CN112973586B - Fluidized bed comprehensive monitoring system and method for tracking particle and spray motion - Google Patents
Fluidized bed comprehensive monitoring system and method for tracking particle and spray motion Download PDFInfo
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Abstract
The invention belongs to the field of fluidized bed monitoring, and particularly relates to a fluidized bed comprehensive monitoring system and a method for tracking particle and spray movement, wherein the fluidized bed comprehensive monitoring system for tracking particle and spray movement comprises: the device comprises a fluidized bed with visible two-dimensional motion, a particle velocity field analysis mechanism, a spray motion analysis mechanism and a control terminal; the two-dimensional motion visible fluidized bed comprises a cuboid-shaped fluidized bed; the particle velocity field analysis mechanism is arranged on the front side of the fluidized bed; the spray motion analysis mechanism is arranged on the side surface of the fluidized bed. The fluidized bed is visualized, the three-dimensional motion state is limited to two-dimensional motion through the structure of the fluidized bed, and the particles and liquid drops are respectively monitored through the particle velocity field analysis mechanism and the spray motion analysis mechanism, so that the influence of a spray area on the motion of fluidized particles can be analyzed and determined.
Description
Technical Field
The invention relates to the field of fluidized bed monitoring, in particular to a fluidized bed comprehensive monitoring system and method for tracking particle and spray motion.
Background
A fluidized bed is a reactor in which solid particles are in a suspended state by passing a gas or liquid through a granular solid layer and a gas-solid reaction process or a liquid-solid reaction process is performed. In the fluidized bed, the movement of particles is very complicated, and the fluidized particles are difficult to track by a non-invasive monitoring mode, so that the accurate observation of the movement state of the fluidized particles and the spray is particularly important for the scientific research and the digital simulation at the micro-scale level. At present, the conventional means can only measure the single-phase motion state of solid fluidized particles or spray, and the three-dimensional motion in the fluidized bed is more difficult to monitor. Therefore, how to effectively monitor and analyze fluidized particles and spray movement in a fluidized bed is urgently needed in the production and scientific research fields.
Disclosure of Invention
The invention aims to provide a fluidized bed comprehensive monitoring system and method for tracking particle and spray motion.
In order to solve the above technical problem, the present invention provides a fluidized bed integrated monitoring system for tracking particle and spray movement, comprising: the device comprises a fluidized bed with visible two-dimensional motion, a particle velocity field analysis mechanism, a spray motion analysis mechanism and a control terminal;
the two-dimensional motion visible fluidized bed comprises a cuboid-shaped fluidized bed;
the particle velocity field analysis mechanism is arranged on the front side of the fluidized bed and is suitable for monitoring the velocity fields of all fluidized particles in the fluidized bed;
the spray motion analysis mechanism is arranged on the side surface of the fluidized bed and is suitable for monitoring the particle size distribution of sprayed liquid drops in the fluidized bed;
the control terminal is respectively and electrically connected with the particle velocity field analysis mechanism and the spray motion analysis mechanism, and is suitable for quantifying the influence relation between particles and spray in the fluidized bed according to the particle velocity field of the particles and the particle size distribution of liquid drops.
Further, the two-dimensional motion visible fluidized bed further comprises:
the device comprises an air inlet mechanism, a distribution plate, a double-fluid-phase nozzle and a plurality of fluidized particles;
the distribution plate is arranged at the bottom of the fluidized bed, and a plurality of fluidized particles are arranged above the distribution plate;
the two-phase nozzle is arranged at the upper part of the fluidized bed;
the air inlet mechanism is communicated with the fluidized bed, is arranged below the distribution plate and is suitable for loading fluidized gas to the fluidized bed.
Further, a part of the fluidized particles is made of a temperature sensitive material.
Further, the particle velocity field analysis mechanism comprises a high-speed camera and a particle velocity field controller electrically connected with the high-speed camera; the particle velocity field controller is adapted to control the high speed camera to capture a motion image of fluidized particles within the fluidized bed and analyze the motion image to obtain a velocity field of the fluidized particles.
Further, the spray motion analysis mechanism comprises a phase doppler particle analyzer and a spray analysis controller electrically connected with the phase doppler particle analyzer;
the phase Doppler particle analyzer comprises a laser emitting end and a laser receiving end which are arranged on two sides of the fluidized bed, and the laser emitting end emits laser and then penetrates through the spray area to be received by the laser receiving end;
the spray analysis controller is adapted to obtain a particle size distribution of droplets in the spray based on the received laser light.
The invention also provides a fluidized bed comprehensive monitoring method for tracking particle and spray movement, which comprises the following steps:
controlling the fluidized bed with visible two-dimensional motion to start fluidization;
monitoring the velocity field of all fluidized particles in the fluidized bed;
monitoring the particle size distribution of the sprayed droplets in the fluidized bed;
and quantifying the influence relationship between the particles and the spray in the fluidized bed according to the velocity field of the particles and the particle size distribution of the liquid drops.
Further, before the fluidized bed with visible two-dimensional motion is controlled to start fluidization, the method for comprehensively monitoring the fluidized bed with particle tracking and spraying motion further comprises the following steps:
the fluidized particles in the fluidized bed are coated with a tracer material.
Further, the method for monitoring the velocity field of all fluidized particles in the fluidized bed comprises the following steps:
selecting a square fitting area with a preset area at the center part of the complete fluidization of the fluidized particles in the fluidized bed in historical data, and establishing a rectangular coordinate system by using the adjacent two sides of the square as an X axis and a Y axis in the fitting area;
initiating particle fluidization of fluidized particles in the fluidized bed;
capturing the motion state of the particles by a high-speed camera, and taking two pictures of the fluidized particles coated with the tracer substance at intervals of preset time;
and processing two pictures obtained by a high-speed camera in the established rectangular coordinate system by a tracking speed measurement method to obtain the velocity fields of all fluidized particles.
Further, the method of monitoring the particle size distribution of sprayed droplets in a fluidized bed comprises:
establishing a new rectangular coordinate system with the same area at the same position of a square fitting area in the method for monitoring the velocity fields of all fluidized particles in the fluidized bed;
after laser emitted by a laser emitting end erected on the side surface of the fluidized bed penetrates through spray, the laser is received by a laser receiving end to form an optical channel, and a static image of the liquid drop characteristics in a spray area is fitted by analyzing the deflection and attenuation degree of the optical channel;
spray droplet particles in a static image of droplet characteristics in a fitting spray area are extracted through Hough circle monitoring to obtain a spray area and the particle size distribution of droplets;
and substituting the spraying area and the particle size distribution into a newly established rectangular coordinate system.
Further, the method for quantifying the influence relationship between the particles and the spray in the fluidized bed according to the velocity field of the particles and the particle size distribution of the liquid drops comprises the following steps:
merging a rectangular coordinate system in a method for monitoring the velocity field of all fluidized particles in the fluidized bed with a rectangular coordinate system in a method for monitoring the particle size distribution of sprayed liquid drops in the fluidized bed;
simultaneously acquiring a velocity field and particle size distribution at each site;
selecting the particle size distribution of particles and liquid drops on the same site at different times for multiple times, and analyzing the influence of spraying on the particles at different times;
and analyzing the motion influence of the spray on particles at different positions of the bed layer by comparing the influence relationship of different point positions.
The invention has the beneficial effects that the invention provides a fluidized bed comprehensive monitoring system and a method for tracking particle and spray movement, wherein the fluidized bed comprehensive monitoring system for tracking particle and spray movement comprises: the device comprises a fluidized bed with visible two-dimensional motion, a particle velocity field analysis mechanism, a spray motion analysis mechanism and a control terminal; the two-dimensional motion visible fluidized bed comprises a cuboid-shaped fluidized bed; the particle velocity field analysis mechanism is arranged on the front side of the fluidized bed and is suitable for monitoring the velocity fields of all fluidized particles in the fluidized bed; the spray motion analysis mechanism is arranged on the side surface of the fluidized bed and is suitable for monitoring the particle size distribution of sprayed liquid drops in the fluidized bed; the control terminal is respectively and electrically connected with the particle velocity field analysis mechanism and the spray motion analysis mechanism, and is suitable for quantifying the influence relation between particles and spray in the fluidized bed according to the particle velocity field of the particles and the particle size distribution of liquid drops. The fluidized bed is visualized, the three-dimensional motion state is limited to two-dimensional motion through the structure of the fluidized bed, and the particles and liquid drops are respectively monitored through the particle velocity field analysis mechanism and the spray motion analysis mechanism, so that the influence of a spray area on the motion of fluidized particles can be analyzed and determined.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural diagram of a fluidized bed integrated monitoring system for tracking particle and spray motion provided by the present invention.
FIG. 2 is a flow chart of the method for monitoring the fluidized bed by tracking the movement of particles and spray.
Fig. 3 is a partial functional block diagram of an electronic device provided by the present invention.
In the figure: 110-a fluidized bed; 111-an air intake mechanism; 112-a distribution plate; 113-two-phase nozzle; 114-a particle collector; 115-a light supplement lamp; 121-high speed camera; 122-particle velocity field controller; 131-phase doppler particle analyzer; 132-spray analysis controller.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Example 1
As shown in fig. 1, this example 1 provides a fluidized bed integrated monitoring system for tracking the movement of particles and spray. The fluidized bed integrated monitoring system for tracking particle and spray motion comprises: the device comprises a fluidized bed 110 with visible two-dimensional motion, a particle velocity field analysis mechanism, a spray motion analysis mechanism and a control terminal; the two-dimensional motion visualized fluidized bed 110 comprises a rectangular parallelepiped fluidized bed 110; the particle velocity field analyzing mechanism is arranged on the front surface of the fluidized bed 110 and is suitable for monitoring the velocity field of all fluidized particles in the fluidized bed 110; the spray motion analysis mechanism is disposed at a side of the fluidized bed 110 and adapted to monitor a particle size distribution of droplets sprayed in the fluidized bed 110; the control terminal is electrically connected to the particle velocity field analysis mechanism and the spray motion analysis mechanism, respectively, and is adapted to quantify the influence relationship between particles and spray in the fluidized bed 110 according to the particle velocity field and the particle size distribution of the droplets.
The two-dimensional visible fluidized bed 110 is a rectangular parallelepiped structure with a cavity, and the front, back, left, and right surfaces are made of acrylic panels or other transparent materials.
In this embodiment, the two-dimensional motion visible fluidized bed 110 further comprises: an air inlet mechanism 111, a distribution plate 112, a plurality of fluidized particles, and a two-fluid phase nozzle 113; the distribution plate 112 is disposed at the bottom of the fluidized bed 110, and a plurality of the fluidized particles are disposed above the distribution plate 112; the two-phase nozzle 113 is disposed in the upper portion of the fluidized bed 110; the gas inlet mechanism 111 is in communication with the fluidized bed 110 and disposed below the distribution plate 112, and is adapted to load the fluidized bed 110 with a fluidizing gas.
Wherein, when the gas is fluidized, the air inlet mechanism 111 adopts compressed air directly generated by an air compressor, and the compressed air is heated according to the drying requirement before entering the fluidized bed 110.
In this embodiment, the material of the distribution plate 112 is a metal sintered mesh, or a perforated steel plate designed. The fluidizing gas passes through the distribution plate 112 and into the fluidized bed 110 to provide uniform gas entry into the bed.
The two-phase nozzle 113 is a gas-liquid two-phase nozzle for atomizing liquid into small particles and spraying the small particles onto the bed particles of the fluidized bed 110 uniformly by the gas pressure of the gas.
In this embodiment, the fluidized particles are made of temperature sensitive material, and the fluidized particles show different color states with different temperatures in the fluidizing process.
In this embodiment, the two-dimensional motion visible fluidized bed 110 further includes a particle collector 114 located at the top of the fluidized bed 110, and escaping powder in the fluidized bed 110 is collected by the particle collector 114 to prevent the powder from entering air. The particle collector 114 in this embodiment is rectangular in shape, adapted to the top structure of the fluidized bed 110.
In the present embodiment, the particle velocity field analysis mechanism includes a high-speed camera 121 and a particle velocity field controller 122 electrically connected to the high-speed camera 121; the particle velocity field controller 122 is adapted to control the high speed camera 121 to capture moving images of fluidized particles within the fluidized bed 110 and analyze the moving images to obtain a velocity field of the fluidized particles.
Specifically, the particle velocity field controller is adapted to control the high-speed camera to capture a moving image of the fluidized particles in the fluidized bed 110 and analyze the moving image to obtain a velocity field of the fluidized particles as follows:
s121: a square fitting region with a preset area is selected at the central part of the fluidized bed in which the fluidized particles are completely fluidized in historical data, and a rectangular coordinate system is established by using the adjacent two sides of the square as an X axis and a Y axis in the fitting region.
S122: the particle motion state was captured by a high speed camera, taking two pictures of the fluidized particles coated with tracer substance at preset time intervals.
In this embodiment, track fluidized bed integrated monitoring system of granule and spraying motion still includes the light filling lamp for carry out the light filling when shooing for high-speed camera, specifically, the photo that the high-speed camera was shot the fluidization granule adopts the backlight method to shoot, promptly, has the part of granule to be the shade form to the precision of shooing has been improved.
S123: and processing two pictures obtained by a high-speed camera in the established rectangular coordinate system by a tracking speed measurement method to obtain the velocity fields of all fluidized particles.
Specifically, the Voronoi tracking algorithm relaxation probability tracking algorithm is adopted as the core calculation method in step S123.
S1231: the position of the particle in the coordinate system in the positioning picture is calculated by the following formula
Wherein, I (I, j) is the matrix intensity of the non-particle area in the original image, S (I, j) is the matrix intensity of the particle area, and I and S are the average matrix intensity of the interval area between the particle area and the non-particle area in the original image; x, y are points in a coordinate system, and since the average standard particle is defined as a square matrix, m is the value of the row and column of the matrix of average standard particles, and has a size of
Individual pixel points (rounded to the nearest whole).
Note:
is the particle diameter of the particles [ mm ]];
Is a scale bar [ pixel/mm]。
The formula is based on a Voronoi method for determining a formula of a particle region space, in order to define a particle region in a known image, and the main idea of a Voronoi mesh polygon is to create a region for a point, so that its region (polygon) is only affected by core points.
Voronoi mesh polygon definition:
1: suppose n points P1, P2, P3 … Pn are randomly generated in a plane, all points not being collinear;
2: selecting a point P1 as a reference point, and connecting other n-1 points with P1 as a starting point;
3: making a perpendicular line for each line segment, wherein n-1 perpendicular lines are intersected to form a plurality of polygons;
4: a polygon surrounded by the perpendicular bisector closest to the reference point P1 is a Voronoi polygon with the point P1, and the polygon does not include other reference points;
5: and sequentially selecting other points as reference points to solve the Voronoi polygon.
S1232: after determining the center position of the particle, the corresponding single particle velocityThe degree can be calculated according to the principle formula as follows, wherein the corner marks 1 and 2 are respectively the two particle positions at adjacent moments:
；
in the formula (I), the compound is shown in the specification,
representing the velocity of a single particle p in the x-direction,
representing the velocity of a single particle p in the y-direction,x 1a coordinate in the x-axis direction representing the position of the particle p in the preceding one of the adjacent time instants,x 2a coordinate in the x-axis direction representing the position of the particle p at a later one of the adjacent time instants,y 1a coordinate in the y-axis direction indicating the position of the particle p at the preceding one of the adjacent time instants,y 2a coordinate in the y-axis direction indicating a position where the particle p is located in a later one of the adjacent time instants,
representing the time difference between adjacent time instants.
S1233: and replacing the corresponding speed of each particle back to the original position point of the center of the particle in the square fitting region with the preset area to obtain the speed field of the fitting region.
In this embodiment, the spray motion analysis mechanism includes a phase doppler particle analyzer 131 and a spray analysis controller 132 electrically connected to the phase doppler particle analyzer 131; the phase doppler particle analyzer 131 includes a laser emitting end and a laser receiving end which are disposed at two sides of the fluidized bed 110, and the laser emitting end emits laser and then passes through a spray region to be received by the laser receiving end; the spray analysis controller 132 is adapted to obtain a particle size distribution of the droplets in the spray from the received laser light.
Specifically, the analysis process of the spray motion analysis mechanism is as follows:
s131: establishing a new rectangular coordinate system with the same area at the same position of a square fitting area in the method for monitoring the velocity fields of all fluidized particles in the fluidized bed;
s132: after laser emitted by a laser emitting end erected on the side surface of the fluidized bed penetrates through spray, the laser is received by a laser receiving end to form an optical channel, and a static image of the liquid drop characteristics in a spray area is fitted by analyzing the deflection and attenuation degree of the optical channel;
s133: spray droplet particles in a static image of droplet characteristics in a fitting spray area are extracted through Hough circle monitoring to obtain a spray area and the particle size distribution of droplets;
s134: and substituting the spraying area and the particle size distribution into a newly established rectangular coordinate system.
In this embodiment, the process of quantifying the influence relationship between the particles and the spray in the fluidized bed 110 by the control terminal according to the velocity field of the particles and the particle size distribution of the droplets is as follows:
s141: merging a rectangular coordinate system in a method for monitoring the velocity field of all fluidized particles in the fluidized bed with a rectangular coordinate system in a method for monitoring the particle size distribution of sprayed liquid drops in the fluidized bed;
s142: simultaneously acquiring a velocity field and particle size distribution at each site;
s143: selecting the particle size distribution of particles and liquid drops on the same site at different times for multiple times, and analyzing the influence of spraying on the particles at different times;
s144: and analyzing the motion influence of the spray on particles at different positions of the bed layer by comparing the influence relationship of different point positions.
Example 2
Referring to fig. 2, the present embodiment provides a method for monitoring a fluidized bed by tracking the movement of particles and spray. The fluidized bed is visualized, the three-dimensional motion state is limited to two-dimensional motion through the structure of the fluidized bed, and the particles and liquid drops are respectively monitored through the particle velocity field analysis mechanism and the spray motion analysis mechanism, so that the influence of a spray area on the motion of fluidized particles can be analyzed and determined.
Specifically, the method for comprehensively monitoring the fluidized bed by tracking the movement of particles and spray comprises the following steps:
s110: the fluidized bed with visible two-dimensional motion is controlled to start fluidization.
In particular, the integrated fluid bed monitoring method of tracking particle and spray motion further comprises applying a tracer substance to fluidized particles in the fluid bed prior to controlling the two-dimensional motion-visible fluid bed to initiate fluidization.
S120: the velocity field of all fluidized particles in the fluidized bed is monitored.
Specifically, step S120 includes the steps of:
s121: a square fitting region with a preset area is selected at the central part of the fluidized bed in which the fluidized particles are completely fluidized in historical data, and a rectangular coordinate system is established by using the adjacent two sides of the square as an X axis and a Y axis in the fitting region.
S122: the particle motion state was captured by a high speed camera, taking two pictures of the fluidized particles coated with tracer substance at preset time intervals.
In this embodiment, track fluidized bed integrated monitoring system of granule and spraying motion still includes the light filling lamp for carry out the light filling when shooing for high-speed camera, specifically, the photo that the high-speed camera was shot the fluidization granule adopts the backlight method to shoot, promptly, has the part of granule to be the shade form to the precision of shooing has been improved.
S123: and processing two pictures obtained by a high-speed camera in the established rectangular coordinate system by a tracking speed measurement method to obtain the velocity fields of all fluidized particles.
In the present embodiment, the Voronoi tracking algorithm relaxation probability tracking algorithm is adopted as the core calculation method in step S123.
S1231: the position of the particle in the coordinate system in the positioning picture is calculated by the following formula
WhereinI (I, j) is the matrix intensity of a non-particle area in the original image, S (I, j) is the matrix intensity of a particle area, and I and S are the average matrix intensity of a particle area and a non-particle area in the original image; x, y are points in a coordinate system, and since the average standard particle is defined as a square matrix, m is the value of the row and column of the matrix of average standard particles, and has a size of
Individual pixel points (rounded to the nearest whole).
Note:
is the particle diameter of the particles [ mm ]];
Is a scale bar [ pixel/mm]。
The formula is based on a Voronoi method to determine a formula of a particle region space, and aims to define the particle region in a known image
The main idea of Voronoi mesh polygons is to create regions for points such that their regions (polygons) are only affected by core points.
Voronoi mesh polygon definition:
1: suppose n points P1, P2, P3 … Pn are randomly generated in a plane, all points not being collinear;
2: selecting a point P1 as a reference point, and connecting other n-1 points with P1 as a starting point;
3: making a perpendicular line for each line segment, wherein n-1 perpendicular lines are intersected to form a plurality of polygons;
4: a polygon surrounded by the perpendicular bisector closest to the reference point P1 is a Voronoi polygon with the point P1, and the polygon does not include other reference points;
5: and sequentially selecting other points as reference points to solve the Voronoi polygon.
S1232: after determining the center position of the particle, the corresponding velocity of a single particle can be calculated according to the principle formula as follows, wherein the corner marks 1 and 2 are the two particle positions at adjacent moments respectively:
in the formula (I), the compound is shown in the specification,
representing the velocity of a single particle p in the x-direction,
representing the velocity of a single particle p in the y-direction,x 1a coordinate in the x-axis direction representing the position of the particle p in the preceding one of the adjacent time instants,x 2a coordinate in the x-axis direction representing the position of the particle p at a later one of the adjacent time instants,y 1a coordinate in the y-axis direction indicating the position of the particle p at the preceding one of the adjacent time instants,y 2a coordinate in the y-axis direction indicating a position where the particle p is located in a later one of the adjacent time instants,
representing the time difference between adjacent time instants.
S1233: and replacing the corresponding speed of each particle back to the original position point of the center of the particle in the square fitting region with the preset area to obtain the speed field of the fitting region.
In this embodiment, the spray motion analysis mechanism includes a phase doppler particle analyzer and a spray analysis controller electrically connected to the phase doppler particle analyzer; the phase Doppler particle analyzer comprises a laser emitting end and a laser receiving end which are arranged on two sides of the fluidized bed, and the laser emitting end emits laser and then penetrates through the spray area to be received by the laser receiving end; the spray analysis controller is adapted to obtain a particle size distribution of droplets in the spray based on the received laser light.
In the embodiment, part of fluidized particles are made of temperature-sensitive materials, the fluidized particles have different gray values in images obtained by a high-speed camera due to different temperatures, after the particle boundaries are qualitatively determined by gray gradient analysis, the gray matrixes of different pixel points are used for counting, so that the temperature value of each particle in the processed images can be obtained, and the temperature value is replaced into a tracking algorithm to solve the temperature field of the solid particles in the fluidized bed, so that monitoring data are provided for analyzing the influence of spray on the temperature of the fluidized particles, and the subsequent analysis on the temperature is facilitated.
In this embodiment, some of the fluidized particles are humidity indicating materials, i.e., the colors of the fluidized particles are different when the humidity is different, such as an insoluble nano humidity indicating material provided in publication No. CN 201410821958.7. The part of fluidized particles have different gray values in images obtained by a high-speed camera due to different humidity, after the particle boundaries are qualitatively determined by gray gradient analysis, the humidity values of the particles in the processed images can be obtained by counting the gray matrixes of different pixel points, and the humidity field of the solid particles in the fluidized bed can be solved by replacing the humidity values in a tracking algorithm, so that monitoring data are provided for analyzing the influence of spray on the humidity of the fluidized particles, and the subsequent humidity analysis is facilitated.
S130: monitoring the particle size distribution of the sprayed droplets in the fluidized bed;
specifically, step S130 includes the steps of:
s131: establishing a new rectangular coordinate system with the same area at the same position of a square fitting area in the method for monitoring the velocity fields of all fluidized particles in the fluidized bed;
s132: after laser emitted by a laser emitting end erected on the side surface of the fluidized bed penetrates through spray, the laser is received by a laser receiving end to form an optical channel, and a static image of the liquid drop characteristics in a spray area is fitted by analyzing the deflection and attenuation degree of the optical channel;
s133: spray droplet particles in a static image of droplet characteristics in a fitting spray area are extracted through Hough circle monitoring to obtain a spray area and the particle size distribution of droplets;
s134: and substituting the spraying area and the particle size distribution into a newly established rectangular coordinate system.
S140: and quantifying the influence relationship between the particles and the spray in the fluidized bed according to the velocity field of the particles and the particle size distribution of the liquid drops.
In the present embodiment, step S140 includes the following steps:
s141: merging a rectangular coordinate system in a method for monitoring the velocity field of all fluidized particles in the fluidized bed with a rectangular coordinate system in a method for monitoring the particle size distribution of sprayed liquid drops in the fluidized bed;
s142: simultaneously acquiring a velocity field and particle size distribution at each site;
s143: selecting the particle size distribution of particles and liquid drops on the same site at different times for multiple times, and analyzing the influence of spraying on the particles at different times;
s144: and analyzing the motion influence of the spray on particles at different positions of the bed layer by comparing the influence relationship of different point positions.
Example 3
Embodiments of the present invention provide a computer-readable storage medium, in which one or more instructions are stored, and when executed by a processor, the one or more instructions implement the method for monitoring a fluidized bed that tracks movement of particles and spray provided in embodiment 2.
In this embodiment, the fluidized bed is visualized, and the three-dimensional motion state is defined as two-dimensional motion by the structure of the fluidized bed, and at this time, the particle velocity field analysis mechanism and the spray motion analysis mechanism monitor the particle and the liquid drop respectively, so as to analyze and determine the influence of the spray region on the motion of the fluidized particles.
Example 4
Referring to fig. 3, an embodiment of the present invention further provides an electronic device, which includes a memory 502 and a processor 501; the memory 502 has at least one program instruction stored therein; the processor 501, by loading and executing the at least one program instruction, implements the method for integrated fluid bed monitoring that tracks particle and spray motion as provided in example 2.
The memory 502 and the processor 501 are coupled in a bus that may include any number of interconnected buses and bridges that couple one or more of the various circuits of the processor 501 and the memory 502 together. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 501 is transmitted over a wireless medium through an antenna, which further receives the data and transmits the data to the processor 501.
The processor 501 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 502 may be used to store data used by processor 501 in performing operations.
In summary, the present invention provides a fluidized bed comprehensive monitoring system and method for tracking movement of particles and spray, wherein the fluidized bed comprehensive monitoring system for tracking movement of particles and spray comprises: the device comprises a fluidized bed with visible two-dimensional motion, a particle velocity field analysis mechanism, a spray motion analysis mechanism and a control terminal; the two-dimensional motion visible fluidized bed comprises a cuboid-shaped fluidized bed; the particle velocity field analysis mechanism is arranged on the front side of the fluidized bed and is suitable for monitoring the velocity fields of all fluidized particles in the fluidized bed; the spray motion analysis mechanism is arranged on the side surface of the fluidized bed and is suitable for monitoring the particle size distribution of sprayed liquid drops in the fluidized bed; the control terminal is respectively and electrically connected with the particle velocity field analysis mechanism and the spray motion analysis mechanism, and is suitable for quantifying the influence relation between particles and spray in the fluidized bed according to the particle velocity field of the particles and the particle size distribution of liquid drops. The fluidized bed is visualized, the three-dimensional motion state is limited to two-dimensional motion through the structure of the fluidized bed, and the particles and liquid drops are respectively monitored through the particle velocity field analysis mechanism and the spray motion analysis mechanism, so that the influence of a spray area on the motion of fluidized particles can be analyzed and determined.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (1)
1. A method for integrated fluid bed monitoring that tracks particle and spray motion, the method comprising:
controlling the fluidized bed with visible two-dimensional motion to start fluidization;
monitoring the velocity field of all fluidized solid particles in the fluidized bed;
monitoring the particle size distribution of the sprayed droplets in the fluidized bed;
quantifying the influence relationship between the solid particles and the spray in the fluidized bed according to the velocity field of the solid particles and the particle size distribution of the liquid drops;
before the fluidized bed with visible two-dimensional motion is controlled to start fluidization, the method for comprehensively monitoring the fluidized bed with the tracking solid particles and the spraying motion further comprises the following steps:
applying a tracer substance to fluidized solid particles in the fluidized bed;
the method of monitoring the velocity field of all fluidized solid particles in a fluidized bed comprises:
selecting a square fitting area with a preset area at the center part of the fluidized solid particles in the fluidized bed in historical data, and establishing a rectangular coordinate system by using the adjacent two sides of the square as an X axis and a Y axis in the fitting area;
capturing the motion state of the solid particles through a high-speed camera, and taking two pictures of the fluidized solid particles coated with the tracer substances at intervals of preset time;
processing two pictures obtained by a high-speed camera in the established rectangular coordinate system by a tracking speed measurement method to obtain the velocity fields of all fluidized solid particles;
the method of monitoring the particle size distribution of sprayed droplets in a fluidized bed comprises:
establishing a new rectangular coordinate system with the same area at the same position of a square fitting area in the method for monitoring the velocity fields of all fluidized solid particles in the fluidized bed;
after laser emitted by a laser emitting end erected on the side surface of the fluidized bed penetrates through spray, the laser is received by a laser receiving end to form an optical channel, and a static image of the liquid drop characteristics in a spray area is fitted by analyzing the deflection and attenuation degree of the optical channel;
extracting solid particles of the spray liquid drops in the static image of the liquid drop characteristics in the fitting spray area through Hough circle monitoring to obtain a spray area and the particle size distribution of the liquid drops;
substituting the spraying area and the particle size distribution into a newly established rectangular coordinate system;
the method for quantifying the influence relation of the solid particles and the spray in the fluidized bed according to the velocity field of the solid particles and the particle size distribution of the liquid drops comprises the following steps:
merging a rectangular coordinate system in a method for monitoring the velocity field of all fluidized solid particles in the fluidized bed with a rectangular coordinate system in a method for monitoring the particle size distribution of sprayed liquid drops in the fluidized bed;
simultaneously acquiring a velocity field and particle size distribution at each site;
selecting the velocity field of the solid particles and the particle size distribution of liquid drops on the same site at different times for multiple times, and analyzing the influence of spraying on the solid particles at different times;
and analyzing the motion influence of the spray on the solid particles at different positions of the bed layer by comparing the influence relationship of different point positions.
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