A device for homogenizing the particle size of flaky ammonium bifluoride based on airflow crushing

Abstract

The utility model belongs to flaky ammonium bifluoride granularity homogenization device technical field, disclose a kind of flaky ammonium bifluoride granularity homogenization device based on airflow crushing, including installation frame, 6 supersonic nozzles of airflow crushing chamber inner wall uniform distribution form multidirectional high-speed airflow field, can be fully collided and crushed to flaky ammonium bifluoride, reduce the uneven crushing caused by initial form difference;The rotating speed of variable frequency grading wheel of grading mechanism can be adjusted in the range of 500-3000r / min, can accurately screen the granules of different granularity requirements, cooperate with coarse powder backflow pipe to send the coarse granules that do not reach the standard obliquely back to crushing chamber secondary processing, avoid excessive crushing or crushing insufficient, reduce the number of cycle processing, improve efficiency;The arc spiral agitator 60-120r / min in homogenization bin and the low-pressure airflow of airflow disturbance port are synergistic, secondary mixing homogenization is carried out to the granules after grading, break the particle agglomeration, so that finished product granularity is more uniform.

Description

Technical Field

[0001] This utility model relates to the technical field of flake ammonium fluoride particle size homogenization device, and in particular to a flake ammonium fluoride particle size homogenization device based on airflow pulverization. Background Technology

[0002] Flake ammonium bifluoride, as an important chemical raw material, is widely used in glass etching, metal surface treatment, and other fields. Its particle size uniformity directly affects the product's performance and processing precision. Currently, the pulverization of flake ammonium bifluoride mostly employs air jet milling technology, utilizing high-speed airflow (usually compressed air or inert gas) to drive the material particles through collisions and friction to achieve pulverization. However, existing equipment has the following problems: Uneven particle size distribution after pulverization: Due to differences in the initial morphology of the flaky materials, some particles are over-pulverized into fine powder, while others remain largely flaky, requiring multiple cycles and resulting in low efficiency. Furthermore, the lack of a targeted homogenization structure leads to direct collection of pulverized material without secondary homogenization, resulting in significant deviations in the finished product particle size. The equipment also suffers from insufficient corrosion resistance; ammonium bifluoride is highly corrosive, easily damaging ordinary metal parts and affecting the equipment's lifespan and material purity. Additionally, the classification accuracy is low; traditional classifiers operate at fixed speeds, making it difficult to adapt to different particle size requirements, and the return path for coarse particles after classification is unreasonable, easily causing secondary pollution. Therefore, we propose a particle size homogenization device for flaky ammonium bifluoride based on airflow pulverization. Utility Model Content

[0003] The purpose of this invention is to provide a particle size homogenization device for flake ammonium bifluoride based on airflow pulverization, which solves the existing problems.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A particle size homogenization device for flake ammonium bifluoride based on airflow pulverization includes a corrosion-resistant body, an inclined feed pipe, an airflow pulverization chamber, a high-pressure gas source pipeline, a grading mechanism, a homogenization bin, and a bag filter. The corrosion-resistant body is made of 316L stainless steel and lined with a polytetrafluoroethylene (PTFE) coating. It has a feed inlet at the top and a finished product outlet at the bottom. One end of the inclined feed pipe is connected to the feed inlet, and the other end is connected to the airflow pulverization chamber. The airflow pulverization chamber is located at the bottom of the corrosion-resistant body, and its inner wall is evenly distributed with six supersonic nozzles. The high-pressure gas source pipeline connects the supersonic nozzles to an external high-pressure gas source. The grading mechanism is located above the airflow pulverization chamber. The homogenization bin is located above the grading mechanism. The bag filter is connected to the top of a cyclone separator via a pipeline and has PTFE filter bags inside.

[0005] Preferably, the grading mechanism includes a variable frequency grading wheel and a coarse powder return pipe. The variable frequency grading wheel is driven by a speed-regulating motor with a rotational speed range of 500-3000 r / min. One end of the coarse powder return pipe is connected to the outside of the grading wheel, and the other end is obliquely connected to the lower part of the airflow pulverizing chamber. The inside of the pipe is provided with an anti-sticking coating.

[0006] Preferably, the homogenization chamber has an airflow disturbance port on its side wall, which is connected to a low-pressure gas source pipeline, and a gas distribution plate is provided at the port; the homogenization chamber is equipped with a spiral stirrer with a rotation speed of 60-120 r / min and an arc-shaped blade.

[0007] Preferably, the inclined feed pipe has an angle of 30° with the horizontal plane, a smooth inner wall, and a magnetic separator embedded inside the pipe, wherein the magnetic separator is a strong magnetic permanent magnet.

[0008] Preferably, the high-pressure gas source pipeline is equipped with a pressure regulating valve, and the low-pressure gas source pipeline is equipped with a flow control valve; pressure monitoring instruments are respectively installed in the high-pressure gas source pipeline, the low-pressure gas source pipeline and the airflow pulverizing chamber.

[0009] Preferably, the bag filter is equipped with an induced draft fan at the top, and the induced draft fan is a variable frequency speed control type; the bag filter is provided with a fine powder collection box at the bottom, and the fine powder collection box is a drawer-type structure made of polytetrafluoroethylene.

[0010] Preferably, it also includes a PLC control system, which is electrically connected to the speed-regulating motor, induced draft fan, and pressure monitoring instrument of the grading mechanism, and can set and adjust operating parameters.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention relates to a particle size homogenization device for flake ammonium bifluoride based on airflow pulverization. Six supersonic nozzles evenly distributed on the inner wall of the airflow pulverization chamber create a multi-directional high-speed airflow field, which can fully collide and pulverize the flake ammonium bifluoride, reducing uneven pulverization caused by differences in initial morphology. The variable frequency classifying wheel of the classifying mechanism can adjust its speed within the range of 500-3000 r / min, accurately screening particles with different particle size requirements. Combined with the coarse powder return pipe, substandard coarse particles are obliquely sent back to the pulverization chamber for secondary processing, avoiding over-pulverization or insufficient pulverization, reducing the number of processing cycles, and improving efficiency. The arc-shaped spiral stirrer inside the homogenization chamber, operating at 60-120 r / min, works synergistically with the low-pressure airflow introduced through the airflow disturbance port to perform secondary mixing and homogenization of the classified particles, breaking up particle agglomeration and resulting in a more uniform particle size in the finished product. This invention relates to a particle size equalization device for flake ammonium bifluoride based on airflow pulverization. The corrosion-resistant body is made of 316L stainless steel with a PTFE coating. The PTFE filter bags and fine powder collection box in the baghouse dust collector are also made of PTFE, which can withstand the strong corrosiveness of ammonium bifluoride and prevent ordinary metal parts from being corroded. All parts in contact with the material are designed with corrosion resistance, extending the device's service life and preventing material contamination by metal impurities, ensuring material purity. The variable frequency classifying wheel of the classifying mechanism can flexibly adjust its speed from 500-3000 r / min via a speed-regulating motor to adapt to different particle size requirements, overcoming the limitations of the fixed speed of traditional classifying wheels. The coarse powder return pipe is obliquely connected to the lower part of the airflow pulverization chamber and has an anti-sticking coating inside, ensuring a reasonable return path for coarse particles, reducing residue accumulation, and avoiding secondary contamination of the pulverized material. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the rear view portion of this utility model; Figure 3 This is a three-dimensional structural diagram of the cross-section of this utility model; Figure 4 This is a partial three-dimensional structural diagram of the present utility model.

[0014] In the diagram: 1. Corrosion-resistant body; 2. Inclined feed pipe; 3. Airflow pulverizing chamber; 4. High-pressure air source pipeline; 5. Classification mechanism; 6. Coarse powder return pipe; 7. Homogenization bin; 8. Airflow disturbance port; 9. Low-pressure air source pipeline; 10. Cyclone separator; 11. Return valve; 12. Bag filter; 13. Exhaust fan; 14. Magnetic separator; 15. Pressure monitor; 16. PLC control system; 17. Fine powder collection box. Detailed Implementation

[0015] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] refer to Figure 1-4 A particle size homogenization device for flake ammonium bifluoride based on airflow pulverization includes a corrosion-resistant body 1, an inclined feed pipe 2, an airflow pulverization chamber 3, a high-pressure gas source pipe 4, a grading mechanism 5, a homogenization bin 7, and a bag filter 12. The corrosion-resistant body 1 is made of 316L stainless steel and lined with a polytetrafluoroethylene coating. It has a feed inlet at the top and a finished product outlet at the bottom. One end of the inclined feed pipe 2 is connected to the feed inlet, and the other end is connected to the airflow pulverization chamber 3. The airflow pulverization chamber 3 is located at the lower part of the corrosion-resistant body 1, and its inner wall is evenly distributed with six supersonic nozzles. The high-pressure gas source pipe 4 connects the supersonic nozzles to an external high-pressure gas source. The grading mechanism 5 is located above the airflow pulverization chamber 3. The homogenization bin 7 is located above the grading mechanism 5. The bag filter 12 is connected to the top of a cyclone separator 10 via a pipe and has a polytetrafluoroethylene filter bag inside. Six supersonic nozzles evenly distributed on the inner wall of the crushing chamber 3 form a multi-directional high-speed airflow field, which can fully collide and crush the flake ammonium bifluoride, reducing uneven crushing caused by differences in initial morphology. The variable frequency classifying wheel of the classification mechanism 5 can be adjusted within the range of 500-3000 r / min, which can accurately screen particles with different particle size requirements. In conjunction with the coarse powder return pipe 6, the coarse particles that do not meet the standards are obliquely sent back to the crushing chamber for secondary processing, avoiding over-crushing or insufficient crushing, reducing the number of cycles, and improving efficiency. In this embodiment, the classification mechanism 5 includes a variable frequency classifying wheel and a coarse powder return pipe 6. The variable frequency classifying wheel is driven by a speed-regulating motor with a speed range of 500-3000 r / min. One end of the coarse powder return pipe 6 is connected to the outside of the classifying wheel, and the other end is obliquely connected to the lower part of the airflow crushing chamber 3. The pipe is equipped with an anti-stick coating.

[0017] In this embodiment, the homogenization chamber 7 has an airflow disturbance port 8 on its side wall, which is connected to the low-pressure gas source pipe 9. A gas distribution plate is provided at the port. The homogenization chamber 7 is equipped with a spiral stirrer with a speed of 60-120 r / min and an arc-shaped blade. The arc-shaped spiral stirrer inside the homogenization chamber 7, operating at 60-120 r / min, works synergistically with the low-pressure airflow introduced through the airflow disturbance port 8 to perform secondary mixing and homogenization on the graded particles, breaking up particle agglomeration and making the finished product particle size more uniform. The gas distribution plate at the airflow disturbance port ensures uniform airflow diffusion, further improving the homogenization effect and solving the problem of large particle size deviation in the finished product caused by the lack of homogenization structure in traditional devices. In this embodiment, the inclined feed pipe 2 has an angle of 30° with the horizontal plane, a smooth inner wall, and a magnetic separator 14 embedded inside the pipe. The magnetic separator 14 is a strong magnetic permanent magnet.

[0018] In this embodiment, a pressure regulating valve is installed on the high-pressure gas source pipeline 4, and a flow control valve is installed on the low-pressure gas source pipeline 9; pressure monitoring instruments 15 are respectively installed in the high-pressure gas source pipeline 4, the low-pressure gas source pipeline 9, and the airflow pulverizing chamber 3; the variable frequency classifying wheel of the classifying mechanism 5 can flexibly adjust the speed from 500 to 3000 r / min through a speed regulating motor to adapt to different particle size requirements and solve the limitation of the fixed speed of the traditional classifying wheel; the coarse powder return pipe 6 is obliquely connected to the lower part of the airflow pulverizing chamber 3 and is equipped with an anti-sticking coating inside the pipe to ensure that the return path of coarse particles is reasonable, reduce residual accumulation, and avoid secondary pollution to the pulverized material.

[0019] In this embodiment, an induced draft fan 13 is installed on the top of the bag filter 12. The induced draft fan 13 is a variable frequency speed control type. A fine powder collection box 17 is provided at the bottom of the bag filter 12. The fine powder collection box 17 has a drawer-type structure and is made of polytetrafluoroethylene (PTFE). The corrosion-resistant body 1 is made of 316L stainless steel and lined with PTFE coating. The PTFE filter bags inside the bag filter 12 and the PTFE material of the fine powder collection box 17 can withstand the strong corrosion of ammonium bifluoride, avoiding corrosion of ordinary metal parts. All parts in contact with materials are designed with corrosion resistance, which not only extends the service life of the device but also prevents the material from being contaminated by metal impurities, ensuring the purity of the material. In this embodiment, a PLC control system 16 is also included. The PLC control system 16 is electrically connected to the speed-regulating motor of the grading mechanism 5, the induced draft fan 13, and the pressure monitoring instrument 15, and can set and adjust the operating parameters.

[0020] The implementation principle of the flake ammonium fluoride particle size homogenization device based on airflow pulverization in this embodiment is as follows: Six supersonic nozzles evenly distributed on the inner wall of the airflow pulverization chamber 3 form a multi-directional high-speed airflow field, which can fully collide and pulverize the flake ammonium fluoride, reducing uneven pulverization caused by differences in initial morphology; the variable frequency grading wheel speed of the grading mechanism 5 can be adjusted within the range of 500-3000 r / min, which can accurately screen particles with different particle size requirements. With the help of the coarse powder return pipe 6, the coarse particles that do not meet the standards are obliquely sent back to the pulverization chamber for secondary processing, avoiding over-pulverization or insufficient pulverization, reducing the number of cycles, and improving efficiency; The arc-shaped spiral stirrer inside the homogenization chamber 7, operating at 60-120 r / min, works in conjunction with the low-pressure airflow introduced through the airflow disturbance port 8 to perform secondary mixing and homogenization of the graded particles, breaking up particle agglomeration and making the finished product particle size more uniform. The gas distribution plate at the airflow disturbance port ensures uniform airflow diffusion, further improving the homogenization effect and solving the problem of large particle size deviation in the finished product caused by the lack of homogenization structure in traditional devices. The corrosion-resistant body 1 is made of 316L stainless steel and lined with polytetrafluoroethylene (PTFE). The PTFE filter bags in the bag filter 12 and the fine powder collection box 17 are also made of PTFE, which can withstand the strong corrosion of ammonium bifluoride and prevent ordinary metal parts from being corroded. All parts that come into contact with materials are designed to be corrosion-resistant, which not only extends the service life of the device but also prevents the material from being contaminated by metal impurities, ensuring the purity of the material. The variable frequency classifying wheel of the classifying mechanism 5 can be flexibly adjusted in speed from 500 to 3000 r / min by a speed-regulating motor to adapt to different particle size requirements and solve the limitation of the fixed speed of traditional classifying wheels. The coarse powder return pipe 6 is obliquely connected to the lower part of the airflow pulverizing chamber 3 and is equipped with an anti-stick coating inside the pipe to ensure that the return path of coarse particles is reasonable, reduce residual accumulation, and avoid secondary pollution to the pulverized material.

[0021] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] The foregoing has provided a detailed description of the particle size homogenization device for flake ammonium bifluoride based on airflow pulverization provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A device for homogenizing the particle size of flake ammonium bifluoride based on airflow pulverization, characterized in that, The system includes a corrosion-resistant body (1), an inclined feed pipe (2), an airflow pulverizing chamber (3), a high-pressure air source pipe (4), a grading mechanism (5), a homogenization chamber (7), and a bag filter (12). The corrosion-resistant body (1) is made of 316L stainless steel and lined with polytetrafluoroethylene coating. It has a feed inlet at the top and a finished product outlet at the bottom. One end of the inclined feed pipe (2) is connected to the feed inlet, and the other end is connected to the airflow pulverizing chamber (3). The airflow pulverizing chamber (3) is located at the bottom of the corrosion-resistant body (1) and has 6 supersonic nozzles evenly distributed on its inner wall. The high-pressure air source pipe (4) connects the supersonic nozzles to an external high-pressure air source. The grading mechanism (5) is located above the airflow pulverizing chamber (3). The homogenization chamber (7) is located above the grading mechanism (5). The bag filter (12) is connected to the top of the cyclone separator (10) through a pipe and has polytetrafluoroethylene filter bags inside.

2. The particle size homogenization device for flake ammonium bifluoride based on airflow pulverization according to claim 1, characterized in that, The grading mechanism (5) includes a variable frequency grading wheel and a coarse powder return pipe (6). The variable frequency grading wheel is driven by a speed-regulating motor with a rotation speed range of 500-3000 r / min. One end of the coarse powder return pipe (6) is connected to the outside of the grading wheel, and the other end is obliquely connected to the lower part of the airflow pulverizing chamber (3). The pipe is provided with an anti-stick coating.

3. The particle size homogenization device for flake ammonium bifluoride based on airflow pulverization according to claim 1, characterized in that, The homogenization chamber (7) has an airflow disturbance port (8) on its side wall. The airflow disturbance port (8) is connected to the low-pressure gas source pipeline (9), and a gas distribution plate is provided at the port. The homogenization chamber (7) is equipped with a spiral stirrer with a speed of 60-120 r / min and an arc-shaped blade.

4. The particle size homogenization device for flake ammonium bifluoride based on airflow pulverization according to claim 1, characterized in that, The inclined feed pipe (2) has an angle of 30° with the horizontal plane, and its inner wall is smooth. A magnetic separator (14) is embedded in the pipe. The magnetic separator (14) is a strong magnetic permanent magnet.

5. The particle size homogenization device for flake ammonium bifluoride based on airflow pulverization according to claim 3, characterized in that, The high-pressure gas source pipeline (4) is equipped with a pressure regulating valve, and the low-pressure gas source pipeline (9) is equipped with a flow control valve; pressure monitoring instruments (15) are installed in the high-pressure gas source pipeline (4), the low-pressure gas source pipeline (9) and the airflow pulverizing chamber (3).

6. The particle size homogenization device for flake ammonium bifluoride based on airflow pulverization according to claim 1, characterized in that, The bag filter (12) is equipped with an induced draft fan (13) at the top, and the induced draft fan (13) is a variable frequency speed control type; the bag filter (12) is provided with a fine powder collection box (17) at the bottom, and the fine powder collection box (17) is a drawer-type structure and is made of polytetrafluoroethylene.

7. The particle size homogenization device for flake ammonium bifluoride based on airflow pulverization according to claim 1, characterized in that, It also includes a PLC control system (16), which is electrically connected to the speed-regulating motor, induced draft fan (13), and pressure monitoring instrument (15) of the grading mechanism (5), and can set and adjust operating parameters.

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