CN112891967A - Ultrafine powder particle aggregation cooling pipe type structure and ultrafine powder particle forming method - Google Patents
Ultrafine powder particle aggregation cooling pipe type structure and ultrafine powder particle forming method Download PDFInfo
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- CN112891967A CN112891967A CN202110097700.7A CN202110097700A CN112891967A CN 112891967 A CN112891967 A CN 112891967A CN 202110097700 A CN202110097700 A CN 202110097700A CN 112891967 A CN112891967 A CN 112891967A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/06—Solidifying liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
Abstract
The invention relates to an ultrafine powder particle aggregation cooling tube type structure and an ultrafine powder particle forming method, which are arranged in an ultrafine powder particle preparation system and comprise a gas outlet and reflux structure, a particle forming control structure, a first gas injection cooling structure and a bend turning and distributing structure which are sequentially connected; the front end of the air outlet and reflux structure is connected with a preposed high-temperature evaporator, and the rear end of the elbow turning and distributing structure is connected with a postposition collecting and cooling structure. This patent carries out accurate control to each stage in the submicron powder particle forming process through specific structure, including temperature field control, speed field control, the control of connecting between each structure makes its inside circulation and the even through each controlled part of steam that passes through, provides stable controllable condition for submicron powder particle takes shape, and the particle diameter of taking shape is even, the appearance is stable, and the dispersion is good.
Description
Technical Field
The invention belongs to the technical field of preparation of ultrafine powder particles, and particularly relates to an ultrafine powder particle aggregation cooling pipe type structure and an ultrafine powder particle forming method.
Background
When the forming and cooling technology for preparing the ultrafine powder particles by using an evaporation condensation gas phase method is used, the required prepared substances are firstly heated and gasified at high temperature, and then solidified and formed in a liquid state from a gas state, because the ultrafine powder particles required to be prepared are microscopic materials, mostly nano-scale, submicron-scale or micron-scale powder, the formed particles have small size, very high forming speed and very high temperature, and the technical principle of forming is simple, but the actual application is very difficult. If powder particles which can be used in batches are required to be prepared, the particle size is uniform, the morphology is stable, the dispersion is good, and the difficulty is higher.
The common method comprises a flaring structure, which slows down the flow speed of steam and then controls the particle formation; or the air blowing cooling structure is adopted to rapidly cool steam, and the two methods are either uneven in the temperature of the inner layer and the outer layer of the air flow or uneven in the internal flow state caused by the air blowing and air inlet of the inner layer, so that a large amount of ultra-small and ultra-large particles are caused to appear, and the subsequent use of the powder is influenced.
Disclosure of Invention
The invention aims to provide an ultrafine powder particle aggregation cooling pipe type structure and an ultrafine powder particle forming method, and aims to solve the problem that a large number of ultra-small and ultra-large particles are generated in the prior art, and the subsequent use of powder is influenced.
The invention is realized by the following technical scheme:
an ultrafine powder particle aggregation cooling pipe type structure is arranged in an ultrafine powder particle preparation system and comprises a gas outlet and reflux structure, a garbage reflux structure or garbage collection structure and a particle forming control structure which are sequentially connected;
the front end of the air outlet and reflux structure is connected with a preposed high-temperature evaporator, and the rear end of the particle forming control structure is connected with a postposition collecting or cooling structure;
the system for preparing the superfine powder particles further comprises a heating system arranged in the high-temperature evaporator and used for providing a heat source, a feeding system used for providing raw materials for the high-temperature evaporator, a circulating cooling system used for providing cooling, a gas source or circulating gas system used for providing current carrying and cooling and a pressure balance system used for providing pressure balance control. First air injection cooling structure and bend pipe turning and distributing structure
Furthermore, the front end of the air outlet and reflux structure is connected with an air outlet of the high-temperature evaporator, and the interior of the air outlet and reflux structure at least comprises a first channel for high-temperature steam to enter; and a heat preservation or heating device is arranged on the outer side of the first channel.
Furthermore, the interior of the garbage backflow structure or the garbage collection structure at least comprises a second channel, the front end of the second channel is connected with the first channel, and the rear end of the second channel is connected with the inner cavity of the particle forming control structure; and a heat preservation or heating device is arranged on the outer side of the second channel.
Furthermore, the front end of an inner cavity of the particle forming control structure is connected with the second channel, the rear end of the inner cavity is connected with the collecting or cooling structure, an ultrafine particle forming area is arranged in the inner cavity, a heat preservation or heating or cooling structure is arranged in the particle forming control structure, the temperature of the ultrafine particle forming area is indirectly controlled through heat conduction or heat radiation, and the speed of particles passing through the ultrafine particle forming area along with carrier gas is controlled through the speed of the carrier gas and the section size of the ultrafine particle forming area.
Furthermore, the rear end of the particle forming control structure also comprises a first air-jet cooling structure and a bend pipe turning and distributing structure; the first air injection cooling structure at least comprises a third channel inside, the front end of the first air injection cooling structure is communicated with the superfine powder particle forming area, the rear end of the first air injection cooling structure is connected with the bent pipe turning and distributing structure, a porous inner plate is arranged outside the third channel, and cooling air is uniformly injected into the third channel from the periphery.
Furthermore, the bent pipe turning and distributing structure comprises a turning cavity, wherein an air inlet pipeline and an air outlet pipeline are connected to the turning cavity, the air inlet pipeline is connected with the third channel, and the air outlet pipeline is connected with the collecting or cooling structure;
and the included angle between the axial central line of the air inlet pipeline and the axial central line of the air outlet pipeline is 30-150 degrees.
Furthermore, the cooling structure connected with the air outlet pipeline is a second air injection cooling structure, the second air injection cooling structure at least comprises an internal fourth channel, the front end of the fourth channel is connected with the air outlet pipeline of the bend pipe turning and distributing structure, and the rear end of the fourth channel is connected with the collecting and cooling structure;
1 to 12 gas injection holes with the diameter of 5-50mm are arranged in the fourth channel and used for injecting gas for cooling the central area of the fourth channel;
or a multi-hole gas ejector pipe is arranged at the axial center line of the fourth channel.
A method for forming an ultrafine particle aggregation cooling pipe structure, which uses the ultrafine particle aggregation cooling pipe structure of any one of the above, comprising the steps of:
s1, adding the material of the superfine powder particles to be prepared into a high-temperature evaporator, mixing the material vapor subjected to heating evaporation with carrier gas to form mixed gas, then entering a gas outlet and backflow structure from a gas outlet of the high-temperature evaporator, and controlling the temperature in the gas outlet and backflow structure to be higher than the melting point of the material to be prepared through heat preservation or heating;
s2, the mixed gas enters a particle forming control structure after passing through a gas outlet and backflow structure, a garbage backflow structure or a garbage collection structure, the temperature of each part of the ultrafine particle forming area is indirectly controlled through heat conduction or heat radiation in an ultrafine particle forming area in the particle forming control structure through a heat insulation structure or a heating structure or a cooling structure, the speed of the particles passing through each area inside along with the carrier gas is controlled through the carrier gas speed and the pipeline section size, stable and controllable conditions are provided for particle forming, substances to be prepared are changed from a gas state into a liquid state, the liquid state into a solid state, the gas state is mutually collided and condensed into smaller liquid cores, the smaller liquid cores are mutually collided and connected into larger liquid drops or the gas state is collided and condensed into larger liquid drops with the smaller liquid cores, the larger liquid drops are continuously collided and grown or solidified into solid particles, the smaller liquid cores and the solid particles are combined into larger solid particles or into a, the gas state and the solid particles are combined into larger solid particles or become a core-shell structure, and the solid particles are continuously cooled, so that particles with the expected particle size and morphology are prepared;
s3, the particles with the expected particle size and morphology, which are prepared in the step S2, enter the first air injection cooling structure under the carrying of carrier gas, cooling gas is uniformly injected into the inner channel from the periphery through the porous inner layer plate, and the cooling gas is mixed and cooled with the entering high-temperature gas and the formed particles;
s4, the cooled particles enter an elbow pipe turning and distributing structure under the carrying of carrier gas, defective product particles and good product particles in the particles are separated, the good product particles move to the next process under the carrying of the carrier gas, and the defective product particles are gathered to a garbage backflow structure or a garbage collection structure;
and S5, the good product particles enter a collecting structure under the carrying of the carrier gas, the formed superfine powder particles are separated from the carrier gas, the superfine powder particles are collected into products, and the carrier gas is discharged or recycled.
Further, step S41 is included after step S4, in which the good product particles enter the second jet cooling structure under the carrying of the carrier gas, and are cooled by jet toward the central area of the passage inside the second jet cooling structure through the cooling gas jet nozzles disposed inside the second jet cooling structure or the jet pipe disposed at the axial center line of the second jet cooling structure.
The invention has the beneficial effects that:
this patent carries out accurate control to each stage in the submicron powder particle forming process through specific structure, including temperature field control, speed field control, the control of connecting between each structure uses its inside circulation and the even through each controlled site of steam that passes through, provides stable controllable condition for submicron powder particle takes shape, and the particle diameter of taking shape is even, the appearance is stable, and the dispersion is good.
Drawings
FIG. 1 is a simplified view showing the inside of a structure of a cooling pipe for collecting ultrafine particles according to the present invention.
Description of the reference numerals
1. The device comprises an air outlet and reflux structure, 2 a garbage reflux structure or a garbage collection structure, 3 a particle forming control structure, 4 a first air injection cooling structure, 41 air injection at the first air injection cooling structure, 5 a bend pipe turning and distributing structure, 6 a second air injection cooling structure, 61 air injection at the second air injection cooling structure, 7 an inner cavity in a high-temperature evaporator, 8 a collection structure and 81 a collector.
Detailed Description
The technical solutions of the present invention are described in detail by the following examples, which are only exemplary and can be used for explaining and explaining the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limiting the present invention, and furthermore, the terms "first", "second", and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The structure is used for preparing ultrafine particles, including but not limited to metal ultrafine particles, and in the following examples, the preparation of metal ultrafine particles is taken as an example, but the structure is not limited to be used for preparing metal ultrafine particles.
When the evaporation condensation gas phase method is used for preparing nano-scale, submicron-scale or micron-scale micro-particle powder, a particle aggregation cooling pipe structure and a particle forming method are used, the particle aggregation cooling pipe structure is a channel, interface connection modes are designed in the channel to communicate all parts, each stage in the particle forming process is accurately controlled through a specific structure, the temperature field control, the speed field control and the control of the connection among all the structures are included, vapor flowing through the interior of the particle aggregation cooling pipe structure uniformly passes through all the controlled parts to provide stable and controllable conditions for particle forming, conditions are created for micro-particle forming, substances to be prepared are changed into liquid from gas state to liquid state, the liquid state is changed into solid state, the gas state is mutually collided and condensed into smaller liquid cores, the smaller liquid cores are mutually collided and connected into larger liquid drops or the gas state is collided with the smaller liquid cores to form larger liquid drops, the larger liquid drops are continuously collided and grown or solidified into solid particles, the smaller liquid core and the solid particles are combined into larger solid particles or a core-shell structure, the gas phase and the solid particles are combined into larger solid particles or a core-shell structure, and the solid particles are continuously cooled, so that particles with expected particle size and morphology are prepared. The formed particles have uniform particle size, stable appearance and good dispersion.
As shown in fig. 1, the present application provides an ultrafine particle collecting cooling pipe structure, which is installed in an ultrafine particle preparing system, and in the ultrafine particle preparing system of the present application, further includes a heating system installed in a high-temperature evaporator to provide a heat source, a feeding system to provide raw materials into the high-temperature evaporator, a circulating cooling system to provide cooling, a gas source or circulating gas system to provide carrying current and cooling, and a pressure balancing system to provide pressure balancing control, all of which are the prior art, and the connection relationship or structure thereof is not improved in the present application, and therefore, it is not described in detail in the present application, and all of which can be obtained by the prior patent documents.
Meanwhile, the application also provides various functional sections in the ultrafine powder particle gathering cooling pipe type structure, the sectional shapes, the caliber sizes and the like of the functional sections can be set to be the same or similar or deformed or reduced according to needs, the connection of the functional sections can be designed according to needs, and meanwhile, the length of the functional sections can be selected according to needs without affecting the implementation of the technical scheme; each functional segment may also be a plurality of segments, which are spliced or integrated into a whole structure, and is specifically adjusted according to actual needs (such as site, production amount, etc.), and is not limited or improved in the technical solution of the present application.
The focus of this application is the gathering cooling tube structure who sets up between high temperature evaporator and collection structure, including giving vent to anger and reflux structure, rubbish reflux structure or the garbage collection structure, particle formation control structure, first jet-propelled cooling structure, tubular diversion material distribution structure and the jet-propelled cooling structure of second that connect gradually.
The front end of the air outlet and reflux structure 1 is connected with an air outlet of an inner cavity in a front-mounted high-temperature evaporator, and the second air injection cooling structure is connected with the collection structure 8.
The inside of the gas outlet and reflux structure at least comprises a first channel for allowing high-temperature steam to enter, a gas outlet and reflux structure shell is arranged on the outer side of the first channel, a heat insulation structure is arranged between the first channel and the gas outlet and reflux structure shell, a reinforcing structure or heating equipment is arranged on the outer side of the first channel, the gas outlet and reflux structure shell is of a sandwich structure, circulating cooling liquid passes through the inside of the jacket structure, the first channel is made of a material which does not physically or/and chemically react with a material to be prepared, and the temperature inside the gas outlet and reflux structure is controlled to be higher than the melting point of the superfine powder particle material to be prepared through heat insulation or heating.
The garbage backflow structure or the garbage collection structure 2 at least comprises a second channel inside, the front end of the second channel is connected with the first channel, and the rear end of the second channel is connected with the inner cavity of the particle forming control structure; when guaranteeing that gas passes through, flow back after melting into liquid with the rubbish in top pipeline or the passageway, or in collecting the rubbish in top pipeline or the passageway into the garbage bin, prevent to hinder gaseous passing through in the passageway. The outside of the second channel is provided with a heat preservation or heating device, the temperature inside the garbage backflow structure is controlled to be higher than the melting point of the required preparation material through the heat preservation or heating device, or the temperature inside the ventilation channel of the garbage collection structure is controlled to be higher than the melting point of the required preparation material, and the temperature inside the garbage retention storage barrel is lower than the melting point of the required preparation material.
The particle forming control structure 3 is characterized in that the front end of an inner cavity is connected with a second channel, the rear end of the inner cavity is connected with a first air injection cooling structure, an ultrafine particle forming area is arranged in the particle forming control structure, the ultrafine particle forming area is of a channel structure and is a main place for particle forming control, a heat preservation or heating or cooling structure is arranged in the particle forming control structure, the temperature of the ultrafine particle forming area is indirectly controlled through heat conduction or heat radiation, the speed of particles passing through the ultrafine particle forming area along with carrier gas is controlled through the speed of the carrier gas and the section size of the ultrafine particle forming area, and stable and controllable conditions are provided for particle forming.
The particle forming control structure comprises an outer shell structure, a middle insulating layer and an inner heat conduction layer.
The outer shell structure is a jacket structure, and circulation cooling is performed in the jacket structure.
The middle heat-insulating layer is of a single-layer or multi-layer structure.
The inner heat conducting layer forms a heat-insulating channel, namely an ultra-fine powder particle forming area, and is used for indirectly controlling the temperature of a substance flowing in the channel in a heat conduction or heat radiation mode.
Through the particle forming control structure, a substance to be prepared is changed into a liquid state from a gas state, the liquid state is changed into a solid state, the gas state is mutually collided and condensed into a smaller liquid core, the smaller liquid core is mutually collided and condensed into a larger liquid drop or the gas state is collided with the smaller liquid core to form a larger liquid drop, the larger liquid drop continuously collides with each other to grow or is solidified into solid particles, the smaller liquid core and the solid particles are combined into larger solid particles or a core-shell structure, the gas state and the solid particles are combined into larger solid particles or a core-shell structure, and the solid particles are continuously cooled, so that particles with the expected particle size and shape are prepared.
The first air injection cooling structure 4 at least comprises a third channel inside, the front end of the first air injection cooling structure is communicated with an ultrafine powder particle forming area, the rear end of the first air injection cooling structure is connected with a direction-changing material distributing structure, a porous inner plate is arranged in the third channel, cooling air is uniformly sprayed into the third channel from the periphery of the third channel, and soft agglomeration or hard agglomeration of formed particles when the formed particles are agglomerated at a high temperature is prevented.
The bent pipe turning and distributing structure 5 comprises a turning cavity, and an air inlet pipeline and an air outlet pipeline are connected to the turning cavity, wherein the air inlet pipeline is connected with the third channel, and the air outlet pipeline is connected with the collecting or cooling structure; the included angle between the axial central line of the air inlet pipeline and the axial central line of the air outlet pipeline is 30-150 degrees;
the cooling structure that the pipeline that gives vent to anger is connected is second jet-propelled cooling structure 6, second jet-propelled cooling structure includes inside fourth passageway at least, the front end and the return bend diversion of fourth passageway divide the material pipeline to be connected of giving vent to anger of structure, the rear end with collect the structural connection.
1 to 12 gas injection holes with the diameter of 5-50mm are arranged in the fourth channel and used for injecting gas for cooling the central area of the fourth channel; or a multi-hole gas ejector pipe is arranged at the axial center line of the fourth channel.
The present application also provides a method for forming ultrafine particles using the ultrafine particle aggregation cooling tube structure of any one of the above, comprising the steps of:
s1, adding the material of the submicron powder particles to be prepared into a high-temperature evaporator, mixing the material vapor subjected to heating evaporation with carrier gas to form mixed gas, then entering a gas outlet and backflow structure from a gas outlet of the high-temperature evaporator, and controlling the temperature inside the gas outlet and backflow structure to be higher than the melting point of the material to be prepared through heat preservation or heating.
S2, the mixed gas enters a particle forming control structure after passing through a gas outlet and backflow structure, a garbage backflow structure or a garbage collection structure, the temperature of each part of the ultrafine particle forming area is indirectly controlled through heat conduction or heat radiation in an ultrafine particle forming area in the particle forming control structure through a heat insulation structure or a heating structure or a cooling structure, the speed of the particles passing through each area inside along with the carrier gas is controlled through the carrier gas speed and the pipeline section size, stable and controllable conditions are provided for particle forming, substances to be prepared are changed from a gas state into a liquid state, the liquid state into a solid state, the gas state is mutually collided and condensed into smaller liquid cores, the smaller liquid cores are mutually collided and connected into larger liquid drops or the gas state is collided and condensed into larger liquid drops with the smaller liquid cores, the larger liquid drops are continuously collided and grown or solidified into solid particles, the smaller liquid cores and the solid particles are combined into larger solid particles or into a, the gas state and the solid particles are combined into larger solid particles or become a core-shell structure, and the solid particles are continuously cooled, so that particles with expected particle size and morphology are prepared. In the technical solution of the present application, the smaller liquid core is only a relative concept and does not refer to a specific size, and similarly, the larger liquid droplet is also only a relative concept and does not refer to a specific size, and therefore, it is not necessary to specify how many liquid cores of specific sizes are the smaller liquid cores, and how many liquid droplets of specific sizes are the larger liquid droplets.
S3, the particles with the expected particle size and morphology prepared in the step S2 enter the first air injection cooling structure under the carrying of carrier gas, cooling air is evenly injected into the inner channel from the periphery through the porous inner layer plate, and the cooling air is mixed and cooled with the entering high-temperature gas and the formed particles.
And S4, the cooled particles enter a direction-changing material-distributing structure under the carrying of the carrier gas, defective particles and good particles in the particles are separated, the good particles move to the next process under the carrying of the carrier gas, and the defective particles are gathered to a garbage backflow structure or a garbage collection structure.
And S41, allowing the good product particles to enter the second air injection cooling structure under the carrying of the carrier gas, and performing air injection cooling to the central area of the channel inside the second air injection cooling structure through a cooling air nozzle arranged inside the second air injection cooling structure or an air injection pipe arranged at the axial center line of the second air injection cooling structure.
And S5, the good product particles enter a collecting structure under the carrying of the carrier gas, the formed superfine powder particles are separated from the carrier gas, the superfine powder particles are collected into products, and the carrier gas is discharged or recycled.
The collected cooled formed particles are collected as a product and the carrier gas is discharged or recycled.
Through the cooperation and connection of the structures, the device is connected with a front-arranged high-temperature evaporator and a rear-arranged collecting and cooling structure, a heating system providing a heat source is arranged in the high-temperature evaporator, a front-arranged feeding system providing raw materials of the high-temperature evaporator is provided with a cooling circulating cooling system, a current-carrying and cooling gas source or circulating gas system is provided, a pressure balance system providing pressure balance control is jointly matched, the continuous circulating industrial production process of particle aggregation cooling forming is completed, and nano-scale, submicron-scale or micron-scale powder with uniform particle size, stable appearance and good dispersion is prepared.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A submicron powder particle gathering cooling tube type structure is characterized in that the submicron powder particle gathering cooling tube type structure is arranged in a submicron powder particle preparation system and comprises a gas outlet and reflux structure, a garbage reflux structure or a garbage collection structure and a particle forming control structure which are sequentially connected;
the front end of the air outlet and reflux structure is connected with a preposed high-temperature evaporator, and the rear end of the particle forming control structure is connected with a postposition collecting or cooling structure;
the superfine powder particle preparation system also comprises a heating system arranged in the high-temperature evaporator and used for providing a heat source, a feeding system used for providing raw materials for the high-temperature evaporator, a circulating cooling system used for providing cooling, a gas source or circulating gas system used for providing current carrying and cooling, a pressure balance system used for providing pressure balance control, a first air injection cooling structure and a bend pipe turning and distributing structure.
2. The ultra-fine powder particle aggregation cooling pipe type structure as claimed in claim 1, wherein the front end of the gas outlet and return structure is connected with a gas outlet of the high-temperature evaporator, and the interior of the gas outlet and return structure at least comprises a first channel for the high-temperature steam to enter; and a heat preservation or heating device is arranged on the outer side of the first channel.
3. The submicron powder particle aggregation cooling tube structure as set forth in claim 2, wherein the inside of the garbage reflow structure or the garbage collection structure comprises at least a second channel, the front end of the second channel is connected with the first channel, and the rear end of the second channel is connected with the inner cavity of the particle formation control structure; and a heat preservation or heating device is arranged on the outer side of the second channel.
4. The ultra-fine powder particle aggregation cooling pipe type structure as claimed in claim 3, wherein the front end of the inner cavity of the particle forming control structure is connected with the second channel, the rear end of the inner cavity is connected with the collecting or cooling structure, the inner part of the inner cavity is provided with an ultra-fine powder particle forming area, the inner part of the particle forming control structure is provided with a heat preservation or heating or cooling structure, the temperature of the ultra-fine powder particle forming area is indirectly controlled through heat conduction or heat radiation, and the speed of particles passing through the ultra-fine powder particle forming area along with the carrier gas is controlled through the speed of the carrier gas and the sectional dimension of the ultra-fine powder particle forming.
5. The submicron powder particle aggregation cooling tube structure as set forth in claim 4, characterized in that the rear end of the particle forming control structure further comprises a first air-jet cooling structure and a bend pipe direction-changing material-distributing structure; the first air injection cooling structure at least comprises a third channel inside, the front end of the first air injection cooling structure is communicated with the superfine powder particle forming area, the rear end of the first air injection cooling structure is connected with the bent pipe turning and distributing structure, a porous inner plate is arranged outside the third channel, and cooling air is uniformly injected into the third channel from the periphery.
6. The submicron powder particle gathering cooling tube type structure as set forth in claim 5, wherein the bend pipe direction-changing material-distributing structure comprises a direction-changing cavity, an air inlet pipe and an air outlet pipe are connected to the direction-changing cavity, wherein the air inlet pipe is connected to the third channel, and the air outlet pipe is connected to the collecting or cooling structure;
and the included angle between the axial central line of the air inlet pipeline and the axial central line of the air outlet pipeline is 30-150 degrees.
7. The submicron powder particle aggregation cooling pipe type structure as set forth in claim 6, wherein the cooling structure connected with the gas outlet pipe is a second gas injection cooling structure, the second gas injection cooling structure at least comprises an internal fourth channel, the front end of the fourth channel is connected with the gas outlet pipe of the bend pipe direction-changing material distribution structure, and the rear end of the fourth channel is connected with the collection cooling structure;
1 to 12 gas injection holes with the diameter of 5-50mm are arranged in the fourth channel and used for injecting gas for cooling the central area of the fourth channel;
or a multi-hole gas ejector pipe is arranged at the axial center line of the fourth channel.
8. A method for forming ultrafine particles by using the ultrafine particle aggregation cooling channel structure according to any one of claims 1 to 7, comprising the steps of:
s1, adding the material of the superfine powder particles to be prepared into a high-temperature evaporator, mixing the material vapor subjected to heating evaporation with carrier gas to form mixed gas, then entering a gas outlet and backflow structure from a gas outlet of the high-temperature evaporator, and controlling the temperature in the gas outlet and backflow structure to be higher than the melting point of the material to be prepared through heat preservation or heating;
s2, the mixed gas enters a particle forming control structure after passing through a gas outlet and backflow structure, a garbage backflow structure or a garbage collection structure, the temperature of each part of the ultrafine particle forming area is indirectly controlled through heat conduction or heat radiation in an ultrafine particle forming area in the particle forming control structure through a heat insulation structure or a heating structure or a cooling structure, the speed of the particles passing through each area inside along with the carrier gas is controlled through the carrier gas speed and the pipeline section size, stable and controllable conditions are provided for particle forming, substances to be prepared are changed from a gas state into a liquid state, the liquid state into a solid state, the gas state is mutually collided and condensed into smaller liquid cores, the smaller liquid cores are mutually collided and connected into larger liquid drops or the gas state is collided and condensed into larger liquid drops with the smaller liquid cores, the larger liquid drops are continuously collided and grown or solidified into solid particles, the smaller liquid cores and the solid particles are combined into larger solid particles or into a, the gas state and the solid particles are combined into larger solid particles or become a core-shell structure, and the solid particles are continuously cooled, so that particles with the expected particle size and morphology are prepared;
s3, the particles with the expected particle size and morphology, which are prepared in the step S2, enter the first air injection cooling structure under the carrying of carrier gas, cooling gas is uniformly injected into the inner channel from the periphery through the porous inner layer plate, and the cooling gas is mixed and cooled with the entering high-temperature gas and the formed particles;
s4, the cooled particles enter an elbow pipe turning and distributing structure under the carrying of carrier gas, defective product particles and good product particles in the particles are separated, the good product particles move to the next process under the carrying of the carrier gas, and the defective product particles are gathered to a garbage backflow structure or a garbage collection structure;
and S5, the good product particles enter a collecting structure under the carrying of the carrier gas, the formed superfine powder particles are separated from the carrier gas, the superfine powder particles are collected into products, and the carrier gas is discharged or recycled.
9. The method of claim 8, further comprising a step S41 after the step S4, wherein the good particles are carried by the carrier gas and enter the second air-jet cooling structure, and the good particles are air-jet cooled toward a central region of the passage inside the second air-jet cooling structure through a cooling air nozzle provided inside the second air-jet cooling structure or an air-jet pipe provided at an axial centerline of the second air-jet cooling structure.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110097700.7A CN112891967A (en) | 2021-01-25 | 2021-01-25 | Ultrafine powder particle aggregation cooling pipe type structure and ultrafine powder particle forming method |
| KR1020237003994A KR20230034378A (en) | 2021-01-25 | 2021-08-27 | Ultra-fine particle agglomeration cooling tubular structure and method for forming ultra-fine particles |
| PCT/CN2021/115065 WO2022156217A1 (en) | 2021-01-25 | 2021-08-27 | Ultrafine powder particle aggregation cooling tube type structure and ultrafine powder particle forming method |
| JP2023507584A JP2023536335A (en) | 2021-01-25 | 2021-08-27 | Tubular Structure for Agglomeration Cooling of Ultrafine Powder Particles and Method for Forming Ultrafine Particles |
| TW111102252A TWI820578B (en) | 2021-01-25 | 2022-01-19 | Ultrafine powder particle aggregation cooling tube structure and method for forming ulterfine powder particle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022156229A1 (en) * | 2021-01-25 | 2022-07-28 | 钟笔 | Controller for controlling formation of ultrafine powder particles |
| WO2022156224A1 (en) * | 2021-01-25 | 2022-07-28 | 钟笔 | Ultrafine powder particle aggregation and cooling tank structure and ultrafine powder particle forming method |
| WO2022156217A1 (en) * | 2021-01-25 | 2022-07-28 | 钟笔 | Ultrafine powder particle aggregation cooling tube type structure and ultrafine powder particle forming method |
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| WO2022156224A1 (en) * | 2021-01-25 | 2022-07-28 | 钟笔 | Ultrafine powder particle aggregation and cooling tank structure and ultrafine powder particle forming method |
| WO2022156217A1 (en) * | 2021-01-25 | 2022-07-28 | 钟笔 | Ultrafine powder particle aggregation cooling tube type structure and ultrafine powder particle forming method |
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