CN108444391A - The measuring device and measuring method of solid suspension height in the transparent stirred tank of multiphase - Google Patents
The measuring device and measuring method of solid suspension height in the transparent stirred tank of multiphase Download PDFInfo
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- CN108444391A CN108444391A CN201810216477.1A CN201810216477A CN108444391A CN 108444391 A CN108444391 A CN 108444391A CN 201810216477 A CN201810216477 A CN 201810216477A CN 108444391 A CN108444391 A CN 108444391A
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- stirred tank
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- height
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- 239000007787 solid Substances 0.000 title claims abstract description 49
- 239000000725 suspension Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007791 liquid phase Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000000691 measurement method Methods 0.000 claims abstract description 4
- 239000007790 solid phase Substances 0.000 claims description 16
- 239000006228 supernatant Substances 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000011160 research Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000035772 mutation Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 241000238097 Callinectes sapidus Species 0.000 claims description 2
- 235000013399 edible fruits Nutrition 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 8
- 230000006399 behavior Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
Abstract
The invention discloses the measuring device and measuring method of solid suspension height in the transparent stirred tank of multiphase.The device includes tachometer of measuring, motor, transparent stirred tank, apart from object of reference, computer and digital camera.Measurement method is：Solid-liquid phase materials are added into stirred tank, digital camera is placed in front of stirred tank and is shot, motor is connected through tachometer of measuring with computer；It is pasted at solid liquid phase material liquid surface apart from object of reference, adjusts speed of agitator to rotating speed is measured, shot after paddle the operation is stable to be mixed, obtain the image of stirred tank；Image is cut and obtains RGB component；Binary conversion treatment is carried out to RGB component value, solid suspension height is calculated according to binary conversion treatment result with the data of height change.The present invention solves the problems such as by the big measuring result error brought, poor repeatability the methods of is visually observed.It can be used for the drop-down elevation carrection of the hoverheight of deposited particles and frivolous particle under different viscosities system.
Description
Technical field
The present invention relates to the measuring devices of solid suspension height, outstanding more particularly, to solid phase in a kind of transparent stirred tank of multiphase
The measuring device and measuring method of floating height.
Background technology
Stirring operation is widely used in many chemical processes such as sewage disposal, papermaking, metallurgy, usually presence during these
Solid-liquid multiphase medium.A boundary layer can be formed under specific speed of agitator, between solid phase rich region and supernatant liquor, from kettle
The distance of bottom to boundary layer is known as solid suspension height.During being stirred, the solid concentration base in solid phase rich region
This is consistent, but at solid liquid phase boundary layer, solid concentration will fall rapidly upon, to be generated to liquid phase mixed performance and mass transfer rate
Significant impact.In addition, when solid suspension height reaches 90% or so of liquid level, it is up to completely the bottom of from stirred tank
Suspended state, and have great importance completely to multiphase whipping process from bottom suspended state.Therefore, solid suspension height with turn
The variation of speed has important research and industrial value.
For the measurement method of solid suspension height, generally use observation method of naked eye at present, but due to the stream in stirred tank
It is dynamic sufficiently complex, show relaxed periodicity three-dimensional unstable state turbulence characteristic so that solid suspension height is in fluctuation status, and not
Measurement result difference with position is larger, the problems such as to bring measuring result error big, poor repeatability.
Invention content
The purpose of the present invention is to provide the measuring device of solid suspension height in a kind of transparent stirred tank of multiphase and measurements
Method can adapt to the drop-down elevation carrection of the hoverheight of deposited particles and frivolous particle under different viscosities system.
The technical solution adopted by the present invention is：
One, in a kind of transparent stirred tank of multiphase solid suspension height measuring device
The present invention includes tachometer of measuring, motor, transparent stirred tank, apart from object of reference, computer and digital camera；It will be digital
Camera is placed in front of transparent stirred tank, and solid liquid phase material is housed in transparent stirred tank, the transparent stirred tank of height where liquid level
External pasting is stretched to apart from object of reference, the agitating paddle of motor one end in the solid-liquid phase materials of transparent stirred tank, and motor is another
End is connected through tachometer of measuring with computer.
The color apart from object of reference and the color of solid-liquid phase materials have notable difference.
The color of solid-phase material in the solid-liquid phase materials and the color of liquid phase material also have notable difference.
Two, in a kind of transparent stirred tank of multiphase solid suspension height measurement method, include the following steps：
Solid-liquid phase materials are added into transparent stirred tank for step 1), and digital camera is placed in front of transparent stirred tank, adjust number
The distance of the setting of code camera and its placement, can clearly shoot transparent stirred tank, motor is through tachometer of measuring
It is connected with computer；
The transparent stirred tank external pasting of height where step 2) liquid level adjusts speed of agitator to rotating speed is measured, waits for apart from object of reference
Digital camera is opened after agitating paddle the operation is stable to be shot, and the image of transparent stirred tank is obtained；
Step 3) image is cut and after being cut image red, green or blue component；
Step 4) carries out binary conversion treatment to the red, green or blue color component value of image after cutting, according to binary conversion treatment knot
Solid suspension height is calculated with the data of height change in fruit.
Image is cut in the step 3) and after being cut image red, green or blue component, including
Following steps：
Step 3-1) image is cut, retain apart from object of reference and solid liquid phase region；
Step 3-2) obtain the picture element matrix of the red of image after cutting, green or blue component.
Binary conversion treatment is carried out to the red, green or blue color component value of image after cutting in the step 4), according to two
Value handling result is calculated solid suspension height, includes the following steps with the data of height change：
Step 4-1) any one row pixel is chosen as research object, obtain the red, green or blue point of the row all pixels
Magnitude and its corresponding picture element matrix line number value；
Step 4-2) it calculates the red of the row all pixels, the detection threshold of green or blue color component value and binaryzation is carried out to it
Processing is drawn using the line number value of the row pixel as abscissa, and the numerical value after binary conversion treatment is the curve of ordinate；
Step 4-3) judged apart from reference object area according to the mutation of the red of pixel, green or blue color component value in curve,
Supernatant liquor region and solid phase rich region；
The row numberical range apart from object of reference and supernatant liquor region respective pixel is obtained respectively, and calculates pixel in corresponding region
The line number occupied；
Step 4-4) following equation is utilized, solid suspension height Hc is calculated,
Hc=H-Rcl/Rre*Hre
In formula：H is liquid level in transparent stirred tank, and Rcl is the line number that pixel occupies in supernatant liquor region, and Rre is distance
With reference to the line number that pixel in object area occupies, Hre is the height value apart from object of reference, and the unit of Hc, H and Hre need to be consistent；
Repeat above-mentioned 4-1)~step 4-4), the solid suspension height of different column positions is obtained, and be averaged as final
Solid suspension height in transparent stirred tank.
The invention has the advantages that：
The present invention provides the measurement side of the transparent stirred tank solid suspension height of reliable multiphase for industrial production and experimental study
Method solves at present the problems such as by the big measuring result error brought, poor repeatability the methods of is visually observed.It has preferable
Adaptability, can be suitable for different viscosities system under deposited particles hoverheight and frivolous particle drop-down height survey
Amount；The present invention has preferable practical value.
Description of the drawings
Fig. 1 is the structural schematic diagram of measuring device of the present invention.
Fig. 2 is the schematic diagram for each curve that the embodiment of the present invention obtains.
In figure：1, tachometer of measuring, 2, motor, 3, transparent stirred tank, 4, apart from object of reference, 5, computer, 6, digital
Camera.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1, the present invention includes tachometer of measuring 1, motor 2, transparent stirred tank 3 is calculated apart from object of reference 4
Machine 5 and digital camera 6；Digital camera 6 is placed on 3 front of transparent stirred tank, solid liquid phase material is housed in transparent stirred tank 3,
For 3 external pasting of transparent stirred tank of height where liquid level apart from object of reference 4, the agitating paddle of 2 one end of motor stretches to transparent stirring
In the solid-liquid phase materials of kettle 3,2 other end of motor is connected through tachometer of measuring 1 and computer 5.
The color apart from object of reference 4 and the color of solid-liquid phase materials have notable difference.
The color of solid-phase material in the solid-liquid phase materials and the color of liquid phase material also have notable difference.
The embodiment of the present invention：
The operating mode that the present embodiment uses is as follows：Liquid phase gross mass 37.5kg, total volume 37.5L, solid phase gross mass 4kg, total volume
1.6L, liquid level 380mm in stirred tank.
Solid-liquid phase materials, after liquid level stabilizing, the transparent stirred tank of height where liquid level are added into transparent stirred tank 3
3 external pastings are apart from object of reference 4.Solid liquid phase is respectively quartz sand and water in the present embodiment, pastes the red adhesive tape that height is 10mm
As apart from object of reference 4.
Speed of agitator is adjusted to rotating speed is measured, opening digital camera 6 after paddle the operation is stable to be mixed is shot, and is obtained saturating
The image of bright stirred tank 3.
Image is cut, is retained apart from object of reference and solid liquid phase region.
Obtain the picture element matrix of the red, green or blue (RGB) component of image after cutting.
Any one row pixel is chosen as research object, obtains the red, green or blue (RGB) point of the row all pixels
Magnitude and its corresponding picture element matrix line number value.Image pixel is the matrix of 588*625 after being cut in the present embodiment, to choose the
520 row pixels are illustrated as research object.
It calculates the detection threshold of red, green or blue (RGB) component value of the row all pixels and two-value is carried out to it
Change is handled, and is drawn using the line number value of the row pixel as abscissa, and the numerical value after binary conversion treatment is the curve of ordinate.This implementation
It is analyzed using R (red) value in example, the detection threshold of the row pixel is calculated using maximum variance between clusters, value 107 will
R (red) value is more than 107 conduct 255, is less than or equal to 107 conduct 0, the R (red) of the front and back row all pixels of binary conversion treatment
It is worth the variation with picture element matrix line number value, as shown in Figure 2.
Judged apart from reference according to the mutation of the red of pixel, green or blue (RGB) component value in binaryzation curve
Object area, supernatant liquor region and solid phase rich region.Pixel occupies in 1 ~ 24 behavior image edge area in the present embodiment
Row numberical range, the row numberical range that 25 ~ 51 behaviors distance is occupied with reference to pixel in object area, 52 ~ 245 behavior supernatant liquor areas
The row numberical range that pixel occupies in domain, the row numberical range that pixel occupies in 245 ~ 588 behavior solid phase rich regions, distance ginseng
The line number occupied according to pixel in object area and supernatant liquor region is respectively 27 and 194.
Solid suspension height Hc is calculated using formula, formula is Hc=H-Rcl/Rre*Hre, in formula：H is liquid in stirred tank
Face height, Rcl are the line number that pixel occupies in supernatant liquor region, and Rre is the line number that distance is occupied with reference to pixel in object area,
Hre is the height value apart from object of reference.H is 380mm in the present embodiment, and Rcl 194, Rre 27, Hre 10mm are computed
Solid suspension height Hc is 308mm at the position.
It repeats the above steps, obtains the solid suspension height of different location, and be averaged as in final stirred tank
Solid suspension height.The solid suspension height of 10 positions is obtained in the present embodiment altogether, respectively：293mm、305mm、306mm、
309mm, 242mm, 284mm, 294mm, 298mm, 308mm, 296mm are averaged 294mm as solid phase in final stirred tank
Hoverheight.
The process of argumentation of above step is as follows：
In rgb color pattern, a variety of colors can pass through the change of red (R), green (G) and blue (B) three color components
Change and their mutual superpositions obtain.Due between object of reference, supernatant liquor region and solid phase rich region
There are the suddenly changes of color, by obtaining the red of survey region, the picture element matrix of green or blue (RGB) component, and root
According to red, green or blue (RGB) component value of pixel with the height i.e. mutation of the row numerical value change of picture element matrix, it can be determined that
Go out to shoot image middle-range from object of reference, supernatant liquor region and solid phase rich region.Known distance reference height is Hre, should
The line number that pixel occupies in region is Rre, the line number that pixel occupies in supernatant liquor region is Rcl, then supernatant liquor region
Height is Rcl/Rre*Hre.In view of the diversity of stirred tank bottom shape, and liquid level is horizontal plane, therefore high using liquid level
The method that degree subtracts supernatant liquor region height obtains solid suspension height, and solid suspension height Hc is H-Rcl/Rre*Hre.
In addition, the data that this method changes according to red, green or blue (RGB) component value in different height are come to solid phase
Hoverheight measures, and unrelated with the properties such as the viscosity of liquid phase, the shape of solid phase and density.So this method can fit
Should under different viscous systems the drop-down elevation carrection of the hoverheight of deposited particles and frivolous particle.
Above-mentioned specific implementation mode is used for illustrating the present invention, rather than limits the invention, the present invention's
In spirit and scope of the claims, to any modifications and changes that the present invention makes, the protection model of the present invention is both fallen within
It encloses.
Claims (6)
1. the measuring device of solid suspension height in a kind of transparent stirred tank of multiphase, it is characterised in that：Including tachometer of measuring
(1), motor (2), transparent stirred tank (3), apart from object of reference (4), computer (5) and digital camera (6)；By digital camera
(6) it is placed in front of transparent stirred tank (3), solid liquid phase material is housed in transparent stirred tank (3), the transparent of height where liquid level stirs
Kettle (3) external pasting is mixed apart from object of reference (4), the agitating paddle of motor (2) one end stretches to the solid liquid phase object of transparent stirred tank (3)
In material, motor (2) other end is connected through tachometer of measuring (1) and computer (5).
2. the measuring device of solid suspension height, feature exist in the transparent stirred tank of a kind of multiphase according to claim 1
In：The color apart from object of reference (4) and the color of solid-liquid phase materials have notable difference.
3. the measuring device of solid suspension height, feature exist in the transparent stirred tank of a kind of multiphase according to claim 1
In：The color of solid-phase material in the solid-liquid phase materials and the color of liquid phase material also have notable difference.
4. the measurement side for the measuring device of solid suspension height in the transparent stirred tank of a kind of multiphase described in claim 1-3
Method, which is characterized in that the measurement method includes the following steps：
Solid-liquid phase materials are added into transparent stirred tank for step 1), and digital camera is placed in front of transparent stirred tank, adjust number
The distance of the setting of code camera and its placement, can clearly shoot transparent stirred tank, motor is through tachometer of measuring
It is connected with computer；
The transparent stirred tank external pasting of height where step 2) liquid level adjusts speed of agitator to rotating speed is measured, waits for apart from object of reference
Digital camera is opened after agitating paddle the operation is stable to be shot, and the image of transparent stirred tank is obtained；
Step 3) image is cut and after being cut image red, green or blue component；
Step 4) carries out binary conversion treatment to the red, green or blue color component value of image after cutting, according to binary conversion treatment knot
Solid suspension height is calculated with the data of height change in fruit.
5. the measurement side of the measuring device of solid suspension height in the transparent stirred tank of a kind of multiphase according to claim 4
Method, it is characterised in that：Image is cut in the step 3) and after being cut image red, green or blue point
Amount, includes the following steps：
Step 1) cuts image, retains apart from object of reference and solid liquid phase region；
The picture element matrix of the red, green or blue component of image after step 2) acquisition is cut.
6. the measurement side of the measuring device of solid suspension height in the transparent stirred tank of a kind of multiphase according to claim 4
Method, it is characterised in that：Binary conversion treatment is carried out to the red, green or blue color component value of image after cutting in the step 4),
According to binary conversion treatment result with the data of height change, solid suspension height is calculated, includes the following steps：
Step 1) chooses any one row pixel as research object, obtains the red, green or blue component of the row all pixels
Value and its corresponding picture element matrix line number value；
Step 2) calculates the red of the row all pixels, the detection threshold of green or blue color component value and is carried out at binaryzation to it
Reason is drawn using the line number value of the row pixel as abscissa, and the numerical value after binary conversion treatment is the curve of ordinate；
Step 3) judges distance reference object area according to the mutation of the red of pixel, green or blue color component value in curve, on
Layer clear liquid region and solid phase rich region；
The row numberical range apart from object of reference and supernatant liquor region respective pixel is obtained respectively, and calculates pixel in corresponding region
The line number occupied；
Step 4) utilizes following equation, calculates solid suspension height Hc,
Hc=H-Rcl/Rre*Hre
In formula：H is liquid level in transparent stirred tank, and Rcl is the line number that pixel occupies in supernatant liquor region, and Rre is distance
With reference to the line number that pixel in object area occupies, Hre is the height value apart from object of reference, and the unit of Hc, H and Hre need to be consistent；
It repeats the above steps, obtains the solid suspension height of different column positions, and be averaged as final transparent stirred tank
Middle solid suspension height.
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| CN201810216477.1A CN108444391B (en) | 2018-03-16 | Measuring device and measuring method for solid phase suspension height in multiphase transparent stirring kettle |
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| CN201810216477.1A CN108444391B (en) | 2018-03-16 | Measuring device and measuring method for solid phase suspension height in multiphase transparent stirring kettle |
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| CN108444391B CN108444391B (en) | 2024-05-03 |
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