A device and preparation method for mixing and discharging materials.

Abstract

This invention discloses a mixing and discharging device and its preparation method. The device includes a material cylinder, a discharge port, a feeding assembly, and a mixing assembly. The discharge port is located at the bottom of the material cylinder. The feeding assemblies are symmetrically arranged on both sides of the central axis of the material cylinder. The diameter of the discharge port is smaller than the diameter of the material cylinder. An inclined surface is formed between the material cylinder and the discharge port. The mixing assembly is disposed on the inclined surface. This invention utilizes multiple nozzles and chambers installed at different positions on the material cylinder. Combined with the nozzle angle, turbulence can be generated during material impact, greatly enhancing the mixing and dispersion effect of the material.

Description

Technical Field

[0001] This invention belongs to the field of materials processing, particularly the field of materials mixing and dispersion, and more specifically, relates to a mixing and discharging device and a preparation method. Background Technology

[0002] In industrial production, the mixing and dispersion of materials is crucial. Traditional mixing and dispersion methods mainly employ mechanical means, such as high-speed stirring and ball milling. However, these methods suffer from poor uniformity, low efficiency, high energy consumption, easy equipment damage, and inability to guarantee particle fineness. Other methods utilize airflow mixing and dispersion, such as fluidized beds and air jet mills. These methods have high requirements for the size, shape, and quality of raw materials, and when the material is an ultrafine powder, they also suffer from problems such as agglomeration, incomplete dispersion, and difficulty in material bridging and discharge. These traditional methods primarily focus on mixing and dispersing at the particle level, and their effectiveness is unsatisfactory.

[0003] Therefore, overcoming the technical defects of the existing technology is an urgent problem to be solved in this technical field. Summary of the Invention

[0004] In view of the above-mentioned defects or improvement needs of the prior art, the present invention provides a mixing and discharging device and its preparation method, the purpose of which is to improve the mixing and dispersion effect of materials, so as to solve the technical problem of poor material mixing effect at present.

[0005] To achieve the above objectives, according to one aspect of the present invention, a mixing and discharging apparatus is provided, the apparatus comprising a material cylinder, a discharge port, a feeding assembly, and a mixing assembly, wherein: The discharge port is provided at the bottom of the material cylinder, and the feeding components are symmetrically arranged on both sides of the central axis of the material cylinder. The diameter of the discharge port is smaller than the diameter of the material cylinder, and an inclined surface is formed between the material cylinder and the discharge port. The mixing component is arranged on the inclined surface.

[0006] As a further improvement and supplement to the above solution, the present invention also includes the following additional technical features.

[0007] Preferably, the feeding assembly includes a first compressed air interface, a feeding hopper, a first air cannon chamber, a first valve, and a first nozzle, wherein: The input end of the first air cannon chamber is connected to the first compressed air interface and the feeding hopper, the first valve is provided between the output end of the first air cannon chamber and the first nozzle, and the feeding hopper is located on the top of the first air cannon chamber.

[0008] Preferably, the volume of the first air cannon chamber is 0.5-50L, the pressure range of the first air cannon chamber is 0.1-1.5MPa, and the temperature range of the first air cannon chamber is 20-300℃.

[0009] Preferably, the mixing assembly includes a second compressed air interface, a second air chamber, a second valve, and a second nozzle, wherein: The input end of the second air cannon chamber is connected to the second compressed air interface, and the second valve is provided between the output end of the second air cannon chamber and the second nozzle.

[0010] Preferably, the angle between the second nozzle and the central axis of the barrel is in the range of 30-60°.

[0011] Preferably, when there are two or more second nozzles, the height of the second nozzles from the ground may be the same or different.

[0012] Preferably, the first nozzle and the second nozzle are straight.

[0013] Preferably, the first nozzle is curved, and the outlet of the first nozzle is oriented toward the center point of all the first nozzles.

[0014] According to another aspect of the present invention, a method for preparing a mixing and discharging device is provided, using the mixing and discharging device as described in the first aspect, the method comprising: The material enters the feed cylinder through the feeding assembly; The material first enters the first air cannon chamber from the feeding hopper. An external air source provides compressed gas to the first air cannon chamber through the first compressed gas interface. The pressure and temperature in the first air cannon chamber are adjusted to the first target value. The first valve is opened, and the material is ejected from the first nozzle along with the high-pressure gas, causing impact and mixing. An external air source supplies compressed gas to the second air chamber through the second compressed gas interface, adjusts the pressure and temperature inside the second air chamber to the second target value, opens the second valve, and the second nozzle impacts the material falling to the mixing component with airflow at a preset frequency. After secondary mixing and dispersion, the material falls from the discharge port.

[0015] Preferably, the material is fed into the barrel through the feeding assembly by means of vacuum suction or screw feeding, with a feeding speed of 1-100 kg / h.

[0016] In summary, the technical solutions conceived by this invention have the following beneficial effects compared with the prior art: This invention provides a mixing and discharging device and preparation method. By installing multiple chambers and nozzles at different positions on the material cylinder and combining the nozzle angles, turbulence can be generated during the material impact process, which greatly enhances the mixing and dispersion effect of the material. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of a mixing and discharging device provided in Embodiment 1; Figure 2 This is a schematic diagram of a curved first nozzle used in a mixing and discharging device provided in this embodiment 1; Figure 3 This is a schematic diagram showing the second nozzle 14 at the same height from the ground as provided in Embodiment 1; Figure 4 This is a schematic diagram showing the inconsistent height of the second nozzle 14 from the ground provided in Embodiment 1; Figure 5 This is a schematic diagram of the impinging flow of the material provided in Embodiment 1 in the mixing and discharging device; Figure 6 This is a SEM image of a carbon nanotube material with a particle size of 20 μm provided in this embodiment 2; Figure 7 The carbon nanotube material with a particle size of 11 μm is obtained by passing through an air cannon and impact in the mixing and discharging device provided in Example 1, as provided in Example 2. Figure 8 This is a SEM image of a carbon nanotube material with a particle size of 20 μm provided in this embodiment 2; Figure 9 This is a SEM image of carbon nanotube material with a particle size of 11 μm after passing through an air cannon and impact in the mixing and discharging device provided in Example 1, as provided in Example 2. Figure 10 This is a schematic diagram of a mixed discharge preparation method provided in Embodiment 2.

[0019] Wherein: 1-mixing and discharging device; 2-material cylinder; 3-exhaust port; 4-discharge port; 5-; 6-first air cannon chamber; 7-first valve; 8-first nozzle; 9-first compressed air interface; 10-feeding hopper; 11-second compressed air interface; 12-second air cannon chamber; 13-second valve; 14-second nozzle. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0021] Example 1 This embodiment provides a device for mixing and discharging materials, such as... Figure 1 As shown, the device includes a material cylinder 2, a discharge port 4, a feeding assembly, and a mixing assembly, wherein: The discharge port 4 is provided at the bottom of the material cylinder 2, and the feeding components are symmetrically arranged on both sides of the central axis of the material cylinder. The diameter of the discharge port 4 is smaller than the diameter of the material cylinder 2. An inclined surface is formed between the material cylinder 2 and the discharge port 4, and the mixing component is arranged on the inclined surface.

[0022] By installing multiple air cannons and nozzles at different positions on the material barrel, and combining the nozzle angles, turbulence can be generated during the material impact process, greatly enhancing the mixing and dispersion effect of the material.

[0023] To provide a high-pressure impact environment for the material inside the barrel, in conjunction with the embodiments of the present invention, there is also a preferred implementation scheme, specifically, as follows: Figure 1 As shown, the feeding assembly includes a first compressed air interface 9, a feeding hopper 10, a first air cannon chamber 6, a first valve 7, and a first nozzle 8, wherein: The input end of the first air cannon chamber 6 is connected to the first compressed air interface 9 and the feeding hopper 10. The first valve 7 is provided between the output end of the first air cannon chamber 6 and the first nozzle 8. The feeding hopper 10 is provided on the top of the first air cannon chamber 6.

[0024] In this first embodiment, as Figure 1 As shown, the feeding assembly has four air cannons, arranged horizontally in pairs, with the first nozzle 8 spraying horizontally. The volume of the first air cannon chamber 6 is 10L, the pressure range of the first air cannon chamber 6 is 0.1-1.5MPa, and the heating temperature range of the first air cannon chamber 6 is 20-300℃.

[0025] To provide a high-pressure impact environment for the material inside the barrel, in conjunction with the embodiments of the present invention, there is also a preferred implementation scheme, specifically, as follows: Figure 1 As shown, the mixing assembly includes a second compressed air interface 11, a second air cannon chamber 12, a second valve 13, and a second nozzle 14, wherein: The input end of the second air cannon chamber 12 is connected to the second compressed air interface 11, and the second valve 13 is provided between the output end of the second air cannon chamber 12 and the second nozzle 14.

[0026] Due to differences in particle size and density, heavier materials fall first, while a small amount of lighter materials remain suspended. Activating air cannons at a certain frequency in the discharge port area uses high-speed airflow to impact the accumulated materials, achieving secondary mixing and dispersion, further homogenizing the product, and resolving bridging issues, making the material loose and easy to unload. In conjunction with the embodiments of this invention, there is also a preferred implementation scheme, specifically, as follows: Figure 1 As shown, the angle between the second nozzle 14 and the central axis of the barrel 2 is 30-60°.

[0027] When the second nozzle 14 is oriented at an angle of 30° and 60° toward the central axis of the material cylinder 2, the second nozzle 14 sprays high-pressure gas, which is beneficial for the heavy material to move upward again and prolongs the falling time. This allows the material to be mixed and dispersed a second time, and the light and heavy materials become loose after being mixed and dispersed.

[0028] In order to achieve the effect of secondary mixing and dispersion of materials, and to make the effect of secondary mixing and dispersion of materials significant, in conjunction with the embodiments of the present invention, there is also a preferred implementation scheme, specifically, the number of second nozzles 14 is at least one.

[0029] When there are two or more second nozzles 14, the height of the second nozzles 14 above the ground is the same. For example... Figure 3 As shown, when the second nozzle 14 is at the same height from the ground, the angle of the second nozzle 14 toward the central axis of the material cylinder 2 can be determined according to the specific formula of the mixed material. For example, there are two second nozzles 14, and they are at the same height from the ground. One of the second nozzles 14, number A, has an angle of 30° toward the central axis of the material cylinder 2, and the other second nozzle 14, number B, has an angle of 60° toward the central axis of the material cylinder 2. The high-pressure gas ejected by nozzles A and B is beneficial for the heavy material to move upward again during the falling process, prolonging the falling time, while the light and heavy materials undergo secondary mixing and dispersion.

[0030] When there are two or more second nozzles, the height of the second nozzles 14 above the ground can also be inconsistent. For example... Figure 4As shown, when the height of the second nozzle 14 from the ground is inconsistent, the angle of the second nozzle 14 toward the central axis of the material cylinder 2 can be determined according to the specific formula of the mixed material. For example, there are two second nozzles 14, and their heights from the ground are inconsistent. One second nozzle 14, numbered C, has an angle of 30° toward the central axis of the material cylinder 2, and the other second nozzle 14, numbered D, has an angle of 60° toward the central axis of the material cylinder 2. The high-pressure gas ejected by nozzles C and D is beneficial for the heavy material to move upward again during the falling process, prolonging the falling time and causing secondary mixing and dispersion with the light material.

[0031] In conjunction with the embodiments of the present invention, there is also a preferred implementation scheme, specifically, as follows: Figure 1 As shown, the first nozzle and the second nozzle are straight.

[0032] The nozzle can be a Laval nozzle, enabling supersonic material ejection. Nozzles can have different styles and installation angles, allowing for adjustment of the material ejection angle. Specifically, it can eject material horizontally, vertically, at an angle, or in a divergent manner.

[0033] In conjunction with the embodiments of the present invention, there is also a preferred implementation scheme, specifically, as follows: Figure 2 As shown, the first nozzle is curved, and the outlet of the first nozzle faces the center point of all the first nozzles.

[0034] In this first embodiment, as Figure 2 As shown, the feeding assembly has four curved first nozzles 8 arranged horizontally in pairs, the volume of the first air cannon chamber 6 is 15L, the pressure range of the first air cannon chamber 6 is 0.1-1.5MPa, the heating temperature range of the first air cannon chamber 6 is 50-100℃, and the four first nozzles 8 are designed to be inclined so that the sprayed material can be concentrated in the center of the tank.

[0035] There are at least two first nozzles 8, arranged horizontally opposite each other. Each first nozzle 8 contains a curved pipe, along which material travels towards the nozzle. The pipe outlet is located at the nozzle. There can be at least one pipe, but also two or more. The pipe is curved, specifically spiral, zigzag, etc. When there are multiple pipes, the outlets of the multiple pipes converge at the nozzle's center.

[0036] The first nozzle 8 has a curved pipe inside, where the material collides with the pipe, resulting in primary mixing and dispersion. The opposing first nozzles 8 cause the ejected material to collide and form an impact flow, resulting in secondary mixing and dispersion, significantly improving the uniformity of mixing and dispersion and ensuring material fineness. This enables continuous production of mixed and dispersed materials with high efficiency.

[0037] Example 2: This second embodiment provides a mixing and discharging method, using the mixing and discharging apparatus as provided in Embodiment 1, the method including as follows: Figure 10 The steps shown are as follows: S101: The material enters the feed cylinder through the feeding assembly.

[0038] S102: The material first enters the first air cannon chamber from the feeding hopper. An external air source provides compressed gas to the first air cannon chamber through the first compressed gas interface. The pressure and temperature in the first air cannon chamber are adjusted to the first target value. The first valve is opened, and the material is ejected from the first nozzle along with the high-pressure gas, causing impact and mixing.

[0039] S103: An external air source provides compressed gas to the second air chamber through the second compressed gas interface, adjusts the pressure and temperature inside the second air chamber to the second target value, opens the second valve, and the second nozzle impacts the material falling to the mixing component with airflow at a preset frequency. After secondary mixing and dispersion, the material falls from the discharge port.

[0040] Material enters the first air cannon chamber 6 through the feeding hopper 10. The feeding method can be vacuum suction or screw feeding. The feeding speed is 1-100 kg / h. The feeding hopper 10 is closed, and an external air source supplies compressed gas to the first compressed air interface 9. The first air cannon chamber 6 is sealed and pressurized. The pressure and temperature of the first air cannon chamber 6 are adjusted. When the target value is reached, the first valve 7 is opened, and the material is instantly released from the first nozzle 8 along with the high-pressure gas, expanding rapidly. The two opposing nozzles 8 cause the expanding material to collide at high speed, and due to inertia, the material continues to move and penetrate into the opposing material fluid, forming turbulence. Repeated collisions significantly enhance the heat and mass transfer process, thereby achieving molecular-level mixing and dispersion. Finally, due to particle collisions and reduced velocity, the gas is discharged from the exhaust port 3, and the material falls into the discharge port area at the bottom of the tank. Due to differences in particle size and density, heavier materials fall first, while a small amount of lighter materials remain suspended. By activating the second air chamber 12 and second nozzle 14 in the discharge port area at a certain frequency, high-speed airflow impacts the accumulated material, enabling secondary mixing and dispersion, further homogenizing the product, and resolving bridging issues, making the material loose and easy to unload. Repeating the above steps allows for efficient continuous production.

[0041] The impact flow generation area can be located on the central axis of the tank or at any position within the tank. This can be achieved by adjusting the installation position and depth of the first nozzle 8 and the second nozzle 14, as well as adjusting the gas pressure, nozzle length, and spray angle of the first nozzle 8 and the second nozzle 14. During operation, the first nozzle 8 and the second nozzle 14 can be activated simultaneously or selectively. The pressure and temperature of the first nozzle 8 and the second nozzle 14 can be set to be the same or different. During the mixing and dispersion process, multiple impact flows can undergo secondary impacts, resulting in more uniform mixing and dispersion.

[0042] The weight, type, and form of the materials filled in each of the first air gun compartment 6 and the second air gun compartment 12 may be the same or different.

[0043] The material can be in the form of powder or particles, with a particle size at the micro- or nano-scale. It can be a single substance or a mixture of multiple components. It can also be in the form of a liquid.

[0044] In this second embodiment, as Figure 6 and Figure 8 As shown, carbon nanotubes with a particle size of 20 μm are introduced into the first air chamber of Example 1. The compressed gas is nitrogen, the pressure is adjusted to 0.1 MPa, and the temperature of the first air chamber is 50°C. The first valve is opened, and the carbon nanotubes are instantly introduced into the material tank through the first nozzle along with the high-pressure airflow, forming an impact flow. The mixing component is then activated for secondary mixing and dispersion. Figure 7 and Figure 9 As shown, the particle size of the discharged carbon nanotubes is 11 μm.

[0045] This device and method are applicable to a wide range of materials and can be used in various fields such as chemical, pharmaceutical, food, and energy. The device and method of this invention significantly enhance heat and mass transfer through air cannons and impact flow technology, achieving thorough mixing and dispersion of materials, as well as pulverization and particle size refinement. The heat generated during the process also causes changes in the properties of certain materials, such as softening and melting, resulting in bonding and coating between materials.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for mixing and discharging materials, characterized in that, The device includes a material cylinder, a discharge port, a feeding assembly, and a mixing assembly, wherein: The discharge port is provided at the bottom of the material cylinder, and the feeding components are symmetrically arranged on both sides of the central axis of the material cylinder. The diameter of the discharge port is smaller than the diameter of the material cylinder, and an inclined surface is formed between the material cylinder and the discharge port. The mixing component is arranged on the inclined surface.

2. The mixing and discharging apparatus as described in claim 1, characterized in that, The feeding assembly includes a first compressed air interface, a feeding hopper, a first air cannon chamber, a first valve, and a first nozzle, wherein: The input end of the first air cannon chamber is connected to the first compressed air interface and the feeding hopper, the first valve is provided between the output end of the first air cannon chamber and the first nozzle, and the feeding hopper is located on the top of the first air cannon chamber.

3. The mixing and discharging apparatus as described in claim 2, characterized in that, The volume of the first air cannon chamber is 0.5-50L, the pressure range of the first air cannon chamber is 0.1-1.5MPa, and the temperature range of the first air cannon chamber is 20-300℃.

4. The mixing and discharging apparatus as described in claim 2, characterized in that, The mixing assembly includes a second compressed air interface, a second air chamber, a second valve, and a second nozzle, wherein: The input end of the second air cannon chamber is connected to the second compressed air interface, and the second valve is provided between the output end of the second air cannon chamber and the second nozzle.

5. The mixing and discharging apparatus as described in claim 4, characterized in that, The angle between the second nozzle and the central axis of the barrel is 30-60°.

6. The apparatus for mixing and discharging materials as described in claim 5, characterized in that, When there are two or more second nozzles, the height of the second nozzles from the ground may be the same or different.

7. The mixing and discharging apparatus as described in claim 4, characterized in that, The first nozzle and the second nozzle are straight.

8. The apparatus for mixing and discharging materials as described in claim 4, characterized in that, The first nozzle is curved, and the outlet of the first nozzle faces the center point of all the first nozzles.

9. A method for preparing a mixing and discharging device, characterized in that, Using the apparatus for mixing and discharging materials as described in claims 1-8, the method comprises the following steps: The material enters the feed cylinder through the feeding assembly; The material first enters the first air cannon chamber from the feeding hopper. An external air source provides compressed gas to the first air cannon chamber through the first compressed gas interface. The pressure and temperature in the first air cannon chamber are adjusted to the first target value. The first valve is opened, and the material is ejected from the first nozzle along with the high-pressure gas, causing impact and mixing. An external air source supplies compressed gas to the second air chamber through the second compressed gas interface, adjusts the pressure and temperature inside the second air chamber to the second target value, opens the second valve, and the second nozzle impacts the material falling to the mixing component with airflow at a preset frequency. After secondary mixing and dispersion, the material falls from the discharge port.

10. The method for preparing the mixing and discharging device as described in claim 9, characterized in that, The material is fed into the barrel via the feeding assembly in the following ways: vacuum suction or screw feeding, with a feeding speed of 1-100 kg / h.

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