CN215981981U

CN215981981U - Hydrogen discharge system

Info

Publication number: CN215981981U
Application number: CN202121894923.8U
Authority: CN
Inventors: 周亮; 李明昕; 贾艳明; 黄景龙
Original assignee: Zhengxing Hydrogen Electric Technology Zhengzhou Co ltd
Current assignee: Zhengxing Hydrogen Electric Technology Zhengzhou Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-03-08
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a hydrogen discharging system, which comprises a hydrogen discharging main path, wherein the hydrogen discharging main path is sequentially connected with a breaking valve, a pressure gauge, a one-way valve, an inlet stop valve, a filter, an outlet stop valve and a pneumatic valve; the hydrogen station gas unloading system pipeline further comprises a nitrogen purging branch, a diffusing branch, an instrument air inlet and a triple piece, wherein the nitrogen purging branch is arranged on the hydrogen discharging main path between the breaking valve and the one-way valve, the diffusing branch is arranged on the hydrogen discharging main path between the one-way valve and the inlet stop valve, and the triple piece is fixedly connected to the instrument air inlet. The system has the advantages of reasonable structure, simple and convenient operation and use, intellectualization and high automation degree.

Description

Hydrogen discharge system

Technical Field

The utility model relates to the technical field of gas discharging of a hydrogenation station, in particular to a hydrogen discharging system.

Background

With the increase of the population base of human beings and the continuous development of scientific technology, the problems of the continuous consumption of non-renewable resources such as fossil fuel, coal, natural gas and the like and the pollution of natural environment are aggravated day by day. The exploration and development of a sustainable, clean energy technology is an urgent need to meet the development of human society, and is one of the hottest and most challenging topics worldwide nowadays. The hydrogen energy is an extremely abundant, inexhaustible and inexhaustible energy which can be developed nowadays. Hydrogen is an ideal clean energy carrier, which is recognized by the world and is the most promising new clean energy for people in the 21 st century, and the development and application of hydrogen energy are greatly enthusiastic and hopeful, so that various devices such as a hydrogen station, a hydrogen energy automobile, a hydrogen fuel cell and the like, and derived products are produced.

As a green and environment-friendly energy source, hydrogen is being vigorously developed in China to serve as a hydrogen refueling station, and a gas discharging column is important equipment for delivering and using the hydrogen refueling station. After the hydrogen is filled and transported to the hydrogen station from the hydrogen production station by the pipe transport vehicle, the high-pressure hydrogen in the pipe transport vehicle needs to be discharged into the hydrogen storage tank of the hydrogen station by using the gas discharge column, and the gas discharge column plays the role of hydrogen discharge equipment at the moment. The gas unloading process comprises the following steps: one end of the air discharging column is connected with the pipe conveying vehicle through an air discharging hose, and the other end of the air discharging column is connected with the compressor sledge or the sequence control panel through the clamping sleeve adapter. High-pressure hydrogen in the tube bundle vehicle flows through an air discharge hose and enters an air discharge column, and the high-pressure hydrogen sequentially flows through tube valve members such as a breaking valve, a one-way valve, an inlet stop valve, a filter, an outlet stop valve and the like to form a pipeline system, and then is discharged into a compressor sledge or a sequence control panel to complete one air discharge metering process.

In the related technology, manual valves in hydrogen unloading system pipelines of the gas unloading column are numerous, the operation process is complicated, and the operation personnel have higher professional quality and operation experience requirements, so that the working efficiency is low and the safety is poor.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.

Disclosure of Invention

The utility model aims to provide a hydrogen discharging system to solve the technical problems of complex structure and inconvenient operation and use of the existing gas discharging column system.

In order to solve the technical problems, the utility model adopts the following technical scheme:

designing a hydrogen discharging system, which comprises a hydrogen discharging main path, wherein the hydrogen discharging main path is sequentially connected with a breaking valve, a pressure gauge, a one-way valve, an inlet stop valve, a filter, an outlet stop valve and a pneumatic valve; the hydrogen discharging system further comprises a nitrogen purging branch, a diffusing branch, an instrument air inlet and a triple piece, wherein the nitrogen purging branch is arranged on the hydrogen discharging main path between the breaking valve and the one-way valve, the diffusing branch is arranged on the hydrogen discharging main path between the one-way valve and the inlet stop valve, and the triple piece is fixedly connected to the instrument air inlet.

Preferably, the hydrogen discharge main circuit, the nitrogen purging branch circuit and the diffusing branch circuit are respectively provided with a pneumatic valve.

Preferably, a bypass branch is arranged on the pipeline at the joint of the pneumatic valve, and stop valves are respectively arranged on the bypass branches.

Preferably, the triple piece is respectively connected with the pneumatic valve through the instrument wind execution pipeline, and electromagnetic valves are arranged between the triple piece and the pneumatic valve.

Preferably, two pressure transmitters are arranged on the nitrogen purging branch.

Preferably, the hydrogen discharge system further comprises a pressure overload protection branch and a sampling branch; the pressure overload protection branch is arranged on the hydrogen discharging main path between the filter and the outlet stop valve, and the sampling branch is arranged on the nitrogen purging branch.

Preferably, the pressure overload protection branch comprises a safety valve and a one-way valve, the inlet end of the safety valve is communicated with the hydrogen discharge main circuit through a pipeline, and the outlet end of the safety valve is communicated with the one-way valve through a pipeline.

Preferably, the sampling branch comprises a stop valve and a sampling port connecting joint; one end of the stop valve is communicated with the nitrogen purging branch pipeline through a pipeline, and the other end of the stop valve is connected with the sampling container through the sampling port connecting joint.

Compared with the prior art, the utility model has the main beneficial technical effects that:

1. the system has the advantages of reasonable pipeline structure, simple operation process, no need of professional operation training for operators and good universality.

2. The utility model can ensure the operation safety and improve the working efficiency and the production efficiency.

Drawings

Fig. 1 is a schematic diagram of the gas circuit of the present invention.

FIG. 2 is a schematic view of a hydrogen discharge system according to the present invention.

In the above drawings, 1 is a main hydrogen discharge path 1, 11 is a breaking valve, 12 is a pressure gauge, 13 is a first check valve, 14 is an inlet check valve, 15 is a filter, 16 is a flow meter, 17 is an outlet check valve, 18 is a first pneumatic valve, 2 is a nitrogen purge branch, 21 is a second pneumatic valve, 22 is a second check valve, 23 is a pressure transmitter, 3 is a relief branch, 31 is a third pneumatic valve, 32 is a third check valve, 4 is a pressure overload protection branch, 41 is a safety valve, 5 is a sampling branch, 51 is a manual check valve, 52 is a sampling connection joint, 6 is an instrument air inlet, 7 is a pneumatic triple, 8 is an electromagnetic valve, 81 is a first electromagnetic valve, 82 is a second electromagnetic valve, and 83 is a third electromagnetic valve.

Detailed Description

The following examples are intended to illustrate the present invention in detail and should not be construed as limiting the scope of the present invention in any way.

In the description of the technical solutions of the present invention, it should be understood that the orientations or positional relationships indicated as referring to the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Reference herein to "first," "second," etc., is used to distinguish between similar items and not to limit the particular order or sequence.

Example 1: a hydrogen discharge system, as shown in figure 1, comprises a main hydrogen discharge path 1, a nitrogen purging branch 2, a discharging branch 3, a pressure overload protection branch 4 and a sampling branch 5, wherein each branch is sequentially communicated with the main hydrogen discharge path 1 through a pipeline.

The hydrogen discharge main path 1 is sequentially connected with a breaking valve 11, a pressure gauge 12, a first one-way valve 13, an inlet stop valve 14, a filter 15, a flowmeter 16, an outlet stop valve 17 and a first pneumatic valve 18 from a hydrogen inlet to a hydrogen outlet; the snapping valve 11 is arranged between the hydrogen unloading inlet and the gas unloading equipment, a bidirectional check valve is arranged in the snapping valve, once the filling gun is pulled by a certain external force, the snapping valve 11 can be automatically broken, and meanwhile, a pipeline is automatically closed and cut off, so that dangerous accidents are avoided; the first check valve 13 prevents dangerous situations such as reverse flow, reverse conduction, large hydrogen leakage and the like when high-pressure gas (hydrogen/nitrogen) works; the pressure gauge 12 is a high-precision oil-forbidden pressure gauge, the measuring range is 0-100MPa, the precision grade is plus or minus 0.1%, the filter 15 blocks particle impurities and dirt mixed in hydrogen, and discharges clean hydrogen, so that clean hydrogen is provided for the hydrogen energy valve comprehensive testing device, and normal work and operation of pipe valves of a pipeline system are protected; the flow meter 16 can realize the real-time acquisition, processing and calculation of parameter information of hydrogen, such as flow, temperature, density and the like, so as to obtain the mass of hydrogen flowing through the flow meter 16; the first pneumatic valve 18 is a switching action of a double-acting cylinder, is driven to be executed by an execution air source, and is correspondingly matched with a first electromagnetic valve to control the opening and closing of the valve.

The nitrogen purging branch 2 is arranged on the hydrogen discharging main circuit 1 between the breaking valve 11 and the first one-way valve 13 and comprises a second pneumatic valve 21, a second one-way valve 22 and two pressure transmitters 23, preferably, the two pressure transmitters 23 are arranged to ensure that when one pressure transmitter 23 fails, the other pressure transmitter can quickly replace the function of the other pressure transmitter, and the whole hydrogen discharging process cannot be influenced. The bleeding branch 3 is provided in the hydrogen gas discharge main path 1 between the first check valve 13 and the inlet shutoff valve 14, and includes a third air-operated valve 31 and a third check valve 32.

The pressure overload protection branch 4 is arranged on the hydrogen gas discharge main path 1 between the filter 15 and the outlet stop valve 17, and mainly comprises a safety valve 41, the safety valve 41 is communicated with the hydrogen gas discharge main path through one end of a pipeline, the other end of the safety valve is communicated with the third one-way valve 31 through a pipeline, pressure is relieved through a discharge port of the discharge branch 3, when the pressure in the hydrogen gas discharge main path 1 is greater than or equal to the pressure value set by the safety valve, the valve 41 is automatically opened, high-pressure gas in the pipeline is discharged to the concentrated discharge pipeline through the third one-way valve 31, and when the pressure in the hydrogen gas discharge main path 1 is less than the pressure value set by the safety valve 41, the valve 41 is automatically closed.

The sampling branch 5 is arranged on the nitrogen purging branch 2 and the hydrogen discharging main path 1 communicating pipeline and comprises a manual stop valve 51 and a sampling connecting joint 52, when the hydrogen discharging main path 1 is filled with high-pressure hydrogen, the manual stop valve is opened, the hydrogen enters a sampling container connected with the sampling connecting joint 52 through the sampling branch 5, and the manual stop valve 51 is closed after sampling is completed. The pipeline connecting parts of the first pneumatic valve 18, the second pneumatic valve 21 and the third pneumatic valve 31 are provided with bypass branches, the bypass branches are provided with manual stop valves, and the manual stop valves are manually opened or closed to ensure the normal operation of the hydrogen unloading process in the state that the pneumatic valves cannot normally work.

The hydrogen gas discharging system pipeline also comprises an instrument air inlet 6, a pneumatic triple piece 7, a main pipeline on-off button (not shown in the figure), a nitrogen purging button (not shown in the figure) and an emergency stop button (not shown in the figure), the pneumatic triplet 7 is fixedly connected to the instrument wind inlet 6, the pneumatic triplet 7 is respectively communicated with the first pneumatic valve 18, the second pneumatic valve 21 and the third pneumatic valve 31 through pipelines, and a first solenoid valve 81 is arranged in a pipeline for communicating the pneumatic triplet 7 with the first pneumatic valve 18, a second solenoid valve 82 is arranged in a pipeline for communicating the pneumatic triplet with the second pneumatic valve 21, a third solenoid valve 83 is arranged in a pipeline for communicating the pneumatic triplet with the third pneumatic valve 31, the solenoid valve 8 is used for controlling the on-off of an instrument wind execution pipeline, thereby controlling the opening and closing of the pneumatic valve, and the pneumatic triple piece 7 respectively provides a clean nitrogen gas source for the execution pipeline for the pneumatic valve. Pressing the main path on-off button (not shown in the figure) opens the first pneumatic valve 18, and then pressing the main path on-off button (not shown in the figure) closes the first pneumatic valve; pressing a nitrogen purging key (not shown in the figure), starting nitrogen purging, and pressing the nitrogen purging key (not shown in the figure) to finish nitrogen purging; when the emergency stop button (not shown) is pressed, the first solenoid valve 81, the second solenoid valve 82, and the third solenoid valve 83 are simultaneously de-energized, thereby controlling the first air-operated valve 18, the second air-operated valve 21, and the third air-operated valve 31 to close.

The operation and use flow of the hydrogen discharge system is as follows:

the hydrogen inlet of the unloading hose is connected with the outlet of the tube bundle vehicle or other equipment, and the hydrogen outlet is connected with the inlet of the sequence control panel or other equipment; the outlet of the nitrogen source pipeline is connected with the nitrogen purging inlet; the diffusing port is connected with a centralized diffusing pipeline; the outlet of the instrument wind air source pipeline is connected with the inlet of the instrument wind, so that the valves of the first pneumatic valve 18 and the bypass branch manual stop valve are all in a closed state.

When a nitrogen purging button (not shown in the figure) is pressed, the nitrogen automatic purging and replacing function is started, when the pressure transmitter 23 monitors that the gas pressure in the pipeline is less than 0.2MPa, the second electromagnetic valve 82 is electrified, and the instrument wind source enters the second pneumatic valve 21 pneumatic actuating mechanism through the pneumatic triple piece 7. The second pneumatic valve is opened, nitrogen flows through the second one-way valve 22 to enter the hydrogen discharge main circuit 1, and then flows through the breaking valve 11 and the hydrogen inlet of the unloading hose; after the second electromagnetic valve 82 is electrified for 5 seconds, the third electromagnetic valve 83 is electrified, an instrument air source enters a pneumatic actuating mechanism of the third pneumatic valve 31 through the pneumatic triple piece 7, the valve of the third pneumatic valve 31 is opened, nitrogen flows through the hydrogen discharge main circuit 1 and the third one-way valve 32 and is discharged into a centralized diffusion pipeline system, at the moment, nitrogen flows to the hydrogen inlet and the diffusion port simultaneously and is discharged, when the electrifying time of the second electromagnetic valve 82 and the third electromagnetic valve 83 is equal to the set time, the second electromagnetic valve and the third electromagnetic valve are powered off, the second electromagnetic valve and the third electromagnetic valve are closed, and the system stops nitrogen purging; the operation is repeated three times, namely the nitrogen purging replacement operation of the air in the pipeline before the whole gas discharge is completed.

Hydrogen enters the inlet end of a hydrogen discharge main pipeline 1 from an unloading outlet, and passes through a breaking valve 11, a pressure gauge 12 (the pressure gauge measures in real time and displays the pressure value of the main pipeline), a pressure transmitter 23 (the pressure transmitters PT101 and PT102 collect pressure data of the main pipeline in real time and transmit the data to a background PLC control system, so that the pressure of the main pipeline can be monitored, recorded and fed back in real time), a first one-way valve 13 flows to an inlet stop valve 14, the inlet stop valve 14 and an outlet stop valve 17 are manually opened in sequence, the hydrogen flows to a first pneumatic valve 18 from the inlet stop valve 14, a filter 15, a flowmeter 16 and the outlet stop valve 17, a main pipeline on-off button (not shown in the figure) is pressed, the first solenoid valve 81 is powered on, an instrument air source flows into a pneumatic actuator of the first pneumatic valve 18 through a pneumatic triplet 7, the valve of the first pneumatic valve 18 is opened, so that the hydrogen of the main pipeline is discharged out of an unloading system, and (4) flowing into the next hydrogenation equipment, and starting gas discharge. Then, a main pipeline on-off button (not shown in the figure) is pressed, the first electromagnetic valve 81 is powered off, the valve of the first pneumatic valve 18 is closed, and air discharge is stopped; when a nitrogen purging key (not shown in the figure) is pressed, the nitrogen automatic purging replacement function is started, the pressure transmitter 23 monitors that the gas pressure in the pipeline is not less than 0.2MPa, the third electromagnetic valve 83 is powered on, the instrument wind gas source flows through the pneumatic triple piece 7 and enters the pneumatic actuating mechanism of the third pneumatic valve 31, the valve of the third pneumatic valve 31 is started, the high-pressure hydrogen in the pipeline is discharged into the centralized releasing pipeline system through the third one-way valve 32, the third electromagnetic valve 83 is powered off automatically when the high-pressure hydrogen pressure in the pipeline is not more than 0.2MPa, the valve of the third pneumatic valve 31 is closed, the high-pressure hydrogen in the pipeline stops releasing, the second electromagnetic valve 82 is powered on, the instrument wind source enters the pneumatic actuating mechanism of the second pneumatic valve 21 through the pneumatic triple piece 7, the valve of the second pneumatic valve 21 is started, and the nitrogen flows through the second one-way valve 22 and enters the pipeline.

When the pressure of nitrogen in the pipeline is equal to 0.8MPa, the third electromagnetic valve 83 is electrified, and the instrument air source enters the third pneumatic valve 31 through the pneumatic triple 7. The third pneumatic valve 31 is opened and nitrogen flows through the third one-way valve 32, the diffusing port and into the centralized diffusing pipeline system.

When the power-on time of the second electromagnetic valve 82 is equal to the set time (10S), the second electromagnetic valve 82 is powered off, the second pneumatic valve 21 is closed, the system stops nitrogen purging, when the pressure of nitrogen in the pipeline is not more than 0.1MPa, the third electromagnetic valve 83 is powered off, the third pneumatic valve 31 is closed, and the system stops nitrogen purging. Repeating the operation for three times, namely finishing the nitrogen purging work after hydrogen discharge;

and manually closing the inlet stop valve 14, the outlet stop valve 17 and the interface of the hydrogen discharging vehicle and the hydrogen discharging main road 1 in sequence, namely completing the gas discharging operation in sequence.

While the utility model has been described in detail with reference to the drawings and examples, it will be understood by those skilled in the art that various changes in the details of the embodiments may be made without departing from the spirit of the utility model, and various changes in the details of construction and materials may be substituted for elements thereof to form various embodiments, which are within the scope of the utility model and are not intended to be limited to the details of the embodiments.

Claims

1. A hydrogen discharge system comprises a hydrogen discharge main path, wherein the hydrogen discharge main path comprises a breaking valve, a pressure gauge, a one-way valve, an inlet stop valve, a filter, an outlet stop valve and a pneumatic valve which are sequentially connected; the hydrogen discharging system is characterized by further comprising a nitrogen purging branch, a bleeding branch, an instrument air inlet and a triple piece, wherein the nitrogen purging branch is arranged in the hydrogen discharging main path between the breaking valve and the one-way valve, the bleeding branch is arranged in the hydrogen discharging main path between the one-way valve and the inlet stop valve, and the triple piece is fixedly connected to the instrument air inlet.

2. The hydrogen discharge system according to claim 1, wherein pneumatic valves are disposed on the main hydrogen discharge path, the nitrogen purge branch path and the discharge branch path.

3. The hydrogen discharge system according to claim 2, wherein a bypass branch is provided on the pipeline at the joint of the pneumatic valve, and a stop valve is provided on each bypass branch.

4. The hydrogen discharge system according to claim 1, wherein the triple parts are respectively connected with the pneumatic valves through the instrument wind execution pipelines, and electromagnetic valves are arranged between the triple parts and the pneumatic valves.

5. The hydrogen discharge system according to claim 1, wherein two pressure transmitters are provided on the nitrogen purge branch.

6. The hydrogen discharge system according to claim 1, further comprising a pressure overload protection branch and a sampling branch; the pressure overload protection branch is arranged in a hydrogen discharge main path between the filter and the outlet stop valve, and the sampling branch is arranged on the nitrogen purging branch.

7. The hydrogen discharge system according to claim 6, wherein said pressure overload protection branch comprises a safety valve and a check valve, an inlet end of said safety valve is connected to said main hydrogen discharge path through a pipeline, and an outlet end of said safety valve is connected to said check valve through a pipeline.

8. The hydrogen discharge system according to claim 6, wherein the sampling branch comprises a stop valve and a sampling port connection fitting; one end of the stop valve is communicated with the nitrogen purging branch pipeline through a pipeline, and the other end of the stop valve is connected with the sampling container through the sampling port connecting joint.