Electrolytic hydrogen production system and container building module

Abstract

An electrolytic hydrogen production system and a container building module. The electrolytic hydrogen production system comprises an electrolytic tank, a liquid supplementing device and an air separation device. The electrolytic tank is used for electrolyzing water into hydrogen and oxygen, and the electrolytic tank is provided with a liquid inlet. And the liquid supplementing device is used for providing supplementing liquid for the electrolytic tank. The air separation device is provided with a replenishing liquid inlet, a replenishing liquid outlet and a waste gas outlet, the replenishing liquid inlet is communicated with the liquid supplementing device, the replenishing liquid outlet is communicated with the liquid inlet of the electrolytic tank, and the air separation device is used for separating air in replenishing liquid. According to the electrolytic hydrogen production system, the air separation device is used for carrying out air separation on the replenishing liquid of the electrolytic tank, the purity of the product hydrogen is improved, the original technological process is slightly changed, the occupied space is small, and no negative influence is generated on the size of original equipment.

Description

Technical Field

[0001] The present application relates to the technical field of electrolytic hydrogen production, and in particular to an electrolytic hydrogen production system and a container building module. Background Art

[0002] Ultrapure hydrogen with a purity of more than 99.9999% is essential for industries where trace impurities seriously affect quality and efficiency. For example, in semiconductor manufacturing, ultrapure hydrogen is essential for processes such as chemical vapor deposition to ensure high-quality production of electronic products; in analytical laboratories, ultrapure hydrogen can be used as a carrier gas for gas chromatography and a reactant for mass spectrometry to achieve precise chemical analysis. In addition, ultrapure hydrogen is also used in hydrogenation reactions in pharmaceuticals to maintain product integrity and to prevent oxidation in optical fiber production. The role of ultrapure hydrogen in high-performance fuel cells is also very important in achieving the highest efficiency and service life of advanced technologies.

[0003] The current gas-liquid separation and purification process for hydrogen production by electrolysis cannot stably produce ultrapure hydrogen. With the air brought into the system from the outside, especially the dissolved air introduced during water and / or alkali replenishment, it is difficult to remove inert gases such as nitrogen and argon.

[0004] Therefore, there is a need for an electrolysis hydrogen production system and a container building module to at least partially solve the above problems. Summary of the invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] In order to at least partially solve the above problems, the first aspect of the present application provides an electrolysis hydrogen production system, the electrolysis hydrogen production system comprising:

[0007] An electrolytic cell for electrolyzing water into hydrogen and oxygen, the electrolytic cell having a liquid inlet;

[0008] A liquid replenishing device, used for providing replenishing liquid to the electrolytic cell;

[0009] An air separation device, the air separation device having a replenishing liquid inlet, a replenishing liquid outlet and a waste gas outlet, wherein the replenishing liquid inlet is connected to the replenishing liquid device, the replenishing liquid outlet is connected to the liquid inlet of the electrolytic cell, and the air separation device is used to separate the air in the replenishing liquid.

[0010] According to the electrolytic hydrogen production system of the present application, by arranging an air separation device between the liquid replenishing device and the liquid inlet of the electrolytic cell, the air separation device can separate the air from the replenishing liquid replenished by the liquid replenishing device to the electrolytic cell, reduce the content of dissolved air introduced during the liquid replenishing process, and thus reduce the air entrainment in the entire electrolytic hydrogen production system to improve the purity of the final hydrogen product. In addition, the electrolytic hydrogen production system of the present application has little change to the existing process flow and structural settings, can keep the original process module unchanged to the maximum extent, and is easy to install and modify.

[0011] Optionally, the electrolytic cell further has a hydrogen side outlet;

[0012] The electrolytic hydrogen production system further includes a gas-liquid separator, which is communicated with the hydrogen side outlet and has a hydrogen discharge outlet;

[0013] The air separation device also has a hydrogen inlet, which is connected to the hydrogen outlet so that hydrogen can enter the hydrogen inlet and the air separated from the replenishing liquid can be discharged from the air separation device along with the hydrogen through the waste gas outlet.

[0014] Optionally, the air separation device comprises a tank body, the exhaust gas outlet, the hydrogen inlet and the supplementary liquid inlet are arranged in the tank body and communicate with the internal space of the tank body;

[0015] The hydrogen inlet is located below the replenishing liquid inlet;

[0016] The exhaust gas outlet is located at the top of the tank body.

[0017] Optionally, the tank body includes a separation portion, which is located between the replenishing liquid inlet and the hydrogen inlet. A filler is provided in the separation portion, and the filler is used to mix and contact the replenishing liquid and the hydrogen to promote the separation of air in the replenishing liquid.

[0018] Optionally, the air separation device comprises a tank body, the supplementary liquid inlet, the supplementary liquid outlet and the waste gas outlet are arranged in the tank body and communicate with the internal space of the tank body;

[0019] The replenishing liquid discharge port is located below the replenishing liquid inlet;

[0020] The exhaust gas outlet is located at the top of the tank body.

[0021] Optionally, the air separation device further comprises a sprayer, wherein the sprayer is disposed in the tank body and is connected to the replenishing liquid inlet to evenly distribute the replenishing liquid.

[0022] Optionally, the tank body includes a separation portion, the separation portion is located between the replenishing liquid inlet and the replenishing liquid outlet, and a filler is arranged in the separation portion.

[0023] Optionally, the tank body further comprises a liquid storage portion, the liquid storage portion is located below the separation portion, and the replenishing liquid discharge port is arranged in the liquid storage portion.

[0024] Optionally, the liquid replenishing device includes a water replenishing tank and / or an alkali replenishing tank.

[0025] A second aspect of the present application provides a container building module, wherein the container building module comprises the electrolysis hydrogen production system described in the first aspect.

[0026] The container building module according to the present application has a technical effect similar to that of the electrolysis hydrogen production system described in the first aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following drawings of the present application are used as a part of the present application for understanding the present application. The drawings show the embodiments of the present application and their descriptions, which are used to explain the principle of the present application.

[0028] In the attached figure:

[0029] Figure 1 A schematic diagram of a hydrogen production system by electrolysis according to an embodiment of the present application;

[0030] Figure 2 is a schematic diagram of a hydrogen production system by electrolysis according to another embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of an air separation device according to an embodiment of the present application.

[0032] Description of reference numerals:

[0033] 100: Electrolysis hydrogen production system 110: Electrolysis cell

[0034] 111: Liquid inlet 112: Hydrogen side outlet

[0035] 113: Oxygen side outlet 121: Gas-liquid separator

[0036] 122: Hydrogen outlet 131: Second gas-liquid separator

[0037] 140: Fluid replenishment device 150: Air separation device

[0038] 151: Tank 152: Separation part

[0039] 153: Liquid storage part 154: Hydrogen inlet

[0040] 155: Supplementary liquid inlet 156: Supplementary liquid outlet

[0041] 157: Exhaust outlet 158: Sprinkler

[0042] 159: Packing 160: First branch line

[0043] 161: Second branch pipeline 162: Return pipeline DETAILED DESCRIPTION

[0044] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0045] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0046] Ordinal numbers such as "first" and "second" cited in this application are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and similar expressions used in this document are for illustrative purposes only and are not limiting.

[0047] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

[0048] refer to Figure 1In a first aspect of the present application, there is provided an electrolytic hydrogen production system 100, which includes an electrolytic cell 110, a liquid replenishing device 140, and an air separation device 150. The electrolytic cell 110 is used to electrolyze water into hydrogen and oxygen, and the electrolytic cell 110 has a liquid inlet 111. The liquid replenishing device 140 is used to provide replenishing liquid to the electrolytic cell 110. The air separation device 150 has a replenishing liquid inlet 155, a replenishing liquid outlet 156, and a waste gas outlet 157. The replenishing liquid inlet 155 is connected to the liquid replenishing device 140, and the replenishing liquid outlet 156 is connected to the liquid inlet 111 of the electrolytic cell 110. The air separation device 150 is used to separate air from the replenishing liquid.

[0049] According to the electrolytic hydrogen production system 100 of the present application, by arranging an air separation device 150 between the liquid replenishing device 140 and the liquid inlet 111 of the electrolytic cell 110, the air separation device 150 can separate the replenishing liquid replenished by the liquid replenishing device 140 to the electrolytic cell 110, reduce the content of dissolved air introduced during the replenishing process, and further reduce the air entrainment in the entire electrolytic hydrogen production system 100, so as to improve the purity of the final hydrogen product. In addition, the electrolytic hydrogen production system 100 of the present application has little change to the existing process flow and structural setting, can keep the original process module unchanged to the maximum extent, and is easy to install and modify.

[0050] It should be noted that there are various specific structures of the air separation device 150, and existing separation devices that can achieve gas-liquid separation and reduce the air content of the supplementary liquid (such as heating separation devices) can be applied to the electrolysis hydrogen production system 100 of the present application.

[0051] In addition, as an optional implementation, the liquid replenishing device 140 may include a water replenishing tank, or may include an alkali replenishing tank, or the liquid replenishing device 140 may include both a water replenishing tank and an alkali replenishing tank.

[0052] Continue to refer Figure 1 and Figure 2 The electrolytic cell also has a hydrogen outlet 112 and an oxygen outlet 113. The electrolytic hydrogen production system 100 also includes a gas-liquid separator 121 and a second gas-liquid separator 131. The gas-liquid separator 121 is connected to the hydrogen outlet 112, and the second gas-liquid separator 131 is connected to the oxygen outlet 113. The gas-liquid separator 121 also has a hydrogen outlet 122.

[0053] In this embodiment, the air separation device 150 also has a hydrogen inlet 154, which is connected to the hydrogen outlet 122 so that hydrogen can enter the hydrogen inlet 154 and the air separated from the replenishing liquid can be discharged from the air separation device 150 through the waste gas outlet 157 along with the hydrogen.

[0054] It can be understood that the gas-liquid separator 121 is used to separate the mixture of hydrogen and liquid discharged from the hydrogen side outlet 112 to obtain a purified hydrogen product, and discharge it through the hydrogen outlet 122 for use. The hydrogen inlet 154 of the air separation device 150 is connected to the hydrogen outlet 122, so that part of the hydrogen in the hydrogen outlet 122 flows into the air separation device 150. Driven by the hydrogen gas flow, the air separated from the supplementary liquid can be discharged with the hydrogen through the waste gas outlet 157, and the air discharge effect is better.

[0055] Specifically, a first branch pipeline 160 may be disposed between the hydrogen inlet 154 and the hydrogen outlet 122 to allow the hydrogen inlet 154 to communicate with the hydrogen outlet 122 .

[0056] Furthermore, the liquid outlet of the gas-liquid separator 121 (and the liquid outlet of the second gas-liquid separator 131) is connected to the liquid inlet 111 through the reflux pipeline 162, so that the separated liquid returns to the electrolytic cell 110 to participate in the reaction. In this embodiment, the replenishing liquid outlet 156 of the air separation device 150 is connected to the reflux pipeline 162 through the second branch pipeline 161 to achieve the communication between the replenishing liquid outlet 156 and the liquid inlet 111 of the electrolytic cell 110, so that the replenishing liquid with reduced air content in the air separation device 150 enters the electrolytic cell 110. Of course, in other optional embodiments, the replenishing liquid outlet 156 can also be directly connected to the liquid inlet 111 of the electrolytic cell 110 through a pipeline.

[0057] refer to Figure 3 In this embodiment, the air separation device 150 includes a tank body 151, and a hydrogen inlet 154, a replenishing liquid inlet 155, a replenishing liquid outlet 156 and a waste gas outlet 157 are all arranged in the tank body 151 and connected to the internal space of the tank body 151; wherein, the hydrogen inlet 154 is located below the replenishing liquid inlet 155, the replenishing liquid outlet 156 is located below the replenishing liquid inlet 155, and the waste gas outlet 157 is located at the top of the tank body 151.

[0058] Specifically, the tank body 151 includes a separation portion 152, which is located between the replenishing liquid inlet 155 and the hydrogen inlet 154. A filler 159 is provided in the separation portion 152, and the filler 159 is used to mix and contact the replenishing liquid with hydrogen to promote the separation of air in the replenishing liquid.

[0059] Thus, hydrogen enters the air separation device 150 from the hydrogen inlet 154 and flows from bottom to top; the replenishing liquid enters the air separation device 150 from the replenishing liquid inlet 155 and flows from top to bottom; in this process, the replenishing liquid will be separated into gas and liquid in the filler 159 in the separation part 152, and the hydrogen will also flow upward to the filler 159, thereby driving the separated air to flow upward together, and finally discharged from the air separation device 150 from the waste gas outlet 157 located at the top of the tank body 151; and after separating the air, the replenishing liquid continues to flow downward, and finally discharged from the air separation device 150 from the replenishing liquid outlet 156.

[0060] It can be understood that in this embodiment, the separation portion 152 is also located between the replenishing liquid inlet 155 and the replenishing liquid outlet 156 so that the replenishing liquid can fully complete the gas-liquid separation in the filler 159.

[0061] Furthermore, the tank body 151 further includes a liquid storage part 153, which is located below the separation part 152, and the replenishing liquid outlet 156 is provided in the liquid storage part 153. The liquid storage part 153 is provided to leave a buffer space for the replenishing liquid after the air is separated.

[0062] At the same time, in this embodiment, the hydrogen inlet 154 is arranged above the replenishing liquid discharge port 156, so that the replenishing liquid in the liquid storage part 153 does not affect the entry of hydrogen into the hydrogen inlet 154; the radial dimension of the liquid storage part 153 is larger than the radial dimension of the separation part 152 to assist the hydrogen entering the hydrogen inlet 154 to flow upward.

[0063] Preferably, the air separation device 150 in this embodiment further includes a sprayer 158 , which is disposed in the tank body 151 and is connected to the replenishing liquid inlet 155 to evenly distribute the replenishing liquid and improve the contact with the filler 159 .

[0064] The filler 159 is used to increase the contact area of ​​the replenishing liquid and promote the air in the replenishing liquid to separate out from the liquid. The filler 159 can be made of existing materials and structures, such as MELPARK 252Y.

[0065] The second aspect of the present application provides a container building module, which includes the electrolysis hydrogen production system 100 of the first aspect. The container building module is preferably a skid.

[0066] The container building module according to the present application has a technical effect similar to that of the electrolysis hydrogen production system 100 of the first aspect described above.

[0067] The processes and steps described in all the above preferred embodiments are only examples. Unless adverse effects occur, various processing operations can be performed in a sequence different from the sequence of the above processes. The sequence of steps in the above processes can also be increased, merged or deleted according to actual needs.

[0068] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present application. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present application. The features described herein in one embodiment may be applied to another embodiment individually or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0069] The present application has been illustrated through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and explanation, and the present application is not limited to the above-mentioned embodiments. According to the teachings of the present application, more variations and modifications can be made, and these variations and modifications all fall within the scope of protection claimed by the present application.

Claims

1. A hydrogen production system by electrolysis, characterized in that: The electrolysis hydrogen production system comprises: An electrolytic cell for electrolyzing water into hydrogen and oxygen, the electrolytic cell having a liquid inlet; A liquid replenishing device, used for providing replenishing liquid to the electrolytic cell; An air separation device, the air separation device having a replenishing liquid inlet, a replenishing liquid outlet and a waste gas outlet, wherein the replenishing liquid inlet is connected to the replenishing liquid device, the replenishing liquid outlet is connected to the liquid inlet of the electrolytic cell, and the air separation device is used to separate the air in the replenishing liquid.

2. The electrolysis hydrogen production system according to claim 1, characterized in that: The electrolytic cell also has a hydrogen side outlet; The electrolytic hydrogen production system further includes a gas-liquid separator, which is communicated with the hydrogen side outlet and has a hydrogen discharge outlet; The air separation device also has a hydrogen inlet, which is connected to the hydrogen outlet so that hydrogen can enter the hydrogen inlet and the air separated from the replenishing liquid can be discharged from the air separation device along with the hydrogen through the waste gas outlet.

3. The electrolysis hydrogen production system according to claim 2, characterized in that: The air separation device comprises a tank body, the exhaust gas outlet, the hydrogen inlet and the supplementary liquid inlet are arranged in the tank body and communicate with the internal space of the tank body; The hydrogen inlet is located below the replenishing liquid inlet; The exhaust gas outlet is located at the top of the tank body.

4. The electrolysis hydrogen production system according to claim 3, characterized in that: The tank body includes a separation portion, which is located between the replenishing liquid inlet and the hydrogen inlet. A filler is arranged in the separation portion, and the filler is used to mix and contact the replenishing liquid with the hydrogen to promote the separation of air in the replenishing liquid.

5. The electrolysis hydrogen production system according to claim 1, characterized in that: The air separation device comprises a tank body, the replenishing liquid inlet, the replenishing liquid outlet and the waste gas outlet are arranged in the tank body and communicate with the internal space of the tank body; The replenishing liquid discharge port is located below the replenishing liquid inlet; The exhaust gas outlet is located at the top of the tank body.

6. The electrolysis hydrogen production system according to claim 5, characterized in that: The air separation device further comprises a sprayer, which is arranged in the tank body and communicated with the replenishing liquid inlet to evenly distribute the replenishing liquid.

7. The hydrogen production system by electrolysis according to claim 5 or 6, characterized in that: The tank body comprises a separation portion, the separation portion is located between the replenishing liquid inlet and the replenishing liquid outlet, and a filler is arranged in the separation portion.

8. The electrolysis hydrogen production system according to claim 7, characterized in that: The tank body further comprises a liquid storage part, the liquid storage part is located below the separation part, and the replenishing liquid discharge port is arranged in the liquid storage part.

9. The electrolysis hydrogen production system according to claim 1, characterized in that: The liquid replenishing device includes a water replenishing tank and / or an alkali replenishing tank.

10. A container building module, characterized in that: The container building module comprises an electrolysis hydrogen production system according to any one of claims 1-9.

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