A gas-solid coupling rotary intensifying mixing system and a mixing method

Abstract

The application provides a gas-solid coupling rotary intensification mixing system and a mixing method, which realizes a multi-stage series process through the arrangement of a premixing device, a first mixing device, a second mixing device, a third mixing device and a discharging device, and buffers through a transfer bin, thereby constructing a complete gradient mixing system, allowing the material to experience different shear and convection intensities in different stages, effectively eliminating mixing dead angles, improving mixing uniformity, shortening the time required to reach the target uniformity, and significantly improving the overall processing efficiency; a gas passage is arranged between the inner and outer mixing pipelines of the first mixing device to allow gas flow, and a porous channel is formed on the pipeline wall of the inner mixing pipeline, so that the gas can enter the inner mixing pipeline through the porous channel and form a gas-solid coupling effect with the material; meanwhile, gas inlets are arranged on the vortex enhancement pipeline and each mixing device to introduce gas flow for auxiliary conveying, so as to form a vortex and improve the local turbulence intensity and the mixing uniformity of the material.

Description

Technical Field

[0001] This application relates to the field of fluid mixing equipment technology, and in particular to a gas-solid coupling rotary enhanced mixing system and mixing method. Background Technology

[0002] In the chemical, metallurgical, building materials, food, and energy industries, the mixing and conveying of powder or granular materials is a common process. Current technologies typically employ mechanical stirring or pneumatic conveying to achieve material mixing, but these methods have limitations. Firstly, single stirring or airflow is insufficient to create sufficient and continuous disturbance, easily leading to material stratification or uneven mixing in certain areas. Secondly, existing equipment often relies on high-power mechanical stirring devices, resulting in high system energy consumption. Furthermore, when handling high-viscosity, easily agglomerated, or poorly flowing powder or granular materials, blockages, agglomeration, and accumulation can easily occur during conveying, affecting the continuity and stability of system operation. In addition, existing mixing equipment is mostly single-stage mixing, lacking cyclic reinforcement or multi-stage continuous mixing structures, making it difficult to further improve mixing uniformity and processing efficiency. Summary of the Invention

[0003] To address the aforementioned technical problems, this application provides a gas-solid coupling rotational enhanced mixing system and mixing method.

[0004] In a first aspect, this application provides a gas-solid coupling rotary enhanced mixing system, including a premixing device, a transfer silo, a feeding device, a first mixing device, a second mixing device, a third mixing device, and a discharging device. The premixing device includes a premixing pipe and a pre-stirring structure disposed within the premixing pipe; one end of the premixing pipe forms an inlet and the other end forms an outlet; material enters the premixing pipe from the inlet and exits from the outlet into a transfer silo; the feeding device is disposed on one side of the transfer silo and is connected to the first mixing device; the first mixing device includes an inner mixing pipe, an outer mixing pipe, and a first rotary stirring structure; the inner mixing pipe is sleeved inside the outer mixing pipe, and a gas passage for gas flow is formed between them at intervals; the first rotary stirring structure is disposed inside the inner mixing pipe; gas is introduced into the gas passage at the inlet end of the first mixing device, and the outlet end is connected to one end of the vortex enhancement pipe; an air inlet is formed on the vortex enhancement pipe, and its other end is connected to the second mixing device; the second mixing device includes multiple mixing units arranged side by side, each mixing unit being connected to the vortex enhancement pipe and the inlet end of the third mixing device; the discharge end of the third mixing device is connected to the discharge device.

[0005] In some embodiments of this application, porous channels are formed on the pipe wall of the internal mixing pipe, allowing gas to enter the internal mixing pipe through the porous channels and form a gas-solid coupling effect with the material.

[0006] In some embodiments of this application, there are multiple first rotary stirring structures, and the multiple first rotary stirring structures are arranged at intervals along the axial direction of the internal mixing pipe; the first rotary stirring structure includes a mounting body and a first stirring blade disposed on the inner wall of the mounting body.

[0007] In some embodiments of this application, the eddy current enhanced pipe includes a first arc segment, a straight segment, a second arc segment, and a multi-junction segment connected in sequence.

[0008] In some embodiments of this application, the mixing unit includes a first mixing unit, a second mixing unit, and a third mixing unit; the first mixing unit includes a first mixing pipe and a second rotary stirring structure disposed within the first mixing pipe; the second mixing unit includes a second mixing pipe and a turbulence structure disposed within the second mixing pipe; the third mixing unit includes a third mixing pipe and a flow guiding structure disposed within the third mixing pipe.

[0009] In some embodiments of this application, the feed ends of the first mixing pipe, the second mixing pipe, and the third mixing pipe are all provided with air inlets.

[0010] In some embodiments of this application, the transfer silo includes a silo and a third rotary stirring structure disposed within the silo; the third rotary stirring structure includes a rotary drive unit and a third rotary stirring unit that is driveably connected to the rotary drive unit.

[0011] In some embodiments of this application, a swirling structure is further provided between the feeding device and the first mixing device; the swirling structure includes a swirling structure body and a fourth rotating stirring structure disposed inside the swirling structure body; an air inlet channel tangential to the swirling structure body is formed on the swirling structure body.

[0012] In some embodiments of this application, the discharge device includes an inner discharge cylinder and an outer discharge cylinder; one end of the inner discharge cylinder is rotatably mounted on the third mixing device, and a first discharge port is formed on the other end; the outer discharge cylinder is sleeved outside the inner discharge cylinder, and an air inlet is formed on its upper part and a second discharge port is formed on its lower part.

[0013] A second aspect of this application provides a mixing method for a gas-solid coupling rotary enhanced mixing system as described above, the mixing method comprising the following steps: Step S1: The material enters the premixing pipe through the feed inlet on the premixing pipe and is premixed by the pre-stirring structure; In step S2, the premixed material is conveyed to the transfer silo; Step S3: The feeding device feeds the material in the transfer hopper into the inner mixing pipe of the first mixing device, and at the same time, airflow is introduced into the inner mixing pipe and the air passage to drive the material to flow along the inner mixing pipe and perform gas-solid coupling to achieve preliminary mixing. Step S4: The material enters the vortex-enhanced pipe and is selectively mixed in one of the mixing units according to the material's parameter characteristics. Step S5: The material after being mixed again enters the third mixing device for a fourth mixing. In step S6, the material enters the inner discharge cylinder of the discharge device. The inner discharge cylinder rotates continuously, causing the material to be discharged through the first discharge port into the outer discharge cylinder. The airflow enters the outer discharge cylinder through the air inlet on the outer discharge cylinder, causing the material to be mixed for the fifth time. The mixed material is discharged through the second discharge port.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1) Multi-stage synergistic mixing significantly improves the uniformity of mixing. In this application, a multi-stage series process is realized by setting up a "pre-mixing device - first mixing device - second mixing device - third mixing device - discharge device". With the buffer of the transfer silo, a complete gradient mixing system is constructed, which enables the material to undergo shearing and convection of different intensities at different stages, effectively eliminating mixing dead zones, improving mixing uniformity, shortening the time required to reach the target uniformity, and significantly improving the overall processing efficiency. 2) Gas-solid coupling mechanism effectively solves the problems of agglomeration and blockage. In this application, an air passage is set between the inner and outer mixing pipes of the first mixing device to allow gas flow. A porous channel is formed on the pipe wall of the inner mixing pipe, through which gas can enter the inner mixing pipe and form a gas-solid coupling effect with the material. At the same time, air inlets are set on the vortex enhancement pipe and each mixing device to introduce airflow to assist in the conveying, which can form vortices, improve the local turbulence intensity, and improve the mixing uniformity of the material. 3) Structured flow field enhancement design reduces energy consumption and enhances conveying stability. In this application, by setting an air passage between the inner and outer mixing pipes, gas can enter the inner mixing pipe through a porous channel. By setting a vortex enhancement pipe, the flow field distribution inside the system can be optimized. The vortex enhancement pipe can generate vortices, which increases the turbulence intensity of the material, allowing the material to be suspended and conveyed at lower wind speeds or mechanical speeds. This reduces the dependence on high-power fans or motors, achieving energy saving and consumption reduction. At the same time, the formed vortices can increase the local turbulence intensity and improve the mixing uniformity of the material. 4) The pneumatic and mechanical coupling mixing mechanism improves the material dispersion ability. In this application, the dual-power mixing is achieved by combining gas-driven mixing and mechanical structure stirring, thereby improving the material dispersion ability. 5) The process is highly flexible and meets the diverse and complex material processing needs. In this application, the second mixing device includes multiple mixing units. Different mixing units can be selected for mixing according to the characteristics of the material such as particle size, moisture content, flowability, agglomeration degree, and fragility. It can adapt to the mixing of materials with different parameters.

[0015] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit this document. Attached Figure Description

[0016] The accompanying drawings, which form part of this document, are used to provide a further understanding of the document. The illustrative embodiments and descriptions herein are used to explain the document and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a gas-solid coupling rotary enhanced hybrid system provided in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of the structure of a premixing device provided in an exemplary embodiment of this application; Figure 3 This is a schematic diagram of the third rotary stirring structure provided in an exemplary embodiment of this application; Figure 4 This is a front view of a first mixing device provided in an exemplary embodiment of this application; Figure 5 This is the book Figure 4 Sectional view at point BB; Figure 6 This is a schematic diagram of the swirl structure provided in an exemplary embodiment of this application; Figure 7 This is a top view of a vortex structure provided in an exemplary embodiment of this application; Figure 8 This is a top view of an exemplary embodiment of the eddy current enhanced pipe provided in this application; Figure 9 This is a front view of the first hybrid unit provided in an exemplary embodiment of this application; Figure 10 This is a schematic diagram of the second rotary stirring structure provided in an exemplary embodiment of this application; Figure 11 This is a front view of the second hybrid unit provided in an exemplary embodiment of this application; Figure 12 This is a front view of the third hybrid unit provided in an exemplary embodiment of this application; Figure 13 This is a front view of a third mixing device provided in an exemplary embodiment of this application; Figure 14 This is a schematic diagram of the structure of a discharge device provided in an exemplary embodiment of this application; Figure 15 This is a cross-sectional view of a discharge device provided in an exemplary embodiment of this application; Figure 16 This is a schematic diagram of the operating process of a system provided in an exemplary embodiment of this application.

[0017] In the picture: 10. Premixing device; 101. Premixing pipe; 102. Pre-stirring structure; 103. Feed inlet; 104. Discharge outlet; 20. Transfer hopper; 201. Hopper; 202. Third rotary stirring structure; 2021. Rotary drive unit; 2022. Third rotary stirring unit; 30. Feeding device; 40. First mixing device; 401. Inner mixing pipe; 402. Outer mixing pipe; 403. First rotary stirring structure; 4031. Slip ring; 4032. Mounting body; 4033. First stirring blade; 404. Air passage; 50. Second mixing device; 501. First mixing unit; 5011. First mixing pipe; 5012. Second rotary stirring structure; 502. Two mixing units; 5021, second mixing pipe; 5022, turbulence structure; 503, third mixing unit; 5031, third mixing pipe; 5032, flow guiding structure; 60, third mixing device; 601, fourth mixing pipe; 602, fixed stirring structure; 70, discharge device; 701, inner discharge cylinder; 7011, first discharge port; 702, outer discharge cylinder; 7021, second discharge port; 80, vortex enhancement pipe; 801, first arc section; 802, straight section; 803, second arc section; 804, multi-channel confluence section; 90, air supply system; 100, vortex structure; 1001, vortex structure body; 1002, fourth rotating stirring structure; 10A, air inlet. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0019] In the chemical, metallurgical, building materials, food, and energy industries, the mixing and conveying of powder or granular materials is a common process. Current technologies typically employ mechanical stirring or pneumatic conveying to achieve material mixing, but these methods have limitations. Firstly, single stirring or airflow is insufficient to create sufficient and continuous disturbance, easily leading to material stratification or uneven mixing in certain areas. Secondly, existing equipment often relies on high-power mechanical stirring devices, resulting in high system energy consumption. Furthermore, when handling high-viscosity, easily agglomerated, or poorly flowing powder or granular materials, blockages, agglomeration, and accumulation can easily occur during conveying, affecting the continuity and stability of system operation. In addition, existing mixing equipment is mostly single-stage mixing, lacking cyclic reinforcement or multi-stage continuous mixing structures, making it difficult to further improve mixing uniformity and processing efficiency.

[0020] Based on this, an exemplary embodiment of this application provides a gas-solid coupling rotary enhanced mixing system and mixing method. By setting up a "premixing device - first mixing device - second mixing device - third mixing device - discharge device", a multi-stage series process is realized. With the buffer of the transfer silo, a complete gradient mixing system is constructed, which enables the material to undergo shearing and convection of different intensities at different stages, effectively eliminating mixing dead zones, improving mixing uniformity, shortening the time required to reach the target uniformity, and significantly improving the overall processing efficiency. An air passage is set between the inner and outer mixing pipes of the first mixing device to allow gas flow. A porous channel is formed on the pipe wall of the inner mixing pipe, through which gas can enter the inner mixing pipe and form a gas-solid coupling effect with the material. At the same time, air inlets are set on the vortex enhancement pipe and each mixing device to introduce airflow to assist in conveying, which can form vortices, improve the local turbulence intensity, and improve the mixing uniformity of the material.

[0021] Example 1: An exemplary embodiment of this application provides a gas-solid coupling rotary enhanced hybrid system, such as... Figures 1 to 15 As shown, the mixing system includes a premixing device 10, a transfer hopper 20, a feeding device 30, a first mixing device 40, a second mixing device 50, a third mixing device 60, a discharge device 70, a vortex-enhancing pipe 80, and an air supply system 90. The air supply system 90 includes an air compressor and an air storage tank. The air compressor generates compressed gas, and the air storage tank stores, stabilizes, and buffers the compressed gas, thereby continuously providing a stable airflow to each air inlet of the system and adjusting the gas pressure and flow rate as needed. The air supply system 90 is connected via pipelines to the air inlets 10A of the vortex structure 100, the first mixing device 40, the second mixing device 50, the third mixing device 60, the discharge device 70, and the vortex-enhancing pipe 80, providing power and gas disturbance conditions for subsequent functional areas.

[0022] like Figure 2 As shown, the premixing device 10 includes a premixing pipe 101 and a pre-stirring structure 102 disposed within the premixing pipe 101. One end of the pre-stirring structure 102 is connected to a drive unit to drive the pre-stirring structure 102 to rotate. The pre-stirring structure 102 is an auger, which conveys the material to the transfer silo 20 while achieving initial dispersion and mixing of the material, so that materials that may otherwise agglomerate or stratify are premixed, thereby reducing the load on the subsequent enhanced mixing stage. Preferably, two pre-stirring structures 102 are provided in the premixing pipe to improve the capacity for conveying and mixing materials. One end of the premixing pipe 101 forms an inlet 103, and the other end forms an outlet 104; the material enters the premixing pipe 101 from the inlet 103 and is discharged from the outlet 104 into the transfer silo 20.

[0023] like Figure 1 and 3 As shown, the transfer silo 20 includes a silo 201 and a third rotary stirring structure 202 disposed within the silo 201. The third rotary stirring structure 202 includes a rotary drive unit 2021 and a third rotary stirring unit 2022 connected to the rotary drive unit 2021. The rotary drive unit 2021 is preferably a motor. The third rotary stirring unit 2022 includes a stirring shaft and a stirring mounting bracket surrounding the stirring shaft, on which stirring blades are disposed. Preferably, the stirring blades are curved, wave-like plates that can generate axial and radial forces during stirring. The stirring blades can overturn and throw the material deposited at the bottom upwards, eliminating the dead zone of material accumulation at the bottom and further improving the uniformity of material mixing. The outlet of the transfer silo 20 is connected to the feeding device 30. The material is sucked in and conveyed to the vortex structure 100 under the negative pressure generated by the feeding device 30. The transfer silo 20 is used for temporary storage and buffering of materials, making the feeding process more continuous and stable, and reducing the impact of upstream supply fluctuations on system operation.

[0024] The feeding device 30 is located on one side of the transfer hopper 20 and is connected to the first mixing device 40; preferably, the feeding device 30 is a vacuum feeder; a swirl structure 100 is also provided between the first mixing device 40 and the feeding device 30. Figure 6 and 7 As shown, the swirling structure 100 includes a swirling structure body 1001 and a fourth rotary stirring structure 1002 disposed inside the swirling structure body 1001. The fourth rotary stirring structure 1002 includes a rotating shaft and stirring blades disposed on the rotating shaft. An air inlet channel tangential to the swirling structure body 1001 is formed on the swirling structure body 1001, such that an air inlet channel is formed inside the swirling structure 100 as shown in the figure. Figure 7The tangential air intake, indicated by the middle arrow, forms a rotating airflow that disperses the material. Simultaneously, the fourth rotating stirring structure 1002 inside the swirl structure 100 rotates under the action of the gas, which can break up the material, enhance the disturbance and mixing effect of the material, thereby effectively reducing agglomeration and blockage, and improving the stability and uniformity of the subsequent mixing process.

[0025] like Figure 4 and 5 As shown, the first mixing device 40 includes an inner mixing pipe 401, an outer mixing pipe 402, and a first rotary stirring structure 403. The inner mixing pipe 401 is fitted inside the outer mixing pipe 402, and an annular air passage is formed between them to allow gas to flow. An air inlet is formed at the end of the first mixing device 40 near the feed, and air is supplied to both the inner mixing pipe 401 and the air passage, so that the material is in continuous contact with the gas during the conveying process, improving the mixing uniformity. The gas entering the inner mixing pipe 401 forms a gas-solid coupling effect with the material, producing a loosening, lifting, and agitation effect on the material, reducing the risk of material deposition and blockage at the pipe wall, and enhancing the relative movement between material particles, thereby improving the mixing uniformity.

[0026] Preferably, the inner mixing pipe 401 has porous channels formed on its pipe wall, allowing gas to enter the inner mixing pipe 401 through these channels, forming a distributed airflow disturbance field, eliminating airflow disturbance blind spots, and creating a gas-solid coupling effect between the airflow and the material. Preferably, the outer mixing pipe 402 can be made of pressure-bearing materials such as stainless steel, carbon steel, or aluminum alloy, used to form gas distribution channels and support the inner mixing pipe 401; the inner mixing pipe 401 can be made of sintered metal porous pipe, microporous ceramic pipe, or other materials, with small pore sizes in the porous channels, smaller than the particle size of the material to be transported, allowing gas to pass through while preventing material particles from penetrating. For example, such as... Figure 5 As shown, when compressed gas enters the air passage, a certain pressure is formed within the air passage, and it enters the material conveying channel of the inner mixing pipe 401 through the porous channel of the inner mixing pipe 401. Figure 5The black arrows in the diagram indicate the direction in which gas enters the inner mixing pipe 401. Since the direction of the porous channel can be disordered, the direction of the gas entering the inner mixing pipe 401 can also be disordered, resulting in a multi-directional turbulent flow within the inner mixing pipe 401. This creates a complex three-dimensional turbulent field that can impact and lift material particles from various angles, achieving 360° airflow coverage without dead angles. This eliminates airflow blind spots and prevents localized material deposition. Simultaneously, it can synergize with the flow field of the built-in first rotating stirring structure 403 to generate abundant local vortices. This not only lifts the material to prevent sedimentation and stratification but also enhances the relative collisions between particles, efficiently breaking up soft agglomerates and improving mixing uniformity.

[0027] In existing technologies, pipe wall deposition and blockage are persistent problems when processing high-viscosity, easily agglomerated, or high-moisture materials. In this application, the airflow through the inner mixing pipe 401 forms a dynamic gas film on its inner wall, preventing direct contact between high-moisture, high-viscosity materials and the pipe wall. This prevents materials from settling under gravity, allowing them to remain in a suspended or semi-suspended state, significantly reducing the risk of material adhesion, scaling, and blockage. It also significantly reduces the difficulty and cost of maintenance and cleaning, ensuring the long-term continuity and stability of the system and minimizing downtime for cleaning. The disordered airflow increases the relative velocity between particles, causing components of different particle sizes and densities to repeatedly exchange positions within the pipe. For easily agglomerated materials, the localized high-pressure microjets generated by gas permeation can penetrate deep into the agglomerates, disrupting the connections between particles and enhancing dispersion. This results in a combination of macroscopic convection and microscopic diffusion within the inner mixing pipe 401, significantly improving the uniformity of material mixing.

[0028] In addition, the internal mixing pipe 401 can be flexibly replaced with sintered metal or microporous ceramic pipes with appropriate apertures according to the particle size and properties of the processed materials. It has strong adaptability and can be replaced individually after damage, without the need for the entire device to be scrapped, thus reducing the operation and maintenance costs throughout the entire life cycle. The semi-fluidized state formed by the gas entering the internal mixing pipe 401 can significantly reduce the operating resistance of the rotary agitator, and can reduce the drive power compared with a pure mechanical agitator with the same processing capacity.

[0029] The first rotary stirring structure 403 is disposed inside the inner mixing pipe 401; the feed end of the first mixing device 40 introduces gas into the air passage, and the discharge end is connected to one end of the vortex enhancement pipe 80; an air inlet 10A is formed on the vortex enhancement pipe 80, and its other end is connected to the second mixing device 50; the second mixing device 50 includes multiple mixing units arranged side by side, each mixing unit being connected to the vortex enhancement pipe 80 and the feed end of the third mixing device 60; the discharge end of the third mixing device 60 is connected to the discharge device 70.

[0030] Preferably, there are multiple first rotary stirring structures 403, which are arranged at intervals along the axial direction of the inner mixing pipe 401. The arrangement density of the first rotary stirring structures 403 can be flexibly adjusted according to the total length of the inner mixing pipe 401 and the properties of the material. For example, for high-moisture and high-viscosity materials, the arrangement density of the first rotary stirring structures 403 can be increased to improve the mixing uniformity of the material. The first rotary stirring structure 403 includes a mounting body 4032 and first stirring blades 4033 disposed on the inner wall of the mounting body 4032. Multiple first stirring blades 4033 are evenly distributed circumferentially along the inner wall of the mounting body 4032. The mounting body 4032 is mounted on a slip ring 4031, which is connected to an external drive unit to drive the mounting body 4032 and the first stirring blades 4033 to rotate and stir the material. At the same time, the stirring speed and rotation direction of each first rotary stirring structure 403 can be independently controlled to achieve zoned adjustment and differentiated mixing, further improving the flexibility and uniformity of the material mixing process. For example, when processing highly viscous, easily agglomerated materials, high-speed rotation can be fully activated to enhance the dispersing effect; when processing fragile coated particles, crystalline particles, or other materials requiring high integrity, the rotation speed can be reduced or some units can be shut down to avoid strong shearing and material breakage, balancing mixing efficiency and material protection needs. As the material flows through different sections, its trajectory is repeatedly disrupted and reorganized, effectively eliminating the concentration gradient along the pipeline axis. This allows for immediate dispersion and homogenization of the material as it passes through the pipeline, eliminating the need for additional residence time and significantly improving overall processing efficiency and the uniformity of the final product's mixing.

[0031] Preferably, a shut-off fan is also provided at the end of the first mixing device 40, and the end of the shut-off fan is connected to the vortex enhancement pipe 80. The shut-off fan is used to receive the gas-solid mixture output from the first mixing device 40, and divides the material into several independent compartments through its internal rotating impeller, and continuously conveys it to the vortex enhancement pipe 80. While realizing material conveying, the shut-off fan can isolate the airflow between the first mixing device 40 and the vortex enhancement pipe 80, reducing direct cross-contamination of upstream and downstream airflows. The shut-off fan can reduce the impact of airflow fluctuations in the vortex enhancement pipe 80 and subsequent mixing units on the gas-solid coupling mixing state in the first mixing device 40, and helps to maintain a stable pressure distribution in the annular air passage and the inner mixing pipe 401 within the first mixing device 40, thereby ensuring the continuity and stability of the upstream gas-solid coupling mixing process.

[0032] like Figure 8As shown, the vortex-enhanced pipe 80 includes a first arc-shaped section 801, a straight section 802, a second arc-shaped section 803, and a multi-port confluence section 804 connected sequentially. The first arc-shaped section 801 is also equipped with an air inlet pipe, forming an air inlet 10A, to allow gas to be introduced into the vortex-enhanced pipe 80. The pipe connecting the multi-port confluence section 804 and the mixing unit is preferably an arc-shaped pipe, with a switching valve between them for selective switching. When the gas-solid two-phase flow carrying material enters the arc-shaped section, it undergoes circular motion constrained by the curvature of the bend, generating outward centrifugal force: both gas and solid particles shift towards the outer side of the arc-shaped pipe, resulting in a higher static pressure on the outer side than on the inner side, forming a radial pressure difference along the pipe cross-section. This pressure difference drives the fluid near the wall to flow from the high-pressure outer side to the low-pressure inner side, while the fluid in the central region of the pipe replenishes from the inner side to the outer side. This, combined with the main flow along the pipe axis, forms a vortex field.

[0033] In this application, by setting the first arc segment 801 and the second arc segment 803, the direction of centrifugal force is changed twice, forming more local turbulence and increasing the intensity of turbulence. At the same time, solid particles of different sizes and densities are subjected to greater differences in centrifugal force, resulting in differentiated motion trajectories. The particles collide and mix with each other, further enhancing the eddy current disturbance effect.

[0034] For example, the mixing unit in this application includes a first mixing unit 501, a second mixing unit 502, and a third mixing unit 503 arranged side by side. The system can control the selection valve to switch between different conveying paths based on the particle size, moisture content, flowability, agglomeration degree, fragility, and target mixing intensity of the material, allowing the material to enter the corresponding mixing unit for differentiated mixing processing to meet the mixing requirements under different working conditions. The inlet ends of the first mixing pipe 5011, the second mixing pipe 5021, and the third mixing pipe 5031 are all provided with air inlets 10A, so that gas can be introduced into the first mixing pipe 5011, the second mixing pipe 5021, and the third mixing pipe 5031, forming a multi-source airflow coupling effect. This creates a distributed disturbance mixing field during the material conveying process, improving the mixing uniformity of the material.

[0035] like Figure 9 and 10As shown, the first mixing unit 501 includes a first mixing pipe 5011 and a second rotary stirring structure 5012 disposed within the first mixing pipe 5011. The second rotary stirring structure 5012 includes a rotating shaft, an arc-shaped mounting plate, and wave-shaped stirring blades. The rotating shaft is hinged to the inner wall of the first mixing pipe 5011, and an arc-shaped mounting plate is provided at one end of each rotating shaft. Multiple wave-shaped stirring blades are spaced apart between two arc-shaped mounting plates. Under the action of airflow, the second rotary stirring structure 5012 can rotate and can adaptively rotate according to the intensity of the airflow, reducing energy consumption. During rotation, the wave-shaped stirring blades generate periodic pressure pulsations and shear forces, which not only increase the contact area between the material and the blades but also force the material to undergo intense exchange in the radial, axial, and tangential dimensions, improving the mixing uniformity of the material.

[0036] The first mixing unit 501 is an independent rotary intensified mixing unit. When the material passes through this pipe, the gas enters along the axial direction and locally tangential direction of the first mixing pipe 5011, forming a gas-solid two-phase flow field with a certain velocity gradient inside the pipe. The second rotary stirring structure 5012 rotates continuously under the impetus of the airflow, subjecting the material to the combined effects of airflow shearing, centrifugal disturbance, and mechanical tumbling, thereby achieving active lifting, tumbling, dispersion, and remixing. For materials that are prone to agglomeration, have high moisture content, or are highly adhesive, when relying solely on ordinary airflow for transport, particles are easily agglomerated due to adhesion, capillary force, or electrostatic effects, leading to uneven mixing or local blockage. However, within the first mixing pipe 5011, the second rotary stirring structure 5012 can significantly increase the local turbulence intensity, giving the airflow a stronger scouring and dispersing effect on the material; simultaneously, the centrifugal disturbance and tumbling motion generated by the second rotary stirring structure 5012 can disrupt the stable structure inside the agglomerates, causing components of different particle sizes or densities to repeatedly exchange positions within the pipe cross-section, thereby improving mixing uniformity.

[0037] Preferably, there are multiple second rotary stirring structures 5012, distributed at intervals along the axial direction of the first mixing pipe 5011, and the rotation angles of the multiple second rotary stirring structures 5012 are different, constructing a complex three-dimensional turbulent flow field. After the gas enters the pipe, as it passes through each section, its originally relatively simple axial flow is broken up by the action of the second rotary stirring structures 5012, forming local rotational and undulating flow. The multiple second rotary stirring structures 5012 rotate along different rotation axes. When the material passes through each second rotary stirring structure 5012, on the one hand, it can continuously change the motion field of the material, and on the other hand, it can periodically lift and disperse the material, allowing the material located at the bottom of the pipe or in the local accumulation area to re-enter the mainstream airflow area. As a result, the relative motion between material particles is enhanced, agglomerated materials are more easily dispersed, and the low-speed accumulation area in the pipe is reduced, thereby improving the mixing uniformity of the material.

[0038] like Figure 11 As shown, the second mixing unit 502 includes a second mixing pipe 5021 and a flow-dispersing structure 5022 disposed within the second mixing pipe 5021. Multiple sets of flow-dispersing structures 5022 are arranged at intervals along the axial direction of the second mixing pipe 5021. Each set of flow-dispersing structures 5022 includes multiple flow-dispersing components distributed at intervals along the circumference. Preferably, the flow-dispersing components are arc-shaped, which can form multiple arc-shaped bends to divert the passing material and increase the collision surface contact and collision probability between the material and the flow-dispersing components.

[0039] One end of the turbulence-inducing component is fixed to the inner wall of the second mixing pipe 5021. When the material flows and the airflow passes through, it will collide with the turbulence-inducing component, split, turn back and re-merge, so that the material will form multiple turbulence-mixing in the pipe and improve the mixing uniformity of the material.

[0040] For example, the second mixing unit 502 is a fixed-flow conventional mixing unit. Compared with the first mixing unit 501, the turbulence structure 5022 of the second mixing unit 502 has a simpler structure and more stable operation, making it suitable for powder or granular materials that require further homogenization. For example, this path can be selected for dry mineral powder, ordinary powder, mixtures with relatively uniform particle size but requiring secondary homogenization, and materials that still need to improve homogenization after the previous mixing stage.

[0041] like Figure 12 As shown, the third mixing unit 503 includes a third mixing pipe 5031 and a flow guiding structure 5032 disposed within the third mixing pipe 5031. Multiple sets of flow guiding structures 5032 are arranged at intervals along the axial direction of the third mixing pipe 5031. Each set of flow guiding structures 5032 includes multiple flow guiding components distributed at intervals along the circumference. One end of each flow guiding component is fixed to the inner wall of the third mixing pipe 5031.

[0042] The third mixing unit 503 is a fixed-flow, low-disturbance mixing unit, primarily used for smooth material conveying and low-disturbance mixing. This maintains a certain degree of agitation during conveying, preventing accumulation at the bottom of the pipe and minimizing impact, shearing, and breakage effects on the material. This mixing unit is suitable for materials with good flowability, low agglomeration, no need for vigorous mixing, or high requirements for particle integrity. For example, this path is preferred for dry granular materials, easily breakable crystalline particles, coated particles, low-strength particles, and materials that have already been sufficiently premixed and only require stable conveying and slight homogenization.

[0043] like Figure 13As shown, the third mixing device 60 includes a fourth mixing pipe 601 and a fixed stirring structure 602 disposed within the fourth mixing pipe 601. One end of the fourth mixing pipe 601 also forms an air inlet 10A to allow gas to be introduced into the fourth mixing pipe 601. Multiple sets of fixed stirring structures 602 are arranged at intervals along the axial direction of the fourth mixing pipe 601. Each set of fixed stirring structures 602 includes multiple fixed stirring components arranged at intervals along the circumferential direction of the inner wall of the fourth mixing pipe 601. Preferably, the fixed stirring components of each set of fixed stirring structures 602 are arranged in a spiral direction, so that the forced-inlet gas and solid phase flows can generate spiral turbulence, improving the uniformity of material mixing.

[0044] like Figure 14 and 15 As shown, the discharge device 70 includes an inner discharge cylinder 701 and an outer discharge cylinder 702. One end of the inner discharge cylinder 701 is rotatably mounted on the third mixing device 60, and a first discharge port 7011 is formed on the other end. Preferably, there are multiple first discharge ports 7011, spaced apart circumferentially along the inner discharge cylinder 701. For example, one end of the inner discharge cylinder 701 can be rotatably mounted on the third mixing device 60 via a slip ring. The slip ring is externally connected to a drive unit to drive the inner discharge cylinder 701 to rotate. Thus, after the material enters the inner discharge cylinder 701, it is thrown into the outer discharge cylinder 702 through the first discharge port 7011 under the action of rotation, achieving further dispersion of the material. The outer discharge cylinder 702 is sleeved outside the inner discharge cylinder 701, forming a semi-enclosed discharge space between them. An air inlet 10A is formed at the upper part of the outer discharge cylinder 702, and a second discharge port 7021 is formed at the lower part. During the discharge process, air is introduced into the outer discharge cylinder 702 through the air inlet 10A. The airflow creates secondary disturbance and dispersion on the scattered material, further homogenizing it before discharge, enhancing its flowability, reducing accumulation, bridging, and blockage at the discharge end, and improving discharge continuity and system stability. Preferably, a filter screen is also provided at the top of the air inlet 10A of the discharge device 70 to prevent impurities from entering. Both the first discharge port 7011 and the second discharge port 7021 can be configured with a controllable opening structure or a screening structure, allowing adjustment of the material discharge flow rate or particle size according to process requirements, improving the system's adaptability and control accuracy.

[0045] Example 2: An exemplary embodiment of this application provides a mixing method for a gas-solid coupling rotary enhanced hybrid system as described in Embodiment 1, the mixing method comprising the following steps: In step S1, the material enters the premixing pipe 101 through the feed port 103 on the premixing pipe 101 and is premixed by the pre-stirring structure 102; In step S2, the premixed material is conveyed to the transfer silo 20 by the conveying action of the pre-stirring structure 102; the material in the silo 201 is mixed under the action of the third rotary stirring structure 202, which can further improve the mixing uniformity of the material while buffering and regulating the material. In step S3, the feeding device 30 feeds the material from the transfer hopper 20 into the inner mixing pipe of the first mixing device 40. During the feeding process, airflow is introduced into the vortex structure 100, causing the vortex structure 100 to form a rotating airflow, which disperses the material. The fourth rotating stirring structure 1002 inside the vortex structure 100 rotates under the action of the gas, which can break up the material and enhance the disturbance and mixing effect of the material. At the same time, airflow is introduced into the inner mixing pipe 401 and the air passage, driving the material along the inner mixing pipe 401. 1. The flow and gas-solid coupling effect achieve preliminary mixing; the gas in the air channel can enter the inner mixing pipe 401 through the porous structure, which can impact and lift the material particles from all angles, achieving 360° airflow coverage without dead angles, eliminating airflow blind spots and avoiding local material deposition; at the same time, it can form a synergy with the flow field of the built-in first rotating stirring structure 403 to generate rich local vortices, which can not only lift the material to avoid sedimentation and stratification, but also enhance the relative collision between particles, efficiently disperse soft agglomerates, and improve the mixing uniformity; In step S4, the material enters the vortex-enhanced pipe 80 and is selectively mixed in one of the mixing units according to the material's parameter characteristics. Under the action of centrifugal force and airflow, the material entering the vortex-enhanced pipe 80 forms more local turbulence, which increases the turbulence intensity. Then, according to the material's particle size, moisture content, flowability, agglomeration degree, fragility, and target mixing intensity, the switching valve is controlled to switch different conveying paths, so that the material enters the corresponding mixing unit for differentiated mixing treatment. Step S5: The material after being mixed again enters the third mixing device 60 for a fourth mixing. In step S6, the material enters the inner discharge cylinder 701 of the discharge device 70. The inner discharge cylinder 701 rotates continuously, causing the material to be discharged through the first discharge port 7011 into the outer discharge cylinder 702. The airflow enters the outer discharge cylinder 702 through the air inlet 10A on the outer discharge cylinder 702, so that the material is mixed for the fifth time. The mixed material is discharged through the second discharge port 7021.

[0046] In this application, airflow is introduced into the first mixing device 40, the second mixing device 50, the third mixing device 60, the eddy current enhancement pipe 80, and the discharge device 70 to achieve multi-source air intake synergistic mixing, form gas-solid coupling effect, form a distributed airflow field, achieve multi-region synergistic mixing, and improve the mixing uniformity of materials.

[0047] like Figure 16As shown, after the system starts, it first enters the safety detection phase to check the surrounding environment and the system's operating status. At the same time, the system enters standby mode and initializes the parameters of each part, including air source pressure, stirring speed, air intake, running time, and valve opening, to provide basic control conditions for subsequent operation.

[0048] After initialization, the system detects whether any material has entered. When material is detected, the pre-mixing structure 102 is activated to perform preliminary mixing and conveying of the material. The pre-mixing structure 102 operates continuously for a preset time t1, ensuring that different materials are initially dispersed and homogenized before entering the transfer silo 20. The pre-mixed material then enters the transfer silo 20, and the system monitors the material level within the silo 20 in real time using a level sensor.

[0049] When the material level in the transfer hopper 20 does not reach the set value (for example, the material level is lower than 1 / 4 of the hopper height), the third rotary stirring structure 202 remains in standby mode to reduce no-load operation; when the material level reaches or exceeds the set threshold, the third rotary stirring structure 202 is activated to further agitate and homogenize the material in the hopper, thereby preventing the material from stratifying, depositing or accumulating locally in the transfer hopper.

[0050] Simultaneously, the system activates the gas supply system 90 and monitors the gas pressure in real time. When the gas pressure does not reach the set value, the system continuously adjusts or maintains the gas output; when the gas pressure meets the set condition (P>P_set), the gas supply system 90 begins to deliver gas to various functional areas, including the swirl structure 100, the eddy current enhancement pipe 80, the first mixing device 40, the second mixing device 50, and the discharge device 70. After entering the system, the gas provides the power source for subsequent material conveying, rotational disturbance, and gas-solid coupling mixing.

[0051] As the material in the transfer hopper 20 continues to increase, when the material level reaches the set upper limit (e.g., 3 / 4 of the hopper height), the system activates the feeding device 30. The material is drawn in and conveyed to the vortex structure 100 under negative pressure. The vortex structure 100 forms a rotating airflow through tangential air intake to pre-disperse the material and reduce the risk of agglomeration and blockage during subsequent mixing.

[0052] Subsequently, the material enters the first mixing unit 40. During this process, the system controls the residence time of the material in the mixing zone according to a preset time (t2), and simultaneously determines the path based on the material characteristics. The system can analyze the material state based on parameters such as material flowability, agglomeration degree, fragility, and mixing uniformity requirements, and control the material to enter different mixing units by selecting on / off valves.

[0053] When the material is a common powder or a granular material with good flowability, the system selects the conventional mixing unit; when the material is prone to agglomeration, has a high moisture content, or requires high-intensity mixing, the system switches to the enhanced mixing unit to improve the mixing uniformity through stronger disturbance structure and airflow; when the material is easily broken or only requires light mixing, it enters the weakened mixing unit to reduce particle breakage and excessive shearing.

[0054] In each mixing unit, gas continuously participates in the mixing process and together with the mechanical stirring structure, forms a gas-solid coupled disturbance field. The material is further homogenized under the action of rotational disturbance, lifting and scattering, airflow shearing and local eddy currents. The mixed material finally enters the discharge device.

[0055] During the operation of the discharge device 70, the inner discharge cylinder 701 rotates continuously, causing the material to be thrown into the outer discharge cylinder 702 through the first discharge port 7011. Airflow is controlled through the air inlet 10A in the outer discharge cylinder 702, which further agitates and disperses the thrown material, while simultaneously carrying away fine dust particles along the discharge direction, thereby reducing the risk of disorderly dust diffusion. Finally, the material is discharged under continuous agitation and stable conveying conditions, achieving coordinated operation of the entire system from premixing, conveying, enhanced mixing to stable discharge.

[0056] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0057] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0058] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations fall within the scope of the claims of this application and their equivalents, the intent of this application also includes these modifications and variations.

Claims

1. A gas-solid coupled rotary enhanced hybrid system, characterized in that, It includes a premixing device (10), a transfer hopper (20), a feeding device (30), a first mixing device (40), a second mixing device (50), a third mixing device (60), and a discharge device (70); The premixing device (10) includes a premixing pipe (101) and a pre-stirring structure (102) disposed within the premixing pipe (101); one end of the premixing pipe (101) forms an inlet (103), and the other end forms an outlet (104); the material enters the premixing pipe (101) from the inlet (103) and is discharged from the outlet (104) into the transfer silo (20); the feeding device (30) is disposed on one side of the transfer silo (20) and communicates with the first mixing device (40); the first mixing device (40) includes an inner mixing pipe (401), an outer mixing pipe (402), and a first rotary stirring structure (403); the inner mixing pipe (401) is fitted with... An air passage for gas flow is formed between the outer mixing pipe (402) and the inner mixing pipe (401); the first rotary stirring structure (403) is located inside the inner mixing pipe (401); the feed end of the first mixing device (40) introduces gas into the air passage, and the discharge end is connected to one end of the vortex enhancement pipe (80); an air inlet (10A) is formed on the vortex enhancement pipe (80), and its other end is connected to the second mixing device (50); the second mixing device (50) includes multiple mixing units arranged side by side, each mixing unit is connected to the feed end of the vortex enhancement pipe (80) and the third mixing device (60); the discharge end of the third mixing device (60) is connected to the discharge device (70).

2. The gas-solid coupling rotary enhanced hybrid system according to claim 1, characterized in that, The inner mixing pipe (401) has a porous channel formed on its pipe wall, through which gas can enter the inner mixing pipe (401) and form a gas-solid coupling effect with the material.

3. The gas-solid coupling rotary enhanced hybrid system according to claim 1, characterized in that, There are multiple first rotary stirring structures (403), and the multiple first rotary stirring structures (403) are arranged at intervals along the axial direction of the inner mixing pipe (401); the first rotary stirring structure (403) includes a mounting body (4032) and a first stirring blade (4033) disposed on the inner wall of the mounting body (4032).

4. The gas-solid coupling rotary enhanced hybrid system according to claim 1, characterized in that, The eddy current enhanced pipe (80) includes a first arc section (801), a straight section (802), a second arc section (803), and a multi-pass junction section (804) connected in sequence.

5. The gas-solid coupling rotary enhanced hybrid system according to claim 1, characterized in that, The mixing unit includes a first mixing unit (501), a second mixing unit (502), and a third mixing unit (503); the first mixing unit (501) includes a first mixing pipe (5011) and a second rotary stirring structure (5012) disposed within the first mixing pipe (5011); the second mixing unit (502) includes a second mixing pipe (5021) and a turbulence structure (5022) disposed within the second mixing pipe (5021); the third mixing unit (503) includes a third mixing pipe (5031) and a flow guiding structure (5032) disposed within the third mixing pipe (5031).

6. The gas-solid coupling rotary enhanced hybrid system according to claim 5, characterized in that, The feed ends of the first mixing pipe (5011), the second mixing pipe (5021) and the third mixing pipe (5031) are all provided with air inlets (10A).

7. The gas-solid coupling rotary enhanced hybrid system according to claim 1, characterized in that, The transfer silo (20) includes a silo (201) and a third rotary stirring structure (202) disposed in the silo (201); the third rotary stirring structure (202) includes a rotary drive unit (2021) and a third rotary stirring unit (2022) that is drively connected to the rotary drive unit (2021).

8. The gas-solid coupling rotational enhanced hybrid system according to claim 1, characterized in that, A swirling structure (100) is also provided between the feeding device (30) and the first mixing device (40); the swirling structure (100) includes a swirling structure body (1001) and a fourth rotating stirring structure (1002) disposed inside the swirling structure body (1001); an air inlet channel tangential to the swirling structure body (1001) is formed on the swirling structure body (1001).

9. The gas-solid coupling rotary enhanced hybrid system according to claim 1, characterized in that, The discharge device (70) includes an inner discharge cylinder (701) and an outer discharge cylinder (702); one end of the inner discharge cylinder (701) is rotatably mounted on the third mixing device (60), and a first discharge port (7011) is formed on the other end; the outer discharge cylinder (702) is sleeved outside the inner discharge cylinder (701), and an air inlet (10A) is formed on its upper part, and a second discharge port (7021) is formed on its lower part.

10. A mixing method for a gas-solid coupling rotationally enhanced hybrid system as described in any one of claims 1 to 9, characterized in that, The mixing method includes the following steps: In step S1, the material enters the premixing pipe (101) through the feed port (103) on the premixing pipe (101) and is premixed by the pre-stirring structure (102); In step S2, the premixed material is conveyed to the transfer silo (20). In step S3, the feeding device (30) feeds the material in the transfer silo (20) into the inner mixing pipe of the first mixing device (40), and at the same time, airflow is introduced into the inner mixing pipe (401) and the air passage to drive the material to flow along the inner mixing pipe (401) and perform gas-solid coupling to achieve preliminary mixing. Step S4: The material enters the eddy current enhanced pipe (80) and is selectively mixed in one of the mixing units according to the parameter characteristics of the material for a third time. Step S5: The material after being mixed again enters the third mixing device (60) for a fourth mixing. In step S6, the material enters the inner discharge cylinder (701) of the discharge device (70). The inner discharge cylinder (701) rotates continuously, causing the material to be discharged through the first discharge port (7011) into the outer discharge cylinder (702). The airflow enters the outer discharge cylinder (702) through the air inlet (10A) on the outer discharge cylinder (702), so that the material is mixed for the fifth time. The mixed material is discharged through the second discharge port (7021).

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