CN113804679B - 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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- CN113804679B CN113804679B CN202110984152.XA CN202110984152A CN113804679B CN 113804679 B CN113804679 B CN 113804679B CN 202110984152 A CN202110984152 A CN 202110984152A CN 113804679 B CN113804679 B CN 113804679B
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- 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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- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
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- 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
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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 tube, 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 guiding the amplification and research and development of flotation equipment, the flotation process and the mechanism research, has strong practicability and easy realization, and provides a technical means for the research of 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 quality of 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 the solid particles, plays an important role in the hydrodynamic environment of flotation, and influences the flotation rate and flotation selectivity; the gas content refers to the volume of the gas phase in the pulp mixture, and is directly related to flotation dynamics and the bearing capacity of equipment; the motion state of the bubbles is closely related to the flotation mixing state and fluid dynamics. The research on the dispersion state of bubbles has important significance for researching a flotation process, adjusting flotation parameters and improving flotation indexes.
The existing testing equipment and method for 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 a gas-liquid two-phase mixture, and have severe environmental requirements, and a Particle Image Velocimetry (PIV) technology and a Laser Doppler Velocimetry (LDV) technology can be applied to a gas-liquid-solid three-phase mixture, but the system is required to be transparent, and the gas content cannot be effectively measured when the gas content is very low, so that the method is difficult to be applied to detection of a gas dispersion state in a flotation process. The existing hydrodynamic simulation software has unavoidable errors between simulation results and real states because of a large number of simplified research objects and more ideal hydrodynamic mathematical models, and the truest and visual 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 air bubbles at each position of the ore pulp in the flotation equipment, obtains the data such as the air bubble size, the air content and the air bubble movement speed through software processing, and provides an important research technical means for guiding the amplification and research of the flotation equipment, the flotation process and the mechanism research.
Disclosure of Invention
The invention aims to solve the technical problem of providing the device and the method for detecting the gas-liquid-solid three-phase gas dispersion performance of the flotation equipment, the device is simple to operate and high in practicability, the flotation process and the efficiency are not influenced, the direct observation of the bubble shape and the dispersion state in the flotation process can be realized, and the device and the method can provide a basis for the deep study of the gas dispersion state in the flotation process.
The device comprises an upper computer, a fixed end, a mechanical arm, a sampling tube, a light source, a high-speed dynamic camera, a power supply, a microprocessor, a wireless transmitter, a memory, a wireless base station, a first power line, a second power line, a first communication line and a second communication line, wherein the fixed end is arranged on the upper portion of the mechanical arm, the sampling tube is connected to the lower portion of the mechanical arm, the light source, the high-speed dynamic camera, the power supply, the microprocessor, the wireless transmitter and the memory are fixed on the sampling tube, the light source is connected with the microprocessor through a power line, the power line second and the communication line second are connected between the dynamic high-speed camera and the microprocessor, the microprocessor is connected with the wireless transmitter and the memory, the memory is connected with the upper computer through the communication line, and the wireless base station is connected with the upper computer.
The longitudinal section of the sampling tube is of a hollow structure with an inverted U-shaped structure, the light source is fixed on two side walls of the 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 installed inside the sampling tube in a sealing mode.
The inside of the mechanical arm is hollow, the mechanical arm is sealed and waterproof, the preparation material comprises polyester, polycarbonate, polyvinyl chloride and stainless steel, a communication wire and a power wire are arranged in a hollow cylinder of the mechanical arm, and the mechanical arm can stretch 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 lens of the high-speed dynamic camera are plated with wear-resistant and waterproof films.
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 illumination 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, and preprocesses data output by the high-speed dynamic camera, wherein the light source is an LED light source, the light sources are annularly arranged on the inner wall of the sampling tube, and the number and the positions of the turned-on lights, the brightness and the light color of the LED lights are all regulated by the upper computer.
The application method of the detection device 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 a fixed end, and adjusting the mechanical arm to fix the sampling tube at the position to be detected;
s2: after the ore pulp enters the sampling tube, a power supply is connected through an upper computer, and the number and illumination intensity of the light sources are adjusted according to the concentration and the internal brightness of the measured ore pulp;
s3: the high-speed dynamic camera shoots an image, the image is transmitted to the microprocessor through the second communication line, and the microprocessor pre-processes 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, so that the real-time monitoring of the dispersion state of the flotation gas is realized, and the memory stores the preprocessed data so as to take out the preprocessed data after the detection is finished, and the data is imported to the upper computer;
s5: the upper computer processes the received data through analysis software to obtain a gas dispersion state image in flotation, directly observes flotation bubble distribution, and calculates the size, gas content and movement speed of bubbles;
s6: detecting gas dispersion states at different positions in the flotation equipment to obtain the integral gas dispersion state of the flotation equipment.
And S6, detecting the detection device at different positions for multiple times or simultaneously installing a plurality of detection devices at different positions for detection, and collecting and arranging 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 photographing device can directly photograph the gas dispersion image in the ore pulp of the flotation equipment, and the data of the size of bubbles, the gas content of the ore pulp, the movement speed of the bubbles and the like can be obtained through the processing and the calculation of computer software. Through simultaneous detection of multiple devices or multiple detection of a single device, gas dispersion state data of different positions of the flotation device are collected and tidied, and a general rule of gas distribution and dispersion state in the flotation device can be obtained. The device simple structure, convenient operation can be used to multiple flotation equipment, and the suitability is strong, and application range is wide, can be applied to a plurality of research fields. The device realizes the direct detection of the gas dispersion state of the ore pulp in the flotation equipment, solves the problem of direct gas observation in the flotation ore pulp, eliminates errors generated by a software simulation method and a theoretical derivation method due to over-idealization, has more real and reliable data, and has important significance for researching the relationship between the gas dispersion state of the flotation and the flotation efficiency, thereby providing theoretical basis for the development of flotation technology, the promotion of flotation indexes and the research and development of flotation equipment.
Drawings
FIG. 1 is a schematic 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 a gas-liquid-solid three-phase gas dispersion performance detection device of the flotation equipment of the invention.
Wherein: the system comprises a 1-upper computer, a 2-fixed end, a 3-mechanical arm, a 4-sampling tube, a 5-light source, a 6-high-speed dynamic camera, a 7-power supply, an 8-microprocessor, a 9-wireless transmitter, a 10-memory, an 11-wireless base station, a 12-power line I, a 13-power line II, a 14-communication line I and a 15-communication line II.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be 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 fig. 1, the device comprises an upper computer 1, a fixed end 2, a mechanical arm 3, a sampling tube 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 supply line 12, a second power supply line 13, a first communication line 14 and a second communication line 15, wherein the fixed end 2 is arranged at the upper part of the mechanical arm 3, the lower part of the mechanical arm 3 is connected with the sampling tube 4, 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 tube 4, the light source 5 is connected with the microprocessor 8 through the first power supply line 12, a second power supply line 13 and the 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 memory 10, the memory 10 is connected with the upper computer 1 through the first communication line 14, and the wireless base station 11 is connected with the upper computer 1.
Wherein, as shown in the figure, the longitudinal section of the sampling tube 4 is a hollow structure with an inverted U-shaped structure, the light source 5 is fixed on two side walls of the 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 arranged inside the sampling tube 4.
The inside of the mechanical arm 3 is hollow, the mechanical arm is sealed and waterproof, the preparation materials comprise polyester, polycarbonate, polyvinyl chloride and stainless steel, a communication wire and a power wire are arranged in a hollow cylinder of the mechanical arm 3, and the mechanical arm 3 can stretch in the transverse direction and the longitudinal direction.
In practical 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-wear and waterproof films.
The high-speed dynamic camera 6 is internally provided with a CCD image sensor, a power management system, a digital signal processor and an infrared night vision illumination device.
As shown in fig. 2, the application method of the detection device includes the following steps:
s1: fixing the detection device at a proper position of the outer wall of the flotation equipment to be detected through a fixed end 1, and adjusting the mechanical arm 3 to fix the sampling tube 4 at the position to be detected;
s2: after the ore pulp enters the sampling tube 4, a power supply is connected through the upper computer 1, and the quantity and illumination intensity of the light sources 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 second communication line 15, and the microprocessor 8 pre-processes 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, so that the real-time monitoring of the dispersion state of the flotation gas is realized, and the memory 10 stores the preprocessed data so as to be taken out after the detection is finished, and the data is imported into the upper computer 1;
s5: the upper computer 1 processes the received data through analysis software to obtain a gas dispersion state image in flotation, directly observes flotation bubble distribution, and calculates the bubble size, gas content and movement speed;
s6: detecting gas dispersion states at different positions in the flotation equipment to obtain the integral gas dispersion state of the flotation equipment.
The following describes specific embodiments.
Example 1
Taking a single flotation machine as an example, an XF flotation machine is selected, a plurality of devices are fixed at different positions on the outer wall of the flotation machine through fixed ends, mechanical arms are adjusted, sampling barrels are distributed at different positions of the flotation machine, ore pulp enters the sampling barrels, a power supply is connected through an upper computer of the device, the number and illumination intensity of light sources are adjusted according to the concentration and the internal brightness of the measured ore pulp, a microprocessor controls the number and the brightness of LED light sources and the switch of a high-speed camera according to the instruction of the upper computer, the high-speed dynamic camera shoots images, the images are transmitted to the microprocessor through a second communication line, data are preprocessed and compressed, the microprocessor transmits the preprocessed data to a wireless transmitter and a memory, the wireless base station receives signals output by the wireless transmitter and transmits the signals to the upper computer, the images output by the devices are processed by computer software, the gas content rate, the movement speed and the like of each position are calculated, and the gas distribution and dispersion rule of gas-liquid-solid three-phase in the flotation machine can be obtained.
Example 2
Taking a single flotation machine flotation process 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, fixing a sampling tube at a proper position inside the flotation machine, after ore pulp enters the sampling tube, switching on a power supply through an upper computer of the device, adjusting the number and illumination intensity of light sources according to the concentration and the internal brightness of the measured ore pulp, controlling the number and brightness of LED light sources and a switch of a high-speed camera by a microprocessor according to instructions 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 shooting, moving the sampling tube to other positions, repeating the steps, taking out the device after all positions are detected, guiding the data in the memory card into the upper computer, processing the images output by all the devices by computer software, calculating the gas content, the movement speed and the like, and obtaining the gas-liquid-solid three-phase gas distribution and dispersion law in the flotation machine.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (6)
1. A flotation equipment gas-liquid-solid three-phase gas dispersion performance detection device is characterized in that: the wireless high-speed dynamic camera 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), wherein the fixed end (2) is arranged on the upper part of the mechanical arm (3), the lower part of the mechanical arm (3) is connected with the sampling cylinder (4), the light source (5), the high-speed dynamic camera (6), the power supply (7), the microprocessor (8), the wireless transmitter (9) and a memory (10) are fixed on the sampling cylinder (4), the light source (5) is connected with the microprocessor (8) through the first power line (12), the power supply line (13) and the second communication line (15) are connected between the high-speed dynamic 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 the first communication line (14), and the wireless base station (1) is connected with the upper computer (1).
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 the 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 arranged in the sampling tube (4);
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 light source (5) is an LED light source and is annularly arranged on the inner wall of the sampling tube (4).
2. The flotation device gas-liquid-solid three-phase gas dispersion detection apparatus according to claim 1, wherein: the inside cavity of arm (3), sealed waterproof, preparation material includes polyester, polycarbonate, polyvinyl chloride, stainless steel, and communication line and power cord are built-in to the hollow section of thick bamboo of arm (3), and arm (3) can transversely and vertically stretch out and draw back.
3. The flotation device gas-liquid-solid three-phase gas dispersion detection apparatus according to claim 1, wherein: the high-speed dynamic camera (6) is internally provided with a CCD image sensor, a power management system, a digital signal processor and an infrared night vision illumination device.
4. The flotation device gas-liquid-solid three-phase gas dispersion detection apparatus according to claim 1, wherein: the microprocessor (8) is connected with the light source (5) and the high-speed dynamic camera (6), controls the switch, the light color and the brightness of the light source (5), simultaneously controls the switch of the high-speed dynamic camera (6), preprocesses the data output by the high-speed dynamic camera (6), and adjusts the quantity and the position of the turned-on light, the brightness and the light color of the LED light source through the upper computer (1).
5. The method for applying the gas-liquid-solid three-phase gas dispersion performance detection device for flotation equipment according to claim 1, wherein the method comprises the following steps: 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 (2), and adjusting the mechanical arm (3) to fix the sampling tube (4) at the position to be detected;
s2: after the ore pulp enters the sampling tube (4), a power supply is connected through the upper computer (1), and the quantity and illumination intensity of the light sources 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 second communication line (15), and the microprocessor (8) pre-processes 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 (9) and transmits the data to the upper computer (1) for image analysis, so that the real-time monitoring of the dispersion state of the flotation gas is realized, and the memory (10) stores the preprocessed data so as to be taken out after the detection is finished, and the data is imported into the upper computer (1);
s5: the upper computer (1) processes the received data through analysis software to obtain a gas dispersion state image in flotation, directly observes flotation bubble distribution, and calculates the size, gas content and movement speed of bubbles;
s6: detecting gas dispersion states at different positions in the flotation equipment to obtain the integral gas dispersion state of the flotation equipment.
6. The method for applying the gas-liquid-solid three-phase gas dispersion performance detection device for flotation equipment according to claim 1, wherein the method comprises the following steps: in the step S6, the detection devices are arranged at different positions for multiple detection or a plurality of detection devices are simultaneously arranged at different positions for detection, and gas state data at different positions are collected and tidied to obtain the overall gas dispersion state and rule in the flotation equipment.
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