CN109540233A - Speed, the measurement method and device of density and flow of pneumatic conveying solid material - Google Patents
Speed, the measurement method and device of density and flow of pneumatic conveying solid material Download PDFInfo
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- CN109540233A CN109540233A CN201811576983.8A CN201811576983A CN109540233A CN 109540233 A CN109540233 A CN 109540233A CN 201811576983 A CN201811576983 A CN 201811576983A CN 109540233 A CN109540233 A CN 109540233A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
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Abstract
The invention belongs to field of measuring technique, and in particular to the graininess of pneumatic conveying or speed, density and the flow-measuring method and device of pulverulent solids material.The present invention show that same fluidised form flows through the transition time of default spacing in measurement pipe (chamber) by electric field signal variation, and the movement velocity of solid material is obtained with " spacing ÷ transition time "；The space filling proportion that measurement pipe (chamber) interior solid material is obtained by electric field signal variation, the suspension density of solid material is obtained with " solid material space filling proportion × solid material bulk density "；The flow of measurement pipe (chamber) interior solid material is obtained by " movement velocity × solid material space filling proportion × solid material bulk density × measurement pipe (chamber) cross-sectional area " again.Measurement method and device of the invention can accurately measure the solid particulate matter of pneumatic conveying in pipeline or flowing velocity, concentration and the real-time traffic of powdered substance with safety, economy, reliable way.
Description
Technical field
The invention belongs to field of measuring technique, and in particular to the graininess of pneumatic conveying or the speed of pulverulent solids material
The measurement method and device of degree, density and flow.
Background technique
In commercial plant (such as dry coal powder gasification device, blast furnace), usually conveyed in the duct using strength
Granular or powdered solid material (such as coal dust, alumina powder), need to the movement velocity of the solid material of conveying and
The progress such as flow in real time, accurately measure, to meet the requirement of controlling of production process.For the particulate matter of pneumatic conveying in pipeline
Or the flow measurement of powdered solid material, the movement velocity and density for measuring solid material respectively are generallyd use, with " flow
The mode of=movement velocity × density × conduit cross-sectional area " calculates its real-time traffic.
In general, tachometric survey has following several implementations:
One, electrostatic charge signalling
This method or equipment by arranging 2 or multiple measurement rings at certain intervals along the direction that pipeline extends,
For collecting the solid material electrostatic charge signal that phase mutual friction generates during the motion.In pipeline, particulate matter or powder are being transported
Different nowed formings is showed over time during dynamic, and same nowed forming successively flows through this 2 or multiple measurement rings
When, the electrostatic charge signal of generation be it is identical or similar, pass through this phase same sex of comparative analysis or similitude, so that it may point
Be precipitated same nowed forming it is each measurement interannular transition time, and it is each measurement ring spacing be it is certain, with " spacing ÷
Transition time ", so that it may calculate the movement velocity of particulate matter or powder in pipeline；
The disadvantage of this method is that: when in pipeline solid particulate matter or powder during the motion, due to operating condition
The variation of condition, the electrostatic charge signal that phase mutual friction generates weaken to signal processing unit when can not perceive, and measurement result will
Failure.Such case often occurs in industry spot, such as: the moisture content of solid material becomes larger, the movement of solid material
Speed becomes low speed or the partial size of solid material increases (area that contacts with each other becomes smaller) etc., all can lead to electrostatic charge signal sharply
Weaken, this measurement method is caused to fail.
Two, electromagnetism wave dispersion or disturbing signal method
This method along the direction that pipeline extends, is arranging 2 groups or multi-group electrode pair, each electrode pair at certain intervals
Comprising a transmitter and a receiver, the solid material dispersion or disturbance that the electromagnetic wave of transmitting is flowed through, and same solid
Material is flowing through each group of electromagnetic wave transmitting-receiving electrode clock synchronization, and dispersion or disturbance to electromagnetic wave are identical, or with very big
Similarity, according to this same or similar, analysis meter calculates transition time of the same solid material between each group electrode pair, and
Spacing between each group electrode pair be it is certain, solid material can be calculated in pipeline with " spacing ÷ transition time "
Movement velocity.
This method is disadvantageous in that: 1) electromagnetic wave is a kind of space radiated wave, energy sphere of action far beyond
With the range between group electrode pair, it is easy to influence the steady operation of remaining electronic equipment of industry spot.2) equally, receiving electrode had been both
The electromagnetic wave of emission electrode can be so received, the electromagnetic wave that other on-emitting electrodes from space generate can be also received, these
Space spurious electromagnetic waves can impact measurement result, and measuring signal is caused to be distorted, and measurement accuracy reduces even measurement failure.
3) it after the multiple Multipath reflection of electromagnetic wave, reaches receiving electrode again at different times, interferes the letter normally received in the same time
Number, cause measurement result precision to be deteriorated or fail.4) electromagnetism generated between each group electrode pair for the same solid material of guarantee
Wave dispersion or disturbance are identical or with very big similarity, it is desirable to the transmitting unit of each group electrode pair (including transmitting electricity
Pole and will emit electromagnetic wave input emission electrode electronic component etc.) between keep height manufacture consistency, each group electricity
Height is kept between receiving unit (including receiving electrode and by the electronic component etc. of the signal transmission after reception) extremely pair
Manufacture consistency, result in the manufacturing cost of sensor (transmitting unit, receiving unit) to increase in this way, lose its economy
Property.Otherwise, it is difficult to ensure that its measurement accuracy.
In general, density measure has following several implementations:
One, nuclear activity density measuring method
This method by installing radioactive source in tested pipeline radial direction side, install emitting radiation reception device and carry out by the other side
Measurement.The penetron tube road that radioactive source issues, declining through the solid material in piping and gas (carrier gas) that transports material
Reception device is reached after subtracting, in the process, the concentration summation of attenuation and carrier gas and solid material that radioactive ray generate is in one
Fixed proportionate relationship, the density of carrier gas can be calculated according to temperature, the pressure and other parameters of pipeline by equation of gaseous state and be obtained, with total
Density subtract the density of carrier gas after, so that it may obtain the concentration of solid material.
This method is disadvantageous in that: 1) needing radioactive source, there are radioactive source pollutions to environment.2) it is put due to existing
Source is penetrated, the maintenance cost of equipment is high.3) measurement result is obtained by the compensation calculation of " subtracting carrier gas density ", therefore entire
The parameter number (temperature, pressure including carrier gas in pipeline) of process measurement increases, and the reliability and precision of measurement result are opposite
It is poor.
Two, it is measured using the effect of dispersion that solid material generates electromagnetic wave
This method is by installing transmitter and receiver in measurement pipe two sides, and wherein transmitter connects for emitting electromagnetic wave
Device is received for receiving electromagnetic wave, the solid material concentration in measurement pipe is different, different dispersions can be generated to electromagnetic wave, according to electricity
The proportionate relationship of the concentration of the dispersion measure and solid material of magnetic wave calculates the concentration for obtaining solid material in measurement pipe.
This method is disadvantageous in that: 1) electromagnetic wave is a kind of space radiated wave, energy sphere of action far beyond
With the range between group transmitter and receiver, it is easy to influence the steady operation of remaining electronic equipment of industry spot.2) it equally, connects
Since the electromagnetic wave of transmitter can be received by receiving device, the electromagnetic wave that other transmitters from working space generate can be also received,
These space spurious electromagnetic waves can impact measurement result, and measuring signal is caused to be distorted, and measurement accuracy, which reduces, even to be measured
Failure.3) after the multiple Multipath reflection of electromagnetic wave, receiver is reached again at different times, what interference normally received in the same time
Signal causes measurement result precision to be deteriorated or fail.4) for the blending material of many kinds of solids material mixing, when blending ratio is sent out
When changing, the bulk density of solid material changes, at this point, the proportionate relationship of the dispersion measure of electromagnetic wave and concentration will become
Change, can deviate from true value by the calculated concentration of the checked proportionality coefficient of equipment, the solid come out certainly by concentration calculation
The flow of material can also deviate true value, lead to measurement result mistake.
Summary of the invention
Firstly, the present invention provides the measurement method of a kind of graininess of pneumatic conveying or the speed of pulverulent solids material,
Can the speed to the solid material of pneumatic conveying in pipeline carry out accurate, reliable, safety real-time measurement.
A kind of measurement method of the speed of the graininess or pulverulent solids material of pneumatic conveying, is changed by electric field signal
The same fluidised form of the graininess or pulverulent solids material that obtain pneumatic conveying, which flows through, presets getting over for spacing in measurement pipe (chamber)
Time obtains the movement velocity of solid material with " spacing ÷ transition time ".
The present invention also provides the suspension densities (or concentration) of a kind of graininess of pneumatic conveying or pulverulent solids material
Measurement method, can the density (or concentration) to the solid material of pneumatic conveying in pipeline carry out accurate, reliable, safety real-time survey
Amount.
A kind of measurement method of the suspension density (or concentration) of the graininess or pulverulent solids material of pneumatic conveying, passes through
Electric field signal changes the space filling proportion for obtaining measurement pipe (chamber) interior solid material, with " solid material space filling proportion ×
Solid material bulk density " obtains the suspension density of solid material.
The present invention also provides a kind of graininess of pneumatic conveying or the measurement methods of the flow of pulverulent solids material, can be right
The flow of the solid material of pneumatic conveying carries out accurate, reliable, safety real-time measurement in pipeline.
The measurement method of the flow of the graininess or pulverulent solids material of a kind of pneumatic conveying, in above-mentioned pneumatic conveying
The graininess of the measurement method and pneumatic conveying of graininess or the speed of pulverulent solids material or hanging for pulverulent solids material
On the basis of the measurement method of buoyant density, by the way that " movement velocity × solid material space filling proportion × solid material is accumulated close
The cross-sectional area of degree × measurement pipe (chamber) " obtains the flow of measurement pipe (chamber) interior solid material.
The present invention further provides a kind of graininess of pneumatic conveying or the velocity measuring device of pulverulent solids material, energy
Accurate, reliable, safety real-time measurement is carried out to the speed of the solid material of pneumatic conveying in pipeline.
A kind of graininess of pneumatic conveying or the velocity measuring device of pulverulent solids material, including measurement pipe, be mounted on
Tachometric survey electrode in measurement pipe and the speed signal processing unit being connected with the tachometric survey electrode, the tachometric survey
Electrode is one group or more, and every group of tachometric survey electrode includes a public electrode and more than two absolute electrodes, the independence
Electrode is alternatively arranged along pipeline axial direction, and the public electrode is laterally opposed or tiltedly right in measurement pipe with the absolute electrode
And it sets；The public electrode and absolute electrode form more than two tachometric survey electric fields respectively as the positive and negative polarities of electric field.
The present invention further provides a kind of graininess of pneumatic conveying or the flow measurement device of pulverulent solids material, energy
Accurate, reliable, safety real-time measurement is carried out to the flow of the solid material of pneumatic conveying in pipeline.
A kind of graininess of pneumatic conveying or the flow measurement device of pulverulent solids material, in of above-mentioned pneumatic conveying
It further include density measuring equipment and flow integrator, institute on the basis of granular or pulverulent solids material velocity measuring device
It states density measuring equipment and is wholely set or is separately provided with the velocity measuring device, the flow integrator and the speed are surveyed
Amount device and the density measuring equipment are respectively connected with.
Measurement method and device of the invention can be with safety, economy, reliable way to the solid of pneumatic conveying in pipeline
The flowing velocity of particulate matter or powdered substance, suspension density (or concentration) and real-time traffic are accurately measured, even if
Operating condition it is changeful, it is various interfere the severe industry spot that frequently occurs, also still can reliable, high accuracy completion survey
Amount.
Detailed description of the invention
Fig. 1 shows for the partial structurtes of the graininess of pneumatic conveying of the present invention or the flow measurement device of pulverulent solids material
It is intended to；
Fig. 2 is the principle parsing of the graininess of pneumatic conveying of the present invention or the flow measurement device of pulverulent solids material
Figure.
Specific embodiment
Below by way of specific embodiment, the present invention will be described, but the scope of the present invention is not limited thereto.
The measurement method of the speed of the graininess or pulverulent solids material of pneumatic conveying of the present invention, is become by electric field signal
Change show that the graininess of pneumatic conveying or the same fluidised form of pulverulent solids material flow through and presets crossing for spacing in measurement pipe (chamber)
The more time obtains the movement velocity of solid material with " spacing ÷ transition time ".
A kind of specific reality of the speed measurement method of graininess or pulverulent solids material as pneumatic conveying of the present invention
Existing mode can install an electrode in the side of measurement pipe (chamber) wall surface, as the anode of electric field, in its opposite, oblique pair or portion
It is divided to installation on oblique pair of wall surface to be no less than two electrodes, along measurement pipe (chamber) axial direction with certain spaced apart, as electric field
Cathode, issue and terminate at the power lines of multiple cathode so as to form from same anode.Solid material is along measurement pipe (chamber)
Axial direction travels forward, so that these electric field lines sections are passed through from front to back, with solid material in different moments
It flows, is sequentially generated electric field change signal on cathode.The same nowed forming of solid material successively flows through these electric fields, causes this
A little electric fields generate the same or similar variation, these the same or similar variations of comparative analysis can be obtained same nowed forming
Transition time between each electrode can be obtained the movement velocity of solid material with " interval ÷ transition time ".
The advantage of the velocity measuring scheme is:
(1) since the electric field signal for calculating speed is from same anode, this guarantees the electric fields on cathode
Signal difference is entirely that the error introduced is mismatched so as to avoid each electrode accuracy of manufacture as caused by solid material fluidised form,
Measurement accuracy is improved, manufacturing cost is reduced.
(2) using electric field signal work, avoid electrostatic measuring principle at the scene operating condition change when, be unsatisfactory for can detect
Measurement result fails caused by the Production conditions of electrostatic charge signal.
(3) it is worked using electric field signal, when avoiding using transmitting/reception electromagnetic wave signal working method, electromagnetic wave is more
It is superimposed upon after the multiple reflections of path in normal signal or exterior space interference electromagnetic wave enters interference caused by receiver, thus
The risk for causing measurement result precision to reduce or fail.
(4) worked using electric field signal, will not external radiated electromagnetic wave, scene other is set so as to avoid instrument itself
Standby electromagnetic interference.
The measurement method of the suspension density (or concentration) of the graininess or pulverulent solids material of pneumatic conveying of the present invention is led to
The space filling proportion that electric field signal variation obtains measurement pipe (chamber) interior solid material is crossed, with " solid material space filling proportion
× solid material bulk density " obtains the suspension density of solid material.
As the graininess of pneumatic conveying of the present invention or suspension density (or concentration) measurement method of pulverulent solids material
A kind of specific implementation, on the wall surface of measurement pipe (chamber) with respect to, partially with respect to, installation two of oblique pair or oblique pair of part
Electrode, anode of one of electrode as electric field, cathode of another electrode as electric field, power line is from anode, eventually
Terminate in cathode.When there is solid material filling in measurement pipe between positive and negative electrode, electric field signal will change.That is, when surveying
When space is filled up completely full in buret (i.e. the natural packing state of solid material), the variation that electric field signal generates is maximum；Work as survey
When space is not filled completely in buret when blank pipe (i.e.), the change cancellation of electric field signal is minimum.Become according to this electric field signal
Change the variation of electric field signal on detecting electrode, so that it may calculate " solid in measurement pipe with space filling proportion relationship in measurement pipe
The space filling proportion of body material ".Since solid material bulk density is known parameter, pass through " solid material space
Filling proportion × solid material bulk density ", so that it may obtain the graininess of pneumatic conveying or the suspension of pulverulent solids material
Density namely concentration.
The advantage of the Density Detection scheme is:
(1) it is worked using electric field signal, electric field lines terminate at cathode from anode, to ensure that measurement electricity
The sphere of action of field is limited strictly between anode and cathode, will not be generated electromagnetic interferences to the other equipment in scene, be will not influence
To the normal work of other equipment.
(2) using electric field signal work, avoid using electromagnetic wave etc. have spatial characteristic wave worked when,
It is superimposed upon after multipath multiple reflections in normal signal or exterior space interference electromagnetic wave enters interference caused by receiver, from
And the risk for causing measurement result precision to reduce or fail.
(3) it is worked using electric field signal, any radioactive source, the Environmental Safety risk of no radioactive source leakage is not present, nothing is put
Penetrate source follow-up maintenance expense.
The measurement method of the flow of the graininess or pulverulent solids material of pneumatic conveying of the present invention, is in above-mentioned pneumatic transporting
The measurement method of speed and the graininess of pneumatic conveying or pulverulent solids material of the graininess or pulverulent solids material sent
Suspension density measurement method on the basis of, pass through " movement velocity × solid material space filling proportion × solids material heap
The cross-sectional area of product density × measurement pipe (chamber) " obtains the flow of measurement pipe (chamber) interior solid material.
In a kind of specific embodiment, in " movement velocity " and measurement pipe (chamber) " solid material space is filled out
Fill ratio " obtained by installing sensor real-time measurement at the scene, " solid material bulk density " and " measurement pipe (chamber) it is transversal
Area " is then pre-set parameter in signal processing computing unit.
The graininess of pneumatic conveying of the present invention or the velocity measuring device of pulverulent solids material, including measurement pipe, installation
Tachometric survey electrode in measurement pipe and the speed signal processing unit being connected with the tachometric survey electrode, the speed are surveyed
Amount electrode is one group or more, and every group of tachometric survey electrode includes a public electrode and more than two absolute electrodes, described only
Vertical electrode is alternatively arranged along pipeline axial direction, and the public electrode is laterally opposed or oblique in measurement pipe with the absolute electrode
Pair and set；The public electrode and absolute electrode form more than two tachometric survey electric fields respectively as the positive and negative polarities of electric field.
In a specific embodiment, the tachometric survey electrode be mounted on the outer wall of measurement pipe or fully or
It is locally embedded in the tube wall of measurement pipe.
In a specific embodiment, the tachometric survey electrode is the electrode that carbon-point or metal material are constituted.
In a specific embodiment, the material of the measurement pipe is plastics or ceramics.
In a specific embodiment, the measurement pipe is externally provided with protection outer tube, and the protection outer tube is by metal material
It constitutes.
The graininess of pneumatic conveying of the present invention or the flow measurement device of pulverulent solids material, are in above-mentioned pneumatic conveying
Graininess or pulverulent solids material velocity measuring device on the basis of, further include density measuring equipment and flow accumulation
Instrument, the density measuring equipment are wholely set or are separately provided with the velocity measuring device, the flow integrator with it is described
Velocity measuring device and the density measuring equipment are respectively connected with.It is single that flow integrator therein is equivalent to secondary singal processing
Member, is responsible for the speed that will be obtained and density data carries out secondary treatment, and parses and obtain data on flows.
The density measuring equipment can be wholely set or be separately provided with the velocity measuring device.Be wholely set refer to it is close
The measurement structure of degree and speed is integrated within one device, typically, such as is integrated in a measurement pipe.It is separately provided and refers to
The measurement point of density and speed is by different device measurings, and typically, density measuring equipment and velocity measuring device are set to measurement
In the adjacent locations of pipeline.Density and velocity measuring device are by the graininess of the pneumatic conveying of acquisition or pulverulent solids material
Density and speed data pass to integrating instrument respectively, obtain real-time traffic data by integrating instrument analytical calculation.In specific embodiment party
In case, the measurement method of the density measuring equipment includes but is not limited to nuclear activity density measure, the survey of electromagnetic wave effect of dispersion
Amount etc..
In a specific embodiment, the density measuring equipment is wholely set with the velocity measuring device.Institute
It states density measuring equipment to be wholely set with the velocity measuring device, ensure that tachometric survey and space filling proportion measurement are derived from
The same position of process pipe ensure that each parameter time for participating in flow rate calculation takes and a little strictly matches with space samples, from
And avoid previous tachometric survey and measurement of concetration and separate in different location measurement, participate in the parameter space sampling of flow rate calculation
Error caused by position mismatches, to obtain higher instantaneous flow measurement accuracy.
In a more specific embodiment, the density measuring equipment and the velocity measuring device use together a survey
Buret, the density measuring equipment include that density measure electrode and the density signal being connected with density measure electrode processing are single
Member, the density measure electrode are one group or more, and every group of density measure electrode include be mounted on it is laterally opposed in measurement pipe or
Oblique pair of two electrodes, two electrodes form density measure electric field respectively as the positive and negative polarities of electric field.
In a specific embodiment, the density measure electrode be mounted on the outer wall of measurement pipe or fully or
It is locally embedded in the tube wall of measurement pipe.
In a specific embodiment, the density measure electrode is the electrode that carbon-point or metal material are constituted.
The invention will be further described by the following examples.
Fundamental method of measurement of the invention is: the graininess of pneumatic conveying or mass flow=fortune of pulverulent solids material
The cross-sectional area of speed × solid material space filling proportion × solid material bulk density × measurement pipe (chamber) is moved, wherein solid
The cross-sectional area of material accumulation density and measurement pipe (chamber) is by pre-set gain of parameter, movement velocity and measurement pipe
The measuring device real-time measurement of (chamber) interior solid material space filling proportion through the invention obtains.
Embodiment 1
As depicted in figs. 1 and 2, Fig. 1 is the graininess of pneumatic conveying of the present invention or the flow measurement of pulverulent solids material
The partial structural diagram of device, Fig. 2 are the graininess of pneumatic conveying of the present invention or the flow measurement dress of pulverulent solids material
The principle analysis diagram set.Wherein, 1 is measurement pipe；2 be tachometric survey electrode, and wherein 2-1 is public electrode, and 2-2 is independent electrical
Pole；3 be density measure electrode；4 be protection outer tube；A is flow direction of the solid material in measurement pipe；B is multiple along measurement
The tachometric survey electric field of pipe axially spaced-apart arrangement；C is density measure electric field.
Measurement pipe 1 is used to flow through channel to solid material to be measured offer, it is preferable that the internal diameter of the pipeline and process pipe
Internal diameter is equivalent, to avoid the additional pressure loss is introduced；Meanwhile measurement pipe 1 is also used for support installation speed measuring electrode 2 and close
Measuring electrode 3 is spent, to form the applied electric field of flow velocity measurement and filling rate measurement in pipeline radial direction.Protection outer tube 4 is set to
It outside measurement pipe 1, is preferably made of metal material, for protecting the measuring electrode being mounted between measurement pipe 1 and protection outer tube 4.
A represents flow direction of the solid material in measurement pipe 1 in figure.Tachometric survey electrode 2 includes a common electrical
Pole 2-1 and 4 absolute electrode 2-2, absolute electrode 2-2 are alternatively arranged along pipeline axial direction, public electrode 2-1 and absolute electrode
2-2 in measurement pipe 1 laterally opposed or oblique pair and set.Public electrode 2-1 and absolute electrode 2-2 are respectively as positive and negative the two of electric field
Pole forms more than two tachometric survey electric fields.Specifically such as, when public electrode 2-1 is electric field anode, absolute electrode 2-2 is electric field
Cathode；Can also absolute electrode 2-2 be electric field cathode, public electrode 2-1 be electric field anode.B is illustrated between tachometric survey electrode 2
The multiple electric fields along the arrangement of 1 axially spaced-apart of measurement pipe formed.When the same nowed forming of solid material flows successively through these electricity
When field, these electric fields can be caused to generate the same or similar variation, detect the variation of simultaneously these electric fields of comparative analysis, so that it may count
Calculate and obtain same fluidised form in these interelectrode transition time, and the distance of electrode be it is certain, with " spacing ÷ transition time "
The movement velocity for obtaining material in pipeline can be calculated.
C illustrates the measurement electric field formed between 3 two electrodes being oppositely arranged of density measure electrode.When solid in measurement pipe 1
When the filling rate of body material changes, relationship changes applied electric field in certain proportion therewith, typically, when in measurement pipe 1
When no any material is filled (blank pipe), applied electric field becomes cancellation, when being filled up completely full measurement pipe 1, the variable quantity of electric field
It is 100%, to pass through the variation of detection electric field, so that it may calculate the variation of the filling rate of solid material in measurement pipe.
The movement velocity and solid material for the solid material that analysis meter calculates are to the space filling factor of measurement pipe 1, then root
According to the bulk density of pre-set material to be measured and the cross-sectional area of pipeline, so that it may calculate the real-time traffic of solid material.
Embodiment 2
A kind of measurement dress for measuring movement of solid material speed, filling rate and real-time quality flow in Dual-Phrase Distribution of Gas olid
It sets, which contains at least one that nonmetallic measurement pipe, one for the metal jacket pipe of protection element, solid material
Movement velocity measuring unit, solid material space filling factor measuring unit and for by measuring device and material conveying pipe company
Pick up the sealing flange external member come；Wherein, the movement velocity measuring unit of solid material include at least be located at measurement pipe outer wall and
Tachometric survey electric field electrode between protection overcoat inside pipe wall, solid material space filling factor measuring unit include at least solids
Material space filling rate measures electric field electrode.
More specifically, the movement velocity measuring unit of solid material, which contains at least one, is mounted on measurement pipe outer wall radial direction
The metal polar plate of side, the positive or negative pole as applied electric field, and be mounted on the radial other side along pipeline axial direction
With at least two metal polar plates of certain spaced apart, it is used as applied electric field cathode or anode, thus in measurement pipe radial direction
At least two applied electric field is formed with certain axial spacing.The same nowed forming of solid material successively flows through these
Electric field causes these electric fields to generate the same or similar variation, comparative analysis these generate same or similar variation time between
Every, so that it may obtaining same nowed forming can be obtained solid in each interelectrode transition time with " spacing ÷ transition time "
The movement velocity of body material.
More specifically, solid material space filling factor measuring unit, which contains at least one, is mounted on measurement pipe outer wall radial direction
The metal polar plate of side, the positive or negative pole as applied electric field, and it is installed at least one metal pole of the radial other side
Plate, cathode or anode as applied electric field.When space filling proportion of the solid material in measurement pipe changes, positive and negative anodes
Applied electric field between plate changes correspondingly, according to the variation of applied electric field and the proportionate relationship of space filling proportion, by detecting work
Make the variation of electric field, space filling factor of the solid material in measurement pipe can be calculated.
By the bulk density of solid material pre-set in measuring device and the cross-sectional area of measurement pipe, pass through survey
Buret measurement obtains solid material and flows through the space packing ratio of the movement velocity and solid material of measurement pipe in measurement pipe
Example, with " solid material space filling proportion × solid material bulk density × measurement pipe in flow=movement velocity × measurement pipe
Cross-sectional area " calculates the real-time traffic of solid material in pipeline.
Embodiments above is only used to illustrate the technical scheme of the present invention and not to limit it.Those skilled in the art are not departing from
In the case where the objective and range of technical solution of the present invention, to modification or equivalent replacement that the technical solution of invention carries out,
It should cover in the range of the claims in the present invention.
Claims (10)
1. a kind of measurement method of the speed of the graininess or pulverulent solids material of pneumatic conveying, it is characterised in that: pass through electricity
Field signal variation show that the graininess of pneumatic conveying or the same fluidised form of pulverulent solids material flow through in measurement pipe (chamber) and presets
The transition time of spacing obtains the movement velocity of solid material with " spacing ÷ transition time ".
2. a kind of measurement method of the suspension density of the graininess or pulverulent solids material of pneumatic conveying, it is characterised in that: logical
The space filling proportion that electric field signal variation obtains measurement pipe (chamber) interior solid material is crossed, with " solid material space filling proportion
× solid material bulk density " obtains the suspension density of solid material.
3. a kind of measurement method of the flow of the graininess or pulverulent solids material of pneumatic conveying, it is characterised in that: in right
It is required that passing through " movement velocity × solid material space filling proportion × solid material bulk density × measurement on the basis of 1 and 2
The cross-sectional area of pipe (chamber) " obtains the flow of measurement pipe (chamber) interior solid material.
4. a kind of graininess of pneumatic conveying or the velocity measuring device of pulverulent solids material, it is characterised in that: including measurement
The tachometric survey electrode manage, being mounted in measurement pipe and the speed signal processing unit being connected with the tachometric survey electrode, institute
Stating tachometric survey electrode is one group or more, and every group of tachometric survey electrode includes a public electrode and more than two independent electricals
Pole, the absolute electrode are alternatively arranged along pipeline axial direction, and the public electrode and the absolute electrode are horizontal in measurement pipe
To it is opposite or oblique pair and set；The public electrode and absolute electrode form more than two speed respectively as the positive and negative polarities of electric field
Degree measurement electric field.
5. the graininess of pneumatic conveying according to claim 4 or the velocity measuring device of pulverulent solids material, special
Sign is: the tachometric survey electrode is mounted on the outer wall of measurement pipe or fully or is locally embedded in the tube wall of measurement pipe
In；Preferably, the tachometric survey electrode is the electrode that carbon-point or metal material are constituted；It is highly preferred that the material of the measurement pipe
Matter is plastics or ceramics.
6. the graininess of pneumatic conveying according to claim 4 or the velocity measuring device of pulverulent solids material, special
Sign is: the measurement pipe is externally provided with protection outer tube, which is made of metal material.
7. a kind of graininess of pneumatic conveying or the flow measurement device of pulverulent solids material, it is characterised in that: wanted in right
On the basis of asking the graininess of the described in any item pneumatic conveyings of 4-6 or the velocity measuring device of pulverulent solids material, also wrap
Density measuring equipment and flow integrator are included, the density measuring equipment is wholely set with the velocity measuring device or individually sets
It sets, the flow integrator is respectively connected with the velocity measuring device and the density measuring equipment.
8. the graininess of pneumatic conveying according to claim 7 or the flow measurement device of pulverulent solids material, special
Sign is: the density measuring equipment is wholely set with the velocity measuring device.
9. the graininess of pneumatic conveying according to claim 8 or the flow measurement device of pulverulent solids material, special
Sign is: with a measurement pipe is used, the density measuring equipment includes for the density measuring equipment and the velocity measuring device
Density measure electrode and the density signal processing unit being connected with the density measure electrode, the density measure electrode are one group
More than, and every group of density measure electrode includes two electrodes for being mounted on laterally opposed or oblique pair in measurement pipe, two electrodes point
Not as the positive and negative polarities of electric field, density measure electric field is formed.
10. the graininess of pneumatic conveying according to claim 9 or the flow measurement device of pulverulent solids material, special
Sign is: the density measure electrode is mounted on the outer wall of measurement pipe or fully or is locally embedded in the tube wall of measurement pipe
In；Preferably, the density measure electrode is the electrode that carbon-point or metal material are constituted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811576983.8A CN109540233A (en) | 2018-12-23 | 2018-12-23 | Speed, the measurement method and device of density and flow of pneumatic conveying solid material |
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| CN201811576983.8A CN109540233A (en) | 2018-12-23 | 2018-12-23 | Speed, the measurement method and device of density and flow of pneumatic conveying solid material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323091A (en) * | 2020-04-08 | 2020-06-23 | 山东齐芯智控科技有限公司 | Pyroelectric current amount sensor and working method thereof |
| CN111811573A (en) * | 2020-06-30 | 2020-10-23 | 江苏大学 | Method for monitoring motion state of screen surface material |
-
2018
- 2018-12-23 CN CN201811576983.8A patent/CN109540233A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323091A (en) * | 2020-04-08 | 2020-06-23 | 山东齐芯智控科技有限公司 | Pyroelectric current amount sensor and working method thereof |
| CN111811573A (en) * | 2020-06-30 | 2020-10-23 | 江苏大学 | Method for monitoring motion state of screen surface material |
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