Composite glass fiber wiredrawing pretreatment impurity separation equipment

Abstract

The invention belongs to the technical field of centrifugal separation, and particularly relates to composite glass fiber wiredrawing pretreatment impurity separation equipment which comprises a frame body, a vertical centrifugal cylinder assembly and a centrifugal driving assembly. The vertical centrifugal cylinder assembly comprises a fixed charging barrel on the outer layer and a centrifugal rotor in the fixed charging barrel, a plurality of vertical convex rib plates are arranged on the inner wall of the centrifugal rotor, a plurality of transverse centrifugal runners are formed in the rib plates, one ends of the centrifugal runners are located on the outer wall of the centrifugal rotor, and the other ends of the centrifugal runners are located in an inner cavity of the centrifugal rotor; the middle shaft is a hollow shaft and is divided into a feeding runner at the upper part and an impurity discharging runner at the lower part; a discharging groove is formed in the bottom end of the feeding runner, an air port formed in the outer wall of the middle shaft is formed above the discharging groove, and the air port communicates with an exhaust hole outside the fixed charging barrel; and an absorption groove is formed in the impurity removal flow channel and is positioned at the centrifugal rotor part. By adopting the efficient centrifugal impurity removal system, the problem of temperature attenuation caused by a long impurity removal passage in the traditional process is avoided, so that unnecessary overtemperature heating is reduced, and the energy consumption of the whole production system can be reduced.

Description

Technical Field

[0001] The present invention relates to an impurity separation device for the pre-treatment of composite glass fiber drawing, belonging to the technical field of centrifugal separation. Background Art

[0002] Wind turbine blades are one of the key components of wind turbines. With the continuous increase in the power of generating units and the application of offshore wind power and low-wind-speed large-blade wind turbine products, the blade size specifications are getting larger and larger (for example, the blade type of a certain technology is 147 meters). As the blade type size increases, the requirements for fabric performance are also getting higher and higher; the proportion of the gram weight of high-performance composite glass fiber fabric in the entire blade decreases, and at the same time, the modulus increases significantly, which is favored by large-blade wind turbine blades. Although carbon fiber has higher performance, it is expensive and has too low cost performance. Therefore, the wind power industry has explored high-performance composite glass fiber fabrics with relatively high modulus performance on the basis of existing materials, realizing the production of larger blade types.

[0003] The glass fabric fiber batch will clarify and remove impurities after melting. Taking the currently commonly used tank drawing process as an example, the glass fabric fiber batch needs to be heated at a high temperature in a furnace until it is transformed into a uniform molten state. Subsequently, these molten batches flow through the main channel called the "tank", and during this process, clarification and removal of the contained impurities are achieved. However, due to the long length of the "tank", the batch liquid will experience a significant temperature drop while flowing through the "tank" for impurity removal. To make up for this temperature decay and ensure that the molten liquid can reach the required temperature when reaching the drawing stage, there are usually two methods: one is to heat the batch liquid to a temperature higher than the normal required temperature in the furnace stage before entering the "tank"; the other is to apply additional electrical heating to the batch liquid using a platinum-rhodium drawing nozzle during the drawing process. Both of these methods will inevitably lead to a large amount of energy consumption. Summary of the Invention

[0004] According to the deficiencies in the above prior art, the technical problem to be solved by the present invention is: to provide an impurity separation device for the pre-treatment of composite glass fiber drawing, aiming to optimize the impurity removal system in the process of glass fiber preparation, reduce the temperature decay during impurity removal, reduce the energy consumption of the entire production system, and at the same time ensure the quality and production efficiency of high-performance composite glass fibers.

[0005] The impurity separation device for the pre-treatment of composite glass fiber drawing described in the present invention includes a frame body, a vertical centrifugal cylinder assembly, and a centrifugal drive assembly; the vertical centrifugal cylinder assembly includes a fixed cylinder on the outer layer and a centrifugal rotor therein. The upper and lower ends of the fixed cylinder are closed, and a closed centrifugal material bin is formed between the fixed cylinder and the centrifugal rotor. The bottom of the centrifugal material bin is connected to a separation material pipe;

[0006] The upper and lower ends of the centrifugal rotor are also closed. The lower end is funnel-shaped and fixed on the central shaft so that it can rotate with the central shaft. There are several vertically protruding rib plates on the inner wall of the centrifugal rotor. The rib plates are evenly distributed in a circumferential array on the inner wall of the centrifugal rotor. Several horizontal centrifugal flow channels are provided along the height direction of the rib plates. The centrifugal flow channels penetrate the rib plates. One end is located on the outer wall of the centrifugal rotor, and the other end is located in the centrifugal cavity inside the centrifugal rotor.

[0007] The upper and lower ends of the central shaft penetrate the centrifugal rotor and the fixed cylinder. The central shaft is a hollow shaft. There is a blocking plate inside the central shaft. The blocking plate divides the inner part of the central shaft into an upper feed flow channel and a lower impurity discharge flow channel. The bottom end of the feed flow channel is provided with a discharge groove that penetrates the inner and outer walls of the central shaft. Above the discharge groove, there is an air port opened on the outer wall of the central shaft. The air port is communicated with the exhaust hole above through an air channel inside the central shaft wall. The exhaust hole is located outside the fixed cylinder. The impurity discharge flow channel is provided with an absorption groove that penetrates the inner and outer walls of the central shaft. The absorption groove is located at the bottom of the funnel-shaped lower end of the centrifugal rotor.

[0008] The molten glass fabric fiber batch realizes an efficient impurity removal process in a specially designed centrifugal impurity removal system. This system mainly relies on the high-speed rotation of the centrifugal rotor to effectively separate impurities of different densities. The molten glass fabric fiber batch is guided to the central shaft and flows into the inside of the centrifugal rotor from the feed flow channel. Under the action of the high-speed rotation of the centrifugal rotor, the particulate impurities (with a larger density) in the batch gradually move away from the center due to the centrifugal force and are thrown between the rib plates on the inner wall of the centrifugal rotor. These impurities further settle under the action of gravity and are sucked into the absorption groove through the funnel-shaped lower end of the centrifugal rotor, and finally discharged through the impurity discharge flow channel. At the same time, impurities with a smaller density such as bubbles gradually float up and gather towards the center, enter the air port located at the liquid level height, and then pass through the air channel inside the central shaft wall, and finally are discharged from the exhaust hole at the top. The air pressure inside and outside the centrifugal rotor is always kept balanced. The batch with a high purity in the middle area is thrown into the centrifugal bin of the fixed cylinder through the centrifugal flow channel in the rib plate and then flows out through the separation pipe at the bottom. Without passing through the traditional long impurity removal path, it helps to maintain the temperature stability of the molten batch and avoids the temperature attenuation caused in the previous impurity removal process. Through the efficient centrifugal impurity removal method, unnecessary heating and energy consumption are reduced. It is estimated that this system can effectively reduce the energy consumption of the entire production system by 15% - 20%.

[0009] Furthermore, a horizontal partition plate is also provided inside the centrifugal rotor. The partition plate is located below the rib plate. The partition plate divides the internal space of the centrifugal rotor into an upper centrifugal cavity and a lower liquid leakage cavity. A number of leakage holes evenly distributed in a circumferential array are opened at the outer edge of the partition plate close to the inner wall of the centrifugal rotor. The absorption groove is located at the bottom of the liquid leakage cavity. During the centrifugal separation process, after the impurities settle under the action of gravity, they flow into the liquid leakage cavity through the leakage holes at the outer edge of the partition plate, thereby reducing the unnecessary outflow of the batch and improving the utilization rate of the batch.

[0010] Preferably, a plurality of air inlets and discharge grooves are provided, and the plurality of air inlets and discharge grooves are evenly distributed in a circumferential array.

[0011] The centrifugal drive assembly of the present invention includes a speed reducer and a motor connected thereto. The output shaft of the speed reducer is a vertical hollow shaft and outputs bidirectionally up and down. The upper end of the middle shaft is fixedly connected to the lower end of the output shaft of the speed reducer, and the upper end of the output shaft of the speed reducer is rotationally connected to the feed pipe through a feed rotary joint. The lower end of the middle shaft is rotationally connected to the impurity discharge pipe through an impurity discharge rotary joint. To ensure the centrifugal safety of the high-temperature molten material, the present invention encloses the fixed cylinder and the centrifugal rotor as a whole and selects to continuously feed through the hollow output shaft of the speed reducer to improve the continuity and production efficiency of the entire production process.

[0012] In addition, a flow guide cylinder is sleeved on the middle shaft. The flow guide cylinder is an inverted cone with a smaller diameter at the upper end and a larger diameter at the lower end. The flow guide cylinder is located below the discharge groove and above the partition in the centrifugal chamber. The flow guide cylinder is used to guide impurities such as bubbles with a smaller density. During the process of the inverted cone-shaped flow guide cylinder causing impurities such as bubbles with a smaller density to gather towards the center, under the action of the vertical component of the centrifugal force, they accelerate and float upward along the outer wall of the flow guide cylinder, improving the separation effect of low-density impurities.

[0013] Preferably, a sight glass is provided on the fixed cylinder to observe the working conditions inside the cylinder.

[0014] Multiple centrifuges are connected in parallel. All the centrifuges are connected to the same liquid material main pipe through the feed pipe; all are connected to the same separated material main pipe through the separated material pipe; all are connected to the same impurity material main pipe through the impurity discharge pipe, forming a centrifugal unit group to improve the separation flow rate and efficiency.

[0015] The beneficial effects of the present invention compared with the prior art are as follows:

[0016] 1. Significantly reduce the overall energy consumption of the production system: By adopting an efficient centrifugal impurity removal system, the present invention avoids the temperature attenuation problem caused by the long impurity removal path in the traditional process, thereby reducing unnecessary over-temperature heating. It is estimated that this system can effectively reduce the energy consumption of the entire production system by 15% - 20%, which not only reduces the production cost but also helps to achieve a more environmentally friendly and sustainable production process.

[0017] 2. Optimize the impurity separation effect: The centrifugal rotor design in the present invention, including structures such as rib plates, centrifugal flow channels, partitions, and leakage holes, enables efficient separation of impurities with different densities. Particle impurities are thrown to the inner wall of the centrifugal rotor and settle, while light impurities such as bubbles float up and are discharged through the air inlets. At the same time, through the structural design such as the flow guide cylinder, the separation path of light impurities such as bubbles is further optimized, thus ensuring the purity of the molten compounding material.

[0018] 3. Improve production continuity and efficiency: In the design of the centrifugal drive assembly in the present invention, continuous feeding is achieved through the hollow output shaft of the speed reducer, ensuring the continuity and stability of the production process. At the same time, multiple centrifuges can be connected in parallel to form a centrifugal unit, further increasing the separation flow rate and production efficiency.

[0019] 4. Enhance equipment safety: In the present invention, the fixed cylinder and the centrifugal rotor are integrally enclosed, effectively avoiding potential safety hazards during the centrifugation of high-temperature molten materials.

[0020] 5. This project conforms to the current development trend of wind turbine blades, improves the market adaptability for the development of high-performance composite fabrics for wind turbine blades, and addresses the demand for large-scale blades in the wind power market.

[0021] The composite glass fiber drawing pretreatment impurity separation equipment described in the present invention shows significant advantages in terms of energy efficiency, impurity separation effect, production continuity, and equipment safety, providing an efficient, low-energy-consuming, safe, and reliable solution for the production of high-performance composite glass fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is one of the schematic structural diagrams of multiple centrifuges connected in parallel;

[0023] Figure 2 is another schematic structural diagram of multiple centrifuges connected in parallel;

[0024] Figure 3 is Figure 1 the schematic diagram after one of the centrifuges is cut open;

[0025] Figure 4 is the schematic structural diagram of a single centrifuge;

[0026] Figure 5 is one of the schematic structural diagrams of a single centrifuge with the frame hidden;

[0027] Figure 6 is another schematic structural diagram of a single centrifuge with the frame hidden;

[0028] Figure 7 is the schematic diagram after the fixed cylinder is cut open;

[0029] Figure 8 is the schematic diagram after the fixed cylinder and the centrifugal rotor are cut open;

[0030] Figure 9 is the three-dimensional structural schematic diagram of the centrifugal rotor;

[0031] Figure 10 is the top-view structural schematic diagram of the centrifugal rotor;

[0032] Figure 11It is a three-dimensional structural schematic diagram of the central axis;

[0033] Figure 12 It is a sectional structural schematic diagram of the central axis;

[0034] Figure 13 It is a sectional structural schematic diagram of the rotor lower cover;

[0035] Figure 14 It is one of the sectional structural schematic diagrams of a single centrifuge;

[0036] Figure 15 It is the second sectional structural schematic diagram of a single centrifuge.

[0037] In the figure: 1, main liquid material pipe; 2, feed pipe; 3, centrifugal unit; 4, separated material pipe; 5, main separated material pipe; 6, impurity discharge pipe; 7, main impurity material pipe; 8, feed rotary joint; 9, upper coupling; 10, speed reducer; 11, frame; 12, fixed cylinder; 13, impurity discharge rotary joint; 14, lower coupling; 15, central axis; 16, exhaust hole; 17, cylinder upper cover; 18, sight glass; 19, cylinder lower cover; 20, centrifugal rotor; 21, rotor upper cover; 22, air port; 23, discharge chute; 24, guide cylinder; 25, leakage hole; 26, partition board; 27, rotor lower cover; 28, absorption groove; 29, rib plate; 30, centrifugal flow channel; 31, feed flow channel; 32, air channel; 33, sealing plate; 34, impurity discharge flow channel. Specific embodiments

[0038] The present invention will be further described below in conjunction with specific embodiments.

[0039] However, the description of the present invention is only an embodiment of structural and even functional descriptions, and the scope of rights of the present invention is not limited by the embodiments described in the text.

[0040] For example, multiple embodiments can have various changes and various forms, and it should be understood that the scope of rights of the present invention includes equivalents that can implement the technical idea.

[0041] This embodiment is achieved through the following technical solutions:

[0042] It includes four centrifuges connected in parallel. Each centrifuge serves as an independent centrifugal unit 3, and each centrifugal unit 3 includes a frame 11, a vertical centrifugal cylinder assembly, and a centrifugal drive assembly.

[0043] The vertical centrifugal cylinder assembly includes a fixed outer cylinder 12 and a centrifugal rotor 20 inside it. The outer wall of the fixed cylinder 12 is provided with heat insulation cotton to enhance heat insulation and prevent the molten glass fiber material from solidifying. The upper and lower ends of the fixed cylinder 12 are respectively equipped with an upper cylinder cover 17 and a lower cylinder cover 19 to seal the fixed cylinder 12, and the upper cylinder cover 17 is provided with a viewing port 18. A closed centrifugal bin is formed between the fixed cylinder 12 and the centrifugal rotor 20, and the bottom of the centrifugal bin is connected to a separation material pipe 4.

[0044] The upper and lower ends of the centrifugal rotor 20 are respectively equipped with an upper rotor cover 21 and a lower rotor cover 27 to seal the centrifugal rotor 20. The lower rotor cover 27 is funnel-shaped, and the centrifugal rotor 20 is fixed on the central axis 15 and can rotate with it. A number of vertically protruding rib plates 29 are provided on the inner wall of the centrifugal rotor 20, and the rib plates 29 are evenly distributed in a circumferential array on the inner wall of the centrifugal rotor 20. A number of horizontal centrifugal flow channels 30 are provided along the height direction of the rib plates 29. The centrifugal flow channels 30 penetrate the rib plates 29, one end is located on the outer wall of the centrifugal rotor 20, and the other end is located in the centrifugal cavity inside the centrifugal rotor 20.

[0045] The upper and lower ends of the central axis 15 penetrate through the centrifugal rotor 20 and the fixed cylinder 12; the central axis 15 is a hollow shaft, and a blocking plate 33 is provided inside the central axis 15. The blocking plate 33 divides the inner part of the central axis 15 into an upper feed flow channel 31 and a lower impurity discharge flow channel 34; the bottom end of the feed flow channel 31 is provided with a discharge slot 23 that penetrates the inner and outer walls of the central axis 15. Above the discharge slot 23, an air port 22 is provided on the outer wall of the central axis 15. The air port 22 is communicated with the exhaust hole 16 above through an air duct 32 inside the wall of the central axis 15, and the exhaust hole 16 is located outside the fixed cylinder 12; an absorption slot 28 that penetrates the inner and outer walls of the central axis 15 is provided on the impurity discharge flow channel 34, and the absorption slot 28 is located at the bottom of the funnel-shaped lower end of the centrifugal rotor 20. A number of air ports 22 and discharge slots 23 are provided, and a number of air ports 22 and discharge slots 23 are evenly distributed in a circumferential array.

[0046] A horizontal partition plate 26 is further provided inside the centrifugal rotor 20 in this embodiment. The partition plate 26 is located below the rib plates 29. The partition plate 26 divides the inner space of the centrifugal rotor 20 into an upper centrifugal cavity and a lower liquid leakage cavity. A number of leakage holes 25 evenly distributed in a circumferential array are provided at the outer edge of the partition plate 26 close to the inner wall of the centrifugal rotor 20. The above-mentioned absorption slot 28 is located at the bottom of the liquid leakage cavity. In addition, a guide cylinder 24 is sleeved on the central axis 15. The guide cylinder 24 is in an inverted conical shape with a smaller upper diameter and a larger lower diameter. The guide cylinder 24 is located below the discharge slot 23 and above the partition plate 26 in the centrifugal cavity.

[0047] The centrifugal drive assembly of this embodiment includes a speed reducer 10 and a motor connected thereto. The output shaft of the speed reducer 10 is a vertical hollow shaft and outputs bidirectionally up and down. The upper end of the middle shaft 15 is fixedly connected to the lower end of the output shaft of the speed reducer 10 through a lower coupling 14. The upper end of the output shaft of the speed reducer 10 is rotationally connected to the feed pipe 2 through an upper coupling 9 and a feed rotary joint 8. The lower end of the middle shaft 15 is rotationally connected to the impurity discharge pipe 6 through an impurity discharge rotary joint 13.

[0048] To meet the separation flow rate and efficiency requirements of the entire production system, this embodiment adopts a parallel connection method of four centrifuges. Each centrifuge is connected to the same liquid material main pipe 1 through the feed pipe 2, is connected to the same separated material main pipe 5 through the separated material pipe 4, and is connected to the same impurity material main pipe 7 through the impurity discharge pipe 6.

[0049] This system mainly relies on the high-speed rotation of the centrifugal rotor to effectively separate impurities with different densities in the molten glass fabric fiber batch. The molten glass fabric fiber batch is guided from the liquid material main pipe 1, through the feed pipe 2 and the feed rotary joint 8 to the middle shaft 15, and flows into the inside of the centrifugal rotor 20 from the feed flow channel 31. Under the action of the high-speed rotation of the centrifugal rotor 20, the particulate impurities (with a larger density) in the batch gradually move away from the center due to the centrifugal force and are thrown between the rib plates 29 on the inner wall of the centrifugal rotor 20. These impurities further settle under the action of gravity. After the impurities settle, they flow from the leakage holes 25 on the outer edge of the partition plate 26 into the leakage liquid cavity, thereby reducing the unnecessary outflow of the batch and improving the utilization rate of the batch. The impurities in the leakage liquid cavity are sucked into the absorption tank 28 at the bottom through the funnel-shaped lower rotor cover 27 of the rotor, and finally discharged to the impurity material main pipe 7 through the impurity discharge flow channel 34 in the middle shaft 15, through the impurity discharge rotary joint 13 and the impurity discharge pipe 6. At the same time, impurities with a smaller density such as air bubbles gradually float and gather towards the center, enter the air port 22 at the liquid level height position, and then pass through the air channel 32 in the wall of the middle shaft 15 and are finally discharged from the exhaust hole 16 at the top, so that the air pressure inside and outside the centrifugal rotor is always balanced. The batch with high purity in the middle area is thrown into the centrifugal material bin of the fixed material cylinder 12 through the centrifugal flow channel 30 in the rib plate 29, and then flows out to the separated material main pipe 5 through the separated material pipe 4 at the bottom. The batch containing impurities in the impurity material main pipe 7 can be recycled and reused to produce other by-products such as fibers with lower purity requirements.

[0050] By adopting an efficient centrifugal impurity removal system, the present invention does not need to pass through a traditional long impurity removal path, which helps to maintain the temperature stability of the molten batch and avoids the temperature attenuation caused in the previous impurity removal process. Through the efficient centrifugal impurity removal method, unnecessary heating and energy consumption are reduced. It is estimated that this system can effectively reduce the energy consumption of the entire production system by 15% - 20%.

[0051] Of course, the above is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples either. Equivalent changes and improvements made by those of ordinary skill in the art within the essence of the present invention shall fall within the scope covered by the patent of the present invention.

Claims

1. A composite glass fiber drawing pretreatment impurity separation device, characterized in that: It comprises a frame (11), a vertical centrifuge barrel assembly and a centrifuge drive assembly; the vertical centrifuge barrel assembly comprises an outer fixed barrel (12) and a centrifuge rotor (20) therein; the fixed barrel (12) is closed at both ends, a closed centrifuge silo is formed between the fixed barrel (12) and the centrifuge rotor (20), and the bottom of the centrifuge silo is connected to a separation pipe (4); The centrifugal rotor (20) is also closed at both ends, and the lower end is funnel-shaped and fixed on the central axis (15) so as to rotate therewith; a plurality of vertically protruding ribs (29) are provided on the inner wall of the centrifugal rotor (20), and the ribs (29) are evenly distributed in a circular array on the inner wall of the centrifugal rotor (20); a plurality of transverse centrifugal flow channels (30) are opened along the height direction of the ribs (29), and the centrifugal flow channels (30) pass through the ribs (29), one end of which is located on the outer wall of the centrifugal rotor (20), and the other end is located in the centrifugal cavity in the centrifugal rotor (20); The upper and lower ends of the central shaft (15) penetrate the centrifugal rotor (20) and the fixed barrel (12); the central shaft (15) is a hollow shaft, and a sealing plate (33) is provided inside the central shaft (15), and the sealing plate (33) divides the interior of the central shaft (15) into an upper feed channel (31) and a lower impurity discharge channel (34); a discharge groove (23) penetrating the inner and outer walls of the central shaft (15) is provided at the bottom end of the feed channel (31), and an air port (22) opened on the outer wall of the central shaft (15) is provided above the discharge groove (23), and the air port (22) is communicated with an upper exhaust hole (16) through an air channel (32) in the wall of the central shaft (15), and the exhaust hole (16) is located outside the fixed barrel (12); an absorption groove (28) penetrating the inner and outer walls of the central shaft (15) is provided on the impurity discharge channel (34), and the absorption groove (28) is located at the bottom of the funnel-shaped lower end of the centrifugal rotor (20).

2. The composite glass fiber drawing pretreatment impurity separation equipment according to claim 1, characterized in that: The centrifugal rotor (20) is further provided with a horizontal partition (26) inside. The partition (26) is located below the rib plate (29). The partition (26) divides the internal space of the centrifugal rotor (20) into an upper centrifugal chamber and a lower liquid leakage chamber. A plurality of leakage holes (25) evenly distributed in a circumferential array are provided at the outer edge of the partition (26) close to the inner wall of the centrifugal rotor (20). The absorption groove (28) is located at the bottom of the liquid leakage chamber.

3. The composite glass fiber drawing pretreatment impurity separation equipment according to claim 1 or 2, characterized in that: The air ports (22) and the material discharging troughs (23) are provided in a plurality, and the plurality of air ports (22) and the material discharging troughs (23) are evenly distributed in a circular array.

4. The composite glass fiber drawing pretreatment impurity separation equipment according to claim 1 or 2, characterized in that: The centrifugal drive assembly comprises a reducer (10) and a motor connected thereto, wherein the output shaft of the reducer (10) is a vertical hollow shaft with bidirectional output in both upper and lower directions; the upper end of the middle shaft (15) is fixedly connected to the lower end of the output shaft of the reducer (10), and the upper end of the output shaft of the reducer (10) is rotatably connected to a feed pipe (2) via a feed rotary joint (8); and the lower end of the middle shaft (15) is rotatably connected to a waste discharge pipe (6) via a waste discharge rotary joint (13).

5. The composite glass fiber drawing pretreatment impurity separation equipment according to claim 2, characterized in that: The central axis (15) is sleeved with a guide tube (24), which is in the shape of an inverted cone with a small diameter at the upper end and a large diameter at the lower end. The guide tube (24) is located below the discharge trough (23) in the centrifugal chamber and above the partition (26).

6. The composite glass fiber drawing pretreatment impurity separation equipment according to claim 1 or 2, characterized in that: A viewing port (18) is provided on the fixed barrel (12).

7. The composite glass fiber drawing pretreatment impurity separation equipment according to claim 1 or 2, characterized in that: Multiple centrifuges are connected in parallel, and all of them are connected to the same liquid material main pipe (1) through a feed pipe (2); all of them are connected to the same separation material main pipe (5) through a separation material pipe (4); and all of them are connected to the same impurity material main pipe (7) through a waste discharge pipe (6).

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