JP4932858B2 - Particulate matter removal device - Google Patents

Description

The present invention, resin powder adhered to granules of resin pellets or the like, to a fine dividing SaSo location of granules to remove dust and other fines.

  For example, when supplying resin pellets of molding raw materials to a resin molding machine, it is necessary to first remove dust and other fine powders adhering to the resin pellets with a fine powder removing device. Conventionally, this fine powder removal device employs a screen selection method (Patent Document 1), a flow type air cleaning method (Patent Documents 2 and 3), and a swirl type air cleaning method. (Patent Document 4).

  The fine particle removal device of the sieve selection method arranges the inclined separation plates formed in a lattice shape in a zigzag shape in the vertical direction, and the blow type static electricity removal device on the upper side facing each inclined separation plate. A fine powder collecting device is arranged below each plate. Then, the resin pellets are screened when the resin pellets flow on the inclined separator while blowing ionized air to the resin pellets that flow downward on the inclined separator from the static eliminator. The fine powder adhering to is removed, and the fine powder that has passed through the inclined separation plate is collected by a fine powder collecting device.

  The flow-down type air-cleaning type fine powder removal device has a guide plate and an inclined separation plate arranged alternately in a vertical direction on the lower side of the static electricity removal device, and an opening on the downstream side of each inclined separation plate. A fine powder collecting device is arranged on each side. The static electricity removing device removes static electricity from the resin pellets, and then the subsequent resin pellets flow down from the induction plate onto the inclined separation plate and are introduced from the downstream opening and flow in the direction opposite to the resin pellets. By washing the resin pellets, fine powder is removed.

  Further, the swirling air cleaning type fine powder removing device has an inverted conical separation screen disposed in a vertical cylindrical body in which a supply port is provided in the upper portion and a recovery port is provided in the lower portion in a tangential direction. Air that passes through the separation screen while supplying resin pellets by air conveyance and spirally swirling the resin pellets from the upper side to the lower side along the inner periphery of the separation screen by the centrifugal force accompanying the inertial force. The resin pellets are air-washed by a flow to remove fine powder of the resin pellets.

JP-A-8-39550 JP-A-10-620 Japanese Patent Laid-Open No. 2002-282791 Japanese Patent Laid-Open No. 2007-216118

  The conventional fine powder removing device has the disadvantages that the fine powder removal efficiency is poor, the work efficiency is lowered, and the entire device is very large regardless of whether the sieve sorting method or the air cleaning method is used.

  In other words, in the case of the sieve sorting method, the resin pellets flowing down on the inclined separation plate are blown with ionized air from an electrostatic removal device to remove static electricity from the resin pellets, and the resin by the sieving action of the inclined separation plate. The fine powder adhering to the pellet is removed. However, since screening is basically performed, the removal efficiency of the fine powder is poor and the work efficiency is lowered, and in order to sufficiently remove the fine powder, it is necessary to provide inclined separators in multiple stages in the vertical direction. There is a drawback that the whole apparatus becomes large.

  On the other hand, in the case of the down-flow type air cleaning method, the resin pellets fall from the guide plate to the inclined separation plate, and while the resin pellets flow along the inclined separation plate, the fine powder adhering to the surface is removed by air. To separate and remove. However, although the air flows in the opposite direction with respect to the resin pellets flowing on the inclined separator, the flow velocity of the air is increased at the position where the lower end of the guide plate is closest to the inclined separator, Since the air contact with the resin pellets on the separation plate is poor, there is a disadvantage that the efficiency of removing fine powder is poor and the work efficiency is lowered.

In addition, there is a guide plate for guiding the resin pellets to the upstream side of the tilt separation plate on the upper side of each tilt separation plate. Therefore, in order to sufficiently remove fine powder, the tilt separation plate is arranged in multiple stages in the vertical direction. Combined with the necessity of providing, there is a drawback that the entire apparatus is enlarged in the same manner as the sieve selection method.

In the case of the swirl type air cleaning method, the resin pellets are supplied to remove fine powder while rotating the resin pellets spirally along the separation screen by centrifugal force when supplied on the separation screen by air conveyance. If the amount is small, fine powder can be removed from the resin pellet, but if the supply amount is large, the resin pellet does not rotate and slides along the inclined surface of the separation screen. is there. For this reason, even in the case of the swivel type, there is a disadvantage that the entire apparatus becomes large, such as enlarging the separation screen, but also increasing the air conveying force sufficiently so that the resin pellets are reliably swirled on the separation screen. In view of such conventional problems, the present invention makes it possible to easily and downsize the entire apparatus, and to efficiently remove resin powder, dust and other fine powder adhering to the granular material efficiently and with high accuracy. an object of the present invention is to provide a dividing SaSo location.

The particulate matter removing apparatus according to the present invention includes a vertical cylindrical body 6 having an inlet portion 14 for particulate matter P containing fine powder at a lower portion and an outlet portion 13 for dust-containing air at an upper portion, and the vertical cylindrical body. 6 is formed between the vertical cylindrical body 6 and the vertical cylindrical body 6 in which the ascending narrow channel 7 rises, and is separated from the fine powder and guides the granular material P falling from the upper side. In the mold cylinder 6, a separation chamber 9 provided on the upper side of the bottleneck forming cylinder 8 and having a passage cross-sectional area larger than that of the rising bottlenose 7, and with respect to the granular material P rising in the rising bottleneck 7 In order to remove static electricity by supplying static elimination air to the granular material P falling in the narrow channel forming cylinder 8 from the ascending narrow channel 7 through the opening 43 of the narrow channel forming cylinder 8, respectively. The discharge air supply port 25 is provided in the vertical cylinder 6.

The vertical cylindrical body 6 and the bottleneck forming cylinder 8 are cylindrically arranged substantially concentrically. The inside of the bottleneck forming cylinder 8 serves as a storage tank 3, and the outlet 22 is opened and closed in the storage tank 3. The thing provided with the opening-and-closing valve 23 to perform may be sufficient. The narrow path forming cylinder 8 has a tapered portion 21 at the bottom, on the outer periphery of the tapered portion 21, the dispersion particle-like material P you flows from the inlet 14 to substantially the entire circumference of the lower end of the rising bottleneck 7 An annular passage 24 to be provided may be provided. That between the outlet portion 13 and the separation chamber 9, was placed an obstacle 26 for contact with the particle-like matter P you try to enter into the outlet portion 13 to drop to the narrow path formed cylindrical body 8 But you can.

Wherein the particle-like material P The charge eliminating air supply port 25 for supplying neutralizing air to the vertical tubular body 6 in the upper side of the reservoir level L of the narrow path formed cylindrical body 8 circumferentially said longitudinal-shaped tubular body 6 plurality provided, the corresponding a bottleneck forming cylinder 8 to the inside of the static eliminator air supply opening 25 a plurality of the openings 43 provided in the bottleneck of the upper end of the forming cylinder 8 and the opening 43 the vertical tubular member 6 may be located in the middle of the outlet portion 13.

In the present invention, it can be simple and miniaturized instrumentation置全body, moreover resin powder adhered to the granules, wherein dust and other advantages fines can remove be efficiently efficiently with high precision.

It is a schematic diagram of the fine powder removal apparatus which shows the 1st Example of this invention. It is a longitudinal cross-sectional view of the separation means. It is a cross-sectional view of the separation means. It is explanatory drawing of the flight state of the resin pellet. It is a longitudinal cross-sectional view of the isolation | separation means which shows the 2nd Example of this invention. It is a cross-sectional view of the separation means. It is a longitudinal cross-sectional view of the isolation | separation means which shows the 3rd Example of this invention. It is a longitudinal cross-sectional view of the isolation | separation means which shows the 4th Example of this invention. It is a longitudinal cross-sectional view of the isolation | separation means which shows the 5th Example of this invention.

  Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 illustrate a first embodiment when the present invention is adopted in a fine powder removing apparatus for resin pellets. FIG. 1 shows an outline of a fine powder removing device for resin pellets arranged at the front stage of a resin molding machine, and this fine powder removing device has a supply means 1, a separation means 2, a storage tank 3, and a dust collecting device as shown in FIG. A means 4 and a suction means 5 are provided. The suction means 5 sucks the lower side of the separation means 2 and feeds the resin pellets P (see FIG. 4) supplied from the supply means 1 by a fixed amount by air conveyance. The separation means 2 separates the resin pellets P and the fine powder adhering to the surface thereof, and the resin pellets P are stored in the storage tank 3, and the fine powders are collected by the dust collection means 4 and cleaned. It has become.

  The supply means 1, the separation means 2, the dust collection means 4, and the suction means 5 may be provided in a closed circuit shape or in an open circuit shape. The suction means 5 may be provided on either the upper side or the lower side of the separating means 2.

  Separation means 2 is for cleaning the resin pellet P by air washing to separate the resin pellet P into fine powder adhering to the surface and the like. As shown in FIGS. A cylindrical body 6, a narrow channel forming cylinder 8 that is provided substantially concentrically in the vertical cylindrical body 6 and forms a rising narrow path 7 in which the resin pellet P rises between the vertical cylindrical body 6, and a vertical type A separation chamber 9 provided on the upper side of the bottleneck forming cylinder 8 in the cylinder 6 is provided, and is mounted on a support base 10.

  The vertical cylinder 6 has a top wall 11 and a bottom wall 12 at both upper and lower ends, an outlet portion 13 near the lower side of the top wall 11, and an inlet portion 14 near the upper side of the bottom wall 12, respectively. It is provided substantially perpendicular to the body 6. The outlet portion 13 is connected to the suction means 5 and the dust collecting means 4 via a flexible hose, and the inlet portion 14 is connected to the supply means 1 via a flexible hose.

  The vertical cylinder 6 includes a lower cylinder 15 having a length of approximately the lower half, an upper cylinder 16 that is shorter than the lower cylinder 15, and a transparent inspection cylinder 17 interposed between the lower cylinder 15 and the lower cylinder 15. The flanges 15a and 16a of the lower cylinder body 15 and the upper cylinder body 16 are detachably coupled to each other by a plurality of bolts 18 in the circumferential direction. The lower cylinder 15 and the upper cylinder 16 are made of an opaque material such as stainless steel. The inspection cylinder 17 is for inspecting the separation state of the resin pellets P and fine powder in the separation chamber 9 from the outside, and is made of a wear-resistant material such as glass, and has flanges 15a and 16a via packings 19 at both upper and lower ends. Is intervening.

  The bottleneck forming cylinder 8 has a cylindrical shape and is disposed substantially concentrically at the lower portion in the vertical cylinder 6, and the entire circumferential direction between the bottleneck forming cylinder 8 and the vertical cylinder 6 is provided. An annular ascending channel 7 is formed over the circumference. Even when the resin pellet P rises due to the air flow and the resin pellet P enters the separation chamber 9 and the flow velocity decreases, the ascending channel 7 rises from the substantially vertical center of the separation chamber 9 to the upper height. In order to generate an inertial force enough to fly, the passage cross-sectional area is narrowed to give the resin pellet P a sufficient rising speed.

  The bottleneck forming cylinder 8 also serves as the storage tank 3. The storage tank 3 opens to the lower side of the separation chamber 9 and receives and stores the resin pellets P separated from the fine powder in the separation chamber 9. Further, a tapered portion 21 is provided at the lower portion of the storage tank 3 that is the bottleneck forming cylinder 8. The lower portion of the tapered portion 21 protrudes below the bottom wall 12 of the vertical cylindrical body 6, and an opening / closing valve 23 that opens and closes the extraction port 22 is provided at the lower end portion thereof. The on-off valve 23 is for closing the take-out port 22 during the cleaning of the resin pellet P.

  The upper side of the tapered portion 21 of the storage tank 3 corresponds to the inlet portion 14 on the upper side of the bottom wall 12, and the resin pellet P flowing from the inlet portion 14 is placed on the outer periphery of the tapered portion 21 at the lower end of the rising bottle 7. An annular passage 24 is provided to be distributed over substantially the entire circumference on the side.

  In addition, although the outer periphery of the taper part 21 is being fixed to the bottom wall 12 of the vertical cylinder 6, the storage tank 3 may have another fixed structure. The storage tank 3 may be provided on the support base 10 so as to be detachable from the vertical cylinder 6. It is desirable that the lower end portion of the vertical cylinder 6 is substantially hermetically sealed such that the tapered portion 21 of the storage tank 3 is fitted into the bottom wall 12 of the vertical cylinder 6 in a hermetically sealed manner.

  The separation chamber 9 has a sufficiently large passage cross-sectional area as compared with the ascending bottleneck 7 and reduces the flow velocity of the air flow flowing from the ascending bottleneck 7 into a heavy resin pellet P and a light weight fine powder. It separates, the resin pellet P is dropped to the lower storage tank 3, and fine powder is sent to the dust collecting means 4 from the exit part 13 as dust-containing air by an air flow. Corresponding to the lower end of the separation chamber 9, the vertical cylinder 6 is provided with a static elimination air supply port 25. The static elimination air is supplied from the static elimination air supply port 25 to the separation chamber 9, and the static electricity of the resin pellet P is discharged. The charge is removed so that the resin pellets P and fine powder in the separation chamber 9 can be easily separated.

  At the upper part of the vertical cylinder 6, an obstacle 26 is provided between the separation chamber 9 and the outlet part 13 where the resin pellets P flowing toward the outlet part 13 come into contact. The obstacle 26 is constituted by a conical net 27 that spreads downward. A peripheral edge on the lower end side is fixed to the lower inner periphery of the upper cylindrical body 16, and a peripheral edge on the upper end side is fixed to the top wall 11.

  A detecting means 28 for detecting the storage level L of the resin pellet P in the storage tank 3 is provided in the vertical cylinder 6. The detection means 28 is a motor 29 disposed substantially at the center on the top wall 11 of the vertical cylinder 6 and is driven by the motor 29 and disposed vertically at a substantially central portion in the vertical cylinder 6. A rotary shaft 30 and a rotary blade 31 fixed to the lower end of the rotary shaft 30 and arranged at the upper part in the storage tank 3 are provided, and the rotary blade 31 is rotated by the motor 29 via the rotary shaft 30. When the resin pellet P in the storage tank 3 accumulates to a predetermined storage level L and a load exceeding a predetermined value is applied to the rotor blade 31, the motor 29 is stopped and the resin pellet P in the storage tank 3 is transferred to the rotor blade 31. It is detected that the reservoir level L corresponding to is accumulated.

  When supplying the resin pellets P of the molding raw material to the resin molding machine, the resin pellets P are first washed with air to remove dust and other fine powder adhering to the surface. When the resin pellet P is washed with air, the opening / closing valve 23 is closed and the suction means 5 is operated, and air flows through a path including the pellet supply means 1, the separation means 2, and the dust collection means 4 by the suction action of the suction means 5. Then, the resin pellets P are supplied from the supply unit 1 to the separation unit 2 by air conveyance, and the separation unit 2 cleans the resin pellets P with air to separate them from fine powders. The washed resin pellets P are stored in the storage tank. 3, dust-containing air containing fine powder is sent to the dust collecting means 4 for dust collection.

  When the suction means 5 is activated, the resin pellet P supplied from the supply means 1 is conveyed to the separation means 2 by the air flow in order to suck the air in the vertical cylinder 6 from the outlet portion 13. In the separation means 2, the resin pellets P flow from the inlet portion 14 into the annular passage 24 on the lower end side of the vertical cylindrical body 6 together with the air flow. After being evenly dispersed, it rises rapidly at a sufficient flow rate from the lower end to the upper end along the entire circumference of the ascending bottleneck 7.

  When the separation chamber 9 is entered from the upper end of the ascending bottleneck 7, the cross-sectional area of the separation chamber 9 becomes larger than that of the ascending bottleneck 7, so that the flow velocity of the air flow in the separation chamber 9 is reduced. Then, the resin pellet P that has flowed into the separation chamber 9 along the entire circumference of the ascending bottleneck 7 flies to approximately the center or higher in the vertical direction from the outer peripheral portion of the separation chamber 9 toward the center as shown in FIG. After that, it falls downward to the storage tank 3 side. The fine powder is sent to the outlet 13 by an air flow.

  As a result, the resin pellet P and the fine powder can be efficiently separated, and the resin pellet P can be reliably washed with air. The washed resin pellets P are stored in the storage tank 3 below the separation chamber 9, and the fine powder is sent as dust-containing air to the dust collecting means 4 to be collected.

  If there is a variation such as a decrease in the amount of resin pellets P flowing into the separation chamber 9, the resin pellets P will attempt to pass over the separation chamber 9 and pass to the outlet portion 13. After the resin pellet P collides with the conical mesh 27, it falls into the lower storage tank 3 in the separation chamber 9. Therefore, the resin pellets P are not sent to the dust collecting means 4 through the separation chamber 9.

  During the cleaning of the resin pellet P, the rotating blade 31 is rotated by the motor 29. And if the level of the resin pellet P in the storage tank 3 rises and the load concerning the rotary blade 31 becomes large, the motor 29 will stop and the resin pellet P in the storage tank 3 will be in the predetermined storage level L. This is detected by the detecting means 28.

  Thus, the resin pellet P containing fine powder is caused to flow into the separation chamber 9 from the ascending channel 7 by the air flow, and the resin pellet P and the fine powder are separated in the separation chamber 9 according to the size of the weight. The resin powder, dust and other fine powder adhering to the surface of the resin pellet P can be efficiently and highly accurately removed while the size of the resin pellet P is simple and small.

  In particular, the vertical cylindrical body 6 and the inner narrow passage forming cylindrical body 8 form a rising narrow passage 7, and the resin pellet P is allowed to flow into the separation chamber 9 from the upper end of the rising narrow passage 7. 8 can flow in a cylindrical shape from its outer peripheral side. Therefore, the resin pellets P can easily come into contact with the air flow, and the resin pellets P can be efficiently cleaned with air.

  Moreover, the inside of the bottleneck forming cylinder 8 is used as the storage tank 3, and the resin pellet P separated from the fine powder in the separation chamber 9 is directly received and stored in the storage tank 3 in the bottleneck forming cylinder 8 below the separation chamber 9. Therefore, the space in the bottleneck forming cylinder 8 can be used effectively, and the structure can be simplified compared to the case where the bottleneck forming cylinder 8 and the storage tank 3 are provided separately, and waste of members can be prevented.

  In addition, an annular passage 24 is provided at the lower end of the vertical cylinder 6 so that the resin pellets P containing fine powder entering from the inlet portion 14 are dispersed in the annular passage 24 over substantially the entire circumference of the ascending channel 7. Even if the passage cross-sectional area of the narrow path 7 is reduced, the resin pellets P can be uniformly dispersed on substantially the entire circumference of the rising narrow path 7. Moreover, since the annular passage 24 is formed using the outer periphery of the tapered portion 21 of the storage tank 3, the vertical cylinder 6 can be formed into a substantially cylindrical shape.

  5 and 6 exemplify a second embodiment of the present invention, in which an obstacle 26 arranged in the upper part of the vertical cylinder 6, particularly in the upper cylinder 16, is constituted by a rod-like obstacle member 33. Is illustrated. The obstruction member 33 includes a plurality of obstruction members 33 arranged in parallel at substantially equal intervals in the direction substantially perpendicular to the outlet portion 13, and a plurality of obstruction members 33 are formed vertically on the opening side below the outlet portion 13 of the upper cylindrical body 16. Is provided. The upper and lower obstacle members 33 are arranged in a staggered manner so that the upper obstacle member 33 is positioned between the lower adjacent obstacle members 33.

  The upper cylinder 16 has a diameter larger than that of the lower inspection cylinder 17 so that the cross-sectional area of the upper cylinder 16 is not reduced by the obstruction member 33, and the lower flange 16 a is connected to the upper flange 17 a of the inspection cylinder 17. It is detachably fixed with a bolt 34 or the like. A tapered guide surface 17 b is provided on the inner periphery of the upper end of the inspection cylinder 17 so that the resin pellets P that have collided with the obstacle member 33 and dropped can be easily slid into the storage tank 3.

  In this embodiment, the upper cylinder 16 is detachable from the lower inspection cylinder 17, but the upper cylinder 16 only needs to be detachable from the lower cylinder. . The obstruction member 33 may have a round bar shape.

  As described above, the obstacle 26 may be configured by arranging a plurality of obstacle members 33 in a cage shape and providing a plurality of pairs in the vertical direction so that the upper and lower obstacle members 33 are staggered. In this way, since the maze is formed by the obstacle member 33, the passage of the resin pellet P can be almost prevented. Further, since the upper cylindrical body 16 has a large diameter, it is possible to prevent a reduction in the cross-sectional area of the passage even when many obstacle members 33 are arranged close to each other, and the air flow between the obstacle members 33 is accelerated. Nor. Further, when fine powder adheres to the obstacle 26, it can be easily cleaned by removing the upper cylindrical body 16.

  FIG. 7 illustrates a third embodiment of the present invention. In this embodiment, the vertical cylinder 6 and the storage tank 3 are detachably mounted on the support base 10, and the vertical cylinder 6 and the storage tank 3 can be separated as required. The storage tank 3 is composed of a bottleneck forming cylinder 8 side and a tapered portion 21 at the lower end thereof.

  In the bottle forming cylinder 8, a lower end flange 8a is placed on the support base 10, and a tapered portion 21 is fixed to the lower side thereof. The vertical cylindrical body 6 has an enlarged diameter portion 36 formed with an enlarged diameter on the outside, and a flange 37 at the lower end of the enlarged diameter portion 36 is fixed to the flange 8a by a bolt 38 so as to be separable. And the annular channel | path 24 is formed in the inner periphery of the enlarged diameter part 36 above the flange 8a.

  If the vertical cylinder 6 and the storage tank 3 can be separated in this way, even when fine powder or the like adheres to the ascending channel 7 between the vertical cylinder 6 and the storage tank 3, they are separated. This makes it easy to clean. The annular passage 24 can also be formed by providing an enlarged diameter portion 36 that swells outward in a part of the vertical cylinder 6.

  FIG. 8 illustrates a fourth embodiment of the present invention. In this embodiment, a bottleneck forming cylinder 8 is disposed in the lower part of the vertical cylinder 6, and a rising bottleneck 7 is formed between the bottleneck forming cylinder 8 and the vertical cylinder 6. The storage tank 3 is disposed below and away from the vertical cylinder 6, and the resin pellets P separated in the separation chamber 9 are guided to the lower storage tank 3 via the bottleneck forming cylinder 8. ing.

  The bottle forming cylinder 8 has a guide cylinder 39 at a lower portion through a tapered portion 21, and the guide cylinder 39 is detachably fixed on the support base 10 by a nut 40 or the like. In the vertical cylinder 6, a flange 37 at the lower end is detachably fixed to the support base 10 by a bolt 38. The storage tank 3 has a lid 41 fixed to the lower end of the guide cylinder 39 and a tank main body 42 detachably attached to the lower side of the lid 41, and a take-out port is provided below the tank main body 42. 22 and an on-off valve 23 are provided.

  If the bottleneck forming cylinder 8 is arranged in the vertical cylinder 6 and the storage tank 3 is provided outside the vertical cylinder 6 as described above, the storage tank is kept while keeping the diameter of the vertical cylinder 6 relatively small. A sufficient volume of 3 can be secured.

  FIG. 9 illustrates a fifth embodiment of the present invention. In this embodiment, the bottleneck forming cylinder 8 in the vertical cylinder 6 extends above the storage level L of the resin pellet P therein, and the upper end thereof is the outlet level of the storage level L and the dust-containing air. 13 or approximately in the vicinity thereof. The upper side of this bottleneck forming cylinder 8 is a separation chamber 9. The vertical cylinder 6 has a plurality of (for example, two, three, or four in the circumferential direction) static elimination air corresponding to the vicinity of the upper side of the storage level L of the resin pellet P in the bottle forming cylinder 8. The supply port 25 is provided at substantially equal intervals in the circumferential direction, and the opening 43 is provided in the narrow channel forming cylinder 8 so as to face the charge removal air supply port 25. Other configurations are substantially the same as those of the first embodiment.

  In this case, although the fine powder of the resin pellet P is separated and removed by the same action as in the first embodiment, there is an advantage that the fine powder removal efficiency is further improved. This is because the bottle forming cylinder 8 in the vertical cylinder 6 extends greatly upward beyond the storage level L of the resin pellet P, and its upper end position is located approximately in the middle between the storage level L and the outlet portion 13. Therefore, the rising distance when the resin pellet P rises to the separation chamber 9 via the rising bottleneck 7 becomes long, and the falling distance when the raised resin pellet P falls to the storage level L can be increased.

  On the other hand, the vertical cylinder 6 has a plurality of static elimination air supply ports 25 in the circumferential direction corresponding to the upper side of the storage level L, and is open to the bottleneck formation cylinder 8 corresponding to each of the static elimination air supply ports 25. 43, a part of the static elimination air supplied from the static elimination air supply port 25 rises together with the resin pellet P via the ascending bottleneck 7, and the remaining part passes through the opening 43 into the bottleneck forming cylinder 8. The inside of the bottle forming cylinder 8 is raised while countering the resin pellet P that enters and falls from above.

  For this reason, the rising distance and falling distance of the resin pellet P increase, and as the distance increases, the time during which the static elimination air and the resin pellet P are in contact with each other increases, and the static elimination effect of the resin pellet P by the static elimination air is improved. Therefore, there is an advantage that the removal efficiency of the fine powder from the resin pellet P is remarkably improved. Further, since the rising bottleneck 7 becomes longer, the flight of the resin pellet P in the separation chamber 9 when it jumps out from the rising bottleneck 7 to the separation chamber 9 is easily stabilized, and fine powder can be stably removed from the resin pellet P. Can do.

  In this embodiment, there is a static elimination air supply port 25 at the approximate center of the vertical cylinder 6 in the vertical direction. However, if the inlet 14 of the resin pellet P is located near the lower side of the static elimination air supply port 25, The vertical cylindrical body 6 below the inlet 14 may be omitted.

  As mentioned above, although each Example of this invention was explained in full detail, this invention is not limited to these Examples, It can implement in another various aspect. For example, in the embodiment, the suction means 5 is arranged on the downstream side of the separation means 2, and the resin pellet P is pneumatically conveyed to the separation means 2 by the suction action of the suction means 5. A blowing means may be provided on the upstream side of 2, and the resin pellets P may be sent to the separation means 2 by air conveyance.

  In the embodiment, a transparent inspection cylinder 17 is provided in the vertical cylinder 6 so that the separation state of the resin pellets P and fine powder in the separation chamber 9 can be confirmed from the outer periphery of the inspection cylinder 17. The straight cylindrical body 6 may be used without providing the inspection cylinder 17. Further, a viewing window closed by a transparent plate may be provided in a part of the vertical cylindrical body 6 corresponding to the separation chamber 9 so that the viewing can be performed from the viewing window.

  The vertical cylindrical body 6, the bottleneck forming cylindrical body 8, and the storage tank 3 may have a rectangular cylindrical shape in addition to a cylindrical shape. The inlet 14 may be provided tangential to the annular passage 24. The outlet 13 may be provided on the top wall 11 of the vertical cylinder 6. The resin pellet P may be spherical, columnar, or other shapes. Moreover, although each Example has illustrated the fine powder removal apparatus which removes the fine powder of the resin pellet P, it is employable also for the removal of the fine powder adhering to granular materials other than the resin pellet P. FIG.

DESCRIPTION OF SYMBOLS 3 Storage tank 6 Vertical cylinder 7 Ascending bottleneck 8 Narrow channel formation cylinder 9 Separation chamber 13 Outlet part 14 Inlet part 21 Taper part 22 Outlet 23 Open / close valve 24 Annular passage 25 Static elimination air supply port 26 Obstacle P Resin pellet (granular) object)
L Storage level

Claims (5)

  A vertical cylinder (6) having an inlet part (14) of particulate matter (P) containing fine powder in the lower part and an outlet part (13) of dust-containing air in the upper part, and the inside of the vertical cylinder (6) In this way, the ascending channel (7) in which the granular material (P) ascends is formed between the vertical cylindrical body (6) and the granular material (P) separated from the fine powder and falling from the upper side is guided. A body (8), a separation chamber (9) provided in the vertical cylinder (6) above the bottleneck forming cylinder (8) and having a larger passage cross-sectional area than the rising bottleneck (7) The discharge air is supplied to the particulate matter (P) that rises in the ascending bottleneck (7), and the ascent to the particulate matter (P) that falls in the bottleneck forming cylinder (8) The vertical discharge air supply port (25) for supplying static electricity from the narrow path (7) through the opening (43) of the narrow path forming cylinder (8) to remove static electricity is provided in the vertical type. Fines removal apparatus of particulates, characterized in that provided in the body (6). The vertical cylindrical body (6) and the bottleneck forming cylinder (8) are cylindrically arranged substantially concentrically, and the inside of the bottleneck forming cylinder (8) serves as a storage tank (3), and the storage tank The particulate matter removing apparatus according to claim 1 , further comprising an on-off valve (23) for opening and closing the take-out port (22) in (3). The said bottleneck formation cylinder (8) has a taper part (21) in the lower part, and the granular material (P) which flows in from the said inlet part (14) to the outer periphery of this taper part (21) is said ascending bottleneck (7 The fine particle removing apparatus for particulate matter according to claim 1 or 2 , further comprising an annular passage (24) that is dispersed on substantially the entire circumference on the lower end side. Between the separation chamber (9) and the outlet portion (13) to come into contact with the particulate matter (P) entering the outlet portion (13) and fall into the bottleneck forming cylinder (8) The obstacle (26) of this is arrange | positioned, The fine powder removal apparatus of the granular material in any one of Claims 1-3 characterized by the above-mentioned. The static elimination air supply port (25) for supplying static elimination air into the vertical cylinder (6) above the storage level (L) of the particulate matter (P) in the bottleneck formation cylinder (8) A plurality of the vertical cylinders (6) are provided in the circumferential direction, and a plurality of the openings (43) corresponding to the inside of the static elimination air supply port (25) are provided in the bottleneck formation cylinder (8), any bottleneck forming cylinder upper end (8) of claims 1 to 4, characterized in that intermediate is positioned between the outlet portion of the opening (43) and the vertical tubular member (6) (13) An apparatus for removing fines of particulate matter according to any one of the above.

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