JP2007330904A - Wind sorting device and waste plastic sorting system - Google Patents

Abstract

An object of the present invention is to realize a wind power sorting device having a magnetic force sorting function by consolidating the magnetic force sorting function and the wind force sorting function into one device. A configuration in which a magnetic force generating surface is arranged on the waste plastic falling path and the metal foreign matter contained in the pulverized waste plastic is magnetically held and the light matter is selected by blowing the wind from the wind power generator. To do. As a result, the wind power sorting function and the magnetic force sorting function can be integrated into one device. Then, by adopting a wind power sorting device having such a magnetic force sorting function for a waste plastic sorting system, it is possible to reduce the size and cost of the entire system.
[Selection] Figure 1

Description

  The present invention relates to a wind power sorting apparatus that sorts light objects by using a specific gravity difference by blowing wind on crushed plastic, and more particularly, a magnetic force that can also sort out metallic foreign substances contained in crushed plastic. The present invention relates to a wind sorting apparatus having a sorting function and a waste plastic sorting system including the wind sorting apparatus.

  In recent years, with the enforcement of the Containers and Packaging Recycling Law, the effective use of waste plastics discharged from local governments has been studied. One of them is recycling waste plastic as coke oven fuel in coke oven equipment.

  Waste plastics discharged from local governments contain not only plastics of various shapes and materials but also foreign materials such as metals, stones, and glass scraps. As an apparatus for sorting out such foreign matter and plastic, a wind sorting apparatus is known (for example, see Patent Document 1). The configuration of the wind power sorting apparatus described in Patent Document 1 will be briefly described with reference to FIG. 5. An input port 11 and an air discharge port into which a processed material is input into a casing 1 that forms an apparatus exterior body. 12 is formed on the upper side and the lower side of the one side, the exhaust port 13 is formed on the upper side, and the collected foreign matter (heavy material) and plastic (light material) recovery ports 14 and 15 are formed on the bottom. ing.

  In the above-described configuration, when the processed material is input from the input port 11 via the belt conveyor 16, the air from the air discharge port 12 is blown to the processed material that falls in the casing 2, and thereby, a plastic that is a light material. Is blown away and collected in the collection port 15. On the other hand, the foreign matter, which is a heavy material that is not affected by the wind, falls as it is and is collected in the collection port 16. As a result, plastic (light material) is selected from the processed material.

  Here, waste plastics discharged from local governments include plastics of various shapes and materials, but a light plastic film is suitable as a coke oven fuel. Therefore, in order to produce a coke oven fuel, it is necessary to remove not only foreign substances but also heavy plastics.

  Thus, a system that removes foreign substances from waste plastics discharged from local governments and further separates waste plastics into light and heavy materials has been proposed (see, for example, Patent Document 2).

  Briefly explaining the system described in Patent Document 2, the system is a pulverizer for pulverizing plastic general waste discharged from local governments. The configuration includes a vibratory sieve for removing, a magnetic separator for removing magnetic foreign matter by magnetism, and a wind separator for sorting plastics into light and heavy materials.

  However, as described in Patent Document 1, the conventional wind sorting apparatus has only a wind sorting function. Therefore, when trying to construct a system as described in Patent Document 2, It becomes the structure which provided the apparatus independent for each process, such as a sorter, a magnetic sorter, and a vibration sieve. Therefore, the number of devices increases, and additional facilities such as transfer means for connecting the devices are required. As a result, there is a problem that the overall system configuration becomes large and the initial cost and running cost rise.

Japanese Patent No. 3704284 JP 2005-246236 A

  This invention is made | formed based on such a situation, The objective implement | achieves the wind-powered sorting apparatus provided with the magnetic-power-sorting function by consolidating a magnetic-power-sorting function and a wind-powered sorting function in one apparatus. There is.

  Furthermore, an object of the present invention is to reduce the size and cost of the waste plastic sorting system by consolidating the magnetic sorting function and the wind sorting function in one device.

  The wind power sorting device of the present invention is a wind sorting device that sorts light matter by blowing wind from one end side to the other end side of the device housing against crushed waste plastic falling in the device housing. A metal foreign matter contained in the pulverized waste plastic, wherein the pulverized waste plastic is charged, and the magnetic force generating surface is disposed on a dropping path of the pulverized waste plastic in the apparatus housing. A pulverized waste plastic that falls in the apparatus housing, and includes a magnetic generator for magnetically attaching to the magnetic force generation surface and a discharge port that discharges air obliquely upward from one end side of the apparatus housing A wind generator that blows wind on the other end of the apparatus housing, a first recovery port that collects the light matter blown off by the wind, and a bottom end of the apparatus housing , A second recovery port for recovering the heavy residue containing serial metallic foreign substance, characterized by comprising a. In this case, the sorted light matter can be used as a raw material for coke oven fuel, for example.

  The magnetic force generation surface is arranged so that at least a part thereof is in contact with a flow area of the wind discharged from the discharge port of the wind power generator, and a metallic foreign object is magnetized on the magnetic force generation surface It can be set as the structure which blows a wind. At this time, it can be configured to be inclined to an angle corresponding to the discharge inclination angle of the wind directed obliquely upward. The inclination angle of the magnetic force generation surface can be adjusted by an inclination angle adjusting means.

  The magnetic force generator may include a belt conveyor including a drive rotation shaft, an auxiliary rotation shaft, and a rotation belt, and a magnet disposed on the back side of the rotation belt. Furthermore, the magnetic force generator can be disposed above the second recovery port for recovering heavy residue containing the metal foreign matter.

  Further, the wind power sorting device includes a storage unit that stores information in which a setting value of the wind speed discharged from the wind power generator and a setting value of the magnetic force generated by the magnetic force generator are associated with each other, and one of the wind speed and the magnetic force. When the set value is set, a control unit that reads and controls the other set value corresponding to the set value from the information stored in the storage unit can be provided.

  Still further, the wind power sorting device includes a guide plate that regulates a falling path of the crushed waste plastic so that the crushed waste plastic falls at a predetermined position on the magnetic force generation surface. be able to.

  The waste plastic sorting system of the present invention includes a pulverizer for pulverizing waste plastic, a vibration sieving machine for removing foreign substances by pulverizing waste plastic through a sieve, and the above-described wind sorting apparatus.

  According to the wind power sorting device having the magnetic force sorting function of the present invention, a magnetic force generator is provided in the device housing, and a magnetic force generating surface is arranged on the falling path of the crushed waste plastic to the crushed waste plastic. By adopting a configuration in which the contained metallic foreign matter is magnetically held and selected, the functions of the wind power generation device and the magnetic force generation device that are conventionally provided independently can be integrated into one device. By adopting such a wind sorting apparatus for a waste plastic sorting system, it becomes possible to reduce the size and cost of the entire system.

  Furthermore, a state where at least a part of the magnetic force generation surface is in contact with a flow area of the wind discharged from the discharge port of the wind power generator, and metal foreign matter is magnetically attached to the magnetic force generation surface Thus, it is possible to blow off the light material, and it becomes possible to collect the light material that is the object.

  A wind sorting apparatus according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. As shown in FIG. 1, the wind power sorting apparatus includes a casing 2 that forms an apparatus housing (exterior body) formed in a cylindrical body having a diameter of 5 m and a length of 5 m, for example. A wind introduction port 21 is formed on one side surface of the casing 2, and a wind generator 3 such as a fan is connected to the wind introduction port 21. On the other hand, the other end side of the casing 2 is opened as an exhaust port, and an exhaust duct 32 is connected via a screen device 31 for filtering dust. That is, wind is blown out from the wind power generator 3 and exhausted through the exhaust duct 32, thereby forming an air flow from one end side to the other end side in the casing 2.

  In addition, an inlet 22 through which pulverized waste plastic, which is an object to be processed, is input via the vibration sieve 4 is formed at the upper end of the casing 2. On the other hand, the bottom of the casing 2 is formed with a heavy material recovery port 23 for recovering a heavy material (residue) selected from waste plastic and a light material recovery port 24 for recovering a light material. At this time, the heavy material recovery port 23 is formed so as to be positioned at one end side of the casing 2, that is, below the charging port 22, and the light material recovery port 24 is positioned at the other end side of the casing 2. It is formed as follows.

  The wind power generator 3 is configured so that at least the discharge port 33 has a predetermined angle in the diagonally upward direction, for example, an arbitrary angle within a range of 15 to 30 degrees with respect to the horizontal axis, so as to discharge the wind diagonally upward. It is tilted. Further, a guide plate 34 is provided at the tip of the inclined discharge port 33. Moreover, the speed (wind speed) of the wind discharged from the said wind power generator 3 is set to an arbitrary value within a range of, for example, 5 to 50 m / s, preferably 8 to 10 m / s. In this case, although illustration is omitted, the wind speed can be adjusted within the above-described range by using, for example, a drive mechanism having an opening adjustable valve and an inverter function. The exhaust air speed of the exhaust duct 32 is set to an arbitrary value within a range of 2.9 to 17.6 m / s, for example.

  Further, in the wind power sorting apparatus, a magnetic force generator 5 for performing magnetic force sorting is provided at a position above the heavy material recovery port 23. As shown in detail in FIG. 2, the magnetic force generator 5 wraps a rotary belt 53 that is an endless belt between a drive rotary shaft 51 to which a drive mechanism (not shown) is connected and an auxiliary rotary shaft 52. And a magnetic force generating means for generating a magnetic force at an arbitrary value within a range of, for example, 800 to 10000 gauss via a gap on the back surface side of the rotating belt 53 located on the upper surface side. A certain magnet 54 is provided. In this way, the magnetic belt conveyor is configured, and the surface of the rotating belt 53 positioned on the upper surface side is used as the magnetic force generating surface 55. Furthermore, an electric magnet is selected as the magnet 54, and the strength of the magnetic force formed on the magnetic force generating surface 55 is adjusted by changing the power supplied. Note that the upper surface of the rotating belt 53 moves at an arbitrary speed in the range of 1 to 6.8 m / s, for example, in a direction opposite to the direction of the wind discharged from the wind power generator 3. It is set to.

  The magnetic belt conveyor is held in a plate-like holding portion 56 that is open at the top and bottom, and the holding portion 56 is supported by a support member 57 provided at the bottom of the casing 2. The magnetic belt conveyor is disposed to be inclined obliquely upward integrally with the holding portion 56, and the inclination angle thereof is, for example, a wind discharge angle so that the magnetic force generating surface 55 is along the wind discharge direction. Is set to the same angle. The inclination angle is adjusted by an elevating mechanism 58 that is an inclination angle adjusting means connected to the other end side of the holding portion 56. In this case, all or at least a part of the magnetic force generation surface 55 is arranged so as to be in contact with the flow area Q (see FIG. 1) of the wind discharged from the wind power generator 3.

  In the casing 2, two guide plates 25 and 26 are provided for guiding the pulverized waste plastic so that the plastic is dropped and supplied to a predetermined position on the magnetic force generation surface 55. These guide plates 25 and 26 are configured to be able to independently adjust the angle, thereby adjusting the position where the crushed waste plastic falls relative to the magnetic force generating surface 55. Here, with respect to the predetermined position, it is preferable to actually perform a test to set an appropriate position. However, in the present embodiment, for example, the wind length is adjusted with respect to the surface length L of the rotating belt 53 that rotates. The position is set to a ratio of 1: 2 from the downstream of the flow of the.

  Returning to FIG. 1, a gate damper 27, which is a partition member for partitioning the heavy material recovery port 23 and the light material recovery port 24, is provided at the center in the length direction at the bottom of the casing 2. Yes. The gate damper 27 is configured such that the inclination angle can be adjusted within its height and within a range of, for example, 0 ± 30 degrees. By adjusting the height and inclination angle of the gate damper 27, the heavy material side And adjust the boundary on the light object side. Further, a guide plate 28 is provided on the upper surface of the casing 2 so as to be able to adjust the inclination angle thereof for guiding the light material blown off by the wind to the light material recovery port 24.

  Although the illustration is omitted, the above-described wind sorting apparatus includes a control unit having an operation panel. The operator can start and stop each component device and change the set value through the operation panel. In particular, waste plastics discharged from local governments, etc., do not necessarily have a constant ratio of light, heavy, and metallic foreign matter, so the operator manually adjusts the wind speed and magnetic force so that the set values are suitable for these ratios. Is done.

  However, in the present embodiment, the pulverized waste plastic is supplied to the magnetic force generation surface 55, and the wind is blown in a state in which the metal-based foreign matter contained therein is magnetically held. The way of flying light things will change. Therefore, in the future, it is possible to adopt a configuration in which automatic adjustment is performed instead of manual adjustment. That is, a wind speed (set value) that matches the strength of the magnetic force (set value) is set by performing a test in advance, and setting information that associates the two is stored in storage means such as a memory of the control unit. Alternatively, when one of the magnetic forces is set to a certain set value, the CPU of the control unit reads the other corresponding set value from the storage unit, and the wind speed adjusting unit or the magnetic force generator 5 of the wind generator 3 is set to the set value. The magnetic force adjusting means may be controlled.

  Next, the waste plastic processing operation by the wind sorting apparatus having the above-described configuration will be described. First, waste plastics discharged from local governments or the like are discharged as waste plastics separated from other wastes, for example, by sorting in advance by local governments or the like. This waste plastic is coarsely pulverized to a size of, for example, about 75 mm by a pulverizer in a pulverization process, which is a pre-process, and then the foreign matter such as stones and glass debris remaining is selectively removed by the vibration sieve 4.

  Subsequently, the pulverized waste plastic discharged from the vibration sieve 4 is charged into the casing 2 through the charging port 22 at a supply amount of 4500 kg / hr, for example. At this time, the wind power generator 3 and the magnetic force generator 5 are driven according to a predetermined set value determined in advance. In the casing 2, the pulverized waste plastic falls due to its own weight. At that time, as schematically shown in FIG. 3, the dropping direction is regulated by the guide plates 25 and 26, and the magnetized plastic is brought into a predetermined position on the magnetic force generation surface 55. Supplied. A magnetic force is formed on the magnetic force generating surface 55, and thereby, a metallic foreign matter such as a nail or a can contained in the waste plastic is magnetically attached.

  The waste plastic supplied to the magnetic force generation surface 55 in a state where the metallic foreign matter is held by the above-described magnetic adhesion action and the waste plastic just before dropping to the magnetic force generation surface 55 are discharged from the wind power generator 3. A light plastic (light material) such as a film plastic affected by the wind is blown toward the other end of the casing 2.

  On the other hand, heavy objects that are not affected by the wind at the set wind speed (including those that do not jump over the gate damper 27 even if blown off) fall from the one end side of the magnetic belt conveyor through the rotating rotating belt 53 and are heavy. The material is collected in the material collection port 23. At the same time, the metallic foreign matter magnetically attached to the magnetic force generating surface 55 also moves to one end side of the magnetic belt conveyor as the rotating belt 53 rotates. Here, since no magnetic force acts on the end of the magnetic belt conveyor, the metallic foreign matter is released from the magnetic attachment and falls, and is recovered from the heavy material recovery port 23 together with the heavy material. Although not shown in the figure, a recovery container is disposed below the heavy material recovery port 23, and the heavy material and metal foreign matter are stored in the recovery container, and are recovered from the recovery container and finally disposed of. It will be.

  On the other hand, the light material blown away over the gate damper 27 gradually falls due to its own weight and is collected in the light material recovery port 24. In addition, although illustration is abbreviate | omitted, the conveying apparatus is arrange | positioned under the said light-materials collection | recovery opening | mouth 24, and it sends to the fine grinding | pulverization process and shaping | molding process which are subsequent processes. Here, a coke oven fuel is manufactured by performing predetermined | prescribed processes, such as carrying out volume reduction shaping | molding, to a pellet form with respect to a light thing.

  According to the above-described embodiment, the magnetic force generator 5 is provided on the ground path of the pulverized plastic that falls in the casing 2, and the metallic foreign matter is magnetized on the magnetic force generation surface 55 of the magnetic force generator 5. Thus, by adopting a configuration in which the light from the wind power generator 3 is blown to blow off the light objects, the wind power sorting function and the magnetic force sorting function can be integrated into one device. That is, it is possible to realize a wind power sorting device having a magnetic force sorting function. Therefore, if the wind sorting apparatus is adopted in the waste plastic sorting system, it is not necessary to provide a magnetic sorting apparatus separately, and the incidental facilities such as transfer means can be reduced by that amount. Cost can be reduced.

  Furthermore, in this case, all or at least a part of the magnetic force generation surface 55 is disposed so as to be in contact with the flow area of the wind discharged from the wind power generator 3, and the magnetic force generation surface 55 of the magnetic force generator 5 In a state in which metal foreign matter is magnetized, the light from the wind power generator 3 is blown to blow off the light matter, so that the metal foreign matter can be removed only with the wind power sorter and the target light matter is recovered. The effect that it becomes possible to obtain is obtained.

  Here, in the present embodiment, the magnetic force generation surface 55 does not have to be disposed along the wind traveling direction. For example, as illustrated in FIG. 4, the magnetic force generation surface 55 is disposed so as to intersect the wind traveling direction. You may make it do. In this case, a collision position between the wind and the magnetic force generation surface 55 is set on the near side (upstream side of the wind flow) from the position where the waste plastic is dropped, so that the waste plastic has an influence of the wind force on the magnetic force generation surface 55. The receiving distance (L1) is secured. In the wind sorting apparatus, the length of the casing is generally determined in accordance with the discharge angle of the wind at the design stage. Therefore, if the inclination angle of the wind power generator 3 is largely changed, the length of the casing 2 is adapted. No longer. Therefore, in the present embodiment, the inclination angle of the magnetic force generator 5 is changed when the wind traveling direction and the magnetic force generation surface 55 intersect each other, thereby affecting the length of the casing 2. To prevent it.

  In the present invention, it is not always necessary to arrange the magnetic force generator 5 at the position shown in FIG. 1, and for example, a configuration in which the magnetism generator 5 is arranged above the air flow region may be adopted. Specifically, for example, the magnetic force generator 5 is arranged at the position of the guide plate 25 or 26 in FIG. Even in such a case, the purpose of consolidating the magnetic force sorting function and the wind power sorting function into one device can be achieved, and the same effect as in the above-described embodiment can be obtained. .

  Further, in the present invention, the invention is not limited to the belt conveyor type magnetic force generator as described above, but, for example, a drum type magnetic force generator is adopted and set to an arbitrary value within a range of 800 to 3500 gauss, for example. Also good. That is, any magnetic force generator can be applied as long as it has a configuration that can be a magnetic force generating surface. Further, a permanent magnet may be selected in place of the electric magnet, and further, it may be configured by combining an electric magnet and a permanent magnet.

It is a figure showing composition of a wind power sorter by an embodiment of the present invention. It is a figure which shows the structure of the magnetic force generator provided in the said wind power sorter. It is a schematic diagram which shows a mode that waste plastics are sorted with the said wind power sorter. It is a figure which shows embodiment which cross | intersects the advancing direction of a wind and a magnetic force generation surface. It is a figure which shows the structure of the conventional wind power sorter.

Explanation of symbols

2 Casing 21 Wind introduction port 22 Input port 23 Heavy material collection port 24 Light material collection port 3 Wind generator 32 Exhaust duct 5 Magnetic generator 55 Magnetic generation surface

Claims (10)

In the wind power sorting device that sorts light materials by blowing wind from one end side to the other end side of the device housing against the crushed waste plastic falling in the device housing,
A slot into which the pulverized waste plastic is charged;
The magnetic force generation surface is disposed on a dropping path of the pulverized waste plastic in the apparatus housing, and magnetic force generation is performed by magnetically attaching metal-based foreign matters contained in the pulverized waste plastic to the magnetic force generation surface. And
A wind power generator that includes a discharge port that discharges air obliquely upward from one end side of the device housing, and blows wind to crushed waste plastic that falls within the device housing;
A first recovery port that is provided at the bottom of the other end of the device casing and collects light matter blown away by wind;
A wind power sorting device having a magnetic force sorting function, comprising: a second collection port provided at a bottom portion on one end side of the device housing, and collecting a heavy residue containing the metallic foreign matter.   At least a part of the magnetic force generation surface is disposed so as to be in contact with a flow area of the wind discharged from the discharge port of the wind power generator, and the wind is generated in a state where metal foreign matter is magnetically attached to the magnetic force generation surface. The wind power sorting apparatus having a magnetic force sorting function according to claim 1.   3. The wind power sorting apparatus having a magnetic force sorting function according to claim 2, wherein the magnetic force generation surface is inclined at an angle corresponding to the discharge inclination angle of the wind directed obliquely upward.   The wind power sorting device having a magnetic force sorting function according to claim 2 or 3, further comprising tilt angle adjusting means for adjusting the tilt angle of the magnetic force generating surface.   The magnetic force generator includes a belt conveyor provided with a driving rotary shaft, an auxiliary rotary shaft, and a rotary belt, and a magnet disposed on the back side of the rotary belt. A wind power sorting device having the magnetic force sorting function according to any one of 4.   The said magnetic force generator is arrange | positioned in the upper position of the 2nd collection port which collect | recovers the heavy residue containing the said metal-type foreign material, The Claim 1 characterized by the above-mentioned. Wind sorting device with magnetic sorting function. Storage means storing information in which a setting value of wind speed discharged from the wind power generator and a setting value of magnetic force generated by the magnetic force generator are associated with each other;
3. A control unit configured to read out and control the other set value corresponding to the set value of one of wind speed and magnetic force from information stored in the storage unit. A wind power sorting device having the magnetic force sorting function according to claim 6.   The apparatus housing is provided with a guide plate for restricting a fall path of the crushed waste plastic so that the crushed waste plastic falls at a predetermined position on the magnetic force generation surface. A wind power sorting device provided with the magnetic sorting function according to any one of 1 to 7.   The wind sorting apparatus having a magnetic sorting function according to any one of claims 1 to 8, wherein the sorted light matter is used as a raw material for coke oven fuel.   A pulverizer for pulverizing waste plastic, a vibration sieving machine for removing foreign matter by smashing the pulverized waste plastic, and a wind power sorting device according to any one of claims 1 to 9, Waste plastic sorting system.

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