Centrifugal separation device

Abstract

The utility model relates to the technical field of material separation devices, in particular to a centrifugal separation device which comprises a cavity, a centrifugal assembly and an impeller assembly, the cavity is provided with a feed port and a heavy phase outlet, the centrifugal assembly is rotatably arranged in the cavity and comprises a cylindrical filter layer and an occupying part arranged on the radial inner side of the filter layer, and the impeller assembly is arranged in the cavity. An annular gap area is formed between the occupying part and the filtering layer, a hollow area is arranged in the occupying part and is communicated to an impeller assembly arranged outside the cavity, an outlet of the impeller assembly forms a light phase outlet, and the annular gap area is communicated to the hollow area of the occupying part through a communication part arranged at the end part or the middle part of the occupying part in the axial direction. According to the centrifugal separation device, filtering treatment is carried out through the filtering layer while centrifugal separation is carried out, the passing ability of the filtering layer is improved through the impeller assembly, and the separation and filtering efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material separation devices, in particular to a centrifugal separation device. Background Art

[0002] In daily production, it is often necessary to separate and treat impurities in the materials to obtain pure substances. Centrifugal separation is a commonly used separation method, which uses centrifugal force to separate materials with different specific gravities. Specifically, when the impurity-containing material rotates around a central axis, the impurity-containing material will be affected by the centrifugal force. The higher the rotation rate, the greater the centrifugal force on the impurity-containing material. At the same rotation speed, materials of different sizes and densities in the impurity-containing material will settle at different rates. For example, in the separation of solid and liquid, if the density of the solid phase material is greater than that of the liquid material. The solid phase material is the heavy phase and the liquid material is the light phase. The heavy phase will gradually move away from the central axis along the direction of the centrifugal force, and the effective separation of the dense heavy phase and the light phase can be achieved. The centrifugal separation device commonly used in the prior art usually relies only on centrifugal force to separate materials. Both the heavy phase and the light phase are affected by the centrifugal force and have a tendency to move radially outward. The light phase is difficult to extract efficiently, and the separation efficiency is low. Utility Model Content

[0003] The technical problem to be solved and the technical task proposed by the utility model are to improve the existing technology and provide a centrifugal separation device to solve the problem of low separation efficiency of the centrifugal separation device in the current technology.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A centrifugal separation device comprises a cavity, a centrifugal assembly and an impeller assembly, wherein the cavity is provided with a feed inlet and a heavy phase outlet, the centrifugal assembly is rotatably arranged in the cavity, the centrifugal assembly comprises a cylindrical filter layer and a placeholder arranged on the radial inner side of the filter layer, an annular gap area is formed between the placeholder and the filter layer, a hollow area is arranged inside the placeholder, the hollow area is connected to the impeller assembly arranged outside the cavity, the outlet of the impeller assembly constitutes a light phase outlet, and the annular gap area is connected to the hollow area of ​​the placeholder through a connecting portion arranged at the end and / or middle of the placeholder in the axial direction. The centrifugal separation device described in the utility model uses a high-speed rotating centrifugal assembly to perform centrifugal separation, while allowing the filter layer to filter the separated light phase, thereby better ensuring that a light phase with high purity is obtained, so that impurities can be better separated and removed, due to the blocking effect of the filter layer and the centrifugal force, the light phase has a low permeability through the filter layer, which is balanced by the negative pressure generated by the impeller assembly, so that the light phase can pass through the filter layer more efficiently, thereby improving the separation efficiency. More importantly, the utility model provides a placeholder on the radial inner side of the filter layer, and utilizes the placeholder to occupy most of the space on the radial inner side of the filter layer, so that the liquid can only be distributed in the area radially outside the placeholder, that is, the annular gap area and the radial outer area of ​​the filter layer, thereby effectively reducing the amount of liquid in the cavity, so that the liquid can be stirred only by rotating the centrifugal assembly, so that the liquid rotates at high speed to achieve centrifugal separation, and there is no need to additionally provide a blade mechanism for stirring in the cavity. The structure is simple and compact, the occupied volume is reduced, and the filtration separation process can be reliably achieved during high-speed centrifugal separation, thereby ensuring an efficient separation effect.

[0006] Furthermore, the ratio of the outer diameter of the placeholder to the outer diameter of the filter layer is 0.7 to 0.9: 1. The size of the annular gap area is controlled to ensure that the centrifugal assembly can effectively stir the liquid to rotate at high speed when rotating, thereby ensuring the effect of centrifugal separation, avoiding the situation where the liquid fails to rotate at high speed and is only filtered through the filter layer, ensuring that the centrifugal separation process and the filtration separation process can be efficiently combined to improve the separation efficiency and effect.

[0007] Furthermore, the placeholder is cylindrical in shape as a whole, and includes an inner cylinder wall and an outer cylinder wall spaced apart in the radial direction, a supporting partition is connected between the inner cylinder wall and the outer cylinder wall, and the radial inner area of ​​the inner cylinder wall is the hollow area. While the placeholder occupies a large space, the structure is lightweight, the power consumption required to drive the centrifugal assembly to rotate at high speed is reduced, and an efficient separation effect is ensured.

[0008] Furthermore, a spacer is provided between the placeholder and the filter layer, a plurality of through holes are provided on the spacer along the circumferential direction, and a plurality of the spacers are provided at intervals along the axial direction of the filter layer, thereby improving the structural stability, ensuring a stable annular gap area between the placeholder and the filter layer, and ensuring the stability of centrifugal separation and filtration separation.

[0009] Furthermore, the centrifugal assembly is coaxially arranged with the impeller assembly and driven by the same driving mechanism, so the structure is compact and the occupied space is reduced.

[0010] Furthermore, the rotating shaft of the driving mechanism penetrates into the cavity from the outside, the impeller assembly is mounted on the shaft section of the rotating shaft outside the cavity, the centrifugal assembly is sleeved and connected to the shaft section of the rotating shaft inside the cavity, the rotating shaft is a hollow shaft, and the hollow area of ​​the placeholder is connected to the impeller assembly through the internal hollow of the rotating shaft. The rotating shaft is used to transmit power and also serves as a passage for the light phase to pass through, and has a compact structure and occupies little space.

[0011] Furthermore, the cavity is in the shape of a truncated cone, and the heavy phase outlet is arranged at the large-diameter end of the cavity and close to the radial outer side. The high-speed rotating centrifugal assembly stirs the material entering the cavity, so that the material is driven to rotate at a high speed to achieve centrifugal separation, and the heavy phase is pushed radially outward under the action of centrifugal force, that is, the heavy phase is pushed to the outer wall of the cavity. Since the cavity is in the shape of a truncated cone, the side wall of the cavity is inclined relative to the axial direction, and the heavy phase can move more effectively along the side wall of the cavity and then be discharged from the heavy phase outlet.

[0012] Furthermore, the heavy phase outlet is oriented along the circumference of the cavity, and the material is driven to rotate in the cavity by the high-speed rotating centrifugal assembly, and the separated heavy phase is also rotating, so that it can be discharged more smoothly from the heavy phase outlet oriented along the circumference of the cavity.

[0013] Furthermore, a plurality of heavy phase outlets are arranged along the circumferential direction to improve the discharge efficiency of the heavy phase.

[0014] Furthermore, the large-diameter end of the cavity is connected to a collecting shell for collecting all heavy phase outlets, and a discharge port is arranged at the bottom of the collecting shell to centrally collect the heavy phase discharged from the heavy phase outlet and then discharge it.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The centrifugal separation device of the utility model performs filtering through the filter layer during centrifugal separation, and utilizes the impeller component to increase the permeability of the filter layer, thereby ensuring the purity of the material obtained by separation and filtration, improving the separation and filtration efficiency, having a simple and compact structure and occupying a small volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall appearance structure of a centrifugal separation device of the utility model;

[0018] Figure 2 for Figure 1 A schematic cross-sectional view of the centrifugal separation device shown;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the centrifugal assembly installed in the cavity.

[0020] In the figure:

[0021] Cavity 1, centrifugal assembly 2, filter layer 21, placeholder 22, hollow area 221, inner cylinder wall 222, outer cylinder wall 223, support partition 224, annular gap area 23, connecting part 24, partition 25, impeller assembly 3, feed inlet 11, heavy phase outlet 12, light phase outlet 31, drive mechanism 4, rotating shaft 41, collecting shell 5, discharge port 51. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model discloses a centrifugal separation device, which improves the passability of the light phase, so that the heavy phase and the light phase can be separated more efficiently, thereby improving the separation efficiency.

[0024] like Figures 1 to 3As shown, a centrifugal separation device mainly includes a cavity 1, a centrifugal assembly 2 and an impeller assembly 3, the cavity 1 is provided with a feed inlet 11 and a heavy phase outlet 12, the centrifugal assembly 2 is rotatably arranged in the cavity 1, the centrifugal assembly 2 includes a cylindrical filter layer 21 and a placeholder 22 arranged on the radial inner side of the filter layer 21, an annular gap area 23 is formed between the placeholder 22 and the filter layer 21, a hollow area 221 is arranged inside the placeholder 22, the hollow area 221 is connected to the impeller assembly 3 arranged outside the cavity 1, the outlet of the impeller assembly 3 constitutes a light phase outlet 31, and the annular gap area 23 is connected to the hollow area 221 of the placeholder 22 through a connecting portion 24 arranged at the end and / or middle of the placeholder 22 in the axial direction. The cavity 1 serves as a chamber for centrifugal separation. The material to be separated enters the cavity 1 from the feed port 11. The centrifugal assembly 2 rotates to drive the material to rotate in the cavity 1. Due to the action of centrifugal force, the material is centrifugally separated radially in the cavity 1, with the heavy phase on the radial outer side and the light phase on the radial inner side. The light phase passes through the filter layer 21 for filtering. Under the dual effects of centrifugal separation and filtering, the purity of the separated light phase is guaranteed and the separation effect is improved. Since the light phase needs to pass through the filter layer 21, the filter layer 21 hinders the passage of the light phase, that is, there is a filtration resistance, which will affect the efficiency of separation and filtration. For this reason, an impeller assembly 3 is provided. The impeller assembly 3 generates a negative pressure suction force to draw out the light phase that passes through the filter layer 21 and enters the inner hollow of the centrifugal assembly 2, balance the resistance of the filter layer 21, improve the passability, and allow the light phase to pass through the filter layer 21 more efficiently, thereby improving the efficiency of separation and filtration, and avoiding the light phase from being difficult to pass through the filter layer 21 due to the obstruction of the filter layer 21, thereby causing the light phase to be easily discharged from the heavy phase outlet 12 along with the heavy phase, affecting the centrifugal separation effect.

[0025] More importantly, the centrifugal assembly in this embodiment includes a placeholder 22 arranged on the radial inner side of the filter layer 21, and the placeholder 22 occupies most of the space on the radial inner side of the filter layer, so that the liquid can only be distributed in the area radially outside the placeholder 22, that is, the liquid can only be distributed in the annular gap area 23 and the radial outer area of ​​the filter layer 21, thereby effectively reducing the amount of liquid in the cavity 1, so that the liquid can be stirred only by rotating the centrifugal assembly 2, and the liquid can be rotated at high speed to achieve centrifugal separation, without the need to additionally set up a blade mechanism for stirring in the cavity 1, the structure is simple and compact, the occupied volume is reduced, and the filtration separation process can be reliably achieved during high-speed centrifugal separation, thereby ensuring an efficient separation effect. When the centrifugal component is only provided with a cylindrical filter layer 21, the filter layer 21 has a large space inside, so that the entire cavity 1 can accommodate a large amount of liquid. The resistance of the liquid is large. When the amount of liquid is large, it is usually necessary to provide rotating blades to drive the liquid to rotate at high speed. It is difficult to effectively stir the liquid in the cavity 1 only by rotating the cylindrical filter layer 21, so it will result in the need to add additional blades for stirring in the cavity 1. In this embodiment, a placeholder 22 is used to effectively reduce the amount of liquid that can be accommodated in the cavity 1. The placeholder 22 occupies most of the space on the radial inner side of the filter layer 21. The liquid cannot enter the space occupied by the placeholder 22, so that the radial inner side of the filter layer 21 only has an annular gap area 23 adjacent to the filter layer 21. The space of the annular gap area is small, and the amount of liquid that can be accommodated is small, which greatly reduces the amount of liquid in the entire cavity 1. Therefore, when the centrifugal component 2 rotates, it can effectively drive the liquid in the entire cavity 1 to rotate, and effectively reduce the power required to drive the liquid to rotate at high speed, thereby reducing the power consumption of the entire centrifugal separation device while ensuring the separation effect.

[0026] Furthermore, the ratio of the outer diameter of the placeholder 22 to the outer diameter of the filter layer 21 is 0.7 to 0.9:1, the placeholder 22 occupies most of the radial inner space of the filter layer 21, and the radial width of the annular gap area 23 is only 10% to 30% of the outer diameter of the filter layer 21. The size of the annular gap area 23 is controlled to ensure that the liquid can be effectively stirred when the centrifugal assembly 2 rotates to make the liquid rotate at high speed, thereby ensuring the effect of centrifugal separation, avoiding the situation where the liquid fails to rotate at high speed and is only filtered through the filter layer, ensuring that the centrifugal separation process and the filtration separation process can be efficiently combined to improve the separation efficiency and effect. The radial width of the annular gap area 23 is related to the power of the centrifugal separation device. When the power of the centrifugal separation device is large, the radial width of the annular gap area 23 is large.

[0027] More specifically, the placeholder 22 is a liquid-impermeable solid component, which mainly occupies space. The placeholder 22 has a large volume. If the placeholder 22 is heavy, the power consumption required to drive the centrifugal assembly 2 to rotate will be seriously increased. Therefore, the placeholder 22 preferably adopts a large volume and light weight structure, such as Figure 2 and Figure 3 As shown, the placeholder 22 is cylindrical as a whole, and includes an inner cylinder wall 222 and an outer cylinder wall 223 arranged at intervals in the radial direction. A supporting partition 224 is connected between the inner cylinder wall 222 and the outer cylinder wall 223. The radial inner area of ​​the inner cylinder wall 222 is the hollow area 221. The placeholder 22 has a light structure and occupies a large space. While ensuring that the centrifugal assembly 2 can effectively stir the liquid to rotate, it reduces the power required to drive the centrifugal assembly 2 to rotate, thereby ensuring an efficient separation effect. Furthermore, a spacer 25 is provided between the placeholder 22 and the filter layer 21, and a plurality of through holes are opened on the spacer 25 along the circumferential direction. The spacer 25 is provided with a plurality of holes along the axial interval of the filter layer 21, so as to improve the structural stability, ensure a stable annular gap area between the placeholder and the filter layer, and ensure the stability of centrifugal separation and filtration separation. The through holes on the spacer 25 serve to allow liquid to pass through, so that the liquid filtered from different places of the filter layer 21 can be converged to the connecting part 24 through the through holes on the spacer 25, and then enter the hollow area 221 of the placeholder 22 and finally be discharged from the light phase outlet 31.

[0028] Further, such as Figure 2 and Figure 3As shown, the centrifugal assembly 2 is a cylindrical structure as a whole. The outermost circumferential wall of the centrifugal assembly 2 is the filter layer 21. The centrifugal assembly 2 also includes end plates respectively arranged at the axial ends of the filter layer 21. The end plates and the filter layer 21 are combined into a relatively closed space. The liquid can only pass through the filter layer 21 and enter the closed space. The placeholder 22 is arranged on the radial inner side of the filter layer 21. The placeholder 22 can be formed by splicing and assembling plates. In a specific embodiment, a connecting portion 24 is arranged at the axial end of the placeholder 22. The axial length of the placeholder 22 is smaller than the axial length of the filter layer 21. One axial end of the placeholder 22 is connected to one end plate, and the other axial end of the placeholder 22 is spaced from the other end plate to form a connecting portion 24. The connecting portion 24 is specifically a spacing area covering the entire circumference. The structure is simple, stable, and easy to implement. The liquid that passes through the filter layer 21 and enters the annular gap area 23 can only enter the hollow area 221 of the placeholder 22 through the connecting portion 24, and then is pumped out by negative pressure under the action of the impeller assembly 3. In addition, the connecting portion 24 can also be arranged in the middle of the placeholder 22 in the axial direction. The connecting portion 24 can also be a plurality of channels spaced along the circumferential direction of the filter layer 21, which can also enable the liquid that passes through the filter layer 21 and enters the annular gap area 23 to effectively enter the hollow area 221 of the placeholder 22, and finally enable the clean liquid at the separation to be pumped out by negative pressure under the action of the impeller assembly 3.

[0029] Furthermore, the centrifugal assembly 2 and the impeller assembly 3 are coaxially arranged to be driven by the same driving mechanism 4, with a compact structure and small space occupation. The driving mechanism 4 drives the impeller assembly 3 and the centrifugal assembly 2 to rotate synchronously, the centrifugal assembly 2 stirs the material to perform centrifugal separation and filtration, and the impeller assembly 3 generates a negative pressure force, so that the separated light phase can be more efficiently discharged from the light phase outlet 31 after passing through the filter layer 21, thereby improving the efficiency of separation and filtration. Of course, the centrifugal assembly 2 and the impeller assembly 3 can also be driven by different driving mechanisms to operate, so that the operating speeds of the centrifugal assembly 2 and the impeller assembly 3 can be controlled separately, and the operating speeds of the two can be the same or different, and can be flexibly adjusted as needed. As long as the internal hollow of the centrifugal assembly 2 extends to the outside of the cavity 1 to connect to the impeller assembly 3, the negative pressure force generated by the impeller assembly 3 when working can balance the resistance of the light phase passing through the filter layer 21, thereby improving the separation and filtration efficiency. Of course, using two independent driving mechanisms will make the overall volume larger.

[0030] In one embodiment, Figure 2As shown, the rotating shaft 41 of the driving mechanism 4 penetrates into the cavity 1 from the outside, the impeller assembly 3 is installed on the shaft section of the rotating shaft 41 outside the cavity 1, and the centrifugal assembly 2 is sleeved and installed on the shaft section of the rotating shaft 41 inside the cavity 1. The rotating shaft 41 is a hollow shaft, which is hollow inside and has a through hole on the wall to connect the centrifugal assembly 2 to the impeller assembly 3, that is, the hollow area 221 of the placeholder 22 is connected to the impeller assembly 3 through the internal hollow of the rotating shaft 41, the structure is compact, the space occupied is small, and the rotating shaft 41 As both a transmission component and a channel component, the light phase separated and filtered by the centrifugal component 2 enters the impeller component 3 through the rotating shaft 41, and then the impeller component 3 sends the light phase out from the light phase outlet. More specifically, the rotating shaft 41 is provided with a plurality of through holes distributed along the circumferential and axial directions on the shaft section inside the cavity 1, so that the light phase can efficiently enter the rotating shaft 41, and the rotating shaft 41 is provided with a plurality of through holes distributed along the circumferential direction on the shaft section outside the cavity 1, so that the light phase can efficiently enter the impeller component 3, so as to avoid forming a bottleneck and limiting the delivery rate of the light phase.

[0031] In one embodiment, the cavity 1 is in the shape of a truncated cone, the feed port 11 is arranged on the bottom end face of the cavity 1, and the heavy phase outlet 12 is arranged on the large-diameter end of the cavity 1 and close to the radial outside. More specifically, the centrifugal separation device adopts a vertical structure, that is, the rotation axis of the centrifugal component 2 and the impeller component 3 is along the vertical direction, the central axis of the cavity 1 is also along the vertical direction, the rotation axis of the centrifugal component 2 and the impeller component 3 coincides with the central axis of the cavity 1, the large-diameter end of the truncated cone-shaped cavity 1 is on the lower side and the small-diameter end is on the upper side, the material enters the cavity 1 through the feed port 11, and rotates at a high speed under the stirring of the centrifugal component 2, and the heavy phase to be separated and removed moves radially outward under the action of centrifugal force, that is, the heavy phase is concentrated in the radially outer region of the cavity 1, so that the heavy phase can be effectively discharged from the large-diameter end on the lower side of the cavity 1 and close to the heavy phase outlet 12 on the radial outside. And because the cavity 1 is in the shape of a truncated cone, the side wall surface of the cavity 1 is an inclined surface relative to the rotation axis of the centrifugal assembly 2. The heavy phase is thrown onto the side wall surface of the cavity 1 due to the centrifugal force, and the heavy phase can flow along the side wall surface of the cavity 1 to the lower bottom surface of the cavity 1 to be discharged from the heavy phase outlet 12, thereby improving the efficiency of heavy phase discharge. Furthermore, the direction of the heavy phase outlet 12 is along the circumference of the cavity 1, and there are several heavy phase outlets 12 arranged along the circumference. The separated heavy phase is in rotational motion, so it can be discharged more efficiently and smoothly from the heavy phase outlet 12 along the circumference of the cavity, and will not affect the rotation state of the material in the cavity 1, thereby ensuring the continuous stability of centrifugal separation. Furthermore, the large-diameter end at the lower part of the cavity 1 is connected to a funnel-shaped collecting shell 5 for collecting all heavy phase outlets 12, and a discharge port 51 is arranged at the bottom of the collecting shell 5. The collecting shell 5 is used to centrally collect the heavy phase discharged from the heavy phase outlet 12, and a valve is arranged at the discharge port 51 to control the discharge of the heavy phase as needed.

[0032] The centrifugal separation device is suitable for solid-liquid separation, that is, the solid impurities in the liquid are effectively removed by centrifugal separation and filtration to obtain pure liquid. The centrifugal separation device is suitable for the field of food processing, such as separation and filtration of brine. When food is immersed in brine for processing, the residue on the food will enter the brine. After long-term use, the food residue will affect the taste of the brine and cause blockage during the circulation of the brine. Therefore, the brine needs to be filtered to effectively remove the food residue, ensure the purity of the brine, and ensure the processing taste. The brine mixed with food residue is fed into the cavity 1 from the feed port 11, and the cavity 1 is driven by the centrifugal assembly 2 to rotate at a high speed to achieve centrifugal separation. The food residue is separated from the brine under the action of centrifugal force and the filter layer 21. The food residue moves radially outward and flows along the side wall of the cavity 1, and is finally discharged from the heavy phase outlet 12, while the brine moves radially inward to pass through the filter layer 21, and then the pure brine enters the impeller assembly 3 to be pumped and discharged by the impeller assembly 3.

[0033] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention. The protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A centrifugal separation device, characterized in that: The invention comprises a cavity (1), a centrifugal assembly (2) and an impeller assembly (3); the cavity (1) is provided with a feed inlet (11) and a heavy phase outlet (12); the centrifugal assembly (2) is rotatably arranged in the cavity (1); the centrifugal assembly (2) comprises a cylindrical filter layer (21) and a placeholder (22) arranged on the radial inner side of the filter layer (21); an annular gap area (23) is formed between the placeholder (22) and the filter layer (21); a hollow area (221) is arranged inside the placeholder (22); the hollow area (221) is connected to the impeller assembly (3) arranged outside the cavity (1); the outlet of the impeller assembly (3) constitutes a light phase outlet (31); the annular gap area (23) is connected to the hollow area (221) of the placeholder (22) through a connecting portion (24) arranged at the end and / or the middle of the placeholder (22) in the axial direction.

2. The centrifugal separation device according to claim 1, characterized in that: The ratio of the outer diameter of the placeholder (22) to the outer diameter of the filter layer (21) is 0.7-0.9:

1.

3. The centrifugal separation device according to claim 1, characterized in that: The placeholder (22) is cylindrical in shape as a whole, and comprises an inner cylinder wall (222) and an outer cylinder wall (223) arranged at intervals in the radial direction, a supporting partition (224) is connected between the inner cylinder wall (222) and the outer cylinder wall (223), and the radial inner area of ​​the inner cylinder wall (222) is the hollow area (221).

4. The centrifugal separation device according to claim 1, characterized in that: A spacer (25) is provided between the placeholder (22) and the filter layer (21), a plurality of through holes are provided on the spacer (25) along the circumferential direction, and a plurality of spacers (25) are provided at intervals along the axial direction of the filter layer (21).

5. The centrifugal separation device according to claim 1, characterized in that: The centrifugal assembly (2) and the impeller assembly (3) are coaxially arranged and driven by the same driving mechanism (4).

6. The centrifugal separation device according to claim 5, characterized in that: The rotating shaft (41) of the driving mechanism (4) penetrates into the cavity (1) from the outside, the impeller assembly (3) is mounted on the shaft section of the rotating shaft (41) outside the cavity (1), the centrifugal assembly (2) is sleeved and connected to the shaft section of the rotating shaft (41) inside the cavity (1), the rotating shaft (41) is a hollow shaft, and the hollow area (221) of the placeholder (22) is connected to the impeller assembly (3) through the internal hollow of the rotating shaft (41).

7. The centrifugal separation device according to claim 1, characterized in that: The cavity (1) is in the shape of a truncated cone, and the heavy phase outlet (12) is arranged at the large-diameter end of the cavity (1) and close to the radial outer side.

8. The centrifugal separation device according to claim 7, characterized in that: The heavy phase outlet (12) is oriented along the circumference of the chamber (1).

9. The centrifugal separation device according to claim 7, characterized in that: A plurality of heavy phase outlets (12) are arranged along the circumferential direction.

10. The centrifugal separation device according to claim 9, characterized in that: The large-diameter end of the cavity (1) is connected to a collecting shell (5) for collecting all heavy phase outlets (12), and a discharge port (51) is arranged at the bottom of the collecting shell (5).

Images