CN207570973U - Aerosol monitoring device and pipe-line system in pipeline - Google Patents
Aerosol monitoring device and pipe-line system in pipeline Download PDFInfo
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- CN207570973U CN207570973U CN201721426683.2U CN201721426683U CN207570973U CN 207570973 U CN207570973 U CN 207570973U CN 201721426683 U CN201721426683 U CN 201721426683U CN 207570973 U CN207570973 U CN 207570973U
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Abstract
This application discloses aerosol monitoring device and pipe-line system in a kind of pipeline, monitoring device includes：Diameter changing mechanism can control the aperture of pipeline；Detection road is provided with the measuring device for being tested aerosol concentration and particle diameter distribution aerosol concentration and particle diameter distribution；The arrival end of sampling mechanism is connected with the pipeline positioned at diameter changing mechanism upstream, and the port of export of sampling mechanism is connected with detecting the entrance on road；The port of export for the mechanism that flows back is connected with the pipeline positioned at diameter changing mechanism downstream, the arrival end for the mechanism that flows back and the outlet on detection road；First testing agency, the first testing agency are used to be detected the flow of the gas in pipeline；Second testing agency, the second testing agency are used to be detected the flow of the gas in detection road；First control valve, the first control valve are used to control the flow of the gas in detection road.The monitoring device is dynamically adapted the aperture of diameter changing mechanism, realizes that the flow velocity of sample gas is identical with the flow velocity of gas in pipelines, improves the accuracy of measurement.
Description
Technical field
The utility model is to be related to pipeline field, particularly aerosol monitoring device and pipeline system in a kind of pipeline
System.
Background technology
In general, the gas in pipeline, often with some dust or impurity, these impurity may endanger the fortune of pipeline
Row safety.For example, high pressure gas pipeline generally can all be entrained with the particulate matters such as dust and drop during exploitation sum aggregate is defeated
Impurity.The high pressure gas pipeline particularly just built up, remaining dust of constructing directly threatens the operational safety of upstream device, right
The influence of gas turbine and compressor is particularly acute.And in the During Process of Long-term Operation of high pressure gas pipeline, due to natural gas gas
The variation of matter can be there are condensed liquid and water generation and deposition, high pressure gas pipeline internal corrosion and inner coating come off etc. and can increase
The content of solid impurity, especially under pigging operating mode, supercharging equipment, instrument valve to downstream etc. are affected.Natural gas station
The common cyclone separator in field and filter remove above-mentioned particulate contaminant.
Cyclone separator dust removing effects when separation equipments are at the initial stage of building a station and pigging are apparent, disclosure satisfy that technological requirement.
But after a period of time is run, in cyclone separator the problems such as existing critical component abrasion, particulate contaminant deposition, it can influence
To the actual motion performance of cyclone separator.The core element of filter is filter core, as non-standard equipment, different manufacturers, no
Actual filtration spread in performance with the filter core of batch does not rise, caused by filter core design is unreasonable, uses the problems such as misoperation
The accidents such as filter failure, compressor disorderly closedown happen occasionally.Therefore, to the aerosol concentration and grain size in practical pipeline
Distribution is detected and monitors, and helps to understand makings situation and the actual performance of evaluation filtering separation device in pipeline, maximum
The guarantee conduit running safety of limit.
A Patent No. " ZL201210479392.5 " is disclosed in Chinese patent library, is entitled " suitable for high pressure
The file of the device and method of gas pipeline endoparticle object on-line checking ", it discloses one kind to be suitable in high-pressure gas pipelines
The device and method of particulate matter on-line checking, online detection unit include the main sampling mouth and flow distributor that are sequentially connected in series；
The front end of main sampling mouth is stretched into the high-pressure gas pipelines that need to be detected, end concatenation flow distributor gas feed；Assignment of traffic
There are one cavity, cavity separates two pipelines of main road and bypass for device setting, and main road is sequentially connected in series double sampling mouth, online particulate matter
Grain size spectrometer and the first mass flow controller, bypass the second mass flow controller of concatenation；The main mouth that samples is from high pressure gas
In pipeline after sampling, institute's gas production sample from flow distributor gas feed after diffusing into cavity, respectively through double sampling mouth and
Bypass outlet is discharged.
The device can also further comprise offline inspection unit, monitor unit on-line for a long time.Offline inspection unit includes the
Two particulate matter traps, second particulate matter trap one end is connected to the pipeline between main sampling mouth and flow distributor, another
It holds on the pipeline before being connected to bypass outlet and the second mass flow controller, is mainly used for its testing result with online inspection
The results contrast of survey verifies reliability.Long-term on-line monitoring unit includes sensor of dust concentration and computer, and dust concentration passes
Sensor is used to detect dust situation in pipeline, by the particle concentration value in pipeline change into current signal transfer to computer with
Realize long-term on-line monitoring.
But the utility model still has following deficiency：
First, the utility model only " discharges " the subsequent processing mode of sample gas." discharge " may be generally understood to " draw
Be vented to safety zone ", this can cause the waste of sample gas, especially high pressure operating mode and etc. under conditions of dynamic sampling, sample
The loss amount of product gas is larger.Pipeline using pressure 10MPa, gas flow rate as 10m/s takes using sampling pipe of the internal diameter for 6mm etc. is dynamic
For sample, required sample gas flow reaches 400Nm3/h.Also be understood as " sample gas be passed through other containers and avoid emptying wave
Expense " or " supercharging is recycled into former pipeline ", this kind of processing method is more demanding to technique and equipment, not only increases sample pressure
Multiple gas leakage risk points such as force container or gas compressor, connecting line, also increase purchase sample gas supercharging re-injection set
Standby, site operation workload, device space etc. integrate cost.
2nd, the electrostatic concentration sensor that the utility model uses is only capable of obtaining roughly the concentration levels of particulate contaminant, and
The on-line testing of the concentration and particle diameter distribution of particulate contaminant cannot be realized simultaneously, be especially unsuitable for monitoring on-line and analyzing
Filter separative efficiency of the separation equipment to the particle of different-grain diameter.
Utility model content
In order to overcome the defects of the prior art, the utility model embodiment provides aerosol monitoring in a kind of pipeline and fills
At least one of it puts and pipe-line system, can solve the above problems.
The embodiment of the present application discloses：Aerosol monitoring device in a kind of pipeline, including：
Diameter changing mechanism, the diameter changing mechanism can control the aperture of the pipeline；
Road is detected, the detection road is provided with the measurement dress for being tested aerosol concentration and particle diameter distribution
It puts；
Sampling mechanism, the arrival end of the sampling mechanism are connected with the pipeline positioned at the diameter changing mechanism upstream, institute
The port of export for stating sampling mechanism is connected with the entrance on the detection road；
Flow back mechanism, and the port of export of the reflux mechanism is connected with the pipeline positioned at the diameter changing mechanism downstream, institute
State the arrival end of reflux mechanism and the outlet on the detection road；
First testing agency, first testing agency are used to be detected the gas in pipeline；
Second testing agency, second testing agency are used to be detected the gas in detection road；
First control valve, first control valve are used to control the gas in the detection road.
Further, the diameter changing mechanism includes multiple wedge shaped baffles along the circumferential direction arranged, each wedge shape gear
Plate is rotatablely connected by adjusting fulcrum and swing-around trajectory, the diameter changing mechanism further include be arranged on pipe side wall and can around it oneself
The rotary shaft of body axis rotation, the rotary shaft is sequentially connected with the swing-around trajectory, so as to enable the swing-around trajectory along circle
Circumferential direction rotates.
Further, the detection road is additionally provided with the first particulate matter trap, first particulate matter trap
Filtering accuracy is greater than or equal to 0.3 micron.
Further, the sampling mechanism includes a moving component, so that the opening of the sampling pipe is in the pipeline
Towards the flow direction of the gas in pipeline when aerosol monitoring device is in detection state, and the opening of the sampling pipe can be made
Not towards the flow direction of the gas in pipeline when aerosol monitoring device is in non-detection status in the pipeline.
Further, the sampling mechanism includes being plugged in the sampling pipe of the pipe side wall and for driving the sampling
The driving mechanism of pipe rotation, the driving mechanism can make the opening of the sampling pipe in the pipeline at aerosol monitoring device
Towards the flow direction of the gas in pipeline when the state of detection, and the opening of the sampling pipe gas in the pipeline can be made molten
The flow direction of gas when glue monitoring device is in non-detection status in pipeline.
Further, aerosol monitoring device includes bypass in the pipeline, and the bypass detects road simultaneously with described
Join, the second control valve for being controlled the bypass is provided on the bypass.
Further, aerosol monitoring device includes flow distributor in the pipeline, and the flow distributor has defeated
Enter end, the first output terminal and second output terminal, wherein, the input terminal of the flow distributor and the port of export of the sampling mechanism
Connection, the first output terminal of the flow distributor are connected with detecting the entrance on road, the second output terminal of the flow distributor
It is connected with the entrance of bypass.
Further, first testing agency include can to the pressure differential at the entrance and exit of the diameter changing mechanism into
The differential pressure transmitter of row detection.
Further, the sampling mechanism and the reflux mechanism respectively include Sampler valves and return valve, with control
The operation and stopping of the detection device.
Further, the sampling mechanism and the detection road are respectively arranged with the first emptying valve and the second blow valve
Door.
Further, which further includes an attemperator, which is used to make the sample in measuring device
Temperature be not less than gas in pipelines temperature.
Further, which further includes the control unit for being controlled the detection device, the control
Portion and the measuring device are integrally disposed or, the control unit is independently arranged.
The embodiment of the present application also discloses a kind of pipe-line system, including filtering separation device and is arranged on the filtering point
From aerosol monitoring device in the pipeline as described above of equipment upstream and downstream.
The beneficial effects of the utility model are：
1st, diameter changing mechanism is adjusted by dynamic, the flow velocity for realizing sample gas is identical with gas in pipelines flow velocity, improves
The accuracy measured；
2nd, reflowable to the former pipeline of sample gas solves the subsequent processing problem of high pressure sample gas, avoids resource
Waste；
3rd, sampling mechanism not object gas flow in non-detection status, so as to avoid sampling mechanism entrance in non-detection
The particulate contaminant deposition of section blocks thief hatch, and then the dust that is deposited of while avoiding detecting again is brought into detection device and makes
Into data error.
4th, aerosol grain size spectrometer can cause monitoring process have automatically control, high concentration alarm, sample lines clean
Etc. functions, realize pipeline in aerosol concentration and the long-term on-line monitoring of particle diameter distribution.
5th, the detection device can further be extended to the separating property detection of filtering separation device, solve high pressure operating mode
The actual performance of lower filtering separation device can not long term monitoring problem.
Above and other objects, features and advantages to allow the utility model can be clearer and more comprehensible, preferable reality cited below particularly
Example is applied, and coordinates institute's accompanying drawings, is described in detail below.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure diagram of aerosol monitoring device in pipeline in the embodiment of the present application.
Fig. 2 a are the structure diagrams of a state of the diameter changing mechanism in Fig. 1.
Fig. 2 b are the structure diagrams of another state of the diameter changing mechanism in Fig. 1.
Fig. 3 is the principle schematic using the aerosol grain size spectrometer of light scattering method.
Fig. 4 is the structure diagram of aerosol grain size spectrometer.
Fig. 5 is the structure diagram of sampling mechanism.
Fig. 6 is axial schematic cross-section of the mechanism along pipeline that flow back.
Fig. 7 a are a kind of schematic cross-section of the mechanism along the radial direction of pipeline that flow back.
Fig. 7 b are schematic cross-section of another reflux mechanism along the radial direction of pipeline.
Fig. 8 is the flow diagram of aerosol monitoring device in pipeline.
Fig. 9 is the structure diagram of the pipe-line system in the utility model embodiment.
The reference numeral of the figures above：1- sampling mechanisms, 2- Sampler valves, 3- flow distributors, 4- aerosol Sizes
Instrument, the first particulate matter traps of 5-, the second particulate matter traps of 6-, the second testing agencies of 7-, 8- thirds testing agency, 9- first
Control valve, the second control valves of 10-, 11- return valves, 12- reflux mechanism, 13- first are vented valve, and 14- second is vented
Valve, 15- diameter changing mechanisms, the first testing agencies of 16-, 1a- sampling mouths, 1b- driving mechanisms, 1c- sampling pipes, 1d- sealings,
15a- wedge shaped baffles, 15b- actuators, 15c- rotary shafts, 15d- swing-around trajectories, 15e- adjust fulcrum, 4a- photodetections analysis
Unit, 4b- signal acquisitions and output unit, 4c- central processing unit, 4d- scenes are shown and control unit, 4e- communication units,
Aerosol monitoring device in 17- pipelines, 18- filtering separation devices, 20- detections road, 21- bypasses, 22- pipelines；23- illuminations system
System, 24- scattering light collecting systems, 25- signal processing systems.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
With reference to shown in Fig. 1, the embodiment of the present application discloses aerosol monitoring device 17 in a kind of pipeline, including：Reducing machine
Structure 15, the diameter changing mechanism 15 can control the aperture of the pipeline 22；Road 20 is detected, is provided on the detection road 20
For the measuring device tested aerosol concentration and particle diameter distribution；Sampling mechanism, the arrival end of the sampling mechanism with
The pipeline 22 positioned at 15 upstream of diameter changing mechanism connects, and the port of export of the sampling mechanism enters with the detection road 20
Mouth connection；Flow back mechanism 12, the port of export and the pipeline 22 positioned at 15 downstream of diameter changing mechanism of the reflux mechanism 12
Connection, the arrival end of the reflux mechanism 12 and the outlet on the detection road 20；First testing agency 16, first inspection
Mechanism 16 is surveyed for being detected to the flow of the gas in pipeline 22；Second testing agency 7, second testing agency 7 uses
It is detected in the flow to the gas in detection road 20；First control valve, first control valve are used for the detection road
The flow of gas in 20 is controlled.
By said mechanism, the first testing agency 16 can measure to obtain the flow under 22 normal condition of pipeline.And lead to
15 and first control valve of diameter changing mechanism is crossed to adjust the flow in detection road 20, so that the flow velocity of the gas in detection road 20
It is identical with the flow velocity under 22 normal condition of pipeline.The gas that measuring device can be pair with identical flow velocity under 22 normal condition of pipeline in this way
Body measures, and so as to which the gas for making measurement levels off to actual conditions, particulate matter changes caused by reducing sampling, and then obtains more
Add accurate result.In addition, the flow velocity of gas that reflux mechanism 12 passes back into pipeline 22 is also very fast, it will not be to the gas in pipeline 22
Body has an impact.
With reference to shown in Fig. 2 a and Fig. 2 b, specifically, diameter changing mechanism 15 includes multiple wedge shaped baffles along the circumferential direction arranged
15a, each wedge shaped baffle 15a adjust the fulcrum 15e and circumferentially rotated swing-around trajectory 15d of energy by one and are rotatablely connected.
Diameter changing mechanism 15, which further includes, is arranged on being rotated around its own axis and being driven company with the swing-around trajectory 15d for 22 side wall of pipeline
The rotary shaft 15c connect.Operating personnel can be by rotating rotary shaft 15c so that axis directions of the swing-around trajectory 15d along pipeline 22
Rotation, so as to adjust the size (i.e. the aperture of pipeline 22) of the sectional area for the opening that each wedge shaped baffle 15a is formed.
For example, referring to Fig. 2 a, it is one of at this time adjust fulcrum 15e (in figure one of closest rotary shaft 15c) with
The angle formed between the axis of rotary shaft 15c is 9 ° (its aperture is 70%).Operating personnel are by rotating rotary shaft 15c
Swing-around trajectory 15d is rotated, so as to which one identical with upper figure be made to be formed between adjusting the axis of fulcrum 15e and rotary shaft 15c
Angle become 15 ° (its aperture be 40%) (with reference to Fig. 2 b).As a result, under each wedge-shaped catch interaction so that pipeline 22
Aperture become smaller.Similar, operating personnel can also be become larger by rotating the aperture of rotary shaft 15c pipelines 22.Preferably,
In order to facilitate the operation, one end that the rotary shaft 15c is located at outside the pipeline 22 can be provided with actuator 15b.
Diameter changing mechanism 15 can be gradual reduced inner diameter, gas is avoided in pipeline 22 to occur due to caliber is mutated serious
Turbulent flow ensure that the smooth-going that gas flows in pipeline 22, make the sample gas for entering sampling mouth 1a representative.
Of course, in other optional embodiments, the diameter changing mechanism 15 can also be other structures, as long as described
Diameter changing mechanism 15 can mechanically or electronically or pneumatically adjust the aperture of pipeline 22 based on demand.
With reference to shown in Fig. 1, first testing agency 16 include can be to the entrance and exit of the diameter changing mechanism 15 at
The differential pressure transmitter that pressure differential is detected.Wherein, differential pressure transmitter is used to measure the pressure of near-wall before and after diameter changing mechanism 15
Difference.After the pressure difference for getting the opening value of pipeline 22 and diameter changing mechanism 15, it is possible to obtain the inlet of sampling mechanism
Gas flow rate, and then the sample gas flow needed for realization " waiting sampling " can be conversed according to the internal diameter of measuring device.It " waits
Sampling " also referred to as " isokinetic sampling ", generally refers to the gas velocity of the sample measured and 22 gas under normal condition of pipeline
Speed is equal, in order to which particulate matter changes caused by reducing sampling.
Of course, in other optional embodiments, first testing agency 16 can be that other can be calculated
The detection device of gas flow rate in pipeline 22.Such as first testing agency 16 can examine the flow in pipeline 22
It surveys, so as to obtain the flow velocity of gas based on the aperture of pipeline 22.
With reference to shown in Fig. 1, the measuring device for being detected to the gas sampled out is provided on the detection road 20.
The measuring device is aerosol grain size spectrometer 4.It is dense that aerosol grain size spectrometer 4 is used for the particulate matter measured in sample gas aerosol
Degree and particle diameter distribution.Aerosol, also known as gas diffuser system are to be disperseed by solid or liquid fine particle and be suspended in gas medium
The colloidal dispersion system of middle formation, dispersed phase are solid or liquid fine particle, and size is 0.001~100 micron, and dispersion is situated between
Matter is gas.
In the present embodiment, the aerosol grain size spectrometer 4 may be used light scattering method and be detected online.Light dissipates
The basic principle for penetrating method is mainly based upon Mie scattering theories, is the mensuration that standard accreditation is uniquely obtained other than weight method,
It is that relatively broad, universal method is applied in current particle concentration and granulometry.Using the aerosol grain size of light scattering method
Spectrometer 4 generally comprises light source, lighting system 23, scattering light collecting system 24, signal processing system 25 etc., and workflow is as schemed
Shown in 3：The light that light source is sent out collimates after lighting system 23 injects dust-contained airflow pipeline 22 for a branch of directional light, receives light path
The size for receiving population scattered light intensity depends on dust size and optical wavelength, and the scattering light of particle is transferred to by reception system
Photoelectric sensor, photoelectric sensor optical signal are converted into electric signal, the height for measuring pulse number and single pulse through electric signal
Degree, and then calculate to obtain dust content and size distribution in tested air-flow.
Specifically, with reference to shown in Fig. 4, aerosol grain size spectrometer 4 includes photodetection analytic unit 4a, signal acquisition and defeated
Go out unit 4b, central processing unit 4c, scene display and control unit 4d, communication unit 4e.
Wherein, photodetection analytic unit 4a be responsible for particulate matter signal detection, will scattering light pulse be converted into electric signal,
And the information such as particle pulse number and intensity are analyzed, and then be transferred to signal acquisition and output unit 4b.Preferably, photodetection
Analytic unit 4a is integrated with temperature and pressure sensing module, and (independent temperature and pressure sensor may also be arranged on online aerosol
On pipeline between grain size spectrometer 4 and detection 20 particulate matter trap 5 of road).
Wherein, signal acquisition and the function of output unit 4b include signal acquisition and signal exports.Signal acquisition includes light
Electrical resistivity survey survey the particle information that analytic unit 4a transmits, valve state information, in pipeline 22 gas flow or flow velocity (including main pipeline
22nd, road 20 and bypass 21 are detected), the signals such as gas temperature and pressure in pipeline 22.Signal output includes opening and closing light
Electrical resistivity survey surveys control signal such as control signal, related valve and the diameter changing mechanism 15 of analytic unit, rotary shaft 15c etc..
Wherein, central processing unit 4c is responsible for signal acquisition and output unit 4b provides analysis and the record of signal, and
Corresponding operating is instructed, respective execution mechanisms are passed to, while system information is illustrated in by signal acquisition and output unit 4b
Scene display and control unit 4d, and pass through communication unit 4e teletransmissions to remote terminals such as Central Control Rooms.In addition, central processing unit
4c also is responsible for handling the instruction from received by scene display and control unit 4d, communication unit 4e, and control on-line monitoring
Each component in device completes the instruction repertorie influenced.
Of course, in other optional modes, aerosol grain size spectrometer 4 can also use light scattering method etc..If it only needs
It obtains particle concentration and optical transmission method, capacitance method, microwave method, supercritical ultrasonics technology, electrostatic method etc. may be selected.For example, using electrostatic
The aerosol grain size spectrometer 4 of method utilizes electrostatic induction principle, and electrostatic induction probe is inserted into dust-contained airflow pipeline 22, probe outer end
By wired earth, when the dust particles in dust-contained airflow and probe collide or during near tat probe, probe can sense quiet
Charge, and charge is introduced into ground by earth lead, the Weak current in conducting wire is detected using high performance amplifier, it can be right
The variation of dust concentration is monitored.
With reference to shown in Fig. 1, the second testing agency 7 and the first control valve are additionally provided on the detection road 20.Described second
Testing agency 7 is used to be detected the gas in detection road 20.Second testing agency 7 can be flowmeter.First control
Valve processed is used to control the gas in the detection road 20.First control valve can be the butterfly valve that can adjust aperture.
After the first testing agency 16, which measures, obtains the flow velocity of gas in pipeline 22 under normal condition, so as to measure detection road
The flow value of gas needed for 20.Then by adjusting diameter changing mechanism 15 come the preliminary stream for adjusting the gas into detection road 20
It measures, then by the first control valve come the accurate flow for adjusting the gas in detection road 20, so that the gas by measuring device
Flow velocity is equal with the flow velocity of gas in pipeline under normal condition 22.
Preferably, it is additionally provided with the first particulate matter trap 5 on the detection road 20.First particulate matter trap 5 can be with
For trapping the particulate matter detected in 20 sample gas of road, filtering accuracy should reach 0.3 micron or higher, and resistance should be as far as possible
It is low.The filtering material of the trap selects metal sintered material or metallic fiber material.It is caught under certain sample tolerance by calculating
The particulate matter quality collected can obtain the particulate matter quality concentration in sample gas, by particle size analysis means (including library
Your special electric-resistivity method, laser diffractometry etc.) particle diameter distribution of particulate matter is can obtain, convenient for the test knot with aerosol grain size spectrometer 4
Fruit compares.
The detection road 20 forms gas circuit by sampling mechanism and reflux mechanism 12 and recycles.Specifically, the Sampling Machine
The arrival end of structure is connected with positioned at the pipeline 22 of 15 upstream of diameter changing mechanism, the port of export of the sampling mechanism with it is described
Detect the entrance connection on road 20.The port of export and the pipeline 22 positioned at 15 downstream of diameter changing mechanism of the reflux mechanism 12
Connection, the arrival end of the reflux mechanism 12 and the outlet on the detection road 20.
The sampling mechanism includes a moving component, so that the sampling mouth 1a (i.e. the opening of sampling pipe 1c) is in the pipe
Towards the flow direction of the gas in pipeline 22 when aerosol monitoring device 17 is in detection state in road, and the sampling can be made
The flow direction of gases of mouth 1a when aerosol monitoring device 17 is in non-detection status in the pipeline in pipeline 22.
With reference to shown in Fig. 5, in the present embodiment, the sampling mechanism includes being plugged in the sampling of 22 side wall of pipeline
Pipe 1c and driving mechanism 1b, the driving mechanism 1b for the sampling pipe 1c to be driven to rotate around its own axis can make described
Towards the flowing side of the gas in pipeline 22 when sampling mouth 1a aerosol monitoring devices 17 in the pipeline are in detection state
To, and can make the sampling mouth 1a when aerosol monitoring device 17 is in non-detection status in the pipeline in pipeline 22
Gas flow direction.Preferably, the sampling mechanism further includes the sealing 1d being set in outside the sampling pipe 1c.It is described
Sealing 1d can seal pipeline 22, and can rotate sampling pipe 1c.
When the detection device is in running order, sampling mouth 1a is in face of airflow direction (dotted line in figure), with receiving pipeline 22
The gas of output.When the detection device is stopped, under the drive of driving mechanism 1b, sampling pipe 1c turns around its own axis
Dynamic (being advisable with 180 degree) so that sampling mouth 1a is back to airflow direction (solid line in figure), to avoid particulate contaminant in sampling mouth 1a
Place's deposition.Similar, under the action of driving mechanism 1b, sampling mouth 1a can also be rotated from back to airflow direction in face of air-flow
Direction.
In another optional embodiment, the sampling mechanism can include telescoping mechanism.When the detection device
During in detection state, the telescoping mechanism is in open configuration so that the mouth 1a that samples is towards the airflow direction.Work as institute
When stating detection device and being in halted state, the telescoping mechanism is in retracted mode so that the sampling mouth 1a is not towards described
Airflow direction deposits to avoid particulate contaminant at sampling mouth 1a.It can be realized of course, the sampling mechanism can be other
The moving component of the purpose of the impurity deposition in the non-monitored period at sampling mouth 1a is avoided, for example, can be flexible knot
Structure etc..
With reference to shown in Fig. 6, reflux mechanism 12 is for will be in the gas backstreaming to pipeline 22 after detection road 20 measures.It returns
The port of export of stream mechanism 12 is arranged on the sub-atmospheric pressure downstream area of diameter changing mechanism 15, the distance away from diameter changing mechanism 15 and insertion depth by
Caliber, the pipeline 22 of pipeline 22 often use the co-determinations such as the common aperture of flow velocity and diameter changing mechanism 15.The outlet for the mechanism 12 that flows back
End is arranged on the negative pressuren zone after diameter changing mechanism 15, increases the pressure differential of sampling mechanism and the mechanism 12 that flows back, enhances diameter changing mechanism 15
Antihypertensive effect.
With reference to shown in Fig. 7 a, in the present embodiment, reflux mechanism 12 can include return main, be connected to return main
On multiple reflux looped pipelines (such as three).Reflux looped pipeline circumferentially spaced can be arranged, to increase return flow line section,
Reduce 22 resistance of reflux line, impurity is avoided to deposit.With reference to shown in Fig. 7 b, in other optional embodiments, according to reality
Situation selects a reflux looped pipeline or along the multiple ports of export of cross-sectional distribution.
With reference to shown in Fig. 1, it is preferable that aerosol monitoring device 17 includes bypass 21, the bypass in the pipeline
21 is in parallel with the detection road 20, and the second control for being controlled the bypass 21 is provided on the bypass 21
Valve.Second control valve can control being turned on and off for bypass 21.When sample gas flow (i.e. pass through under normal condition
Flow after flow velocity conversion in high-pressure channel corresponding to sample) no more than flow rate set value needed for detection road 20 when, described the
Two control valves are closed.When sample gas flow, which is more than, detects the flow rate set value needed for road 20, the second control valve is opened, and it is extra to allow
Sample gas is through bypass 21.It is highly preferred that it is also provided on the bypass 21 for the flow on bypass 21
The third testing agency 8 (such as third flowmeter) being detected.The bypass 21 that the measurement of third testing agency 8 obtains
Gas flow and the second testing agency 7 measure the sum of obtained gas flow, it is possible to which obtain that sampling mechanism samples adopts
The sample gas flow of sample gas.Alternatively, the second particulate matter trap 6 is also provided on the bypass 21.Second particle
The concrete structure of object trap 6 is referred to the first particulate matter trap 5 above, is not repeated herein.Second particulate matter
Trap 6 can filter the gas into bypass 21, and particulate contaminant in gas is avoided to influence pressure reducing valve and flowmeter
Normal work；
With reference to shown in Fig. 1, in an optional embodiment, aerosol monitoring device 17 includes flow in the pipeline
Distributor 3, the flow distributor 3 have input terminal, the first output terminal and second output terminal, wherein, the flow distributor 3
Input terminal connected with the port of export of the sampling mechanism.First output terminal of the flow distributor 3 enters with detection road 20
Mouth connection.The second output terminal of the flow distributor 3 is connected with the entrance of bypass 21.Since flow distributor 3 has one
Fixed volume space, thus flow distributor 3 can make the steady air current for entering the gas on detection road 20.
With reference to shown in Fig. 1, in an optional embodiment, the sampling mechanism and the reflux mechanism 12 are wrapped respectively
Sampler valves 2 and return valve 11 are included, to control the operation of the detection device and stopping.In order to which the detection device is made to be in operation
State, the Sampler valves 2 and the return valve 11 are respectively at opening.Stop shape to be in the detection device
State, the Sampler valves 2 and the return valve 11 are respectively at off state.
With reference to shown in Fig. 1, in another optional embodiment, in the sampling mechanism and the detection road 20 respectively
It is provided with the first emptying valve 13 and the second emptying valve 14.First emptying valve 13 and second is vented valve 14 and is filled for monitoring
The pressure release in maintenance and repair is put, is also used for the cleaning to monitoring device pipeline.
Particularly, each component of aerosol monitoring device 17 is connected by high pressure resistant pipeline in the pipeline in the application, is protected
Demonstrate,prove excellent sealing.
Preferably, which also includes attemperator being set (in figure not show on signal piping and component enclosure
Go out), which can include being arranged on the insulating layer and/or electric heat tracing device on the outside of each pipeline, to avoid sample gas
Cool down after main line extraction and liquid is caused to be precipitated, influence test result；So as to ensure the temperature of the sample in measuring device
Not less than the temperature of gas in pipeline 22.
Preferably, Sampler valves 2, return valve 11, first are vented valve 13 and second and are vented valve 14 using can be long-range
The electric and pneumatic ball valve of control, the first control valve 10, the second control valve are using remote controlled electric butterfly valve, reducing
The executing agency of mechanism 15 uses electric and pneumatic mode.In addition, number of the valve with being placed in online aerosol particle diameter spectrometer 4
It is connected according to acquisition and output unit 4b, its valve state (information such as valve on or off, valve opening) is transmitted to and passes through center
Processing unit 4c, and the control signal that central processing unit 4a is sent out is received, it is operated accordingly so that in sampling pipe 1c
The requirement of the dynamic samplings such as sample tolerance satisfaction.In other optional embodiments, it is such as independently arranged detection device operation control
Unit, particulate matter detectable signal are sent to the means such as other terminal processes, can realize the utility model to 22 endoparticle of pipeline
The purpose that analyte detection and device automatically control.
The mounting means of 17 pipeline 22 of aerosol monitoring device can will be before the detection device and pipeline 22 in the pipeline
Pipeline can be convenient for disassembly and assembly by flanged joint (installation form for being similar to 22 flowmeter of pipeline) afterwards.
Monitoring method in the embodiment of the present application includes the following steps：
The flow velocity of gas in pipeline 22 under normal condition is obtained, so as to obtain the corresponding flow by detecting needed for road 20
Definite value；
Diameter changing mechanism 15 is adjusted to change the aperture of pipeline 22, so as to make the front and rear gas pressure formed of diameter changing mechanism 15
Difference；When the pressure difference value is sufficiently large, gas can overcome on-line monitoring pipeline in resistance (resistance main source be assignment of traffic
Component in room and detection road 20 and bypass 21, especially the first particulate matter trap 5 and the second particulate matter trap
6) it, by sampling mechanism and detection road 20, and is flowed back in pipeline 22 from reflux mechanism 12；
When the sample tolerance of introducing is less than the sample tolerance needed for detection, detection device will control diameter changing mechanism 15 to continue
Internal diameter is reduced, more gases is made to pass through detection device.
When sample gas flow is no more than the flow rate set value needed for road 20 is detected, the first control valve 10 fully opens, the
Two control valves are closed, and sample gas passes fully through detection road 20.
When sample gas flow, which is more than, detects the flow rate set value needed for road 20, the aperture of the first control valve 10 is adjusted, is made
The sample gas flow for detecting road 20 is equal to required flow rate set value, and the second control valve is opened, and extra sample gas is through bypass.
When the flow for entering the gas in detection road 20 is identical with the flow rate set value needed for detection road 20, to detecting road 20
Interior gas is detected.
In monitoring process, according to 22 changes in flow rate of pipeline, required sample gas tolerance variation is calculated in real time, and then feed back
The aperture of diameter changing mechanism 15, the switch of other valves or aperture etc. are controlled, realizes automatically controlling for monitoring process.Meanwhile to becoming
The setting of diameter mechanism 15 is closed the upper limit, reduces because caliber reduces excessively, causes pressure difference excessive, influences nominal gas conveying.
Detailed step in the embodiment of the present application may refer to Fig. 8.
Shown in Figure 9, the utility model embodiment also discloses a kind of 22 system of pipeline, including for being separated by filtration
Filtering separation device 18 and respectively positioned at filtering separation device 18 upstream and downstream detection device.
Wherein, two detection devices can carry out data transmission, so as in the aerosol concentration and grain size for receiving downstream point
The data of cloth and the upstream aerosol concentration and particle diameter distribution of synchronization set being separated by filtration of being monitored is calculated
Standby 18 real-time separative efficiency, and data in situ is shown or teletransmission.
In another optional embodiment, the detection device positioned at upstream and the detection device positioned at downstream can also divide
Not by its particulate matter detection data teletransmission to processing terminal, real-time separative efficiency is calculated by processing terminal.
The embodiment of the present application has the following advantages：
1st, the flow velocity for measuring gas is identical with the flow velocity under normal condition in pipeline 22, improves the accuracy of measurement；
2nd, the monitoring device can realize that on-line checking can also realize long-term monitoring；
3rd, the gas backstreaming after detecting solves the subsequent processing problem of high pressure sample gas, avoids day to former pipeline
The waste of right gas resource；
4th, sampling mechanism not object gas flow in non-detection status, so as to avoid sampling mechanism entrance in non-detection
The particulate contaminant deposition of section blocks thief hatch, and then the dust that is deposited of while avoiding detecting again is brought into detection device and makes
Into data error.
5th, aerosol grain size spectrometer 4 can cause the automatically controlling of monitoring process, high concentration alarm, really realize pipeline 22
The long-term on-line monitoring of interior aerosol concentration and particle diameter distribution.
6th, the detection device can further be extended to the separating property detection of filtering separation device 18, solve high pressure work
Under condition the actual performance of filtering separation device 18 can not long term monitoring problem.
Specific embodiment is applied in the utility model to be expounded the principle and embodiment of the utility model, with
The explanation of upper embodiment is merely used to help understand the method and its core concept of the utility model；Meanwhile for this field
Those skilled in the art, according to the thought of the utility model, there will be changes, comprehensive in specific embodiments and applications
Upper described, the content of the present specification should not be construed as a limitation of the present invention.
Claims (13)
1. a kind of aerosol monitoring device in pipeline, which is characterized in that including：
Diameter changing mechanism, the diameter changing mechanism can control the aperture of the pipeline；
Road is detected, the detection road is provided with for the survey to being tested by the aerosol concentration in it and particle diameter distribution
Measure device；
Sampling mechanism, the arrival end of the sampling mechanism is connected with the pipeline positioned at the diameter changing mechanism upstream, described to adopt
The port of export of model machine structure is connected with the entrance on the detection road；
Flow back mechanism, and the port of export of the reflux mechanism is connected with the pipeline positioned at the diameter changing mechanism downstream, described time
Flow the arrival end of mechanism and the outlet on the detection road；
First testing agency, first testing agency are used to be detected the gas in pipeline；
Second testing agency, second testing agency are used to be detected the gas in detection road；
First control valve, first control valve are used to control the gas in the detection road.
2. aerosol monitoring device in pipeline according to claim 1, which is characterized in that the diameter changing mechanism includes multiple
The wedge shaped baffle along the circumferential direction arranged, each wedge shaped baffle is rotatablely connected by adjusting fulcrum with swing-around trajectory, described
Diameter changing mechanism further includes the rotary shaft that is arranged on pipe side wall and can be rotated around its own axis, the rotary shaft and the rotation
Transition road is sequentially connected, so as to enable the swing-around trajectory circumferentially rotated.
3. aerosol monitoring device in pipeline according to claim 1, which is characterized in that the detection road is additionally provided with
First particulate matter trap, the filtering accuracy of first particulate matter trap should be greater than or equal to 0.3 microns.
4. aerosol monitoring device in pipeline according to claim 1, which is characterized in that the sampling mechanism includes a fortune
Dynamic component, so that towards the gas in pipeline when the opening of sampling pipe aerosol monitoring device in the pipeline is in detection state
The flow direction of body, and when can make the opening of the sampling pipe aerosol monitoring device being in non-detection status in the pipeline
Not towards the flow direction of the gas in pipeline.
5. aerosol monitoring device in pipeline according to claim 1, which is characterized in that the sampling mechanism includes plugging
In the sampling pipe of the pipe side wall and driving mechanism for driving sampling pipe rotation, the driving mechanism can make described
Towards the flowing side of the gas in pipeline when the opening of sampling pipe aerosol monitoring device in the pipeline is in detection state
To, and when can make the opening of the sampling pipe aerosol monitoring device being in non-detection status in the pipeline in pipeline
Gas flow direction.
6. aerosol monitoring device in pipeline according to claim 1, which is characterized in that aerosol monitoring in the pipeline
Device includes bypass, and the bypass is in parallel with the detection road, is provided on the bypass for the bypass
The second control valve controlled.
7. aerosol monitoring device in pipeline according to claim 6, which is characterized in that aerosol monitoring in the pipeline
Device includes flow distributor, and the flow distributor has input terminal, the first output terminal and second output terminal, wherein, it is described
The input terminal of flow distributor is connected with the port of export of the sampling mechanism, the first output terminal and the detection of the flow distributor
The entrance connection on road, the second output terminal of the flow distributor are connected with the entrance of bypass.
8. aerosol monitoring device in pipeline according to claim 1, which is characterized in that first testing agency includes
The differential pressure transmitter that pressure differential at the entrance and exit of the diameter changing mechanism can be detected.
9. aerosol monitoring device in pipeline according to claim 1, which is characterized in that the sampling mechanism and described time
Stream mechanism respectively includes Sampler valves and return valve, to control the operation and stopping of aerosol monitoring device in the pipeline.
10. aerosol monitoring device in pipeline according to claim 1, which is characterized in that the sampling mechanism and described
Detection road is respectively arranged with the first emptying valve and the second emptying valve.
11. aerosol monitoring device in pipeline according to claim 1, which is characterized in that aerosol monitoring in the pipeline
Device further includes an attemperator, and the temperature which is used to make the sample in measuring device is not less than gas in pipelines
Temperature.
12. aerosol monitoring device in pipeline according to claim 1, which is characterized in that aerosol monitoring in the pipeline
Device further includes the control unit for being controlled aerosol monitoring device in the pipeline, the control unit and the measurement
Device is integrally disposed or, the control unit is independently arranged.
13. a kind of pipe-line system, which is characterized in that including filtering separation device and be arranged on the filtering separation device upstream
With aerosol monitoring device in any one of them pipeline of downstream such as claim 1 to 12.
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| CN201721426683.2U CN207570973U (en) | 2017-10-31 | 2017-10-31 | Aerosol monitoring device and pipe-line system in pipeline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727541A (en) * | 2017-10-31 | 2018-02-23 | 中国石油大学(北京) | Aerosol monitoring device and method and pipe-line system in pipeline |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727541A (en) * | 2017-10-31 | 2018-02-23 | 中国石油大学(北京) | Aerosol monitoring device and method and pipe-line system in pipeline |
| CN107727541B (en) * | 2017-10-31 | 2023-08-08 | 中国石油大学(北京) | Device and method for monitoring aerosol in pipeline and pipeline system |
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