CN113804679A - Device and method for detecting gas-liquid-solid three-phase gas dispersion performance of flotation equipment - Google Patents
Device and method for detecting gas-liquid-solid three-phase gas dispersion performance of flotation equipment Download PDFInfo
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- CN113804679A CN113804679A CN202110984152.XA CN202110984152A CN113804679A CN 113804679 A CN113804679 A CN 113804679A CN 202110984152 A CN202110984152 A CN 202110984152A CN 113804679 A CN113804679 A CN 113804679A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
- B03D1/028—Control and monitoring of flotation processes; computer models therefor
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
The invention provides a device and a method for detecting gas-liquid-solid three-phase gas dispersion performance of flotation equipment, and belongs to the technical field of mineral processing. The device comprises an upper computer, a fixed end, a mechanical arm, a sampling cylinder, a light source, a high-speed dynamic camera, a power supply, a microprocessor, a wireless transmitter, a memory, a wireless base station, a power line and a communication line, wherein the power supply is connected with the microprocessor, the wireless transmitter and the memory, the light source and the high-speed dynamic camera are connected with the microprocessor, and the microprocessor is connected with the wireless transmitter and the memory. The device can realize the real-time direct detection of the gas dispersion state in the gas-liquid-solid three-phase ore pulp in the flotation process, can be applied to the guidance of the amplification and research and development of flotation equipment and the research on the flotation process and mechanism, has strong practicability and is easy to realize, and provides a technical means for the research on the gas dispersion state in the mineral processing flotation process.
Description
Technical Field
The invention relates to the technical field of mineral processing, in particular to a device and a method for detecting gas-liquid-solid three-phase gas dispersion performance of flotation equipment.
Background
Flotation is one of the most widely used methods in mineral separation, wherein the dispersion of gas directly influences the flotation effect and is closely related to flotation indexes, and dispersion parameters mainly comprise bubble size, gas content, motion state and the like. The size of the bubbles determines the surface area of the bubbles in contact with solid particles, plays an important role in the hydrodynamic environment of flotation, and influences the flotation rate and the flotation selectivity; the gas content is the volume of gas phase in the ore pulp mixture, and is directly related to flotation dynamics and the bearing capacity of equipment; the state of motion of the bubbles is then closely related to the flotation mixing state and the fluid dynamics. The research on the dispersion state of the bubbles has important significance for researching the flotation process, adjusting the flotation parameters and improving the flotation indexes.
At present, the equipment and the method for testing the gas dispersion state in multiphase flow mainly comprise a heat transfer probe, a capillary probe, a Particle Image Velocimetry (PIV) technology and a Laser Doppler Velocimetry (LDV) technology. The heat transfer probe and the capillary probe are only suitable for gas-liquid two-phase mixtures and have strict requirements on the environment, and a Particle Image Velocimetry (PIV) technology and a Laser Doppler Velocimetry (LDV) technology can be applied to the gas-liquid-solid three-phase mixtures, but the systems are required to be transparent, the gas content cannot be effectively measured when the gas content is low, and the gas dispersion state detection method is difficult to be applied to the detection of the gas dispersion state in the flotation process. The existing fluid mechanics simulation software greatly simplifies research objects and uses more ideal fluid mechanics mathematical models, so that errors which cannot be eliminated exist between a simulation result and a real state, and the truest and most intuitive data cannot be obtained. The detection of the gas dispersion state in the flotation process is relatively blank, and the development of the flotation process is severely restricted. The invention can realize real-time visual observation of the dispersion state of the bubbles at each position of the slurry in the flotation equipment, obtains the data of the bubble size, the gas content, the bubble movement speed and the like through software processing, and provides an important research technical means for guiding the amplification and research of the flotation equipment and the flotation process and mechanism research.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device and a method for detecting the gas-liquid-solid three-phase gas dispersion performance of flotation equipment, wherein the device is simple to operate and high in practicability, does not influence the flotation process and efficiency, can realize direct observation of the bubble form and the dispersion state in the flotation process, and can provide a basis for deep research on the gas dispersion state in the flotation process.
The device includes the host computer, the stiff end, the arm, the sampler barrel, the light source, high-speed dynamic camera, a power supply, microprocessor, wireless transmitter, the memory, wireless basic station, power cord one, power cord two, communication line one and communication line two, wherein, arm upper portion sets up the stiff end, arm sub-unit connection sampler barrel, the light source, high-speed dynamic camera, a power supply, microprocessor, wireless transmitter and memory are fixed on the sampler barrel, the light source passes through power cord one and connects microprocessor, even there are power cord two and communication line two between dynamic high-speed camera and microprocessor, microprocessor connects wireless transmitter and memory, the memory passes through communication line one and connects the host computer, wireless basic station connects the host computer.
The longitudinal section of the sampling tube is of a hollow structure of an inverted U-shaped structure, the light source is fixed on two side walls of an inverted U-shaped groove, the high-speed dynamic camera is fixed on the top surface of the inverted U-shaped groove, and the power supply, the microprocessor, the wireless transmitter and the memory are integrated and then are hermetically installed inside the sampling tube.
The mechanical arm is hollow, sealed and waterproof, the preparation materials comprise polyester, polycarbonate, polyvinyl chloride and stainless steel, a communication wire and a power wire are arranged in the hollow cylinder of the mechanical arm, and the mechanical arm can stretch out and draw back in the transverse direction and the longitudinal direction.
The light source and the high-speed dynamic camera are subjected to waterproof sealing treatment, and the outer surface of the light source and the high-speed dynamic camera lens are plated with an anti-abrasion and waterproof film.
The high-speed dynamic camera is internally provided with a CCD image sensor, a power management system, a digital signal processor and an infrared night vision lighting device.
The microprocessor is connected with the light source and the high-speed camera, controls the on-off, the light color and the brightness of the light source, controls the on-off of the high-speed dynamic camera at the same time, and preprocesses data output by the high-speed dynamic camera, wherein the light source is an LED light source and is annularly arranged on the inner wall of the sampling cylinder, and the number and the position of the turned-on lamps and the brightness and the light color of the LED lamps are all adjusted by the upper computer.
The application method of the detection device comprises the following steps:
s1: fixing a detection device at a proper position of the outer wall of the flotation equipment to be detected through a fixed end, and adjusting a mechanical arm to fix a sampling cylinder at the position to be detected;
s2: after the ore pulp enters the sampling cylinder, the upper computer is connected with a power supply, and the quantity and the illumination intensity of the light source are adjusted according to the concentration and the internal brightness of the measured ore pulp;
s3: the high-speed dynamic camera shoots images and transmits the images to the microprocessor through the communication line II, and the microprocessor preprocesses and compresses data;
s4: the microprocessor transmits the preprocessed data to the wireless transmitter and the memory, the wireless base station receives the data transmitted by the wireless transmitter and transmits the data to the upper computer for image analysis, real-time monitoring of the dispersion state of the flotation gas is achieved, and the memory stores the preprocessed data so as to be taken out after detection is finished and guides the data to the upper computer;
s5: the upper computer processes the received data through analysis software to obtain an image of a gas dispersion state in flotation, directly observes flotation bubble distribution, and calculates the size, gas content and movement speed of bubbles;
s6: and detecting the gas dispersion states of different positions in the flotation equipment to obtain the integral gas dispersion state of the flotation equipment.
And S6, detecting for multiple times by placing the detection devices at different positions or installing a plurality of detection devices at different positions at the same time, and collecting and sorting gas state data at different positions to obtain the whole gas dispersion state and rule in the flotation equipment.
The technical scheme of the invention has the following beneficial effects:
in the scheme, the photographic device can directly shoot gas dispersion images in the ore pulp of the flotation equipment, and data such as bubble size, ore pulp gas content, bubble movement speed and the like can be obtained through processing and calculation of computer software. The method has the advantages that the gas dispersion state data of different positions of the flotation equipment are collected and sorted through simultaneous detection of multiple devices or multiple detection of a single device, and the general rule of gas distribution and dispersion state in the flotation equipment can be obtained. The device simple structure, convenient operation can be used for multiple flotation equipment, and the suitability is strong, and application range is wide, can be applied to a plurality of research areas. The device realizes the direct detection of the dispersion state of the ore pulp gas in the flotation equipment, solves the problem of direct observation of the gas in the flotation ore pulp, eliminates the error caused by over-idealization of a software simulation method and a theoretical derivation method, has more real and reliable data, and has important significance for researching the relation between the dispersion state of the flotation gas and the flotation efficiency, thereby providing theoretical basis for the development of the flotation process, the promotion of the flotation index and the research and development of the flotation equipment.
Drawings
FIG. 1 is a schematic structural diagram of a gas-liquid-solid three-phase gas dispersion performance detection device of a flotation device of the invention;
FIG. 2 is an application schematic diagram of the gas-liquid-solid three-phase gas dispersion performance detection device of the flotation equipment.
Wherein: 1-an upper computer, 2-a fixed end, 3-a mechanical arm, 4-a sampling cylinder, 5-a light source, 6-a high-speed dynamic camera, 7-a power supply, 8-a microprocessor, 9-a wireless transmitter, 10-a memory, 11-a wireless base station, 12-a power line I, 13-a power line II, 14-a communication line I and 15-a communication line II.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a device and a method for detecting gas-liquid-solid three-phase gas dispersion performance of flotation equipment.
As shown in figure 1, the device comprises an upper computer 1, a fixed end 2, a mechanical arm 3, a sampling cylinder 4, a light source 5, a high-speed dynamic camera 6, a power supply 7, a microprocessor 8, a wireless transmitter 9, a memory 10, a wireless base station 11, a first power line 12, a second power line 13, a first communication line 14 and a second communication line 15, the upper portion of the mechanical arm 3 is provided with a fixed end 2, the lower portion of the mechanical arm 3 is connected with a sampling cylinder 4, a light source 5, a high-speed dynamic camera 6, a power source 7, a microprocessor 8, a wireless transmitter 9 and a storage device 10 are fixed on the sampling cylinder 4, the light source 5 is connected with the microprocessor 8 through a first power line 12, a second power line 13 and a second communication line 15 are connected between the dynamic high-speed camera 6 and the microprocessor 8, the microprocessor 8 is connected with the wireless transmitter 9 and the storage device 10, the storage device 10 is connected with an upper computer 1 through a first communication line 14, and a wireless base station 11 is connected with the upper computer 1.
As shown in the figure, the longitudinal section of the sampling tube 4 is of a hollow structure with an inverted U-shaped structure, the light source 5 is fixed on two side walls of an inverted U-shaped groove, the high-speed dynamic camera 6 is fixed on the top surface of the inverted U-shaped groove, and the power supply 7, the microprocessor 8, the wireless transmitter 9 and the memory 10 are integrated and then are hermetically installed inside the sampling tube 4.
The mechanical arm 3 is hollow, sealed and waterproof, the preparation materials comprise polyester, polycarbonate, polyvinyl chloride and stainless steel, a communication wire and a power wire are arranged in the hollow cylinder of the mechanical arm 3, and the mechanical arm 3 can stretch out and draw back in the transverse direction and the longitudinal direction.
In the actual design, the light source 5 and the high-speed dynamic camera 6 are subjected to waterproof sealing treatment, and the outer surface of the light source 5 and the lens of the high-speed dynamic camera 6 are plated with anti-abrasion and waterproof films.
The high-speed dynamic camera 6 is internally provided with a CCD image sensor, a power supply management system, a digital signal processor and an infrared night vision lighting device.
As shown in fig. 2, the application method of the detection device includes the following steps:
s1: fixing a detection device at a proper position of the outer wall of the flotation equipment to be detected through a fixed end 1, and adjusting a mechanical arm 3 to fix a sampling cylinder 4 at the position to be detected;
s2: after the ore pulp enters the sampling cylinder 4, the power supply is switched on through the upper computer 1, and the quantity of light sources and the illumination intensity are adjusted according to the concentration and the internal brightness of the measured ore pulp;
s3: the high-speed dynamic camera 6 shoots images, the images are transmitted to the microprocessor 8 through the second communication line 15, and the microprocessor 8 preprocesses and compresses data;
s4: the microprocessor 8 transmits the preprocessed data to the wireless transmitter 9 and the memory 10, the wireless base station 11 receives the data transmitted by the wireless transmitter 10 and transmits the data to the upper computer 1 for image analysis, real-time monitoring of the dispersion state of the flotation gas is achieved, and the memory 10 stores the preprocessed data so as to be taken out after detection is finished and guide the data into the upper computer 1;
s5: the upper computer 1 processes the received data through analysis software to obtain an image of a gas dispersion state in flotation, directly observes flotation bubble distribution, and calculates the size, gas content and movement speed of bubbles;
s6: and detecting the gas dispersion states of different positions in the flotation equipment to obtain the integral gas dispersion state of the flotation equipment.
The following description is given with reference to specific examples.
Example 1
Taking the flotation process of a single flotation machine as an example, selecting an XF flotation machine, fixing a plurality of devices at different positions of the outer wall of the flotation machine through fixed ends, adjusting a mechanical arm to enable sampling cylinders to be distributed at different positions of the flotation machine, connecting a power supply through an upper computer of the device after ore pulp enters the sampling cylinders, adjusting the quantity and the illumination intensity of light sources according to the concentration and the internal brightness of the measured ore pulp, controlling the quantity and the brightness of LED light sources and the on-off of a high-speed camera by the microprocessor according to the instruction of the upper computer, shooting images by the high-speed dynamic camera, transmitting the images to the microprocessor through a communication line II, preprocessing and compressing the data, transmitting the preprocessed data to a wireless transmitter and a memory by the microprocessor, receiving signals output by the wireless transmitter and transmitting the signals to the upper computer by a wireless base station, processing the images output by each device by computer software, and calculating the gas content, the movement speed and the like of each position to obtain the gas-liquid-solid three-phase gas distribution and dispersion rule in the flotation machine.
Example 2
Taking the flotation process of a single flotation machine as an example, selecting an XF flotation machine, fixing the device on the outer wall of the flotation machine through a fixed end, adjusting a mechanical arm to fix a sampling cylinder at a proper position in the flotation machine, connecting a power supply through an upper computer of the device after ore pulp enters the sampling cylinder, adjusting the quantity and the illumination intensity of a light source according to the concentration and the internal brightness of the measured ore pulp, controlling the quantity and the brightness of an LED light source and the switch of a high-speed camera by a microprocessor according to the instruction of the upper computer, shooting an image by the high-speed dynamic camera, transmitting the image to the microprocessor through a communication line II, preprocessing and compressing data, transmitting the preprocessed data to a memory by the microprocessor, adjusting the mechanical arm after the shooting is completed, moving the sampling cylinder to other positions, repeating the steps, taking out the device after all the positions are detected, and guiding the data in a memory card into the upper computer, the images output by each device are processed by computer software, and the gas content, the movement speed and the like are calculated, so that the gas-liquid-solid three-phase gas distribution and dispersion rule in the flotation machine can be obtained.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides a flotation device gas-liquid-solid three-phase gas dispersion performance detection device which characterized in that: comprises an upper computer (1), a fixed end (2), a mechanical arm (3), a sampling cylinder (4), a light source (5), a high-speed dynamic camera (6), a power supply (7), a microprocessor (8), a wireless transmitter (9), a memory (10), a wireless base station (11), a power line I (12), a power line II (13), a communication line I (14) and a communication line II (15), wherein the fixed end (2) is arranged at the upper part of the mechanical arm (3), the sampling cylinder (4) is connected at the lower part of the mechanical arm (3), the light source (5), the high-speed dynamic camera (6), the power supply (7), the microprocessor (8), the wireless transmitter (9) and the memory (10) are fixed on the sampling cylinder (4), the light source (5) is connected with the microprocessor (8) through the power line I (12), the power line II (13) and the communication line II (15) are connected between the dynamic high-speed camera (6) and the microprocessor (8), the microprocessor (8) is connected with the wireless transmitter (9) and the memory (10), the memory (10) is connected with the upper computer (1) through a communication line I (14), and the wireless base station (11) is connected with the upper computer (1).
2. The flotation equipment gas-liquid-solid three-phase gas dispersion performance detection device of claim 1, characterized in that: the longitudinal section of the sampling tube (4) is of a hollow structure with an inverted U-shaped structure, the light sources (5) are fixed on two side walls of an inverted U-shaped groove, the high-speed dynamic camera (6) is fixed on the top surface of the inverted U-shaped groove, and the power supply (7), the microprocessor (8), the wireless transmitter (9) and the memory (10) are integrated and then are hermetically installed inside the sampling tube (4).
3. The flotation equipment gas-liquid-solid three-phase gas dispersion performance detection device of claim 1, characterized in that: the mechanical arm (3) is hollow, sealed and waterproof, the preparation materials comprise polyester, polycarbonate, polyvinyl chloride and stainless steel, a communication line and a power line are arranged in the hollow cylinder of the mechanical arm (3), and the mechanical arm (3) can stretch out and draw back in the transverse direction and the longitudinal direction.
4. The flotation equipment gas-liquid-solid three-phase gas dispersion performance detection device of claim 2, characterized in that: and the light source (5) and the high-speed dynamic camera (6) are subjected to waterproof sealing treatment, and the outer surface of the light source (5) and the lens of the high-speed dynamic camera (6) are plated with anti-abrasion and waterproof films.
5. The flotation equipment gas-liquid-solid three-phase gas dispersion performance detection device of claim 1, characterized in that: the high-speed dynamic camera (6) is internally provided with a CCD image sensor, a power supply management system, a digital signal processor and an infrared night vision lighting device.
6. The flotation equipment gas-liquid-solid three-phase gas dispersion performance detection device of claim 1, characterized in that: the microprocessor (8) is connected with the light source (5) and the high-speed camera (6), controls the on-off, light color and brightness of the light source (5), controls the on-off of the high-speed dynamic camera (6) simultaneously, preprocesses data output by the high-speed dynamic camera (6), the light source (5) is an LED light source and is annularly arranged on the inner wall of the sampling cylinder (4), and the number and the position of the turn-on lights and the brightness and light color of the LED light are all adjusted through the upper computer (1).
7. The application method of the flotation equipment gas-liquid-solid three-phase gas dispersion performance detection device according to claim 1 is characterized in that: the method comprises the following steps:
s1: fixing the detection device at a proper position of the outer wall of the flotation equipment to be detected through the fixed end (1), and adjusting the mechanical arm (3) to fix the sampling cylinder (4) at the position to be detected;
s2: after the ore pulp enters the sampling cylinder (4), the power supply is switched on through the upper computer (1), and the quantity and the illumination intensity of the light source are adjusted according to the concentration and the internal brightness of the measured ore pulp;
s3: the high-speed dynamic camera (6) shoots an image, the image is transmitted to the microprocessor (8) through the communication line II (15), and the microprocessor (8) preprocesses and compresses data;
s4: the microprocessor (8) transmits the preprocessed data to the wireless transmitter (9) and the memory (10), the wireless base station (11) receives the data transmitted by the wireless transmitter (10) and transmits the data to the upper computer (1) for image analysis, real-time monitoring of the dispersion state of the flotation gas is achieved, and the memory (10) stores the preprocessed data so as to be taken out after detection is finished and guides the data into the upper computer (1);
s5: the upper computer (1) processes the received data through analysis software to obtain an image of a gas dispersion state in flotation, directly observes the distribution of flotation bubbles, and calculates the size, gas content and movement speed of the bubbles;
s6: and detecting the gas dispersion states of different positions in the flotation equipment to obtain the integral gas dispersion state of the flotation equipment.
8. The application method of the flotation equipment gas-liquid-solid three-phase gas dispersion performance detection device according to claim 7 is characterized in that: and in the S6, the detection devices are arranged at different positions for multiple times of detection or a plurality of detection devices are simultaneously arranged at different positions for detection, and the gas state data at different positions are collected and sorted to obtain the whole gas dispersion state and rule in the flotation equipment.
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