CN113804679B - Device and method for detecting gas-liquid-solid three-phase gas dispersion performance of flotation equipment - Google Patents

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

Flotation equipment gas-liquid-solid three-phase gas dispersion performance detection device and method

technical field

The invention relates to the technical field of mineral processing, in particular to a gas-liquid-solid three-phase gas dispersion performance detection device and method for flotation equipment.

Background technique

Flotation is one of the most widely used methods in mineral separation, in which gas dispersion directly affects the flotation effect and is closely related to flotation indicators. The dispersion parameters mainly include bubble size, gas holdup and movement state. The size of the bubbles determines the surface area of the bubbles in contact with the solid particles, which plays an important role in the hydrodynamic environment of flotation, affecting the flotation rate and flotation selectivity; the gas holdup refers to the volume of the gas phase in the slurry mixture, directly It is related to the flotation dynamics and the carrying capacity of the equipment; the movement state of the bubbles is closely related to the flotation mixing state and fluid dynamics. Studying the dispersion state of bubbles is of great significance for studying the flotation process, adjusting the flotation parameters and improving the flotation index.

At present, there are mainly heat transfer probes, capillary probes, particle image velocimetry (PIV) technology and laser Doppler velocimetry (LDV) technology for testing the gas dispersion state in multiphase flow. Among them, heat transfer probes and capillary probes are only suitable for gas-liquid two-phase mixtures, and have strict environmental requirements. Particle image velocimetry (PIV) technology and laser Doppler velocimetry (LDV) technology can be applied to gas-liquid- Solid three-phase mixture, but requires the system to be transparent, and cannot be effectively measured when the gas holdup is very low, so it is difficult to apply to the detection of gas dispersion state in the flotation process. Existing fluid dynamics simulation software greatly simplifies the research objects and uses many ideal fluid dynamics mathematical models. There are irreversible errors between the simulation results and the real state, and the most realistic and intuitive data cannot be obtained. The detection of the gas dispersion state in the flotation process is relatively blank, which seriously restricts the development of the flotation process. The invention can realize the real-time visual observation of the bubble dispersion state at each position of the pulp in the flotation equipment, and obtain data such as the bubble size, gas holdup rate and bubble movement speed through software processing, which is useful for guiding the enlargement of the flotation equipment, research and development, and flotation Process and mechanism research provides important research technical means.

Contents of the invention

The technical problem to be solved by the present invention is to provide a gas-liquid-solid three-phase gas dispersion performance detection device and method for flotation equipment. The direct observation of the bubble shape and dispersion state in the flotation process can provide a basis for the in-depth study of the gas dispersion state in the flotation process.

The device includes host computer, fixed end, mechanical arm, sampling cylinder, light source, high-speed dynamic camera, power supply, microprocessor, wireless transmitter, memory, wireless base station, power line 1, power line 2, communication line 1 and communication line 2. Among them, the upper part of the mechanical arm is provided with a fixed end, the lower part of the mechanical arm is connected to the sampling cylinder, the light source, high-speed dynamic camera, power supply, microprocessor, wireless transmitter and memory are fixed on the sampling cylinder, and the light source is connected to the microprocessor through the power cord A power line 2 and a communication line 2 are connected between the dynamic high-speed camera and the microprocessor, the microprocessor is connected to the wireless transmitter and the memory, the memory is connected to the upper computer through the communication line 1, and the wireless base station is connected to the upper computer.

Among them, the longitudinal section of the sampling cylinder is a hollow structure with an inverted U-shaped structure, the light source is fixed on the 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, the power supply, microprocessor, wireless transmitter After the sensor and storage are integrated, they are sealed and installed inside the sampling cylinder.

The interior of the robotic arm is hollow, sealed and waterproof. The preparation materials include polyester, polycarbonate, polyvinyl chloride, and stainless steel. The hollow barrel of the robotic arm has built-in communication lines and power cables. The robotic arm can be stretched horizontally and vertically.

The light source and the high-speed dynamic camera are waterproof and sealed, and the outer surface of the light source and the lens of the high-speed dynamic camera are coated with an anti-wear and waterproof film.

The high-speed dynamic camera has built-in CCD image sensor, power management system, digital signal processor and infrared night vision lighting device.

The microprocessor connects the light source and high-speed camera to control the switch, light color and brightness of the light source, and at the same time controls the switch of the high-speed dynamic camera to preprocess the data output by the high-speed dynamic camera. The light source is LED light source, which is arranged in a ring on the inner wall of the sampling cylinder. The number and position of the lights, the brightness and light color of the LED lights are all adjusted by the host computer.

The application method of the detection device comprises the following steps:

S1: Fix the detection device at a suitable position on the outer wall of the flotation equipment to be tested through the fixed end, and adjust the mechanical arm to fix the sampling cylinder at the position to be tested;

S2: After the pulp enters the sampling cylinder, turn on the power through the host computer, and adjust the number of light sources and light intensity according to the concentration of the measured pulp and the internal brightness;

S3: The high-speed dynamic camera captures images, and transmits the images to the microprocessor through the communication line 2, and the microprocessor preprocesses and compresses the data;

S4: The microprocessor transmits the preprocessed data to the wireless transmitter and memory, and the wireless base station receives the data from the wireless transmitter and transmits it to the host computer for image analysis, realizing real-time monitoring of the dispersion state of the flotation gas, and memory storage The preprocessed data can be taken out after the detection, and the data can be imported into the upper computer;

S5: The upper computer processes the received data through the analysis software, obtains the image of the gas dispersion state in the flotation, directly observes the distribution of the flotation bubbles, and calculates the bubble size, gas holdup and movement speed;

S6: Detect the gas dispersion state at different positions inside the flotation device, and obtain the overall gas dispersion state of the flotation device.

In S6, the detection device is placed in different positions for multiple detections or multiple detection devices are installed in different positions for detection at the same time, and the gas state data at different positions are collected and sorted to obtain the overall gas dispersion state and law in the flotation equipment.

The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

In the above solution, the camera device can directly capture the gas dispersion image inside the pulp of the flotation equipment, and through computer software processing and calculation, data such as bubble size, pulp gas holdup, and bubble movement speed can be obtained. Through the simultaneous detection of multiple devices or multiple detections of a single device, the gas dispersion state data at different positions of the flotation device can be collected and sorted out, and the general law of gas distribution and dispersion state in the flotation device can be obtained. The device has simple structure and convenient operation, can be used in various flotation devices, has strong applicability, wide application range, and can be applied to multiple research fields. This device realizes the direct detection of the gas dispersion state of the pulp in the flotation equipment, solves the problem of direct observation of the gas in the flotation pulp, eliminates the error caused by the software simulation method and the theoretical derivation method due to too idealization, and the data is more real Reliable, it is of great significance to study the relationship between the dispersion state of flotation gas and flotation efficiency, so as to provide a theoretical basis for the development of flotation technology, the improvement of flotation index and the research and development of flotation equipment.

Description of drawings

Fig. 1 is the structural schematic diagram of the gas-liquid-solid three-phase gas dispersion performance detection device of the flotation equipment of the present invention;

Fig. 2 is a schematic diagram of the application of the gas-liquid-solid three-phase gas dispersion performance detection device of the flotation equipment of the present invention.

Among them: 1-host computer, 2-fixed end, 3-mechanical arm, 4-sampling cylinder, 5-light source, 6-high-speed dynamic camera, 7-power supply, 8-microprocessor, 9-wireless transmitter, 10- Memory, 11-wireless base station, 12-power line one, 13-power line two, 14-communication line one, 15-communication line two.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

The invention provides a gas-liquid-solid three-phase gas dispersion performance detection device and method for flotation equipment.

As shown in Figure 1, the device includes a host 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, power line one 12, power line two 13, communication line one 14 and communication line two 15, wherein, the upper part of the mechanical arm 3 is provided with a fixed end 2, the lower part of the mechanical arm 3 is connected to the sampling cylinder 4, the light source 5, and the high-speed dynamic camera 6 , power supply 7, microprocessor 8, wireless transmitter 9 and memory 10 are fixed on the sampling cylinder 4, light source 5 is connected to microprocessor 8 by power cord-12, and power cord is connected between dynamic high-speed camera 6 and microprocessor 8 Two 13 and communication line two 15, the microprocessor 8 is connected to the wireless transmitter 9 and the memory 10, the memory 10 is connected to the upper computer 1 through the communication line one 14, and the wireless base station 11 is connected to the upper computer 1.

Wherein, as shown in the figure, the longitudinal section of the sampling cylinder 4 is a hollow structure with an inverted U-shaped structure, the light source 5 is fixed on the two side walls of the inverted U-shaped groove, and the high-speed dynamic camera 6 is fixed on the top surface of the inverted U-shaped groove. The power supply 7 , microprocessor 8 , wireless transmitter 9 and memory 10 are integrated and hermetically installed inside the sampling cylinder 4 .

The interior of the robotic arm 3 is hollow, sealed and waterproof. The preparation materials include polyester, polycarbonate, polyvinyl chloride, and stainless steel. The hollow barrel of the robotic arm 3 has built-in communication lines and power cables. The robotic arm 3 can be stretched horizontally and vertically.

In the actual design, the light source 5 and the high-speed dynamic camera 6 are waterproof and sealed, and the outer surface of the light source 5 and the lens of the high-speed dynamic camera 6 are coated with an anti-wear and waterproof film.

The high-speed dynamic camera 6 has a built-in CCD image sensor, power management system, digital signal processor and infrared night vision lighting device.

As shown in Figure 2, the application method of the detection device includes the following steps:

S1: Fix the detection device at a suitable position on the outer wall of the flotation equipment to be tested through the fixed end 1, adjust the mechanical arm 3, and fix the sampling cylinder 4 at the position to be tested;

S2: After the pulp enters the sampling cylinder 4, turn on the power through the host computer 1, and adjust the number of light sources and the light intensity according to the concentration of the measured pulp and the internal brightness;

S3: the high-speed dynamic camera 6 takes images, and transmits the images to the microprocessor 8 through the communication line 2 15, and the microprocessor 8 preprocesses and compresses the data;

S4: The microprocessor 8 transmits the preprocessed data to the wireless transmitter 9 and the memory 10, and the wireless base station 11 receives the data from the wireless transmitter 10 and transmits it to the host computer 1 for image analysis to realize the flotation gas dispersion state For real-time monitoring, the memory 10 stores the preprocessed data, so that it can be taken out after the detection is finished, and the data can be imported into the upper computer 1;

S5: The upper computer 1 processes the received data through the analysis software, obtains the image of the gas dispersion state in the flotation, directly observes the distribution of the flotation bubbles, and calculates the bubble size, gas holdup and movement speed;

S6: Detect the gas dispersion state at different positions inside the flotation device, and obtain the overall gas dispersion state of the flotation device.

The following will be described in conjunction with specific embodiments.

Example 1

Taking the flotation process of a single flotation machine as an example, choose an XF flotation machine, fix multiple devices described above at different positions on the outer wall of the flotation machine through the fixed end, and adjust the mechanical arm so that the sampling cylinders are distributed in different positions of the flotation machine. position, after the pulp enters the sampling cylinder, the upper computer of the device is powered on, and the number of light sources and light intensity are adjusted according to the concentration of the measured pulp and the internal brightness, and the microprocessor controls the number of LED light sources according to the instructions of the upper computer. And the brightness and the switch of the high-speed camera, the high-speed dynamic camera shoots the image, the image is transmitted to the microprocessor through the communication line 2, the data is preprocessed and compressed, and the microprocessor transmits the preprocessed data to the wireless transmitter and memory, The wireless base station receives the signal output by the wireless transmitter and transmits it to the host computer, uses computer software to process the images output by each device, calculates the gas holdup rate and movement speed at each position, and can obtain the gas-liquid-solid three-phase gas in the flotation machine Distribution and dispersion laws.

Example 2

Taking the flotation process of a single flotation machine as an example, choose an XF flotation machine, fix the device on the outer wall of the flotation machine through the fixed end, adjust the mechanical arm, so that the sampling cylinder is fixed at a suitable position inside the flotation machine, and the pulp enters After the sampling cylinder, the upper computer of the device is powered on, and the number and light intensity of the light sources are adjusted according to the concentration of the measured pulp and the internal brightness. The microprocessor controls the number and brightness of the LED light sources and the high-speed The switch of the camera, the high-speed dynamic camera takes images, and the images are transmitted to the microprocessor through the communication line 2, and the data is preprocessed and compressed, and the microprocessor transmits the preprocessed data to the memory. After taking pictures, adjust the mechanical arm, Move the sampling cylinder to other positions, repeat the above steps, and after detecting all the positions, take out the device, import the data in the memory card into the host computer, process the images output by each device with computer software, and calculate the gas holdup rate, movement speed, etc. , the gas-liquid-solid three-phase gas distribution and dispersion law in the flotation machine can be obtained.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection 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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