Hydrogen filling system and method with greasy dirt invasion detection and control functions

Abstract

The invention discloses a hydrogen filling system with greasy dirt invasion detection and control functions. The system comprises a hydrogenation pipeline, and a greasy dirt invasion detection control assembly and a hydrogenation assembly which are arranged on the hydrogenation pipeline, the greasy dirt invasion detection control assembly is arranged at the front end of the hydrogenation pipeline and is used for detecting and removing greasy dirt contained in hydrogen input by the hydrogenation pipeline; and the hydrogenation assembly is arranged at the rear end of the hydrogenation pipeline and is used for injecting hydrogen without oil dirt into the hydrogen using equipment. According to the method disclosed by the invention, oil contamination invasion prevention control can be carried out on hydrogen entering a hydrogen filling system, so that the problems that the fuel cell is not pure in a hydrogen source filled at the front end, so that the galvanic pile performance and the service life are greatly reduced, and meanwhile, a large amount of manpower, material resources and financial resources are consumed when oil contamination in a hydrogen filling machine and a hydrogen energy automobile is cleaned are solved.

Description

Technical Field

[0001] The present invention relates to the field of hydrogen filling systems, and in particular to a hydrogen filling system and method with oil pollution intrusion detection and control functions. Background Art

[0002] Among the supporting equipment in the hydrogen refueling station, the hydrogen compressor requires hydraulic oil to participate in the pressurization of hydrogen due to its working principle. Sometimes the hydraulic oil of the hydrogen compressor leaks into the hydrogen side and contaminates the hydrogen, and is transported downstream with the hydrogen, and even enters the onboard gas cylinder of the fuel cell vehicle, resulting in a significant decrease in the performance and life of the fuel cell stack. Cleaning the oil stains in the system pipelines, hydrogen refueling machines, and hydrogen-powered vehicles will consume a lot of manpower, material resources, and financial resources.

[0003] In order to solve the above problems, the patent document with application number 202411632133.0 discloses an online oil pollution detection and purging system and method for a hydrogen refueling station. The system includes a compressor, a hydrogen storage component and a hydrogen refueling machine connected in sequence through pipelines. The compressor receives hydrogen input, and the hydrogen refueling machine fills the target object with hydrogen; on the connecting pipeline between the compressor and the hydrogen storage component, a first detection component, an oil pollution filter and a second detection component are arranged in sequence from one side of the compressor; the first detection component and the second detection component are both used to detect the oil pollution data of their own positions, and feed the oil pollution data back to the central control unit; the oil pollution filter is used to block oil pollution and slow down the speed of oil pollution in the pipeline; the central control unit is used to control the start and stop of the compressor and the hydrogen refueling machine according to the received oil pollution data.

[0004] The above-mentioned system structure design improves the accuracy of oil pollution detection and ensures the safety of the hydrogenation process. At the same time, it has efficient reverse sewage purge capability, effectively preventing oil pollution from entering the on-board gas cylinder and ensuring the normal operation of the vehicle fuel cell.

[0005] However, the system structure of the above technical solution is complex, and additional structures need to be set up to increase the accuracy of oil pollution detection. In addition, since the detection component feeds back the oil pollution data to the central control unit, and the central control unit controls the start and stop of the compressor and the hydrogenator, there is still a time difference, which will cause some oil-containing hydrogen to enter the back-end equipment.

[0006] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Summary of the invention

[0007] The purpose of the present invention is to provide a hydrogen filling system and method with oil pollution intrusion detection and control functions to solve the problems existing in the prior art.

[0008] The above technical objectives of the present invention are achieved through the following technical solutions:

[0009] A hydrogen filling system with oil pollution intrusion detection and control functions, comprising a hydrogenation pipeline, and an oil pollution intrusion detection control component and a hydrogenation component arranged on the hydrogenation pipeline;

[0010] The oil intrusion detection control component is arranged at the front end of the hydrogenation pipeline, and is used to detect and remove the oil contained in the hydrogen input from the hydrogenation pipeline;

[0011] The hydrogenation assembly is arranged at the rear end of the hydrogenation pipeline, and is used to inject oil-free hydrogen into the hydrogen-using equipment.

[0012] Furthermore, the hydrogenation pipeline is provided with

[0013] An air inlet, which is used to input hydrogen into the hydrogenation pipeline;

[0014] An inlet needle valve, which is used to adjust the hydrogen flow in the hydrogenation pipeline;

[0015] The impurity filter is used to filter the non-oil impurities contained in the hydrogen in the hydrogenation pipeline.

[0016] Furthermore, the oil intrusion detection control component includes an oil filter and a pressure differential alarm arranged in sequence along the front end of the hydrogenation pipeline, which are used to capture the oil in the hydrogen, and form a pressure differential by blocking the oil at the inlet and outlet of the oil filter and the pressure differential alarm. If the pressure differential reaches the alarm condition, the hydrogenation pipeline is cut off in conjunction with the emergency shut-off valve;

[0017] A gas-liquid separator, which is used to separate the oil-containing hydrogen that partially flows out of the oil filter and the pressure difference alarm into gas and liquid;

[0018] A flow meter, which is used to measure the flow of hydrogen flowing through the hydrogenation pipeline;

[0019] An automatic regulating valve, which is used to regulate the flow of hydrogen flowing through the hydrogenation pipeline;

[0020] Emergency shut-off valve, which is used to cut off the hydrogenation pipeline.

[0021] Furthermore, the hydrogenation assembly comprises

[0022] A pressure sensor, which is used to detect the hydrogen pressure in the hydrogenation pipeline;

[0023] A temperature sensor, which is used to detect the temperature of hydrogen in the hydrogenation pipeline;

[0024] A first hydrogenation branch and a second hydrogenation branch connected in parallel are provided at the rear end of the pressure sensor and the temperature sensor, and a hydrogen control valve and a pressure gauge are provided on the first hydrogenation branch and the second hydrogenation branch respectively;

[0025] A hydrogenation hose is provided at the end of the first hydrogenation branch and the second hydrogenation branch. The inlet end of the hydrogenation hose is connected to the hydrogenation pipeline through a break valve, and the outlet end of the hydrogenation pipeline is connected to the hydrogenation gun.

[0026] Furthermore, a venting pipeline is provided between the oil intrusion detection control component and the hydrogenation component, and a needle valve for controlling on and off is provided on the venting pipeline.

[0027] Furthermore, the hydrogenation pipeline at the rear end of the pressure sensor is provided with a safety pipeline connected to the venting pipeline, and a safety valve is provided on the safety pipeline.

[0028] A hydrogen filling method with oil pollution intrusion detection and control function comprises the following steps:

[0029] S1. Connect the hydrogenation pipeline to the high-pressure gas source. The high-pressure hydrogen enters the hydrogenation pipeline through the air inlet, and flows through the air inlet needle valve and impurity filter in sequence to remove non-oil impurities, and then is transported to the oil filter and pressure differential alarm;

[0030] S2. When hydrogen flows through the oil filter and the differential pressure alarm, if the hydrogen contains oil, the oil in the hydrogen will be blocked at the inlet and outlet of the oil filter and the differential pressure alarm to form a pressure difference. If the pressure difference reaches the alarm condition, the hydrogenation pipeline will be cut off by the emergency shut-off valve to stop hydrogenation;

[0031] S3. In the above process, there will still be oily hydrogen flowing out of the oil filter and the pressure differential alarm. This part of the hydrogen will enter the gas-liquid separator for gas-liquid separation, and finally enter the hydrogenation component after the flow meter and automatic regulating valve measure and adjust the flow;

[0032] S4. The hydrogenation assembly is provided with several hydrogenation branches, which can simultaneously fill hydrogen for multiple hydrogen-using equipment. A hydrogen control valve and a pressure gauge are provided in sequence on each hydrogenation branch. A hydrogenation gun is provided at the end of the hydrogenation branch. The hydrogenation gun is connected to a breakaway valve provided at the end of the hydrogenation pipeline through a hydrogenation hose;

[0033] S5. When the external tension on the hydrogenation gun or hydrogenation hose reaches a certain value, the hydrogenation hose will automatically fall off and the break valve will automatically close to prevent hydrogen leakage.

[0034] In summary, the present invention has the following beneficial effects:

[0035] The hydrogen entering the hydrogen filling system can be controlled to prevent oil intrusion, so as to avoid a significant decrease in the performance and life of the fuel cell stack due to impure hydrogen gas source at the front end. At the same time, cleaning the oil stains in the hydrogen filling machine and hydrogen-powered vehicles will consume a lot of manpower, material and financial resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1It is a schematic diagram of the hydrogen filling system with oil pollution intrusion detection and control function described in the present invention.

[0037] Figure 2 It is a schematic diagram of the oil intrusion detection control component described in the present invention.

[0038] Figure 3 Schematic diagram of the hydrogenation assembly of the present invention. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with illustrations and specific embodiments.

[0040] like Figures 1 to 3 As shown, the present invention provides a hydrogen filling system with oil pollution intrusion detection and control functions, comprising a hydrogenation pipeline 1, and an oil pollution intrusion detection control component 2 and a hydrogenation component 3 arranged on the hydrogenation pipeline 1;

[0041] The oil intrusion detection control component 2 is arranged at the front end of the hydrogenation pipeline 1, and is used to detect and remove the oil contained in the hydrogen input from the hydrogenation pipeline 1;

[0042] The hydrogenation assembly 3 is arranged at the rear end of the hydrogenation pipeline 1 and is used to inject oil-free hydrogen into hydrogen-using equipment.

[0043] The hydrogenation pipeline 1 is provided with

[0044] A gas inlet 11, which is used to input hydrogen into the hydrogenation pipeline 1;

[0045] An air inlet needle valve 12, which is used to adjust the hydrogen flow in the hydrogenation pipeline 1;

[0046] The impurity filter 13 is used to filter non-oil impurities contained in the hydrogen in the hydrogenation pipeline 1 .

[0047] The oil pollution intrusion detection control component 2 includes a plurality of components arranged in sequence along the front end of the hydrogenation pipeline 1.

[0048] The oil filter and differential pressure alarm 21 is used to capture oil in hydrogen and form a pressure difference by blocking the oil at the inlet and outlet of the oil filter and differential pressure alarm 4. If the pressure difference reaches the alarm condition, it will be linked with the emergency shut-off valve 25 to cut off the hydrogenation pipeline 1;

[0049] A gas-liquid separator 22, which is used to separate the oil-containing hydrogen that partially flows out of the oil filter and the pressure difference alarm 21 into gas and liquid;

[0050] A flow meter 23, which is used to measure the flow of hydrogen flowing through the hydrogenation pipeline 1;

[0051] An automatic regulating valve 24, which is used to regulate the flow of hydrogen flowing through the hydrogenation pipeline 1;

[0052] The emergency shut-off valve 25 is used to cut off the hydrogenation pipeline 1 .

[0053] The hydrogenation assembly 3 comprises

[0054] A pressure sensor 31, which is used to detect the hydrogen pressure in the hydrogenation pipeline 1;

[0055] A temperature sensor 32, which is used to detect the temperature of hydrogen in the hydrogenation pipeline 1;

[0056] A first hydrogenation branch 33 and a second hydrogenation branch 34 are provided in parallel at the rear end of the pressure sensor 31 and the temperature sensor 32, and a hydrogen control valve 35 and a pressure gauge 36 are provided on the first hydrogenation branch 33 and the second hydrogenation branch 34 respectively;

[0057] A hydrogenation hose 37 is provided at the ends of the first hydrogenation branch 33 and the second hydrogenation branch 34 . The inlet end of the hydrogenation hose 37 is connected to the hydrogenation pipeline 1 through a break valve 38 , and the outlet end of the hydrogenation pipeline 1 is connected to a hydrogenation gun 39 .

[0058] A venting pipeline 19 is provided between the oil intrusion detection control component 2 and the hydrogenation component 3, and a needle valve 20 for controlling on and off is provided on the venting pipeline 19.

[0059] The hydrogenation pipeline 1 at the rear end of the pressure sensor 31 is provided with a safety pipeline 26 connected with the venting pipeline 19 , and a safety valve 27 is provided on the safety pipeline 26 .

[0060] A hydrogen filling method with oil pollution intrusion detection and control function comprises the following steps:

[0061] S1. Connect the hydrogenation pipeline 1 to the high-pressure gas source. The high-pressure hydrogen enters the hydrogenation pipeline 1 through the air inlet 11, and flows through the air intake needle valve 12 and the impurity filter 13 in sequence to remove non-oil impurities, and then is transported to the oil filter and the pressure differential alarm 21;

[0062] S2. When hydrogen flows through the oil filter and the differential pressure alarm 21, if the hydrogen contains oil, the oil in the hydrogen will be blocked at the inlet and outlet of the oil filter and the differential pressure alarm 4 to form a pressure difference. If the pressure difference reaches the alarm condition, the hydrogenation pipeline 1 is cut off by the emergency shut-off valve 25 to stop hydrogenation;

[0063] S3. In the above process, there will still be oily hydrogen flowing out of the oil filter and the pressure differential alarm 21. This part of the hydrogen will enter the gas-liquid separator 22 for gas-liquid separation, and finally enter the hydrogenation component 3 after the flow meter 23 and the automatic regulating valve 24 measure and adjust the flow rate;

[0064] S4. The hydrogenation assembly 3 is provided with a plurality of hydrogenation branches, which can simultaneously fill hydrogen for a plurality of hydrogen-using devices. A hydrogen control valve 35 and a pressure gauge 36 are provided in sequence on each hydrogenation branch. A hydrogenation gun 39 is provided at the end of the hydrogenation branch. The hydrogenation gun 39 is connected to a breakaway valve 38 provided at the end of the hydrogenation pipeline 1 through a hydrogenation hose 37;

[0065] S5. When the external tension on the hydrogenation gun 39 or the hydrogenation hose 37 reaches a certain value, the hydrogenation hose 37 will automatically fall off, and the break valve 38 will automatically close to prevent hydrogen leakage.

[0066] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore should not be understood as limitations of the present invention.

[0067] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydrogen filling system with oil pollution intrusion detection and control function, characterized in that: It comprises a hydrogenation pipeline (1), and an oil pollution intrusion detection control component (2) and a hydrogenation component (3) arranged on the hydrogenation pipeline (1); The oil intrusion detection control component (2) is arranged at the front end of the hydrogenation pipeline (1) and is used to detect and remove the oil contained in the hydrogen input from the hydrogenation pipeline (1); The hydrogenation assembly (3) is arranged at the rear end of the hydrogenation pipeline (1) and is used to inject oil-free hydrogen into hydrogen-using equipment.

2. The hydrogen filling system and method with oil pollution intrusion detection and control function according to claim 1 is characterized in that: The hydrogenation pipeline (1) is provided with A gas inlet (11) for inputting hydrogen into the hydrogenation pipeline (1); An air inlet needle valve (12), which is used to adjust the flow rate of hydrogen in the hydrogenation pipeline (1); The impurity filter (13) is used to filter non-oil impurities contained in the hydrogen in the hydrogenation pipeline (1).

3. The hydrogen filling system with oil pollution intrusion detection and control function according to claim 1 is characterized in that: The oil pollution intrusion detection control component (2) comprises: The oil filter and differential pressure alarm (21) are used to capture oil in the hydrogen and form a pressure difference by blocking the oil at the inlet and outlet of the oil filter and differential pressure alarm (4). If the pressure difference reaches the alarm condition, the hydrogenation pipeline (1) is cut off in conjunction with the emergency shut-off valve (25); A gas-liquid separator (22) for separating the oil-containing hydrogen gas that partially flows out of the oil filter and the differential pressure alarm (21) into gas and liquid; A flow meter (23) for measuring the flow of hydrogen flowing through the hydrogenation pipeline (1); An automatic regulating valve (24) for regulating the flow rate of hydrogen flowing through the hydrogenation pipeline (1); An emergency shut-off valve (25) is used to shut off the hydrogenation pipeline (1).

4. The hydrogen filling system with oil pollution intrusion detection and control function according to claim 1 is characterized in that: The hydrogenation assembly (3) comprises A pressure sensor (31) for detecting the hydrogen pressure in the hydrogenation pipeline (1); A temperature sensor (32) for detecting the temperature of hydrogen in the hydrogenation pipeline (1); A first hydrogenation branch (33) and a second hydrogenation branch (34) are provided in parallel at the rear end of the pressure sensor (31) and the temperature sensor (32), and a hydrogen control valve (35) and a pressure gauge (36) are provided on the first hydrogenation branch (33) and the second hydrogenation branch (34) respectively; A hydrogenation hose (37) is provided at the ends of the first hydrogenation branch (33) and the second hydrogenation branch (34); the inlet end of the hydrogenation hose (37) is connected to the hydrogenation pipeline (1) via a break valve (38); and the outlet end of the hydrogenation pipeline (1) is connected to a hydrogenation gun (39).

5. The hydrogen filling system with oil pollution intrusion detection and control function according to claim 4 is characterized in that: A venting pipeline (19) is provided between the oil intrusion detection control component (2) and the hydrogenation component (3), and a needle valve (20) for controlling on and off is provided on the venting pipeline (19).

6. The hydrogen filling system with oil pollution intrusion detection and control function according to claim 5 is characterized in that: The hydrogenation pipeline (1) at the rear end of the pressure sensor (31) is provided with a safety pipeline (26) connected to the venting pipeline (19), and a safety valve (27) is provided on the safety pipeline (26).

7. A hydrogen filling method with oil pollution intrusion detection and control function, characterized in that: The steps include: S1. The hydrogenation pipeline (1) is connected to a high-pressure gas source. The high-pressure hydrogen enters the hydrogenation pipeline (1) through the air inlet (11), and flows through the air inlet needle valve (12) and the impurity filter (13) in sequence to remove non-oil impurities, and then is transported to the oil filter and the pressure differential alarm (21); S2. When hydrogen flows through the oil filter and the differential pressure alarm (21), if the hydrogen contains oil, the oil in the hydrogen will be blocked at the inlet and outlet of the oil filter and the differential pressure alarm (4) to form a pressure difference. If the pressure difference reaches the alarm condition, the hydrogenation pipeline (1) is cut off through the emergency shut-off valve (25) to stop hydrogenation; S3. In the above process, oily hydrogen will still flow out of the oil filter and the pressure differential alarm (21). This part of the hydrogen will enter the gas-liquid separator (22) for gas-liquid separation, and finally enter the hydrogenation component (3) after the flow rate is measured and adjusted by the flow meter (23) and the automatic regulating valve (24); S4. The hydrogenation assembly (3) is provided with a plurality of hydrogenation branches, which can simultaneously fill hydrogen for a plurality of hydrogen-using devices. A hydrogen control valve (35) and a pressure gauge (36) are provided in sequence on each hydrogenation branch. A hydrogenation gun (39) is provided at the end of the hydrogenation branch. The hydrogenation gun (39) is connected to a breakaway valve (38) provided at the end of the hydrogenation pipeline (1) through a hydrogenation hose (37); S5. When the external tension on the hydrogenation gun (39) or the hydrogenation hose (37) reaches a certain value, the hydrogenation hose (37) will automatically fall off and the break valve (38) will automatically close to prevent hydrogen leakage.

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