A compound impurity removal device based on airflow type dynamic layered paving technology

Abstract

The utility model discloses a compound type edulcoration equipment based on airflow type dynamic layering material laying technology, include: feeding subassembly, it is used for uniform conveying material, winnowing edulcoration device, winnowing edulcoration device sets up at the output of feeding subassembly, is used for winnowing edulcoration to material, dynamic layering material laying device, dynamic layering material laying device sets up at the lower right part of winnowing edulcoration device, is used for conveying after winnowing edulcoration material, electrostatic edulcoration device, electrostatic edulcoration device sets up at the upper portion of dynamic layering material laying device, is used for processing the material above dynamic layering material laying device. The utility model discloses reasonable in design, easy operation can ensure the accuracy of the process of rejecting, reduce unnecessary loss, ensure the stability and consistency of final product, greatly improve the purification rate and quality of product.

Description

Technical Field

[0001] This utility model relates to a composite impurity removal device based on airflow dynamic layered material spreading technology, belonging to the technical field of tobacco processing equipment. Background Technology

[0002] Generally, in the production of tobacco leaves through threshing and re-drying, from the initial unpacking and sorting process to the final packaging, many processing steps are required. Each step generates a certain amount of tobacco fragments. After these fragments are collected, they contain many different kinds of impurities, which must be thoroughly removed and purified before they can be mixed back into the finished tobacco leaves.

[0003] Currently, most leaf re-drying enterprises use manual sorting, relying on visual identification and manual removal of impurities. This method not only consumes a large amount of manpower, but the removal effect is also affected by subjective factors such as worker fatigue and skill level, resulting in problems such as missed items and incomplete removal. Each production line also requires several dedicated sorting personnel, leading to extremely high annual labor costs. In high-volume scenarios, the speed of manual sorting is difficult to keep up with the production pace, and the missed detection rate increases significantly with the increase in processing volume.

[0004] Some companies use simple air classifiers or electrostatic precipitators to remove impurities from broken tobacco sheets. Air classifiers can only achieve preliminary classification based on gravity and cannot solve the problem of separating impurities with similar densities; electrostatic precipitators require high conductivity of the material and can only remove impurities from the upper surface, resulting in incomplete removal.

[0005] Some manufacturers have realized that a single impurity removal method has limited effectiveness in removing impurities from broken tobacco sheets. They have tried to develop some devices that combine hemp fiber removal with impurity removal methods such as photoelectric, air separation, and screening. However, there has been little exploration of collaborative or tightly integrated methods for the process, and the results have been equally unsatisfactory.

[0006] Some tobacco leaf re-drying enterprises have attempted to build dedicated production lines for removing impurities from shredded tobacco leaves. These lines integrate multi-stage screening, air separation, and photoelectric impurity removal equipment for shredded tobacco leaf impurity removal. However, these lines require large investments, high energy consumption, and large floor space.

[0007] A search revealed that Chinese utility model patent CN102119783A discloses a multifunctional method and equipment for removing impurities from tobacco leaves by wind separation, relating to the tobacco industry's leaf re-drying or tobacco processing technology and equipment. The steps of this utility model are as follows: a. After being spread by a cloth-laying device, the tobacco leaves are fed into the wind separation chamber of the wind separation device via a feeding device; b. Inside the wind separation chamber, the material is separated into three parts by the wind separation device: light impurities, heavy impurities, and tobacco leaves; c. After vibration screening, heavy impurities and a very small amount of tobacco leaves fall from the gap between the rollers of the roller mechanism onto the conveyor belt below, while the tobacco leaves are sent to the tobacco leaf outlet via the roller mechanism; d. The light impurities that fall into the conveying equipment in step b are conveyed to the screening equipment, and the screened tobacco dust and tobacco flakes are removed by a hemp fiber removal device before being conveyed to subsequent equipment, while the impurities are discharged from the outlet. During the use of this equipment, the structure of the screening device is not clearly defined, and the screening effect is unknown. At the same time, the air separation chamber of this equipment may affect the impurity removal effect, resulting in low purity of tobacco leaves.

[0008] Therefore, the key to solving the above-mentioned technical problems lies in developing a composite impurity removal device based on airflow dynamic layered material spreading technology with good impurity removal effect. Utility Model Content

[0009] In view of the many defects and shortcomings of the above-mentioned background technology, this utility model has made improvements and innovations, aiming to provide a reasonable and easy-to-operate composite impurity removal device based on airflow dynamic layered material spreading technology. This device solves the industry pain points of traditional shredded tobacco impurity removal process, such as heavy reliance on manual labor, low efficiency of single equipment, and high cost of dedicated production lines. It ensures the accuracy of the removal process, reduces unnecessary losses, ensures the stability and consistency of the final product, and greatly improves the purification rate and quality of the product.

[0010] Another objective of this invention is the provision of a material collection device, which is used to collect materials that have been removed by an air separation and electrostatic purification device, thereby achieving the collection and sorting of materials.

[0011] Another objective of this invention is that, due to the inclusion of a cleaning and collection device, it not only collects the residue after cleaning by the wiping roller, but also transports the residue to an external debris collection box.

[0012] To solve the above problems and achieve the above-mentioned utility model objectives, this utility model provides a composite impurity removal device based on airflow dynamic layered material spreading technology, which is achieved by adopting the following design structure and the following technical solution:

[0013] A composite impurity removal device based on airflow-based dynamic layered material spreading technology includes:

[0014] A feeding assembly used to uniformly convey materials;

[0015] An air-separation and impurity removal device is installed at the output end of the feeding assembly and is used to remove impurities from the material by air separation.

[0016] The dynamic layered material spreading device is located at the lower right of the air separation and impurity removal device and is used to convey the material after air separation and impurity removal.

[0017] An electrostatic impurity removal device is installed above the middle of the dynamic layered material spreading device to process the material above the dynamic layered material spreading device.

[0018] Preferably, it also includes a material collection device and a discharge port of the material collection device.

[0019] Preferably, it also includes a cleaning and collection device, which is disposed on one side of the electrostatic purification device.

[0020] Preferably, the cleaning collection device includes:

[0021] Wiping rollers are used to remove deposits from circular electrostatic cloths.

[0022] The hemp fiber collection and output device is located below the wiping roller and is used to collect the residue after the wiping roller has cleaned it, and then transport the residue to an external debris collection box.

[0023] Preferably, the feeding assembly includes a feeding platform, a conveying device, and a paving device arranged in sequence, wherein the feeding end of the conveying device is located below the discharging end of the feeding platform, and the discharging end of the conveying device is inclined upward and located above the feeding end of the paving device.

[0024] Preferably, the feeding end of the conveying device is equipped with a material equalization device to control the flow rate of the material;

[0025] The paving equipment is equipped with a vibrating conveyor for uniformly conveying materials; the paving equipment is also equipped with a dovetail plate type material distribution device, which is used to adjust the paving width of the materials.

[0026] Preferably, the air separation and impurity removal device includes:

[0027] The air separation chamber is connected at one end of its upper part to the discharge end of the paving equipment.

[0028] The air classifier fan has its outlet connected to the air classifier chamber located below the discharge end of the paving equipment.

[0029] The heavy debris discharge hopper is connected to the air separation chamber located below the air separation fan.

[0030] Preferably, the air separation and impurity removal device further includes an adjustable baffle. The adjustable baffle is located at the upper end of the heavy impurity hopper, away from the air separation blower. The height and tilt angle of the adjustable baffle are adjustable. The adjustable baffle is used to adjust the size of the feed inlet of the heavy impurity hopper.

[0031] The air outlet duct of the air classifier is also connected to an air direction adjustment plate, which is a louver type and is used to adjust the airflow direction entering the air classifier chamber.

[0032] Preferably, the air separation and impurity removal device further includes a dust extraction system disposed above the air separation chamber, the dust extraction system comprising:

[0033] The circulating mesh belt equipment is installed in the upper part of the air separation chamber;

[0034] The dust extraction chamber is connected to the upper part of the air separation chamber.

[0035] Negative pressure suction dust removal fan, the negative pressure suction dust removal fan is installed on the dust outlet pipe of the dust extraction chamber;

[0036] The butterfly valve is installed inside the dust outlet pipe and is located in front of the negative pressure suction dust removal fan.

[0037] The butterfly valve is used to adjust the airflow force of the negative pressure suction.

[0038] Preferably, the electrostatic impurity removal device includes a ring conveyor, and a ring electrostatic cloth is provided on the ring conveyor belt of the ring conveyor, wherein cloth filaments are also provided on the ring electrostatic cloth.

[0039] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0040] 1. This utility model achieves efficient separation of heavy impurities (metals, stones), light impurities (hemp fibers, hemp down, fine fibers) and dust in broken tobacco flakes through the coordinated linkage of air separation, dynamic stratification and electrostatic impurity removal. It solves the industry pain points of heavy reliance on manual labor, low efficiency of single equipment and high cost of dedicated production lines in the traditional broken tobacco flake impurity removal process, thereby improving the purification rate and product quality of broken tobacco flakes.

[0041] 2. The air separation and impurity removal of this utility model can utilize the combined effect of positive airflow and negative pressure suction to separate heavy impurities, fine hemp fibers, and dust entrained in the material based on the differences in the individual weight and aerodynamic characteristics of the material.

[0042] 3. The dynamic layered material spreading of this utility model achieves layered spreading of materials and light impurities on the conveyor belt of the dynamic layered material spreading device at the bottom of the specially designed air separation chamber through the combined action of positive airflow and negative pressure suction. This makes the light impurities visible on the upper surface of the materials, which effectively solves the problem of incomplete impurity removal caused by impurities mixed in the middle of the materials in traditional impurity removal processes.

[0043] 4. The speed difference between the running speed of the annular electrostatic cloth for electrostatic removal and the running speed of the conveyor belt of the dynamic layered material laying device creates a speed difference. Through frictional electrification and the backward hooking of the cloth fibers on the annular electrostatic cloth, the efficient removal of impurities such as light hemp fibers is achieved.

[0044] 5. This utility model can achieve efficient impurity removal. With a production capacity of 600kg / h, the removal rate of light impurities and hemp fibers is as high as ≥95%, the removal rate of heavy impurities is ≥98%, and the false removal rate is ≤5%. This ensures the accuracy of the removal process, reduces unnecessary losses, ensures the stability and consistency of the final product, and greatly improves the purification rate and quality of the product.

[0045] 6. This utility model is equipped with a material collection device, which is used to collect materials after they have been removed by the air separation and electrostatic removal devices, thereby realizing the collection and sorting of materials.

[0046] 7. Because this utility model is equipped with a cleaning and collection device, it can not only collect the residue after the wiping roller has cleaned it, but also transport the residue to an external debris collection box. Attached Figure Description

[0047] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0048] Figure 1 This is one of the usage state diagrams of this utility model;

[0049] Figure 2 This is the second diagram showing the usage state of this utility model;

[0050] Figure 3 This is the third diagram showing the usage state of this utility model;

[0051] Figure 4 This is a schematic diagram of the overall structure of this utility model;

[0052] Figure 5 This is the left view of this utility model;

[0053] Figure 6 This is the right view of this utility model;

[0054] Figure 7 This is one of the partial structural schematic diagrams of this utility model;

[0055] Figure 8 This is the second partial structural schematic diagram of this utility model;

[0056] Figure 9 This is a utility model Figure 8 Rear view;

[0057] Figure 10 This is the third partial structural schematic diagram of this utility model;

[0058] In the figure, the numbers are: 1—feeding component, 11—loading platform, 12—conveyor, 121—material distribution device, 13—paving equipment;

[0059] 2—Air separation and impurity removal device, 21—Air separation chamber, 22—Air separation fan, 23—Heavy impurity discharge hopper, 24—Adjustable baffle, 25—Air direction adjustment plate, 26—Circulating mesh belt equipment, 27—Dust extraction chamber, 271—Dust outlet pipe, 28—Negative pressure suction dust removal fan, 29—Butterfly valve;

[0060] 3—Dynamic layered material spreading device;

[0061] 4—Electrostatic removal device; 41—Annular electrostatic cloth; 411—Cloth filaments;

[0062] 5—Material collection device;

[0063] 6—Cleaning and collecting device; 61—Wiping roller; 62—Hemp fiber collection and output device;

[0064] 9—Materials, 91—Hemp fiber. Detailed Implementation

[0065] To make the technical means, inventive features, objectives, and effects of this utility model readily understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0066] Example 1

[0067] As per the instruction manual Figures 1 to 10 As shown, a composite impurity removal device based on airflow dynamic layered material spreading technology includes:

[0068] Feeding assembly 1, which is used to uniformly convey material 7;

[0069] Air separation and impurity removal device 2 is installed at the output end of the feeding assembly 1 and is used to perform air separation and impurity removal on the material 7;

[0070] Dynamic layered material spreading device 3 is located at the lower right of air separation and impurity removal device 2 and is used to convey the material 7 after air separation and impurity removal.

[0071] Electrostatic impurity removal device 4 is located above the middle part of the dynamic layered material spreading device 3 and is used to process the material 7 above the dynamic layered material spreading device 3.

[0072] The dynamic layered material spreading device 3 is a ring belt conveyor used to receive and transport the material 7 falling from the air separation chamber 21. The conveying direction is towards the electrostatic impurity removal device 4. Since the individual weight of the material 7 is greater than the individual weight of the light impurities it carries, the material 7 has a relatively short suspension time in the air separation chamber 21 under the blowing of the airflow. It always falls onto the conveyor belt surface of the dynamic layered material spreading device 3 before the light impurities. The conveyor belt is always in a continuous running state. Finally, the material 7 is distributed on the conveyor belt surface, and the light impurities are distributed on the upper surface of the material 7.

[0073] Furthermore, the feeding assembly 1 includes a feeding platform 11, a conveying device 12, and a paving device 13 arranged in sequence, wherein the feeding end of the conveying device 12 is located below the discharging end of the feeding platform 11, and the discharging end of the conveying device 12 is inclined upward and located above the feeding end of the paving device 13.

[0074] In this invention, the feeding platform 11 is a manual feeding platform, and the conveying device 12 is equipped with a conveyor belt. The material 7 is stably and evenly fed to the paving equipment 13 under the action of the manual feeding platform and the conveyor belt. Furthermore, the feeding component 1 is not limited to the combination of the feeding platform 11, the conveying device 12, and the paving equipment 13, but can be any other type of equipment or method that can ensure stable and uniform feeding.

[0075] Specifically, the feeding end of the conveying device 12 is equipped with a material equalization device 121, which is used to control the flow rate of the material 7;

[0076] The paving equipment 13 is equipped with a vibrating conveyor for uniformly conveying the material 7; the paving equipment 13 is also equipped with a dovetail plate type material distribution device, which is used to adjust the paving width of the material 7.

[0077] In this invention, the feeding platform 11 is the material inlet, and its dimensions should facilitate material feeding. The material distribution device 121 has a material distribution roller to eliminate fluctuations in material flow. The paving equipment 13 has a dovetail plate-type material distribution device on its bottom plate at the feeding end, which can effectively adjust the paving width to ensure the uniformity and accuracy of the paving layer. The width of the paving equipment 13 is calculated and selected according to the formula "paving width = air separation chamber width - 200mm" to ensure that the material is dispersed as much as possible in the width direction of the air separation chamber 21 for better air separation effect.

[0078] Furthermore, the air separation and impurity removal device 2 includes:

[0079] The upper part of one end of the air classifier 21 is connected to the discharge end of the paving equipment 13;

[0080] The air classifier 22 has its air outlet connected to the air classifier chamber 21 located below the discharge end of the paving equipment 13.

[0081] Heavy debris discharge hopper 23 is connected and installed below the air separation chamber 21 located near the end of the air separation fan 22.

[0082] Specifically, the air separation and impurity removal device 2 also includes an adjustable baffle 24, which is located at the upper end of the heavy impurity hopper 23 away from the air separation blower 22. The height and tilt angle of the adjustable baffle 24 can be adjusted, and the adjustable baffle 24 is used to adjust the size of the feed inlet of the heavy impurity hopper 23.

[0083] The air outlet pipe of the air separator 22 is also connected to an air direction adjustment plate 25, which is a louver type and is used to adjust the airflow direction entering the air separator 21.

[0084] In this invention, an adjustable baffle 24 is connected to one end above the heavy debris hopper 23. The size of the inlet of the heavy debris hopper 23 can be adjusted according to actual conditions to control the inlet length of the hopper 23, thereby achieving thorough separation of heavy debris and ensuring effective separation. Simultaneously, the adjustable baffle 24 divides the lower part of the air separation chamber 21 into two sections, preventing the separated tobacco flakes from entering the heavy debris hopper 23. Inside the air separation chamber 21, during the descent of the material 7, relatively large debris such as stones, hemp fibers, and metal objects experience relatively small horizontal displacement and enter the heavy debris hopper 23 one by one for separation.

[0085] Preferably, a louvered air direction adjustment plate 25 is provided at the air outlet of the air duct of the air separator 22. By adjusting the air direction adjustment plate 25, the air direction of the airflow entering the air separator 21 can be adjusted between 0° and 45°.

[0086] Specifically, the air separation and impurity removal device 2 also includes a dust extraction system installed above the air separation chamber 21, the dust extraction system comprising:

[0087] The circulating mesh belt device 26 is installed in the upper part of the air separation chamber 21;

[0088] Dust extraction chamber 27 is connected to the upper part of air separation chamber 21;

[0089] Negative pressure suction dust removal fan 28 is installed on the dust outlet pipe 271 of the dust extraction chamber 27;

[0090] Butterfly valve 29 is installed inside the dust outlet pipe 271 and is located in front of the negative pressure suction dust removal fan 28;

[0091] Among them, butterfly valve 29 is used to adjust the airflow of negative pressure suction.

[0092] In this invention, the air separation and impurity removal device 2 separates heavy impurities based on density and aerodynamic characteristics, while simultaneously discharging fine hemp fibers and dust from the production line through the circulating mesh belt device 26 of the dust extraction system at the top of the air separation chamber 21 and the negative pressure suction dust removal fan 28.

[0093] In this invention, under the influence of the horizontal airflow from the air classifier 22 and the negative pressure dust extraction fan 28, light debris and broken tobacco pieces exhibit different trajectories. The broken tobacco pieces travel a relatively short horizontal distance and always fall onto the conveyor belt of the dynamic layering and spreading device 3 below the air classifier 21 before light debris such as hemp fibers. The hemp fibers and other light debris travel a relatively long horizontal distance and always fall onto the conveyor belt of the dynamic layering and spreading device 3 below the air classifier 21 later than the broken tobacco pieces. Since the conveyor belt of the dynamic layering and spreading device 3 is in continuous operation, light debris such as hemp fibers gradually fall onto the upper surface of the broken tobacco pieces and become exposed on the surface of the broken tobacco pieces. This is very beneficial for the subsequent electrostatic dust removal device 4 to completely remove these light debris.

[0094] Below the dust extraction port of the air classifier 21, there is a circulating mesh belt device 26 for fine hemp fibers. The lower layer of the circulating mesh belt device 26 covers the entire air classifier 21. The mesh aperture of the circulating mesh belt is larger than the dust particle size, which facilitates the dust particles to enter the dust extraction chamber 27, and can also effectively intercept fine hemp fibers in the airflow. Through the continuous circulation of the circulating mesh belt device 26, the hemp fibers on its lower surface can be carried out of the air classifier 21, and the speed of the circulating mesh belt device 26 is adjustable.

[0095] Preferably, a cleaning device is also provided at the outlet of the circulating mesh belt of the circulating mesh belt device 26. The cleaning device is a cleaning scraper, a cleaning brush, an air knife spray, or a water jet cleaning, which can clean the circulating mesh belt in real time and prevent the ventilation holes on the circulating mesh belt from becoming blocked. Furthermore, the cleaning device is located above the circulating mesh belt device 26 for cleaning the circulating mesh belt.

[0096] Preferably, a dust and hemp fiber interception and cleaning device is also provided at the negative pressure suction dust removal fan 28 of the dust outlet pipe 271 to prevent dust and fine hemp fibers from clogging the dust outlet pipe 271 after being sucked in.

[0097] Preferably, a suction system recovery box is also installed at the end of the dust outlet pipe 271.

[0098] Furthermore, the electrostatic impurity removal device 4 includes a ring conveyor, and a ring electrostatic cloth 41 is provided on the ring conveyor belt of the ring conveyor, wherein an array of cloth filaments 411 are also provided on the ring electrostatic cloth 41.

[0099] In this invention, the annular conveyor belt can also be made directly from electrostatic cloth; the cloth filaments 411 are used to hook the hemp fibers in the material.

[0100] The dynamic layered material spreading device 3 is connected and installed in the lower right part of the air separation chamber 21.

[0101] The specific impurity removal method of this equipment includes the following steps:

[0102] S1, material 7 is evenly conveyed through the feeding assembly 1 to the air separation chamber 21 of the air separation and impurity removal device 2;

[0103] S2, the material 7 in the air separation chamber 21 is separated into hemp fibers, heavy debris, tobacco leaves and dust under the blowing action of the air separation fan 22 and the suction action of the negative pressure suction dust removal fan 28.

[0104] S3, the material 7 after air separation and impurity removal is conveyed to the electrostatic impurity removal device 4 by the conveyor belt of the dynamic layering and spreading device 3.

[0105] S4, the electrostatic impurity removal device 4 performs electrostatic impurity removal on the material 7 on the conveyor belt of the dynamic layered material spreading device 3;

[0106] S5, when the electrostatic cleaning device 4 is working, the cleaning and collection device 6 cleans the hemp fibers and debris 91 on the annular electrostatic cloth 41 and transports the cleaned hemp fibers and debris 91 to the external debris collection box.

[0107] S6, the material 7 after passing through the electrostatic impurity removal device 4 is conveyed to the material collection device 5 by the conveyor belt of the dynamic layering material spreading device 3.

[0108] Specifically, in step 2, heavy debris enters the heavy debris hopper 23, and the broken tobacco flakes 7 fall and are laid on the conveyor belt of the dynamic layered material spreading device 3, while light debris falls on the broken tobacco flakes 7; dust and some fine hemp fibers are extracted by the dust extraction system into the suction system recovery box.

[0109] In step S2, the broken tobacco flakes 7 are uniformly fed into the air classifier chamber 21 for impurity removal. More specifically, after being conveyed by the vibrating paving equipment 13 into the air classifier chamber 21 via a "high-frequency scattering" method, the broken tobacco flakes 7, under the airflow provided by the air classifier fan 22, disperse within the chamber 21 due to differences in density, size, shape, and aerodynamic characteristics between the material particles, exhibiting differentiated horizontal movement along the airflow direction. As the distance between the material particles and the air inlet of the air classifier chamber increases, the force exerted by the airflow on the material particles gradually weakens, and the material particles move towards the lower part of the chamber cavity in a parabolic trajectory. During operation, by adjusting the wind speed and direction of the air classifier fan 22, impurity separation and material purification can be achieved.

[0110] Preferably, the feeding assembly 1, the air separation and impurity removal device 2, the dynamic layering and spreading device 3, the electrostatic impurity removal device 4, and the cleaning and collection device 6 of this utility model are all connected to external control equipment, and the operation and use of each component are controlled and adjusted through the external control equipment.

[0111] Before using the composite impurity removal equipment and method based on airflow dynamic layered material spreading technology, the above-mentioned design structure needs to be manufactured and installed as a backup.

[0112] In summary, the more specific working principle of this utility model is as follows:

[0113] The specific working principle of feeding component 1 is as follows:

[0114] Material 7, containing broken tobacco flakes, is collected from various process stages of the leaf re-drying production line. It enters the line through the feeding platform 11 and is conveyed by the conveying device 12 and the spreading equipment 13, resulting in a uniform and stable material flow.

[0115] The specific working principle of the air separation and impurity removal device 2 in this utility model is as follows:

[0116] 1. Separation of heavy and impurity materials: During the falling process of individual materials, the horizontal displacement of relatively large impurities such as small stones, hemp fibers, and metal objects is relatively small, and they eventually enter the heavy and impurity material discharge hopper 23 for separation.

[0117] 2. Dynamic Layered Spreading of Impurities: Under the combined action of the horizontal airflow from the air classifier 22 and the negative pressure dust extraction fan 28, light impurities and broken tobacco flakes are differentiated and fall from the material and light impurity discharge port at the lower right of the air classifier 21 onto the conveyor belt of the dynamic layered spreading device 3. Since the conveyor belt of the dynamic layered spreading device 3 is in continuous operation, broken tobacco flakes will always fall onto the conveyor belt of the dynamic layered spreading device before light impurities such as hemp fibers. Finally, broken tobacco flakes and light impurities such as hemp fibers form a layered spreading state on the conveyor belt of the dynamic layered spreading device. Light impurities are distributed on the upper surface of the broken tobacco flakes and are output from the air classifier 21 via the conveyor belt of the dynamic layered spreading device, entering the subsequent electrostatic impurity removal station.

[0118] 3. Removal of dust and fine linen: A dust extraction chamber 27 is connected to the upper part of the air separation chamber 21. The dust extraction chamber 27 is equipped with a dust extraction system. The negative pressure suction dust removal fan 28 transports the dust and light linen raised during the air separation process to the outside of the air separation chamber 21 through the circulating mesh belt filter of the circulating mesh belt device 26. Smaller particles are drawn through pipelines to the dust collector in the suction system recovery box for discharge. At the same time, the air separation chamber 21 is kept in a slightly negative pressure state to prevent the dust-laden airflow from overflowing.

[0119] In this utility model, the specific working principles of the dynamic layered material spreading device 3, the electrostatic impurity removal device 4, the material collection device 5, and the cleaning collection device 6 are as follows:

[0120] The dynamic layered material spreading device 3 outputs the broken tobacco flakes from below the air classifier chamber 21. Lightweight impurities such as hemp fibers are exposed on the surface of the broken tobacco flakes. Then, it enters below the electrostatic impurity removal device 4, where the lightweight impurities such as hemp fibers on the surface of the material are removed by electrostatic adsorption of the annular electrostatic cloth 41 and by the hooking of the cloth fibers.

[0121] More specifically, the surface of the annular electrostatic cloth 41 is in close contact with the upper surface of the material. Static electricity is generated through the relative friction between the surface of the electrostatic cloth and the fragmented material. At the same time, the cloth fibers on the surface of the electrostatic cloth, which are in a backward tilted state, hook onto debris such as hemp fibers.

[0122] At the same time, the linear speed of the wiping roller 61 rotates in the opposite direction to the linear speed of the annular electrostatic cloth 41, cleaning the hemp fibers adhering to the surface of the annular electrostatic cloth 41 and arranging the cloth fibers on the surface of the annular electrostatic cloth 41 so that they are in the same tilt direction to facilitate the removal of impurities in the next cycle; at the same time, the hemp fiber collection and output device 62 transports the adhering material cleaned by the wiping roller 61 to the external debris collection box.

[0123] Finally, the material 7, after being cleaned by the air separation and impurity removal device 2 and the electrostatic impurity removal device 4, enters the material collection device 5.

[0124] During use, the hemp fibers and debris 91 cleaned by the wiping roller 61 are discharged laterally through the hemp fiber collection and output device 62 and transported to one side of the production line, where they fall into the debris collection box below through the hopper.

[0125] During the electrostatic removal process, the speed of the annular electrostatic cloth 41 in the electrostatic removal device 4 is lower than the speed of the conveyor belt on the dynamic layering material spreading device 3. Due to the speed difference, friction occurs between the annular electrostatic cloth 41 and the material 7, which leads to the accumulation of static electricity. Through electrostatic action, the annular electrostatic cloth 41 can adsorb and remove light impurities exposed on the surface of the material 7, while the cloth fibers on the annular electrostatic cloth 41 will carry filamentous impurities to the annular electrostatic cloth 41 by hooking, thereby achieving further removal of impurities.

[0126] In the electrostatic impurity removal process, the dynamic layered material spreading device 3 conveys the material 7 and light impurities that have been removed by the air separation and impurity removal device 2 to the bottom of the electrostatic impurity removal device 4 via a conveyor belt. The light impurities are distributed on the upper surface of the material 7. The electrostatic impurity removal device 4 removes the light impurities such as light hemp fibers and hemp down from the upper surface of the material through two methods: electrostatic adsorption of the ring electrostatic cloth 41 and hooking of the cloth fibers.

[0127] Furthermore, the surface of the annular electrostatic cloth 41 is in close contact with the upper surface of the material and moves in the same direction as the material. However, the running speed of the annular electrostatic cloth is less than the running speed of the conveyor belt of the dynamic layering material spreading device. Static electricity is generated through the relative frictional movement between the surface of the annular electrostatic cloth 41 and the fragmented material. At the same time, the cloth fibers on the surface of the annular electrostatic cloth, which are in a backward tilted state, hook onto hemp fibers and other debris.

[0128] Example 2

[0129] This embodiment 2 is the same as embodiment 1, except that it also includes a material collection device 5, which is set at the outlet of the dynamic layered material spreading device 3.

[0130] In this embodiment, the usage is the same as that of embodiment 1, except that the material collection device 5 is used to collect the material 7 after it has been removed by the air separation and impurity removal device 2 and the electrostatic impurity removal device 4, so as to realize the collection and sorting of the material.

[0131] Meanwhile, the material collection device 5 is a square frame structure with an open top and closed bottom and sides.

[0132] Example 3

[0133] This embodiment 3 is the same as other embodiments, except that it also includes a cleaning collection device 6, which is located on one side of the electrostatic impurity removal device 4.

[0134] Specifically, the cleaning collection device 6 includes:

[0135] Wiping roller 61 is used to remove deposits from the annular electrostatic cloth 41.

[0136] The hemp fiber collection and output device 62 is located below the wiping roller 61 and is used to collect the attached material after the wiping roller 61 has cleaned it and transport the attached material to the external debris collection box.

[0137] In this invention, the hemp fiber collection and output device 62 has an automatic hemp fiber discharge function.

[0138] This embodiment 3 is the same as other embodiments, except that, in use, the treated deposits eventually fall into the cleaning collection device 6.

[0139] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A composite impurity removal device based on airflow dynamic layered material spreading technology, characterized in that: include: A feeding assembly (1) is used to uniformly convey materials (7); Air classifier (2) is installed at the output end of the feeding assembly (1) and is used to air classify and remove impurities from the material (7). Dynamic layered material spreading device (3) is located at the lower right of the air separation and impurity removal device (2) and is used to convey the material (7) after air separation and impurity removal. Electrostatic cleaning device (4) is located above the middle part of the dynamic layering material spreading device (3) and is used to process the material (7) above the dynamic layering material spreading device (3).

2. The composite impurity removal equipment based on airflow dynamic layered material spreading technology according to claim 1, characterized in that: It also includes a material collection device (5), which is set at the outlet of the dynamic layered material spreading device (3).

3. The composite impurity removal equipment based on airflow dynamic layered material spreading technology according to claim 1 or 2, characterized in that: It also includes a cleaning collection device (6), which is located on one side of the electrostatic cleaning device (4).

4. The composite impurity removal equipment based on airflow dynamic layered material spreading technology according to claim 3, characterized in that: The cleaning collection device (6) includes: Wiping roller (61) is used to remove deposits from the annular electrostatic cloth (41); The hemp fiber collection and output device (62) is located below the wiping roller (61) and is used to collect the attached material after the wiping roller (61) has cleaned it and transport the attached material to the external debris collection box.

5. The composite impurity removal equipment based on airflow dynamic layered material spreading technology according to claim 1, characterized in that: The feeding assembly (1) includes a feeding platform (11), a conveying device (12), and a paving device (13) arranged in sequence. The feeding end of the conveying device (12) is located below the discharging end of the feeding platform (11), and the discharging end of the conveying device (12) is inclined upward and located above the feeding end of the paving device (13).

6. The composite impurity removal equipment based on airflow dynamic layered material spreading technology according to claim 5, characterized in that: The feeding end of the conveying device (12) is equipped with a material equalization device (121) for controlling the flow rate of the material (7); The paving equipment (13) is equipped with a vibrating conveyor for uniformly conveying materials (7); the paving equipment (13) is also equipped with a dovetail plate material equalization device, which is used to adjust the paving width of the materials (7).

7. The composite impurity removal equipment based on airflow dynamic layered material spreading technology according to claim 1, characterized in that: The air separation and impurity removal device (2) includes: The upper part of one end of the air separation chamber (21) is connected to the discharge end of the paving equipment (13); The air classifier (22) has its air outlet connected to the air classifier chamber (21) located below the discharge end of the paving equipment (13); Heavy debris discharge hopper (23) is connected to the air separation chamber (21) located near the end of the air separation fan (22).

8. The composite impurity removal equipment based on airflow dynamic layered material spreading technology according to claim 7, characterized in that: The air separation and impurity removal device (2) also includes an adjustable baffle (24). The adjustable baffle (24) is located at the upper end of the heavy impurity discharge hopper (23) away from the air separation blower (22). The height and tilt angle of the adjustable baffle (24) can be adjusted. The adjustable baffle (24) is used to adjust the size of the feed inlet of the heavy impurity discharge hopper (23). Among them, the air outlet pipe of the air classifier (22) is also connected to the air direction adjustment plate (25), which is a louver type and is used to adjust the airflow direction entering the air classifier (21).

9. The composite impurity removal equipment based on airflow dynamic layered material spreading technology according to claim 8, characterized in that: The air separation and impurity removal device (2) also includes a dust extraction system installed above the air separation chamber (21), the dust extraction system including: The circulating mesh belt device (26) is installed in the upper part of the air separation chamber (21); Dust extraction chamber (27) is connected to the upper part of air separation chamber (21); Negative pressure suction dust removal fan (28) is installed on the dust outlet pipe (271) of the dust extraction chamber (27); Butterfly valve (29) is installed inside the dust outlet pipe (271) and located in front of the negative pressure suction dust removal fan (28); Among them, the butterfly valve (29) is used to adjust the wind force of negative pressure suction.

10. The composite impurity removal equipment based on airflow dynamic layered material spreading technology according to claim 1, characterized in that: The electrostatic cleaning device (4) includes a ring conveyor, and a ring electrostatic cloth (41) is provided on the ring conveyor belt of the ring conveyor, wherein cloth filaments (411) are also provided on the ring electrostatic cloth (41).

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