KR102640168B1 - Pellet Forming System with a Stirring Device and Method for Controlling the Stirring Device - Google Patents

Abstract

The present invention relates to a pellet manufacturing system for producing pellets that can be used as solid fuel or compost from objects such as mushroom culture, food waste, human or livestock waste, sawdust, and wood chips. The present invention includes a boiler using pellets as fuel; an air preheater that heats air through heat exchange between the exhaust gas discharged from the boiler and the air; An internal space is provided into which air heated by the air preheater flows in and becomes an object, and the internal space includes an input section into which the object is introduced, a stirring section into which the object is mixed and dried, and a discharge section into which the object is discharged. a stirring device installed in a drying shed continuously arranged along the longitudinal direction; It provides a pellet manufacturing system including a pellet molding machine that molds pellets using the object dried and stirred in the drying facility. The pellet manufacturing system according to the present invention has the advantage of minimizing the use of separate fossil fuel for drying the object because it dries the object that is the raw material for the pellet by utilizing the exhaust gas of a boiler that uses pellets as solid fuel.

Description

Pellet manufacturing system including a stirring device and method for controlling the stirring device {Pellet Forming System with a Stirring Device and Method for Controlling the Stirring Device}

The present invention relates to a pellet manufacturing system for producing pellets that can be used as solid fuel or compost from objects such as mushroom culture, food waste, human or livestock waste, sawdust, and wood chips. More specifically, it relates to a pellet manufacturing system equipped with a stirring device disposed in a drying area.

As a resource to replace fossil fuels such as oil and coal, solid fuel made from raw materials such as food waste, human waste or livestock excrement, sawdust, and wood chips in the form of pellets is used.

For example, Patent Publication No. 10-2012-0091524 discloses a method of swelling sawdust, pulverizing wood raw materials and wood, and then compression molding them into pellets that can be used as fuel. It is done.

Additionally, not only solid fuel but also compost in the form of pellets is being used. Pellet-type compost is preferred by farmers over powder-type compost because it has the advantage of being easy to mechanically spread and easy to handle.

For example, Patent No. 10-1668454 includes the steps of measuring the moisture content of raw compost and determining the type of compost as powder compost or pellet compost; If the moisture content falls within the moisture content range of a specific compost type, first pulverizing the raw compost and sorting it into a predetermined size; A forward and reverse operation step of transferring in the forward direction if the type of compost is powdered compost, and transferring in the reverse direction if the type of compost is pellet compost; and packaging the compost transported in the forward direction as powder compost, or forming the compost transported in the reverse direction into pellets and then packaging the compost as pellet compost. there is.

Registered Patent No. 10-1442689 Registered Patent No. 10-1444893 Registered Patent No. 10-1668454 Public Patent No. 10-2012-0091524 Public Patent No. 10-2016-0106281 Registered Patent No. 10-1772906

The purpose of the present invention is to provide a pellet manufacturing system in which waste of raw materials is minimized. In addition, the raw materials can be dried using the heat of the exhaust gas discharged from the boiler that uses the produced pellets as fuel and a stirring device placed in the drying area, making it a pellet manufacturing system that does not require the use of separate fossil fuels for drying the raw materials. The purpose is to provide.

Additionally, the object is to provide a method for controlling such a stirring device.

In order to achieve the above-described object, the present invention includes a boiler using pellets as fuel; an air preheater that heats air through heat exchange between the exhaust gas discharged from the boiler and the air; An internal space is provided into which air heated by the air preheater flows in and becomes an object, and the internal space includes an input section into which the object is introduced, a stirring section into which the object is mixed and dried, and a discharge section into which the object is discharged. a stirring device installed in a drying shed continuously arranged along the longitudinal direction; It provides a pellet manufacturing system including a pellet molding machine that molds pellets using the object dried and stirred in the drying facility.

Here, the stirring device includes: a stirrer body installed in the drying cabinet to be movable along the longitudinal and width directions of the drying cabinet; an elevating device installed on the stirrer body; It is fixed to the lifting device, moves up and down according to the operation of the lifting device, and includes a stirring roller equipped with a plurality of rotating stirring paddles.

In addition, the present invention is a method of controlling the above-described stirring device, comprising the steps of a) moving the stirring roller to the most downstream stirring section, and b) rotating the stirring roller and moving it along the width direction, moving the object in the most downstream stirring section to the discharge section, c) moving the stirring roller to the adjacent upstream stirring section, and d) rotating the stirring roller along the width direction. moving the object in the stirring section where the stirring roller is located to the adjacent downstream stirring section; and e) step c) until the object in the most upstream stirring section is moved to the adjacent downstream stirring section. and repeating steps d), f) moving the stirring roller to the input section, and g) rotating the stirring roller and moving it along the width direction to place the object in the input section. A method of controlling a stirring device including the step of moving to the most upstream stirring section is provided.

The pellet manufacturing system according to the present invention has the advantage of minimizing the use of separate fossil fuel for drying the object because it dries the object that is the raw material for the pellet by utilizing the exhaust gas of a boiler that uses pellets as solid fuel.

Figure 1 is a configuration diagram of a pellet manufacturing system according to an embodiment of the present invention.
Figure 2 is a diagram showing a state in which the stirring device according to the present invention is installed in a drying yard.
Figure 3 is a front view of the stirring device of Figure 2.
Figure 4 is a side view of the stirring device of Figure 2.
Figure 5 is a top view of the stirring device of Figure 2.
FIG. 6 is a flowchart for explaining a control method of the stirring device shown in FIG. 2.
Figure 7 is a flowchart of the input step of Figure 6.
FIG. 8 is a diagram for explaining the movement path of the stirring roller in the input step of FIG. 6.
Figure 9 is a flow chart of the stirring step of Figure 6.
Figures 10 and 11 are diagrams for explaining the movement path of the stirring roller in the stirring step of Figure 6.
Figure 12 is a flow chart of the discharge step of Figure 6.
Figure 13 is a flowchart for explaining a method of controlling the movement speed in the width direction of the stirring device.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the attached drawings. The examples introduced below are provided as examples so that the idea of the present invention can be sufficiently conveyed to those skilled in the art. Therefore, the present invention is not limited to the embodiments described below and may be embodied in other forms. And in the drawings, the width, length, thickness, etc. of components may be exaggerated for convenience. Like reference numerals refer to like elements throughout the specification.

Figure 1 is a configuration diagram of a pellet manufacturing system according to an embodiment of the present invention.

As shown in Figure 1, the pellet manufacturing system 1000 according to an embodiment of the present invention includes a boiler 30, an air preheater 40, an exhaust gas treatment device 50, and a stirring device 100. It includes an air supply device (60) and a pellet molding machine (70).

The boiler 30 can use pellets produced in the pellet manufacturing system 1000 according to the present invention as a raw material. Pellets supplied to the boiler 30 may be stored in the silo 35. Pellets stored in the silo 35 may be supplied to the boiler 30 by a pellet transport device 36 such as a screw conveyor.

The boiler 30 includes a combustion chamber 31 in which pellets are burned, and a heat exchanger 33 connected to the combustion chamber 31. The heat exchanger 33 may include a tank in which water is stored and a pipe disposed inside the tank. The fire pipe is a passage through which high-temperature gas discharged from the combustion chamber 31 passes. The water stored in the tank is heated through heat exchange with the high-temperature gas flowing through the pipe. Hot water and steam generated from the boiler 30 can be used for various purposes. For example, when the pellet manufacturing system 1000 uses a mushroom medium as a raw material for pellets, steam generated in the boiler 30 can be used for mushroom sterilization.

The air preheater 40 serves to heat the air through heat exchange between the exhaust gas discharged from the boiler 30 and the air.

The exhaust gas treatment device 50 serves to purify the exhaust gas discharged from the boiler 30. The exhaust gas treatment device 50 may include a cyclone dust collector 51 that removes dust in the exhaust gas using centrifugal force and a bag filter 53 that removes dust using a bag-type filter.

The stirring device 100 is installed in the drying cabinet 1 and serves to stir objects such as mushroom medium loaded in the drying cabinet 1. An air supply pipe (3) is buried on one side of the drying facility (1). The air heated by the air preheater 40 flows into the drying room 1 through the air supply pipe 3. Heated air is used to dry objects. The stirring device 100 will be described in detail later.

The air supply device 60 delivers high temperature air discharged from the air preheater 40 to the air supply pipe 3. The air supply device 60 includes a duct 61 connecting the air preheater 40 and the air supply pipe 3, and a blower 63 installed in the duct 61.

The object discharged after being dried in the drying facility 1 is supplied to the raw material storage device 67 through a transfer device 65 such as a conveyor belt or screw conveyor.

The pellet molding machine 70 is a device that receives the dried object stored in the raw material storage device 67 through a transportation device 69 such as a conveyor belt or screw conveyor, extrudes it, and then cuts it to a certain size to mold pellets. The object input into the pellet molding machine 70 is extruded into the pellet molding hole of the die. The extruded object is cut to a certain size using a cutter installed at the bottom of the die. Pellets discharged from the pellet molding machine 70 are discharged at a high temperature due to friction heat and compression heat.

Pellets discharged from the pellet molding machine 70 in a high temperature state are supplied to the cooling device 75 through a transfer device 73 such as a conveyor belt or screw conveyor.

The pellets cooled in the cooling device 75 may be stored in the silo 79 after passing through a sorter 77 equipped with a screen net, etc. Pellets stored in silo 79 can be transferred to another silo 35, which supplies pellets to the boiler 30.

Hereinafter, the stirring device 100 will be described in more detail with reference to FIGS. 1 to 5.

Figure 2 is a diagram showing the state in which the stirring device according to the present invention is installed in a drying yard, Figure 3 is a front view of the stirring device of Figure 2, Figure 4 is a side view of the stirring device of Figure 2, and Figure 5 is the stirring device of Figure 2. This is a floor plan of the device.

As shown in FIGS. 1 and 2, the drying cabinet 1 provides an internal space capable of accommodating the object M. The object (M) may be livestock waste discharged from a livestock farm or a waste medium used for mushroom cultivation. The drying shed (1) is usually a concrete structure in the form of a rectangular parallelepiped with an open top.

The internal space of the drying cabinet (1) is comprised of an input section (A1) into which the object (M) is introduced along the longitudinal direction of the drying cabinet (1), a stirring section (A2) into which the introduced object (M) is mixed and dried, and a dried object ( Includes the discharge section (A3) where M) is discharged.

As shown in FIG. 1, an air supply pipe 3 is buried in the side of the drying facility 1. The air supply pipe (3) is connected to an external air supply device (60). External air at room temperature is supplied to the bottom of the drying cabinet (1) through the air supply pipe (3). An input conveyor that can be used to input the object (M) may be installed in the input section (A1).

In addition, although not shown, the drying facility 1 is provided with an outlet through which leachate that may occur during drying is discharged.

A conveyor belt 5 or a transfer screw may be installed in the discharge section A3 at the end of the drying facility 1 to transport the dried object M to the outside of the discharge section A3.

A pair of rails 9 for transporting stirring devices are installed in the drying cabinet 1 along the longitudinal direction of the drying cabinet 1. Rails 9 for transporting the stirring device may be installed on both sides of the floor of the drying cabinet 1. Additionally, the rail 9 for transporting the stirring device may be fixed to the upper part of the drying cabinet 1 with a string.

As shown in FIGS. 2 to 5, the stirring device 100 includes a support frame 10 and a stirrer 20 installed on the support frame 10.

The support frame 10 is generally rectangular. Among the four sides 11 and 13 of the support frame 10, the two sides 13 in the width direction of the drying cabinet 1 are so that the support frame 10 can be placed on the rail 9 for transporting the stirring device, It is slightly longer than the gap between the stirring device transport rails (9).

First wheels 15 are installed at the corners of the lower surface of the support frame 10, respectively. The first wheels 15 are mounted on the rail 9 for conveying the stirring device. When the drive motor (not shown) connected to the first wheels 15 operates, the support frame 10 moves in the longitudinal direction of the drying yard 1 along the rail 9 for transporting the stirring device. Rails 17 for transporting the stirrer are installed on the upper surfaces of two sides 13 in the width direction of the drying cabinet 1 of the support frame 10.

The stirrer 20 includes a stirrer body 21, a lifting device 23 installed on the stirrer body 21, and a stirring roller 25 fixed to the lifting device 23.

Second wheels 22 are installed at the corners of the lower surface of the stirrer body 21, respectively. When the drive motor (not shown) connected to the second wheels 22 operates, the stirrer body 21 moves in the width direction of the drying yard 1 along the stirrer transport rail 17. Ultimately, the stirrer body 21 can move in the longitudinal and width directions of the drying cabinet 1.

The lifting device 23 is installed on the stirrer body 21. The lifting device 23 may be a hydraulic device. The lifting device 23 serves to move the stirring roller 25 up and down. When the stirring roller 25 goes down, the stirring paddles 26 are buried inside the object M, and when the stirring roller 25 goes up, the stirring paddles 26 move away from the object M.

The stirring roller 25 includes a rotating shaft and stirring paddles 26 installed on the rotating shaft. Stirring paddles 26 are installed at regular angular intervals. As shown in Figure 3, in this embodiment, a total of 12 stirring paddles 26 are installed at both ends of the rotation axis, 6 at intervals of 30 degrees. The stirring paddle 26 includes an inner portion 27 extending in a radial direction of the rotation axis, and an outer portion 28 extending from the inner portion 27 and making an obtuse angle with the inner portion 27. A plurality of stirring rollers 25 may be installed.

The stirring roller 25 may rotate in the first direction or the second direction. In the present invention, the first direction refers to a counterclockwise direction when looking at the rotation axis of the stirring roller 25 in FIG. 3. The second direction means clockwise. The outer portion 28 of the stirring paddle 26 is biased and bent in a first direction based on the radial direction of the rotation axis.

When the stirring roller 25 rotates in the first direction while the stirring roller 25 is lowered, the stirring paddles 26 lift the drying object M and move the drying object M relatively far. When rotating in the second direction, the stirring paddles 26 dig into the drying object M and push it to move the drying object M a relatively short distance.

Hereinafter, the control method of the above-mentioned stirring device will be described. FIG. 6 is a flowchart for explaining a control method of the stirring device shown in FIG. 2.

As shown in FIG. 6, the method of controlling the stirring device includes an input step (S1) of the object (M), a stirring step (S2) of the object (M), and a discharge step (S3) of the object (M).

The input step (S1) is a step in which the object (M) inputted into the input section (A1) of the drying plant (1) is moved to the most upstream side of the stirring section (A2). For this purpose, space must be provided on the most upstream side of the stirring section (A2), so the object (M) previously stored in the stirring section (A2) of the drying yard (1) is stored in the most downstream stirring section (A2) ( It is sequentially moved to the downstream side starting from M). In the present invention, the upstream side and the downstream side are based on the moving direction of the object (M). That is, of the stirring section A2, the portion close to the input section A1 is the upstream side, and the portion close to the discharge section A3 is the downstream side.

When the input step (S1) is completed, the object (M) stored in the downstream stirring section (A2) is moved to the discharge section (A3), and the newly introduced object (M) into the input section (A1) is moved to the most upstream stirring section ( Moves to A2). And objects M other than the object M in the most downstream stirring section A2 sequentially move to the adjacent downstream stirring section A2. Accordingly, the objects M introduced into the drying yard 1 are arranged in the order of introduction.

FIG. 7 is a flowchart of the input step of FIG. 6, and FIG. 8 is a diagram for explaining the movement path of the stirring roller in the input step of FIG. 6.

The input step (S1) begins with a step (S11) of moving the stirring roller 25 to the most downstream stirring section (A2), as shown in FIGS. 7 and 8.

This step (S11) involves raising the stirring roller 25 by operating the lifting device 23 so that the stirring paddles 26 move away from the object M, and moving the stirrer body 21 to move the stirring roller ( 25) to the most downstream stirring section (A2), and operating the lifting device 23 to lower the stirring roller 25 so that the stirring paddles 26 are buried in the object M. Includes steps.

As described above, it is preferable to move the stirrer body 21 with the stirring roller 25 raised, but in some cases, the stirring roller 25 is moved to the most downstream side with the stirring paddle 26 lowered. It can also be moved to the stirring section (A2).

Next, a step (S12) of moving the object (M) from the stirring section (A2) on the most downstream side to the discharge section (A3) is performed.

This step (S12) includes moving the stirrer body 21 along the width direction of the drying cabinet 1 while rotating the stirrer roller 25. When the stirring roller 25 rotates, the stirring paddles 26 throw or push the object M toward the discharge section A3. When the stirring roller 25 is rotated in the first direction, the stirring paddles 26 lift the object M and throw it toward the discharge section A3. When the stirring roller 25 is rotated in the second direction, the stirring paddles 26 lift the object M. Push it toward the discharge section (A3).

In FIG. 8, the stirring roller 25 is shown to move once in the width direction, but the stirring roller 25 may be moved back and forth several times along the width direction of the drying yard 1.

Next, a step (S13) of moving the stirring roller 25 to the adjacent upstream stirring section A2 is performed. In this step, the stirrer body 21 is moved so that the stirring roller 25 is located in the adjacent upstream stirring section A2.

Next, a step (S14) of moving the object M in the stirring section A2 where the stirring roller 25 is located to the adjacent downstream stirring section A2 is performed.

In this step, while rotating the stirring roller 25 as in step S12, the stirrer body 21 is moved along the width direction of the drying cabinet 1 to move the object M to the downstream stirring section A2. . In this step, the stirrer body 21 is moved in the direction opposite to the direction in step S12 among both width directions of the drying cabinet 1.

Next, steps S13 and S14 are repeated until the object M in the most upstream stirring section A2 is moved to the adjacent downstream stirring section A2 (S15).

Next, a step (S16) of moving the stirring roller 25 to the input section A1 is performed.

Finally, while rotating the stirring roller 25, the stirrer body 21 is moved along the width direction of the drying cabinet 1, thereby moving the object M in the input section A1 to the most upstream stirring section A2. Do it (S17).

If necessary, steps S11 to S17 may be repeated several times.

Next, the stirring step (S2) will be described with reference to FIGS. 9 to 11. Figure 9 is a flowchart of the stirring step of Figure 6, and Figures 10 and 11 are diagrams for explaining the movement path of the stirring roller in the stirring step of Figure 6.

The stirring step (S2) is a step of stirring the objects (M) stored in the stirring sections (A2) while minimizing movement of the objects (M) stored in the stirring sections (A2) to adjacent stirring sections (A2) or other areas.

The stirring step (S2) is largely divided into two steps. One is a step of stirring while moving the stirrer body 21 from the upstream side to the downstream side (first stirring step, S21 to S25, see Figure 9), and the other is a step of stirring while moving the stirrer body 21 from the downstream side to the upstream side. This is a stirring step (second stirring step, S26 to S29, see FIG. 10). Since the object M may unintentionally move along the longitudinal direction of the drying cabinet 1 during the stirring process, in the present invention, the rotation directions of the stirring roller 25 in the first and second stirring steps are opposite to each other. This is done to minimize movement in the longitudinal direction.

As shown in FIGS. 9 and 10, the first stirring step begins with a step (S21) of moving the stirrer body 21 so that the stirring roller 25 is located in the most upstream stirring section A2.

Next, the object (M) in the most upstream stirring section (A2) is stirred (S22).

This step (S22) is a step of moving the stirrer body 21 along the width direction while rotating the stirrer roller 25 in the first or second rotation direction while the stirrer roller 25 is lowered.

Next, the stirring roller 25 is moved to the adjacent downstream stirring section A2 (S23).

And while rotating the stirring roller 25 in the same direction as the rotation direction in step S22, the stirrer body 21 is moved along the width direction to remove the object M in the stirring section A2 where the stirring roller 25 is located. Stir (S24).

Steps S23 and S24 are repeated until the object (M) in the most downstream stirring section (A2) is stirred (S25).

In the second stirring step, as shown in FIGS. 9 and 11, while the stirring roller 25 is lowered, the stirring roller 25 is rotated in the opposite direction to the rotation direction of step S22, and the stirrer body 21 is It begins with a step (S26) of moving along the width direction and returning the object M in the most downstream stirring section A2 to its original position while stirring.

Next, the stirring roller 25 is moved to the adjacent upstream stirring section A2 (S27).

Next, with the stirring roller 25 lowered, the stirring roller 25 is rotated in the opposite direction to the rotation direction in step S22, and the stirrer body 21 is moved along the width direction to move the stirring roller 25 to the position where the stirring roller 25 is located. The object (M) in the stirring section (A2) is returned to its original position while being stirred (S28).

Next, steps S27 and S28 are repeated until the object (M) in the most upstream stirring section (A2) is stirred (S29).

As above, when the first stirring step and the second stirring step are alternately performed, the object M moved by the rotation of the stirring roller 25 in the first stirring step is moved by the stirring roller 25 in the second stirring step. It moves to its original position by rotating in the opposite direction.

Next, the discharge step (S3) will be described with reference to FIG. 12.

The discharge step (S3) is a step of discharging the object (M) of the discharge section (A3) in which drying has been completed to the outside of the drying facility (1).

In the discharge step (S3), the object (M) is pushed to the downstream side of the discharge section (A3) while rotating the stirring roller (25) in the second direction, and the stirring roller (25) is moved to the downstream side of the discharge section (A3) in the first direction. The stirring device 100 is controlled to lift the object (M) that has been pushed out by rotating in the direction and then throw it onto the transfer device.

As shown in FIG. 12, this step (S3) begins with a step (S31) of moving the stirring roller 25 to the upstream discharge section (A3).

Next, while rotating the stirring roller 25 in the second direction, the stirrer body 21 is moved along the width direction to move the object M in the upstream discharge section A3 to the downstream discharge section A3. Do it (S32).

Next, the stirring roller 25 is moved to the downstream discharge section A3 (S33).

And while rotating the stirring roller 25 in the first direction, the stirrer body 21 is moved along the width direction to move the object M in the downstream discharge section A3 onto the transfer device installed in the discharge section A3. Supply (S34). A conveyor belt (5) or a transfer screw can be used as a transfer device.

In addition, the control method of the stirring device according to the present invention can control the moving speed in the width direction of the stirring device in the following manner in all of the above-described input, stirring, and discharge steps.

Figure 13 is a flowchart for explaining a method of controlling the movement speed in the width direction of the stirring device. Referring to FIG. 13, control of the moving speed includes measuring the rotation speed of the stirring roller 25 (S41), and retracting the stirrer body 21 when the rotation speed of the stirring roller 25 is less than the reference rotation speed. (S42), and a step (S43) of adjusting the moving speed in the width direction of the stirrer body 21 to a slower speed compared to the reference speed.

If the rotation speed of the stirring roller 25 falls below the standard rotation speed, the stirring roller 25 can be considered to be overloaded. When the rotation speed of the stirring roller 25 falls below the standard rotation speed, the stirrer body 21 is slightly retracted based on the current direction of movement of the stirrer body 21. Then, the rotation speed is restored to the original rotation speed or higher. In this state, the moving speed in the width direction of the stirrer body 21 is adjusted to a slower speed compared to the reference speed. Then, the stirring roller (25) is not overloaded. When the width direction movement is completed in this state, the width direction movement speed is restored to the normal speed.

The embodiments described above merely describe preferred embodiments of the present invention, and the scope of the present invention is not limited to the described embodiments, and is within the scope of the technical idea and claims of the present invention. Various changes, modifications or substitutions may be possible, and such embodiments should be understood as falling within the scope of the present invention.

1000: Pellet manufacturing system
1: Drying room
5: Conveyor belt
9: Rail for transporting stirring device
A1: Input section
A2: Stirring section
A3: Discharge section
100: stirring device
10: support frame
15: 1st wheel
17: Rail for transporting agitator
20: stirrer
21: stirrer body
22: second wheel
23: Elevating device
25: stirring roller
26: Stirring paddle
30: Boiler
40: air preheater
50: exhaust gas treatment device
60: air supply device
70: Pellet forming machine

Claims (8)

A boiler using pellets as fuel,
an air preheater that heats the air through heat exchange between the exhaust gas discharged from the boiler and the air;
An internal space is provided into which air heated by the air preheater flows in and becomes an object, and the internal space includes an input section into which the object is introduced, a stirring section into which the object is mixed and dried, and a discharge section into which the object is discharged. a stirring device installed in a drying shed continuously arranged along the longitudinal direction;
It includes a pellet molding machine that molds pellets using the object dried and stirred in the drying room,
The stirring device is,
a stirrer body installed in the drying cabinet to be movable along the longitudinal and width directions of the drying cabinet;
An elevating device installed on the stirrer body,
A method of controlling the stirring device of a pellet manufacturing system including a stirring roller fixed to the lifting device, moving up and down according to the operation of the lifting device, and equipped with a plurality of rotating stirring paddles,
It includes an input step and a stirring step,
The input step is,
a) moving the stirring roller to the most downstream stirring section;
b) rotating the stirring roller and moving it along the width direction to move the object in the most downstream stirring section to the discharge section;
c) moving the stirring roller to an adjacent upstream stirring section;
d) rotating the stirring roller and moving it along the width direction to move the object in the stirring section where the stirring roller is located to an adjacent downstream stirring section;
e) repeating steps c) and d) until the object in the most upstream stirring section is moved to the adjacent downstream stirring section;
f) moving the stirring roller to the input section;
g) rotating the stirring roller and moving it along the width direction to move the object in the input section to the most upstream stirring section,
In the stirring step, a first cycle of stirring while moving the stirring roller from upstream to downstream and a second cycle of stirring while moving the stirring roller from downstream to upstream are alternately performed,
The first cycle is,
h) moving the stirring roller to the most upstream stirring section;
i) rotating the stirring roller and moving it along the width direction to stir the object in the most upstream stirring section;
j) moving the stirring roller to an adjacent downstream stirring section;
k) rotating the stirring roller in the same direction as the rotation direction of step i) and moving it along the width direction to stir the object in the stirring section where the stirring roller is located;
l) repeating steps j) and steps k) until the object in the most downstream stirring section is stirred,
The second cycle is,
m) rotating the stirring roller in a direction opposite to the rotation direction of step i) and moving it along the width direction to return the object in the most downstream stirring section to its original position while stirring;
n) moving the stirring roller to an adjacent upstream stirring section;
o) rotating the stirring roller in a direction opposite to the rotation direction of step i) and moving it along the width direction to return the object in the stirring section where the stirring roller is located to its original position while stirring;
p) A method of controlling a stirring device comprising repeating steps n) and steps o) until the object in the most upstream stirring section is stirred. According to paragraph 1,
The stirring paddle is,
an inner portion extending in the radial direction of the rotation axis of the stirring roller;
A control method of a stirring device including an outer part extending from the inner part and forming an obtuse angle with the inner part biased in a first direction based on the radial direction of the rotation axis. According to paragraph 1,
In step a),
a-1) operating the lifting device to raise the stirring roller so that the stirring paddles move away from the object;
a-2) moving the stirring roller to the most downstream stirring section;
a-3) A control method of a stirring device comprising the step of lowering the stirring roller by operating the lifting device so that the stirring paddles are buried in the object. According to paragraph 1,
After step b) above,
moving the stirring roller to the upstream discharge section;
moving the object in the upstream discharge section to the downstream discharge section by rotating the stirring roller in a second direction and moving it along the width direction;
moving the stirring roller to the downstream discharge section;
A method of controlling a stirring device comprising the step of rotating the stirring roller in a first direction and moving it along the width direction to supply the object in the downstream discharge section onto a transfer device installed in the discharge section. According to paragraph 1,
measuring the number of rotations of the stirring roller;
Retracting the stirrer body when the rotation speed of the stirring roller is less than the reference rotation speed;
A method of controlling a stirring device including the step of adjusting the moving speed in the width direction of the stirrer body to a slower speed compared to the reference speed. delete delete delete

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