Pipeline with hydrogen storage alloy coating and hydrogen energy production, storage, installation and / or transportation equipment

Abstract

The utility model relates to a pipeline with a hydrogen storage alloy coating and hydrogen energy production, storage, installation and / or transportation equipment, belongs to the technical field of metal protection, and solves the problems of pipeline corrosion caused by hydrogen corrosion and hydrogen permeation in the high-pressure hydrogen storage and transportation process and high cost of the existing hydrogen-resistant material in the prior art. The utility model provides a pipeline with a hydrogen storage alloy coating. The pipeline comprises a pipe shell, the hydrogen storage alloy coating arranged on the inner surface of the pipe shell and a heat exchange device. The heat exchange device is in contact with the outer surface of the tube shell; the number of the heat exchange devices is one or more, and the heat exchange devices have the refrigerating and heating functions. The hydrogen storage alloy coating can stably restrain hydrogen atoms in the hydrogen storage alloy, so that direct contact between hydrogen molecules and the inner wall of a container is remarkably reduced, and corrosion caused by hydrogen is effectively reduced; and the temperature of the pipeline can be adjusted through the heat exchange device to realize hydrogen absorption and hydrogen desorption conversion of the coating, so that the hydrogen insulation capacity is kept for a long time, and the system operation cost is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal protection technical field especially relates to a pipeline with hydrogen storage alloy coating and hydrogen energy production, storage, installation and / or transportation equipment. BACKGROUND

[0002] With the growing demand for clean energy worldwide, hydrogen energy as an efficient, renewable energy carrier, has received extensive attention and research. Hydrogen storage and transportation play a crucial role in hydrogen energy applications, among which, hydrogen storage containers as storage media, their performance directly affects the utilization efficiency and safety of hydrogen energy. However, hydrogen gas as a small molecule gas, its strong permeability leads to hydrogen gas easily permeating metal materials, causing hydrogen embrittlement and hydrogen-induced cracking corrosion problems, which seriously affect the stability and service life of hydrogen storage containers.

[0003] In order to solve the influence of hydrogen embrittlement on hydrogen storage and transportation, anti-hydrogen embrittlement materials are vigorously developed, among which, high alloy steels such as 316L stainless steel and nickel-based alloy are representative, which have excellent corrosion resistance and hydrogen embrittlement resistance, and perform excellently in high-pressure hydrogen environment. Its chemical composition and microstructure can effectively resist the penetration and diffusion of hydrogen atoms, providing good safety. However, its price is high, the material cost and processing cost increase significantly, causing large-scale application to be limited. In addition, these materials are usually heavier than low-carbon steel and low-alloy steel, increasing the cost of transportation and installation. SUMMARY

[0004] In view of the above analysis, the utility model aims to provide a pipeline with hydrogen storage alloy coating and hydrogen energy production, storage, installation and / or transportation equipment, to solve the problem of pipeline corrosion caused by hydrogen corrosion and hydrogen permeation in high-pressure hydrogen storage and transportation process, and the high cost of existing anti-hydrogen materials.

[0005] The purpose of the utility model is mainly realized by the following technical solutions:

[0006] The utility model provides a pipeline with hydrogen storage alloy coating, the pipeline includes pipe shell 1, hydrogen storage alloy coating 2 arranged on the inner surface of pipe shell 1 and heat exchange device 3;

[0007] The heat exchange device 3 is arranged in contact with the outer surface of the pipe shell 1;

[0008] The heat exchange device 3 is one or more, and the heat exchange device 3 has refrigeration and heating functions.

[0009] Specifically, the heat exchange device 3 is arranged on the outer surface of the pipe shell 1, and the heat exchange device 3 is arranged continuously or intermittently.

[0010] Specifically, the pipeline further comprises a temperature control system 4, and the heat exchange device 3 is connected with the temperature control system 4.

[0011] Specifically, the thickness of the hydrogen storage alloy coating 2 is 0.5-2mm.

[0012] Specifically, the hydrogen storage alloy coating 2 is an AB5 type rare earth-transition metal hydrogen storage alloy coating and / or an AB2 type rare earth-transition metal hydrogen storage alloy coating.

[0013] Specifically, the AB5 type rare earth-transition metal hydrogen storage alloy is LaNi5.

[0014] Specifically, the heat exchange device 3 is a full-coated heat exchange device.

[0015] Specifically, the heat exchange device 3 is a semi-coated heat exchange device.

[0016] Specifically, the pipeline is made of ordinary alloy steel; and the hydrogen absorption working range of the hydrogen storage alloy coating 2 is 0.03MPa < hydrogen pressure < 140MPa.

[0017] The utility model also provides a kind of hydrogen energy production, storage, installation and / or transport equipment, and the equipment includes the pipeline described.

[0018] Compared with prior art, the utility model at least can realize following beneficial effects one of:

[0019] 1, the pipeline of the utility model provides that the inner surface of pipe shell 1 is provided with hydrogen storage alloy coating 2, can avoid the direct contact of hydrogen and pipe shell 1, cooperates heat exchange device 3, can realize the absorption and release of hydrogen in pipeline, effectively reduces the corrosion of pipeline shell caused by hydrogen.

[0020] 2, the hydrogen storage alloy coating 2 of the utility model can use existing hydrogen storage alloy material, such as AB5 type rare earth-transition metal hydrogen storage alloy or AB2 type rare earth-transition metal hydrogen storage alloy, hydrogen absorption and release cycle life is long, can effectively prevent the problems such as aging and falling of anticorrosive coating in long-term use, to guarantee long-term anticorrosive effect.

[0021] In the utility model, the above-mentioned each technical scheme can be combined with each other to realize more preferred combination scheme. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings are only for the purpose of illustrating specific embodiments and are not considered as limiting the present application, and in the whole drawings, the same reference signs represent the same parts.

[0023] Figure 1 Structure diagram of a pipeline with hydrogen storage alloy coating.

[0024] Reference signs:

[0025] 1, pipe shell; 2, hydrogen storage alloy coating; 3, heat exchange device; 4, temperature control system. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present application will be described in detail below with reference to the drawings, wherein the drawings constitute a part of this application and are used together with the embodiments of the present application to explain the principles of the present application, but are not used to limit the scope of the present application.

[0027] The present application provides a pipeline with hydrogen storage alloy coating, the pipeline comprises a pipe shell, a hydrogen storage alloy coating arranged on the inner surface of the pipe shell and a heat exchange device;

[0028] The heat exchange device is arranged in contact with the outer surface of the pipe shell.

[0029] The heat exchange device is one or more, and the heat exchange device has refrigeration and heating functions.

[0030] Specifically, the hydrogen storage alloy coating utilizes its special chemical adsorption capacity for hydrogen to quickly react with hydrogen to form metal hydride, and after saturation, the hydrogen atoms are stably constrained in the hydrogen storage alloy, thereby significantly reducing the direct contact of hydrogen molecules with the inner wall of the container and effectively reducing the corrosion caused by hydrogen; the heat exchange device can control the temperature of the pipeline (i.e. the hydrogen storage alloy coating) in a suitable range as needed, thereby realizing the regulation and control of the hydrogen absorption and desorption performance of the coating to obtain the required hydrogen absorption and desorption rate.

[0031] Specifically, the hydrogen storage alloy coating is an AB5 type rare earth-transition metal hydrogen storage alloy coating and / or an AB2 type rare earth-transition metal hydrogen storage alloy coating.

[0032] It is worth noting that under constant temperature and different hydrogen pressures, the initial hydrogen absorption rate of various hydrogen storage alloys increases with the increase of hydrogen pressure, and the hydrogen absorption saturation also increases with the increase of hydrogen pressure, which is well understood. However, the relationship between the hydrogen absorption kinetics performance of different hydrogen storage alloys and temperature is different. In order to reduce the operating cost and improve the safety of hydrogen transportation / storage, the present application selects a hydrogen storage alloy with good hydrogen absorption performance at a lower temperature to make the coating.

[0033] Theoretical analysis and experimental screening find that, under constant hydrogen pressure and different temperatures, the initial hydrogen absorption rate and hydrogen absorption saturation vary with temperature in two absolutely opposite cases: the initial hydrogen absorption rate and hydrogen absorption saturation decrease with the increase of temperature, the AB2 type and AB5 type rare earth hydrogen storage material / alloy conform to the case, but the Mg type hydrogen storage material / alloy does not conform to the rule, therefore, the AB5 type and / or AB2 type rare earth-transition metal hydrogen storage alloy is selected in the utility model.

[0034] It is worth mentioning that, although it is feasible to make the hydrogen storage alloy coating by using the mixed hydrogen storage alloy, since the hydrogen absorption and release performance of different hydrogen storage alloys is different, in order to facilitate the control of the hydrogen absorption and release performance, it is preferred to prepare the hydrogen storage alloy coating by using one kind of hydrogen storage alloy.

[0035] Specifically, the AB5 type hydrogen storage alloy is LaNi5.

[0036] Specifically, the hydrogen absorption capacity of the hydrogen storage alloy decreases with the increase of temperature; the hydrogen release starts when the hydrogen pressure is less than or equal to 0.03 MPa.

[0037] Specifically, the pipeline is made of ordinary alloy steel; the hydrogen absorption working range of the hydrogen storage alloy coating is 0.03 MPa < hydrogen pressure < 140 MPa, and the above working range is determined by the properties (hydrogen absorption and release kinetics) of the existing hydrogen storage alloy. More preferably, when 4 MPa < hydrogen pressure < 140 MPa, most of the existing hydrogen storage alloy can exhibit the best performance.

[0038] Specifically, the thickness of the hydrogen storage alloy coating is 0.5-2 mm.

[0039] Specifically, the porosity of the hydrogen storage alloy coating is 10-20%.

[0040] Specifically, the heat exchange device is arranged on the outer surface of the shell, and the heat exchange device is arranged continuously or discontinuously, for example, a full-coated or half-coated heat exchange device can be used, which can realize the temperature control of the pipeline (including the internal hydrogen storage alloy coating).

[0041] Specifically, the maximum heating temperature of the heat exchange device is greater than or equal to 350℃, since the best hydrogen release temperature of most hydrogen storage materials is above 300℃ or even 350℃, therefore, the maximum heating temperature of the heat exchange device should be not less than the best hydrogen release temperature of the hydrogen storage alloy.

[0042] Specifically, the pipeline further comprises a temperature control system, and the heat exchange device is connected with the temperature control system, so that the temperature control is more accurate and timely.

[0043] Further, the hydrogen storage alloy coating can be prepared by using the existing process, such as slurry method. The common slurry method coating preparation process is:

[0044] S1 Preparation of slurry: adding appropriate amount of solvent, adhesive, etc. in coating raw material to prepare slurry with suitable viscosity and concentration;

[0045] S2 Coating slurry: coating slurry on the surface of substrate by spraying or brushing;

[0046] S3 Sintering: drying water in slurry and then sintering at high temperature to further improve the bonding strength between substrate and coating.

[0047] Specifically, for the utility model, the powder after ball milling of hydrogen storage alloy is used as coating raw material and the above method is operated, so that the hydrogen storage alloy coating is obtained.

[0048] The utility model also provides a kind of hydrogen energy production, storage, installation and / or transport equipment, and the equipment includes the pipeline.

[0049] Further, in order to ensure the long-term effectiveness of hydrogen storage alloy coating, the hydrogen storage pipeline or related equipment is checked and maintained every half year, including checking the integrity of coating, detecting the hydrogen absorption and release cycle performance of hydrogen storage alloy, etc. If it is found that the coating is aged or peeled off, it needs to be repaired in time to ensure the safe operation of hydrogen storage pipeline or related equipment.

[0050] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. A pipe having a hydrogen storage alloy coating, characterized by, The pipeline comprises a pipe shell (1), a hydrogen storage alloy coating (2) arranged on the inner surface of the pipe shell (1), and a heat exchange device (3); The heat exchange device (3) is arranged in contact with the outer surface of the pipe shell (1); The heat exchange device (3) is one or more, and the heat exchange device (3) has refrigeration and heating functions.

2. The pipe of claim 1, wherein, The heat exchange device (3) is arranged continuously or discontinuously on the outer surface of the pipe shell (1).

3. The pipe of claim 1, wherein, The pipeline further comprises a temperature control system (4), and the heat exchange device (3) is connected with the temperature control system (4).

4. The pipe of claim 1, wherein, The thickness of the hydrogen storage alloy coating (2) is 0.5-2 mm.

5. The pipe of claim 1, wherein, The hydrogen storage alloy coating (2) is an AB5 type rare earth-transition metal hydrogen storage alloy coating and / or an AB2 type rare earth-transition metal hydrogen storage alloy coating.

6. The pipe of claim 5, wherein, The AB5 type rare earth-transition metal hydrogen storage alloy is LaNi5.

7. The pipe of claim 1, wherein, The heat exchange device (3) is a full-coated heat exchange device.

8. The pipe of claim 1, wherein, The heat exchange device (3) is a semi-coated heat exchange device.

9. The pipe of claim 1, wherein, The pipeline is made of ordinary alloy steel, and the hydrogen absorption working range of the hydrogen storage alloy coating (2) is 0.03 MPa < hydrogen pressure < 140 MPa.

10. A hydrogen energy production, storage, installation and / or transportation equipment, characterized in that, The equipment comprises the pipeline according to any one of claims 1-9.

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