JP2002224623A - Inclined conveyor type air separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a separator which can accurately separate a heavy article and a lightweight article and is smaller than heretofore. SOLUTION: The separator has a charging chute 4 which charges a treating object onto a belt conveyor in the same direction as the advancing direction of the belt conveyor, the widthwise inclined belt conveyor 1 for moving the heavy article to the decline side in the width direction of the belt conveyor, and discharging the article from the end in the width direction, and a line or a plurality of lines of annular chain curtains 2 and 3 (The chain curtains of the lines of the uppermost row are short at the rear end side of the belt conveyor.) arranged just above the belt conveyor surface for intercepting the movement of the lightweight article toward the decline side in the width direction of the belt conveyor. The separator has further a nozzle for ejecting air installed obliquely upwards on the lower part of the charging chute tip part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sorting machine for sorting heavy and light materials by utilizing a difference in specific gravity, and particularly to a waste (general waste, building waste, industrial waste, etc.).
The present invention relates to an incline conveyor type sorter combined with wind power used for separating and recovering valuable resources.

[0002]

2. Description of the Related Art Techniques for separating an object to be treated into a heavy object and a light object by utilizing a difference in specific gravity are widely used in various fields of industry. It is often used in waste treatment and in the separation and recovery of valuable resources. For example, it can be reused in recyclable waste (here, waste including beverage containers such as cans, bottles, and PET bottles) In a recycling plant that sorts waste, it is used for separating and recovering heavy objects such as bottles and iron (iron pieces forming part of discarded products) and lightweight objects such as aluminum cans and PET bottles.

[0003] Sorters having such a function of separating heavy and light objects are roughly classified into inclined conveyor type sorters and wind sorters.

[0004] The inclined conveyor type sorting machine is, for example,
As described in JP-A-6-55302, a structure in which a belt conveyor inclined in the width direction and the traveling direction, and a chain curtain which is rotated by a motor in the same direction as the traveling direction of the belt conveyor is arranged on the belt conveyor surface. The belt conveyor is always given a light vibration motion by a vibration device. Heavy objects pass through the chain curtain due to the inclination and vibration of the belt conveyor, and are discharged downward from the widthwise end of the belt conveyor,
The lightweight object is caught by the chain curtain, conveyed by a belt conveyor, and carried out from the end in the traveling direction.

A wind sorter is a sorter that separates a heavy object from a light object by blowing air onto the object to be processed and causing the light object to fly away. An air stream with a wind speed of about 20 m / s can be blown from a large-area outlet (for example, the outlet width: the width of the input chute of the object to be treated, the outlet height: 50 mm) to the object to be treated.
A blower having a large air volume and a small pressure loss is mainly used as an air supply source. Due to the large air volume, large-scale dust collection equipment is required.

[0006] An apparatus capable of sorting with a smaller airflow than the above-mentioned wind sorter has been developed and is disclosed in Japanese Patent Application Laid-Open No. 8-309286. With this device, high-speed air with a wind speed of 80 to 250 m / s can be ejected from nozzles with a diameter of 1 to 5 mm installed at a pitch of 25 to 50 mm. A compressor is used as an air supply source. The feature of this device is that since the air volume required for sorting is very small, dust collection equipment is unnecessary and power consumption is low.

However, these conventional sorters have the following problems. That is, the conventional inclined conveyor type sorter has the following two problems. When a heavy object sliding or rolling from above the belt conveyor in the width direction collides with a light object stuck on the chain curtain, the light object passes through the chain curtain together with the heavy object and is a belt on the heavy material discharge side. Since it is discharged downward from the widthwise end of the conveyor, the recovery rate of light-weight objects is reduced. In order to sort heavy and light objects only by the inclined belt conveyor and the chain curtain, a belt conveyor having a relatively large area is required, and a large installation space is required.

Further, the conventional wind separator has the following two problems. When a heavy object and a light object overlap with each other in the air ejection direction, the light object blocked by the heavy object does not scatter and is collected on the heavy object side. A flat, crushed, light-weight object having a smaller area with respect to the direction of air ejection is less likely to receive wind force, and is collected on the heavy-load side.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the conventional inclined conveyor type sorter and the wind sorter, uses a smaller belt conveyor than the conventional ones, and furthermore, has the advantage of reducing the weight and weight of the objects. It is an object of the present invention to provide a sorting machine capable of improving the sorting accuracy (in particular, increasing the recovery rate of lightweight objects).

[0010]

SUMMARY OF THE INVENTION The gist of the present invention resides in the following incline conveyor type sorter combined with wind power.

A sorting machine for sorting an object to be processed into a heavy object and a light object, comprising: a charging chute for charging the processing object onto a belt conveyor; A belt conveyor having a slope in the width direction for moving a heavy object to the width direction downward slope side of the belt conveyor and discharging from the width direction end thereof, and a belt conveyor having a slope in the width direction just above the belt conveyor surface and substantially in the traveling direction of the belt conveyor. An annular chain curtain arranged in the same direction to block the movement of the light-weight object to the downwardly sloping side in the width direction of the belt conveyor; and A nozzle for ejecting air installed obliquely upward toward the traveling direction of the conveyor is provided, and the charging chute moves the object to be processed in the traveling direction of the belt conveyor. Wind power is installed so that it can be inserted in the same direction, and the chain curtain of the uppermost row of the single-row annular chain curtain or the multiple-row annular chain curtain is shortened at the rear end side of the belt conveyor. Inclined conveyor type sorting machine.

The above-mentioned "object to be treated" is a mixture of a heavy object and a light object, which can be separated on an inclined plate or by wind power by utilizing the difference in specific gravity. It is. If the object to be treated is waste, it is general waste, construction waste, industrial waste, etc., in which case, for example, bottles and iron are `` heavy items '', and aluminum cans, PET bottles, etc. are `` lightweight items ''. Become.

The "downward slope side of the belt conveyor in the width direction" refers to the side of the belt conveyor that slopes down in the width direction (the valley side). Further, the “upward slope side in the width direction of the belt conveyor” to be described later refers to the opposite side (mountain side) having the upward slope.

A "chain curtain" is one in which shields such as brushes and pipes are attached at regular intervals to an endless chain that meshes with a pair of sprockets.

"The top row of chain curtains"
Among the chain curtains arranged in a plurality of rows, it refers to the chain curtain in the row closest to the end in the width direction ascending side of the belt conveyor.

The term "rear end side of the belt conveyor" means an end side of the longitudinal direction of the belt conveyor which is opposite to the traveling direction of the belt conveyor.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a wind-driven inclined conveyor type sorter of the present invention will be described in detail with reference to the drawings.

FIGS. 1A and 1B schematically show an example of the configuration of an inclined conveyer-type sorting machine combined with wind power according to the present invention. FIG. 1A is an elevational view of the whole, and FIG. It is a perspective view of a curtain. FIG. 2A is a schematic plan view of a main part of FIG. 1A, and FIG.
FIG. 3A is a sectional view taken along line AA of FIG.

As shown in FIGS. 1 and 2, the sorting machine of the present invention comprises a charging chute 4 for charging an object to be processed onto a belt conveyor 1, a belt conveyor 1 having a widthwise inclination, and an elongated annular ring. Chain curtains 2 and 3,
Further, it has a nozzle 5 for ejecting air.

The charging chute 4 allows the processing object to be charged in the same direction as the traveling direction of the belt conveyor 1 (indicated by a white arrow in FIGS. 1 and 2), that is, the same as the traveling direction of the belt conveyor 1. It is arranged facing the direction. The attachment position is on the up-slope side in the width direction of the belt conveyor 1 (in FIGS. 1 and 2, on the left side in the traveling direction of the belt conveyor 1), and on the rear end side of the belt conveyor 1. As shown by black arrows in FIG. 2 (a), they are put on the belt conveyor 1 in the same direction as the traveling direction. When the object to be treated is general garbage or the like and includes cullet (broken bottle) or the like which is difficult to sort with this apparatus, as shown in FIG. 1, a vibration sieve for removing the cullet is used. 9 is attached.

In the conventional inclined conveyor type sorting machine, the charging chutes are arranged so that the object to be processed can be loaded toward the downwardly sloping side in the width direction of the belt conveyor, that is, in a direction perpendicular to the traveling direction of the belt conveyor. It had been. When objects to be processed are loaded in the same direction as the traveling direction of the belt conveyor, heavy objects with a higher specific gravity have a greater momentum at the time of introduction and are supplied earlier (toward the traveling direction of the belt conveyor) than lighter objects. This is because it is difficult to separate them smoothly because they overlap with a lightweight object conveyed by a belt conveyor.

However, in the inclining conveyor type sorting machine with wind power of the present invention, as will be described in detail later, when the object to be processed is put on the belt conveyor, air is blown out from the nozzle to blow off the object to be processed and the specific gravity. Because the light weight of the light weight is supplied before the heavy weight (toward the belt conveyor), the heavy weight and the light weight do not overlap with each other, and the light weight is moved closer to the discharge side. Can be supplied and the efficiency of the separation is increased.

As described above, the input chute 4 is disposed in the same direction as the traveling direction of the belt conveyor 1, on the upwardly inclined side in the width direction of the belt conveyor 1, and on the rear end side of the belt conveyor 1. The distance (Z in FIG. 2A) from the widthwise downward inclined side end of the conveyor 1 to the charging direction right end of the charging chute 4 is usually preferably 500 mm or more. When the distance Z is less than 500 mm, the light-weight objects scattered by the wind blow out to the heavy-material discharge side beyond the chain curtain arranged to block the movement of the light-weight objects to the side inclining in the width direction of the belt conveyor. Because it is easy. The upper limit of the distance Z is not particularly limited, but in order to reduce the area of the belt conveyor and make the sorting machine as small as possible, 1500 mm
It is desirable to suppress to.

The belt conveyor 1 is inclined in the width direction (see FIG. 1).
2 and FIG. 2, it is inclined downward from the left side to the right side with respect to the traveling direction of the belt conveyor 1), receives a processing object input from the input chute 4, and slides a heavy object while transporting it. Alternatively, it is configured to be able to be moved to the width direction downward inclined side while being rolled, and to be discharged to the outside of the belt conveyor 1 from its width direction end (heavy load discharge side).
Although not shown in this example, the belt conveyor 1
A knocker (a projection having a different diameter provided on a rotating shaft of a support surface of the belt conveyor 1) is attached to the belt conveyor 1.
Vibration is always applied to the surface. Further, the belt conveyor 1 has an upward inclination angle (elevation angle) β with respect to a horizontal plane in the traveling direction (see FIG. 2B). Each of them has the effect of promoting the movement of the heavy object in the width direction and enhancing the effect of separating the heavy object from the light object.

It is preferable that the inclination angle (depression angle) of the belt conveyor 1 to the downward inclination in the width direction is in the range of 10 to 40 ° with respect to the horizontal plane. The object to be processed on the inclined belt conveyor 1 moves while sliding or rolling toward the downwardly inclined side and hits the chain curtains 2 and 3 to exert a force in the downwardly inclined direction. If it is less than °, the force acting on the chain curtains 2 and 3 is small, so that even heavy objects are blocked from moving by the chain curtains 2 and 3 and are conveyed together with the light objects to the belt conveyor 1 and travel in the traveling direction side (light-weight discharge side ), The amount of the material is increased. If the angle of inclination exceeds 40 °, the force acting on the chain curtains 2 and 3 increases, so that in addition to heavy objects, many light-weight objects also pass through the chain curtains 2 and 3, so that light-weight objects are added together with heavy objects. Is also discharged from the side of the belt conveyor 1 that descends in the width direction (heavy load discharge side).

The inclination (elevation angle β) of the belt conveyor 1 in the traveling direction may not be required. However, the effect of separating a heavy object and a light object can be enhanced by providing an upward slope in the traveling direction. In the case where the upward slope is provided in the traveling direction, the angle is preferably set to 15 ° or less so that the light-weight object can be continuously discharged without staying on the belt conveyor 1.

The length / width ratio (length / width) of the belt conveyor 1 varies depending on the object to be treated, but is generally preferably in the range of 1 to 3. If the length / width is less than 1, the heavy object moves to the widthwise downward slope side of the belt conveyor 1 and is discharged by the belt conveyor 1 to the traveling direction side (light-weight object discharge side) before being discharged from the heavy object discharge side. It will be carried out. On the other hand, if the length / width exceeds 3, the amount of the light-weight material discharged from the end portion (the heavy-weight discharge side) of the belt conveyor 1 in the widthwise downward slope increases, and the recovery rate of the light-weight material decreases. In order to improve the recovery rate, the width of the belt conveyor 1 must be increased, and the belt conveyor 1 having a large area is required, so that it is difficult to reduce the size of the sorting machine.

The traveling speed of the belt conveyor 1 varies depending on the type of the object to be processed, the inclination angle in the width direction (depression angle), the inclination angle in the length direction (elevation angle) of the belt conveyor 1, and other conditions. It is preferably within a range of 50 m / min. If the traveling speed of the belt conveyor 1 is less than 10 m / min, the carrying-out capacity of light-weight objects becomes extremely small,
Before the belt conveyor 1 is carried out from the traveling direction side (light-weight discharge side), the amount of light-weight objects discharged from the widthwise downward inclined side (heavy-load discharge side) of the belt conveyor 1 increases. On the other hand, when the speed exceeds 50 m / min, the amount of heavy objects carried out from the traveling direction side (light-weight object discharging side) of the belt conveyor 1 increases.

The surface of the belt conveyor 1 is generally
It is desirable to keep the coefficient of friction relatively large,
The surface material, surface roughness, and the like may be appropriately determined in consideration of the type of the object to be processed and other conditions. As the surface material, it is usually preferable to use urethane resin or the like.

As shown in FIGS. 1 and 2, on the belt conveyor surface, two rows of elongate annular chain curtains (chain curtains 2, 3) are disposed immediately above the belt conveyor surface.

As described above, the chain curtain is one in which pipes and brushes are attached at regular intervals to an endless chain that meshes with a pair of sprockets. The sprocket (and the endless chain that meshes with it)
As shown in FIG. 1 (a), it is disposed substantially perpendicular to the belt conveyor surface, and in the illustrated example, a brush is attached thereto. As an attachment method, for example,
Put the bunch of brushes between plates of about 100 to 5 mm in length,
A method of fixing this plate to the endless chain is simple. A pipe or the like may be used instead of the brush. For example, a pipe having a length of several tens to several hundreds of mm is hung by a chain or the like, and is easily attached by a method of fixing the chain to an endless chain. It is preferable that the tip of the chain curtain, that is, the tip of the brush or the pipe contacts the belt conveyor surface, or the gap is slightly adjusted to some extent.

The annular chain curtains 2 and 3 can be rotated by driving sprockets. As shown by a broken arrow in FIG. 1B, it is preferable to rotate the belt so that the moving direction on the side contacting the belt conveyor surface is the same as or close to the traveling direction of the belt conveyor 1. By rotating in this way, it becomes easy to convey a lightweight object that is caught by the chain curtain and blocked from passing through the belt conveyor, and furthermore, to recover the lightweight object.

The chain curtains 2, 3 configured as described above prevent the movement of lightweight objects on the downwardly sloping side in the width direction of the belt conveyor. On the other hand, the heavy objects have a large own weight and are not interrupted by the chain curtains 2,3. Pass through 3,
Separation of light and heavy objects is facilitated. The chain curtain is disposed substantially in the same direction as the traveling direction of the belt conveyor. The direction may be the same as the traveling direction of the belt conveyor, or may be a direction slightly inclined to the downwardly inclined side in the width direction of the belt conveyor with respect to that direction. In the example shown in FIG. 2, the chain curtains 2 and 3 are arranged at an angle α with respect to the traveling direction of the belt conveyor 1 (FIG. 2A).
reference).

The arrangement angle α of the chain curtain with respect to the traveling direction of the belt conveyor 1 is preferably in the range of 0 to 20 °. When the arrangement angle α is less than 0 °, that is, when the chain curtain is arranged in a state of being inclined upward in the width direction of the belt conveyor with respect to the traveling direction of the belt conveyor 1, the traveling direction of the belt conveyor 1 , The transport area of the light-weight object is narrowed, so that the light-weight object tends to stay on the belt conveyor 1 and hinders the conveyance of the light-weight object. On the other hand, if the arrangement angle α exceeds 20 °, the object to be processed is likely to move in the traveling direction of the belt conveyor 1, so that heavy objects are also carried out to the traveling direction of the belt conveyor 1 without passing through the chain curtain. You.

The rotation speed of the chain curtain is -10 to +20 m / min with respect to the traveling speed of the belt conveyor 1 described above.
Speed, i.e. up to 10m / min slower,
Preferably, the speed is as high as about 20 m / min. Outside this range, there is a large difference between the transfer speed of the processing target (light-weight object) conveyed by the belt conveyor and the moving speed of the chain curtain. Therefore, when the light-weight object is caught on the chain curtain, a gap is easily generated in the curtain. Lightweight objects can easily pass through the chain curtain.

In the example shown in FIG. 1 and FIG.
Although the chain curtains (chain curtains 2 and 3) are arranged in one row, they may be arranged in one row or three or more rows. The number of rows is different depending on the type of the processing target and other conditions, so it cannot be said unconditionally. Generally, if the number of rows of chain curtains is increased, the sorting accuracy of heavy and light objects is improved.However, considering the operation and maintenance, the smaller number of rows is more advantageous. It may be determined by taking into account the target sorting accuracy and the like.

When the chain curtain is a single row, the length of the chain curtain is shortened. When the chain curtain is a plurality of rows, the length of the chain curtain of the top row is shortened at the rear end side of the belt conveyor. I do. This is to improve the accuracy of sorting heavy and light objects, as will be described in detail later.

As shown in FIG. 1 (a), the wind-driven inclined conveyor type sorter of the present invention further blows air obliquely upward below the tip of the input chute 4 toward the traveling direction of the belt conveyor 1. A nozzle 5 for jetting is provided.

As shown in FIGS. 1 (a) and 1 (b) and FIG. 2 (a), the nozzle is provided to eject a processing object to be thrown from the feeding chute 4 onto the belt conveyor 1 from the nozzle. The affected air is blown to cause the wind to act, and the light-weight objects affected by the air are scattered in the traveling direction of the belt conveyor on the light-weight discharging side as indicated by reference numeral 7a. As shown in FIG. 2, the belt conveyor 1 is dropped to the rear end side.
As shown in (a), this is for shifting the falling position of the light object (reference numeral 7p) and the falling position of the heavy object (reference numeral 8p).
As a result, collision of heavy and light objects on the belt conveyor can be avoided, and the recovery rate of light objects can be improved.

The light-weight object dropped to the drop position 7p is denoted by reference numeral 7b.
As shown in the figure, the belt conveyor moves to the downwardly sloping side in the width direction of the belt conveyor while sliding or rolling, but the movement is interrupted by the chain curtain 2, so that the rotation of the chain curtain 2 and the conveyance by the belt conveyor 1 cooperate. It is conveyed in the traveling direction of the belt conveyor 1. Further, the belt conveyor 1 is less susceptible to the effect of the wind force, and is located at the rear end side of the belt conveyor 1 (for example, an intermediate position between the falling position 7p of the light weight and the falling position 8p of the heavy weight).
The light-weight object dropped on the chain curtain 2 is caught by the chain curtain 3 without being caught by the chain curtain 2 and is prevented from moving toward the downward inclined side, and is conveyed in the traveling direction of the belt conveyor 1 in the same manner as described above. On the other hand, the falling position 8p
As shown by reference numeral 8b, the heavy object slides or rolls on the belt conveyor surface, passes through the chain curtain 3, and moves downward and inclines in the width direction of the belt conveyor.

FIG. 3 is a diagram showing an example in which a slit nozzle is used as a nozzle. A slit nozzle 5a having a slit length substantially equal to the width of the input chute 4 is installed below the tip of the input chute 4 obliquely upward toward the traveling direction of the belt conveyor 1. Air is blown into the slit nozzle 5a from a blower 6 (see FIG. 1A), and is blown at a substantially uniform flow rate in the slit length direction.

It is desirable that the slit length of the slit nozzle is substantially equal to the width of the charging chute 4 as described above. Further, the width of the slit depends on the type of the object to be processed, but is generally preferably 1 to 5 mm.

The nozzle is not limited to the above-mentioned slit nozzle, and a plurality of flat nozzles (slit width of about 1 to 5 mm, slit length of several tens mm) or pipe nozzles (inner diameter of about 5 to 20 mm) may be used. Good.

It is preferable that the flow velocity of the air to be jetted is in the range of 50 to 200 m / s. If it is less than 50 m / s, the scattering distance of lightweight objects is not sufficient, and if it exceeds 200 m / s, the scattering distance of lightweight objects is large, so a belt conveyor with a large area is required, and the air volume is large, so large-scale dust collection It requires equipment and the whole sorter becomes large.

The installation angle of the nozzle for ejecting air is preferably in the range of 30 to 50 ° with respect to the horizontal plane. If the angle is less than 30 ° or exceeds 50 °, the scattering distance of the light-weight object becomes small, the difference between the falling positions of the light-weight object and the heavy-weight object is not clear, and the sorting accuracy of the two decreases.

With the above-described inclined conveyer-type sorting machine of the present invention, a heavy object and a light object are sorted in advance by applying a wind force to the object to be treated. The problem of the above-mentioned conventional inclined conveyor type sorter, in which a heavy object moving from above the slope collides and a light object is discharged together with the heavy object from the widthwise end of the belt conveyor, is eliminated. In addition, since the heavy and light materials are supplied on the belt conveyor in a state of being sorted in advance, the area is smaller than when the heavy and light materials are mixed and thrown onto the belt conveyor and sorted. Processing can be sufficiently performed with a small belt conveyor.

Further, when wind is applied to the object to be treated, even if the light object overlaps with the heavy object or the light object is hardly received by the wind when the object is flat and crushed, it is still sorted on the belt conveyor. Therefore, the problem of separating heavy and light objects only with the conventional wind separator is also eliminated.

The above effect can be further enhanced by adjusting the length of the chain curtain disposed immediately above the belt conveyor surface so as to be shorter at the rear end side of the belt conveyor. That is, by reducing the length of the chain curtain in a single row, and by shortening the length of the chain curtain in the uppermost row of the plurality of rows at the rear end of the belt conveyor, as described below. In addition, it is possible to increase the accuracy of sorting heavy and light objects and improve the recovery rate of light objects.

The extent to which the length of the chain curtain is shortened at the rear end of the belt conveyor depends on the type and shape of the object to be treated, the flow rate of air ejected from the nozzle, and other conditions. It is preferable to adjust the end of the chain curtain (the end on the rear end side of the belt conveyor) so as to be between the falling point of the light-weight object scattered by the jet air and the falling point of the heavy-weight object.

Referring to the drawing (see FIG. 2A), the end of the chain curtain (the end on the rear end side of the belt conveyor) is separated from the rear end of the belt conveyor 1 in the traveling direction of the belt conveyor. X, it is preferable to be located at the position of the distance Y from the end of the belt conveyor 1 in the width direction ascending side to the side of the belt conveyor 1 in the width direction ascending side (heavy load discharging side).

Specifically, the distance X is 700 to 1200 mm, and the distance Y is 100 to 500 mm larger than the throwing chute width (“throwing chute width + 100 mm” to “throwing chute width + 50”).
0 mm "). If the distance X is less than 700mm, heavy objects that catch on the topmost row of chain curtains (or chain curtains if the chain is a single row) will increase, and if it exceeds 1200mm, it will be necessary to sort heavy and light objects. It is necessary to increase the flow velocity of the air, which necessitates an increase in the size of the entire sorting machine. If the distance Y is less than the input chute width + 100 mm, the light objects are spread in the scattering direction when the wind is applied to the object to be processed. If the distance Y exceeds the input chute width + 500 mm, the belt conveyor 1 itself becomes large, and the entire sorting machine becomes large.

In FIG. 2A, if the arrangement position of the chain curtain 2 in the uppermost row is adjusted as described above, heavy objects will be blown out from the nozzles provided below the input chute 4. 8 is not so much affected by
As shown by a, most of them fall before the chain curtain 2 in the uppermost row, that is, fall to the rear end side of the belt conveyor 1, move to the downwardly sloping side in the width direction of the belt conveyor 1, and move to the end portion. From the belt conveyor 1. A heavy object immediately after falling has no momentum to move and is easily blocked by the chain curtain. However, such a concern is eliminated by shortening the rear end of the chain curtain 2 in the uppermost row. On the other hand, as shown by the reference numeral 7a, the light-weight object is blown away from the heavy-weight object, so that the light-weight object is caught by the chain curtain 2 in the uppermost row even if the light-weight object moves down on the belt conveyor 1 to the inclined side. In the illustrated example, since the chain curtain 3 is further provided, even if a lightweight object falls before the chain curtain 2, the movement of the belt conveyor 1 to the widthwise downward inclined side is blocked by the chain curtain 3. Is conveyed by a belt conveyor. As described above, by shortening the chain curtain in the uppermost row (or the chain curtain if the chain curtain is a single row), it is possible to further improve the accuracy of sorting heavy and light objects, It is also advantageous in terms of maintenance and cost. As described above, the feature of the inclined conveyor type separator with wind power according to the present invention is that a conventionally used inclined conveyor type separator is further provided with a nozzle for ejecting air below the tip of the input chute, and the processing is performed. The input chute for the object was mounted in the same direction as the traveling direction of the belt conveyor, and the chain curtain in the top row (or the chain curtain if there was one row) was shortened at the rear end of the belt conveyor. It is in.

By using this sorter, the object to be treated can be separated into heavy and light objects in advance by wind force, and the separated heavy and light objects are shortened at the rear end of the belt conveyor. Sorting is efficiently performed by the curtain, and heavy objects can be discharged from the widthwise end of the belt conveyor to the outside of the belt conveyor, and lightweight objects can be carried out of the belt conveyor from the end in the traveling direction of the belt conveyor. By setting the loading chute mounting direction in the same direction as the traveling direction of the belt conveyor, the processing object (light-weight object) can be scattered by wind power, and the efficiency of sorting heavy and light-weight objects can be further improved.

As described above, according to the inclined conveyer-type sorting machine combined with wind power of the present invention, the installation of the air ejection nozzle, the mounting of the charging chute in the traveling direction of the belt conveyor, and the chain curtain at the rear end side of the belt conveyor. By combining shortening, the accuracy of sorting heavy and light objects can be significantly improved. In addition, since the light-weight objects are sorted in advance by wind power, the area of the belt conveyor can be made smaller than before, and the entire sorting machine can be significantly reduced in size.

FIG. 4 is a diagram showing an example of a processing flow when the sorting machine of the present invention is incorporated in a resource waste treatment plant.

As shown in FIG. 4, inflammables in recyclable waste, irons such as steel cans, and cullets (broken bottles) in the recycle waste placed in the treatment plant are installed at the front stage of the sorting machine of the present invention. After being removed or sorted by the used bag breaker, magnetic separator, and vibrating sieve, heavy and light materials (mainly aluminum cans, PET bottles, etc.) are separated by the separator of the present invention. Separated and collected. The aluminum cans are collected by an aluminum sorter.

[0057]

EXAMPLE A sorting test was carried out on recyclable waste including aluminum cans, plastic bottles and bottles as objects to be treated. In this case, the heavy objects are bottles, and the light objects are aluminum cans and plastic bottles. In addition, in the test, what collected the aluminum can, the PET bottle, and the bottle by the predetermined ratio beforehand was calculated | required, respectively. Also, for comparison,
A similar test was conducted for a conventional inclined conveyor type sorter, a wind sorter, and an inclined conveyor type sorter in which the installation direction of the input chute and the length of the chain curtain are the same as those of the conventional type. went.

The outline of the sorter used is shown below. In addition,
A vibrating sieve is installed in front of each sorter to remove cullet that is difficult to sort, and the vibrating sieve has a width of 600 mm.
Was mounted.

(1) Inclined Conveyor Sorting Machine Combined with Wind (Example of the Present Invention) The sorting machine shown in FIGS. 1 and 2 was used. The loading chute 4 is mounted at the rear end side of the belt conveyor 1 on the upwardly inclined side in the width direction of the belt conveyor 1, and the object to be processed is loaded in the same direction as the traveling direction of the belt conveyor 1.

A nozzle 5 for ejecting air is provided below the tip of the input chute 4 obliquely upward in the traveling direction of the belt conveyor 1. As the nozzle 5, a slit nozzle 5a (see FIG. 3) was used so that the jetted air uniformly hit all of the injected processing objects.

Further, the vertical and horizontal dimensions of the belt conveyor 1 are made smaller than those of the conventionally used belt conveyor, and the chain curtain 2 in the uppermost row of the two rows of chain curtains is placed behind the belt conveyor 1. 1000 at the end
mm. Thus, the light objects scattered by the air ejected from the slit nozzle 5a were caught by the chain curtain 2 or the chain curtain 3 in the uppermost row, and were conveyed by the belt conveyor 1 in the traveling direction. The heavy object was dropped before the chain curtain 2 in the uppermost row, passed through the chain curtain 3, and discharged from the end of the belt conveyor 1 on the side of the belt conveyor 1 that was inclined downward in the width direction.

The conditions of each part of the apparatus are as follows. Nozzle: Slit nozzle (nozzle length 600mm, slit width 1.0mm) Wind speed: 150m / s Air ejection angle: 45 ° Belt conveyor dimensions: width 2m x length 3m Belt conveyor tilt angle: width direction 30 ゜, traveling direction 7 ゜(2) Inclined conveyor type sorting machine (comparative example) FIG. As shown in the figure, the sorting machine has a belt conveyor 10 inclined in the width direction and the traveling direction, and two rows of chain curtains 11 and 12 whose upper surface rotates in the same direction as the belt conveyor 10. The loading chute 4 is attached to the rear end of the belt conveyor 10 at the end of the belt conveyor 10 in the width direction ascending and sloping side.
In a direction perpendicular to the direction of travel. Heavy objects are
It is thrown in from the feeding chute 4 as shown by the reference numeral 8a, passes through the chain curtains 11 and 12 as shown by the reference numeral 8b, and is discharged from the end of the belt conveyer 10 on the downwardly sloping side in the width direction. On the other hand, the light-weight object falls to the same position as the heavy object as shown by reference numeral 7a, and is caught by the chain curtain 11 as shown by reference numeral 7b.
And is carried out from the end in the traveling direction.

The conditions of each part of the sorting machine are as follows. Belt conveyor dimensions: width 3m x length 5m Belt conveyor inclination angle: width direction 20 ゜, traveling direction 7 ゜ (3) Wind separator (comparative example) Fig. 6 shows the configuration of the main parts of this separator. As shown in the figure, when the recyclable garbage to be treated falls from the charging chute 4 through the vibrating sieve 9, the sorting machine blows the air blown obliquely upward, thereby reducing the weight of the aluminum can and The PET bottle is scattered as indicated by reference numeral 7a. The heavy object falls forward as indicated by reference numeral 8a.

The conditions of each part of the apparatus are as follows. Air outlet shape: width 600 mm x height 50 mm Wind speed: 20 m / s Air ejection angle: 45 ° (4) Inclined conveyor type sorter combined with wind power (comparative example) Fig. 7 shows the configuration of the main part of this sorter. As shown in the drawing, the sorting machine includes a charging chute 13, a belt conveyor 10, a nozzle 14 for ejecting air, and two rows of chain curtains 11 and 12, and the mounting position of the charging chute 13 is as described above ( As in the case of the conventionally used inclined conveyor type sorter shown in 2), the belt conveyor 10 is located at the rear end side of the belt conveyor 10 at the widthwise upward inclined side end, and the object to be processed is the belt conveyor 10. In the direction perpendicular to the direction of travel. Also, the shooting chute 13
Has a slanted front end (the rear end side of the belt conveyor 10 can be blown in the same direction as the traveling direction of the belt conveyor 10) so that the air ejected from the nozzles can be blown onto the object to be dropped from the nozzle. long). A pipe nozzle 14 was used as a nozzle in order to bring the tip of the slanted charging chute 13 as close as possible. The chain curtains 11, 12 are kept long as in the prior art. Nozzle: Pipe nozzle (diameter 15mmφ x
9) Wind speed: 150m / s Air ejection angle: 45 ° Belt conveyor dimensions: width 3m x length 5m Belt conveyor inclination angle: width direction 20 ゜, traveling direction 7 ゜ Table 1 shows the sorting test results.

[0065]

[Table 1] As is clear from the results in Table 1, when the wind-driven inclined conveyor type sorter of the present invention is used, the belt conveyor having a smaller area is used as compared with the conventional inclined conveyor type sorter. The sorting accuracy was remarkably high, and a high recovery rate was obtained for both heavy and light materials.
Also, the recovery rate was significantly higher than when using a wind separator. In addition, the same sorter is used for a wind sorter provided with a large number of nozzles having a diameter of 1 to 5 mm and discharging high-speed air, which is disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 8-309286. A test was performed, and the recovery was almost the same as that when the wind separator described in (3) was used.

Further, the sorting machine of the present invention has a high sorting accuracy even when compared with the inclined conveyor-type sorting machine of the comparative example (in which the direction of input of the object to be processed and the chain curtain are the same as those of the conventional inclined conveyor-type sorting machine). Excellent, especially high recovery for lightweight materials. Moreover, the sorting machine of the present invention uses a belt conveyor having a small area, and the advantage of the sorting machine of the present invention is extremely large.

[0067]

According to the present invention, the use of the inclined conveyer with a wind force according to the present invention makes it possible to remarkably improve the accuracy of sorting heavy and light objects, and in particular to increase the recovery rate of light objects. Furthermore, since a smaller belt conveyor can be used than before,
It is possible to reduce the size of the sorting machine and reduce the installation space.

[Brief description of the drawings]

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view schematically showing a configuration of an example of an inclined-conveyer-type sorting machine combined with wind power of the present invention, wherein (a) is an overall elevation view,
(B) is a perspective view of a part (belt conveyor and chain curtain).

FIG. 2 is a view showing a main part of the sorting machine shown in FIG. 1 (a).
2 is a schematic plan view, and FIG. 2B is a cross-sectional view taken along line AA in FIG.

FIG. 3 is a view showing an example of a case where a slit nozzle is used as a nozzle for jetting air in the inclined conveyer-type sorting machine with wind power according to the present invention.

FIG. 4 is a diagram illustrating an example of a processing flow of resource refuse.

FIG. 5 is a schematic plan view showing a configuration of a main part of an inclined conveyor type sorter used for comparison in the example.

FIG. 6 is a schematic elevation view showing a configuration of a main part of a wind separator used for comparison in the example.

FIG. 7 is a schematic plan view showing a configuration of a main part of a tilted conveyer-type sorting machine combined with wind power used for comparison in Examples.

[Explanation of symbols]

 1: Belt conveyor 2, 3: Chain curtain 4: Injection chute 5: Nozzle 5a: Slit nozzle 6: Blower 7a: Lighting object falling trajectory 7b: Lightweight object moving trajectory on belt conveyor 7p: Lightweight object falling position 8a: locus of falling heavy object 8b: locus of moving heavy object on belt conveyor 8p: falling position of heavy object 9: vibrating sieve 10: belt conveyor 11, 12: chain curtain 13: input chute 14: pipe nozzle

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Kunio Ihara 4-5-33 Kitahama, Chuo-ku, Osaka-shi, Osaka Prefecture F-term in Sumitomo Metal Industries, Ltd. (reference) 4D021 FA02 GA02 GA08 GA14 GA16 GA17 GA18 GA23 GA30 GB03 HA10 JA05 JA09 JB02 JB03 KA05 KA06 KB02 KB04 LA01 LA05 LA07 LA20

Claims (1)

[Claims] 1. A sorting machine for sorting an object to be processed into a heavy object and a light object, comprising: a charging chute for charging the processing object onto a belt conveyor; and a processing object for conveying the processing object input from the charging chute. A belt conveyor having a slope in the width direction for moving a heavy object between the belt conveyor in the width direction downward slope and discharging from the width direction end thereof, and a traveling direction of the belt conveyor just above the belt conveyor surface. And an annular chain curtain of one or more rows for blocking the movement of the light-weight object to the widthwise downward slope of the belt conveyor, and further below the tip of the charging chute. A nozzle for ejecting air installed obliquely upward toward the traveling direction of the belt conveyor, and the charging chute moves the object to be processed in the traveling direction of the belt conveyor. It is attached so that it can be inserted in the same direction, and that the chain curtain in the uppermost row of the single-row annular chain curtain or the multiple-row annular chain curtain is shortened at the rear end side of the belt conveyor. The feature is an inclined conveyor type sorting machine combined with wind power.