Hydraulic drive type hydrogenation system for skid-mounted hydrogen refueling station

Abstract

The utility model provides a liquid drive type hydrogenation system for a skid-mounted hydrogen refueling station, which comprises a hydrogen discharging area, a hydrogen pressurizing area and a hydrogen filling area which are connected through pipelines, hydrogen heat exchange units are arranged in front of and behind the hydrogen pressurizing area, the hydrogen pressurizing area comprises a primary liquid drive pressurizing mechanism and a secondary liquid drive pressurizing mechanism, and the primary liquid drive pressurizing mechanism and the secondary liquid drive pressurizing mechanism are connected through pipelines. And the hydrogen filling area is connected with a nitrogen replacement purging unit. The liquid-driven hydrogenation system is provided with a plurality of modularly designed areas to guarantee ordered operation of the system, hydrogen is continuously injected through the first-stage liquid-driven pressurization mechanism, the second-stage liquid-driven pressurization mechanism and a plurality of hydrogen heat exchange units, and safe operation of the whole system can be guaranteed while the requirements of multiple vehicles and large gas source injection requirements are met; efficient hydrogen filling is achieved; the hydraulic drive type hydrogenation system does not need to replace accessories frequently, maintenance is easy, compared with a diaphragm hydrogenation system, the problems of the leakage rate and the failure rate are well controlled and solved, and noise is low when equipment runs.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogenation in hydrogenation stations, in particular to a liquid-driven hydrogenation system for skid-mounted hydrogenation stations. Background Art

[0002] As a zero-carbon green new energy, hydrogen energy is in line with my country's clean, low-carbon, safe and efficient energy policy. At present, the number and displacement of hydrogen refueling vehicles are growing, and the development of large displacement is the trend of the compressor industry.

[0003] Traditional hydrogen refueling systems are mostly based on diaphragm systems. However, the diaphragm system has a small operating displacement and cannot meet the hydrogen refueling needs of large-displacement vehicles, causing the equipment to start and stop frequently during operation, resulting in high energy consumption of the entire equipment. The diaphragm and accessories in the compressor of the diaphragm machine need to be replaced regularly. Since the compression membrane head assembly is large and heavy overall, the disassembly is cumbersome, time-consuming, labor-intensive and costly during maintenance and replacement. When the diaphragm is replaced regularly, it is easy to cause insufficient sealing of the seals, resulting in a high leakage rate of the diaphragm machine. At the same time, the noise during the operation of the machine is relatively loud, causing noise pollution.

[0004] Therefore, how to effectively solve the problem that the hydrogen refueling system cannot meet the hydrogen refueling needs of large-displacement vehicles, causing the equipment to start and stop frequently during operation, resulting in high energy consumption of the entire equipment, and the diaphragm and accessories in the compressor of the diaphragm machine need to be replaced regularly, which is prone to a high leakage rate. At the same time, the equipment is noisy and prone to noise pollution, which is a technical problem that needs to be solved urgently. Utility Model Content

[0005] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a liquid-driven hydrogenation system for a skid-mounted hydrogenation station, which solves the problem that the hydrogenation system cannot meet the hydrogen filling needs of large-displacement vehicles, causing the equipment to start and stop frequently during operation, resulting in high energy consumption of the entire equipment, and the diaphragms and accessories in the compressor of the diaphragm machine need to be replaced regularly, which is prone to a high leakage rate. At the same time, the equipment noise is large, which is prone to noise pollution.

[0006] The technical solution of this application is:

[0007] A liquid-driven hydrogenation system for a skid-mounted hydrogen refueling station, comprising a hydrogen gas unloading area, a hydrogen gas pressurization area, and a hydrogen gas filling area connected by pipelines. Hydrogen heat exchange units are provided in front of and behind the hydrogen gas pressurization area. The hydrogen gas pressurization area includes a primary liquid-driven pressurization mechanism and a secondary liquid-driven pressurization mechanism. The hydrogen gas filling area is connected with a nitrogen replacement and purge unit. The liquid-driven hydrogenation system is provided with several modular-designed areas to ensure the orderly operation of the system. Through the primary liquid-driven pressurization mechanism, the secondary liquid-driven pressurization mechanism, and multiple hydrogen heat exchange units, hydrogen gas can be continuously filled. While meeting the requirements of a large number of vehicles and a large demand for gas source filling, the safe operation of the entire system can be ensured, and efficient hydrogen filling can be achieved. The liquid-driven hydrogenation system does not require frequent replacement of accessories and has simple maintenance. Compared with the diaphragm hydrogenation system, the leakage rate and failure rate problems are better controlled and solved, and the equipment runs with less noise.

[0008] Further, the hydrogen gas unloading area includes a hydrogen self-unloading column opened and closed by a manual ball valve. The hydrogen self-unloading column is connected to the pipeline, and a pressure gauge, a pressure transmitter, a filter, and a pneumatic control valve 1 are connected to the pipeline.

[0009] Further, the hydrogen heat exchange unit includes a heat exchanger 1, a heat exchanger 2, and a heat exchanger 3. The heat exchanger 1 is arranged on the pipeline before hydrogen gas enters the hydrogen gas pressurization area. The heat exchanger 2 is arranged on the pipeline after hydrogen gas enters the primary liquid-driven pressurization mechanism. The heat exchanger 3 is arranged on the pipeline after hydrogen gas enters the secondary liquid-driven pressurization mechanism.

[0010] Further, temperature monitors are connected to the heat exchanger 1, the heat exchanger 2, and the heat exchanger 3.

[0011] Further, both the primary liquid-driven pressurization mechanism and the secondary liquid-driven pressurization mechanism include at least two groups of hydropneumatic pressurization units arranged in parallel. The hydropneumatic pressurization unit includes a cylinder, a hydraulic cylinder, a piston connecting rod, a proportional valve component, and a stroke controller connected to each other.

[0012] Further, a pneumatic control valve 2, a check valve, and a manual ball valve 2 are sequentially arranged on the pipeline between the hydrogen gas pressurization area and the hydrogen gas filling area. A bleed-off branch pipe is connected to the pipeline between the pneumatic control valve 2 and the heat exchanger 3.

[0013] Further, the hydrogen gas filling area includes several hydrogen refueling machines connected to the pipeline. A heat exchanger 4, a pneumatic control valve 3, and a manual ball valve 3 are arranged between the hydrogen refueling machine and the manual ball valve 2.

[0014] Further, both the hydrogen self-unloading column and the hydrogen refueling machine are connected to the bleed-off main pipe.

[0015] Further, a hydrogen purging unit is connected between the heat exchanger four and the pneumatic control valve three. The hydrogen purging unit includes an instrument air pipeline connected to an instrument and a monomer equipment pipeline connected to a monomer device. Nitrogen replacement and purging units are respectively connected to the instrument air pipeline and the monomer equipment pipeline. The nitrogen replacement and purging unit includes nitrogen cylinders, and the nitrogen cylinders are connected to both the instrument air pipeline and the equipment pipeline.

[0016] Further, safety relief ports are provided on the cylinder, the instrument air pipeline, and the monomer equipment pipeline. The safety relief ports are communicated with relief branch pipes, and the relief branch pipes are all communicated with the relief main pipe.

[0017] The specific beneficial effects of the present utility model include:

[0018] 1. The liquid-driven hydrogenation system is provided with several modular-designed areas to ensure the orderly operation of the system. Through the primary liquid-driven pressurization mechanism, the secondary liquid-driven pressurization mechanism, and multiple hydrogen heat exchange units, hydrogen is continuously filled. While meeting the requirements of a large number of vehicles and a large demand for gas source filling, the safe operation of the entire system can be ensured, and efficient hydrogen filling can be achieved.

[0019] 2. The liquid-driven hydrogenation system does not require frequent replacement of accessories and is simple to repair. Compared with the diaphragm hydrogenation system, problems such as leakage rate and failure rate are better controlled and solved, and the noise during equipment operation is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic diagram of the present utility model.

[0022] Explanation of the reference numerals in the drawings:

[0023] 1. Manual ball valve one;

[0024] 2-1. Filter;

[0025] 3. Pneumatic control valve one;

[0026] 4-1. Heat exchanger one; 4-2. Heat exchanger two; 4-3. Heat exchanger three; 4-4. Heat exchanger four;

[0027] 5-1. Pressure gauge; 5-2. Pressure transmitter; 5-8. Temperature monitor;

[0028] 5-6. Temperature Monitor II; 5-7. Pressure Transmitter II;

[0029] 5-9. Safety Relief Valve I; 5-10. Safety Relief Valve II;

[0030] 8. Check Valve I;

[0031] 9-1. Manual Needle Valve I; 9-2. Manual Needle Valve II;

[0032] 10. Hydrogen Self-discharging Air Column; 10-1. Pressure Gauge II; 10-2. Pressure Transmitter III;

[0033] 12. Three-way Valve; 13. Manual Pressure Regulating Valve; 15. Check Valve II;

[0034] 14-1. Manual Ball Valve IV; 14-2. Branch Pipe I; 14-3. Branch Pipe II;

[0035] 18. Flow Control Valve; 19. Mass Flow Meter;

[0036] 20. Hydrogen Refueling Machine;

[0037] 102. Manual Ball Valve II; 103. Manual Ball Valve III;

[0038] 302. Pneumatic Control Valve II; 303. Pneumatic Control Valve III;

[0039] 30. Nitrogen Cylinder. Detailed Implementation Manner

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] A liquid-driven hydrogen refueling system for a skid-mounted hydrogen refueling station, as Figure 1As shown in the figure, it includes a hydrogen gas unloading area, a hydrogen gas boosting area, and a hydrogen gas filling area connected by pipelines. Hydrogen heat exchange units are arranged in front of and behind the hydrogen gas boosting area. The hydrogen gas boosting area includes a primary liquid-driven boosting mechanism and a secondary liquid-driven boosting mechanism. The hydrogen gas filling area is connected with a hydrogen gas purging unit. The liquid-driven hydrogenation system is provided with several modular-designed areas to ensure the orderly operation of the system. Through the primary liquid-driven boosting mechanism, the secondary liquid-driven boosting mechanism, and multiple hydrogen heat exchange units, hydrogen gas can be continuously filled. While meeting the requirements of a large number of vehicles and a large demand for gas source filling, it can ensure the safe operation of the entire system and achieve efficient hydrogen gas filling. The liquid-driven hydrogenation system does not require frequent replacement of accessories and is simple to maintain. Compared with the diaphragm hydrogenation system, the leakage rate and failure rate problems are better controlled and solved, and the noise during equipment operation is relatively small.

[0042] On the basis of the above-mentioned implementation manner, as a preferred implementation manner, the hydrogen gas unloading area includes a hydrogen self-unloading column 10 opened and closed by a manual ball valve 1. The hydrogen self-unloading column 10 is connected to the pipeline, and a pressure gauge 5-1, a pressure transmitter 5-2, a filter 2-1, and a pneumatic control valve 1 are connected to the pipeline.

[0043] On the basis of the above-mentioned implementation manner, as a preferred implementation manner, the hydrogen heat exchange unit includes a first heat exchanger 4-1, a second heat exchanger 4-2, and a third heat exchanger 4-3. The first heat exchanger 4-1 is arranged on the pipeline before hydrogen gas enters the hydrogen gas boosting area. The second heat exchanger 4-2 is arranged on the pipeline after hydrogen gas enters the primary liquid-driven boosting mechanism. The third heat exchanger 4-3 is arranged on the pipeline after hydrogen gas enters the secondary liquid-driven boosting mechanism.

[0044] On the basis of the above-mentioned implementation manner, as a preferred implementation manner, temperature monitors 5-8 are connected to the first heat exchanger 4-1, the second heat exchanger 4-2, and the third heat exchanger 4-3, and the temperature status is displayed through the temperature monitors 5-8.

[0045] On the basis of the above-mentioned implementation manner, as a preferred implementation manner, both the primary liquid-driven boosting mechanism and the secondary liquid-driven boosting mechanism include at least two groups of hydropneumatic boosting units arranged in parallel. The hydropneumatic boosting unit includes a connected cylinder, a hydraulic cylinder, a piston link, a proportional valve component, and a stroke controller.

[0046] Specifically, the liquid-driven hydrogenation system takes a hydraulic pneumatic booster unit as the core, and the main body includes components such as a pneumatic cylinder, a hydraulic cylinder, a piston connecting rod, proportional valve parts, and a stroke controller. The principle of hydrogen boosting is to transfer the kinetic energy of the motor to the liquid-driven booster pump. By driving the piston connecting rod to perform reciprocating motion work, hydrogen enters the internal cylinder through the pipeline. During the pressurization process of the compressor, low-pressure hydrogen is compressed into high-pressure hydrogen, and then it is transported to the inlet of the gas-driven pump through the pipeline, thereby realizing the boosting of hydrogen to provide hydrogen refueling.

[0047] On the basis of the above-mentioned implementation manner, as a preferred implementation manner, a pneumatic control valve two 302, a check valve 8, and a manual ball valve two 102 are sequentially arranged on the pipeline between the hydrogen boosting area and the hydrogen refueling area. A bleed-off branch pipe is connected to the pipeline between the pneumatic control valve two 302 and the heat exchanger three 4-3.

[0048] On the basis of the above-mentioned implementation manner, as a preferred implementation manner, the hydrogen refueling area includes a number of hydrogen dispensers 20 connected to the pipeline. A heat exchanger four 4-4, a pneumatic control valve three 303, and a manual ball valve three 103 are arranged between the hydrogen dispenser 20 and the manual ball valve two 102.

[0049] On the basis of the above-mentioned implementation manner, as a preferred implementation manner, both the hydrogen self-dumping column 10 and the hydrogen dispenser 20 are connected to the bleed-off main pipe.

[0050] On the basis of the above-mentioned implementation manner, as a preferred implementation manner, a hydrogen purging unit is connected between the heat exchanger four 4-4 and the pneumatic control valve three 303. The hydrogen purging unit includes an instrument air pipeline connected to the instrument and a single-unit equipment pipeline connected to the single-unit equipment. Nitrogen replacement purging units are respectively connected to the instrument air pipeline and the single-unit equipment pipeline. The nitrogen replacement purging unit includes nitrogen cylinders 30, and the nitrogen cylinders 30 are connected to both the instrument air pipeline and the equipment pipeline.

[0051] Specifically, nitrogen replacement is cited in the present utility model. The nitrogen source is connected from a nitrogen cylinder 30, and nitrogen gas is transported to monomer equipment, compression equipment, and instrument air use through a three-way valve 12, a manual pressure regulating valve 13, a safety relief valve II 5 - 10, a check valve II 15, and a manual ball valve IV 14 - 1. A relief branch pipe is provided on the nitrogen pipeline to control nitrogen relief. After the check valve II 15, it branches into two paths. The nitrogen in branch pipe I 14 - 2 enters the nitrogen purge H - 1 of the monomer equipment and the nitrogen purge E - 2 of the compressor respectively. The nitrogen gas enters the nitrogen purge H - 1 of the monomer equipment from the nitrogen purge E - 2 of the compressor. The pipeline of the nitrogen purge E - 2 of the compressor is interconnected with the two ports of the nitrogen system of the nitrogen purge H - 1 of the monomer equipment at both ends. The nitrogen in branch pipe II 14 - 3 enters the instrument air G - 1 of the monomer equipment and the instrument air G - 2 of the compressor respectively. The nitrogen replacement and purge unit also functions as the driving gas for each pneumatic control valve to control the opening and closing of the pneumatic valves in each pipeline.

[0052] On the basis of the above - mentioned embodiment, as a preferred embodiment, safety relief ports are provided on the cylinder, the instrument air pipeline, and the monomer equipment pipeline. The safety relief ports are connected to the relief branch pipe, and the relief branch pipes are all connected to the relief main pipe.

[0053] Specifically, Figure 1 The two ports of the low - pressure relief pipeline C - 1 and the low - pressure relief pipeline C - 2 marked are interconnected. The two pipelines of the hydrogen to the high - pressure relief main pipe F - 1 and the hydrogen to the high - pressure relief main pipe F - 2 are related connected pipelines, and each relief pipeline is connected to the relief main pipe.

[0054] Preferably, a hydrogen buffer zone is further provided on the liquid - driven hydrogenation system, which is connected with a buffer tank.

[0055] The operation steps of the present utility model are as follows:

[0056] 1. Control the intake of hydrogen into the hydrogen self - unloading column 10 through the manual ball valve I 1. When hydrogen enters, the pressure gauge 5 - 1 shows the pressure value of the current fluid passing through the pipeline. The pressure transmitter 5 - 2 converts the pneumatic signal into a standard electrical signal through the sensing element to provide signal parameters for pneumatic control.

[0057] 2. The incoming hydrogen passes through the basket - type filter 2 - 1 and the pneumatic control valve I 3.

[0058] 3. The hydrogen enters the heat exchanger I 4 - 1 for the first heat exchange before compression, and the temperature monitor 5 - 8 connected to the heat exchanger I 4 - 1 shows the temperature state.

[0059] 4. After being compressed by the compression cylinder of the first - stage liquid - driven supercharging mechanism, the hydrogen passes through the heat exchanger II 4 - 2 for the second heat exchange, and the temperature monitor 5 - 8 connected to the heat exchanger II 4 - 2 shows the temperature state.

[0060] 5. After the hydrogen enters the compression cylinder of the second-stage liquid-driven booster mechanism and is compressed, it undergoes the third heat exchange through the heat exchanger III 4-3. The temperature status is displayed by the temperature monitor 5-8 connected to the heat exchanger III 4-3. The three heat exchanges reduce the hydrogen temperature to the preset temperature.

[0061] 6. The hydrogen further reads the heat exchanger temperature status and pressure feedback status signals through the temperature monitor II 5-6 and the pressure transmitter II 5-7 to accurately monitor the gas temperature and pressure status.

[0062] 7. When a gas safety problem occurs, the manual needle valve I 9-1 can be opened for bleeding, or the hydrogen can be bled through the safety relief valve I 5-9 after overpressure. When the gas passes safely, the pneumatic control valve II 302 and the one-way valve I 8 are opened, and the pressure gauge II 10-1 and the pressure transmitter III 10-2 monitor the gas pressure status and feedback the pressure signal.

[0063] 8. The gas enters the heat exchanger IV 4-4 for the fourth heat exchange after passing through the manual ball valve II 102, and successively passes through the manual needle valve II 9-2, the mass flowmeter 19, and the flow regulating valve 18.

[0064] 9. Then it enters the hydrogen filling machine 20.

[0065] 10. The gas is divided into two paths and enters the hydrogen filling machine 20 after passing through the pneumatic control valve III 303 and the manual ball valve III 103 respectively, and the hydrogen filling gun on the hydrogen filling machine 20 is controlled to fill hydrogen.

[0066] The details not elaborated in this utility model are all well-known conventional technical means in the art.

[0067] The above content shows and describes the basic principle, main features and beneficial effects of this utility model. The above description is only the preferred embodiment of this utility model and is not intended to limit this utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this utility model shall be included in the protection scope of this utility model.

Claims

1. A liquid-driven hydrogenation system for a skid-mounted hydrogen refueling station, characterized in that: It includes a hydrogen unloading area, a hydrogen boosting area, and a hydrogen filling area connected by pipelines. Hydrogen heat exchange units are arranged in front of and behind the hydrogen boosting area. The hydrogen boosting area includes a primary liquid-driven boosting mechanism and a secondary liquid-driven boosting mechanism. The hydrogen filling area is connected with a hydrogen purging unit.

2. The liquid-driven hydrogenation system for a skid-mounted hydrogen refueling station according to claim 1, wherein: The hydrogen unloading area includes a hydrogen self-unloading column (10) opened and closed by a manual ball valve I (1). The hydrogen self-unloading column (10) is connected to the pipeline, and a pressure gauge (5-1), a pressure transmitter (5-2), a filter (2-1), and a pneumatic control valve I (3) are connected to the pipeline.

3. The liquid-driven hydrogenation system for a skid-mounted hydrogen refueling station according to claim 2, wherein: The hydrogen heat exchange units include a heat exchanger I (4-1), a heat exchanger II (4-2), and a heat exchanger III (4-3). The heat exchanger I (4-1) is arranged on the pipeline before hydrogen enters the hydrogen boosting area. The heat exchanger II (4-2) is arranged on the pipeline after hydrogen enters the primary liquid-driven boosting mechanism. The heat exchanger III (4-3) is arranged on the pipeline after hydrogen enters the secondary liquid-driven boosting mechanism.

4. The liquid-driven hydrogenation system for a skid-mounted hydrogenation station according to claim 3, wherein: Temperature monitors (5-8) are connected to the heat exchanger I (4-1), the heat exchanger II (4-2), and the heat exchanger III (4-3).

5. The liquid-driven hydrogenation system for a skid-mounted hydrogenation station according to claim 3, characterized in that: Both the primary liquid-driven boosting mechanism and the secondary liquid-driven boosting mechanism include at least two groups of hydropneumatic boosting units arranged in parallel. Each hydropneumatic boosting unit includes a connected cylinder, a hydraulic cylinder, a piston connecting rod, a proportional valve component, and a stroke controller.

6. The liquid-driven hydrogenation system for a skid-mounted hydrogen refueling station according to claim 5, characterized in that: A pneumatic control valve II (302), a check valve I (8), and a manual ball valve II (102) are sequentially arranged on the pipeline between the hydrogen boosting area and the hydrogen filling area. A bleed-off branch pipe is connected to the pipeline between the pneumatic control valve II (302) and the heat exchanger III (4-3).

7. The liquid-driven hydrogenation system for a skid-mounted hydrogen refueling station according to claim 6, characterized in that: The hydrogen filling area includes a number of hydrogen filling machines (20) connected to the pipeline. A heat exchanger IV (4-4), a pneumatic control valve III (303), and a manual ball valve III (103) are arranged between the hydrogen filling machine (20) and the manual ball valve II (102).

8. The liquid-driven hydrogenation system for skid-mounted hydrogen refueling station according to claim 7, wherein: The hydrogen self-unloading column (10) and the hydrogen filling machine (20) are both connected to the bleed-off main pipe.

9. The liquid-driven hydrogenation system for a skid-mounted hydrogen refueling station according to claim 8, wherein: A hydrogen purging unit is connected between the heat exchanger IV (4-4) and the pneumatic control valve III (303). The hydrogen purging unit includes an instrument air pipeline connected to the instrument and a monomer equipment pipeline connected to the monomer equipment. Nitrogen replacement and purging units are respectively connected to the instrument air pipeline and the monomer equipment pipeline.

10. The liquid-driven hydrogenation system for a skid-mounted hydrogen refueling station according to claim 9, characterized in that: Safety bleed-off ports are arranged on the cylinder, the instrument air pipeline, and the monomer equipment pipeline. The safety bleed-off ports are communicated with the bleed-off branch pipe, and the bleed-off branch pipes are all communicated with the bleed-off main pipe.

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