Carbon black particle cleaning and separation integrated device and method

Abstract

The application discloses a carbon black particle cleaning and separating integrated device and method, and relates to the technical field of carbon black particle cleaning and separating.The device is mainly composed of a multi-channel shunting component, a periodic electrostatic component and an ultrasonic separating space.The multi-channel shunting component realizes raw material conveying and preliminary dispersion, the periodic electrostatic component enables carbon black particles to be loaded with different charges, and the ultrasonic separating space utilizes ultrasonic waves to break the agglomeration and realizes accurate separation with the help of the gradient voltage of the arc-shaped electrostatic plate.The method comprises the following steps: raw material conveying, charge loading, particle separating pretreatment, different particle size particle separation, vibration discharge and collection, etc.The application effectively solves the problem of inaccurate separation caused by carbon black agglomeration in the traditional separation method, can accurately separate carbon black particles of different particle sizes, improves the product quality, and can adapt to the separation of carbon black of different particle size ranges by adjusting relevant parameters, thereby meeting diversified production requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon black particle sorting, and in particular to an integrated device and method for selecting and separating carbon black particles. Background Art

[0002] Carbon black, a crucial industrial raw material, is widely used in a wide range of fields, including rubber, inks, and coatings. The uniformity of its particle size plays a crucial role in the performance of downstream products. In the rubber industry, for example, uniform carbon black particles disperse more evenly within the rubber matrix, effectively enhancing properties such as tensile strength and abrasion resistance. In ink production, uniform carbon black particle size ensures color stability, fluidity, and print clarity.

[0003] However, the current sorting of carbon black particles faces many challenges. Currently, the sorting of carbon black particles mainly relies on traditional screening equipment, gravity separators or single electrostatic sorting devices. Traditional mechanical screening equipment screens carbon black particles based on the size of the mesh aperture. However, carbon black has the characteristics of high surface activity and is very easy to form soft agglomerates during production, storage and transportation. The particle size of these agglomerates far exceeds the actual particle size of carbon black particles, making it difficult for traditional mechanical screening to effectively disperse them. As a result, a large number of agglomerates in the screening results are mistakenly judged as large-sized particles. The actual separated carbon black particle size deviates greatly from the true particle size, seriously affecting product quality.

[0004] Gravity separators separate carbon black particles based on their settling velocity in a gravitational field. However, carbon black particles have similar densities, and soft agglomeration interferes with their settling behavior, making it difficult for the settling velocity to accurately reflect the particles' true size, significantly reducing sorting accuracy.

[0005] While single electrostatic separation devices can utilize the charge characteristics of carbon black particles for sorting, in practice, due to the soft agglomeration of carbon black, the complex charge distribution within and outside the agglomerates makes it difficult to accurately separate carbon black particles of different sizes. Furthermore, the relatively fixed electric field distribution of traditional static electrostatic separation methods cannot fully meet the needs of differentiated separation of carbon black particles of different sizes, further resulting in a significant discrepancy between particle size detection results and actual separation performance.

[0006] The above-mentioned problem of separation and selection of carbon black particles has seriously restricted the application of carbon black in high-end products, and innovative sorting technology is urgently needed to solve it. Summary of the Invention

[0007] The theoretical basis for realizing the selective separation of the device of the present invention is as follows:

[0008] Under the same preparation conditions and environment, the smaller the carbon black particle size, the more charge it may carry. The reasons are as follows:

[0009] 1. Large Specific Surface Area: Carbon black with smaller particle sizes has a larger specific surface area. This means that its surface has more active sites, capable of adsorbing or dissociating more charged particles, thus carrying a higher charge. For example, when oxygen-containing functional groups such as carboxyl groups are introduced to the carbon black surface through oxidation reactions, smaller carbon black particles, due to their larger specific surface area, will have more functional groups dissociating, thus carrying a higher negative charge.

[0010] 2. Large surface curvature: Small-particle carbon black has a larger surface curvature, which increases the unevenness of its surface charge distribution, resulting in a higher local charge density. To maintain charge balance, carbon black will adsorb or dissociate more ions to reduce surface energy, thereby increasing the amount of charge it carries.

[0011] Based on the above theory, the present invention provides an integrated device for selecting and separating carbon black particles, including a multi-channel diversion component, a periodic electrostatic component, and an ultrasonic sorting space that are installed in coordination with each other.

[0012] The multi-channel shunt component includes a feed bin, a charge loading pipeline connected to the feed bin, and a nitrogen injection pipe for injecting nitrogen gas into the charge loading pipeline. The charge loading pipeline is provided with 3 to 5 groups of parallel distributed charged channels.

[0013] The periodic electrostatic assembly includes an electrostatic tube running through each charged channel, a servo motor for driving the electrostatic tube to rotate, and an electrostatic pulse power supply electrically connected to the electrostatic tube through a brush.

[0014] The ultrasonic sorting chamber includes a sorting chamber, high-frequency ultrasonic transducers positioned on both sides of the chamber, and a curved electrostatic plate for electrostatically sorting carbon black particles. The chamber houses a sorting cavity, the upper portion of which communicates with the charged channel. The bottom of the cavity houses channels for large and small particles. A nitrogen refill pipe, facing the outlet of the large particle channel, is located at the top of the chamber. The high-frequency ultrasonic transducer is positioned directly above the large particle channel, and the curved electrostatic plate is positioned above the small particle channel. A vibrator is located on the back of the curved electrostatic plate.

[0015] As a preferred technical solution of the equipment of the present invention: the feeding bin includes an internal injection cavity, an injection pipe connected to the injection cavity, and a material guide channel located below the injection cavity, wherein the material guide channel is arranged at an angle and connected to the charged channel, and the nitrogen injection pipe is opposite to the material guide channel and is equipped with an air flow valve.

[0016] As a preferred technical solution of the device of the present invention: the electrostatic tube passes through the axis of the charged channel, and the charged channel has a non-circular cross-section, including any regular polygon, trapezoid or sawtooth shape.

[0017] As a preferred technical scheme of the device: the servo motor is fixedly installed at the bottom of the outside of the feeding bin, the servo motor output shaft is fixedly connected with the electrostatic tube, and the servo motor output shaft is provided with a sealing bearing at the position of the feeding bin.

[0018] As a preferred technical scheme of the device: the sorting bin is provided with a shunt baffle with a horizontal position lower than the high-frequency ultrasonic transducer, the large-particle channel is located at one side of the shunt baffle, and the small-particle channel is located at the other side of the shunt baffle.

[0019] As a preferred technical scheme of the device: the electrostatic pulse power supply is fixedly installed outside the sorting bin, the electrostatic tube penetrates through the upper region of the sorting cavity, and the electrostatic tube is provided with a sealing bearing at the connection position with the sorting bin.

[0020] As a preferred technical scheme of the device: the voltage intensity distribution of the arc-shaped electrostatic plate gradually increases from top to bottom, and the lower end of the arc-shaped electrostatic plate extends into the upper region of the small-particle channel.

[0021] The application provides a carbon black particle selection and separation method.

[0022] S1. The carbon black raw material is conveyed to the feeding cavity through the feeding pipe, and the carbon black raw material falls along the feeding cavity to the material guiding channel under the action of gravity. The nitrogen injection pipe is opened, and the carbon black raw material in the material guiding channel is blown into the electric charge loading pipeline by the pushing force of the nitrogen gas flow.

[0023] S2. The electrostatic pulse power supply supplies power to the electrostatic tube according to the set period T, and the servo motor drives the electrostatic tube to rotate. The carbon black particles entering the charging channel are gradually dispersed and charged under the joint action of the electrostatic field, the mechanical force generated by the rotation of the electrostatic tube and the nitrogen gas flow. With the continuous action of the above, the charged carbon black particles continuously move forward in the channel until they leave the charging channel and enter the sorting bin.

[0024] S3. After the charged carbon black particles enter the sorting bin, the high-frequency ultrasonic transducer is started. Under the action of the ultrasonic wave generated by the high-frequency ultrasonic transducer, the carbon black particles separate from each other and become independent individuals, laying a foundation for subsequent accurate sorting.

[0025] S4. In the sorting bin, different particle sizes of the carbon black particles have different amounts of charges, and different movement trajectories are shown in the sorting process.

[0026] S4.1. The large-particle carbon black particles have less charge and larger mass, and continuously move downward under the action of gravity and the vertical downward blowing air flow from the nitrogen supplement pipe, and finally are discharged from the large-particle channel to the sorting cavity.

[0027] S4.2. Small particle size carbon black particles have a large amount of charge, and their own mass is relatively small. Under the action of the heterogeneous electrostatic attraction generated by the gradient voltage field of the arc-shaped electrostatic plate, the small particle size carbon black particles accelerate towards the arc-shaped electrostatic plate;

[0028] S5. After the small particle size carbon black particles are adsorbed to the arc-shaped electrostatic plate, the vibrator is started, and the vibrator makes the arc-shaped electrostatic plate vibrate. Under the action of vibration, the small particle size carbon black particles attached to the surface of the arc-shaped electrostatic plate are separated from the electrostatic adsorption, and are discharged from the small particle channel to the sorting cavity, so that the collection of carbon black particles of different particle sizes is realized, and the whole sorting process is completed.

[0029] Compared with the prior art, the beneficial effects of the present application are:

[0030] 1. The present application can effectively solve the problem of inaccurate sorting caused by carbon black agglomeration in the traditional sorting method through the multi-channel design of the multi-channel shunt assembly, the differential charge loading of the periodic electrostatic assembly, and the destruction of agglomeration by the high-frequency ultrasonic transducer in the ultrasonic sorting space and the gradient voltage sorting of the arc-shaped electrostatic plate. The present application can realize accurate separation of carbon black particles of different particle sizes and improve the quality of carbon black products.

[0031] 2. In the present application, the nitrogen injection pipe of the sorting bin is matched with the shunt baffle to form a directional airflow. The large particle carbon black is directly discharged from the large particle channel under the action of gravity and airflow, and the small particles are accurately collected by electrostatic adsorption.

[0032] 3. The present application can adapt to the sorting of carbon black particles of different particle size ranges (10 nm-100 μm) by adjusting the parameters of the electrostatic pulse power supply, the frequency of the ultrasonic transducer and the voltage gradient of the arc-shaped electrostatic plate, and can meet the diversified production needs. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of the overall structure of the present application.

[0034] Figure 2 It is Figure 1 A local enlarged structural schematic view of the present application.

[0035] Figure 3 It is Figure 1 A local enlarged structural schematic view of the present application.

[0036] Figure 4 It is a top view structural schematic view of the arc-shaped electrostatic plate in the present application.

[0037] Among them: 1-feeding bin, 101-feeding pipe, 102-feeding cavity, 103-feeding channel; 2-charge loading pipe, 201-charged channel; 3-nitrogen injection pipe; 4-air flow valve; 5-servo motor; 6-electrostatic tube; 7-sealed bearing; 8-sorting bin, 801-sorting cavity, 802-diverter baffle, 803-large particle channel, 804-small particle channel; 9-electrostatic pulse power supply; 10-high-frequency ultrasonic transducer; 11-arc-shaped electrostatic plate; 12-vibrator; 13-large particle carbon black, 14-small particle carbon black; 15-nitrogen replenishing pipe. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] Example 1: The integrated equipment for selecting and separating carbon black particles of the present invention mainly consists of three parts: a multi-channel diversion component, a periodic electrostatic component, and an ultrasonic sorting space. These parts work together to achieve accurate sorting of carbon black particles. The specific configuration is as follows:

[0040] 1. Multi-channel shunt components: such as Figure 1 、 Figure 2 , including a feed bin 1, a charge loading pipeline 2, and a nitrogen injection pipe 3. Inside the feed bin 1 are an injection cavity 102, an injection pipe 101, and a guide channel 103. The injection pipe 101 is connected to the injection cavity 102, and the guide channel 103 is tilted below the injection cavity 102 and is connected to the charged channel 201 of the charge loading pipeline 2. Its function is to transport the carbon black raw material to the subsequent processing area. The injection pipe 101 is used to introduce the carbon black raw material. Under the action of gravity, the raw material slides from the injection cavity 102 to the guide channel 103. The nitrogen injection pipe 3 is opposite to the guide channel 103 and is equipped with an airflow valve 4. After the nitrogen injection pipe 3 is opened, the carbon black raw material in the guide channel 103 can be blown into the charge loading pipeline 2 by the driving force of the nitrogen airflow, so that the carbon black raw material is dispersed and preliminarily moved, in preparation for subsequent charge loading. The charge loading pipeline 2 is provided with 3-5 groups of parallel distributed charged channels 201. This multi-channel design can process multiple streams of carbon black particles simultaneously, thereby improving the sorting efficiency.

[0041] 2. Periodic electrostatic components: such as Figure 1 、 Figure 2 、 Figure 3The electrostatic tube 6 is composed of an electrostatic tube 6, a servo motor 5, and an electrostatic pulse power supply 9. The electrostatic tube 6 runs through the axis of each charging channel 201, and the charging channel 201 has a non-circular cross-section (such as a regular polygon, trapezoid, or sawtooth shape). This design increases the contact area between the electrostatic tube 6 and the carbon black particles and the complexity of the interaction, which helps to better charge the carbon black particles. The servo motor 5 is fixedly mounted on the bottom of the outer side of the feed hopper 1. Its output shaft is fixedly connected to the electrostatic tube 6. A sealed bearing 7 is installed at the position where the output shaft inserts into the feed hopper 1. The sealed bearing 7 ensures the stable rotation of the electrostatic tube 6 and prevents leakage of materials within the feed hopper 1. The servo motor 5 drives the electrostatic tube 6 in rotation, while the electrostatic pulse power supply 9 is fixedly mounted on the outer side of the sorting bin 8 and electrically connected to the electrostatic tube 6 via brushes, supplying power to the electrostatic tube 6 according to a set period T. Carbon black particles entering the charging channel 201 are gradually dispersed and charged by the combined effects of the electrostatic field, the mechanical force generated by the rotation of the electrostatic tube 6, and the nitrogen flow. This periodic power supply and the rotating design of the electrostatic tube 6 can achieve differentiated charge loading of the carbon black particles. Since small-particle carbon black has a large specific surface area and high surface curvature, it is easier to carry more charge in this environment, providing a basis for subsequent precise sorting.

[0042] 3. Ultrasonic sorting space: Figure 1 、 Figure 3 、 Figure 4, comprising a sorting bin 8, a high-frequency ultrasonic transducer 10, an arc-shaped electrostatic plate 11, a vibrator 12, a large particle channel 803, and a small particle channel 804. A sorting chamber 801 is provided in the sorting bin 8, the upper part of the sorting chamber 801 is connected to the charged channel 201, and a large particle channel 803 and a small particle channel 804 are provided at the bottom. The high-frequency ultrasonic transducer 10 is arranged on both sides of the sorting bin 8 and is located directly above the large particle channel 803. When the charged carbon black particles enter the sorting bin 8, the high-frequency ultrasonic transducer 10 is activated, and the ultrasonic wave generated by it can destroy the agglomeration force between the carbon black particles, so that the carbon black particles are separated from each other into independent individuals, laying the foundation for subsequent precise sorting. The arc-shaped electrostatic plate 11 is located above the small particle channel 804, and its voltage intensity distribution gradually increases from top to bottom, with the lower end extending into the upper area of ​​the small particle channel 804. Because small-sized carbon black particles carry a large charge and relatively small mass, they accelerate toward the curved electrostatic plate 11 under the influence of the opposite electrostatic attraction generated by the gradient voltage field of the curved electrostatic plate 11. A vibrator 12 is located on the back side of the curved electrostatic plate 11. Once the small-sized carbon black particles are adsorbed onto the curved electrostatic plate 11, the vibrator 12 is activated, causing the curved electrostatic plate 11 to vibrate. This allows the small-sized carbon black particles attached to the surface of the curved electrostatic plate 11 to break free from the electrostatic adsorption and exit the sorting chamber 801 through the small particle channel 804. Furthermore, a nitrogen replenishment pipe 15 is located at the top of the sorting chamber 8, facing the outlet of the large particle channel 803. Because the large-sized carbon black particles carry a smaller charge and have a larger mass, they continue to move downward under the influence of gravity and the vertical downward airflow from the nitrogen replenishment pipe 15, ultimately exiting the sorting chamber 801 through the large particle channel 803. At the same time, a diverter baffle 802 is provided at the bottom of the servo motor 5, which is horizontally lower than the high-frequency ultrasonic transducer 10. The large particle channel 803 is located on one side of the diverter baffle 802, and the small particle channel 804 is located on the other side of the diverter baffle 802. The diverter baffle 802 helps to guide carbon black particles of different particle sizes into the corresponding channels respectively, thereby achieving precise separation.

[0043] Example 2: The carbon black particle separation method designed in the present invention has the following specific working principles:

[0044] Step 1: Raw Material Delivery and Initial Dispersion: The carbon black raw material is delivered from injection pipe 101 to injection chamber 102. It then slides down injection chamber 102 by gravity into guide channel 103. Nitrogen injection pipe 3 is opened, and the nitrogen flow propels the carbon black raw material in guide channel 103 into charge loading pipe 2, achieving initial dispersion and creating favorable conditions for subsequent charge loading.

[0045] Step 2: Charge loading: The electrostatic pulse power supply 9 supplies power to the electrostatic tube 6 according to the set period T, and the servo motor 5 drives the electrostatic tube 6 to rotate. The carbon black particles entering the charged channel 201 are gradually dispersed and charged under the combined action of the electrostatic field, the mechanical force generated by the rotation of the electrostatic tube 6, and the nitrogen gas flow. As these actions continue, the charged carbon black particles continue to move forward in the channel until they leave the charged channel 201 and enter the sorting bin 8. This process realizes the differentiated charge loading of the carbon black particles. Carbon black particles of different particle sizes carry different amounts of charge, preparing for subsequent sorting based on charge and particle size differences.

[0046] Step 3: Particle Separation Pretreatment: After the charged carbon black particles enter the sorting chamber 8, the high-frequency ultrasonic transducer 10 is activated. The ultrasonic waves generated by the high-frequency ultrasonic transducer 10 act on the carbon black particles, breaking the agglomeration between the particles and separating them into independent entities. In the subsequent sorting process, each particle can move according to its own charge and mass characteristics, improving the sorting accuracy.

[0047] Link 4, sorting of particles of different particle sizes: Large-sized carbon black particles carry less charge and have a larger mass. Under the action of gravity and the vertical downward airflow from the nitrogen replenishment pipe 15, they continue to move downward and are eventually discharged from the sorting chamber 801 through the large particle channel 803, thereby collecting large-sized carbon black particles. Small-sized carbon black particles carry a large charge and have a relatively small mass. Under the action of the opposite electrostatic attraction generated by the gradient voltage field of the arc-shaped electrostatic plate 11, they accelerate toward the arc-shaped electrostatic plate 11 and are adsorbed onto the arc-shaped electrostatic plate 11.

[0048] Step 5: Vibration Discharge and Collection: After the small-sized carbon black particles are adsorbed onto the curved electrostatic plate 11, the vibrator 12 is activated. This vibrator vibrates the curved electrostatic plate 11, causing the small-sized carbon black particles attached to the surface of the curved electrostatic plate 11 to break free from the electrostatic adsorption and be discharged from the separation chamber 801 through the small particle channel 804, completing the collection of the small-sized carbon black particles and thus completing the entire separation process.

[0049] Example 3: The equipment of the present invention is applicable to the parameter setting when separating carbon black for rubber, as follows:

[0050] (1) Equipment parameter setting

[0051] Multi-channel flow distribution assembly: The feed hopper's injection tube has a diameter of 50mm to accommodate the typical delivery rates of rubber carbon black. The feed channel is tilted at a 45° angle to ensure smooth flow of the carbon black feedstock without causing excessive slump, which could affect subsequent dispersion. The charge loading pipeline features four sets of charged channels, each with a regular hexagonal cross-section and a side length of 20mm. This increases the contact area with the carbon black particles and enhances the charge loading effect. The nitrogen injection tube has a diameter of 15mm, and the airflow valve adjusts the nitrogen flow rate to 5m³ / h, ensuring effective dispersion of the carbon black feedstock and assisting its entry into the charged channels.

[0052] Periodic electrostatic assembly: The electrostatic tube is made of stainless steel, with a diameter of 10mm, and runs through the axis of the charged channel. A servo motor with a torque of 2N·m and a speed of 1500r / min is used to stably rotate the electrostatic tube. The electrostatic pulse power supply is set to a cycle T of 0.5s, with an output voltage range of 0-10kV. This is flexibly adjusted according to the characteristics of the carbon black, resulting in differentiated charges for carbon black particles of different particle sizes.

[0053] Ultrasonic sorting space: The sorting chamber measures 500mm long, 400mm wide, and 600mm high, meeting the space requirements for rubber carbon black sorting. The high-frequency ultrasonic transducer, set at 40kHz and 300W, effectively destroys carbon black agglomerates. The curved electrostatic plate is made of copper, 400mm long and 150mm wide. The voltage intensity gradually increases from 5kV at the top to 10kV at the bottom, ensuring that small carbon black particles are precisely adsorbed. The vibrator uses an electromagnetic vibrator with a vibration frequency of 20Hz and an amplitude of 0.5mm, which allows small carbon black particles adsorbed on the curved electrostatic plate to be smoothly detached.

[0054] (2) Sorting method operation process setting

[0055] Raw material transportation and preliminary dispersion: The carbon black raw material for rubber is transported to the injection chamber through the injection pipe at a speed of 5kg / min. The raw material slides into the material guide channel under the action of gravity. The nitrogen injection pipe is opened and the raw material is blown into the charge loading pipe with a stable nitrogen flow to achieve preliminary dispersion.

[0056] Charge loading: The electrostatic pulse power supply supplies power to the electrostatic tube at a cycle of 0.5s. The servo motor drives the electrostatic tube to rotate at high speed. Under the action of various forces, the carbon black particles are gradually dispersed and charged. After about 10s, the charge loading process is completed and the carbon black particles enter the sorting bin.

[0057] Particle separation pretreatment: After the carbon black particles enter the sorting bin, the high-frequency ultrasonic transducer is started and works continuously for 30 seconds to destroy the carbon black agglomerates and make the particles into independent individuals.

[0058] Sorting of particles of different sizes: Large-sized carbon black particles are discharged from the large particle channel within 5 seconds under the action of gravity and nitrogen supply pipe airflow (airflow velocity 0.5m / s); small-sized carbon black particles are quickly adsorbed onto the curved electrostatic plate under the attraction of the curved electrostatic plate gradient voltage.

[0059] Vibration discharge and collection: Start the vibrator, vibrate for 10 seconds at a time, and collect the particles at intervals of 10 seconds to discharge the small-sized carbon black particles from the small particle channel, completing the sorting process and collecting rubber carbon black products of different particle sizes.

[0060] Example 4: The equipment of the present invention is applicable to the parameter setting when separating carbon black for ink, as follows:

[0061] (1) Equipment parameter setting

[0062] Multi-channel flow distribution assembly: The injection tube diameter is adjusted to 30mm to accommodate the relatively small processing volume of carbon black for inks. The feed channel is inclined at a 30° angle to prevent the carbon black raw material from sliding too quickly. The charge loading pipeline has three sets of charged channels with a sawtooth cross-section, a tooth height of 5mm, and a tooth pitch of 8mm, to enhance the charge loading effect on the carbon black particles used in inks. The nitrogen injection tube has a diameter of 10mm, and the nitrogen flow rate is controlled at 3m³ / h.

[0063] Periodic electrostatic assembly: The electrostatic tube is made of titanium alloy, with a diameter of 8mm. The servo motor has a torque of 1.5N·m and a speed of 2000r / min. The electrostatic pulse power supply cycle T is set to 0.3s, and the output voltage range is 0-8kV, meeting the charging requirements of carbon black particles used in inks.

[0064] Ultrasonic sorting chamber: The sorting chamber measures 400mm long, 300mm wide, and 500mm high. The high-frequency ultrasonic transducer operates at 50kHz and 200W power. The curved electrostatic plate is 300mm long and 100mm wide, with voltage increasing from 4kV at the top to 8kV at the bottom. The vibrator operates at a frequency of 25Hz and an amplitude of 0.3mm.

[0065] (2) Sorting method operation process setting

[0066] Raw material transportation and preliminary dispersion: The carbon black raw material for ink is transported to the injection cavity through the injection pipe at a speed of 3kg / min, and is blown into the charge loading pipe with the help of nitrogen gas flow to achieve preliminary dispersion.

[0067] Charge loading: The electrostatic pulse power supply is powered at a 0.3s cycle, and the servo motor drives the electrostatic tube to rotate rapidly. The carbon black particles complete charge loading within about 8s and enter the sorting bin.

[0068] Particle separation pretreatment: Start the high-frequency ultrasonic transducer and work for 20 seconds to break up the carbon black agglomerates.

[0069] Sorting of particles of different sizes: Large carbon black particles are discharged from the large particle channel within 4 seconds under the action of gravity and nitrogen supply pipe airflow (airflow velocity 0.3m / s). Small carbon black particles are adsorbed on the curved electrostatic plate.

[0070] Vibration discharge and collection: Start the vibrator, vibrate for 8 seconds, and collect for 8 seconds, so that small-sized carbon black particles are discharged from the small particle channel, completing the sorting and collection of carbon black for ink.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated device for selecting and separating carbon black particles, characterized by: It includes multi-channel shunt components, periodic electrostatic components, and ultrasonic sorting space that are installed in coordination with each other; The multi-channel flow dividing component comprises a feed bin (1), a charge loading pipe (2) connected to the feed bin (1), and a nitrogen injection pipe (3) for injecting a nitrogen gas flow into the charge loading pipe (2); the feed bin (1) comprises an internal injection cavity (102), an injection pipe (101) connected to the injection cavity (102), and a material guide channel (103) located below the injection cavity (102); and the charge loading pipe (2) is provided with 3-5 groups of parallel distributed charged channels (201); The periodic electrostatic assembly includes an electrostatic tube (6) running through each charged channel (201), a servo motor (5) for driving the electrostatic tube (6) to rotate, and an electrostatic pulse power supply (9) electrically connected to the electrostatic tube (6) via a brush. The ultrasonic sorting space includes a sorting chamber (8), high-frequency ultrasonic transducers (10) arranged on both sides of the sorting chamber (8), and an arc-shaped electrostatic plate (11) for electrostatically sorting carbon black particles; Among them, a sorting chamber (801) is provided in the sorting bin (8), the upper part of the sorting chamber (801) is connected to the charged channel (201), and a large particle channel (803) and a small particle channel (804) are provided at the bottom of the sorting chamber (801). A nitrogen replenishing pipe (15) is provided on the top of the sorting bin (8) and is directly opposite to the gas outlet of the large particle channel (803). The high-frequency ultrasonic transducer (10) is located directly above the large particle channel (803), the arc-shaped electrostatic plate (11) is located above the small particle channel (804), and a vibrator (12) is provided on the back side of the arc-shaped electrostatic plate (11).

2. The integrated equipment for selecting and separating carbon black particles according to claim 1, characterized in that: The material guide channel (103) is arranged at an angle and communicates with the charged channel (201). The nitrogen injection pipe (3) is directly opposite to the material guide channel (103) and is provided with an air flow valve (4).

3. The integrated equipment for selecting and separating carbon black particles according to claim 1, characterized in that: The electrostatic tube (6) passes through the axis of the charged channel (201); The charged channel (201) has a non-circular cross section, including any regular polygon, trapezoid or sawtooth shape.

4. The integrated equipment for selecting and separating carbon black particles according to claim 1, characterized in that: The servo motor (5) is fixedly mounted on the bottom outside the feed bin (1), the output shaft of the servo motor (5) is fixedly connected to the electrostatic tube (6), and a sealed bearing (7) is provided at the position where the output shaft of the servo motor (5) is inserted into the feed bin (1).

5. The integrated equipment for selecting and separating carbon black particles according to claim 1, characterized in that: A diversion baffle (802) is provided at the bottom of the sorting bin (8) and is located at a horizontal position lower than the high-frequency ultrasonic transducer (10). The large particle channel (803) is located on one side of the diversion baffle (802), and the small particle channel (804) is located on the other side of the diversion baffle (802).

6. The integrated equipment for selecting and separating carbon black particles according to claim 1, characterized in that: The electrostatic pulse power supply (9) is fixedly installed outside the sorting bin (8), the electrostatic tube (6) passes through the upper area of ​​the sorting cavity (801), and a sealed bearing (7) is provided at the connection position between the electrostatic tube (6) and the sorting bin (8); The charged area of ​​the electrostatic tube (6) is located within the charged channel (201).

7. The integrated equipment for selecting and separating carbon black particles according to claim 1, characterized in that: The voltage intensity distribution of the arc-shaped electrostatic plate (11) gradually increases from top to bottom, and the lower end of the arc-shaped electrostatic plate (11) extends into the upper area of ​​the small particle channel (804).

8. A separation method applied to the integrated equipment for beneficiation and separation of carbon black particles according to any one of claims 1 to 7, characterized in that: Includes the following: S1. The carbon black raw material is transported from the injection pipe (101) to the injection cavity (102). Under the action of gravity, the carbon black raw material slides along the injection cavity (102) to the guide channel (103); Open the nitrogen injection pipe (3) and, with the help of the driving force of the nitrogen gas flow, blow the carbon black raw material in the material guide channel (103) into the charge loading pipe (2); S2. The electrostatic pulse power supply (9) supplies power to the electrostatic tube (6) according to the set period T, and the servo motor (5) drives the electrostatic tube (6) to rotate; The carbon black particles entering the charged channel (201) are gradually dispersed and charged under the combined effects of the electrostatic field, the mechanical force generated by the rotation of the electrostatic tube (6), and the nitrogen gas flow; As the above-mentioned action continues, the charged carbon black particles continue to move forward in the channel until they leave the charged channel (201) and enter the sorting bin (8); S3. After the charged carbon black particles enter the sorting chamber (8), the high-frequency ultrasonic transducer (10) is activated; Under the action of ultrasonic waves generated by the high-frequency ultrasonic transducer (10), the carbon black particles are separated from each other and become independent individuals, laying the foundation for subsequent precise sorting; S4. In the sorting chamber (8), carbon black particles of different particle sizes carry different charges and exhibit different motion trajectories during the sorting process: S4.

1. Large-sized carbon black particles, due to their low charge and large mass, continue to move downward under the influence of gravity and the vertical downward airflow from the nitrogen supply pipe (15), and are eventually discharged from the separation chamber (801) through the large particle channel (803); S4.

2. Small-sized carbon black particles have a large charge and a relatively small mass. Under the influence of the opposite electrostatic attraction generated by the gradient voltage field of the arc-shaped electrostatic plate (11), they accelerate toward the arc-shaped electrostatic plate (11). S5. After the small-size carbon black particles are adsorbed onto the arc-shaped electrostatic plate (11), the vibrator (12) is started, and the vibrator (12) causes the arc-shaped electrostatic plate (11) to vibrate; Under the action of vibration, the small-sized carbon black particles attached to the surface of the arc-shaped electrostatic plate (11) are separated from the electrostatic adsorption and discharged from the sorting cavity (801) through the small particle channel (804), thereby realizing the collection of carbon black particles of different particle sizes and completing the entire sorting process.

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