Centrifugal separator and separation method thereof

Abstract

The centrifugal separator comprises a barrel-shaped main body, one end of the barrel-shaped main body is connected with a conical main body, an inner cavity of the barrel-shaped main body and an inner cavity of the conical main body jointly form a separation cavity, the circle, close to the edge, of the top of the inner cavity of the barrel-shaped main body is connected with a plurality of flow guide plates, and the side face of the barrel-shaped main body communicates with a main air inlet pipe; a first sub-separator opening is formed in the center of the top surface of the cylindrical main body, a plurality of second sub-separator openings are uniformly formed in the periphery of the first sub-separator opening, a second sub-separator is arranged in each second sub-separator opening in a penetrating manner, and a first sub-separator is arranged in the first sub-separator opening in a penetrating manner. The invention further discloses a centrifugal separation method. The centrifugal separation method specifically comprises the steps that S1, gas is introduced into the main gas inlet pipe; s2, gas enters the cylindrical main body to be subjected to primary solid-gas separation; and S3, the gas flows into a second sub-separator to be subjected to second-stage solid-gas separation, and then is subjected to third-stage solid-gas separation. According to the centrifugal separator, the problem that an existing separator is insufficient in particle sorting capacity is solved.

Description

Technical Field

[0001] This invention relates to the field of separator equipment technology, specifically to centrifugal separators, and further to separation methods using the aforementioned centrifugal separators. Background Technology

[0002] Polyolefin resins are important advanced new materials created by humankind. Polyethylene and polypropylene account for nearly half of global plastic production, possessing characteristics such as low cost, lightweight, durability, and insulation, and hold a crucial strategic position in the petrochemical industry chain. Polyolefins are not only essential raw materials for people's basic needs of food, clothing, housing, and transportation, but also fundamental materials for advanced manufacturing and other high-end manufacturing industries. Gas-phase olefin polymerization is one of the main methods for producing polyolefins, accounting for over 50% of my country's polyethylene production capacity. In the gas-phase polyolefin integrated production process, the circulating gas discharged from the fluidized bed reactor contains particles. Cyclone dust collectors need to be installed on the outlet pipeline to remove these internal particles and prevent clogging of heat exchangers and other downstream components.

[0003] Cyclone separators are a common type of purification equipment, widely used in industrial purification equipment due to their simple structure, stable operation, high separation efficiency, and easy maintenance. However, due to the high-pressure characteristics of gas-phase olefin polymerization, existing cyclone separators suffer from problems such as high system pressure drop, low dust removal efficiency, insufficient particle sorting capacity, easy clogging of the dust outlet pipe, poor equipment stability, and poor adaptability. Summary of the Invention

[0004] The purpose of this invention is to provide a centrifugal separator that solves the problem of insufficient particle sorting capacity of existing cyclone separators.

[0005] Another object of the present invention is to provide a separation method using the above-described centrifugal separator.

[0006] The first technical solution adopted in this invention is: a centrifugal separator, including a cylindrical body, one end of which is connected to a conical body. The inner cavity of the cylindrical body and the inner cavity of the conical body together form a separation chamber. Several guide plates are connected around the top edge of the inner cavity of the cylindrical body. A main air inlet pipe is connected to the side of the cylindrical body. A first sub-separator opening is opened at the center of the top surface of the cylindrical body. Several second sub-separator openings are evenly opened around the first sub-separator opening. A second sub-separator is inserted into each second sub-separator opening. A first sub-separator is inserted into the first sub-separator opening. A main dust discharge pipe is opened at the bottom of the conical body.

[0007] The first technical solution of this invention is further characterized by: The inner cavity of the conical body is equipped with a conical baffle. The conical body and the conical baffle have the same slope. The tip of the conical baffle is connected to a particle guide tube, which passes through the main dust discharge pipe. The inner wall of the main dust discharge pipe has two symmetrically opened sliding grooves. The length direction of the two sliding grooves is parallel to the axis of the main dust discharge pipe. The inner wall of the main dust discharge pipe also has two symmetrically opened rack grooves. A rack is fixed to the side wall of each rack groove. Two support plates are symmetrically fixed to the outer side of the particle guide tube. Each support plate is slidably connected to the corresponding sliding groove. Two motor support plates are also symmetrically fixed to the outer side of the particle guide tube. A motor is fixed to each motor support plate. The output shaft of the motor is perpendicular to the axis of the main dust discharge pipe. A gear is fixed to the output shaft of the motor. Each gear meshes with the corresponding rack.

[0008] A middle partition ring is fixed to the top of the inner cavity of the cylindrical body, and the middle partition ring is arranged around the axis of the main dust exhaust pipe; several guide plates are arranged in a ring array around the axis of the main dust exhaust pipe in the inner cavity of the cylindrical body, and each guide plate is set at 18°-60° relative to the corresponding tangent direction of the main dust exhaust pipe, and the lower end of each guide plate is directly opposite the upper end of the conical partition; the connection between the main air intake pipe and the separation chamber is located outside the area enclosed by multiple guide plates.

[0009] The second sub-separator includes a cylindrical body that passes through an opening in the second sub-separator. A second sub-intake pipe is connected to the side of the cylindrical body, and the second sub-intake pipe is set at a 0-60° angle relative to the tangent direction of the main dust exhaust pipe. A second sub-exhaust pipe is connected to the top center of the cylindrical body. The other end of the cylindrical body is connected to a conical body, and the tip of the conical body is connected to a second sub-dust exhaust pipe. The other end of the dust exhaust pipe is connected to a conical chamber, and the tip of the conical chamber is connected to a dust guide pipe, which passes through the particle guide pipe. Each second sub-separator is located inside the intermediate spacer.

[0010] The second sub-exhaust pipe includes a first column pipe, one end of which extends into the conical body of the second sub-separator and communicates with the inner cavity of the conical body of the separator. The other end of the first column pipe is connected to a second column pipe, the diameter of which is larger than that of the first column pipe, and the second column pipe is connected to the first sub-separator.

[0011] The first sub-separator includes a cylindrical body, which is inserted into an opening. A first sub-intake pipe is connected to the outer cylindrical surface of the cylindrical body. The other end of the first sub-intake pipe is connected to the cylindrical side of the second column. Both ends of the first sub-intake pipe are tangent to the cylindrical body and the second column, respectively. The other end of the cylindrical body is connected to a conical body. The tip of the conical body is connected to a first sub-dust exhaust pipe, which is inserted into the conical chamber and runs inside the dust guide pipe. A first sub-exhaust pipe is inserted at the top center of the cylindrical body.

[0012] The second technical solution adopted in this invention is a centrifugal separation method using a centrifugal separator, which specifically includes the following steps: S1: Introduce gas containing particles into the main intake pipe; S2: Gas enters the cylindrical body for primary solid-gas separation; S3: The gas after primary solid-gas separation flows into the second sub-separator for secondary solid-gas separation, and then enters the first sub-separator for tertiary solid-gas separation.

[0013] The second technical solution of the present invention is further characterized by: The specific process of S2 is as follows: Gas enters the separation chamber and rotates downwards along the inner side of multiple guide plates. The rotating gas moves from the inner cavity of the cylindrical body to the inner cavity of the conical body. When the gas is obstructed, it is deflected upwards and enters the intermediate partition ring and then multiple secondary inlet pipes. At the same time, most of the particles entrained by the gas are thrown onto the guide plates. The guide plates tilt inwards along with the rotating gas. When the gas flows to the end of each guide plate, it will form a vortex of gas at the end of the guide plate. The separated particles are carried to the back of the guide plate by the vortex of gas. The particles slide down the back of the guide plate into the guide space between the conical partition and the inner wall of the conical body, and are then discharged by the main dust discharge pipe. The remaining particles will enter the inner side of the conical partition and be discharged by the particle guide pipe.

[0014] The specific process of S3 is as follows: After the gas enters the second sub-separator through the second sub-inlet pipe, it carries a small amount of remaining particulate matter and rotates downwards along the outer side of the inner wall of the cylindrical body of the second sub-separator into the conical body of the second sub-separator. As the radius of rotation of the conical body of the second sub-separator decreases, the tangential velocity of the gas increases, and it turns axially upwards at the bottom of the conical body of the second sub-separator. It then enters the first sub-separator through the first sub-inlet pipe, which is connected to the second sub-exhaust pipe. Some particulate matter enters the conical chamber along the second sub-dust exhaust pipe and is finally discharged through the dust guide pipe. During this process, the small amount of remaining particulate matter carried by the gas is thrown onto the inner wall of the cylindrical body of the first sub-separator under centrifugal force. The gas is discharged through the first sub-exhaust pipe, and the last particulate matter is discharged through the first sub-dust exhaust pipe.

[0015] The beneficial effects of this invention are: Design of the conical baffle and guide vanes: The conical baffle is movably disposed within the conical inner cavity along the axis of the separator body, and the conical baffle is spaced apart from the inner wall of the conical body to form a flow guiding space. Multiple guide vanes are arranged in a ring array around the axis of the body within the cylindrical inner cavity, with the lower end of each guide vane directly opposite the upper end of the conical baffle.

[0016] Multi-stage separation technology: The centrifugal separation system also includes an intermediate separator, a first sub-separator, and multiple second sub-separators, which further improves separation efficiency and quality through multi-stage separation.

[0017] Preventing dust discharge blockage: The innovative conical baffle and flow guide space design allows the separated particles to be smoothly discharged through the dust discharge pipe, avoiding the clogging problems common in traditional cyclone separators and improving the stability and adaptability of the equipment.

[0018] By optimizing the design of the conical baffle and multiple guide plates, this invention significantly improves separation efficiency and adapts to a wider range of particle sizes. Optimizing the airflow path and separation chamber structure allows the centrifugal separator to maintain a low system pressure drop even under high-pressure process conditions, reducing energy consumption and improving the overall system economy. The innovative conical baffle and guide space design ensures that the separated particles can be smoothly discharged through the dust exhaust pipe, avoiding clogging and improving the stability and adaptability of the equipment. Multi-stage separation technology further improves separation efficiency and quality, enabling the equipment to handle particles of different sizes, ensuring efficient separation, and enhancing product quality and process stability. Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of the centrifugal separator of the present invention; Figure 2 This is a structural schematic diagram from a second perspective of the present invention; Figure 3 This is a partial cross-sectional view of the centrifugal separator of the present invention; Figure 4 for Figure 2 Cross-sectional view of the centrifuge along the AA direction; Figure 5 This is a cross-sectional view of the main dust discharge pipe and the particle guide pipe of the present invention; Figure 6 This is a vertical cross-sectional view of the main dust discharge pipe and the particle guide pipe of the present invention; Figure 7 for Figure 2 Cross-sectional view of the centrifuge along the BB direction; Figure 8 for Figure 5 A partial schematic diagram; Figure 9 This is a schematic diagram of the structure of the first sub-separator and the second sub-separator of the present invention.

[0020] In the diagram: 100 - Centrifugal separator; 110 - Separator body; 111 - Cylindrical body; 112 - Conical body; 101 - Separation chamber; 120 - Conical baffle; 102 - Flow guide space; 103 - Main dust discharge pipe; 130 - Flow guide plate; 104 - Main air inlet pipe; 105 - Main exhaust pipe; 140 - Intermediate partition ring; 150 - First sub-separator; 151 - First sub-air inlet pipe; 152 - ... 153 - First sub-dust exhaust pipe; 160 - Second sub-separator; 161 - Second sub-intake pipe; 162 - Second sub-exhaust pipe; 16201 - First column pipe; 16202 - Second column pipe; 163 - Second sub-dust exhaust pipe; 171 - Conical chamber; 172 - Dust guide pipe; 3 - Slide groove; 4 - Rack groove; 5 - Support plate; 6 - Motor support plate; 7 - Motor; 8 - Gear; 9 - Rack. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0022] Please refer to Figures 1-3 The present invention provides a centrifuge 100, comprising: The separator body 110 includes a cylindrical body 111 and a conical body 112. The cylindrical body 111 and the conical body 112 are connected, and the cylindrical inner cavity of the cylindrical body 111 and the conical inner cavity of the conical body 112 together form a separation chamber 101. A conical baffle 120 is movably disposed within a conical inner cavity along the axis of the separator body 110; the conical baffle 120 is spaced apart from the inner wall of the conical body 112 to jointly form a flow guiding space 102; the space inside the conical baffle 120 and the flow guiding space 102 are both connected to the main dust discharge pipe 103 of the centrifugal separator 100; And multiple guide vanes 130, which are arranged in a ring array around the axis of the main body in the cylindrical inner cavity; the lower end of each guide vane 130 is directly opposite the upper end of the conical partition 120; the connection between the main intake pipe 104 of the centrifugal separator 100 and the separation chamber 101 is located outside the area enclosed by the multiple guide vanes 130, and the connection between the main exhaust pipe 105 of the centrifugal separator 100 and the separation chamber 101 is located within the area enclosed by the multiple guide vanes 130.

[0023] In this configuration, multiple guide vanes 130 are arranged in a ring array around the axis of the main body within the cylindrical inner cavity. Each guide vane 130 extends along the axis of the main body and is angled relative to the tangent of the separation chamber 101. The conical main body 112 has an inclination that matches the conical baffle 120. This configuration improves the efficiency of separating particulate matter from the airflow.

[0024] Please refer to Figures 1-3 The working principle of the centrifuge 100 is as follows: First, the centrifugal separator 100 includes a separator body 110, a conical baffle 120, and a plurality of guide plates 130; In the configuration of the separator body 110, the separator body 110 includes a cylindrical body 111 and a conical body 112. The cylindrical body 111 and the conical body 112 are connected, and the cylindrical inner cavity of the cylindrical body 111 and the conical inner cavity of the conical body 112 together form the separation chamber 101. When configuring the main air inlet pipe 104, main exhaust pipe 105, and main dust discharge pipe 103 of the centrifugal separator 100, the main air inlet pipe 104 is connected to the outer periphery of the cylindrical body 111 and is arranged along the tangential direction of the cylindrical body 111. It is also connected to the separation chamber 101, so that the airflow enters the separation chamber from the main air inlet pipe 104. When the airflow enters the separation chamber 101, a swirling flow can be formed; the main exhaust pipe 105 and the main dust exhaust pipe 103 are respectively connected to the two ends of the separator body 110, and the main intake pipe 104 is connected to the cylindrical body 111, while the main dust exhaust pipe 103 is connected to the conical body 112. Both the main exhaust pipe 105 and the main dust exhaust pipe 103 are connected to the separation chamber 101. The difference is that the main exhaust pipe 105 is connected to the cylindrical inner cavity, while the main dust exhaust pipe 103 is connected to the conical inner cavity. After the airflow mixed with particulate matter enters the separation chamber 101, the separated particulate matter is discharged through the main dust exhaust pipe 103, while the airflow with separated particulate matter is discharged through the main exhaust pipe 105 for collection and treatment. A conical baffle 120 and multiple guide plates 130 are also provided within the separation chamber 101. The conical baffle 120 is movably positioned within the conical inner cavity along the axis of the separator body 110, allowing for adjustment based on usage and operating conditions. Furthermore, the conical baffle 120 is spaced from the inner wall of the conical body 112 to form a guide space 102. Because it is movable relative to the conical inner cavity, its interaction with the inner wall of the conical body 112... The spacing between the walls can be adjusted according to the usage requirements; it should also be noted that when configuring the conical baffle 120, the orientation of its larger port is consistent with the orientation of the conical body, and the tilt direction of the conical baffle 120 is consistent with the tilt direction of the conical body, that is, the conical body 112 has an inclination adapted to the conical baffle 120; therefore, the inner and outer sides of the conical baffle 120 are connected to the cylindrical inner cavity, and the space inside the conical baffle 120 and the flow guide space 102 are connected to the main dust discharge pipe 103 of the centrifugal separator 100; When configuring the baffles 130, they are arranged in a ring array inside the cylindrical cavity of the cylindrical body 111, with their upper ends connected to the upper end of the cylindrical cavity. Meanwhile, the lower end of each baffle 130 is directly opposite the upper end of the conical baffle 120. Based on the above arrangement of the multiple guide plates 130, the connection between the main intake pipe 104 of the centrifugal separator 100 and the separation chamber 101 is located outside the area enclosed by the multiple guide plates 130, while the connection between the main exhaust pipe 105 of the centrifugal separator 100 and the separation chamber 101 is located within the area enclosed by the multiple guide plates 130. In summary, please refer to the following: Figures 1-4 Based on the above-mentioned structural configuration of the centrifuge 100, during its operation, taking the introduced airflow as polyethylene circulating gas carrying particles as an example, its separation process is as follows: During operation, polyethylene circulating gas carrying particles enters the separation chamber 101 through the main intake pipe 104. Since the main intake pipe 104 is arranged along the tangential direction of the cylindrical body 111, the airflow entering the separation chamber 101 rotates downward along the inner side of the multiple guide plates 130, that is, a rotating airflow is formed. When the rotating airflow moves along the cylindrical inner cavity towards the conical inner cavity, the conical baffle 120 and the multiple guide plates 130 in the separation chamber 101 will obstruct the airflow and cause it to turn upward and enter the inner side of the multiple guide plates 130, thereby entering the main exhaust pipe 105 which is connected to the area enclosed by the multiple guide plates 130, and then being discharged from the main exhaust pipe 105. During the airflow process, most of the particles carried by the polyethylene circulating air will be thrown onto the guide plate 130 under centrifugal force. Since the guide plate 130 is inclined inward with the rotating airflow, when the airflow reaches the end of each guide plate 130, a vortex airflow will be formed at the end of the guide plate 130. The separated particles will be carried to the back of the guide plate 130 by the vortex airflow, causing the particles to slide down the back of the guide plate 130 into the guide space 102 between the conical baffle 120 and the inner wall of the conical body 112, and then discharged by the main dust discharge pipe 103. The remaining particles will enter the inner side of the conical baffle 120 and be discharged by the main dust discharge pipe 103 in the same way, so as to be introduced into the ash storage hopper. This configuration makes it easier to separate particulate matter entrained in the polyethylene circulating gas and less prone to backmixing. Furthermore, depending on the particulate matter concentration in the airflow, the conical baffle 120 can be adjusted to move up and down relative to the conical inner cavity along the axis of the separator body 110. When the particulate matter concentration is high, the conical baffle 120 moves upward, allowing more particulate matter to first enter the guiding space 102 formed by the conical baffle 120 and the inner wall of the conical body 112, while the remaining gas contains fewer particulate matter, thus preventing blockage of the main dust exhaust pipe 103.

[0025] Therefore, the centrifugal separator 100, based on the structure of the conical baffle 120 and multiple guide plates 130, makes it easier to separate particulate matter entrained in the airflow, thereby improving separation efficiency, reducing the overall system energy consumption, and adapting to a wider range of particle sizes. Moreover, when separating particulate matter from the airflow, the separated particulate matter is first collected in the guide space 102 formed by the conical baffle 120 and the inner wall of the conical body 112, while the rest is collected in the conical baffle 120 and then enters the main dust discharge pipe 103, thereby diverting and discharging the particulate matter and effectively preventing dust discharge blockage.

[0026] Further, please refer to Figures 1-4 The centrifugal separator 100 also includes an intermediate spacer 140; the intermediate spacer 140 is arranged around the axis of the main body and is disposed in the cylindrical inner cavity and located inside the plurality of guide plates 130; along the axial direction of the main body, the intermediate spacer 140 is spaced apart from the upper end of the conical baffle 120; wherein, the connection between the main exhaust pipe 105 and the separation chamber 101 is located in the area enclosed by the intermediate spacer 140.

[0027] Thus, through this arrangement, a middle partition ring 140 is provided within the area enclosed by the guide plate 130, and both the guide plate 130 and the middle partition ring 140 are located within the cylindrical inner cavity of the cylindrical body 111. Furthermore, the connection between the main exhaust pipe 105 of the centrifugal separator 100 and the separation chamber 101 is located within the area enclosed by the middle partition ring 140. Based on this structural arrangement, it is convenient to perform flow diversion within the cylindrical inner cavity during the air guiding process through the middle partition ring 140.

[0028] Based on the above structural settings, please refer to Figures 1-9 The centrifugal separator 100 also includes a first sub-separator 150, which is disposed in the separation chamber 101 and whose axis coincides with the axis of the main body. The first sub-inlet pipe 151 of the first sub-separator 150 is connected to the area enclosed by the intermediate partition ring 140, the first sub-exhaust pipe 152 of the first sub-separator 150 is connected to the main exhaust pipe 105, and the first sub-dust exhaust pipe 153 of the first sub-separator 150 extends into the main dust exhaust pipe 103.

[0029] That is, through this arrangement, the airflow undergoes a first separation in the separation chamber 101, and then enters the first sub-separator 150 for a second separation as it moves toward the main exhaust pipe 105, thereby improving the separation quality. Furthermore, since the first sub-separator 150 is positioned within the separation chamber 101 and relative to the area enclosed by the intermediate partition ring 140, the inner diameter of the first sub-separation chamber 101 within the first sub-separator 150 is smaller than the inner diameter of the separation chamber 101 in the separator body 110. This causes a change in the airflow velocity after it enters the first sub-separator 150, making it easier to separate entrained particles from the airflow, thus improving separation efficiency and reducing the overall system energy consumption.

[0030] In addition, based on the structure of the first sub-separator 150, the centrifugal separator 100 may also include a plurality of second sub-separators 160. The plurality of second sub-separators 160 are arranged in a ring array around the axis of the first sub-separator 150 on the outer periphery of the first sub-separator 150 and are located inside the middle partition ring 140. The second sub-intake pipes 161 of the multiple second sub-separators 160 are all connected to the area enclosed by the intermediate partition ring 140; the second sub-exhaust pipes 162 of the multiple second sub-separators 160 are all connected to the first sub-intake pipe 151; the second sub-dust exhaust pipe 163 of the second sub-separator 160 is connected to the main dust exhaust pipe 103.

[0031] That is, by setting it up in this way, the airflow can be separated in the separation chamber 101 and then enter multiple second sub-separators 160 for secondary separation; then it will enter the first sub-separator 150 for a third separation, thereby improving the separation quality. Furthermore, since the second sub-separator 160 is configured within the separation chamber 101 and located relative to the area enclosed by the intermediate partition ring 140, and on the outer periphery of the first sub-separator 150, the airflow velocity changes accordingly after entering the second sub-separator 160 and the first sub-separator 150. This makes it easier to separate the particulate matter entrained in the airflow, thereby improving separation efficiency and reducing the overall system energy consumption.

[0032] It should also be noted that, when configuring the first sub-separator 150 and the second sub-separator 160, the second sub-intake pipes 161 of the multiple second sub-separators 160 are all connected to the area enclosed by the intermediate partition ring 140, and the second sub-exhaust pipes 162 of the multiple second sub-separators 160 are all connected to the first sub-intake pipe 151. Therefore, the airflow in the separation chamber 101 can enter the second sub-separator 160 through the multiple second sub-intake pipes 161 and then be guided into the first sub-intake pipe 151 through the multiple second sub-exhaust pipes 162, thereby guiding the airflow from the second sub-separator 160 into the first sub-separator 150. The second sub-dust exhaust pipe 163 of the second sub-separator 160 is connected to the main dust exhaust pipe 103, and the first sub-dust exhaust pipe 153 of the first sub-separator 150 extends into the main dust exhaust pipe 103. Therefore, the particles separated by the first sub-separator 150 and the second sub-separator 160 will be guided into the ash hopper connected to the main dust exhaust pipe 103 for collection.

[0033] Further, please refer to Figures 1-9As can be seen from the above, the present invention adopts a configuration of multiple second sub-separators 160. Therefore, in order to ensure that the second dust discharge pipes 163 of the multiple second sub-separators 160 are all connected to the main dust discharge pipe 103, the centrifugal separator 100 also includes a conical chamber 171 and a dust guide pipe 172. The conical chamber 171 is arranged around the axis of the main body in the separation chamber 101, and the dust guide pipe 172 is connected to the conical chamber 171 and extends into the main dust discharge pipe 103; wherein, the conical chamber... 171 is connected to the second sub-dust discharge pipe 163 of all the second sub-separators 160. That is, through the arrangement of the dust guide pipe 172 and the conical bin 171, the conical bin 171 can collect the particulate matter discharged from multiple second sub-dust discharge pipes 163. Since the dust guide pipe 172 extends into the main dust discharge pipe 103, the particulate matter discharged from multiple second sub-dust discharge pipes 163 collected by the conical bin 171 can be led out through the dust guide pipe 172 to the ash storage hopper connected to the main dust discharge pipe 103 for collection.

[0034] With the conical chamber 171 configured, when the first sub-dust exhaust pipe 153 is configured, the first sub-dust exhaust pipe 153 can pass through the conical chamber 171 and extend into the main dust exhaust pipe 103, thereby avoiding interference between the two.

[0035] Please refer to Figures 1-9 Based on the above structural configuration, when a first sub-separator 150 and multiple second sub-separators 160 are configured, in order to ensure that the airflow can flow smoothly from the separation chamber 101 to the second sub-separator 160 and the first sub-separator 150, the exhaust pipe of the second sub-separator 160 protrudes from the upper end of the separator body 110; at least a portion of the first sub-separator 150 is located outside the upper end of the separator body 110, and the portion of the first sub-separator 150 located outside the upper end of the separator body 110 is configured with multiple first sub-intake pipes 151, and the multiple first sub-intake pipes 151 are connected to the multiple second sub-exhaust pipes 162 in a one-to-one correspondence. With this configuration, the second sub-intake pipe 161 of the second sub-separator 160 is located within the area enclosed by the intermediate partition ring 140, while its second sub-exhaust pipe 162 extends out from the upper end of the separator body 110 and is connected one-to-one with the multiple first sub-intake pipes 151 of the multiple first sub-separators 150. Thus, the aforementioned structural configuration is adopted to facilitate the flow of air through the multiple second sub-separators 160 to the first sub-separator 150.

[0036] In summary, based on the above structural settings, please refer to... Figures 1-7 The centrifuge 100 provided by the present invention is further provided with a first sub-separator 150 and a plurality of second sub-separators 160. Therefore, taking the introduced airflow as polyethylene circulating gas carrying particles as an example, the separation process in the centrifuge 100 is as follows: During operation, polyethylene circulating gas entrained with particles enters the separation chamber 101 through the main inlet pipe 104. The airflow entering the separation chamber 101 rotates downwards along the inner side of multiple guide plates 130, forming a rotating airflow. As the rotating airflow moves along the cylindrical inner cavity towards the conical inner cavity, it is obstructed and deflected upwards, thus entering multiple second sub-inlet pipes 161 connected within the area enclosed by the multiple guide plates 130. During this process, most of the particles entrained by the polyethylene circulating gas are thrown onto the guide plates 130 under centrifugal force. Since the guide plate 130 is inclined inward along with the rotating airflow, when the airflow reaches the end of each guide plate 130, a vortex airflow will be formed at the end of the guide plate 130. The separated particles will be carried to the back of the guide plate 130 by the vortex airflow, causing the particles to slide down the back of the guide plate 130 into the guide space 102 between the conical baffle 120 and the inner wall of the conical body 112, and then discharged by the main dust discharge pipe 103. The remaining particles will enter the inner side of the conical baffle 120 and be discharged by the main dust discharge pipe 103 in the same way. After the airflow enters the second sub-separator 160 through the second sub-inlet pipe 161, the polyethylene circulating gas, carrying a small amount of remaining particulate matter, rotates downward along the outer side of the inner wall of the cylinder. In the conical part of the second sub-separator 160, the polyethylene circulating gas is slowly forced into the central internal region of the second sub-separator 160. As the radius of rotation of the cone decreases, the tangential velocity of the airflow increases, and at the bottom of the cone, it turns axially upward. Finally, it enters the first sub-separator 150 through the first sub-inlet pipe 151, which is connected to the second sub-exhaust pipe 162 of the second sub-separator 160, for final removal of particulate matter. During this process, the small amount of remaining particulate matter carried by the polyethylene circulating gas is thrown onto the wall of the device under centrifugal force and is transported downward to the first sub-dust exhaust pipe 153 and the second sub-dust exhaust pipe 163 for discharge along with the near-wall airflow.

[0037] It should be noted that when the centrifugal separator 100 discharges the treated airflow, it is discharged through the main exhaust pipe 105, while when the first sub-separator 150 is configured, it is discharged through the first sub-exhaust pipe 152.

[0038] This configuration makes it easier to separate particulate matter entrained in the polyethylene circulating gas. Furthermore, depending on the particulate matter concentration in the airflow, the conical baffle 120 can be adjusted to move up and down relative to the conical inner cavity along the axis of the separator body 110. When the particulate matter concentration is high, the conical baffle 120 moves upward, allowing more particulate matter to first enter the guiding space 102 formed by the conical baffle 120 and the inner wall of the conical body 112, while the remaining gas contains fewer particulate matter, thus preventing blockage of the main dust exhaust pipe 103. Moreover, it forms a three-stage separation process, improving the separation quality of particulate matter in the airflow, resulting in higher separation efficiency, adapting to a wider range of particle sizes, and enabling more precise separation of smaller, lighter, or heavier particles, while effectively preventing dust exhaust blockage.

[0039] Based on the centrifugal separator 100 described above, the present invention also provides a centrifugal separation system, which includes a gas conveying component, a gas collecting component, a dust storage hopper, and the centrifugal separator 100 described above; the gas conveying component is connected to the gas inlet pipe, the gas collecting component is connected to the gas outlet pipe, and the main dust discharge pipe 103, the first sub-dust discharge pipe 153, and the dust guide pipe 172 are connected to the dust storage hopper.

[0040] In this centrifugal separation system, the centrifugal separator 100 described above allows the airflow delivered from the gas delivery assembly to the separation chamber 101 to enter multiple second sub-separators 160 and then the first sub-separator 150, thus forming a three-stage separation. This improves the separation quality of particulate matter in the airflow. Furthermore, this configuration allows for higher separation efficiency and adaptability to a wider range of particle sizes when removing particles entrained in polyethylene circulating gas. This enables more precise separation of smaller, lighter, or heavier particles while effectively preventing dust blockage.

[0041] The method of centrifugal separation using a centrifuge includes the following steps: S1: Introduce gas containing particles into the main intake pipe 104; S2: Gas enters the cylindrical body 111 for primary solid-gas separation; The specific process of S2 is as follows: Gas enters the separation chamber 101 and rotates downward along the inner side of multiple guide plates 130. The rotating gas moves from the inner cavity of the cylindrical body 111 to the inner cavity of the conical body 112. The gas is obstructed and turns upward, entering the intermediate partition ring 140 and then entering multiple second sub-intake pipes 161. At the same time, most of the particles entrained by the gas are thrown onto the guide plates 130. The guide plates 130 tilt inward along with the rotating gas. When the gas flows to the end of each guide plate 130, a vortex gas is formed at the end of the guide plate 130. The separated particles are carried to the back of the guide plate 130 by the vortex gas. The particles slide down the back of the guide plate 130 into the guide space 102 between the conical partition 120 and the inner wall of the conical body 112, and are then discharged by the main dust discharge pipe 103. The remaining particles enter the inner side of the conical partition 120 and are discharged by the particle guide pipe.

[0042] The specific process of S3 is as follows: After the gas enters the second sub-separator 160 through the second sub-inlet pipe 161, the gas, carrying a small amount of remaining particulate matter, rotates downward along the outer side of the inner wall of the cylindrical body of the second sub-separator and enters the conical body of the second sub-separator. As the rotation radius of the conical body of the second sub-separator decreases, the tangential velocity of the gas increases, and it turns axially upward at the bottom of the conical body of the second sub-separator. It enters the first sub-separator 150 through the first sub-inlet pipe 151, which is connected to the second sub-exhaust pipe 162. Some particulate matter enters the conical chamber 171 along the second sub-dust exhaust pipe 163 and is finally discharged through the dust guide pipe 172. During this process, the small amount of remaining particulate matter carried by the gas is thrown onto the inner wall of the cylindrical body of the first sub-separator under centrifugal force. The gas is discharged through the first sub-exhaust pipe 152, and the last particulate matter is discharged through the first sub-dust exhaust pipe 153.

[0043] When the particulate matter concentration is high, the motor 7 drives the gear 8 to rotate, and the gear 8 meshes with the rack 9, causing the particulate guide tube to move upward, thereby causing the conical baffle 120 to move upward relative to the inner cavity of the conical body 112 along the axis of the cylindrical body 111, so that the cross-sectional area of ​​the annular cavity between the particulate guide tube and the main dust discharge pipe 103 increases; when the particulate matter concentration is low, the opposite operation is performed.

[0044] Example 1 like Figure 1-4As shown, the centrifugal separator proposed in this embodiment includes a cylindrical body 111, one end of which is connected to a conical body 112. The inner cavity of the cylindrical body 111 and the inner cavity of the conical body 112 together form a separation chamber 101. Several guide plates 130 are connected around the top edge of the inner cavity of the cylindrical body 111. A main air inlet pipe 104 is connected to the side of the cylindrical body 111. A first sub-separator opening is opened at the center of the top surface of the cylindrical body 111. Several second sub-separator openings are evenly opened around the first sub-separator opening. A second sub-separator 160 is inserted into each second sub-separator opening. A first sub-separator 150 is inserted into the first sub-separator opening. A main dust discharge pipe 103 is opened at the bottom of the conical body 112.

[0045] Example 2 like Figure 1-6 As shown, the centrifugal separator proposed in this embodiment includes a cylindrical body 111, one end of which is connected to a conical body 112. The inner cavity of the cylindrical body 111 and the inner cavity of the conical body 112 together form a separation chamber 101. Several guide plates 130 are connected around the top edge of the inner cavity of the cylindrical body 111. A main air inlet pipe 104 is connected to the side of the cylindrical body 111. A first sub-separator opening is opened at the center of the top surface of the cylindrical body 111. Several second sub-separator openings are evenly opened around the first sub-separator opening. A second sub-separator 160 is inserted into each second sub-separator opening. A first sub-separator 150 is inserted into the first sub-separator opening. A main dust discharge pipe 103 is opened at the bottom of the conical body 112. The inner cavity of the conical body 112 is provided with a conical partition 120. The conical body 112 and the conical partition 120 have the same slope. The tip of the conical partition 120 is connected to a particle guide tube, which passes through the main dust discharge pipe 103. The inner wall of the main dust discharge pipe 103 has two symmetrically opened sliding grooves 3. The length direction of the two sliding grooves 3 is parallel to the axis direction of the main dust discharge pipe 103. The inner wall of the main dust discharge pipe 103 also has two symmetrically opened rack grooves 4. A rack 9 is fixedly connected to the side wall of each rack groove 4. Two support plates 5 are symmetrically fixed to the outer side of the particle guide tube. Each support plate 5 is slidably connected to the corresponding sliding groove 3. Two motor support plates 6 are also symmetrically fixed to the outer side of the particle guide tube. A motor 7 is fixedly connected to each motor support plate 6. The output shaft of the motor 7 is perpendicular to the axis direction of the main dust discharge pipe 103. A gear 8 is fixedly connected to the output shaft of the motor 7. Each gear 8 meshes with the corresponding rack 9.

[0046] Example 3 like Figure 1-7As shown, the centrifugal separator proposed in this embodiment includes a cylindrical body 111, one end of which is connected to a conical body 112. The inner cavity of the cylindrical body 111 and the inner cavity of the conical body 112 together form a separation chamber 101. Several guide plates 130 are connected around the top edge of the inner cavity of the cylindrical body 111. A main air inlet pipe 104 is connected to the side of the cylindrical body 111. A first sub-separator opening is opened at the center of the top surface of the cylindrical body 111. Several second sub-separator openings are evenly opened around the first sub-separator opening. A second sub-separator 160 is inserted into each second sub-separator opening. A first sub-separator 150 is inserted into the first sub-separator opening. A main dust discharge pipe 103 is opened at the bottom of the conical body 112. The inner cavity of the conical body 112 is provided with a conical partition 120. The conical body 112 and the conical partition 120 have the same slope. The tip of the conical partition 120 is connected to a particle guide tube, which passes through the main dust discharge pipe 103. The inner wall of the main dust discharge pipe 103 has two symmetrically opened sliding grooves 3. The length direction of the two sliding grooves 3 is parallel to the axis direction of the main dust discharge pipe 103. The inner wall of the main dust discharge pipe 103 also has two symmetrically opened rack grooves 4. A rack 9 is fixedly connected to the side wall of each rack groove 4. Two support plates 5 are symmetrically fixed to the outer side of the particle guide tube. Each support plate 5 is slidably connected to the corresponding sliding groove 3. Two motor support plates 6 are also symmetrically fixed to the outer side of the particle guide tube. A motor 7 is fixedly connected to each motor support plate 6. The output shaft of the motor 7 is perpendicular to the axis direction of the main dust discharge pipe 103. A gear 8 is fixedly connected to the output shaft of the motor 7. Each gear 8 meshes with the corresponding rack 9. A middle spacer 140 is fixed to the top of the inner cavity of the cylindrical body 111, and the middle spacer 140 is arranged around the axis of the main dust exhaust pipe 103; a number of guide plates 130 are arranged in a ring array around the axis of the main dust exhaust pipe 103 in the inner cavity of the cylindrical body 111, and each guide plate 130 is arranged at an angle of 18°-60° relative to the corresponding tangential direction of the main dust exhaust pipe 103, and the lower end of each guide plate 130 is directly opposite the upper end of the conical partition 120; the connection between the main air intake pipe 104 and the separation chamber 101 is located outside the area enclosed by the multiple guide plates 130.

[0047] Example 4 like Figure 1-9As shown, the centrifugal separator proposed in this embodiment includes a cylindrical body 111, one end of which is connected to a conical body 112. The inner cavity of the cylindrical body 111 and the inner cavity of the conical body 112 together form a separation chamber 101. Several guide plates 130 are connected around the top edge of the inner cavity of the cylindrical body 111. A main air inlet pipe 104 is connected to the side of the cylindrical body 111. A first sub-separator opening is opened at the center of the top surface of the cylindrical body 111. Several second sub-separator openings are evenly opened around the first sub-separator opening. A second sub-separator 160 is inserted into each second sub-separator opening. A first sub-separator 150 is inserted into the first sub-separator opening. A main dust discharge pipe 103 is opened at the bottom of the conical body 112. The inner cavity of the conical body 112 is provided with a conical partition 120. The conical body 112 and the conical partition 120 have the same slope. The tip of the conical partition 120 is connected to a particle guide tube, which passes through the main dust discharge pipe 103. The inner wall of the main dust discharge pipe 103 has two symmetrically opened sliding grooves 3. The length direction of the two sliding grooves 3 is parallel to the axis direction of the main dust discharge pipe 103. The inner wall of the main dust discharge pipe 103 also has two symmetrically opened rack grooves 4. A rack 9 is fixedly connected to the side wall of each rack groove 4. Two support plates 5 are symmetrically fixed to the outer side of the particle guide tube. Each support plate 5 is slidably connected to the corresponding sliding groove 3. Two motor support plates 6 are also symmetrically fixed to the outer side of the particle guide tube. A motor 7 is fixedly connected to each motor support plate 6. The output shaft of the motor 7 is perpendicular to the axis direction of the main dust discharge pipe 103. A gear 8 is fixedly connected to the output shaft of the motor 7. Each gear 8 meshes with the corresponding rack 9. A middle spacer 140 is fixed to the top of the inner cavity of the cylindrical body 111, and the middle spacer 140 is arranged around the axis of the main dust exhaust pipe 103; a number of guide plates 130 are arranged in a ring array around the axis of the main dust exhaust pipe 103 in the inner cavity of the cylindrical body 111, and each guide plate 130 is arranged at an angle of 18°-60° relative to the corresponding tangential direction of the main dust exhaust pipe 103, and the lower end of each guide plate 130 is directly opposite the upper end of the conical partition 120; the connection between the main air intake pipe 104 and the separation chamber 101 is located outside the area enclosed by the multiple guide plates 130. The second sub-separator 160 includes a cylindrical body, which is inserted into the opening of the second sub-separator. A second sub-inlet pipe 161 is connected to the side of the cylindrical body. The second sub-inlet pipe 161 is set at 0-60° relative to the tangential direction of the main dust discharge pipe 103. A second sub-exhaust pipe 162 is connected to the top center of the cylindrical body. The other end of the cylindrical body is connected to a conical body. The tip of the conical body is connected to a second sub-dust discharge pipe 163. The other end of the dust discharge pipe 163 is connected to a conical chamber 171. The tip of the conical chamber 171 is connected to a dust guide pipe 172, which is inserted into the particle guide pipe. Each second sub-separator 160 is located inside the intermediate spacer 140.

[0048] Example 5 like Figure 1-9 As shown, Figure 1-9As shown, the centrifugal separator proposed in this embodiment includes a cylindrical body 111, one end of which is connected to a conical body 112. The inner cavity of the cylindrical body 111 and the inner cavity of the conical body 112 together form a separation chamber 101. Several guide plates 130 are connected around the top edge of the inner cavity of the cylindrical body 111. A main air inlet pipe 104 is connected to the side of the cylindrical body 111. A first sub-separator opening is opened at the center of the top surface of the cylindrical body 111. Several second sub-separator openings are evenly opened around the first sub-separator opening. A second sub-separator 160 is inserted into each second sub-separator opening. A first sub-separator 150 is inserted into the first sub-separator opening. A main dust discharge pipe 103 is opened at the bottom of the conical body 112. The inner cavity of the conical body 112 is provided with a conical partition 120. The conical body 112 and the conical partition 120 have the same slope. The tip of the conical partition 120 is connected to a particle guide tube, which passes through the main dust discharge pipe 103. The inner wall of the main dust discharge pipe 103 has two symmetrically opened sliding grooves 3. The length direction of the two sliding grooves 3 is parallel to the axis direction of the main dust discharge pipe 103. The inner wall of the main dust discharge pipe 103 also has two symmetrically opened rack grooves 4. A rack 9 is fixedly connected to the side wall of each rack groove 4. Two support plates 5 are symmetrically fixed to the outer side of the particle guide tube. Each support plate 5 is slidably connected to the corresponding sliding groove 3. Two motor support plates 6 are also symmetrically fixed to the outer side of the particle guide tube. A motor 7 is fixedly connected to each motor support plate 6. The output shaft of the motor 7 is perpendicular to the axis direction of the main dust discharge pipe 103. A gear 8 is fixedly connected to the output shaft of the motor 7. Each gear 8 meshes with the corresponding rack 9. A middle spacer 140 is fixed to the top of the inner cavity of the cylindrical body 111, and the middle spacer 140 is arranged around the axis of the main dust exhaust pipe 103; a number of guide plates 130 are arranged in a ring array around the axis of the main dust exhaust pipe 103 in the inner cavity of the cylindrical body 111, and each guide plate 130 is arranged at an angle of 18°-60° relative to the corresponding tangential direction of the main dust exhaust pipe 103, and the lower end of each guide plate 130 is directly opposite the upper end of the conical partition 120; the connection between the main air intake pipe 104 and the separation chamber 101 is located outside the area enclosed by the multiple guide plates 130. The second sub-separator 160 includes a cylindrical body, which is inserted into the opening of the second sub-separator. A second sub-inlet pipe 161 is connected to the side of the cylindrical body. The second sub-inlet pipe 161 is set at 0-60° relative to the tangential direction of the main dust discharge pipe 103. A second sub-exhaust pipe 162 is connected to the top center of the cylindrical body. The other end of the cylindrical body is connected to a conical body. The tip of the conical body is connected to a second sub-dust discharge pipe 163. The other end of the dust discharge pipe 163 is connected to a conical chamber 171. The tip of the conical chamber 171 is connected to a dust guide pipe 172, which is inserted into the particle guide pipe. Each second sub-separator 160 is located inside the intermediate spacer 140.The second sub-exhaust pipe 162 includes a first column pipe 16201. One end of the first column pipe 16201 extends into the conical body of the second sub-separator and communicates with the inner cavity of the conical body of the separator. The other end of the first column pipe 16201 is connected to a second column pipe 16202. The diameter of the second column pipe 16202 is larger than the diameter of the first column pipe 16201. The second column pipe 16202 is connected to the first sub-separator 150. The first sub-separator 150 includes a cylindrical body, which is inserted into an opening. A first sub-intake pipe 151 is connected to the outer cylindrical surface of the first sub-separator body. The other end of the first sub-intake pipe 151 is connected to the cylindrical side of the second column pipe 16202. The two ends of the first sub-intake pipe 151 are tangent to the first sub-separator body and the second column pipe 16202, respectively. The other end of the first sub-separator body is connected to a conical body. The tip of the conical body is connected to a first sub-dust exhaust pipe 153. The first sub-dust exhaust pipe 153 is inserted into a conical chamber 171 and is inserted into a dust guide pipe 172. A first sub-exhaust pipe 152 is inserted at the top center of the first sub-separator body.

[0049] Example 6 like Figure 1-9 As shown, the present invention provides a method for centrifugal separation using a centrifugal separator, specifically including the following steps: S1: Introduce gas containing particles into the main intake pipe 104; S2: Gas enters the cylindrical body 111 for primary solid-gas separation; the specific process of S2 is as follows: Gas enters the separation chamber 101 and rotates downward along the inner side of multiple guide plates 130. The rotating gas moves from the inner cavity of the cylindrical body 111 to the inner cavity of the conical body 112. The gas is obstructed and turns upward, entering the intermediate partition ring 140 and then entering multiple second sub-intake pipes 161. At the same time, most of the particles entrained by the gas are thrown onto the guide plates 130. The guide plates 130 tilt inward along with the rotating gas. When the gas flows to the end of each guide plate 130, a vortex gas is formed at the end of the guide plate 130. The separated particles are carried to the back of the guide plate 130 by the vortex gas. The particles slide down the back of the guide plate 130 into the guide space 102 between the conical partition 120 and the inner wall of the conical body 112, and are then discharged by the main dust discharge pipe 103. The remaining particles enter the inner side of the conical partition 120 and are discharged by the particle guide pipe.

[0050] S3: The gas after primary solid-gas separation flows into the second sub-separator 160 for secondary solid-gas separation, and then enters the first sub-separator 150 for tertiary solid-gas separation. The specific process of S3 is as follows: After the gas enters the second sub-separator 160 through the second sub-inlet pipe 161, the gas, carrying a small amount of remaining particulate matter, rotates downward along the outer side of the inner wall of the cylindrical body of the second sub-separator and enters the conical body of the second sub-separator. As the rotation radius of the conical body of the second sub-separator decreases, the tangential velocity of the gas increases, and it turns axially upward at the bottom of the conical body of the second sub-separator. It enters the first sub-separator 150 through the first sub-inlet pipe 151, which is connected to the second sub-exhaust pipe 162. Some particulate matter enters the conical chamber 171 along the second sub-dust exhaust pipe 163 and is finally discharged through the dust guide pipe 172. During this process, the small amount of remaining particulate matter carried by the gas is thrown onto the inner wall of the cylindrical body of the first sub-separator under centrifugal force. The gas is discharged through the first sub-exhaust pipe 152, and the last particulate matter is discharged through the first sub-dust exhaust pipe 153.

Claims

1. A centrifugal separator, characterized in that, The device includes a cylindrical body (111), one end of which is connected to a conical body (112). The inner cavities of the cylindrical body (111) and the conical body (112) together form a separation chamber (101). Several guide plates (130) are connected around the top edge of the inner cavity of the cylindrical body (111). A main air intake pipe (104) is connected to the side of the cylindrical body (111). A first sub-separator opening is provided at the center of the top surface of the cylindrical body (111). Several second sub-separator openings are evenly provided around the first sub-separator opening. A second sub-separator (160) is inserted into each second sub-separator opening. A first sub-separator (150) is inserted into the first sub-separator opening. A main dust exhaust pipe (103) is provided at the bottom of the conical body (112).

2. The centrifugal separator according to claim 1, characterized in that, The inner cavity of the conical body (112) is provided with a conical partition (120). The conical body (112) and the conical partition (120) have the same slope. The tip of the conical partition (120) is connected to a particle guide tube, which passes through the main dust discharge pipe (103). The inner wall of the main dust discharge pipe (103) is symmetrically provided with two sliding grooves (3). The length direction of the two sliding grooves (3) is parallel to the axial direction of the main dust discharge pipe (103). The inner wall of the main dust discharge pipe (103) is also symmetrically provided with two rack grooves (4). A rack (9) is fixedly connected to the side wall of each rack groove (4). Two support plates (5) are symmetrically fixed to the outside of the particle guide pipe. Each support plate (5) is slidably connected to the corresponding slide groove (3). Two motor support plates (6) are also symmetrically fixed to the outside of the particle guide pipe. A motor (7) is fixedly connected to each motor support plate (6). The output shaft of the motor (7) is perpendicular to the axis of the main dust discharge pipe (103). A gear (8) is fixedly connected to the output shaft of the motor (7). Each gear (8) meshes with the corresponding rack (9).

3. The centrifuge according to claim 2, characterized in that, A middle spacer (140) is fixed to the top of the inner cavity of the cylindrical body (111), and the middle spacer (140) is arranged around the axis of the main dust exhaust pipe (103); a plurality of the guide plates (130) are arranged in a ring array around the axis of the main dust exhaust pipe (103) in the inner cavity of the cylindrical body (111), and each guide plate (130) is arranged at an angle of 18°-60° relative to the corresponding tangential direction of the main dust exhaust pipe (103), and the lower end of each guide plate (130) is directly opposite the upper end of the conical partition (120); the connection between the main air intake pipe (104) and the separation chamber (101) is located outside the area enclosed by the plurality of guide plates (130).

4. The centrifuge according to claim 3, characterized in that, The second sub-separator (160) includes a cylindrical body of the second sub-separator, which is inserted into the opening of the second sub-separator. The side of the cylindrical body of the second sub-separator is connected to a second sub-inlet pipe (161). The second sub-inlet pipe (161) is set at 0-60° relative to the tangential direction of the main dust discharge pipe (103). The top center of the cylindrical body of the second sub-separator is connected to a second sub-exhaust pipe (162). The other end of the cylindrical body of the second sub-separator is connected to a conical body of the second sub-separator. The tip of the conical body of the second sub-separator is connected to a second sub-dust discharge pipe (163). The other end of the second sub-dust discharge pipe (163) is connected to a conical chamber (171). The tip of the conical chamber (171) is connected to a dust guide pipe (172). The dust guide pipe (172) is inserted into the particle guide pipe. Each second sub-separator (160) is located inside the intermediate spacer (140).

5. The centrifuge according to claim 4, characterized in that, The second sub-exhaust pipe (162) includes a first column pipe (16201), one end of which extends into the conical body of the second sub-separator and communicates with the inner cavity of the conical body of the separator. The other end of the first column pipe (16201) is connected to a second column pipe (16202). The diameter of the second column pipe (16202) is larger than the diameter of the first column pipe (16201). The second column pipe (16202) is connected to the first sub-separator (150).

6. The centrifuge according to claim 5, characterized in that, The first sub-separator (150) includes a first sub-separator cylindrical body, which is inserted into the opening of the first sub-separator. A first sub-inlet pipe (151) is connected to the outer side of the cylindrical surface of the first sub-separator cylindrical body. The other end of the first sub-inlet pipe (151) is connected to the cylindrical side of the second column pipe (16202). The two ends of the first sub-inlet pipe (151) are tangent to the first sub-separator cylindrical body and the second column pipe (16202) respectively. The other end of the first sub-separator cylindrical body is connected to a first sub-separator conical body. The tip of the first sub-separator conical body is connected to a first sub-dust exhaust pipe (153). The first sub-dust exhaust pipe (153) is inserted into the conical chamber (171) and is inserted into the dust guide pipe (172). A first sub-exhaust pipe (152) is inserted through the top center of the first sub-separator cylindrical body.

7. A method for centrifugal separation using the centrifuge as described in claim 6, characterized in that, Specifically, the steps include the following: S1: Introduce gas containing particles into the main intake pipe (104); S2: Gas enters the cylindrical body (111) for primary solid-gas separation; S3: The gas after primary solid-gas separation flows into the second sub-separator (160) for secondary solid-gas separation, and then enters the first sub-separator (150) for tertiary solid-gas separation.

8. The centrifugal separation method according to claim 7, characterized in that, The specific process of S2 is as follows: Gas enters the separation chamber (101) and rotates downwards along the inner side of multiple guide plates (130). The rotating gas moves from the inner cavity of the cylindrical body (111) towards the inner cavity of the conical body (112). The gas is obstructed and deflects upwards, entering the intermediate spacer (140) and then entering multiple second sub-intake pipes (161). At the same time, most of the particles entrained by the gas are thrown onto the guide plates (130), which tilt inwards along with the rotating gas. When the guide plate (130) reaches the end, a vortex gas will be formed at the end of the guide plate (130), which will carry the separated particles to the back of the guide plate (130) through the vortex gas. The particles will slide down the back of the guide plate (130) into the guide space (102) between the conical baffle (120) and the inner wall of the conical body (112), and then be discharged by the main dust discharge pipe (103). The remaining particles will enter the inner side of the conical baffle (120) and be discharged by the particle guide pipe.

9. The centrifugal separation method according to claim 8, characterized in that, The specific process of S3 is as follows: After the gas enters the second sub-separator (160) through the second sub-inlet pipe (161), the gas carries the remaining small part of the particles and rotates downward along the outer side of the inner wall of the cylindrical body of the second sub-separator into the conical body of the second sub-separator. As the rotation radius of the conical body of the second sub-separator decreases, the tangential velocity of the gas increases and turns axially upward at the bottom of the conical body of the second sub-separator. It enters the first sub-separator (150) through the first sub-inlet pipe (151) which is connected to the second sub-exhaust pipe (162) one by one. Some particles enter the conical chamber (171) along the second sub-dust discharge pipe (163) and are finally discharged through the dust guide pipe (172). During this process, the remaining small part of the particles carried by the gas will be thrown onto the inner wall of the cylindrical body of the first sub-separator under centrifugal force. The gas is discharged through the first sub-exhaust pipe (152), and the last particles are discharged through the first sub-dust discharge pipe (153).

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