Protective coating and seawater hydrogen production device

Abstract

The utility model relates to a protective coating and a seawater hydrogen production device. The protective coating comprises an epoxy resin layer, a graphene layer and a POZD material body layer which are sequentially stacked. The protective coating has good anti-corrosion performance, can provide effective anti-corrosion protection for the seawater hydrogen production device when being applied to the seawater hydrogen production device, effectively improves the anti-corrosion capability of the seawater hydrogen production device, ensures normal operation of the seawater hydrogen production device in a seawater hydrogen production state for a long time, and is beneficial to development of a seawater hydrogen production technology; the cost of seawater hydrogen production is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production by electrolyzing water, and particularly to a protective coating and a seawater hydrogen production device. Background Art

[0002] Hydrogen is an important clean energy in the future, with the characteristics of pollution-free and high energy density. Currently, the mature commercial hydrogen production technologies mainly include hydrogen production by electrolyzing water, hydrogen production by coal gasification, hydrogen production by steam reforming of natural gas, etc. Among them, the process of hydrogen production by electrolyzing water is clean and emission-free, and the hydrogen production purity is high, which is one of the more ideal hydrogen production technologies. Seawater is one of the most abundant resources on the earth and can be used as the water source for electrolytic hydrogen production. If efficient seawater hydrogen production can be achieved and seawater resource utilization can be realized, it has great application prospects.

[0003] However, in related seawater hydrogen production devices, due to the lack of effective coating protection on the walls of components such as pipelines and electrolytic cells in contact with seawater, problems such as corrosion and the attachment and growth of marine organisms easily occur in the seawater hydrogen production device, seriously affecting the normal operation of the hydrogen production device, restricting the development of seawater hydrogen production, and increasing the cost of seawater hydrogen production. Summary of the Invention

[0004] Based on this, the present application provides a protective coating and a seawater hydrogen production device to provide protection for the seawater hydrogen production device and improve the anti-corrosion ability of the seawater hydrogen production device.

[0005] An embodiment of the first aspect of the present application provides a protective coating for a seawater hydrogen production device, and the protective coating includes an epoxy resin layer, a graphene layer, and a POZD material body layer that are sequentially stacked.

[0006] In one embodiment, the protective coating further includes an alloy layer, and the alloy layer is located on the side of the epoxy resin layer away from the graphene layer.

[0007] In one embodiment, the thickness of the alloy layer is 250um - 500um.

[0008] In one embodiment, the graphene layer includes an epoxy graphene layer and a fluorocarbon topcoat layer that are sequentially stacked in a direction away from the epoxy resin layer.

[0009] In one embodiment, the thickness of the graphene layer is 500um - 550um.

[0010] In one embodiment, the POZD material body layer includes a first POZD material layer, a flexible connection layer, and a second POZD material layer that are sequentially stacked in a direction away from the graphene layer.

[0011] In one embodiment, the thickness of the POZD material layer is 5 mm - 85 mm.

[0012] In one embodiment, the thickness of the epoxy resin layer is 2000 um - 3000 um.

[0013] An embodiment of the second aspect of the present application provides a seawater hydrogen production device, including an electrolytic cell and a protective coating according to any one of the above embodiments, and the protective coating is coated on the cell wall of the electrolytic cell.

[0014] In one embodiment, it further includes a hydrogen separator, an oxygen separator, an alkali liquor cooler, and an alkali liquor filter; the hydrogen separator is connected to the electrolytic cell through a pipeline, and the hydrogen separator is used to separate hydrogen and alkali liquor; the oxygen separator is connected to the electrolytic cell through a pipeline, and the oxygen separator is used to separate oxygen and alkali liquor; the alkali liquor cooler is connected to both the hydrogen separator and the oxygen separator through pipelines, and the alkali liquor filter is connected to the alkali liquor cooler and the electrolytic cell; the pipe wall of the pipeline is coated with the protective coating.

[0015] In one embodiment, it further includes a hydrogen purification device and an oxygen purification device; the hydrogen purification device is connected to the hydrogen separator, and the hydrogen purification device is used to purify the hydrogen separated by the hydrogen separator; the oxygen purification device is connected to the oxygen separator, and the oxygen purification device is used to purify the oxygen separated by the oxygen separator.

[0016] In one embodiment, the hydrogen purification device and the oxygen purification device have the same structure, and both include a scrubber, a cooler, a water-gas separator connected in sequence, and a drain and an exhaust pipeline connected to the water-gas separator; the scrubber is connected to the hydrogen separator or the oxygen separator, and the scrubber is connected to a water inlet pipeline.

[0017] The above protection coating includes an epoxy resin layer, a graphene layer, and a POZD material body layer that are sequentially laminated; the epoxy resin layer has excellent water resistance, corrosion resistance, wear resistance, ultraviolet radiation resistance, high temperature resistance, etc., so as to effectively protect the seawater hydrogen production device from the erosion and damage of factors such as seawater, marine organisms, and marine environment. In addition, the epoxy resin layer also has good adhesiveness and coating properties, and can provide excellent surface protection and repair effects for the seawater hydrogen production device. The graphene layer can have multiple anti-corrosion mechanisms such as a barrier effect, an electrochemical protection effect, and an adsorption reaction effect in the marine environment, so as to improve the corrosion resistance of the seawater hydrogen production device in the seawater environment. In addition, the POZD material body layer can withstand the erosion of media such as water, seawater, acids, alkalis, and salts for a long time, has excellent anti-corrosion performance, and can provide effective anti-corrosion protection for the seawater hydrogen production device. In this way, applying the protection coating to the seawater hydrogen production device can provide effective anti-corrosion protection for the seawater hydrogen production device, effectively improve the anti-corrosion ability of the seawater hydrogen production device, ensure the normal operation of the seawater hydrogen production device in the long-term seawater hydrogen production state, facilitate the development of seawater hydrogen production technology, and reduce the cost of seawater hydrogen production. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the protection coating provided by some embodiments of the present application.

[0019] Figure 2 It is a schematic structural diagram of the seawater hydrogen production device provided by some embodiments of the present application.

[0020] Description of the Reference Numerals:

[0021] 10. Protection coating;

[0022] 110. Epoxy resin layer; 120. Graphene layer; 121. Epoxy graphene layer; 122. Fluorocarbon topcoat layer; 130. POZD material body layer; 131. First POZD material layer; 132. Flexible connection layer; 133. Second POZD material layer; 140. Alloy layer;

[0023] 20. Seawater hydrogen production device; 210. Electrolytic cell; 220. Hydrogen separator; 230. Oxygen separator; 240. Alkali liquid cooler; 250. Alkali liquid filter; 260. Hydrogen purification device; 270. Oxygen purification device; 281. Scrubber; 282. Cooler; 283. Water-vapor separator; 284. Drain; 285. Exhaust pipe. Detailed Embodiments

[0024] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0026] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0027] In the present application, unless otherwise clearly specified and limited, if terms such as "mounted", "connected", "coupled", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation manner.

[0030] Hydrogen is an important clean energy source in the future, with the characteristics of being pollution-free and having a high energy density. Currently, the mature commercial hydrogen production technologies mainly include electrolytic water hydrogen production, coal gasification hydrogen production, natural gas steam reforming hydrogen production, etc. Among them, the electrolytic water hydrogen production process is clean and emission-free, and the hydrogen production purity is high, which is one of the more ideal hydrogen production technologies. Seawater is one of the most abundant resources on the earth and can be used as the water source for electrolytic hydrogen production. If efficient seawater hydrogen production can be achieved and seawater resource utilization can be realized, it has great application prospects.

[0031] However, in related seawater hydrogen production devices, due to the lack of effective coating protection on the walls of components such as pipelines and electrolyzers in contact with seawater, problems such as corrosion and the attachment and growth of marine organisms are likely to occur in the seawater hydrogen production devices, seriously affecting the normal operation of the hydrogen production devices, restricting the development of seawater hydrogen production, and increasing the cost of seawater hydrogen production.

[0032] Based on the above technical problems, this application provides a protective coating to provide protection for the seawater hydrogen production device and improve the anti-corrosion ability of the seawater hydrogen production device.

[0033] Figure 1 The structural schematic diagram of the protective coating provided by some embodiments of this application is shown. Refer to Figure 1 As shown, an embodiment of the first aspect of this application provides a protective coating 10 for a seawater hydrogen production device 20. The protective coating 10 includes an epoxy resin layer 110, a graphene layer 120, and a POZD material body layer 130 that are sequentially stacked.

[0034] It should be noted that the epoxy resin layer 110, the graphene layer 120, and the POZD material body layer 130 can be successively coated on the wall surface, which includes the wall surfaces of components such as the pipelines in the seawater hydrogen production device 20 that come into contact with seawater and the electrolytic cell 210, so as to form a protective coating 10 on the seawater hydrogen production device 20.

[0035] The protective coating 10 provided by the embodiment of the present application includes an epoxy resin layer 110, a graphene layer 120, and a POZD material body layer 130 that are successively stacked; the epoxy resin layer 110 has excellent water resistance, corrosion resistance, wear resistance, ultraviolet radiation resistance, high temperature resistance, etc., so as to effectively protect the seawater hydrogen production device 20 from the erosion and damage of factors such as seawater, marine organisms, and marine environment. In addition, the epoxy resin layer 110 also has good adhesiveness and coating properties, and can provide excellent surface protection and repair effects for the seawater hydrogen production device 20. The graphene layer 120 has multiple anti-corrosion mechanisms such as a barrier effect, an electrochemical protection effect, and an adsorption reaction effect in the marine environment, so as to improve the corrosion resistance of the seawater hydrogen production device 20 in the seawater environment. In addition, the POZD material body layer 130 can withstand the erosion of media such as water, seawater, acid, alkali, and salt for a long time, and has excellent anti-corrosion performance, and can provide effective anti-corrosion protection for the seawater hydrogen production device 20. In this way, applying the protective coating 10 to the seawater hydrogen production device 20 can provide effective anti-corrosion protection for the seawater hydrogen production device 20, effectively improve the anti-corrosion ability of the seawater hydrogen production device 20, ensure the normal operation of the seawater hydrogen production device 20 in the long-term seawater hydrogen production state, facilitate the development of seawater hydrogen production technology, and reduce the cost of seawater hydrogen production.

[0036] In one embodiment, the protective coating 10 further includes an alloy layer 140, and the alloy layer 140 is located on the side of the epoxy resin layer 110 away from the graphene layer 120.

[0037] The alloy coating can increase the surface acid and alkali resistance and corrosion resistance, so as to improve the anti-corrosion performance of the protective coating 10. The alloy layer 140 is located on the side of the epoxy resin layer 110 away from the graphene layer 120, that is to say, the alloy layer 140 is the layer in the protective coating 10 that is close to the wall surface. In this way, it is beneficial to improve the anti-corrosion ability of the wall surface, and then improve the anti-corrosion ability of the seawater hydrogen production device 20, ensure the service life of the seawater hydrogen production device 20, facilitate the development of seawater hydrogen production technology, and reduce the cost of seawater hydrogen production.

[0038] In one embodiment, the thickness of the alloy layer 140 is 250um to 500um. In a specific example, the thickness of the alloy layer 140 is 300um. The present application does not make special restrictions on this.

[0039] In one embodiment, the graphene layer 120 includes an epoxy graphene layer 121 and a fluorocarbon topcoat layer 122 that are sequentially stacked in a direction away from the epoxy resin layer 110. In this way, the graphene layer 120 can have multiple anti-corrosion mechanisms such as a barrier effect, an electrochemical protection effect, and an adsorption reaction effect, which is beneficial to improving the anti-corrosion performance of the protective coating 10, and thus beneficial to improving the corrosion resistance of the seawater hydrogen production device 20 in a seawater environment.

[0040] In one embodiment, the thickness of the graphene layer 120 is 500 um to 550 um. In a specific example, the thickness of the graphene layer 120 is 500 um.

[0041] In one embodiment, the POZD material body layer 130 includes a first POZD (Polyisocyanate-oxazodone) material layer 131, a flexible connection layer 132, and a second POZD material layer 133 that are sequentially stacked in a direction away from the graphene layer 120.

[0042] In this way, both the first POZD material layer 131 and the second POZD material layer 133 have the characteristics of rapid curing, high elongation, high tensile strength, high tear strength, waterproof and impermeable, impact resistance, corrosion resistance, wear resistance, and aging resistance. They can be spray-formed on any curved surface, inclined surface, or vertical surface without running, which is convenient for construction. The construction curing speed is fast, there are no solvents and no volatile substances, and it will not pollute the seawater. This can be beneficial to the application of the protective coating 10 in the seawater hydrogen production device 20, improve the anti-corrosion performance of the protective coating 10, and shorten the construction period of the protective coating 10. The flexible connection layer 132 is located between the first POZD material layer 131 and the second POZD material layer 133, which can make the POZD material body layer 130 have good impact resistance physical properties and can effectively resist the low-frequency reciprocating impact of seawater, thereby being beneficial to extending the service life of the protective coating 10.

[0043] In one embodiment, the thickness of the POZD material body layer 130 is 5 mm - 85 mm.

[0044] In one embodiment, the thickness of the epoxy resin layer 110 is 2000 um - 3000 um. In a specific example, the thickness of the epoxy resin layer 110 is 2500 um.

[0045] Figure 2 The structural schematic diagram of the seawater hydrogen production device provided by some embodiments of the present application is shown. Refer to Figure 2 As shown, an embodiment of the second aspect of the present application provides a seawater hydrogen production device 20, including an electrolytic cell 210 and the protective coating 10 according to any one of the above embodiments, and the protective coating 10 is coated on the cell wall of the electrolytic cell 210.

[0046] It should be noted that the epoxy resin layer 110, the graphene layer 120, and the POZD material body layer 130 can be sequentially coated on the inner wall of the electrolytic cell 210 to form a protective coating 10 on the inner wall of the electrolytic cell 210.

[0047] The seawater hydrogen production device 20 provided by the embodiment of the present application includes an electrolytic cell 210 and the protective coating 10 according to any one of the above embodiments. The protective coating 10 is coated on the inner wall of the electrolytic cell 210. The protective coating 10 includes an epoxy resin layer 110, a graphene layer 120, and a POZD material body layer 130 arranged in sequence. The epoxy resin layer 110 has excellent water resistance, corrosion resistance, wear resistance, ultraviolet radiation resistance, high temperature resistance, etc., so as to effectively protect the electrolytic cell 210 from the erosion and damage of factors such as seawater, marine organisms, and marine environment. In addition, the epoxy resin layer 110 also has good adhesiveness and coatability, and can provide excellent surface protection and repair effects for the electrolytic cell 210. The graphene layer 120 has multiple anti-corrosion mechanisms such as a barrier effect, an electrochemical protection effect, and an adsorption reaction effect in a marine environment, so as to improve the corrosion resistance of the electrolytic cell 210 in a seawater environment. In addition, the POZD material body layer 130 can withstand the erosion of media such as water, seawater, acid, alkali, and salt for a long time, has excellent anti-corrosion performance, and can provide effective anti-corrosion protection for the electrolytic cell 210. Thus, the anti-corrosion ability of the seawater hydrogen production device 20 can be effectively improved, ensuring the normal operation of the seawater hydrogen production device 20 in a long-term seawater hydrogen production state, facilitating the development of seawater hydrogen production technology, and reducing the cost of seawater hydrogen production.

[0048] In one of the embodiments, it further includes a hydrogen separator 220, an oxygen separator 230, an alkali liquid cooler 240, and an alkali liquid filter 250. The hydrogen separator 220 is connected to the electrolytic cell 210 through a pipeline. The hydrogen separator 220 is used to separate hydrogen and alkali liquid. The oxygen separator 230 is connected to the electrolytic cell 210 through a pipeline. The oxygen separator 230 is used to separate oxygen and alkali liquid. The alkali liquid cooler 240 is connected to both the hydrogen separator 220 and the oxygen separator 230 through pipelines. The alkali liquid filter 250 is connected to the alkali liquid cooler 240 and the electrolytic cell 210. The inner wall of the pipeline is coated with the protective coating 10.

[0049] Thus, the hydrogen separator 220 and the oxygen separator 230 facilitate the separation of the oxygen and hydrogen electrolyzed in the electrolyzer 210, which is beneficial to the utilization of hydrogen and oxygen. By connecting the lye cooler 240 to both the hydrogen separator 220 and the oxygen separator 230 through pipelines, and connecting the lye filter 250 to the lye cooler 240 and the electrolyzer 210, in this way, the lye separated in the hydrogen separator 220 and the oxygen separator 230 can flow back to the electrolyzer 210 after being cooled and filtered by the lye cooler 240 and the lye filter 250, which is conducive to the recycling of the lye, thereby reducing the electrolysis cost and the cost of hydrogen production from seawater, and facilitating the development of the hydrogen production technology from seawater. In addition, by coating the inner wall of the pipeline with the protective coating 10, the anti-corrosion ability of the pipeline can be improved, and thus the anti-corrosion ability of the seawater hydrogen production device 20 can be enhanced.

[0050] In one embodiment, a hydrogen purification device 260 and an oxygen purification device 270 are further included; the hydrogen purification device 260 is connected to the hydrogen separator 220, and the hydrogen purification device 260 is used for purifying the hydrogen separated by the hydrogen separator 220; the oxygen purification device 270 is connected to the oxygen separator 230, and the oxygen purification device 270 is used for purifying the oxygen separated by the oxygen separator 230.

[0051] Thus, the hydrogen separated by the hydrogen separator 220 can be purified by the hydrogen purification device 260, and the oxygen separated by the oxygen separator 230 can be purified by the oxygen purification device 270, improving the purity of hydrogen and oxygen, so as to facilitate the use of hydrogen and oxygen.

[0052] In one embodiment, the hydrogen purification device 260 and the oxygen purification device 270 have the same structure, and both include a scrubber 281, a cooler 282, a water-gas separator 283 connected in sequence, and a drain 284 and an exhaust pipe 285 connected to the water-gas separator 283; the scrubber 281 is connected to the hydrogen separator 220 or the oxygen separator 230, and the scrubber 281 is connected to an inlet pipe (not shown in the figure).

[0053] Thus, through the scrubber 281, the cooler 282, the water-gas separator 283, and the drain 284 and the exhaust pipe 285 connected to the water-gas separator 283, it is convenient to purify hydrogen and oxygen, and separate the purified hydrogen and water as well as oxygen and water, thus facilitating the use of hydrogen and oxygen.

[0054] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0055] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A protective coating for a seawater hydrogen production device, Characterized in that, The protective coating includes an epoxy resin layer, a graphene layer, and a POZD material body layer that are sequentially stacked; The graphene layer includes an epoxy graphene layer and a fluorocarbon topcoat layer that are sequentially stacked in a direction away from the epoxy resin layer; The POZD material body layer includes a first POZD material layer, a flexible connection layer, and a second POZD material layer that are sequentially stacked in a direction away from the graphene layer.

2. The protective coating according to claim 1, Characterized in that, The protective coating further includes an alloy layer, and the alloy layer is located on a side of the epoxy resin layer away from the graphene layer.

3. The protective coating according to claim 2, Characterized in that, The thickness of the alloy layer is 250um - 500um.

4. The protective coating according to claim 1, Characterized in that, The thickness of the graphene layer is 500um - 550um.

5. The protective coating according to claim 1, Characterized in that, The thickness of the POZD material body layer is 5mm - 85mm.

6. The protective coating according to claim 1, Characterized in that, The thickness of the epoxy resin layer is 2000um - 3000um.

7. A seawater hydrogen production device, Characterized in that, It includes an electrolytic cell and the protective coating according to any one of claims 1 to 6, and the protective coating is coated on the cell wall of the electrolytic cell.

8. The seawater hydrogen production device according to claim 7, Characterized in that, It further includes a hydrogen separator, an oxygen separator, an alkali liquor cooler, and an alkali liquor filter; the hydrogen separator is connected to the electrolytic cell through a pipeline, and the hydrogen separator is used to separate hydrogen and alkali liquor; the oxygen separator is connected to the electrolytic cell through a pipeline, and the oxygen separator is used to separate oxygen and alkali liquor; the alkali liquor cooler is connected to both the hydrogen separator and the oxygen separator through pipelines, and the alkali liquor filter is connected to the alkali liquor cooler and the electrolytic cell; the pipe wall of the pipeline is coated with the protective coating.

9. The seawater hydrogen production device according to claim 8, Characterized in that, It further includes a hydrogen purification device and an oxygen purification device; the hydrogen purification device is connected to the hydrogen separator, and the hydrogen purification device is used to purify the hydrogen separated by the hydrogen separator; the oxygen purification device is connected to the oxygen separator, and the oxygen purification device is used to purify the oxygen separated by the oxygen separator.

10. The seawater hydrogen production device according to claim 9, Characterized in that, The hydrogen purification device and the oxygen purification device have the same structure, and both include a scrubber, a cooler, a water-gas separator connected in sequence, and a drain and an exhaust pipeline connected to the water-gas separator; the scrubber is connected to the hydrogen separator or the oxygen separator, and the scrubber is connected to a water inlet pipeline.

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