CN207881639U - The measuring device of solid suspension height in a kind of transparent stirred tank of multiphase - Google Patents
The measuring device of solid suspension height in a kind of transparent stirred tank of multiphase Download PDFInfo
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- CN207881639U CN207881639U CN201820356977.0U CN201820356977U CN207881639U CN 207881639 U CN207881639 U CN 207881639U CN 201820356977 U CN201820356977 U CN 201820356977U CN 207881639 U CN207881639 U CN 207881639U
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Abstract
The utility model discloses the measuring devices of solid suspension height in a kind of transparent stirred tank of multiphase.The device includes tachometer of measuring, motor, transparent stirred tank, apart from object of reference, computer and digital camera.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 liquid level 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 utility model 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 utility model is related to the measuring devices of solid suspension height, more particularly, to solid in a kind of transparent stirred tank of multiphase
The measuring device of phase hoverheight.
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.
Utility model content
The purpose of this utility model is to provide the measuring device of solid suspension height in a kind of transparent stirred tank of multiphase, energy
Enough it is adapted to the drop-down elevation carrection of the hoverheight of deposited particles and frivolous particle under different viscosities system.
The technical solution adopted in the utility model is：
The utility model includes tachometer of measuring, motor, transparent stirred tank, apart from object of reference, computer and digital phase
Machine；Digital camera is placed in front of transparent stirred tank, solid liquid phase material is housed in transparent stirred tank, height is saturating where liquid level
Bright stirred tank 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, electricity
The motivation other 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.
The utility model has an advantageous effect in that：
The utility model provides the transparent stirred tank solid suspension height of reliable multiphase for industrial production and experimental study
Measurement method, solve at present the problems such as by the big measuring result error brought, poor repeatability the methods of is visually observed.It
With well adapting to property, the hoverheight of deposited particles and the drop-down of frivolous particle under different viscosities system can be suitable for
Elevation carrection；The utility model has preferable practical value.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model measuring device.
Fig. 2 is the schematic diagram for each curve that the utility model embodiment 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 utility model is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the utility model includes tachometer of measuring 1, motor 2, transparent stirred tank 3, apart from object of reference 4,
Computer 5 and digital camera 6；Digital camera 6 is placed on 3 front of transparent stirred tank, solid liquid phase object is housed in transparent stirred tank 3
Material, 3 external pasting of transparent stirred tank of height where solid liquid phase material liquid surface apart from object of reference 4, stretch by the agitating paddle of 2 one end of motor
Enter into the solid-liquid phase materials of transparent stirred tank 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 embodiments 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, always
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 red (R), green (G) and blue (B) three color components
Variation and their mutual superpositions obtain.Due to apart from object of reference, supernatant liquor region and solid phase rich region
Between there are the suddenly change of color, by obtaining the red of survey region, the picture element matrix of green or blue (RGB) component,
And according to red, green or blue (RGB) component value of pixel be the mutation of the row numerical value change of picture element matrix with height, it can be with
Judge to shoot image middle-range from object of reference, supernatant liquor region and solid phase rich region.Known distance reference height is
Hre, the line number that pixel occupies in the region are Rre, and the line number that pixel occupies in supernatant liquor region is Rcl, then supernatant liquor
The height in region is Rcl/Rre*Hre.In view of the diversity of stirred tank bottom shape, and liquid level is horizontal plane, therefore is used
The method that liquid level 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 utility model, rather than limits the utility model,
In the spirit and scope of the claims of the utility model, to any modifications and changes that the utility model is made, all fall
Enter the scope of protection of the utility model.
Claims (3)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820356977.0U CN207881639U (en) | 2018-03-16 | 2018-03-16 | The measuring device of solid suspension height in a kind of transparent stirred tank of multiphase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820356977.0U CN207881639U (en) | 2018-03-16 | 2018-03-16 | The measuring device of solid suspension height in a kind of transparent stirred tank of multiphase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207881639U true CN207881639U (en) | 2018-09-18 |
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ID=63497179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820356977.0U Active CN207881639U (en) | 2018-03-16 | 2018-03-16 | The measuring device of solid suspension height in a kind of transparent stirred tank of multiphase |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207881639U (en) |
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2018
- 2018-03-16 CN CN201820356977.0U patent/CN207881639U/en active Active
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