KR20090030174A - System for separating fixing code for shell having shell pulverizer - Google Patents

Abstract

A system for separating a coated yarn from a shell is provided to collect the coated yarn from the shell efficiently by discharging the classified yarn through an opening of a lower side and separate the shell broken with small pieces by a classifier. A system for separating a coated yarn and a shell comprises the followings: a first classifier(200) separating a bundle of the coated yarns and the shells after receiving the bundle while rotating; a first small cylindrical latticed tub(201) discharging small fragments of the shell; a first big cylindrical latticed tub discharging unclassified shells, the bundle of the coated yarn, and the big fragments of the shell; and a first wire brush performing brush operation.

Description

System for separating fixing code for shell having shell pulverizer

The present invention relates to a coated yarn separation system in a shell and to a coated yarn separation system that allows the coated yarn and the shell to be collected separately.

Usually, about 280,000 tons of oyster shells are produced as processed by-products annually in oyster dredging farms, of which about 180,000 tons are recycled by pottery, sintered fertilizer, etc., but about 100,000 tons of untreated oyster shells are farmed or processed. It is being left around the facility, causing many environmental and hygiene problems.

Oyster shell is composed of 93.68% calcium carbonate, which is used for neutralizing acidic soil fertilizer, poultry feed, food additives (carbonated beverages, water pH adjustment), and industrial products (steel melting point enhancer, desulfurizer, waste water purification, whiteness reinforcement for papermaking). It is developed and produced by more than 10 oyster shell recycling companies, and the annual processing capacity of oyster shell is more than 120,000 tons. However, it is difficult to produce high quality oyster shell recycled products due to the poor removal process of the coated yarn attached to the oyster shell. The current annual throughput is about 40,000 tons.

Oyster shells are always mixed with a coat of oyster shells when harvesting oysters. The most important part of the debris removal system for oyster shell recycling will be the process of removing the coated sand that is attached to the oyster shell.

The process of removing foreign substances from oyster shells that are currently recycled is to remove the relatively long coating yarn mixed with oyster shells by hand crushing the oyster shells by hand.

The biggest problem for oyster shell recyclers in producing oyster shells as acid soil neutralization fertilizers and poultry feed is to remove the coating sand mixed with the crushed oyster shells. Four manpower is used to remove the coating yarn mixed with the oyster shell, and the coating equipment mixed with the oyster shell often causes the operation of the plant to be stopped. Mixing reduces the quality of poultry feed, causing the price to fall. Therefore, in order to promote the recycling of oyster shells, complete removal of the coating material mixed in the oyster shells is essential.

As described above, the oyster farming produces seed seeds by putting natural bean oyster shells or artificial shells into the coated yarn formed by the shell hooks tied at regular intervals to be inhabited at regular intervals so that seed shells can be attached and inhabited. After the seed is harvested, the seeding work is transferred from the farm to the farm to raise it back to success.

As such, in recent years, oyster farming is to inject shells such as natural oyster shells into the seabed so that seed patches (patches) are attached to the shells to be nurtured. Thus, the shell hooks arranged at regular intervals are knotted at regular intervals. The formed coated yarns are bonded to ropes connected to the floats on the surface of the water, and when the seed is produced in the shell, the seed is produced and then transported to a successful farm that is rich in adequate water temperature and food to cultivate it.

In this type of oyster farming work, a ship using a rope that connects them with a coating thread formed by connecting the shells with the seed pads at regular intervals in order to transfer the seed pads produced by the oyster seed farms from the seed farm to the successful farm. It must be pulled up and transported to a suitable place for recycling.

However, in order to grow oysters, shells are hung on coated yarns (polyflohylene or polyvinyl alcohol), and after a certain time, the coated yarns with hanging shells are removed and moved to the ground. It is desirable to separate the shell and use it as a building material or fertilizer, and recycle the coated yarn.

Therefore, a big problem arises that it is not easy to separate the shell firmly fixed to the coated yarn from the coated yarn. In the fishing villages, the coated yarns with the shells fixed are raised to the ground and then buried in the appropriate places, which greatly damages the natural environment. Therefore, a developed machine was developed to prevent such wastes. It is not commercially available due to low performance.

Coated yarn separation system in the shell according to the present invention to achieve the above object,

Shell input hopper for injecting the shell and coated yarn bundle and shell debris is disposed on one side,

A first shell conveying belt for conveying shells and coated yarn bundles and shell debris discharged from the first shell collection receiver under the shell input hopper;

Shear side and shells are coated from the second shell catcher receiving the shell and the coated yarn bundle discharged from the first shell conveying belt is rotated to sort the bundle is primarily to escape the small shell debris The half is a first globule grating having a small grid, and the rear half is composed of a first cod lattice having a cod lattice so that unsorted shells and coated yarn bundles and large shell debris can escape from the globule grid. The first classifier,

The shell and the coated yarn bundle discharged from the cod lattice of the first sorter is a second shell conveying belt for conveying large shell debris,

The shredding housing in which the shells and coating yarn bundles discharged from the second shell conveying belt and the large shredding shreds are finely crushed by the drive motors, and the shell housing is disposed between the two shredding rollers in the shredding housing. A shell crusher having a second shell input hopper for introducing a bundle of coated yarn and large shell debris,

The shells and coated yarns crushed by the shell crusher are re-injected into the shells and coated yarn crushed material from the third shell catcher disposed below the shell crusher, and the crushed and broken shell fragments are broken down while being rotated. It characterized in that it comprises a second classifier consisting of only the second small grid grating having a small grid to exit.

In addition, it is preferable that the first shell further comprises a first shell discharge belt for conveying small shell debris discharged from the first small grid grate of the first sorter.

In addition, it is preferable to further comprise a second shell discharge belt for conveying the small shell debris discharged from the second small grid grate of the second sorter.

In addition, it is preferable that a cylindrical first wire brush for brushing is rotatably supported on the inner wall of the first sorter to restrict foreign matter from being caught in the first globule lattice and the first cod lattice. .

In addition, it is preferable that a cylindrical second wire brush for brushing is rotatably supported on the inner wall of the second sorter so as to restrict foreign matter from being caught in the second globule lattice.

Further, the lattice shape of the first and second small-segment grating cylinders is preferably made of rectangular holes arranged along the longitudinal direction of the cylindrical first and second sorters.

In addition, the first and the second classifier is preferably rotated in a state inclined so that the downstream direction of the shell feeding direction is lower than the upstream direction.

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

1 is an overall perspective view schematically showing the structure of the coating yarn separation system in the shell according to the present invention, Figure 2 is a plan view of the coating yarn separation system of Figure 1, Figure 3 is a coating yarn separation system of Figure 1 4 is a perspective view illustrating a first shell input hopper, a first shell conveying belt, and a first classifier, which are shear sections of the coated yarn separating system of FIG. 1, and FIG. 5 is a coated yarn separating system of FIG. 4. 6 is a front structural view of the front end portion of the coated yarn separation system of FIG. 4, FIG. 7 is a cross-sectional structural view taken along line AA of FIG. 6, and FIG. 8 is a rear view of the coated yarn separation system of FIG. 1. It is a perspective view showing the shell shredder and the second classifier that is the end interval, Figure 9 is a plan view of the rear end of the coating yarn separation system of Figure 8, Figure 10 is a cross-sectional structural view along the line BB of Figure 9, Figure 11 is Figure 8 Coating yarn separation system The rear end of the exploded perspective view.

The coated yarn separation system in the shell according to an embodiment of the present invention, the first shell injection hopper 100 for injecting the shell and the coating yarn bundle and shell debris is disposed on one side.

In addition, the coating yarn separation system in the shell, the first shell transfer for conveying the shell and the coating yarn bundle and shell scrap discharged from the first shell collection receiver 101 of the lower portion of the first shell input hopper 100 A bundle of shells and coated yarns is received from the second shell collection receiver 111 that collects the belt 110 and the shells and the coated yarn bundles discharged from the first shell transfer belt 110, and is classified while rotating the bundles. Firstly, the front side half is the first globule lattice 201 having small globules so that small shell debris escapes. Subsequently, unsorted shells and coating yarn bundles and large shell debris fall out from the globule lattice. The rear end side half portion has a first sorter 200 formed of a first cod grating barrel 203 having a cod grating, and a shell discharged from the first cod grating barrel 203 of the first sorter 200. Ting yarn bundle is a second shell conveying belt 120 for conveying large shell debris, and a double crushing roller (133a) to finely shred the shell and coating yarn bundle and large shell debris discharged from the second shell conveying belt 120 A shell and a coating yarn bundle and a large shell scrap between the shredding housing 133 in which the 133b is rotatably arranged in parallel by the driving motors M, and the double shredding rollers 133a and 133b in the shredding housing 133. A shell crusher 130 having a second shell hopper 131 for injecting the shell and the shells and coating yarns finely crushed by the shell crusher 130 to be disposed below the shell crusher 130. 3 consists of only the second globule grid 141 having a small grid to receive shells and coated yarn crushed material from the shell catch receiver 135 and to rotate the crushed material so as to break out of the shredded shell flakes. It comprises a second classifier 140.

In addition, it comprises a first shell discharge belt 310 for transporting small shell debris discharged from the first globule lattice 201 of the first classifier 200.

In addition, the second shell 140 comprises a second shell discharge belt 320 for conveying the small shell debris discharged from the second globule grid 141 of the second sorter (140).

In addition, a first cylindrical shape for brushing the inner wall of the first classifier 200 in order to restrict the foreign matter caught in the first globule lattice barrel 201 and the first cod lattice barrel 203. The wire brush 410 is rotatably comprised.

In addition, the inner wall of the second classifier 140 is rotatably supported by a second cylindrical wire brush 420 that performs a brushing operation to restrict the foreign matter caught in the second small grid grate 141. Consists of.

In addition, the lattice shape of the first and second small-segment lattice barrel 141 is formed of rectangular holes arranged along the longitudinal direction of the cylindrical first and second sorter 140.

In addition, the first and second classifiers 140 are supported by an axial support roller so as to rotate in a state in which the downstream direction of the shell feeding direction is lower than the upstream direction.

The first and second wire brushes 410 and 420 may include a brush S made of stainless steel and a rotation shaft V to which the brush is fixed.

In addition, the components and the driving motor (M) is floated and supported at a distance from the ground by the support (10, ...).

As a result, finely crushed shells are classified and dropped by the classifier, and the coated yarns having the shells detached are discharged through the downstream openings of the rotating first and second classifiers 140, thereby coating the shells. In the separate collection of the yarn, it is possible to separate the collection with high efficiency.

The present invention, as described above, the oyster shell coating yarn removal apparatus that can remove the foreign matter, such as coated yarn, wood, nails, gloves, stones contained in the oyster shells stored in the yard of the oyster shell recycling company. I want to design. Oyster shells oyster shells stored in the yard of the oyster shell recycler contain small particles of finely crushed particles. This study focuses on the advantages of removing foreign matters such as coated sand, wood, gloves, and stones from oyster shells by using a cylindrical cylinder with a grid of a certain size. Oyster shells and foreign matter are separated by dividing them into smaller oyster shells.

First, the oyster shell containing the foreign material stored in the yard to the first shell hopper 100 is injected. The injected oyster shell is introduced into the first classifier 200 of the oyster shell through the first shell conveyance belt 110.

Here, a grating of size 7mm × 30mm is perforated at the inlet side 1/2 length of the first classifier 200, and a grating of size 40mm × 70mm is perforated at the outlet side 1/2 length, so that the first classifier The oyster shell injected into the inlet side is in contact with the lattice having a size of 7 mm x 30 mm perforated in the length of the inlet side 1/2 due to the rotation of the first classifier 200, and the oyster shell particles smaller than the perforated lattice size are the first shell. The oyster shell is separated through the discharge belt 310, the coating shell is completely removed in the oyster shell separated through the first shell discharge belt 310.

The oyster shell particles smaller than the perforated lattice size were not caught in the lattice sized 7 mm × 30 mm perforated in the length of the inlet side 1/2 of the first classifier 200 while being in contact with the lattice perforated in the outlet side 1/2 length. Or foreign matter including a coating yarn is separated through the second shell conveying belt 120 is moved to the oyster shell crusher 130 side.

Most of the uncoated particles in the lattice 40 mm × 70 mm perforated in the length of the outlet 1/2 of the first classifier 200 are foreign substances having a relatively large size such as long coated yarn, pebbles, wood, gloves, and the like. It is separated to the outlet side of the classifier 200. The role of the first classifier 200 can be reliably separated into three types: oyster shells with good purity that do not contain any foreign substances such as coated yarn and oyster shells containing some foreign substances such as coated yarn, and foreign substances having relatively large size. .

In other words, the oyster shell containing some foreign matter such as coated yarn separated from the first classifier 200 is guided to the shell crusher 130 through the second shell transfer belt 120 for re-crushing. At this time, among the oyster shells containing some foreign materials such as coated yarn separated from the first cod lattice barrel of the first classifier 200, iron pieces such as nails are frequently included, and such iron pieces such as nails are crushers ( Entering 130 may damage the shredder 130. Therefore, the iron pieces such as nails should be removed before entering the shredder 130. In the present application, in order to remove the iron pieces such as nails, the upper roller of the second shell conveying belt 120 was manufactured as a magnet roller and installed on the crusher 130.

As a result, the upper magnet roller of the second shell conveying belt 120 can surely remove iron pieces such as nails included in the oyster shell. Oyster shell containing some foreign matter such as coated yarn separated from the first classifier 200 is guided to the crusher 130 after the iron pieces such as nails are removed by the upper magnet roller of the second shell conveying belt 120 do. The shell crusher 130 is two crushed stone-furnace roller, the crushed stone is formed on the surface of the crushed stone by the shape of the crushed stone parts each other, the oyster shell is broken into small particles, oyster The coating yarn contained in the shell keeps the original shape without cutting it. This is because only the oyster shell particles are crushed small and the coated yarn is kept intact, so that the oyster shell and the coated yarn can be easily separated from the second classifier 140.

In addition, the oyster shell containing some foreign matter such as coated yarn crushed by the crusher 130 enters the inlet side of the second classifier 140. On the cylindrical surface of the second classifier 140, a plurality of second globules gratings having a size of 7 mm x 30 mm are perforated. The oyster shell injected into the inlet side of the second classifier 140 is in contact with a grid of a size of 7 mm × 30 mm perforated on the cylindrical surface due to the rotation of the second classifier 140. A second exit hole is formed from the second globule lattice 141 perforated on the cylindrical surface of the second classifier 140 and separated through the second shell discharge belt 320, the second shell discharge belt 320 is separated. The oyster shell is a state where the coating is completely removed.

On the other hand, foreign matter, such as coating yarn that did not escape to the lattice perforated on the cylindrical surface of the second classifier 140 exits through the outlet side opening of the second classifier 140. Through this process, it is easy to remove the coating material such as coating yarn from the oyster shell containing the coating material such as coating yarn.

Oyster shells oyster shells stored in the yard of the oyster shell recycler contain a large number of small particles shredded first in the oyster shell. Since the oyster shell recycling company removes foreign substances such as coated sand, wood, gloves, and stones from the oyster shell, the existing method of removing the foreign matter such as coated sand is applied to the entire oyster shell. There is no choice but to increase. In the present application, the device was conceived in view of the fact that the oyster shells stored in the yard of the oyster shell recycling company contained a large number of small particles shredded primarily in the park.

In the present application, a cylindrical cylinder having a lattice of a certain size is primarily configured as a separating cylinder, and thus, foreign substances such as coated yarns are included by adopting a method of separating foreign matter larger than the size of the lattice and oyster shell smaller than the size of the lattice. Oyster shell throughput is reduced to less than 50%. The first classifier 200 is designed as a device capable of such a role.

  The function of the first classifier 200 is to first separate more than 50% of the oyster shell from which the foreign material such as coated yarn is completely removed from the oyster shell containing the first foreign matter, and the second is the following oyster shell containing a part of the coating yarn The third one should be able to filter out large foreign bodies, including long coated yarns. To this end, a 7 mm × 30 mm globule lattice is perforated at the front end 1/2 at the inlet side of the first classifier 200, and a cod lattice 40 mm × 70 mm at the rear end 1/2 at the outlet side is perforated. The oyster shell injected into the inlet side of the first classifier 200 is in contact with the grid having a size of 7 mm × 30 mm perforated in the length 1/2 of the inlet side due to the rotation of the first classifier 200 and is smaller than the perforated lattice size. Is separated from the grating groove, and the separated oyster shell is completely removed from foreign matter such as coated yarn.

What was not filtered out of the globule grid of size 7mm × 30mm perforated on the inlet side 1/2 length of the first classifier 200 was drilled while contacting the cod grid of size 40mm × 70mm perforated on the outlet side 1/2 length Oyster shell particles smaller than the lattice size or foreign matter including the coated yarn exits the lattice grooves and is separated by a catchment hopper (H), wherein the separated oyster shell contains foreign matter such as coated yarn, and the second shell It moves toward the oyster shell crusher 130 through the conveying belt (120). In the lattice of 40 mm × 70 mm perforated in the length of the outlet 1/2 of the first classifier 200, most of the particles that are not filtered are long foreign coated yarns, pebbles, wood, gloves, and the like. It is separated to the outlet side of 200). A grating having a size of 7 mm × 30 mm perforated at the length of the inlet side 1/2 of the first classifier 200 may be clogged by foreign matter or oyster shell pieces during the foreign material separation process. In order to prevent such clogging, a stainless steel first wire brush 410 is installed inside the first classifier 200.

The first wire brush 410 rotates by the driving motor M to shake off the lattice hole drilled in the first classifier 200 so as not to be blocked by the oyster shell pieces.

  Therefore, the first classifier 200 can be reliably separated into three types, such as oyster shells having good purity in which foreign substances such as coated yarns are completely removed, oyster shells containing some foreign substances such as coated yarns, and foreign substances having relatively large sizes.

  Iron pieces such as nails should be removed from the oyster shells containing some foreign matter such as coated yarn separated from the first classifier 200. In the present application, the upper roller of the second shell conveying belt 120 is manufactured as a magnet roller and installed on the crusher 130 in order to remove the iron pieces such as nails, and the upper magnet roller is the second shell conveying belt ( 120) Make sure to remove the iron pieces, such as nails, included in the oyster shell that is transferred to 120.

The oyster shells that are conveyed to the second shell conveyance belt 120 are crushed again using the crusher 130. The reason for the re-crushing is because the oyster shell contains foreign matter such as coated yarn, so that only the oyster shell is shredded into small particles using the shredder 130, and the coated yarn is kept intact without being broken because the coated yarn is a flexible material.

The shell crusher 130 is composed of a drive motor (M), a housing 133 and a pair of crushing rollers (133a, 133b), and alternately installing a crushing protrusion and a sleeve on each of the crushing rollers (133a, 133b), While the two crushing rollers 133a and 133b are disposed to be engaged with each other, the crushing protrusions provided in one crushing roller 133a and 133b and the sleeves provided in the other crushing rollers 133a and 133b are shaped to taste together. The space between the rollers 133a and 133b was adjusted to adjust the size of the crushed shell. If the crusher 130 has a good performance, the oyster shell is broken into small particles and the coated yarn is kept in a circular shape so that the oyster shell and the coated yarn can be reliably separated from the second classifier 140.

  Oyster shells containing some foreign matter such as coated yarn crushed in the crusher 130 enters the second classifier 140, the function of the second classifier 140 is coated oyster shell from the oyster shell containing foreign matter such as coated yarn It is to separate the high purity oyster shells from which the foreign matters were completely removed. To this end, a grating having a size of 7 mm × 30 mm is perforated on the cylindrical surface of the second classifier 140. Oyster shells injected into the inlet side of the second classifier 140 are in contact with a grid of a size of 7 mm × 30 mm perforated on the cylindrical surface due to the rotation of the second classifier 140, and thus the oyster shell particles smaller than the perforated grid size are formed in the lattice groove. The oyster shell is separated by a catchment hopper (H), and foreign substances such as coated yarn are completely removed. In order to rotate the second classifier 140, a drive motor M and a drive chain may be provided.

In addition, foreign matters, such as coating yarns, which are not filtered out of the lattice having a size of 7 mm × 30 mm perforated on the cylindrical surface of the second classifier 140, come out to the outlet side. A grid having a size of 7 mm × 30 mm perforated on the cylindrical surface of the second classifier 140 may be clogged by foreign matter or oyster shell pieces during the foreign matter separation process. In order to prevent such clogging, a second wire brush 420 made of stainless steel is installed inside the second classifier 140. The second wire brush 420 is rotated by the driving motor (M) to shake off the lattice holes drilled in the second classifier 140 so as not to be blocked by the oyster shell pieces.

  Therefore, in the second classifier 140, it is possible to reliably separate into two types, oyster shells having good purity in which foreign substances such as coated yarns are completely removed, and small amounts of oyster shells having a large amount of foreign substances such as coated yarns. A small amount of oyster shells with large particles containing foreign matters such as coated yarns are manually removed to remove foreign substances such as coated yarns and once again passed through the crusher 130 to break oyster shells with large particles into small particles. There is a manner of separation at 140.

The oyster shell coated yarn removal system developed in the present application is a device for removing the coated yarn mechanically, so no chemicals are used, and no harmful chemicals are generated even during the removal of the coated yarn.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

1 is an overall perspective view schematically showing the structure of a coating yarn separation system in a shell according to the present invention;

2 is a plan view of the coating yarn separation system of FIG.

3 is a front structural view of the coating yarn separation system of FIG.

4 is a perspective view illustrating a first shell input hopper, a first shell conveying belt, and a first classifier, which are shear sections of the coating yarn separation system of FIG. 1;

5 is a front structural diagram of the front end of the coating yarn separation system of FIG.

6 is a plan view of the front end of the coating yarn separation system of FIG.

7 is a cross-sectional structural view taken along the line A-A of FIG.

8 is a perspective view illustrating a shell crusher and a second classifier of the rear end of the coating yarn separation system of FIG. 1;

9 is a plan view of the rear end of the coating yarn separation system of FIG.

10 is a cross-sectional structural view taken along the line B-B of FIG. 9, and

Figure 11 is an exploded perspective view of the rear end of the coating yarn separation system of Figure 8;

<Explanation of symbols for main parts of the drawings>

  110: first shell conveying belt 120: second shell conveying belt

  130: shell shredder 133: housing

  133a, 133b: shredding roller 140: second classifier

  200: first classifier 410: first wire brush

Claims (8)

The front side half is a first globule lattice having small globules and subsequently unsorted from the globule lattice so that the bundle is coated and the bundle is rotated while the bundle is rotated and the small shell debris is discharged. A first classifier for classifying shells and coated yarns, characterized in that the rear end half comprises a first cod lattice having a cod lattice such that the shell and coated yarn bundles and large shell debris escape. The first shell input hopper for injecting the shell and coated yarn bundle and shell scraps is disposed on one side, A first shell conveying belt for conveying shells and coated yarn bundles and shell debris discharged from the first shell collection receiver under the first shell input hopper; The first classifier according to claim 1, wherein the bundle and the coated yarn bundle are received from the second shell catcher collecting the shell and the coated yarn bundle discharged from the first shell conveying belt, and the bundle is sorted while rotating. The front half is a first globule lattice having a small globule lattice so that small shell debris can escape. A first classifier consisting of a first cod grating having a cod grating, The shell and the coated yarn bundle discharged from the cod lattice of the first sorter is a second shell conveying belt for conveying large shell debris, The shredding housing in which the shells and coating yarn bundles discharged from the second shell conveying belt and the large shredding shreds are finely crushed by the drive motors, and the shell housing is disposed between the two shredding rollers in the shredding housing. A shell crusher having a second shell input hopper for introducing a bundle of coated yarn and large shell debris, The shells and coated yarns crushed by the shell crusher are re-injected into the shells and coated yarn crushed material from the third shell catcher disposed below the shell crusher, and the crushed and broken shell fragments are broken down while being rotated. A coated yarn separation system in a shell comprising a second classifier consisting of only a second globule lattice having a small globule grid to exit. The method of claim 2, And a first shell discharge belt for conveying small shell debris discharged from the first globule lattice of the first sorter. The method of claim 2, And a second shell discharging belt for conveying small shell debris discharged from the second globule lattice of the second sorter. The method of claim 2, A shell having a cylindrical first wire brush for performing a brushing operation on the inner wall of the first classifier so as to restrict foreign matter from being caught in the first globule lattice barrel and the first cod lattice barrel. Coated Yarn Separation System The method of claim 2, Separation of the coating yarn in the shell, characterized in that the inner wall of the second sorter is rotatably supported by a cylindrical second wire brush for brushing to regulate the foreign matter caught in the second globule grid system. The method according to any one of claims 2 to 6, The lattice shape of the first and second globule gratings is a rectangular hole arranged in the shell, characterized in that the rectangular holes arranged along the longitudinal direction of the cylindrical first and second classifiers. The method according to any one of claims 2 to 6, And the first and second classifiers are configured to be rotated in an inclined arrangement such that a downstream direction of the shell's conveying direction is lower than an upstream direction.

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