JP4499054B2 - Dehydration dryer - Google Patents

Description

  The present invention relates to a dehydrating and drying apparatus that rotates a bucket at a high speed to separate solids and liquids. More specifically, when a resin bottle is crushed and separated for each resin material, the resin material and moisture are separated. The present invention relates to a dehydrating and drying apparatus suitable for performing the above.

  One of the resin products on the market is a container for drinking water, and this container uses various resin materials for a main body and a bottom, a lid, a surface decoration seal, and the like. For example, in a container called a PET bottle, polyethylene terephthalate (PET) is used for the main body, PET or polypropylene (PP) is used for the wine bottom, and polystyrene (PS) is used. Polypropylene (PP) may be used not only for the components on the main body side but also for the lid.

  In recent years, in response to demands for reusing resources, it has been practiced to use a resin product that has been pulverized by pulverization as a molding material (for example, Patent Document 1).

When reusing PET bottles, in order to prevent the mixing of different types of resin, it is classified into each resin material used for the PET bottles to be crushed, and each resin material is extracted. ing.
As disclosed in Patent Document 1, as a method for classifying each resin material, there is a method of putting a pulverized resin material into water and separating the one that floats and sinks using the difference in specific gravity. is there.

By the way, the resin material separated in water is then dried, that is, the water is removed to be reused material. However, a configuration using a centrifugal separation system has been proposed for removing water (for example, Patent Documents). 2).
In Patent Document 2, the resin material after separation is put into a conical cone-shaped rotating basket having a large number of through-holes on one surface of the peripheral wall, and water is blown outward from the through-holes of the peripheral wall using centrifugal force. A so-called draining configuration is disclosed.

JP-A-9-192533 (paragraph "0008" column) Japanese Patent Laid-Open No. 63-143958 (page 2, lower right column, lines 7 to 18)

In the configuration for removing moisture from the resin material that has been subjected to specific gravity separation in water, in particular, the configuration disclosed in Patent Document 2, there is an advantage that moisture can be removed in the process of transporting the resin material. However, the resin material recovery means provided on the outer side of the rotating basket is configured to receive the resin material falling beyond the upper edge of the rotating basket. It has a duct shape with a flat step.
For this reason, a part of the resin material that has fallen beyond the upper edge of the rotating basket may accumulate in the step portion without being discharged into the duct. If the resin material accumulated in the stepped portion increases, the progress of the resin material released into the duct may be hindered, and the resin material after dehydration may not be smoothly discharged.

  An object of the present invention is to provide a dehydration drying apparatus having a configuration capable of smooth dehydration treatment and transporting a resin material after dehydration in view of the problems in the above-described conventional dehydration drying apparatus.

In order to achieve this object, the present invention comprises the following arrangement.
(1) A centrifugal dewatering device having a perforated inverted conical rotating basket and a cyclone for further drying the dehydrated object,
A granular raw material containing moisture, which is an object to be dehydrated, is continuously charged from the central opening of the lid case of the housing into the center of the basket of the centrifugal dehydrator,
The raw material is continuously pushed up by a centrifugal force along the perforated inverted conical wall and discharged from the upper end perforated inverted conical wall onto the partition plate of the housing,
The raw material on the partition plate is a dehydrating and drying apparatus having a configuration that is sucked and dried by the cyclone through a dehydrated raw material discharge duct of the dehydrating apparatus,
The lid case includes a raw material input opening on the upper surface, and a dehydrated raw material discharge duct on the side surface.
The inclination angle of the perforated inverted conical wall is set to an angle that allows the upward movement of the basket based on the rotation speed of the basket and the weight of the dewatering object with respect to the plane of the partition plate, and the charged raw material is a gap Is pushed up continuously,
A rotating blade is provided at the upper edge of the perforated inverted conical wall and rotates in a state of being opposed to the upper surface at a certain interval on the surface of the partition plate,
The dehydrating and drying apparatus is configured such that the raw material on the partition plate is sucked and dried by the cyclone through the dehydrated raw material discharge duct without stagnation.
In the present invention, the rotating blade provided at the upper edge of the porous conical wall in the porous conical rotating basket rotates on the surface of the partition plate, so that the raw material accumulated on the partition plate can be scraped off.

(2) The dehydration drying apparatus further includes a hot air supply source,
The raw material is dehydrated drying apparatus according to, characterized in that it is configured to be continuously charged with hot air from the hot air source to the basket (1).
In the present invention, it is possible to dry while dehydrating by supplying hot air simultaneously with starting materials.

  According to the present invention, the porous conical rotating basket is provided with a rotating blade that is closely opposed to the partition plate on the housing side from which the raw material is discharged from the upper edge of the porous conical rotating basket with a certain distance. When the porous conical rotating basket rotates, the raw material present on the surface of the partition plate is swept away. This prevents the retention of the raw material on the partition plate surface and prevents the movement of the raw material released from the upper edge of the porous conical rotating basket so as to prevent the movement efficiency and dehydration efficiency of the dehydrated raw material from being reduced. it can.

  The best mode for carrying out the present invention will be described below with reference to the embodiments shown in the drawings.

  FIG. 1 is a system configuration diagram of a dehydration drying apparatus according to the present embodiment. The granular raw material in this embodiment is made of a resin material such as PET, PP, PS or the like.

  In FIG. 1, a resin product brought into a reprocessing factory or the like is dehydrated by a centrifugal dehydrator 100 having the configuration shown in FIG. 2 and communicated with a dehydrated raw material discharge duct 200 provided in the centrifugal dehydrator 100. Then, the inside is transported to the cyclone drying unit 300 that tends to be negative pressure by the air exhaust device 500, and is taken out to the outside by the rotary valve 400 disposed in the small diameter portion of the bottom of the cyclone drying unit 300. Yes.

  The rotary valve 400 has a plurality of equally divided spaces 400A (divided into four in FIG. 1) in the circumferential direction, and each space faces the internal space and the take-out side of the cyclone drying unit 300 by rotating equally. It is configured.

The configuration of the centrifugal dehydrator 100 is shown in FIG.
In FIG. 2, the centrifugal dewatering device 100 is disposed in the casing 101 so as to cover the porous cone rotating basket 103 disposed in the casing 101 and driven to rotate by the drive motor 102, and the porous cone rotating basket 103. Although not shown, a lid case 104 capable of supplying hot air toward the porous conical rotating basket 103, and the lower surface of the lid case 104 and the casing 101 in the vicinity of the upper edge of the porous conical rotating basket 103 are shown. A partition plate 105 that partitions the upper surface and prevents the raw material released from the upper edge of the porous conical rotating basket 103 from entering the inside of the housing 101 is provided.

The casing 101 has a space in which the porous conical rotating basket 103 can be accommodated, and the bottom surface of the casing 101 is an inclined surface that can move the dropped water by gravity. A mouth 101A is provided.
A partition plate 105 that can shield the interior of the casing 101 and the space at the upper edge of the porous conical rotating basket 103 at a position lower than the upper edge of the porous conical rotating basket 103 on the upper surface of the casing 101. Are integrated with the housing 101 by fastening or the like. The partition plate 105 has a function of preventing the raw material released from the upper edge of the porous conical rotating basket 103 from entering the housing 101.

The porous conical rotating basket 103 has a truncated inverted conical cone shape, and a plurality of small holes 103A are formed on the peripheral wall thereof.
The peripheral wall of the porous conical rotating basket 103 has an inclination angle (θ) set to an angle at which the raw material can be moved up and down based on the rotational speed and the weight of the raw material. In this embodiment, the partition plate It is set to 70 to 76 degrees with respect to 105 planes. Accordingly, the raw material can move toward the upper edge of the porous conical rotating basket 103 along the inner surface of the peripheral wall by using the rotational speed and the inclination angle of the porous conical rotating basket 103.

On the other hand, the small holes 103A formed in large numbers on the peripheral wall of the porous conical rotating basket 103 are set to have a diameter of about 2 mm corresponding to a size smaller than the size of the raw material, and the opening ratio with respect to the peripheral wall area is about 25%. It is made into the part used as for draining.
Thereby, the raw material is not clogged in the small holes, and the opening area necessary for draining can be secured.

The lid case 104 integrated on the upper surface of the housing 101 is coaxial with the porous conical rotating basket 103, in other words, can feed the raw material together with hot air at the same center position as the rotational center of the porous conical rotating basket 103. 104A, and a space 104B facing the upper edge of the porous conical rotating basket 103 is connected to a dehydrated raw material discharge duct 200 as shown in FIGS. .
The central axis of the dehydrated raw material discharge duct 200 is parallel to the rotational tangent of the porous conical rotating basket 103, as indicated by the symbol L in FIG. 3, so that the dehydrated raw material can be conveyed.

On the upper edge of the porous conical rotating basket 103, a rotating blade 106 is provided that rotates in a state of being opposed to and close to the surface of the partition plate 105 at a constant interval.
The rotating blade 106 is provided at equal positions in the circumferential direction on the upper edge of the porous conical rotating basket 103. In this embodiment, as shown in FIG. 3, the porous conical rotating basket 103 is provided at a relative position (180 degree phase relationship) across the rotation center.
As shown in FIG. 3, the rotary blade 106 is a flat plate member having a uniform V thickness with a truncated V shape, and an end surface having the same cross-sectional shape in any rotational direction has a rotational direction. It is located upstream.
Note that the rotating blade 106 may have not only a flat plate shape as a circumferential cross-sectional shape but also a triangular shape with the side facing the partition plate 105 as a base. By adopting this shape, the raw material existing on the surface of the partition plate 105 can be satisfactorily removed.

  The rotary blade 106 is positioned above the partition plate 105. However, the rotary blade 106 is covered with a lid in order not to cause a collision or the like in the process in which the raw material is discharged from the porous conical rotary basket 103 and conveyed. A positional relationship (H2> H) that is higher (height indicated by reference numeral H2 in FIG. 2) than the height (the height indicated by reference numeral H in FIG. 2) in the vicinity of the connection position with the duct 200 in the case 104. Is also possible.

  The rotating blade 106 can be rotated together with the porous conical rotating basket 103 by being integrated with the porous conical rotating basket 103. Thereby, the raw material scattered on the upper surface of the partition plate 105 can be scraped, and the scraped raw material is discharged toward the dehydrated discharge duct 200 by the centrifugal air flow generated in the lid case 104. become.

Since the present embodiment is configured as described above, when a raw material containing moisture is introduced together with hot air from the inlet 104A provided in the lid case 104, it is along the peripheral wall of the rotating porous conical rotating basket 103. The raw material rises while spirally moving.
The raw material is drained by a lot of small holes 103 </ b> A in the peripheral wall due to the centrifugal force of the porous conical rotating basket 103, and when it reaches the lid case 104, a space located above the porous conical rotating basket 103. 104B is discharged by centrifugal force and sent to the dehydrated raw material discharge duct 200.

  The raw material discharged into the dehydrated raw material discharge duct 200 is introduced into the cyclone unit 300 using the fact that the inside of the cyclone unit 300 tends to be negatively pressured by the air exhaust device 500, and the lower part of the cyclone unit 300 is It is taken out to the outside through the rotary valve 400 located at the position.

  Since the rotating blade 106 rotates above the partition plate 105 in conjunction with the rotation of the porous conical rotating basket 103, when the raw material is accumulated on the partition plate 105 during the rotation process, the raw material is scraped off, So-called swept up and discharged toward the dehydrated raw material discharge duct 200. Thereby, when the raw material is deposited on the partition plate 105, the movement of the raw material is not hindered, and the raw material after dehydration can be smoothly conveyed.

In addition, if hot air is supplied together with the raw material into the porous conical rotating basket 103, an improvement in the degree of drying due to temperature rise can be expected in addition to centrifugal dehydration.
In addition, since the raw material after dehydration is forcibly introduced into the cyclone unit 300, it is forcibly taken out by the rotary valve 400. Therefore, unlike the case where the raw material is stored, the reattachment of water droplets due to a temperature drop. Thus, a raw material with improved dehydration and drying efficiency can be obtained.

1 is a system configuration diagram of a dehydration drying apparatus according to an embodiment of the present invention. It is a schematic diagram for demonstrating the structure of the centrifugal dehydration apparatus used for the dehydration drying apparatus shown in FIG. It is a principal part top view of the centrifugal dehydration apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Centrifugal dehydrator 101 Case 102 Drive motor 103 Porous conical rotating basket 104 Cover case 104A Input port 105 Partition plate 106 Rotating blade 200 Dehydrated raw material discharge duct 300 Cyclone part 400 Rotary valve 500 Exhaust device

Claims (2)

It consists of a centrifugal dewatering device having a perforated inverted conical rotating basket and a cyclone for further drying the dehydrated object,
A granular raw material containing moisture, which is an object to be dehydrated, is continuously charged from the central opening of the lid case of the housing into the center of the basket of the centrifugal dehydrator,
The raw material is continuously pushed up by a centrifugal force along the perforated inverted conical wall and discharged from the upper end perforated inverted conical wall onto the partition plate of the housing,
The raw material on the partition plate is a dehydrating and drying apparatus having a configuration that is sucked and dried by the cyclone through a dehydrated raw material discharge duct of the dehydrating apparatus,
The lid case includes a raw material input opening on the upper surface, and a dehydrated raw material discharge duct on the side surface.
The inclination angle of the perforated inverted conical wall is set to an angle that allows the upward movement of the basket based on the rotation speed of the basket and the weight of the dewatering object with respect to the plane of the partition plate, and the charged raw material is a gap Is pushed up continuously,
A rotating blade is provided at the upper edge of the perforated inverted conical wall and rotates in a state of being opposed to the upper surface at a certain interval on the surface of the partition plate,
The dehydrating and drying apparatus is configured such that the raw material on the partition plate is sucked and dried by the cyclone through the dehydrated raw material discharge duct without stagnation. The dehydration drying apparatus further includes a hot air supply source,
The raw material is dehydrated drying apparatus according to claim 1, characterized in that it is configured to be continuously charged with hot air from the hot air source to the basket.

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