Ultrahigh-purity polymer purification and homogenization treatment device and process

Abstract

The invention relates to an ultra-high-purity polymer purifying and homogenizing treatment device and process. The device comprises a purifying, screening and demagnetizing unit and a circulating homogenizing and demagnetizing unit arranged at the downstream, the purifying, screening and demagnetizing unit comprises a purifying bin, a vibrating screen and an automatic demagnetizing device which are connected in sequence; the circulating homogenizing demagnetizing unit comprises a homogenizing stock bin, a discharge port of the homogenizing stock bin is connected with an automatic demagnetizing device, the discharge end of the automatic demagnetizing device is provided with two branch pipes, and the two branch pipes comprise a qualified material output branch and a finished product collecting unit, and the tail end of the qualified material output branch is connected with the finished product collecting unit; and the circulating branch is communicated with the homogenizing stock bin through a material returning pipeline and is used for returning the substandard materials to the homogenizing stock bin for secondary homogenizing and demagnetizing treatment. Compared with the prior art, the method disclosed by the invention realizes efficient, continuous and clean industrial production, and is suitable for large-scale production of high-end polyolefin products such as ultra-clean high-purity polyethylene.

Description

Technical Field

[0001] The present invention belongs to the field of ultra-high purity polymers, and particularly relates to an ultra-high purity polymer purification and homogenization treatment device and process. Background Art

[0002] Ultra-high purity polymers are a type of special polymer material with metal ion content lower than 1 ppm and non-volatile residue ≤ 0.01%. Taking high-purity polyethylene as an example, as the core membrane material for ultra-pure water systems in semiconductor manufacturing, it needs to meet the stringent requirements of extremely low total amounts of 12 metals such as Na, Fe, Cr, etc. in ASTM D4326 standard, which directly affects the resistivity of ultra-pure water (≥ 18.2 MΩ·cm) and the operating life of the system. However, the existing production processes have the following technical bottlenecks: (1) Catalyst residue: Metal-containing catalysts such as Ziegler-Natta and metallocene (such as Ti, Zr, Cr) form non-combustible metal ash after the polymerization reaction, and conventional deashing processes are difficult to reduce the residue amount to the semiconductor-grade requirements; (2) Equipment contamination: Dynamic equipment such as metal reaction kettles (such as 316L stainless steel) and screw extruders in continuous production generate sub-micron metal chips such as Fe and Ni under high-temperature and high-shear conditions; (3) Purification defects: Traditional vibrating sieving (mesh number ≤ 400 meshes) cannot effectively intercept metal particles with particle size < 38 μm, and the removal rate of electrostatic precipitation for non-magnetic metals (such as Al, Cu) is less than 60%; (4) Insufficient homogenization: Purity fluctuations between batches lead to performance differences in end products. For example, the pore blockage rate deviation of medical filter materials is > 15%, and the yield of chip manufacturing drops by 2 - 3 orders of magnitude.

[0003] Especially for high-end application fields such as medical implants (ISO10993 standard) and semiconductor photoresist carriers (SEMIF57 standard), problems such as dielectric loss (tanδ > 0.001) and catalytic side reactions caused by metal impurities in polymers produced by existing technologies have severely restricted industrial upgrading. Therefore, developing a production system with both deep demagnetization and dynamic homogenization functions has become the key to breaking through technical barriers. Summary of the Invention

[0004] The purpose of the present invention is to provide an ultra-high purity polymer purification and homogenization treatment device and process to solve the above problems.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] An ultra-high purity polymer purification and homogenization treatment device includes a purification screening and demagnetization unit and a circulating homogenization and demagnetization unit arranged downstream.

[0007] The purification screening and demagnetization unit includes a purification bin, a vibrating screen, and an automatic demagnetizer connected in sequence.

[0008] The cycle homogenization and demagnetization unit includes a homogenization bin, the discharge port of which is connected to an automatic demagnetizer. The discharge end of the automatic demagnetizer is divided into two branch pipes, including:

[0009] A qualified material output branch, the end of which is connected to the finished product collection unit; and

[0010] A cycle branch, which is connected to the homogenization bin through a return pipe for returning the unqualified materials to the homogenization bin for re-homogenization and demagnetization treatment.

[0011] As a preferred technical solution of the present invention, a dust collector is provided on the top of the purification bin. The discharge pipeline thereof is sequentially provided with a rotary valve, an electrostatic monitoring and elimination mechanism, and a vibrating screen. The qualified discharge end of the vibrating screen is connected to the automatic demagnetizer.

[0012] As a preferred technical solution of the present invention, a buffer hopper is provided between the purification screening and demagnetization unit and the cycle homogenization and demagnetization unit, and a dust collector is installed on the top of the buffer hopper.

[0013] As a preferred technical solution of the present invention, a dust collector is provided on the top of the homogenization bin. The discharge pipeline thereof is sequentially provided with a rotary valve, an automatic demagnetizer, and a reversing valve. The first outlet of the reversing valve is connected to the qualified material output branch, and the second outlet is connected to the cycle branch.

[0014] As a preferred technical solution of the present invention, the automatic demagnetizer includes:

[0015] A cavity, the interior of which is divided into a demagnetization area and a cleaning area, and a clean material cavity and a slag material cavity are correspondingly provided at the bottom;

[0016] Multi-layer movable drawers, each layer of drawer includes an outer panel, an inner panel and a magnetic bar extending into the cavity, and the magnetic bar is arranged between the outer panel and the inner panel;

[0017] Driving components, symmetrically arranged on both sides of the advancing direction of the drawer for driving the movable drawer to move;

[0018] Scraper parts, fixedly arranged on the inner wall of the cavity in the demagnetization area.

[0019] As a preferred technical solution of the present invention, the automatic demagnetizer adopts a vibrating pneumatic scraper type iron remover;

[0020] The driving component includes a cylinder, and the telescopic rod of the cylinder is connected to the outer panel;

[0021] A vibrator is provided in the cavity of the automatic demagnetizer, and the vibrator is fixedly installed on the side wall of the cavity in the cleaning area.

[0022] As a preferred technical solution of the present invention, the magnetic rods are arranged in layers in a manner that the magnetic intensity gradient increases from top to bottom, the magnetic field intensity difference between adjacent layers is controlled within 200 - 500 Gs, the magnetic rods in adjacent layers are arranged staggeredly, and each layer of magnetic rods is installed between the inner panel and the outer panel through bearings.

[0023] As a preferred technical solution of the present invention, the number of the purification screening and demagnetization units is 1 or more in parallel; at least two discharge pipelines with vibrating screens and automatic demagnetizers are arranged in parallel at the discharge end of the purification bin;

[0024] The number of the circulation homogenization and demagnetization units is 2 - 10, and the feed pipelines of multiple homogenization bins are connected in parallel to the upstream conveying system, and the discharge pipelines are connected in parallel to the downstream conveying system.

[0025] As a preferred technical solution of the present invention, the homogenization bin is a gravity homogenization bin, and a blending bottom cone is provided at the bottom. The blending bottom cone includes:

[0026] A central discharge pipe, which is vertically arranged at the center of the inner cavity of the blending bottom cone;

[0027] Partition plates, which are radially distributed around the central discharge pipe to form multiple independent flow channels;

[0028] A conical shell, which is connected to the bottom of the homogenization bin and forms an outer channel between the outer wall of the homogenization bin.

[0029] As a preferred technical solution of the present invention, a sampling port or an on - line magnetic induction detector is provided on the circulation branch; or, a sampling port or an on - line magnetic induction detector is provided on the pipeline at the discharge end of the automatic demagnetizer. For example, when the on - line magnetic induction detector measures that the magnetic content of the material is unqualified, the PLC controls the change - over valve to switch to the circulation branch.

[0030] As a preferred technical solution of the present invention, the system conveys materials through a pneumatic conveying system or an air - delivery unit. The working pressure of the pneumatic conveying system is 0.03 - 0.09 MPa, and the conveying wind speed is 18 - 25 m / s.

[0031] An ultra - high - purity polymer purification and homogenization process, using the above - mentioned device, includes:

[0032] The materials are successively removed of residual solvents, residual monomers, and VOCs through the purification screening and demagnetization unit, and are screened and preliminarily demagnetized;

[0033] The processed materials enter the circulation homogenization and demagnetization unit, where they are circulated, homogenized, and demagnetized until they meet the standards and are then output.

[0034] The specific process is as follows: The materials from the upstream process are transported to the purification screening and demagnetization unit, and the residual solvents, residual monomers, and VOCs are removed in the purification bin in sequence, screened by the vibrating screen, and demagnetized once by the automatic demagnetizer; the materials processed by the purification screening and demagnetization unit are transported to the circulating homogenization and demagnetization unit, and circulated and homogenized for demagnetization in the homogenization bin and by the automatic demagnetizer until reaching the qualified standard and discharged through the qualified material output branch.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. Deep demagnetization and purification: Through the multi-stage linkage (vibrating screen + gradient magnetic field demagnetizer) of the purification screening unit, efficient interception of metal impurities is achieved, and the contents of magnetic metals such as Fe and Cr in the polymer can be effectively reduced to meet the total metal requirements of semiconductor-grade materials.

[0037] 2. Dynamic homogenization guarantee: The circulating homogenization unit adopts a design of blending bottom cone (radial shunt + outer channel) and multi-bin parallel connection, so that the ash difference between batches < 3%, and the fluctuation of the pore blockage rate ≤ 2%, meeting the strict requirements of high standards for the product of the material.

[0038] 3. Strong process compatibility: The modular design supports the parallel operation of 1 - 10 homogenization bins, adapts to different production capacity requirements, and the purification unit can be extended to multi-stage series connection, with low dielectric loss of the end product. Description of the Drawings

[0039] Figure 1 It is a schematic diagram of the purification and homogenization treatment device of the present invention;

[0040] Figure 2 It is a front view structural schematic diagram of the automatic demagnetizer;

[0041] Figure 3 It is a side view structural schematic diagram of the automatic demagnetizer;

[0042] Figure 4 It is a structural schematic diagram of the gravity homogenization bin;

[0043] Figure 5 It is a structural schematic diagram of a blending bottom cone;

[0044] Figure 6 It is a schematic diagram of the material blending principle;

[0045] In the figure: 100 - homogenizing bin; 101 - blending bottom cone; 1011 - central feeding pipe; 1012 - flow channel; 1013 - conical shell; 200 - automatic demagnetizer; 201 - cavity; 202 - cylinder; 203 - clean material chamber; 204 - slag material chamber; 205 - outer panel; 206 - magnetic bar; 300 - rotary valve; 400 - dust collector; 500 - reversing valve; 600 - buffer hopper; 700 - purified material bin; 800 - electrostatic monitoring and elimination mechanism; 900 - vibrating screen. Specific implementation mode

[0046] The present invention will be described in detail below with reference to the accompanying drawings of the specification. Those technical solutions that are not described in detail in the present invention are all publicly known in the art.

[0047] Figure 1 It is a schematic diagram of a purification and homogenization treatment device of the present invention, including an upstream purification, screening and demagnetization unit and a downstream circulating homogenization and demagnetization unit. A buffer hopper 600 is provided between the purification, screening and demagnetization unit and the circulating homogenization and demagnetization unit, and a dust collector 400 is installed at the top of the buffer hopper 600.

[0048] Among them, the purification, screening and demagnetization unit includes a purified material bin 700, a rotary valve 300, an electrostatic monitoring and elimination mechanism 800 and a vibrating screen 900 connected in sequence. The qualified discharge end of the vibrating screen 900 is connected to an automatic demagnetizer 200, and a dust collector 400 is provided at the top of the purified material bin 700. At least two discharge pipelines with a vibrating screen 900 and an automatic demagnetizer 200 are arranged in parallel at the discharge end of the purified material bin 700. The electrostatic monitoring and elimination mechanism 800 includes an electrostatic monitoring unit and an electrostatic elimination unit, which are used to eliminate the static electricity generated in the material and ensure the safety of production.

[0049] The circulating homogenization and demagnetization unit includes a homogenizing bin 100. A rotary valve 300 is installed at the discharge port of the homogenizing bin 100. An automatic demagnetizer 200 is arranged downstream of the rotary valve 300, and a reversing valve 500 is arranged downstream of the automatic demagnetizer 200. The reversing valve 500 is provided with two branch pipes: including a qualified material output branch, the end of which is connected to a finished product collection unit; and a circulating branch, which is communicated with the homogenizing bin 100 through a return pipeline and is used to return the unqualified materials to the homogenizing bin 100 for re-homogenization and demagnetization treatment.

[0050] During operation, materials (such as polyethylene powder) are transported through a pneumatic conveying system or a pneumatic conveying unit (such as positive pressure nitrogen conveying). The materials from the upstream process are sent to the purification, screening, and demagnetization unit. Hot nitrogen containing a small amount of steam is introduced into the purification silo 700 to degas the materials in the purification silo 700. After being purified by the purification silo 700, impurities such as residual solvents, monomers, and VOCs in the materials are effectively removed. The purification silo 700 helps improve the quality of the powder product and the operation safety of the subsequent system. By introducing wet nitrogen containing a small amount of steam into the silo, a small amount of residual hydrocarbon components in the powder are removed (reducing the hexane content to 0.1%), avoiding the influence of residual solvents on the product quality, and at the same time deactivating the residual catalyst. Then, the materials of appropriate size are obtained through screening by the vibrating screen 900 (unqualified materials are collected and processed separately), and preliminary demagnetization is carried out by the automatic demagnetizer 200.

[0051] The materials processed by the purification, screening, and demagnetization unit are sent to the circulation, homogenization, and demagnetization unit. Through the homogenization silo 100 and the automatic demagnetizer 200, circulation, homogenization, and demagnetization are carried out. According to the cleanliness requirements, by controlling the reversing valve 500, the circulation treatment of the materials is realized. The materials are continuously circulated between the homogenization silo and the circulation branch, and demagnetization is carried out through the automatic demagnetizer 200. A dust collector 400 is arranged at the top of the homogenization silo 100, and the pneumatically conveyed gas is discharged from the homogenization silo after being filtered by the dust collector 400. After several cycles, the powder is homogenized. At the same time, the magnetic metal impurities in the powder reach the ultra-clean standard after multiple demagnetizations (a sampling port or an on-line magnetic induction detector is set on the circulation branch, or a sampling port or an on-line magnetic induction detector is arranged on the pipeline at the discharge end of the automatic demagnetizer. When the measured magnetic content of the materials does not meet the standard, the PLC or DCS controls the reversing valve to switch to the circulation branch until the product meets the standard). After the circulation and demagnetization are completed, by controlling the reversing valve 500, the circulation branch is closed, and the qualified material output branch is opened. The qualified product is discharged and sent to the finished product collection unit or the packaging unit.

[0052] As a preferred embodiment of the present invention, the purification, screening, and demagnetization unit and the circulation, homogenization, and demagnetization unit can be arranged in multiple groups in parallel, for example, 2 to 10 groups are set, specifically set according to actual needs, and selectively opened during operation. For example, Figure 1 shows a circulation, homogenization, and demagnetization unit composed of 6 groups of homogenization silos arranged in parallel. The homogenization silos arranged in parallel, on the one hand, have a sufficiently large buffer space, increasing the processing capacity of the system; on the other hand, it can realize the blending of materials between the silos, improving flexibility and increasing the uniformity of the materials.

[0053] As a preferred embodiment of the present invention, the automatic demagnetizer 200 adopts a vibrating pneumatic scraper demagnetizer, and the structural schematic diagram is as Figure 2 、 Figure 3As shown in the figure, the automatic demagnetizer 200 includes a cavity 201. The cavity is provided with multiple layers of movable drawers from top to bottom. The drawer includes an outer panel 205 located outside the cavity 201 and an inner panel (not shown in the figure) located inside the cavity 201. A number of magnetic rods 206 extending into the cavity 201 are evenly arranged horizontally on the outer panel 205. The ends of the magnetic rods 206 are fixedly installed with the inner panel. From top to bottom, the cavity 201 is divided into a demagnetization area and a cleaning area. Correspondingly, a clean material chamber 203 and a slag material chamber 204 communicating with the demagnetization area and the cleaning area are respectively provided at the lower part of the cavity 201, and clean materials and slag materials are discharged respectively.

[0054] Furthermore, the outer panel 205 is connected to a driving component. As a preferred implementation manner, a cylinder 202 can be used. The telescopic rod of the cylinder 202 is connected to the outer panel 205, and the cylinders 202 are symmetrically installed on both sides of the outer panel 205. Driven by the cylinder, the outer panel 205 together with the magnetic rod assembly is moved outwards. The specific working principle of the automatic demagnetizer 200 is as follows: The materials coming from the upstream enter the cleaning area of the cavity 201 through the feed port. During the falling process of the materials, they pass through each magnetic rod 206, and the metal magnetic impurities in the materials are intercepted and adsorbed by each magnetic rod 206. The clean materials fall into the clean material chamber 203 of the cavity 201 and are discharged. A scraping member is provided on the inner wall of the cavity 201 in the demagnetization area. The scraping member is arranged through each magnetic rod 206. When the magnetic rod 206 is pushed out, the scraping member scrapes off the metal magnetic impurities adsorbed on the surface of the magnetic rod. The metal magnetic impurities fall into the demagnetization area of the cavity 201 to achieve automatic cleaning, and the metal magnetic impurities are discharged through the slag material chamber 204.

[0055] As a preferred implementation manner, the cavity is provided with 2 - 10 layers of movable drawers from top to bottom. More preferably, 4 - 10 layers of movable drawers are provided. Figure 2 The figure shows a schematic diagram of setting 4 layers of movable drawers. The adjacent upper and lower magnetic rods 206 are arranged staggeredly to achieve better demagnetization. As a further preferred implementation manner, the magnetic rods 206 are installed between the inner and outer panels through bearings, and the magnetic rods 206 can roll. When the materials fall, the rolling magnetic rods 206 can evenly adsorb magnetic materials on the surface, and can adsorb more metal magnetic impurities.

[0056] As a preferred embodiment, from top to bottom, the magnetic force of each layer of magnetic bar assemblies increases successively and is arranged in a gradient. This gradient-set magnetic bar assembly can better exert the demagnetization effect. Because along the material flow direction, the content of magnetic impurities in the material will decrease successively. In order to better demagnetize and evenly exert the role of each magnetic bar, and to avoid material blockage caused by the upper magnetic bar being adsorbed saturated or adhering too many impurities, the magnetic force of the upper magnetic bar can be weaker, while that of the lower part increases successively, so as to achieve a better demagnetization effect. For example, in a preferred embodiment of the present invention, four layers of magnetic bar assemblies are arranged successively up and down. The outer tube surface magnetic of the first layer of magnetic bar is 9000 - 10000 GS, the outer tube surface magnetic of the second layer of magnetic bar is 10000 - 11000 GS, the outer tube surface magnetic of the third layer of magnetic bar is 11000 - 12000 GS, and the outer tube surface magnetic of the fourth layer of magnetic bar is 12000 - 13000 GS. Each layer of magnetic bar independently performs the magnetic cleaning action to achieve large-scale continuous on-line cleaning.

[0057] As a preferred embodiment, a vibrator is arranged in the automatic demagnetizer 200. When each layer of magnetic bar performs the cleaning action, the vibrator vibrates to shake off the materials accumulated on the surface of the magnetic bar or adsorbed by the magnetic bar, and then the materials are automatically cleaned by the scraper assembly. In addition, vibration also helps to prevent the powder from bridging and blocking in the equipment.

[0058] The homogenizing silo of the present invention is an important equipment for realizing material homogenization and blending. As a preferred technical solution, the homogenizing silo of the present invention adopts a gravity homogenizing silo, which relies on gravity blending to homogenize the product performance and stabilize the quality of polyolefin powder. That is, while the powder flows out under the action of gravity, the powders of different layers are automatically mixed and homogenized. The structural schematic diagram of the gravity homogenizing silo adopted by the present invention is referred to Figure 4 、 Figure 5 , a blending bottom cone 101 is arranged at the bottom of the homogenizing silo 100. The blending bottom cone 101 can be detachably installed with the homogenizing silo 100. The blending bottom cone 101 includes a shell, a central feeding pipe 1011 is arranged at the center of the inner cavity of the shell, a partition plate is arranged outside the central feeding pipe 1011 and divides to form independent flow channels 1012. The lower part of the shell is a conical shell 1013, and an outer channel is formed between the conical shell 1013 and the homogenizing silo. This special flow channel form helps the materials to be homogenized and blended evenly. It is very suitable for the physical properties of polyethylene powder. By utilizing the full-flow form of the materials in the silo and relying on gravity flow, uniform mixing and homogenization are realized. In the special flow channel form in the structure of this blending bottom cone, the material flow channels at the bottom cone of the silo are separated to form multiple flow channels. In each channel, the materials flow into the discharging holes at the bottom by gravity flow at different velocities in different directions and at different heights. The materials at different heights in the silo enter the multiple channels of the blending bottom cone through the feeding holes at different heights and in different directions in the silo (refer to Figure 6) The uniformly mixed product is obtained in the mixing chamber at the bottom, and then through the automatic demagnetizer 200 and the external material circulation, the material homogenization and purification are realized.

[0059] For the existing homogenizing silos to process polyolefin powders (such as polyethylene powder), the air flow homogenization scheme is mostly adopted. However, there will be about 0.2 - 0.3% of material residue after each discharge, which needs to be cleaned. For the large-span grade adjustment, the silo needs to be emptied, and the cleaning period in the confined space is long (2 days). While the present invention adopts the above-mentioned gravity mixing scheme, there will be no residue during the mixing or grade switching between each silo, which is beneficial to achieve the ultra-high purity and product consistency of the material.

[0060] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention according to the disclosure of the present invention should be within the protection scope of the present invention.

Claims

1. An ultra-high purity polymer purification and homogenization treatment device, characterized in that: It includes a purification, screening and demagnetization unit and a circulating homogenization and demagnetization unit arranged downstream; The purification, screening and demagnetization unit comprises a purification silo (700), a vibrating screen (900) and an automatic demagnetizer (200) which are connected in sequence; The circulating homogenizing and demagnetizing unit comprises a homogenizing silo (100), the discharge port of which is connected to an automatic demagnetizer (200), and the discharge end of the automatic demagnetizer (200) is provided with two branch pipes, including: A qualified material output branch, the end of which is connected to a finished product collection unit; and The circulation branch is connected to the homogenizing silo (100) through a return pipeline, and is used to return substandard materials to the homogenizing silo (100) for further homogenization and demagnetization treatment.

2. The ultra-high purity polymer purification and homogenization treatment device according to claim 1, characterized in that: A dust collector (400) is provided on the top of the purification silo (700), and a rotary valve (300), a static electricity monitoring and elimination mechanism (800) and a vibrating screen (900) are sequentially provided on the discharge pipeline thereof, and a qualified discharge end of the vibrating screen (900) is connected to an automatic demagnetizer (200).

3. The ultra-high purity polymer purification and homogenization treatment device according to claim 2, characterized in that: A buffer hopper (600) is provided between the purification, screening and demagnetization unit and the circulating homogenization and demagnetization unit, and a dust collector (400) is installed on the top of the buffer hopper (600).

4. The ultra-high purity polymer purification and homogenization treatment device according to claim 1, characterized in that: A dust collector (400) is provided on the top of the homogenizing silo (100), and a rotary valve (300), an automatic demagnetizer (200) and a reversing valve (500) are sequentially provided on the discharge pipeline thereof; a first outlet of the reversing valve (500) is connected to a qualified material output branch, and a second outlet is connected to a circulation branch.

5. The ultra-high purity polymer purification and homogenization treatment device according to claim 1, characterized in that: The automatic demagnetizer (200) comprises: The cavity (201) is divided into a demagnetization area and a cleaning area, and a clean material cavity (203) and a slag cavity (204) are provided at the bottom thereof; A multi-layer movable drawer, each layer of the drawer comprises an outer panel (205), an inner panel and a magnetic bar (206) extending into the cavity (201), wherein the magnetic bar (206) is arranged between the outer panel (205) and the inner panel; A driving component, symmetrically arranged on both sides of the drawer's travel direction, for driving the drawer to move; A scraper member is fixedly arranged on the inner wall of the cavity (201) of the demagnetization zone.

6. The ultra-high purity polymer purification and homogenization treatment device according to claim 5, characterized in that: The automatic demagnetizer (200) adopts a vibration type pneumatic scraper iron remover; The driving component comprises a cylinder (202), and a telescopic rod of the cylinder (202) is connected to the outer panel (205); A vibrator is provided in the cavity (201) of the automatic demagnetizer (200), and the vibrator is fixedly mounted on the side wall of the cavity (201) of the cleaning area.

7. The ultra-high purity polymer purification and homogenization treatment device according to claim 5, characterized in that: The magnetic bars (206) are arranged in layers in a manner of increasing magnetic strength gradient from top to bottom, the magnetic bars (206) in adjacent layers are arranged in a staggered manner, and each layer of magnetic bars (206) is installed between the inner panel and the outer panel (205) via a bearing.

8. The ultra-high purity polymer purification and homogenization treatment device according to claim 1, characterized in that: The number of the purification, screening and demagnetization units is one or more arranged in parallel; At least two discharge pipelines with a vibrating screen (900) and an automatic demagnetizer (200) are arranged in parallel at the discharge end of the purification silo (700); The number of the circulating homogenizing and demagnetizing units is 2 to 10, the feed pipelines of the plurality of homogenizing silos (100) are connected in parallel to an upstream conveying system, and the discharge pipelines are connected in parallel to a downstream conveying system.

9. The ultra-high purity polymer purification and homogenization treatment device according to claim 1, characterized in that: The homogenizing silo (100) is a gravity homogenizing silo, and a mixing bottom cone (101) is provided at the bottom. The mixing bottom cone (101) comprises: A central feed pipe (1011) is vertically arranged at the center of the inner cavity of the mixing bottom cone (101); Separation plates are radially distributed around the central feeding pipe (1011) to form a plurality of independent flow channels (1012); The conical shell (1013) is connected to the bottom of the homogenizing silo (100) and forms an external channel with the outer wall of the homogenizing silo (100).

10. A purification and homogenization process for ultra-high purity polymers, characterized in that: The device according to any one of claims 1 to 9 comprises: The material is purified, screened and demagnetized by the demagnetization unit to remove residual solvents, residual monomers, VOCs, screened and preliminarily demagnetized; The processed materials enter the circulating homogenization and demagnetization unit for cyclic homogenization and demagnetization until they meet the standards and are output.

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