CN205506631U - Fluidized bed composite grain detection device based on static and photoelectric sensor - Google Patents
Fluidized bed composite grain detection device based on static and photoelectric sensor Download PDFInfo
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- CN205506631U CN205506631U CN201620247055.7U CN201620247055U CN205506631U CN 205506631 U CN205506631 U CN 205506631U CN 201620247055 U CN201620247055 U CN 201620247055U CN 205506631 U CN205506631 U CN 205506631U
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Abstract
The utility model discloses a belong to the fluidized bed composite grain detection device based on static and photoelectric sensor among heterogeneous class of parameter detection area of gas -solid. The device is by arc electrostatic transducer, photoelectricity excitation and detection array, photosignal stimulating module, photoelectricity and static signal conditioning module, signal characteristics draw the module and cross -correlation calculation module constitutes. Arc electrostatic transducer comprises multiunit metal electrode. Diode cluster one -tenth is surveyed by a set of range at fluidized bed nearly infrared light emitting diode and near -infrared all around with the detection array to the photoelectricity excitation. Photoelectricity and static signal conditioning module with weak photoelectricity and static signal change, filtering and enlarge. Signal characteristics draw the module utilize photoelectricity deamplification draw with the fluidized bed in the composite grain concentration distribution phase parameter of closing. This detection device is that non -invasive measures, and simple structure is with low costs, and sensitivity is high, can realize the real -time detection of composite grain's in the fluidized bed multi -parameters such as the velocity of flow and concentration profile.
Description
Technical field
This utility model belongs to gas-solid multiphase flow parameter detecting field, detects device particularly to a kind of fluid bed hybrid particles based on electrostatic and photoelectric sensor.
Background technology
Gas-solid fluidized bed due to its good biphase between mixing and mass-and heat-transfer ability be widely used in industrial process.In gas-solid fluidized bed, the flow velocity of solid particle and concentration distribution are the biggest with the change difference of position over time.Owing in the flow velocity of solid particle and dense Degree distributions particular procedure, the performance of fluid bed has a significant impact, it is therefore desirable to flow velocity and the concentration distribution of solid particle in fluid bed are measured.Existing measuring method includes image method, imaging method, capacitance probe, pressure measxurement and acoustic method, but the above method all also exists defect.Such as, due to blocking of solid particle, image method is difficult to the measurement of concentrated phase area.Capacitance probe is a measuring method, hardly results in global measuring result.Acoustic measurements is easily subject to the impact etc. of environment noise.Accordingly, it would be desirable to new measuring method solves the measurement problem of gas-solid fluidized bed middle solid particle flow parameter.
In gas-solid fluidized bed, solid particle is frequently not and is made up of single a kind of granule, such as in biomass gasification process, owing to biomass itself are difficult to fluidisation, typically require addition inert particle, therefore to fluid mapper process is monitored, need flow velocity and the concentration distribution of hybrid particles in fluid bed are measured；Solve the measurement problem of gas-solid fluidized bed middle hybrid particles flowing parameter.
Utility model content
The purpose of this utility model is to include image method for existing measuring method, imaging method, capacitance probe, pressure measxurement and acoustic method, but the above method all also exists defect and provides a kind of fluid bed hybrid particles based on electrostatic and photoelectric sensor to detect device, it is characterized in that, described fluid bed hybrid particles based on electrostatic and photoelectric sensor detection device is by arc electrostatic transducer, photon-electron excitation and detection array, photosignal stimulating module, photosignal conditioning module, electrostatic signal conditioning module, signal characteristic abstraction module and cross-correlation calculation module composition；Wherein arc electrostatic transducer, photon-electron excitation and detection array are separately mounted on fluid bed pipeline outer wall, and arc electrostatic transducer is connected with cross-correlation calculation module by electrostatic signal conditioning module
,
To realize VELOCITY DISTRIBUTION detection；Photon-electron excitation and detection array are connected with photosignal stimulating module and photosignal conditioning module, and photosignal conditioning module and signal characteristic abstraction module connect, to realize concentration distribution detection；And installation metallic shield carries out electromagnetic shielding outside arc electrostatic transducer and electrostatic signal conditioning module.
Described arc electrostatic transducer is constituted by organizing metal electrode more, and often group comprises multiple electrode, and multiple electrodes array in parallel to each other the most separated by a distance is distributed in fluid bed outer surface；Wherein, the axial width of electrode should control
2mm
Arrive
10mm
Between, the electrode being parallel to each other is to each other away from controlling
10mm
Arrive
30mm
Between.
In described arc electrostatic transducer, the number of electrode and layout require according to accuracy of detection and line size adjusts accordingly.
Described photon-electron excitation and detection array are made up of one group of near-infrared luminous diode being arranged in fluid bed surrounding and near infrared from detecting diode；Near-infrared luminous diode and photosignal stimulating module connect, and near infrared from detecting diode is connected with photosignal conditioning module and signal characteristic abstraction module.
Photon-electron excitation and detection array are according to parallel light path distribution and or fan-shaped light path distribution；And the number of light emitting diode and detection diode requires according to accuracy of detection and line size adjusts accordingly.
Photosignal stimulating module generates the pumping signal of light emitting diode, and is controlled the excitation order of different light emitting diodes.
Faint photoelectricity and electrostatic signal are carried out changing, filter and amplifying by photoelectricity and electrostatic signal conditioning module, in order to be acquired signal and process.
The beneficial effects of the utility model:
1
) this structure of the detecting device is simple, low cost, highly sensitive, can realize the real-time detection of hybrid particles flowing parameter in fluid bed；
2
) detection device be non-intrusion measurement, in fluid bed powder flowing hinder degree little；The real-time detection of the multiparameter such as flow velocity and concentration distribution of hybrid particles in fluid bed can be realized.
Accompanying drawing explanation
Figure
1
For fluid bed hybrid particles structure of the detecting device schematic diagram based on electrostatic and photoelectric sensor.
Figure
2
For arc electrostatic transducer schematic cross-section.
Figure
3
For photon-electron excitation and detection array schematic cross-section.
Figure
In:
1.
Fluid bed；
2.
Arc electrostatic transducer；
3.
Near-infrared luminous diode；
4.
Near infrared from detecting diode；
5.
Photosignal conditioning module；
6.
Electrostatic signal conditioning module；
7.
Photosignal stimulating module；
8.
Signal characteristic abstraction module；
9.
Cross-correlation calculation module.
Detailed description of the invention
This utility model provides a kind of fluid bed hybrid particles based on electrostatic and photoelectric sensor detection device, described fluid bed hybrid particles based on electrostatic and photoelectric sensor detection device to be made up of arc electrostatic transducer, photon-electron excitation and detection array, photosignal stimulating module, photosignal conditioning module, electrostatic signal conditioning module, signal characteristic abstraction module and cross-correlation calculation module；In can realizing fluid bed, the real-time of multiparameter such as the distribution of hybrid particles concentration and VELOCITY DISTRIBUTION detects；Below in conjunction with the accompanying drawings and case study on implementation the utility model is described in further detail
.
Figure
1
It show fluid bed hybrid particles structure of the detecting device schematic diagram based on electrostatic and photoelectric sensor.Arc electrostatic transducer shown in figure
2
It is arranged on fluid bed pipeline
1
On outer wall, arc electrostatic transducer
2
By electrostatic signal conditioning module
6
With cross-correlation calculation module
9
Connect
,
And at arc electrostatic transducer
2
With electrostatic signal conditioning module
6
Outside metallic shield of installing carries out electromagnetic shielding.Arc electrostatic transducer gained electrostatic induction signal passes through electrostatic signal conditioning module
6
Change, filter and amplify, and utilize cross-correlation calculation module
9
In realizing fluid bed, the real-time of hybrid particles flow velocity distribution detects.Wherein arc electrostatic transducer is constituted by organizing metal electrode more, and often group comprises multiple electrode, and multiple electrodes array in parallel to each other the most separated by a distance is distributed in fluid bed outer surface (such as figure
2
Shown in)；Wherein, the axial width of electrode should control
2mm
Arrive
10mm
Between, the electrode being parallel to each other is to each other away from controlling
10mm
Arrive
30mm
Between；In arc electrostatic transducer, the number of electrode and layout require according to accuracy of detection and line size adjusts accordingly.
Figure
1
In, photon-electron excitation and detection array are by one group of near-infrared luminous diode being arranged in fluid bed surrounding
3
With near infrared from detecting diode
4
Composition.Near-infrared luminous diode
3
With photosignal stimulating module
7
Connect；Near infrared from detecting diode
4
With photosignal conditioning module
5
With signal characteristic abstraction module
8
Connect；Photosignal stimulating module
7
Generate the pumping signal of near-infrared luminous diode, and the excitation order of different light emitting diodes is controlled；Photosignal conditioning module
5
Carry out changing, filter and amplifying by faint photosignal, in order to signal is acquired and processes.
(such as figure
3
Shown in) photon-electron excitation and detection array be according to parallel light path distribution and or fan-shaped light path distribution；And the number of light emitting diode and detection diode requires according to accuracy of detection and line size adjusts accordingly.
Embodiment
In the implementation case, arc electrostatic transducer
2
By four groups of electrodes, often three arc copper electrode compositions of group, figure
2
It show arc electrostatic transducer schematic cross-section；Arc copper electrode array is distributed in fluid bed pipeline
1
Outer wall, the most each copper electrode width is
6mm
, central angle is
60
Degree, the distance between two adjacent copper electrodes is
20mm
.Often group arc copper electrode and an electrostatic signal conditioning module close installation, electrode gained electrostatic induction signal is changed, filters and is amplified by electrostatic signal conditioning module；In order to improve signal to noise ratio, metallic shield is installed outside arc electrostatic transducer and electrostatic signal conditioning module and shields.Electrostatic signal after being amplified.According to the difference of electrostatic signal frequency characteristic when fluidized bed flow of the variable grain in hybrid particles, by signal decomposition, the electrostatic signal of upstream and downstream heterogeneity is carried out cross-correlation calculation, draw the velocity flow profile of hybrid particles in fluid bed；
Photon-electron excitation and detection array are by eight groups of near-infrared luminous diodes
3
With near infrared from detecting diode
4
Composition.Photosignal stimulating module
7
It is connected with light emitting diode, generates the pumping signal of light emitting diode, and the excitation order of different light emitting diodes is controlled.Photosignal conditioning module
5
Detection diode gained signal is changed, filters and amplify.According to
Bear-Lambert
Law, light is relevant to the physical property of granule density and granule by attenuation characteristic during measured zone；During detection, the attenuation after being emitted beam different light emitting diodes by measured zone by signal characteristic abstraction module is analyzed, and draws the concentration distribution situation of hybrid particles in fluid bed.
Claims (7)
1. fluid bed hybrid particles based on an electrostatic and photoelectric sensor detection device, it is characterized in that, described fluid bed hybrid particles based on electrostatic and photoelectric sensor detection device is made up of arc electrostatic transducer, photon-electron excitation and detection array, photosignal stimulating module, photosignal conditioning module, electrostatic signal conditioning module, signal characteristic abstraction module and cross-correlation calculation module；Wherein arc electrostatic transducer, photon-electron excitation and detection array are separately mounted on fluid bed pipeline outer wall, and arc electrostatic transducer is connected with cross-correlation calculation module by electrostatic signal conditioning module, to realize VELOCITY DISTRIBUTION detection；Photon-electron excitation and detection array are connected with photosignal stimulating module and photosignal conditioning module, and photosignal conditioning module and signal characteristic abstraction module connect, to realize concentration distribution detection；And installation metallic shield carries out electromagnetic shielding outside arc electrostatic transducer and electrostatic signal conditioning module.
Fluid bed hybrid particles based on electrostatic and photoelectric sensor the most according to claim 1 detection device, it is characterized in that, described arc electrostatic transducer is constituted by organizing metal electrode more, often group comprises multiple electrode, and multiple electrodes array in parallel to each other the most separated by a distance is distributed in fluid bed outer surface；Wherein, the axial width of electrode should control between 2mm to 10mm, and the electrode being parallel to each other is to each other away from controlling between 10mm to 30mm.
Fluid bed hybrid particles based on electrostatic and photoelectric sensor the most according to claim 2 detection device, it is characterised in that in described arc electrostatic transducer, the number of electrode and layout require according to accuracy of detection and line size adjusts accordingly.
Fluid bed hybrid particles based on electrostatic and photoelectric sensor the most according to claim 1 detection device, it is characterized in that, described photon-electron excitation and detection array are made up of one group of near-infrared luminous diode being arranged in fluid bed surrounding and near infrared from detecting diode；Near-infrared luminous diode and photosignal stimulating module connect, and near infrared from detecting diode is connected with photosignal conditioning module and signal characteristic abstraction module.
Fluid bed hybrid particles based on electrostatic and photoelectric sensor the most according to claim 4 detection device, it is characterised in that photon-electron excitation and detection array are according to parallel light path distribution and or fan-shaped light path distribution；And the number of light emitting diode and detection diode requires according to accuracy of detection and line size adjusts accordingly.
Fluid bed hybrid particles based on electrostatic and photoelectric sensor the most according to claim 4 detection device, it is characterised in that photosignal stimulating module generates the pumping signal of light emitting diode, and is controlled the excitation order of different light emitting diodes.
Fluid bed hybrid particles based on electrostatic and photoelectric sensor the most according to claim 4 detection device, it is characterized in that, faint photoelectricity and electrostatic signal are carried out changing, filter and amplifying by photoelectricity and electrostatic signal conditioning module, in order to be acquired signal and process.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108332809A (en) * | 2018-02-09 | 2018-07-27 | 深圳华清精密科技有限公司 | A kind of mass flow meter of Dual-Phrase Distribution of Gas olid |
| CN108982602A (en) * | 2018-06-21 | 2018-12-11 | 中国民航大学 | Aero-engine air intake duct condenser type electrostatic induction monitors system |
-
2016
- 2016-03-29 CN CN201620247055.7U patent/CN205506631U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108332809A (en) * | 2018-02-09 | 2018-07-27 | 深圳华清精密科技有限公司 | A kind of mass flow meter of Dual-Phrase Distribution of Gas olid |
| CN108982602A (en) * | 2018-06-21 | 2018-12-11 | 中国民航大学 | Aero-engine air intake duct condenser type electrostatic induction monitors system |
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