KR20040105044A - a muller - Google Patents

Abstract

PURPOSE: A muller is provided to improve the productivity by continuously supplying the processed material and atomizing the material, to largely lengthen the service life of the present muller by installing a cooling system, and to easily set the crushing degree of the processed material by determining the particle size. CONSTITUTION: The muller includes: a spray unit(10), composed of a feeding line whose one side intakes a high pressure air and other side forms a spray end, and a hollowed pipe line which is distanced from the feeding line; an inputting device(30), arranged in the intermediate position of the feeding line in the connected manner with the latter, and composed of a hopper for feeding the processed material and a feeder; a crushing unit(40), arranged in the spray end of the spray unit(10) so as to spray the high-pressure air and the processed material in the high-pressure spray manner so that they come into collision and are finely crushed. The crushing unit(40) includes: a rectangular upper plate(41); a lower plate(42); and a crushing plate(43).

Description

Multi-stage Crusher {a muller}

The present invention relates to a pulverizer, and more particularly, to a dry pulverizer, in which a workpiece is mixed with high pressure air and blown to a moving path that is refracted by ultra high pressure injection to atomize the workpiece.

Grinding is an easy way to make flour, and mankind has developed grinding methods from before. In principle, the same method is used. In the chemical and mining industries, the purpose of making powder is not to use the powder itself but to increase the efficiency of the next process by using the large specific surface area of the powder, or to mix and recover other useful substances from the rocks. have. This is a common experience in living organisms.

Despite its long history, it consumes large amounts of energy and has a particularly low efficiency, which is a characteristic of the unit operation called grinding, and is one of the most inferior areas of research. On the other hand, the particle size distribution of the powder has a remarkable influence on the development of new materials, so the grinding method for producing the desired particle size distribution will become more important in the future.

As is known, solids have a cohesive energy, and when broken up to create a new surface, the cohesive energy is converted to surface energy.

When the new surface area is increased by pulverization, the surface energy is also increased, and when the two are comparable, further pulverization does not proceed and the so-called pulverization limit is reached.

Through such grinding, various physical property changes are usefully used in various fields.

In other words, the benefits of ultra-atomization include, in the chemical / metal field, surface area increase, reactivity increase, density increase, heat capacity decrease, resolution increase, viscosity change, adhesive force increase, reaction rate increase, and thinning phenomenon.

In the field of pigments / cosmetics, there are increased transparency, improved gloss, improved softness, improved drying speed, improved fresh feel, and permeability to fibers.

In the food / pharmaceutical field, there are advantages such as increased surface area, easy processing, reduced sedimentation, improved admixture, uniform particle size, improved absorbency, and improved permeability.

Examples of the use of ultra-atomization applied according to the above advantages include new material fields such as ceramics and superconducting materials, chemical fields such as petroleum products, pigments, paints, resins and toners, pharmaceutical fields such as cosmetics, injection solutions, sugar oils, proteins, calcium, It is used in food fields such as vitamins, enzymes and food additives.

As described above, a variety of grinders have been devised and used due to various advantages of ultra-fine particles.

Such grinding is mainly a unit operation to obtain finer powder by finely pulverizing a solid raw material by a mechanical method, and is one of the oldest unit operations for mankind such as milling, pigment production, ore processing, As a machine, there are also a wide variety of grinders, and there is a constant need for improvement.

When classifying such mills, it is generally classified into granules (10 cm to 10 cm), heavy chains (cm to 10 m), crushed (cm to 10 m), depending on the particle size of the particles (mainly product powder), They are roughly divided into fine grinding (several mm → several micrometers), and classified according to the force transmission mechanism (reciprocating motion, electric field, type of medium, etc.) and the movement method of the grinder (compression, vibration, etc.).

Compression-

Jaw crusher is a type of rock that enters between the stationary plate moving plate and crushes with strong compressive force. The jaw crusher differs in the case of moving the upper part (raw material input side) and the lower part (product discharge side) of the movable plate. It is a grinder widely used as a primary crusher. The gyro crusher is also crushed by compression, but in this case, the inverted inner cone is eccentrically rotated, so that the raw material rock is crushed. In terms of structure, the raw material is smaller than that of the jaw crusher, but the continuity is high, and the product particle size is easy to control. The cone crusher does not eccentric the inner cone, but is bitten by rotation, and aims at smaller particle size.

High Speed Rotation-

The cutter or hammer is rotated at high speed to be crushed by cutting, shearing or impact. The most common one is the hammer crusher, which is generally installed with a rebound plate on the inner wall of the crusher to repeat the impact repulsion to cover even a small grinding zone. There is a case. In some cases, a screen or grid is installed under the crusher to perform a slight classification.

Known grinding mills

Jaw crusher, Gyratory crusher, Cone crusher, Hammer crusher, cutter mill, shredder, hammer mill, roll crusher, edge runner, stamp mill, disc mill, pin mill, etc.

In addition, the crushed workpieces are recovered through particle size classification according to their characteristics and particle diameters, which are known as wind classification and hydraulic classification, and have various classification devices.

However, when looking at the conventional pulverizer, there is a limit to atomization, there is a problem that the device efficiency is lower than the input energy for atomization, there is a problem that the productivity of the device is difficult to clean the device when switching the workpiece.

In addition, there is a disadvantage that the increase in equipment and deterioration of productivity is accompanied by the separation of the pulverized and processed material to be processed through a separate classifier.

In order to solve the problems of the conventionally known techniques as described above, the present inventor has proposed the grinder of the Republic of Korea Patent Application No. 2003-25055 as shown in Figs.

According to the pre-patent patent, the nozzle unit consists of hollow pipelines (120a, 120b) surrounding the outside spaced apart from the transfer line to form a transfer line by injecting the high pressure air to one side and the nozzle 11 to the other side A grinding unit 22 having a grinding head 22 spaced apart on the same axis line as the nozzle at the tip of the nozzle unit and tapered downward to be hermetically coupled to the pipeline end of the nozzle tip; ), The input device 30 consisting of a hopper and a feeder for supplying the workpiece material in the middle of the transfer line is formed in communication.

According to the prior application as described above, even if the particle size of the workpiece to be put into the mill is relatively large and has a relatively large particle size, it is possible to atomize it, even if the pretreatment through coarse grinding is not precisely maintained before entering the mill. It has the effect of being able to be pulverized, so that the burden on material pretreatment is less, and economic efficiency and high productivity are obtained.In addition, the productivity is improved by being able to atomize while continuously supplying the workpiece. A cooling system that cools to prevent heat generated by collision between materials and friction with transfer lines can be significantly extended in the movement path of the material, and can greatly extend the life of the grinder. Grinder unit of the same structure according to the requirements of fineness Since the particle size is determined by extending the layer, a separate classifier is not required, which greatly reduces the cost of the equipment and ensures high atomization and concentrated particle size, thereby greatly improving the utilization of the material to be processed and the quality when applied to the product. There are various effects such as the advantage that the atomization is possible even in the dry grinding more than wet grinding.

However, the above-mentioned pre-applied invention is suitable for a relatively hard workpiece, and when the workpiece is a soft material or a food to prevent heat during grinding, it is necessary to improve the grinding unit rather than apply it as it is.

The present invention has been made to solve the problems of the conventional pulverizer as described above and to supplement the pre-applied invention has the following object.

The present invention is to provide a multi-stage crusher which is easy to form a crushing unit in a multi-stage structure and suitable for pulverizing a relatively soft material such as food.

The present invention is to provide a multi-stage crusher that can be atomized while continuously supplying the workpiece material to improve productivity.

The present invention is to provide a multi-stage crusher configured to extend the life of the crusher by having a cooling system for cooling to prevent heat generated by the collision between the material or friction with the transfer line in the movement path of the workpiece.

The present invention is to provide a multi-stage crusher configured to easily set the crushing degree of the workpiece to be determined because the particle size is determined by laminating and extending the crushing unit of the same structure in a multi-layer according to the requirements of fineness.

The present invention is to provide a multi-stage pulverizer made to facilitate the pulverization movement of the soft workpiece by additionally applying the injection pressure to each layer of the pulverization unit substantially pulverizing.

The present invention made to achieve the above object is an injection unit consisting of a hollow pipe line surrounding the outside spaced apart from the conveying line to form a conveying line and injecting high pressure air to one side and forming an injection end to the other side, the conveying line In the pulverizer formed by communicating the input device consisting of the hopper and the feeder for supplying the workpiece material in the middle of the, forming a conveying path refracted at the injection end formed on the other end of the injection unit, inlet and outlet at both ends of the conveying path Forming a pulverizing unit formed by forming a pulverizing unit, and forming the pulverizing unit by stacking the pulverizing unit in several layers to form a multi-stage pulverizing unit.

1 is a cross-sectional state diagram showing the configuration of a conventional mill.

FIG. 2 is a cross-sectional state view showing a configuration as a modified embodiment of FIG. 1 invention. FIG.

Figure 3 is a cross-sectional state diagram as an embodiment showing the configuration of the present invention.

Figure 4 is an exploded perspective view showing an extract of the multi-stage grinding unit of the present invention.

5 is a partially cutaway perspective view partially omitted in the combined state of the multi-stage grinding unit of FIG.

6 is a longitudinal cross-sectional view of the coupled state of the multi-stage grinding unit of FIG.

7 is a plan view as a modified embodiment of the multi-stage grinding unit of FIG.

8 is a plan view as another embodiment of the multi-stage grinding unit of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10: injection unit 40: grinding unit

41: upper plate 42: lower plate

43: grinding plate 44: shielding plate

421, 431, 435, 441: through hole 433: refraction feed path

Hereinafter, the present invention will be described in detail through specific examples.

3 to 6, the present invention provides a spray unit comprising a hollow pipeline in which high pressure air is introduced to one side and an injection end is formed on the other side to form a transfer line and is spaced apart from the transfer line. 10) and a hopper and feeder for feeding the workpiece in the middle of the transfer line (30) is formed in communication with the high-pressure injection of high-pressure air and the workpiece to form a fine grinding unit by the impact In the grinder formed in the injection end of the injection unit,

The grinding unit 40 is provided with an inlet by drilling a rectangular upper plate 41 and a through hole 431 that combines a workpiece end and an injection end into which high pressure air is mixed and injected to one side to provide an inlet, and a refraction transfer path from the through hole to the opposite side. 433 is penetrated up and down, and at the opposite end of the refraction transfer path, the tapered and enlarged through-hole 435 is drilled to form the outlet plate and the through-hole 421 contacting the outlet of the plate. The lower plate 42 is formed by inserting the grinding plate 43 between the upper plate 41 and the lower plate 42 and sequentially penetrating through a plurality of bolt holes to press the fastening.

When the crushing unit is formed in multiple stages, a plurality of crushing plates 43 are formed such that the inlet through holes 431 are alternately located in the longitudinal direction and located on opposite sides, and the tapered through holes of the upper and lower narrowings are formed between the respective crushing plates 43. The shielding plate 44 punched through 441 is fitted to each other, and the crushing plate 43 and the shielding plate 44 are repeatedly stacked to form a plurality of stages, and the upper plate 41 and the lower plate 42 at the top and bottom thereof. It is made by sealing hermetically.

In the pulverizing unit formed by stacking in multiple stages, the workpiece and the high pressure air are mixed in the uppermost through hole 431, and the lower stage is formed by combining the injection pipes 46 so as to supplementally supply and supply the high pressure air.

Looking at the operation of the basic embodiment of the present invention made as described above in more detail.

First, the workpiece is crushed to a predetermined particle diameter to open and fill the upper lid of the hopper 310. In this case, the particle diameter of the material to be processed may be a size that can pass through an injection end diameter of about 6 mm, and of course, the injection end diameter may be changed, and grinding of a particle size of 6 mm may be economically provided as a well-known facility. have.

When the workpiece is prepared as described above, while supplying high pressure air, the workpiece to be dropped by the feed motor and the feed screw is pushed and supplied as a screw feeder.

The workpiece to be supplied moves in the direction of the injection end of the injection unit 10 while being mixed in the high pressure air of the transfer line, is injected at a high pressure through the injection end, and moves along the refractive transfer path 433 by this injection pressure. Grinding proceeds while continuously impacting the refracted wall.

In this case, the refractive transfer path 433 is formed by zigzag to have an internal angle of about 120 degrees in consideration of the impact shock and the transfer of the workpiece, thereby forming a crushed by high pressure impact.

In addition, the high pressure air for pulverization is required to be fastened to maintain the airtight by the plate body (upper, lower and or shielding plate) formed above and below the crushing plate 43 to prevent the leakage of pressure, and such airtightness is a known technique. It will not be described in detail as it is possible enough.

The pulverized workpiece is collected through the outlet hole 435 on the opposite side of the inlet to the through hole 441 of the shield plate 44 directly below, and falls downward along the tapered passage downward. 44, while repeating the above process again while being injected by the high-pressure air supplied to the refraction transfer path 433 of the other crushing plate 43 provided in the lower passage to the lower passage by moving downward continuously ( It is discharged through the through hole 421 of 42 to recover.

At this time, since the high-pressure air is supplied to each of the grinding plates 43 separately from the transfer line to which the high-pressure air is supplied, the grinding movement can be smoothly moved to the lowest end even if the refraction transfer path receives air resistance.

As shown in FIG. 7, the cooling grooves 435 are recessed in the upper surface of the shielding plate 44 so as to encircle the outer circumference of the refractive transfer path 433 in the pulverizing plate 43 and both ends of the cooling grooves. It is formed by extending to the adjacent upper and lower, respectively.

The cooling groove 435 is formed to have a continuous path from the top to the bottom and to inject and circulate the refrigerant.

Liquid nitrogen and the like may be used as the refrigerant, and the heat generated during the pulverization by the refrigerant circulation is cooled to increase the pulverization efficiency and to prevent the change of the properties of the pulverized material.

On the other hand, the configuration of the refractive transfer path 433 of the present invention may be implemented as shown in FIG.

This is achieved by forming the refractive transfer path of the "c" shaped refractive transfer path 433a on the crushing plate 43a to form an inlet at one side and an outlet through-hole 435a at the other side, but the material collides. The path portion is made by combining the high rigid plate 437.

In the other embodiment as described above, the action is the same as the above-described basic embodiment, and only the point where the refraction transfer path is formed to be bent by about 90 degrees and the high rigid plate 437 heat-treated to the portion are welded or sandwiched. Therefore, it acts to prevent abrasion due to the impact of the material, and the same is achieved by crushing repeatedly.

Of course, each laminated plate is made to have the same surface size as the state is mutually airtight.

According to the present invention as described in detail above, it is easy to form a grinding unit in a multi-stage structure by laminating flat plates, and the material to be processed has an effect suitable for grinding a relatively soft material such as food, and the like. It can be atomized while supplying continuously, and the productivity is improved, and the cooling system that cools to prevent heat generated by collision between materials and friction with the transfer line can be greatly extended in the movement path of the workpiece. In addition, since the particle size is determined by laminating and extending the pulverizing unit having the same structure in multiple layers according to the requirements of the fineness, the degree of pulverization of the workpiece can be easily set.

In particular, the present invention is a very excellent invention having various effects such as facilitating pulverization movement of the soft workpiece by additionally applying an injection pressure to each layer of the pulverization unit substantially pulverizing.

Claims (5)

Injecting the high pressure air to one side and forming the injection end to the other side to form a transfer line, and the injection unit 10 consisting of a hollow pipeline surrounding the outside spaced apart from the transfer line, and the workpiece to be processed in the middle of the transfer line In the pulverizer formed by forming an injection device (30) consisting of a hopper and a feeder for supplying, forming a pulverizing unit at the injection end of the injection unit to form a pulverized unit by a high-pressure injection of high-pressure air and the workpiece material to form a pulverization by collision, The grinding unit 40 is a rectangular top plate 41, The inlet is formed by drilling a through hole 431 which combines the injection end to which the workpiece and the high pressure air are mixed and injected to one side, and passes through the refractive transfer path 433 up and down from the through hole to the opposite side, and an opposite end of the refractive transfer path. There is a pulverized plate 43 formed by tapping through the enlarged through-hole 435 to form an outlet, The lower plate 42 is formed by drilling a through hole 421 in contact with the outlet of the crushing plate, and the crushing plate 43 is sandwiched between the upper plate 41 and the lower plate 42 to sequentially penetrate through a plurality of bolt holes. Multi-stage grinder, characterized in that. The method of claim 1, wherein the crushing unit is formed a plurality of crushing plate 43 so that the inlet through-holes 431 alternately in the longitudinal direction to be located on the mutually opposite side, tapered through-holes of the ordinary light lower narrowing between each crushing plate 43 The shielding plate 44 punched through 441 is fitted to each other, and the crushing plate 43 and the shielding plate 44 are repeatedly stacked to form a plurality of stages, and the upper plate 41 and the lower plate 42 at the top and bottom thereof. Multi-stage grinder, characterized in that consisting of a multi-stage by sealing. In the crushing unit formed by stacking in multiple stages, the workpiece and the high pressure air are mixed in the through hole 431 of the uppermost crushing plate 43, and the high pressure air is supplementally sprayed into the crushing plate of the following stage. Multi-stage mill, characterized in that the injection pipe 46 is combined to be supplied. The refractive conveying path of the pulverizing plate is formed by the "c" shaped refraction conveying path 433a to form an inlet at one side and an outlet through-hole 435a at the other side, but the material collides to be refracted. A multistage crusher comprising a crush plate (43a) formed by coupling a high rigid plate body (437) to the path portion. A cooling groove 435 is formed in the upper surface of the shielding plate 44 so as to encircle the outer circumference of the refractive transfer path in the pulverizing plate, and both ends of the cooling groove are adjacent to each other. A multistage crusher characterized in that it is formed to extend to the top and bottom to have a continuous path from the top to the bottom to inject and circulate the refrigerant.