CN211393877U

CN211393877U - Polycrystalline silicon reduction furnace and nozzle thereof

Info

Publication number: CN211393877U
Application number: CN201922324739.9U
Authority: CN
Inventors: 郭四海; 袁中华; 游书华; 彭中; 殷万朋
Original assignee: Inner Mongolia Tongwei Gaochun Crystal Silicon Co ltd
Current assignee: Inner Mongolia Tongwei Gaochun Crystal Silicon Co ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-09-01
Anticipated expiration: 2029-12-20

Abstract

The utility model discloses a nozzle, include the body that is used for adjusting gas jet height, the body includes: the frustum is internally provided with a first taper hole, the first taper hole is used for allowing materials to enter the pipe body, and the frustum is arranged at the bottom of the pipe body; the diffusion section is internally provided with a second taper hole for diffusing materials, and the diffusion section is arranged at the top of the pipe body; the extension section is arranged between the frustum and the diffusion section and connected with the frustum and the diffusion section, and a through hole communicated with the first taper hole and the second taper hole is formed in the extension section. The utility model also discloses a polycrystalline silicon reduction furnace including above-mentioned nozzle. The nozzle can remarkably improve the gas injection height through the arrangement of the frustum, the extension section and the diffusion section so as to reduce the diffusion and attenuation of the jet flow of the material at the lower section of the reducing furnace, so that the temperature of the cross beam part of the silicon rod of the reducing furnace can be well reduced, and the appearance of coral materials and the large end of the cross beam can be further inhibited.

Description

Polycrystalline silicon reduction furnace and nozzle thereof

Technical Field

The utility model relates to a polycrystalline silicon production technical field, in particular to nozzle. The utility model also relates to a polysilicon reduction furnace with the nozzle.

Background

At present, in the process of growing silicon rods in a domestic reduction furnace, a cooling dead zone is formed due to heat concentration of a furnace cylinder end socket part in the reduction furnace, so that the temperature difference of the upper part and the lower part of the silicon rods is large, the temperature of a cross beam part is higher, and a serious coral material is formed, so that the dense material ratio of a polycrystalline silicon product is influenced, and the cross beam part is fused due to overhigh temperature at the cross beam part, so that the silicon rods are broken and run in an open phase, and further the running stability, the product quality and the product power consumption of the reduction furnace are influenced. In the current polysilicon market, the price difference between a single crystal compact material and a polycrystal material is about 1.5 ten thousand per ton, and domestic polysilicon manufacturers only can use silicon cores with shorter lengths to improve the proportion of the compact material, sacrifice the yield of a single furnace and the reduction power consumption to improve the production condition with larger difference of the upper and lower temperature fields in a reduction furnace, and limit the release of the yield of polysilicon. However, most of the reduction furnaces in the current polysilicon industry are direct injection nozzles or spiral nozzles, which are limited by the setting of nozzle aperture and the influence of feeding amount, the attenuation of flow velocity of feeding gas passing through the nozzles is serious, the material injection height is low, and mass transfer and heat transfer at the cross beam part of the silicon rod are limited, so coral materials are easily generated at the part, and due to the limitation of the injection aperture and the channel length of the nozzles, turbulence phenomenon is easily generated at the feeding nozzle to influence the injection height, so that the mass transfer and the heat transfer at the cross beam part of the silicon rod are influenced, and further, serious coral materials are generated at the cross beam part, so that the silicon rod is broken and the alarm of a reduction electrical control system is caused.

Therefore, how to avoid the influence on the stability and safety of the operation of the reduction furnace due to the turbulent phenomenon of the traditional nozzle at the feeding position is a technical problem to be solved by the technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a nozzle, improvement gas injection height that this nozzle can be more showing reduces the diffusion and the decay of material at reduction furnace low-end position jet flow, reduction crossbeam temperature that can be better, suppresses the appearance of coral material and crossbeam major part. The utility model also aims to provide a polysilicon reduction furnace comprising the nozzle.

To achieve the above object, the present invention provides a nozzle, including a pipe body for adjusting a gas injection height, the pipe body including:

the conical table is internally provided with a first conical hole, the first conical hole is used for allowing materials to enter the pipe body, and the conical table is arranged at the bottom of the pipe body;

the diffusion section is internally provided with a second taper hole for diffusing materials, and the diffusion section is arranged at the top of the pipe body;

locate between the frustum with the diffuser section and be connected the frustum with the diffuser section's extension section, the inside of extension section be equipped with first taper hole with the through-hole of second taper hole intercommunication.

Optionally, the first taper hole tapers in a direction proximate to the extension.

Optionally, the second bore tapers in a direction proximate the extension.

Optionally, a connecting end used for being connected with the reduction furnace body in a matched mode is arranged at the bottom of the frustum.

Optionally, the taper angle of the first tapered bore ranges from 24 ° to 36 °, and the taper angle of the second tapered bore ranges from 2.8 ° to 6.6 °.

Optionally, the length of the extension section ranges from 64 mm to 98mm, and the diameter of the through hole ranges from 10 mm to 14 mm.

The utility model also provides a polycrystalline silicon reduction furnace, including above-mentioned arbitrary nozzle.

Compared with the prior art, the utility model discloses different requirements to polycrystalline silicon production, a nozzle has been designed, specifically speaking, above-mentioned nozzle includes can adjust the body of gas jet height, and this body includes frustum, extension section and diffuser segment, wherein, the frustum is inside to be equipped with first taper hole, and first taper hole is used for supplying the material to get into the body, and the frustum is located the bottom of body; the diffusion section is internally provided with a second taper hole for diffusing materials, and the diffusion section is arranged at the top of the pipe body; the extension section is arranged between the frustum and the diffusion section and is connected with the frustum and the diffusion section, and a through hole communicated with the first taper hole and the second taper hole is formed in the extension section. Therefore, the nozzle can remarkably improve the gas injection height through the arrangement of the frustum, the extension section and the diffusion section so as to reduce the diffusion and attenuation of the injection flow of the material at the lower section of the reduction furnace, so that the temperature of the cross beam part of the silicon rod of the reduction furnace can be well reduced, and the appearance of coral material and the large end of the cross beam can be further inhibited.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a nozzle according to an embodiment of the present invention.

Wherein:

1-frustum, 11-first taper hole, 2-extension section, 21-through hole, 3-diffusion section and 31-second taper hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a nozzle, improvement gas injection height that this nozzle can be showing more reduces diffusion and decay of material at reduction furnace low-end position jet flow, reduction crossbeam temperature that can be better, suppresses the appearance of coral material and crossbeam major part. The utility model also aims to provide a polysilicon reduction furnace comprising the nozzle.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

It should be noted that the following directional terms such as "upper end, lower end, left side, right side" and the like are defined based on the drawings of the specification.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a nozzle according to an embodiment of the present invention.

The nozzle provided by the embodiment of the utility model is mainly used on a polysilicon reduction furnace, the nozzle comprises a pipe body which can adjust the gas injection height, the pipe body comprises a frustum 1, an extension section 2 and a diffusion section 3, wherein, a first taper hole 11 is arranged inside the frustum 1, the first taper hole 11 is used for feeding materials into the pipe body, and the frustum 1 is arranged at the bottom of the pipe body; a second taper hole 31 is formed in the diffusion section 3, the second taper hole 31 is used for diffusing materials, and the diffusion section 3 is arranged at the top of the pipe body; the extension section 2 is arranged between the frustum 1 and the diffusion section 3 and is connected with the frustum 1 and the diffusion section 3, and a through hole 21 communicated with the first taper hole 11 and the second taper hole 31 is formed in the extension section 2.

Therefore, the nozzle can remarkably improve the gas injection height through the arrangement of the frustum 1, the extension section 2 and the diffusion section 3 so as to reduce the diffusion and attenuation of the injection flow of the material at the lower section of the reduction furnace, so that the temperature of the cross beam part of the silicon rod of the reduction furnace can be well reduced, and the appearance of coral material and the large end of the cross beam can be further inhibited. That is, the nozzle can improve the mass and heat transfer conditions of the beam part, thereby reducing the influence of the coral material ratio.

According to practical requirements, the nozzle may be a nozzle made of stainless steel, such as 316L (a trademark of stainless steel material), and the first taper hole 11, the second taper hole 31 and the through hole 21 may be formed by cutting and drilling, but the material and the processing of the nozzle may also be different, and this is not limited in this context.

Further, the first taper hole 11 and the second taper hole 31 are trumpet-shaped openings, and the first taper hole 11 may be arranged to be tapered in a direction close to the extension section 2, so that the divergence of the feed gas flow may be reduced, and the attenuation of the feed may be reduced; the second taper hole 31 may also be configured to taper in a direction close to the extension section 2, that is, the inner hole of the frustum 1 may be configured to have an upper end opening smaller than a lower end opening, and the inner hole of the extension section 2 may be configured to have an upper end opening larger than a lower end opening, so as to facilitate gas diffusion.

In order to optimize the above embodiment, the taper angle range of the first taper hole 11 may be set to 24-36 °, the taper angle range of the second taper hole 31 may be set to 2.8-6.6 °, the length range of the extension 2 may be set to 64-98mm, and the diameter range of the through hole 21 may be set to 10-14 mm. Preferably, when the taper angle of the first taper hole 11 is set to 30 ° and the taper angle of the second taper hole 31 is set to 5 °, the total feed amount is about 4800Nm³Under the working condition of h, the jet height of the gas can reach about 2.8m through the arrangement of the nozzle, and the arrangement mode can reduce the divergence of the feeding gas flow, so that the attenuation degree of the material is about 8% lower than that of the conventional nozzle, and thus, the temperature fields of the cross beam part and the end enclosure of the silicon rod of the reduction furnace can be effectively improved, and the generation of coral materials is inhibited.

On the basis, the bottom of the frustum 1 can be further provided with a connecting end used for being connected with a reduction furnace body in a matched mode, for example, a connecting groove can be formed in the outer wall of the bottom of the frustum 1 and used for enabling the reduction furnace body to be matched in a nested mode, and therefore the nozzle can be fixedly installed. Of course, the frustum 1 may be further welded to the furnace body in order to reinforce the connection of the nozzle.

The utility model provides a polysilicon reduction furnace, which comprises the nozzle described in the above embodiment; other parts of the polysilicon reduction furnace can be referred to the prior art, and the invention is not expanded.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The polycrystalline silicon reduction furnace and the nozzle thereof provided by the utility model are introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A nozzle comprising a body for adjusting a height of a gas jet, the body comprising:

the pipe body is characterized in that a frustum (1) with a first taper hole (11) is arranged inside the frustum, the first taper hole (11) is used for allowing materials to enter the pipe body, and the frustum (1) is arranged at the bottom of the pipe body;

the diffusion section (3) is internally provided with a second taper hole (31), the second taper hole (31) is used for diffusing materials, and the diffusion section (3) is arranged at the top of the pipe body;

locate frustum (1) with connect between diffuser segment (3) frustum (1) with extension (2) of diffuser segment (3), the inside of extension (2) be equipped with first taper hole (11) with through-hole (21) of second taper hole (31) intercommunication.

2. A nozzle according to claim 1, characterized in that the first cone hole (11) tapers in a direction close to the extension (2).

3. A nozzle according to claim 2, characterized in that the second cone aperture (31) tapers in a direction close to the extension section (2).

4. A nozzle according to claim 3, characterized in that the bottom of the cone (1) is provided with a connection end for a mating connection with the reduction furnace body.

5. A nozzle according to any one of claims 1 to 4, characterized in that the cone angle of the first cone hole (11) is in the range 24-36 ° and the cone angle of the second cone hole (31) is in the range 2.8-6.6 °.

6. Nozzle according to any of claims 1 to 4, wherein the length of the extension (2) is in the range of 64-98mm and the diameter of the through hole (21) is in the range of 10-14 mm.

7. A polycrystalline silicon reduction furnace, characterized by comprising the nozzle according to any one of claims 1 to 6.