Hydrogen high-pressure conveying pipeline for fuel cell vehicle

Abstract

The utility model relates to the field of petrochemical engineering, and discloses a hydrogen high-pressure conveying pipeline for a fuel cell vehicle, which comprises a hydrogen boosting unit and a hydrogen conveying unit, specifically, the hydrogen boosting unit comprises a compressor, a gas inlet safety valve and a buffer tank, and the hydrogen conveying unit comprises a regulating valve, a pressure reducing pore plate, a pressure transmitter and a gas outlet safety valve. The compressor can increase the pressure of the hydrogen to 20-36 MPa. Compared with the prior art, by arranging the compressor and the buffer tank, the gas pressure in the pipeline is stabilized, high-pressure gas transmission of the product hydrogen is achieved, the treated high-pressure hydrogen can be directly conveyed to a nearby gas station through the micro pipe, hydrogen transportation is more stable, and production cost control is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical industry, in particular to a high-pressure hydrogen transmission pipeline for fuel cell vehicles. Background Art

[0002] Hydrogen energy is an energy source with high energy density, no pollution, wide sources and clean and efficient, and has very promising application prospects. The efficient conversion of chemical energy into electrical energy by means of fuel cells has been widely used in various hydrogen fuel cell vehicles.

[0003] The crude hydrogen produced by petrochemical enterprises is purified to obtain high-purity hydrogen and then sent to the gas filling station. The existing gas transmission pipeline completes the hydrogen transmission under a pressure of about 3 MPa. Therefore, how to optimize the gas transmission pipeline to enable safe and stable gas transmission under a high-pressure environment (20 - 36 MPa) is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0004] To solve the above technical problems, the purpose of the utility model is to provide a high-pressure hydrogen transmission pipeline for fuel cell vehicles, which can achieve long-term and stable transportation of high-pressure hydrogen, realize the direct transportation of product hydrogen, and reduce production costs.

[0005] Based on this, the utility model provides a high-pressure hydrogen transmission pipeline for fuel cell vehicles, which includes a hydrogen boosting unit and a hydrogen transmission unit. The hydrogen boosting unit includes a compressor, an intake safety valve and a buffer tank. The hydrogen transmission unit includes a regulating valve, a pressure-reducing orifice plate, a pressure transmitter and an outlet safety valve. The compressor can boost the hydrogen pressure to 20 - 36 MPa.

[0006] In some embodiments of the present application, a hydrogen filling unit is further included. The hydrogen filling unit includes a plurality of hydrogen filling columns, and each hydrogen filling column is respectively connected to the hydrogen transmission unit.

[0007] In some embodiments of the present application, two groups of intake safety valves are provided, and at least one group of intake safety valves is in the startup state.

[0008] In some embodiments of the present application, two groups of outlet safety valves are provided, and at least one group of outlet safety valves is in the startup state.

[0009] In some embodiments of the present application, an intake emergency cut-off valve is further provided between the compressor and the buffer tank.

[0010] In some embodiments of the present application, an outlet emergency cut-off valve is provided behind the buffer tank.

[0011] In some embodiments of the present application, a plurality of compressors are provided, and each compressor is sequentially arranged in front of the buffer tank.

[0012] In some embodiments of the present application, the compressor is a diaphragm compressor or a liquid-driven compressor.

[0013] Compared with the prior art, the beneficial effects of a high-pressure hydrogen delivery pipeline for a fuel cell vehicle provided by an embodiment of the present utility model are as follows:

[0014] The present utility model provides a high-pressure hydrogen delivery pipeline for a fuel cell vehicle, which includes a hydrogen boosting unit and a hydrogen delivery unit. Specifically, the hydrogen boosting unit includes a compressor, an inlet safety valve, and a buffer tank, and the hydrogen delivery unit includes a regulating valve, a pressure-reducing orifice plate, a pressure transmitter, and an outlet safety valve. The compressor can boost the hydrogen pressure to 20 - 36 MPa. Based on the above structure, this application is used to connect to a hydrogen purification unit and deliver the product hydrogen prepared by the hydrogen purification unit to a gas filling station. The product hydrogen produced by the hydrogen purification unit is transported to the buffer tank through the compressor. The pressure of the product hydrogen reaches 22 - 37 MPa after being compressed by the compressor, and then enters the buffer tank through the inlet safety valve. The opening pressure of the inlet safety valve is the design pressure of the buffer tank. The product hydrogen flowing out of the buffer tank is transported through a stainless steel pipeline more than 1 km long to the hydrogen loading station for loading and external sales. The regulating valve after the buffer tank can adjust the gas flow rate to stabilize the pressure in the buffer tank at 19.5 MPa or other preset pressure values such as 36 MPa. The pressure-reducing orifice plate can reduce the product hydrogen from 22 MPa (or 37 MPa) to 3 MPa to meet the gas filling requirements. The pressure transmitter can monitor the pressure after the pressure-reducing orifice plate in real time and provide an alarm when the pressure-reducing orifice plate fails. The outlet safety valve can open or close the pipeline in time to prevent hydrogen from being released when the pressure-reducing orifice plate fails. In this way, this application stabilizes the gas pressure in the pipeline by setting a compressor and a buffer tank, realizes the high-pressure gas transmission of product hydrogen, and the processed high-pressure hydrogen can be directly transported to a nearby gas filling station through a microtube. The transportation of hydrogen is safer and more stable, which is beneficial to controlling production costs. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the high-pressure hydrogen delivery pipeline for a fuel cell vehicle according to an embodiment of the present application.

[0016] In the figure, 1. Compressor; 2. Inlet safety valve; 3. Inlet emergency cut-off valve; 4. Buffer tank; 5. Regulating valve; 6. Pressure-reducing orifice plate; 7. Pressure transmitter; 8. Outlet safety valve; 9. Outlet emergency cut-off valve; 10. Hydrogen filling column. Detailed Embodiments

[0017] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0018] It should be understood that in the present utility model, terms such as "front" and "rear" are used to describe various information, but such information should not be limited to these terms, and these terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present utility model, "front" information can also be referred to as "rear" information, and "rear" information can also be referred to as "front" information.

[0019] As Figure 1 shown, the present utility model provides a high-pressure hydrogen transmission pipeline for a fuel cell vehicle, including a hydrogen boosting unit and a hydrogen transmission unit. Specifically, the hydrogen boosting unit includes a compressor 1, an intake safety valve 2, and a buffer tank 4, and the hydrogen transmission unit includes a regulating valve 5, a pressure-reducing orifice plate 6, a pressure transmitter 7, and an outlet safety valve 8. The compressor 1 can boost the pressure of hydrogen to 20 - 22 MPa.

[0020] Based on the above structure, the present application is used to connect to a hydrogen purification unit and transport the product hydrogen prepared by the hydrogen purification unit to a gas filling station. The product hydrogen produced by the hydrogen purification unit is transported to the buffer tank 4 through the compressor 1. The pressure of the product hydrogen reaches 22 or 37 MPa after being compressed by the compressor 1, and then enters the buffer tank 4 through the intake safety valve 2. The opening pressure of the intake safety valve 2 is the design pressure of the buffer tank 4. The product hydrogen flowing out of the buffer tank 4 is transported through a stainless steel pipeline of more than 1 km to the hydrogen loading station for loading and external sales. The regulating valve 5 after the buffer tank 4 can adjust the gas flow rate to stabilize the pressure in the buffer tank 4 at 19.5 MPa or other preset pressure values such as 36 MPa. The pressure-reducing orifice plate 6 can reduce the pressure of the product hydrogen from 22 MPa (or 37 MPa) to 3 MPa to meet the gas filling requirements. The pressure transmitter 7 can monitor the pressure behind the pressure-reducing orifice plate 6 in real time and provide an alarm when the pressure-reducing orifice plate 6 fails. The outlet safety valve 8 can open or close the pipeline in time to prevent hydrogen from being released when the pressure-reducing orifice plate 6 fails. In this way, the present application stabilizes the gas pressure in the pipeline by setting the compressor 1 and the buffer tank 4, realizes the high-pressure gas transmission of the product hydrogen, and the processed high-pressure hydrogen can be directly transported to a nearby gas filling station through a microtube. The transportation of hydrogen is more stable, which is beneficial to controlling production costs.

[0021] Optionally, in some embodiments of the present application, an intake emergency cut-off valve 3 is provided between the compressor 1 and the buffer tank 4, and an outlet emergency cut-off valve 9 is provided after the buffer tank 4. The emergency cut-off valve is provided with local manual and remote operation buttons, which can directly cut off the pipeline to avoid hydrogen leakage.

[0022] Furthermore, for the intake safety valve 2 of the present application, there are two sets of it, and the states of the two sets of intake safety valves 2 are opposite, that is, when one set of intake safety valves 2 is activated, the other set of intake safety valves 2 is in a standby state, so as to improve the prevention effect on sudden situations.

[0023] Corresponding to the intake safety valve 2, the present application is provided with two groups of outlet safety valves 8, and at least one group of outlet safety valves 8 is in a startup state. That is, the states of the two groups of intake safety valves 2 are opposite. When one group of intake safety valves 2 is started, the other group of intake safety valves 2 is in a standby state.

[0024] In addition, for the compressor 1 of the present application, multiple compressors 1 can be provided and each compressor 1 is located before the buffer tank 4. The multiple compressors 1 can compress the gas in stages to improve the pressure boosting effect. Specifically, in the embodiment of the present utility model, the compressor 1 is a diaphragm compressor or a liquid-driven compressor.

[0025] In fact, in order to ensure the normal use of the high-pressure hydrogen transmission pipeline of the present application, after repeated tests and experiments, the length of the high-pressure hydrogen transmission pipeline is limited to 0.1 - 10.0 km.

[0026] In summary, the present utility model provides a high-pressure hydrogen transmission pipeline for a fuel cell vehicle, which includes a hydrogen pressure boosting unit and a hydrogen transmission unit. Specifically, the hydrogen pressure boosting unit includes a compressor 1, an intake safety valve 2, and a buffer tank 4. The hydrogen transmission unit includes a regulating valve 5, a pressure-reducing orifice plate 6, a pressure transmitter 7, and an outlet safety valve 8. The compressor 1 can boost the pressure of hydrogen to 20 - 36 MPa. Compared with the prior art, the present application stabilizes the gas pressure in the pipeline by setting the compressor 1 and the buffer tank 4, realizes the high-pressure gas transmission of the product hydrogen, and the processed high-pressure hydrogen can be directly microtubed to a nearby gas station. The transportation of hydrogen is more stable, which is beneficial to controlling the production cost.

[0027] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present utility model.

Claims

1. A high-pressure hydrogen transmission pipeline for a fuel cell vehicle, characterized in that, It includes a hydrogen boosting unit and a hydrogen delivery unit. The hydrogen boosting unit includes a compressor (1), an inlet safety valve (2), and a buffer tank (4). The hydrogen delivery unit includes a regulating valve (5), a pressure-reducing orifice plate (6), a pressure transmitter (7), and an outlet safety valve (8). The compressor (1) can boost the pressure of hydrogen to 20 - 36 MPa.

2. The high-pressure hydrogen delivery pipeline for a fuel cell vehicle according to claim 1, wherein It further includes a hydrogen addition unit, and the hydrogen addition unit includes a plurality of hydrogenation columns (10), and each of the hydrogenation columns (10) is respectively connected to the hydrogen delivery unit.

3. The high-pressure hydrogen delivery pipeline for a fuel cell vehicle according to claim 1, characterized in that There are two groups of the inlet safety valves (2), and at least one group of the inlet safety valves (2) is in the startup state.

4. The high-pressure hydrogen delivery pipeline for a fuel cell vehicle according to claim 3, characterized in that, There are two groups of the outlet safety valves (8), and at least one group of the outlet safety valves (8) is in the startup state.

5. The high-pressure hydrogen delivery pipeline for a fuel cell vehicle according to claim 1, wherein An inlet emergency cut-off valve (3) is further provided between the compressor (1) and the buffer tank (4).

6. The high-pressure hydrogen delivery pipeline for a fuel cell vehicle according to claim 5, wherein An outlet emergency cut-off valve (9) is provided behind the buffer tank (4).

7. The high-pressure hydrogen delivery pipeline for a fuel cell vehicle according to claim 1, wherein There are a plurality of the compressors (1), and each of the compressors (1) is sequentially arranged before the buffer tank (4).

8. The high-pressure hydrogen transmission pipeline for a fuel cell vehicle according to claim 7, characterized in that, The compressor (1) is a diaphragm compressor, a liquid-driven compressor, or an ionic compressor.

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