A cyclone separation device with secondary separation function

Abstract

The utility model discloses a cyclone separation device with secondary separation function, including device body, inner tube (1), set up in the air inlet (2) of device body, set up in the first air outlet (3) of inner tube (1) side and the discharge gate (4) of device body lower extreme, the first air outlet (3) is set up in the position of inner tube (1) away from the air inlet (2) along the air current direction, and the first air outlet (3) is set up as 1 / 10~1 / 2 of the surface area of inner tube (1). The inner tube of cyclone separation device with secondary separation function sets up side air outlet, and the air outlet mode of gas is improved, and system resistance is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of cyclone separators, specifically to a cyclone separator with a secondary separation function. Background Technology

[0002] Cyclone separators are widely used in industries such as cement, chemicals, environmental protection, and power generation, and are key equipment for achieving gas-solid separation. A conventional cyclone separator consists of an inlet, volute, inner cylinder, straight section, cone, and discharge port, and the structure of the cyclone separator largely determines its separation efficiency and resistance loss.

[0003] Currently used cyclone separators typically discharge air from the bottom of the inner cylinder. With this bottom-discharge method, the gas needs to rotate within the inner cylinder to the bottom before entering and exiting through the outlet. Therefore, the gas travels a relatively long distance within the cyclone, and the airflow suffers losses due to right-angle turns, resulting in significant resistance within the cyclone. This increased resistance raises the fan load and consequently, increases the fan's power consumption. Utility Model Content

[0004] The purpose of this invention is to provide a cyclone separator with a secondary separation function. The inner cylinder of the cyclone separator with a secondary separation function is provided with side air outlet, which improves the air outlet method and effectively reduces system resistance.

[0005] To achieve the above objectives, this utility model provides a cyclone separator with a secondary separation function, including a device body, an inner cylinder, an air inlet disposed on the device body, a first air outlet disposed on the side of the inner cylinder, and a discharge outlet located at the lower end of the device body.

[0006] The first air outlet is located on the inner cylinder away from the air inlet along the airflow direction, and the first air outlet is set to occupy 1 / 10 to 1 / 2 of the surface area of ​​the inner cylinder.

[0007] Preferably, the device body includes a volute, a straight section, and a skewed cone connected sequentially from top to bottom. The air inlet is connected to the volute, the discharge port is located at the lower end of the skewed cone, and the inner cylinder is inserted into the device body from the top of the volute. The height of the volute is set as h, and the insertion depth of the inner cylinder is set as h1, thus satisfying h1 = h.

[0008] Preferably, the inner cylinder is cone-shaped, with the upper end of the cone-shaped inner cylinder being a small end with a diameter of d1, and the lower end being a large end with a diameter of d2.

[0009] The first air outlet is set along the entire length of the inner cylinder's generatrix.

[0010] Preferably, the lower end of the conical inner cylinder is connected to a conical hopper for collecting dust.

[0011] Preferably, the lower end of the conical hopper is provided with a discharge chute connected to the conical hopper.

[0012] Preferably, the lower end of the feed chute is connected to a diffuser for isolating the tail vortex airflow from the powder.

[0013] Preferably, the device body includes a volute, and the air inlet is disposed on the volute and tangent to the volute.

[0014] Preferably, the side of the first air outlet away from the air inlet along the airflow direction is connected to the end of the volute via a flow guide baffle.

[0015] According to the above technical solution, the dust-laden gas enters the device body through the air inlet and rotates inside the device body. During the rotation, the dust is thrown to the side wall of the device body under the action of centrifugal force. After contacting the side wall, the dust loses kinetic energy. The dust that has lost kinetic energy cannot continue to rotate with the gas and will gradually slide down along the side wall of the device body and finally be discharged from the discharge port at the lower end of the device body.

[0016] During the gas rotation process, larger dust particles have greater inertia and will first collide with the side wall. As the diameter of the gas rotation section inside the device gradually decreases, the airflow speed gradually increases, and the centrifugal force also increases. More and more particles will be thrown to the side wall and collected. The first air outlet is set on the side wall of the inner cylinder 1. During the gas rotation process, these gases will pass through the first air outlet and enter the inner cylinder through the first air outlet.

[0017] During rotation, the airflow rubs against the inner wall of the cyclone separator, generating frictional resistance. The greater the airflow velocity, the greater the frictional resistance. Therefore, the longer the gas travels, the longer the frictional resistance lasts; in other words, the longer the gas travels, the greater the system's resistance to the airflow. By placing the first outlet on the side wall of the inner cylinder, the airflow does not need to rotate continuously within the cyclone separator to enter the inner cylinder from the bottom. Instead, it can directly enter the inner cylinder from the side during rotation, and it can enter the inner cylinder through the first outlet without undergoing a right-angle turn. This effectively reduces the resistance the gas experiences within the device.

[0018] Although the long travel distance of the gas within the device body leads to kinetic energy loss, this long rotation also provides ample time for solid-gas separation, ensuring effective separation of solid dust and improving separation efficiency. Preferably, the first outlet is positioned within the inner cylinder, away from the inlet along the airflow direction, allowing the gas to remain within the cyclone separator for as long as possible, maximizing the collection of solid dust and thus reducing system resistance while maintaining high solid-gas separation efficiency.

[0019] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of a cyclone separator with secondary separation function;

[0022] Figure 2 This is a schematic diagram showing the connection between a flow guide baffle and a first air outlet;

[0023] Figure 3 This is a schematic diagram of a volute.

[0024] Explanation of reference numerals in the attached figures

[0025] 1 Inner cylinder 2 Air inlets

[0026] 3 First air outlet 4 Material outlet

[0027] 51. Volute; 52. Straight Section

[0028] 53 crooked cone 11 cone-shaped bin

[0029] 12 Feed chute 13 Diffuser

[0030] 14 flow deflectors Detailed Implementation

[0031] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0032] In this utility model, unless otherwise stated, directional words such as "side," "lower end," "away from," "inner," and "inserted" in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term.

[0033] like Figure 1-3 The cyclone separator with secondary separation function includes a device body, an inner cylinder 1, an air inlet 2 disposed on the device body, a first air outlet 3 disposed on the side of the inner cylinder 1, and a discharge outlet 4 located at the lower end of the device body.

[0034] The first air outlet 3 is located on the inner cylinder 1 at a position away from the air inlet 2 along the airflow direction.

[0035] Through the implementation of the above technical solution, the dust-laden gas enters the device body through the air inlet 2 and rotates inside the device body. During the rotation, the dust will be thrown to the side wall of the device body under the action of centrifugal force. After contacting the side wall, the dust loses kinetic energy. The dust that loses kinetic energy cannot continue to rotate with the gas, so it will gradually slide down along the side wall of the device body and finally be discharged from the discharge port 4 at the lower end of the device body.

[0036] During the gas rotation process, larger dust particles have greater inertia and will first collide with the side wall. As the diameter of the gas rotation section inside the device gradually decreases, the airflow speed gradually increases, and the centrifugal force also increases. More and more particles will be thrown to the side wall and collected. The first air outlet 3 is set on the side wall of the inner cylinder 1. During the gas rotation process, these gases will pass through the first air outlet 3 and enter the inner cylinder 1 through the first air outlet 3.

[0037] During rotation, the airflow rubs against the inner wall of the cyclone separator, generating frictional resistance. The greater the airflow velocity, the greater the frictional resistance. Therefore, the longer the gas travels, the longer the frictional resistance lasts; that is, the longer the gas travels, the greater the system's resistance to the airflow. By placing the first outlet 3 on the side wall of the inner cylinder 1, the airflow does not need to rotate continuously within the cyclone separator to enter the inner cylinder 1 from below. Instead, it can directly enter the inner cylinder 1 from the side during rotation, without needing to make a right-angle turn, thus effectively reducing the resistance the gas experiences within the device.

[0038] Although the long travel distance of the gas within the device body leads to kinetic energy loss, this long rotation also provides ample time for solid-gas separation, ensuring effective separation of solid dust and improving separation efficiency. Preferably, the first outlet 3 is positioned within the inner cylinder 1, away from the inlet 2 along the airflow direction. This allows the gas to remain within the cyclone separator for as long as possible, maximizing the collection of solid dust and thus reducing system resistance while maintaining efficient solid-gas separation.

[0039] The first air outlet 3 is set to occupy 1 / 10 to 1 / 2 of the surface area of ​​the inner cylinder 1.

[0040] The size of the first air outlet 3 and the insertion depth h1 of the inner cylinder 1 are matched to control the separation efficiency of the cyclone separator. When the opening of the first air outlet 3 is set to be large, the gas can quickly enter the inner cylinder 1 through the first air outlet 3 during rotation. At the same time, as the insertion depth of the inner cylinder 1 increases, the remaining gas will become less and less. Therefore, the insertion depth h1 of the inner cylinder 1 does not need to be set very large to exhaust all the gas in the device body. Therefore, when the first air outlet 3 is set to be large and the insertion depth of the inner cylinder 1 is small, the system resistance is small, but the solid-gas separation efficiency is low. When the opening of the first air outlet 3 is set to be small, the gas is not easy to enter the first air outlet 3 during rotation. Therefore, the gas needs to travel a longer distance in the device body. Accordingly, the insertion depth of the inner cylinder 1 needs to be larger so that the gas in the device body can rotate around the inner cylinder 1 for a longer distance. Therefore, when the first air outlet 3 is set to be small and the insertion depth of the inner cylinder 1 is large, the system resistance is large, but the solid-gas separation efficiency is high.

[0041] Preferably, based on practical experience, when the first air outlet 3 is set to occupy 1 / 10 of the surface area of ​​the inner cylinder 1, the cyclone separator can obtain the best solid-gas separation efficiency. When the first outlet is less than 1 / 10 of the surface area of ​​the inner cylinder 1, the gas travels longer in the cyclone separator, the system resistance increases, and the gas may even enter the lower part of the cyclone separator, causing the flow field inside the cyclone separator to be unstable.

[0042] When the first air outlet 3 is set to occupy 1 / 2 of the surface area of ​​the inner cylinder 1, the gas can move to the inner cylinder 1 completely in the volute 51. When the first air outlet 3 is larger than 1 / 2 of the surface area of ​​the inner cylinder 1, the gas in the volute 51 can enter the first air outlet 3 almost immediately, and the separation efficiency of the cyclone separator is extremely low.

[0043] Therefore, in actual production, the size of the first air outlet 3 can be selected as needed. The first air outlet 3 is set to occupy 1 / 10 to 1 / 2 of the surface area of ​​the inner cylinder 1.

[0044] In this embodiment, preferably, the device body includes a volute 51, a straight section 52, and a skewed cone 53 connected sequentially from top to bottom. The air inlet 2 is connected to the volute 51, and the discharge port 4 is located at the lower end of the skewed cone 53. The inner cylinder 1 is inserted into the device body from the top of the volute 51. The height of the volute 51 is set to h, and the insertion depth of the inner cylinder 1 is set to h1, which satisfies h1 = (0.3~1)h.

[0045] The greater the insertion depth of the inner cylinder 1, the longer the gas travels within the device body, and the greater the kinetic energy loss of the gas. Therefore, from the perspective of reducing system resistance, the insertion depth of the inner cylinder 1 should be set as small as possible. Preferably, the insertion depth of the inner cylinder 1 is set to be no greater than the height of the volute 51, which can minimize system resistance to the greatest extent.

[0046] During the gas rotation process, solid particles are continuously thrown against the inner wall of the volute 51. After the solid particles collide with the inner wall of the volute 51, they lose kinetic energy and are collected. Therefore, increasing the residence time of the gas in the device body can significantly improve the separation efficiency of the cyclone separator.

[0047] The gas's travel distance within the device body affects its residence time within the cyclone separator. A longer travel distance results in a longer residence time. Therefore, the insertion depth of the inner cylinder 1 affects the solid-gas separation efficiency of the cyclone separator; a greater insertion depth results in higher solid-gas separation efficiency. Since the first outlet 3 is located on the side of the inner cylinder 1, the gas does not need to rotate to the bottom of the inner cylinder 1. Instead, gas continuously enters the inner cylinder 1 through the first outlet 3 during rotation. Therefore, as the insertion depth of the inner cylinder 1 increases, the remaining rotating gas gradually decreases. Thus, a greater insertion depth of the inner cylinder 1 does not necessarily mean higher separation efficiency for the cyclone separator. Preferably, the maximum insertion depth h1 of the inner cylinder 1 is set to 1h. At this depth, almost all the gas in the cyclone separator is captured by the first outlet 3, and the system resistance does not increase significantly.

[0048] Therefore, preferably, when the insertion depth of the inner cylinder 1 is set to h1 = (0.3~1)h, a better solid-gas separation effect can be obtained without significantly increasing the system resistance.

[0049] In this manner, preferably, the inner cylinder 1 is set as a cone shape, the upper end of the cone inner cylinder 1 is set as a small end with a diameter of d1, and the lower end is set as a large end with a diameter of d2;

[0050] The first air outlet 3 is set along the entire length of the inner cylinder 1.

[0051] After the dust-laden gas enters the cyclone separator, it begins to rotate under the action of the volute 51. As the gas enters the volute 51, its velocity increases, and its direction changes continuously. Due to the greater inertia of solid particles, some larger solid particles are thrown against the inner wall of the volute 51 during the acceleration and reversal process. These particles lose kinetic energy upon collision and cannot continue rotating with the gas, instead sliding down the inner wall of the device. This is the first solid-gas separation process of the cyclone separator. In this separation, larger particles are separated first, while some smaller particles continue to rotate with the gas and enter the inner cylinder 1 through the first outlet 3.

[0052] Since the inner cylinder 1 is designed as a cone shape with a smaller top and a larger bottom, as the gas rotates inside the volute 51, the cross-sectional area of ​​the volute 51 near the bottom of the inner cylinder 1 will gradually decrease, and the gas velocity will gradually increase. Therefore, during the gas rotation process, the solid particles in the gas will be continuously pushed towards the inner wall of the volute 51 by the gas, so that more solid particles are collected in the first solid-gas separation process, thereby effectively improving the separation efficiency of the cyclone separator.

[0053] After entering the inner cylinder 1, the mixed gas continues to rotate along the side wall of the inner cylinder 1 and gradually rises until it enters the second air outlet at the top of the inner cylinder 1 and is discharged from the second air outlet. As the mixed gas rotates and rises within the inner cylinder 1, the cross-sectional area of ​​the inner cylinder 1 gradually decreases, thus the velocity of the mixed gas gradually increases. However, due to the large inertia of the dust particles, they cannot move in sync with the gas. Therefore, the dust particles in the mixed gas continuously collide with the inner wall of the inner cylinder 1 during their upward motion, losing kinetic energy and sliding down the inner wall of the inner cylinder 1. The velocity of the gas entering the inner cylinder 1 also increases, and because the inner cylinder 1 is conical, the gas velocity gradually increases. During the upward movement of the dust particles, due to their large inertia, they cannot move in sync with the gas. Therefore, the solid particles collide with the cylinder wall of the inner cylinder 1 during their ascent and are eventually collected due to kinetic energy loss. This is the second solid-gas separation process of this cyclone separator with secondary separation function. During the second solid-gas separation process, as the gas moves upward, the cross-sectional area of ​​the inner cylinder 1 increases continuously, and the gas velocity inside the inner cylinder 1 gradually increases. Similarly, as the gas flow rate increases, more solid particles are pushed to the side wall of the inner cylinder 1 and collide with it, thus allowing more solid particles to be collected.

[0054] When the inner cylinder 1 is designed as a cone shape with a smaller top and a larger bottom, since the first air outlet 3 is set along the generatrix of the inner cylinder 1, it will also have a shape that is smaller at the top and larger at the bottom. Therefore, the gas near the upper part of the inner cylinder 1 travels a shorter distance within the cyclone separator, resulting in insufficient solid-gas separation. Consequently, the opening of the first air outlet 3 at this location is smaller, making it difficult for the gas to enter. Conversely, the gas near the lower part of the inner cylinder 1 travels a longer distance within the cyclone separator, and solid-gas separation has been underway for some time. Therefore, the opening of the first air outlet 3 at this location is larger, allowing the gas to enter the inner cylinder 1 more easily. Thus, gas with insufficient solid-gas separation is more difficult to enter the inner cylinder 1 through the first air outlet 3 than gas with sufficient solid-gas separation. Therefore, the shape of the first air outlet 3 (smaller at the top and larger at the bottom) effectively improves the efficiency of the first solid-gas separation.

[0055] Therefore, setting the inner cylinder 1 to be a cone shape with a smaller top and a larger bottom can achieve two solid-gas separations of the mixed gas. Moreover, setting the inner cylinder 1 to be conical means that the gas velocity will gradually increase during the two solid-gas separation processes, thereby ensuring the separation effect of the two solid-gas separations. Therefore, setting the inner cylinder 1 to be conical is very beneficial to improving the separation efficiency of the cyclone separator.

[0056] In this manner, preferably, the lower end of the conical inner cylinder 1 is connected to a conical bin 11 for collecting dust.

[0057] The conical inner cylinder 1 enables a second solid-gas separation of the mixed gas. Therefore, the conical chamber 11 at the lower end of the inner cylinder 1 can collect the solid particles obtained from the second solid-gas separation. This avoids these particles from entering the cyclone separator and affecting the gas flow within the cyclone separator, while also ensuring the reliable maintenance of the solid-gas separation results.

[0058] Preferably, the height of the conical chamber 11 is set to h2, then h2 = (0.1-0.8)h1.

[0059] In this embodiment, preferably, the lower end of the conical bin 11 is provided with a discharge chute 12 that communicates with the conical bin 11.

[0060] The solid particles in the conical bin 11 can be promptly conveyed out through the feed chute 12, preventing their accumulation. When the solid particles in the conical bin 11 accumulate to a certain height, the rotating airflow inside the inner cylinder 1 will blow these solid particles up, creating dust, which will affect the effectiveness of the second solid-gas separation inside the inner cylinder 1.

[0061] Preferably, the diameter of the feed chute 12 is set to d3, then d3 = (0.1-0.5)d1. By setting d3 = (0.1-0.5)d1, the powder in the conical hopper 11 can be delivered to the skewed cone 53 in a timely manner.

[0062] In this embodiment, preferably, the lower end of the feed chute 12 is connected to a diffuser 13 for isolating the tail vortex airflow from the powder.

[0063] Solid particles collected in the conical bin 11 can be transported to the hopper of the skewed cone 53 through the feed chute 12. Powder flowing down the inner wall of the device body is also collected in the hopper of the skewed cone 53. By setting the diffuser 13, the tail vortex airflow above the skewed cone 53 can be physically isolated from the powder, which can effectively prevent dust caused by the tail vortex airflow blowing the powder.

[0064] In this preferred embodiment, the device body includes a volute 51, and an air inlet 2 is disposed on the volute 51 and tangent to the volute 51.

[0065] The air inlet 2 is set to be tangent to the volute 51, so that the mixed gas can move along the inner wall of the volute 51 after entering the volute 51 and start to rotate under the guidance of the volute 51. This can reduce the resistance caused by the sudden rotation of the gas, thereby reducing the system's resistance to the gas. The solid particles collide with the side wall of the volute 51 during the rotation and flow into the lower skew cone 53 along the inner wall.

[0066] In this configuration, preferably, the side of the first air outlet 3 away from the air inlet 2 along the airflow direction is connected to the end of the volute 51 via a guide baffle 14.

[0067] A flow guide baffle 14 is provided at the front end of the first air outlet 3 on the side of the inner cylinder 1 and at the end of the volute 51 to guide the flow and enhance the separation efficiency of fine dust.

[0068] The flow guide baffle 14 can guide the flow of the mixed gas. The mixed gas moves along the flow guide baffle 14 and gradually enters the inner cylinder 1, and then begins to rotate along the inner wall of the inner cylinder 1.

[0069] Preferably, the flow guide baffle 14 is configured as an arc shape. As the gas gradually approaches the first outlet along the flow guide baffle 14, the direction of gas movement changes continuously, and the gas velocity increases continuously. Driven by inertia and high-speed gas, solid particles in the mixed gas will continuously collide with the flow guide baffle 14. These solid particles lose kinetic energy after impact and slide downward along the flow guide baffle 14, eventually falling into the skewed cone 53 and being collected. Therefore, setting the flow guide baffle 14 can achieve the separation effect of fine dust.

[0070] In this manner, preferably, the end of the flow guide baffle 14 connected to the inner cylinder 1 is tangent to the inner cylinder 1.

[0071] The end of the flow guide baffle 14 connected to the inner cylinder 1 is tangent to the inner cylinder 1, so that after the mixed gas enters the inner cylinder 1, it can first move along the side wall of the inner cylinder 1, thereby minimizing the resistance of the inner cylinder 1 to the gas. Then, during the rising process of the mixed gas, the solid particles in the mixed gas collide with the inner wall of the inner cylinder 1 and fall into the cone-shaped chamber 11 below along the inner wall of the inner cylinder 1.

[0072] A method of using a cyclone separator with secondary separation function includes:

[0073] Step 1: Introduce the dust-laden gas into air inlet 2;

[0074] Step 2: The dust-laden gas rotates around the volute 51 for a single separation. The separated dust falls into the skewed cone 53, and the separated gas enters the inner cylinder 1 through the first air outlet 3.

[0075] Step 3: The dust-laden gas rotates in the inner cylinder 1 for secondary separation. The separated dust falls into the conical chamber 11, and the separated gas is discharged from the second air outlet of the inner cylinder 1.

[0076] Step 4: The dust in the conical bin 11 falls into the skewed cone 53 through the discharge chute 12, and the dust in the skewed cone 53 is discharged through the discharge port 4.

[0077] Through the implementation of the above technical solution, the dust-laden mixed gas enters the volute 51 through the air inlet 2 and begins to rotate under the guidance of the inner wall of the volute 51. During the rotation, the speed of the mixed gas gradually increases. Therefore, the larger solid particles in the mixed gas will collide with the inner wall of the volute 51 under the action of the gas and their own inertia. After the collision, these larger solid particles cannot continue to rotate at high speed with the gas due to the loss of kinetic energy, and will slide down along the inner wall of the device body and finally be collected in the skewed cone 53. This is the first solid-gas separation of the cyclone separator.

[0078] After the first solid-gas separation, the mixed gas still contains some smaller solid particles. These particles enter the inner cylinder 1 through the first outlet 3, continue to rotate inside the inner cylinder 1, and are eventually discharged through the second outlet at the top of the inner cylinder 1. As the mixed gas rises, its velocity gradually increases. This increased velocity pushes the solid particles towards the side wall of the inner cylinder 1. Therefore, as the mixed gas rises, solid particles continuously impact the side wall of the inner cylinder 1. These impacting particles slide down the side wall of the inner cylinder 1 and enter the lower conical chamber 11. This is the second solid-gas separation in the cyclone separator. The separated solid particles fall into the conical chamber 11 and enter the inclined cone 53 through the feed chute 12, and are discharged together with the solid particles from the first solid-gas separation through the discharge port 4. The gas from the second solid-gas separation is discharged through the second outlet at the top of the inner cylinder 1.

[0079] In this method, preferably, in step three, the velocity of the dust-laden gas increases after entering the inner cylinder 1. In step three, the inner cylinder 1 needs to utilize the inertia of the solid particles to cause them to collide with the side wall of the inner cylinder 1, thereby achieving the effect of collecting the solid particles. By increasing the velocity of the dust-laden gas after entering the inner cylinder 1, the gas in the inner cylinder 1 can continuously push the solid particles to collide with the side wall of the inner cylinder 1 during rotation, thereby achieving a better solid-gas separation effect.

[0080] Preferably, the diameter of the straight section 52 is D, and the large end diameter d2 is set to be no greater than 0.7D, so that the cross-sectional area outside the inner cylinder 1 is greater than the cross-sectional area inside the inner cylinder 1. Then the gas velocity will increase after entering the inner cylinder 1. The smaller the large end diameter d2 of the inner cylinder 1, the more obvious the increase in gas velocity after entering the inner cylinder 1.

[0081] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0082] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0083] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A cyclone separation device having a secondary separation function, characterized by comprising: It includes a device body, an inner cylinder (1), an air inlet (2) provided on the device body, a first air outlet (3) provided on the side of the inner cylinder (1) and a discharge outlet (4) located at the lower end of the device body. The first air outlet (3) is located on the inner cylinder (1) away from the air inlet (2) along the airflow direction, and the first air outlet (3) is set to occupy 1 / 10 to 1 / 2 of the surface area of ​​the inner cylinder (1).

2. The cyclone separator with secondary separation function according to claim 1, characterized in that, The device body includes a volute (51), a straight section (52) and a skewed cone (53) connected from top to bottom. The air inlet (2) is connected to the volute (51), and the discharge port (4) is located at the lower end of the skewed cone (53). The inner cylinder (1) is inserted into the device body from the top of the volute (51). The height of the volute (51) is set to h, and the insertion depth of the inner cylinder (1) is set to h1, which satisfies h1 = (0.3~1.5)h.

3. The cyclone separator with secondary separation function according to claim 1, characterized in that, The inner cylinder (1) is set to be conical. The upper end of the conical inner cylinder (1) is set to be the small end with a diameter of d1, and the lower end is set to be the large end with a diameter of d2. The first air outlet (3) is set along the entire length of the inner cylinder (1) in the direction of the busbar.

4. The cyclone separator with secondary separation function according to claim 3, characterized in that, The lower end of the conical inner cylinder (1) is connected to a conical bin (11) for collecting dust.

5. The cyclone separator with secondary separation function according to claim 4, characterized in that, The lower end of the conical bin (11) is provided with a discharge chute (12) that is connected to the conical bin (11).

6. The cyclone separator with secondary separation function according to claim 5, characterized in that, The lower end of the feed chute (12) is connected to a diffuser (13) for isolating the tail vortex airflow from the powder.

7. The cyclone separator with secondary separation function according to claim 1, characterized in that, The device body includes a volute (51) and an air inlet (2) is disposed on the volute (51) and is tangent to the volute (51).

8. The cyclone separator with secondary separation function according to claim 2, characterized in that, The first air outlet (3) is connected to the end of the volute (51) via a flow guide baffle (14) on the side away from the air inlet (2) along the airflow direction.

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