JP4878618B2 - Separation device - Google Patents

Description

  The present invention relates to a cyclonic separation device.

  As a separation device for separating and removing the powdery material from the mixture of the granular material and the powdery material (for example, a pulverized resin recovery product) and taking out the granular material, one utilizing a cyclone action has been proposed. (For example, see Patent Document 1). This type of separation device has a tapered cylinder that gradually decreases in diameter from the upper part (upstream side) to the lower part (downstream side), and this cylinder is formed by a filter material such as a perforated plate, for example. ing.

That is, when the mixture is supplied to the tapered cylinder from the upper part to the lower part together with the compressed air, a swirl flow along the inner peripheral surface is generated inside the cylinder, and as a result, the mixture comes into contact with the filter material. The state continued, and only the powdery matter was discharged out of the cylinder (sieved).
JP 2002-192017 A

  In the conventional separation apparatus, a lot of powdery material still remains in the taken-out granular material, and the purity (separation efficiency) as the granular material has been insufficient. In such a case, the powdery material has not only a problem that the particle size is not sufficient, but also a problem that impurities are included (for example, iron powder or the like may be included in the resin particles to be obtained). For this reason, various problems such as quality control and moldability at the time of reusing the taken-out granular material have occurred. In addition, there is a problem in terms of effective use of resources because the recovery rate of taking out the particulate matter from the mixture is poor.

  This invention is made | formed in view of the said situation, Comprising: It aims at providing the separation apparatus excellent in the separation efficiency more than predetermined particle size.

In order to achieve the above object, the present invention has taken the following measures.
That is, the separation apparatus according to the present invention includes a separation cylinder 6 formed by a filter material 5 that tapers from an introduction section 3 that introduces air while swirling air to an extraction section 4 that discharges air, and the separation cylinder. 6 is provided with a diffusing member 7 that is disposed with a gap K and diffuses the flow of introduced air ,
The diffusion member (7) is mounted on a support rod (25) inserted from the introduction part (3) side into the separation cylinder (6), and a gap (K between the separation cylinder (6) (K) ) Is gradually reduced from the upstream side to the downstream side.
The support rod (25) is formed of a permanent magnet, and the diffusion member (7) is provided on the support rod (25) so that the position in the air flow direction can be adjusted .

With such a configuration, the diffusing member 7 generates a small vortex or turbulent flow, a radially outward flow, a high-speed flow (including both the swirling direction and the axial direction), and the like. Thus, the chance of contact of the air flow with the inner peripheral surface of the separation cylinder 6 (that is, the filter material 5) is increased. For this reason, the separation efficiency of the filter material 5 having a predetermined particle size or more is also increased. In addition, metal powder can be removed, and the axial arrangement of the diffusing member 7 can be adjusted to an optimum state.

The diffusing member 7 has an outer peripheral surface formed as a tapered surface 7b that widens from the upstream end surface 7a, a cylindrical surface 7c is formed from the tapered surface 7b to the downstream end surface 7d, and the downstream end surface 7d is a separation cylinder. It is good also as what was formed perpendicularly | vertically with respect to 6 cylinder centers.
If it does in this way, the generation | occurrence | production rate of the eddy current by the diffusion member 7, a turbulent flow, the flow toward the radial direction outward, a high-speed flow will be raised. There is also an advantage that an obstacle (pipe resistance) against the axial flow can be suppressed.

Sectional area at the position of the maximum diameter of the diffusing member 7, Ru preferably der to set wider than the cross-sectional area of the gap K between the separation cylinder 6.

  The separation apparatus according to the present invention is excellent in separation efficiency of a predetermined particle size or more.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of a separation apparatus 1 according to the present invention, and FIG. 3 shows a resin recovery system 2 as an example using the separation apparatus 1. As shown in FIG. 1, the separation device 1 has a separation cylinder 6 formed by a filter material 5 that tapers from an introduction part 3 for introducing air toward an extraction part 4 for discharging air. In addition, a diffusion member 7 for diffusing the flow of the introduced air is provided inside the separation cylinder 6.

  The separation cylinder 6 is preferably used in a state of being housed in the casing 8. The casing 8 has a cylindrical housing 10 formed so as to surround the whole while maintaining a circumferential space around the separation cylinder 6 and a state in which the casing 8 side of the separation cylinder 6 is covered from above. It has the cap body 11 connected with respect to the housing 10, and the bottom body 14 connected with the housing 10 in the state which covers the extraction part 4 side of the separation cylinder 6 from the bottom.

  In the casing 8, the housing 10 and the cap body 11 communicate with each other only through the inside of the separation cylinder 6. The housing 10 has an outer peripheral surface of the separation cylinder 6. The cap body 11 is provided with a supply port portion 13 facing the introduction portion 3 of the separation cylinder 6. The bottom body 14 is provided with an outlet portion 15 having a direct communication relationship with the outlet portion 4 of the separation cylinder 6.

  As shown in FIG. 3, the resin recovery system 2 connects a separation device 1 according to the present invention, a suction hopper 21, and a loader 22 to a pulverizer 20 that pulverizes an article to be processed (resin recovered material). In addition, the product to be processed is sucked and transported from the pulverizer 20 to the loader 22 by a blower provided in the loader 22, and the suction hopper 21 and the loader 22 as well as the separation device 1 perform sorting based on a predetermined particle size. To be done.

  In the separation cylinder 6, the filter material 5 is formed of a porous plate such as a stainless punching metal. The hole diameter, the number of holes (opening ratio), etc. in the perforated plate can be appropriately selected according to the particle diameter of the product grains to be obtained. Since the filter material 5 has a conical shape that tapers toward the extraction portion 4 that discharges air from the introduction portion 3, the air introduced into the introduction portion 3 swirls along the inner peripheral surface of the filter material 5. It becomes like this.

  A support rod 25 is provided in a state in which one end is fixed in the cap body 11 of the casing 8, and the other end of the support rod 25 passes through the introduction portion 3 of the separation cylinder 6 and enters the separation cylinder 6. To be inserted. The diffusion member 7 is attached to the support rod 25. The support rod 25 is formed of a 10,000 gauss permanent magnet.

  As shown in FIG. 2, the diffusion member 7 is formed in a truncated cone shape having an outer peripheral surface that gradually decreases the gap K between the separation cylinder 6 from the upstream side to the downstream side. A tapered surface 7b formed so as to extend from the upstream end surface 7a, a cylindrical surface 7c formed with a constant diameter from the tapered surface 7b, and formed perpendicular to the cylinder center of the separation cylinder 6 from the cylindrical surface 7c. And a downstream end face 7d. In the present embodiment, the diffusing member 7 is made of stainless steel, but, like the support rod 25, it can also be made of a permanent magnet.

The diffusion member 7 has a through hole 26 formed at the center thereof, and the support rod 25 penetrates the through hole 26 in a skewered manner. The diffusion member 7 is provided with a female screw hole 27 in a radial direction in a state of reaching the through hole 26 from the outer peripheral surface, and a set screw 28 is screwed into the female screw hole 27.
Therefore, the diffusing member 7 can move in the axial direction of the support rod 25 when the set screw 28 is loosened, and can be fixed at an arbitrary position when the set screw 28 is tightened. Thereby, the position of the diffusing member 7 in the separation cylinder 6 can be freely adjusted in the air flow direction.

  The diffusing member 7 is disposed so as to have a gap K between the inner peripheral surface of the separation cylinder 6, and the gap K is adjusted by adjusting the position of the diffusing member 7 in the axial direction of the support rod 25. Can be enlarged or reduced. In addition, since the support rod 25 is provided in the cylinder center of the separation cylinder 6, and the through-hole 26 for mounting the support rod 25 is formed in the center of the diffusion member 7, the position adjustment of the diffusion member 7 is performed. Even if it performs, the clearance gap K formed between the inner peripheral surfaces of the isolation | separation cylinder 6 will have a uniform space | interval in the circumferential direction.

The range in which the position of the diffusing member 7 is adjusted in the axial direction of the support rod 25 is that the cross-sectional area (denoted as S1) at the position of the maximum diameter of the diffusing member 7 (corresponding to the cylindrical surface 7c in this embodiment) is the diffusing member 7. It has been confirmed by a test that it is preferable to set the clearance K to be wider than the cross-sectional area of the gap K (denoted as S2) between the separation cylinder 6 and the inner peripheral surface of the separation cylinder 6. That is, S1> S2.
As described above, in the separation device 1 of the present invention having the detailed configuration, the diffusing member 7 causes a small vortex or turbulent flow, a radially outward flow, a high-speed flow (in the swirling direction and the axial direction) to the air flow. Etc.), and the chance of contact of the air flow with the inner peripheral surface of the separation cylinder 6 (that is, the filter material 5) is increased. For this reason, the separation efficiency of the filter material 5 having a predetermined particle size or more is also increased. Further, the metal powder can be removed by the support rod 25.

  Using the resin recovery system 2 shown in FIG. 3, a PPS (polyphenylene sulfide) runner mixed with 20% glass fiber is used as a product to be processed, and a powdery material less than 1.4 mm from this product (non-product) The test which collects and removes was conducted. The test conditions were set such that the hole diameter in the filter material 5 (perforated plate) of the separation cylinder 6 was 3 mm, about 450 g of the processed product was charged in 2.5 minutes, and the operation speed was pulverized in 4.5 minutes. did. This test makes it possible to determine whether or not the purity of the granular material (product) taken out throughout the system is high.

As shown in FIG. 4, the trial number 3 is the position of the maximum diameter in the diffusing member 7 (cylindrical surface 7c) by setting the diffusing member 7 to the lowest end position (h = 0) with respect to the support rod 25. sectional area S1 = πφ ^2/4 becomes wider than the cross-sectional area S2 = π (φ + 2b) 2/4-S1 gap K between the and the diffusing member 7 the inner peripheral surface of the separation cylinder 6 (S1> S2 )
On the other hand, in the trial number 4, the diffusion member 7 is raised with respect to the support rod 25 (h = 50 mm), thereby setting a relationship (S1 <S2) in which the cross-sectional area ratio is opposite to the above. It is what I did.

The trial number 1 is a case where neither the support bar 25 nor the diffusion member 7 is used, and the trial number 2 is a case where only the support bar 25 is used and the diffusion member 7 is not used. The test results are shown in Table 1.
4 indicates the dimension between the outer peripheral position of the downstream end surface 7d of the diffusing member 7 and the inner peripheral surface of the separation cylinder 6. In FIG. The dimension a is set and adjusted based on the size of the granular material that passes through the separation cylinder 6 and reaches the extraction portion 4. However, when the position of the maximum diameter (corresponding to the cylindrical surface 7c in the present embodiment) is arranged on the most downstream side of the diffusing member 7 as shown in the example, a = b.

  As is clear from Table 1, it can be seen that the recovery rate of the powdery material (non-product) less than 1.4 mm is the highest in the trial number 3 as the whole system. Moreover, since the permanent magnet is employ | adopted as the support rod 25, metal powders, such as iron powder, can also be removed as the taken-out granular material (product). In short, it can be said that the high purity of the granular material (product) of 1.4 mm or more is the system setting of the trial number 3 (setting of the separation device). Even in the comparison of the separation device alone, trial number 3 has the highest recovery rate of powdery material (non-product) less than 1.4 mm.

  In addition, in the trial number 4, the recovery rate of the powdery material (non-product) less than 1.4 mm is low, and only the result equivalent to the trial number 1 and the trial number 2 in which the diffusion member 7 is not used is obtained. . Thus, the cross-sectional area S2 of the gap K between the diffusing member 7 and the inner peripheral surface of the separation cylinder 6 is made larger than the cross-sectional area S1 at the position of the maximum diameter (cylindrical surface 7c) in the diffusing member 7. Therefore, it can be said that the effect of providing the diffusing member 7 cannot be obtained.

By the way, this invention is not limited to the said embodiment, It can change suitably according to embodiment.
The support rod 25 is not limited to be formed of a permanent magnet, but can be replaced with a magnetized metal or an electromagnet. In addition, it is possible to form a metal, which is not magnetized, from a resin or the like, and it is also possible to integrally form the diffusion member 7 and the support rod 25.

Instead of the support rod 25, the diffusing member 7 may be supported by a rib that protrudes radially inward from the inner peripheral surface of the separation cylinder 6.
The diffusion member 7 is not limited to be formed in a truncated cone shape, but is formed in an inverted truncated cone shape, a disk shape or a cylindrical shape, a drum shape (a shape in which both ends are reduced in diameter and a center is increased in diameter), and the like. It is also possible to do. In addition to forming the downstream end surface 7d perpendicular to the cylinder center of the separation cylinder 6, the downstream end surface 7d is tapered toward the downstream side, has a hemispherical surface, or is recessed toward the upstream side. It may be a surface.

  In the diffusing member 7, the tapered surface 7 b can be formed as an outwardly bulged or internally curved surface, or the cylindrical surface 7 c can be omitted.

It is a side view which crushes and shows partially an embodiment of a separation device concerning the present invention. It is the sectional side view which showed the diffusion member. It is the schematic which showed the resin collection | recovery system which can use a separation apparatus. It is a side view which shows test conditions.

DESCRIPTION OF SYMBOLS 1 Separator 3 Introduction part 4 Extraction part 5 Filter material 6 Separation cylinder 7 Diffusion member 7a Upstream end surface 7b Tapered surface 7c Cylindrical surface 7d Downstream end surface 25 Support rod

Claims (3)

A separation cylinder (6) formed of a filter material (5) tapered toward an extraction part (4) for discharging air from an introduction part (3) that introduces air while swirling, and this separation cylinder (6 ) And a diffusing member (7) which is arranged with a gap (K) in the inside and diffuses the flow of the introduced air .
The diffusion member (7) is mounted on a support rod (25) inserted from the introduction part (3) side into the separation cylinder (6), and a gap (K between the separation cylinder (6) (K) ) Is gradually reduced from the upstream side to the downstream side.
The separation device according to claim 1, wherein the support rod (25) is formed of a permanent magnet, and the diffusion member (7) is provided on the support rod (25) so that the position of the air flow direction can be adjusted . The diffusion member (7) has an outer peripheral surface formed as a tapered surface (7b) spreading from the upstream end surface (7a) to a cylindrical surface (7c) from the tapered surface (7b) to the downstream end surface (7d). The separation apparatus according to claim 1 , wherein the downstream end surface (7d) is formed perpendicular to the cylinder center of the separation cylinder (6) . The cross-sectional area at the position of the maximum diameter of the diffusing member (7) is set wider than the cross-sectional area of the gap (K) with the separation cylinder (6). The separation apparatus according to claim 2.

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