High-temperature-resistant oxygen lance for industrial silicon

Abstract

The utility model relates to the technical field of oxygen blowing pipes, in particular to a high-temperature-resistant oxygen blowing pipe for industrial silicon. The high-temperature-resistant oxygen lance for the industrial silicon comprises a lance body, the lance body sequentially comprises a high-temperature-resistant inner layer, a heat insulation layer and a protective outer layer from inside to outside, the high-temperature-resistant inner layer is made of nickel-based alloy materials, the heat insulation layer is a composite layer of ceramic fibers and aluminum silicate fibers, and the protective outer layer is made of aluminum silicate fibers. The protective outer layer is a woven mesh layer made of a low-carbon steel material; one end of the pipe body is an oxygen outlet end, an oxygen distributor is arranged at the oxygen outlet end and comprises a main pipe and a plurality of branch pipes, the main pipe is connected with the oxygen outlet end of the pipe body, the main pipe is located in the middle of the pipe body, the branch pipes are evenly distributed around the main pipe at equal angles, and the outer side of the main pipe is connected with the branch pipes through connecting pipes. An oxygen spraying hole is formed in one side, positioned at the oxygen outlet end of the pipe body, of the branch pipe.

Description

Technical Field

[0001] This utility model relates to the field of oxygen blowing pipe technology, specifically to a high-temperature resistant oxygen blowing pipe for industrial silicon. Background Technology

[0002] In the production of industrial silicon, oxygen blowing pipes play a crucial role in supplying oxygen into the reactor to promote the oxidation reaction of raw materials such as silica, thereby producing industrial silicon.

[0003] Existing oxygen blowing pipes have some problems during use. For example, their high-temperature resistance is insufficient, making them prone to damage in high-temperature environments, leading to frequent replacements and increased production costs. In addition, the structural design of the oxygen blowing pipes is not reasonable enough. When supplying oxygen into the furnace, it is mostly sprayed from a single outlet, resulting in uneven oxygen distribution and affecting reaction efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature resistant oxygen blowing pipe for industrial silicon, so as to solve the problems of oxygen blowing pipes being easily damaged in high-temperature environments and uneven oxygen distribution in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides a high-temperature resistant oxygen blowing pipe for industrial silicon, comprising a pipe body, which includes, from the inside out, a high-temperature resistant inner layer, a heat insulation layer, and a protective outer layer. The high-temperature resistant inner layer is made of nickel-based alloy material with a thickness of 2mm-5mm. The heat insulation layer is a composite layer of ceramic fiber and aluminum silicate fiber with a thickness of 3-8mm. The protective outer layer is a woven mesh layer made of low-carbon steel with a thickness of 1mm-3mm. One end of the pipe body is an oxygen outlet end, which is equipped with an oxygen distributor. The oxygen distributor includes a main pipe connected to the oxygen outlet end of the pipe body and multiple branch pipes. The main pipe is located in the middle of the pipe body, and the branch pipes are evenly distributed around the main pipe at equal angles. The outer side of the main pipe is connected to the multiple branch pipes through connecting pipes. The branch pipes are provided with oxygen injection holes on the side of the oxygen outlet end of the pipe body.

[0006] As a preferred embodiment of this utility model, the side of the pipe body opposite to the oxygen outlet end is sealed to the main pipe.

[0007] As a preferred embodiment of this invention, the mixed filling ratio of ceramic fiber and aluminum silicate fiber in the heat insulation layer is 1:1-2:1.

[0008] As a preferred embodiment of this utility model, the diameter of the main pipe is 1 / 3 to 1 / 2 of the diameter of the pipe body.

[0009] As a preferred embodiment of this utility model, the number of branch pipes is at least six, the connecting pipe is located on the outer front end of the main pipe, and the connection between the branch pipe and the main pipe is located at the tail end of the branch pipe.

[0010] As a preferred embodiment of this utility model, the front end of the branch pipe is flush with the oxygen outlet end of the pipe body or protrudes 0.5cm-1cm from the oxygen outlet end.

[0011] As a preferred embodiment of this utility model, the front end of the branch pipe is a hemispherical structure, and the oxygen injection hole is located in the middle of the front end of the branch pipe. The diameter of the oxygen injection hole is 1 / 3 to 1 / 2 of the diameter of the branch pipe.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] 1. This oxygen blowing pipe uses a nickel-based alloy as its high-temperature resistant inner layer. Nickel-based alloys possess excellent high-temperature strength and oxidation resistance, enabling them to withstand the high-temperature environment of industrial silicon production processes and effectively preventing softening and melting of the oxygen blowing pipe at high temperatures. The insulation layer employs a composite structure of ceramic fiber and aluminosilicate fiber. Both ceramic fiber and aluminosilicate fiber are excellent insulation materials; their combination further enhances the insulation effect, reducing the impact of external high temperatures on the pipe body and mitigating the influence of heat on the internal oxygen temperature, thus helping to improve oxygen reactivity. The outer low-carbon steel woven mesh layer (protective outer layer) protects the insulation layer and strengthens the overall structural strength of the pipe body, preventing damage to the insulation layer from external factors (such as collisions during handling and installation) during use.

[0014] 2. This oxygen blowing pipe distributes the oxygen in the main pipe to each branch pipe through an oxygen distributor, and then the oxygen is evenly sprayed out through the oxygen injection holes on the branch pipe. This structural design allows the oxygen to be more evenly distributed throughout the furnace when it is blown into the reactor, making the reaction more complete, improving the production efficiency of industrial silicon, and reducing the phenomenon of local overheating or incomplete reaction. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a high-temperature oxygen blowing pipe for industrial silicon according to this utility model.

[0016] Figure 2 This is a cross-sectional three-dimensional structural diagram of a high-temperature oxygen blowing pipe for industrial silicon according to this utility model.

[0017] Figure 3 This is an enlarged view of section A of the high-temperature oxygen blowing pipe for industrial silicon according to this utility model.

[0018] Figure 4 This is a structural diagram of an oxygen distributor for a high-temperature oxygen blowing tube used in industrial silicon, according to this utility model.

[0019] As shown in the figure:

[0020] 1. Pipe body; 2. High-temperature resistant inner layer; 3. Insulation layer; 4. Protective outer layer; 5. Oxygen outlet end; 6. Oxygen distributor; 7. Main pipe; 8. Branch pipe; 9. Connecting pipe; 10. Oxygen injection hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example 1:

[0024] As per the instruction manual Figure 1-4 As shown, a high-temperature oxygen blowing pipe for industrial silicon includes a pipe body 1. The pipe body 1 includes, from the inside out, a high-temperature resistant inner layer 2, a heat insulation layer 3, and a protective outer layer 4. The high-temperature resistant inner layer 2 is made of nickel-based alloy material and has a thickness of 3.5 mm. The heat insulation layer 3 is a composite layer of ceramic fiber and aluminosilicate fiber. The mixing ratio of ceramic fiber and aluminosilicate fiber in the heat insulation layer 3 is 1:1-2:1 and the thickness of the heat insulation layer 3 is 5 mm. The protective outer layer 4 is a woven mesh layer made of low-carbon steel material and has a thickness of 2 mm.

[0025] In this utility model, one end of the pipe body 1 is the oxygen outlet end 5, and the side opposite to the oxygen outlet end 5 is sealed to the main pipe 7. The oxygen outlet end 5 is provided with an oxygen distributor 6. The oxygen distributor 6 includes the main pipe 7 connected to the oxygen outlet end 5 of the pipe body 1 and multiple branch pipes 8. The main pipe 7 is located in the middle of the pipe body 1, and the diameter of the main pipe 7 is 1 / 2 of the diameter of the pipe body 1. The branch pipes 8 are evenly distributed around the main pipe 7 at equal angles, and the outer side of the main pipe 7 is connected to the multiple branch pipes 8 through connecting pipes 9. There are six branch pipes 8. The connecting pipe 9 is located on the outer side of the front end of the main pipe 7, and the connection between the branch pipe 8 and the main pipe 7 is located at the tail end of the branch pipe 8. The front end of the branch pipe 8 protrudes 0.5cm from the outer side of the oxygen outlet end 5. An oxygen injection hole 10 is provided on the side of the branch pipe 8 at the oxygen outlet end 5 of the pipe body 1. The front end of the branch pipe 8 has a hemispherical structure, and the oxygen injection hole 10 is located in the middle of the front end of the branch pipe 8. The diameter of the oxygen injection hole 10 is 1 / 3-1 / 2 of the diameter of the branch pipe 8.

[0026] In its specific implementation, this utility model protects the pipe body 1 by a high-temperature resistant inner layer 2 of nickel-based alloy material, a composite heat insulation layer 3 of ceramic fiber and aluminum silicate fiber, and a woven mesh outer layer made of low-carbon steel material. The main pipe 7 distributes oxygen to each branch pipe 8, and the oxygen is evenly sprayed out through the oxygen injection holes 10 on the branch pipe 8. This allows the oxygen to be more evenly distributed throughout the furnace when it is blown into the reactor, making the reaction more complete, improving the production efficiency of industrial silicon, and reducing the phenomenon of local overheating or incomplete reaction.

[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the specific embodiments shown are only one of the embodiments of the present invention. The actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A high-temperature oxygen blowing tube for industrial silicon, comprising a tube body (1), characterized in that: The tube body (1) consists of a high-temperature resistant inner layer (2), a heat insulation layer (3), and a protective outer layer (4) from the inside out. The high-temperature resistant inner layer (2) is made of nickel-based alloy material and has a thickness of 2mm-5mm. The heat insulation layer (3) is a composite layer of ceramic fiber and aluminum silicate fiber and has a thickness of 3-8mm. The protective outer layer (4) is a woven mesh layer made of low-carbon steel material and has a thickness of 1mm-3mm. One end of the pipe body (1) is the oxygen outlet end (5), and the oxygen outlet end (5) is provided with an oxygen distributor (6). The oxygen distributor (6) includes a main pipe (7) connected to the oxygen outlet end (5) of the pipe body (1) and multiple branch pipes (8). The main pipe (7) is located in the middle of the pipe body (1). The branch pipes (8) are evenly distributed around the main pipe (7) at equal angles. The outside of the main pipe (7) is connected to the multiple branch pipes (8) through a connecting pipe (9). The branch pipes (8) are provided with oxygen injection holes (10) on one side of the oxygen outlet end (5) of the pipe body (1).

2. The high-temperature oxygen blowing pipe for industrial silicon according to claim 1, characterized in that: The side of the pipe body (1) opposite to the oxygen outlet end (5) is sealed to the main pipe (7).

3. The high-temperature oxygen blowing pipe for industrial silicon according to claim 1, characterized in that: The ceramic fiber and aluminum silicate fiber of the insulation layer (3) are mixed in a ratio of 1:1 to 2:

1.

4. The high-temperature oxygen blowing pipe for industrial silicon according to claim 1, characterized in that: The diameter of the main pipe (7) is 1 / 3 to 1 / 2 of the diameter of the pipe body (1).

5. A high-temperature oxygen blowing pipe for industrial silicon according to claim 1, characterized in that: The number of branch pipes (8) is at least six. The connecting pipe (9) is located outside the front end of the main pipe (7), and the connection between the branch pipe (8) and the main pipe (7) is located at the tail end of the branch pipe (8).

6. A high-temperature oxygen blowing tube for industrial silicon according to claim 1, characterized in that: The front end of the branch pipe (8) is flush with the oxygen outlet end (5) of the pipe body (1) or protrudes 0.5cm-1cm from the oxygen outlet end (5).

7. A high-temperature oxygen blowing pipe for industrial silicon according to claim 1, characterized in that: The front end of the branch pipe (8) is a hemispherical structure, and the oxygen injection hole (10) is located in the middle of the front end of the branch pipe (8). The diameter of the oxygen injection hole (10) is 1 / 3 to 1 / 2 of the diameter of the branch pipe (8).

Images