Ionic liquid circulation and unpowered jet liquid supplementing device of ionic liquid hydrogen compressor

Abstract

The invention relates to an ionic liquid circulating and unpowered jet liquid supplementing device of an ionic liquid hydrogen compressor. The ionic liquid circulating and unpowered jet liquid supplementing device comprises a hydrogen pressure cylinder, a gas-liquid separator and an ionic liquid circulating system, the hydrogen pressure cylinder comprises a nozzle and a gas compression cavity; the ionic liquid circulating system comprises a pressure reducing valve, an ionic liquid box and a proportional valve; high-pressure gas-liquid mixed fluid discharged from a compression outlet of the hydrogen pressure cylinder enters the gas-liquid separator, separated pure hydrogen is stored in the hydrogen storage bottle, and pure ionic liquid obtained through separation enters the nozzle through the proportional valve after being decompressed to safe pressure through the pressure reducing valve and is sprayed back into a gas compression cavity of the hydrogen pressure cylinder after being atomized by the nozzle. And the ionic liquid leaked from the pressure reducing valve is poured back into the ionic liquid box. According to the invention, high pressure in the gas-liquid separator is reduced to a certain extent and then is directly sprayed into the gas cavities of the hydrogen compressors at all levels in a spray form through the nozzles, so that the effects of cooling, dissipating heat and improving the energy efficiency are achieved.

Description

Technical Field

[0001] The invention relates to an ionic liquid circulation and unpowered jetting liquid replenishing device for an ionic liquid hydrogen compressor. Background Art

[0002] The new energy vehicle industry is developing rapidly, and hydrogen-powered vehicles have received extensive attention due to their high calorific value and pollution-free characteristics. As the most important supporting equipment for hydrogen-powered vehicles, the design and manufacture of hydrogen compressors have received extensive attention. Among them, the key technology of the most promising ion liquid hydrogen compressor, the ion liquid circulation replenishment system, has the following problems:

[0003] 1. The current ionic liquid recycling scheme is not mature yet, with low controllability and low energy efficiency. The existing ionic liquid circulation scheme generally does not take into account the high pressure of the gas-liquid separator itself. The pressure inside the gas-liquid separator in actual application may be as high as 90MPa. Such a scheme has certain safety hazards and may also affect the dynamic characteristics of the compressor. Some schemes adopt a scheme that separates the gas-liquid separator and the liquid replenishment system, that is, the pure ionic liquid is separated by the gas-liquid separator, and the pressure is reduced to normal pressure before the ionic liquid is replenished into the compression chamber by a pump. This method has the disadvantage of high energy consumption.

[0004] 2. The current scheme for enhancing heat transfer in hydrogen compressors is not yet mature. The current schemes for enhancing heat transfer in compressors with liquid entering the gas compression chamber mainly include water mist cooling and porous media. Among them, the use of porous media will affect the air intake of the hydrogen compression chamber, and may even reduce the air intake of each stage, and it is easy to produce complex secondary flow phenomena; and the use of water mist cooling method itself requires the liquid to be pressurized to a higher pressure, which itself will cause a large energy loss. At the same time, too much liquid remains in the gas compression chamber, which may reduce the volumetric efficiency of the gas chamber. Summary of the invention

[0005] In order to solve the problems existing in the above-mentioned background technology, the present invention proposes an ion liquid hydrogen compressor ion liquid circulation and unpowered injection liquid replenishing device, which utilizes the high pressure existing in the gas-liquid separator, and after a certain degree of pressure reduction, it is directly sprayed into the air cavity of each stage of the hydrogen compressor through a nozzle in the form of a spray, thereby playing the role of cooling and heat dissipation and improving energy efficiency.

[0006] The technical solution of the present invention to solve the above problems is:

[0007] An ion liquid hydrogen compressor ion liquid circulation and unpowered injection liquid replenishing device, which is special in that:

[0008] It includes a hydrogen booster cylinder, a gas-liquid separator and an ion liquid circulation system;

[0009] The hydrogen booster cylinder comprises a hydrogen booster cylinder body and a nozzle capable of spraying ionic liquid in an atomized form, and the hydrogen booster cylinder body comprises a gas compression chamber;

[0010] The gas-liquid separator is used to separate the high-pressure hydrogen / ionic liquid mixed fluid obtained after compression, and the obtained pure hydrogen is stored in a hydrogen storage bottle;

[0011] The ionic liquid circulation system comprises a pressure reducing valve, an ionic liquid tank and a proportional valve;

[0012] The high-pressure gas-liquid mixed fluid discharged from the compression outlet of the hydrogen booster cylinder enters the gas-liquid separator, and the separated pure hydrogen is stored in the hydrogen storage bottle. The gas-liquid separator always maintains a high-pressure state. The separated pure ion liquid is reduced to a safe pressure by a pressure reducing valve, enters the nozzle through a proportional valve, and is atomized by the nozzle and sprayed back into the gas compression chamber of the hydrogen booster cylinder. The ion liquid leaked in the pressure reducing valve is poured back into the ion liquid tank.

[0013] Furthermore, the above-mentioned ion liquid hydrogen compressor ion liquid circulation and unpowered jet replenishment device also includes a controller; the hydrogen booster cylinder includes a pressure sensor, which is used to monitor the pressure in the gas compression chamber; the controller obtains the monitoring data of the pressure sensor and controls the opening and closing of the proportional valve according to the monitoring data of the pressure sensor.

[0014] When the monitoring data of the pressure sensor is higher than the threshold, the controller controls the proportional valve to open and spray atomized ionic liquid into the compressor to reduce the temperature in the air cavity, thereby improving the energy efficiency of the compressor; when the monitoring data of the pressure sensor is lower than the threshold, the controller controls the proportional valve to close.

[0015] Furthermore, the gas-liquid separator is provided with a hydrogen outlet and an ion liquid outlet, the pure ion liquid separated by the gas-liquid separator is discharged through the ion liquid outlet, and the pure hydrogen separated by the gas-liquid separator is discharged through the hydrogen outlet.

[0016] Furthermore, the ionic liquid circulation system comprises a stop valve, which is respectively connected to the ionic liquid outlet of the gas-liquid separator and the pressure reducing valve.

[0017] Furthermore, the inlet of the stop valve is connected to the ion liquid outlet of the gas-liquid separator through a pipeline, and the outlet of the stop valve is connected to the inlet of the pressure reducing valve through a pipeline.

[0018] Furthermore, the outlet of the pressure reducing valve is connected to the inlet of the proportional valve via a pipeline, and the outlet of the proportional valve is connected to the inlet of the nozzle via a pipeline.

[0019] Furthermore, the gas-liquid separator is provided with a high-pressure gas-liquid mixed fluid inlet, and the compression outlet of the hydrogen booster cylinder is connected to the high-pressure gas-liquid mixed fluid inlet of the gas-liquid separator through a pipeline.

[0020] Furthermore, the hydrogen outlet on the gas-liquid separator is connected to the hydrogen storage bottle through a pipeline.

[0021] Furthermore, the above device includes multiple hydrogen booster cylinders, which are arranged in series, and the high-pressure gas-liquid mixed fluid flows out from the last-stage hydrogen booster cylinder. For each hydrogen booster cylinder, an ion liquid circulation system is provided.

[0022] Furthermore, according to the different compression levels of each stage, the pressure reducing valves corresponding to each stage have different pressure reducing levels. Specifically, each stage reduces the pressure to a pressure sufficient to atomize the ionic liquid under the exhaust pressure condition of the corresponding level.

[0023] Advantages of the present invention:

[0024] The present invention proposes a device for realizing self-circulation of ionic liquid in an ionic liquid type hydrogen compressor, which utilizes the inherent high pressure of a gas-liquid separator to realize the circulation of the ionic liquid. The device is also designed with a recirculation system with a proportional valve and a pressure reducing valve, which has the characteristics of safety, stability and high efficiency. The inherent high pressure of the gas-liquid separator is utilized to atomize the ionic liquid and then circulate it into the compression chamber, which has the characteristics of high energy efficiency. The energy efficiency of the compressor can be improved by using the ionic liquid atomization for cooling. The proportional valve is used to control the liquid replenishment process, which can further improve the heat dissipation efficiency of the liquid replenishment spray, thereby further improving the energy efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the ionic liquid circulation and unpowered jet liquid replenishing device of the ionic liquid hydrogen compressor proposed by the present invention;

[0026] Figure 2 This is a structural diagram of another ionic liquid hydrogen compressor ionic liquid circulation and unpowered jet liquid replenishing device proposed by the present invention.

[0027] Among them, 1-gas-liquid separator, 2-stop valve, 3-ion liquid tank, 4-pressure reducing valve, 5-cylinder, 6-proportional valve, 7-nozzle, 8-hydrogen booster cylinder body, 9-pressure sensor. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0029] See also Figure 1 The present invention proposes an ionic liquid hydrogen compressor ionic liquid circulation and unpowered injection liquid replenishing device, including a hydrogen booster cylinder, a gas-liquid separator 2 and an ionic liquid circulation system.

[0030] The hydrogen booster cylinder includes a hydrogen booster cylinder body 8 and a nozzle 7 that can spray ionic liquid in an atomized form, and the hydrogen booster cylinder body 8 includes a gas compression chamber. The gas-liquid separator 2 is used to separate the high-pressure hydrogen / ionic liquid mixed fluid obtained after compression, and the obtained pure hydrogen is stored in the hydrogen storage bottle 1; the ionic liquid circulation system includes a pressure reducing valve 5, an ionic liquid tank 4 and a proportional valve 6.

[0031] The high-pressure gas-liquid mixed fluid discharged from the compression outlet of the hydrogen booster cylinder enters the gas-liquid separator 2, and the separated pure hydrogen is stored in the hydrogen storage bottle 1. The gas-liquid separator 2 always maintains a high-pressure state. The separated pure ion liquid is reduced to a safe pressure through the pressure reducing valve 5, and then enters the nozzle 7 through the proportional valve 6. After being atomized by the nozzle 7, it is sprayed back into the gas compression chamber of the hydrogen booster cylinder. The ion liquid leaked in the pressure reducing valve 5 is poured back into the ion liquid tank 4.

[0032] As a preferred embodiment of the present invention, the opening and closing of the proportional valve 6 is determined by the pressure sensor 9. In the compression stage (i.e., the stage in which the pressure in the gas compression chamber increases), the proportional valve 6 is opened to spray atomized ionic liquid into the hydrogen booster cylinder to reduce the temperature in the gas chamber, thereby improving the energy efficiency of the compressor; and in the intake and exhaust stages (i.e., the pressure in the gas compression chamber does not increase significantly), the proportional valve 6 is closed.

[0033] Specifically, the ionic liquid hydrogen compressor ionic liquid circulation and unpowered injection liquid replenishing device also includes a controller. A pressure sensor 9 is arranged in the hydrogen booster cylinder body 8, and the pressure sensor 9 is used to monitor the pressure in the gas compression chamber. The monitoring data of the pressure sensor 9 is transmitted to the controller, and the controller controls the opening and closing of the proportional valve 6 according to the monitoring data of the pressure sensor 9.

[0034] Specifically: when the monitoring data of the pressure sensor 9 is higher than the set threshold, the controller controls the proportional valve 6 to open, sprays atomized ionic liquid into the compressor, reduces the temperature in the air cavity, and thus improves the energy efficiency of the compressor; when the monitoring data of the pressure sensor 9 is lower than the set threshold, the controller controls the proportional valve 6 to close.

[0035] As a preferred embodiment of the present invention, the gas-liquid separator 2 is provided with a hydrogen outlet and an ion liquid outlet. The pure ion liquid separated by the gas-liquid separator 2 is discharged through the ion liquid outlet, and the pure hydrogen separated by the gas-liquid separator 2 is discharged through the hydrogen outlet.

[0036] In some embodiments provided by the present invention, see Figure 1 The above-mentioned ionic liquid circulation system includes a stop valve 3, which is connected to the ionic liquid outlet of the gas-liquid separator 2 and the pressure reducing valve 5 respectively.

[0037] In some embodiments provided by the present invention, see Figure 1 The inlet of the stop valve 3 is connected to the ion liquid outlet of the gas-liquid separator 2 through a pipeline, and the outlet of the stop valve 3 is connected to the inlet of the pressure reducing valve 5 through a pipeline.

[0038] In some embodiments provided by the present invention, see Figure 1 The outlet of the pressure reducing valve 5 is connected to the inlet of the proportional valve 6 through a pipeline, and the outlet of the proportional valve 6 is connected to the inlet of the nozzle 7 through a pipeline.

[0039] In some embodiments provided by the present invention, see Figure 1 The gas-liquid separator 2 is provided with a high-pressure gas-liquid mixed fluid inlet, and the compression outlet of the hydrogen booster cylinder is connected to the high-pressure gas-liquid mixed fluid inlet of the gas-liquid separator 2 through a pipeline.

[0040] In some embodiments provided by the present invention, see Figure 1 The hydrogen outlet on the gas-liquid separator 2 is connected to the hydrogen storage bottle 1 through a pipeline.

[0041] As a preferred embodiment of the present invention, see Figure 2 The above device includes a plurality of hydrogen booster cylinders, which are arranged in series. The high-pressure gas-liquid mixed fluid flows out from the last hydrogen booster cylinder. For each hydrogen booster cylinder, an ion liquid circulation system is provided. Figure 2As shown in the figure, a specific implementation method of a five-plunger ion liquid hydrogen compressor is shown. In the figure, the compressor is driven by a radial piston pump. The black line in the figure represents the transmission hydraulic oil circuit, and the piston in the hydrogen booster cylinder is driven by the reciprocating motion of the radial piston pump; the blue line in the figure represents the hydrogen pipeline, and the hydrogen flows out from the gas source, flows into the gas-liquid separator after five stages of boosting, and after separation by the gas-liquid separator, the pure hydrogen flows out from the upper side of the gas-liquid separator and enters the gas storage tank for storage; the separated ion liquid flows out from the lower side, as shown by the green line in the figure. The gas-liquid separator is the only source of ion liquid, which is replenished in parallel to each booster cylinder.

[0042] In some embodiments provided by the present invention, see Figure 2 According to the different compression levels of each stage, the pressure reducing valve 5 corresponding to each stage has different pressure reducing levels. Specifically, the pressure reducing valve 5 of each stage reduces the pressure to a pressure sufficient to atomize the ionic liquid under the exhaust pressure condition of the corresponding level.

[0043] In summary, the present invention provides an ion liquid circulation and unpowered injection liquid replenishing device for an ion liquid hydrogen compressor. The device utilizes the high pressure existing in the gas-liquid separator, and after a certain degree of pressure reduction, it is directly sprayed into the air cavity of each stage of the hydrogen compressor through a nozzle in the form of a spray, thereby playing a role in cooling and dissipating heat and improving energy efficiency.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can still adjust the technical solutions described in the above embodiments or replace some of the technical features by equivalents. Therefore, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An ion liquid hydrogen compressor ion liquid circulation and unpowered injection liquid replenishing device, which is special in that: It comprises a hydrogen booster cylinder, a gas-liquid separator (2) and an ion liquid circulation system; The hydrogen booster cylinder comprises a hydrogen booster cylinder body (8) and a nozzle (7) capable of spraying ionic liquid in an atomized form, and the hydrogen booster cylinder body (8) comprises a gas compression chamber; The gas-liquid separator (2) is used to separate the high-pressure hydrogen / ionic liquid mixed fluid obtained after compression, and the obtained pure hydrogen is stored in the hydrogen storage bottle (1); The ionic liquid circulation system comprises a pressure reducing valve (5), an ionic liquid tank (4) and a proportional valve (6); The high-pressure gas-liquid mixed fluid discharged from the compression outlet of the hydrogen booster cylinder enters the gas-liquid separator (2), and the separated pure hydrogen is stored in the hydrogen storage bottle (1). The gas-liquid separator (2) always maintains a high-pressure state. The separated pure ion liquid is reduced to a safe pressure through a pressure reducing valve (5), and then enters the nozzle (7) through a proportional valve (6). After being atomized by the nozzle (7), it is sprayed back into the gas compression chamber of the hydrogen booster cylinder. The ion liquid leaked from the pressure reducing valve (5) is poured back into the ion liquid tank (4).

2. The ionic liquid circulation and unpowered jet liquid replenishing device for the ionic liquid hydrogen compressor according to claim 1 is characterized in that: The ionic liquid hydrogen compressor ionic liquid circulation and unpowered jet liquid replenishing device also includes a controller; the hydrogen booster cylinder includes a pressure sensor (9), and the pressure sensor (9) is used to monitor the pressure in the gas compression chamber; the controller obtains monitoring data of the pressure sensor (9), and controls the opening and closing of the proportional valve (6) according to the monitoring data of the pressure sensor (9).

3. The ionic liquid circulation and unpowered jet liquid replenishing device for the ionic liquid hydrogen compressor according to claim 2 is characterized in that: The gas-liquid separator (2) is provided with a hydrogen outlet and an ion liquid outlet. The pure ion liquid separated by the gas-liquid separator (2) is discharged through the ion liquid outlet, and the pure hydrogen separated by the gas-liquid separator (2) is discharged through the hydrogen outlet.

4. The ionic liquid circulation and unpowered jet liquid replenishing device for the ionic liquid hydrogen compressor according to claim 3 is characterized in that: The ionic liquid circulation system comprises a stop valve (3), which is respectively connected to the ionic liquid outlet of the gas-liquid separator (2) and the pressure reducing valve (5).

5. The ionic liquid circulation and unpowered jet liquid replenishing device for the ionic liquid hydrogen compressor according to claim 4 is characterized in that: The inlet of the stop valve (3) is connected to the ion liquid outlet of the gas-liquid separator (2) through a pipeline, and the outlet of the stop valve (3) is connected to the inlet of the pressure reducing valve (5) through a pipeline.

6. The ionic liquid circulation and non-powered jet liquid replenishing device for the ionic liquid hydrogen compressor according to claim 5 is characterized in that: The outlet of the pressure reducing valve (5) is connected to the inlet of the proportional valve (6) through a pipeline, and the outlet of the proportional valve (6) is connected to the inlet of the nozzle (7) through a pipeline.

7. The ionic liquid circulation and unpowered jet liquid replenishing device for the ionic liquid hydrogen compressor according to claim 6 is characterized in that: The gas-liquid separator (2) is provided with a high-pressure gas-liquid mixed fluid inlet, and the compression outlet of the hydrogen booster cylinder is connected to the high-pressure gas-liquid mixed fluid inlet of the gas-liquid separator (2) through a pipeline.

8. The ionic liquid circulation and non-powered jet liquid replenishing device for the ionic liquid hydrogen compressor according to claim 7 is characterized in that: The hydrogen outlet on the gas-liquid separator (2) is connected to the hydrogen storage bottle (1) via a pipeline.

9. The ionic liquid circulation and non-powered jet liquid replenishing device for the ionic liquid hydrogen compressor according to claim 8 is characterized in that: The device includes multiple hydrogen booster cylinders, which are arranged in series to achieve different levels of compression. High-pressure gas-liquid mixed fluid flows out from the last-stage hydrogen booster cylinder. For each hydrogen booster cylinder, an ion liquid circulation system is provided.

10. The ionic liquid circulation and non-powered jet liquid replenishing device for the ionic liquid hydrogen compressor according to claim 9 is characterized in that: According to the different compression levels of each level, the pressure reducing valves (5) corresponding to each level have different pressure reducing levels. The pressure reducing valves (5) of each level need to reduce the pressure to a pressure sufficient to atomize the ionic liquid under the exhaust pressure condition of the corresponding level.

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