Prying booster device and its light load starting method and light load stopping method

Abstract

The application discloses a pry-mounted pressurizing device, comprising: a front module and a pressurizing module; two output ends of the front module are connected with input ends of the pressurizing module and a first input end of a hydrogenation station hydrogenation machine respectively, and hydrogen externally input is transported to the pressurizing module or the hydrogenation machine according to a signal of a station control system; an output end of the pressurizing module is connected with a fixed hydrogen storage container of the hydrogenation station, and the pressurizing module is provided with a venting pipeline; and the venting pipeline releases the pressure in the pressurizing module before the pressurizing module is started. The pry-mounted pressurizing device provided by the application is provided with the venting pipeline in the pressurizing module, the pressure in the pressurizing module can be released when the compressor stops running, thereby reducing the resistance of the next start of the compressor, increasing the service life of the compressor, and meanwhile, the pressure can be released before maintenance, so that the workers are prevented from being hurt by the residual pressure in the pipeline.

Description

Technical Field

[0001] This invention relates to the field of gas transmission technology, and in particular to a skid-mounted booster device and its light-load start-up and light-load shutdown methods. Background Technology

[0002] Hydrogen is a chemical element that is widely distributed on Earth. It is one of the lightest elements, possesses high energy density, and has zero emissions, thus being considered a key energy option for the future.

[0003] Hydrogen has three main applications: energy production, transportation, and industrial production. In energy production, hydrogen and oxygen can be obtained through water electrolysis, thus generating electricity. In transportation, hydrogen is used as fuel; it reacts with oxygen in fuel cells to produce electricity, releasing water in the process. In industrial production, hydrogen is used as a feedstock, playing a crucial role in many important industrial processes.

[0004] Hydrogen is considered a constructive factor in the global energy system. As a clean, zero-emission energy form, it can address many issues related to environmental protection and climate change. In the future, it is foreseeable that hydrogen will become the primary power source for fuel cell vehicles and will see wider and more extensive applications in industrial production.

[0005] In summary, hydrogen, as an emerging energy form, has a very promising future. Although there are still challenges and problems to be solved in areas such as hydrogen transportation and storage, people are constantly exploring and researching how to utilize hydrogen to build a more stable, safe, and environmentally friendly energy system.

[0006] Skid-mounted turbochargers are industrial equipment primarily used to compress hydrogen to a high-pressure state for use in hydrogen energy applications. Common applications include fuel cell vehicles and hydrogen storage tank refilling. The design and manufacture of skid-mounted turbochargers require consideration of several technical issues. For example, how to control the operating state of the hydrogen compressor based on parameters such as gas line pressure, lubricating oil pressure, and high-pressure cylinder pressure to achieve the ideal compression effect. Furthermore, skid-mounted turbochargers also need to consider system safety, such as how to install overflow valves, safety valves, and how to control the temperature of critical components. Finally, it is also necessary to consider how to purify and filter the hydrogen to ensure that the hydrogen quality meets relevant standards and requirements.

[0007] In the existing technology, the compressor of a skid-mounted booster compressor generally uses a diaphragm compressor, which has a high internal pressure and a large compressor load during startup, and a relatively short diaphragm life. Summary of the Invention

[0008] The purpose of this invention is to provide a skid-mounted booster device and its light-load start-up and light-load shutdown methods to solve the problem of low diaphragm life due to frequent start-ups and shutdowns in the prior art.

[0009] To address the above problems, a first aspect of the present invention provides a skid-mounted booster device, comprising: a pre-mounted module and a booster module;

[0010] The two output terminals of the pre-module are respectively connected to the input terminal of the booster module and the first input terminal of the hydrogen dispenser, and deliver the externally input hydrogen to the booster module or the hydrogen dispenser according to the signal of the station control system.

[0011] The output end of the booster module is connected to a hydrogen storage container. The booster module is equipped with a venting pipeline, which releases the internal pressure of the booster module before it is started.

[0012] Optionally, the booster module further includes: a compressor, an intake branch, an exhaust branch, and a return branch;

[0013] The compressor's input end is connected to the end of the intake branch, and its output end is connected to the beginning of the exhaust branch;

[0014] The two ends of the return branch are respectively connected to the intake branch and the exhaust branch;

[0015] The vent pipe is connected to the exhaust branch or the intake branch;

[0016] The venting line and the return branch are connected before the compressor starts according to a preset rule to release the pressure in the intake branch and the exhaust branch.

[0017] Optionally, when the return branch is open, the intake branch and the exhaust branch are connected, so that the pressure in the intake branch and the exhaust branch is the same;

[0018] When the venting pipe is open, the gas in the intake branch and the exhaust branch is discharged through the venting pipe, thereby reducing the pressure in the intake branch and the exhaust branch.

[0019] Optionally, the intake branch includes a first filter and a first buffer tank;

[0020] The input ends of the first filter, the first buffer tank, and the compressor are connected in sequence via pipes;

[0021] The exhaust branch includes a second buffer tank, an air cooler, a first check valve, and an exhaust ball valve;

[0022] The compressor's output end, the second buffer tank, the gas cooler, the first check valve, and the exhaust ball valve are connected in sequence via pipelines.

[0023] Optionally, the reflux branch includes a reflux ball valve, one end of which is connected via a pipe between the first filter and the first buffer tank of the intake branch;

[0024] The other end is connected via a pipe between the air cooler and the first check valve in the exhaust branch.

[0025] Optionally, the venting pipeline includes: a venting ball valve and a second check valve;

[0026] The first end of the vent ball valve is connected via a pipe between the gas cooler and the first check valve in the exhaust branch, and the second end is connected via a pipe to the first end of the second check valve.

[0027] The second end of the second check valve is connected to an external pipeline via a pipe.

[0028] Optionally, the front module includes: an intake pipe, a first exhaust branch, a second exhaust branch, and a pressure monitoring branch;

[0029] The pressure monitoring branch is connected to the intake pipe to monitor the intake pressure;

[0030] The beginning of the first exhaust branch is connected to the end of the intake pipe, and the end of the first exhaust branch is connected to the hydrogen refueling machine.

[0031] The beginning of the second exhaust branch is connected to the end of the intake pipe, and the end of the second exhaust branch is connected to the booster module; the first exhaust branch and the second exhaust branch introduce the gas into the hydrogen dispenser or the booster module according to the signal of the station control system.

[0032] Optionally, the second exhaust branch includes a second valve, one end of which is connected to the end of the intake pipe via a pipe, and the other end of which is connected to the booster module via a pipe.

[0033] Another aspect of the present invention provides a light-load start-up method for a skid-mounted booster device, applied to the skid-mounted booster device described above, the method comprising:

[0034] Close the second valve and the exhaust ball valve to prevent gas from the external hydrogen pipeline from entering the pressurization module;

[0035] Open the venting ball valve to connect the intake branch and the exhaust branch, so that the pressure in the intake branch and the exhaust branch is the same;

[0036] Open the reflux ball valve to allow the gas in the intake branch and the exhaust branch to be discharged through the vent pipe, thereby reducing the pressure in the intake branch and the exhaust branch;

[0037] Open the drain valve to reduce the pressure of the hydraulic oil in the compressor cylinder head, thereby reducing the load on the crankshaft and connecting rod mechanism.

[0038] When the pressure in the exhaust branch is less than the preset value, the vent ball valve is closed to isolate the intake branch and the exhaust branch from the outside, and the intake branch, the exhaust branch and the return branch form a sealed space;

[0039] The oil pump is activated after the first preset time to allow the lubricating oil to flow quickly to the compressor;

[0040] The compressor is started after a second preset time, so that the gas in the intake branch, the exhaust branch and the return branch circulates in the intake branch, the exhaust branch and the return branch;

[0041] While starting the compressor, close the oil drain valve to ensure that the lubricating oil in the compressor reaches the preset pressure;

[0042] After a third preset time, the reflux ball valve is closed, and the second valve and exhaust ball valve are opened, so that external gas enters through the intake branch under the drive of the compressor and is discharged from the exhaust branch.

[0043] Another aspect of the present invention provides a method for light-load shutdown of a skid-mounted booster device, applied to the skid-mounted booster device described above, the method comprising:

[0044] Close the second valve and the exhaust ball valve to prevent gas from the external hydrogen pipeline from entering the pressurization module;

[0045] Open the reflux ball valve to connect the intake branch and the exhaust branch, so that the pressure in the intake branch and the exhaust branch is the same. Open the vent ball valve to allow the gas in the intake branch and the exhaust branch to be discharged through the vent pipe, thereby reducing the pressure in the intake branch and the exhaust branch.

[0046] When the pressure in the exhaust branch is less than the preset value, the vent ball valve is closed to isolate the intake branch and the exhaust branch from the outside, and the intake branch, the exhaust branch and the return branch form a sealed space;

[0047] After the fourth preset time, the oil drain valve is opened to reduce the pressure of the hydraulic oil in the compressor cylinder head and reduce the load on the crankshaft connecting rod mechanism.

[0048] The compressor will shut off after the fifth preset time.

[0049] The oil pump will shut off after the sixth preset time.

[0050] After a seventh preset time, the return ball valve is closed to disconnect the intake branch and the exhaust branch.

[0051] Close the drain valve.

[0052] The above-described technical solution of the present invention has the following beneficial technical effects:

[0053] The skid-mounted booster provided by this invention has a venting pipeline in the booster module, which can release the pressure inside the booster module before the compressor starts, thereby reducing the starting resistance of the compressor and increasing the compressor's lifespan. At the same time, it can also be used to release pressure before maintenance to avoid residual pressure in the pipeline from causing harm to maintenance workers. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the skid-mounted booster device provided by the present invention.

[0055] Figure 2 This is a schematic diagram of the structure of the front-end module provided according to an embodiment of the present invention.

[0056] Figure 3 This is a schematic diagram of the booster module provided according to an embodiment of the present invention. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0058] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0059] In the description of this invention, it should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0061] The invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale.

[0062] Hydrogen is considered a constructive factor in the global energy system. As a clean, zero-emission energy form, it can address many issues related to environmental protection and climate change. In the future, it is foreseeable that hydrogen will become the primary power source for fuel cell vehicles and will see wider and more extensive applications in industrial production.

[0063] In summary, hydrogen, as an emerging energy form, has a very promising future. Although there are still challenges and problems to be solved in areas such as hydrogen transportation and storage, people are constantly exploring and researching how to utilize hydrogen to build a more stable, safe, and environmentally friendly energy system.

[0064] Skid-mounted turbochargers are industrial equipment primarily used to compress hydrogen to a high-pressure state for use in hydrogen energy applications. Common applications include fuel cell vehicles and hydrogen storage tank refilling. The design and manufacture of skid-mounted turbochargers require consideration of several technical issues. For example, how to control the operating state of the hydrogen compressor based on parameters such as gas line pressure, lubricating oil pressure, and high-pressure cylinder pressure to achieve the ideal compression effect. Furthermore, skid-mounted turbochargers also need to consider system safety, such as how to install overflow valves, safety valves, and how to control the temperature of critical components. Finally, it is also necessary to consider how to purify and filter the hydrogen to ensure that the hydrogen quality meets relevant standards and requirements.

[0065] In the existing technology, the compressor of a skid-mounted booster compressor generally uses a diaphragm compressor, which has a short lifespan due to frequent start-stop cycles.

[0066] Figure 1 This is a schematic diagram of the skid-mounted booster device provided by the present invention.

[0067] Reference Figure 1 The present invention provides a skid-mounted booster device, comprising: a pre-module, a booster module, a hydrogen dispenser, and a hydrogen storage container;

[0068] The two output terminals of the pre-module are respectively connected to the input terminal of the booster module and the first input terminal of the hydrogen dispenser. According to the signal of the station control system, the externally input hydrogen is delivered to the booster module or the hydrogen dispenser. The pre-module is used to distribute hydrogen. The structure is not limited here. It can be a combination of multiple electric valves and pipelines, a combination of multiple pneumatic valves and pipelines, or an adjustable three-way valve.

[0069] The output end of the booster module is connected to a hydrogen storage container. The booster module is equipped with a venting pipeline, which releases the internal pressure of the booster module before it is started. The structure of the booster module is not limited, but its main structure is a compressor, which can be a diaphragm compressor or a reciprocating compressor, as long as it can pressurize hydrogen. The venting pipeline is connected to the pipeline of the booster module to release the pressure in the pipeline. The main structure of the venting pipeline is equipped with a valve, which can selectively release the internal pressure of the booster module.

[0070] The output end of the hydrogen storage container is connected to the second input end of the hydrogen refueling machine, which can deliver the hydrogen stored in the hydrogen storage container or the hydrogen input from the pre-module to the fuel cell vehicle.

[0071] The skid-mounted booster provided by this invention has a venting pipeline in the booster module, which can release the pressure inside the booster module before the compressor starts, thereby reducing the starting resistance of the compressor and increasing the compressor's lifespan. At the same time, it can also be used to release pressure before maintenance to avoid residual pressure in the pipeline from causing harm to maintenance workers.

[0072] The skid-mounted booster provided by this invention can supply hydrogen to tube bundle vehicles at pressures of 20MPa, 30MPa and 50MPa, and send the unloading pressure of the tube bundle vehicle to the station control system. Based on the signal from the station control system, the hydrogen is then delivered to the hydrogen storage container or hydrogen refueling machine.

[0073] Hydrogen storage containers include low-pressure cylinders, medium-pressure cylinders, and high-pressure cylinders. Low-pressure cylinders are used to store gas at 20-45 MPa; medium-pressure cylinders are used to store gas at 30-45 MPa; and high-pressure cylinders are used to store gas at 40-45 MPa.

[0074] In one embodiment, the booster module further includes: a compressor, an intake branch, an exhaust branch, and a return branch;

[0075] The compressor's input end is connected to the end of the intake branch, and its output end is connected to the beginning of the exhaust branch;

[0076] The two ends of the return branch are respectively connected to the intake branch and the exhaust branch;

[0077] The vent pipe is connected to the exhaust branch;

[0078] The venting line and the return branch are connected before the compressor starts according to a preset rule, releasing the pressure in the intake and exhaust branches. Since the return branch connects the intake and exhaust branches, all pressure in these branches is released before compressor start-up, thereby reducing compressor starting resistance and increasing compressor lifespan. Simultaneously, when the compressor starts, the return branch opens, forming a small loop with the intake and exhaust branches, further reducing compressor starting resistance. The preset rule refers to the light-load start-up method for skid-mounted booster equipment, which will be described later.

[0079] In one embodiment, when the return branch is open, the intake branch and the exhaust branch are connected, so that the pressure in the intake branch and the exhaust branch is the same;

[0080] When the venting pipe is open, the gas in the intake branch and the exhaust branch is discharged through the venting pipe, thereby reducing the pressure in the intake branch and the exhaust branch.

[0081] In one embodiment, the intake branch includes a first filter GF10 and a first buffer tank IBT;

[0082] The first filter GF10, the first buffer tank IBT, and the compressor input are connected in sequence via pipes;

[0083] The exhaust branch includes a second buffer tank EBT, an air cooler GC, a first check valve HCV06, and an exhaust ball valve PBV-507.

[0084] The compressor output, the second buffer tank EBT, the gas cooler GC, the first check valve HCV06, and the exhaust ball valve PBV-507 are connected in sequence via pipelines.

[0085] Optionally, the exhaust branch is also provided with a first temperature monitoring point TT01. The first temperature monitoring point is set between the output end of the compressor and the second buffer tank EBT. The exhaust temperature can be directly obtained based on the first temperature monitoring point and can be uploaded to the control system.

[0086] The exhaust branch is also equipped with a second temperature monitoring point TT03, which is located between the gas cooler GC and the first check valve HCV06. Based on the temperature data obtained from the second temperature monitoring point TT03 and the temperature data obtained from the first temperature monitoring point TT01, the effect of the gas cooler GC can be determined.

[0087] The exhaust branch is also equipped with a second pressure monitoring point PI02. The second pressure monitoring point PI02 is connected to the exhaust branch through a pipeline, and a second pressure monitoring point valve HNV11 is installed on the pipeline.

[0088] The exhaust branch is also equipped with a second pressure alarm point PT02. The second pressure alarm point PT02 is connected to the exhaust branch through a pipeline. The pipeline is equipped with a second pressure alarm point valve HNV12. When the pressure measured by the second pressure alarm point valve HNV12 exceeds the preset value, it will send an alarm signal to the control system.

[0089] In one embodiment, the booster module further includes a follow-up valve SDV1 and a pressure switch PS03;

[0090] The main function of the follow-up valve SDV1 is to maintain a certain pressure difference between the hydraulic oil pressure on one side of the diaphragm in the cylinder and the air pressure on the other side of the diaphragm, so as to prevent the diaphragm from generating large additional stress at the valve hole of the cylinder head due to excessive pressure difference, thereby reducing the service life of the diaphragm.

[0091] The main function of the pressure switch PS03 is to monitor whether the diaphragm inside the follow-up valve SDV1 is damaged. Its set value is 0.15MPa. When the diaphragm ruptures, the pressure of compressed gas or hydraulic oil reaches 0.15MPa, and the pressure switch will activate and send a shutdown command to the control system to prevent accidents such as explosions and fires caused by hydrogen leakage.

[0092] In one embodiment, the reflux branch includes a reflux ball valve PBV-505, one end of which is connected via a pipe between the first filter GF10 and the first buffer tank IBT of the intake branch.

[0093] The other end is connected via a pipe between the air cooler GC and the first check valve HCV06 in the exhaust branch. The continuity of the return branch is controlled by opening and closing the return ball valve PBV-505.

[0094] In one embodiment, the venting line includes: a venting ball valve PBV-506 and a second check valve HV08;

[0095] The first end of the vent ball valve PBV-506 is connected via a pipe between the gas cooler GC and the first check valve HCV06 in the exhaust branch, and the second end is connected via a pipe to the first end of the second check valve HV08.

[0096] The second end of the second check valve HV08 is connected to an external pipeline via a pipe.

[0097] Optionally, a first high-pressure valve HBV05 is also provided between the vent ball valve PBV-506 and the second check valve HV08. The first high-pressure valve HBV05 is used for maintenance.

[0098] In one embodiment, the booster module further includes a crankcase, a compressor lubrication supply branch, and a compressor lubrication return branch;

[0099] The compressor lubrication oil supply branch includes the first filter OF1, oil pump P400, second filter OF2, oil cooler OC, third check valve HV05, plunger pump T, and fourth backflow valve HV04.

[0100] The first filter OF1 is located inside the crankcase. The first filter OF1, oil pump P400, second filter OF2, oil cooler OC, third check valve HV05, plunger pump T, fourth check valve HV04, and compressor oil inlet are connected in sequence through pipelines.

[0101] The compressor lubrication return oil branch includes the fifth check valve HV06, the oil drain valve PBV-503, the high-pressure needle valve HNV08, and the relief valve OV1;

[0102] The oil drain valve PBV-503, the high-pressure needle valve HNV08, and the overflow valve OV1 are connected in parallel. One end is connected to the second end of the fifth check valve HV06 through a pipe, and the other end is connected to the crankcase through a pipe.

[0103] The first end of the fifth check valve HV06 is connected to the compressor's oil drain port.

[0104] Optionally, the compressor lubrication oil supply branch also includes an oil inlet valve BV02, which is located between the oil cooler OC and the third check valve HV05.

[0105] The booster module also includes an oil supply and pressure relief branch. One end of the oil supply and pressure relief branch is connected to the crankcase, and the other end is connected between the oil inlet valve BV02 and the third check valve HV05 of the compressor lubrication oil supply branch. The oil supply and pressure relief branch is equipped with a first overflow valve NV04 and is connected to the lubricating oil pressure measurement point PI07.

[0106] The compressor lubrication return oil branch is also connected to the oil discharge pressure monitoring point PI03 and the oil discharge pressure protection monitoring point PT03.

[0107] In one embodiment, the front-end module includes: an intake pipe, a first exhaust branch, a second exhaust branch, and a pressure monitoring branch;

[0108] The pressure monitoring branch is connected to the intake pipe to monitor the intake pressure;

[0109] The beginning of the first exhaust branch is connected to the end of the intake pipe, and the end of the first exhaust branch is connected to the hydrogen refueling machine.

[0110] The beginning of the second exhaust branch is connected to the end of the intake pipe, and the end of the second exhaust branch is connected to the booster module; the first exhaust branch and the second exhaust branch introduce the gas into the hydrogen dispenser or the booster module according to the signal of the station control system.

[0111] In one embodiment, the first exhaust branch includes a sixth check valve HCV01 and a first valve PBV-501;

[0112] One end of the sixth check valve HCV01 is connected to the end of the intake pipe via a pipe, and the other end is connected to the first end of the first valve PBV-501 via a pipe. The second end of the first valve PBV-501 is connected to the hydrogen dispenser via a pipe.

[0113] In one embodiment, the second exhaust branch includes a second valve PBV-502, one end of which is connected to the end of the intake pipe via a pipe, and the other end of which is connected to the booster module via a pipe.

[0114] The skid-mounted booster also includes a cooling system, with the compressor having a first cooling interface CWR4 and a second cooling interface CWS4;

[0115] The oil cooler OC is equipped with a third cooling interface CWR2 and a fourth cooling interface CWS2;

[0116] The air cooler GC is equipped with a fifth cooling interface CWR1 and a sixth cooling interface CWS1.

[0117] The cooling system cools the compressor, oil cooler OC, and air cooler GC through the first cooling interface CWR4, the second cooling interface CWS4, the third cooling interface CWR2, the fourth cooling interface CWS2, the fifth cooling interface CWR1, and the sixth cooling interface CWS1.

[0118] Another aspect of the present invention provides a light-load start-up method for a skid-mounted booster device, applied to the skid-mounted booster device described above, the method comprising:

[0119] Close the second valve PBV-502 and the exhaust ball valve PBV-507 to prevent gas from the external hydrogen pipeline from entering the pressurization module;

[0120] Open the venting ball valve PBV-506 to connect the intake branch and the exhaust branch, and make the pressure in the intake branch and the exhaust branch the same;

[0121] Open the reflux ball valve PBV-505 to allow the gas in the intake branch and the exhaust branch to be discharged through the vent pipe, thereby reducing the pressure in the intake branch and the exhaust branch;

[0122] Open the drain valve PBV-503 to reduce the pressure of the hydraulic oil in the compressor cylinder head, thereby reducing the load on the crankshaft and connecting rod mechanism. When the pressure of the hydraulic oil inside the cylinder head exceeds the design value, it can cause the load on the crankshaft and connecting rod mechanism to exceed the design value, leading to a compressor accident.

[0123] When the pressure in the exhaust branch is less than the preset value, the vent ball valve PBV-506 is closed to isolate the intake branch and the exhaust branch from the outside, and the intake branch, the exhaust branch and the return branch form a sealed space.

[0124] After a first preset time, the oil pump P400 is activated to allow the lubricating oil to flow quickly to the compressor; the first preset time can be 5-10 seconds.

[0125] The compressor is started after a second preset time, so that the gas in the intake branch, the exhaust branch and the return branch circulates in the intake branch, the exhaust branch and the return branch; the second preset time can be 15 seconds;

[0126] While starting the compressor, close the oil drain valve PBV-503 to ensure that the lubricating oil at the compressor meets the preset pressure;

[0127] After a third preset time, the return ball valve PBV-505 is closed, and the second valve (PBV-502) and the exhaust ball valve PBV-507 are opened, so that external gas enters through the intake branch under the drive of the compressor and is discharged from the exhaust branch; the third preset time can be 45 seconds.

[0128] Another aspect of the present invention provides a method for light-load shutdown of a skid-mounted booster device, applied to the skid-mounted booster device described above, the method comprising:

[0129] Close the second valve PBV-502 and the exhaust ball valve PBV-507 to prevent gas from the external hydrogen pipeline from entering the pressurization module;

[0130] Open the reflux ball valve PBV-505 to connect the intake branch and the exhaust branch, so that the pressure in the intake branch and the exhaust branch is the same. Open the vent ball valve PBV-506 to allow the gas in the intake branch and the exhaust branch to be discharged through the vent pipe, so that the pressure in the intake branch and the exhaust branch is reduced.

[0131] When the pressure in the exhaust branch is less than the preset value, the vent ball valve PBV-506 is closed to isolate the intake branch and the exhaust branch from the outside, and the intake branch, the exhaust branch and the return branch form a sealed space.

[0132] After a fourth preset time, the oil drain valve PBV-503 is opened to reduce the pressure of the hydraulic oil in the compressor cylinder head and reduce the load on the crankshaft connecting rod mechanism; the fourth preset time can be 20 seconds.

[0133] The compressor will shut off after a fifth preset time; the fifth preset time can be 30 seconds.

[0134] Oil pump P400 will be shut off after a sixth preset time; the sixth preset time can be 60 seconds.

[0135] After a seventh preset time, the reflux ball valve PBV-505 is closed to disconnect the intake branch and the exhaust branch; the seventh preset time can be 10 seconds.

[0136] Close the drain valve PBV-503.

[0137] This invention aims to protect a skid-mounted booster unit, comprising: a pre-module, a booster module, a hydrogen dispenser, and a hydrogen storage container; the two output terminals of the pre-module are respectively connected to the input terminal of the booster module and the first input terminal of the hydrogen dispenser, and deliver externally input hydrogen to the booster module or the hydrogen dispenser according to the signal from the station control system; the output terminal of the booster module is connected to the hydrogen storage container, and the booster module is equipped with a venting pipeline, which releases the internal pressure of the booster module before startup. The skid-mounted booster unit provided by this invention has a venting pipeline in the booster module, which can release the internal pressure of the booster module before startup, thereby reducing the starting resistance of the compressor and increasing its lifespan. Simultaneously, it can also be used to release pressure before maintenance, preventing residual pressure in the pipeline from causing injury to maintenance workers.

[0138] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

[0139] The present invention has been described above with reference to embodiments thereof. However, these embodiments are merely illustrative and not intended to limit the scope of the invention. The scope of the invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the invention, and all such substitutions and modifications should fall within the scope of the invention.

[0140] Although embodiments of the present invention have been described in detail, it should be understood that various changes, substitutions, and modifications can be made to the embodiments of the present invention without departing from the spirit and scope of the invention.

[0141] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A skid-mounted booster device, characterized in that, include: Preamplifier module and booster module; The two output terminals of the pre-module are respectively connected to the input terminal of the booster module and the first input terminal of the hydrogen dispenser, and deliver the externally input hydrogen to the booster module or the hydrogen dispenser according to the signal of the station control system. The output end of the booster module is connected to a hydrogen storage container. The booster module is equipped with a venting pipeline, which releases the internal pressure of the booster module before it is started. The booster module also includes: a compressor, an intake branch, an exhaust branch, and a return branch; The compressor's input end is connected to the end of the intake branch, and its output end is connected to the beginning of the exhaust branch; The two ends of the return branch are respectively connected to the intake branch and the exhaust branch; The vent pipe is connected to the exhaust branch or the intake branch; The venting line and the return branch are connected before the compressor starts according to a preset rule to release the pressure in the intake branch and the exhaust branch. When the return branch is open, the intake branch and the exhaust branch are connected, so that the pressure in the intake branch and the exhaust branch is the same; When the venting pipe is open, the gas in the intake branch and the exhaust branch is discharged through the venting pipe, thereby reducing the pressure in the intake branch and the exhaust branch. The return branch includes a return ball valve (PBV-505), one end of which is connected via a pipe between the first filter (GF10) and the first buffer tank (IBT) of the intake branch; The other end is connected via a pipe between the air cooler (GC) and the first check valve (HCV06) of the exhaust branch.

2. The skid-mounted booster device according to claim 1, characterized in that, The intake branch includes a first filter (GF10) and a first buffer tank (IBT); The first filter (GF10), the first buffer tank (IBT), and the compressor input are connected in sequence via pipes; The exhaust branch includes a second buffer tank (EBT), an air cooler (GC), a first check valve (HCV06), and an exhaust ball valve (PBV-507); The compressor output, the second buffer tank (EBT), the gas cooler (GC), the first check valve (HCV06), and the exhaust ball valve (PBV-507) are connected in sequence via pipelines.

3. The skid-mounted booster device according to claim 2, characterized in that, The venting pipeline includes: a venting ball valve (PBV-506) and a second check valve (HV08); The first end of the vent ball valve (PBV-506) is connected via a pipe between the gas cooler (GC) and the first check valve (HCV06) in the exhaust branch, and the second end is connected via a pipe to the first end of the second check valve (HV08). The second end of the second check valve (HV08) is connected to an external pipeline via a pipe.

4. The skid-mounted booster device according to claim 3, characterized in that, The front-end module includes: an intake pipe, a first exhaust branch, a second exhaust branch, and a pressure monitoring branch; The pressure monitoring branch is connected to the intake pipe to monitor the intake pressure; The beginning of the first exhaust branch is connected to the end of the intake pipe, and the end of the first exhaust branch is connected to the hydrogen refueling machine. The beginning of the second exhaust branch is connected to the end of the intake pipe, and the end of the second exhaust branch is connected to the booster module. The first exhaust branch and the second exhaust branch introduce the gas into the hydrogen dispenser or the booster module according to the signal from the station control system.

5. The skid-mounted booster device according to claim 4, characterized in that, The second exhaust branch includes a second valve (PBV-502), one end of which is connected via a pipe. The other end of the intake pipe is connected to the booster module via a pipe.

6. A method for light-load start-up of a skid-mounted booster unit, characterized in that, Applied to the skid-mounted booster equipment as described in claim 5, the method includes: Close the second valve (PBV-502) and the exhaust ball valve (PBV-507) to prevent gas from the external hydrogen pipeline from entering the pressurization module; Open the venting ball valve (PBV-506) to connect the intake branch and the exhaust branch, and make the pressure in the intake branch and the exhaust branch the same; Open the reflux ball valve (PBV-505) to allow the gas in the intake branch and the exhaust branch to be discharged through the vent pipe, thereby reducing the pressure in the intake branch and the exhaust branch; Open the drain valve (PBV-503) to reduce the pressure of the hydraulic oil in the compressor cylinder head and reduce the load on the crankshaft connecting rod mechanism; When the pressure in the exhaust branch is less than the preset value, the vent ball valve (PBV-506) is closed to isolate the intake branch and the exhaust branch from the outside, and the intake branch, the exhaust branch and the return branch form a sealed space. The oil pump (P400) is activated after the first preset time to allow the lubricating oil to flow quickly to the compressor; The compressor is started after a second preset time, so that the gas in the intake branch, the exhaust branch and the return branch circulates in the intake branch, the exhaust branch and the return branch; While starting the compressor, close the oil drain valve (PBV-503) to ensure that the lubricating oil at the compressor meets the preset pressure; After the third preset time, the return ball valve (PBV-505) is closed, and the second valve (PBV-502) and the exhaust ball valve (PBV-507) are opened, so that external gas enters through the intake branch under the drive of the compressor and is discharged from the exhaust branch.

7. A method for light-load shutdown of a skid-mounted booster unit, characterized in that, Applied to the skid-mounted booster equipment as described in claim 5, the method includes: Close the second valve (PBV-502) and the exhaust ball valve (PBV-507) to prevent gas from the external hydrogen pipeline from entering the pressurization module; Open the reflux ball valve (PBV-505) to connect the intake branch and the exhaust branch, so that the pressure in the intake branch and the exhaust branch is the same. Open the vent ball valve (PBV-506) to allow the gas in the intake branch and the exhaust branch to be discharged through the vent pipe, so that the pressure in the intake branch and the exhaust branch is reduced. When the pressure in the exhaust branch is less than the preset value, the vent ball valve (PBV-506) is closed to isolate the intake branch and the exhaust branch from the outside, and the intake branch, the exhaust branch and the return branch form a sealed space. After the fourth preset time, the oil drain valve (PBV-503) is opened to reduce the pressure of the hydraulic oil in the compressor cylinder head and reduce the load on the crankshaft connecting rod mechanism. The compressor will shut off after the fifth preset time. The oil pump (P400) will be shut off after the sixth preset time. After a seventh preset time, the reflux ball valve (PBV-505) is closed to disconnect the intake branch and the exhaust branch. Close the drain valve (PBV-503).

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