Water electrolysis hydrogen production system

Abstract

The utility model discloses a water electrolysis hydrogen production system. The water electrolysis hydrogen production system comprises an electrolytic tank; the oxygen separation device is connected with the electrolytic bath, and the oxygen separation device is used for separating the gas-liquid mixture to obtain oxygen and outputting the oxygen; the gas storage device is connected with the oxygen separation device, so that oxygen output by the oxygen separation device can flow into the gas storage device, and the output end of the gas storage device can be connected with at least one pneumatic device of the water electrolysis hydrogen production system. According to the water electrolysis hydrogen production system disclosed by the embodiment of the utility model, when the water electrolysis hydrogen production system is stably operated, the oxygen separation device can stably output oxygen and ensure that the pneumatic equipment can obtain stable pneumatic air source supply, so that the dependence on the pneumatic air source generated by the air compressor is reduced; the electric energy consumption caused by continuously starting the air compressor is reduced, the oxygen output by the oxygen separation device is reused, and the economical efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen production, in particular to a water electrolysis hydrogen production system. Background Art

[0002] The water electrolysis hydrogen production system includes an electrolyzer, a gas-liquid separation device, a purification unit, a utility unit, etc. In the current water electrolysis hydrogen production system, there are a large number of pneumatic devices, such as a large number of pneumatic valves. The action switching of these pneumatic devices requires special equipment to provide them with a pneumatic gas source with a constant pressure. In the related technology, an air compressor is often set to continuously generate the pneumatic gas source. The air compressor needs to be kept in an open state all the time, and the power consumption is relatively large. Utility Model Content

[0003] The utility model provides a water electrolysis hydrogen production system, which uses the oxygen output by an oxygen separation device as a pneumatic gas source to improve economic efficiency.

[0004] An embodiment of the utility model provides a water electrolysis hydrogen production system, which includes: an electrolytic cell; an oxygen separation device connected to the electrolytic cell, the oxygen separation device is used to separate oxygen from a gas-liquid mixture and output the oxygen; a gas storage device connected to the oxygen separation device, so that the oxygen output by the oxygen separation device can flow into the gas storage device, and the output end of the gas storage device can be connected to at least one pneumatic device of the water electrolysis hydrogen production system.

[0005] According to the water electrolysis hydrogen production system of the embodiment of the utility model, it includes an oxygen separation device and a gas storage device. The oxygen separation device is used to separate oxygen from a gas-liquid mixture and output the oxygen. The oxygen output by the oxygen separation device can flow into the gas storage device. The output end of the gas storage device can be connected to at least one pneumatic device of the water electrolysis hydrogen production system. Therefore, in the above-mentioned water electrolysis hydrogen production system, the oxygen output by the oxygen separation device can be used as a pneumatic gas source for at least one pneumatic device of the water electrolysis hydrogen production system after being temporarily stored in the gas storage device. When the water electrolysis hydrogen production system is running stably, the oxygen separation device can stably output oxygen to ensure that the pneumatic device can obtain a stable supply of pneumatic gas source, thereby reducing the dependence on the air compressor to generate the pneumatic gas source, reducing the power consumption caused by continuously turning on the air compressor, and reusing the oxygen output by the oxygen separation device to improve economic efficiency.

[0006] According to any of the aforementioned embodiments of the utility model, the water electrolysis hydrogen production system further includes: a gas pressure regulating module connected to the gas storage device, for regulating the gas pressure in the gas storage device. In the above embodiment, the water electrolysis hydrogen production system further includes a gas pressure regulating module, which can regulate the gas pressure in the gas storage device, so that the gas pressure regulating module can provide a pneumatic gas source that meets the pressure requirements to at least one pneumatic device.

[0007] According to any of the aforementioned embodiments of the utility model, the air pressure regulating module includes: a pressure gauge connected to the air storage device, the pressure gauge is used to obtain the air pressure in the air storage device; a venting line connected to the air storage device; a first regulating valve, arranged on the venting line, the first regulating valve is connected to the pressure gauge signal, and the first regulating valve is configured to adjust its own opening according to the air pressure value obtained by the pressure gauge. In the above embodiment, the air pressure regulating module includes a pressure gauge, a venting line and a first regulating valve, the first regulating valve is connected to the pressure gauge signal, so as to adjust its own opening according to the air pressure value obtained by the pressure gauge. The above air pressure regulating module can form a feedback control module through the signal linkage between the first regulating valve and the pressure gauge, so as to accurately and timely adjust the air pressure in the air storage device.

[0008] According to any of the aforementioned embodiments of the utility model, the water electrolysis hydrogen production system also includes: a gas processing device, connected to the output end of the gas storage device, and the gas output by the gas storage device flows to at least one pneumatic device of the water electrolysis hydrogen production system after passing through the gas processing device.

[0009] According to any of the aforementioned embodiments of the utility model, the water electrolysis hydrogen production system further includes: an auxiliary gas source connected to the gas storage device, and the auxiliary gas source can input gas to the gas storage device. In the above embodiment, the water electrolysis hydrogen production system also includes an auxiliary gas source, so that providing a stable pneumatic gas source for at least one pneumatic device can have double protection. Under the condition that the oxygen output by the oxygen separation device is insufficient to maintain the pressure requirement of the pneumatic gas source, the auxiliary gas source can be turned on, and the gas output by the auxiliary gas source is mixed with oxygen to ensure that the gas output by the gas storage device can meet the pressure requirement of the pneumatic gas source.

[0010] According to any of the aforementioned embodiments of the present utility model, the auxiliary gas source is an air compressor; or the auxiliary gas source is a nitrogen generating device.

[0011] According to any of the above embodiments of the utility model, the oxygen separation device is connected to the gas storage device via a first delivery pipeline, the auxiliary gas source is connected to the gas storage device via a second delivery pipeline, and a cut-off valve is provided on the second delivery pipeline. In the above embodiments, by providing a cut-off valve on the second delivery pipeline, it is possible to actively control whether the auxiliary gas source is connected to the gas storage device, so as to more flexibly configure the gas of the gas storage device.

[0012] According to any of the aforementioned embodiments of the utility model, the water electrolysis hydrogen production system has an initial startup state and a stable operation state. In the initial startup state, the shut-off valve is opened, and the auxiliary gas source and the oxygen separation device jointly input gas to the gas storage device; in the stable operation state, the shut-off valve is closed, and the oxygen separation device inputs gas to the gas storage device. In the above embodiment, in the initial startup state, the oxygen generated by the oxygen separation device may not meet the pressure requirement of the pneumatic gas source. At this time, the shut-off valve is opened, and the auxiliary gas source and the oxygen separation device jointly input gas to the gas storage device to ensure that the gas output by the gas storage device in the initial startup state can meet the pressure requirement of the pneumatic gas source. In the stable operation state, the oxygen separation device can stably output oxygen that meets the pressure requirement of the pneumatic gas source. At this time, closing the shut-off valve can save the energy consumption of the auxiliary gas source and improve the economy of the water electrolysis hydrogen production system.

[0013] According to any of the aforementioned embodiments of the utility model, the second delivery pipeline is connected to the first delivery pipeline, so that the oxygen separation device is connected to the gas storage device through the second delivery pipeline and the first delivery pipeline, and a check valve is also provided on the second delivery pipeline. In the above embodiment, the second delivery pipeline is connected to the first delivery pipeline, so that the gas generated by the auxiliary gas source can enter the gas storage device after mixing with the oxygen generated by the oxygen separation device in the first delivery pipeline. A check valve is also provided on the second delivery pipeline to prevent the oxygen generated by the oxygen separation device from flowing from the second delivery pipeline to the auxiliary gas source.

[0014] According to any of the aforementioned embodiments of the present utility model, a second regulating valve is provided on the first delivery pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a structural schematic diagram of an embodiment of a water electrolysis hydrogen production system of the utility model;

[0017] Figure 2 It is a structural schematic diagram of an alternative embodiment of the water electrolysis hydrogen production system of the utility model.

[0018] Description of reference numerals:

[0019] 110-electrolyzer;

[0020] 120- oxygen separation device;

[0021] 130-gas storage device;

[0022] 140-air pressure regulating module; 141-pressure gauge; 142-venting pipeline; 143-first regulating valve;

[0023] 150- Gas processing device;

[0024] 160- auxiliary gas source; 160a- air compressor; 160b- nitrogen generating device;

[0025] 170 - first delivery pipeline; 171 - second regulating valve;

[0026] 180 - second delivery pipeline; 181 - cut-off valve; 182 - check valve.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] The embodiment of the utility model provides a water electrolysis hydrogen production system. Figure 1The schematic diagram of the structure of an embodiment of the water electrolysis hydrogen production system of the utility model. The water electrolysis hydrogen production system includes an electrolyzer 110, an oxygen separation device 120 and a gas storage device 130. The oxygen separation device 120 is connected to the electrolyzer 110, and the oxygen separation device 120 is used to separate oxygen from a gas-liquid mixture and output the oxygen. The gas storage device 130 is connected to the oxygen separation device 120 so that the oxygen output by the oxygen separation device 120 can flow into the gas storage device 130. The output end of the gas storage device 130 can be connected to at least one pneumatic device of the water electrolysis hydrogen production system.

[0032] According to the water electrolysis hydrogen production system of the embodiment of the utility model, it includes an oxygen separation device 120 and a gas storage device 130. The oxygen separation device 120 is used to separate oxygen from the gas-liquid mixture and output the oxygen. The oxygen output by the oxygen separation device 120 can flow into the gas storage device 130. The output end of the gas storage device 130 can be connected to at least one pneumatic device of the water electrolysis hydrogen production system. Therefore, in the above-mentioned water electrolysis hydrogen production system, the oxygen output by the oxygen separation device 120 can be used as a pneumatic gas source for at least one pneumatic device of the water electrolysis hydrogen production system after being temporarily stored in the gas storage device 130. When the water electrolysis hydrogen production system is running stably, the oxygen separation device 120 can stably output oxygen to ensure that the pneumatic device can obtain a stable pneumatic gas source supply, thereby reducing the dependence on the air compressor to generate the pneumatic gas source, reducing the power consumption caused by the continuous opening of the air compressor, and reusing the oxygen output by the oxygen separation device 120 to improve the economy.

[0033] Pneumatic equipment includes, for example, pneumatic valves in a water electrolysis hydrogen production system.

[0034] In some embodiments, the water electrolysis hydrogen production system includes a gas-liquid separation unit, a purification unit, and a utility unit. The gas-liquid separation unit is connected to the electrolyzer 110 for gas-liquid separation. The gas-liquid separation unit includes the above-mentioned oxygen separation device 120. In some embodiments, the gas-liquid separation unit may also include a hydrogen separation device connected to the electrolyzer 110. In some embodiments, the gas-liquid separation unit, the purification unit and other structures have a plurality of pneumatic valves, which are part of the pneumatic equipment of the water electrolysis hydrogen production system.

[0035] In some embodiments, the water electrolysis hydrogen production system further includes a gas pressure regulating module 140 , which is connected to the gas storage device 130 and is used to regulate the gas pressure in the gas storage device 130 .

[0036] In the above embodiment, the water electrolysis hydrogen production system further includes a gas pressure regulating module 140, which can regulate the gas pressure in the gas storage device 130, so that the gas pressure regulating module 140 can provide a pneumatic gas source that meets the pressure requirements to at least one pneumatic device.

[0037] In some embodiments, the air pressure regulating module 140 includes a pressure gauge 141, a venting line 142, and a first regulating valve 143. The pressure gauge 141 is connected to the air storage device 130, and the pressure gauge 141 is used to obtain the air pressure in the air storage device 130. The venting line 142 is connected to the air storage device 130. The first regulating valve 143 is arranged on the venting line 142, and the first regulating valve 143 is connected to the pressure gauge 141 by signal, and the first regulating valve 143 is configured to adjust its opening according to the air pressure value obtained by the pressure gauge 141.

[0038] In the above embodiment, the air pressure regulating module 140 includes a pressure gauge 141, a venting pipeline 142 and a first regulating valve 143. The first regulating valve 143 is connected to the pressure gauge 141 by signal, so as to adjust its opening according to the air pressure value obtained by the pressure gauge 141. The air pressure regulating module 140 can form a feedback control module through the signal linkage between the first regulating valve 143 and the pressure gauge 141, so as to accurately and timely adjust the air pressure in the air storage device 130.

[0039] In some embodiments, the water electrolysis hydrogen production system further includes a gas processing device 150. The gas processing device 150 is connected to the output end of the gas storage device 130. The gas output by the gas storage device 130 flows to at least one pneumatic device of the water electrolysis hydrogen production system after passing through the gas processing device 150.

[0040] In some embodiments, the water electrolysis hydrogen production system further includes an auxiliary gas source 160 , which is connected to the gas storage device 130 , and the auxiliary gas source 160 can input gas into the gas storage device 130 .

[0041] In the above embodiment, the water electrolysis hydrogen production system also includes an auxiliary gas source 160, so that providing a stable pneumatic gas source for pneumatic equipment can have double protection. Under the working condition that the oxygen output by the oxygen separation device 120 is insufficient to maintain the pressure requirement of the pneumatic gas source, the auxiliary gas source 160 can be turned on. After the gas output by the auxiliary gas source 160 is mixed with oxygen, it is ensured that the gas output by the gas storage device 130 can meet the pressure requirement of the pneumatic gas source.

[0042] like Figure 1 In this embodiment, the auxiliary gas source 160 is an air compressor 160a. The air compressor 160a can generate compressed gas.

[0043] Figure 2The schematic diagram of the structure of an alternative embodiment of the water electrolysis hydrogen production system of the utility model. In an alternative embodiment, the auxiliary gas source 160 is a nitrogen generator 160b. The nitrogen generator 160b can generate nitrogen. In some embodiments, the water electrolysis hydrogen production system needs to undergo a nitrogen replacement process before starting up, so the water electrolysis hydrogen production system usually includes a nitrogen generator 160b. In this embodiment, the nitrogen generator 160b can be reused to play a role in the nitrogen replacement process and in the auxiliary generation of a pneumatic gas source.

[0044] In an alternative embodiment, the auxiliary gas source 160 is a nitrogen generator 160b. In this case, the water electrolysis hydrogen production system no longer needs to be equipped with an air compressor 160a, thereby reducing the space occupied by the equipment and reducing the equipment cost.

[0045] like Figure 1 or Figure 2 In some embodiments, the oxygen separation device 120 is connected to the gas storage device 130 via a first delivery pipeline 170. The auxiliary gas source 160 is connected to the gas storage device 130 via a second delivery pipeline 180, and a cut-off valve 181 is provided on the second delivery pipeline 180. By providing the cut-off valve 181 on the second delivery pipeline 180, it is possible to actively control whether the auxiliary gas source 160 is connected to the gas storage device 130, so as to configure the gas of the gas storage device 130 more flexibly.

[0046] In some embodiments, the water electrolysis hydrogen production system has an initial startup state and a stable operation state.

[0047] In the initial startup state, the shut-off valve 181 is opened, and the auxiliary gas source 160 and the oxygen separation device jointly input gas to the gas storage device 130 .

[0048] In a stable operating state, the shut-off valve 181 is closed, and the oxygen separation device inputs gas to the gas storage device 130 .

[0049] In the above embodiment, in the initial startup state, the oxygen generated by the oxygen separation device may not meet the pressure requirement of the pneumatic gas source. At this time, the shut-off valve 181 is opened, and the auxiliary gas source 160 and the oxygen separation device jointly input gas to the gas storage device 130 to ensure that the gas output by the gas storage device 130 in the initial startup state can meet the pressure requirement of the pneumatic gas source. In the stable operation state, the oxygen separation device can stably output oxygen that meets the pressure requirement of the pneumatic gas source. At this time, closing the shut-off valve 181 can save the energy consumption of the auxiliary gas source 160 and improve the economy of the water electrolysis hydrogen production system.

[0050] In some embodiments, the second delivery pipeline 180 is connected to the first delivery pipeline 170 , so that the oxygen separation device 120 is connected to the gas storage device 130 through the second delivery pipeline 180 and the first delivery pipeline 170 , and a check valve is also provided on the second delivery pipeline 180 .

[0051] In the above embodiment, the second delivery pipeline 180 is connected to the first delivery pipeline 170, so that the gas generated by the auxiliary gas source 160 can enter the gas storage device 130 after mixing with the oxygen generated by the oxygen separation device 120 in the first delivery pipeline 170. A check valve 182 is also provided on the second delivery pipeline 180 to prevent the oxygen generated by the oxygen separation device 120 from flowing from the second delivery pipeline 180 to the auxiliary gas source 160.

[0052] In some embodiments, a second regulating valve 171 is disposed on the first delivery pipeline 170 .

[0053] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A water electrolysis hydrogen production system, characterized in that: include: Electrolyzer; An oxygen separation device, connected to the electrolyzer, for separating oxygen from the gas-liquid mixture and outputting the oxygen; The gas storage device is connected to the oxygen separation device so that the oxygen output by the oxygen separation device can flow into the gas storage device, and the output end of the gas storage device can be connected to at least one pneumatic device of the water electrolysis hydrogen production system.

2. The water electrolysis hydrogen production system according to claim 1, characterized in that: Also includes: The air pressure regulating module is connected to the air storage device and is used to regulate the air pressure in the air storage device.

3. The water electrolysis hydrogen production system according to claim 2, characterized in that: The air pressure regulating module comprises: A pressure gauge connected to the gas storage device, the pressure gauge is used to obtain the gas pressure in the gas storage device; a vent pipeline connected to the gas storage device; The first regulating valve is arranged on the vent pipeline, the first regulating valve is connected to the pressure gauge signal, and the first regulating valve is configured to adjust its opening according to the air pressure value obtained by the pressure gauge.

4. The water electrolysis hydrogen production system according to claim 1, characterized in that: Also includes: A gas processing device is connected to the output end of the gas storage device, and the gas output by the gas storage device flows to at least one pneumatic device of the water electrolysis hydrogen production system after passing through the gas processing device.

5. The water electrolysis hydrogen production system according to claim 1, characterized in that: Also includes: An auxiliary gas source is connected to the gas storage device, and the auxiliary gas source can input gas into the gas storage device.

6. The water electrolysis hydrogen production system according to claim 5, characterized in that: The auxiliary air source is an air compressor; or The auxiliary gas source is a nitrogen generating device.

7. The water electrolysis hydrogen production system according to claim 5, characterized in that: The oxygen separation device is connected to the gas storage device through a first delivery pipeline, and the auxiliary gas source is connected to the gas storage device through a second delivery pipeline. A cut-off valve is provided on the second delivery pipeline.

8. The water electrolysis hydrogen production system according to claim 7, characterized in that: The water electrolysis hydrogen production system has an initial startup state and a stable operation state. In the initial startup state, the shut-off valve is opened, and the auxiliary gas source and the oxygen separation device jointly input gas to the gas storage device; In the stable operation state, the shut-off valve is closed, and the oxygen separation device inputs gas to the gas storage device.

9. The water electrolysis hydrogen production system according to claim 7, characterized in that: The second delivery pipeline is connected to the first delivery pipeline, so that the oxygen separation device is connected to the gas storage device through the second delivery pipeline and the first delivery pipeline, and a check valve is also provided on the second delivery pipeline.

10. The water electrolysis hydrogen production system according to claim 7, characterized in that: A second regulating valve is disposed on the first delivery pipeline.

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