CN110319351A - Pipeline gas micro-leakage continuous monitoring method and device based on detection pipe - Google Patents
Pipeline gas micro-leakage continuous monitoring method and device based on detection pipe Download PDFInfo
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- CN110319351A CN110319351A CN201910649803.2A CN201910649803A CN110319351A CN 110319351 A CN110319351 A CN 110319351A CN 201910649803 A CN201910649803 A CN 201910649803A CN 110319351 A CN110319351 A CN 110319351A
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- solenoid valve
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- filter element
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- 238000001514 detection method Methods 0.000 title claims abstract description 210
- 238000012544 monitoring process Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 123
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000012159 carrier gas Substances 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 25
- 239000007924 injection Substances 0.000 claims abstract description 25
- 239000003345 natural gas Substances 0.000 claims abstract description 25
- 230000000704 physical effect Effects 0.000 claims abstract description 24
- 238000012806 monitoring device Methods 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 230000003204 osmotic effect Effects 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000010606 normalization Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 210000004556 brain Anatomy 0.000 claims 1
- 230000001915 proofreading effect Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 11
- 238000004458 analytical method Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
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- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005183 dynamical system Methods 0.000 description 2
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- 238000012546 transfer Methods 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to a kind of pipeline gas micro-leakage continuous monitoring method and device based on detection pipe, it includes Auto-Sensing Mode, detection pattern, data analytical model, continuous monitoring operation mode and filter replacement mode, and each mode is based on pipeline gas micro-leakage continuous monitoring device and is operated；Device includes the first detection pipe and the second detection pipe being arranged in right above natural gas line, and carrier gas enters the first detection pipe through the first filter element, enters the second detection pipe through the second filter element；The first end of first detection pipe and the second detection pipe is provided with mark gas injection unit；The second end of first detection pipe and the second detection pipe is connect with third filter element, physical property detection unit and vacuum pump one end through the first solenoid valve respectively, and the vacuum pump other end is connect through flow controlling unit with gas analyzer；First solenoid valve, physical property detection unit, vacuum pump, flow controlling unit and gas analyzer are electrically connected with programmable controller.Positioning accuracy of the present invention is high.
Description
Technical field
The present invention relates to a kind of natural gas leaking monitoring technical fields, especially with regard to a kind of defeated day of the pipe based on detection pipe
Right gas micro-leakage continuous monitoring method and device.
Background technique
Natural gas line is always pipeline enterprise operation center of gravity safely.According to statistics, 2010 to 2014, China's pipeline thing
Therefore rate is about 3.0 × 10-3/ (kma) is Canadian 30 times, and 7 times of the U.S., 12 times of European Union, pipe safety situation is tight
It is high.In pipeline accident statistics, be broadly divided into two classes: one kind is safety accident caused by pipe leakage, and one kind is applied for third party
Pipeline damage caused by work.However, being limited to the development of line leakage technology, current existing safety monitoring technology is still deposited
In many defects, such as the sound wave technology of U.S. ASI, although easy for installation, sensitivity is higher, there are certain wrong report feelings
Condition, and mounting cost is higher；Based on mass/volume balancing method, cost is relatively low, but sensitivity is poor, and wrong report is failed to report higher；It is based on
Although the leakage monitoring technology of optical fiber monitors, positioning accuracy is high, the response time is fast, needs excellent filtering algorithm, rate of false alarm
It is higher.The common defect of above-mentioned technology is exactly that cannot carry out effective early warning for the minute leakage of pipeline early stage, and be easy wrong report.
Leakage monitoring technology based on detection pipe is a kind of leakage monitoring technology that can capture micro leakage.By inspection
Capture of the test tube to trace leakage methane, the technology it can be found that pipeline early stage small leakage, by gas pressure, temperature and
Flow velocity positions leakage point, to controlling pipe leakage security risk in earliest period.Due to being to methane gas spy
Reference number is directly measured, and therefore, rate of false alarm is extremely low.It is more that the patent document of Publication No. CN103629533A discloses one kind
A plurality of detection pipe is first pumped by the device and method of item buried natural gas line leakage side by side, the invention using power unit
Negative pressure state analyzes gas station in detection pipe by the Laser emission and receiving unit at the detection pipe both ends that are placed in,
It after noting abnormalities, is aspirated by vacuum pump, will test gas in pipe and extract out, and carry out analyzing and positioning.This method can be realized pair
The monitoring of external world's leakage, but device is excessively complicated, and detection pipe needs are trapped under negative pressure state, and device needs laser detection
Unit is monitored state in detection pipe, expensive.The patent document of Publication No. CN 103629536B discloses one kind
The device and method of natural gas line leakage, this method combine semi-permeable detection pipe to realize naturally by a sensing cable
The monitoring of feed channel leakage.The front-end probe that the technology is made up of semipermeable membrane detection pipe and sensing cable, detection infiltrate through
The resistance that the natural gas and probe of detection pipe include, which reacts, generates signal.The disadvantages of the method are as follows if pipe leakage occurs,
The sensing cable for touching leakage combustion gas will lose monitoring function, need to carry out the replacement of sensing cable.Publication No. CN
The patent document of 203604997U discloses a kind of steel gas pipe underground leakage monitoring alarm system.The system is needed in detection pipe
Interior formation negative pressure is monitored leak condition by the way that the detection control structure at detection pipe both ends is arranged in.Party's law limitation
It is that cannot continuously monitor gas station in detection pipe, and rely solely on speed control and detection time is poor, positioning accuracy is limited.
The patent document of Publication No. CN104359629A discloses a kind of device and method for leakage detection and location, utilizes
The detection pipe of a piece laying captures source of leaks, and source of leaks is carried back detection unit using dynamical system, and discovery leakage is reported
It is alert, according to the time difference of signal detection and dynamical system speed, leakage point can be positioned.Due to there was only a detection
Pipe, this kind of method cannot continuously be monitored leakage situation.
In conclusion being directed to pipe leakage, it is currently suggested many solutions and method, however, these improvement all do not have
Have and thoroughly solve the problems, such as original, improvement while, often also brings new problem, therefore it is necessary to line leakage method and
Technology is further studied.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of, the pipeline gas micro-leakage based on detection pipe is continuous
Monitoring method and device are captured the micro right weather gas of leakage using the normal pressure state detection pipe of pipeline parallel lay-up, utilized
Power unit will return in detection unit containing micro natural gas carrier gas load, be analyzed by detection unit carrier gas, be sent out
Leakage alarm now is issued beyond detection threshold value, is alternately detected, is realized to the continuous of pipeline gas pipeline by two detection pipes
Detection.By realizing the positioning to leakage point using the conservation of mass, positioning accuracy is improved.
To achieve the above object, the present invention takes following technical scheme: a kind of pipeline gas based on detection pipe is micro
Leak continuous monitoring method comprising Auto-Sensing Mode, detection pattern, data analytical model, continuous monitoring operation mode and filtering
Device replaces mode, and each mode is based on pipeline gas micro-leakage continuous monitoring device and is operated；Described device includes setting
The first detection pipe and the second detection pipe right above natural gas line, carrier gas enter the first detection pipe through the first filter element,
Enter the second detection pipe through the second filter element；First end positioned at first detection pipe and the second detection pipe is provided with mark
Gas injection unit；The second end of first detection pipe and the second detection pipe filters with third through the first solenoid valve single respectively
Member, physical property detection unit are connected with vacuum pump one end, and the vacuum pump other end connects through flow controlling unit and gas analyzer
It connects；First solenoid valve, physical property detection unit, vacuum pump, flow controlling unit and gas analyzer are and PLC technology
Device electrical connection；Second solenoid valve, position are provided between first filter element and the first end of first detection pipe
Third solenoid valve, first detection pipe are provided between second filter element and the first end of second detection pipe
First end and second detection pipe first end between be arranged in parallel the 4th solenoid valve, be located at the mark gas injection singly
The outlet of member is provided with the 5th solenoid valve；The second solenoid valve, the 4th solenoid valve, third solenoid valve and the 5th solenoid valve with
The programmable controller electrical connection；The Auto-Sensing Mode: confirming the state of the first to the 5th solenoid valve, opens preceding the
Four solenoid valves are cut-off dissengaged positions, and second solenoid valve and third solenoid valve be in opening-wide state, the first detection pipe of guarantee and the
Two detection pipes are in interior pressure and ambient pressure is in equilibrium state, and the 4th solenoid valve is in close state；The detection pattern:
It is detected using the first detection pipe, closes the 4th solenoid valve, open second solenoid valve and third solenoid valve, control the first electromagnetism
Valve is connected to the first detection pipe with vacuum pump, and the second detection pipe is connected to third filter element；The 5th solenoid valve is controlled, will be identified
Gas injection unit is connected to the first detection pipe, after the mark gas of predetermined amount is injected into the first detection pipe, closes the 5th
Solenoid valve；Start vacuum pump and mass flow control unit, physical property detection unit acquisition testing gas temperature, pressure and density number
According to CH in gas analyzer continuous collecting carrier gas4、H2Characteristic gas concentration data, and transfer data to programmable controller.
Further, the data analytical model: programmable controller is by the physical property recorded, technique, concentration of component
Data are analyzed, and after filtering noise reduction normalization, output to industrial PC is shown in real time；User according to pipeline along
Background signal intensities carry out background to daily monitoring signals, and lowest signal alarm threshold value is arranged, when monitoring signals are more than
After alarm signal threshold value, system issues alarm；It, will according to the gas mass flow monitored, gas temperature and pressure before monitoring
Gas flow is converted into the distance of corresponding length, and then inverse leakage point position, by seeking first derivative to leakage signal curve
Dead-center position determines leakage point；The distance of monitoring inverse is proofreaded by existing pipeline physical length, passes through school
To coefficient, anchor point inverse distance is modified.
Further, the continuous monitoring operation mode: when gas analyzer detects the mark gas signal that distance terminates
Afterwards, the 5th solenoid valve of starting injects mark gas into the second detection pipe, starts the first solenoid valve, by the second detection pipe and vacuum
Pump connection, while being connected to the first detection pipe and third filter element；Repeat detection operation.
Further, the filter replacement mode, the first filter element are replaced online: being opened the 4th solenoid valve, closed
Second solenoid valve is closed, the online replacement of the first filter element is completed, second solenoid valve is opened after replacement, closes the 4th electromagnetism
Valve；The online replacement operation of second filter element is consistent with the first filter element.
A kind of pipeline gas micro-leakage continuous monitoring device based on detection pipe for realizing above-mentioned monitoring method, packet
Include the first filter element, the second filter element, mark gas injection unit, the first detection pipe, the second detection pipe, the first solenoid valve,
Third filter element, physical property detection unit, vacuum pump, mass flow control unit, gas analyzer, programmable controller and work
Control computer；The leakage gas of natural gas line is carried by carrier gas, and the carrier gas containing leakage gas is filtered through described first
Unit enters first detection pipe, enters second detection pipe through second filter element；Positioned at first detection
The first end of pipe and the second detection pipe is additionally provided with the mark gas injection unit, the mark of the mark gas injection unit output
Gas is used to for the carrier gas for entering detection pipe being identified；The second end of first detection pipe and the second detection pipe passes through described
First solenoid valve is connect with the third filter element, physical property detection unit and vacuum pump one end respectively, and the vacuum pump is another
End is connect through the flow controlling unit with the gas analyzer；First solenoid valve, physical property detection unit, vacuum pump,
Flow controlling unit and gas analyzer are electrically connected with the programmable controller, the programmable controller and the industry control
Computer carries out information exchange.
Further, the second electromagnetism is provided between first filter element and the first end of first detection pipe
Valve, is provided with third solenoid valve between second filter element and the first end of second detection pipe, and described first
The 4th solenoid valve has been arranged in parallel between the first end of detection pipe and the first end of second detection pipe；Second electromagnetism
Valve, the 4th solenoid valve and third solenoid valve are electrically connected with the programmable controller.
Further, the outlet of the mark gas injection unit is provided with the 5th solenoid valve, the mark gas injection is single
The outlet of member is connected with the first end of the first end of first detection pipe and the second detection pipe respectively by the 5th solenoid valve
It connects；4th solenoid valve is electrically connected with the programmable controller.
Further, the carrier gas uses air or nitrogen.
Further, first detection pipe and the second detection pipe are used to trapping gas leakage, with the natural gas line
Parallel arrangement, two detection pipes are respectively positioned on the 12 o'clock direction of the natural gas line.
Further, first detection pipe and the second detection pipe are all made of air-tightness hose, first detection pipe and
Two detection pipes contain osmotic membrane layer.
The invention adopts the above technical scheme, which has the following advantages: 1, the present invention with micro natural gas to catch
Based on the state-detection pipe for collecting function, by the thickness of osmotic membrane layer in two detection pipes of selection, so that detection pipe is in normal pressure ring
It can be realized the trapping to micro-leakage gas under border.2, it by the present invention in that being switched with 2 detection pipes, realizes to natural gas tube
The continuous monitoring of road leak condition.3, the present invention is determined by setting leak threshold, and the leakage alarm of minimum gas may be implemented.
4, by the present invention in that with the location algorithm based on the conservation of mass, more accurate measurement can be carried out to leakage point.5, this hair
Bright device has the characteristics that Sensitivity is high, positioning accuracy is good, rate of false alarm is low, can continuously monitor, flexible operation, to day
Right feed channel can be realized the minute leakage monitoring capability down to several decaliters per hour, can find pipe leakage or premature leak.
To sum up, the present invention can apply in natural gas leaking monitoring technical field extensively.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Specific embodiment
In the description of the present invention, it is to be understood that, the orientation or positional relationship of the instructions such as term "front", "rear" is base
In orientation or positional relationship shown in the drawings, it is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply opposite
Importance.The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention provides a kind of pipeline gas micro-leakage continuous monitoring device based on detection pipe,
Including the first filter element 1, the second filter element 3, second solenoid valve 15, the 4th solenoid valve 17, the 16, the 5th electricity of third solenoid valve
Magnet valve 18, mark gas injection unit 5, the first detection pipe 2, the second detection pipe 4, the first solenoid valve 6, third filter element 7, physical property
Detection unit 8, vacuum pump 9, mass flow control unit 10, gas analyzer 11, programmable controller 12 and industrial PC 13.
The leakage gas of natural gas line 14 is carried by carrier gas, and the carrier gas containing leakage gas is single through the first filtering
Member 1 enters the first detection pipe 2, enters the second detection pipe 4 through the second filter element 3；Positioned at the first detection pipe 2 and the second detection pipe
4 first end is additionally provided with mark gas injection unit 5, and the mark gas that mark gas injection unit 5 exports will be for that will enter detection
The carrier gas of pipe is identified.The second end of first detection pipe 2 and the second detection pipe 4 through the first solenoid valve 6 respectively with third mistake
Filter unit 7, physical property detection unit 8 are connected with 9 one end of vacuum pump, and carrier gas is deflated after the filtering of third filter element 7, carrier gas
The detection such as pressure, temperature and density is carried out by physical property detection unit 8, these parameters provide original for conservation of mass localization method
Beginning data basis.First detection pipe 2 and the second detection pipe 4 will test the first end entrance of pipe through the progress vacuumize process of vacuum pump 9
The vacuum degree control at place connect with gas analyzer 11 through flow controlling unit 10, passes through in 5~95kPa, 9 other end of vacuum pump
Gas analyzer 11 detects the leakage monitoring, it can be achieved that natural gas line 1 to the continuous of detection pipe carrier gas.Wherein, the first electricity
Magnet valve 6, physical property detection unit 8, vacuum pump 9, flow controlling unit 10 and gas analyzer 11 are electric with programmable controller 12
Connection, programmable controller 12 and industrial PC 13 carry out information exchange.
In above-described embodiment, the second electromagnetism is provided between the first filter element 1 and the first end of the first detection pipe 2
Valve 15 is provided with third solenoid valve 16, the first detection pipe 2 between the second filter element 3 and the first end of the second detection pipe 4
First end and the second detection pipe 4 first end between be arranged in parallel the 4th solenoid valve 17.Second solenoid valve 15, the 4th electromagnetism
Valve 17 and third solenoid valve 16 are electrically connected with programmable controller 12.
In the various embodiments described above, the outlet of mark gas injection unit 5 is provided with the 5th solenoid valve 18, mark gas injection
The outlet of unit 5 is connected with the first end of the first end of the first detection pipe 2 and the second detection pipe 4 respectively by the 5th solenoid valve 18
It connects.5th solenoid valve 18 is electrically connected with programmable controller 12.
In the various embodiments described above, carrier gas can use air, nitrogen or other noiseless gases.
In the various embodiments described above, the first filter element 1 and the second filter element 3 can use membrane filtration or active carbon
The dew points at normal pressure of filter, control carrier gas should be less than -40 DEG C, be free of solid particulate matter.
In the various embodiments described above, mark gas injection unit 5 can use signature identification gas caisson, and mark gas can be
C2 or more hydrocarbon gas and H2Or CO etc., concentration are 1~5% (v/v).
In the various embodiments described above, the first detection pipe 2 and the second detection pipe 4 are used to trapping gas leakage, with natural gas tube
Road 14 is arranged in parallel, and two detection pipes are respectively positioned on the 12 o'clock direction of natural gas line 14, is placed in 0 right above natural gas line 14
At~30cm.First detection pipe 2 and the second detection pipe 4 are all made of air-tightness hose, need to guarantee to leak methane and other crucial groups
Divide under certain driving force, into detection pipe.First detection pipe 2 and the second detection pipe 4 contain osmotic membrane layer, permeate film thickness
Between 0.5~2mm；By preferred membrane material and film thickness, detection pipe can trap the methane gas of micro-leakage under normal pressure state
Body.
In the various embodiments described above, flow controlling unit 10 include flow controller and flowmeter, for carrier gas flux into
The accurate control of row, gas flow rate are generally 0.1~6m/s.
In the various embodiments described above, gas analyzer 11 is used for carrier gas component content analysis detection, and will test result warp
Programmable controller 12 is transmitted to industrial PC 13.Gas analyzer 11 includes the gas sensing for gas of carrier gas constituent analysis
Device, the gas sensor can be laser type sensor, infrared spectroscopy formula sensor or semiconductor-type gas sensor.Surveyed gas
Including methane, C2+, H2With the gases such as CO.
Based on above-mentioned apparatus, the continuous side of monitoring of the present invention also provides a kind of pipeline gas micro-leakage based on detection pipe
Method, this method include Auto-Sensing Mode, detection pattern, data analytical model, continuous monitoring operation mode and filter replacement mode,
Specifically:
(1) Auto-Sensing Mode: confirming the state of the first to the 5th solenoid valve, and opening preceding 4th solenoid valve 17 is cut-off
Dissengaged positions, second solenoid valve 15 and third solenoid valve 16 are in opening-wide state, guarantee the first detection pipe 2 and the second detection pipe 4
Equilibrium state is in interior pressure and ambient pressure.5th solenoid valve 18 is in close state.
(2) detection pattern: being detected using the first detection pipe 2, closes the 4th solenoid valve 17, opens second solenoid valve 15
With third solenoid valve 16, controlling the first solenoid valve 6 is connected to the first detection pipe 2 with vacuum pump 9, the second detection pipe 4 and third mistake
Unit 7 is filtered to be connected to.The 5th solenoid valve 18 is controlled, mark gas injection unit 5 is connected to the first detection pipe 2, to the first detection pipe 2
After the mark gas of interior injection predetermined amount, the 5th solenoid valve 18 is closed, the usual process is very of short duration, the duration
0.5s.Start vacuum pump 9 and mass flow control unit 10, control eluting gas flow velocity from detection pipe is 1m/s.Physical property inspection
Survey 8 acquisition testing gas temperature of unit, pressure and density data, CH in 11 continuous collecting carrier gas of gas analyzer4、H2Or other
Characteristic gas concentration data, and transfer data to programmable controller 12.By the continuous switching to two detection pipes, realize
Continuous detection to gas pipeline leakage.
(3) data analytical model: programmable controller 12 by the physical property recorded, technique, concentration of component data into
Row analysis, after filtering noise reduction normalization, output to industrial PC 13 is shown in real time.User is according to background along pipeline
Signal strength carries out background to daily monitoring signals, and lowest signal alarm threshold value is arranged, when monitoring signals are more than alarm
After signal threshold value, system issues alarm.According to the gas mass flow monitored, gas temperature and pressure before monitoring, by gas
Distance of the flow rate conversion at corresponding length, and then inverse leakage point position, by seeking first derivative zero point to leakage signal curve
Position determines leakage point.The distance of monitoring inverse is proofreaded by existing pipeline physical length, is by check and correction
Number, is modified anchor point inverse distance.
The state of the data analysis natural gas line 14 recorded according to programmable controller 12, to leakage situation into
Row alarm, positions leakage point.By multiple groups detection signal and historical data comparison after, to beyond detection threshold value signal into
Row trend analysis determines, issues leakage alarm.According to the physical property detection data and data on flows to carrier gas, when coupling apparatus is run
Between it is poor, leakage point is predicted according to conservation of mass localization method, while supplemental characteristic gas is in the survey of known physical distance
At test pile, release characteristic gas carries out secondary positioning, and to reduce position error, position error is less than 10m/km.
Wherein, conservation of mass localization method is the physical property state parameter by measuring carrier gas, by the carrier gas of extraction according to same
The isometric inverse distance of quality, determines leakage point position.Compared with according to the method for flow velocity measuring and calculating leakage distance, precision is higher.
(4) continuous monitoring operation mode: after gas analyzer 11 detects the mark gas signal that distance terminates, starting
5th solenoid valve 18 injects mark gas into the second detection pipe 4, starts the first solenoid valve 6, by the second detection pipe 4 and vacuum pump
9 connections, while being connected to the first detection pipe 2 and third filter element 7.Repeat detection operation.
(5) filter replacement mode, the first filter element 1 are replaced online: being opened the 4th solenoid valve 17, closed second
Second solenoid valve 15 is opened in solenoid valve 15, the online replacement of achievable first filter element 1 after replacement, close the 4th electricity
Magnet valve 17.The online replacement operation of second filter element 3 is consistent with the first filter element 1, and details are not described herein.
In conclusion the present invention has, Sensitivity is high, positioning accuracy is good, rate of false alarm is low, can continuously monitor, operate
Flexible feature is able to achieve natural gas line down to the monitoring capability of a few decaliter minute leakages per hour, can find pipe leakage
Or premature leak, to prevention pipeline accident, service conduit is of great importance safely.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative, protection scope of the present invention is defined by the appended claims, and those skilled in the art is not
Under the premise of the principle and substance of the present invention, various changes or modifications can be made to these embodiments, but these
Change and modification are fallen within the protection scope of the present invention.
Claims (10)
1. a kind of pipeline gas micro-leakage continuous monitoring method based on detection pipe, it is characterised in that this method includes self-test
Mode, detection pattern, data analytical model, continuous monitoring operation mode and filter replacement mode, each mode are based on managing defeated day
Right gas micro-leakage continuous monitoring device is operated；
Described device includes the first detection pipe and the second detection pipe being arranged in right above natural gas line, and carrier gas is through the first filtering
Unit enters the first detection pipe, enters the second detection pipe through the second filter element；It is detected positioned at first detection pipe and second
The first end of pipe is provided with mark gas injection unit；The second end of first detection pipe and the second detection pipe is through the first electromagnetism
Valve is connect with third filter element, physical property detection unit and vacuum pump one end respectively, and the vacuum pump other end is through flow control
Unit is connect with gas analyzer；First solenoid valve, physical property detection unit, vacuum pump, flow controlling unit and gas point
Analyzer is electrically connected with programmable controller；
It is provided with second solenoid valve between first filter element and the first end of first detection pipe, is located at described
It is provided with third solenoid valve between second filter element and the first end of second detection pipe, the first of first detection pipe
It is arranged in parallel the 4th solenoid valve between end and the first end of second detection pipe, positioned at going out for the mark gas injection unit
Mouth is provided with the 5th solenoid valve；The second solenoid valve, the 4th solenoid valve, third solenoid valve and the 5th solenoid valve with it is described can
Programmable controller electrical connection；
The Auto-Sensing Mode: confirming the state of the first to the 5th solenoid valve, and opening preceding 4th solenoid valve is cut-off cutting
State, second solenoid valve and third solenoid valve are in opening-wide state, guarantee that the first detection pipe and the second detection pipe are in interior pressure
It is in equilibrium state with ambient pressure, the 4th solenoid valve is in close state；
The detection pattern: being detected using the first detection pipe, closes the 4th solenoid valve, opens second solenoid valve and third electricity
Magnet valve, the first solenoid valve of control are connected to the first detection pipe with vacuum pump, and the second detection pipe is connected to third filter element；Control
Mark gas injection unit is connected to the first detection pipe, the mark of predetermined amount is injected into the first detection pipe by the 5th solenoid valve
After knowing gas, the 5th solenoid valve is closed；Start vacuum pump and mass flow control unit, physical property detection unit acquisition testing gas
Temperature, pressure and density data, CH in gas analyzer continuous collecting carrier gas4、H2Characteristic gas concentration data, and data are passed
It send to programmable controller.
2. monitoring method as described in claim 1, it is characterised in that: the data analytical model: programmable controller will acquire
Physical property, technique, the concentration of component data being recorded are analyzed, after filtering noise reduction normalization, output in real time to industry control electricity
Brain is shown；User carries out background to daily monitoring signals according to background signal intensities along pipeline, and is arranged minimum
Signal alarm threshold value, after monitoring signals are more than alarm signal threshold value, system issues alarm；According to the gas mass flow monitored
Amount monitors preceding gas temperature and pressure, and gas flow is converted into the distance of corresponding length, and then inverse leakage point position, is led to
It crosses and asks first derivative dead-center position to determine leakage point leakage signal curve；By existing pipeline physical length come to monitoring
The distance of inverse is proofreaded, and by proofreading coefficient, is modified to anchor point inverse distance.
3. monitoring method as described in claim 1, it is characterised in that: the continuous monitoring operation mode: when gas analyzer is examined
After measuring the mark gas signal that distance terminates, the 5th solenoid valve of starting inject mark gas into the second detection pipe, starts the
Second detection pipe is connected to by one solenoid valve with vacuum pump, while being connected to the first detection pipe and third filter element；Repeat detection behaviour
Make.
4. monitoring method as described in claim 1, it is characterised in that: the filter replacement mode, the first filter element carry out
Online replacement: opening the 4th solenoid valve, closes second solenoid valve, the online replacement of the first filter element is completed, after replacement
Second solenoid valve is opened, the 4th solenoid valve is closed；The online replacement operation of second filter element is consistent with the first filter element.
5. a kind of realize that the pipeline gas micro-leakage based on detection pipe of monitoring method as described in Claims 1-4 is continuous
Monitoring device, it is characterised in that: described device includes the first filter element, the second filter element, mark gas injection unit, first
Detection pipe, the second detection pipe, the first solenoid valve, third filter element, physical property detection unit, vacuum pump, mass flow control are single
Member, gas analyzer, programmable controller and industrial PC；
The leakage gas of natural gas line is carried by carrier gas, and the carrier gas containing leakage gas is through first filter element
Into first detection pipe, enter second detection pipe through second filter element；Positioned at first detection pipe and
The first end of second detection pipe is additionally provided with the mark gas injection unit, the mark gas of the mark gas injection unit output
For the carrier gas for entering detection pipe to be identified；The second end of first detection pipe and the second detection pipe is through described first
Solenoid valve is connect with the third filter element, physical property detection unit and vacuum pump one end respectively, the vacuum pump other end warp
The flow controlling unit is connect with the gas analyzer；First solenoid valve, physical property detection unit, vacuum pump, flow
Control unit and gas analyzer are electrically connected with the programmable controller, the programmable controller and the industrial PC
Carry out information exchange.
6. device as claimed in claim 5, it is characterised in that: positioned at the of first filter element and first detection pipe
It is provided with second solenoid valve between one end, is arranged between second filter element and the first end of second detection pipe
There is third solenoid valve, has been arranged in parallel the 4th between the first end of first detection pipe and the first end of second detection pipe
Solenoid valve；The second solenoid valve, the 4th solenoid valve and third solenoid valve are electrically connected with the programmable controller.
7. device as claimed in claim 5, it is characterised in that: the outlet positioned at the mark gas injection unit is provided with the 5th electricity
Magnet valve, it is described mark gas injection unit outlet by the 5th solenoid valve respectively with the first end of first detection pipe and
The first end of second detection pipe connects；4th solenoid valve is electrically connected with the programmable controller.
8. device as claimed in claim 5, it is characterised in that: the carrier gas uses air or nitrogen.
9. device as claimed in claim 5, it is characterised in that: first detection pipe and the second detection pipe are used to trapping leakage
Gas, is arranged in parallel with the natural gas line, and two detection pipes are respectively positioned on the 12 o'clock direction of the natural gas line.
10. device as claimed in claim 9, it is characterised in that: first detection pipe and the second detection pipe are all made of air-tightness
Hose, first detection pipe and the second detection pipe contain osmotic membrane layer.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112403234A (en) * | 2020-04-21 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Method and system for detecting production safety of analytic tower and acid making system |
| CN113108244A (en) * | 2021-04-30 | 2021-07-13 | 中海石油气电集团有限责任公司 | Method and system for monitoring and positioning leakage of natural gas pipeline containing hydrogen |
| CN113669631A (en) * | 2021-07-01 | 2021-11-19 | 郦剑飞 | Gas equipment leakage detection device and method |
| CN113864663A (en) * | 2021-08-23 | 2021-12-31 | 河海大学 | A system and method for early warning and treatment of waste gas leakage from underground pipelines |
| CN115389280A (en) * | 2022-10-31 | 2022-11-25 | 北京唯思德科技有限公司 | Gas production device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011127546A1 (en) * | 2010-04-15 | 2011-10-20 | Asel-Tech Tecnologia E Automação Ltda. | Integrated system with acoustic technology, mass imbalance and neural network for detecting, locating and quantifying leaks in ducts |
| CN103629533A (en) * | 2013-11-12 | 2014-03-12 | 常州大学 | Device and method for monitoring leakage of multiple parallel-buried natural gas pipelines |
| US20150308919A1 (en) * | 2014-04-28 | 2015-10-29 | Northeastern University | Intelligent adaptive system and method for monitoring leakage of oil pipeline networks based on big data |
| CN210462475U (en) * | 2019-07-18 | 2020-05-05 | 中海石油气电集团有限责任公司 | Defeated natural gas of pipe trace leaks continuous monitoring device based on detecting tube |
-
2019
- 2019-07-18 CN CN201910649803.2A patent/CN110319351B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011127546A1 (en) * | 2010-04-15 | 2011-10-20 | Asel-Tech Tecnologia E Automação Ltda. | Integrated system with acoustic technology, mass imbalance and neural network for detecting, locating and quantifying leaks in ducts |
| CN103629533A (en) * | 2013-11-12 | 2014-03-12 | 常州大学 | Device and method for monitoring leakage of multiple parallel-buried natural gas pipelines |
| US20150308919A1 (en) * | 2014-04-28 | 2015-10-29 | Northeastern University | Intelligent adaptive system and method for monitoring leakage of oil pipeline networks based on big data |
| CN210462475U (en) * | 2019-07-18 | 2020-05-05 | 中海石油气电集团有限责任公司 | Defeated natural gas of pipe trace leaks continuous monitoring device based on detecting tube |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112403234A (en) * | 2020-04-21 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Method and system for detecting production safety of analytic tower and acid making system |
| CN113108244A (en) * | 2021-04-30 | 2021-07-13 | 中海石油气电集团有限责任公司 | Method and system for monitoring and positioning leakage of natural gas pipeline containing hydrogen |
| CN113669631A (en) * | 2021-07-01 | 2021-11-19 | 郦剑飞 | Gas equipment leakage detection device and method |
| CN113864663A (en) * | 2021-08-23 | 2021-12-31 | 河海大学 | A system and method for early warning and treatment of waste gas leakage from underground pipelines |
| CN115389280A (en) * | 2022-10-31 | 2022-11-25 | 北京唯思德科技有限公司 | Gas production device |
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