Water electrolysis hydrogen production device

Abstract

The utility model discloses a water electrolysis hydrogen production device which comprises a first regulating valve and a second regulating valve, the first regulating valve is arranged on a first pipeline and used for balancing the liquid level of a hydrogen separator on the hydrogen production side of an electrolytic bath and the liquid level of an oxygen separator on the oxygen production side of the electrolytic bath; the second regulating valve is arranged on the second pipeline and is used for regulating the pressure of the oxygen separator; the first pipeline is configured as a connecting pipeline between the hydrogen separator and the downstream hydrogen side washer; and the second pipeline is configured as a connecting pipeline between the oxygen separator and an oxygen side scrubber at the downstream of the oxygen separator. According to the water electrolysis hydrogen production device, the distance between the first / second regulating valve and the corresponding separator is greatly shortened, so that the response capability of the first / second regulating valve is higher, the stable operation of the water electrolysis hydrogen production device can be ensured, and the water electrolysis hydrogen production device can be coupled with renewable energy sources to realize flexible hydrogen production.

Description

Technical Field

[0001] The utility model relates to the technical field of water electrolysis hydrogen production, and more specifically to a water electrolysis hydrogen production device. Background Art

[0002] In the existing water electrolysis hydrogen production process, the pressure and liquid level regulating valve adjusts the pressure and liquid level balance of the hydrogen and oxygen separators at the end of the gas-liquid processing unit. There are scrubbers, coolers, separators and other equipment between the regulating valve and the corresponding hydrogen / oxygen separator, and the pressure and liquid level signals cannot be detected quickly. As a result, there are fluctuations in the pressure and liquid level difference in the device during the control process, which makes the entire water electrolysis hydrogen production device unable to operate stably, and is even not conducive to the purity and efficiency of hydrogen production, especially under variable power operating conditions, which is not conducive to the realization of flexible hydrogen production. Among them, flexible hydrogen production means that when the working parameters change, such as power, temperature, flow rate and other parameters, the water electrolysis hydrogen production device can still operate smoothly, for example, the system pressure and the liquid level balance control of the hydrogen separator and the oxygen separator are stable.

[0003] Therefore, how to solve the problem that the electrolysis water hydrogen production device has poor operating stability and is not conducive to flexible hydrogen production has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0004] In view of this, the utility model provides a water electrolysis hydrogen production device to solve the problem that the water electrolysis hydrogen production device has poor operating stability and is not conducive to flexible hydrogen production.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model discloses a device for producing hydrogen by electrolyzing water, comprising:

[0007] A first regulating valve is provided in the first pipeline and is used to balance the liquid levels of a hydrogen separator on the hydrogen production side of the electrolyzer and an oxygen separator on the oxygen production side of the electrolyzer;

[0008] a second regulating valve, disposed in the second pipeline and used for regulating the pressure of the oxygen separator;

[0009] Wherein, the first pipeline is configured as a connecting pipeline between the hydrogen separator and the hydrogen-side scrubber downstream thereof; the second pipeline is configured as a connecting pipeline between the oxygen separator and the oxygen-side scrubber downstream thereof.

[0010] Optionally, the hydrogen separator is provided with a first liquid level transmitter, and the oxygen separator is provided with a second liquid level transmitter; the first regulating valve is respectively connected to the first liquid level transmitter and the second liquid level transmitter signals to adjust the opening according to the electrical signals given by the first liquid level transmitter and the second liquid level transmitter.

[0011] Optionally, the oxygen separator is provided with a pressure transmitter, and the second regulating valve is connected to the pressure transmitter signal to adjust the opening according to the electrical signal provided by the pressure transmitter.

[0012] Optionally, a first water separator is further provided on the first pipeline, and the first water separator is located between the first regulating valve and the hydrogen separator.

[0013] Optionally, the first water separator is configured as a cooler or a gas-water separator.

[0014] Optionally, the first water remover has a first liquid phase outlet, and the first liquid phase outlet is connected to the hydrogen separator through a first reflux pipeline.

[0015] Optionally, a second water separator is further provided on the second pipeline, and the second water separator is located between the second regulating valve and the oxygen separator.

[0016] Optionally, the second water separator is configured as a cooler or a gas-water separator.

[0017] Optionally, the second water remover has a second liquid phase outlet, and the second liquid phase outlet is connected to the oxygen separator through a second reflux pipeline.

[0018] Optionally, a hydrogen side water collector is also provided on the hydrogen production side, and the hydrogen side water collector is used to collect the liquid phase produced by the hydrogen side scrubber and the first gas-water separator downstream thereof; the hydrogen side water collector is connected to the hydrogen separator through a third reflux pipeline, and a first reflux pump is provided on the third reflux pipeline, and a third liquid level transmitter is provided on the hydrogen side water collector, and the first reflux pump is signal-connected to the third liquid level transmitter.

[0019] Optionally, an oxygen side water collector is also provided on the oxygen production side, and the oxygen side water collector is used to collect the liquid phase produced by the oxygen side scrubber and the second gas-water separator downstream thereof; the oxygen side water collector is connected to the oxygen separator through a fourth reflux pipeline, a second reflux pump is provided on the fourth reflux pipeline, a fourth liquid level transmitter is provided on the oxygen side water collector, and the second reflux pump is signal-connected to the fourth liquid level transmitter.

[0020] Compared with the background technology introduction, the above-mentioned water electrolysis hydrogen production device includes a first regulating valve and a second regulating valve, wherein the first regulating valve is arranged in the first pipeline, and is used to balance the liquid levels of the hydrogen separator on the hydrogen production side of the electrolyzer and the oxygen separator on the oxygen production side of the electrolyzer; the second regulating valve is arranged in the second pipeline, and is used to adjust the pressure of the oxygen separator; and the first pipeline is configured as a connecting pipeline between the hydrogen separator and the hydrogen side scrubber downstream thereof; the second pipeline is configured as a connecting pipeline between the oxygen separator and the oxygen side scrubber downstream thereof. In the actual application process of the water electrolysis hydrogen production device, by designing the first regulating valve on the first pipeline, and the first pipeline is configured as a connecting pipeline between the hydrogen separator on the hydrogen production side of the electrolyzer and the hydrogen side scrubber downstream thereof, the distance between the first regulating valve and the corresponding hydrogen separator is greatly shortened, so that the first regulating valve has a stronger response capability. Once the liquid level imbalance between the hydrogen separator and the oxygen separator is detected, the opening of the first regulating valve can be quickly adjusted to restore the liquid level of the hydrogen separator and the oxygen separator to a balance; similarly, by designing the second regulating valve on the second pipeline, and the second pipeline is configured as a connecting pipeline between the oxygen separator on the oxygen production side of the electrolyzer and the oxygen side scrubber downstream thereof, the distance between the second regulating valve and the corresponding oxygen separator is greatly shortened, so that the second regulating valve has a stronger response capability. Once the pressure deviation of the oxygen separator is detected, the opening of the second regulating valve can be quickly adjusted to restore the pressure in the oxygen separator to a set value, thereby ensuring the smooth operation of the water electrolysis hydrogen production device, which is conducive to coupling with renewable energy to achieve flexible hydrogen production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the first structure of a water electrolysis hydrogen production device provided in an embodiment of the utility model;

[0023] Figure 2 A second structural schematic diagram of a water electrolysis hydrogen production device provided in an embodiment of the utility model;

[0024] Figure 3 A second structural schematic diagram of the water electrolysis hydrogen production device provided in an embodiment of the utility model.

[0025] in, Figure 1-Figure 3 middle:

[0026] 1-Electrolyzer;

[0027] 2- Hydrogen separator;

[0028] 3- oxygen separator;

[0029] 4-First dewatering device;

[0030] 5- Second dewatering device;

[0031] 6- Hydrogen side scrubber;

[0032] 7-oxygen side scrubber;

[0033] 8- Hydrogen side water collector;

[0034] 9- oxygen side water collector;

[0035] 10-first gas-water separator;

[0036] 11- second gas-water separator;

[0037] 12-lye pump;

[0038] 13-alkali solution heat exchanger;

[0039] 14- first regulating valve;

[0040] 15- second regulating valve;

[0041] 16-first switch valve;

[0042] 17- second switch valve;

[0043] 18-first liquid level transmitter;

[0044] 19- Second level transmitter;

[0045] 20-pressure transmitter;

[0046] 21- third liquid level transmitter;

[0047] 22- fourth liquid level transmitter;

[0048] 23- first reflux pump;

[0049] 24- second reflux pump;

[0050] 25-Hydrogen heat exchanger;

[0051] 26-Oxygen heat exchanger. DETAILED DESCRIPTION

[0052] The core of the utility model is to provide a water electrolysis hydrogen production device to solve the problem that the water electrolysis hydrogen production device has poor operating stability and is not conducive to flexible hydrogen production.

[0053] 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 in 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.

[0054] Reference Figure 1-Figure 3 As shown, the utility model provides a water electrolysis hydrogen production device, including a first regulating valve 14 and a second regulating valve 15, wherein the first regulating valve 14 is arranged in the first pipeline, and is used to balance the liquid levels of the hydrogen separator 2 on the hydrogen production side of the electrolyzer 1 and the oxygen separator 3 on the oxygen production side of the electrolyzer 1; the second regulating valve 15 is arranged in the second pipeline, and is used to adjust the pressure of the oxygen separator 3; and the first pipeline is configured as a connecting pipeline between the hydrogen separator 2 and the hydrogen side scrubber 6 downstream thereof; the second pipeline is configured as a connecting pipeline between the oxygen separator 3 and the oxygen side scrubber 7 downstream thereof.

[0055] In actual application, the electrolytic water hydrogen production device greatly shortens the distance between the first regulating valve 14 and its corresponding hydrogen separator 2 by designing the first regulating valve 14 on the first pipeline, and the first pipeline is configured as a connecting pipeline between the hydrogen separator 2 on the hydrogen production side of the electrolyzer 1 and the hydrogen side scrubber 6 downstream thereof, so that the response capability of the first regulating valve 14 is stronger. Once the liquid level imbalance of the hydrogen separator 2 and the oxygen separator 3 is detected, the opening of the first regulating valve 14 can be quickly adjusted to restore the liquid level balance of the hydrogen separator 2 and the oxygen separator 3. Similarly, By designing the second regulating valve 15 on the second pipeline, and configuring the second pipeline as a connecting pipeline between the oxygen separator 3 on the oxygen production side of the electrolyzer 1 and the oxygen side scrubber 7 downstream thereof, the distance between the second regulating valve 15 and its corresponding oxygen separator 3 is greatly shortened, making the response capability of the second regulating valve 15 stronger. Once a pressure deviation of the oxygen separator 3 is detected, the opening of the second regulating valve 15 can be quickly adjusted to restore the pressure in the oxygen separator 3 to the set value, thereby ensuring the smooth operation of the water electrolysis hydrogen production device, which is conducive to coupling with renewable energy to achieve flexible hydrogen production.

[0056] It should be noted that those skilled in the art should be able to understand that flexible hydrogen production means that when the operating parameters, such as power, temperature, flow rate and other parameters, change, the water electrolysis hydrogen production device can still operate smoothly, for example, the system pressure, the liquid level balance control of the hydrogen separator 2 and the oxygen separator 3 are stable.

[0057] It should also be noted that the specific structural type of the above-mentioned electrolytic cell 1 is not limited, and it can specifically be alkaline water electrolysis to produce hydrogen, proton exchange membrane water electrolysis, high-temperature solid oxide water electrolysis or solid polymer anion exchange membrane water electrolysis.

[0058] Taking the production of hydrogen by alkaline water electrolysis as an example, when the electrolyzer 1 performs water electrolysis, it corresponds to a hydrogen production side and an oxygen production side, wherein the gas-liquid mixture produced by the outlet of the electrolyzer corresponding to the hydrogen production side needs to pass through the hydrogen separator 2 for gas-liquid separation, and the liquid phase outlet of the hydrogen separator 2 (corresponding to the alkaline water electrolysis hydrogen production type, the main component flowing out is alkali liquid) is connected to the return liquid port of the electrolyzer 1 through an alkali liquid circulation pipeline, and the alkali liquid circulation pipeline can be designed with alkali liquid pump 12 and alkali liquid heat exchanger 13 and other related components, the gas phase outlet of the hydrogen separator 2 is connected to the hydrogen side scrubber 6, and the hydrogen side scrubber 6 should be connected to a corresponding water replenishment mechanism, which can specifically include a water supply source for supplying pure water, and the water supply source supplies pure water to the hydrogen side scrubber 6 through a pipeline and a water pump, and the corresponding pipeline can be arranged with a first water replenishment valve, through which the first water replenishment valve can be adjusted to enter the hydrogen side scrubber 6 The amount of pure water inside, the water replenishment mechanism is preferably connected to the top position of the hydrogen side scrubber 6, where the top position refers to the top surface of the hydrogen side scrubber 6 or a position close to the top surface. By designing it into this structural form, pure water flows downward from its upper part and countercurrently contacts the gas phase inside the hydrogen side scrubber 6, which greatly improves the washing efficiency of the gas phase. When the hydrogen side scrubber 6 is used to wash the gas phase material, corresponding to the alkaline electrolysis of water to produce hydrogen type, the main function of washing is to wash away alkaline substances such as alkali solution. After washing by the hydrogen side scrubber 6, the gas phase material generally needs to enter the first gas-water separator 10 for gas-water separation to remove water from the gas phase material. The gas phase material after passing through the first gas-water separator 10 can be transported to downstream process equipment (such as a purification device, etc.) through a crude hydrogen transport pipeline (which is generally designed with a corresponding first switch valve 16). Among them, the corresponding hydrogen side scrubber 6 and the first gas-water separator 10 can be designed to refer to Figure 1 and Figure 3 In the manner shown, a hydrogen heat exchanger 25 is designed between the two, which can also be called a cooler. Its main purpose is to cool the gas phase material produced by the hydrogen side scrubber 6, and a certain amount of water can be removed in the process; of course, the hydrogen side scrubber 6 and the first gas-water separator 10 can also be designed as a reference Figure 2 In the manner shown, no hydrogen heat exchanger 25 is provided between the two. In actual application, the configuration can be selected according to actual needs, and no further specific limitation is made here.

[0059] Similarly, the gas-liquid mixture produced by the outlet of the electrolyzer corresponding to the oxygen production side needs to pass through the oxygen separator 3 for gas-liquid separation. The liquid phase outlet of the oxygen separator 3 (when corresponding to the alkaline electrolysis of water to produce hydrogen, the main component flowing out is alkali liquid) is connected to the liquid return port of the electrolyzer 1 through an alkali liquid circulation pipeline. The alkali liquid circulation pipeline can be designed with alkali liquid pump 12 and alkali liquid heat exchanger 13 and other related components. Among them, the liquid phase outlet of the hydrogen separator 2 and the liquid phase outlet of the oxygen separator 3 can share a set of alkali liquid circulation pipelines, which helps to simplify the structure. Of course, two sets of independent alkali liquid circulation pipelines can also be used. The gas phase outlet of the oxygen separator 3 is connected to the oxygen side scrubber 7, and the oxygen side scrubber 7 should be connected to a corresponding water replenishment mechanism. The water replenishment mechanism can specifically include a water supply source for supplying pure water, and the water supply source supplies pure water to the oxygen through pipelines and water pumps. Side scrubber 7, and the corresponding pipeline can be arranged with a second water replenishment valve, through which the amount of pure water entering the oxygen side scrubber 7 can be adjusted. The water replenishment mechanism is preferably connected to the top position of the oxygen side scrubber 7, and the top position here refers to the top surface of the oxygen side scrubber 7 or a position close to the top surface. By designing it into this structural form, pure water flows downward from its upper part and countercurrently contacts with the gas phase inside the oxygen side scrubber 7, which greatly improves the washing efficiency of the gas phase. When the oxygen side scrubber 7 is used to wash the gas phase material, corresponding to the alkaline electrolysis of water to produce hydrogen type, the washing function is mainly to wash away alkaline substances such as alkali solution. Among them, the hydrogen side scrubber 6 and the oxygen side scrubber 7 can share a set of water replenishment mechanism, which helps to simplify the structure. Of course, two independent water replenishment mechanisms can also be used, and no more specific restrictions are made here. In addition, the gas phase material after being washed by the oxygen side scrubber 7 generally needs to enter the second gas-water separator 11 for gas-water separation to remove water in the gas phase material. The gas phase material after passing through the second gas-water separator 11 can be transported to downstream process equipment (such as a purification device, etc.) through a crude oxygen transport pipeline (which is generally designed with a corresponding second switch valve 17) or directly discharged. Among them, the space between the corresponding oxygen side scrubber 7 and the second gas-water separator 11 can be designed as a reference Figure 1 and Figure 3 In the manner shown, an oxygen heat exchanger 26 is designed between the two, which can also be called a cooler. Its main purpose is to cool the gas phase material produced by the oxygen side scrubber 7, and a certain amount of water can be removed in the process; of course, the oxygen side scrubber 7 and the second gas-water separator 11 can also be designed as a reference Figure 2 In the manner shown, no oxygen heat exchanger 26 is provided between the two. In actual application, the configuration can be selected according to actual needs, and no further specific limitation is made here.

[0060] In some specific embodiments, reference Figure 1-Figure 3The above-mentioned hydrogen separator 2 can be provided with a first liquid level transmitter 18, which is mainly used to detect the liquid level information in the hydrogen separator 2, and the oxygen separator 3 is provided with a second liquid level transmitter 19, which is mainly used to detect the liquid level information in the oxygen separator 3; the first regulating valve 14 is respectively connected to the first liquid level transmitter 18 and the second liquid level transmitter 19 by signal, so as to adjust the opening according to the electrical signals given by the first liquid level transmitter 18 and the second liquid level transmitter 19, so as to adjust the liquid level in the hydrogen separator 2, and finally make the liquid level in the hydrogen separator 2 and the liquid level in the oxygen separator 3 in a balanced state.

[0061] In some specific embodiments, reference Figure 1-Figure 3 The oxygen separator 3 may be provided with a pressure transmitter 20, which is mainly used to detect the pressure information in the oxygen separator 3. The second regulating valve 15 is connected to the pressure transmitter 20 by signal to adjust the opening according to the electrical signal given by the pressure transmitter 20, so that the pressure value in the oxygen separator 3 can be maintained within the required setting range, thereby avoiding excessive pressure deviation.

[0062] In some other specific embodiments, referring to Figure 2 and Figure 3 , the first pipeline may also be provided with a first water remover 4, and the first water remover 4 is located upstream of the first regulating valve 14, that is, between the first regulating valve 14 and the hydrogen separator 2. By providing the first water remover 4 between the first regulating valve 14 and the corresponding hydrogen separator 2, the liquid content of the gas phase entering the first regulating valve 14 can be reduced, thereby ensuring the regulating performance of the first regulating valve 14. Among them, the first water remover 4 can be specifically configured as follows Figure 2 The structure of the cooler (ie, heat exchanger) shown in FIG. 1 may also be configured as follows: Figure 3 The structure of the gas-water separator shown, or other equipment with a water removal function known to those skilled in the art, can be used as long as the water removal function can be achieved.

[0063] In a further embodiment, referring to Figure 2 and Figure 3 The first water remover 4 may have a first liquid phase outlet, which may be connected to the hydrogen separator 2 through a first reflux pipeline. This design enables the first water remover 4 to obtain a liquid phase and reflux it back to the corresponding hydrogen separator 2, which is beneficial to energy regeneration.

[0064] Similarly, refer to Figure 2 and Figure 3, a second dehumidifier 5 may also be provided on the second pipeline, and the second dehumidifier 5 is located upstream of the second regulating valve 15, that is, between the second regulating valve 15 and the oxygen separator 3. By providing the second dehumidifier 5 between the second regulating valve 15 and the corresponding oxygen separator 3, the liquid content of the gas phase entering the second regulating valve 15 can be reduced, thereby ensuring the regulating performance of the second regulating valve 15. Among them, the second dehumidifier 5 can be specifically configured as follows Figure 2 The structure of the cooler (ie, heat exchanger) shown in FIG. 1 may also be configured as follows: Figure 3 The structure of the gas-water separator shown, or other equipment with a water removal function known to those skilled in the art, can be used as long as the water removal function can be achieved.

[0065] For further trial plans, refer to Figure 2 and Figure 3 The second water remover 5 may have a second liquid phase outlet, which is connected to the oxygen separator 3 through a second reflux pipeline. This design enables the second water remover 5 to obtain liquid phase and reflux it to the corresponding oxygen separator 3, which is beneficial to energy regeneration.

[0066] In some other specific embodiments, referring to Figure 1-Figure 3 A hydrogen side water collector 8 can also be provided on the hydrogen production side, and the hydrogen side water collector 8 is used to collect the liquid phase produced by the hydrogen side scrubber 6 and the first gas-water separator 10 downstream thereof; the hydrogen side water collector 8 is connected to the hydrogen separator 2 through a third reflux pipeline, and a first reflux pump 23 is provided on the third reflux pipeline. A third liquid level transmitter 21 is provided on the hydrogen side water collector 8, and the third liquid level transmitter 21 is mainly used to detect the liquid level in the hydrogen side water collector 8. The first reflux pump 23 is connected to the third liquid level transmitter 21 by signal, so that the first reflux pump 23 can control a reasonable reflux speed according to the set value of the third liquid level transmitter 21, and the liquid phase of the hydrogen side scrubber 6 and the first gas-water separator 10 collected in the hydrogen side water collector 8 is pumped back into the hydrogen separator 2, so as to avoid the discharge of waste liquid from the water electrolysis hydrogen production device and contribute to energy recycling.

[0067] Similarly, refer to Figure 1-Figure 3An oxygen side water collector 9 can also be provided on the oxygen production side. The oxygen side water collector 9 is used to collect the liquid phase produced by the oxygen side scrubber 7 and the second gas-water separator 11 downstream thereof; the oxygen side water collector 9 is connected to the oxygen separator 3 through a fourth reflux pipeline, and a second reflux pump 24 is provided on the fourth reflux pipeline. A fourth liquid level transmitter 22 is provided on the oxygen side water collector 9. The fourth liquid level transmitter 22 is mainly used to detect the liquid level in the oxygen side water collector 9. The second reflux pump 24 is connected to the fourth liquid level transmitter 22 signal so that the second reflux pump 24 can control a reasonable reflux speed according to the set value of the fourth liquid level transmitter 22, and the liquid phase of the oxygen side scrubber 7 and the second gas-water separator 11 collected in the oxygen side water collector 9 is pumped back into the oxygen separator 3, so as to avoid the discharge of waste liquid from the water electrolysis hydrogen production device and contribute to energy recycling.

[0068] It should be noted that the above-mentioned water electrolysis hydrogen production device can be used for independent hydrogen production, and the second switch valve 17 on the crude oxygen delivery pipeline on the corresponding oxygen production side can be directly vented, and due to the design of the oxygen side water collector 9, there will be no liquid backflow from the venting outlet. In addition, when the oxygen is vented, the corresponding related equipment and components on the oxygen production side, such as the second regulating valve 15 and the subsequent oxygen side scrubber 7, the second gas-water separator 11, and the oxygen side water collector 9 can use low-pressure equipment, thereby reducing the manufacturing cost of the equipment. Of course, the water electrolysis hydrogen production device can also be used for simultaneous oxygen production while producing hydrogen, and at this time, the corresponding downstream process equipment can be connected to the corresponding crude oxygen delivery pipeline.

[0069] In order for those skilled in the art to better understand the water electrolysis hydrogen production device provided by the utility model, a brief description is given below in conjunction with the specific working process:

[0070] Reference Figure 1-Figure 3The hydrogen and alkali liquid mixture and the oxygen and alkali liquid mixture generated by the electrolysis reaction in the electrolytic cell 1 enter the hydrogen separator 2 and the oxygen separator 3 respectively. The hydrogen and oxygen obtained after gas-liquid phase separation pass through the first regulating valve 14 and the second regulating valve 15 respectively, wherein the first regulating valve 14 controls the liquid level balance of the first liquid level transmitter 18 and the second liquid level transmitter 19, and the second regulating valve 15 controls the pressure transmitter 20 at the top of the oxygen separator 3 to the set value; the hydrogen coming out of the first regulating valve 14 enters the hydrogen scrubber 6 for washing and de-alkali, and then passes through the subsequent first dehydrator 4 and the first gas-water separator 10 for cooling and separation, and then leaves from the first switch valve 16 to the downstream (discharged or entering the purification device), and finally obtains crude hydrogen, wherein the liquid in the hydrogen scrubber 6 and the first gas-water separator 10 is The liquid phase flows into the hydrogen water collector 8, and the first reflux pump 23 is controlled by setting the set value of the third liquid level transmitter 21 to pump the collected liquid phase back into the hydrogen separator 2; similarly, the oxygen coming out of the second regulating valve 15 enters the oxygen scrubber 7 for washing and de-alkali, and then passes through the subsequent second dehydrator 5 and the second gas-water separator 11 for cooling and separation, and then leaves from the second switch valve 17 to the downstream (discharged or entering the purification device), and finally obtains crude oxygen, wherein the liquid phase in the oxygen scrubber 7 and the second gas-water separator 11 flows into the oxygen water collector 9, and the second reflux pump 24 is controlled by setting the set value of the fourth liquid level transmitter 22 to pump the collected liquid phase back into the oxygen separator 3; in addition, the device replenishes water through the water replenishment port to supplement pure water to the inside of the hydrogen side scrubber 6 and the oxygen side scrubber 7, and washes the gas. In combination with the entire solution, directly adjusting the liquid level balance and pressure of the hydrogen separator 2 and the oxygen separator 3 through the first regulating valve 14 and the second regulating valve 15 can make the adjustment response capability faster. Once the liquid level imbalance or pressure deviation of the separator is detected, the opening of the first regulating valve 14 and the second regulating valve 15 can be quickly adjusted to ensure the smooth operation of the device, so that the hydrogen production device can better resist the volatility of renewable energy variable power hydrogen production.

[0071] In addition, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0072] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0073] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0075] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A hydrogen production device by electrolysis of water, characterized in that: include: A first regulating valve (14) is arranged in the first pipeline and is used to balance the liquid levels of the hydrogen separator (2) on the hydrogen production side of the electrolyzer (1) and the oxygen separator (3) on the oxygen production side of the electrolyzer (1); a second regulating valve (15), arranged in the second pipeline and used for regulating the pressure of the oxygen separator (3); The first pipeline is configured as a connecting pipeline between the hydrogen separator (2) and the hydrogen side scrubber (6) downstream thereof; and the second pipeline is configured as a connecting pipeline between the oxygen separator (3) and the oxygen side scrubber (7) downstream thereof.

2. The water electrolysis hydrogen production device according to claim 1, characterized in that: The hydrogen separator (2) is provided with a first liquid level transmitter (18), and the oxygen separator (3) is provided with a second liquid level transmitter (19); the first regulating valve (14) is respectively connected to the first liquid level transmitter (18) and the second liquid level transmitter (19) by signals so as to adjust the opening according to the electrical signals provided by the first liquid level transmitter (18) and the second liquid level transmitter (19).

3. The water electrolysis hydrogen production device according to claim 1, characterized in that: The oxygen separator (3) is provided with a pressure transmitter (20), and the second regulating valve (15) is signal-connected to the pressure transmitter (20) so as to adjust the opening according to the electrical signal provided by the pressure transmitter (20).

4. The water electrolysis hydrogen production device according to claim 1, characterized in that: A first dehydrator (4) is also provided on the first pipeline, and the first dehydrator (4) is located between the first regulating valve (14) and the hydrogen separator (2).

5. The water electrolysis hydrogen production device according to claim 4, characterized in that: The first water separator (4) is configured as a cooler or a gas-water separator.

6. The water electrolysis hydrogen production device according to claim 4, characterized in that: The first water remover (4) has a first liquid phase outlet, and the first liquid phase outlet is connected to the hydrogen separator (2) through a first reflux pipeline.

7. The water electrolysis hydrogen production device according to claim 1, characterized in that: A second dehumidifier (5) is also provided on the second pipeline, and the second dehumidifier (5) is located between the second regulating valve (15) and the oxygen separator (3).

8. The water electrolysis hydrogen production device according to claim 7, characterized in that: The second water separator (5) is configured as a cooler or a gas-water separator.

9. The water electrolysis hydrogen production device according to claim 7, characterized in that: The second water remover (5) has a second liquid phase outlet, and the second liquid phase outlet is connected to the oxygen separator (3) through a second reflux pipeline.

10. The water electrolysis hydrogen production device according to claim 1, characterized in that: The hydrogen production side is also provided with a hydrogen side water collector (8), and the hydrogen side water collector (8) is used to collect the liquid phase produced by the hydrogen side scrubber (6) and the first gas-water separator (10) downstream thereof; the hydrogen side water collector (8) is connected to the hydrogen separator (2) through a third reflux pipeline, and a first reflux pump (23) is provided on the third reflux pipeline. A third liquid level transmitter (21) is provided on the hydrogen side water collector (8), and the first reflux pump (23) is signal-connected to the third liquid level transmitter (21).

11. The water electrolysis hydrogen production device according to claim 1, characterized in that: The oxygen production side is also provided with an oxygen side water collector (9), and the oxygen side water collector (9) is used to collect the liquid phase produced by the oxygen side scrubber (7) and the second gas-water separator (11) downstream thereof; the oxygen side water collector (9) is connected to the oxygen separator (3) through a fourth reflux pipeline, and a second reflux pump (24) is provided on the fourth reflux pipeline. A fourth liquid level transmitter (22) is provided on the oxygen side water collector (9), and the second reflux pump (24) is signal-connected to the fourth liquid level transmitter (22).

Images