KR20170055831A - Hybrid jettmill - Google Patents
Hybrid jettmill Download PDFInfo
- Publication number
- KR20170055831A KR20170055831A KR1020150159104A KR20150159104A KR20170055831A KR 20170055831 A KR20170055831 A KR 20170055831A KR 1020150159104 A KR1020150159104 A KR 1020150159104A KR 20150159104 A KR20150159104 A KR 20150159104A KR 20170055831 A KR20170055831 A KR 20170055831A
- Authority
- KR
- South Korea
- Prior art keywords
- jet mill
- air
- mill body
- jet
- center
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/06—Jet mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C19/00—Other disintegrating devices or methods
- B02C19/0012—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain)
- B02C19/0043—Devices for disintegrating materials by collision of these materials against a breaking surface or breaking body and/or by friction between the material particles (also for grain) the materials to be pulverised being projected against a breaking surface or breaking body by a pressurised fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/06—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in annular, tubular or hollow conical form
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
Description
The present invention relates to a jet mill. And more particularly, to a hybrid jet mill capable of separating and collecting nanoparticles.
Nanotechnology refers to the technology related to particles belonging to the area of nanotechnology that manipulates molecules or atoms with particles of at least one dimension less than 100 nm of which the object to be treated is to fabricate new materials, structures, machines, devices, do.
Nanostructured materials are being studied extensively because nano powders have properties that micron or submicron powders do not have in various fields of application. This is because the effect of surface area increase and capillary effect Most of them appear.
The reason why nano powder materials are of particular interest is that there are many possibilities that can be processed and used in other forms besides the use of powders themselves, such as optical coatings, heat shielding coatings and functional sintered parts, Can be used in the form of a composite material. Thus, a wide range of applications are expected in the fields of electronics, optoelectronics, magnetic fields, biomedicals, pharmaceuticals, cosmetics, energy, catalysts and structures.
The pulverization process of particles for producing nano powder material can be divided into dry pulverization and wet pulverization. For dry pulverization, a jet mill and a high speed hammer mill, in which a classifier is built or externally, are mainly used. However, it is known that jet mill pulverization is most suitable for the production of high purity highly functional superfine powder among these pulverizers. However, up to now, powder production of 1 탆 or less has been mainly produced by a wet grinding process in a small amount.
The jet mill is classified into air flow type, air flow type, impingement plate impingement type and composite type jet mill according to the principle of pulverizing the jet flow, and it is possible to obtain dry pulverization and ultrafine powder, It is possible to produce product powder in a short period of time and to produce a temperature drop due to the use of compressed air and to cause a temperature drop due to the use of compressed air. Therefore, it can be crushed at room temperature and has excellent interconnection with other processes such as dry mixing and coating, It has the advantage of excellent disintegration effect of dispersing into single particles and the use of compressible air as a grinding medium, so that there is no contamination or destruction of final product. However, there is a disadvantage in that a large amount of compressed air or steam is required, a large power is required, and a large amount of air is contained in the pulverized material, thus necessitating a separate collecting device.
In order to produce ultrafine powder having a particle size of 1 mu m, it is necessary to satisfy a condition that particles can sufficiently collide even at a particle diameter of 1 mu m. For this purpose, it is essential to accelerate the supersonic region at a velocity of 300 m / s or more.
It is an object of the present invention to provide a hybrid jet mill in which airflow, airflow, and collision-protruding stone are combined.
Further, the present invention provides a hybrid jet mill capable of maximizing the collision between particles and a wall or the collision between particles through the collision plate optimal placement and circulating airflow formation within an acceleration distance with acceleration of the supersonic region band for ultrafine powder milling .
The present invention relates to a jet mill having a cylindrical jet mill body, a plurality of side air nozzles arranged on the outer wall of the jet mill body and inclined with respect to the center of the jet mill body for jetting high speed air, A plurality of impingement plates positioned in the jet mill body in front of the ejection direction of the respective air nozzles, and a central air nozzle disposed at approximately the center of the disc-shaped cavity bottom of the jet mill body and rotating and ejecting high-pressure air And a plurality of the jet mills.
According to another aspect of the present invention, there is provided a hybrid jet mill, wherein the impingement plate is disposed between a center air nozzle and a side air nozzle.
According to another embodiment of the present invention, the central air nozzle has a substantially T-shaped configuration including a vertical tube extending vertically along the axial direction of the jet mill body and a horizontal tube extending perpendicularly to the vertical tube at the upper end of the vertical tube, And the horizontal tube is provided with a pair of jet holes on a diagonal line so as to be rotated by the jetting force of the air.
According to another embodiment of the present invention, there is provided a hybrid jet mill, wherein a plurality of additional injection holes are provided in the vertical tube.
According to another aspect of the present invention, there is provided a hybrid jet mill, wherein the outlet is provided with a body for preventing the discharge of coarse particles.
According to another embodiment of the present invention, there is provided a hybrid jet mill, which is connected to an outlet and in which a cyclone and a dust collector, which can classify particles in a thick order, are connected in series.
According to another aspect of the present invention, there is provided a hybrid jet mill, wherein the cyclone and the dust collector include first to third cyclones, a membrane bag filter dust collector, and an electrostatic precipitator.
According to another aspect of the present invention, there is provided a hybrid jet mill, wherein the side air nozzles are designed in the form of a venturi tube.
The hybrid jet mill provided by the present invention is advantageous in that it can be pulverized into ultrafine powders in a compact size by a jet mill in which air flow, air current collision and collision plate collision type are combined.
Further, the hybrid jet mill provided by the present invention further has a central nozzle that rotates at the center of the main body, thereby maximizing the collision between particles and also minimizing the kinetic energy of the airflow.
1 is a view showing a hybrid jet mill in which first to third cyclones, a membrane bag filter dust collector, and an electrostatic precipitator are installed in series in accordance with an embodiment of the present invention;
2 is a partially cutaway perspective view of a hybrid jet mill according to an embodiment of the present invention,
3 is a perspective view illustrating a central nozzle of the hybrid jet mill according to an embodiment of the present invention,
FIG. 4 is a schematic view showing an airflow formed in a hybrid jet mill according to an embodiment of the present invention. FIG.
Hereinafter, the present invention will be described in detail with reference to the drawings.
1 is a view showing a hybrid jet mill in which first to third cyclones, a membrane bag filter dust collector, and an electrostatic precipitator are installed in series according to an embodiment of the present invention. The
The
On the other hand, an air pump (not shown) for supplying compressed air to a plurality of side and
2 is a partially cutaway perspective view of a hybrid jet mill according to an embodiment of the present invention. In the
Since the
A plurality of
Further, a
3 is a perspective view illustrating a central nozzle of the hybrid jet mill according to an embodiment of the present invention. 3, the
In addition, a plurality of
Referring again to FIG. 3, the
FIG. 4 is a view schematically showing airflow formed in a hybrid jet mill according to an embodiment of the present invention. (1) shows flows flowing through the side air nozzles 120 (see FIG. 3). When high pressure air is injected through the
On the other hand, (5) shows the air flow injected from the
That is, the hybrid jet mill according to the present invention greatly increases the number of times that the particles to be ground can collide with each other and the number of times that the particles can collide with the
100: jet mill 110: jet mill body
120: side air nozzle 122: air supply pipe
124: branch 130: raw material supply pipe
140: impingement plate 150: central air nozzle
160: outlet 170:
200: first cyclone 300: second cyclone
400: Third cyclone 500: Membrane bag filter dust collector
600: Electrostatic precipitator
Claims (8)
A plurality of side air nozzles disposed on side walls of the jet mill body and inclined with respect to the center of the jet mill body for jetting high-speed air;
An outlet disposed approximately at the center of the upper portion of the jet mill body;
A plurality of impingement plates located in the jet mill body in front of the jet directions of the respective air nozzles; And
And a central air nozzle which is disposed substantially at the center of the disc-shaped cavity bottom of the jet mill body and which rotates and ejects high-pressure air.
Wherein the impingement plate is disposed between the central air nozzle and the side air nozzles.
The central air nozzle has a substantially T-shaped configuration comprising a vertical tube extending vertically along the axial direction of the jet mill body and a horizontal tube extending perpendicularly to the vertical tube at the upper end of the vertical tube,
Wherein the horizontal tube has at least one jet hole so as to be rotatable by the jetting force of the air.
Characterized in that the vertical tube is provided with a plurality of additional injection holes.
Wherein the outlet is provided with a body for preventing the discharge of coarse particles.
And a cyclone and a dust collector capable of classifying the particles in a thick order are connected in series.
Wherein the cyclone and the dust collector comprise first to third cyclones, a membrane bag filter dust collector, and an electrostatic precipitator.
Wherein the side air nozzles are designed in the form of a venturi tube.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020150159104A KR20170055831A (en) | 2015-11-12 | 2015-11-12 | Hybrid jettmill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020150159104A KR20170055831A (en) | 2015-11-12 | 2015-11-12 | Hybrid jettmill |
Publications (1)
Publication Number | Publication Date |
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KR20170055831A true KR20170055831A (en) | 2017-05-22 |
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Family Applications (1)
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KR1020150159104A KR20170055831A (en) | 2015-11-12 | 2015-11-12 | Hybrid jettmill |
Country Status (1)
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109317242A (en) * | 2018-09-20 | 2019-02-12 | 湖北昌丰粮机有限公司 | A kind of rice polishing residue treatment dedusting device |
KR200490033Y1 (en) * | 2018-06-12 | 2019-09-11 | 농업회사법인 주식회사 한국대농농업 | Rice swipper using compressed air |
KR102530524B1 (en) * | 2022-08-19 | 2023-05-10 | 이승민 | Manufacuturing Method of 2D Layered Material using Dry Exfoliation and 2D Layered Material Manufactured by the Same |
KR102611645B1 (en) * | 2023-05-03 | 2023-12-08 | 이승민 | Manufacuturing Method of 2D Layered Material using Dry Exfoliation and 2D Layered Material Manufactured by the Same |
-
2015
- 2015-11-12 KR KR1020150159104A patent/KR20170055831A/en unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200490033Y1 (en) * | 2018-06-12 | 2019-09-11 | 농업회사법인 주식회사 한국대농농업 | Rice swipper using compressed air |
CN109317242A (en) * | 2018-09-20 | 2019-02-12 | 湖北昌丰粮机有限公司 | A kind of rice polishing residue treatment dedusting device |
KR102530524B1 (en) * | 2022-08-19 | 2023-05-10 | 이승민 | Manufacuturing Method of 2D Layered Material using Dry Exfoliation and 2D Layered Material Manufactured by the Same |
KR102611645B1 (en) * | 2023-05-03 | 2023-12-08 | 이승민 | Manufacuturing Method of 2D Layered Material using Dry Exfoliation and 2D Layered Material Manufactured by the Same |
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