High-capacity 20MPa gaseous hydrogen storage tank sequence control system

Abstract

The utility model provides a sequence control system for high-capacity 20MPa gaseous hydrogen storage tanks, which relates to the field of hydrogenation and comprises a hydrogen storage tank group comprising a plurality of 20MPa hydrogen storage tanks, each 20MPa hydrogen storage tank is correspondingly connected with a first hydrogen supply branch, and a first pressure sensor and a first electromagnetic valve are sequentially mounted on each hydrogen supply branch; the hydrogen using device is connected with a second hydrogen supply branch; a second pressure sensor and a second electromagnetic valve are sequentially mounted on the second hydrogen supply branch; a compressor is mounted at the front end of the hydrogen production pry; one end of the hydrogen supply pipeline is communicated with the first hydrogen supply branch, the other end of the hydrogen supply pipeline is communicated with the second hydrogen supply branch and the compressor, and a third electromagnetic valve is further mounted on the hydrogen supply pipeline; the controller is electrically connected with the first pressure sensor, the first electromagnetic valve, the second pressure sensor, the second electromagnetic valve, the third electromagnetic valve, the compressor and the hydrogen production pry. Reasonable gas taking is achieved according to the pressure difference in the hydrogen storage tank sets and the hydrogen using device, the starting frequency and time of a compressor can be reduced through the reasonable hydrogen mixing process between the hydrogen storage tank sets, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogenation, in particular to a large-capacity 20MPa gaseous hydrogen storage tank sequential control system. Background Art

[0002] At present, the sequential control cabinet is mainly suitable for 45MPa hydrogen storage tank groups, and cooperates with the station control system of the hydrogen refueling station to sequentially extract gas from the 45MPa hydrogen storage tank group to charge the vehicle with hydrogen. However, the gas storage / extraction of the 20MPa hydrogen storage tank and the charging of the long-tube trailer are all achieved through the on-off switch of the pipeline at the system control site. At the same time, the gas source used for gas extraction can only be maintained at a single gas source, and it is impossible to achieve sequential gas extraction like 45MPa, that is, to reasonably choose to switch the gas source according to the pressure of the front-end gas supply and the gas pressure demand at the back end.

[0003] At the same time, because the hydrogen usage level of each 20MPa hydrogen storage tank is different, when there is a need to fill the hydrogen storage tank, some 20MPa hydrogen storage tanks use less hydrogen, and some 20MPa hydrogen storage tanks use more hydrogen. Therefore, when the front-end gas source compressor is started, only some 20MPa hydrogen storage tanks with more gas usage will be filled with hydrogen. Each time the compressor is started, more electricity is consumed, which increases the energy consumption at the site of use.

[0004] When the hydrogen in the 20MPa hydrogen storage tank is insufficient, it is usually necessary to start the hydrogen production end to produce hydrogen for the back-end use. When the back-end has different requirements for the use pressure, it is usually necessary to take gas from a variety of hydrogen storage containers, resulting in the need to install more hydrogen storage containers, pipeline valves and instruments on site to control the gas extraction. Utility Model Content

[0005] In view of this, an embodiment of the utility model provides a large-capacity 20MPa gaseous hydrogen storage tank sequential control system, aiming to solve the problem that the existing sequential control cabinet is not suitable for 20MPa hydrogen storage tanks to reasonably select and switch the gas source according to the front-end gas supply pressure and the back-end gas pressure requirements.

[0006] The embodiment of the utility model provides a large-capacity 20MPa gaseous hydrogen storage tank sequential control system, comprising:

[0007] A hydrogen storage tank group, wherein the hydrogen storage tank group includes a plurality of 20MPa hydrogen storage tanks, each of which is connected to a corresponding first hydrogen supply branch, and a first pressure sensor and a first solenoid valve are sequentially installed on the hydrogen supply branch;

[0008] A hydrogen-using device, wherein the hydrogen-using device is connected to a second hydrogen supply branch, and a second pressure sensor and a second solenoid valve are sequentially installed on the second hydrogen supply branch;

[0009] A hydrogen production skid, wherein a compressor is installed at the front end of the hydrogen production skid;

[0010] a hydrogen supply pipeline, one end of which is respectively connected to all the first hydrogen supply branches, and the other end of which is connected to the second hydrogen supply branch and the compressor, and a third solenoid valve is also installed on the hydrogen supply pipeline; and

[0011] The controller is electrically connected to the first pressure sensor, the first solenoid valve, the second pressure sensor, the second solenoid valve, the third solenoid valve, the compressor and the hydrogen production skid, respectively, and is used to obtain the pressure data of the first pressure sensor and the second pressure sensor, and control the switching of the first solenoid valve, the second solenoid valve and the third solenoid valve.

[0012] Furthermore, the hydrogen storage tank group also includes a 45MPa hydrogen storage tank, and the 45MPa hydrogen storage tank is connected to the hydrogen supply pipeline through the first hydrogen supply branch.

[0013] Furthermore, a temperature sensor is also provided on the first hydrogen supply branch.

[0014] Furthermore, the hydrogen-using device comprises a long tube trailer.

[0015] Furthermore, the hydrogen-using device also includes a multi-operating-condition gas nozzle for connecting to a gas-using device within the range of 2-45 MPa.

[0016] Furthermore, a first self-operated pressure regulating valve is installed on the second hydrogen supply branch connected to the multi-operating-mode gas nozzle, and the first self-operated pressure regulating valve is electrically connected to the controller.

[0017] Furthermore, it also includes a third air supply branch, one end of which is arranged between the compressor and the hydrogen production skid, and the other end is connected to the hydrogen supply pipeline, and a fourth solenoid valve electrically connected to the controller and a second self-operated pressure regulating valve are installed on the third air supply branch.

[0018] Furthermore, it also includes a hydrogen concentration detector, which is arranged outside the hydrogen supply pipeline and is used to detect the hydrogen concentration in the environment outside the hydrogen supply pipeline.

[0019] The beneficial effects of the technical solution provided by the embodiment of the utility model are as follows: the large-capacity 20MPa gaseous hydrogen storage tank sequential control system of the utility model can realize reasonable gas extraction according to the pressure difference between the hydrogen storage tank group and the hydrogen-using device, optimize the hydrogen filling process of the hydrogen-using device, increase the speed of hydrogen filling for the long-tube trailer, and reduce the hydrogen filling time of the long-tube trailer. At the same time, it can also reduce the number and time of starting the compressor at the front end of the sequential control cabinet through a reasonable hydrogen stringing process between the hydrogen storage tank groups, realize the utilization of the residual gas in the hydrogen storage tank group, reduce the energy consumption of the entire hydrogen filling station, and protect the compressor at the front end. At the same time, the present application can also meet the hydrogen demand under different pressure conditions, and can reduce the startup of the hydrogen production skid and reduce the energy consumption of the entire station. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an embodiment of a large-capacity 20MPa gaseous hydrogen storage tank sequential control system provided by the utility model.

[0021] In the figure: 1. Hydrogen storage tank group; 11. 20MPa hydrogen storage tank; 12. 45MPa hydrogen storage tank; 2. First hydrogen supply branch; 21. First pressure sensor; 22. First solenoid valve; 23. Temperature sensor; 3. Second hydrogen supply branch; 31. Second pressure sensor; 32. Second solenoid valve; 4. Hydrogen supply pipeline; 41. Third solenoid valve; 5. Hydrogen use device; 51. Long tube trailer; 52. Multi-condition gas nozzle; 53. First self-operated pressure regulating valve; 6. Hydrogen production skid; 7. Compressor; 8. Third gas supply branch; 81. Fourth solenoid valve; 82. Second self-operated pressure regulating valve; 9. Hydrogen concentration detector; 10. Controller. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the implementation mode of the utility model will be further described below in conjunction with the accompanying drawings.

[0023] Please refer to Figure 1 As shown, an embodiment of the utility model provides a large-capacity 20MPa gaseous hydrogen storage tank sequential control system, including a hydrogen storage tank group 1, a hydrogen using device 5, a hydrogen production skid 6, a hydrogen supply pipeline 4 and a controller 10. The hydrogen storage tank group 1 includes a plurality of 20MPa hydrogen storage tanks 11, each of which is connected to a first hydrogen supply branch 2, on which a first pressure sensor 21 and a first solenoid valve 22 are sequentially installed; the hydrogen using device 5 is connected to a second hydrogen supply branch 3, on which a second pressure sensor 31 and a second solenoid valve 32 are sequentially installed; a compressor 7 is installed at the front end of the hydrogen production pry 6; one end of the hydrogen supply pipeline 4 is connected to all the first hydrogen supply branches 2, and the other end is connected to the second hydrogen supply branch 3 and the compressor 7, and a third solenoid valve 41 is also installed on the hydrogen supply pipeline 4; the controller 10 is electrically connected to the first pressure sensor 21, the first solenoid valve 22, the second pressure sensor 31, the second solenoid valve 32, the third solenoid valve 41, the compressor 7 and the hydrogen production pry 6, respectively, for obtaining the pressure data of the first pressure sensor 21 and the second pressure sensor 31, and controlling the switches of the first solenoid valve 22, the second solenoid valve 32 and the third solenoid valve 41.

[0024] The pressure values ​​in the 20MPa hydrogen storage tank 11 group 1 can be acquired through the first pressure sensor 21 on the first hydrogen supply branch 2. When the hydrogen-using device 5 needs to be charged with hydrogen, the pressure value in the hydrogen-using device 5 is acquired through the second pressure sensor 31 on the second hydrogen supply branch 3. Then, the controller 10 performs pressure difference matching calculation on the pressure values ​​in the hydrogen-using device 5 and each 20MPa hydrogen storage tank 11, thereby controlling the switch of the corresponding first solenoid valve 22, and sequentially charging the hydrogen-using device 5 from the hydrogen storage tank group 1. For example, the 20MPa hydrogen storage tanks 11 in the hydrogen storage tank group 1 are the first hydrogen storage tank, the second hydrogen storage tank, the third hydrogen storage tank, etc., respectively. Assuming that the pressure difference between the first hydrogen storage tank and the hydrogen-using device 5 is the smallest, the first solenoid valve 22, the second solenoid valve 32 and the second solenoid valve 32 on the first hydrogen storage tank are opened, so that the first hydrogen storage tank charges the hydrogen-using device 5 with hydrogen. In this process, the gas can be reasonably taken in and used according to the pressure difference, so that the use order of the 20MPa hydrogen storage tank 11 can be reasonably selected, the hydrogen filling speed can be increased, and the hydrogen filling time can be reduced.

[0025] During use, when some of the 20MPa hydrogen storage tanks 11 have insufficient hydrogen storage capacity, the 20MPa hydrogen storage tank 11 with the highest pressure can be allowed to perform hydrogen connection operation on the 20MPa hydrogen storage tanks 11 with insufficient pressure, and the corresponding first solenoid valve 22 is opened by the controller 10 to connect hydrogen, which can effectively avoid starting the compressor 7 due to insufficient gas consumption of individual 20MPa hydrogen storage tanks 11, reduce the starting frequency of the compressor 7, and thus reduce the energy consumption of the entire system, while increasing the protection of the compressor 7. When all the 20MPa hydrogen storage tanks 11 in the hydrogen storage tank group 1 have insufficient hydrogen storage capacity, the hydrogen production pry 6 and the compressor 7 are started to replenish hydrogen for the 20MPa hydrogen storage tanks 11. During the charging process, hydrogen is filled into the hydrogen storage tank group 1 through the gas supply pipeline and the first hydrogen supply branch 2 by starting the third solenoid valve 41 and the first solenoid valve 22.

[0026] Furthermore, the hydrogen storage tank group 1 also includes a 45MPa hydrogen storage tank 12, and the 45MPa hydrogen storage tank 12 is connected to the hydrogen supply pipeline 4 through the first hydrogen supply branch 2.

[0027] The hydrogen charging range can be increased by providing a 45MPa hydrogen storage tank 12. Since the 20MPa hydrogen storage tank 11 cannot charge the hydrogen-using device 5 to 20MPa, the 45MPa hydrogen storage tank 12 is added. When the 20MPa hydrogen storage tank 11 charges the hydrogen-using device 5 to close to 20MPa, the hydrogen in the 45MPa hydrogen storage tank 12 is finally used to replenish the hydrogen-using device 5 with the hydrogen required to reach 20MPa until the hydrogen charging process is completed.

[0028] When it is necessary to supplement hydrogen to the hydrogen storage tank group 1, all the first solenoid valves 22 and the third solenoid valves 41 are opened, and the compressor 7 sequentially fills the 20MPa hydrogen storage tank 11 and the 45MPa hydrogen storage tank 12 with hydrogen.

[0029] Specifically, a temperature sensor 23 is also provided on the first hydrogen supply branch 2 .

[0030] Specifically, the hydrogen using device 5 includes a long tube trailer 51. Assuming that the pressure difference between the first 20MPa hydrogen storage tank and the long tube trailer 51 is the smallest, the hydrogen in the first hydrogen storage tank is used first, and when the pressure difference between the first 20MPa hydrogen storage tank 11 and the long tube trailer 51 is less than 5MPa, the first solenoid valve 22 on the first 20MPa hydrogen storage tank 11 is closed, and the first solenoid valve 22 on the second 20MPa hydrogen storage tank 11 is opened, and the second 20MPa hydrogen storage tank 11 is switched, and when the pressure difference between the two is less than 4MPa, the 45Mpa hydrogen storage bottle is switched to fill the long tube trailer 51 with hydrogen to the required hydrogen of 20MPa.

[0031] Furthermore, the hydrogen device 5 further includes a multi-condition gas nozzle 52 for connecting to a gas device within the range of 2-45 MPa. Specifically, a first self-operated pressure regulating valve 53 is also installed on the second hydrogen supply branch 3 connected to the multi-condition gas nozzle 52, and the first self-operated pressure regulating valve 53 is electrically connected to the controller 10.

[0032] When the hydrogen pressure requirement of the hydrogen-using section is any value within the range of 2-45 MPa, the second solenoid valve 32 connected to the multi-condition gas nozzle 52 can be opened, and the pressure of the hydrogen in the hydrogen storage tank can be adjusted through the first self-operated pressure regulating valve 53 to meet the different pressure requirements of the hydrogen at the hydrogen-using end.

[0033] Specifically, the system also includes a third gas supply branch 8, one end of the third gas supply branch 8 is arranged between the compressor 7 and the hydrogen production skid 6, and the other end is connected to the hydrogen supply pipeline 4, and a fourth solenoid valve 81 and a second self-operated pressure regulating valve 82 electrically connected to the controller 10 are installed on the third gas supply branch 8.

[0034] The system can also make full use of the remaining gas. When the hydrogen pressure values ​​in the hydrogen storage tank group 1 are lower than the pressure of the long tube trailer 51, the fourth solenoid valve 81 on the third gas supply branch 8 can be opened, and the second solenoid valve 32 on the gas supply pipeline can be closed. The remaining hydrogen in the hydrogen storage tank is depressurized by the second self-operated pressure regulating valve 82, and then transported to the inlet of the compressor 7. The hydrogen in the hydrogen storage tank is directly used as the intake air of the compressor 7, and the compressor 7 is used to directly charge the hydrogen-using device 5 such as the long tube trailer 51, thereby avoiding the start-up of the hydrogen production skid 6.

[0035] Furthermore, it also includes a hydrogen concentration detector 9 which is arranged outside the hydrogen supply pipeline 4 and is used to detect the hydrogen concentration in the environment outside the hydrogen supply pipeline 4 .

[0036] In this application, the large-capacity 20MPa gaseous hydrogen storage tank sequential control system can realize reasonable gas extraction according to the pressure difference between the hydrogen storage tank group 1 and the long tube trailer 51, optimize the hydrogen filling process of the long tube trailer 51, increase the speed of hydrogen filling for the long tube trailer 51, and reduce the hydrogen filling time of the long tube trailer 51. At the same time, it can also reduce the number and time of starting the compressor 7 at the front end of the sequential control cabinet through a reasonable hydrogen series process between the hydrogen storage tank group 1, realize the utilization of the residual gas in the hydrogen storage tank group 1, reduce the energy consumption of the entire hydrogen filling station, and protect the compressor 7 at the front end. At the same time, this application can also meet the hydrogen demand under different pressure conditions, and can reduce the startup of the hydrogen production skid 6 and reduce the energy consumption of the system.

[0037] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0038] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-capacity 20MPa gaseous hydrogen storage tank sequential control system, characterized in that: include: A hydrogen storage tank group, wherein the hydrogen storage tank group includes a plurality of 20MPa hydrogen storage tanks, each of which is connected to a corresponding first hydrogen supply branch, and a first pressure sensor and a first solenoid valve are sequentially installed on the hydrogen supply branch; A hydrogen-using device, wherein the hydrogen-using device is connected to a second hydrogen supply branch, and a second pressure sensor and a second solenoid valve are sequentially installed on the second hydrogen supply branch; A hydrogen production skid, wherein a compressor is installed at the front end of the hydrogen production skid; a hydrogen supply pipeline, one end of which is respectively connected to all the first hydrogen supply branches, and the other end of which is connected to the second hydrogen supply branch and the compressor, and a third solenoid valve is also installed on the hydrogen supply pipeline; and The controller is electrically connected to the first pressure sensor, the first solenoid valve, the second pressure sensor, the second solenoid valve, the third solenoid valve, the compressor and the hydrogen production skid, respectively, and is used to obtain the pressure data of the first pressure sensor and the second pressure sensor, and control the switching of the first solenoid valve, the second solenoid valve and the third solenoid valve.

2. The large-capacity 20MPa gaseous hydrogen storage tank sequential control system according to claim 1 is characterized in that: The hydrogen storage tank group also includes a 45MPa hydrogen storage tank, and the 45MPa hydrogen storage tank is connected to the hydrogen supply pipeline through the first hydrogen supply branch.

3. The large-capacity 20MPa gaseous hydrogen storage tank sequential control system according to claim 1 is characterized in that: The first hydrogen supply branch is also provided with a temperature sensor.

4. The large-capacity 20MPa gaseous hydrogen storage tank sequential control system according to claim 1 is characterized in that: The hydrogen using device comprises a long tube trailer.

5. The large-capacity 20MPa gaseous hydrogen storage tank sequential control system according to claim 4 is characterized in that: The hydrogen-using device also includes a multi-operating-condition gas nozzle for connecting to a gas-using device within a range of 2-45 MPa.

6. The large-capacity 20MPa gaseous hydrogen storage tank sequential control system according to claim 5 is characterized in that: A first self-operated pressure regulating valve is also installed on the second hydrogen supply branch connected to the multi-operating-mode gas nozzle, and the first self-operated pressure regulating valve is electrically connected to the controller.

7. The large-capacity 20MPa gaseous hydrogen storage tank sequential control system according to claim 1 is characterized in that: It also includes a third air supply branch, one end of which is arranged between the compressor and the hydrogen production skid, and the other end is connected to the hydrogen supply pipeline. A fourth solenoid valve and a second self-operated pressure regulating valve electrically connected to the controller are installed on the third air supply branch.

8. The large-capacity 20MPa gaseous hydrogen storage tank sequential control system according to claim 1 is characterized in that: It also includes a hydrogen concentration detector, which is arranged outside the hydrogen supply pipeline and is used to detect the hydrogen concentration in the environment outside the hydrogen supply pipeline.

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