Ionic liquid circulation and unpowered injection liquid supplement device of ionic liquid hydrogen compressor

Abstract

The application relates to an ionic liquid hydrogen gas compressor ionic liquid circulation and power-free injection liquid supplementing device, which comprises a hydrogen gas pressurizing cylinder, a gas-liquid separator and an ionic liquid circulation system; the hydrogen gas pressurizing cylinder comprises a nozzle and a gas compression cavity; the ionic liquid circulation system comprises a pressure reducing valve, an ionic liquid tank and a proportional valve; high-pressure gas-liquid mixed fluid discharged from the compression outlet of the hydrogen gas pressurizing cylinder enters the gas-liquid separator, pure hydrogen gas separated out is stored into a hydrogen storage bottle, and the separated pure ionic liquid is reduced to a safe pressure through the pressure reducing valve and then enters the nozzle through the proportional valve, is atomized by the nozzle and is sprayed back into the gas compression cavity of the hydrogen gas pressurizing cylinder, and the leaked ionic liquid in the pressure reducing valve is poured back into the ionic liquid tank. The application utilizes the high pressure existing in the gas-liquid separator, directly sprays into the gas cavity of the hydrogen compressor in the form of atomization through the nozzle after a certain degree of pressure reduction, and plays the roles of cooling, heat dissipation and energy efficiency improvement.

Description

Technical Field

[0001] This invention relates to an ionic liquid hydrogen compressor ionic liquid circulation and non-powered injection replenishment device. Background Technology

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

[0003] 1. Current ionic liquid recirculation solutions are immature, with low controllability and low energy efficiency. Existing ionic liquid recirculation solutions generally do not consider the high pressure inherent in the gas-liquid separator itself. In actual applications, the pressure inside the gas-liquid separator may reach as high as 90 MPa. Such solutions pose certain safety hazards and may also affect the dynamic characteristics of the compressor. Some solutions use a separate gas-liquid separator and replenishment system, where the pure ionic liquid is separated by the gas-liquid separator, depressurized to atmospheric pressure, and then pumped back into the compression chamber. This method has the disadvantage of high energy consumption.

[0004] 2. Current heat transfer enhancement solutions for hydrogen compressors are not yet mature. Currently, the main heat transfer enhancement solutions used in compressors with liquid entering the gas compression chamber are water mist cooling and porous media. The porous media solution affects the gas intake into the hydrogen compression chamber, potentially reducing the intake volume at each stage, and is prone to complex secondary flow phenomena. Water mist cooling, on the other hand, requires pressurizing the liquid to a high pressure, resulting in significant energy loss. Furthermore, excessive liquid residue in the gas compression chamber may reduce its volumetric efficiency. Summary of the Invention

[0005] To address the problems existing in the background technology, this invention proposes an ion liquid hydrogen compressor ion liquid circulation and non-powered injection liquid replenishment device. Utilizing the high pressure inherent in the gas-liquid separator, after a certain degree of pressure reduction, the liquid is directly sprayed into the gas chambers of each stage of the hydrogen compressor through nozzles in the form of a spray, thereby achieving the functions of cooling and heat dissipation and improving energy efficiency.

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

[0007] A device for ion liquid hydrogen compressor, ion liquid circulation, and non-powered injection replenishment is characterized by:

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

[0009] The hydrogen pressurizing cylinder comprises a hydrogen pressurizing cylinder body and a nozzle capable of atomizing and spraying the ionic liquid, and the hydrogen pressurizing cylinder body comprises a gas compression cavity;

[0010] The gas-liquid separator is used for separating the high-pressure hydrogen / ionic liquid mixed fluid obtained at the end of compression, and the obtained pure hydrogen is stored in a hydrogen storage bottle.

[0011] The ionic liquid circulation system comprises a pressure relief 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 pressurizing cylinder enters the gas-liquid separator, the separated pure hydrogen is stored in the hydrogen storage bottle, the gas-liquid separator always maintains a high-pressure state, the separated pure ionic liquid is reduced to a safe pressure by the pressure relief valve and then enters the nozzle through the proportional valve, and the ionic liquid leaked in the pressure relief valve is returned to the ionic liquid tank.

[0013] Further, the ionic liquid hydrogen compressor ionic liquid circulation and non-powered injection liquid supplementing device further comprises a controller; the hydrogen pressurizing cylinder comprises a pressure sensor for monitoring the pressure in the gas compression cavity; the controller acquires 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 a threshold value, the controller controls the proportional valve to open, injects the atomized ionic liquid into the compressor, reduces the temperature in the gas cavity, and thus improves the energy efficiency of the compressor; when the monitoring data of the pressure sensor is lower than the threshold value, the controller controls the proportional valve to close.

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

[0016] Further, the ionic liquid circulation system comprises a stop valve connected with the ionic liquid outlet of the gas-liquid separator and the pressure relief valve.

[0017] Further, the inlet of the stop valve is connected with the ionic liquid outlet of the gas-liquid separator through a pipeline, and the outlet of the stop valve is connected with the inlet of the pressure relief valve through a pipeline.

[0018] Further, the outlet of the pressure relief valve is connected with the inlet of the proportional valve through a pipeline, and the outlet of the proportional valve is connected with the inlet of the nozzle through a pipeline.

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

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

[0021] Further, the device comprises a plurality of hydrogen gas booster cylinders, and the plurality of hydrogen gas booster cylinders are arranged in series, and the high-pressure gas-liquid mixed fluid flows out of the last-stage hydrogen gas booster cylinder, and for each hydrogen gas booster cylinder, an ion liquid circulating system is arranged.

[0022] Further, according to different compression levels of each stage, the corresponding pressure relief valves of each stage have different pressure relief levels, and specifically, each stage is reduced to a pressure sufficient to atomize the ion liquid under the corresponding exhaust pressure.

[0023] Advantages of the present application:

[0024] The present application provides a device for realizing self-circulation of ion liquid in an ion liquid type hydrogen gas compressor, which realizes circulation of ion liquid by using the high pressure of the gas-liquid separator itself, and the device is also designed with a recirculation system with a proportional valve and a pressure relief valve, and has the characteristics of safety, stability and high efficiency, and the inherent high pressure of the gas-liquid separator is used to atomize the ion liquid and then circulate and supplement into the compression chamber, and has the characteristics of high energy efficiency, and the ion liquid atomization cooling can improve the energy efficiency of the compressor, and the proportional valve is used to control the liquid supplementing process, which can further improve the heat dissipation efficiency of the liquid supplementing spray, and further improve the energy efficiency of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure diagram of an ion liquid hydrogen gas compressor ion liquid circulation and non-powered injection liquid supplementing device provided by the present application;

[0026] Figure 2 is another structure diagram of an ion liquid hydrogen gas compressor ion liquid circulation and non-powered injection liquid supplementing device provided by the present application.

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

[0028] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0029] Referring to Figure 1 The present application provides an ionic liquid hydrogen compressor ionic liquid circulation and power-free injection liquid supplement device, comprising a hydrogen booster cylinder, a gas-liquid separator 2 and an ionic liquid circulation system.

[0030] The hydrogen booster cylinder comprises a hydrogen booster cylinder body 8 and a nozzle 7 capable of atomizing and spraying ionic liquid, and the hydrogen booster cylinder body 8 comprises a gas compression cavity. The gas-liquid separator 2 is used to separate the high-pressure hydrogen / ionic liquid mixed fluid obtained at the end of compression, and the obtained pure hydrogen is stored in a 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.

[0031] The high-pressure gas-liquid mixed fluid discharged from the compression outlet of the hydrogen booster cylinder enters the gas-liquid separator 2, 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 ionic liquid is reduced to a safe pressure by the pressure reducing valve 5 and then enters the nozzle 7 through the proportional valve 6, is atomized by the nozzle 7 and is sprayed back into the gas compression cavity of the hydrogen booster cylinder, and the leaked ionic liquid in the pressure reducing valve 5 is returned to the ionic liquid tank 4.

[0032] As a preferred embodiment of the present application, the opening and closing of the proportional valve 6 is determined by a pressure sensor 9, in the compression stage (i.e. the pressure rising stage in the gas compression cavity), the proportional valve 6 is opened, the atomized ionic liquid is injected into the hydrogen booster cylinder, the temperature in the gas cavity is reduced, and thus the efficiency of the compressor is improved; and in the intake and exhaust stage (i.e. the stage without obvious pressure rising in the gas compression cavity), the proportional valve 6 is closed.

[0033] Specifically, the ionic liquid hydrogen compressor ionic liquid circulation and power-free injection liquid supplement device further comprises 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 cavity. 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, and sprays the atomized ionic liquid into the compressor, so as to reduce the temperature in the air cavity, thereby improving 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 application, the gas-liquid separator 2 is provided with a hydrogen outlet and an ionic liquid outlet, the pure ionic liquid separated by the gas-liquid separator 2 is discharged through the ionic 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 application, referring to Figure 1 The ionic liquid circulation system comprises a stop valve 3, which is connected with 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 application, referring to Figure 1 The inlet of the stop valve 3 is connected with the ionic liquid outlet of the gas-liquid separator 2 through a pipeline, and the outlet of the stop valve 3 is connected with the inlet of the pressure reducing valve 5 through a pipeline.

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

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

[0041] As a preferred embodiment of the present application, referring to Figure 2 The device comprises a plurality of hydrogen booster cylinders, the plurality of hydrogen booster cylinders are arranged in series, the high-pressure gas-liquid mixed fluid flows out of the last-stage hydrogen booster cylinder, and one set of ionic liquid circulation system is arranged for each hydrogen booster cylinder. For example, Figure 2As shown in the specific embodiment of the five-plunger ionic liquid hydrogen compressor, the compressor is driven by a radial plunger pump, the black line in the figure represents the transmission hydraulic oil line, and the piston in the hydrogen booster cylinder is driven by the reciprocating motion of the radial plunger pump; the blue line in the figure represents the hydrogen pipeline, hydrogen flows out from the gas source, passes through five stages of pressure boosting, and then flows into the gas-liquid separator, after separation by the gas-liquid separator, pure hydrogen gas flows out from the upper side of the gas-liquid separator and enters the gas storage tank for storage; the separated ionic liquid flows out from the lower side, as shown by the green line in the figure, and the gas-liquid separator is the only source of ionic liquid, which is connected in parallel to supplement the ionic liquid into each booster cylinder.

[0042] In some embodiments provided by the present application, referring to Figure 2 According to the different compression levels of each stage, the corresponding pressure reducing valves 5 of each stage have different pressure reducing levels, and specifically, the pressure reducing valves 5 of each stage are reduced to a pressure sufficient to atomize the ionic liquid under the corresponding exhaust pressure.

[0043] In summary, the present application provides an ionic liquid hydrogen compressor ionic liquid circulation and unpowered injection liquid supplement device, which utilizes the high pressure existing in the gas-liquid separator, reduces the pressure to a certain extent, and then directly sprays into the gas cavity of each stage of hydrogen compressor in the form of spray through the nozzle, thereby playing the role of cooling, heat dissipation and improving energy efficiency.

[0044] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and those skilled in the art can still adjust the technical solutions described in the foregoing embodiments or make equivalent replacement for some technical features. Therefore, if these modifications and variations of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A device for ion liquid hydrogen compressor ion liquid circulation and non-powered injection replenishment, characterized in that: It includes a hydrogen booster cylinder, a gas-liquid separator (2), and an ion liquid circulation system; The hydrogen booster cylinder includes a hydrogen booster cylinder body (8) and a nozzle (7) that can atomize and spray ionic liquid. 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 mixture obtained after compression and store the obtained pure hydrogen in the hydrogen storage bottle (1). The ion liquid circulation system includes a pressure reducing valve (5), an ion liquid tank (4), and a proportional valve (6). The high-pressure gas-liquid mixture discharged from the compression outlet of the hydrogen booster cylinder enters the gas-liquid separator (2). The separated pure hydrogen is stored in the hydrogen storage bottle (1). The gas-liquid separator (2) is always kept under high pressure. The separated pure ionic 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 ionic liquid leaking from the pressure reducing valve (5) is poured back into the ionic liquid tank (4). The ionic liquid hydrogen compressor ionic liquid circulation and non-powered injection replenishment device also includes a controller; the hydrogen booster cylinder includes a pressure sensor (9), which is used to monitor the pressure in the gas compression chamber; the controller acquires the 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).

2. The ion liquid hydrogen compressor ion liquid circulation and non-powered injection replenishment device according to claim 1 is characterized in that: The gas-liquid separator (2) is provided with a hydrogen outlet and an ionic liquid outlet. The pure ionic liquid separated by the gas-liquid separator (2) is discharged through the ionic liquid outlet, and the pure hydrogen separated by the gas-liquid separator (2) is discharged through the hydrogen outlet.

3. The ion liquid hydrogen compressor ion liquid circulation and non-powered injection replenishment device according to claim 2 is characterized in that: The ionic liquid circulation system includes a shut-off valve (3), which is connected to the ionic liquid outlet of the gas-liquid separator (2) and a pressure reducing valve (5), respectively.

4. The ion liquid hydrogen compressor ion liquid circulation and non-powered injection replenishment device according to claim 3 is characterized in that: The inlet of the shut-off valve (3) is connected to the ion liquid outlet of the gas-liquid separator (2) through a pipeline, and the outlet of the shut-off valve (3) is connected to the inlet of the pressure reducing valve (5) through a pipeline.

5. The ion liquid hydrogen compressor ion liquid circulation and non-powered injection replenishment device according to claim 4 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.

6. The ion liquid hydrogen compressor ion liquid circulation and non-powered injection replenishment device according to claim 5 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.

7. The ion liquid hydrogen compressor ion liquid circulation and non-powered jet replenishment device according to claim 6 is characterized in that: The hydrogen outlet of the gas-liquid separator (2) is connected to the hydrogen storage cylinder (1) via a pipeline.

8. The ion liquid hydrogen compressor ion liquid circulation and non-powered injection replenishment device according to claim 7 is characterized in that: The device includes multiple hydrogen booster cylinders connected in series to achieve different levels of compression. The high-pressure gas-liquid mixture flows out from the last stage hydrogen booster cylinder. Each hydrogen booster cylinder is equipped with an ion liquid circulation system.

9. The ion liquid hydrogen compressor ion liquid circulation and non-powered injection replenishment device according to claim 8 is characterized in that: Depending on the compression level, the pressure reducing valve (5) corresponding to each level has a different pressure reducing level. Each level of pressure reducing valve (5) must reduce the pressure to a pressure sufficient to atomize the ionic liquid under the corresponding level of exhaust pressure.

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