the oxygen-in-hydrogen analysis component and the hydrogen-in-oxygen analysis component, each monitoring component is data-connected to a controller 21, and the controller 21 is data-connected to each flow meter 24.

[0021] The hydrogen-oxygen analysis component includes a hydrogen separator 3, which is connected to the cathode end of each alkaline electrolytic cell 2 through a pipeline. The hydrogen separator 3 is connected to the alkali liquid cooler 20 through a pipeline. The hydrogen separator 3 is connected to a hydrogen outlet pipeline 22, and a hydrogen-oxygen analyzer 5 is provided on the hydrogen outlet pipeline 22.

[0022] The oxygen-hydrogen analysis component includes an oxygen separator 4, which is connected to the anode end of each alkaline electrolyzer 2 via a pipeline. The oxygen separator 4 and each alkaline electrolyzer 2 are connected to the monitoring component via a pipeline. The oxygen separator 4 is connected to each monitoring component via a pipeline. The oxygen separator 4 is connected to the alkali liquid cooler 20 via a pipeline. The oxygen separator 4 is connected to the oxygen outlet pipeline 23, and the first oxygen-hydrogen analyzer 6 is provided on the oxygen outlet pipeline 23.

[0023] The alkali liquid enters the alkali liquid cooler 20 from the hydrogen separator 3 and the oxygen separator 4 to reduce the temperature of the alkali liquid and prevent the temperature from being too high when it enters the alkaline electrolytic cell 2 later; the alkali liquid circulation pump 1 injects the alkali liquid into the corresponding alkaline electrolytic cell 2 to form an alkali liquid circulation system.

[0024] Each monitoring component includes an integrated tower 8, each integrated tower 8 is connected between the oxygen separator 4 and each alkaline electrolyzer 2 through a pipeline, a regulating valve 7 is provided between the integrated tower 8 and the alkaline electrolyzer 2, the top of the integrated tower 8 is connected to the oxygen separator 4 through a pipeline, and a check valve 15 and a second oxygen-hydrogen analyzer 16 are provided in sequence between the integrated tower 8 and the oxygen separator 4.

[0025] The bottom pipeline of the integrated tower 8 is connected to a lye drainer 10, the other end of the pipeline of the lye drainer 10 is connected to a magnetic pump 12, the other end of the magnetic pump 12 is connected to the oxygen separator 4 through a pipeline, a first pneumatic ball valve 9 is arranged between the integrated tower 8 and the lye drainer 10, a second pneumatic ball valve 11 is arranged between the lye drainer 10 and the magnetic pump 12, and a third pneumatic ball valve 13 and a first check valve 14 are arranged in sequence between the magnetic pump 12 and the oxygen separator 4.

[0026] Each integrated tower 8 is provided with a differential pressure transmitter 17, each alkali liquid drainer 10 is provided with a liquid level meter 18, and each integrated tower 8 and alkali liquid cooler 20 are connected to cooling water 19 through a stainless steel pipeline.

[0027] The controller 21 communicates signals with each regulating valve 7, each first pneumatic ball valve 9, each second pneumatic ball valve 11, each magnetic pump 12, each third pneumatic ball valve 13, each differential pressure transmitter 17, each liquid level meter 18 and each flow meter 24 through data lines or wireless networks.

[0028] The one-to-many alkaline water electrolysis hydrogen production monitoring method provided by the present invention comprises the following steps: S1: Alkali solution circulation pump 1 injects alkaline solution into alkaline electrolytic cell 2, the cathode of alkaline electrolytic cell 2 generates hydrogen, and the anode of alkaline electrolytic cell 2 generates oxygen; S2: monitoring the oxygen content in the total hydrogen generated at the cathodes of all alkaline electrolytic cells 2, and monitoring the hydrogen content in the total oxygen generated at the anodes of all alkaline electrolytic cells 2; The specific steps of S2 are: The hydrogen and alkaline solution at the cathode of the alkaline electrolytic cell 2 flow into the hydrogen separator 3, which separates the hydrogen. The hydrogen enters the hydrogen outlet pipeline 22 from the top of the hydrogen separator 3 and is discharged. A small amount of hydrogen passes through the pipeline and enters the hydrogen oxygen analyzer 5. The hydrogen oxygen analyzer 5 monitors the oxygen content in the total hydrogen produced by several alkaline electrolytic cells 2. The oxygen and alkaline solution at the anode of the alkaline electrolytic cell 2 flow into the oxygen separator 4, which separates the oxygen. The oxygen enters the oxygen outlet pipeline 23 from the top of the oxygen separator 4 and is discharged. A small amount of oxygen enters the first oxygen-hydrogen analyzer 6 when passing through the pipeline. The first oxygen-hydrogen analyzer 6 monitors the hydrogen content in the total oxygen produced by several alkaline electrolytic cells 2.

[0029] S3: The controller 21 adjusts the opening of the corresponding regulating valve 7 according to the value of the flow meter 24, injects the oxygen and alkali solution mixture in the anode of the alkaline electrolytic cell 2 into the integrated tower 8, and separates the oxygen and alkali solution mixture; S4: The alkali liquid separated by the integrated tower 8 flows downward and is discharged into the alkali liquid drainer 10, and the alkali liquid of the alkali liquid drainer 10 is injected into the oxygen separator 4; The specific steps of S4 are: When the differential pressure transmitter 17 measures that the liquid level of the alkali solution in the integrated tower 8 reaches the high value set by the controller 21, the controller 21 controls the first pneumatic ball valve 9 to open, and the alkali solution flows from the integrated tower 8 into the alkali solution drain 10; When the differential pressure transmitter 17 measures that the liquid level of the alkali solution in the integrated tower 8 reaches the low value set by the controller 21, the controller 21 controls the first pneumatic ball valve 9 to close, preventing the alkali solution from flowing from the integrated tower 8 into the alkali solution drain 10; When the level gauge 18 measures that the liquid level of the alkali liquid in the alkali liquid drainer 10 reaches the high value set by the controller 21, the controller 21 controls the second pneumatic ball valve 11 and the third pneumatic ball valve 13 to open simultaneously, and starts the magnetic pump 12 to inject the alkali liquid from the alkali liquid drainer 10 into the liquid phase in the oxygen separator 4; When the liquid level value of the alkali liquid in the alkali liquid drainer 10 measured by the liquid level meter 18 reaches the low value set by the controller 21, the controller 21 controls the second pneumatic ball valve 11 and the third pneumatic ball valve 13 to close at the same time, turns off the magnetic pump 12, and prevents the alkali liquid from being injected from the alkali liquid drainer 10 into the liquid phase in the oxygen separator 4.

[0030] S5: The oxygen separated by the integrated tower 8 flows upward into the gas phase of the oxygen separator 4. A small amount of oxygen enters the second oxygen-hydrogen analyzer 16 through the pipeline. The oxygen-hydrogen analyzer 16 monitors the amount of hydrogen contained in the oxygen produced by the single alkaline electrolyzer 2.

[0031] Example 1 The one-to-many alkaline water electrolysis hydrogen production monitoring system proposed in this embodiment is as follows: Figure 1 As shown, it includes several alkali liquid circulation pumps 1, each alkali liquid circulation pump 1 is connected to an alkaline electrolytic cell 2 by a pipeline, a flow meter 24 is provided between each alkali liquid circulation pump 1 and the corresponding alkaline electrolytic cell 2, the cathode end of each alkaline electrolytic cell 2 is commonly connected to an oxygen-in-hydrogen analysis component, the anode end of each alkaline electrolytic cell 2 is commonly connected to an oxygen-in-hydrogen analysis component, a monitoring component is connected to the oxygen-in-hydrogen analysis component by a pipeline between each alkaline electrolytic cell 2 and the hydrogen-in-oxygen analysis component, each monitoring component is connected to the oxygen-in-hydrogen analysis component, each alkali liquid circulation pump 1 is commonly connected to an alkali liquid cooler 20, the alkali liquid cooler 20 is respectively connected to the oxygen-in-hydrogen analysis component and the hydrogen-in-oxygen analysis component, each monitoring component is data-connected to a controller 21, and the controller 21 is data-connected to each flow meter 24.

[0032] Example 2 The one-to-many alkaline water electrolysis hydrogen production monitoring system proposed in this embodiment, based on Example 1, also includes a hydrogen-oxygen analysis component including a hydrogen separator 3, the hydrogen separator 3 is connected to the cathode end of each alkaline electrolytic cell 2 through a pipeline, the hydrogen separator 3 is connected to the alkaline liquid cooler 20 through a pipeline, the hydrogen separator 3 is connected to the hydrogen outlet pipeline 22, and the hydrogen outlet pipeline 22 is provided with a hydrogen-oxygen analyzer 5.

[0033] The oxygen-hydrogen analysis component includes an oxygen separator 4, which is connected to the anode end of each alkaline electrolyzer 2 via a pipeline. The oxygen separator 4 and each alkaline electrolyzer 2 are connected to the monitoring component via a pipeline. The oxygen separator 4 is connected to each monitoring component via a pipeline. The oxygen separator 4 is connected to the alkali liquid cooler 20 via a pipeline. The oxygen separator 4 is connected to the oxygen outlet pipeline 23, and the first oxygen-hydrogen analyzer 6 is provided on the oxygen outlet pipeline 23.

[0034] Example 3 The one-to-many alkaline water electrolysis hydrogen production monitoring system proposed in this embodiment, based on embodiment 2, further includes that each monitoring component includes an integrated tower 8, each integrated tower 8 is connected between the oxygen separator 4 and each alkaline electrolyzer 2 through a pipeline, a regulating valve 7 is provided between the integrated tower 8 and the alkaline electrolyzer 2, the top of the integrated tower 8 is connected to the oxygen separator 4 through a pipeline, and a check valve 15 and a second oxygen-hydrogen analyzer 16 are provided in sequence between the integrated tower 8 and the oxygen separator 4.

[0035] The bottom pipeline of the integrated tower 8 is connected to a lye drainer 10, the other end of the pipeline of the lye drainer 10 is connected to a magnetic pump 12, the other end of the magnetic pump 12 is connected to the oxygen separator 4 through a pipeline, a first pneumatic ball valve 9 is arranged between the integrated tower 8 and the lye drainer 10, a second pneumatic ball valve 11 is arranged between the lye drainer 10 and the magnetic pump 12, and a third pneumatic ball valve 13 and a first check valve 14 are arranged in sequence between the magnetic pump 12 and the oxygen separator 4.

[0036] Example 4 The one-to-many alkaline water electrolysis hydrogen production monitoring system proposed in this embodiment, based on Example 3, also includes a differential pressure transmitter 17 provided on the tower of each integrated tower 8, a liquid level meter 18 provided on each alkali liquid drainer 10, and each integrated tower 8 and alkali liquid cooler 20 are connected to cooling water 19 through a stainless steel pipeline.

[0037] The controller 21 communicates signals with each regulating valve 7, each first pneumatic ball valve 9, each second pneumatic ball valve 11, each magnetic pump 12, each third pneumatic ball valve 13, each differential pressure transmitter 17, each liquid level meter 18 and each flow meter 24 through data lines or wireless networks.

[0038] Example 5 The one-to-many alkaline water electrolysis hydrogen production monitoring method proposed in this embodiment uses the one-to-many alkaline water electrolysis hydrogen production monitoring system described in any one of Examples 1-4, including the following steps: S1: Alkali solution circulation pump 1 injects alkaline solution into alkaline electrolytic cell 2, the cathode of alkaline electrolytic cell 2 generates hydrogen, and the anode of alkaline electrolytic cell 2 generates oxygen; S2: monitoring the oxygen content in the total hydrogen generated at the cathodes of all alkaline electrolytic cells 2, and monitoring the hydrogen content in the total oxygen generated at the anodes of all alkaline electrolytic cells 2; S3: The controller 21 adjusts the opening of the corresponding regulating valve 7 according to the value of the flow meter 24, injects the oxygen and alkali solution mixture in the anode of the alkaline electrolytic cell 2 into the integrated tower 8, and separates the oxygen and alkali solution mixture; S4: The alkali liquid separated by the integrated tower 8 flows downward and is discharged into the alkali liquid drainer 10, and the alkali liquid of the alkali liquid drainer 10 is injected into the oxygen separator 4; S5: The oxygen separated by the integrated tower 8 flows upward into the gas phase of the oxygen separator 4. A small amount of oxygen enters the second oxygen-hydrogen analyzer 16 through the pipeline. The oxygen-hydrogen analyzer 16 monitors the amount of hydrogen contained in the oxygen produced by the single alkaline electrolyzer 2.

[0039] Example 6 The one-to-many alkaline water electrolysis hydrogen production monitoring method proposed in this embodiment uses the one-to-many alkaline water electrolysis hydrogen production monitoring system described in any one of Examples 1-4, and further includes the following steps based on Example 5: The specific steps of S2 are: The hydrogen and alkaline solution at the cathode of the alkaline electrolytic cell 2 flow into the hydrogen separator 3, which separates the hydrogen. The hydrogen enters the hydrogen outlet pipeline 22 from the top of the hydrogen separator 3 and is discharged. A small amount of hydrogen passes through the pipeline and enters the hydrogen oxygen analyzer 5. The hydrogen oxygen analyzer 5 monitors the oxygen content in the total hydrogen produced by several alkaline electrolytic cells 2. Example 7 The one-to-many alkaline water electrolysis hydrogen production monitoring method proposed in this embodiment uses the one-to-many alkaline water electrolysis hydrogen production monitoring system described in any one of Examples 1-4, and further includes the following steps based on Example 6: The specific steps of S4 are: When the differential pressure transmitter 17 measures that the liquid level of the alkali solution in the integrated tower 8 reaches the high value set by the controller 21, the controller 21 controls the first pneumatic ball valve 9 to open, and the alkali solution flows from the integrated tower 8 into the alkali solution drain 10; When the differential pressure transmitter 17 measures that the liquid level of the alkali solution in the integrated tower 8 reaches the low value set by the controller 21, the controller 21 controls the first pneumatic ball valve 9 to close, preventing the alkali solution from flowing from the integrated tower 8 into the alkali solution drain 10; When the level gauge 18 measures that the liquid level of the alkali liquid in the alkali liquid drainer 10 reaches the high value set by the controller 21, the controller 21 controls the second pneumatic ball valve 11 and the third pneumatic ball valve 13 to open simultaneously, and starts the magnetic pump 12 to inject the alkali liquid from the alkali liquid drainer 10 into the liquid phase in the oxygen separator 4; When the liquid level value of the alkali liquid in the alkali liquid drainer 10 measured by the liquid level meter 18 reaches the low value set by the controller 21, the controller 21 controls the second pneumatic ball valve 11 and the third pneumatic ball valve 13 to close at the same time, turns off the magnetic pump 12, and prevents the alkali liquid from being injected from the alkali liquid drainer 10 into the liquid phase in the oxygen separator 4.

Claims

1. One-to-many alkaline water electrolysis hydrogen production monitoring system, characterized in that: The invention comprises a plurality of alkali liquid circulation pumps (1), each alkali liquid circulation pump (1) is connected to an alkaline electrolytic cell (2) via a pipeline, a flow meter (24) is provided between each alkali liquid circulation pump (1) and the corresponding alkaline electrolytic cell (2), the cathode end of each alkaline electrolytic cell (2) is commonly connected to an oxygen-in-hydrogen analysis component, the anode end of each alkaline electrolytic cell (2) is commonly connected to a hydrogen-in-oxygen analysis component, a monitoring component is commonly connected to a pipeline between each alkaline electrolytic cell (2) and the hydrogen-in-oxygen analysis component, each monitoring component is connected to the hydrogen-in-oxygen analysis component, each alkali liquid circulation pump (1) is commonly connected to an alkali liquid cooler (20), the alkali liquid cooler (20) is respectively connected to the oxygen-in-hydrogen analysis component and the hydrogen-in-oxygen analysis component, each monitoring component is data-connected to a controller (21), and the controller (21) is data-connected to each flow meter (24).

2. The one-to-many alkaline water electrolysis hydrogen production monitoring system according to claim 1, characterized in that: The hydrogen-oxygen analysis component includes a hydrogen separator (3), each of the hydrogen separators (3) is connected to the cathode end of each alkaline electrolytic cell (2) via a pipeline, the hydrogen separator (3) is connected to the alkali liquid cooler (20) via a pipeline, the hydrogen separator (3) is connected to a hydrogen outlet pipeline (22), and the hydrogen outlet pipeline (22) is provided with an oxygen-in-hydrogen analyzer (5).

3. The one-to-many alkaline water electrolysis hydrogen production monitoring system according to claim 2, characterized in that: The oxygen-hydrogen analysis component comprises an oxygen separator (4), the oxygen separator (4) and the anode end of each alkaline electrolytic cell (2) are connected via a pipeline, the oxygen separator (4) and each alkaline electrolytic cell (2) are connected to the monitoring component via a pipeline, the oxygen separator (4) and each monitoring component are connected via a pipeline, the oxygen separator (4) and the alkaline liquid cooler (20) are connected via a pipeline, the oxygen separator (4) is connected to an oxygen outlet pipeline (23), and a first oxygen-hydrogen analyzer (6) is provided on the oxygen outlet pipeline (23).

4. The one-to-many alkaline water electrolysis hydrogen production monitoring system according to claim 3, characterized in that: Each monitoring assembly includes an integrated tower (8), each integrated tower (8) is connected between the oxygen separator (4) and each alkaline electrolytic cell (2) through a pipeline, a regulating valve (7) is provided between the integrated tower (8) and the alkaline electrolytic cell (2), the top of the integrated tower (8) is connected to the oxygen separator (4) through a pipeline, and a check valve (15) and a second hydrogen-in-oxygen analyzer (16) are provided in sequence between the integrated tower (8) and the oxygen separator (4).

5. The one-to-many alkaline water electrolysis hydrogen production monitoring system according to claim 4, characterized in that: The bottom pipeline of the integrated tower (8) is connected to a alkali liquid drainer (10), the other end of the pipeline of the alkali liquid drainer (10) is connected to a magnetic pump (12), the other end of the magnetic pump (12) is connected to the oxygen separator (4) through a pipeline, a first pneumatic ball valve (9) is provided between the integrated tower (8) and the alkali liquid drainer (10), a second pneumatic ball valve (11) is provided between the alkali liquid drainer (10) and the magnetic pump (12), and a third pneumatic ball valve (13) and a first check valve (14) are provided in sequence between the magnetic pump (12) and the oxygen separator (4).

6. The one-to-many alkaline water electrolysis hydrogen production monitoring system according to claim 5, characterized in that: Each integrated tower (8) is provided with a differential pressure transmitter (17), each alkali liquid drainer (10) is provided with a liquid level gauge (18), and each integrated tower (8) and the alkali liquid cooler (20) are connected to cooling water (19) via a stainless steel pipeline.

7. The one-to-many alkaline water electrolysis hydrogen production monitoring system according to claim 6, characterized in that: The controller (21) communicates signals with each regulating valve (7), each first pneumatic ball valve (9), each second pneumatic ball valve (11), each magnetic pump (12), each third pneumatic ball valve (13), each differential pressure transmitter (17), each liquid level meter (18) and each flow meter (24) through a data line or a wireless network.

8. A one-to-many alkaline water electrolysis hydrogen production monitoring method, characterized in that: The one-to-many alkaline water electrolysis hydrogen production monitoring system according to any one of claims 1 to 7 comprises the following steps: S1: an alkali solution circulation pump (1) injects alkali solution into the alkaline electrolytic cell (2), hydrogen is generated at the cathode of the alkaline electrolytic cell (2), and oxygen is generated at the anode of the alkaline electrolytic cell (2); S2: monitoring the oxygen content in the total hydrogen generated at the cathode of all alkaline electrolytic cells (2), and monitoring the hydrogen content in the total oxygen generated at the anode of all alkaline electrolytic cells (2); S3: The controller (21) adjusts the opening of the corresponding regulating valve (7) according to the size of the flow meter (24), injects the oxygen and alkali solution mixture in the anode of the alkaline electrolytic cell (2) into the integrated tower (8), and separates the oxygen and alkali solution mixture; S4: the alkali liquid separated by the integrated tower (8) flows downward and is discharged into the alkali liquid drainer (10), and the alkali liquid in the alkali liquid drainer (10) is injected into the oxygen separator (4); S5: The oxygen separated by the integrated tower (8) flows upward into the gas phase of the oxygen separator (4). A small amount of oxygen passes through the pipeline and enters the second oxygen-hydrogen analyzer (16). The oxygen-hydrogen analyzer (16) monitors the amount of hydrogen contained in the oxygen produced by the single alkaline electrolyzer (2).

9. The one-to-many alkaline water electrolysis hydrogen production monitoring method according to claim 8, characterized in that: The specific steps of S2 are: The hydrogen and alkaline solution at the cathode of the alkaline electrolytic cell (2) flow into the hydrogen separator (3), the hydrogen separator (3) separates the hydrogen, and the hydrogen enters the hydrogen outlet pipeline (22) from the top of the hydrogen separator (3) and is discharged. A small amount of hydrogen enters the hydrogen oxygen analyzer (5) when passing through the pipeline. The hydrogen oxygen analyzer (5) monitors the oxygen content in the total hydrogen produced by several alkaline electrolytic cells (2); Oxygen and alkaline solution at the anode of the alkaline electrolytic cell (2) flow into the oxygen separator (4), and the oxygen separator (4) separates the oxygen. The oxygen enters the oxygen outlet pipeline (23) from the top of the oxygen separator (4) and is discharged. A small amount of oxygen enters the first oxygen-hydrogen analyzer (6) when passing through the pipeline. The first oxygen-hydrogen analyzer (6) monitors the total hydrogen content in the oxygen produced by several alkaline electrolytic cells (2).

10. The one-to-many alkaline water electrolysis hydrogen production monitoring method according to claim 8, characterized in that: The specific steps of S4 are: When the differential pressure transmitter (17) measures that the liquid level of the alkali solution in the integrated tower (8) reaches the high level value set by the controller (21), the controller (21) controls the first pneumatic ball valve (9) to open, and the alkali solution flows from the integrated tower (8) into the alkali solution drain (10); When the differential pressure transmitter (17) measures that the liquid level of the alkali solution in the integrated tower (8) reaches the low value set by the controller (21), the controller (21) controls the first pneumatic ball valve (9) to close, thereby preventing the alkali solution from flowing from the integrated tower (8) into the alkali solution drain (10); When the level meter (18) measures that the level of the alkali liquid in the alkali liquid drainer (10) reaches the high level value set by the controller (21), the controller (21) controls the second pneumatic ball valve (11) and the third pneumatic ball valve (13) to open simultaneously, starts the magnetic pump (12), and injects the alkali liquid from the alkali liquid drainer (10) into the liquid phase in the oxygen separator (4); When the level value of the alkali solution in the alkali solution drainer (10) measured by the liquid level meter (18) reaches the low value set by the controller (21), the controller (21) controls the second pneumatic ball valve (11) and the third pneumatic ball valve (13) to close simultaneously, turning off the magnetic pump (12) to prevent the alkali solution from being injected from the alkali solution drainer (10) into the liquid phase in the oxygen separator (4).

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