CN217057176U - Hydrogen-containing natural gas pipeline leakage monitoring and positioning system - Google Patents
Hydrogen-containing natural gas pipeline leakage monitoring and positioning system Download PDFInfo
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- CN217057176U CN217057176U CN202120938516.6U CN202120938516U CN217057176U CN 217057176 U CN217057176 U CN 217057176U CN 202120938516 U CN202120938516 U CN 202120938516U CN 217057176 U CN217057176 U CN 217057176U
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Abstract
The utility model belongs to the technical field of gas pipeline leakage monitoring, a contain hydrogen natural gas line leakage monitoring positioning system is related to, include: the device comprises a detection pipe, a monitoring station and a data analysis station, wherein the detection pipe is arranged on the outer wall of a hydrogen-containing natural gas pipeline along the radial direction of the hydrogen-containing natural gas pipeline and is used for detecting the concentration of the hydrogen-containing natural gas; the monitoring station is used for alarming when the gas concentration monitored by the detection tube is higher than a threshold value; the data analysis station is connected with the monitoring station; wherein, the detection tube is a composite tube with more than two layers with good selective permeability to methane and hydrogen. The problem that above-mentioned prior art exists can be solved to it, can satisfy the requirement that hydrogen-containing natural gas line leakage monitoring sensitivity is high, positioning accuracy is accurate, the rate of missing reporting is low, the rate of misreporting is low.
Description
Technical Field
The utility model relates to a contain hydrogen natural gas line leakage monitoring positioning system belongs to gas pipeline leakage monitoring technical field.
Background
The hydrogen is an important direction for low-carbon clean development of energy, hydrogen transportation is a key link of a hydrogen energy industrial chain, and hydrogen is directly mixed into the conventional natural gas pipeline to form hydrogen-containing natural gas transportation. However, since hydrogen has the characteristics of low density, easy diffusion, flammability, explosiveness and the like, and has a degradation effect on metal materials, the presence of hydrogen increases the risk of pipeline transportation of natural gas containing hydrogen, and once leakage occurs, huge casualties and economic losses can be caused. The hydrogen-containing natural gas pipeline technology is still in research and trial operation stages, and in order to accelerate the rapid development of the hydrogen-containing natural gas pipeline conveying technology and improve the safety and risk control of the hydrogen-containing natural gas pipeline conveying, the pipeline leakage monitoring technology can be adopted to realize the safe operation monitoring of the pipeline, and when the pipeline has small leakage, the pipeline can give an alarm in time and locate the leakage point. The method wins precious maintenance time for the pipeline operation manager, and avoids leakage accidents.
At present, natural gas pipeline leakage monitoring uses a plurality of technical means such as infrasonic waves, optical fibers and the like, but the monitoring methods are indirect detection methods such as sound, light, heat and the like, are easy to cause false alarm due to external signal interference, and have low sensitivity for micro leakage detection. In view of the particularity of the hydrogen-containing natural gas pipeline transmission medium, the accident consequence caused by leakage far exceeds that of the natural gas pipeline, so that the hydrogen-containing natural gas pipeline has higher requirements on the sensitivity, the positioning precision, the false alarm rate and the missing alarm rate of a leakage monitoring system.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims at providing a contain hydrogen natural gas line leakage monitoring positioning system, its problem that can solve above-mentioned prior art exists can satisfy contain hydrogen natural gas line leakage monitoring sensitivity height, positioning accuracy is accurate, the rate of missing reporting is low, the requirement that the wrong report rate is low.
In order to achieve the purpose, the utility model adopts the following technical proposal: a hydrogen-containing natural gas pipeline leakage monitoring and positioning system comprises: the system comprises at least two detection pipes, a carrier gas power module, a monitoring station and a data analysis station, wherein the at least two detection pipes are used for detecting the concentration of leakage gas leaked from a hydrogen-containing natural gas pipeline; the carrier gas power module is used for introducing carrier gas into the detection tube and driving the leakage gas to enter the monitoring station through the carrier gas; the monitoring station is used for monitoring the concentration of leaked gas in the gas entering the monitoring station from the monitoring pipe and giving an alarm when the concentration of the leaked gas exceeds a threshold value; and the data analysis station is connected with the monitoring station.
Further, the detection tube is a composite tube having two or more layers having good selective permeability for methane and hydrogen.
Further, at least two detection pipes are arranged along the direction parallel to the axis of the hydrogen-containing natural gas pipeline.
Further, the detection pipe laying position comprises but is not limited to a position right above, at the left side or at the middle position at the right side of the pipeline, and the distance from the pipeline is not more than 50 cm.
Furthermore, the diameter of the detection tube is 10-50 mm.
Furthermore, the monitoring stations comprise a first monitoring station and a second monitoring station, the first monitoring station is connected with one detection pipe, the second monitoring station is connected with the other detection pipe, and the two monitoring stations are connected with the data analysis station.
Further, the data analysis station determines the position of the leakage point by adopting a flow rate and time integral positioning algorithm.
Furthermore, a filtering dryer is arranged between the detection pipe and the monitoring station and used for filtering impurities in the gas of the detection pipe.
Further, the carrier gas power module comprises a carrier gas cylinder, a calibration gas cylinder and a power device, and the carrier gas cylinder and the calibration gas cylinder are both connected with the power device.
The utility model discloses owing to take above technical scheme, it has following advantage:
1. the utility model discloses can satisfy the requirement that hydrogen-containing natural gas line leakage monitoring sensitivity is high, positioning accuracy is accurate, the rate of missing reporting is low, the wrong report rate is low.
2. The utility model discloses can realize the leakage monitoring of the same time difference of hydrogenous natural gas line, even under the condition that has methane or hydrogen in laying the environment, system performance is good, detectable to hydrogenous natural gas line multiple spot position the small leakage that takes place simultaneously, many times fix a position can be more accurate confirm leak spot position.
3. The utility model discloses a two-way many test tubes lay the method, can realize the continuous many times monitoring of system, reduce the wrong report or miss the newspaper, improve system stability, have system failure self-checking function.
4. The utility model discloses the problem that leads to entire system to become invalid when having stopped one of them detecting tube inefficacy to realize system's inefficacy problem self-checking.
Drawings
Fig. 1 is a schematic diagram of a hydrogen-containing natural gas pipeline leakage monitoring and positioning system in the embodiment.
Detailed Description
The present invention is described in detail by way of specific embodiments in order to enable those skilled in the art to better understand the technical direction of the present invention. It should be understood, however, that the detailed description is provided for a better understanding of the invention only, and they should not be construed as limiting the invention. In describing the present invention, it is to be understood that the terminology used is for the purpose of description only and is not intended to be interpreted as indicating or implying any relative importance.
The utility model provides a contain hydrogen natural gas line leakage monitoring positioning system through adopting two osmotic membrane leak testing sensors, combines methane and hydrogen sampling detection and data analysis system terminal, realizes containing hydrogen natural gas line 1's real-time online leak testing. The scheme of the invention is explained in detail by embodiments in the following with the attached drawings.
The embodiment discloses hydrogen-containing natural gas pipeline leakage monitoring positioning system, as shown in fig. 1, includes: at least two detection tubes, a carrier gas power module, a monitoring station and a data analysis station,
and the at least two detection pipes are arranged along the direction parallel to the axis of the hydrogen-containing natural gas pipeline 1, laid at the middle position right above, on the left side or on the right side of the hydrogen-containing natural gas pipeline 1, have a distance of no more than 50cm from the hydrogen-containing natural gas pipeline 1 and are used for detecting the concentration of the leaked gas leaked from the hydrogen-containing natural gas pipeline 1. The two detection pipes are named as a first detection pipe 2 and a second detection pipe 3, the first detection pipe 2 is laid right above the hydrogen-containing natural gas pipeline 1, and the second detection pipe 3 is laid at the left middle position of the hydrogen-containing natural gas pipeline 1. The installation position of the detection pipe is only a preferable position in the present embodiment, and the detection pipe may be installed at another position as long as the leakage detection of the entire hydrogen-containing natural gas pipeline 1 can be performed. The detection tube is a composite tube with more than two layers of good selective permeability for methane and hydrogen, and the diameter range of the detection tube is 10-50 mm.
The carrier gas power module comprises a carrier gas cylinder, a calibration gas cylinder and a power device, the carrier gas cylinder and the calibration gas cylinder are both connected with the power device, in a common detection mode, gas in the carrier gas cylinder is introduced into the first detection tube 2 or the second detection tube 3 through the power device, and leaked gas is driven to enter the monitoring station through the carrier gas; when the detection tube is calibrated, the power device mixes the carrier gas and the calibration gas in the carrier gas cylinder and the calibration gas cylinder, and the mixed gas is introduced into the first detection tube 2 or the second detection tube 3.
The monitoring station is used for monitoring the concentration of leaked gas in gas entering the monitoring station from the monitoring pipe and giving an alarm when the concentration of the leaked gas exceeds a threshold value; and the data analysis station is used for receiving the information obtained by the first monitoring station and the second monitoring station and calculating the leakage point of the hydrogen-containing natural gas pipeline 1 when the concentration of the leaked gas is higher than a threshold value.
In this embodiment, the monitoring station includes first monitoring station and second monitoring station, and first monitoring station is connected as first detection tube 2 with a detection tube, and the second monitoring station is connected as second detection tube 3 with another detection tube, and two monitoring stations all are connected with the data analysis station. And the data analysis station determines the position of the leakage point by adopting a flow rate and time integral positioning algorithm.
And a filtering dryer is arranged between the detection pipe and the monitoring station and used for filtering impurities in the gas of the detection pipe.
The operation method of the leakage monitoring and positioning system for the hydrogen-containing natural gas pipeline 1 in the embodiment is as follows:
laying at least two detection pipes along the hydrogen-containing natural gas pipeline 1, wherein when the hydrogen-containing natural gas pipeline 1 leaks, the position of the leakage point is generally positioned below the hydrogen-containing natural gas pipeline 1, and leaked gas enters a first detection pipe 2 and a second detection pipe 3; after a preset time interval (such as two hours or more), the carrier gas power module is started, carrier gas is introduced into the first detection pipe 2, leakage gas in the detection pipe enters the first monitoring station along with the carrier gas, the first monitoring station judges whether the concentration of the leakage gas exceeds a threshold range, the concentration of the leakage gas is transmitted to the data analysis station, and the data analysis station calculates the leakage position in the hydrogen-containing natural gas pipeline 1. Then, the carrier gas power module is started again, carrier gas is introduced into the second detection tube 3, the leakage gas in the second detection tube 3 enters a second monitoring station along with the carrier gas, the second monitoring station judges whether the concentration of the leakage gas exceeds a threshold range, and the data analysis station calculates the leakage position in the hydrogen-containing natural gas pipeline 1; and obtaining final leakage gas concentration and leakage positions according to the leakage gas concentration and the leakage positions obtained for the first time and the second time.
The system in the embodiment is provided with double power equipment, so that a single system is ensured to have a longer monitoring distance which can reach at least 40km, and for a plurality of branch pipelines, equipment such as one end monitoring station, power equipment, a gas carrying bottle group and the like can be shared, so that the investment cost is saved. The system in the embodiment can realize the leakage monitoring of the hydrogen-containing pipeline at different points at the same time, and the system performance is good even under the condition that methane or hydrogen exists in the laying environment. The method adopts a bidirectional multi-detection pipe laying method, improves the system stability and has a system failure self-checking function.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as being covered by the claims. The above disclosure is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application should be defined by the claims.
Claims (8)
1. A hydrogen-containing natural gas pipeline leakage monitoring and positioning system is characterized by comprising: at least two detection tubes, a carrier gas power module, a monitoring station and a data analysis station,
the at least two detection pipes are used for detecting the concentration of leakage gas leaked from the hydrogen-containing natural gas pipeline;
the carrier gas power module is used for introducing carrier gas into the first detection tube or the second detection tube and driving the leakage gas to enter the monitoring station through the carrier gas;
the monitoring station is used for monitoring the concentration of leaking gas in the gas that gets into from the monitoring pipe monitoring station, and carry out the police dispatch newspaper when the concentration of leaking gas surpasses the threshold value, the monitoring station includes first monitoring station and second monitoring station, and first monitoring station is connected with a detecting tube, and second monitoring station is connected with another detecting tube, two monitoring stations all with the data analysis station is connected.
2. The hydrogen-containing natural gas pipeline leakage monitoring and locating system of claim 1, wherein the detection pipe is a composite pipe having two or more layers with good permselectivity for methane and hydrogen.
3. The hydrogen-containing natural gas pipeline leakage monitoring and locating system of claim 1, wherein the at least two detection tubes are each disposed in a direction parallel to an axis of the hydrogen-containing natural gas pipeline.
4. The system for monitoring and locating leakage of natural gas pipeline containing hydrogen according to claim 3, wherein the detection pipe is laid right above, at the middle position of the left side or the right side of the pipeline, and the distance from the detection pipe to the pipeline is not more than 50 cm.
5. The system for monitoring and locating the leakage of the natural gas pipeline containing hydrogen according to claim 4, wherein the diameter of the detection pipe is 10-50 mm.
6. The hydrogen-containing natural gas pipeline leak monitoring and locating system of claim 1, wherein the data analysis station employs a flow rate and time integration location algorithm to determine the location of the leak site.
7. The system for monitoring and locating the leakage of a natural gas pipeline containing hydrogen of claim 1, wherein a filter drier is arranged between the detection pipe and the monitoring station and is used for filtering impurities in gas of the detection pipe.
8. The system for monitoring and locating the leakage of a natural gas pipeline containing hydrogen of claim 1, wherein the carrier gas power module comprises a carrier gas cylinder, a calibration gas cylinder and a power device, and the carrier gas cylinder and the calibration gas cylinder are both connected with the power device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120938516.6U CN217057176U (en) | 2021-04-30 | 2021-04-30 | Hydrogen-containing natural gas pipeline leakage monitoring and positioning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120938516.6U CN217057176U (en) | 2021-04-30 | 2021-04-30 | Hydrogen-containing natural gas pipeline leakage monitoring and positioning system |
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| CN217057176U true CN217057176U (en) | 2022-07-26 |
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| CN202120938516.6U Active CN217057176U (en) | 2021-04-30 | 2021-04-30 | Hydrogen-containing natural gas pipeline leakage monitoring and positioning system |
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