HYDROGEN TRANSPORTATION PIPE AND HYDROGEN TRANSPORTATION PIPELINE

Abstract

Embodiments of the present application provide a hydrogen transportation pipe and a hydrogen transportation pipeline. A steel pipe body of the hydrogen transportation pipe has a pipe cavity with a round cross section; an inner wall of the pipe cavity of the steel pipe body is provided with a nano-composite coating used for preventing hydrogen atoms from diffusing into the steel pipe body; and an outer diameter of the steel pipe body is not more than 100 millimeters and a diameter of the pipe cavity of the steel pipe body is not more than 90 millimeters. According to the present application, a hydrogen embrittlement phenomenon can be prevented from occurring in the steel pipe body, and the transportation cost of hydrogen can be effectively reduced and the large-scale commercial application of the hydrogen energy can be further accelerated.

Claims

1. A hydrogen transportation pipe, wherein a steel pipe body (101) of the hydrogen transportation pipe has a pipe cavity (102) with a round cross section; an inner wall of the pipe cavity (102) of the steel pipe body (101) is provided with a nano-composite coating (103) used for preventing hydrogen atoms from diffusing into the steel pipe body; and an outer diameter of the steel pipe body (101) is not more than 100 millimeters and a diameter of the pipe cavity (102) of the steel pipe body (101) is not more than 90 millimeters.

2. The hydrogen transportation pipe according to claim 1, wherein the thickness of the nano-composite coating (103) is from 0.5 microns to 5 microns.

3. The hydrogen transportation pipe according to claim 1, wherein the nano-composite coating (103) is a multi-component coating which is arranged on the inner wall of the pipe cavity (102) of the steel pipe body (101) through a vacuum sputtering coating process.

4. The hydrogen transportation pipe according to claim 3, wherein the nano-composite coating (103) is an alloy coating or a ceramic coating.

5. The hydrogen transportation pipe according to claim 4, wherein the alloy coating is a W/ZnAl coating.

6. The hydrogen transportation pipe according to claim 4, wherein the ceramic coatings are the Al/Al.sub.2O.sub.3 and TiN/AlN coatings.

7. A hydrogen transportation pipeline, wherein the hydrogen transportation pipeline comprises the hydrogen transportation pipe (1) according to claim 1.

8. A hydrogen transportation pipeline, wherein the hydrogen transportation pipeline comprises the hydrogen transportation pipe (1) according to claim 2.

9. A hydrogen transportation pipeline, wherein the hydrogen transportation pipeline comprises the hydrogen transportation pipe (1) according to claim 3.

10. A hydrogen transportation pipeline, wherein the hydrogen transportation pipeline comprises the hydrogen transportation pipe (1) according to claim 4.

11. A hydrogen transportation pipeline, wherein the hydrogen transportation pipeline comprises the hydrogen transportation pipe (1) according to claim 5.

12. A hydrogen transportation pipeline, wherein the hydrogen transportation pipeline comprises the hydrogen transportation pipe (1) according to claim 6.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To describe the technical solutions in the embodiments of the present invention or in the prior art more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description show some embodiments of the present invention, and for a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

[0020] FIG. 1 shows a composition schematic diagram of an application environment of an embodiment of the present application.

[0021] FIG. 2 shows a cross section schematic diagram of a hydrogen transportation pipe in an embodiment of the present application.

[0022] FIG. 3 shows a structural schematic diagram of a hydrogen transportation pipeline in an embodiment of the present application.

[0023] A corresponding relationship between reference numerals in the drawings and part names is as follows: [0024] 1: hydrogen transportation pipe, 101: steel pipe body, 102: pipe cavity, 103: nano-composite coating, 2: transportation pipe coupling piece, 3: valve.

DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0026] FIG. 1 shows a composition schematic diagram of an application environment of an embodiment of the present application. A hydrogen transportation pipe provided by an embodiment of the present application is used for constructing a hydrogen transportation pipeline in an embodiment of the present application; and the hydrogen transportation pipeline in the embodiment of the present application is used for establishing pipeline connection between a hydrogen generator and a hydrogen storage device, or between the hydrogen storage device and a production unit using hydrogen as raw materials, or between the hydrogen storage device and a hydrogen energy generation and utilization unit, so as to realize the transportation of hydrogen.

[0027] Now referring to FIG. 1, the hydrogen generated by the hydrogen generator is transported, by means of the hydrogen transportation pipeline in the embodiment of the present application, into the hydrogen storage device for storage; the hydrogen stored in the hydrogen storage device is transported, by means of the hydrogen transportation pipeline in the embodiment of the present application, into the production unit using hydrogen as raw materials to obtain a corresponding industrial products; and the hydrogen stored in the hydrogen storage device is transported, by means of the hydrogen transportation pipeline in the embodiment of the present application, into the hydrogen energy generation and utilization unit to obtain power energy.

[0028] This application environment may only include the hydrogen generator and the hydrogen storage device. At this time, the application environment of the embodiments of the present application may specifically be a solar hydrogen production plant, a wind-hydrogen production plant, and a tidal-hydrogen production plant.

[0029] This application environment may only include the hydrogen storage device and the production unit using hydrogen as raw materials. At this time, the application environment of the embodiments of the present application may specifically be an industrial production workshop using hydrogen as raw material.

[0030] This application environment may only include the hydrogen storage device and the hydrogen energy generation and utilization unit. At this time, the application environment of the embodiments of the present application may specifically be a hydrogen power plant and a power generation system of hydrogen machinery (e.g. Hydrogen vehicles).

[0031] The composition of the application environment of the embodiments of the present application may be, but not limited to, the composition illustrated in FIG. 1. In practical application, corresponding functional units may be added to the composition illustrated in FIG. 1, so as to realize the corresponding hydrogen production and utilization.

[0032] It should be noted that the hydrogen transportation pipe and the hydrogen transportation pipeline provided by the embodiments of the present application have application scenarios that include, but are not limited to, hydrogen transportation, and they may also be applied to the construction of transportation facilities of other gases, e.g. natural gas.

[0033] FIG. 2 shows a cross section schematic diagram of a hydrogen transportation pipe in an embodiment of the present application.

[0034] Now referring to FIG. 2, in the hydrogen transportation pipe in the embodiment of the present application, a steel pipe body 101 of the hydrogen transportation pipe has a pipe cavity 102 with a round cross section; an inner wall of the pipe cavity 102 of the steel pipe body 101 is provided with a nano-composite coating 103 used for preventing hydrogen atoms from diffusing into the steel pipe body; and an outer diameter of the steel pipe body 101 is not more than 100 millimeters and a diameter of the pipe cavity 102 of the steel pipe body 101 is not more than 90 millimeters.

[0035] In a possible implementation, the material of the steel pipe body 101 may be the steel used for gas (e.g. natural gas) pipe manufacturing, e.g. stainless steel and carbon steel. Certainly, alloy steel may be adopted regardless of the cost, and be specifically determined according to application scenarios; and the structure of the steel pipe body 101 is a seamless steel pipe structure to ensure that the steel pipe body 101 has better mechanical properties.

[0036] In a possible implementation, the cross section of the pipe cavity 102 of the steel pipe body 101 of the hydrogen transportation pipe is round, and the steel pipe body 101 is of a round pipe structure. On one hand, pipeline joints of the steel pipe body 101 with the round pipe structure are the same as those of the hydrogen generator, the hydrogen storage device, the production unit using hydrogen as raw materials, and the hydrogen energy generation and utilization unit in terms of standards, which is convenient for adaptation and improves the system compatibility of the hydrogen transportation pipe. On the other hand, when the steel pipe body 101 with the round pipeline structure serves as a constituent part of the hydrogen transportation pipeline, the pressure inside the pipe cavity is distributed uniformly, and hydrogen are distributed uniformly, so as to not only facilitate the flowing of the hydrogen, but also facilitate a near uniform stress from a hydrogen flow on the nano-composite coating 103, thereby prolonging the service life of the nano-composite coating 103.

[0037] In a possible implementation, the outer diameter of the steel pipe body 101 is not more than 100 millimeters and the diameter of the pipe cavity 102 of the steel pipe body 101 is not more than 90 millimeters. On one hand, the hydrogen transportation pipe in the embodiment of the present application may be manufactured by adopting a commercially available standard steel pipe to reduce the cost of raw materials; on the other hand, the hydrogen transportation pipe in the embodiment of the present application may be obtained by adopting a steel pipe processing technology commonly used in the industry to reduce the cost of production.

[0038] In a possible implementation, the nano-composite coating 103 can prevent hydrogen atoms from diffusing into the steel pipe body, and is a multi-component coating which is arranged on an inner wall of the pipe cavity 102 of the steel pipe body 101 through a vacuum sputtering coating process. Its thickness may specifically be from 0.5 microns to 5 microns.

[0039] Specifically, various coating materials are prepared into a cathode target, for example, various coating materials such as Al (Aluminum) metal, W (Tungsten) metal, Zn (Zinc) metal, and Ti (Titanium) metal are prepared into a cathode target. The vacuum sputtering process is carried out in a vacuum chamber to form the multi-component nano-composite coating 103 by the following steps: (1) introducing argon or other inert gas into the vacuum chamber to get the pressure of 0.1 Pa to 10 Pa after the ultimate vacuum with 1×10.sup.−5 Pa; (2) taking the resulting target as a cathode and taking the inner wall of the pipe cavity 102 of the steel pipe body 101 as an anode; applying direct-current negative high voltage of 1 KV to 3 KV or radio frequency voltage of 13.56 MHz to the cathode target to generate a glow discharge; (3) the atoms are ejected from a target and are deposited on the inner wall of the pipe cavity 102 of the steel pipe body 101 and the formation of the nano-composite coating 103 occurs as a result of the bombardment of the target by argon ions obtained by ionizing the argon. In a case that only argon is introduced into the vacuum chamber, the obtained nano-composite coating 103 is an alloy coating, e.g. a W/ZnAl coating. In a case that the reactive gas (such as oxygen and nitrogen) is introduced into the vacuum chamber with a certain pressure with or without the addition of argon, the ionized reactive gas can react chemically with the atoms ejected from a target, which produce a molecular compound which then becomes the deposited metal oxides (e.g. Al.sub.2O.sub.3) or metal nitride (e.g. TiN) nano-composite coating 103 on the inner wall of the pipe cavity 102 of the steel pipe body 101. The nano-composite coating 103 is a ceramic coating, e.g. the Al/Al.sub.2O.sub.3 or TiN/AlN coating.

[0040] In a case that the alloy coating is the W/ZnAl coating or the ceramic coatings are the Al/Al.sub.2O.sub.3 and TiN/AlN coatings, the nano-composite coating 103 not only has advantages such as dense structure, high hardness and good friction resistance, but can also more effectively prevent the hydrogen atoms from permeating and diffusing into the steel pipe body so as to effectively prevent a hydrogen embrittlement phenomenon from occurring in the steel pipe body.

[0041] The hydrogen transportation pipeline in the embodiment of the present application includes the hydrogen transportation pipe provided by the embodiment of the present application.

[0042] FIG. 3 shows a structural schematic diagram of a hydrogen transportation pipeline in an embodiment of the present application.

[0043] Now referring to FIG. 3, the hydrogen transportation pipeline is a device for transporting hydrogen, which is formed by coupling a hydrogen transportation pipe 1, a transportation pipe coupling piece 2, and a valve 3.

[0044] In a possible implementation, the valve 3 and the transportation pipe coupling piece 2 are corresponding parts used for a gas pipeline (e.g. a natural gas pipeline), in which the transportation pipe coupling piece 2 may specifically be a flange.