CN218671593U - A high-pressure hydrogen filling system - Google Patents

Abstract

The utility model discloses a high-pressure hydrogen gas filling system, relates to the technical field of gas filling, solves the problems of long filling time and low filling efficiency in the existing high-pressure hydrogen gas filling method, and includes graded low-pressure hydrogen gas stabilizing tanks , a diaphragm compressor, a high-pressure hydrogen hydrogenation column, and at least one main pipeline connected to the outlet end of the graded low-pressure hydrogen surge tank, and the main pipeline is connected in turn with a first program-controlled valve, a diaphragm compressor, and a second program-controlled valve; the second program-controlled valve The main pipeline at the back end is connected with at least one sub-pipeline, and each sub-pipeline is connected to a high-pressure hydrogen hydrogenation column, and each sub-pipeline is connected to a third program-controlled valve; it can realize a diaphragm compressor to a high-pressure hydrogenation column. The filling of hydrogen hydrogenation columns can also realize the filling of multiple high-pressure hydrogen hydrogenation columns by one diaphragm compressor, and the filling of one high-pressure hydrogen hydrogenation column by multiple diaphragm compressors, improving the charging efficiency. installation efficiency, while also enhancing the functionality of the system.

Description

A high-pressure hydrogen filling system

technical field

The utility model relates to the technical field of gas filling, in particular to the technical field of high-pressure hydrogen filling systems.

Background technique

The use of hydrogen as a clean energy is gradually accelerating. Various regions have successively issued hydrogen energy development plans. Hydrogen energy has become a strategic emerging industry. It is estimated that by 2050, hydrogen energy will account for about 10% of my country's terminal energy system. Nearly 60 million tons, of which 24.58 million tons of hydrogen are used in the transportation sector. The hydrogen energy industry chain includes three main links: hydrogen production, hydrogen storage and transportation, and hydrogen use. Among them, the hydrogen storage and transportation link is the intermediate link connecting the hydrogen source and the user. The transportation form from the hydrogen production plant to the hydrogen refueling station is mainly long-tube trailer transportation. The long-tube trailer currently used is composed of a tractor and a tube bundle vehicle. The tractor and the tube bundle vehicle can be separated. The operating pressure of the tube bundle vehicle is 20MPa. The unloading rate is 70% to 85%, that is, the unloading pressure of the tube bundle truck is above 3MPa.

Based on the hydrogen pressure of the hydrogen production plant is generally 1.5-6.0MPa, and the transport pressure of the tube bundle car is 20MPa, so the current common treatment method is to use a diaphragm compressor to compress the hydrogen to above 20MPa to fill the tube bundle car. The pumping volume of a diaphragm compressor can reach 750-1500Nm ³ /h according to the different inlet pressure, while the single filling capacity of a tube bundle car is about 4500Nm ³ /h, according to the conventional configuration of a single compressor filling For a single tube bundle car, the filling time is 3 to 6 hours, which is a long time. For example, if multiple compressors are filling a single tube bundle truck, it is necessary to control the filling flow to avoid excessive temperature rise. At the same time, factors such as the safety of flow adjustment and the timing of filling trucks need to be considered. Specifically, there are mainly two problems as follows.

1) The filling time is relatively long, and the filling time takes 3 to 6 hours;

The conventional treatment method is to connect multiple compressors with multiple pneumatic valves to multiple hydrogenation columns, which has the problems of complex pipelines, numerous valves, and difficult flow control.

2) During the filling process, the risk of overpressure on the filling side is prone to occur;

During the filling process, pressure fluctuations and system overpressure are prone to occur, which is more dangerous for high-pressure hydrogen. The conventional treatment method is to install an overpressure vent valve on the high pressure side or an inverter compressor, but the overpressure vent not only wastes hydrogen, but also has safety problems such as high pressure venting, and the inverter compressor has a higher cost problem.

Utility model content

The purpose of the utility model is to solve the problems of long filling time and low filling efficiency in the existing high-pressure hydrogen filling method. In order to solve the above technical problems, the utility model provides a high-pressure hydrogen filling system.

The utility model specifically adopts the following technical solutions in order to achieve the above object:

A high-pressure hydrogen filling system, comprising a graded low-pressure hydrogen surge tank, a diaphragm compressor, and a high-pressure hydrogen hydrogenation column, the outlet end of the graded low-pressure hydrogen surge tank is connected to at least one main pipeline, and the main pipeline is connected in sequence There are a first program-controlled valve, a diaphragm compressor, and a second program-controlled valve;

The main pipeline at the rear end of the second program-controlled valve is connected with at least one sub-pipeline, each of which is connected to a high-pressure hydrogen hydrogenation column, and each of the sub-pipelines is connected to a third program-controlled valve.

Working principle: When using the high-pressure hydrogen filling system, connect the long pipe car to the high-pressure hydrogen hydrogenation column, and then open the first program-controlled valve, start-stop control valve, diaphragm compressor, second program-controlled valve, and third program-controlled valve in sequence. Valve, high pressure hydrogen hydrogenation column. If only one diaphragm compressor is required to charge multiple high-pressure hydrogen hydrogenation columns, the third program-controlled valves on all sub-pipelines connected between the diaphragm compressor and the high-pressure hydrogen hydrogenation columns will be opened; if necessary When multiple diaphragm compressors fill a high-pressure hydrogen hydrogenation column, the third program-controlled valve on the branch pipeline connected to the high-pressure hydrogen hydrogenation column will be opened (the number of openings of the third program-controlled valve shall be determined according to actual needs. For example, two diaphragm compressors are required to fill a high-pressure hydrogen hydrogenation column, then open the third program-controlled valve on the branch pipeline connected with the two diaphragm compressors).

Compared with the prior art, the high-pressure hydrogen filling system in this application can achieve a high-pressure hydrogen filling system by setting multiple sub-pipelines between the diaphragm compressor and the high-pressure hydrogen hydrogenation column, and by controlling the number of openings of the third program-controlled valve. The filling of one high-pressure hydrogenation column by one diaphragm compressor can also be realized by the filling of multiple high-pressure hydrogenation columns by one diaphragm compressor, and the filling of one high-pressure hydrogenation column by multiple diaphragm compressors can also be realized. The filling of the hydrogen column can not only shorten the filling time of hydrogen, improve the filling efficiency, but also enhance the functionality of the high-pressure hydrogen filling system.

Further, at least two main pipelines are connected to the outlet end of the classified low-pressure hydrogen surge tank, and each main pipeline is sequentially connected with a first program-controlled valve, a diaphragm compressor, and a second program-controlled valve; The rear end of the main pipeline is connected to a sub-pipeline, each of which is connected to a third program-controlled valve, and each of the sub-pipelines is connected to a high-pressure hydrogen hydrogenation column; a through-pipe is connected between two adjacent main pipelines , the connection point between the through pipe and the main pipeline is located between the second programmable valve and the third programmable valve; a flow control valve is connected to the through pipe.

When using the high-pressure hydrogen filling system with this structure, if a diaphragm compressor is required to fill multiple high-pressure hydrogen hydrogenation columns, one diaphragm compressor is turned on, and the corresponding high-pressure hydrogen hydrogenation columns are connected The third program-controlled valve on the sub-pipeline is opened, and the flow control valve connected to the through-pipe is opened, so that one diaphragm compressor can fill multiple high-pressure hydrogen hydrogenation columns; if multiple diaphragm compressors are required to When filling a high-pressure hydrogen hydrogenation column, only open the third program-controlled valve on the sub-pipeline connected to the corresponding high-pressure hydrogen hydrogenation column, and close the other third program-controlled valves, and open multiple flow control valves at the same time. Realize that multiple diaphragm compressors can fill one high-pressure hydrogen hydrogenation column; if one diaphragm compressor is required to fill one high-pressure hydrogen hydrogenation column, all flow control valves are closed, and only the first Three program control valves are enough.

In this application, by connecting a through-pipe between two adjacent main pipelines and connecting a flow control valve on the through-pipe, not only can one diaphragm compressor fill multiple high-pressure hydrogenation columns, but also realize Multiple diaphragm compressors can fill one high-pressure hydrogen hydrogenation column, and one diaphragm compressor can also fill one high-pressure hydrogen hydrogenation column, and this structure reduces a large number of control valves and pipeline channels , which reduces the production cost, and also makes it more convenient for the staff during the operation; at the same time, the connected flow control valve can also control the filling speed.

Further, the diaphragm compressor is connected with an on-off control valve, and the on-off control valve is connected to both ends of the diaphragm compressor.

In this application, by configuring the start-stop control valve for the diaphragm compressor, after the filling is completed, the staff can open the start-stop control valve to balance the pressure at both ends of the diaphragm compressor, avoiding danger caused by excessive pressure difference, and enhancing The safety of the high-pressure hydrogen filling system during use.

Further, the high-pressure hydrogen hydrogenation column is provided with a flow detection unit and a temperature detection unit, and the flow control valve is connected to the flow detection unit and the temperature detection unit in the high-pressure hydrogen hydrogenation column through control cables.

During the filling process, the detection unit of the high-pressure hydrogen hydrogenation column sends out a signal to confirm that the filling is completed, close the flow control valve, then manually close the third program-controlled valve, pop up a signal box to the DCS system display interface, and manually determine whether to stop the compressor Or fill other systems; if it is manually determined that the filling is completed, open the shutdown control valve that controls the diaphragm compressor, and after balancing the pressure, turn off the diaphragm compressor, and then close the first program-controlled valve and the second program-controlled valve.

In this application, the flow control valve is communicated with the flow detection unit in the high-pressure hydrogen hydrogenation column, so that the amount of hydrogen added can be detected through the flow detection unit built in the high-pressure hydrogen hydrogenation column, and the temperature of hydrogen can be detected through the temperature detection unit. When the temperature is too high, the signal can be transmitted to the flow control valve through the temperature detection unit, and then the flow control valve can automatically control the amount of hydrogenation to control the temperature rise, which enhances the automatic control function of the system.

Further, a pressure control structure is connected between the main pipeline and the classified low-pressure hydrogen surge tank.

Wherein, the pressure control structure includes a branch pipeline connected between the main pipeline and the classified low-pressure hydrogen tank, and the connection point between the branch pipeline and the main pipeline is located between the second programmable valve and the Between the third program-controlled valve, the branch pipeline is connected with a pressure protection valve.

When the flow control valve is closed, the outlet pressure of the diaphragm compressor is stabilized by opening the pressure protection valve, so that the hydrogen is returned to the diaphragm compressor and the graded low-pressure hydrogen pressure tank, and the volume buffer provided by the pipeline connected to the graded low-pressure hydrogen pressure tank pressure.

In this application, by connecting the pressure control structure, the pressure in the pipeline can be controlled when the filling is about to end, ensuring the safety of the system operation, and at the same time avoiding the release of hydrogen, which not only reduces the loss of energy, but also reduces the pollution of the environment.

The beneficial effects of the utility model are as follows:

(1) The high-pressure hydrogen filling system in this application can realize a diaphragm compressor by setting multiple sub-pipelines between the diaphragm compressor and the high-pressure hydrogen hydrogenation column, and by controlling the number of openings of the third program-controlled valve. The filling of one high-pressure hydrogen hydrogenation column can also realize the filling of multiple high-pressure hydrogen hydrogenation columns by one diaphragm compressor, and the filling of one high-pressure hydrogen hydrogenation column by multiple diaphragm compressors It can not only shorten the filling time of hydrogen, improve the filling efficiency, but also enhance the functionality of the high-pressure hydrogen filling system;

(2) In this application, by connecting a through pipe between two adjacent main pipelines and connecting a flow control valve on the through pipe, not only can one diaphragm compressor fill multiple high-pressure hydrogen hydrogenation columns, Moreover, multiple diaphragm compressors can be used to fill one high-pressure hydrogen hydrogenation column, and one diaphragm compressor can be used to fill one high-pressure hydrogen hydrogenation column, and this structure reduces a large number of control valves And the pipeline channel, which reduces the production cost, and also makes it easier for the staff during the operation; at the same time, the connected flow control valve can also control the filling speed;

(3) This application configures the start-stop control valve for the diaphragm compressor, then after the filling is completed, the staff can open the start-stop control valve to balance the pressure at both ends of the diaphragm compressor to avoid danger caused by excessive pressure difference , enhancing the safety of the high-pressure hydrogen filling system during use;

(4) In this application, the flow control valve is communicated with the flow detection unit in the high-pressure hydrogen hydrogenation column, so that the hydrogenation amount can be detected by the flow detection unit built in the high-pressure hydrogen hydrogenation column, and the temperature and temperature of the hydrogen can be detected by the temperature detection unit. Temperature rise, when the temperature rises too fast, the signal can be transmitted to the flow control valve through the temperature detection unit, and then the flow control valve can automatically control the amount of hydrogen added to control the temperature rise, which enhances the automatic control function of the system;

(5) By connecting the pressure control structure, this application can realize the control of the pressure in the pipeline when the filling is about to end, ensuring the safety of the system operation, and at the same time avoiding the release of hydrogen gas, which not only reduces the loss of energy, but also Also reduces the pollution to the environment.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 of the present utility model;

Fig. 2 is the structural representation of embodiment 2 of the present utility model;

Fig. 3 is the structural representation of embodiment 3 of the present utility model;

Fig. 4 is a schematic structural view of Embodiment 4 of the present utility model.

Reference signs: 01-graded low-pressure hydrogen tank, 02-main pipeline, 03-first program-controlled valve, 04-diaphragm compressor, 05-on/off control valve, 06-branch pipeline, 07-second program-controlled valve, 08-through pipe, 09-flow control valve, 10-pressure protection valve, 11-third program-controlled valve, 12-high-pressure hydrogen hydrogenation column, 13-sub-pipeline.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model.

Example 1

Referring to Figure 1, the fuel cell hydrogen consumption conditions from the hydrogen production unit are: 3000Nm ³ /h, temperature 40°C, pressure 1.1MpaG; the maximum rated air volume of the diaphragm compressor 04 can reach 750Nm ³ /h, and four diaphragms are set accordingly The compressor 04 corresponds to four high-pressure hydrogen hydrogenation columns 12 one by one.

This embodiment provides a high-pressure hydrogen filling system, which includes a graded low-pressure hydrogen surge tank 01, a diaphragm compressor 04, and a high-pressure hydrogen hydrogenation column 12. The outlet end of the graded low-pressure hydrogen surge tank 01 is connected to four main pipelines 02, Each main pipeline 02 is sequentially connected with a first program-controlled valve 03, a diaphragm compressor 04, and a second program-controlled valve 07;

The main pipeline 02 at the rear end of the second program-controlled valve 07 is connected with four sub-pipelines 13, and each sub-pipeline 13 is correspondingly connected to a high-pressure hydrogen hydrogenation column 12, and each sub-pipeline 13 is connected with a third program-controlled valve 11.

The diaphragm compressor 04 is connected with a start-stop control valve 05, and the start-stop control valve 05 is connected with both ends of the diaphragm compressor 04.

The high-pressure hydrogen hydrogenation column 12 is provided with a flow detection unit and a temperature detection unit, and the flow control valve 09 is connected to the flow detection unit and the temperature detection unit in the high-pressure hydrogen hydrogenation column 12 through control cables.

A pressure control structure is connected between the main pipeline 02 and the graded low-pressure hydrogen surge tank 01. The pressure control structure includes a branch pipeline 06 connected between the main pipeline 02 and the graded low-pressure hydrogen surge tank 01, and the branch pipeline 06 is connected to the main pipeline 02. The connection point is between the second programmable valve 07 and the third programmable valve 11, and the branch pipeline 06 is connected with a pressure protection valve 10.

When using the high-pressure hydrogen filling system, connect the long pipe car to the high-pressure hydrogen hydrogenation column 12, and then open the first program-controlled valve 03, start-stop control valve 05, diaphragm compressor 04, second program-controlled valve 07, pressure A protection valve 10, a third program-controlled valve 11, and a high-pressure hydrogen hydrogenation column 12. If only one diaphragm compressor 04 is needed to fill four high-pressure hydrogenation columns 12, the third program-controlled The valve 11 is opened; if four diaphragm compressors 04 are required to fill a high-pressure hydrogen hydrogenation column 12, the third program-controlled valve 11 on the four sub-pipelines 13 connected to the high-pressure hydrogen hydrogenation column 12 is opened, The third program-controlled valves 11 on the sub-pipelines 13 connected to other high-pressure hydrogenation columns 12 are all closed.

By adopting the technical scheme of this embodiment, the dynamic filling time can be reduced from 6 hours to 1.5 hours.

The volume of graded low-pressure hydrogen surge tank 01 is 27m ³ , which can meet the 6.5min backflow buffer at the maximum filling capacity; when the pressure is increased to 1.6MpaG, it can meet the 1min backflow buffer at the maximum filling capacity, and the overall reduction can be 95 % overpressure venting.

Example 2

Referring to Figure 2, the fuel cell hydrogen supply conditions from the hydrogen production unit are: 3000Nm ³ /h, temperature 40°C, pressure 1.1MpaG; the maximum rated gas volume of the diaphragm compressor 04 can reach 750Nm ³ /h, and four diaphragms are set accordingly The compressor 04 corresponds to four high-pressure hydrogen hydrogenation columns 12 one by one.

This embodiment provides a high-pressure hydrogen filling system, which includes a graded low-pressure hydrogen surge tank 01, a diaphragm compressor 04, and a high-pressure hydrogen hydrogenation column 12. The outlet end of the graded low-pressure hydrogen surge tank 01 is connected to four main pipelines 02, Each main pipeline 02 is sequentially connected with the first program-controlled valve 03, diaphragm compressor 04, and second program-controlled valve 07; the rear end of each main pipeline 02 is connected with a sub-pipe 13, and the sub-pipe 13 is connected with a third Program-controlled valve 11, each sub-pipeline 13 is connected to a high-pressure hydrogen hydrogenation column 12; a through-pipe 08 is connected between two adjacent main pipelines 02, and the connection point between the through-pipe 08 and the main pipeline 02 is located at the second program-controlled valve 07 and the third program-controlled valve 11; flow control valve 09 is connected to the through pipe 08.

The diaphragm compressor 04 is connected with a start-stop control valve 05, and the start-stop control valve 05 is connected with both ends of the diaphragm compressor 04.

The high-pressure hydrogen hydrogenation column 12 is provided with a flow detection unit and a temperature detection unit, and the flow control valve 09 is connected to the flow detection unit and the temperature detection unit in the high-pressure hydrogen hydrogenation column 12 through control cables.

A pressure control structure is connected between the main pipeline 02 and the graded low-pressure hydrogen surge tank 01. The pressure control structure includes a branch pipeline 06 connected between the main pipeline 02 and the graded low-pressure hydrogen surge tank 01, and the branch pipeline 06 is connected to the main pipeline 02. The connection point is between the second programmable valve 07 and the third programmable valve 11, and the branch pipeline 06 is connected with a pressure protection valve 10.

When using the high-pressure hydrogen filling system with this structure, if one diaphragm compressor 04 is required to fill four high-pressure hydrogen hydrogenation columns 12, one diaphragm compressor 04 is turned on, and the corresponding high-pressure hydrogen hydrogenation column 12 is connected. The third programmable valve 11 on the main pipeline 02 of the hydrogen column 12 is opened, and the flow control valve 09 connected to the through pipe 08 is opened, so that one diaphragm compressor 04 can charge four high-pressure hydrogen hydrogenation columns 12 If four diaphragm compressors 04 are required to fill one high-pressure hydrogen hydrogenation column 12, only the third program-controlled valve 11 on the main pipeline 02 connected to the corresponding high-pressure hydrogen hydrogenation column 12 is opened, and the other third All the program-controlled valves 11 are closed, and the four flow control valves 09 are opened at the same time, so that four diaphragm compressors 04 can be used to fill one high-pressure hydrogen hydrogenation column 12; if one diaphragm compressor 04 is required to charge one high-pressure hydrogen When the hydrogenation column 12 is filled, all the flow control valves 09 are closed, and only the third programmable valve 11 is opened.

By adopting the technical scheme of this embodiment, the dynamic filling time can be reduced from 6 hours to 1.5 hours. Different from Embodiment 1, the number of third programmable valves 11 can be reduced from 16 to 7 by adopting the technical solution of this embodiment.

The volume of graded low-pressure hydrogen surge tank 01 is 27m ³ , which can meet the 6.5min backflow buffer at the maximum filling capacity; when the pressure is increased to 1.6MpaG, it can meet the 1min backflow buffer at the maximum filling capacity, and the overall reduction can be 95 % overpressure venting.

Example 3

Referring to Figure 3, the fuel cell hydrogen consumption conditions from the hydrogen production unit are: 12000Nm ³ /h, temperature 40°C, pressure 4.5MpaG; the maximum rated air volume of the diaphragm compressor 04 can reach 1500Nm ³ /h, and eight diaphragms are set accordingly The compressor 04 corresponds to eight high-pressure hydrogen hydrogenation columns 12 one by one.

This embodiment provides a high-pressure hydrogen filling system, including a graded low-pressure hydrogen surge tank 01, a diaphragm compressor 04, and a high-pressure hydrogen hydrogenation column 12. Eight main pipelines 02 are connected to the gas outlet of the graded low-pressure hydrogen surge tank 01, Each main pipeline 02 is sequentially connected with a first program-controlled valve 03, a diaphragm compressor 04, and a second program-controlled valve 07;

The main pipeline 02 at the rear end of the second program-controlled valve 07 is connected with eight sub-pipelines 13, one sub-pipeline 13 is connected with a high-pressure hydrogen hydrogenation column 12, and each sub-pipeline 13 is connected with a third program-controlled valve 11.

The diaphragm compressor 04 is connected with a start-stop control valve 05, and the start-stop control valve 05 is connected with both ends of the diaphragm compressor 04.

The high-pressure hydrogen hydrogenation column 12 is provided with a flow detection unit and a temperature detection unit, and the flow control valve 09 is connected to the flow detection unit and the temperature detection unit in the high-pressure hydrogen hydrogenation column 12 through control cables.

A pressure control structure is connected between the main pipeline 02 and the graded low-pressure hydrogen surge tank 01. The pressure control structure includes a branch pipeline 06 connected between the main pipeline 02 and the graded low-pressure hydrogen surge tank 01, and the branch pipeline 06 is connected to the main pipeline 02. The connection point is between the second programmable valve 07 and the third programmable valve 11, and the branch pipeline 06 is connected with a pressure protection valve 10.

When using the high-pressure hydrogen filling system, connect the long pipe car to the high-pressure hydrogen hydrogenation column 12, and then open the first program-controlled valve 03, start-stop control valve 05, diaphragm compressor 04, second program-controlled valve 07, pressure A protection valve 10, a third program-controlled valve 11, and a high-pressure hydrogen hydrogenation column 12. If only one diaphragm compressor 04 is needed to charge eight high-pressure hydrogen hydrogenation columns 12, the third program-controlled The valve 11 is opened; if eight diaphragm compressors 04 are required to fill a high-pressure hydrogenation column 12, the third program-controlled valve 11 on the four sub-pipelines 13 connected to the high-pressure hydrogenation column 12 is opened, The third program-controlled valves 11 on the sub-pipelines 13 connected to other high-pressure hydrogen hydrogenation columns 12 are all closed.

By adopting the technical scheme of this embodiment, the dynamic filling time can be reduced from 3 hours to 1.5 hours.

The volume of graded low-pressure hydrogen surge tank 01 is 30m ³ , which can meet the 6.5min reflux buffer at the maximum filling capacity; when the pressure is increased to 4.95MpaG, it can meet the 1min reflux buffer at the maximum filling capacity, and the overall reduction can be 95 % overpressure venting.

Example 4

Referring to Figure 4, the fuel cell hydrogen consumption conditions from the hydrogen production unit are: 12000Nm ³ /h, temperature 40°C, pressure 4.5MpaG; the maximum rated air volume of the diaphragm compressor 04 can reach 1500Nm ³ /h, and eight diaphragms are set accordingly The compressor 04 corresponds to eight high-pressure hydrogen hydrogenation columns 12 one by one.

This embodiment provides a high-pressure hydrogen filling system, including a graded low-pressure hydrogen surge tank 01, a diaphragm compressor 04, and a high-pressure hydrogen hydrogenation column 12. Eight main pipelines 02 are connected to the gas outlet of the graded low-pressure hydrogen surge tank 01, Each main pipeline 02 is sequentially connected with the first program-controlled valve 03, diaphragm compressor 04, and second program-controlled valve 07; the rear end of each main pipeline 02 is connected with a sub-pipe 13, and the sub-pipe 13 is connected with a third program-controlled Valve 11, each sub-pipeline 13 is connected to a high-pressure hydrogen hydrogenation column 12; a through-pipe 08 is connected between two adjacent main pipelines 02, and the connection point between the through-pipe 08 and the main pipeline 02 is located at the second program-controlled valve 07 Between the third program control 11; the flow control valve 09 is connected to the through pipe 08.

The diaphragm compressor 04 is connected with a start-stop control valve 05, and the start-stop control valve 05 is connected with both ends of the diaphragm compressor 04.

The high-pressure hydrogen hydrogenation column 12 is provided with a flow detection unit and a temperature detection unit, and the flow control valve 09 is connected to the flow detection unit and the temperature detection unit in the high-pressure hydrogen hydrogenation column 12 through control cables.

A pressure control structure is connected between the main pipeline 02 and the graded low-pressure hydrogen surge tank 01. The pressure control structure includes a branch pipeline 06 connected between the main pipeline 02 and the graded low-pressure hydrogen surge tank 01, and the branch pipeline 06 is connected to the main pipeline 02. The connection point is between the second programmable valve 07 and the third programmable valve 11, and the branch pipeline 06 is connected with a pressure protection valve 10.

When using the high-pressure hydrogen filling system with this structure, if one diaphragm compressor 04 is required to fill eight high-pressure hydrogen hydrogenation columns 12, one diaphragm compressor 04 will be turned on, and the corresponding high-pressure hydrogen hydrogenation columns 12 will be connected. The third programmable valve 11 on the main pipeline 02 of the hydrogen column 12 is opened, and the flow control valve 09 connected to the through pipe 08 is opened, so that one diaphragm compressor 04 can charge eight high-pressure hydrogen hydrogenation columns 12 If eight diaphragm compressors 04 are required to fill one high-pressure hydrogenation column 12, only the third program-controlled valve 11 on the main pipeline 02 connected to the corresponding high-pressure hydrogenation column 12 is opened, and the other third The program-controlled valves 11 are all closed, and the eight flow control valves 09 are opened at the same time, so that eight diaphragm compressors 04 can fill one high-pressure hydrogen hydrogenation column 12; if one diaphragm compressor 04 is required to charge one high-pressure hydrogen When the hydrogenation column 12 is filled, all the flow control valves 09 are closed, and only the third programmable valve 11 is opened.

By adopting the technical scheme of this embodiment, the dynamic filling time can be reduced from 3 hours to 1.5 hours. Different from Embodiment 3, the number of third programmable valves 11 can be reduced from 64 to 12 by adopting the technical solution of this embodiment.

The volume of graded low-pressure hydrogen surge tank 01 is 30m ³ , which can meet the 6.5min reflux buffer at the maximum filling capacity; when the pressure is increased to 4.95MpaG, it can meet the 1min reflux buffer at the maximum filling capacity, and the overall reduction can be 95 % overpressure venting.

Claims (6)

1. A high-pressure hydrogen filling system, comprising a graded low-pressure hydrogen surge tank (01), a diaphragm compressor (04), a high-pressure hydrogen hydrogenation column (12), is characterized in that the graded low-pressure hydrogen surge tank ( The gas outlet of 01) is connected with at least one main pipeline (02), and the first program-controlled valve (03), diaphragm compressor (04), and second program-controlled valve (07) are sequentially connected on the said main pipeline (02); The main pipeline (02) at the rear end of the second program-controlled valve (07) is connected with at least one sub-pipeline (13), and each sub-pipeline (13) is correspondingly connected to a high-pressure hydrogen hydrogenation column (12), each The third program-controlled valves (11) are connected to the sub-pipes (13). 2. A kind of high-pressure hydrogen filling system according to claim 1, characterized in that, at least two main pipelines (02) are connected to the outlet end of the classified low-pressure hydrogen surge tank (01), each of which A first program-controlled valve (03), a diaphragm compressor (04), and a second program-controlled valve (07) are sequentially connected to the main pipeline (02); the rear end of each main pipeline (02) is connected to a sub-pipeline (13 ), the third program-controlled valve (11) is connected to the sub-pipeline (13), and each sub-pipeline (13) is connected to a high-pressure hydrogen hydrogenation column (12); adjacent two main pipelines ( 02) is connected with a through pipe (08), and the connection point between the through pipe (08) and the main pipeline (02) is located at the second programmable valve (07) and the third programmable valve (11) between; the through pipe (08) is connected with a flow control valve (09). 3. A high-pressure hydrogen filling system according to claim 1 or 2, characterized in that the diaphragm compressor (04) is connected with an on-off control valve (05), and the on-off control valve (05) Connect with both ends of the diaphragm compressor (04). 4. A high-pressure hydrogen filling system according to claim 2, characterized in that, the high-pressure hydrogen hydrogenation column (12) is provided with a flow detection unit and a temperature detection unit, and the flow control valve (09) It is connected with the flow detection unit and the temperature detection unit in the high-pressure hydrogen hydrogenation column (12) through control cables. 5. A high-pressure hydrogen filling system according to claim 1 or 2, characterized in that a pressure control structure is connected between the main pipeline (02) and the graded low-pressure hydrogen surge tank (01). 6. A high-pressure hydrogen filling system according to claim 5, characterized in that the pressure control structure includes a tank connected between the main pipeline (02) and the graded low-pressure hydrogen surge tank (01). The branch pipeline (06), the connection point between the branch pipeline (06) and the main pipeline (02) is located between the second program-controlled valve (07) and the third program-controlled valve (11), the The branch pipeline (06) is connected with a pressure protection valve (10).

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