KR101523762B1

KR101523762B1 - A Grinding Apparatus for Fine Powder

Info

Publication number: KR101523762B1
Application number: KR1020130028400A
Authority: KR
Inventors: 오명훈; 방대석; 김봉석; 이상훈
Original assignee: 금오공과대학교 산학협력단
Priority date: 2013-03-18
Filing date: 2013-03-18
Publication date: 2015-05-28
Also published as: KR20140114919A; WO2014148753A1

Abstract

The apparatus for producing a fine powder according to the present invention comprises a hopper for feeding a pulverized material, a pulverizing part for pulverizing the supplied pulverized material to produce a fine powder, and a fine powder produced by the pulverizing part, Wherein the fine grinding portion includes a fine grinding chamber for forming a space therein, a pair of grinding chambers which are accommodated in the space so as to face the grinding surfaces so as to face each other and grind the pulverized material to discharge it as fine powder And a grinding water supply pipe for supplying grinding water discharged from the hopper part between the grinding surfaces, wherein the grinding grinding grinders are provided with grinding grooves for grinding the grinding grinders such that the grinders are gradually finely ground, The scale size of the blade gradually decreases along the discharge direction of the fine powder.
In the apparatus for producing fine powder according to the present invention, since the cutting edge of the cutting plate gradually decreases in size along the discharge direction of the fine powder, the grinding- So that the pulverized material can be pulverized to a desired level of dense particle size by a single pulverizing step.

Description

[0002] A Grinding Apparatus for Fine Powder [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fine powder producing apparatus for pulverizing pulverized materials such as waste tires supplied in the form of chips and the like into fine powder, The present invention relates to a fine powder producing apparatus capable of maximizing the grinding efficiency of a pulverized product by constituting a fine powder by rotating the cutting edge so that the scale size of the cutting edge decreases sequentially along the discharging direction of the fine powder.

Due to the rapid industrialization and urbanization tendency of modern society, various industrial products made of various materials are being mass produced, and various industrial wastes resulting from the disposal of these industrial products are also generated in large quantities.

When these industrial wastes are left in the yard for a long time or incinerated, the environment is seriously polluted due to the discharge of pollutants, and the recyclable resources contained in these wastes are discarded as they are.

Recently, researches for actively recycling waste resources discharged from industrial wastes have been actively carried out. Typical examples thereof include waste materials such as synthetic resin materials or rubber materials obtained from waste wire covering or waste tires It can be said that it is crushed and recycled as sidewalk block or building materials.

However, since the grinding apparatuses according to the related art use grinding blades that rotate so as to mesh with each other, there is a limit in the effective grinding area and in increasing the rotation speed of the blades, Is a method using a constant cutting edge. In one grinding step, the particle size of the resultant powder is the same according to the roughness of the blade. Therefore, it is inevitable to sequentially crush the grinding object while changing the roughness of the blade Respectively.

Therefore, in order to crush the waste resources to a desired level of dense particle size, the conventional crushing apparatus must undergo a plurality of crushing processes (for example, a granulation crushing process, a neutral crushing process and a fine crushing process) Therefore, there is a problem in that the configuration of the apparatus is large as a whole, and thus the production cost is greatly increased.

In addition, since the conventional grinding apparatuses can obtain a fine powder having a desired particle size only through a plurality of processes, the entire process time is greatly increased when a large amount of the pulverized material is processed, There was also a problem to reduce.

[Patent Document 1] Published Korean Patent Application No. 2002-0076661 (published on October 11, 2002)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for grinding a milled product by grinding a milled product in a single grinding step, To thereby produce a fine powder-producing apparatus capable of pulverizing at a high-density fine particle size.

Another object of the present invention is to provide a fine powder producing apparatus having a cooling device for preventing damage to fine powder pulverized by processing heat generated in a cutting blade for rotating at high speed as described above .

It is still another object of the present invention to provide a dust collecting apparatus which can prevent contamination of dust and dust contained in the pulverized powder into fine pulverized powder and minimize environmental pollution in the workplace And to provide a fine powder production apparatus.

In order to achieve the above object, the apparatus for producing fine powder according to the present invention comprises a hopper for feeding a pulverized material, a pulverizing part for pulverizing the supplied pulverized material to produce a fine powder, And a fine powder transferring unit for transferring and collecting the fine powder produced in the forming unit, wherein the fine pulverizing unit includes a fine pulverizing chamber for forming a space therein, And a grinding water supply pipe for supplying grinding water discharged from the hopper part between the grinding surfaces, wherein the grinding grates are gradually finely pulverized So that the size of the scale of the cutting edge formed on the cutting surface gradually decreases along the discharge direction of the fine powder.

The grinding unit may further include a driving motor for rotating at least one of the pair of cutting plates, wherein the cutting plate is formed in a disc shape having a cutting surface formed in a ring shape, Like cutting edge is arranged in the circumferential direction so that the fine powder that has been cut out can be discharged in the outer diameter direction of the cutting board by centrifugal force.

The cutting plate may further include a first cutting surface, a second cutting surface formed on the outer side of the first cutting surface, and a groove formed between the first cutting surface and the second cutting surface, The scale size of the cutting edge formed on the surface is larger than the scale size of the cutting edge formed on the second cutting surface.

Further, the fine pulverizing unit may further include a first cooling pipe installed at one side of the fine pulverizing chamber, through which a fluid for cooling the inside of the fine pulverizing chamber flows.

In addition, the cutting plate may include a fixed first cutting plate and a second cutting plate rotatably connected to the driving motor, wherein one of the first cutting plate and the second cutting plate has a through hole at the center thereof, And the pulverized water supply pipe is formed to communicate the outlet of the hopper part with the through hole so that the pulverized material is supplied between the cutting surfaces.

In addition, any one of the first cutting plate and the second cutting plate, which does not have the through-hole, may be provided at a central portion corresponding to the through-hole so as to be easily supplied to the cutting surface And a concave portion is formed.

The fine powder conveying portion may include an intake fan for sucking and conveying fine powder discharged into the fine pulverizing chamber through the first conveyance pipe together with air, and a suction fan installed in the middle of the first conveying pipe, And a cyclone collector for separating and collecting the fine powder.

The fine powder conveying unit may further include a dust collector connected to the suction fan through a second conveyance pipe, wherein the dust collector collects dust or dust contained in the air passed through the first conveyance pipe .

The first transfer pipe may further include a second cooling pipe through which a fluid for cooling the air and the fine powder flows.

In addition, the fine powder transfer part may further include a vibration screen for sorting the fine powder collected in the cyclone collector according to the particle size.

In the apparatus for producing fine powder according to the present invention, since the cutting edge of the cutting plate gradually decreases in size along the discharge direction of the fine powder, the grinding- So that the pulverized material can be pulverized to a desired level of dense particle size by a single pulverizing step.

The apparatus for producing a fine powder according to the present invention further comprises a first and a second cooling tube through which a cooling fluid flows to one side of a first conveyance pipe through which a pulverized material is crushed and a pulverized fine powder is conveyed There is an advantage that it is possible to effectively prevent the crushed fine powder from being easily damaged due to the nature of the rubber material due to the processing heat generated in the crushing cutting board rotating at high speed.

In addition, since the apparatus for producing fine powder according to the present invention is provided with a dust collecting device for separately separating dust, dust and the like in the process of collecting fine powder, dust or dust which is industrially hardly used, It is possible to prevent contamination and to minimize environmental pollution in the workplace.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing the overall structure of a fine powder producing apparatus according to an embodiment of the present invention;
FIGS. 2A and 2B are a plan view and a partial cross-sectional view showing the configuration of a disk-shaped cutting board applied to the apparatus for producing fine powder of FIG.
3 is a view showing an actual shape of the cutting board shown in Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a plan view showing the configuration of a disk-shaped cutting board applied to the apparatus for producing fine powder of FIG. 1, and FIG. 2 is a plan view showing the configuration of a disk- Fig. 3 is a view showing the actual shape of the cutting board shown in Fig. 2. Fig.

The apparatus for producing a fine powder according to the present invention comprises a hopper portion 1 for supplying a pulverized material (not shown), a fine pulverizing portion 2 for pulverizing the supplied pulverized material to produce a fine powder, And a fine powder transfer part 3 for transferring and collecting the fine powder produced in the part 2.

At this time, the hopper part 1 can be preferably implemented using various well-known hoppers within the range of performing the function of supplying the pulverized material to the pulverizing part 2. [

The pulverized material may be a waste tire processed in a chip form, a wire covering the waste wire, or the like, but is not limited thereto. If necessary, the material may be various other materials or waste products that require pulverization to be.

The fine pulverizing unit 2 includes a fine grinding chamber S for forming a space therein, a pair of cutting plates 30 accommodated in the space for grinding the pulverized material and discharging the pulverized material to fine powder, And a pulverized water supply pipe (25) for supplying the pulverized material discharged from the part (1) between the cutting boards (30).

The milling unit 2 further includes a driving motor 40 that rotates at least one of the pair of cutting plates 30. In this embodiment, the pair of cutting plates 30, And the other is connected to the driving motor 40 so as to be rotatable.

At this time, the driving motor can be preferably implemented using a conventional electric motor. In the present embodiment, the electric motor is configured to rotate at 2500 rpm to 3600 rpm as an example.

A through hole 31 is formed at a central portion of any one of the fixed cutting board 30 and the rotatable cutting board 30 and the pulverized water supply pipe 25 is connected to the outlet of the hopper unit 1 And the through holes 31 are communicated with each other to feed the pulverized material between the cutting surfaces 33 and 35.

In addition, any one of the cutting plates 30 on which the through holes 31 are not formed is provided with a plurality of through holes 31 corresponding to the through holes 31 so as to be easily supplied to the cutting surfaces 33 and 35 A concave portion (not shown) having a predetermined width may be further formed in the central portion as a position.

As described above, in the present embodiment, only one of the pair of cutting boards 30 is coupled to be rotatable. However, the present invention is not limited thereto. If necessary, the two cutting boards 30 can be rotated Preferably to rotate in opposite directions to improve the grinding efficiency).

On the other hand, when the object to be ground is a synthetic resin material weak in heat or rubber material, the physical and / or chemical properties of the ground fine powder are changed due to accumulation of processing heat due to friction of the cutting board 30, There is a possibility that it will not be utilized.

Accordingly, in order to prevent this, in the present invention, the fine pulverizing unit 2 is installed at one side of the fine pulverizing chamber S, and a first cooling pipe (not shown) for flowing fluid for cooling the inside of the fine pulverizing chamber S 26), wherein the cooling fluid may be composed of a liquid (water-cooled) such as water or a refrigerant, or a gas (air-cooled) such as air, and the first cooling pipe 26 may be made of a material having excellent thermal conductivity And can be constructed using copper pipes.

The apparatus for producing fine powder according to the present invention can effectively prevent the crushed fine powder from being easily damaged due to the nature of the rubber material due to the processing heat generated from the crushing cutting board 30 rotating at high speed There are advantages.

The pair of cutting boards 30 having the above-described structure is provided such that the cutting surfaces 33 and 35 are opposed to each other by a coupling member (not shown) coupled to the coupling hole 32. In the present invention, The scale size of the cutting edges 33a and 35a formed on the cutting surfaces 33 and 35 gradually decreases along the discharge direction of the fine powder so that the grinding product can be gradually finely pulverized along the path discharged by the centrifugal force .

To this end, in the present invention, the cutting plate 30 is formed in a disc shape in which the cutting faces 33 and 35 are formed in a ring shape, and the ground fine powder is formed on the cutting faces 33 and 35 by a centrifugal force Like cutting edges 33a and 35a are arranged in the circumferential direction so as to be discharged in the outer diameter direction of the cutting board 30. [

In this embodiment, for example, the cutting board 30 includes a first cutting surface 33 formed on a side closer to the center of the disk and a second cutting surface 35 formed on the outer side of the first cutting surface 33 And a groove 34 formed between the first cutting surface 33 and the second cutting surface 35. As shown in FIG. 2B, the first cutting surface 33 and the second cutting surface 35 The scale size of the cutting edge 33a is larger than the scale size of the cutting edge 35a formed on the second cutting surface 35. [

As described later, when the pulverized material is supplied through the central portion of the one side cutting board 30, the first and second cutting surfaces 33 and 35 formed on the pair of cutting boards 30 The fine powder pulverized by the friction is discharged while being moved outwardly by the centrifugal force through the interval between the scales of the cutting edges 33a and 35a.

At this time, the fine powder that has been pulverized while passing through the first cutting surface 33 is first collected in a space formed between the grooves 34 of the cutting plate 30, and then the scale size of the cutting edge 35b is further reduced Is further finely pulverized while passing through the second cutting surface (35), and then discharged to the inner space of the pulverizing chamber (S) through the end of the cutting plate (30).

Accordingly, the apparatus for producing fine powder according to the present invention can sequentially and densely crush the crushed material while moving between the cutting edges 33a and 35a formed on the cutting board 30, so that even if only one crushing process is performed, Can be crushed to a desired level of dense particle size.

Meanwhile, the fine powder conveying unit includes an intake fan 60 for sucking and conveying the fine powder discharged into the fine pulverizing chamber S through the first conveyance pipes 22a and 22b together with air, And a cyclone collector 50 installed in the middle of the first conveyance pipes 22a and 22b for separating and collecting the fine powder conveyed together with the air.

At this time, one end of the first conveyance pipe 22a or 22b is connected to the upper surface of the pulverizing chamber S, and the other end is connected to the cyclone collector 50, 1 conveying pipe 22a and a rear first conveying pipe 22b connected at one end to the cyclone collector 50 and at the other end to the suction port of the suction fan 60 .

When the suction fan 60 operates to suck air through the other end of the rear first transfer pipe 22b by the above-described structure, the suction end of the front first transfer pipe 22a, The fine powder discharged into the inner space of the fine grinding chamber S is transferred through the front first transfer pipe 22a.

As described above, most of the fine powder transferred through the front first transfer pipe 22a is collected in the cyclone dust collector by the load, and as a result, the dust contained in the fine powder is transferred to the rear first transfer pipe 22b, Only components that are not industrially usable, such as dust or dust, flow.

Accordingly, the fine powder transfer unit 3 according to the present invention is further configured to include a dust collector 100 for collecting dust or dust flowing through the rear first transfer pipe 22b, Is connected to the outlet of the suction fan (60) by a pipe (62).

At this time, the dust collector 100 may be configured by any one of known dust collectors using a dust collecting method within a range of collecting dust or dust.

In addition, a first cooling pipe (not shown) may be further provided at one side of the front first transfer pipe 22a, through which a fluid for cooling air and fine powder flows, (Water-cooled) such as water or a refrigerant or a gas (air-cooled) such as air.

At this time, the first conveyance pipes 22a and 22b and the second conveyance pipe 62 may be made of a stainless steel material having excellent heat resistance and corrosion resistance, for example, and the second cooling pipe may be made of a material such as a copper pipe &Lt; / RTI >

The second cooling pipe may be configured to be wound on the inner surface or the outer surface of the first conveyance pipe 22a or may be configured to be embedded in the tubular body of the first conveyance pipe 22a in the form of a double pipe if necessary .

The cyclone collector 50 is connected to an air lock motor 70 to prevent fine powder collected by the first conveyance pipes 22a and 22b from being accumulated by the introduction of humid air, And further a vibration screen 80 for sorting the collected fine powder according to the particle size may be further provided.

At this time, the air lock motor 70 and the vibration screen 80 can be preferably configured using any one of known technologies and products within the range of performing the same function.

In this embodiment, as an example, the scale size of the vibration screen is composed of 50 meshes and 100 meshes, respectively.

1: hopper part 2: fine grinding part
3: fine powder feed part 30: cutting plate
50: Cyclone collector 60: Intake fan
100: Dust collector

Claims

A hopper part for feeding the pulverized material;
A pulverization unit for pulverizing the supplied pulverized material to produce a fine powder; And
And a fine powder transferring unit for transferring and collecting the fine powder produced in the fine pulverizing unit,
Wherein the fine grinding portion includes a fine grinding chamber for forming a space therein, a pair of cutting plates accommodated in the space so as to face the cutting surfaces so as to face each other and grinding the pulverized material and discharging the pulverized material into fine powder, And a pulverized water supply pipe for supplying a pulverized material discharged from the hopper part between the cutting surfaces,
Wherein the fine powder conveying portion includes an intake fan for sucking and conveying a fine powder discharged into the fine pulverizing chamber through the first conveyance pipe together with air and a fine powder which is installed in the middle of the first conveying pipe and is conveyed together with air, A dust collector connected to the suction fan through a second conveyance pipe for collecting dust or dust contained in the air passed through the first conveyance pipe, and a dust collecting unit for collecting the collected dust in the cyclone collector, And a vibrating screen for classifying the fine powder particles according to particle diameters,
Wherein the cutting plate is constituted by a fixed first cutting plate and a second cutting plate rotatably connected to the driving motor, wherein one of the first cutting plate and the second cutting plate is provided with a hopper portion A through hole is formed in a central portion communicating with the outlet so that the object to be grinded is supplied to the cutting surface, and the other grinding plate on which the through hole is not formed is provided with a through hole A concave portion is formed in a central portion corresponding to a hole,
Wherein each of the cutting planes is formed in a disc shape and has a first and a second cutting surface sequentially formed in a ring shape from the center to the outer periphery thereof and the pulverized fine powder is formed on the first and second cutting surfaces by a centrifugal force Like cutting edge is arranged in the circumferential direction so as to be discharged in the outer diameter direction of the cutting board so as to be gradually finely ground while being discharged along the discharge direction, Is larger than the scale of the cutting edge of the second cutting surface formed on the outer side of the first cutting surface,
Wherein the fine pulverizing part further comprises a first cooling pipe made of a copper pipe material having a good thermal conductivity and disposed on one side of the fine pulverizing chamber, the fluid for cooling the inside of the fine pulverizing chamber flows,
The fine powder conveying portion may further include a second cooling pipe installed at one side of the first conveyance pipe and through which a fluid for cooling the air and fine powder flowing flows, Wherein the first transfer tube is embedded in the tubular body of the first transfer tube in the form of a double tube.

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