Cyclone dust removal device

Abstract

The present application discloses a cyclone dust removal device, which relates to the technical field of dust removal. The cyclone dust removal device includes a first cylinder body, a second cylinder body, an overflow pipe, multiple layers of spiral blades, a dust outlet and a cloth bag structure; an air inlet pipe is arranged at the upper end of the first cylinder body along its tangential direction; the second cylinder body is embedded in the first cylinder body and communicates with the air inlet pipe, and a first annular channel is formed between the second cylinder body and the first cylinder body; the overflow pipe is embedded in the second cylinder body and extends outside the first cylinder body, and a second annular channel is formed between the overflow pipe and the second cylinder body; the multiple layers of spiral blades are arranged in the second annular channel and sleeved on the overflow pipe; the dust outlet is arranged at the upper end of the second cylinder body, and the second annular channel is communicated with the first annular channel through the dust outlet; the cloth bag structure is connected to the lower end of the overflow pipe. The cyclone dust removal device can efficiently eliminate the top ash ring and can perform secondary dust removal to improve the dust removal effect.

Description

Technical Field

[0001] This application relates to the technical field of dust removal equipment, and more particularly, to a cyclone dust removal device. Background Art

[0002] The cyclone separator has a simple structure, low manufacturing and maintenance costs, and stable operation. It is widely used in industrial dust removal, but the particle removal efficiency is relatively low, especially for small particles. Due to the action of the longitudinal circulation formed in the upper annular space, a top ash ring will be formed during the dust removal operation of the cyclone separator. The particle concentration in the top ash ring area is relatively high. The particles are not centrifugally separated and will escape from the lower end of the overflow pipe, affecting the gas-solid separation efficiency. Summary of the Invention

[0003] The cyclone dust removal device provided by this application can efficiently eliminate the top ash ring and improve the dust removal effect.

[0004] This application provides a cyclone dust removal device, which includes a first cylinder, a second cylinder, an overflow pipe, multiple layers of spiral blades, and a dust outlet; an air inlet pipe is arranged at the upper end of the first cylinder along its tangential direction; the second cylinder is embedded in the first cylinder and communicates with the air inlet pipe, and a first annular channel is formed between the second cylinder and the first cylinder; the overflow pipe is embedded in the second cylinder and extends outside the first cylinder, and a second annular channel is formed between the overflow pipe and the second cylinder; multiple layers of spiral blades are arranged in the second annular channel and sleeved on the overflow pipe; the dust outlet is arranged at the upper end of the second cylinder, and the second annular channel communicates with the first annular channel through the dust outlet.

[0005] According to the above technical solution, due to the action of the multiple layers of spiral blades, the dust-containing gas in the secondary flow area (i.e., the longitudinal circulation area) in the second annular channel will rotate secondarily, generating a radial centrifugal force, so that the dust particles are separated from the airflow under the action of the centrifugal force and are thrown onto the inner wall of the second cylinder, and finally discharged from the lower end of the second cylinder due to the action of gravity. On the other hand, the smaller particles have a smaller gravity. After being thrown onto the inner wall of the second cylinder under the action of the centrifugal force, they enter the longitudinal circulation area and are discharged into the first annular channel through the dust outlet due to inertia, and finally discharged from the lower end of the first annular channel. The cyclone dust removal device can effectively prevent the formation of the top ash ring.

[0006] In the first possible implementation manner of this application, the cyclone dust removal device further includes a cloth bag structure, and the cloth bag structure is connected to the lower end of the overflow pipe; the gas in the second annular channel enters the overflow pipe through the cloth bag structure for secondary dust filtration.

[0007] In the above technical solution, the cloth bag structure is in the inner swirl region, which can filter out small particle-size particles in the second annular channel and the particles entrained by the secondary flow, thereby performing secondary dust removal, with a higher separation dust removal efficiency, making the gas discharged from the overflow pipe cleaner. And due to the action of the multi-layer spiral blades, large particle-size particles are prevented from hitting the cloth bag structure, reducing the wear of the cloth bag structure and extending the service life of the cloth bag structure.

[0008] Combined with the first possible implementation manner of the present application, in the second possible implementation manner of the present application, the cloth bag structure includes a filter bag frame and a dust removal filter bag; the filter bag frame is connected to the lower end of the overflow pipe, and the dust removal filter bag is sleeved on the filter bag frame; the dust removal filter bag is in the shape of a cylinder with a gradually decreasing cross-sectional diameter from the upper part to the lower part, the cross-sectional diameter of the dust removal filter bag is less than or equal to the cross-sectional diameter of the overflow pipe, and the lower port of the dust removal filter bag is sealed.

[0009] In the above technical solution, the filter bag frame is connected to the lower end of the overflow pipe, and the dust removal filter bag is sleeved on the filter bag frame. Only by replacing the dust removal filter bag can the installation of the cloth bag structure be completed, which is convenient for disassembly and maintenance.

[0010] In the third possible implementation manner of the present application, the horizontal height of the lower end of the overflow pipe is lower than the horizontal height of the air inlet pipe, and the horizontal height of the dust outlet is higher than the horizontal height of the air inlet pipe.

[0011] In the above technical solution, the horizontal heights of the dust outlet, the air inlet pipe, and the lower end of the overflow pipe decrease in sequence, thereby ensuring that the cyclone dust removal device can effectively remove dust from the gas entering the second annular channel from the air inlet pipe.

[0012] In the fourth possible implementation manner of the present application, the outer edge end of the multi-layer spiral blades at least extends into the secondary flow region formed in the second annular channel.

[0013] In the above technical solution, the outer edge end of the multi-layer spiral blades at least extends into the secondary flow region, thereby ensuring that the dust-containing gas entering the second annular channel accelerates rotation after flowing through the multi-layer spiral blades, and ensuring that the cyclone dust removal device performs dust removal on the dust-containing gas in the secondary flow region.

[0014] In the fifth possible implementation manner of the present application, the end spiral inclination angle of the multi-layer spiral blades is 8° - 15°.

[0015] In the above technical solution, the end spiral inclination angle of the multi-layer spiral blades can be set to 8° - 15° according to actual needs, which is convenient for targeted dust removal.

[0016] In combination with the first possible implementation manner of the present application, in the sixth possible implementation manner of the present application, a first dust discharge port communicating with the first annular channel is formed at the lower end of the first cylinder body, a second dust discharge port communicating with the second annular channel is formed at the lower end of the second cylinder body, and the cloth bag structure extends into the second dust discharge port.

[0017] In the above technical solution, a first dust discharge port is provided at the lower end of the first cylinder body for discharging the dust particles in the first annular channel. A second dust discharge port is provided at the lower end of the second cylinder body, and the cloth bag structure extends into the second dust discharge port, so that the dust particles sliding down from the inner wall of the second cylinder body are discharged from the second dust discharge port, and the residual particles in the second annular channel can be prevented from escaping into the overflow pipe through the lower end of the cloth bag structure.

[0018] In combination with the sixth possible implementation manner of the present application, in the seventh possible implementation manner of the present application, the cyclone dust removal device further includes a dust storage hopper, and the dust storage hopper is connected to the lower end of the first cylinder body and communicates with the first dust discharge port and the second dust discharge port at the same time.

[0019] In the above technical solution, the dust storage hopper is installed at the lower end of the first cylinder body and communicates with the first dust discharge port and the second dust discharge port at the same time, so as to collect the large and small particles accumulated after the dust removal action of the cyclone dust removal device, which is convenient for cleaning.

[0020] In the eighth possible implementation manner of the present application, the second cylinder body includes a straight cylinder part at the upper end and a conical part at the lower end, and the straight cylinder part is connected to the conical part.

[0021] In the above technical solution, the second cylinder body includes a straight cylinder part and a conical part, so as to form a cyclone air flow, which is convenient for gas-solid separation.

[0022] In the ninth possible implementation manner of the present application, the dust outlet is a louver-shaped opening or a strip-shaped hole.

[0023] In the above technical solution, the dust outlet is designed with a louver-shaped opening, and the air flow angle can be adjusted by changing the angle of the blades, so as to facilitate the smooth discharge of the particles with smaller particle sizes into the first annular channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic diagram of the formation mechanism of the top ash ring;

[0026] Figure 2 This is a schematic structural diagram of a cyclone dust removal device in an alternative embodiment of the present application;

[0027] Figure 3 This is a schematic internal structure diagram of a cyclone dust removal device in an alternative embodiment of the present application.

[0028] Reference numerals: 10 - cyclone dust removal device; 12 - top ash ring; 14 - first annular channel; 16 - second annular channel; 18 - secondary flow; 100 - first cylinder; 102 - first dust discharge port; 110 - air inlet pipe; 200 - second cylinder; 202 - second dust discharge port; 210 - straight cylinder part; 220 - conical part; 300 - overflow pipe; 400 - spiral blade; 500 - dust outlet; 600 - cloth bag structure; 700 - ash storage hopper. Detailed implementation manners

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0031] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "below", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is normally placed. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present application. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present application, it should also be noted that unless otherwise clearly defined and limited, the terms "arrangement" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] In the present application, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being above, over and on the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, under and beneath the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0035] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0036] Please refer to Figure 1 as shown in Figure 1 which shows the formation mechanism of the top ash ring 12 in a common cyclone separator. When the dusty gas enters the annular space of the cyclone separator, most of the particles will rotate with the airflow and move towards the wall under the action of centrifugal force, then flow downward along the wall, and then flow through the cylindrical space and the conical space to reach the lower part and be separated. In the annular space, a part of the particles rotate upward under the action of the secondary flow 18 (i.e., the longitudinal circulation). During the rotation of these particles, they are subjected to a centripetal drag force in the radial direction and a centrifugal force, and in the vertical direction, they are subjected to a downward gravity and an upward drag force generated by the upward axial velocity of the secondary flow 18. When the force balance is reached, the particles will suspend on the outer side of the annular space to form a rotating top ash ring 12.

[0037] The particle concentration in the area of the top ash ring 12 is relatively high. The particles are not centrifugally separated and escape from the lower end of the overflow pipe ( Figure 1 not marked in the figure), which affects the gas-solid separation efficiency.

[0038] An embodiment of the present application provides a cyclone dust removal device 10. Through the action of the multi-layer spiral blades 400, the centrifugal force of the dust-containing gas in the secondary flow 18 region in the second annular channel 16 can be increased, so that the particulate matter with a larger particle size can be separated from the airflow under the action of the centrifugal force and be thrown onto the inner wall of the second cylinder 200, and finally discharged from the lower end of the second cylinder 200 due to the action of gravity. On the other hand, due to the small gravity of the particulate matter with a smaller particle size, after being thrown onto the inner wall of the second cylinder 200 under the action of the increased centrifugal force, it is discharged into the first annular channel 14 through the dust outlet 500 and finally discharged from the lower end of the first annular channel 14. The cyclone dust removal device 10 can effectively prevent the formation of the top ash ring 12.

[0039] Please refer to Figure 2 and Figure 3 as shown in Figure 2 which shows the specific structure of the cyclone dust removal device 10 provided by an optional embodiment of the present application, Figure 3 and shows the internal structure of the cyclone dust removal device 10 provided by an optional embodiment of the present application.

[0040] The cyclone dust removal device 10 includes a first cylinder 100, a second cylinder 200, a dust outlet 500, an overflow pipe 300, multi-layer spiral blades 400, a cloth bag structure 600, and a dust storage hopper 700.

[0041] The first cylinder 100 includes a straight cylinder section and a cone section. An air inlet pipe 110 is provided at the upper end of the straight cylinder section, and the air inlet pipe 110 is arranged along the tangent direction of the straight cylinder section. The cyclone dust removal device 10 inputs the gas to be dust-removed through the air inlet pipe 110. A small section of round pipe is connected to the lower end of the first cylinder 100 as the first dust discharge port 102.

[0042] It should be noted that the embodiments of the present application do not limit the specific size of the first cylinder 100, nor the specific shape of the first cylinder 100. In some other optional embodiments, the first cylinder 100 can also be arranged in an overall cylindrical shape. Similarly, a small section of cone pipe or cylindrical pipe can also be connected to the lower end of the first cylinder 100 as the first dust discharge port 102.

[0043] The second cylinder 200 includes a straight cylinder part 210 at the upper end and a cone part 220 at the lower end. The straight cylinder part 210 is connected to the cone part 220 to form an overall framework similar to a cyclone separator, so that the gas can form a cyclone airflow in the second cylinder 200. The second cylinder 200 is embedded in the first cylinder 100 and forms a first annular channel 14 with the first cylinder 100, and the first annular channel 14 is communicated with the first dust discharge port 102. A small section of round pipe is connected to the lower end of the cone part 220 as the second dust discharge port 202.

[0044] It should be noted that the specific dimensions of the second cylinder 200 are not limited in the embodiments of the present application. The dimensions of the second cylinder 200 only need to meet the requirement that it can be embedded in the first cylinder 100 and can enclose the first annular channel 14. Similarly, a small section of tapered pipe or cylindrical pipe can be connected to the lower end of the second cylinder 200 as the second dust discharge port 202.

[0045] The intake pipe 110 is arranged at a position close to the top of the first cylinder 100. After the intake pipe 110 extends into the first annular channel 14, it is fixed on the straight cylinder part 210, and the intake pipe 110 communicates with the straight cylinder part 210. The gas to be dust-removed is input into the second cylinder 200 through the intake pipe 110. The second cylinder 200 and the first cylinder 100 can be fixed in position through the intake pipe 110.

[0046] There is a certain gap space between the upper end of the straight cylinder part 210 of the second cylinder 200 and the first cylinder 100, and this gap space communicates with the first annular channel 14. The upper end of the second cylinder 200 is provided with a dust outlet 500. Further, the dust outlet 500 can communicate the first annular channel 14 with the second cylinder 200. The horizontal height of the dust outlet 500 is higher than the horizontal height of the intake pipe 110. In the embodiments of the present application, the dust outlet 500 is a louver-shaped opening, which adopts a double-layer blade setting. The fixed blade on the side close to the gap space is fixedly installed on the straight cylinder part 210, and the movable blade inside the second cylinder 200 is connected to a split multi-leaf air volume regulating valve arranged on the straight cylinder part 210. The angle of the movable blade is adjusted by the split multi-leaf air volume regulating valve to adjust the air flow angle. It should be noted that the specific structure of the dust outlet 500 is not limited in the embodiments of the present application. In some other alternative embodiments, the dust outlet 500 can also be a strip-shaped hole with a strip-shaped gap, or a porous plate with other shapes.

[0047] The overflow pipe 300 is embedded in the second cylinder 200 and extends outside the first cylinder 100. The overflow pipe 300 is used to discharge the clean gas after dust removal. The overflow pipe 300 is arranged at the middle position at the top of the first cylinder 100. The second cylinder 200 and the first cylinder 100 are connected and fixed in position through the overflow pipe 300. The horizontal height of the lower end of the overflow pipe 300 is lower than the horizontal height of the intake pipe 110. A second annular channel 16 is formed between the overflow pipe 300 and the straight cylinder part 210, and the second annular channel 16 communicates with the second dust discharge port 202.

[0048] The spiral blade 400 is sleeved on the outer wall of the overflow pipe 300 and is located in the second annular channel 16. The spiral blade 400 can be arranged in multiple layers along the outer wall of the overflow pipe 300. Please also refer to Figure 1As shown, a secondary flow region 18 of the cyclone separator can be formed between the overflow pipe 300 and the straight cylinder part 210. The outer edge end of the spiral blade 400 extends at least into the secondary flow region 18 formed within the second annular channel 16. In actual production, the outer diameter of the spiral blade 400 is determined by the secondary flow region 18, and the end spiral inclination angle of the spiral blade 400 is 8° - 15°. This ensures that the dust-containing gas entering the second annular channel 16 accelerates its rotation after flowing through multiple layers of spiral blades 400, facilitating targeted dust removal and ensuring that the cyclone dust removal device 10 can perform dust removal operations on the dust-containing gas within the secondary flow region 18.

[0049] The cloth bag structure 600 includes a filter bag frame and a dust removal filter bag. The filter bag frame is connected to the lower end of the overflow pipe 300 and extends into the second dust discharge port 202. The filter bag frame can extend to the upper section within a small section of the circular pipe that serves as the second dust discharge port 202, or it can extend to the middle section or the lower section within a small section of the circular pipe that serves as the second dust discharge port 202. The dust removal filter bag is sleeved on the filter bag frame. The dust removal filter bag is in the shape of a cylinder with a cross-sectional diameter gradually decreasing from the upper part to the lower part, and the cross-sectional diameter of the dust removal filter bag is less than or equal to the cross-sectional diameter of the overflow pipe 300, and the lower port of the dust removal filter bag is sealed.

[0050] The cloth bag structure 600 is in the inner swirl flow region (i.e., a cylindrical region extending along the length direction of the overflow pipe 300, with the radial dimension of this cylindrical region being the pipe diameter of the overflow pipe 300, and the gas flow direction being from the bottom of the inner swirl flow region rotating towards the top of the overflow pipe 300). It can collect small particle size particles within the second annular channel 16 and the particles entrained by the secondary flow 18, thereby performing secondary dust removal with a higher separation and dust removal efficiency, making the gas discharged from the overflow pipe 300 cleaner. During use, the installation of the cloth bag structure 600 can be completed simply by replacing the dust removal filter bag, facilitating disassembly and maintenance.

[0051] The ash storage hopper 700 is connected to the lower end of the first cylinder body 100 and is simultaneously connected to the first dust discharge port 102 and the second dust discharge port 202. The ash storage hopper 700 is used to collect the large and small particles accumulated after the dust removal operation of the cyclone dust removal device 10, facilitating cleaning.

[0052] During operation, the dust-containing gas enters the second annular channel 16 through the air inlet pipe 110. The dust-containing gas will rotate within the second annular channel 16, and while rotating, it will gradually move downward and reach the conical part 220. An upward inner swirl flow will be formed at the bottom of the conical part 220. After passing through the cloth bag structure 600, it enters the lower end port of the overflow pipe 300 and is finally discharged from the upper exhaust port of the overflow pipe 300.

[0053] During the rotation, the dust-containing gas within the secondary flow 18 region flows through the multi-layer spiral blades 400, and the centrifugal force it experiences will increase. As a result, the larger-sized particulate matters in the dust-containing gas will break away from the airflow under the action of the increased centrifugal force and be thrown onto the inner wall of the second cylinder body 200. Eventually, due to gravity, they enter the ash storage hopper 700 through the second dust discharge port 202 and are collected. For the smaller-sized particulate matters in the dust-containing gas, due to their relatively small gravity, after being thrown towards the inner wall of the second cylinder body 200 under the action of the increased centrifugal force, they are discharged into the first annular channel 14 through the dust outlet 500. The dust outlet 500 with a louver shape can adjust the airflow angle, facilitating the smooth discharge of the smaller-sized particulate matters into the first annular channel 14. Finally, they enter the ash storage hopper 700 through the first dust discharge port 102 and are collected. Through the above process, the formation of the top ash ring 12 can be eliminated with high efficiency.

[0054] The smaller-sized particulate matters in the dust-containing gas will be carried into the inner swirl flow by the airflow. During the process of entering the inner swirl flow, they will be intercepted by the cloth bag structure 600, completing secondary filtration and dust removal. Then, they also enter the ash storage hopper 700 through the second dust discharge port 202 and are collected. Moreover, due to the function of the multi-layer spiral blades 400, the impact of the larger-sized particulate matters on the dust removal filter bags in the cloth bag structure 600 is avoided, reducing the wear of the cloth bag structure 600 and enhancing the service life of the cloth bag structure 600.

[0055] The cyclone dust removal device 10 has a simple structure, a reasonable configuration, is easy to implement, and at the same time has a high dust removal efficiency. It can significantly eliminate the top ash ring 12, and at the same time has a secondary dust removal function, a long service life of the cloth bag, and almost unchanged pressure loss.

[0056] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A cyclone dust removal device, characterized in that, Comprising: A first cylinder body, an air inlet pipe is arranged at the upper end of the first cylinder body along its tangential direction; A second cylinder body, the second cylinder body is embedded in the first cylinder body and communicates with the air inlet pipe, and a first annular channel is formed between the second cylinder body and the first cylinder body; An overflow pipe, the overflow pipe is embedded in the second cylinder body and extends outside the first cylinder body, and a second annular channel is formed between the overflow pipe and the second cylinder body; Multiple layers of spiral blades arranged in the second annular channel, the multiple layers of spiral blades are sleeved on the overflow pipe; And A dust outlet, the dust outlet is arranged at the upper end of the second cylinder body, and the second annular channel communicates with the first annular channel through the dust outlet; The horizontal height of the dust outlet is higher than the horizontal height of the air inlet pipe.

2. The cyclone dust removal device according to claim 1, wherein The cyclone dust removal device further comprises: A cloth bag structure, the cloth bag structure is connected to the lower end of the overflow pipe; The gas in the second annular channel enters the overflow pipe through the cloth bag structure for secondary dust filtration.

3. The cyclone dust removal device according to claim 2, wherein: The cloth bag structure comprises a filter bag frame and a dust removal filter bag; The filter bag frame is connected to the lower end of the overflow pipe, and the dust removal filter bag is sleeved on the filter bag frame; The dust removal filter bag is in a cylindrical shape with a cross-sectional diameter gradually decreasing from the upper part to the lower part, the cross-sectional diameter of the dust removal filter bag is less than or equal to the cross-sectional diameter of the overflow pipe, and the lower port of the dust removal filter bag is sealed.

4. The cyclone dust removal device according to claim 1, wherein: The horizontal height of the lower end of the overflow pipe is lower than the horizontal height of the air inlet pipe.

5. The cyclone dust removal device according to claim 1, wherein: The outer edge end of the multiple layers of spiral blades at least extends into the secondary flow region formed in the second annular channel.

6. The cyclone dust removal device according to claim 1, wherein: The end spiral inclination angle of the multiple layers of spiral blades is 8°-15°.

7. The cyclone dust removal device according to claim 2, wherein: A first dust discharge port communicating with the first annular channel is formed at the lower end of the first cylinder body, and a second dust discharge port communicating with the second annular channel is formed at the lower end of the second cylinder body; The cloth bag structure extends into the second dust discharge port.

8. The cyclone dust removal device according to claim 7, characterized in that, The cyclone dust removal device further comprises: A dust storage hopper, the dust storage hopper is connected to the lower end of the first cylinder body and communicates with the first dust discharge port and the second dust discharge port at the same time.

9. The cyclone dust removal device according to claim 1, wherein: The second cylinder body comprises a straight cylinder part at the upper end and a conical part at the lower end, and the straight cylinder part is connected to the conical part.

10. The cyclone dust removal device according to claim 1, wherein: The dust outlet is a louver-shaped opening or a strip-shaped hole.

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