Hydrogen production system
By setting up a gas-liquid separation module and a power pump in the hydrogen production system to regulate the circulation and flow of the electrolyte, the problem of low gas purity under low power of the electrolyzer is solved, and efficient gas utilization and extended pump life are achieved.
Patent Information
- Application Number
- CN202422844384.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-20
AI Technical Summary
When the electrolytic cell operates at low power, the purity of the gas formed by electrolysis is low, and the circulation volume of the electrolyte needs to be reduced, resulting in a minimum workload limit for the pump, affecting its service life and causing waste of resources.
By setting up a gas-liquid separation module, the first and second power pumps, a flow meter and a regulating valve, the circulation and flow regulation of the electrolyte are achieved, the operation state of the electrolytic cell under low power and normal power is adapted, the gas purity and utilization rate are improved, and resource waste is reduced.
When the electrolyzer is running at low power, the gas purity is improved, the gas venting is reduced, the service life of the pump is extended, the utilization rate of the electrolyte and the heat dissipation effect are improved, and automatic control is achieved.
Smart Images
Figure CN223386244U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of hydrogen production technology, and in particular to a hydrogen production system. Background Art
[0002] As the hydrogen production industry develops and becomes increasingly large-scale, a general hydrogen production system consists of multiple electrolyzers connected in parallel to a gas-liquid separation device. The operating power of the electrolyzer fluctuates under power fluctuations. In related technologies, the purity of the gas electrolyzed is low when the electrolyzer operates at low power. Utility Model Content
[0003] The main purpose of this application is to propose a hydrogen production system, which aims to improve the purity of the gas generated by electrolysis when the electrolyzer is operated at low power.
[0004] To achieve the above-mentioned purpose, the hydrogen production system proposed in the present application includes an electrolyzer, a gas-liquid separation module, a first power pump, a second power pump, a flow meter and a regulating valve, wherein the electrolyzer is provided with at least two, and the electrolyzer has an inlet and an outlet; the gas-liquid separation module has an inlet and a discharge port, and the inlet is connected to the outlet; the first power pump has a first liquid inlet end and a first liquid outlet end, the first liquid inlet end is connected to the discharge port, and the first liquid outlet end is connected to the inlets of at least two of the electrolyzers; the second power pump has a second liquid inlet end and a second liquid outlet end, the second liquid inlet end is connected to the discharge port, and the second liquid outlet end is connected to the inlet of one of the electrolyzers; the flow meter is provided on the pipeline between the second liquid outlet end and the corresponding inlet; the regulating valve is provided on the pipeline between the inlet of at least one of the electrolyzers and the first liquid outlet end.
[0005] In one embodiment, at least one flow meter and the regulating valve are arranged in series between the first liquid outlet and the corresponding inlet.
[0006] In one embodiment, one end of the regulating valve is connected to the first liquid outlet, and the other end of the regulating valve is connected to a pipeline between the flow meter and the second liquid outlet.
[0007] In one embodiment, the flow meter provided in series between the first liquid outlet and the corresponding inlet is electrically connected to the regulating valve.
[0008] In one embodiment, the hydrogen production system further comprises:
[0009] a first control valve, the first control valve being connected in series with the first power pump; and / or,
[0010] A second control valve is connected in series with the second power pump.
[0011] In one embodiment, the difference between the number of the electrolytic cells and the number of the regulating valves is no more than 1.
[0012] In one embodiment, the number of the first power pumps is less than the number of the electrolytic cells; and / or, at least two second power pumps are provided.
[0013] In one embodiment, the hydrogen production system further includes a switch valve, and the switch valve is arranged in parallel with the regulating valve.
[0014] In one embodiment, the gas-liquid separation module includes a hydrogen separator and an oxygen separator, and the hydrogen separator and the oxygen separator are arranged in parallel.
[0015] In one embodiment, the gas-liquid separation module further includes an exhaust port, and the hydrogen production system further includes a gas purification unit, and the gas purification unit is connected to the exhaust port.
[0016] The technical solution of the present application is to connect the inlet of the gas-liquid separator module to the outlet of the electrolytic cell, the first liquid inlet end of the first power pump to the discharge port of the gas-liquid separation module, and the first liquid outlet end of the first power pump to the inlet of at least two electrolytic cells. On the one hand, the mixture carrying part of the electrolyte produced by the electrolytic cell enters the gas-liquid separation module for gas-liquid separation, and the carried electrolyte can flow back to the electrolytic cell through the first power pump; on the other hand, at least two electrolytic cells can be divided into the operating load of one first power pump, and then the electrolyte flow through one first power pump can flow to at least two electrolytic cells respectively, reducing the electrolyte flow of each electrolytic cell, so that the electrolytic cell can adapt to a lower power operating state, and the gas purity is higher when the electrolytic cell is in the low-power operating state, which improves the gas utilization rate and reduces the risk of resource waste caused by gas venting. It also overcomes the minimum limit of the working load of the first power pump and improves the service life of the first power pump. In addition, by providing a regulating valve on the pipeline between the inlet and the first liquid outlet of at least one electrolyzer, the flow rate at the inlet connected thereto can be adjusted by the regulating valve, thereby improving the accuracy of regulating the flow rate of the electrolyte flowing into each electrolyzer. By providing a second power pump, and the second liquid inlet end of the second power pump is connected to the discharge port, and the second liquid outlet end of the second power pump is connected to the inlet of an electrolyzer, the hydrogen production system in this application can be operated in a normal power state by the second power pump. The electrolyte separated by the gas-liquid separation module can be pumped into the electrolyzer by the second power pump, and the flow rate of the electrolyte entering the electrolyzer can be increased, thereby improving the heat dissipation effect of the electrolyzer. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0018] Figure 1 This is a schematic structural diagram of the first embodiment of the hydrogen production system provided in this application;
[0019] Figure 2 This is a schematic structural diagram of a second embodiment of the hydrogen production system provided in this application;
[0020] Figure 3 This is a schematic structural diagram of the third embodiment of the hydrogen production system provided in this application;
[0021] Figure 4 This is a schematic structural diagram of a fourth embodiment of the hydrogen production system provided in this application;
[0022] Figure 5 This is a structural schematic diagram of the fifth embodiment of the hydrogen production system provided by this application;
[0023] Figure 6 This is a structural schematic diagram of the sixth embodiment of the hydrogen production system provided in this application.
[0024] Description of Figure Numbers:
[0025] 100, electrolytic cell; 110, import; 120, export;
[0026] 200, gas-liquid separation module; 210, inlet; 220, liquid discharge port; 230, exhaust port;
[0027] 300, first power pump; 310, first liquid inlet; 320, first liquid outlet;
[0028] 400, second power pump; 410, second liquid inlet; 420, second liquid outlet;
[0029] 500, flow meter;
[0030] 600, regulating valve;
[0031] 710, first control valve; 720, second control valve;
[0032] 800, switch valve;
[0033] 900. Gas purification unit.
[0034] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0035] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.
[0036] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually 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 this application.
[0038] The hydrogen production system includes an electrolyzer, a gas-liquid separation unit, a purification unit, and a utility unit. Currently, with the development of the industry, the scale of the equipment has gradually increased. Generally, multiple electrolyzers are connected in parallel to a gas-liquid separation unit. Currently, the electricity used by the electrolyzer comes from fluctuating energy sources such as wind and light, so the operating power of the electrolyzer also needs to fluctuate with the fluctuation of electricity. This fluctuation sometimes causes the operating power of the electrolyzer to reach a very low value. At this time, if the purity of the electrolyzed gas needs to be guaranteed, the circulation volume of the electrolyte must be reduced at the same time. The circulation of the electrolyte needs to be driven by a pump, and the pump's workload has a minimum limit. For example, the pump's workload can only be maintained at a minimum of about 30%, otherwise it will affect the pump's service life. Therefore, under such a low operating power state, the gas produced by electrolysis in the electrolyzer can only be vented, resulting in a waste of resources.
[0039] In order to improve the purity of the gas generated by electrolysis when the electrolyzer is operating at low power, the present application proposes a hydrogen production system.
[0040] Please refer to Figure 1 and Figure 4 In one embodiment of the present application, the hydrogen production system includes an electrolyzer 100, a gas-liquid separation module 200, a first power pump 300, a second power pump 400, a flow meter 500 and a regulating valve 600. The electrolyzer 100 is provided with at least two, the electrolyzer 100 has an inlet 110 and an outlet 120; the gas-liquid separation module 200 has an inlet 210 and a drain port 220, and the inlet 210 is connected to the outlet 120; the first power pump 300 has a first liquid inlet end 310 and a first liquid outlet end 320, and the first liquid inlet end 310 is connected to the outlet 120. The first liquid outlet 320 is connected to the inlet 110 of at least two electrolytic cells 100 through the discharge port 220; the second power pump 400 has a second liquid inlet 410 and a second liquid outlet 420, the second liquid inlet 410 is connected to the discharge port 220, and a second liquid outlet 420 is connected to the inlet 110 of an electrolytic cell 100; a flow meter 500 is provided on the pipeline between the second liquid outlet 420 and the corresponding inlet 110; a regulating valve 600 is provided on the pipeline between the inlet 110 of at least one electrolytic cell 100 and the first liquid outlet 320.
[0041] The electrolyte in the electrolytic cell 100 generates gas during the electrolysis process. The gas typically includes hydrogen and oxygen, and the generated gas carries a portion of the electrolyte. By connecting the inlet 210 of the gas-liquid separation module 200 to the outlet 120 of the electrolytic cell 100, the gas carrying a portion of the electrolyte generated during the electrolysis process can enter the gas-liquid separation module 200 for gas-liquid separation, thereby further improving the purity of the gas. The gas-liquid separation module 200 also has a drain port 220. By connecting the drain port 220 of the gas-liquid separation module 200 to the inlet 110 of the electrolytic cell 100, the electrolyte can be circulated, thereby improving the utilization rate of the electrolyte. By setting a first power pump 300, the first liquid inlet end 310 of the first power pump 300 is connected to the discharge port 220, and the first liquid outlet end 320 of the first power pump 300 is connected to the inlet 110 of at least two electrolytic cells 100, then the electrolyte can be transported to at least two electrolytic cells 100 at the same time through one first power pump 300. For example, one first power pump 300 can transport electrolyte to two electrolytic cells 100 at the same time, or it can transport electrolyte to three electrolytic cells 100 at the same time, or it can transport electrolyte to more electrolytic cells 100 at the same time, thereby reducing the workload of one first power pump 300 corresponding to each electrolytic cell 100 and reducing the flow rate of electrolyte circulating back to each electrolytic cell 100. At this time, it can adapt to the operating state of the electrolytic cell 100 at low power, improve the purity of the gas generated by the electrolytic cell 100 at low operating power, thereby reducing the risk of gas venting and reducing the risk of resource waste.
[0042] The hydrogen production system in the present application also includes a second power pump 400, the second liquid inlet end 410 of the second power pump 400 is connected to the discharge port 220, and the second liquid outlet end 420 of the second power pump 400 is connected to the inlet 110 of an electrolytic cell 100, so that the hydrogen production system can open the second power pump 400 under normal operating power state, so that a second power pump 400 can supply electrolyte reflux to an electrolytic cell 100, and thus can adapt to increase the reflux amount of electrolyte of the electrolytic cell 100 under normal operating power state, thereby ensuring that it can have a good heat dissipation effect on the electrolytic cell 100.
[0043] Specifically, based on the solution of having at least two electrolytic cells 100, there can be one or at least two second power pumps 400. It is understood that when there are at least two second power pumps 400, the electrolyte flow rate entering each electrolytic cell 100 can be increased, thereby increasing the upper limit of the workload.
[0044] For example, Figure 1As shown, when two electrolytic cells 100 are provided, one second power pump 400 can be provided, and the second liquid outlet 420 of the second power pump 400 is connected to the inlet 110 of one of the two electrolytic cells 100, so that when the electrolytic cell 100 is in a normal operating power state, the second power pump 400 can provide a sufficient amount of electrolyte reflux to the electrolytic cell 100 correspondingly connected thereto, so as to ensure that the electrolytic cell 100 has a good heat dissipation effect. When the other electrolytic cell 100 needs to be in a normal operating power state, the first power pump 300 can provide it with a sufficient amount of electrolyte reflux, so that the other electrolytic cell 100 also has a good heat dissipation effect. In order to adapt to the operation state of the electrolytic cell 100 at low power, the second power pump 400 can be turned off and the first power pump 300 can be turned on, so that the first power pump 300 can simultaneously transport electrolyte to the two electrolytic cells 100, thereby reducing the workload of the first power pump 300 corresponding to each electrolytic cell 100 and reducing the flow rate of the electrolyte circulating back to each electrolytic cell 100. At this time, the electrolytic cell 100 can adapt to the operation state at low power, improve the purity of the gas generated by the electrolytic cell 100 at low operating power, and reduce the risk of gas venting and the risk of resource waste.
[0045] Or, as Figure 2 As shown, when there are three electrolytic cells 100, two second power pumps 400 can be provided, and the second liquid outlet ends 420 of the two power pumps 400 are respectively connected to the inlets 110 of the two electrolytic cells 100. There can be one first power pump 300, and the first liquid outlet end 320 of the first power pump 300 is connected to the inlets 111 of the three electrolytic cells 100. Therefore, when the electrolytic cells 100 are in normal operating power state, the two second power pumps 400 can provide a sufficient amount of electrolyte reflux to the two correspondingly connected electrolytic cells 100 to ensure that the two electrolytic cells 100 have a good heat dissipation effect. The first power pump 300 can provide a sufficient amount of electrolyte reflux to the electrolytic cells 100 that are not connected to the second power pump 400 among the three electrolytic cells 100 to ensure that the electrolytic cells 100 have a good heat dissipation effect. In order to adapt to the operation state of the electrolytic cell 100 at low power, the two second power pumps 400 can be turned off and the first power pump 300 can be turned on, so that the first power pump 300 can simultaneously transport electrolyte to the three electrolytic cells 100, thereby reducing the workload of the first power pump 300 corresponding to each electrolytic cell 100 and reducing the flow rate of the electrolyte circulating back to each electrolytic cell 100. At this time, the electrolytic cell 100 can adapt to the operation state at low power, improve the purity of the gas generated by the electrolytic cell 100 at low operating power, and reduce the risk of gas venting and the risk of resource waste.
[0046] By providing a flow meter 500 on the pipeline between the second liquid outlet 420 and the corresponding inlet 110, the flow rate of the electrolyte flowing back into the corresponding electrolytic cell 100 can be monitored under normal operating conditions. When the flow meter 500 detects that the electrolyte return flow rate is small under normal operating power conditions, the operating power of the second power pump 400 can be increased, thereby increasing the electrolyte return flow rate; when the flow meter 500 detects that the electrolyte return flow rate is large under normal operating power conditions, the operating power of the second power pump 400 can be reduced. It should be noted that in this application, since the first liquid outlet 320 of the first power pump 300 and the second liquid outlet 420 of the second power pump 400 can both be connected to the inlet 110 of the electrolytic cell 100, when operating under normal power conditions, if one of the second power pumps 400 fails, the first power pump 300 can be used as its backup pump.
[0047] By disposing a regulating valve 600 on the pipeline between the inlet 110 and the first liquid outlet 320 of at least one electrolytic cell 100, the regulating valve 600 can be used to regulate the flow rate of the electrolyte entering the electrolytic cell 100 connected to the regulating valve 600, thereby improving the accuracy of regulating the flow rate of the electrolyte entering the low-power electrolytic cell 100 connected to the regulating valve 600. It should be noted that the provision of the regulating valve 600 can ensure that the return flow rate of the electrolyte from the first power pump 300 to each electrolytic cell 100 is evenly distributed, and can also be adjusted to ensure that the return flow rate from the first power pump 300 to one electrolytic cell 100 is less and the return flow rate to another electrolytic cell 100 is greater.
[0048] Specifically, it is understood that a regulating valve 600 may be provided on the pipeline between the first liquid outlet 320 of the first power pump 300 and the inlet 110 of each electrolytic cell 100, thereby improving the accuracy of regulating the flow rate of the electrolyte between the first liquid outlet 320 and the inlet 110 of each electrolytic cell 100. Alternatively, a regulating valve 600 may be provided on the pipeline between the first liquid outlet 320 of the first power pump 300 and the inlets 110 of some of the electrolytic cells 100. For example, when the first liquid outlet 320 of the first power pump 300 is connected to the inlets 110 of both electrolytic cells 100, a regulating valve 600 may be provided on the pipeline between the inlet 110 of only one of the electrolytic cells 100 and the first liquid outlet 320 of the first power pump 300. When the first liquid outlet 320 of a first power pump 300 is connected to the inlets 110 of three electrolytic cells 100, two regulating valves 600 may be provided, and the two regulating valves 600 may be respectively arranged on the pipeline between the inlets 110 of two of the electrolytic cells 100 and the first liquid outlet 320 of the first power pump 300. Of course, it is understandable that the electrolytic cells 100 may be provided with two, three, four or more, etc. When there are two electrolytic cells 100, there may be one first power pump 300, and the first liquid outlet 320 of the first power pump 300 is connected to the inlets 110 of the two electrolytic cells 100; or, when there are three electrolytic cells 100, there may be one first power pump 300, and the first liquid outlet 320 of the first power pump 300 is connected to the inlets 110 of the three electrolytic cells 100; or, when there are three electrolytic cells 100, there may be one first power pump 300, and the first liquid outlet 320 of the first power pump 300 is connected to the inlets 110 of the three electrolytic cells 100; , there may be two first power pumps 300, and the first liquid outlet ends 320 of these two first power pumps 300 may be respectively connected to the inlets 110 of two of the electrolytic cells 100; when there are four electrolytic cells 100, there may be two first power pumps 300, and the first liquid outlet ends 320 of one of the first power pumps 300 may be respectively connected to the inlets 110 of two of the electrolytic cells 100, and the first liquid outlet ends 320 of the other first power pump 300 may be respectively connected to the inlets 110 of the other two electrolytic cells 100. The inlet 110 of the electrolytic cell 100 can be provided with one, and the inlet 110 of the electrolytic cell 100 can be connected to a tee, the tee includes a main pipe connected to the inlet 110 of the electrolytic cell 100, a first branch pipe connected to the first power pump 300, and a second branch pipe connected to the second power pump 400, and the first branch pipe is also connected to the main pipe, and the second branch pipe is also connected to the main pipe. The flowmeter 500 can be provided on the second branch pipe or on the main pipe, and the regulating valve 600 can be provided on the first branch pipe or the main pipe; when the regulating valve 600 is provided on the first branch pipe and the flowmeter 500 is provided on the second branch pipe, the regulating valve 600 is provided in parallel with the flowmeter 500, and when at least one of the flowmeter 500 or the regulating valve 600 is provided on the main pipe, the flowmeter 500 and the regulating valve 600 are provided in series.Alternatively, the inlet 110 of the electrolytic cell 100 can be provided with two, namely a first port and a second port, wherein the first port is used to communicate with the first liquid outlet 320 of the first power pump 300, and the regulating valve 600 can be arranged between the first liquid outlet 320 and the first port; the second port is used to communicate with the second liquid outlet 420 of the second power pump 400, and the flowmeter 500 is arranged between the second port and the second liquid outlet 420 of the second power pump 400. At this time, the regulating valve 600 and the flowmeter 500 are arranged in parallel.
[0049] The technical solution of the present application is to connect the inlet 210 of the gas-liquid separator module to the outlet 120 of the electrolytic cell 100, connect the first liquid inlet end 310 of the first power pump 300 to the liquid discharge port 220 of the gas-liquid separation module 200, and connect the first liquid outlet end 320 of the first power pump 300 to the inlet 110 of at least two electrolytic cells 100. On the one hand, the mixture carrying part of the electrolyte produced by the electrolytic cell 100 enters the gas-liquid separation module 200 for gas-liquid separation, and the electrolyte carried can flow back to the electrolytic cell 100 through the first power pump 300; on the other hand, at least two electrolytic cells are connected. The cell 100 can be allocated the operating load of one first power pump 300, thereby allowing the electrolyte flow through one first power pump 300 to flow to at least two electrolytic cells 100 separately, reducing the electrolyte flow rate of each electrolytic cell 100, thereby allowing the electrolytic cell 100 to adapt to a lower power operating state. When the electrolytic cell 100 is in a low-power operating state, the gas purity is higher, improving gas utilization, reducing the risk of resource waste caused by gas venting, and also overcoming the minimum workload limit of the first power pump 300, thereby increasing the service life of the first power pump 300. In addition, by providing a regulating valve 600 on the pipeline between the inlet 110 and the first liquid outlet 320 of at least one electrolytic cell 100, the flow rate at the inlet 110 connected thereto can be adjusted by the regulating valve 600, thereby improving the accuracy of regulating the flow rate of the electrolyte flowing into each electrolytic cell 100. By setting up a second power pump 400, and the second liquid inlet end 410 of the second power pump 400 is connected to the discharge port 220, and the second liquid outlet end 420 of the second power pump 400 is connected to the inlet 110 of an electrolyzer 100, the hydrogen production system in the present application can be in a normal power operation state. The electrolyte separated by the gas-liquid separation module 200 can be pumped into the electrolyzer 100 by the second power pump 400, and the flow rate of the electrolyte entering each electrolyzer 100 can be increased, thereby improving the heat dissipation effect of the electrolyzer 100.
[0050] Please refer to Figures 1 to 4 In some embodiments of the present application, at least one flow meter 500 and a regulating valve 600 are arranged in series between the first liquid outlet 320 and the corresponding inlet 110 .
[0051] By arranging the flow meter 500 and the regulating valve 600 in series between the first liquid outlet 320 and the corresponding inlet 110, the flow meter 500 can monitor the flow at the inlet 110 connected to the second power pump 400 when it is turned on, and can also monitor the flow through the regulating valve 600 of the first power pump 300 and the inlet 110 connected to the regulating valve 600 in a low-power operating state, that is, when the first power pump 300 is turned on, thereby facilitating the adjustment of the opening of the regulating valve 600, and further more accurately adjusting the flow of the electrolyte through the regulating valve 600 and the flow of the electrolyte at the inlet 110 connected to the regulating valve 600.
[0052] Specifically, in order to achieve the effect of at least one flow meter 500 and a regulating valve 600 being arranged in series between the first liquid outlet 320 and the corresponding inlet 110, in one example, the inlet 110 of the electrolytic cell 100 can be connected to a tee pipe, and the tee pipe includes a main pipe connected to the inlet 110 of the electrolytic cell 100, a first branch pipe connected to the first power pump 300, and a second branch pipe connected to the second power pump 400, and the first branch pipe is also connected to the main pipe, and the second branch pipe is also connected to the main pipe, the regulating valve 600 is arranged on the first branch pipe, and the flow meter 500 is arranged on the main pipe; or the regulating valve 600 is arranged on the main pipe, and the flow meter 500 is arranged on the second branch pipe.
[0053] Please refer to Figures 1 to 4 Furthermore, one end of the regulating valve 600 is connected to the first liquid outlet 320 , and the other end of the regulating valve 600 is connected to the pipeline between the flow meter 500 and the second liquid outlet 420 .
[0054] By connecting one end of the regulating valve 600 to the first liquid outlet 320 and the other end to the pipeline between the flow meter 500 and the second liquid outlet 420, the hydrogen production system can be operated in a normal power state by simply shutting down the first power pump 300 without adjusting the opening of the regulating valve 600. This reduces the impact on the flow of electrolyte from the second power pump 400 through the flow meter 500 and then into the electrolyzer 100. With this arrangement, the regulating valve 600 has a small impact on the flow of electrolyte entering the electrolyzer 100 under normal power operation. In addition, under low power operation, that is, when the second power pump 400 is shut down and the first power pump 300 is turned on, the flow meter 500 can also monitor the flow through the regulating valve 600, thereby facilitating real-time adjustment of the opening of the regulating valve 600 to achieve the effect of real-time regulation of the flow of electrolyte entering the electrolyzer 100.
[0055] Please refer to Figures 1 to 4 In some embodiments of the present application, a flow meter 500 and a regulating valve 600 are electrically connected and arranged in series between the first liquid outlet 320 and the corresponding inlet 110 .
[0056] By electrically connecting the flow meter 500 and the regulating valve 600 which are arranged in series between the first liquid outlet 320 and the corresponding inlet 110, the opening of the regulating valve 600 can be automatically controlled by the flow monitored by the flow meter 500 under low-power operation, thereby achieving the effect of automatically adjusting the flow of the electrolyte entering the electrolytic cell 100, without the need for manual adjustment of the opening of the regulating valve 600, which is conducive to achieving the automation effect of the hydrogen production system.
[0057] Please refer to Figures 1 to 4 In some embodiments of the present application, the hydrogen production system further includes a first control valve 710 , which is connected in series with the first power pump 300 .
[0058] By connecting the first control valve 710 in series with the first power pump 300, the opening or closing of the first power pump 300 can be controlled by the first control valve 710, thereby reducing the situation of manually opening or closing the first power pump 300, which is conducive to achieving the effect of automatically controlling the opening or closing of the first power pump 300.
[0059] Please refer to Figures 1 to 4 In some embodiments of the present application, the hydrogen production system further includes a second control valve 720 , which is connected in series with the second power pump 400 .
[0060] By connecting the second control valve 720 in series with the second power pump 400, the second control valve 720 can be used to control the opening or closing of the second power pump 400, thereby reducing the situation of manually opening or closing the second power pump 400, which is conducive to achieving the effect of automatically controlling the opening or closing of the second power pump 400.
[0061] Please refer to Figures 1 to 4 In some embodiments of the present application, the difference between the number of electrolytic cells 100 and the number of regulating valves 600 is no more than 1.
[0062] Specifically, when there are two electrolytic cells 100, one or two regulating valves 600 may be provided; when there are three electrolytic cells 100, two or three regulating valves 600 may be provided. By setting the difference between the number of electrolytic cells 100 and the number of regulating valves 600 to be no greater than 1, the flow rate of electrolyte entering each electrolytic cell 100 can be adjusted in a low-power operating state, and the accuracy of the flow rate of electrolyte entering each electrolytic cell 100 is improved.
[0063] Please refer to Figures 1 to 4 In some embodiments of the present application, the number of the first power pumps 300 is less than the number of the electrolytic cells 100 .
[0064] By setting the number of first power pumps 300 to be smaller than the number of second power pumps 400, the operating load of at least one first power pump 300 can be distributed to the two electrolytic cells 100 respectively, thereby reducing the flow rate of electrolyte entering the electrolytic cell 100 under low-power operation, thereby improving the gas purity.
[0065] Please refer to Figures 1 to 4 In some embodiments of the present application, at least two second power pumps 200 are provided.
[0066] Specifically, when there are at least two second power pumps 200, the number of the second power pumps 200 may be equal to the number of the electrolytic cells 100, or may be less than the number of the electrolytic cells 100. Figure 1 or Figure 2 As shown, the number of the second power pumps 200 is less than the number of the electrolytic cells 100; Figure 3 or Figure 4 As shown, the number of the second power pumps 200 is greater than the number of the electrolytic cells 100 .
[0067] By providing at least two second power pumps 200 , the electrolyte flow rate entering each electrolytic cell 100 can be increased, thereby increasing the upper limit of the workload.
[0068] Please refer to Figure 5 and Figure 6 In some embodiments of the present application, the hydrogen production system further includes a switch valve 800 , which is arranged in parallel with the regulating valve 600 .
[0069] It is understandable that the upper and lower limit values of the regulating valve 600 are both related to the diameter of the regulating valve 600 itself. By setting the switch valve 800 in parallel, the hydrogen production system can make the switch valve 800 in an open state when it is in a normal working state, and the regulating valve 600 can be in a closed state at the same time, thereby ensuring that the flow rate of the electrolyte flowing back to the electrolyzer 100 is large, and the flow rate of the electrolyte will not be affected by the small diameter of the regulating valve 600 itself. When the hydrogen production system is in a low operating state, a regulating valve 600 with a smaller diameter can be selected, that is, the diameter of the regulating valve 600 is smaller than the diameter of the switch valve 800. At this time, the switch valve 800 can be closed and the regulating valve 600 can be opened, thereby facilitating the regulation of the electrolyte flow through it by the regulating valve 600.
[0070] In some embodiments of the present application, the gas-liquid separation module 200 includes a hydrogen separator and an oxygen separator, and the hydrogen separator and the oxygen separator are arranged in parallel.
[0071] By making the gas-liquid separation module 200 include a hydrogen separator and an oxygen separator, and arranging the hydrogen separator and the oxygen separator in parallel, the hydrogen separator and the oxygen separator can respectively perform gas-liquid separation on the mixture of hydrogen and electrolyte and the mixture of oxygen and electrolyte, thereby facilitating the purification of both hydrogen and oxygen.
[0072] Specifically, the hydrogen separator has a hydrogen inlet 210 and a first liquid drain port 220, the oxygen separator has an oxygen inlet 210 and a second liquid drain port 220, and the outlet 120 of the electrolyzer 100 includes a hydrogen outlet 120 and an oxygen outlet 120. The hydrogen inlet 210 and the oxygen inlet 210 are respectively connected to the hydrogen outlet 120 and the oxygen outlet 120 of the electrolyzer 100. The first liquid drain port 220 and the second liquid drain port 220 can both be connected to the first liquid inlet end 310 of the first power pump 300, and can also be connected to the second liquid inlet end 410 of the second power pump 400.
[0073] Please refer to Figures 1 to 4 In some embodiments of the present application, the gas-liquid separation module 200 further includes an exhaust port 230 , and the hydrogen production system further includes a gas purification unit 900 , which is connected to the exhaust port 230 .
[0074] The gas purification unit 900 includes a degassing tower, a dryer, and other components, and is a unit for further purifying the generated hydrogen or oxygen. It should be noted that the gas purification unit 900 is a technology well known to those skilled in the art and will not be described in detail here.
[0075] By connecting the gas purification unit 900 to the exhaust port 230 , the gas can be further purified to obtain clean gas.
[0076] The above description is merely an exemplary embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.
Claims
1. A hydrogen production system, characterized in that: include: at least two electrolytic cells, each having an inlet and an outlet; A gas-liquid separation module, the gas-liquid separation module having an inlet and a liquid discharge port, the inlet being in communication with the outlet; a first power pump, the first power pump having a first liquid inlet and a first liquid outlet, the first liquid inlet being connected to the liquid discharge port, and the first liquid outlet being connected to the inlets of at least two of the electrolytic cells; a second power pump, the second power pump having a second liquid inlet and a second liquid outlet, the second liquid inlet being connected to the liquid discharge port, and the second liquid outlet being connected to the inlet of the electrolytic cell; a flow meter, the flow meter being provided on the pipeline between the second liquid outlet and the corresponding inlet; and A regulating valve is provided on the pipeline between the inlet and the first liquid outlet of at least one electrolytic cell.
2. The hydrogen production system according to claim 1, characterized in that: At least one flow meter and the regulating valve are arranged in series between the first liquid outlet and the corresponding inlet.
3. The hydrogen production system according to claim 2, characterized in that: One end of the regulating valve is connected to the first liquid outlet, and the other end of the regulating valve is connected to a pipeline between the flow meter and the second liquid outlet.
4. The hydrogen production system according to claim 2, characterized in that: The flow meter, which is arranged in series between the first liquid outlet and the corresponding inlet, is electrically connected to the regulating valve.
5. The hydrogen production system according to claim 1, wherein: The hydrogen production system further comprises: a first control valve, the first control valve being connected in series with the first power pump; and / or, A second control valve is connected in series with the second power pump.
6. The hydrogen production system according to claim 1, wherein: The difference between the number of the electrolytic cells and the number of the regulating valves is no more than 1.
7. The hydrogen production system according to claim 1, wherein: The number of the first power pumps is less than the number of the electrolytic cells; And / or, there are at least two second power pumps.
8. The hydrogen production system according to any one of claims 1 to 7, characterized in that: The hydrogen production system further includes a switch valve, which is arranged in parallel with the regulating valve.
9. The hydrogen production system according to any one of claims 1 to 7, characterized in that: The gas-liquid separation module includes a hydrogen separator and an oxygen separator, and the hydrogen separator and the oxygen separator are arranged in parallel.
10. The hydrogen production system according to any one of claims 1 to 7, characterized in that: The gas-liquid separation module further includes an exhaust port, and the hydrogen production system further includes a gas purification unit, which is connected to the exhaust port.