Ultra-high-speed continuous high-frequency collision pulverizing mechanism and pulverizing method thereof

Abstract

The application discloses a kind of ultra-high-speed sustained high-frequency collision smashing mechanism, including the high-speed rotating body that can rotate around axle, high-speed rotating body is equipped with the airflow crushing system and inlet and outlet material airflow system of cross operation, airflow crushing system is provided with multiple groups and is parallel for the collision smashing of material, inlet and outlet material airflow system shuttles between multiple airflow crushing systems for feeding and discharging, airflow crushing system is completely cut off with atmospheric pressure.The application utilizes the characteristic that airflow resistance is zero in vacuum channel, short-circuits the inlet and outlet of airflow crushing system, directly obtains high-flow air, along vacuum channel, high-flow airflow is ejected through collision nozzle, reciprocating closed self-circulation is made in vacuum channel, energy consumption is greatly reduced.Multiple crushing systems are connected in parallel along circumference, continuous high-frequency collision is realized.Adopting progressive design, the effect of high-frequency continuous crushing and sufficient self-milling is achieved.

Description

Technical Field

[0001] This invention relates to an ultra-high-speed continuous high-frequency collision pulverizing mechanism and its pulverizing method, belonging to the field of powder engineering technology. Background Technology

[0002] Developing mass-produced powders with a particle size of D98: 1um to 2um (calcite, ochre) or less is a global challenge and the most urgent direction for powder development now and in the future.

[0003] Current theoretical analyses of ultrafine pulverization mechanisms widely utilize Hertz theory calculations.

[0004]

[0005] As shown in the formula above, in addition to reflecting the relationship between the inherent material properties such as particle density, elastic modulus, and Poisson's ratio and the crushing velocity, this formula primarily reflects the relationship between particle size R and crushing velocity v. Typical experimental results based on the above formula are as follows: Figure 1 As shown in the experimental results, the particle crushing speed increases continuously with decreasing particle size. When the particle size is large, the crushing speed is greatly affected by changes in particle size; when the particle size is small, the crushing speed is less affected by changes in particle size. After the particle size decreases to a certain extent, the increase in impact crushing speed tends to level off. In the gas-solid two-phase flow under optimal concentration conditions, during continuous high-speed collisions, as the particle size decreases, the probability of complete head-on collisions between particles decreases, eventually leading to intense side collisions and high-speed friction between the vast majority of particles. Due to the very high density and impact force of these side collisions and frictions, strong self-grinding is formed, effectively crushing the particles under continuous high-frequency collisions.

[0006] Based on the mechanism analysis of ultrafine grinding, the high-frequency collision pulverizer developed aims to obtain ultrafine powder with a particle size of D98:1µm. However, this type of particle cannot be classified, and mass production is required. The development of high-frequency collision pulverization technology needs to overcome two major challenges: (1)

[0007] The basic theory of particle breakage energy W, as shown in the above formula, is that particles of different sizes in a gas-solid two-phase flow at a certain velocity generate different impact forces. The smaller the particle, the smaller the impact force, and the more difficult it is to crush. The impact force generated by a one-micron particle during collision must be greater than the particle's yield strength. Therefore, the airflow velocity must reach the speed of sound or even higher.

[0008] (2) According to Hertz's fragmentation theory, it is impossible to obtain 1µm particles by collision alone. The research and development process requires continuous, high-intensity, gradual, and high-frequency collisions.

[0009] First, the key is to obtain a high-speed working airflow capable of continuous, high-frequency collisions. Conventional methods for obtaining high-speed airflow involve atmospheric pressure. However, due to the inherent physical properties of air, and the extremely high temperatures generated by frictional eddies between air and air at atmospheric pressure, obtaining an ideal high-speed airflow is difficult. Air has a very low density at atmospheric pressure; it is an expandable, compressible, and highly viscous fluid, resulting in very high resistance when airflow passes through it. The ratio of resistance to velocity increases exponentially. At higher velocities, resistance is proportional to the square of the velocity; at even higher velocities, resistance is proportional to the cube of the velocity, and so on. For these reasons, traditional methods for obtaining high-speed airflow employ the high-pressure jet principle. Airflow velocity v≈ Where ρ is the air density, p represents dynamic pressure. At atmospheric pressure, the airflow velocity formula shows that the aim is to increase the airflow density, giving the air jet rigidity. Even so, its attenuation is extremely rapid, reaching the required design velocity only at the cone-shaped outlet. Furthermore, the airflow velocity of this high-pressure jet is unlikely to exceed the speed of sound. This is because when the pressure ratio exceeds the critical pressure ratio, congestion waves are generated; the higher the pressure, the more severe the congestion, making it difficult for the jet's airflow velocity to become supersonic. In summary, obtaining ultra-high-speed collision working airflow through the air at atmospheric pressure is very difficult. Its structure is complex, energy consumption is extremely high, and continuous high-frequency collisions cannot be achieved, making it difficult to meet the requirements for ultra-fine pulverization. Summary of the Invention

[0010] To address the aforementioned technical problems, this invention provides an ultra-high-speed continuous high-frequency collision pulverizing mechanism and its pulverizing method, which can obtain an ideal ultra-high-speed collision working airflow. Moreover, compared with traditional airflow pulverizers, energy consumption will be significantly reduced while achieving the requirements for ultra-fine pulverization.

[0011] To achieve the above-mentioned technical objectives and effects, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides an ultra-high-speed continuous high-frequency collision crushing mechanism, comprising an outer shell, a high-speed rotating body rotatable around an axis within the outer shell, a material inlet and a material outlet on the outer shell, and a cross-operating airflow crushing system and a feeding and discharging airflow system within the high-speed rotating body. The airflow crushing system is provided in multiple sets and connected in parallel for the collision crushing of materials, and the feeding and discharging airflow system shuttles between the multiple sets of airflow crushing systems for feeding and discharging materials. The airflow crushing system is completely isolated from atmospheric pressure and is in a vacuum state.

[0012] Preferably, the airflow pulverizing system includes an inner chamber and a power component. The inner chamber is located inside the high-speed rotating body and is completely isolated from atmospheric pressure. The power component is located in the inner chamber and is composed of an air extraction component and an air compression component connected in series. The inlet and outlet of the power component are short-circuited to form an independent closed circulation zone. Multiple closed-loop circulation zones corresponding to multiple airflow pulverizing systems are installed in parallel around the circumference of a high-speed rotating body. The air inlet of the multiple power components is a common area of ​​the parallel loop of multiple power components. Each power component has two airflow outlets in opposite directions on the outermost two sides in the circumferential direction. The two airflow outlets of each power component and the two airflow outlets with opposing jets from the four airflow outlets of the two adjacent power components form a pulverizing zone. The two airflow outlets with opposing jets are the collision ports of the pulverizing zone. The diameter of the collision ports of the power components decreases along the jet direction.

[0013] Furthermore, the airflow directions of the two airflow outlets at the collision port are 180° apart, and the flow rate and velocity of the airflow at each airflow outlet are equal.

[0014] Furthermore, both the extraction and compression components use centrifugal impellers as power sources. The centrifugal impeller of the extraction component uses forward-curved blades, while the centrifugal impeller of the compression component uses backward-curved blades.

[0015] Secondly, the present invention provides an ultra-high-speed continuous high-frequency collision pulverization method, which uses the above-mentioned ultra-high-speed continuous high-frequency collision pulverization mechanism to perform the pulverization operation, including the following steps: S1, drive the high-speed rotating body to rotate at high speed, and feed it through the feed and discharge airflow system. The working airflow of the airflow pulverizing system carries the coarser powder to form a gas-solid two-phase flow. S2, the inlet and outlet of the power component in the three airflow pulverizing systems are short-circuited, so that the system is in a closed loop state and a vacuum channel is formed in the inner chamber. The gas-solid two-phase flow passes through the vacuum channel and is ejected at high speed toward the collision port with a smaller diameter, becoming an ultra-high speed gas-solid two-phase flow, which collides with the gas-solid two-phase flow with the same properties and kinetic energy coming from the opposite direction. S3, three airflow pulverizing systems self-extract and self-pressurize in a reciprocating cycle, the gas-solid two-phase flow continuously collides and self-grinds at the collision port in a high-speed rotating body with high intensity, ultra-high speed and high frequency.

[0016] Preferably, in step S2, when the inlet and outlet of the power component are short-circuited, the outlet of the power component is under a slight positive pressure, the inlet is under a slight vacuum, the back pressure of the power component is a slight vacuum, the channel formed by the forward flow is the vacuum channel, and the air resistance of the vacuum channel is zero.

[0017] Furthermore, in step S3, the forward-curved blades of the pumping component of the power assembly perform high-flow-rate vacuuming of the gas-solid two-phase flow in the pulverizing zone. Then, the backward-curved blades of the compressor component of the power assembly force the high-flow-rate, high-speed gas-solid two-phase flow out to the collision port with a smaller diameter. Since the flow velocity equals the flow rate divided by the diameter, the accelerated gas-solid two-phase flow is ejected at ultra-high speed from the collision port to collide with the oncoming gas-solid two-phase flow of the same nature and kinetic energy. Because the back pressure of the power assembly is a micro-vacuum, the load on the moving blades is light. The gas-solid two-phase flow undergoes two stages of work through pumping and compression by the power assembly, and the airflow velocity produced by the blades is close to the blade's linear velocity, resulting in maximum flow rate. After the collision, the kinetic energy is released and the flow is drawn back into the inlet of the power assembly. The airflow pulverizing system operates in a self-pumping and self-compressing cycle, repeating continuously.

[0018] Preferably, in step S2, the velocity of the airflow at the collision port is directly proportional to the rotational speed and inversely proportional to the diameter of the nozzle cross-section.

[0019] The ultra-high-speed continuous high-frequency collision pulverization mechanism and pulverization method provided by this invention have the following advantages: 1. The ultra-high speed continuous high frequency collision pulverizing mechanism and pulverizing method of the present invention can not only obtain an ideal ultra-high speed collision working airflow to achieve the requirements of ultra-fine pulverization, but also significantly reduce energy consumption compared with traditional airflow pulverizers, because it has no high pressure loss; no kinetic energy loss caused by air resistance; no heat loss caused by ultra-high speed airflow friction, and has a simple, reliable and safe structure.

[0020] 2. The ultra-high speed continuous high frequency collision crushing mechanism of the present invention has three internal chamber grinding zones in one revolution of the high speed rotating body. In one revolution, there are three continuous collisions. The high-intensity, ultra-high speed, and high frequency continuous collision self-grinding fully realizes the crushing characteristics of micro particles through progressive crushing.

[0021] 3. Based on the characteristics of particle collision, the ultra-high-speed gas-solid two-phase flow of the present invention, through progressive high-frequency continuous collision, will reduce the dispersion of particles with the progressive length and the speed of material collection, thereby replacing the classifier, which is both convenient and energy-saving. Attached Figure Description

[0022] Figure 1 This is a linear relationship graph between particle size and crushing velocity based on the Hertz formula. Figure 2 A schematic diagram of airflow operation for obtaining working airflow through the air at normal atmospheric pressure; Figure 3 This is a schematic diagram of a self-circulating closed-loop short-circuit airflow high-frequency collision within an ultra-high-speed continuous high-frequency collision pulverizing mechanism according to the present invention. Figure 4 This is a schematic diagram of the progressive collision crushing principle of an ultra-high-speed continuous high-frequency collision crushing mechanism of the present invention. Figure 5 This is a schematic diagram of the closed-loop self-circulating airflow of the airflow pulverizing system of the present invention; Figure 6 This is a schematic diagram of the overall closed-loop self-circulating airflow during the operation of the ultra-high speed continuous high frequency collision crushing mechanism of the present invention.

[0023] In the picture: 1-Outer shell; 2-High-speed rotating body; 3-Inner chamber; 4-Power assembly; 41-Ejector; 42-Compressor; 43-Air outlet; 5-Collision port. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Reference Figures 3-4 This invention provides an ultra-high-speed continuous high-frequency collision pulverizing mechanism, including an outer shell 1, a high-speed rotating body 2 that can rotate around an axis inside the outer shell 1, a material inlet and a material outlet on the outer shell 1, and a cross-operating infeed and outfeed airflow system and multiple sets of airflow pulverizing systems inside the high-speed rotating body 2. The number of sets of airflow pulverizing systems is adapted according to the required pulverization fineness, dispersion and mass production. In this embodiment, three sets of airflow pulverizing systems are installed and connected in parallel for collision pulverization of materials. The infeed and outfeed airflow systems shuttle between the three sets of airflow pulverizing systems for feeding and discharging materials. The airflow pulverizing system is completely isolated from atmospheric pressure.

[0026] Reference Figure 3 and Figure 4 In a further embodiment, the airflow pulverizing system includes an inner chamber 3 and a power component 4. The inner chamber 3 is integrally formed inside the high-speed rotating body 2 and is completely isolated from atmospheric pressure. The power component 4 is installed in the inner chamber 3 and is composed of an air extraction component 41 and an air compression component 42 connected in series. The inlet and outlet of the power component 4 are short-circuited to form an independent closed circulation zone. The three closed-loop circulation zones of the three airflow pulverizing systems are installed in parallel around the circumference of the high-speed rotating body 2. The inlet of the air compressor 42 of the three power components 4 is the common area of ​​the parallel loop of the three power components 4. Each power component 4 has two airflow outlets 43 with opposite directions on the outermost two sides in the circumferential direction. The airflow direction of the two airflow outlets 43 is 180° opposite to each other, and the flow rate and velocity of the airflow at each airflow outlet 43 are equal. The six airflow outlets 43 of the three power components 4 are arranged opposite to each other to form three pulverizing zones. The two airflow outlets 43 with opposite jets are the collision ports 5 in the pulverizing zones.

[0027] Furthermore, both the extraction component 41 and the compression component 42 use centrifugal impellers as power sources. The centrifugal impeller of the extraction component 41 uses forward-curved blades, while the centrifugal impeller of the compression component 42 uses backward-curved blades.

[0028] Reference Figures 2-6 The present invention discloses an ultra-high-speed continuous high-frequency collision pulverization method, which utilizes the aforementioned ultra-high-speed continuous high-frequency collision pulverization mechanism for pulverization operations, and includes the following steps: S1, drives the high-speed rotating body 2 to rotate at high speed, and feeds it through the feed and discharge airflow system. The working airflow of the airflow pulverizing system carries the coarser powder to form a gas-solid two-phase flow. The airflow pulverizing system must be completely isolated from atmospheric pressure; otherwise, the system's operating conditions will change, causing a dramatic shift in airflow velocity. Airflow can only circulate within the system through suction, pushing, and compression. However, since the airflow pulverizing system pulverizes materials through collisions before discharge, the airflow pulverizing system and the inlet / outlet airflow system must operate in parallel. Although the pulverizing system is isolated from atmospheric pressure, the airflow density within the system remains unchanged. As long as the gas state at the intersection of the airflow pulverizing system and the inlet / outlet airflow system is consistent, the exchange and interweaving of airflow between the two systems will not be affected. The airflow pulverizing system is indirectly connected to atmospheric pressure through the inlet / outlet airflow system, simultaneously carrying away excess heat.

[0029] S2, the inlet and outlet of the power component 4 in the three airflow pulverizing systems are short-circuited, so that the system is in a closed loop state and a vacuum channel is formed in the inner chamber 3. The high-speed gas-solid two-phase flow with a large flow rate reaches the collision port 5 with a smaller diameter after passing through the vacuum channel and is accelerated to form an ultra-high-speed airflow that collides with the gas-solid two-phase flow with the same properties and kinetic energy coming from the opposite direction. When the inlet and outlet of power assembly 4 are short-circuited, the outlet of power assembly 4 experiences a slight positive pressure, while the inlet experiences a slight vacuum. The back pressure of power assembly 4 is a slight vacuum, resulting in zero air resistance in the vacuum channel. The load on the moving blades of power assembly 4 becomes very light, except for the resistance of the channel wall, leading to maximum airflow and minimum pressure loss. Due to the large channel diameter and short path, the pressure loss on the channel wall is extremely small. Specifically, in practical applications, the channel diameter is nearly 1 meter, and the path is less than 1 meter, so the pressure loss is negligible. Since there is no atmospheric pressure in the closed channel, but rather a vacuum, the pressure difference for increasing the flow velocity is very small. The moving blades of power assembly 4 have sufficient kinetic energy to increase the airflow velocity and the potential energy to overcome the centrifugal force when the pumping unit 41 extracts the gas-solid two-phase flow. At this time, the airflow velocity produced by the blades is close to the blade's linear velocity, resulting in maximum airflow and maximum velocity produced by power assembly 4.

[0030] Furthermore, the velocity of the airflow at the impact port 5 is directly proportional to the rotational speed and inversely proportional to the diameter of the nozzle cross-section.

[0031] S3, three airflow pulverizing systems self-extract and self-pressurize in a reciprocating cycle, the gas-solid two-phase flow continuously collides and self-grinds at the collision port in the high-speed rotating body 2 with high intensity, ultra-high speed and high frequency.

[0032] Furthermore, in step S3, the forward-curved blades of the pumping component 41 of the power assembly 4 perform high-flow-rate vacuuming of the gas-solid two-phase flow in the pulverizing zone. Then, the backward-curved blades of the compressing component 42 of the power assembly 4 force the high-flow-rate gas-solid two-phase flow out to the collision port 5. Since the flow velocity equals the flow rate divided by the diameter, the gas-solid two-phase flow is ejected at ultra-high speed from the collision port 5, which has a smaller diameter, to collide with the oncoming gas-solid two-phase flow of the same nature and kinetic energy. The gas-solid two-phase flow undergoes two stages of work through pumping and compression by the power assembly 4, resulting in maximum flow rate and maximum velocity. After the collision, the kinetic energy is released, and the flow is drawn back into the inlet of the power assembly 4. The airflow pulverizing system operates in a self-pumping and self-compressing cycle, repeating continuously. In this embodiment, the collision airflow velocity depends on the diameter of the collision port 5 and the kinetic energy provided by the power source, i.e., the output flow rate.

[0033] Compared with the prior art, the advantages of the ultra-high speed continuous high frequency collision crushing mechanism of the present invention are: The high-speed rotating body 2 has three inner chambers 3 grinding zones in one revolution. In one revolution, there are three consecutive collisions. Assuming the rotor speed is 3000r / min (50r / s), then there will be 150 consecutive collisions per second. This high-intensity, ultra-high-speed, and high-frequency continuous collision self-grinding fully realizes the crushing characteristics of micro particles through progressive pulverization.

[0034] The ultra-high-speed continuous high-frequency collision pulverization mechanism and pulverization method of the present invention have the following advantages: (1) This process can not only obtain an ideal ultra-high-speed collision working airflow with an airflow speed of over 1,000 km / s, but also significantly reduce energy consumption compared to traditional airflow pulverizers. This is because it has no high pressure loss; no kinetic energy loss due to air resistance; no heat loss due to ultra-high-speed airflow friction, and its structure is simple, reliable, and safe.

[0035] (2) This process solves the problem of continuous high-frequency collisions. Taking a rotation speed of 3000 r / min as an example, the gas-solid two-phase flow will collide at least 150 times / second. Taking a single parent particle as an example, it will collide at least 50 times / second. Each collision splits the particle into two, and so on, until it splits into four, and after 50 collisions, it will split into... Secondary grains. In other words, each parent grain, after 50 generations of reproduction, will produce... Sub-particles. That is, a single particle, after 50 consecutive collisions, will produce 1125 trillion particles. In reality, it may break into several particles with each collision, or it may be a series of collisions between particles. This collision takes place in a vacuum, and due to the absence of air resistance, it is a true hard collision. This ultra-dense, ultra-high-speed, and ultra-high-intensity high-frequency collision, with its exponentially multiplied crushing process, fully implements Hertz's microparticle crushing theory.

[0036] (3) Gas-solid two-phase flow exhibits two characteristics during continuous, high-frequency, progressive collisions. ① In the basic formula for breakup energy, there are two elements. The kinetic energy of a particle during collision has a square relationship with its corresponding area, and the corresponding mass has a cubic relationship. Therefore, under the same airflow velocity, the impact force experienced by microparticles of different sizes during collisions is different. The larger the microparticle, the greater the impact force, and the easier it is to break up, resulting in a smaller dispersion. ② During the collision process, the probability of collisions for microparticles of different sizes is different. The frequency of collisions for large particles increases linearly relative to that for small particles. This probability leads to a trend where large particles are gradually broken up into smaller particles, resulting in a smaller dispersion.

[0037] The combination of two inherent characteristics in the crushing process accelerates the pulverization process. In progressive pulverization, under exponentially increasing crushing rates, the dispersion of microparticles of varying sizes becomes narrower and narrower, and the fineness becomes finer and finer, until the limit of fineness that the airflow velocity can pulverize.

[0038] This pulverizing process can completely replace the classifier. By simply adjusting the pulverizer speed, the length of the progressive pulverization, and the collection speed, it is possible to directly achieve D98: 3um, 4um, etc., which is both convenient and energy-saving.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-speed continuous high-frequency collision crushing mechanism, comprising an outer shell, a high-speed rotating body rotatable about an axis within the outer shell, and a material inlet and a material outlet on the outer shell, characterized in that, The high-speed rotating body is equipped with a cross-operating airflow pulverizing system and a feeding and discharging airflow system. The airflow pulverizing system is provided in multiple sets and connected in parallel for the collision pulverization of materials. The feeding and discharging airflow system shuttles between the multiple sets of airflow pulverizing systems for feeding and discharging materials. The airflow pulverizing system is completely isolated from atmospheric pressure. The airflow pulverizing system includes an inner chamber and a power assembly. The inner chamber is located within the high-speed rotating body and is completely isolated from atmospheric pressure. The power assembly is located within the inner chamber and consists of an air extraction component and an air compression component connected in series. Both the air extraction component and the air compression component use centrifugal impellers as their power source. The centrifugal impeller of the air extraction component uses forward-curved blades, and the centrifugal impeller of the air compression component uses backward-curved blades. The inlet and outlet of the power assembly are short-circuited to form an independent closed-loop circulation zone. Multiple closed-loop circulation zones corresponding to multiple airflow pulverizing systems are installed in parallel around the circumference of a high-speed rotating body. The air inlet of the multiple power components is a common area of ​​the parallel loop of multiple power components. Each power component has two airflow outlets in opposite directions on the outermost two sides in the circumferential direction. The two airflow outlets of each power component and the two airflow outlets with opposite jets in the four airflow outlets of the two adjacent power components form a pulverizing zone. The two airflow outlets with opposite jets are the collision ports of the pulverizing zone. The diameter of the collision port of the power component decreases along the jet direction. The airflow directions of the two airflow outlets at the collision port are 180° apart, and the flow rate and velocity of the airflow at each airflow outlet are equal.

2. A method for ultra-high-speed continuous high-frequency collision pulverization, characterized in that, The crushing operation using the ultra-high-speed continuous high-frequency collision crushing mechanism as described in claim 1 includes the following steps: S1, drive the high-speed rotating body to rotate at high speed, and feed it through the feed and discharge airflow system. The working airflow of the airflow pulverizing system carries the coarser powder to form a gas-solid two-phase flow. S2, the inlet and outlet of the power component in the three airflow pulverizing systems are short-circuited, so that the system is in a closed loop state and a vacuum channel is formed in the inner chamber. The gas-solid two-phase flow passes through the vacuum channel and is ejected at high speed toward the collision port with a smaller diameter, becoming an ultra-high speed gas-solid two-phase flow, which collides with the gas-solid two-phase flow with the same properties and kinetic energy coming from the opposite direction. S3, three airflow pulverizing systems self-extract and self-pressurize in a reciprocating cycle, the gas-solid two-phase flow continuously collides and self-grinds at the collision port in a high-speed rotating body with high intensity, ultra-high speed and high frequency.

3. The ultra-high-speed continuous high-frequency collision pulverization method as described in claim 2, characterized in that, In step S2, when the inlet and outlet of the power component are short-circuited, the outlet of the power component is under a slight positive pressure, the inlet is under a slight vacuum, the back pressure of the power component is a slight vacuum, and the air resistance of the vacuum channel formed is zero.

4. The ultra-high-speed continuous high-frequency collision pulverization method as described in claim 3, characterized in that, In step S3, the forward-inclined blades of the pumping component of the power assembly perform high-flow-rate vacuuming of the gas-solid two-phase flow in the pulverizing zone. Then, the backward-inclined blades of the compressor component of the power assembly force the high-flow-rate, high-speed gas-solid two-phase flow out to the collision port with a smaller diameter. Since the flow velocity is equal to the flow rate divided by the diameter, the accelerated gas-solid two-phase flow is ejected at ultra-high speed from the collision port to collide with the gas-solid two-phase flow of the same nature and kinetic energy coming from the opposite direction. The gas-solid two-phase flow undergoes two stages of work by pumping and pressurizing by the power assembly. The airflow velocity produced by the blades is close to the linear velocity of the blades, and the flow rate is at its maximum. After the collision, the kinetic energy is released and is drawn back into the inlet of the power assembly. The airflow pulverizing system performs self-pumping and self-pressurizing in a reciprocating cycle.

5. The ultra-high-speed continuous high-frequency collision pulverization method as described in claim 2, characterized in that, In step S2, the velocity of the airflow at the collision port is directly proportional to the rotational speed and inversely proportional to the diameter of the nozzle cross-section.

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