Double-circulation collision system and method adopting centrifugal machine-gear disc powder feeding structure

Abstract

The invention discloses a double-circulation collision system and method adopting a centrifugal machine-gear disc powder feeding structure, and belongs to the technical field of material preparation. The system mainly comprises a main circulation pipeline, a secondary circulation pipeline and a particle grading device. A motor capable of controlling the rotating speed is arranged on a gear disc in the secondary circulation pipeline, the rotating speed of the gear disc can be controlled, and then the coarse particle powder feeding amount of the gear disc is accurately controlled. The high-speed ejection direction of the coarse particles in the centrifugal machine is the tangential direction of the centrifugal machine, and the ejection direction of the centrifugal machine in the tangential direction is perpendicular to and intersects with the axis of the collision chamber, so that the coarse particles sent out by the centrifugal machine can break through an airflow boundary layer on the inner wall face of the collision chamber at the maximum speed and then enter a core area of the collision chamber. And the collision probability and efficiency of coarse particles and fine particles of the powder are increased.

Description

Technical Field

[0001] This invention relates to the field of materials preparation technology, and in particular to a dual-circulation collision system and method using a centrifuge-gear disk powder feeding structure. Background Technology

[0002] Low-temperature solid-state reaction synthesis technology is a rapidly developing new technology in the field of materials preparation in recent years. Its core feature is that energy transfer is completed at room temperature or low temperature. In specific operation, mechanical energy is injected into the powder reactant system through methods such as mechanical grinding. This mechanical energy is converted into the chemical energy of the reaction system, thereby realizing solid-state synthesis under room temperature or low temperature conditions. Introducing mechanical energy into the system to induce the reaction is a necessary condition for the realization of low-temperature solid-state synthesis reaction. Supersonic airflow acceleration technology is widely used. Its basic principle is: using a supersonic nozzle to generate a high-speed airflow, the materials participating in the reaction are sent into the airflow acceleration channel. The materials are accelerated and collide in the channel. In this process, the mechanical energy of the materials is converted into chemical energy, realizing the preparation of materials.

[0003] When using gas to accelerate materials, the choice of air intake and feeding methods is crucial, significantly impacting material conveying efficiency, airflow acceleration efficiency, material collision probability, and synthesis reaction capacity. Existing air intake and feeding methods primarily include axial intake and lateral feeding. In lateral feeding, the reactants enter the airflow acceleration channel through a lateral material inlet. The high-speed airflow generated by the supersonic nozzle accelerates the material, which then collides with the target head. The design logic of this method utilizes the relatively low static pressure at the nozzle exit to facilitate particle addition. However, in practical applications, this method has significant shortcomings: when the inlet airflow pressure of the supersonic nozzle is high, the pressure at the material inlet exceeds atmospheric pressure, preventing the material from smoothly entering the airflow acceleration channel; if the inlet airflow pressure of the supersonic nozzle is reduced, the high-speed airflow downstream of the nozzle becomes difficult to maintain stably. In addition, when feeding from the outer wall, the flow velocity in the boundary layer of the airflow is low while the flow velocity in the core flow zone is high. Furthermore, the particles have a certain radial velocity when they enter, which makes the material easy to move with the airflow and accumulate in the boundary layer of the channel wall. The material particles are difficult to enter the core flow zone of the collision chamber, resulting in low collision efficiency and difficulty in effectively introducing mechanical energy to induce the reaction.

[0004] Disadvantages of existing technology: The patent titled "Reverse-Air Spiral Powder Feeding Device and Dual-Circulation Collision System and Method Based thereon" (application number: CN119190743A) solves the problem of low velocity difference between mixed target powders and poor collision effect. However, the airflow in the main circulation pipeline carrying fine particles forms a shock wave in front of the target head, which reduces the velocity of the fine powder particles at the target head, thereby reducing the impact effect of coarse / fine powder particles. Furthermore, this invention cannot control the amount of coarse powder fed.

[0005] The patent titled "Embedded Composite Powder Material Preparation Device and Method Based on Gas-Accelerated Synthesis" (application number: CN118663564A) has the following drawbacks: Although a feeding pipe is provided, the inner surface of the feeding pipe from the particle classification device to the outlet is either straight or tapered. This results in a low velocity of coarse particles entering the collision chamber, and the coarse powder particles may still remain within the fluid boundary layer on the inner wall of the collision chamber, leading to a still low collision efficiency between coarse and fine particles. Furthermore, this invention cannot control the amount of coarse powder fed. Summary of the Invention

[0006] The purpose of this invention is to provide a dual-circulation collision system and method with a centrifuge-gear disk powder feeding structure to address the above-mentioned shortcomings, thereby solving the problems in the prior art where coarse powder particles cannot efficiently enter the main airflow of the collision system and cannot achieve precise feeding.

[0007] This invention is achieved through the following scheme: A dual-circulation collision system employing a centrifuge-gear disc powder feeding structure includes a main circulation pipeline, a particle classification device, and a secondary circulation pipeline. A particle acceleration structure is installed in the main circulation pipeline. The particle classification device is connected to the main circulation pipeline. One end of the secondary circulation pipeline is connected to the coarse particle outlet of the particle classification device, and the other end extends into the collision chamber of the main circulation pipeline. The secondary circulation pipeline contains a centrifuge for accelerating coarse powder particles and a gear disc for controlling the powder feeding rate of coarse particles.

[0008] Based on the structure of the dual-circulation collision system using a centrifuge-gear disk powder feeding structure, the main circulation pipeline includes a stabilization section, a supersonic jet section, an acceleration section, a collision chamber, a circulation pipeline, and a gas source; the stabilization section, the supersonic jet section, the acceleration section, the collision chamber, and the circulation pipeline are sequentially connected to form a loop; the gas source is located on the front side wall of the stabilization section; the particle classification device is connected to the circulation pipeline, and the particle classification device includes multiple outlet ends, including at least a fine particle outlet, a coarse particle outlet, and a product outlet; the coarse particle outlet is connected to the secondary circulation pipeline, the fine particle outlet is connected to the circulation pipeline, and the product outlet is connected to the product recovery device.

[0009] Based on the structure of the dual-circulation collision system using a centrifuge-gear disk powder feeding structure, a product recovery device is also provided in the main circulation pipeline. The product recovery device is located in the circulation pipeline, and the particle classification device is provided with a product outlet, which is connected to the product recovery device.

[0010] Based on the structure of the dual-circulation collision system using a centrifuge-gear disk powder feeding structure, a target head is provided in the collision chamber, and the target head is collinear with the center of the fine particle powder flow in the main circulation pipeline.

[0011] Based on the structure of the above-mentioned dual-circulation collision system using a centrifuge-gear disc powder feeding structure, the gear disc is located at the end of the secondary circulation pipeline near the particle classification device, and the centrifuge is located at the end of the secondary circulation pipeline near the collision chamber.

[0012] Based on the structure of the above-mentioned dual-circulation collision system using a centrifuge-gear disk powder feeding structure, the gear disk includes a first rotating tooth, a second rotating tooth, and a power mechanism; the first rotating tooth and the second rotating tooth mesh with each other; the size of the first rotating tooth and the second rotating tooth after meshing is the diameter of the secondary circulation pipe, so that the powder feeding structure formed by the first rotating tooth and the second rotating tooth completely covers the secondary circulation pipe; the power mechanism is connected to the first rotating tooth and the second rotating tooth respectively.

[0013] Based on the structure of the above-mentioned dual-circulation collision system using a centrifuge-gear disk powder feeding structure, the inlet of the centrifuge is connected to the gear disk, the inlet of the centrifuge is located on the central axis of the centrifuge, and the central axis of the outlet of the centrifuge is collinear with the central axis of the collision chamber section, so that the direction of the high-speed ejection of coarse particles in the centrifuge is the tangential direction of the centrifuge.

[0014] This solution also provides a dual-cycle collision method using a centrifuge-gear disk powder feeding structure, including the following steps: Step 1: Weigh a certain amount of solid powder particles according to the mass ratio to prepare a solid powder particle mixture.

[0015] Step 2: Use an air source to create a supersonic airflow in the main circulation pipeline and the secondary circulation pipeline.

[0016] Step 3: Throw the prepared solid-phase powder-particle mixture into a supersonic airflow.

[0017] Step 4: The solid-phase powder particle mixture is accelerated sequentially through the stabilization section, the supersonic nozzle section, and the acceleration section of the main circulation pipeline under the entrainment of the supersonic airflow.

[0018] Step 5: After the solid-phase powder particle mixture collides with the target head in the collision chamber, it enters the particle classification device along the main circulation pipeline. The particle classification device classifies the solid-phase powder particle mixture. Fine particles that do not meet the requirements return to the upstream of the main circulation pipeline through the fine particle outlet of the particle classification device to continue to circulate, accelerate, and collide. Products that meet the requirements enter the product recovery unit, and coarse particles enter the secondary circulation pipeline.

[0019] Step Six: The coarse particles separated by the particle grading device enter the collision chamber after passing through the gear disk and centrifuge in the secondary circulation pipeline; the speed of the gear disk is adjusted by the motor connected to the central shaft, which can control the speed of the gear disk, thereby precisely controlling the amount of coarse particles fed; the coarse particles fed into the centrifuge through the gear disk are ejected from the centrifuge at high speed in the tangential direction under the action of the centrifugal force, and then ejected into the collision chamber at high speed.

[0020] Step 7: The coarse particles accelerated by the centrifuge collide with the fine particles accelerated by the main circulation pipeline.

[0021] Step 8: Repeat this process until the desired product is obtained, then turn off the gas supply.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In the main circulation pipeline, the powder particles are accelerated by a particle acceleration structure. The particle classification device is used to separate the coarse and fine particles of the powder in the main circulation pipeline. The separated coarse particles are accelerated through the secondary circulation pipeline and then enter the collision chamber. The separated fine particles are accelerated to supersonic speed by the particle acceleration structure in the main circulation pipeline. The accelerated coarse and fine powder particles collide in the collision chamber.

[0023] 1. In this invention, a gear disk is installed in the secondary circulation pipeline. The gear disk is connected to a motor with controllable rotation speed, which can control the rotation speed of the gear disk, thereby precisely controlling the amount of coarse powder fed by the gear disk. The precise ratio of coarse to fine powder feeding can effectively improve the collision probability.

[0024] 2. In this invention, a centrifuge is installed in the secondary circulation pipeline. The separated coarse particles are accelerated by the centrifuge in the secondary circulation pipeline and then enter the collision chamber of the main circulation pipeline. The direction in which the coarse particles are ejected at high speed from the centrifuge is tangential to the centrifuge. The direction in which the centrifuge ejects the particles tangentially is perpendicular to and intersects the axis of the collision chamber. This allows the coarse particles ejected from the centrifuge to break through the airflow boundary layer on the inner wall of the collision chamber at maximum speed, and then enter the core area of ​​the collision chamber, increasing the collision probability and efficiency between coarse and fine particles of the powder.

[0025] 3. Under the same conditions, supersonic airflow and powder particles exhibit higher entrainment and acceleration efficiency for fine particles, but lower efficiency for coarse particles. In this invention, coarse particles separated from fine particles are accelerated using a centrifuge, rather than through airflow acceleration, resulting in higher acceleration efficiency. This allows coarse particles to break through the airflow boundary layer on the collision chamber wall, thereby improving the collision efficiency between coarse and fine particles. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the location of the centrifuge in this invention; Figure 3 This is a schematic diagram of the gear disk in the present invention; Reference numerals: 1. Main circulation pipeline; 2. Particle classification device; 3. Secondary circulation pipeline; 101. Air source; 102. Stabilization section; 103. Supersonic nozzle section; 104. Acceleration section; 105. Collision chamber; 106. Target head; 107. Product recovery device; 108. Circulation pipeline; 301. Gear disk; 302. Centrifuge; 303. First rotating gear; 304. Second rotating gear. Detailed Implementation

[0027] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0028] Any feature disclosed in this specification (including any appended claims and abstract) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0029] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a predetermined orientation, or be constructed and operated in a predetermined orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0031] Example 1 like Figures 1-3 As shown, the present invention provides a technical solution: A dual-circulation collision system employing a centrifuge-gear disc powder feeding structure includes, but is not limited to, a main circulation pipeline 1, a particle classification device 2, and a secondary circulation pipeline 3. The main circulation pipeline 1 is equipped with a particle acceleration structure. The particle classification device 2 is connected to the main circulation pipeline 1. One end of the secondary circulation pipeline 3 is connected to the coarse particle outlet of the particle classification device 2, and the other end extends into the collision chamber 105 of the main circulation pipeline 1. The secondary circulation pipeline 3 is equipped with a centrifuge 302 for accelerating coarse powder particles and a gear disc 301 for controlling the powder feeding rate of coarse particles.

[0032] Based on the above structure, the powder particles are accelerated by a particle acceleration structure in the main circulation pipeline 1. The particle classification device 2 is used to separate the coarse and fine particles of the powder in the main circulation pipeline 1. The separated coarse particles are accelerated through the secondary circulation pipeline 3 and then enter the collision chamber 105. The separated fine particles are accelerated to a supersonic state by the particle acceleration structure in the main circulation pipeline 1. The accelerated coarse and fine powder particles collide in the collision chamber 105. In this invention, a gear disk 301 is provided in the secondary circulation pipeline 3. The gear disk 301 is connected to a motor with controllable rotation speed, which can control the rotation speed of the gear disk 301, thereby precisely controlling the amount of coarse powder fed by the gear disk 301. The precise ratio of coarse and fine powder feeding can effectively improve the collision probability. In this invention, a centrifuge 302 is provided in the secondary circulation pipeline 3. The separated coarse particles are accelerated by the centrifuge 302 in the secondary circulation pipeline 3 and then enter the collision chamber 105 of the main circulation pipeline 1. The direction in which coarse particles are ejected at high speed from centrifuge 302 is tangential to centrifuge 302. This tangential ejection direction is perpendicular to and intersects the axis of collision chamber 105. This allows the coarse particles ejected from centrifuge 302 to break through the airflow boundary layer on the inner wall of collision chamber 105 at maximum speed, thus entering the core region of collision chamber 105 and increasing the collision probability and efficiency between coarse and fine particles. Under the same conditions, supersonic airflow and powder particles exhibit higher entrainment and acceleration efficiency for fine particles but lower efficiency for coarse particles. In this invention, by using centrifuge 302 to accelerate the separated coarse particles, rather than through airflow acceleration, higher acceleration efficiency is achieved, enabling the coarse particles to break through the airflow boundary layer on the inner wall of collision chamber 105, thereby improving the collision efficiency between coarse and fine particles.

[0033] As an example, the main circulation pipeline 1 includes a stabilization section 102, a supersonic jet section 103, an acceleration section 104, a collision chamber 105, a circulation pipe 108, and a gas source 101; the stabilization section 102, the supersonic jet section 103, the acceleration section 104, the collision chamber 105, and the circulation pipe 108 are sequentially connected to form a loop; the gas source 101 is located on the front side wall of the stabilization section 102; the particle classification device 2 is connected to the circulation pipe 108, and the particle classification device 2 includes multiple outlet ends, including at least a fine particle outlet, a coarse particle outlet, and a product outlet; the coarse particle outlet is connected to the secondary circulation pipeline 3, the fine particle outlet is connected to the circulation pipe 108, and the product outlet is connected to the product recovery device 107.

[0034] A product recovery device 107 may also be installed in the main circulation pipeline 1. The product recovery device 107 is installed in the circulation pipeline 108 and is used to recover embedded composite powder that meets the conditions.

[0035] As a more specific embodiment, the particle classification device 2 may be provided with a product outlet, which is connected to the product recycler 107.

[0036] In this embodiment, the stabilization section 102 is used to control the energy of the supersonic airflow in the main circulation pipeline 1; the supersonic nozzle 103 is used to accelerate the airflow in the main circulation pipeline 1 to supersonic speed; the acceleration section 104 is used to accelerate fine particles in the main circulation pipeline 1; the collision chamber 105 is used for collision reactions of different raw materials; the classification device is used to separate particles of different sizes; the product recovery device 107 is used to recover products that meet the conditions; the circulation pipeline 108 is used for repeated circulation acceleration and collision of solid particles that do not meet the requirements; and the air source 101 is used to provide power for the airflow of the device. The secondary circulation pipeline 3 is used for coarse powder particles separated from the particle classification device 2 to enter the collision chamber 105.

[0037] As an example, a target head 106 can be set in the collision chamber 105, the target head 106 being collinear with the center of the fine particle powder flow in the main circulation pipeline 1; the target head 106 is used for solid particle collision.

[0038] As an example, the gear disk 301 is disposed on the secondary circulation pipeline 3 near the end of the particle classification device 2, and the centrifuge 302 is disposed on the secondary circulation pipeline 3 near the end of the collision chamber 105.

[0039] Based on the above structure, the coarse powder particles are separated and fed into the secondary circulation pipeline 3 by the particle classification device 2. The amount of coarse powder fed into the centrifuge 302 is controlled by the gear disk 301, so that the amount of coarse powder particles entering the centrifuge 302 is adjustable. Finally, the coarse powder particles are injected at high speed into the collision chamber 105 under the action of the centrifuge 302 and collide with the fine powder particles.

[0040] As an example, the gear disk 301 includes a first rotating tooth 303, a second rotating tooth 304, and a power mechanism; the first rotating tooth 303 and the second rotating tooth 304 mesh with each other; the size of the first rotating tooth 303 and the second rotating tooth 304 after meshing is the diameter of the secondary circulation pipe, so that the powder feeding structure formed by the first rotating tooth 303 and the second rotating tooth 304 completely covers the secondary circulation pipe; the power mechanism is connected to the first rotating tooth 303 and the second rotating tooth 304 respectively.

[0041] Based on the above structure, by meshing the first rotating tooth 303 and the second rotating tooth 304, the size of the secondary circulation pipe is determined. This allows the entire secondary circulation pipe to be sealed off, ensuring that the entire granular material is fed only through the gear meshing point. The power of the power mechanism can achieve precise feeding of coarse granular powder.

[0042] As an example, the power mechanism is a motor with controllable rotation speed, which can control the rotation speed of the gear disk 301, thereby precisely controlling the amount of powder fed to the coarse powder through the gear disk 301.

[0043] As an example, the inlet of the centrifuge 302 is connected to the gear disk 301. The inlet of the centrifuge 302 is located on the central axis of the centrifuge 302. The outlet of the centrifuge 302 is collinear with the central axis of the collision chamber 105, so that the direction of the high-speed ejection of coarse particles in the centrifuge 302 is the tangential direction of the centrifuge 302.

[0044] The centrifuge 302 is a center feed centrifuge, meaning the feed inlet is located at the center of the centrifuge 302.

[0045] Based on the above structure, the centrifuge 302 can deliver coarse powder particles into the collision chamber 105 at high speed. The direction in which the coarse particles are ejected at high speed from the centrifuge 302 is the tangential direction of the centrifuge 302. The axial direction of the pipe ejected from the centrifuge 302 along the tangential direction is perpendicular to and intersects the axis of the collision chamber 105. This enables the coarse powder particles delivered by the centrifuge 302 to break through the airflow boundary layer on the inner wall of the collision chamber at maximum speed and enter the core collision zone of the collision chamber 105, thereby having a higher collision speed difference with the fine particles carried by the supersonic airflow of the main circulation pipe 1.

[0046] When feeding from the outside, due to the existence of a boundary layer with low airflow velocity and a mainstream core area with high flow velocity, powder particles tend to move with the airflow and are relatively concentrated in the boundary layer on the flow channel wall, resulting in low collision efficiency. Therefore, a centrifuge 302 is set in this solution. The direction of the high-speed ejection of coarse particles in the centrifuge 302 is the tangential direction of the centrifuge 302. The axial direction of the pipe ejected by the centrifuge 302 along the tangential direction is perpendicular to and intersects the axis of the collision chamber 105, which enables the coarse particles sent out by the centrifuge 302 to break through the boundary layer and enter the core collision area of ​​the collision chamber 105 at the maximum speed.

[0047] Example 2 This invention provides a technical solution: The dual-circulation collision method employing a centrifuge-gear disc powder feeding structure includes at least the following steps: Step 1: Weigh a certain amount of solid powder particles according to the mass ratio to prepare a solid powder particle mixture.

[0048] Step 2: Use air source 101 to create supersonic airflow in the main circulation pipeline 1 and the secondary circulation pipeline 3.

[0049] Step 3: Throw the prepared solid-phase powder-particle mixture into a supersonic airflow.

[0050] Step 4: The solid-phase powder particle mixture is accelerated by passing through the stabilization section 102, the supersonic nozzle section 103 and the acceleration section 104 of the main circulation pipeline 1 in sequence under the entrainment of the supersonic airflow.

[0051] Step 5: After the solid powder particle mixture collides with the target head 106 in the collision chamber 105, it enters the particle classification device 2 along the main circulation pipeline 1. The particle classification device 2 classifies the solid powder particle mixture. Fine particles that do not meet the requirements return to the upstream of the main circulation pipeline 1 through the fine particle outlet of the particle classification device 2 to continue to circulate, accelerate and collide. The products that meet the requirements enter the product recovery unit 107, and the coarse particles enter the secondary circulation pipeline 3.

[0052] Step Six: The coarse particles separated by the particle grading device 2 enter the collision chamber 105 after passing through the gear disk 301 and centrifuge 302 in the secondary circulation pipeline 3. The rotation speed of the gear disk 301 is adjusted by the motor connected to the central shaft, thereby precisely controlling the amount of coarse particles fed. The coarse particles fed into the centrifuge 302 through the gear disk 301 are ejected from the centrifuge 302 at high speed along the tangential direction under the action of the centrifugal force of the centrifuge 302, and then injected into the collision chamber 105 at high speed.

[0053] Step 7: The coarse particles accelerated by centrifuge 302 collide with the fine particles accelerated by the main circulation pipeline 1.

[0054] Step 8: Repeat this process until the desired product is obtained, then turn off the gas source 101.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-circulation collision system employing a centrifuge-gear disc powder feeding structure, characterized in that: It includes a main circulation pipeline (1), a particle classification device (2), and a secondary circulation pipeline (3); the main circulation pipeline (1) is provided with a particle acceleration structure; the particle classification device (2) is connected to the main circulation pipeline (1); one end of the secondary circulation pipeline (3) is connected to the coarse particle outlet of the particle classification device (2), and the other end extends into the collision chamber (105) of the main circulation pipeline (1); the secondary circulation pipeline (3) is provided with a centrifuge (302) for accelerating coarse particle powder and a gear disk (301) for controlling the amount of coarse particle powder fed.

2. The dual-circulation collision system with a centrifuge-gear disc powder feeding structure as described in claim 1, characterized in that: The main circulation pipeline (1) includes a stabilization section (102), a supersonic jet section (103), an acceleration section (104), a collision chamber (105), a circulation pipeline (108), and a gas source (101); the stabilization section (102), the supersonic jet section (103), the acceleration section (104), the collision chamber (105), and the circulation pipeline (108) are connected in sequence to form a loop; the gas source (101) is located on the front side wall of the stabilization section (102); the particle classification device (2) is connected to the circulation pipeline (108), and the particle classification device (2) includes multiple outlets, including at least a fine particle outlet, a coarse particle outlet, and a product outlet; the coarse particle outlet is connected to the secondary circulation pipeline (3), the fine particle outlet is connected to the circulation pipeline (108), and the product outlet is connected to the product recovery device (107).

3. The dual-circulation collision system employing a centrifuge-gear disc powder feeding structure as described in any one of claims 1 and 2, characterized in that: The gear disk (301) is located on the secondary circulation pipeline (3) near the end of the particle classification device (2), and the centrifuge (302) is located on the secondary circulation pipeline (3) near the end of the collision chamber (105).

4. The dual-circulation collision system employing a centrifuge-gear disc powder feeding structure as described in any one of claims 1 and 2, characterized in that: The gear disk (301) includes a first rotating tooth (303), a second rotating tooth (304), and a power mechanism; the first rotating tooth (303) and the second rotating tooth (304) mesh with each other; the size of the first rotating tooth (303) and the second rotating tooth (304) after meshing is the diameter of the secondary circulation pipe, so that the powder feeding structure formed by the first rotating tooth (303) and the second rotating tooth (304) completely covers the secondary circulation pipe; the power mechanism is connected to the first rotating tooth (303) and the second rotating tooth (304) respectively.

5. The dual-circulation collision system employing a centrifuge-gear disc powder feeding structure as described in any one of claims 1 and 2, characterized in that: The inlet of the centrifuge (302) is connected to the gear disk (301). The inlet of the centrifuge (302) is located on the central axis of the centrifuge (302). The central axis of the outlet of the centrifuge (302) is collinear with the central axis of the cross section of the collision chamber (105), so that the direction of the coarse particles ejected at high speed in the centrifuge (302) is the tangential direction of the centrifuge (302).

6. A dual-circulation collision method employing a centrifuge-gear disc powder feeding structure, characterized in that: Includes the following steps: Step 1: Weigh a certain amount of solid powder particles according to the mass ratio to prepare a solid powder particle mixture; Step 2: Use the air source (101) to create a supersonic airflow in the main circulation pipeline (1) and the secondary circulation pipeline (3); Step 3: Throw the prepared solid-phase powder-particle mixture into a supersonic airflow; Step 4: The solid-phase powder particle mixture is accelerated by passing through the stabilization section (102), the supersonic nozzle section (103), and the acceleration section (104) of the main circulation pipeline (1) in sequence under the entrainment of the supersonic airflow; Step 5: After the solid powder particle mixture collides with the target head (106) in the collision chamber (105), it enters the particle classification device (2) along the main circulation pipeline (1). The solid powder particle mixture is classified by the particle classification device (2). Fine particles that do not meet the requirements return to the upstream of the main circulation pipeline (1) through the fine particle outlet of the particle classification device (2) to continue to circulate, accelerate and collide. The products that meet the requirements enter the product recovery unit (107), and the coarse particles enter the secondary circulation pipeline (3). Step 6: The coarse particles separated by the particle grading device (2) enter the collision chamber (105) after passing through the gear disk (301) and centrifuge (302) of the secondary circulation pipeline (3); the speed of the gear disk (301) is adjusted by adjusting the speed control motor connected to the central shaft, thereby precisely controlling the amount of coarse particles fed; the coarse particles fed into the centrifuge (302) through the gear disk (301) are ejected from the centrifuge (302) at high speed along the tangential direction under the action of the centrifugal force of the centrifuge (302), and then ejected into the collision chamber (105) at high speed; Step 7: The coarse particles accelerated by the centrifuge (302) collide with the fine particles accelerated by the main circulation pipeline (1); Step 8: Repeat this process until the desired product is obtained, then turn off the gas source (101).

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