Supersonic jet mill for preparing high-purity silicon dioxide

Abstract

The utility model relates to the technical field of silicon dioxide production, in particular to a supersonic jet mill for preparing high-purity silicon dioxide, which comprises a main body, a grinding cavity and a plurality of nozzles, the feeding module is arranged on the main body and is used for conveying materials into the grinding cavity; the gas spraying module is arranged around the main body and sprays compressed gas into the grinding cavity through a Laval nozzle; and the separation module is arranged at the top of the main body and is used for separating the particles in the grinding cavity. According to the utility model, the ascending air flow is blocked by the blocking piece, so that the coarse particle flow in the edge area is settled after touching the blocking piece and is ground again, the load of the separation module is effectively reduced, and the grinding efficiency is improved. And meanwhile, the angle of the hinged blocking piece can be adjusted, so that an operator can adjust the range of blocked upflow, and the adjustability is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of silicon dioxide production technology, and in particular to a supersonic airflow pulverizer for preparing high-purity silicon dioxide. Background Technology

[0002] High-purity silicon dioxide, as a high-performance silicon material, occupies an indispensable position in high-tech fields due to its excellent physical properties, such as scratch resistance, high temperature resistance, and corrosion resistance. It is widely used in the manufacture of quartz glass, integrated circuit boards, optical fiber communication, polycrystalline silicon, and optical instruments.

[0003] In recent years, with the widespread use of high-purity silica in materials, electronics, and pharmaceutical fields, its market demand has become increasingly strong. Different fields have different requirements for the particle size of high-purity silica, which needs to be obtained by grinding. In order not to introduce impurities and reduce purity, grinding is carried out using an air jet mill.

[0004] The working principle of an air jet mill is as follows: Compressed air (or inert gas), after being filtered and dried, is injected at high speed into the grinding zone through a Laval nozzle. At the confluence of multiple high-pressure airflows, the material is repeatedly pulverized through collision, friction, and shearing. The pulverized material, under the suction of a fan, moves with the rising airflow to the separation zone. Under the strong centrifugal force generated by the high-speed rotating classifying turbine, coarse and fine materials are separated. Fine particles that meet the particle size requirements are collected by the classifying wheel into a cyclone separator and dust collector, while coarse particles descend back to the grinding zone for further pulverization. However, since both coarse and fine particles rise, the separation load on the separating wheel is high, resulting in low overall grinding efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a supersonic airflow pulverizer for the preparation of high-purity silica, which solves the problems of high separation load and low grinding efficiency of existing airflow pulverizers.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a supersonic airflow pulverizer for preparing high-purity silica, comprising:

[0007] The main body has a grinding cavity inside;

[0008] The feeding module, located on the main body, conveys the material into the grinding cavity;

[0009] The jet module, positioned around the main body, injects compressed gas into the grinding cavity through Laval nozzles;

[0010] The separation module, located at the top of the main body, separates the particles inside the grinding cavity;

[0011] An adjustment module is located below the separation module. The adjustment module includes a barrier and a support. One end of the support is mounted on the main body, and the other end of the support is hinged to the barrier. At least four barriers are distributed radially along the main body.

[0012] In one embodiment, the barrier is inclined, with the side of the barrier closer to the main axis higher than the side of the barrier farther from the main axis.

[0013] In one embodiment, the barrier includes a first spacer and a second spacer, the second spacer being slidably connected to the first spacer, and the first spacer being connected to a support.

[0014] In one embodiment, the first spacer plate is provided with two second spacer plates, and a spacer wall is provided between the second spacer plates.

[0015] In one embodiment, the longitudinal sections of the first spacer and the second spacer are arc-shaped.

[0016] In one embodiment, the support member is a telescopic rod, with the fixed end of the telescopic rod connected to the main body and the movable end of the telescopic rod connected to the barrier member.

[0017] In one embodiment, the support is hinged to the barrier via a ball joint.

[0018] In one embodiment, the adjustment module further includes a central boss located at the bottom of the main body, the highest point of which is lower than the height of the Laval nozzle.

[0019] In one embodiment, a confluence wall is provided around the central boss, extending from the inner wall of the main body to the bottom of the main body.

[0020] In one embodiment, a spacer ring is provided between the manifold wall and the central boss, and discharge holes are evenly distributed on the spacer ring, with a control valve provided in the discharge holes.

[0021] The beneficial effects of this invention are as follows: This invention uses a blocking component to obstruct the rising airflow, causing coarse particles in the edge area to settle upon contact with the blocking component and be re-grinded, effectively reducing the load on the separation module and improving grinding efficiency. Simultaneously, the hinged blocking component allows for angle adjustment, enabling operators to adjust the range of obstructed rising airflow and enhancing adjustability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0024] Figure 2 This is a top view of an embodiment of the present invention;

[0025] Figure 3 for Figure 2 Adjust the top view after the module is adjusted;

[0026] Figure 4 This is a top view of another embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the spacer in one embodiment of the present invention.

[0028] Label Explanation:

[0029] 1. High-purity silica preparation supersonic airflow pulverizer; 11. Main body; 111. Grinding cavity; 12. Feeding module; 13. Air jet module; 131. Laval nozzle; 14. Separation module; 141. Separation wheel; 142. Separation motor; 143. Discharge pipe; 15. Adjustment module; 151. Barrier component; 1511. First partition plate; 1512. Second partition plate; 1513. First chute; 1514. Partition wall; 152. Support component; 1521. Universal ball; 153. Central boss; 154. Converging wall; 155. Partition annular surface; 156. Discharge hole. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] In the description of this utility model, it should be noted that the terminology... " center ” Vertical ” Horizontal ” "superior ” "Down ” "forward ” "back ” "Left ” "right ” Vertical ” "level ” "top ” "end” "Inside ” "outside ” The orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terminology... " First ” "second ” Used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Please refer to Figures 1 to 5 A supersonic airflow pulverizer 1 for preparing high-purity silica includes: a main body 11, a feeding module 12, an air jet module 13, a separation module 14, and an adjustment module 15.

[0033] The main body 11 has a cylindrical structure and a grinding cavity 111 inside. A feeding module 12 is located in the upper part of the main body 11, conveying material into the grinding cavity 111. An air jet module 13 is arranged around the main body 11, simultaneously injecting compressed gas into the grinding cavity 111 through a Laval nozzle 131. The air jet module 13 is located below the feeding module 12. A separation module 14 is located at the top of the main body 11, separating particles within the grinding cavity 111. Specifically, the separation module 14 includes a separation motor 142 and a separation wheel 141. The separation motor 142 drives the separation wheel 141, located at the top of the grinding cavity 111, to rotate. A discharge pipe 143 is located at the center of the separation wheel 141, conveying the separated material out of the grinding cavity 111.

[0034] An adjustment module 15 is positioned below the separation module 14. The adjustment module 15 includes a blocking element 151 and a support element 152. One end of the support element 152 is mounted on the main body 11, and the other end is hinged to the blocking element 151. At least four blocking elements 151 are distributed radially along the main body 11. Specifically, the high-purity silica preparation supersonic airflow pulverizer 1 is vertically oriented, with the axial direction of the main body 11 being vertical and the radial direction being horizontal. That is, the blocking elements 151 are distributed horizontally, with multiple blocking elements 151 extending from the sidewall of the grinding cavity 111 towards the center of the grinding cavity 111, forming a large-area barrier on the edge region of the grinding cavity 111. The blocking elements 151 obstruct the rising airflow. Coarse particles in the rising airflow fall after contacting the blocking elements 151 and return to the grinding area to continue grinding. Fine particles in the rising airflow concentrate in the central region and do not contact the blocking elements 151. While a few fine particles at the edges lose some kinetic energy upon contact, they can still rise along the gaps between the barrier members 151 with the rising airflow. Operators can adjust the angle of the barrier members 151 as needed to control the size of the blocked area. Simultaneously, adjusting the angle of the barrier members 151 controls the direction of the rising airflow, allowing more material particles to rise with the airflow, thereby controlling the particle size distribution of the material reaching the separation module 14. Furthermore, compared to directly hinged barrier members 151 to the inner wall of the grinding cavity 111, using support members 152 to support barrier members 151 suspends the entire barrier member 151, creating a gap between the edge of the barrier member 151 and the inner wall of the grinding cavity 111. This allows coarse particles separated by the separation module 14 to settle through the gap and be re-ground, preventing the separated coarse particles from depositing on the barrier member 151.

[0035] Understandably, this invention uses the blocking component 151 to block the rising airflow, causing coarse particles in the edge area to settle upon contact with the blocking component 151 and be re-grinded, effectively reducing the load on the separation module 14 and improving grinding efficiency. Simultaneously, the hinged blocking component 151 can be adjusted in angle, allowing operators to adjust the range of the blocked rising airflow, enhancing adjustability.

[0036] In one embodiment, the barrier 151 is inclined, with the side of the barrier 151 closer to the axis of the main body 11 higher than the side of the barrier 151 farther from the axis of the main body 11. That is, the barrier 151 gradually rises from the side wall of the grinding cavity 111 to the center of the grinding cavity 111, blocking coarse particles while reducing the impact on the rising airflow, allowing as many fine particles as possible to rise to the separation module 14, thus improving efficiency.

[0037] In one embodiment, the barrier 151 includes a first spacer 1511 and a second spacer 1512, the second spacer 1512 being slidably connected to the first spacer 1511, and the first spacer 1511 being connected to the support 152. Specifically, the first spacer 1511 has a first groove 1513, and the second spacer 1512 slides within the first groove 1513. This arrangement allows the operator to adjust the gap between the barrier members 151 by adjusting the position of the second spacer 1512, thereby further adjusting the barrier area and enhancing the adjustability of the supersonic airflow pulverizer 1 for high-purity silica preparation.

[0038] In one embodiment, the first partition plate 1511 is provided with two second partition plates 1512, and a partition wall 1514 is provided between the second partition plates 1512. Specifically, the first slide groove 1513 is provided with a partition wall 1514 in the middle, dividing the first slide groove 1513 into two parts, and the two second partition plates 1512 slide on both sides of the partition wall 1514 respectively. This arrangement allows the first partition plate 1511 to provide more support for the second partition plates 1512. After the two second partition plates 1512 are fully extended, the force on the second partition plates 1512 can be evenly transmitted to the first partition plate 1511, preventing the second partition plates 1512 from shaking and loosening, and ensuring the stability of the structure.

[0039] In one embodiment, the longitudinal sections of the first spacer 1511 and the second spacer 1512 are arc-shaped. That is, the first spacer 1511 and the second spacer 1512 are arc-shaped plates. This arrangement allows the rising airflow to partially flow along the inner surface of the arc when it touches the spacer, forming a small airflow circulation, which accelerates the fall of coarse particles and thus improves grinding efficiency.

[0040] In one embodiment, the support member 152 is a telescopic rod, with its fixed end connected to the main body 11 and its movable end connected to the barrier member 151. This arrangement allows the operator to adjust the position of the spacer within the grinding cavity 111, further enhancing the adjustability of the adjustment module 15.

[0041] In one embodiment, the support member 152 is hinged to the barrier member 151 via a ball joint 1521. This configuration enhances the rotational range of the barrier member 151, thereby increasing the adjustability of the adjustment module 15. This allows the barrier member 151 to guide the rising airflow while simultaneously blocking it, creating a spiral airflow as needed to enhance suction. Preferably, the ball joint 1521 is equipped with a locking bolt, allowing the operator to quickly lock the angle of the barrier member 151.

[0042] In one embodiment, the adjustment module 15 further includes a central boss 153, which is disposed at the bottom of the main body 11. The height of the highest point of the central boss 153 is lower than the height of the Laval nozzle 131. Specifically, the central boss 153 is generally conical, guiding the bottom airflow after collision within the grinding cavity 111, so that the bottom airflow merges into the grinding airflow ejected from the Laval nozzle 131. After setting the central boss 153, the adjustment module 15 can guide and adjust the bottom airflow, improving the airflow circulation inside the device. Furthermore, by adjusting the height of the central boss 153, the central boss 153 is prevented from affecting the convergence of grinding airflow, and the grinding airflow is prevented from directly impacting the central boss 153, thus improving the lifespan of the central boss 153. Preferably, the central boss 153 is composed of multiple arc-shaped surfaces that gradually concave towards the axis of the grinding cavity 111, making the guidance of airflow by the central boss 153 smoother and able to carry away the material particles deposited at the bottom.

[0043] In one embodiment, a converging wall 154 is provided around the central boss 153. The converging wall 154 extends from the inner wall of the main body 11 to the bottom of the main body 11. Specifically, the converging wall 154 is composed of multiple arc-shaped walls. Each converging wall 154 is recessed towards the bottom of the main body 11, thereby guiding the airflow and forming a bottom circulation.

[0044] Preferably, in the vertical direction, the projection area of ​​the barrier 151 partially overlaps with the projection area of ​​the confluence wall 154.

[0045] In one embodiment, a spacer annular surface 155 is provided between the confluence wall 154 and the central boss 153. Discharge holes 156 are evenly distributed on the spacer annular surface 155, and a control valve is installed in each discharge hole 156. The spacer annular surface 155 is positioned between the central boss 153 and the confluence wall 154 to buffer the airflow. Simultaneously, the arrangement of the discharge holes 156 and the control valve allows the device to discharge material from the grinding cavity 111 through the discharge holes 156 during continuous grinding, facilitating operations such as sampling by the operator.

[0046] Please refer to Figures 1 to 5 Embodiment 1 of this utility model is: a supersonic airflow pulverizer 1 for preparing high-purity silica, comprising:

[0047] The main body 11 has a grinding cavity 111 inside;

[0048] The feeding module 12 is installed on the main body 11 to transport materials into the grinding cavity 111;

[0049] The jet module 13 is arranged around the main body 11 and injects compressed gas into the grinding cavity 111 through the Laval nozzle 131;

[0050] Separation module 14, located on top of main body 11, separates particles in grinding cavity 111;

[0051] The adjustment module 15 is located below the separation module 14. The adjustment module 15 includes a barrier 151 and a support 152. One end of the support 152 is located on the main body 11, and the other end of the support 152 is hinged to the barrier 151. Four barrier 151s are distributed radially along the main body 11.

[0052] The barrier 151 is inclined, with the side of the barrier 151 closer to the axis of the main body 11 higher than the side of the barrier 151 furthest from the axis of the main body 11. The barrier 151 includes a first partition plate 1511 and a second partition plate 1512, the second partition plate 1512 being slidably connected to the first partition plate 1511, and the first partition plate 1511 being connected to the support member 152. Two second partition plates 1512 are provided on the first partition plate 1511, and a partition wall 1514 is provided between the second partition plates 1512. The longitudinal section of the first partition plate 1511 and the second partition plate 1512 is arc-shaped.

[0053] In this embodiment, the adjustment module 15 also includes a central boss 153, which is located at the bottom of the main body 11, and the height of the highest point of the central boss 153 is lower than the height of the Laval nozzle 131.

[0054] In this embodiment, four sections of confluence walls 154 are provided around the central boss 153. The confluence walls 154 extend from the inner wall of the main body 11 to the bottom of the main body 11. A spacer annular surface 155 is provided between the confluence walls 154 and the central boss 153. Discharge holes 156 are evenly distributed on the spacer annular surface 155, and a control valve is provided in the discharge holes 156.

[0055] The working principle of this utility model is as follows: The operator adjusts the position of the second partition plate 1512 on the first partition plate 1511, and then adjusts the angle of the partition members as a whole so that the four partition members surround and form a ring structure with gaps. After preparation, the high-purity silica to be ground is conveyed into the grinding cavity 111 through the feeding module 12. The jet module 13 uses the Laval nozzle 131 to form a supersonic grinding airflow with compressed gas. The grinding airflow drives the high-purity silica to converge and grind. The separation module 14 generates an upward airflow. The upward airflow carries the ground high-purity silica particles. The barrier 151 blocks the upward airflow, so that the upward airflow in the central area directly reaches the separation module 14. The hollow cavity in the blocked area is driven by the upward airflow to generate a secondary airflow with lower intensity, which carries the material upward. The coarse particles of the material in the secondary airflow settle and are re-ground after touching the barrier 151. The fine particles merge into the upward airflow in the central area and enter the separation module 14. The central boss 153 and the confluence wall 154 form a circulating airflow at the bottom, so that the material deposited at the bottom re-enters the grinding airflow. During the grinding process, the operator opens the control valve to discharge some of the deposited material.

[0056] Although this document uses numerous terms such as supersonic airflow pulverizer, main body, grinding cavity, feeding module, jet module, Laval nozzle, separation module, separation wheel, separation motor, discharge pipe, adjustment module, barrier, first partition plate, second partition plate, first chute, partition wall, support, universal ball, central boss, confluence wall, partition annulus, and discharge hole, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high purity silica production use supersonic jet stream pulverizer (1) characterized by, include: The main body (11) has a grinding cavity (111) inside; The feeding module (12) is installed on the main body (11) to transport materials into the grinding cavity (111); A jet module (13), arranged around the body (11), injects compressed gas into the grinding cavity (111) through a Laval nozzle (131); A separation module (14) is disposed on the top of the main body (11) to separate particles in the grinding cavity (111); An adjustment module (15) is disposed below the separation module (14). The adjustment module (15) includes a barrier (151) and a support (152). One end of the support (152) is disposed on the main body (11), and the other end of the support (152) is hinged to the barrier (151). At least four barriers (151) are distributed radially along the main body (11).

2. The high purity silica production use supersonic jet mill (1) according to claim 1, characterized in that: The barrier (151) is inclined, and the side of the barrier (151) closer to the axis of the main body (11) is higher than the side of the barrier (151) away from the axis of the main body (11).

3. The supersonic airflow pulverizer (1) for preparing high-purity silica according to claim 2, characterized in that: The barrier (151) includes a first partition plate (1511) and a second partition plate (1512), the second partition plate (1512) being slidably connected to the first partition plate (1511), and the first partition plate (1511) being connected to the support member (152).

4. The high purity silica production use supersonic jet stream pulverizer (1) according to claim 3, characterized in that: The first partition plate (1511) is provided with two second partition plates (1512), and a partition wall (1514) is provided between the second partition plates (1512).

5. The high purity silica production use supersonic jet stream pulverizer (1) according to claim 3, characterized in that: The longitudinal sections of the first spacer plate (1511) and the second spacer plate (1512) are arc-shaped.

6. The high purity silica production use supersonic jet stream pulverizer (1) according to claim 1, characterized in that: The support member (152) is a telescopic rod, the fixed end of which is connected to the main body (11), and the movable end of which is connected to the barrier member (151).

7. The high purity silica production use supersonic jet stream pulverizer (1) according to claim 1, characterized in that: The support member (152) is hinged to the barrier member (151) via a ball joint (1521).

8. The supersonic airflow pulverizer (1) for preparing high-purity silica according to claim 1, characterized in that: The adjustment module (15) also includes a central boss (153), which is located at the bottom of the main body (11), and the height of the highest point of the central boss (153) is lower than the height of the Laval nozzle (131).

9. The high purity silica production use supersonic jet stream pulverizer (1) according to claim 8, characterized in that: A confluence wall (154) is provided around the central boss (153), the confluence wall (154) extending from the inner wall of the body (11) to the bottom of the body (11).

10. The high purity silica production use supersonic jet stream pulverizer (1) according to claim 9, characterized in that: A spacer annular surface (155) is provided between the manifold wall (154) and the central boss (153). Discharge holes (156) are evenly distributed on the spacer annular surface (155), and a control valve is provided in the discharge hole (156).

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