A high-purity quartz sand high-temperature chlorination purification pipe structure

Abstract

A high-purity quartz sand high-temperature chlorination purification pipe structure includes a main pipe, with both ends welded to one end of a first reducing neck and one end of a second reducing neck, respectively. The other end of the first reducing neck is welded to one end of a straight pipe, and the other end of the second reducing neck is welded to a capped pipe. The other end of the straight pipe is detachably connected to a movable insulating plug. Using this structure, the pipe diameter and length can be adjusted flexibly to accommodate varying material loading. It features high strength, high temperature resistance, and corrosion resistance, making it suitable for large-scale production. It allows for both continuous and intermittent production, vacuum sintering and vacuum dehydroxylation, and atmosphere sintering and atmosphere reaction, offering high flexibility. Material is evenly dispersed, and the gas flow and pressure can be flexibly controlled, ensuring sufficient contact with the reaction gas, reducing material costs, preventing gas leakage, and ensuring high safety.

Description

Technical Field

[0001] This utility model relates to the field of deep processing technology of non-metallic mineral materials, and in particular to a high-purity quartz sand high-temperature chlorination purification pipe structure. Background Technology

[0002] High-purity quartz sand is a new type of non-metallic mineral material obtained by refining and purifying natural siliceous minerals through various means. It usually refers to quartz sand with a SiO2 content of 99.99% (4N) or higher. It is mainly used to manufacture high-purity quartz glass such as large-size photolithography substrates, fiber optic brackets, fully transparent ultraviolet optical devices, quartz crucibles, and diffusion furnace tubes. It is an indispensable basic material for strategic emerging industries such as modern electronic information, semiconductors, photovoltaic energy, and optical light sources. It plays a pivotal role in major national projects such as aerospace and military industries, as well as national defense and security. It is currently irreplaceable, and the demand will continue for a long time.

[0003] Currently, the production of high-purity quartz sand in China typically uses vein quartz and crystal as raw materials, and usually involves numerous physical and chemical processes such as crushing, grinding, grading, scrubbing, photoelectric separation, electromagnetic separation, flotation, acid leaching, and chlorination. Chlorination generally involves introducing chlorine-containing gas at high temperatures to further purify the acid-leached quartz sand, aiming to remove trace impurities from the quartz crystal lattice and inclusions. Currently, all gas chlorination devices on the market use open-type quartz tube rotary furnaces, with gas entering at one end and exiting at the other. This chlorination method has several drawbacks, mainly in the following aspects:

[0004] 1. The contact and reaction between impurity elements and chlorine gas requires a certain amount of time and cannot be completed in a very short time. Due to the open and continuous operation, the contact time between the material and chlorine gas is very limited, and they are discharged before they can fully contact and react, thus failing to achieve the purpose of impurity removal.

[0005] 2. As it is a continuous open operation, a large amount of highly corrosive chlorine-containing gas is required in the production process, which not only brings great safety hazards, but also causes great environmental pressure.

[0006] 3. Since quartz tubes are brittle, their volume and capacity as reaction tubes are limited, which affects the output. The maximum hourly output of a large double-tube rotary kiln is no more than 50 kg, which is very limited and not suitable for industrial-scale production.

[0007] 4. Quartz tubes generally have a lifespan of about 90 days and need to be replaced promptly after a certain period; otherwise, production will be affected. Due to the high price of quartz tubes, their susceptibility to damage, and short lifespan, production costs remain high. Summary of the Invention

[0008] The technical problem to be solved by this utility model is to provide a high-purity quartz sand high-temperature chlorination purification pipe structure. The diameter and length of the pipe structure can be large or small, which can flexibly change the material loading. It has high strength, high temperature resistance, and corrosion resistance, and is suitable for large-scale production. It can be used for continuous or intermittent production, vacuum sintering or vacuum dehydroxylation, atmosphere sintering or atmosphere reaction, which is highly flexible. The material is evenly dispersed, the gas flow and pressure can be flexibly controlled, and it can fully contact the reaction gas, reduce material costs, avoid gas leakage, and has high safety.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a high-purity quartz sand high-temperature chlorination purification pipe structure, including a main pipe, the two ends of the main pipe are respectively welded to one end of a first variable diameter neck and a second variable diameter neck, the other end of the first variable diameter neck is welded to one end of a straight pipe, the other end of the second variable diameter neck is welded to a capping pipe, and the other end of the straight pipe is detachably connected to a movable heat-insulating plug.

[0010] The straight pipe is equipped with a connecting flange and a first rolling ring;

[0011] The end cap tube is provided with a second rolling ring and a first vent pipe, and the end of the first vent pipe away from the second reducing neck tube is provided with a tee structure;

[0012] The movable insulation plug is equipped with a second vent pipe and a sealing connection flange, which can be disassembled and assembled with the connection flange.

[0013] In a preferred embodiment, multiple sets of first baffles are fixedly connected to the inner wall of the first variable-diameter neck.

[0014] In a preferred embodiment, multiple sets of second baffles are fixedly connected to the inner wall of the main tube.

[0015] In a preferred embodiment, multiple sets of third baffles are fixedly connected to the inner wall of the second variable-diameter neck.

[0016] In a preferred embodiment, the end cap tube is provided with a first high-temperature resistant insulation material.

[0017] In a preferred embodiment, the movable insulation plug is provided with a second high-temperature resistant insulation material.

[0018] In a preferred embodiment, the end of the first vent pipe near the second variable-diameter neck pipe is provided with a perforated cover.

[0019] In a preferred embodiment, a sealing ring is provided at the connection point between the straight pipe and the movable insulation plug.

[0020] The high-purity quartz sand high-temperature chlorination purification tube structure provided by this utility model has the following beneficial effects by adopting the above structure:

[0021] (1) The diameter and length of the pipe structure can be large or small, which corresponds to the flexible change of material loading. It is high-strength, high-temperature resistant, and corrosion resistant, and is suitable for large-scale production.

[0022] (2) It can be produced continuously or intermittently, and can be vacuum sintered or vacuum dehydroxylated. It can be sintered in an atmosphere or reacted in an atmosphere, and has high flexibility.

[0023] (3) The material is evenly dispersed, the ventilation volume and pressure are flexibly controlled, and it can fully contact the reaction gas, reduce material costs, avoid gas leakage, and has strong safety. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0027] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0028] In the diagram: Straight pipe 1, connecting flange 101, first rolling ring 102, sealing ring 103, first reducing neck 2, first baffle 201, main pipe 3, second baffle 301, second reducing neck 4, third baffle 401, end cap 5, second rolling ring 501, first high-temperature resistant insulation material 502, first vent pipe 503, tee structure 504, perforated cover 505, movable insulation plug 6, second vent pipe 601, sealing flange cover plate 602, second high-temperature resistant insulation material 603. Detailed Implementation

[0029] Example 1:

[0030] like Figure 1-3 In the present invention, a high-purity quartz sand high-temperature chlorination purification pipe structure includes a main pipe 3, the two ends of the main pipe 3 being welded to one end of a first variable diameter neck 2 and a second variable diameter neck 4 respectively, the other end of the first variable diameter neck 2 being welded to one end of a straight pipe 1, the other end of the second variable diameter neck 4 being welded to a capping pipe 5, and the other end of the straight pipe 1 being detachably connected to a movable heat-insulating plug 6.

[0031] The straight pipe 1 is provided with a connecting flange 101 and a first rolling ring 102;

[0032] The end cap tube 5 is provided with a second rolling ring 501 and a first vent pipe 503. The end of the first vent pipe 503 away from the second reducing neck tube 4 is provided with a three-way structure 504.

[0033] The movable insulation plug 6 is provided with a second vent pipe 601 and a sealing connection flange 602, and the sealing connection flange 602 is detachable and assembled with the connection flange 101.

[0034] The tee structure 504 is equipped with a pressure gauge and a vent connector for connecting to an air extraction device.

[0035] like Figure 2 In a preferred embodiment, multiple sets of first baffles 201 are fixedly connected to the inner wall of the first variable-diameter neck 2. Three first baffles 201 are provided, which divide the first variable-diameter neck 2 into multiple equal parts. The projection of the first baffle 201 forms an angle of 0 to 30 degrees with the tube axis of the first variable-diameter neck 2, with the optimal angle being 15 degrees.

[0036] like Figure 3 In a preferred embodiment, multiple sets of second baffles 301 are fixedly connected to the inner wall of the main pipe 3. At least three sets of second baffles 301 are provided, each set of second baffles 301 dividing the cross-sectional direction of the main pipe 3 into at least three equal parts, with a gap between adjacent sets of second baffles 301.

[0037] like Figure 1 In a preferred embodiment, multiple sets of third baffles 401 are fixedly connected to the inner wall of the second variable-diameter neck 4. At least three third baffles 401 are provided, and the projection of the third baffles 401 forms a zero-degree angle with the pipe axis of the second variable-diameter neck 4. The multiple sets of third baffles 401 divide the inner wall of the second variable-diameter neck 4 into multiple equal parts.

[0038] like Figure 1 In a preferred embodiment, the end cap 5 is provided with a first high-temperature resistant insulation material 502. The first high-temperature resistant insulation material 502 can be made of ceramic fiber or alumina fiber.

[0039] like Figure 1 In a preferred embodiment, the movable insulation plug 6 is provided with a second high-temperature resistant insulation material 603. The second high-temperature resistant insulation material 603 can be made of ceramic fiber or alumina fiber.

[0040] like Figure 1 In a preferred embodiment, the first vent pipe 503 has a perforated cover 505 at one end near the second reducing neck pipe 4. This cover is used to filter powder in the air inside the pipe and prevent powder from entering the first vent pipe 503.

[0041] Example 2:

[0042] like Figure 1-3 The working principle of this utility model is as follows:

[0043] During loading, the movable insulation plug 6 is removed, the quartz sand to be purified is added into the main pipe 3, the movable insulation plug 6 is then reinstalled, and the connection flange 101 of the straight pipe 1 is sealed and fitted through the sealing connection flange 602, with the sealing ring 103 enhancing the sealing performance.

[0044] During operation, the entire structure is supported on an external drive device by the first rolling ring 102 and the second rolling ring 501, allowing the structure to rotate around its axis. During rotation, the first baffle 201 on the inner wall of the first variable-diameter neck 2, the second baffle 301 on the inner wall of the main pipe 3, and the third baffle 401 on the inner wall of the second variable-diameter neck 4 cause the quartz sand to tumble, increasing the dispersion of the quartz sand.

[0045] Chlorine gas is introduced through a three-way structure 504 into the first vent pipe 503, and a perforated cover 505 prevents quartz sand from entering the first vent pipe 503. Simultaneously, the second vent pipe 601 can be used to balance the internal pressure or to release the reacted gas. Under high-temperature conditions, the chlorine gas flows inside the device, making full contact with the agitated quartz sand, and purification is achieved through the reaction of the gas with impurities in the quartz sand.

[0046] The first high-temperature resistant insulation material 502 inside the end cap tube 5 and the second high-temperature resistant insulation material 603 inside the movable insulation plug 6 can reduce internal heat loss, maintain a high-temperature reaction environment, and improve purification efficiency.

[0047] After the reaction is complete, stop the flow of chlorine gas. After the device has cooled down, remove the movable insulating plug 6 and take out the purified quartz sand.

[0048] The beneficial effects of this utility model are: the diameter and length of the tube structure can be large or small, which corresponds to the flexible changes in material loading; it has high strength, high temperature resistance, and corrosion resistance, making it suitable for large-scale production; it can be produced continuously or intermittently, and can be vacuum sintered or vacuum dehydroxylated, and can be sintered or reacted in an atmosphere, which is highly flexible; the material is evenly dispersed, the gas flow rate and pressure are flexibly controlled, and it can fully contact the reaction gas, reducing material costs, avoiding gas leakage, and ensuring high safety.

Claims

1. A high-purity quartz sand high-temperature chlorination purification tube structure comprising a main tube (3), characterized in that: The two ends of the main pipe (3) are respectively welded to one end of the first variable diameter neck (2) and the second variable diameter neck (4), the other end of the first variable diameter neck (2) is welded to one end of the straight pipe (1), the other end of the second variable diameter neck (4) is welded to the end cap (5), and the other end of the straight pipe (1) is detachably connected to the movable heat insulation plug (6). The straight pipe (1) is provided with a connecting flange (101) and a first rolling ring (102); The end cap (5) is provided with a second rolling ring (501) and a first vent pipe (503). The end of the first vent pipe (503) away from the second reducing neck pipe (4) is provided with a three-way structure (504). The movable insulation plug (6) is provided with a second vent pipe (601) and a sealing connection flange (602), and the sealing connection flange (602) and the connection flange (101) are disassembled and assembled together.

2. The high purity quartz sand high temperature chlorination purification tube structure according to claim 1, characterized in that: Multiple sets of first baffles (201) are fixedly connected to the inner wall of the first variable diameter neck (2).

3. The high purity quartz sand high temperature chlorination purification tube structure according to claim 1, characterized in that: Multiple sets of second baffles (301) are fixedly connected to the inner wall of the main tube (3).

4. The high purity quartz sand high temperature chlorination purification tube structure according to claim 1, characterized in that: Multiple sets of third baffles (401) are fixedly connected to the inner wall of the second variable diameter neck (4).

5. The high purity quartz sand high temperature chlorination purification tube structure according to claim 1, characterized in that: The end cap tube (5) is provided with a first high-temperature resistant insulation material (502).

6. The high purity quartz sand high temperature chlorination purification tube structure according to claim 1, characterized in that: The movable insulation plug (6) is provided with a second high-temperature resistant insulation material (603).

7. The high purity quartz sand high temperature chlorination purification tube structure according to claim 1, characterized in that: The first vent pipe (503) has a perforated cover (505) at one end near the second reducing neck pipe (4).

8. The high purity quartz sand high temperature chlorination purification tube structure according to claim 1, characterized in that: A sealing ring (103) is provided at the connection position between the straight pipe (1) and the movable insulation plug (6).

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