One-stop water vapor hydrogen production and hydrogenation system

Abstract

The utility model discloses a one-stop water vapor hydrogen production and hydrogenation system. A water vapor supply device, a hydrogen production assembly, a purification device and a buffer tank are sequentially connected through pipelines, saturated water vapor provided by the water vapor supply device enters the hydrogen production assembly, and the saturated water vapor generates hydrogen containing a little water vapor through the hydrogen production assembly; hydrogen containing a small amount of water vapor passes through the purification device and the buffer tank and then meets the hydrogen purity requirement of the hydrogen refueling station; a plurality of hydrogen conveying pipelines are arranged at the outlet end of the buffer tank, one or more devices of a compressor, a hydrogen storage device and a hydrogenation device / hydrogen export pipeline are arranged on the hydrogen conveying pipelines, and the hydrogen conveying pipelines provide hydrogen with various pressures. The device has the beneficial effects that the design is reasonable, the produced hydrogen does not need to be stored and transported, and the storage and transportation risk and transportation cost are reduced; the production process is stable, efficient and safe, and integration of hydrogen production, pressurization and hydrogenation is realized.

Description

Technical Field

[0001] The utility model relates to a water vapor hydrogen production system, in particular to a one-stop water vapor hydrogen production and hydrogenation system, belonging to the technical field of comprehensive application of hydrogen energy and new energy. Background Technique

[0002] Hydrogen refueling stations generally use high-pressure gaseous hydrogen storage. Cryogenic liquid hydrogen is mainly used as the fuel for space rocket boosters. Its storage tanks and trailers have been applied in China's aerospace and other fields. With the continuous maturity of technology, liquid hydrogen storage is expected to become the main storage form of industrial hydrogen. With the continuous increase in the number of hydrogen fuel cell vehicles, the number of domestic hydrogen refueling stations has increased significantly.

[0003] Hydrogen, as the raw material of a hydrogen refueling station, its supply source directly affects the hydrogen supply cost and operation cost of the hydrogen refueling station.

[0004] Currently, the hydrogen source of hydrogen refueling stations generally reaches the hydrogen refueling station through transportation from hydrogen production plants. The transportation methods mostly include hydrogen trailer transportation (tube trailer), gaseous hydrogen pipeline transportation (pipeline), and liquid hydrogen tanker transportation (liquid truck). Long tube trailer transportation: The current mainstream hydrogen transportation method, but the transportation efficiency is not high, and the economy is restricted by distance. Pipeline transportation: It can achieve low-cost hydrogen transportation, but hydrogen refueling stations are restricted by the laying direction of the pipe network. Liquid hydrogen tanker transportation: Suitable for long-distance transportation. The transportation efficiency of liquid hydrogen is higher than that of gaseous hydrogen, but the transportation cost is high; since the transportation temperature of liquid hydrogen needs to be maintained below -253°C, there is a large temperature difference from the external environment. To ensure the sealing and heat insulation performance of liquid hydrogen storage, there are high requirements for the materials and processes of liquid hydrogen storage tanks, resulting in a relatively high initial investment cost. Moreover, the energy consumption for producing liquid hydrogen is relatively large (the power consumption for liquefying hydrogen with the same calorific value is more than 11 times that of compressing hydrogen), and there are certain evaporation losses during the storage and transportation of liquid hydrogen.

[0005] Electrolytic water hydrogen production is a green hydrogen energy production method with development potential. In particular, using renewable energy for electrolytic water hydrogen production is the process with the lowest carbon emissions among current hydrogen source solutions, which is most consistent with the global low-carbon emission reduction energy development trend. Currently, there are mainly three technical routes for electrolytic water hydrogen production: alkaline electrolysis (AWE), proton exchange membrane (PEM) electrolysis, and solid oxide (SOEC) electrolysis.

[0006] Among them, the alkaline electrolytic water hydrogen production technology is relatively the most mature and has a lower cost, and has been widely applied. The disadvantages are that it needs to remove alkali when producing gas and requires a stable power supply, and the cost is restricted by electricity charges. The PEM electrolytic water hydrogen production technology has been applied on a small scale, and it can adapt to the volatility of renewable energy power generation, with high efficiency and good development prospects. However, due to the need to use rare metals such as platinum and iridium, the cost is relatively high, and the supply chain has large limitations. The solid oxide electrolytic water hydrogen production is mainly in the stage of technical research and has not been commercialized yet. Summary of the Utility Model

[0007] To overcome the above-mentioned deficiencies existing in the existing hydrogen production system and hydrogen transportation, the present utility model provides a one-stop steam hydrogen production and hydrogenation system.

[0008] The technical solution adopted by the present utility model to solve its technical problems is: a one-stop steam hydrogen production and hydrogenation system, including a steam supply device, characterized in that: the steam supply device, the hydrogen production assembly, the purification device, and the buffer tank are sequentially connected through pipelines; the outlet end of the buffer tank is provided with more than 2 hydrogen transportation pipelines, and one or more devices among a compressor, a hydrogen storage device, and a hydrogenation device / export pipeline are provided on the hydrogen transportation pipelines, and multiple hydrogen transportation pipelines respectively provide hydrogen at different pressures.

[0009] The hydrogen production assembly includes a metal cracking reaction vessel, a condensation device, and a gas-liquid separator that are sequentially connected and arranged.

[0010] The pressure at the outlet end of the buffer tank is 2 - 5 MPa.

[0011] The outlet end of the buffer tank is connected to the hydrogen transportation pipeline III, and the other end of the hydrogen transportation pipeline III is communicated with the hydrogen export pipeline.

[0012] The outlet end of the buffer tank is connected to the hydrogen transportation pipeline I that is sequentially provided with a booster I and a hydrogen storage device I. The pressures of the booster I and the hydrogen storage device I are both 21 MPa, and the outlet end of the hydrogen storage device I is connected to the hydrogenation device I.

[0013] The outlet end of the buffer tank is connected to the hydrogen transportation pipeline II that is sequentially provided with a booster II and a hydrogen storage device II. The pressures of the booster II and the hydrogen storage device II are both 45 MPa, and the outlet end of the hydrogen storage device II is connected to the hydrogenation device I.

[0014] On the pipeline connecting the outlet end of the hydrogen storage device II and the hydrogenation device II, a compressor III and a hydrogen storage device III are sequentially arranged. The pressures of the compressor III and the hydrogen storage device III are both 90 MPa.

[0015] The outlet end of the hydrogen storage device I is connected to the inlet end of the booster II.

[0016] A hydrogen purity detector is provided on the outlet pipeline of the buffer tank.

[0017] The hydrogen production and hydrogenation system is provided with more than 2 skids, and the steam supply device, the hydrogen production assembly, the purification device, the buffer tank, the compressor, the hydrogen storage device, and the hydrogenation device are arranged on the skids.

[0018] The beneficial effects of the present utility model are as follows: reasonable design, no need to store and transport the produced hydrogen, reducing storage and transportation risks and transportation costs; stable, efficient and safe production process, realizing integration of hydrogen production, pressurization and hydrogenation; capable of green hydrogen production and completing the construction of a zero-carbon hydrogen production and hydrogenation integrated station; adopting a skid-mounted structure, which can be flexibly arranged, facilitating installation, disassembly, maintenance and repair. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the one-stop steam hydrogen production and hydrogenation system of the present utility model.

[0020] In the figure: 1. Steam supply device, 2. Hydrogen production assembly, 3. Purification device, 4. Buffer tank, 5. Booster I, 6. Booster II, 7. Compressor III, 8. Hydrogen storage device I, 9. Hydrogen storage device II, 10. Hydrogen storage device III, 11. Hydrogenation device I, 12. Hydrogenation device II, 13. Mode I, 14. Mode II, 15. Mode III, 16. Mode IV, 17. Mode V, 18. Mode VI, 19. Metal cracking reaction vessel, 20. Condensing device, 21. Gas-liquid separator, 22. Sales pipeline, 23. Hydrogen transmission pipeline III, 24. Hydrogen transmission pipeline I, 25. Hydrogen transmission pipeline II, 26. Raw gas pressurization equipment, 27. Purification equipment. Specific Embodiments

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments. However, those skilled in the art should be aware that the present utility model is not limited to the specific embodiments listed, and as long as it conforms to the spirit of the present utility model, it should be included within the protection scope of the present utility model.

[0022] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "left", "right", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing or simplifying the description of the present utility model, 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 therefore should not be construed as a limitation to the present utility model.

[0023] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, a direct connection, an indirect connection, or an integral connection; it can be a mechanical connection, can also be indirectly connected through an intermediate medium, and can also be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] See the attachedFigure 1 The one-stop steam hydrogen production and hydrogenation system of the utility model includes a steam supply device 1, a hydrogen production assembly 2, a purification device 3, a buffer tank 4, a hydrogen compression device, a hydrogen storage device, and a hydrogenation device. The steam supply device 1, the hydrogen production assembly 2, the purification device 3, and the buffer tank 4 are sequentially connected through pipelines.

[0025] Furthermore, the hydrogen production assembly 2 includes a metal cracking reaction vessel 19, a condensation device 20, and a gas-liquid separator 21 that are sequentially connected. The condensation device 20 and the gas-liquid separator 21 separate the steam in the hydrogen generated by the metal cracking reaction vessel 19. The purification device 3 is a raw material gas pressurization device 26 and a purification device 27 that are sequentially connected, which further separates the steam in the hydrogen to improve the purity of the hydrogen. The pressure at the outlet end of the buffer tank 4 is 2-5 MPa.

[0026] Specifically, the 160-180 °C saturated steam provided by the steam supply device 1 enters the hydrogen production assembly 2 and undergoes a series of chemical and electrochemical reactions with the composite metal material in the metal cracking reaction vessel 19 of the hydrogen production device 2 to generate hydrogen containing a little steam; the hydrogen containing a little steam passes through the condensation device 20 and the gas-liquid separator 21 to remove most of the steam therein, and the purity reaches ≥94%; the hydrogen with a purity of ≥94% enters the purification device 3 to further remove steam to improve the purity of the hydrogen, and the hydrogen purity reaches 99.999%, meeting the hydrogen purity requirements for hydrogen filling stations. After that, the hydrogen passes through the buffer 4 to stabilize the pressure and flow, and enters the hydrogen transmission pipeline.

[0027] The steam supply device 1 obtains 160-180 °C saturated steam by different production methods according to the actual situation on site. For example: Mode I 13 is the production method of using grid electricity + electric steam boiler + water; Mode II 14 is the production method of using natural gas + gas steam boiler + water; Mode III 15 is the production method of using fuel + fuel steam boiler + water; Mode IV 16 is the production method of using wind-solar green electricity + electric heat storage steam boiler + water; Mode V 17 is the production method of using electric heating start + partial recycling of self-produced hydrogen + pure hydrogen steam boiler + water; Mode VI 18 is the production method of using purchased surplus steam from the surrounding area as the steam source. Among them: the wind-solar green electricity + electric heat storage steam boiler + water in Mode IV 16 and the electric heating start + partial recycling of self-produced hydrogen + pure hydrogen steam boiler + water in Mode V 17 are green steam production methods; other green steam production methods such as biomass can also be used to achieve green hydrogen production and meet the construction requirements of a zero-carbon green hydrogen production and hydrogenation integrated station.

[0028] There are more than 2 hydrogen transmission pipelines at the outlet end of the buffer tank 4. The hydrogen transmission pipelines are provided with one or more devices among a compressor, a hydrogen storage device, a hydrogenation device / hydrogen external sales pipeline. The multiple hydrogen transmission pipelines provide hydrogen with multiple different pressures.

[0029] According to the needs of hydrogen production and hydrogenation, a buffer tank with a matching pressure can be set on the hydrogen pipeline to ensure the stability of hydrogen transportation.

[0030] Furthermore, the outlet end of the buffer tank 4 is connected to the hydrogen pipeline III 23, and the other end of the hydrogen pipeline III 23 is communicated with the external sales pipeline 22 of hydrogen, realizing the external sales of hydrogen through the pipeline.

[0031] Furthermore, the outlet end of the buffer tank 4 is connected to the hydrogen pipeline I 24 successively provided with a booster I 5 and a hydrogen storage device I 8. The pressures of the booster I 5 and the hydrogen storage device I 8 are both 21 MPa, and the outlet end of the hydrogen storage device I 8 is connected to the hydrogenation device I 11.

[0032] Furthermore, the outlet end of the buffer tank 4 is connected to the hydrogen pipeline II 25 successively provided with a booster II 6 and a hydrogen storage device II 9. The pressures of the booster II 6 and the hydrogen storage device II 9 are both 45 MPa, and the outlet end of the hydrogen storage device II 9 is connected to the hydrogenation device I 11. The hydrogenation device I 11 can provide hydrogen with a pressure of 20 - 35 MPa.

[0033] Furthermore, on the connecting pipeline between the outlet end of the hydrogen storage device II 9 and the hydrogenation device II 12, a compressor III 7 and a hydrogen storage device III 10 are successively arranged. The pressures of the compressor III 7 and the hydrogen storage device III 10 are both 90 MPa, and the hydrogen storage device III 10 can provide hydrogen with a pressure of 70 MPa.

[0034] The outlet end of the hydrogen storage device I 8 is connected to the inlet end of the booster II 6 to supply hydrogen to the hydrogen storage device II 9.

[0035] The outlet end of the hydrogen storage device III 10 is connected to the hydrogenation device I 11.

[0036] The utility model can also increase, decrease or change the settings of the hydrogen pipeline on the basis of the existing hydrogen pipeline according to the needs of hydrogen-consuming vehicles to meet the market demand for hydrogen.

[0037] A hydrogen purity detector can be set on the outlet pipeline of the buffer tank 4. The hydrogen purity detector is an automatic detector controlled by a control system; or a manual hydrogen sampling device can be set on the outlet pipeline of the buffer tank 4 to sample and detect the hydrogen purity at the outlet of the buffer tank 4.

[0038] Pneumatic (electric) / manual valves are set on all the connecting pipelines in the hydrogen production and hydrogenation system to facilitate the control and management during the operation of the system.

[0039] For the convenience of establishing a one-stop steam hydrogen production and hydrogenation system, the hydrogen production and hydrogenation system adopts a skid-mounted structure and is provided with more than 2 skid bases. The steam supply device 1, the hydrogen production assembly 2, the purification device 3, the buffer tank 4, the compressor, the hydrogen storage device, and the hydrogenation device are arranged on the skid bases. The number of skid bases is set according to the actual on-site needs. The devices are connected by pipelines, which is convenient for disassembly and assembly, and is conducive to the layout, installation, transportation, and maintenance of the hydrogen production and hydrogenation system.

[0040] The hydrogen production and hydrogenation system is also provided with supporting safety manifolds, water-cooled manifolds, condensate manifolds, purge manifolds, monitoring equipment, and control systems, etc. The safety manifold is used to ensure the safe operation of the hydrogen production and hydrogenation system; the water-cooled manifold and the condensate manifold are used to discharge the condensate generated during the hydrogen production process; the purge manifold is used for cleaning the hydrogen production device; the monitoring equipment is used to monitor the real-time data during the operation of the hydrogen production and hydrogenation system; the control system is used for the whole-process control of the operation process of the hydrogen production and hydrogenation system.

[0041] Embodiment

[0042] The one-stop steam hydrogen production and hydrogenation system of the present utility model (as Figure 1 shown), the steam supply device 1, the hydrogen production assembly 2, the purification device 3, and the buffer tank 4 are sequentially connected by pipelines. Specifically,

[0043] The steam supply device 1 adopts the mode of Ⅴ17 electric heating start + partial recycling of self-produced hydrogen + pure hydrogen steam boiler + water as the green steam production method to realize the production of green hydrogen.

[0044] The hydrogen production assembly 2 includes a metal cracking reaction vessel 19, a condensation device 20, and a gas-liquid separator 21 that are sequentially connected and arranged.

[0045] The purification device 3 is a raw material gas booster device 26 and a purification device 27 that are sequentially connected.

[0046] Pneumatic / manual valves are arranged on the connecting pipelines between the interconnected devices in the hydrogen production and hydrogenation system, which is convenient for the monitoring and control management during the operation of the system.

[0047] A hydrogen purity detector and a manual hydrogen sampling device are arranged on the outlet pipeline of the buffer tank 4 to detect the hydrogen purity at the outlet of the buffer tank 4.

[0048] The 165°C saturated steam provided by the steam supply device 1 enters the hydrogen production assembly 2 and undergoes a series of chemical and electrochemical reactions with the composite metal material in the metal cracking reaction vessel 19 of the hydrogen production device 2, generating hydrogen containing a small amount of steam. After the hydrogen containing a small amount of steam passes through the condensation device 20 and the gas-liquid separator 21 to remove most of the steam therein, hydrogen with a purity of 95%, a pressure of 0.3 MPa, and a temperature of 46°C is obtained. The hydrogen with a purity of 95% enters the purification device 3 to further remove the moisture in the hydrogen and improve the hydrogen purity, so that the hydrogen purity reaches 99.999%, meeting the hydrogen purity requirements for hydrogen refueling stations. Then, the hydrogen passes through the buffer 4 to stabilize the pressure and flow rate, and hydrogen with an output pressure of 4 MPa enters the hydrogen transmission pipeline.

[0049] At the outlet end of the buffer 4, there are three hydrogen transmission pipelines, namely hydrogen transmission pipeline I 24, hydrogen transmission pipeline II 25, and hydrogen transmission pipeline III 23, which can respectively transport hydrogen with different pressures to the hydrogenation device / hydrogen external sales pipeline. Specifically,

[0050] The outlet end of the hydrogen transmission pipeline III 23 is connected to the external sales pipeline 22 of hydrogen, realizing the external sales of hydrogen through the pipeline.

[0051] On the hydrogen transmission pipeline I 24, a booster I 5 and a hydrogen storage device I 8 are successively arranged. The pressures of both the booster I 5 and the hydrogen storage device I 8 are 21 MPa, and the outlet end of the hydrogen storage device I 8 is connected to the hydrogenation device I 11.

[0052] On the hydrogen transmission pipeline II 25, a booster II 6 and a hydrogen storage device II 9 are successively arranged. The pressures of both the booster II 6 and the hydrogen storage device II 9 are 45 MPa, and the outlet end of the hydrogen storage device II 9 is connected to the hydrogenation device I 11.

[0053] The hydrogenation device I 11 can provide hydrogen with pressures of 20 MPa and 35 MPa, and can provide hydrogen with a pressure of 20 MPa for the long tube trailer and hydrogen with a pressure of 35 MPa for vehicles such as logistics vehicles and heavy trucks.

[0054] On the pipeline connecting the outlet end of the hydrogen storage device II 9 of the hydrogen transmission pipeline II 25 to the hydrogenation device II 12, a compressor III 7 and a hydrogen storage device III 10 are successively arranged. The pressures of both the compressor III 7 and the hydrogen storage device III 10 are 90 MPa, and the hydrogen storage device III 10 can provide hydrogen with a pressure of 70 MPa, which can provide hydrogen with a pressure of 70 MPa for passenger cars.

[0055] The outlet end of the hydrogen storage device I 8 is connected to the inlet end of the booster II 6 to supply hydrogen to the hydrogen storage device II 9. The outlet end of the hydrogen storage device III 10 is connected to the hydrogenation device I 11. Open or close different pipelines according to the hydrogen consumption of the hydrogenation device.

[0056] To facilitate the establishment of a one-stop steam hydrogen production and hydrogenation system, the hydrogen production and hydrogenation system adopts a skid-mounted structure. Ten skid bases are set according to the actual site conditions. The steam supply device 1, the hydrogen production assembly 2, the purification device 3, and the buffer tank 4 are each arranged on one skid base; the booster I 5 and the hydrogen storage device I 8 on the hydrogen transmission pipeline I 24 are each arranged on one skid base; the booster II 6 and the hydrogen storage device II 9 on the hydrogen transmission pipeline II 25 are each arranged on one skid base; the compressor III 7 and the hydrogen storage device III 1 are each arranged on one skid base; pipelines are used to connect between the devices, which is convenient for the layout, installation, transportation, and maintenance of the hydrogen production and hydrogenation system.

[0057] The one-stop steam hydrogen production and hydrogenation system of the present utility model has the following characteristics:

[0058] 1. It realizes the design of an integrated station for efficient steam hydrogen production and hydrogenation, without transportation, and with low cost;

[0059] 2. The process flow is simple, the equipment investment is small, and the operation cost is low;

[0060] 3. The hydrogen production equipment can be used immediately after production, meeting the hydrogen demand of the hydrogen filling station;

[0061] 4. The hydrogen production equipment adopts a skid-mounted structure and can be flexibly arranged in the station;

[0062] 5. It realizes green hydrogen production and hydrogenation, which is safe and reliable.

[0063] It should be noted that the above embodiments are examples rather than limitations of the present utility model. Those skilled in the art will be able to design many alternative embodiments without departing from the scope of the claims of this patent.

Claims

1. A one-stop steam hydrogen production and hydrogenation system, including a steam supply device, characterized in that: The steam supply device, hydrogen production assembly, purification device, and buffer tank are connected in sequence through pipelines; There are more than 2 hydrogen delivery pipelines at the outlet end of the buffer tank, and one or more devices among a compressor, a hydrogen storage device, and a hydrogenation device / export pipeline are provided on the hydrogen delivery pipelines, and multiple hydrogen delivery pipelines respectively provide hydrogen at different pressures.

2. The one-stop steam hydrogen production and hydrogenation system according to claim 1, characterized in that: The hydrogen production assembly includes a metal cracking reaction vessel, a condensation device, and a gas-liquid separator connected in sequence.

3. The one-stop steam hydrogen production and hydrogenation system according to claim 1, characterized in that: The pressure at the outlet end of the buffer tank is 2 - 5 MPa.

4. The one-stop steam hydrogen production and hydrogenation system according to claim 1, characterized in that: The outlet end of the buffer tank is connected to the hydrogen delivery pipeline III, and the other end of the hydrogen delivery pipeline III is communicated with the hydrogen export pipeline.

5. The one-stop steam hydrogen production and hydrogenation system according to claim 1, characterized in that: The outlet end of the buffer tank is connected to the hydrogen delivery pipeline I provided with a booster I and a hydrogen storage device I in sequence. The pressures of the booster I and the hydrogen storage device I are both 21 MPa, and the outlet end of the hydrogen storage device I is connected to the hydrogenation device I.

6. The one-stop steam hydrogen production and hydrogenation system according to claim 5, characterized in that: The outlet end of the buffer tank is connected to the hydrogen delivery pipeline II provided with a booster II and a hydrogen storage device II in sequence. The pressures of the booster II and the hydrogen storage device II are both 45 MPa, and the outlet end of the hydrogen storage device II is connected to the hydrogenation device I.

7. The one-stop steam hydrogen production and hydrogenation system according to claim 6, characterized in that: A compressor III and a hydrogen storage device III are sequentially arranged on the pipeline connecting the outlet end of the hydrogen storage device II and the hydrogenation device II. The pressures of the compressor III and the hydrogen storage device III are both 90 MPa.

8. The one-stop steam hydrogen production and hydrogenation system according to claim 5, characterized in that: The outlet end of the hydrogen storage device I is connected to the inlet end of the booster II.

9. The one-stop steam hydrogen production and hydrogenation system according to claim 1, characterized in that: A hydrogen purity detector is provided on the outlet pipeline of the buffer tank.

10. The one-stop steam hydrogen production and hydrogenation system according to claim 1, characterized in that: There are more than 2 skids in the hydrogen production and hydrogenation system, and the steam supply device, hydrogen production assembly, purification device, buffer tank, compressor, hydrogen storage device, and hydrogenation device are arranged on the skids.

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