JP2007125477A - Classifier using wind power - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a classifier using wind power efficiently classifying an object to be classified using the wind power, which is the mixture of combustible matter and noncombustible matter with different specific gravity. <P>SOLUTION: The classifier is provided with: a cylindrical classifying part 7 rotated at a given speed is provided; a plurality of raking-up plates 16 raking up the object M to be classified from a lower part toward an upper part by rotating the classifying part 7 in an axial direction in the classifying part 7; a suction pipe 18 sucking lightweight matter ML in the object M; and an impingement plate 17 which is provided above the suction pipe 18 and makes the object M raked up by the raking-up plates 16 impinge thereto when dropping. A suction port 22 sucking lightweight matter ML in the object M into the suction pipe 18 is formed between the impingement plate 17 and suction pipe 18. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, lightly classified materials such as combustible materials (also referred to as “lightweight materials” in this specification and claims) and heavy classified materials such as incombustible materials (this The present invention relates to a wind power sorter that separates a lightweight object and a heavy object from a classification object mixed with "a heavy object" in the specification and claims.

  Conventionally, building waste materials are primarily crushed to about 20 mm or less by a crusher, combustible materials such as paper and nylon are incinerated, and non-combustible materials such as soil and stone are usually used for landfill reclamation. Has been. For example, since the soil excavated from the road cannot be backfilled, it is crushed as described above, and the incombustible material is used for landfill in the landfill.

  However, since such a classified material contains a combustible material and an incombustible material as described above, they must be classified and used for landfill reclamation.

  As this type of conventional technology, for example, by supplying crushed material (classified material) with a transport pipe near the center of a cylindrical rotating drum, and by blowing an air flow from the crushed material supply side of this transport pipe, The relatively light combustible material in the crushed material is blown away from the opening of the transport pipe, and the relatively heavy non-combustible material is dropped near the opening of the transport pipe, and it is scraped up and crushed in this rotating drum. There is one that tries to separate the light weight and the light weight (for example, see Patent Document 1).

As another conventional technique, waste (classified material) is supplied from the input side of the cylindrical body inclined upward from the input side to the discharge side, and is transported while being scraped up in the cylindrical body. In addition to classifying an object, an intermediate weight object, and a light object, there is also one in which paper or the like is discharged by a blower by an air flow flowing from the lower end to the upper end in the cylindrical body (see, for example, Patent Document 2). .
Japanese Patent Laid-Open No. 6-23325 (page 2-3, FIG. 1) Japanese Laid-Open Patent Publication No. 4-322769 (page 2-3, FIG. 1)

  However, in the case of the above-mentioned Patent Documents 1 and 2, by repeatedly sucking or supplying the classification air in the axial direction of the cylindrical body while repeatedly crushing by scraping and dropping the workpiece in the cylinder, the air is supplied. The lightweight object that moves in the axial direction of the cylinder is newly introduced after being separated, because the lightweight object is moved to the discharge side by the air flow and discharged. Thus, it is mixed again with the workpiece to be rotated in the cylindrical body, and repeatedly collides with the newly added workpiece to be mixed, so that the classification efficiency becomes very poor. In other words, since the once separated lightweight object is mixed with the object to be processed again, the same lightweight object is classified many times, and the classification efficiency becomes very poor.

  Further, in these Patent Documents 1 and 2, if the object to be processed is dried, the classification air also serves as a drying air, so that a large amount of drying air is required and the drying time is classified time. Since they are the same, it is difficult to dry them sufficiently.

  Furthermore, in recent years, building waste materials are also being recycled. For example, there is a demand to reuse soil excavated from roads for landfill instead of landfill.

  Therefore, an object of the present invention is to provide an air classifier that can efficiently classify an object to be classified, in which materials having different specific gravities such as combustible materials and incombustible materials are mixed.

  In order to achieve the above object, the present invention provides an air classifier for classifying an object to be classified with wind power, and includes a cylindrical classifying unit that rotates at a predetermined rotational speed, and is provided inside the classifying unit. In the axial direction, by rotating the classifying unit, by providing a plurality of scraping plates to scrape the classifier from the lower part toward the upper part, and a suction pipe for sucking a light classifier in the classifier, Provided on the upper side of the suction pipe is a collision plate that collides when the classification object scraped up by the scraping plate falls, and the light classification in the classification object is provided between the collision plate and the suction pipe. A suction port for sucking objects into the suction pipe is formed. According to such a configuration, the classified object that is scraped and dropped by the rotation of the classification unit collides with the collision plate when it falls and is crushed and the light classified object is discharged from the suction pipe. It is possible to move the light classification separated in the section separately from other classifications, and efficiently classify the classification without mixing the separated light classification with the classification again. Can do. This crushing means to break up a classified object in which a lightweight material such as a combustible material and a heavy material such as an incombustible material are solidified and to separate them.

  In addition, if the suction pipe is provided in substantially the entire length in the axial direction of the classifying section, and a suction port provided between the suction pipe and the collision plate is provided in almost the entire length of the suction pipe, from the upstream side of the classification section Lightly classified objects can be discharged sequentially toward the downstream side for more accurate classification.

  Further, an inclined surface is formed on the collision plate where a classifier that has been scraped and dropped by the scraping plate collides, and the light classifier is sucked into the suction pipe between the lower end of the inclined surface and the suction pipe. If the nozzle-shaped suction port is formed, the light-weighted classification object in the classified material that collides and collides with the inclined surface can be quickly separated from the nozzle-shaped suction port.

  In addition, if a drying unit that rotates in a cylindrical shape is provided on the classification material input side of the classification unit, and a drying air supply unit that supplies dry air to the classification product is provided in the drying unit, a wet classification product is provided. Even so, it can be dried in the drying section and classified in the classification section.

  Further, the drying air supply section is provided with a slit-shaped opening that opens in the axial direction of the drying section, and an overlap section that overlaps in the counter-rotating direction on the inner diameter side while maintaining the opening of the slit-shaped opening. Then, the rotating object to be rotated inside the rotating drying unit is rotated so that it does not fall from the opening, and the drying air supplied from the slit-shaped opening is sufficiently brought into contact with the object to be dried. be able to.

  In addition, the lower surface of the drying unit is formed almost horizontally so that the axial feed of the classification object in the drying unit is slow, and the classification unit is fastened so that the axial feeding of the classification object is accelerated in the classification unit. If the lower surface is inclined downward toward the discharge side, even a wet classification object can be sufficiently dried and efficiently classified.

  In addition, if a control device that controls the number of rotations of the classification unit according to the type of the classification object is provided, the classified object scraped up according to the classification object falls and collides with the collision plate. It is possible to easily make the number of rotations easy to crush.

  The present invention separates a lightweight article from a classified article in which a heavy article and a lightweight article are mixed, such as building waste, and mixes the separated lightweight article into the classified article again by means as described above. Therefore, it is possible to classify the classification object efficiently without any problem.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a wind classifier showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of this wind classifier, and FIG. FIG. 4 is a side view showing an example of the internal structure of the suction pipe of the air classifier. As classified objects in the following embodiments, for example, building waste materials are primarily crushed to about 20 mm or less, etc., and lightweight materials such as paper and nylon mixed in the classified objects An example of classifying heavy materials such as earth and stones and noncombustible materials will be described.

  As shown in FIG. 1, the wind classifier 1 according to the first embodiment is provided with a drying cylindrical body 2 that is a drying section formed in a cylindrical shape on the input side (the right side in the drawing) of the classification object M, On the discharge side (the left side in the figure), a classification cylindrical body 3 is provided as a classification portion formed in a tapered shape whose diameter increases from the input side toward the discharge side. The dry cylindrical body 2 and the classification cylindrical body 3 are connected by a flange 4 and formed into an integral cylindrical body 5. The portion of the dry cylindrical body 2 is also referred to as a drying unit 6, and the portion of the classification cylindrical body 3 is also referred to as a classification unit 7.

  In this integrally formed cylindrical body 5, a ring part 8 provided on the outer periphery of the dry cylindrical body 2 and a ring part 8 provided on the outer periphery of the classification cylindrical body 3 are provided on the gantry 9. The support roller 10 is rotatably supported. In this example, the cylindrical body 5 is rotated at a predetermined rotational speed by a drive motor (not shown) that rotationally drives the support roller 10. This drive motor is controlled by a control device (not shown). The control device is configured to control the drive motor at a rotation speed set in advance according to the classification object M or at a rotation speed set by the operator according to the classification object M. Note that the cylindrical body 5 may be driven in other configurations.

  At the center of the charging cylinder 2 on the charging side, the tip of a charging chute 13 for charging the classification object M is located. The charging chute 13 is supported by a chute support member 14 provided on the gantry 9. The to-be-classified object M is thrown into the charging chute 13 from the conveyor 15.

  An air supply unit 11 for supplying dry air to the dry cylindrical body 2 is provided on the input side of the dry cylindrical body 2. The air supply unit 11 is provided with a cover 11a so as to surround the input side of the dry cylindrical body 2, and a sealant 12 seals between the cover 11a and the rotating cylindrical body 5. . A dry air A such as hot air is supplied into the cover 11a from a dry air feeder (not shown).

  As shown in FIGS. 1 and 2, the dry cylindrical body 2 is rotated by left rotation in FIG. 2. In this embodiment, a slit-shaped opening 2a that opens in the axial direction at the center of the dry cylindrical body 2, and an overlap portion 2b that overlaps in the counter-rotating direction on the inner diameter side of the slit-shaped opening 2a, Is provided with a drying cylinder 2c. By such a drying cylinder 2c, the classification object M supplied to the inside of the rotating drying cylinder 2 is rotated and moved by the overlap portion 2b without falling from the slit-shaped opening 2a, and the drying air A is opened. It is supplied to the inside of the dry cylindrical body 2 from the slit-shaped opening 2a, and the classifying object M can be dried by sufficiently contacting the classifying object M that rotates and moves. The air supply unit 11 includes the drying cylinder 2c and the cover 11a.

  According to the drying unit 6, the dry air A is supplied to the inside of the dry cylindrical body 2 while rotating the classification object M inside the dry cylindrical body 2. Even if it exists, it can be dried effectively. Further, in this embodiment, since the dry cylindrical body 2 is a cylindrical body having the same diameter, the residence time of the classified substance M rotated inside the dry cylindrical body 2 is lengthened, and the drying effect is increased. It is high.

  Furthermore, a plurality of scraping plates 16 are provided on the inner surface of the classification cylindrical body 3 in the axial direction. The scraping plate 16 is for scraping up the classification object M supplied to the inside of the classification cylindrical body 3 to a predetermined height and dropping it by its own weight. The classified object M scraped up by the scraping plate 16 is crushed by the dropped impact.

  Further, in this embodiment, the classification cylindrical body 3 is a cylindrical body whose diameter is increased from the input side toward the discharge side, so that the classification cylindrical body 3 is scraped up and classified by the inclination of the classification cylindrical body 3. The classified object M is sequentially moved from the input side to the discharge side.

  As shown in FIGS. 1 and 3, in the axial direction of the classification cylindrical body 3, a collision plate 17 that collides with an object M to be classified that is scraped and dropped inside the classification cylindrical body 3, A suction pipe 18 is provided for sucking a lightweight object in the classified object M that has been crushed by colliding with the collision plate 17.

  The suction pipe 18 includes a cylindrical pipe body 18a supported on the gantry 9 side, and a suction portion 18b extending from the pipe body 18a in the axial direction of the classification cylindrical body 3. A cyclone 19, a collector 20, and a blower 21 are connected to the pipe body 18 a and sucked by the blower 21.

  On the other hand, the suction portion 18b is provided with a suction groove 18c in the upper axial direction. A collision plate 17 is provided on the upper portion of the suction portion 18b. As shown in FIG. 3, the collision plate 17 is formed of a vertical surface 17a that is fixed to the suction portion 18b and extends in the vertical direction, and an inclined surface 17b that is inclined downward at a predetermined angle from the upper end of the vertical surface 17a. ing. The inclined surface 17b is formed as an inclined surface that collides when the classification object M scraped up by the rotation of the classification cylindrical body 3 falls. In this embodiment, the classification cylindrical body 3 rotates clockwise in FIG. 3 and the classification object M is scraped up from the left side, so that a vertical surface 17a is formed in the vertical direction from the right side of the suction portion 18b, and from the upper end thereof An inclined surface 17b is formed toward the lower left side. This inclined surface 17b is provided above the suction portion 18a so as to sandwich the center line of the classification cylindrical body 3, and the lower end of the inclined surface 17b and the suction A predetermined gap 22 is formed between the portion 18b. The gap 22 serves as a nozzle-like suction port (hereinafter referred to as “22”) that can suck the lightweight object ML in the classification object M into the suction groove 18c provided in the axial direction of the suction part 18b. Is formed.

  That is, the classification object M scraped up by the scraping plate 16 of the classification cylindrical body 3 falls from its upper part by its own weight, collides with the collision plate 17 and is crushed, and the lightweight object ML in the classification object M. Is sucked from the suction port 22 of the suction pipe 18, and the heavy object MH is configured to fall below the classification cylindrical body 3. The inclined surface 17b of the collision plate 17 has an angle that is easy to be crushed when the classification object M collides, and is set to an angle that guides the crushed light weight ML to the suction port 22. As the number of rotations of the classification cylindrical body 3, the classification object M that falls by its own weight is rotated at a preferable number of rotations so as to collide with the inclined surface 17 b of the collision plate 17. What is necessary is just to set with the control apparatus according to the property of the to-be-classified object M as predetermined | prescribed rotation speed which rotates this classification cylinder 3. As shown in FIG. For example, the rotational speed is set so that the wind speed is about 8 m to 16 m / sec.

  The suction part 18b is sucked from the nozzle-like suction port 22, so that the suction force on the tip side (right side in FIG. 1) is slightly weakened. In this case, as shown in FIG. 4, the suction part 18b May be formed by a plurality of pipes 18d so that the suction force is equal.

  As shown in FIG. 1, on the discharge side of the classification tubular body 3, a discharge portion 23 is provided for discharging heavy objects classified by the classification tubular body 3. The discharge part 23 is formed by a cover that surrounds the discharge side end of the classification cylindrical body 3, and is sealed with a sealing material 24 between the rotation and the classification cylinder 3. From this discharge part 23, the heavy goods classified by the classification cylindrical body 3 are discharged downward.

  According to the wind classifier 1 configured as described above, when the cylindrical body 5 is rotated and the classification object M is input from the charging chute 13, the classification object M is rotated inside the dry cylindrical body 2. While being made to dry, it is dried by the drying air A, and the dried classification object M is transferred to the classification cylindrical body 3 side.

  The to-be-classified object M transferred to the classifying cylindrical body 3 is scraped up by a scraping plate 16 provided on the inner surface of the classifying cylindrical body 3, and the to-be-classified object M scraped up to the upper part is caused by its own weight. Fall. The falling classification object M collides with the inclined surface 17b of the collision plate 17 and is crushed, so that the heavy object MH and the light object ML are separated. The separated lightweight object ML is sucked into the suction portion 18b through the suction groove 18c from the slit-like gap 22 provided between the lower end of the inclined surface 17b of the collision plate 17 and the suction portion 18b, and the cyclone 19 , Separated and collected by the collector 20. The heavy object that has not been sucked into the suction part 18b falls to the lower part of the classification tubular body 3. The fallen heavy object is picked up again by the scraping plate 16, and the crushing by the falling of its own weight and the suction of the light object are repeated. That is, in the classification cylindrical body 3, crushing of the classification object M and air classification are repeated.

  In this way, the classified object M that is scraped and dropped by the rotation of the classification cylindrical body 3 collides with the collision plate 17 at the time of dropping, and is crushed, and the lightweight object is sucked into the suction pipe 18 and separated. The lightweight object ML separated from the classified object M is not mixed with the heavy object MH or the new classified object M again. That is, since the light-weight material ML once separated is not mixed with the classification object M again, the classification object M can be classified efficiently.

  The heavy material MH such as non-combustible material such as soil or stone from which the light material ML such as combustible material is separated in this way is used as a backfill material if it is excavated soil such as road works. It is possible to recycle the classified material M of building waste.

  FIG. 5 is a side view of a longitudinal section of an air classifier showing a second embodiment of the present invention, FIG. 6 is a VI-VI sectional view of the wind classifier, and FIG. It is a schematic diagram which shows the other combination example of a drying part and a classification part. In the second embodiment, an example of a cylindrical body formed in a cylindrical shape is shown. In addition, the same code | symbol is attached | subjected to the structure same as the structure in the said 1st Embodiment, and the detailed description is abbreviate | omitted.

  As shown in FIG. 5, the cylindrical body 25 in the second embodiment is formed in a cylindrical shape having the same diameter from the input side (the right side in the figure) to the classification object M to the discharge side (the left side in the figure). Yes. The entire cylindrical body 25 is inclined at a predetermined angle with the discharge side facing downward (for example, inclined by 5 degrees). Thereby, even if it is the cylindrical cylinder 25, the to-be-classified object M can be moved toward the discharge | emission side from the injection | throwing-in side.

  The cylindrical body 25 of this embodiment is obtained by integrally connecting an input side cylindrical body 26, a classification cylindrical body 27, and a discharge side cylindrical body 28. Ring portions 8 are provided on the outer circumferences of the input side cylindrical body 26 and the discharge side cylindrical body 18, and these ring portions 8 are rotatably supported by support rollers 10 provided on the gantry 9. . Also in this example, the support roller 10 is rotationally driven, and the cylindrical body 25 is rotated at a predetermined rotational speed.

  The leading end of the conveyor 15 is inserted in the center of the charging side cylindrical body 26, and the classified object M is supplied into the cylindrical body 25 by the conveyor 15. A discharge chute 13 fixed to the gantry 9 is provided on the discharge side of the cylindrical body 25. A sealing material 24 is provided between the discharge chute 13 and the rotating cylindrical body 25.

  5 and 6, a support base 29 is provided inside the cylindrical body 25 so as to penetrate the axial direction. The support base 29 is fixed to the gantry 9. On one side of the support base 29, an air supply unit 30 for supplying a drying air A for drying the classification object M is provided. The air supply section 30 of this embodiment is configured by a pipe material 30a having a predetermined diameter provided substantially over the axial length of the classification cylindrical body 3, and an opening 30b that opens laterally from the pipe material 30a. Yes. The opening 30b is formed in a slit shape that opens continuously in the axial direction. The drying material A is supplied to the pipe material 30a and sprayed in the lateral direction from the opening 30b to dry the classification object M. In this embodiment, the input side of the classification cylindrical body 3 is a drying unit for drying the classification object M, but the air supply unit 30 is provided up to the discharge side.

  In the predetermined range on the discharge side of the classification cylindrical body 3, a plurality of scraping plates 31 that scrape the classification object M on the inner surface are provided in the axial direction. Further, in the axial direction of the classification cylindrical body 27 provided with the scraping plate 31, a collision plate 32 that collides with the classification object M that is scraped up and dropped inside the classification cylindrical body 27, and this A suction pipe 33 is provided for sucking a lightweight object in the classified object M that has been crushed by colliding with the collision plate 32.

  As shown in FIGS. 5 and 6, the suction pipe 33 is supported by a bracket 29 a provided on a support base 29 with a suction portion 33 b extending in the axial direction of the classification cylindrical body 27. A cyclone 19, a collector 20, and a blower 21 are connected to the suction portion 33 b and sucked by the blower 21.

  On the other hand, the suction portion 33b is provided with a suction groove 33c in the upper axial direction. The collision plate 32 provided on the upper portion of the suction pipe 33 includes a vertical surface 32a that is fixed to the suction portion 33b and extends in the vertical direction, and an inclined surface 32b that is inclined downward at a predetermined angle from the upper end of the vertical surface 32a. It is formed with. The inclined surface 32 b is formed as an inclined surface that collides when the classification target M scraped up by the rotation of the classification cylindrical body 27 falls. A predetermined gap 34 is provided between the lower end of the inclined surface 32b and the suction portion 33b. The gap 34 is formed as a slit-like suction port (hereinafter referred to as 34) that can suck the light weight in the classification object M into the suction groove 33 c.

  The inclined surface 32b of the collision plate 32 in this embodiment is also set to an angle that is easy to be crushed when the classification object M collides, and the number of rotations of the classification cylindrical body 27 is also the classification object that falls by its own weight. The number of rotations is preferably set so that M collides with the inclined surface 32b of the collision plate 32.

  In this embodiment, the cylindrical body 25 is formed with the same diameter from the input side to the discharge side. However, when it is necessary to sufficiently dry the classification object M on the input side, FIG. As shown in the figure, a taper-shaped drying cylindrical body whose diameter is reduced from the input side to the discharge side is provided on the input side to lengthen the residence time of the classification object M, and the drying time in the drying unit 6 is increased. You can make it longer. Also in this embodiment, the axis of the classifying cylindrical body 27 can be made closer to the horizontal by making the classifying cylindrical body 27 have a tapered shape whose diameter increases toward the discharge side.

  According to the wind classifier 35 configured as described above, the classification object M supplied by the conveyor 15 is dried by the drying air while being rotated on the charging side of the classification cylinder 27, and the classification cylinder is obtained. 27 is moved to the discharge side 31 on the discharge side. The to-be-classified object M moved to the scraping plate 31 is scraped up by the scraping plate 31 and falls by its own weight at the upper part.

  The fallen classification object M collides with the inclined surface 32b of the collision plate 32 and is crushed, and a lightweight object ML such as a combustible material is sucked from the gap 34 between the lower end of the inclined surface 32b and the suction pipe 33. It is sucked into the portion 33b and separated and collected by the cyclone 19 and the collector 20. The heavy object MH that has not been sucked into the suction part 33 b falls to the lower part of the classification cylindrical body 27. The dropped heavy object MH is picked up again by the scraping plate 31, and the pulverization due to falling by its own weight and the suction of the light object ML are repeated. Thus, in the classification cylindrical body 27, the crushing of the classification object M and the air classification are repeated.

  Also in this embodiment, the lightweight object ML in the classified object M that has been crushed by being dropped by being rotated by the rotation of the cylindrical body 25 is separated from the suction pipe 33 by being sucked and separated. The lightweight object ML separated from the inside is not mixed with the heavy object MH again. That is, since the once separated lightweight object ML is not mixed again, the classified object M can be classified efficiently.

  Other functions and effects are the same as those of the air classifier 1 of the first embodiment described above, and thus detailed description thereof is omitted.

  Moreover, in any of the above-described embodiments, by increasing the length of the cylindrical bodies 5 and 25, it is possible to easily improve the classification accuracy and the classification ability.

  In the first embodiment, the drying unit 6 is provided on the input side of the classification object M and the classification unit 7 is provided on the discharge side to separate them. In the second embodiment, however, the drying unit 6 is a drying unit. The part 6 and the classifying part 7 are not clearly separated. The drying unit 6 and the classified product 7 are not limited to these embodiments, and the first embodiment and the second embodiment may be combined.

  Whether the cylindrical bodies 5 and 25 are tapered so that the diameter increases from the input side to the discharge side or whether the shaft core is inclined with the same diameter in consideration of the classification object M and the machine installation conditions. To decide. The cylindrical bodies 5 and 25 may have a polygonal cross section (for example, an octagonal cross section or a dodecagon cross section) in addition to the circular cross section.

  Furthermore, although the air classifier 1 and 35 in embodiment mentioned above showed the example comprised so that it could be dried when the to-be-classified object M is a wet thing, the to-be-classified object M is a dry thing. In some cases, there is no need to provide a drying section.

  Further, the above-described embodiment shows an example, and various modifications can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

  The air classifier according to the present invention can be used for an air classifier that wants to efficiently classify an object to be classified in which heavy and light objects are mixed, such as building waste.

It is the side view which carried out the longitudinal cross-section of the wind classifier which shows 1st Embodiment of this invention. It is II-II sectional drawing of the wind classifier shown in FIG. It is III-III sectional drawing of the wind classifier shown in FIG. It is a side view which shows the example of an internal structure of the suction pipe of the wind classifier shown in FIG. It is the side view which carried out the longitudinal cross-section of the wind classifier which shows 2nd Embodiment of this invention. It is VI-VI sectional drawing of the air classifier shown in FIG. It is a schematic diagram which shows the other combination example of the drying part and classification part in the wind classifier shown in FIG.

Explanation of symbols

1 ... Wind classifier
2 ... Dry cylinder
3 ... Classification cylinder
5 ... Cylindrical body
6 ... Drying section
7 ... Classification part
8 ... Ring part
DESCRIPTION OF SYMBOLS 9 ... Stand 10 ... Support roller 11 ... Air supply part 12 ... Sealing material 13 ... Input chute 15 ... Conveyor 16 ... Scooping plate 17 ... Collision plate 17b ... Inclined surface 18 ... Suction pipe 19 ... Cyclone 20 ... Collector 21 ... Blower 22 ... Gap (suction port)
DESCRIPTION OF SYMBOLS 23 ... Discharge part 24 ... Sealing material 25 ... Cylindrical body 26 ... Input side cylindrical body 27 ... Classification cylindrical body 28 ... Discharge side cylindrical body 29 ... Support stand 30 ... Air supply part 31 ... Scooping plate 32 ... Collision Plate 32b ... Inclined surface 33 ... Suction pipe 34 ... Crevice (suction port)
35 ... Wind classifier
M ... Classified items ML ... Lightweight items MH ... Heavy items

Claims (7)

A wind classifier for classifying an object to be classified by wind power,
Provide a cylindrical classification unit that rotates at a predetermined rotational speed,
In the axial direction inside the classifying unit, by rotating the classifying unit, a plurality of scooping plates are provided to scrape the classifying object from the lower part toward the upper part, and a light classifier in the classifying object is provided. Provide a suction pipe to suck in,
Provided on the upper side of the suction pipe is a collision plate that collides when an object to be classified scraped by the scraping plate falls,
An air classifier in which a suction port is formed between the collision plate and the suction pipe for sucking a light classification object in the classification object into the suction pipe.   2. The wind classifier according to claim 1, wherein the suction pipe is provided over substantially the entire length of the classifying portion in the axial direction, and a suction port provided between the suction pipe and the collision plate is provided over the substantially entire length of the suction pipe.   The impingement plate is formed with an inclined surface that collides with an object to be classified that has been scraped and dropped by a scraping plate, and the light classification object is sucked into the suction pipe between the lower end of the inclined surface and the suction pipe. The air classifier according to claim 1, wherein a suction port is formed.   4. A cylindrical rotating drying unit is provided on the classification product input side of the classification unit, and a drying air supply unit for supplying a dry air to the classification product is provided in the drying unit. The wind classifier described in the section.   A slit-like opening that opens in the axial direction of the drying part and an overlap part that overlaps in the counter-rotating direction on the inner diameter side while maintaining the opening of the slit-like opening is provided in the drying air supply part. Item 5. A wind classifier according to item 4.   The lower surface of the drying unit is formed almost horizontally so that the axial feed of the classification object in the drying unit becomes slow, and the lower surface of the classification unit is made faster in the classification unit so that the axial feed of the classification object becomes faster. The wind classifier according to claim 4, wherein the wind classifier is formed so as to be inclined downward toward the discharge side. The wind classifier according to any one of claims 1 to 6, further comprising a control device that controls the number of rotations of the classification unit in accordance with the type of the classification object.

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