An apparatus for reducing the content of ultrafine dust in basic slice particles

Abstract

The present invention relates to the technical field of polyester chip production, and provides a device for reducing the content of ultrafine dust in basic chip particles, including a first pipeline powder electrostatic elimination system, a buffer silo, a dust separation system and a dust removal system. The first pipeline powder electrostatic elimination system is connected to the feed inlet of the buffer silo to monitor and eliminate the surface static electricity of the basic chip particles transported to the buffer silo through the pneumatic conveying pipeline. The discharge port of the buffer silo is connected to the feed inlet of the dust separation system, and the dust separation system is connected to the dust removal system. The present invention uses the first pipeline electrostatic elimination system to eliminate the static electricity of the basic chip particles, and reduces the particle conveying speed in the pneumatic conveying system through the buffer silo; the ultrafine dust is separated from the large particle chips through the dust separation system, and the separated dust is recovered through the dust removal system, so as to control the content of ultrafine dust on the surface of the basic chips.

Description

Technical Field

[0001] The present invention relates to the technical field of polyester chip production, and particularly relates to a device for reducing the content of ultrafine dust in basic chip particles. Background Art

[0002] Polyester chips (polyethylene terephthalate, PET), produced by polymerizing terephthalic acid and ethylene glycol, are raw materials for manufacturing fibers, films, and bottles. The final high-molecular particle product of polyester chips is synthesized through melt polycondensation reaction and solid-phase polycondensation of low-molecular-weight and uncrystallized basic chips. When the basic chips are synthesized by solid-phase polycondensation, the content of ultrafine dust in the basic chips must be strictly controlled, because preventing small-particle ultrafine powders from causing a decrease in the uniformity of the chip product, an increase in the melting point and crystallinity during solid-phase polycondensation synthesis, which seriously affects the subsequent product processing performance, such as causing the appearance of crystal points and cracks in bottles.

[0003] Basic chips are high-insulating polymer materials. In the actual industrial production process of polyester products, the synthesized basic chips are transported to the basic chip silo through a pneumatic conveying system and are used for the next solid-phase polycondensation synthesis. During the pneumatic conveying process of the basic chips, due to violent collisions, friction, and extrusion by equipment, etc., not only does it cause the PET basic chips to contain dust (ultrafine powder), but also causes the chip pellets to carry a large amount of static electricity. The static electricity generated by the basic chips has a long dissipation time, and the accumulated static charges are not only large in quantity but also difficult to dissipate. The charged PET basic chip pellets firmly adsorb the ultrafine dust on the surface of the pellet particles due to electrostatic adsorption. Since the ultrafine dust electrostatically adsorbed in the basic chips has a significant adverse impact on the solid-phase polycondensation treatment of polyester chips and even the uniformity of the final product, it cannot meet the requirements of downstream users for high-quality chip products.

[0004] To improve the quality of polyester chip products, it is necessary to reduce the dust content in PET basic chips. Regarding patents on polyester chip synthesis and treatment such as CN101253215A, CN101479314B, CN102408548B, CN104501531B, CN204373315U, CN101392051B, CN206622398U, etc., they do not consider the problem that the ultrafine powders generated during the actual production process of the chips are difficult to remove due to electrostatic adsorption, which is not conducive to obtaining uniform and high-quality chip particle products. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a device that reduces the content of ultrafine dust in the slice particles during the production process of polyester chips and improves the product quality. The device of the present invention eliminates the static charges carried on the surface of the slice particles in the pneumatic conveying pipeline, eliminates the adsorption effect of the base slice particles on the ultrafine dust due to static electricity, realizes the desorption of the ultrafine dust from the particle surface, removes the desorbed powder, reduces the content of ultrafine dust in the slices before solid-phase polycondensation, and finally improves the solid-phase polycondensation effect and product quality.

[0006] The present invention adopts the following technical solutions:

[0007] A device for reducing the content of ultrafine dust in base slice particles, comprising a first pipeline powder electrostatic elimination system, a buffer bin, a dust separation system and a dust removal system. The first pipeline powder electrostatic elimination system is connected to the feed inlet of the buffer bin for monitoring and eliminating the surface static electricity of the base slice particles conveyed to the buffer bin through the pneumatic conveying pipeline. The discharge outlet of the buffer bin is connected to the feed inlet of the dust separation system, and the dust separation system is connected to the dust removal system.

[0008] In the above technical solution, the first pipeline powder electrostatic elimination system is installed at the front end of the feed inlet of the buffer bin for monitoring and eliminating the surface static electricity of the base slice particles conveyed to the buffer bin through the pneumatic conveying pipeline. The buffer bin is used for temporarily storing the base slices conveyed by the pneumatic conveying pipeline.

[0009] Further, the first pipeline powder electrostatic elimination system includes an electrostatic eliminator body and an electrostatic monitor body.

[0010] Further, the electrostatic eliminator body and the electrostatic monitor body are of the same diameter as the pneumatic conveying pipeline.

[0011] Further, the electrostatic eliminator body is a bipolar DC electrostatic eliminator; the electrostatic monitor body collects the electrostatic charge amount of the base slice particles in the pipeline and is used to adjust the output parameters of the bipolar high-voltage power supply of the electrostatic eliminator body.

[0012] In the above technical solution, the first pipeline powder electrostatic elimination system includes an electrostatic eliminator body and an electrostatic monitor body. The electrostatic eliminator body and the electrostatic monitor body are of the same diameter as the pneumatic conveying pipeline. Among them, the electrostatic monitor collects the electrostatic charge amount of the powder in the pipeline and adjusts the charge elimination efficiency of the bipolar DC electrostatic eliminator to control the material static electricity in the pipeline at a low level.

[0013] Further, a rotary feeder is provided between the discharge outlet of the buffer bin and the feed inlet of the dust separation system for conveying the base slices in the buffer bin to the dust separation system.

[0014] In the above technical solution, the rotary feeder is installed near the discharge opening of the buffer bin. The basic slices in the buffer bin are conveyed to the next dust separation system through the rotary feeder, and the slices are conveyed from top to bottom by gravity. The produced basic slices are conveyed through a pneumatic conveying pipeline, and after the static electricity is eliminated by the first pipeline static eliminator system, they are temporarily stored in the buffer bin. The dust-containing basic slice particles in the buffer bin enter the dust separation system through the rotary feeder by gravity.

[0015] Further, the dust separation system includes a second pipeline powder static eliminator system, a dust separation cavity, and a fan system.

[0016] Further, the second pipeline powder static eliminator system is connected to the feed inlet of the dust separation cavity to eliminate the static electricity of the conveyed basic slice particles again.

[0017] Further, the second pipeline powder static eliminator system includes an eliminator body. The diameter of the eliminator body is the same as the diameter of the conveying pipeline, and an AC high-voltage power supply is adopted to automatically eliminate the static electricity of the particles.

[0018] In the above technical solution, the basic slices carrying dust are further eliminated of the static electricity of the slice particles themselves through the second pipeline powder static eliminator system.

[0019] Further, a separation gas inlet is provided on the left side of the dust separation cavity, and a separation gas outlet is provided at the upper right part in the corresponding direction. The fan system is connected to the separation gas inlet, and the dust removal system is connected to the separation gas outlet.

[0020] Further, the fan system includes a fan, a gas purification device, a valve, and a pressure reducing valve.

[0021] Further, the fan system is connected to the dust separation cavity through a pipeline, and the air volume and pressure of the fan system are adjusted by the valve and the pressure reducing valve.

[0022] In the above technical solution, the fan system includes a fan, a gas purification device, a valve, and a pressure reducing valve. The compressed air generated by the fan system enters the dust separation cavity through the pipeline and the separation gas inlet after being purified and the pressure is adjusted by the pressure reducing valve.

[0023] Further, a particle dispersion column is provided in the dust separation cavity, and the particle dispersion column is fixed on the inner wall of the dust separation cavity through a support column.

[0024] Further, the dust removal system adopts a bag filter or a wet dust collector.

[0025] In the above technical solution, the dust-laden gas stream after being processed by the dust separation system enters the dust removal system, where the dust is separated and recovered. The dust removal system filters the dust in the dust-laden gas stream generated by the dust separation system to ensure that particles with a particle size of 10 μm or even smaller are filtered and recovered. The dust removal system described above can use a bag filter or a wet dust collector.

[0026] Furthermore, it also includes a solid-phase polycondensation device system, and the chip solid-phase polycondensation device system is connected to the outlet pipeline of the dust separation system.

[0027] In the above technical solution, the dust separation system includes a second pipeline powder electrostatic eliminator system, a dust separation chamber, and a fan system. The second powder electrostatic eliminator system is used to further eliminate the static electricity of the basic chip particles conveyed by the rotary feeder. The basic chips fall into the dust separation chamber, and the compressed air generated by the fan separates the large basic chip particles from the ultra-fine powder, and the small particle powder is conveyed to the dust removal system by the airflow. The outlet pipeline of the dust separation system is connected to the chip solid-phase polycondensation device system, and the large chip slices enter the next solid-phase polycondensation processing equipment through the outlet of the dust separation system. The basic chips after the ultra-fine dust desorption treatment are conveyed to the solid-phase polycondensation device system for high-temperature crystallization treatment.

[0028] The beneficial effects of the present invention are:

[0029] Utilize the first pipeline electrostatic eliminator system to eliminate the static electricity of the basic chip particles, and reduce the particle conveying speed in the pneumatic conveying system through the buffer bin; further automatically eliminate the static charge carried by the particles through the second pipeline electrostatic eliminator on the dust separation system, inhibit the adsorption of static electricity on the ultra-fine powder, and complete the separation of the ultra-fine dust and the large chip slices. The separated dust is recovered through the dust removal system to achieve the control of the ultra-fine dust content on the surface of the basic chips;

[0030] The present invention mainly includes a first pipeline powder electrostatic eliminator system, a buffer bin, a rotary feeder, a dust separation system, and a dust removal system. Among them, the dust separation system further includes a second pipeline powder electrostatic eliminator system, a dust separation chamber, and a fan system. The synthesized polyester basic chips enter the buffer bin through the first pipeline powder electrostatic eliminator system to achieve the elimination of the static electricity of the basic chips; the materials in the buffer bin enter the dust separation system through the static electricity rotary feeder and the second pipeline powder electrostatic eliminator system. The compressed air generated by the fan separates the chip particles from the ultra-fine dust after purification treatment. The dust-laden gas stream flows into the dust removal system to complete the desorption and collection of the ultra-fine powder on the surface of the chips, and thoroughly remove the ultra-fine powder between the basic chip pellets and adsorbed on the surface of the pellets;

[0031] The device for reducing the content of ultrafine dust in the basic slice particles proposed by the present invention is reasonably designed, can effectively improve the quality of the slice pellets, and is applicable to the polyester production device for producing high-quality slice products. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic structural diagram of the device for reducing the content of ultrafine dust in the basic slice particles;

[0033] Figure 2 Schematic structural diagram of the dust separation system;

[0034] Figure 3 Schematic diagram of the dust separation principle.

[0035] Among them, 1 is the first pipeline powder electrostatic eliminator system; 2 is the buffer bin; 3 is the rotary feeder; 4 is the dust separation system; 5 is the dust removal system; 401 is the feed pipeline; 402 is the second pipeline powder electrostatic eliminator system; 403 is the dust separation cavity; 404 is the fan system; 405 is the separation gas inlet; 406 is the separation gas outlet; 407 is the discharge port pipeline; 408 is the particle dispersion column. DETAILED DESCRIPTION OF THE INVENTION

[0036] The present invention will be specifically described below in conjunction with the accompanying drawings and specific embodiments:

[0037] Refer to Figure 1 , a device for reducing the content of ultrafine dust in the basic slice particles, including a first pipeline powder electrostatic eliminator system 1, a buffer bin 2, a dust separation system 4 and a dust removal system 5. The first pipeline powder electrostatic eliminator system 1 is connected to the feed inlet of the buffer bin 2 for monitoring and eliminating the surface static electricity of the basic slice particles transported to the buffer bin 2 through the pneumatic conveying pipeline; the discharge outlet of the buffer bin 2 is connected to the feed inlet of the dust separation system 4, and the dust separation system 4 is connected to the dust removal system 5.

[0038] The first pipeline powder electrostatic eliminator system 1 is installed at the front end of the feed inlet of the buffer bin 2 for monitoring and eliminating the surface static electricity of the basic slice particles transported to the buffer bin 2 through the pneumatic conveying pipeline; the buffer bin 2 is used for temporarily storing the basic slices transported by the pneumatic conveying pipeline.

[0039] As one of the embodiments, further, the first pipeline powder electrostatic eliminator system 1 includes an electrostatic eliminator body and an electrostatic monitor body.

[0040] As one of the embodiments, further, the electrostatic eliminator body and the electrostatic monitor body are of the same diameter as the pneumatic conveying pipeline.

[0041] As one of the embodiments, further, the static eliminator body is a bipolar DC static eliminator; the static monitor body collects the static charge amount of the basic slice particles in the pipeline and is used to adjust the output parameters of the bipolar high-voltage power supply of the static eliminator body.

[0042] The static monitor collects the static charge amount of the powder in the pipeline and adjusts the charge elimination efficiency of the bipolar DC static eliminator to control the static electricity of the materials in the pipeline at a relatively low level.

[0043] As one of the embodiments, further, a rotary feeder 3 is provided between the discharge port of the buffer silo 2 and the feed port of the dust separation system 4 for conveying the basic slices in the buffer silo 2 to the dust separation system 4.

[0044] The rotary feeder 3 is installed near the discharge port of the buffer silo 2, and the basic slices in the buffer silo 2 are conveyed to the next dust separation system 4 through the rotary feeder 3, where the slices are conveyed from top to bottom by gravity. The produced basic slices pass through the pneumatic conveying pipeline and are temporarily stored in the buffer silo 2 after the static electricity is eliminated by the first pipeline static elimination system 1. The dust-containing basic slice particles in the buffer silo 2 enter the dust separation system 4 through the rotary feeder 3 by gravity.

[0045] As one of the embodiments, refer to Figure 2 and Figure 3 , the dust separation system 4 includes a second pipeline powder static elimination system 402, a dust separation chamber 403 and a fan system 404.

[0046] As one of the embodiments, further, the basic slice particles enter the dust separation chamber 403 through the feed pipeline 401. The second pipeline powder static elimination system 402 is arranged on the feed pipeline 401 and is connected to the feed port of the dust separation chamber 403 for eliminating the static electricity of the conveyed basic slice particles again.

[0047] As one of the embodiments, further, the second pipeline powder static elimination system 402 includes an eliminator body. The diameter of the eliminator body is the same as the diameter of the conveying pipeline (feed pipeline 401), and an AC high-voltage power supply is adopted to realize the automatic elimination of the static electricity of the particles.

[0048] As one of the embodiments, further, a separation gas inlet 405 is provided on the left side of the dust separation chamber 403, and a separation gas outlet 406 is provided on the upper right side in the corresponding direction. The fan system 404 is connected to the separation gas inlet 405, and the dust removal system 5 is connected to the separation gas outlet 406.

[0049] As one of the embodiments, further, the fan system 404 includes a fan, a gas purification device, a valve, and a pressure reducing valve.

[0050] As one of the embodiments, further, the fan system 404 is connected to the dust separation cavity 403 through a pipeline, and the air volume and pressure of the fan system 404 are adjusted by a valve and a pressure reducing valve.

[0051] The fan system includes a fan, a gas purification device, a valve, and a pressure reducing valve. The compressed air generated by the fan system enters the dust separation cavity through a pipeline and a separation gas inlet after being purified and the pressure is adjusted by the pressure reducing valve.

[0052] As one of the embodiments, refer to Figure 3 , there are multiple separation gas inlets on the dust separation cavity 403, one is arranged on the right side of the dust separation cavity 403 (such as 405-1), and the others are arranged at other positions in the same horizontal direction (such as 405-2).

[0053] The fan system 404 can enter the purified compressed air into the dust separation cavity 403 through one or more separation gas inlets.

[0054] As one of the embodiments, further, a particle dispersion column 408 is provided in the dust separation cavity 403, and the particle dispersion column 408 is fixed on the inner wall of the dust separation cavity 403 through a support column.

[0055] As one of the embodiments, further, the dust removal system 5 adopts a bag filter or a wet dust collector.

[0056] As one of the embodiments, further, it further includes a solid-phase polycondensation device system, and the chip solid-phase polycondensation device system is connected to the discharge port of the dust separation system 4 through a pipeline.

[0057] Embodiment 1

[0058] Refer to Figure 1 , the device for reducing the content of ultrafine dust in the basic chip particles includes a first pipeline powder electrostatic elimination system 1, a buffer bin 2, a rotary feeder 3, a dust separation system 4, and a dust removal system 5. In this embodiment, the polyester basic chips are transported to the front of the solid-phase polycondensation device through a pneumatic conveying pipeline. During the high-speed transportation of the chips in the pipeline, a large amount of dust is carried and highly charged. The charged basic chips in the pneumatic conveying pipeline enter the buffer bin 2 through the first pipeline powder electrostatic elimination system 1 and are stored in the buffer bin 2.

[0059] The first pipeline powder electrostatic elimination system 1 is installed at the feeding port of the buffer silo 2. It adopts DC-type static elimination technology to neutralize the static electricity of the materials in the pipeline by generating ion wind. The first pipeline powder electrostatic elimination system 1 detects the static electricity quantity of the base chips through a self-equipped static monitor and adjusts the static eliminator's static elimination parameters in a timely manner. Moreover, the entire electrostatic elimination system adopts remote online detection and control. Among them, the static eliminator can use compressed air or nitrogen as the positive pressure protection gas, and the air source pressure is not less than 0.6 MPa.

[0060] The base chips stored in the buffer silo 2 move by gravity and are conveyed to the dust separation system 4 through the rotary feeder 3 installed on the pipeline at the discharging port of the buffer silo 2. In the dust separation system, the ultrafine powder is separated from the large particles of the base particles, and the dust-containing air flow is separated from the dust through the dust removal system 5. The base chip particles from which the ultrafine dust has been removed enter the next-stage slice solid-phase polycondensation device through the discharging port pipeline 407 of the dust separation system 4.

[0061] Example 2

[0062] Combined Figure 2 , this embodiment is further described. The static electricity charge of the base chips stored in the buffer silo 2 is relatively small, but the powder in the chips has not been removed. The base chips pass through the rotary feeder 3, the feeding pipe 401 of the dust separation system, and the second pipeline powder electrostatic elimination system 402 and enter the dust separation chamber 403 of the dust separation system 4. The second powder electrostatic elimination system 402 further eliminates the static electricity of the base chip particles conveyed from the rotary feeder 3, and the base chips fall into the dust separation chamber 403; the compressed air generated by the fan 404 enters the dust separation chamber 403 through the separation gas inlet 405, separates the large-particle base chips from the ultrafine powder, and conveys the small-particle powder to the dust removal system 5 through the separation gas inlet 406 of the dust separation system 4 by the action of the air flow. The large-particle chips enter the next solid-phase polycondensation processing equipment through the discharging port 407 of the dust separation system.

[0063] The second pipeline powder electrostatic elimination system 402 only includes the eliminator body and its ion wind control system. The diameter of the eliminator body is the same as the diameter of the conveying pipeline, and it adopts an AC-type high-voltage power supply to realize the automatic elimination of the static electricity of the particles.

[0064] The fan system 404 is connected to the dust separation chamber 403 through a pipeline. Its air volume and pressure are adjusted through valves and pressure reducing valves. The specific air volume and pressure need to be adjusted on-site according to the particle size, bulk density, conveying volume of the chips to be processed, and the size of the powder cavity. The fan system 404 is equipped with a compressed air purification device. The fan system 404 enters the purified compressed air into the dust separation chamber 403 through the separation gas inlet 405.

[0065] Inside the dust separation chamber 403, there is a particle dispersion column 408, which disperses and separates the basic slices and powders entering the dust separation chamber 403. The dispersion column 409 is fixed on the separation chamber wall through support columns.

[0066] The discharge port pipeline 407 of the dust separation chamber 403 is connected to the slice solid-phase polycondensation device system, and transports the basic slices after ultrafine dust desorption treatment to the solid-phase polycondensation device system for high-temperature crystallization treatment.

[0067] Example 3

[0068] Combined with Figure 2 , this embodiment is further described. The electrostatic charge of the basic slices stored in the buffer bin 2 is relatively small, but the powders in the slices have not been removed. The basic slices pass through the rotary feeder 3, the feed pipe 401 of the dust separation system, and the second pipeline powder electrostatic elimination system 402 and enter the dust separation chamber 403 of the dust separation system 4. The second powder electrostatic elimination system 402 further eliminates the static electricity of the basic slice particles conveyed from the rotary feeder 3, and the basic slices fall into the dust separation cavity 403; the compressed air generated by the fan 404 enters the dust separation chamber 403 through the separation gas inlet 405, separates the large particle basic slices from the ultrafine powders, and conveys the small particle powders to the dust removal system 5 through the separation gas inlet 406 of the dust separation system 4 by the airflow action. The large particle slices enter the next solid-phase polycondensation treatment equipment through the discharge port 407 of the dust separation system.

[0069] The second pipeline powder electrostatic elimination system 402 only includes an eliminator body and its ion wind control system. The diameter of the eliminator body is the same as the diameter of the conveying pipeline, and an AC-type high-voltage power supply is adopted to realize the automatic elimination of particle static electricity.

[0070] The fan system 404 is connected to the dust separation chamber 403 through a pipeline, and its air volume and pressure are adjusted by valves and pressure reducing valves. The specific air volume and pressure need to be adjusted on-site according to the particle size, bulk density, conveying volume of the slices to be processed, and the size of the powder cavity. The fan system 404 is equipped with a compressed air purification device by itself. The fan system 404 can enter the purified compressed air into the dust separation chamber 403 through multiple separation gas inlets 405 (as Figure 3 shown).

[0071] Inside the dust separation chamber 403, there is a particle dispersion column 408, which disperses and separates the basic slices and powders entering the dust separation chamber 403. The dispersion column 409 is fixed on the separation chamber wall through support columns. The directions of the slice particles, compressed air, and dust-containing airflow inside the dust separation chamber 403 are as Figure 3 shown.

[0072] The discharge port pipeline 407 of the dust separation chamber 403 is connected to the slice solid-phase polycondensation device system, and the base slice after the ultrafine dust desorption treatment is transported to the solid-phase polycondensation device system for high-temperature crystallization treatment.

[0073] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A device for reducing the content of ultrafine dust in basic slice particles, characterized in that, it includes a first pipeline powder electrostatic eliminator system, a buffer silo, a dust separation system and a dust removal system. The first pipeline powder electrostatic eliminator system is connected to the feed inlet of the buffer silo to monitor and eliminate the surface static electricity of the basic slice particles transported to the buffer silo through the pneumatic conveying pipeline. The discharge outlet of the buffer silo is connected to the feed inlet of the dust separation system, and the dust separation system is connected to the dust removal system; the dust separation system includes a second pipeline powder electrostatic eliminator system, a dust separation cavity and a fan system; the second pipeline powder electrostatic eliminator system is connected to the feed inlet of the dust separation cavity to eliminate the static electricity of the transported basic slice particles again; a separation gas inlet is provided on the left side of the dust separation cavity, and a separation gas outlet is provided at the upper right part in the corresponding direction. The fan system is connected to the separation gas inlet, and the dust removal system is connected to the separation gas outlet; a particle dispersion column is provided in the dust separation cavity, and the particle dispersion column is fixed on the inner wall of the dust separation cavity through a support column.

2. The device for reducing the content of ultrafine dust in basic slice particles according to claim 1, characterized in that, the first pipeline powder electrostatic eliminator system includes an electrostatic eliminator body and an electrostatic monitor body.

3. The device for reducing the content of ultrafine dust in basic slice particles according to claim 2, characterized in that, the electrostatic eliminator body and the electrostatic monitor body have the same diameter as the pneumatic conveying pipeline.

4. The device for reducing the content of ultrafine dust in basic slice particles according to claim 3, characterized in that, the electrostatic eliminator body is a bipolar DC electrostatic eliminator; the electrostatic monitor body collects the electrostatic charge amount of the basic slice particles in the pipeline and is used to adjust the output parameters of the bipolar high-voltage power supply of the electrostatic eliminator body.

5. The device for reducing the content of ultrafine dust in basic slice particles according to claim 1, characterized in that, a rotary feeder is provided between the discharge outlet of the buffer silo and the feed inlet of the dust separation system to transport the basic slices in the buffer silo to the dust separation system.

6. The device for reducing the content of ultrafine dust in basic slice particles according to claim 1, characterized in that, the second pipeline powder electrostatic eliminator system includes an eliminator body. The diameter of the eliminator body is the same as the diameter of the conveying pipeline, and an AC type high-voltage power supply is adopted to realize the automatic elimination of particle static electricity.

7. The device for reducing the content of ultrafine dust in basic slice particles according to claim 1, characterized in that, the fan system includes a fan, a gas purification device, a valve and a pressure reducing valve.

8. The device for reducing the content of ultrafine dust in basic slice particles according to claim 7, characterized in that, the fan system is connected to the dust separation cavity through a pipeline, and the air volume and pressure of the fan system are adjusted through the valve and the pressure reducing valve.

9. The device for reducing the content of ultrafine dust in basic slice particles according to claim 1, characterized in that, The dust removal system uses a bag filter or a wet dust collector.

10. An apparatus for reducing the content of ultrafine dust in base chips, according to claim 1, characterized in that, it further includes a solid phase polycondensation device system, and the chip solid phase polycondensation device system is connected to the outlet pipe of the dust separation system.

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