Multi-stage dust separation and sedimentation device
By using a multi-stage dust separation and settling device, which combines inertial separation through an arc-shaped air inlet channel with gravity settling through multi-stage guide plates and filter screen separation, the problem of dust removal during tobacco re-drying is solved, achieving efficient separation and low maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QILIN REDRYING FACTORY YUNNAN TOBACCO REDRYING
- Filing Date
- 2025-03-12
- Publication Date
- 2026-05-01
AI Technical Summary
Existing technologies struggle to efficiently remove tobacco dust generated during the tobacco re-drying process, especially due to low separation efficiency for fine particles, leading to environmental pollution and a heavy workload for equipment maintenance.
A multi-stage dust separation and settling device is adopted, which achieves efficient filtration of tobacco dust through inertial separation of the arc-shaped air inlet channel, gravity settling of multi-stage guide plates and screen separation, combined with multi-stage separation of the filter screen.
It improves the separation efficiency of tobacco dust, reduces environmental pollution, reduces equipment maintenance workload, and extends equipment life.
Smart Images
Figure CN224180556U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dust separation technology, specifically a multi-stage dust separation and settling device. Background Technology
[0002] During the tobacco re-drying process, the stem content analyzer is used to measure indicators such as the stem content in tobacco leaves and the leaf content in stems. It is a miniature leaf-threshing air separation system used to measure the "stem content index" of leaves produced on the threshing line. The stem content analyzer generates tobacco dust and tobacco leaf fragments during the detection process. Compared to the tobacco dust generated by the threshing and re-drying production line, the amount and concentration of tobacco dust are relatively small, and most of it is directly discharged into the atmosphere through ducts. The shredder also generates a certain amount of dust during the tobacco physical inspection process, which is also directly discharged outdoors through ducts. The direct emission of tobacco dust inevitably impacts the surrounding environment. The chemical components in particulate matter may participate in complex chemical reactions in the atmosphere, generating secondary pollutants. Tobacco dust particles settling on the ground can adversely affect ecological elements such as soil and water bodies. Furthermore, tobacco dust has a certain degree of corrosiveness; when it adheres to building surfaces, it gradually erodes building materials, causing damage to the building's appearance and shortening its lifespan.
[0003] Baghouse dust collectors offer high dust removal efficiency but have relatively complex structures. They require regular filter bag replacement or use pulse jet or beater methods to remove dust. Filter bag clogging must be addressed during operation, and explosion-proof measures are necessary. Maintenance is also relatively heavy. Cyclone dust collectors have simple structures, are easy to operate, and require less maintenance, but require a certain installation height difference. They are more suitable for collecting larger dust particles and are less effective at removing fine dust particles. Electrostatic precipitators offer high dust removal efficiency but have complex structures. Installation and commissioning require professional personnel, maintenance is also heavy, and investment and operating costs are high. Traditional settling chambers rely primarily on gravity settling, which has low efficiency in separating fine particles. Therefore, we propose a multi-stage dust separation and settling device. Utility Model Content
[0004] The purpose of this invention is to provide a multi-stage dust separation and settling device to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage dust separation and settling device, comprising a box body, an arc-shaped air inlet channel provided at the top of one side of the box body, a clean air exhaust pipe provided at the top of the box body away from the arc-shaped air inlet channel, a first guide plate fixedly connected to the top of the inner interior of the box body, a second guide plate fixedly connected to the bottom of the inner wall of the box body at one end of the clean air exhaust pipe, and dust baffles fixedly connected to the bottom of the first guide plate and the top of the second guide plate inside the box body, the inner area of the box body is divided by the second guide plate and the dust baffles to form a first settling chamber, a second settling chamber and a third settling chamber.
[0006] Preferably, the bottom of the side wall of the box is provided with a cleaning door at the position of the first settling chamber, the second settling chamber and the third settling chamber.
[0007] Preferably, a filter screen is fixedly connected inside the housing below the clean air exhaust pipe.
[0008] Preferably, both the first and second guide plates are rhomboid structures, the diameter of the guide hole in the first guide plate is 3mm, and the diameter of the guide hole in the second guide plate is 1.5mm.
[0009] Preferably, the enclosure is a fully enclosed rectangular structure made of steel.
[0010] Preferably, the outer frame of the cleaning door is made of stainless steel, and the interior of the cleaning door frame is a glass plate.
[0011] Preferably, the dust baffle is a complete sheet material.
[0012] Preferably, a cleaning door is provided at the top of the side wall of the box outside the first guide plate.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. This utility model enhances the separation of tobacco dust through three stages: the high-speed section (inertial separation) of the curved air inlet channel, the low-speed section (gravity settling) of the settling chamber, and the multi-stage guide plate (screen separation). It can remove low-concentration tobacco dust with a wide range of sizes generated by the leaf stem content measuring instrument and the tobacco pulverizer, avoiding the drawbacks of traditional methods that mainly rely on gravity settling for poor separation. It has a high separation efficiency for fine particles.
[0015] 2. This utility model facilitates the cleaning of the surface of the first guide plate by setting a cleaning door on the outside of the box surface. By setting a cleaning door at each settling chamber, it is convenient to clean the dust in each settling chamber and also to clean the second guide plate, making it more convenient and efficient to use. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0017] In the diagram: 1. Box body; 2. Arc-shaped air inlet channel; 3. First settling chamber; 4. First baffle plate; 5. Cleaning door; 6. Clean air exhaust pipe; 7. Filter screen; 8. Second baffle plate; 9. Dust baffle plate; 10. Cleaning door; 11. Second settling chamber; 12. Third settling chamber. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0019] Please see Figure 1 This utility model provides a technical solution: a multi-stage dust separation and settling device, including a box 1, an arc-shaped air inlet channel 2 is provided at the top of one side of the box 1, a clean air exhaust pipe 6 is provided at the top of the box 1 away from the arc-shaped air inlet channel 2, a first guide plate 4 is fixedly connected to the top of the inside of the box 1, a second guide plate 8 is fixedly connected to the bottom of the inner wall of the box 1 at the end of the clean air exhaust pipe 6, and dust baffles 9 are fixedly connected to the bottom of the first guide plate 4 and the top of the second guide plate 8 inside the box 1. The internal area of the box 1 is divided by the second guide plate 8 and the dust baffles 9 to form a first settling chamber 3, a second settling chamber 11 and a third settling chamber 12.
[0020] It should be noted that dust-laden gas enters through the arc-shaped air inlet channel 2. The centripetal force generated by the high-speed airflow in the arc-shaped air inlet channel 2 causes large particles to be quickly separated on the outer wall of the elbow, reducing the load on the subsequent settling chamber. Inside the housing 1, the first settling chamber 3, the second settling chamber 11, and the third settling chamber 12 are formed by the separation of the first guide plate 4 and its bottom dust baffle 9, the second guide plate 8 and its top dust baffle 9. Inside the housing 1, the first guide plate 4 and its bottom dust baffle 9, the second guide plate 8 and its top dust baffle 9 form an S-shaped channel area, allowing the gas to be filtered step by step as it passes through. Multiple guide plates can be set inside the housing 1, with the mesh size of the guide plates decreasing at each stage. Multiple sets can form multiple settling chambers, achieving the purpose of multi-stage filtration.
[0021] Cleaning doors 10 are provided at the bottom of the side wall of the box 1, at the positions of the first settling chamber 3, the second settling chamber 11 and the third settling chamber 12.
[0022] It should be noted that the cleaning door 10 facilitates the cleaning of dust inside the first settling chamber 3, the second settling chamber 11, and the third settling chamber 12.
[0023] Inside the housing 1, below the clean air exhaust pipe 6, there is a filter screen 7 fixedly attached.
[0024] It should be noted that the pore size on the surface of filter screen 7 is smaller than the pore size of the second guide plate 8, thus achieving secondary filtration of the gas.
[0025] Both the first guide plate 4 and the second guide plate 8 are rhomboid structures. The diameter of the guide hole of the first guide plate 4 is 3mm, and the diameter of the guide hole of the second guide plate 8 is 1.5mm.
[0026] It should be noted that the arrangement of the No. 1 guide plate 4 and its bottom dust baffle 9, the No. 2 guide plate 8 and its top dust baffle 9, allows the gas entering the chamber 1 to pass through the No. 1 guide plate 4 and the No. 2 guide plate 8, and the gas travels along the S-shaped channel to achieve a multi-stage filtration effect.
[0027] Box 1 is a fully enclosed rectangular structure made of steel.
[0028] It should be noted that the steel structure of the box 1 provides greater stability and robustness, and has a longer service life.
[0029] The outer frame of the cleaning door 10 is made of stainless steel, and the interior of the frame of the cleaning door 10 is made of glass.
[0030] It should be noted that the cleaning door 10 is designed to facilitate the cleaning of dust accumulated inside the dust collection box. The outer frame of the cleaning door 10 is made of stainless steel, and the inside of the frame of the cleaning door 10 is a glass plate, which makes it easy to observe the dust accumulation in each chamber of the dust collection box and facilitates regular cleaning.
[0031] Dust shield 9 is a complete sheet material.
[0032] It should be noted that the dust baffle 9 is a complete sheet material that can block dust and airflow, allowing the airflow inside the housing 1 to travel along the S-shaped channel.
[0033] A cleaning door 5 is provided at the top of the side wall of the box 1, outside the first guide plate 4.
[0034] It should be noted that the cleaning door 5 is designed to facilitate the cleaning of dust inside the first settling chamber 3, the second settling chamber 11, and the third settling chamber 12.
[0035] This utility model mainly employs a composite separation mechanism for dust removal. The specific principle is as follows:
[0036] The separation of tobacco dust is enhanced through three stages: the high-speed section (inertial separation) of the curved air inlet channel 2, the low-speed section (gravity settling) of the settling chamber, and the multi-stage guide plate (screen separation).
[0037] Phase 1 (Inertial Separation):
[0038] The centripetal force generated by the high-speed airflow in the arc-shaped air inlet channel 2 enables large particles to separate rapidly on the outer wall of the bend, reducing the load on the subsequent settling chamber.
[0039] Second stage (gravity settling):
[0040] After passing through the arc-shaped air inlet channel 2, the dust-laden airflow enters the larger settling chamber. The space suddenly increases, the air speed suddenly decreases, the centripetal force loses its constant force, and the energy decreases sharply in an instant. The dust loses the kinetic energy to move forward and settles at the bottom of the first settling chamber 3 due to weightlessness. The air is lighter and is separated in the upper layer during the movement. It is rolled upward with the airflow and pushed towards the first guide plate 4 above.
[0041] Third stage (screen separation):
[0042] After the first settling, the dust-laden airflow passes through the No. 1 guide plate 4. Some of the dust is intercepted by the perforated screen of the No. 1 guide plate 4 and falls to the bottom of the chamber 1 or adheres to the perforated screen. The remaining dust-laden airflow passes through the No. 1 guide plate 4 and enters the second settling chamber 11. The dust in the airflow is further separated by inertia and gravity settling. Due to the staggered arrangement of the No. 1 guide plate 4 and the dust baffle 9, the airflow flows in a serpentine manner throughout the settling chamber. Most of the dust will separate from the airflow during the movement and be intercepted by the perforated screen, thereby achieving the effect of purifying the airflow.
[0043] After undergoing multiple stages of purification, the airflow is filtered again by filter 7 at the exhaust port, and the finally purified clean air is released into the atmosphere.
[0044] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.
[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-stage dust separation and settling device, characterized in that, The enclosure includes a box body (1), an arc-shaped air inlet channel (2) is provided at the top of one side of the box body (1), a clean air exhaust pipe (6) is provided at the top of the box body (1) away from the arc-shaped air inlet channel (2), a first guide plate (4) is fixedly connected to the top of the inside of the box body (1), a second guide plate (8) is fixedly connected to the bottom of the inner wall of the box body (1) at the end of the clean air exhaust pipe (6), and dust baffles (9) are fixedly connected to the bottom of the first guide plate (4) and the top of the second guide plate (8) inside the box body (1). The internal area of the box body (1) is divided by the second guide plate (8) and the dust baffles (9) to form a first settling chamber (3), a second settling chamber (11) and a third settling chamber (12).
2. The multi-stage dust separation and settling device according to claim 1, characterized in that: Cleaning doors (10) are provided at the bottom of the side wall of the box (1) at the positions of the first settling chamber (3), the second settling chamber (11) and the third settling chamber (12).
3. The multi-stage dust separation and settling device according to claim 1, characterized in that: A filter screen (7) is fixedly connected inside the housing (1) below the clean air exhaust pipe (6).
4. The multi-stage dust separation and settling device according to claim 1, characterized in that: Both the first guide plate (4) and the second guide plate (8) are rhomboid structures. The diameter of the guide hole of the first guide plate (4) is 3mm, and the diameter of the guide hole of the second guide plate (8) is 1.5mm.
5. The multi-stage dust separation and settling device according to claim 1, characterized in that: The box (1) is a fully enclosed rectangular structure made of steel.
6. The multi-stage dust separation and settling device according to claim 2, characterized in that: The outer frame of the cleaning door (10) is made of stainless steel, and the inside of the frame of the cleaning door (10) is a glass plate.
7. A multi-stage dust separation and settling apparatus as claimed in claim 1, wherein: The dust baffle (9) is a complete sheet material.
8. The multi-stage dust separation and settling device according to claim 1, characterized in that: A cleaning door (5) is provided at the top of the side wall of the box (1) outside the first guide plate (4).