CN221387384U

CN221387384U - Granular polycrystalline silicon separator

Info

Publication number: CN221387384U
Application number: CN202323052328.1U
Authority: CN
Inventors: 王创; 付绪光; 王共远; 谢岩; 蒋文娟
Original assignee: Inner Mongolia Xinhuan Silicon Energy Technology Co ltd
Current assignee: Inner Mongolia Xinhuan Silicon Energy Technology Co ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-07-23
Anticipated expiration: 2033-11-13

Abstract

The utility model discloses a granular polycrystalline silicon separator, which comprises a cylindrical upper half part and a conical lower half part; the top of the upper half part is provided with a feed inlet, and the side surface of the upper half part is provided with a first discharge outlet; the bottom of the lower half part is provided with a second discharge hole; a first sieve plate is transversely arranged in the upper half part, the upper half part is divided into an upper part and a lower part, and small particle silicon can fall into the lower half part through the first sieve plate and is discharged from a second discharge hole; and large-particle silicon trapped on the first sieve plate is discharged from the first discharge hole. The classifier classifies granular polycrystalline silicon by utilizing the difference of the pore diameters of the sieve plates, and simultaneously considers the possible condition that the granular polycrystalline silicon cannot be accumulated and discharged during classification, and a plurality of pneumatic rappers are arranged outside the classifier, so that economical and efficient classification is realized.

Description

Granular polycrystalline silicon separator

Technical Field

The utility model belongs to the field of polysilicon production, and particularly relates to a granular polysilicon sorter.

Background

The granular polycrystalline silicon produced by the silane fluidized bed method is packaged for sale only by screening and removing small particles due to inconsistent particle sizes, and the granular polycrystalline silicon can be sorted in stages from output to packaging and the screened small particles are utilized. At present, granular silicon fills the gap of the multicrystalline silicon diversified production process, and when single crystals are pulled up, the crucible filling rate can be effectively improved due to good circularity and fluidity and low inter-granular gap rate, so that the requirement of single crystal materials is met. If the particle size of the granular polysilicon is smaller, the granular polysilicon will melt when entering the crucible, and the feed inlet is blocked, so the demand of the produced small particles at the downstream is very small, but the generation of the small particle silicon is unavoidable, and the small particle silicon can be sorted before the fluidized bed outlet and packaging, so that the sorter is also a poor investment in actual production, and the sorter is very necessary to select an economic sorter capable of meeting the demand at the same time.

Disclosure of utility model

The utility model aims to: aiming at the defects of the prior art, the utility model provides the granular polysilicon sorter, which achieves the aim of efficient sorting.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

A granular polysilicon classifier, comprising a cylindrical upper half and a conical lower half; the top of the upper half part is provided with a feed inlet, and the side surface of the upper half part is provided with a first discharge outlet; the bottom of the lower half part is provided with a second discharge hole; a first sieve plate is transversely arranged in the upper half part, the upper half part is divided into an upper part and a lower part, and small particle silicon can fall into the lower half part through the first sieve plate and is discharged from a second discharge hole; and large-particle silicon trapped on the first sieve plate is discharged from the first discharge hole.

Further, the first discharge hole is positioned at the upper part of the first sieve plate and is connected to the granular silicon product tank through a blanking pipe.

Further, the second discharge hole is connected to the fluidized bed below through a discharging pipe.

Further, the first sieve plate is a sieve plate forming an oblique angle of 20-30 degrees with the horizontal plane, the aperture of the sieve plate is 16-20 meshes, and the sieve plate is in seamless connection with the inner wall of the upper half part of the separator.

Further, the upper half part is provided with a through groove communicated with the first discharge hole on the side surface at the lower end of the inclined surface of the first sieve plate.

Further, a second sieve plate is arranged at the through groove.

Further, the second sieve plate is vertically arranged at the through groove on the side surface of the upper sorting half part, and the aperture of the second sieve plate is 4-16 meshes.

Further, a group of pneumatic rappers are arranged around the cylindrical upper half part and the conical lower half part.

Further, a large particle outlet buffer is arranged at the first discharging hole and is arranged on the outer side surface of the upper half part of the separator.

Further, the first discharging hole is connected into the large particle outlet buffer in a conical shape.

The beneficial effects are that:

The granular polycrystalline silicon sorter sorts granular polycrystalline silicon by utilizing the difference of the pore diameters of the sieve plates, the vertical sieve plates and the transverse sieve plates are combined to sort solid materials, meanwhile, the situation that stacking cannot be carried out in sorting is considered, a plurality of pneumatic rappers are arranged outside the vertical sieve plates, solid blanking blockage is avoided, and economical and efficient sorting is realized.

Drawings

The foregoing and/or other advantages of the utility model will become more apparent from the following detailed description of the utility model when taken in conjunction with the accompanying drawings and detailed description.

Fig. 1 is a schematic structural view of the granular polycrystalline silicon classifier.

Wherein each reference numeral represents:

10 upper half; 101 feed inlet; 102 a first discharge port; 103 a second discharge port; 104 a first screening deck; 105 a second screening deck; 106 a pneumatic vibrator; 107 large particle exit buffer; 20 lower half.

Detailed Description

The utility model will be better understood from the following examples.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the disclosure of the present utility model, and are not intended to limit the scope of the utility model, which is defined by the claims, but rather by the terms of modification, variation of proportions, or adjustment of sizes, without affecting the efficacy or achievement of the present utility model, should be understood as falling within the scope of the present utility model. Also, the terms such as "upper", "lower", "front", "rear", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the utility model for which the utility model may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.

As shown in fig. 1, the granular polycrystalline silicon classifier includes a cylindrical upper half 10 and a conical lower half 20; the top of the upper half 10 is provided with a feed inlet 101, and the side surface of the upper half 10 is provided with a first discharge outlet 102; the bottom of the lower half part 20 is provided with a second discharge hole 103; a first sieve plate 104 is transversely arranged in the upper half part 10 to divide the upper half part 10 into an upper part and a lower part, and small particle silicon can fall into the lower half part 20 through the first sieve plate 104 and is discharged from the second discharge hole 103; the large particle silicon trapped on the first screen plate 104 is discharged from the first discharge port 102.

Wherein, first discharge gate 102 is located in first sieve 104 upper portion, is connected to granule silicon product jar through the unloading pipe.

The second discharge port 103 is connected to the lower fluidized bed through a discharge pipe and further reacts with the gas phase raw material gas silane gas.

The first sieve plate 104 is a sieve plate forming an oblique angle of 20-30 degrees with the horizontal plane, the aperture of the sieve plate is 16-20 meshes, and the sieve plate is in seamless connection with the inner wall of the upper half part 10 of the separator.

The upper half 10 is positioned at the side surface of the lower end of the inclined surface of the first sieve plate 104, and is provided with a through groove communicated with the first discharging hole 102.

A second screen plate 105 is arranged at the through groove.

The second sieve plate 105 is vertically arranged at the through groove on the side surface of the sorting upper half part 10, and the aperture of the second sieve plate 105 is 4-16 meshes.

A group of pneumatic rappers 106 are arranged around the cylindrical upper half 10 and the conical lower half 20.

The first discharge port 102 is provided with a large particle outlet buffer 107, and the large particle outlet buffer 107 is arranged on the outer side surface of the upper half part 10 of the separator.

The first outlet 102 is connected in a conical shape into a large particle outlet buffer 107.

The granular silicon to be sorted enters the sorter from the feed inlet 101, and large granular silicon rolls down to the first discharge outlet 102 along the first screen plate 104 by utilizing the rolling property of the granules, and is directly fed into the granular silicon product tank through the large granular outlet buffer 107. The small-particle silicon falls into the lower half 20 through the first sieve plate 104, and is discharged from the second discharge hole 103 into the fluidized bed to continue to react to generate large-particle silicon, and then the large-particle silicon is sent into a particle silicon product tank.

Meanwhile, a group of pneumatic rappers 106 are arranged at proper positions outside the separator, so that the situations of slow discharging and the like possibly occurring in the material separation process are avoided.

The utility model provides a method and a thought of a granular polysilicon sorter, and a plurality of methods and ways for realizing the technical scheme are provided, the above is only a preferred embodiment of the utility model, and it should be pointed out that a plurality of improvements and modifications can be made by those skilled in the art without departing from the principle of the utility model, and the improvements and modifications are also considered as the protection scope of the utility model. The components not explicitly described in this embodiment can be implemented by using the prior art.

Claims

1. A granular polysilicon classifier characterized by comprising a cylindrical upper half (10) and a conical lower half (20); the top of the upper half part (10) is provided with a feed inlet (101), and the side surface of the upper half part (10) is provided with a first discharge outlet (102); the bottom of the lower half part (20) is provided with a second discharge hole (103); a first sieve plate (104) is transversely arranged in the upper half part (10) to divide the upper half part (10) into an upper part and a lower part;

The first sieve plate (104) forms 20-30 degrees with the horizontal plane, the aperture of the first sieve plate is 16-20 meshes, and the first sieve plate is in seamless connection with the inner wall of the upper half part (10) of the separator;

The upper half part (10) is positioned on the side surface of the lower end of the inclined surface of the first sieve plate (104), and is provided with a through groove communicated with the first discharge hole (102);

A second sieve plate (105) is arranged at the through groove;

The second sieve plate (105) is vertically arranged at a through groove on the side surface of the upper half part (10) of the separator, and the aperture of the second sieve plate (105) is 4-16 meshes;

a group of pneumatic rappers (106) are arranged around the cylindrical upper half part (10) and the conical lower half part (20).

2. The granular polysilicon classifier as set forth in claim 1, wherein the first discharge port (102) is located at an upper portion of the first screen plate (104) and is connected to the granular silicon product tank through a discharge pipe.

3. The granular polysilicon classifier as set forth in claim 1, wherein the second discharge port (103) is connected to the lower fluidized bed through a discharge pipe.

4. The granular polysilicon classifier as set forth in claim 1, wherein the first discharge port (102) is provided with a large particle outlet buffer (107), and the large particle outlet buffer (107) is mounted on the outer side surface of the upper half (10) of the classifier.

5. The granular polysilicon classifier as set forth in claim 4, wherein the first discharge port (102) is connected in a conical shape into the large granule outlet buffer (107).