WO2022257477A1

WO2022257477A1 - Experimental system and method for medium-low-pressure hydrogen-containing pipeline

Info

Publication number: WO2022257477A1
Application number: PCT/CN2022/073274
Authority: WO
Inventors: 刘翠伟; 李玉星; 宇波; 李敬法; 韩辉; 杨宏超; 崔兆雪; 裴业斌; 艾丽纳; 张慧敏
Original assignee: 中国石油大学(华东)
Priority date: 2021-06-11
Filing date: 2022-01-21
Publication date: 2022-12-15
Also published as: CN113341060A

Abstract

An experimental system and method for a medium-low-pressure hydrogen-containing pipeline, which can more efficiently perform mixing, flow and utilization experiments for a pure hydrogen pipeline and a hydrogen-doped pipeline. The system comprises a mixing device, a medium-low-pressure test pipeline, a control terminal, and a terminal test element connected to the control terminal, wherein the mixing device comprises a plurality of input ports; at least one first input port is in communication with a hydrogen source; at least one second input port is in communication with a non-hydrogen source; an output port of the mixing device is in communication with the terminal test element by means of the medium-low-pressure test pipeline, and is provided with a hydrogen concentration measurement element connected to the control terminal; the medium-low-pressure test pipeline is connected to at least one sensing element connected to the control terminal; and the control terminal controls the pressure and/or flow of the mixing device and the outlet pressure and/or flow of each gas source according to a hydrogen concentration measurement result.

Description

A medium and low pressure hydrogen-containing pipeline experiment system and method

technical field

The present disclosure relates to the technical field of hydrogen energy utilization, in particular to a medium and low pressure hydrogen-containing pipeline experiment system and method.

Background technique

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Due to its wide range of sources, clean and low-carbon, high efficiency and flexibility, hydrogen plays a key role in promoting global energy transformation and realizing green and sustainable development. Hydrogen transportation is an important part of hydrogen energy utilization, and its long-distance transportation has attracted extensive attention. At present, hydrogen is mainly transported by high-pressure hydrogen cylinder long-tube trailers, liquid hydrogen tank trucks, and liquid hydrogen barges. However, these methods have high storage and transportation costs and low efficiency, and it is difficult to solve the problem of long-distance, large-scale, and low-cost transportation of hydrogen. Therefore, under the condition that the current hydrogen transmission and distribution infrastructure is not perfect, mixing hydrogen into natural gas in a certain proportion, using the existing natural gas pipeline network to mix hydrogen or transport pure hydrogen is a feasible way to transition to hydrogen energy. In recent years, many domestic and foreign scholars have been studying how to use the existing natural gas pipeline network to transport hydrogen in order to reduce greenhouse gas emissions and improve the efficiency of hydrogen transport. According to the survey, at present, domestic and foreign patents related to hydrogen pipeline transportation process mainly include:

The inventor found that most of the existing patents for the production, storage and utilization of hydrogen use hydrogen production equipment to generate hydrogen, and the research on hydrogen-containing pipeline transportation technology lacks an experimental platform and system, and it is impossible to realize the mixed transmission experiment of hydrogen and non-hydrogen gas. The air supply pressure and air supply volume cannot be adjusted according to the detection results at the transmission end.

Contents of the invention

In order to solve the deficiencies of the prior art, the present disclosure provides a medium and low pressure hydrogen-containing pipeline experiment system and method, which realize more efficient experiments of the mixing, flow and utilization of pure hydrogen pipelines and hydrogen-doped pipelines.

In order to achieve the above purpose, the present disclosure adopts the following technical solutions:

The first aspect of the present disclosure provides a medium-low pressure hydrogen-containing pipeline experiment system.

A medium-low pressure hydrogen-containing pipeline experimental system, including: a blending device, a medium-low pressure test pipeline, a control terminal, and a terminal test element connected to the control terminal;

The blending device includes a plurality of input ports, at least one first input port communicates with a hydrogen source, at least one second input port communicates with a non-hydrogen source, and the output port of the blending device communicates with a terminal test element through a medium-low pressure test pipeline;

The output port of the mixing device is equipped with a hydrogen concentration detection element connected to the control terminal, and the medium and low pressure test pipeline is connected with at least one sensing element connected to the control terminal. The control terminal measures the outlet pressure of each gas source according to the hydrogen concentration detection results. and/or flow control.

Further, the sensing element includes at least a flow meter, a pressure sensor and a temperature sensor.

Further, the medium and low pressure test pipelines are laid in pipe trenches, and the top of the pipe trenches is open or a concrete slab with pressure relief holes is placed.

Further, a vent valve is set at the end of the medium and low pressure test pipeline.

Further, the terminal test components include at least a flame concentration detector, a high-speed camera, a combustion product analyzer and a heat radiation meter.

Further, the middle and low pressure test pipelines are steel pipes or non-metallic pipes.

Further, the non-hydrogen source includes natural gas at least, and the output port of the natural gas tank communicates with the second input port.

Further, the non-hydrogen source also includes nitrogen or carbon dioxide or carbon monoxide, and the output port of the non-hydrogen source tank communicates with the second input port.

The second aspect of the present disclosure provides a medium-low pressure hydrogen-containing pipeline experimental method, using the medium-low pressure hydrogen-containing pipeline experimental system described in the first aspect of the present disclosure, including the following process:

The control terminal issues gas instructions to the hydrogen source storage device and the non-hydrogen source storage device;

Hydrogen and non-hydrogen gas are fed into the blending device, and the control terminal controls the outlet pressure and/or flow rate of each gas source according to the detection results of the hydrogen concentration of the blending device, so that the hydrogen concentration in the mixed gas output by the blending device is within a preset value. within range.

Further, the control terminal controls the outlet pressure and/or flow rate of each gas source according to the results monitored by the terminal test element, so as to realize the composition matching control of various gases.

Compared with the prior art, the beneficial effects of the present disclosure are:

1. In the middle and low pressure hydrogen-containing pipeline experimental system and method described in this disclosure, the control terminal controls the outlet pressure and/or flow rate of each gas source according to the hydrogen concentration detection results of the blending device, and realizes the integration of pure hydrogen pipelines and hydrogen-doped pipelines. More efficient experiments in blending, flow and utilization.

2. In the middle and low pressure hydrogen-containing pipeline experimental system and method described in the present disclosure, the control terminal controls the outlet pressure and/or flow rate of each gas source according to the results monitored by the terminal test components, and can realize the component matching control of various gases experiment.

Description of drawings

The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure, and the exemplary embodiments and descriptions of the present disclosure are used to explain the present disclosure, and do not constitute improper limitations to the present disclosure.

FIG. 1 is a schematic structural diagram of a medium-low pressure hydrogen-containing pipeline experimental system provided in Example 1 of the present disclosure.

Detailed ways

The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

In the case of no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

Example 1:

As shown in Figure 1, Embodiment 1 of the present disclosure provides a medium and low pressure hydrogen-containing pipeline experiment platform and system, including four parts:

The first part, hydrogen production, purification and storage;

The second part, the mixing device of hydrogen and other gases;

The third part is the medium and low pressure pipeline transportation part;

The fourth part is the terminal utilization combustion part.

In the first part, the hydrogen produced by electrolysis of water undergoes multi-stage separation and purification, and its hydrogen concentration reaches 99.999%. The purified hydrogen enters the gas storage bottle, and the gas storage bottle is under 8MPa.

In the second part, the mixing device of hydrogen and other gases, the gas component detection device is installed at the output port of the mixing device, and PLC is integrated on the detection device, mixing device, hydrogen gas storage cylinder and other gas storage cylinders Control System;

It can be understood that, in some other embodiments, corresponding electric valves are provided at each input port and each output port of the blending device, and the pressure and flow control of the electric valves are performed through the PCL control system.

Using the PLC control system, the concentration detected by the detection device is fed back to the blending device to control the pressure and flow of the blending device, and further fed back to the hydrogen gas storage cylinder and other gas storage cylinders to control the outlet pressure and flow of the gas storage cylinder. Control the hydrogen concentration of the blended gas after the blending device.

In the third part, flow meters, pressure sensors, and temperature sensors are installed in the medium and low pressure pipeline transportation part to sense the flow parameters in the pipe. Open or place a concrete slab with a pressure relief hole above the ditch, set a vent valve at the end of the pipe, and adopt a sealed connection between the pipes.

It can be understood that, in some other implementation manners, the depth and width of the trench can be selected according to specific actual working conditions, which will not be repeated here.

In the third part, the medium and low pressure pipeline transportation part includes two sets of systems, one uses steel pipes and the other uses non-metallic pipes. Other parts are the same, and the two systems can realize the integration of steel pipes and non-metallic pipes. Experiments have achieved a more comprehensive hydrogen transport experiment.

In the fourth part, the combustion part of the terminal is equipped with a flame concentration detector, a high-speed camera, a combustion product analyzer, a heat radiation meter, etc.

Before the experiment starts, the entire medium and low-pressure pipeline transportation system must be purged through a nitrogen cylinder, and the pressure of the pipeline should be maintained to test the tightness of the pipeline. If the tightness of the pipeline does not meet the requirements, epoxy resin sleeves should be used for pipeline repair.

The experimental system can complete the research on gas mixing, gas flow, and gas combustion utilization laws in medium and low pressure hydrogen-containing pipelines.

The experimental system can complete the mixing, flow and utilization experiments of pure hydrogen pipelines, hydrogen-doped pipelines, hydrogen and carbon dioxide pipelines, and hydrogen and carbon monoxide pipelines.

Example 2:

Embodiment 2 of the present disclosure provides a medium-low pressure hydrogen-containing pipeline experimental method, using the medium-low pressure hydrogen-containing pipeline experimental system described in Embodiment 1 of the present disclosure, including the following process:

The control terminal controls the outlet pressure and/or flow rate of each gas source according to the results monitored by the terminal test components, so as to realize the composition matching control of various gases. The best gas combination can be found through the composition matching control, and then realize More stable and efficient hydrogen transport.

Those skilled in the art should understand that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Accordingly, the present disclosure may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) having computer-usable program code embodied therein.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random AccessMemory, RAM), etc.

The above descriptions are only preferred embodiments of the present disclosure, and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

A medium and low pressure hydrogen-containing pipeline experimental system, characterized in that:

Including: blending device, medium and low pressure test pipeline, control terminal and terminal test components connected to the control terminal;

The blending device includes a plurality of input ports, at least one first input port communicates with a hydrogen source, at least one second input port communicates with a non-hydrogen source, and the output port of the blending device communicates with a terminal test element through a medium-low pressure test pipeline;

The output port of the blending device is provided with a hydrogen concentration detection element connected to the control terminal, and the medium and low pressure test pipeline is connected with at least one sensing element connected to the control terminal, and the control terminal calculates the pressure and and/or flow control and outlet pressure and/or flow control of each air source.
The medium and low pressure hydrogen-containing pipeline experimental system according to claim 1, characterized in that:

The sensing element includes at least a flow meter, a pressure sensor and a temperature sensor.
The medium and low pressure hydrogen-containing pipeline experimental system according to claim 1, characterized in that:

The medium and low pressure test pipelines are laid in the pipe trench, and the top of the pipe trench is open or a concrete slab with pressure relief holes is placed.
The medium and low pressure hydrogen-containing pipeline experimental system according to claim 1, characterized in that:

A vent valve is installed at the end of the medium and low pressure test pipeline.
The medium and low pressure hydrogen-containing pipeline experimental system according to claim 1, characterized in that:

Terminal test components include at least a flame concentration detector, a high-speed camera, a combustion product analyzer and a heat radiation meter.
The medium and low pressure hydrogen-containing pipeline experimental system according to claim 1, characterized in that:

The medium and low pressure test pipes are steel pipes or non-metallic pipes.
The medium and low pressure hydrogen-containing pipeline experimental system according to claim 1, characterized in that:

The source of non-hydrogen gas includes at least natural gas, and the output port of the natural gas tank communicates with the second input port.
The medium and low pressure hydrogen-containing pipeline experimental system according to claim 1, characterized in that:

The non-hydrogen source also includes nitrogen or carbon dioxide or carbon monoxide, and the output port of the non-hydrogen source tank communicates with the second input port.
An experimental method for a medium-low pressure hydrogen-containing pipeline, characterized in that: using the medium-low pressure hydrogen-containing pipeline experimental system described in any one of claims 1-8, comprising the following process:

The control terminal issues gas instructions to the hydrogen source storage device and the non-hydrogen source storage device;

Hydrogen and non-hydrogen gas are introduced into the blending device, and the control terminal performs pressure and/or flow control of the blending device and outlet pressure and/or flow control of each gas source according to the hydrogen concentration detection results, so that the output of the blending device The hydrogen concentration in the mixed gas is within the preset range.
The medium and low pressure hydrogen-containing pipeline experiment method as claimed in claim 9, characterized in that:

The control terminal controls the outlet pressure and/or flow rate of each gas source according to the results monitored by the terminal test elements, so as to realize the composition matching control of various gases.