Hydrogen and water mixing and conveying system

Abstract

The utility model discloses a hydrogen and water mixed conveying system, relates to the technical field of hydrogen energy conveying, and aims to solve the problem of high cost of independently laying a hydrogen conveying pipeline. The inlet end of a gas-water two-phase flow pipeline is divided into two paths which are respectively connected with a hydrogen supply pipeline and a water supply pipeline, the outlet end of the gas-water two-phase flow pipeline is connected with a closed water tank, the upper end of the closed water tank is provided with a gas outlet pipe which is communicated with a hydrogen delivery pipeline, and the lower part of the closed water tank is communicated with a water delivery pipeline; the middle of the hydrogen supply pipeline is further connected with a hydrogen buffer tank used for storing a certain amount of hydrogen and stabilizing the pipe network pressure. The end, close to the gas-water two-phase flow pipeline, of the hydrogen supply pipeline is connected with a hydrogen injection device. The upper end of the water supply pipeline is connected with a plurality of vacuumizing devices used for pumping out air in the water supply pipeline. The hydrogen mixed conveying device is simple and reasonable in structure, hydrogen mixed conveying can be achieved through an existing water pipe or a water pipe to be built, and expenditure and building time of a special hydrogen conveying pipeline can be greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen energy transportation, and specifically relates to a hydrogen and water mixed transportation system. Background Technique

[0002] Hydrogen energy is an ideal clean energy with huge development potential. In the field of hydrogen transportation, how to transport hydrogen conveniently, efficiently and safely has become an urgent problem to be solved. At present, the transportation of hydrogen mainly includes three methods: high-pressure storage tank transportation, cryogenic liquid transportation, and pipeline transportation. According to the hydrogen transportation distance, hydrogen demand and the distribution of end-users, considering economy and environmental protection, in the case of large hydrogen transportation volume and long distance, using pipelines to transport hydrogen is the most efficient and economical way.

[0003] The construction of hydrogen pipelines in China is still in its infancy, mainly built in regions such as the Bohai Bay Rim and the Yangtze River Delta. The construction of new hydrogen pipelines requires a large amount of cost and time, and problems such as hydrogen embrittlement need to be considered. If the existing laid pipelines or other resource transportation pipelines to be laid can be used to simultaneously achieve the safe transportation of hydrogen, the resource and time costs can be greatly reduced. Therefore, there is an urgent need for a hydrogen and water mixed transportation system to solve this problem. Content of the Utility Model

[0004] The purpose of the utility model is to provide a hydrogen and water mixed transportation system to solve the problem of the high cost of independently laying hydrogen transportation pipelines.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A hydrogen and water mixed transportation system includes a water supply pipeline and a water transportation pipeline, and also includes a hydrogen supply pipeline, a hydrogen transportation pipeline and a gas-liquid two-phase flow pipeline; wherein the inlet end of the gas-liquid two-phase flow pipeline is divided into two paths and respectively connected to the hydrogen supply pipeline and the water supply pipeline, the outlet end of the gas-liquid two-phase flow pipeline is connected with a sealed water tank, the upper end of which is provided with an air outlet pipe for connecting to the hydrogen transportation pipeline, and the lower part is connected to the water transportation pipeline;

[0006] The middle part of the hydrogen supply pipeline is also connected with a hydrogen buffer tank for storing a certain amount of hydrogen and stabilizing the pipeline network pressure, and one end of the hydrogen supply pipeline close to the gas-liquid two-phase flow pipeline is connected with a hydrogen ejector device; the upper end of the water supply pipeline is connected with a plurality of vacuum pumping devices for pumping out the air in the water supply pipeline.

[0007] Preferably, an air extraction device and a gas-liquid separation device are also connected in the hydrogen transportation pipeline, wherein the air extraction device is connected at one end close to the sealed water tank for providing the power for hydrogen transportation, and there are a plurality of gas-liquid separation devices, which include an air pipe located in the upper part and a liquid collecting funnel located in the lower part, and the lower end of the liquid collecting funnel is connected to the water transportation pipeline through a drain pipe.

[0008] Preferably, a check valve is also connected between the hydrogen ejector device and the gas-water two-phase flow pipeline to prevent water from flowing back into the hydrogen buffer tank.

[0009] Preferably, a diameter-expanding pipe is provided at the inlet end of the gas-water two-phase flow pipeline, and its cross-sectional area is larger than that of the water supply pipeline.

[0010] Preferably, the hydrogen supply pipeline, the hydrogen transmission pipeline, the water supply pipeline, the water transmission pipeline and the gas-water two-phase flow pipeline are all composite pipes made of plastic materials that can prevent hydrogen penetration.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. The hydrogen and water mixed transportation system has a simple and reasonable structure, can realize the mixed transportation of hydrogen by using existing or to-be-built water pipes, and can greatly save the expenditure and construction time of special hydrogen transportation pipelines.

[0013] 2. In the hydrogen and water mixed transportation system, the water, gas, and gas-water two-phase flow pipelines can all adopt plastic composite pipes such as polyethylene, which can avoid hydrogen embrittlement and reduce the hydrogen escape rate, can safely transport hydrogen to each user, and can effectively solve the problem of hydrogen transportation and utilization within the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the system connection relationship of the present utility model.

[0015] In the figure: 11. Hydrogen supply pipeline; 12. Hydrogen transmission pipeline; 21. Water supply pipeline; 22. Water transmission pipeline; 3. Hydrogen buffer tank; 4. Hydrogen ejector device; 5. Vacuum pumping device; 6. Gas-water two-phase flow pipeline; 7. Sealed water tank; 8. Air extraction device; 9. Gas-liquid separation device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Refer to Figure 1 , a hydrogen and water mixed transportation system includes a water supply pipeline 21 and a water transmission pipeline 22, and also includes a hydrogen supply pipeline 11, a hydrogen transmission pipeline 12 and a gas-water two-phase flow pipeline 6; wherein the inlet end of the gas-water two-phase flow pipeline 6 is divided into two paths and is respectively connected to the hydrogen supply pipeline 11 and the water supply pipeline 21, the outlet end of the gas-water two-phase flow pipeline 6 is connected to a sealed water tank 7, the upper end of which is provided with an air outlet pipe for connecting to the hydrogen transmission pipeline 12, and the lower part is connected to the water transmission pipeline 22. The sealed water tank 7 can generally be arranged near the terminal hydrogen user point, that is, the main part of the hydrogen and water mixed transportation is the gas-water two-phase flow pipeline 6;

[0017] In the middle of the hydrogen supply pipeline 11, a hydrogen buffer tank 3 is also connected to store a certain amount of hydrogen and stabilize the pipeline network pressure. One end of the hydrogen supply pipeline 11 close to the gas-liquid two-phase flow pipeline 6 is connected with a hydrogen ejector device 4 for pumping hydrogen into the pipeline of the gas-liquid two-phase flow pipeline 6. For reference, a check valve may also be connected between the hydrogen ejector device 4 and the gas-liquid two-phase flow pipeline 6 to prevent water from flowing back into the hydrogen buffer tank 3; at the upper end of the water supply pipeline 21, a number of vacuum pumping devices 5 are connected to pump out the air in the water supply pipeline 21 to ensure the purity of hydrogen.

[0018] Specifically, an air extraction device 8 and a gas-liquid separation device 9 are also connected in the hydrogen transmission pipeline 12. The air extraction device 8 is connected at one end close to the closed water tank 7 to provide the driving force for hydrogen transmission and extract hydrogen in the water tank. A number of gas-liquid separation devices 9 can be provided, and their structures can include an air pipe located in the upper part and a liquid collection funnel located in the lower part inside. The lower end of the liquid collection funnel is connected to the water transmission pipeline 22 through a drain pipe. Further, a valve member is generally provided in the middle of the drain pipe, and a certain liquid level should be maintained in the drain pipe to avoid hydrogen leakage.

[0019] In a preferred embodiment, a diameter-expanding pipe is provided at the inlet end of the gas-liquid two-phase flow pipeline 6, and its cross-sectional area is larger than that of the water supply pipeline 21, which can ensure the simultaneous transmission of hydrogen and water in the pipeline.

[0020] In addition, for reference, the hydrogen supply pipeline 11, hydrogen transmission pipeline 12, water supply pipeline 21, water transmission pipeline 22 and gas-liquid two-phase flow pipeline 6 in the present utility model are all preferably made of composite pipes of plastic materials that can prevent hydrogen penetration, such as polyethylene.

[0021] The above are only the preferred embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.

[0022] Those not detailed in the present utility model are all well-known technologies to those skilled in the art.

Claims

1. A hydrogen and water mixed transportation system, comprising a water supply pipeline (21) and a water delivery pipeline (22), characterized in that: It also includes a hydrogen supply pipeline (11), a hydrogen transmission pipeline (12), and a gas-water two-phase flow pipeline (6); the inlet end of the gas-water two-phase flow pipeline (6) is divided into two paths and is respectively connected to the hydrogen supply pipeline (11) and the water supply pipeline (21), the outlet end of the gas-water two-phase flow pipeline (6) is connected to a sealed water tank (7), the upper end of which is provided with an outlet pipe for communicating with the hydrogen transmission pipeline (12), and the lower part is connected to the water transmission pipeline (22); In the middle of the hydrogen supply pipeline (11), a hydrogen buffer tank (3) is also connected for storing a certain amount of hydrogen and stabilizing the pipeline network pressure, and a hydrogen ejector device (4) is connected to one end of the hydrogen supply pipeline (11) close to the gas-water two-phase flow pipeline (6); the upper end of the water supply pipeline (21) is connected with a plurality of vacuum pumping devices (5) for pumping out the air in the water supply pipeline (21).

2. The hydrogen and water mixed transportation system according to claim 1, wherein: An air extraction device (8) and a gas-liquid separation device (9) are also connected in the hydrogen transmission pipeline (12), wherein the air extraction device (8) is connected to one end close to the sealed water tank (7) for providing the driving force for hydrogen transmission, and a plurality of gas-liquid separation devices (9) are provided, which include an air pipe located in the upper part and a liquid collection funnel located in the lower part, and the lower end of the liquid collection funnel is connected to the water transmission pipeline (22) through a drain pipe.

3. The hydrogen and water mixed transportation system according to claim 1, wherein: A check valve is also connected between the hydrogen ejector device (4) and the gas-water two-phase flow pipeline (6) for preventing water from flowing back to the hydrogen buffer tank (3).

4. A hydrogen and water mixed transportation system according to claim 1, characterized in that: The inlet end of the gas-water two-phase flow pipeline (6) is provided with an expanded diameter pipe, and its cross-sectional area is larger than that of the water supply pipeline (21).

5. A hydrogen and water mixed transportation system according to claim 1, characterized in that: The hydrogen supply pipeline (11), the hydrogen transmission pipeline (12), the water supply pipeline (21), the water transmission pipeline (22), and the gas-water two-phase flow pipeline (6) are all made of a composite pipe of a plastic material that can prevent hydrogen penetration.

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