Environment-friendly grading device special for high-purity germanium powder

Abstract

The utility model discloses a special environment-friendly grading device for high-purity germanium powder, which comprises a frame, a feeding mechanism, a grading mechanism and a dedusting mechanism, the feeding mechanism, the grading mechanism and the dedusting mechanism are mounted on the frame, the feeding mechanism is connected with the grading mechanism through a conveying pipe, and the dedusting mechanism is connected with the grading mechanism through a conveying pipe. The grading mechanism is connected with the dust removal mechanism through a dust removal pipe; pTFE coatings are sprayed on the parts, in contact with germanium powder, of the feeding mechanism, the grading mechanism and the dust removal mechanism. By means of the design of the device, the product purity is guaranteed, it is avoided that germanium powder generates friction in the grading cavity and influences the purity of the germanium powder, and the ECTFE coatings in the grading cavity, the inner wall of the dust remover and the valve plate can improve the abrasion resistance, impact resistance and toughness of the device and reduce noise; and the collection efficiency of the dust remover can be more than 99.99% due to the PTFE film-coated filter material, so that the dust discharge is strictly and effectively controlled, the environmental pollution is completely eradicated, and the purity of the finished product material is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model discloses belong to germanium powder grading technical field, and specifically relates to a kind of special environmental protection grading device for high-purity germanium powder. BACKGROUND

[0002] High-purity germanium powder is screened in the screening process, due to the vibration of vibrating screen, the noise of equipment is big, and the dust of classification screening is flying, which causes the pollution of production site to be big, and the operator needs to wear noise-proof earphone, earplug and dust mask for operation, the operator is polluted by dust more, material loss is big, and direct recovery rate only reaches 97.6%, and due to the use of vibrating screen, there are metal components and nylon screen on the vibrating screen, the metal components contact with material, and the nylon wire enters material, which affects the purity of high-purity germanium powder.

[0003] Therefore, the paper proposes a kind of special environmental protection grading device for high-purity germanium powder. INVENTION CONTENTS

[0004] In order to solve the above problems, the utility model provides a kind of special environmental protection grading device for high-purity germanium powder, which controls the discharge of dust and prevents environmental pollution.

[0005] In order to achieve the above technical effects, the utility model is realized by the following technical schemes: a kind of special environmental protection grading device for high-purity germanium powder, including rack, feeding mechanism, grading mechanism, dust removal mechanism, the rack is installed with feeding mechanism, grading mechanism, dust removal mechanism, feeding mechanism is connected with grading mechanism by conveying pipe, grading mechanism is connected with dust removal mechanism by dust removal pipe, the feeding mechanism also includes germanium powder feed bin, screw feeder, and the screw feeder is installed below the germanium powder feed bin;The grading mechanism also includes grading wheel, grading cavity, germanium powder discharge pipe A, and the grading wheel is installed at the top of the grading cavity, and the germanium powder discharge pipe is installed at the bottom of the grading cavity, and the conveying pipe is connected between the screw feeder and the lower side of the grading cavity;The dust removal mechanism also includes dust collector and germanium powder discharge pipe B, and the dust collector is connected with the dust outlet of the grading cavity by the dust removal pipe in the middle part, and the germanium powder discharge pipe B is installed at the bottom of the dust collector;The contact part of the feeding mechanism, grading mechanism and dust removal mechanism with germanium powder is sprayed with PTFE coating;The filter material in the dust collector 12 is PTFE membrane filter material.

[0006] As preferred, ECTFE coating of 0.4~0.7mm is sprayed on the inner wall of the grading cavity and the dust collector.

[0007] As preferred, the feed bin is welded by 5~7mm high-purity pp material bin plate.

[0008] As preferred, the grading wheel and the grading cavity are provided with full ceramic structure.

[0009] Preferably, the inlet and outlet of the germanium powder discharge pipe A and the germanium powder discharge pipe B are provided with high air-tightness unloading pneumatic expansion butterfly valves.

[0010] Preferably, the valve plate of the high air-tightness unloading pneumatic expansion butterfly valve is sprayed with an ECTFE coating of 0.4-0.7 mm.

[0011] Preferably, the germanium powder discharge pipe A and the germanium powder discharge pipe B are made of 5-7 mm high-purity pp material.

[0012] The germanium powder grading device has the following beneficial effects:

[0013] The design of the device ensures product purity and avoids friction between germanium powder and the interior of the grading cavity during grading, which affects the purity. The grading wheel and the grading cavity made of all-ceramic structure reduce iron, nickel and zinc pollution. The ECTFE coating sprayed on the inner wall of the grading cavity, the dust collector and the valve plate can improve the wear resistance, impact resistance and toughness of the device, reduce noise, and the PTFE coating sprayed on all structures in contact with germanium powder, including fixing screws and bearings, ensures that the device is not chemically corroded by chloride ions in the material and ensures product purity. The PTFE film filter material can make the collection efficiency of the dust collector greater than 99.99%, effectively control the emission of dust, prevent environmental pollution, and greatly improve the purity of finished materials. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed for the embodiment description. Those skilled in the art can also obtain other drawings based on these drawings without creative labor.

[0015] Fig. 1 The drawings are schematic structural diagrams of the present application.

[0016] Fig. 2 The drawings are schematic structural diagrams of the present application.

[0017] In the drawings, the components represented by each reference numeral are listed as follows:

[0018] 1, rack; 2, feeding mechanism; 3, grading mechanism; 4, dust removal mechanism; 5, material conveying pipe; 6, dust removal pipe; 7, germanium powder feeding bin; 8, screw feeder; 9, grading wheel; 10, grading cavity; 11, germanium powder discharge pipe A; 12, dust collector; 13, germanium powder discharge pipe B; 14, ECTFE coating; 15, high air-tightness unloading pneumatic expansion butterfly valve. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] As Figs. 1-2 shown in the prior art in the embodiment, the inventor finds that high-purity germanium powder is screened in the screening process, the vibration screen vibrates greatly, the equipment noise is loud, the dust flying in the classification screening causes great pollution in the production site, the operator needs to wear noise-proof earphones, earplugs and dust masks for operation, the operator is greatly polluted by the dust, the material loss is great, the direct yield only reaches 97.6%, and because the vibration screen is provided with metal components and nylon screen meshes, the metal components contact the material, and the nylon wires enter the material and affect the purity of the high-purity germanium powder.

[0021] Therefore, the inventor provides a special environmental protection classification device for high-purity germanium powder, which comprises a rack 1, a feeding mechanism 2, a classification mechanism 3 and a dust removal mechanism 4, the feeding mechanism 2, the classification mechanism 3 and the dust removal mechanism 4 are installed on the rack 1, the feeding mechanism 2 is connected with the classification mechanism 3 through a feeding pipe 5, the classification mechanism 3 is connected with the dust removal mechanism 4 through a dust removal pipe 6, the feeding mechanism 2 further comprises a germanium powder feeding bin 7 and a screw feeder 8, the screw feeder 8 is installed below the germanium powder feeding bin 7, the classification mechanism 3 further comprises a classification wheel 9, a classification cavity 10 and a germanium powder discharge pipe A 11, the classification wheel 9 is installed at the top of the classification cavity 10, the classification cavity 10 is provided with the germanium powder discharge pipe at the bottom, and the classification cavity 10 is connected with the screw feeder 8 through the feeding pipe 5 at the lower side; the dust removal mechanism 4 further comprises a dust remover 12 and a germanium powder discharge pipe B 13, the dust remover 12 is connected with the dust outlet of the classification cavity 10 through the dust removal pipe 6 at the middle part, and the germanium powder discharge pipe B 13 is installed at the bottom of the dust remover 12; the parts in contact with the germanium powder in the feeding mechanism 2, the classification mechanism 3 and the dust removal mechanism 4 are all sprayed with PTFE coating; and the filter material in the dust remover 12 is PTFE film filter material.

[0022] The effect is that the design of the device ensures the purity of the product, and avoids the friction of germanium powder in the grading cavity 10, which affects the purity of the product. The grading wheel 9 and the grading cavity 10 of the all-ceramic structure reduce the pollution of iron, nickel and zinc. The ECTFE coating 14 sprayed on the inner wall of the grading cavity 10, the dust collector 12 and the valve plate can improve the wear resistance, impact resistance and toughness of the device, reduce noise, and the PTFE coating sprayed on all parts in contact with germanium powder, including fixed screws, bearings and other structures, can ensure that it is not chemically corroded by chloride ions in the material and ensure the purity of the product. The PTFE film filter material can make the collection efficiency of the dust collector greater than 99.99%, strictly and effectively control the dust emission, prevent environmental pollution, and greatly improve the purity of the finished product.

[0023] At the same time, the use of this technology greatly improves the product quality, with a purity of greater than or equal to 99.9999%. The particle size D97 of the ultra-fine germanium powder produced is less than 74-25um, and the particle size can be adjusted. The loss of flying dust of germanium powder material is avoided, and the direct yield is increased by 1.9% from 97.6% to 99.5%, reducing the production cost.

[0024] Further, the inner walls of the grading cavity 10 and the dust collector 12 are sprayed with an ECTFE coating 14 of 0.4-0.7mm. This structure can ensure the wear resistance, impact resistance and toughness of the inner wall of the device, and also ensure the purity of the product.

[0025] Further, the feed bin is welded from 5-7mm high-purity pp material.

[0026] Further, the grading wheel 9 and the grading cavity 10 are provided in an all-ceramic structure. This structure ensures the purity of the product, and the all-ceramic structure reduces the pollution of iron and nickel. The particle size D97 of the ultra-fine germanium powder produced is less than 74-25um, and the particle size can be adjusted. This greatly improves the product quality and reduces the production cost.

[0027] Further, the inlets and outlets of the germanium powder discharge pipes A11 and B13 are provided with high-airtightness unloading pneumatic expansion butterfly valves 15. This structure can facilitate the accurate control of the unloading amount by the operator.

[0028] Further, the valve plate of the high-airtightness unloading pneumatic expansion butterfly valve 15 is sprayed with an ECTFE coating 14 of 0.4-0.7mm. This structure can ensure the wear resistance, impact resistance and toughness of the valve plate, and also ensure the purity of the product.

[0029] Further, the germanium powder discharge pipes A11 and B13 are provided with 5-7mm high-purity pp material.

[0030] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0031] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A special environmentally friendly grading device for high-purity germanium powder, comprising a frame (1), a feeding mechanism (2), a grading mechanism (3), and a dust removal mechanism (4), characterized in that: The frame (1) is equipped with a feeding mechanism (2), a grading mechanism (3), and a dust removal mechanism (4). The feeding mechanism (2) is connected to the grading mechanism (3) via a conveying pipe (5), and the grading mechanism (3) is connected to the dust removal mechanism (4) via a dust removal pipe (6). The feeding mechanism (2) also includes a germanium powder feeding hopper (7) and a screw feeder (8). The screw feeder (8) is installed below the germanium powder feeding hopper (7). The grading mechanism (3) also includes a grading wheel (9), a grading chamber (10), and a germanium powder discharge pipe A (11). The grading wheel (9) is installed on the top of the grading chamber (10). The bottom of the cavity (10) is equipped with a germanium powder discharge pipe, and the lower side of the grading cavity (10) is connected to the screw feeder (8) through the conveying pipe (5); the dust removal mechanism (4) also includes a dust collector (12) and a germanium powder discharge pipe B (13). The middle part of the dust collector (12) is connected to the dust outlet of the grading cavity (10) through the dust removal pipe (6), and the bottom of the dust collector (12) is equipped with a germanium powder discharge pipe B (13); the parts of the feeding mechanism (2), grading mechanism (3) and dust removal mechanism (4) that come into contact with germanium powder are all coated with PTFE coating; the filter material in the dust collector (12) is a PTFE membrane filter material.

2. The environmentally friendly grading device for high-purity germanium powder according to claim 1, characterized in that: The inner walls of the grading chamber (10) and the dust collector (12) are coated with an ECTFE coating of 0.4~0.7mm (14).

3. The environmentally friendly grading device for high-purity germanium powder according to claim 1, characterized in that: The feeding hopper is welded from a hopper plate made of 5-7mm high-purity PP material.

4. The environmentally friendly grading device for high-purity germanium powder according to claim 1, characterized in that: The grading wheel (9) and grading cavity (10) are configured as all-ceramic structures.

5. The environmentally friendly grading device for high-purity germanium powder according to claim 1, characterized in that: High-airtightness pneumatic expansion butterfly valves (15) are installed at the inlet and outlet of the germanium powder discharge pipe A (11) and germanium powder discharge pipe B (13).

6. The environmentally friendly grading device for high-purity germanium powder according to claim 5, characterized in that: The valve plate of the high airtightness pneumatic expansion butterfly valve (15) is coated with an ECTFE coating of 0.4~0.7mm (14).

7. The environmentally friendly grading device for high-purity germanium powder according to claim 1, characterized in that: Both the germanium powder discharge pipe A (11) and the germanium powder discharge pipe B (13) are made of 5~7mm high-purity PP material.

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