CN222358627U - Centrifugal separation device - Google Patents

Abstract

The utility model relates to the technical field of substance separation devices, in particular to a centrifugal separation device, which comprises a cavity, a centrifugal component and an impeller component, wherein a feed inlet and a heavy phase outlet are arranged on the cavity, the centrifugal component is rotatably arranged in the cavity, the centrifugal component comprises a cylindrical filter layer and a space occupying piece arranged on the radial inner side of the filter layer, an annular gap area is formed between the space occupying piece and the filter layer, a hollow area is arranged in the space occupying piece, the hollow area is communicated to the impeller component arranged outside the cavity, the outlet of the impeller component forms a light phase outlet, and the annular gap area is communicated to the hollow area of the space occupying piece through a communication part arranged at the axial end part or the middle part of the space occupying piece. The centrifugal separation device carries out filtration treatment through the filter layer during centrifugal separation, and increases the trafficability of the filter layer by utilizing the impeller assembly, thereby improving the separation and filtration efficiency.

Description

Centrifugal separation device

Technical Field

The utility model relates to the technical field of substance separation devices, in particular to a centrifugal separation device.

Background

In daily production, the impurity-containing material is often required to be separated and treated, so that impurities in the material are separated and removed to obtain pure substances. Centrifugal separation is a common separation method that separates substances having different specific gravities by means of centrifugal force. Specifically, when the impurity-containing material rotates around a central axis, the impurity-containing material is subjected to centrifugal force, the higher the rotation speed is, the larger the centrifugal force to which the impurity-containing material is subjected is, and substances with different densities in the impurity-containing material can be settled at different speeds under the same rotation speed, for example, solid-liquid separation treatment is performed, and if the density of the solid-phase substance is greater than that of the liquid substance. The solid phase material is the heavy phase and the liquid material is the light phase, so that the heavy phase is gradually far away from the central shaft along the direction of the centrifugal force, and the dense heavy phase and the light phase can be effectively separated. Centrifugal separation devices commonly used in the prior art generally only rely on centrifugal force to separate substances, heavy phases and light phases all tend to move radially outwards due to the action of centrifugal force, the light phases are difficult to extract efficiently, and the separation efficiency is low.

Disclosure of utility model

The utility model aims to solve the technical problems and the technical task of improving the prior art, provides a centrifugal separation device and solves the problem of lower separation efficiency of the centrifugal separation device in the prior art.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

The utility model provides a centrifugal separation device, includes cavity, centrifugal component and impeller subassembly, be provided with feed inlet and heavy phase export on the cavity, centrifugal component rotates and sets up in the cavity, centrifugal component is including being cylindric filter layer and the occupation piece that radially inboard at the filter layer set up, occupation piece with constitute annular clearance district between the filter layer, occupation piece inside sets up the sky area, the hollow district communicates to setting up at the outside impeller subassembly of cavity, the export of impeller subassembly constitutes the export of light phase, annular clearance district is through the intercommunication portion that occupation piece axial tip and/or middle part set up communicates to occupation piece's hollow zone. According to the centrifugal separation device, the centrifugal separation is carried out by utilizing the centrifugal component which rotates at a high speed, and meanwhile, the separated light phase is filtered by the filtering layer, so that the light phase with high purity can be better ensured to be obtained, impurities can be better separated and removed, the light phase passes through the filtering layer due to the blocking effect and the centrifugal force effect, the passing performance of the light phase is lower, the light phase is balanced through the negative pressure generated by the impeller component, the light phase can pass through the filtering layer more efficiently, and the separation efficiency is improved. And more importantly, the space occupying part is arranged on the radial inner side of the filter layer, and the space occupying part occupies most of the space on the radial inner side of the filter layer, so that liquid can be distributed in the radial outer side area of the space occupying part, namely the annular gap area and the radial outer side area of the filter layer, the liquid quantity in the cavity is effectively reduced, and the liquid can be stirred only by rotating the centrifugal component, so that the liquid can be rotated at a high speed to realize centrifugal separation, and a blade mechanism for stirring is not required to be additionally arranged in the cavity, so that the structure is simplified and compact, the occupied volume is reduced, the filtering separation treatment is reliably realized while the high-speed centrifugal separation is realized, and the high-efficiency separation effect is ensured.

Further, the ratio of the outer diameter of the occupying part to the outer diameter of the filter layer is 0.7-0.9:1. The size of the annular gap area is controlled, liquid can be effectively stirred when the centrifugal component rotates, so that the liquid can rotate at a high speed, the centrifugal separation effect is guaranteed, the situation that the liquid can not rotate at a high speed and is filtered only through the filter layer is avoided, the centrifugal separation treatment and the filtering separation treatment can be effectively combined, and the separation efficiency and the separation effect are improved.

Further, the space occupying piece is integrally cylindrical, the space occupying piece comprises an inner cylinder wall and an outer cylinder wall which are arranged at intervals in the radial direction, a supporting partition plate is connected between the inner cylinder wall and the outer cylinder wall, and the radial inner side area of the inner cylinder wall is the hollow area. The structure is light while the occupation of the large-size space is realized, the power consumption required by driving the centrifugal assembly to rotate at high speed is reduced, and the efficient separation effect is ensured.

Further, a spacer is arranged between the space occupying piece and the filter layer, a plurality of through holes are formed in the spacer along the circumferential direction, and a plurality of spacers are arranged along the axial direction of the filter layer at intervals. The structural stability is improved, a stable annular clearance area is arranged between the occupying part and the filter layer, and the stability of centrifugal separation and filtering separation is guaranteed.

Furthermore, the centrifugal component and the impeller component are coaxially arranged and driven by the same driving mechanism, so that the structure is compact, and the occupied space is reduced.

Further, the rotation shaft of the driving mechanism penetrates into the cavity from the outside, the impeller assembly is mounted on a shaft section of the rotation shaft outside the cavity, the centrifugal assembly is sleeved and connected on a shaft section of the rotation shaft inside the cavity, the rotation shaft is a hollow shaft, and a hollow area of the space occupying part is communicated with the impeller assembly through the hollow inside of the rotation shaft. The rotating shaft is used for transmitting power and is also used as a passage through which the light phase passes, so that the structure is compact, and the occupied space is small.

Further, the cavity is in a truncated cone shape, and the heavy phase outlet is arranged at the large-caliber end of the cavity and is close to the radial outer side. The centrifugal component capable of rotating at high speed stirs the material entering the cavity, so that the material is driven to rotate at high speed to realize centrifugal separation, the heavy phase is pushed to the radial outside under the action of centrifugal force, namely the heavy phase is pushed to the outer side wall of the cavity, and the side wall of the cavity is inclined relative to the axial direction due to the fact that the cavity is in a truncated cone shape, the heavy phase can more effectively move along the side wall of the cavity, and then is discharged from the heavy phase outlet.

Further, the direction of the heavy phase outlet is along the circumference of the cavity, the material is driven by the centrifugal component rotating at high speed to perform rotary motion in the cavity, and the separated heavy phase is also in rotary motion, so that the heavy phase can be discharged from the heavy phase outlet along the circumference of the cavity more smoothly.

Further, the heavy phase outlet is provided with a plurality of heavy phase outlets along the circumferential direction, so that the discharge efficiency of the heavy phase is improved.

Further, the large-caliber end of the cavity is connected with a collecting shell for collecting all heavy phase outlets, the bottom of the collecting shell is provided with a discharge port, and the heavy phase discharged from the heavy phase outlets is collected in a concentrated mode and then discharged.

Compared with the prior art, the utility model has the advantages that:

The centrifugal separation device carries out filtration treatment through the filter layer during centrifugal separation, and the impeller component is utilized to increase the trafficability of the filter layer, so that the purity of materials obtained through separation and filtration is ensured, the separation and filtration efficiency is improved, the structure is compact, and the occupied volume is small.

Drawings

FIG. 1 is a schematic view showing the overall outline structure of a centrifugal separator according to the present utility model;

FIG. 2 is a schematic cross-sectional view of the centrifugal separator shown in FIG. 1;

fig. 3 is a schematic cross-sectional view of the centrifugal assembly installed in the chamber.

In the figure:

The centrifugal separator comprises a cavity 1, a centrifugal assembly 2, a filter layer 21, a spacer 22, a hollow area 221, an inner cylinder wall 222, an outer cylinder wall 223, a supporting partition 224, an annular gap area 23, a communicating part 24, a partition 25, an impeller assembly 3, a feed inlet 11, a heavy phase outlet 12, a light phase outlet 31, a driving mechanism 4, a rotating shaft 41, a collecting shell 5 and a discharge outlet 51.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The centrifugal separation device disclosed by the embodiment of the utility model improves the trafficability of the light phase, so that the heavy phase and the light phase can be separated more efficiently, and the separation efficiency is improved.

As shown in fig. 1 to 3, a centrifugal separation device mainly comprises a cavity 1, a centrifugal component 2 and an impeller component 3, wherein a feed inlet 11 and a heavy phase outlet 12 are arranged on the cavity 1, the centrifugal component 2 is rotatably arranged in the cavity 1, the centrifugal component 2 comprises a cylindrical filter layer 21 and a space occupying piece 22 arranged on the radial inner side of the filter layer 21, an annular gap area 23 is formed between the space occupying piece 22 and the filter layer 21, a hollow area 221 is arranged inside the space occupying piece 22, the hollow area 221 is communicated to the impeller component 3 arranged outside the cavity 1, an outlet of the impeller component 3 forms a light phase outlet 31, and the annular gap area 23 is communicated to the hollow area 221 of the space occupying piece 22 through a communicating part 24 arranged at the axial end part and/or the middle part of the space occupying piece 22. The cavity 1 is used as a centrifugal separation cavity, materials to be separated enter the cavity 1 from the feed inlet 11, the centrifugal component 2 rotates to drive the materials to rotate in the cavity 1, centrifugal separation treatment is carried out on the materials in the cavity 1 along the radial direction due to the action of centrifugal force, heavy phases lean against the radial outer side, light phases lean against the radial inner side, the light phases pass through the filter layer 21 to carry out filtration treatment, the purity of the light phases obtained through separation is guaranteed under the double action of the centrifugal separation treatment and the filtration treatment, and the separation treatment effect is improved. Because the light phase needs to pass through filter layer 21, filter layer 21 causes the hindrance to the passage of light phase, namely there is filter resistance, thereby can influence separation filterable efficiency, for this has set up impeller subassembly 3, impeller subassembly 3 produces negative pressure suction in order to enter into centrifugal assembly 2 inside hollow light phase suction guide after passing through filter layer 21 and go out, balance filter layer 21's resistance, improve the trafficability characteristic, make the light phase can more efficient follow filter layer 21 through, and then improve separation filterable efficiency, avoid the light phase to be difficult to pass through filter layer 21 because filter layer 21 hinders the effect, and then lead to light compatibility easily to follow heavy phase to discharge from heavy phase export 12, influence centrifugal separation effect.

And more importantly, the centrifugal assembly in this embodiment includes the space occupying piece 22 that sets up in the radial inboard of filter layer 21, utilize space occupying piece 22 to occupy the radial inboard most space of filter layer, thereby liquid can only distribute in the radial outside region of space occupying piece 22, liquid can only distribute in annular clearance area 23 and the radial outside region of filter layer 21 promptly, the effectual liquid volume that reduces in cavity 1, thereby can stir liquid only through rotating centrifugal assembly 2, and make liquid high-speed rotation realize centrifugal separation, need not to set up the blade mechanism that is used for stirring in cavity 1 additionally, the steam generator is simple in structure, compactness, reduce occupation volume, reliable realization carries out filtering separation processing when high-speed centrifugal separation, ensure efficient separation effect. When the centrifugal component only sets up cylindric filter layer 21, filter layer 21 inside has great space, thereby the internal volume of whole cavity 1 can hold a large amount of liquid, the resistance of liquid is great, it can realize driving liquid and carry out high-speed rotation to need set up the blade that rotates when the liquid volume is great generally, only be difficult to effectively stir the liquid in the cavity 1 through cylindric filter layer 21 of rotation, consequently can lead to the cavity 1 in need additionally add the blade that is used for stirring, but in this embodiment, utilize the occupation piece 22 to effectively reduce the liquid volume that can hold in the cavity 1, occupation piece 22 occupies the radial inboard most space of filter layer 21, the space that occupation piece 22 was taken up can't be entered to liquid, make the radial inboard of filter layer 21 only have the annular clearance district 23 that is close to filter layer 21 department, the space in annular clearance district is little, the liquid volume that can hold, very big reduction the liquid volume in the whole cavity 1, thereby the centrifugal component 2 carries out the liquid that can effectively drive in the whole cavity 1 when rotating and carry out the rotation, and effectively reduce the power consumption of the required power of the whole separation device that drives liquid to carry out high-speed rotation, the centrifugal component is guaranteed, the centrifugal device of the effect of the whole separation while is guaranteed.

Further, the ratio of the outer diameter of the space occupying part 22 to the outer diameter of the filter layer 21 is 0.7-0.9:1, the space occupying part 22 occupies most of the space on the radial inner side of the filter layer 21, the radial width of the annular gap area 23 is only 10% -30% of the outer diameter of the filter layer 21, the size of the annular gap area 23 is controlled, the liquid can be effectively stirred to rotate at a high speed when the centrifugal assembly 2 rotates, the centrifugal separation effect is ensured, the situation that the liquid cannot rotate at a high speed and is filtered only through the filter layer is avoided, the centrifugal separation treatment and the filtering separation treatment can be combined efficiently, the separation efficiency and the separation effect are improved, the radial width of the annular gap area 23 is related to the power of the centrifugal separation device, and when the power of the centrifugal separation device is large, the radial width of the annular gap area 23 is large.

More specifically, the space occupying member 22 is a solid member that is impermeable to liquid and mainly plays a role of occupying space, the volume of the space occupying member 22 is larger, if the weight of the space occupying member 22 is larger, the power consumption required for driving the centrifugal assembly 2 to rotate is seriously increased, therefore, the space occupying member 22 preferably adopts a structure with large volume and light weight, as shown in fig. 2 and 3, the space occupying member 22 is integrally cylindrical, the space occupying member 22 comprises an inner cylinder wall 222 and an outer cylinder wall 223 which are 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 space occupying member 22 is light in structure and large in occupied space, the power required for driving the centrifugal assembly 2 to rotate is reduced while the centrifugal assembly 2 can be effectively stirred to rotate, and an efficient separation effect is ensured. Further, be provided with the spacer 25 between the piece 22 that occupies space with filter layer 21, a plurality of via holes have been seted up along circumference on the spacer 25, the spacer 25 is along the axial interval of filter layer 21 is provided with a plurality of, improves structural stability, has stable annular clearance district between guarantee piece that occupies space and the filter layer, ensures centrifugal separation and filtration separation's stability, and the via hole on the spacer 25 plays the effect that supplies the liquid to pass through for the liquid that filters from the different places of filter layer 21 can flow through the via hole on the spacer 25 to intercommunication portion 24, and then enters into the hollow district 221 of piece 22 and finally follow the light phase export 31 and discharge.

Further, as shown in fig. 2 and 3, the centrifugal assembly 2 is a cylindrical structure as a whole, the outermost circumferential cylinder wall of the centrifugal assembly 2 is the filter layer 21, the centrifugal assembly 2 further includes end plates respectively disposed at two 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 inside of the closed space, the space occupying piece 22 is disposed at the radial inner side of the filter layer 21, the space occupying piece 22 can be formed by splicing and combining plates, in one specific embodiment, a communicating part 24 is disposed at an axial end of the space occupying piece 22, specifically, the axial length of the space occupying piece 22 is smaller than the axial length of the filter layer 21, one axial end of the space occupying piece 22 is connected with one end plate, and the other axial end of the space occupying piece 22 and the other end plate have a space therebetween to form the communicating part 24, the communicating part 24 is a spacing area covering the whole circumference, the structure is simple and stable, the liquid passing through the filter layer 21 and entering the annular gap area 23 can only enter the hollow area 221 of the space occupying piece 22 through the communicating part 24, and then be pumped out under the action of the impeller assembly 3. Besides, the communicating portion 24 may be disposed at an axial middle portion of the space-occupying member 22, and the communicating portion 24 may be a plurality of channels distributed at intervals along a circumferential direction of the filter layer 21, so that the liquid that passes through the filter layer 21 and enters the annular gap region 23 can effectively enter the hollow region 221 of the space-occupying member 22, and finally clean liquid at the separated position is pumped out under negative pressure under the action of the impeller assembly 3.

Further, the centrifugal component 2 and the impeller component 3 are coaxially arranged to be driven by the same driving mechanism 4, the structure is compact, the occupied space is small, the driving mechanism 4 drives the impeller component 3 and the centrifugal component 2 to rotate synchronously, the centrifugal component 2 agitates materials to perform centrifugal separation and filtration, the impeller component 3 generates negative pressure acting force, so that separated light phases can be more efficiently discharged from the light phase outlet 31 after passing through the filter layer 21, and the efficiency of separation and filtration is improved. Of course, the centrifugal component 2 and the impeller component 3 can be driven by different driving mechanisms to operate respectively, so that the operation rates of the centrifugal component 2 and the impeller component 3 can be controlled respectively, the operation rates of the centrifugal component 2 and the impeller component 3 can be the same or different, the centrifugal component can be flexibly adjusted according to the needs, as long as the interior of the centrifugal component 2 is hollow and extends to the outside of the cavity 1 to be communicated with the impeller component 3, the negative pressure acting force generated during the operation of the impeller component 3 can balance the resistance of the light phase passing through the filter layer 21, thereby improving the separation and filtration efficiency, and of course, the whole volume can be larger by adopting two independent driving mechanisms.

In one embodiment, as shown in fig. 2, the rotation shaft 41 of the driving mechanism 4 penetrates into the cavity 1 from the outside, the impeller assembly 3 is mounted on a shaft section of the rotation shaft 41 outside the cavity 1, the centrifugal assembly 2 is sleeved on a shaft section of the rotation shaft 41 inside the cavity 1, the rotation shaft 41 is a hollow shaft, the inside of the rotation shaft 41 is hollow, and a wall surface of the rotation shaft is provided with through holes to communicate the centrifugal assembly 2 with the impeller assembly 3, that is, the hollow area 221 of the space occupying piece 22 is communicated with the impeller assembly 3 through the inside hollow of the rotation shaft 41, the structure is compact, the occupied space is small, the rotation shaft 41 serves as a transmission member and also serves as a channel piece, the light phase separated and filtered by the centrifugal assembly 2 enters the impeller assembly 3 through the rotation shaft 41, then the impeller assembly 3 sends the light phase out from the light phase outlet, more specifically, a plurality of through holes are circumferentially and axially distributed on the shaft section of the rotation shaft 41 inside the cavity 1 so as to allow the light phase to enter the rotation shaft 41, and the light phase can be efficiently distributed circumferentially on the shaft section outside the cavity 1 to the shaft section to form a plurality of through holes so as to avoid the formation of a bottleneck.

In one embodiment, the cavity 1 is in a truncated cone shape, the feed inlet 11 is arranged on the bottom side end surface of the cavity 1, the heavy phase outlet 12 is arranged on the large caliber end of the cavity 1 and is located on the radial outer side, more specifically, the centrifugal separation device adopts a vertical structure, namely, the rotation axes of the centrifugal component 2 and the impeller component 3 are vertical, the central axis of the cavity 1 is vertical, the rotation axes of the centrifugal component 2 and the impeller component 3 coincide with the central axis of the cavity 1, the large caliber end of the cavity 1 is located on the lower side, the small caliber end is located on the upper side, materials enter the cavity 1 through the feed inlet 11 and rotate at a high speed under the stirring of the centrifugal component 2, heavy phases which need to be separated and removed move towards the radial outer side under the action of centrifugal force, namely, the heavy phases are concentrated in the radial outer side area of the cavity 1, and can be effectively discharged from the large caliber end located on the lower side of the cavity 1 and the radial outer side of the heavy phase outlet 12. And because the cavity 1 is in a truncated cone shape, the side wall surface of the cavity 1 is an inclined plane which is inclined relative to the rotation axial direction of the centrifugal assembly 2, the heavy phase is thrown on the side wall surface of the cavity 1 due to the centrifugal force, and the heavy phase can flow to the lower bottom surface of the cavity 1 along the side wall surface of the cavity 1 so as to be discharged from the heavy phase outlet 12, so that the heavy phase discharging efficiency is improved. Further, the heavy phase outlet 12 is oriented along the circumferential direction of the cavity 1, and the heavy phase outlets 12 are provided with a plurality of heavy phases along the circumferential direction, and the separated heavy phases are in rotary motion, so that the heavy phases can be more efficiently and smoothly discharged from the heavy phase outlets 12 oriented along the circumferential direction of the cavity, the rotary state of the materials in the cavity 1 is not influenced, and the continuous stability of centrifugal separation is ensured. Further, a funnel-shaped collecting shell 5 for collecting all heavy phase outlets 12 is connected to the large caliber end of the lower part of the cavity 1, a discharge port 51 is arranged at the bottom of the collecting shell 5, the heavy phase discharged from the heavy phase outlets 12 is collected intensively by the collecting shell 5, and a valve is arranged at the discharge port 51 to control the discharge of the heavy phase according to the requirement.

The centrifugal separation device is suitable for solid-liquid separation, namely, solid impurities in liquid are effectively removed in a centrifugal separation and filtration mode, so that pure liquid is obtained. The centrifugal separation device is suitable for the food processing field, for example, the separation and filtration processing are carried out on the brine, when food is immersed in the brine for processing, residues on the food can enter the brine, after long-time use, the food residues can influence the taste of the brine and can be blocked in the circulating process of the brine, thereby the brine is required to be filtered, the food residues are effectively removed, the purity of the brine is ensured, the processing taste is ensured, the brine mixed with the food residues is sent into the cavity 1 from the feed inlet 11, the cavity 1 rotates at a high speed under the driving of the centrifugal assembly 2 to realize centrifugal separation, the food residues are separated from the brine under the centrifugal force effect and the effect of the filter layer 21, the food residues move radially outwards and flow along the side wall surface of the cavity 1, finally are discharged from the heavy phase outlet 12, the brine moves radially inwards 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.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the utility model, and the scope of the utility model should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims (10)

1. The utility model provides a centrifugal separation device, its characterized in that, including cavity (1), centrifugal subassembly (2) and impeller subassembly (3), be provided with feed inlet (11) and heavy phase export (12) on cavity (1), centrifugal subassembly (2) rotate and set up in cavity (1), centrifugal subassembly (2) are including being cylindric filter layer (21) and occupation piece (22) that radially inboard setting at filter layer (21), occupation piece (22) with constitute annular clearance district (23) between filter layer (21), occupation piece (22) inside sets up hollow district (221), hollow district (221) communicate to impeller subassembly (3) of setting outside cavity (1), the export of impeller subassembly (3) constitutes light phase export (31), annular clearance district (23) are through be in occupation piece (22) axial tip and/or middle part set up intercommunication portion (24) communicate to occupation piece (22) hollow district (221).

2. A centrifugal separator according to claim 1, wherein 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. A centrifugal separator according to claim 1, wherein the spacer (22) is cylindrical as a whole, the spacer (22) comprises an inner cylinder wall (222) and an outer cylinder wall (223) arranged at intervals in the radial direction, a supporting partition plate (224) is connected between the inner cylinder wall (222) and the outer cylinder wall (223), and a radially inner region of the inner cylinder wall (222) is the hollow region (221).

4. Centrifugal separation device according to claim 1, characterized in that a spacer (25) is arranged between the spacer (22) and the filter layer (21), a plurality of through holes are circumferentially arranged on the spacer (25), and the spacer (25) is provided with a plurality of through holes along the axial direction of the filter layer (21).

5. A centrifugal separation device according to claim 1, wherein the centrifugal assembly (2) is arranged coaxially with the impeller assembly (3) and driven by the same driving mechanism (4).

6. A centrifugal separation device according to claim 5, wherein the rotation shaft (41) of the driving mechanism (4) penetrates into the cavity (1) from the outside, the impeller assembly (3) is mounted on a shaft section of the rotation shaft (41) located outside the cavity (1), the centrifugal assembly (2) is connected to a shaft section of the rotation shaft (41) located inside the cavity (1) in a sleeved mode, the rotation shaft (41) is a hollow shaft, and the hollow area (221) of the space occupying part (22) is communicated to the impeller assembly (3) through the hollow inside of the rotation shaft (41).

7. A centrifugal separation device according to claim 1, wherein the chamber (1) is cone-shaped, and the heavy phase outlet (12) is arranged radially outside the large diameter end of the chamber (1).

8. A centrifugal separation device according to claim 7, wherein the heavy phase outlet (12) is oriented along the circumference of the chamber (1).

9. A centrifugal separation device according to claim 7, wherein the heavy phase outlets (12) are provided in several numbers in the circumferential direction.

10. A centrifugal separation device according to claim 9, wherein the large diameter end of the chamber (1) is connected with a collecting shell (5) for collecting all heavy phase outlets (12), the bottom of the collecting shell (5) being provided with a discharge opening (51).