A fan dedusting and feeding device

Abstract

This utility model belongs to the technical field of tobacco processing equipment, and provides a blower-based impurity removal and feeding device, including an air classifier box, a blower, an ultrasonic atomizing unit, and a directional feeding unit. The top of the air classifier box has an impurity outlet. The blower is connected to the impurity outlet via a pipe and provides airflow at different speeds to the air classifier box, creating a high-speed impurity removal zone in the upper part and a low-speed feeding zone in the lower part. The ultrasonic atomizing unit is externally located at the bottom of the air classifier box and is connected to the low-speed feeding zone via an atomized liquid outlet. The directional feeding unit is used to directionally transport the atomized liquid generated by the ultrasonic atomizing unit through the atomized liquid outlet into the air classifier box, where it is adsorbed onto suspended fragments in the low-speed feeding zone. This utility model can perform graded control of the airflow field, not only completing air classification and impurity removal, but also using ultra-micro atomization technology and directional airflow to adhere liquid to the removed fragments, achieving integrated impurity removal and feeding.

Description

Technical Field

[0001] This application relates to the field of tobacco processing equipment technology, and in particular to a blower-based impurity removal and feeding device. Background Technology

[0002] Traditional tobacco leaf fragment processing requires separate steps for impurity removal (air separation) and feeding (mixing). Air separation equipment is large, energy-intensive, and the fragments are prone to secondary contamination during transport. Secondary processing can also damage the physical structure of the fragments, increasing the rate of further fragmentation. Lightweight impurities (feather density 0.15g / cm³) 3 Hemp fiber density: 0.18 g / cm³ 3 ) and fragments (density 0.203 g / cm³) 3 Due to their similar densities, conventional air separation can easily lead to misplacement of fragments or incomplete removal of impurities. Traditional feeding devices often use high-pressure nozzles, resulting in larger atomized particles and a fragment surface agglomeration rate exceeding 20%. Uneven spraying of the feed liquid affects the fragment absorption rate, with an effective feed liquid utilization rate of only 65.75%, and increases subsequent drying energy consumption. The tobacco industry's 2023 "Cigarette Processing Specifications" clearly requires that the fragment utilization rate must be ≥90%, the feed liquid absorption CV value ≤10%, and the standard for light impurity residues be 0 ppm for feathers and ≤0.1 mg / g for hemp fibers.

[0003] Currently available air separation equipment can only perform airflow separation and impurity removal. For example, patent CN214391131U discloses a tobacco leaf fragment separation, impurity removal and recycling equipment, which includes a manual feeding belt conveyor, a first-stage vibrating screen connected to the outlet of the manual feeding belt conveyor, an air separation and impurity removal feeding belt conveyor connected to the outlet of the first-stage vibrating screen, an air separation and impurity removal machine connected to the outlet of the air separation and impurity removal feeding belt conveyor, a tangential discharge device for impurity removal connected to the upper impurity outlet of the air separation and impurity removal machine, an electrostatic rejection device connected to the lower impurity outlet of the air separation and impurity removal machine, an air separator connected to the electrostatic rejection device, a sorting tangential discharge device connected to the first discharge port at the upper end of the air separator, a slow-speed manual picking belt conveyor connected to the lower discharge hopper of the air separator, a hemp fiber rejection machine located below the sorting tangential discharge device, and a second-stage vibrating screen connected to the hemp fiber rejection machine. The manual feeding belt conveyor of this equipment is used to add the initial material to be air-separated, rather than to add material to the fragments that have already been air-separated.

[0004] For example, patent CN222519174U discloses a material air separation device, including a box, a suction pipe, a suction fan, and a discharge pipe. The top of the box has an inlet, and the right side of the box extends outward to form a suction pipe inlet with a gradually decreasing diameter from left to right. The suction pipe is connected to the suction pipe inlet. The bottom wall of the box slopes downward from the right side to the left side, and the end of the bottom wall is connected to a downwardly oriented right pipe wall. A guide plate slopes downward to the right at the lower section of the left side wall, and a downwardly oriented left pipe wall is connected to the guide plate. The top of the right pipe wall is higher than the top of the left pipe wall, and the right and left pipe walls together form a discharge pipe. Although this device can improve the separation efficiency and effect of light impurities, it can only perform air separation and cannot integrate feeding, thus its function is limited. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a blower impurity removal and feeding device, which can classify and control the airflow field. It can not only complete air classification and impurity removal, but also use ultra-micro atomization technology and directional airflow to attach liquid to the impurity-removed fragments, thus achieving integrated impurity removal and feeding.

[0006] To achieve the above and related objectives, this utility model provides a blower-based impurity removal and feeding device, including an air classifier box, a blower, an ultrasonic atomizing unit, and a directional feeding unit. The top of the air classifier box is provided with an impurity outlet, and the bottom is provided with a material outlet. The blower is connected to the impurity outlet through a pipe and provides airflow at different speeds to the air classifier box, so that a high-speed impurity removal zone is formed in the upper part of the air classifier box and a low-speed feeding zone is formed in the lower part. The ultrasonic atomizing unit is externally located at the bottom of the air classifier box and is connected to the low-speed feeding zone through the atomized liquid outlet. The directional feeding unit is externally located at the bottom of the air classifier box near the atomized liquid outlet and is used to directionally transport the atomized liquid generated by the ultrasonic atomizing unit to the air classifier box through the atomized liquid outlet and adsorb it onto the suspended fragments in the low-speed feeding zone.

[0007] Furthermore, the ultrasonic atomizing unit includes a mounting box and an ultrasonic oscillator. The bottom of the mounting box is provided with an atomizing chamber, and the ultrasonic oscillator is installed in the atomizing chamber.

[0008] Furthermore, the directional feeding unit includes a fan, which is installed in the mounting box and located above the atomizing chamber.

[0009] Furthermore, the ultrasonic atomizing unit also includes a liquid tank with an outlet and an inlet on the mounting box. The liquid tank supplies liquid to the atomizing chamber through the outlet and the inlet.

[0010] Furthermore, a quantitative feeder is installed at the discharge port.

[0011] Furthermore, the speed of the metering feeder is the same as the atomization speed of the ultrasonic oscillator.

[0012] Furthermore, the directional feeding unit also includes an annular distributor located at the outlet of the atomized liquid.

[0013] Furthermore, the annular distributor includes multiple fan-shaped nozzles for forming tangential airflow.

[0014] Furthermore, an inclined guide plate is installed inside the air separator.

[0015] Furthermore, the vertical distance between the end of the inclined guide plate and the material outlet is 1 / 3 of the total height of the air classifier.

[0016] The beneficial technical effects of this utility model are as follows:

[0017] This invention achieves graded control of the airflow field through a fan, and constructs a high-speed impurity removal zone and a low-speed feeding zone inside the air classifier box, which can realize simultaneous impurity removal and feeding, shortening the process time by more than 40%.

[0018] This invention achieves molecular-level adsorption of atomized liquid onto suspended fragments through an ultrasonic atomization unit and a directional feeding unit, avoiding uncontrolled sedimentation caused by fragment humidification. Furthermore, compared to traditional processes, the liquid absorption efficiency is significantly improved (not exceeding 85%), with this invention achieving a liquid absorption rate exceeding 92%.

[0019] This invention features an inclined guide plate inside the air separator to extend the debris path, and combined with the decrease in airflow velocity gradient, the debris mis-discharge rate is less than 3%.

[0020] This invention enables the addition of materials to improve quality while removing impurities, effectively enhancing the quality of fragments and processing efficiency. Attached Figure Description

[0021] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without inventive effort. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the fan impurity removal and feeding device of this application;

[0023] Figure 2 This is a top view of the atomized liquid outlet of this application.

[0024] Figure Labels

[0025] 1: Air classifier box; 11: Debris outlet; 12: Material inlet; 17: Material outlet; 14: Atomized liquid outlet; 15: Fan connection end; 2: Liquid tank; 13: Discharge port; 16: Quantitative feeder; 21: Discharge port; 22: Liquid inlet; 3: Ultrasonic oscillator; 31: Atomization chamber; 6: Industrial fan; 61: Annular distributor; 4: Belt; 5: Material receiving box. Detailed Implementation

[0026] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of this invention (described in the context of separate embodiments for clarity) may also be provided in combination in a single embodiment. Conversely, multiple features of this invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of this invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The present invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of this invention are for illustrative purposes only and should not be construed as limiting the scope of protection of this invention. All equivalent changes or modifications made in accordance with the spirit and essence of this invention should be covered within the scope of protection of this invention.

[0027] like Figure 1 As shown, this application provides a blower-based impurity removal and feeding device, including an air classifier box 1, a blower, an ultrasonic atomizing unit, and a directional feeding unit. The top of the air classifier box 1 is provided with an impurity outlet 11, and the bottom is provided with a material outlet 17. The blower is connected to the impurity outlet 11 through a pipe and provides airflow at different speeds to the air classifier box 1, so that a high-speed impurity removal zone is formed in the upper part of the air classifier box 1 and a low-speed feeding zone is formed in the lower part. The ultrasonic atomizing unit is externally placed at the bottom of the air classifier box 1 and is connected to the low-speed feeding zone through an atomized liquid outlet 14. The directional feeding unit is externally placed at the bottom of the air classifier box 1 near the atomized liquid outlet 14 and is used to directionally transport the atomized liquid generated by the ultrasonic atomizing unit to the air classifier box 1 through the atomized liquid outlet 14 and adsorb it onto the suspended fragments in the low-speed feeding zone.

[0028] Furthermore, the air classifier box 1 of this application, serving as the site for air classification, impurity removal, and material feeding, needs to have a certain volume. For example, the material of the air classifier box 1 can be 316L stainless steel, with a length of 2000mm, a width of 1200mm, and a height of 2500mm. The specific volume of the air classifier box 1 is not limited here; it can be selected according to actual production needs. Furthermore, a material inlet 12 is provided on the side wall of the air classifier box 1, through which tobacco leaf fragments containing impurities enter the box from the top. The impurity outlet 11 at the top of the air classifier box 1 is connected to a suction pipe, which is connected to an external fan through its fan connection end 15. The power of the external fan can be 7.5kW, etc. This application generates an airflow field with a significant velocity gradient through the fan, so that the airflow velocity in the high-speed impurity removal zone can reach 8m / s~9m / s, for example 8.1m / s or 9m / s, which can effectively carry light impurities such as feathers and hemp fibers to the top impurity outlet 11 and enter the impurity collection cabinet at the fan end; while maintaining the airflow velocity in the low-speed feeding zone at 2m / s~2.5m / s, for example 2.3m / s or 2.5m / s, which can keep the fragmented materials in a suspended state and prevent them from being carried away. This application does not limit the power of the fan; by adjusting the power, the airflow velocity in the high-speed impurity removal zone and the low-speed feeding zone can be adjusted.

[0029] Furthermore, a belt 4 is provided below the material outlet 17 of the air classifier box 1 of this application, and the material after feeding is transported to the material receiving box 5 for use by the belt 4.

[0030] Furthermore, the air classifier 1 of this application is provided with an inclined guide plate (not shown in the figure). The angle between the inclined guide plate and the side wall of the air classifier 1 is 30°~40°, and the vertical distance between the end of the inclined guide plate and the material outlet 17 is 1 / 3 of the total height of the air classifier 1. This application effectively extends the suspension path of the fragments in the box by using the inclined guide plate, increases the processing time, and also guides the flow of fragments to prevent accumulation and blockage. Combined with the aforementioned reduction in airflow velocity gradient, the fragment mis-discharge rate of this application is <3%.

[0031] Furthermore, the ultrasonic atomization unit of this application includes a mounting box and an ultrasonic oscillator 3. An atomization chamber 31 is located at the bottom of the mounting box, and the ultrasonic oscillator 3 is installed within the atomization chamber 31. The mounting box is externally located at the bottom of the air classifier box 1. The ultrasonic oscillator 3 is used to convert the liquid material into extremely fine droplets, thereby achieving molecular-level adhesion. The ultrasonic oscillator 3 of this application can have a frequency of 1.7MHz, a power of 300W, etc., and produce a median particle size of 30μm for the atomized particles.

[0032] Furthermore, the ultrasonic atomizing unit of this application also includes a liquid tank 2, which has an outlet 13 and an inlet 13 on the mounting box. The liquid tank 2 supplies material to the atomizing chamber 31 through the outlet 13 and the inlet 13. The liquid tank 2 of this application has a liquid inlet 22 at the top and a discharge port 21 at the bottom. The liquid enters the liquid tank 2 from the liquid inlet 22 for storage. The liquid can be a liquid additive with a viscosity ≤200 cP, such as sugar or humectant.

[0033] Furthermore, a quantitative feeder 16 is provided at the discharge port 13 of this application. The liquid in the liquid tank 2 of this application enters the ultrasonic oscillator 3 through the quantitative feeder 16, and completes the atomization process in the atomization chamber 31. This ultrasonic atomization technology can generate ultra-fine droplets at the 10.50μm level, which is much smaller than the droplets generated by traditional atomization methods, and can greatly improve the contact area and adhesion uniformity between the liquid and the surface of the fragments.

[0034] Furthermore, the speed of the quantitative feeder 16 in this application is the same as the atomization speed of the ultrasonic oscillator 3. For example, the flow rate of the quantitative feeder 16 is 0.52 L / min, which matches the power of the ultrasonic oscillator 3. With the feeding speed and atomization speed matched, the rate at which the fragments are attached to the atomized liquid is constant and controllable, the weight of the fragments increases steadily, and then they sink evenly to the material outlet 17. If the atomization speed is less than the feeding speed, the unatomized liquid will cause the fragments to gain weight instantaneously, leading to sudden settling and detachment from the suspension zone, resulting in feeding failure. The settled fragments may also clog the equipment. If the atomization speed is greater than the feeding speed, the feeding is insufficient, and effective weight gain feeding cannot be achieved. Therefore, this application controls the feeding speed to match the atomization speed to ensure that the behavior of the fragments in the airflow field is controllable, thereby ensuring the continuous stability of the sorting and feeding processes.

[0035] Furthermore, the directional feeding unit of this application includes a fan, which is installed in the mounting box and located above the atomizing chamber 31. The fan in this application is an industrial fan 6, capable of providing stable and controllable airflow.

[0036] Furthermore, such as Figure 2 As shown, the directional feeding unit of this application also includes an annular distributor 61 disposed at the atomized liquid outlet 14. The industrial fan 6 of this application directs the airflow of the mixed atomized liquid through the annular distributor 61, and into the air classifier 1 from the atomized liquid outlet 14 at the expected angle and direction, forming the required tangential airflow field, thereby achieving uniform molecular-level adhesion of the liquid.

[0037] Furthermore, the annular distributor 61 includes multiple fan-shaped nozzles for forming tangential airflow. The diameter of the fan-shaped nozzles in this application is 1 mm, and the spacing between adjacent fan-shaped nozzles is 20 mm. The axis of the fan-shaped nozzles forms an angle of 15° to 30° with the radius of the air separator 1. The tangential airflow field formed by the annular separator in this application enables the atomized liquid to cover the surface of the fragments, ensuring that the amount of atomized liquid contacted by each fragment is basically the same, making the liquid adhesion process more uniform and controllable.

[0038] Furthermore, in practical application, the material enters the air classifier 1 through the material inlet 12, and lightweight impurities such as feathers and hemp fibers enter the impurity collection cabinet at the fan end through the impurity outlet 11. At the same time, the fragments float in the air classifier 1. The liquid in the liquid tank 2 enters the ultrasonic oscillator 3 through the quantitative feeder 16 and completes the atomization process in the atomization chamber 31 to generate 10.50μm atomized liquid. With the help of the industrial fan 6, the atomized liquid enters the low-speed feeding zone of the air classifier 1 through the annular distributor 61 with tangential airflow from the atomized liquid outlet 14. It evenly adheres to the fragments and absorbs them. After absorption, the fragments become heavier and sink, and enter the conveyor belt 4 through the material outlet 17 to be transported to the material receiving box 5 for later use. Thus, this application can achieve material addition and quality improvement while removing impurities, effectively improving the quality of fragments and processing efficiency.

[0039] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A fan impurity removal and feeding device, characterized in that, The system includes an air classifier box (1), a blower, an ultrasonic atomizing unit, and a directional feeding unit. The top of the air classifier box (1) is provided with a debris outlet (11), and the bottom is provided with a material outlet (17). The blower is connected to the debris outlet (11) through a pipe and provides airflow at different speeds to the air classifier box (1) so that a high-speed debris removal zone is formed in the upper part of the air classifier box (1) and a low-speed feeding zone is formed in the lower part. The ultrasonic atomizing unit is externally located at the bottom of the air classifier box (1) and is connected to the low-speed feeding zone through the atomized liquid outlet (14). The directional feeding unit is externally located near the atomized liquid outlet (14) at the bottom of the air classifier box (1) and is used to directionally transport the atomized liquid generated by the ultrasonic atomizing unit to the air classifier box (1) through the atomized liquid outlet (14) and adsorb it onto the suspended fragments in the low-speed feeding zone.

2. The fan impurity removal and feeding device according to claim 1, characterized in that, The ultrasonic atomizing unit includes a mounting box and an ultrasonic oscillator (3). The bottom of the mounting box is provided with an atomizing chamber (31), and the ultrasonic oscillator (3) is installed in the atomizing chamber (31).

3. The fan de-entrainment and feeding apparatus of claim 2, wherein, The directional feeding unit includes a fan, which is installed in the mounting box and located above the atomizing chamber (31).

4. The fan de-entrainment and feeding apparatus of claim 2, wherein, The ultrasonic atomizing unit also includes a liquid tank (2), which has an outlet (13) and an inlet on the mounting box. The liquid tank (2) supplies liquid to the atomizing chamber (31) through the outlet (13) and the inlet.

5. The fan de-entrainment and feeding apparatus of claim 4, wherein, A quantitative feeder (16) is provided at the discharge port (13).

6. The fan de-entrainment and feeding apparatus of claim 5, wherein, The speed of the metering feeder (16) is the same as the atomization speed of the ultrasonic oscillator (3).

7. The fan de-entrainment and feeding apparatus of claim 3, wherein, The directional feeding unit also includes an annular distributor (61) disposed at the atomized liquid outlet (14).

8. The fan impurity removal and feeding device according to claim 7, characterized in that, The annular distributor (61) includes a plurality of fan-shaped nozzles for forming tangential airflow.

9. The fan impurity removal and feeding device according to claim 1, characterized in that, An inclined guide plate is provided inside the air separator (1).

10. The fan impurity removal and feeding device according to claim 9, characterized in that, The vertical distance between the end of the inclined guide plate and the material outlet (17) is 1 / 3 of the total height of the air separator (1).

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