CN204594496U - Based on the fluid bed solids grain testing apparatus of netted electrostatic sensor - Google Patents
Based on the fluid bed solids grain testing apparatus of netted electrostatic sensor Download PDFInfo
- Publication number
- CN204594496U CN204594496U CN201520235892.3U CN201520235892U CN204594496U CN 204594496 U CN204594496 U CN 204594496U CN 201520235892 U CN201520235892 U CN 201520235892U CN 204594496 U CN204594496 U CN 204594496U
- Authority
- CN
- China
- Prior art keywords
- electrostatic sensor
- signal
- netted electrostatic
- netted
- regulated kinase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a kind of fluid bed solids grain testing apparatus based on netted electrostatic sensor belonged in gas-solid diphasic stream parameter detection field.This device is made up of netted electrostatic sensor, Signal-regulated kinase, signal characteristic abstraction module and cross-correlation calculation module.The metal wire that netted electrostatic sensor is coated with insulation high-abrasive material by many surfaces is formed, and is placed in fluidized bed.Particle produces electrostatic in flow process, the induced charge relevant to particle flow state is induced based on electrostatic induction principle when flowing through netted electrostatic sensor, carry out amplifying and filtering through Signal-regulated kinase, then by cross-correlation calculation module and signal characteristic abstraction module, solid particle in fluidized bed radial flow velocity, axial flow velocity and CONCENTRATION DISTRIBUTION can be obtained.This structure of the detecting device is simple, and cost is low, highly sensitive, and resolution is high, and the total cross-section that can realize solid particle flow parameter in fluidized bed detects in real time.
Description
Technical field
The utility model belongs to gas-solid diphasic stream parameter detection technique field, particularly relates to a kind of fluid bed solids grain testing apparatus based on netted electrostatic sensor.
Background technology
Gas-solid fluidized bedly to be widely used in industrial process due to the mixing between its good two-phase and mass-and heat-transfer ability.In gas-solid fluidized bed, the flow velocity of solid particle and CONCENTRATION DISTRIBUTION along with the change difference of time and position very large.Because the flow velocity of solid particle and CONCENTRATION DISTRIBUTION have a significant impact the performance of fluidized bed in particular procedure, therefore need to measure the flow velocity of solid particle in fluidized bed and CONCENTRATION DISTRIBUTION.Existing measuring method comprises image method, imaging method, optic probe, capacitance probe, pressure survey and acoustic method, but these methods all also exist defect above.Such as, due to blocking of solid particle, image method is difficult to the measurement of concentrated phase area.Optic probe and capacitance probe are measuring methods, are difficult to obtain global measuring result.Acoustic measurements is impact being subject to neighbourhood noise etc. easily.Therefore, new measuring method is needed to solve the measurement problem of gas-solid fluidized bed middle solid particle flow parameter.
Because the friction between solid particle and between solid particle and tube wall and collision can cause solid particle charged in fluidized bed.This particle charge phenomenon can cause particle agglomeration, is pasted onto the phenomenons such as tube wall, affects the heat and mass transport between two-phase, even can cause the dangerous situations such as electric discharge and blast.Although the electrostatic phenomenon in fluidized bed can impact industrial process, may be used for the measurement of solid particle flow parameter in fluidized bed.
Summary of the invention
In order to solve the measurement problem of gas-solid fluidized bed middle solid particle flow parameter, this patent proposes a kind of fluid bed solids grain testing apparatus based on netted electrostatic sensor, comprising: netted electrostatic sensor, Signal-regulated kinase, signal characteristic abstraction module and cross-correlation calculation module; Wherein, netted electrostatic sensor is connected with Signal-regulated kinase, and Signal-regulated kinase is connected with cross-correlation calculation module with signal characteristic abstraction module respectively.
The net that the metal wire that described netted electrostatic sensor is coated with insulation high-abrasive material by many surfaces forms, each wires is all connected with Signal-regulated kinase.
In described netted electrostatic sensor, the number of metal wire can adjust accordingly according to the physical size of the requirement of accuracy of detection and pipeline with arranging, wherein at least arrange two groups of orthogonal metal wires in same netted electrostatic sensor, and often group metal wire has two metal wires be parallel to each other at least, the metal wire that every root is parallel to each other is to each other apart from controlling between 10mm to 30mm.
Metal wire in described netted electrostatic sensor is fixed by insulating sealing plug and fluidized bed pipeline.
Described netted electrostatic sensor is arranged on fluidized bed pipe interior, and the direction of conduit axis is placed the netted electrostatic sensor of identical set more than two, and wherein the spacing of any two networking shape electrostatic transducers is less than 20mm.
Described Signal-regulated kinase comprises the charge amplifying circuit, low-pass filter circuit and the adjustable gain amplifying circuit that are connected successively, and this Signal-regulated kinase is close to fluidized bed outer tube wall and is arranged, and is connected with metal wire one end of netted electrostatic sensor.
The outside of described netted electrostatic sensor and Signal-regulated kinase is provided with metallic shield and carries out electromagnetic screen.
Beneficial effect of the present invention: 1) adopt surface to be coated with the metal wire composition netted electrostatic sensor of insulation high-abrasive material, provides and is a kind ofly applicable to based on electrostatic induction the apparatus and method that fluid bed solids particle flow parameter detects in real time; 2) adopt surface to be coated with the metal wire composition netted electrostatic sensor of insulation high-abrasive material, highly sensitive, resolution is high, and detected parameters is many, can realize concentration of solid particles, radial flow velocity and the isoparametric total cross-section of axial flow velocity simultaneously and measure in real time; 3) metal line surface is coated with high-abrasive material, sensor long service life; 4) diameter of metal wire is very little, and mesh sensor hinders degree little to powder flowing in fluidized bed; 5) each metal wire is independent of one another, and structure is simple, and cheap, can change separately, product repairing cost is low.
Accompanying drawing explanation
Fig. 1 is the fluid bed solids grain testing apparatus structural representation based on netted electrostatic sensor;
Fig. 2 is netted electrostatic transducer transversely diagrammatic cross-section;
In figure: 1-fluidized bed pipeline, 2-netted electrostatic sensor, 3-Signal-regulated kinase, 4-cross-correlation calculation module, 5-signal characteristic abstraction module, 6-surface is coated with metal wire, the 7-insulating sealing plug of insulation high-abrasive material.
Embodiment
The invention provides a kind of novel fluid bed solids grain testing apparatus based on netted electrostatic sensor, realize the CONCENTRATION DISTRIBUTION of solid particle in fluidized bed, the real-time detection of the multiparameter such as axial flow velocity and radial flow velocity, below in conjunction with accompanying drawing and case study on implementation, the invention will be further described:
Based on netted electrostatic sensor fluid bed solids grain testing apparatus structural representation as shown in Figure 1, described netted electrostatic sensor 2 is arranged on fluidized bed pipeline 1, netted electrostatic sensor gained signal is changed by Signal-regulated kinase 3, filtering and amplification, and the total cross-section utilizing signal characteristic abstraction module 4 and cross-correlation calculation module 5 to realize solid particle flow parameter in fluidized bed detects in real time.
The metal wire 6 that the implementation case selects 12 surfaces to be coated with insulation high-abrasive material forms a netted electrostatic sensor 2, and insulation high-abrasive material Ceramics, copper cash selected by metal wire.Netted electrostatic transducer transversely diagrammatic cross-section as shown in Figure 2, copper cash extend into pipe interior, wherein 6 copper cash and other 6 copper cash intersecting vertical are arranged, distance between 6 copper cash be parallel to each other is equal, every bar copper cash 6 is fixed with fluidized bed pipeline by the insulating sealing plug 7 at two ends, wherein the diameter of every bar copper cash is 1.5mm, and the distance between two adjacent copper is 10mm.
The implementation case selects the spacing of netted electrostatic sensor 2, the two networking shape electrostatic transducer of two groups of identical set to be 20mm on fluidized bed axial direction.
Every 6 copper cash and a Signal-regulated kinase close installation, the induced charge signal of Signal-regulated kinase to copper cash gained is changed, filtering and amplification, the voltage signal after being amplified.At netted electrostatic sensor and Signal-regulated kinase outside, metallic shield is installed to shield.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (7)
1. based on a fluid bed solids grain testing apparatus for netted electrostatic sensor, it is characterized in that, comprising: netted electrostatic sensor, Signal-regulated kinase, signal characteristic abstraction module and cross-correlation calculation module; Wherein, netted electrostatic sensor is connected with Signal-regulated kinase, and Signal-regulated kinase is connected with cross-correlation calculation module with signal characteristic abstraction module respectively.
2. device according to claim 1, is characterized in that, the net that the metal wire that described netted electrostatic sensor is coated with insulation high-abrasive material by many surfaces forms, and each wires is all connected with Signal-regulated kinase.
3. device according to claim 2, it is characterized in that, number and the layout of the metal wire in described netted electrostatic sensor can adjust accordingly according to the physical size of the requirement of accuracy of detection and pipeline, wherein at least arrange two groups of orthogonal metal wires in same netted electrostatic sensor, and often group metal wire has two metal wires be parallel to each other at least, the metal wire that every root is parallel to each other is to each other apart from controlling between 10mm to 30mm.
4. device according to claim 3, it is characterized in that, the metal wire in described netted electrostatic sensor is fixed by insulating sealing plug and fluidized bed pipeline.
5. device according to claim 1 or 2 or 3 or 4, it is characterized in that, described netted electrostatic sensor is arranged on fluidized bed pipe interior, the direction of conduit axis is placed the netted electrostatic sensor of identical set more than two, and wherein the spacing of any two networking shape electrostatic transducers is less than 20mm.
6. device according to claim 1 or 2 or 3 or 4, it is characterized in that, described Signal-regulated kinase comprises the charge amplifying circuit, low-pass filter circuit and the adjustable gain amplifying circuit that are connected successively, this Signal-regulated kinase is close to fluidized bed outer tube wall and is arranged, and is connected with metal wire one end of netted electrostatic sensor.
7. device according to claim 1 or 2 or 3 or 4, it is characterized in that, the outside of described netted electrostatic sensor and Signal-regulated kinase is provided with metallic shield and carries out electromagnetic screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235892.3U CN204594496U (en) | 2015-04-20 | 2015-04-20 | Based on the fluid bed solids grain testing apparatus of netted electrostatic sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235892.3U CN204594496U (en) | 2015-04-20 | 2015-04-20 | Based on the fluid bed solids grain testing apparatus of netted electrostatic sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204594496U true CN204594496U (en) | 2015-08-26 |
Family
ID=53930641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520235892.3U Active CN204594496U (en) | 2015-04-20 | 2015-04-20 | Based on the fluid bed solids grain testing apparatus of netted electrostatic sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204594496U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764493A (en) * | 2015-04-20 | 2015-07-08 | 华北电力大学 | Fluidized bed solid particle detection device and method based on mesh electrostatic sensor |
| CN108534835A (en) * | 2018-05-07 | 2018-09-14 | 中国核动力研究设计院 | Two phase flow interface parameter measurement method |
-
2015
- 2015-04-20 CN CN201520235892.3U patent/CN204594496U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764493A (en) * | 2015-04-20 | 2015-07-08 | 华北电力大学 | Fluidized bed solid particle detection device and method based on mesh electrostatic sensor |
| CN104764493B (en) * | 2015-04-20 | 2017-08-04 | 华北电力大学 | Fluid bed solids grain testing apparatus and method based on netted electrostatic sensor |
| CN108534835A (en) * | 2018-05-07 | 2018-09-14 | 中国核动力研究设计院 | Two phase flow interface parameter measurement method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104764493B (en) | Fluid bed solids grain testing apparatus and method based on netted electrostatic sensor | |
| CN109374071B (en) | Capacitance gas-solid two-phase flow measuring device and method | |
| CN102608350B (en) | Method and device for detecting gas-solid two-phase flow velocity distribution by multielectrode electrostatic method | |
| KR101224362B1 (en) | Device for Measuring Two-phase Flow Phase Concentration, System and Method for Measuring Flow Parameters of Two-phase Flow | |
| Ostrowski et al. | Real time visualisation and analysis of dense phase powder conveying | |
| CN101839889B (en) | Particle velocity distribution arc static sensor array measuring method and device thereof | |
| CN102435237B (en) | Gas-solid two-phase flow parameter detector | |
| Zhang et al. | Theoretical and experimental studies of the spatial sensitivity of an electrostatic pulverised fuel meter | |
| CN105628571A (en) | Fluidized bed mixed particle detection device and method based on electrostatic and photoelectric sensor | |
| CN107218975A (en) | Gas-solid two-phase flow detection device and method based on spiral capacitor-annular electrostatic sensor | |
| CN204594496U (en) | Based on the fluid bed solids grain testing apparatus of netted electrostatic sensor | |
| Li et al. | Local particle mean velocity measurement using electrostatic sensor matrix in gas–solid two-phase pipe flow | |
| Hu et al. | A comparative study of induced and transferred charges for mass flow rate measurement of pneumatically conveyed particles | |
| CN104655395A (en) | Device and method for detecting flow parameters of powder fluid in rectangular tube based on electrostatic induction | |
| Coombes et al. | Measurement of velocity and concentration profiles of pneumatically conveyed particles using an electrostatic sensor array | |
| Wang et al. | Vibration sensor approaches for the sand detection in gas–sand two phases flow | |
| Zhe et al. | Study on the spatial filtering and sensitivity characteristic of inserted electrostatic sensors for the measurement of gas–solid two-phase flow parameters | |
| Xu et al. | The spatial filtering method for solid particle velocity measurement based on an electrostatic sensor | |
| CN109945933A (en) | A kind of dust flow rate testing methods and the dust flow detector based on electrostatic induction | |
| CN201796091U (en) | Electrostatic induction device for collecting and measuring electrostatic signals of gas-phase and solid-phase flow | |
| CN204346671U (en) | Based on powder flow flow parameter pick-up unit in the rectangular tube of electrostatic induction | |
| CN209214689U (en) | A kind of capacitor Measurement device | |
| Rahmat et al. | Sensing and filtering characteristics of electrostatic sensors for pneumatically conveyed particles | |
| CN106771047B (en) | Multi-sensor-based pulverized coal water content and coal type monitoring device and method | |
| Gajewski | Electrostatic flow probe and measuring system calibration for solids mass flow rate measurement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |