CN104316113B - Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays - Google Patents
Gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays Download PDFInfo
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- CN104316113B CN104316113B CN201410668785.XA CN201410668785A CN104316113B CN 104316113 B CN104316113 B CN 104316113B CN 201410668785 A CN201410668785 A CN 201410668785A CN 104316113 B CN104316113 B CN 104316113B
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Abstract
The invention provides a gas-solid multiphase flow online measurement device and method based on arc-shaped electrostatic electrode arrays in the field of industrial gas-solid multiphase flow tests. The measurement device comprises the arc-shaped electrostatic electrode arrays, a first metal electrode set and a second metal electrode set are sequentially arranged in the inner circumferential face of each arc-shaped electrostatic electrode array side by side, first metal electrodes and second metal electrodes are each in the shape of an arc, and the axial width of each first metal electrode is smaller than that of each second metal electrode. The invention further relates to the measurement method based on the measurement device. According to the method, the speed and the flowing stability of solid phase powder are measured through the high sensitivity of the first metal electrodes and the bandwidth, and the solid phase power mass flow rate is measured through the large sensitive areas of the second metal electrodes and the space filtering effect. The device and method have the advantages that on-site implementation is convenient, measurement is accurate and reliable, the measurable range is large, the using time is long, and maintenance is convenient, and the device and method can be widely applied to continuous online monitoring of industrial pneumatic solid phase powder conveying.
Description
Art
The invention belongs to Dual-Phrase Distribution of Gas olid measuring technology scope, particularly to a kind of gas-solid multiphase flow on-line measurement device and method based on arc electrostatic attraction electrode array.
Background technology
Gas-solid multiphase flow is widely present in the middle of Pneumatic conveying pipeline, admittedly the material essential industry production process such as fluid bed and exhaust emissions.Solid phase powder body flowing gas drive under motion conditions for optimized production process, improve production efficiency and ensure that safety in production has great importance.Traditional single phase fluid measurement method based on stress and throttle style is not particularly suited for industry gas-particle two-phase or the measurement of multiphase flow.Electric capacity, optics, lonizing radiation, conduction of heat, digital image and acoustic technique are easily subject to the impact of solid phase powder property and environmental condition, thus are difficult in the commercial production that operating mode is changeable long-term use reliably.
Electrostatic Measurement technology is strong with its adaptability for working condition, passive measurement (noenergy injection fluid), install easy, easy to maintenance, simple in construction and the advantage such as cheap and have wide prospects for commercial application.The electrostatic measurement apparatus using intrusive mood electrode can occur wear to electrodes, the interference problem such as solid phase powder flowing and production safety, is not suitable for commercial Application.Arc and annular electrode produce impact all without fluid flow, it is to avoid the problems such as the abrasion of life-time service, can meet industrial requirement.Relative to annular electrode, the electrostatic measuring probe of arc-shaped electrode is used to have structure simpler compact, easy for installation, very little maintenance, the cheap and advantage of the high aspect of area sensitive degree.
For the deficiency overcoming the most air conveying solid phase powder measurement device to exist, the present invention proposes a kind of gas-solid multiphase flow on-line measurement device and method based on arc electrostatic attraction electrode array.Complexity and the time variation of commercial production operating mode in view of the motion of solid phase powder body, use multiple electrode composition arc electrostatic attraction electrode array can obtain many groups measurement result of local solid powder body, several arc electrostatic attraction electrode arrays are installed in same pipeline section cross section and more can realize multimetering, improve reliability and the accuracy of whole measurement device.The present invention has the advantages such as accuracy of measurement height, reliable operation, measurement wide ranges, simple in construction, easy for installation and maintenance are few, it is widely used in the daily monitoring of industrial air solid phase powder mixture flow parameter, and provides reliable scientific basis for on-line tuning manufacturing parameter and optimized production process.
Summary of the invention
Brief overview about the present invention given below, in order to the basic comprehension about certain aspects of the invention is provided.Should be appreciated that this general introduction is not that the exhaustive about the present invention is summarized.It is not intended to determine the key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its purpose is only to provide some concept in simplified form, in this, as the preamble in greater detail discussed after a while.
It is an object of the invention to provide a kind of gas-solid multiphase flow on-line measurement device and method based on arc electrostatic attraction electrode array.
First aspect, the present invention relates to a kind of gas-solid multiphase flow on-line measurement device based on arc electrostatic attraction electrode array, including:
Arc electrostatic attraction electrode array (
1
), for measuring the electrostatic fluctuation signal that local charged solid phase powder body motion causes；Described arc electrostatic attraction electrode array (
1
) the first metal electrode described in a group that is sequentially arranged side by side on inner peripheral surface (
2
) and the second metal electrode described in a group (
3
), wherein said first metal electrode (
2
) at least
3
Individual, described second metal electrode (
3
) at least
1
Individual；Described first metal electrode (
2
) and described second metal electrode (
3
) it is arcuation, center of circle subtended angle is by institute
1
°
-180
°；Described first metal electrode (
2
) axial width be
1-10mm
, described second metal electrode (
3
) axial width be
5-100mm
, and described first metal electrode (
2
) axial width less than described second metal electrode (
3
) axial width；Described first metal electrode (
2
) and described second metal electrode (
3
) radial thickness be
1-10mm
, described radial direction is for being perpendicular to the fluid direction of motion, described axially for being parallel to the fluid direction of motion；Described first metal electrode (
2
Distance between) is
10-50mm
, described second metal electrode (
3
Distance between) is
20-100mm
, described second metal electrode (
3
) with adjacent described first metal electrode (
2
) distance be
20-200mm
；Electrostatic signal by with described first metal electrode (
2
) and described second metal electrode (
3
) be joined directly together metal connection post (
10
) draw；Described first metal electrode (
2
) and described second metal electrode (
3
) and described arc electrostatic attraction electrode array (
1
) between base metal material by insulant (
11
) carry out electrical isolation, described metal connection post (
10
) and described arc electrostatic attraction electrode array (
1
) between base metal material by described insulant (
11
) carry out electrical isolation, and by metallic shield cover plate (
9
) shielding outside electromagnetic interference；Described arc electrostatic attraction electrode array (
1
) and embedded digital signal processing unit interconnect；Be installed on described Pneumatic conveying pipeline (
4
) same pipeline section cross section described arc electrostatic attraction electrode array (
1
) quantity is
1-18
Individual, each described arc electrostatic attraction electrode array (
1
) by flange be fixed on described Pneumatic conveying pipeline (
4
) metal base (
8
On), and embed described Pneumatic conveying pipeline (
4
) outer wall, its inner surface and described Pneumatic conveying pipeline (
4
) inner surface is concordant；
Embedded real-time signal processing unit (
5
), to described arc electrostatic attraction electrode array (
1
) measure the electrostatic signal that obtains and nurse one's health and process；Described Embedded real-time signal processing unit (
5
) and described arc electrostatic attraction electrode array (
1
) be connected by shielded cable, the electrostatic signal of input is carried out electric current
/
Voltage conversion, amplify and be converted to digital signal after Filtering Processing, and utilize the first metal electrode (
2
) measure the time domain of signal and frequency domain character is analyzed to identification solid phase powder body flow pattern, utilize multichannel computing cross-correlation to obtain the data such as multiple speed and signal cross-correlation coefficient simultaneously and carry out data fusion, obtain the flowing velocity of solid phase powder body and flow stability parameter, so combine described second metal electrode (
3
) measure the time domains such as the meansigma methods of signal and root-mean-square or frequency domain character calculates solid phase powder quality flow parameter；
Centralized control unit (
6
), for arc electrostatic attraction electrode array described at least one on same pipeline section cross section (
1
) data that obtain are weighted the mean motion parameter that averagely obtains solid phase powder body at whole pipeline section, carry out display and the record in real time of data simultaneously；And according to monitoring result and working conditions change to described Embedded real-time signal processing unit (
5
) running parameter carry out real-time regulating allocation；Described centralized control unit (
6
) measurement data that exports by Field Monitoring System (
7
) receive, and then it is capable of monitoring in real time or regulation control of solid phase powder flowing situation.
Second aspect, the invention still further relates to a kind of based on arc electrostatic attraction electrode array (
1
) gas-solid multiphase flow On-line Measuring Method, mainly comprise the steps:
Step
1
, arc electrostatic attraction electrode array (
1
) obtain the electrostatic fluctuation signal that local solid powder flowing causes；
Step
2
, Embedded real-time signal processing unit (
5
) receive described arc electrostatic attraction electrode array (
1
) electrostatic signal that obtains, and signal is nursed one's health and is converted into the digital signal meeting the process requirement of embedded digital processor, then by cross-correlation Computational Method of Velocity Measurement calculating multiple flowing velocities of solid phase powder body, fluid stable degree and solid phase powder quality flow information；Described signal condition is through overcurrent by electrostatic signal
/
Voltage is simulated after changing, amplify and filter link
/
Digital signal is changed；
Step
3
, Embedded real-time signal processing unit (
5
) the local solid powder flowing information that primary Calculation obtained carries out screening and weighted average, and carry out confidence judgement according to the historical measurement data of described solid phase flowing velocity and mass flow, elimination system and measurement error, then process the acquisition flowing velocity of local solid powder body, mass flow and the fusion results of flowing degree of stability by the moving average of data；
Step
4
, Embedded real-time signal processing unit (
5
) data that export by described centralized control unit (
6
) receive, described centralized control unit (
6
) arc electrostatic attraction electrode array described at least one on same pipeline section cross section (
1
) data that obtain are weighted the mean motion parameter that averagely obtains solid phase powder body at whole pipeline section, carry out display and the record in real time of data simultaneously；And according to monitoring result and working conditions change to described Embedded real-time signal processing unit (
5
) running parameter carry out real-time regulating allocation；Described centralized control unit (
6
) measurement data that exports by Field Monitoring System (
7
) receive, and then it is capable of monitoring in real time or regulation control of solid phase powder flowing situation.
The present invention has a following beneficial effect:
Assembly of the invention can to Pneumatic conveying pipeline in commercial production (
4
In), the flowing velocity of solid phase powder body, mass flow and flow stability are monitored in real time；
The present invention by arc electrostatic attraction electrode array (
1
), Embedded real-time signal processing unit (
5
) and centralized control unit (
6
) etc. realize, wherein arc electrostatic attraction electrode array (
1
) the measurement electrostatic fluctuation signal that locally motion of charged solid phase powder body causes, Embedded real-time signal processing unit (
5
) electrostatic signal nursed one's health and processes, and merged by Multi-parameter data and obtain the flowing velocity of solid phase powder body, mass flow and fluid stable degree, centralized control unit (
6
) by fieldbus receive Embedded real-time signal processing unit (
5
) data that export, to its carry out post processing, comprehensively analyze, show, record and in real time configuration Embedded real-time signal processing unit (
5
) running parameter, and send Monitoring Data in real time to industrial site monitoring system；
The present invention designs for non-intrusion type, does not disturb solid phase powder flowing situation, and volume is little, lightweight, it is simple to industry spot is installed, and maintenance workload is few；
The present invention use multiple arc electrostatic attraction electrode array (
1
) can realize multiple dispersion Pneumatic conveying pipeline (
4
The measurement of comparison of solid phase powder flowing parameter in), be particularly suited for needing quantitatively allocating solid phase powder body multiple Pneumatic conveying pipelines (
4
The production process of flow parameter in), has that construction is simple, small investment, an advantage such as safe and reliable.
Accompanying drawing explanation
Below with reference to the accompanying drawings illustrate embodiments of the invention, the above and other objects, features and advantages of the present invention can be more readily understood that.Parts in accompanying drawing are intended merely to illustrate the principle of the present invention.In the accompanying drawings, same or similar technical characteristic or parts will use same or similar reference to represent.
Figure
1
Be the embodiment of the present invention provide based on arc electrostatic attraction electrode array (
1
) the structural representation of gas-solid multiphase flow on-line measurement device.
Figure
2
Be the embodiment of the present invention provide be arranged on circular cross-section Pneumatic conveying pipeline (
4
Arc electrostatic attraction electrode array on) (
1
) axial cross-sectional views.
Figure
3
It it is figure
2
Shown arc electrostatic attraction electrode array (
1
) radial section generalized section.
Description of reference numerals: arc electrostatic attraction electrode array (
1
), the first metal electrode (
2
), the second metal electrode (
3
), Pneumatic conveying pipeline (
4
), Embedded real-time signal processing unit (
5
), centralized control unit (
6
), Field Monitoring System (
7
), metal base (
8
), metallic shield cover plate (
9
), metal connection post (
10
), insulant (
11
), signal leading-out terminal (
12
).
Detailed description of the invention
Embodiments of the invention are described with reference to the accompanying drawings.Element and feature described in the accompanying drawing of the present invention or a kind of embodiment can combine with the element shown in one or more other accompanying drawing or embodiment and feature.It should be noted that, for purposes of clarity, accompanying drawing and explanation eliminate unrelated to the invention, parts known to persons of ordinary skill in the art and the expression of process and description.
Embodiment
1
The present embodiment provide a kind of based on arc electrostatic attraction electrode array (
1
) gas-solid multiphase flow on-line measurement device.Figure
1
Be the embodiment of the present invention provide based on arc electrostatic attraction electrode array (
1
) the structural representation of gas-solid multiphase flow on-line measurement device.By scheming
1
Understand:
The present embodiment provide based on arc electrostatic attraction electrode array (
1
) gas-solid multiphase flow on-line measurement device, including arc electrostatic attraction electrode array (
1
), Embedded real-time signal processing unit (
5
) and centralized control unit (
6
) etc..Described arc electrostatic attraction electrode array (
1
) the first metal electrode described in a group that is sequentially arranged side by side on inner peripheral surface (
2
) and the second metal electrode described in a group (
3
).Described first metal electrode (
2
) and described second metal electrode (
3
) it is arcuation, center of circle subtended angle is by institute
1
°
-180
°.Described first metal electrode (
2
) axial width less than described second metal electrode (
3
) axial width.Described second metal electrode (
3
) for solid phase powder quality flow measurement, described first metal electrode (
2
) measure for solid phase powder flow rate, and play the effect of subsidiary mass flow.Described first metal electrode (
2
) axially sensitizing range narrow, be beneficial to accurately measure solid phase powder flowing speed, described second metal electrode (
3
) axially sensitizing range big, be beneficial to accurately measure solid phase powder concentration.
As preferably, described arc electrostatic attraction electrode array (
1
) be sequentially arranged side by side at least on inner peripheral surface
3
Individual described first metal electrode (
2
), to obtain multiple signals for multi-data fusion.
As preferably, described first metal electrode (
2
) axial width is
1-10mm
, to ensure the sensitivity of solid phase powder body signal measurement, it is to avoid Spatial Filtering Effect；Described second metal electrode (
3
) axial width be
5-100mm
, to ensure enough sensitizing range scopes and space filtering effect；Described first metal electrode (
2
) and described second metal electrode (
3
) radial thickness be
1-10mm
, to ensure tolerance intensity and the hypersensitivity of electrode；Described radial direction is for being perpendicular to the fluid direction of motion, described axially for being parallel to the fluid direction of motion.
As preferably, described first metal electrode (
2
Distance between) is
10-50mm
, to adapt to the accurate measurement of different in flow rate solid phase powder body；Described second metal electrode (
3
Distance between) is
20-100mm
, to eliminate the overlap of sensitivity field；Described first metal electrode (
2
) with adjacent second metal electrode (
3
) distance be
20-200mm
, with avoid described first metal electrode (
2
) and described second metal electrode (
3
) mutual inductance effect between sensitivity field.
As preferably, be installed on described Pneumatic conveying pipeline (
4
) same pipeline section cross section described arc electrostatic attraction electrode array (
1
) quantity is
1-12
Individual；Each described arc electrostatic attraction electrode array (
1
) by flange be fixed on described Pneumatic conveying pipeline (
4
) described metal base (
8
On), and embed described Pneumatic conveying pipeline (
4
) outer wall, its inner surface and described Pneumatic conveying pipeline (
4
) inner surface is concordant.
Figure
2
Be the embodiment of the present invention provide be arranged on circular cross-section Pneumatic conveying pipeline (
4
Arc electrostatic attraction electrode array on) (
1
) axial cross-sectional views, figure
3
It it is figure
2
Shown arc electrostatic attraction electrode array (
1
) the radial section generalized section installed.By scheming
2
And figure
3
Understand,
As preferably, described Pneumatic conveying pipeline (
4
On), size cuts out installing port as requested, and by described metal base (
8
) it is welded in incision；Described arc electrostatic attraction electrode array (
1
) load described metal base (
8
), it is ensured that its inner surface and described Pneumatic conveying pipeline (
4
) internal diameter consistent；Described arc electrostatic attraction electrode array (
1
) by
3
The axial width of individual equidistant arrangement is
4mm
Described first metal electrode (
2
) and
1
Individual axial width is
20mm
Described second metal electrode (
3
) composition, its radial thickness is
4mm
, central angle is by institute
15
°；Described first metal electrode (
2
) with adjacent described second metal electrode (
3
) distance be
30mm
；
As preferably, electrostatic signal by with described first metal electrode (
2
) and described second metal electrode (
3
) be joined directly together described metal connection post (
10
) draw.
3
Individual described first metal electrode (
2
) and
1
Individual described second metal electrode (
3
) and described arc electrostatic attraction electrode array (
1
) between base metal material by described insulant (
11
) carry out electrical isolation；Described metal connection post (
10
) and described arc electrostatic attraction electrode array (
1
) between base metal material by described insulant (
11
) carry out electrical isolation, and by described metallic shield cover plate (
9
) shielding outside electromagnetic interference；Described arc electrostatic attraction electrode array (
1
) and described Embedded real-time signal processing unit (
5
) interconnect；
As preferably, Embedded real-time signal processing unit (
5
) and described arc electrostatic attraction electrode array (
1
) be connected by shielded cable, by the electrostatic signal of input through resistance
/
Capacitance network is reconverted into digital signal after being converted to voltage signal, amplification and Filtering Processing, and utilize described first metal electrode (
2
) measure the time domain of signal and frequency domain character is analyzed to identification solid phase powder body flow pattern, utilize multichannel computing cross-correlation to obtain the data such as multiple speed and signal cross-correlation coefficient simultaneously and carry out data fusion, obtain the flowing velocity of solid phase powder body and flow stability parameter, so combine described second metal electrode (
3
) measure the time domains such as the meansigma methods of signal and root-mean-square or frequency domain character calculates solid phase powder quality flow parameter；
As preferably, centralized control unit (
6
) carry out the method optimization flowing velocity of solid phase powder body, mass flow and the solid phase powder flowing degree of stability such as confidence distribution judgement, weighted average and Kalman filtering based on historical measurement data, carry out display and the record in real time of data simultaneously；And according to monitoring result and working conditions change to described Embedded real-time signal processing unit (
5
) running parameter carry out real-time regulating allocation；Described centralized control unit (
6
) measurement data that exports by Field Monitoring System (
7
) receive, and then it is capable of monitoring in real time or regulation control of solid phase powder flowing situation.
Embodiment
2
The present embodiment provides a kind of gas-solid multiphase flow On-line Measuring Method based on arc electrostatic attraction electrode array, mainly comprises the steps:
Step
1
, arc electrostatic attraction electrode array (
1
) obtain the electrostatic fluctuation signal that local solid powder flowing causes；
Step
2
, Embedded real-time signal processing unit (
5
) and described arc electrostatic attraction electrode array (
1
) be connected by shielded cable, by the electrostatic signal of input through resistance
/
Capacitance network is reconverted into digital signal after being converted to voltage signal, amplification and Filtering Processing；
Step
3
, Embedded real-time signal processing unit (
5
) utilize described first metal electrode (
2
) measure the time domain of signal and frequency domain character is analyzed to identification solid phase powder body flow pattern, utilize multichannel computing cross-correlation to obtain the data such as multiple speed and signal cross-correlation coefficient simultaneously and carry out data fusion, obtain the flowing velocity of solid phase powder body and flow stability parameter, so combine described second metal electrode (
3
) measure the time domains such as the meansigma methods of signal and root-mean-square or frequency domain character calculates solid phase powder quality flow parameter；
Step
4
, centralized control unit (
6
) carry out the methods such as confidence distribution judgement, weighted average and Kalman filtering based on historical measurement data and optimize the flowing velocity of solid phase powder body, mass flow and solid phase powder flowing degree of stability and carry out display and the record in real time of data simultaneously；And according to monitoring result and working conditions change to described Embedded real-time signal processing unit (
5
) running parameter carry out real-time regulating allocation；Described centralized control unit (
6
) measurement data that exports by Field Monitoring System (
7
) receive, and then it is capable of monitoring in real time or regulation control of solid phase powder flowing situation.
Use standard
CAN
Bus protocol, can make described centralized control unit (
6
) receive at most
255
Individual described arc electrostatic attraction electrode array (
1
) measurement data, and realize all measurement results are comprehensively analyzed simultaneously, display and data record in real time；In real time configuration and each described arc electrostatic attraction electrode array (
1
) be connected described Embedded real-time signal processing unit (
5
) running parameter；And by data transfer to described Field Monitoring System (
7
)；Described centralized control unit (
6
) and Field Monitoring System (
7
Can pass through between) hardwire,
Ethernet
、
OPC
、
Modbus
、
CAN
、
TCP/RTU
Or
RS485
Communication is realized Deng various ways.
Assembly of the invention can monitor in real time in commercial production solid phase powder body Pneumatic conveying pipeline (
4
Speed, mass flow and flowing degree of stability information in).The present invention by arc electrostatic attraction electrode array (
1
), Embedded real-time signal processing unit (
5
) and centralized control unit (
6
) etc. realize, wherein arc electrostatic attraction electrode array (
1
) be made up of the arc electrostatic attraction electrode array of two groups of axially different width, for measuring the fluctuation information of charged solid phase powder body, described Embedded real-time signal processing unit (
5
) nurse one's health and carry out multiple signals related operation and multi-data fusion to measuring signal, thus draw the flow parameter of solid phase powder body, measurement result by fieldbus be sent to described centralized control unit (
6
) carry out showing, record, and realize with described Field Monitoring System (
7
) communication.Its dominant motion parameters can be monitored in the case of not disturbing solid phase powder flowing by the method for the present invention in real time, and accuracy height, reliable operation, measurement wide ranges, simple in construction, easy for installation and maintenance is few, is widely used in industrial air
/
The daily monitoring of solid phase powder mixture flow parameter, and provide reliable scientific basis for on-line tuning manufacturing parameter and optimized production process.The present invention use multiple described arc electrostatic attraction electrode array (
1
) can realize multiple dispersion Pneumatic conveying pipeline (
4
The measurement of comparison of solid phase powder flowing parameter in), be particularly suited for needing quantitatively allocating solid phase powder body multiple Pneumatic conveying pipelines (
4
The production process of flow parameter in), has that construction is simple, small investment, an advantage such as safe and reliable.
Last it is noted that above example is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1.A kind of gas-solid multiphase flow on-line measurement device based on arc electrostatic attraction electrode array, including arc electrostatic attraction electrode array ( 1 ), Embedded real-time signal processing unit ( 5 ), centralized control unit ( 6 ) and production scene monitoring system ( 7 ):
Described arc electrostatic attraction electrode array (
1
) the measurement electrostatic fluctuation signal that locally motion of charged solid phase powder body causes, described arc electrostatic attraction electrode array (
1
) one group of first metal electrode that be sequentially arranged side by side on inner peripheral surface (
2
) and one group of second metal electrode (
3
), described first metal electrode (
2
) axial width less than described second metal electrode (
3
) axial width；
Described Embedded real-time signal processing unit (
5
) and described arc electrostatic attraction electrode array (
1
) be connected by shielded cable, for conditioning and the process of electrostatic fluctuation signal, and utilize described first metal electrode (
2
) signal measured calculates flowing velocity and the flowing degree of stability of local solid powder body, in combination with described second metal electrode (
3
) signal measured calculates the mass flow of local solid powder body；
Described centralized control unit (
6
) by fieldbus receive described Embedded real-time signal processing unit (
5
) data that export, data are carried out post processing, comprehensive analyze, display and record, and simultaneously to described Embedded real-time signal processing unit (
5
) configure in real time；
Described production scene monitoring system (
7
) receive described centralized control unit (
6
) the solid phase powder flowing parameter that sends.
2.According to claim 1 Described gas-solid multiphase flow on-line measurement device, it is characterised in that described first metal electrode ( 2 ) at least 3 Individual, described second metal electrode ( 3 ) at least 1 Individual.
3.According to claim 1 Described gas-solid multiphase flow on-line measurement device, it is characterised in that described first metal electrode ( 2 ) and the second metal electrode ( 3 ) it is arcuation, center of circle subtended angle is by institute 1 ° -180 °。
4.According to claim 1 Described gas-solid multiphase flow on-line measurement device, it is characterised in that described first metal electrode ( 2 ) axial width is 1-10mm ；Described second metal electrode ( 3 ) axial width be 5-100mm ；Described first metal electrode ( 2 ) and described second metal electrode ( 3 ) radial thickness be 1-10mm 。
5.According to claim 1 Described gas-solid multiphase flow on-line measurement device, it is characterised in that described first metal electrode ( 2 Distance between) is 10-50mm , described second metal electrode ( 3 Distance between) is 20-200mm , described first metal electrode ( 2 ) with described adjacent second metal electrode ( 3 ) distance be 20-200mm 。
6.According to claim 1 Described gas-solid multiphase flow on-line measurement device, it is characterised in that described first metal electrode ( 2 ) and described second metal electrode ( 3 ) and described arc electrostatic attraction electrode array ( 1 ) metal master between by insulant ( 11 ) realize electrical isolation protection；Described arc electrostatic attraction electrode array ( 1 ) metal master and metallic shield cover plate ( 9 ) ground connection constitute to described first metal electrode ( 2 ) and described second metal electrode ( 3 ) shielding space.
7.According to claim 1 Described gas-solid multiphase flow on-line measurement device, it is characterised in that be installed on Pneumatic conveying pipeline ( 4 ) same pipeline section cross section described arc electrostatic attraction electrode array ( 1 ) quantity is 1-18 Individual；Each described arc electrostatic attraction electrode array ( 1 ) by flange be fixed on described Pneumatic conveying pipeline ( 4 ) metal base ( 8 On), and embed described Pneumatic conveying pipeline ( 4 ) outer wall, its inner surface and described Pneumatic conveying pipeline ( 4 ) inner surface is concordant.
8.According to claim 1 Described gas-solid multiphase flow on-line measurement device, it is characterised in that the conditioning of described electrostatic fluctuation signal and process, is that electrostatic signal is carried out electric current / Digital signal is converted to after voltage conversion, amplification and Filtering Processing；The described flowing velocity calculating local solid powder body and flowing degree of stability, be utilize described first metal electrode ( 2 ) measure the time domain of signal and frequency domain character is analyzed to identification solid phase powder body flow pattern, and utilize multichannel computing cross-correlation to obtain the data such as multiple speed and signal cross-correlation coefficient to carry out data fusion, it is thus achieved that the flowing velocity of solid phase powder body and flow stability parameter；The described mass flow calculating local solid powder body, be combine described first metal electrode ( 2 ) measurement signal and the second metal electrode ( 3 ) measure the time domains such as the meansigma methods of signal and root-mean-square or frequency domain character calculates solid phase powder quality flow parameter.
9.According to claim 1 Described gas-solid multiphase flow on-line measurement device, it is characterised in that described centralized control unit ( 6 ), on same pipeline section cross section described arc electrostatic attraction electrode array ( 1 ) data that obtain are weighted the mean motion parameter that averagely obtains solid phase powder body at whole pipeline section, carry out display and the record in real time of data simultaneously；And according to monitoring result and working conditions change to described Embedded real-time signal processing unit ( 5 ) running parameter carry out real-time regulating allocation；Described centralized control unit ( 6 ) measurement data that exports by production scene monitoring system ( 7 ) receive, it is advantageously implemented monitoring in real time or regulation control of solid phase powder flowing situation.
10.A kind of gas-solid multiphase flow On-line Measuring Method based on arc electrostatic attraction electrode array, it is characterised in that mainly comprise the steps:
Step
1
, multiple claim
1-9
Arc electrostatic attraction electrode array described in any one (
1
) obtain the electrostatic fluctuation signal that local solid powder flowing causes；
Step
2
, Embedded real-time signal processing unit (
5
) receive described arc electrostatic attraction electrode array (
1
) electrostatic signal that obtains, and signal nursed one's health and is converted into and meet embedded dsp and process the digital signal required, then multiple flowing velocities of solid phase powder body, fluid stable degree, and solid phase powder quality flow information are calculated by cross-correlation Computational Method of Velocity Measurement；Described signal condition is through overcurrent by electrostatic signal
/
Voltage is simulated after changing, amplify and filter link
/
Digital signal is changed；
Step
3
, Embedded real-time signal processing unit (
5
) the local solid powder flowing feature that primary Calculation obtained carries out meteor trail echoes, data screening and weighted average, and carry out confidence judgement according to described solid phase powder body historical measurement data, elimination system and measurement error, then process the acquisition flowing velocity of local solid powder body, mass flow and the fusion results of flowing degree of stability by the moving average of data；
Step
4
, described Embedded real-time signal processing unit (
5
) data that export by described centralized control unit (
6
) receive, described centralized control unit (
6
) on same pipeline section cross section at least one arc electrostatic attraction electrode array (
1
) data that obtain are weighted the mean motion parameter that averagely obtains solid phase powder body at whole pipeline section, carry out display and the record in real time of data simultaneously；And according to monitoring result and working conditions change to described Embedded real-time signal processing unit (
5
) running parameter carry out real-time regulating allocation；Described centralized control unit (
6
) measurement data that exports by Field Monitoring System (
7
) reception, auxiliary realizes monitoring in real time or regulation control of solid phase powder flowing situation.
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| CN105628571A (en) * | 2016-03-29 | 2016-06-01 | 华北电力大学 | Fluidized bed mixed particle detection device and method based on electrostatic and photoelectric sensor |
| CN106295569A (en) * | 2016-08-11 | 2017-01-04 | 济南大学 | A kind of recognition methods of Dense Phase Pneumatic Conveying two phase flow pattern |
| CN106443055A (en) * | 2016-08-31 | 2017-02-22 | 西安艾贝尔科技发展有限公司 | Coil-type wind powder online measuring system and method |
| CN107389972B (en) * | 2017-07-18 | 2020-05-22 | 北京华电天仁电力控制技术有限公司 | Analyzer for on-line measuring boiler pipeline air-powder flow parameter |
| CN109283255B (en) * | 2018-08-06 | 2020-05-22 | 浙江大学 | Detection method of conveying flow pattern in pneumatic conveying process |
| CN108931664A (en) * | 2018-09-03 | 2018-12-04 | 南京科远自动化集团股份有限公司 | First air on-line parameter measuring system and measurement method |
| CN111781114A (en) * | 2020-07-09 | 2020-10-16 | 南京大得科技有限公司 | Device and method for detecting concentration and speed of gas-solid two-phase flow |
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| CN102854332B (en) * | 2012-09-17 | 2014-05-21 | 华北电力大学 | Device and method for measuring rotational speed on basis of electrostatic sensor array and data fusion |
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