KR101692025B1

KR101692025B1 - Manufacturing method of dual structure pellet

Info

Publication number: KR101692025B1
Application number: KR1020150119436A
Authority: KR
Inventors: 신성순; 권찬성; 인만진; 김동청
Original assignee: 주식회사엔케이지
Priority date: 2015-08-25
Filing date: 2015-08-25
Publication date: 2017-01-05

Abstract

The present invention relates to a method for producing a dual structure pellet, which comprises feeding a first raw material to a first hopper and transferring the first raw material while stirring the first raw material to feed the first raw material to the inside of a mold portion formed in front of the hopper, A first pellet manufacturing step of operating a first cylinder at a position adjacent to the first hopper after being injected into the mold section and applying pressure to the first raw material injected into the mold section to produce a hollow tube type pellet; , A mold part positioned under the first hopper and having a hollow tube-shaped pellet positioned thereon is slid to the front lower side of the second hopper, the second raw material is introduced into the second hopper, and is positioned inside the mold part while stirring to form a hollow tube A second raw material feeding step of feeding the compressed raw material to the inside of the compressed pellet, and a second cylinder located at an adjacent point of the second hopper to operate, thereby applying pressure to the pellet located inside the mold, A second pellet producing step of preparing a pellet of a double structure by filling the inside of the pellet of the pellet with the pellet of the pellet, and a second pellet preparing step, .
The present invention can easily and smoothly produce a pellet of a double structure through two cylinders and a hopper, thereby providing excellent economical efficiency. By using a pellet of a double structure for fuel, the pellet can be completely burned, It is possible to increase the thermal power of pellets by using two types of raw materials having different ignition point and flash point.

Description

[0001] The present invention relates to a dual structure pellet,

The present invention relates to a method of producing a dual structure pellet, and more particularly, to a method of manufacturing a dual structure pellet by manufacturing a pellet having a double structure using two hoppers and cylinders, The present invention relates to a method for producing a dual structure pellet,

Generally, pellets made of various materials are used for fuel, fertilizer or feed according to the use thereof. Since the pellets are made of one material and have only one round bar shape, the effect is limited depending on the use thereof.

Thus, the pellet used for various purposes such as Korean Utility Model Registration No. 20-0318426 can be formed into a multi-structure of a hollow tube type so that various effects can be utilized at the same time, thereby improving the efficiency of the pellet.

However, when the pellets are formed into a plurality of hollow tubes as described above, the inner structure and the outer structure of the pellets are simultaneously passed through a single tube. At the same time, two or more raw materials are not separated as a double tube, So that it can be formed only in the form of a single round bar.

The method for producing a dual structure pellet according to the present invention includes a first raw material feeding step of feeding a first raw material to a first hopper and feeding the first raw material to the inside of a mold part formed in front of the hopper by feeding the first raw material while stirring A primary pellet manufacturing step of manufacturing a pellet in the form of a hollow tube by applying pressure to the first raw material charged into the mold part by operating the first cylinder at a position adjacent to the first hopper after being injected into the inside of the mold part, A mold part having a hollow tube-shaped pellet positioned on the lower side of the hopper is slid to the front lower side of the second hopper, a second raw material is poured into the second hopper, and the pellet is placed in the mold part while being stirred, A second raw material feeding step of injecting the pellets into the inside of the mold part by operating a second cylinder located at an adjacent point of the second hopper to apply pressure to the pellet located inside the mold part, A second pellet manufacturing step of manufacturing a pellet having a double structure by filling the inside of the pellet with the pellet, and a step of finishing the second pellet manufacturing step The double-structure pellets can be manufactured easily and smoothly through two cylinders and the hopper. This makes it economical. By using the pellets of double structure for fuel, the pellets can be completely burned, And to increase the thermal power of pellets by using two kinds of raw materials having different ignition point and flash point.

The first raw material constituting the outer layer in the pellet of the double structure is formed of a material having a low density and a low moisture retention and a relatively low ignition point and a relatively low flash point and the second raw material constituting the inner layer has a low density, It is possible to prevent the penetration of moisture into the inside of the pellet during storage of the pellet, thereby preventing the thermal power of the pellet from being lowered, and by making the flash point of the first and second raw materials different from each other So that the pellets can be completely burned.

The present invention can easily and smoothly produce a pellet of a double structure through two cylinders and a hopper, thereby providing excellent economical efficiency. By using a pellet of a double structure for fuel, the pellet can be completely burned, It is possible to increase the thermal power of pellets by using two types of raw materials having different ignition point and flash point.

The first raw material constituting the outer layer in the pellet of the double structure is formed of a material having a low density and a low moisture retention and a relatively low ignition point and a relatively low flash point and the second raw material constituting the inner layer has a low density, It is possible to prevent the penetration of moisture into the inside of the pellet during storage of the pellet, thereby preventing the thermal power of the pellet from being lowered, and by making the flash point of the first and second raw materials different from each other There is an advantage that the pellets can be completely burned.

In addition, when the pellet having a double structure is manufactured, the inside diameter is set to be 30 to 60% of the outside diameter, so that the efficiency of the pellet can be optimized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing a method for producing a dual structure pellet of the present invention. FIG.
FIG. 2 is a perspective view showing a first raw material input step and a first pellet production step in the method for producing a dual structure pellet of the present invention. FIG.
3 is a perspective view showing a second raw material input step and a second pellet production step in the method for producing a dual structure pellet of the present invention.

In order to accomplish the above object, a method of manufacturing a dual structure pellet according to the present invention will be described.

In order to produce a pellet having a double structure, a first hopper 10a for stirring and conveying the first raw material constituting the outer layer, a second hopper 10b for stirring and conveying the second raw material constituting the inner layer, A first cylinder 20a for applying pressure to the first raw material to form a tube-shaped pellet, and a second cylinder 20b for applying pressure to a second raw material filling the inside of the hollow tube-shaped pellet, And a single mold part 30 located below the first cylinder 20a and the second cylinder 20b and slidable between the two cylinders.

As shown in FIG. 2, the first raw material is fed into the first hopper 10a in order to produce pellets in the form of a hollow tube, which constitutes an outer layer, from pellets having a double structure.

Here, among the pellets having a double structure, the first raw material constituting the outer layer is made of a material having a low density and a low moisture-holding property and a low ignition point and a low flash point.

This is because the first raw material forming the outer layer is formed of a material having a high density and low moisture retention property in order to prevent the moisture from being permeated into the inside of the pellet when the pellet is made into a double structure.

In addition, since the pellets may not be completely burned when the external moisture permeates into the pellets, they are formed of a material having the above-described characteristics.

In addition, it is preferable that the first raw material is formed of a material having a low ignition point and a low flash point so that the flame can be easily emitted even at a low temperature.

This is intended to increase the fire power while reducing the cost of generating the fire required to burn the pellets.

Then, the first hopper 10a is operated and stirred to move to the discharge portion formed in the first hopper 10a.

Then, the first raw material, which is stirred and conveyed in the first hopper 10a, is injected into the inside of the mold part 30 located at a position adjacent to the first hopper 10a.

Here, it is a matter of course that the size of the pellet is determined according to the mold part 30 into which the first raw material is injected. (S10)

As shown in FIG. 2, when the first raw material is charged into the first hopper 10a and stirred and then injected into the mold unit 30, the first cylinder 20a associated with the first hopper 10a The shaft included in the cylinder 20a is slid into the mold part 30 and the pressure is continuously applied to the first raw material filled in the mold part 30. [

Then, the first raw material filled in the mold part 30 by the operation of the first cylinder 20a is made into a pellet in the form of a hollow tube.

Here, when the first raw material is made into a pellet in the form of a hollow tube by the first cylinder 10a, the inner diameter of the pellet is preferably 30 to 60% with respect to the outer diameter.

This is because when the inner diameter of the pellet is less than 30% of the outer diameter, the characteristics of the second raw material constituting the inner layer, which will be described later, can not be properly represented and the effect of the pellet of the double structure can not be exhibited. If it exceeds 60% with respect to the outer diameter, the inner diameter is made to be 30 to 60% of the outer diameter, because the thickness of the outer layer may become thinner and the outer layer may easily break. (S20)

After the first raw material filled in the mold part 30 through the first hopper 10a and the first cylinder 20a is formed into a hollow tube type pellet as described above, 30 are slid to the position where the second cylinder 20b is located so that the mold part 30 is positioned below the second cylinder 20b.

Then, the second raw material is introduced into the second hopper 10b and stirred, while the second raw material is injected into the mold section 30 in which the hollow pellets are located.

In other words, the second raw material fed into the second hopper 10b is also allowed to perform the same operation as the first raw material fed into the first hopper 10a.

In addition, a pellet in the form of a hollow tube is located inside the mold part 30, and the second raw material charged into the second hopper 20b is filled into the hollow pellet-shaped pellet.

Here, when the second raw material is fed into the second hopper 20b, the second raw material constituting the inner layer in the pellet of the double structure is made of a material having a low density and high moisture retention and a high ignition point and a high flash point do.

This is to increase the thermal power of the pellets when the pellets are made in a double structure so that the pellets are completely burned, thereby reducing environmental pollution due to incomplete combustion. (S30)

As shown in FIG. 3, the second raw material is injected into the mold part 30, and the second raw material is filled into the pellets of the hollow tube type, so that the second cylinder 20b is operated to the second raw material A certain pressure is applied.

Then, the hollow tube type pellet is filled with the second raw material, so that the hollow tube type pellet is formed into a double structure pellet having an inner layer and an outer layer. (S40)

Thereafter, the pellet having a double structure is separated from the mold part (30), and the pellet is finished with a double structure such as drying through a drier or cutting or packing to an appropriate size for use through a cutter or the like. (S50).

The pellet of the double structure can be manufactured by the simple process as described above, and the production cost according to the production of the pellet can be reduced and the economical efficiency to the user can be provided.

In addition, by making the density and moisturizing property of the inner layer and the outer layer of the pellet having a double structure different from each other, the pellet firepower of the pellets can be prevented from being lowered, .

The first and second raw materials may have various particle sizes and various materials depending on the purpose of the user.

Also, by producing the double-structure pellets through the two hoppers and the cylinders as described above, it is possible to maintain a high thermal power when used as a fuel, and to use the materials having different ignition point and flash point to minimize incomplete combustion of the pellets, So that environmental pollution due to incomplete combustion can be minimized.

When the pellets prepared as described above are used as fuel, the outer layer of the pellets having a double structure is first burned at a low temperature, and then the temperature of the outer layer is increased to a certain temperature or higher, As the pellets are burnt together, the pellets of the double structure are completely burned, so that it is possible to provide excellent thermal power without using any additional fuel.

In addition, when a pellet having a double structure is formed, an outer layer having a hollow tube shape is manufactured first, and then a pellet is formed by filling the inside of the pellet. Thus, a pellet having a double structure can be produced without a space between the outer layer and the inner layer. Layer and the outer layer can be prevented from being separated, and the pellet with excellent thermal power can be provided.

Although the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have knowledge of.

10a: First hopper
10b: second hopper
20a: first cylinder
20b: second cylinder
30: mold part

Claims

Two hoppers that can be slid while stirring, transporting, and discharging the raw materials; two cylinders formed per hopper with a constant pressure applied to the raw materials discharged from the two hoppers; and two raw materials discharged from the hopper, A method for producing a dual structure pellet using a single mold part, which is made of pellets by a cylinder while being slid,
A first raw material formed of a material having a high density and low moisture retention and having a low ignition point and a flash point is charged into the first hopper and the first raw material is conveyed while stirring to form an outer layer in a pellet of a double structure, A first raw material feeding step (S10) of feeding a first raw material into the inside of a mold part formed in the mold part;
A step (S20) of manufacturing a pellet in the form of a hollow tube by applying pressure to the first raw material injected into the mold section by operating the first cylinder at a position adjacent to the first hopper after being injected into the mold section;
The mold part located at the lower side of the first hopper and having the hollow tube type pellet positioned thereon is slid to the front lower side of the second hopper and the second hopper forms the inner layer at the pellet of the double structure and has a low density, A second raw material input step (S30) of injecting a second raw material formed of a material having a high flash point into the interior of the mold part while stirring and injecting the second raw material into the compressed pellet in the form of a hollow tube;
A second cylinder located at an adjacent point of the second hopper is actuated to pressurize the pellet positioned inside the mold to fill the hollow pellet's pellet to produce a pellet of double structure, (S40), wherein the diameter of the pellet forming the outer layer is between 30 and 60% of the diameter of the pellet forming the outer layer;
A completion step (S50) of separating, drying and finishing the pellet completed in the double structure in the mold part after the secondary pellet production step (S40); &Lt; / RTI &

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