JP5435974B2 - Filter device and granular material processing device - Google Patents

Description

  The present invention relates to a filter that separates fines such as powders and powders fluidized by a gas flow from gas, and in particular, has an excellent effect of preventing foreign matters from being mixed when the collected fines are removed. The present invention relates to a filter device and a granular material processing device.

  Conventionally, in the manufacturing field of pharmaceuticals, cosmetics, foods, etc., various products such as granulation treatment, coating treatment, mixing treatment, and drying treatment are produced for fine products such as powders and powders. The case of doing is well known.

  Moreover, in such a product manufacturing process, a granular material processing apparatus such as a fluidized bed granulating apparatus that performs granulation processing or the like by fluidizing fines by a gas flow is used (for example, Patent Document 1). reference).

  Furthermore, when performing a granulation process etc. using such a granular material processing apparatus, a binder, a coating liquid, etc. are supplied to the fluidized granular material by a spray.

  For this reason, the granular material processing apparatus is provided with a filter device for separating the granular material from the exhaust gas while gas is supplied for fluidization of the granular material.

  This filter device fulfills the function of filtering the granular material fluidized by the gas flow, separating only the gas, and discharging it to the outside of the granular material processing device.

  At this time, the filter filter installed in the filter device is gradually clogged due to the collection of fine substances such as powder and powder accompanying the operation of the powder processing apparatus.

  Therefore, in the granular material processing apparatus, in order to prevent clogging of the filter filter body, fine substances adhering to the filter filter body are removed by appropriately jetting backwashing pulse air into the filter.

  On the other hand, in order to prevent the filter filter body from being unnecessarily swollen by injecting pulse air for backwashing, a filter filter body is known in which a band-like band is wound around and fixed at a plurality of locations on the outer periphery. (See Patent Document 2).

  At this time, both ends of the band and the inner peripheral surface of the band and the outer periphery of the filter body (hereinafter referred to as “band end portions etc.”) are, for example, non-toxic and non-flammable adhesives, mainly ethylene. A method of bonding using a hot-melt adhesive such as vinyl acetate copolymer, polyolefin copolymer, polyamide, or synthetic rubber is often used.

  The hot melt adhesive is applied to the bonding portion in a state where it is heated and melted by using a tool such as a glue gun when bonding the band ends and the like, and is solidified by cooling to complete the bonding.

JP-A-2005-193131 JP 2006-000756 A

  However, in the filter device configured as described above, both ends of the band for fixing the outer periphery of the filter body are bonded (fixed) using a hot melt adhesive.

  Therefore, since the adhesive strength depends on the ambient environment (temperature, humidity, etc.) in which the bonding operation is performed and the amount of hot melt adhesive applied, variation in the adhesive strength is likely to occur, and it is difficult to ensure a certain quality. In addition, there has been a problem that a portion having low adhesive strength is easily peeled off.

  In addition, as described above, the filter filter body of the filter device is appropriately jetted with backwashing pulse air in order to prevent clogging due to adhesion and collection of fine objects.

  Therefore, along with the removal of fine objects by repeated jetting of this backwashing pulsed air, a load to peel off the hot melt adhesive is generated at the bonding location between the both ends of the band. There has also been a problem that a part of the hot melt adhesive has fallen off from the filter body, which may cause peeling.

  Furthermore, when a part of the hot melt adhesive falls off and the removed hot melt adhesive is mixed in the fine matter accumulated in the collection container or the like, in order to reuse the collected powder, It is necessary to remove the melt adhesive.

  Actually, the operation of removing the hot melt adhesive mixed in the recovered powder is very time-consuming and expensive, and the recovered fine matter has to be disposed of.

  Since powders used in the field of high value-added products such as pharmaceuticals, cosmetics, and foods are relatively expensive, there is a need for a filter device that enables reuse of collected fines. It was highly sought after.

  Accordingly, the present invention takes into consideration the above circumstances, prevents the hot melt adhesive that is a foreign substance from being collected in the collected powder, and enables the reuse of the collected powder and the granular material. An object is to provide a processing apparatus.

  The filter device of the present invention comprises a substantially cylindrical filter filter body having a star-shaped cross-sectional shape in a plane projection direction and formed in a pleat shape, plates disposed above and below the filter filter body, A filter body fixing member housed inside, a plurality of fixtures arranged at appropriate intervals in the circumferential direction of the filter filter body and welded and fixed to the outer peripheral side ridges of the filter filter body, And a belt-like band having both ends welded and fastened around the outer periphery of the filter body and supported by the fixture.

  According to the filter device of the present invention, it is possible not only to improve the swelling prevention effect of the filter body, but also to prevent foreign matters from being mixed into the collected powder, and to suppress band displacement and bending. be able to.

  The filter device according to claim 2 is characterized in that both end portions of the band and the outer peripheral side ridge portion of the filter body and the fixture are welded by ultrasonic welding.

  According to the filter device of claim 2, by using ultrasonic welding as a welding method, not only can the welding area be kept to a minimum and the pain of the filter filter body can be reduced, but also each joining site The bonding strength of the filter can be ensured strongly, and the cleaning performance of the filter body can be improved.

  The filter device according to a third aspect is characterized in that the fixing member is formed with a recess opened in an outer peripheral direction so as to engage the band or a slit through which the band passes.

  According to the filter device of the third aspect, the band can be positioned more reliably, and the occurrence of band displacement and bending and the band dropout can be suppressed.

  The filter device according to claim 4, wherein the fixing tool is folded in two so as to protrude in the same direction as the outer peripheral side peak portion, and both edge portions along the ridge line direction and the outer peripheral side peak portion are welded. It is characterized by being.

  According to the filter device of claim 4, by fixing the fixture in a folded shape, not only can the fixture be welded in a state where it is placed on the outer peripheral side peak portion of the filter body, but also the welding work In addition, the fixing part can be welded along the outer peripheral side peak part of the filter body, and it is easy to increase the welding area and secure the bonding strength, and to reduce the size of the fixing tool. Can also contribute.

  Moreover, the granular material processing apparatus of this invention has predetermined | prescribed gas which was introduce | transduced from the substantially cylindrical granulation cylinder which has arrange | positioned the filter apparatus in any one of Claim 1 thru | or 4, and was purified from the blower. An air supply duct that fluidizes the powder by supplying it into the granulation cylinder after adjusting the temperature, and exhausting the gas supplied into the granulation cylinder to the outside after passing through the filter device And an exhaust duct.

  According to the granular material processing apparatus of the present invention, it is possible to recycle relatively expensive recovered powder used in the field of manufacturing and producing high value-added products such as pharmaceuticals, cosmetics, and foods. Can contribute to cost merit.

  The filter device of the present invention can prevent the hot melt adhesive, which is a foreign substance, from entering the collected powder, and can reuse the collected powder.

It is explanatory drawing of the granular material processing apparatus to which the filter apparatus which concerns on one Embodiment of this invention is applied. It is explanatory drawing of the filter apparatus which concerns on one Embodiment of this invention. 1 is an external perspective view of a filter device according to an embodiment of the present invention. It is a perspective view of the principal part of Example 1 in the filter apparatus which concerns on one Embodiment of this invention. It is a perspective view of the principal part of Example 2 in the filter apparatus which concerns on one Embodiment of this invention.

  Next, an embodiment according to the filter device of the present invention will be described with reference to the drawings by applying it to a powdery particle processing apparatus for pharmaceuticals, cosmetics or foods.

The following embodiments are preferred specific examples of the present invention and may have various technically preferable limitations. However, the technical scope of the present invention is not limited to the description of the present invention. As long as it is not limited to these embodiments.
FIG. 1 is an explanatory view of a granular material processing apparatus to which a filter device according to an embodiment of the present invention is applied, FIG. 2 is an explanatory view of a filter device according to an embodiment of the present invention, and FIG. It is an external appearance perspective view of the filter apparatus which concerns on a form.

  In FIG. 1, a granular material processing apparatus 11 communicates with a substantially cylindrical granulation tube 12 having a reverse truncated cone portion 12b expanding upward from a bottom portion 12a, and a bottom portion 12a of the granulation tube 12. A plurality of air ducts 13 that are suspended and fixed via an air supply duct 13 that communicates with the upper portion 12c of the granulation cylinder 12 and a partition plate 15 that is provided closer to the interior upper side of the granulation cylinder 12. A pair of filter devices 16, 16 in the form, a porous plate 17 disposed on the bottom 12 a of the granulation cylinder 12, a spray nozzle 18 disposed between the filter devices 16, 16 and the porous plate 17, and a partition And a pulsed air supply pipe 19 piped above the plate 15.

  Inside the air supply duct 13, a cleaning filter 20 disposed on the upstream side in the air supply direction and a heat exchanger 21 disposed on the downstream side in the air supply direction with respect to the cleaning filter 20 are disposed. Gas is introduced from a blower that stands for. The gas introduced into the air supply duct 13 is cleaned by the cleaning filter 20, then heated or cooled by the heat exchanger 21, adjusted to a predetermined temperature, and then passed through the porous plate 17. Then, it is supplied to the inside of the granulation cylinder 12 to fluidize the raw material powder.

  The exhaust duct 14 discharges the gas supplied to the inside of the granulation cylinder 12 and flowing to the upper part 12c of the granulation cylinder 12 through the filter devices 16 and 16 to the outside of the cylinder.

  The partition plate 15 is formed in a substantially disc shape, and partitions the granulation tube 12 up and down by fixing the periphery of the partition plate 15 in contact with the inner surface of the granulation tube 12. Further, the partition plate 15 is provided with blow-in holes 15a, 15a for pulse air (compressed air) for wiping off, facing the upper surfaces of the filter devices 16, 16. One or more blow holes 15a, 15a are formed in a narrower range than the upper surfaces of the filter devices 16, 16.

  Although two filter devices 16 and 16 are installed in the present embodiment, the number of the filter devices 16 and 16 may be one or more than two. In order to enhance the filter function, it is preferable to install a plurality of filter devices 16 and 16. Further, the filter devices 16 and 16 are tightly fixed to the partition plate 15 with mounting bolts 23 via mounting brackets 22.

  Further, although not shown, the lower end of the central axis of the retainer is passed through a hole provided in the center of the lower plate of the filter devices 16 and 16 through a retainer (mounting bracket) fixed to the partition plate 15, and then screwed. It can also be tightly fixed by stopping.

  The spray nozzle 18 is connected to a liquid feed pump (not shown), and sprays a binder liquid, a coating liquid, or the like toward the lower inside of the granulation cylinder 12. As a result, the binder liquid or the like is supplied to the granular material fluidized by the gas flow supplied from the air supply duct 13 through the perforated plate 17 and supplied into the granulating cylinder 12. Granulation treatment and coating treatment can be performed.

  The pulse air supply pipe 19 supplies pulse air to the inside of the granulation cylinder 12 from a pulse air supply source (not shown). The pulse air supply pipe 19 is connected to the valve 24 arranged outside the granulation cylinder 12 and the blowing holes 15a and 15a of the partition plate 15. A pair of pulse jet nozzles 25, 25 for injecting pulsed air toward them.

  The pair of pulse jet nozzles 25, 25 sprays pulsed air (compressed air) at an appropriate time interval inside the filter devices 16, 16, and wipes off the particles adhering to the filter devices 16, 16. Filter. The filtered gas passes through the exhaust duct 14 from the suction hole of the partition plate 15 and is discharged to the outside.

  Next, details of the filter devices 16 and 16 according to an embodiment of the present invention will be described. In the following description, since the filter devices 16 and 16 have the same configuration, only one filter device 16 will be described.

  As shown in FIGS. 2 and 3, the filter device 16 is provided between a pair of upper and lower plates 26 and 27 and the upper and lower plates 26 and 27 and has a star-shaped cross section in the plane projection direction as a whole. And a filter filter 28 formed in a substantially pleated cylindrical shape, a rubber packing 29 provided on the upper surface of the upper plate 26, and disposed between the filter filter 28 and the upper and lower plates 26, 27. And a pair of upper and lower bands 32 and 32 attached to the outer periphery of the filter body 28 via a plurality of fixtures 31... ing.

  The upper plate 26 and the lower plate 27 are formed of a synthetic resin material such as ABS, and close the upper and lower sides of the substantially cylindrical filter filter body 28. Further, the upper plate 26 is formed with an opening portion 26a for performing suction during operation and blowing in pulsed air during removal.

  The filter body 28 is made of spunbond (a filter obtained by heat-bonding long fibers). The filter body 28 is not limited to a star-shaped and pleated substantially cylindrical shape, but may be a simple cylindrical shape.

  The packing 29 is located between the upper plate 26 and the partition plate 15, and prevents the granular material from leaking into the exhaust duct 14 by bringing the upper plate 26 into close contact with the partition plate 15.

  The cage 30 that is a filter body fixing member is made of, for example, a punching metal made of stainless steel having a thickness of 1 mm or less and an aperture ratio of about 50%. The shape of the cage 30 is a substantially cylindrical shape, has substantially the same length (height) as the filter filter body 28, and is housed inside the filter filter body 28. Is fixed by a filler such as silicon. The cage 30 may be made of a material other than iron such as stainless steel (for example, resin).

  A plurality of fixtures 31 are arranged at equal intervals in the circumferential direction of the filter body 28 (for example, five locations). Note that the number of the fixtures 31 can be appropriately selected depending on the diameter of the filter body 28. Further, for example, as shown in FIG. 4, each fixing tool 31... Has a recess 31 a that opens in the outer circumferential direction so as to engage with the bands 32, 32, or as shown in FIG. 5, the bands 32, 32. A slit 31b through which is penetrated. At this time, it is preferable that the recess 31a or the slit 31b has a dimension that does not cause backlash between the recess 31a or the slit 31b in consideration of the width and thickness of the bands 32 and 32. Further, by setting the depth of the recess 31a and the position where the slit 31b is formed near the outer periphery of the filter filter body 28 with the fixtures 31 attached to the filter filter body 28, the inner periphery of the bands 32, 32 is set. The surface can be brought into close contact with the outer peripheral surface of the filter body 28. In addition, when the recessed part 31a is formed in the fixing tool 31 ..., the winding workability | operativity of the bands 32 and 32 is improved. Further, when the slits 31b are formed in the fixtures 31 ..., it is possible to prevent the bands 32, 32 from falling off the fixtures 31 ... including when the bands 32, 32 are wound. Since a plurality of fixtures 31 are arranged, it is possible to use a mixture of fixtures 31 provided with recesses 31a and fixtures 31 formed with slits 31b. Furthermore, the material of the fixtures 31 is a woven fabric made of polyester (uses a food hygiene law compliant product), and its thickness is about 0.5 to 1.5 mm. In addition, the fixtures 31 are placed on the outer peripheral side peak portion of the filter filter body 28 in a state of being folded in two so as to protrude in the same direction as the outer peripheral side peak portion of the filter filter body 28, and then at least in the ridge line direction. Both edge parts along the outer periphery and the outer peripheral side peak part are welded. In the present embodiment, the filter 31 is welded to the filter filter 28 by an ultrasonic welder across the entire peripheral edge of the fixture 31. Therefore, by fixing the fixing device 31 in half, the welding operation can be easily performed in a state where the fixing device 31 is placed on the outer peripheral side peak portion of the filter body 28, and the welding area can be ensured widely and firmly. A simple joint structure can be secured. Further, when welding the fixtures 31 to the outer peripheral side ridges of the filter filter 28, ultrasonic welding, which is a processing technique that instantaneously melts and joins joints with fine ultrasonic vibration and pressure, is employed. Therefore, if the same material is welded, the strength can be ensured to a level close to the strength of the base material. Further, it is difficult to be affected by the environment around the work place (temperature, humidity, etc.), and it becomes possible to perform stable welding work.

  The material of the bands 32 and 32 is a woven fabric made of polyester (using a food hygiene law compliant product), and preferably has a width of 20 to 30 mm and a thickness of about 0.5 to 1.5 mm. In addition, two bands 32 and 32 are arranged at an appropriate interval above and below the filter body 28. Accordingly, the above-described fixtures 31 are also arranged at appropriate intervals above and below the filter body 28. At this time, the upper and lower two fixtures 31 are not joined to the outer periphery of the same filter filter body 28 by shifting the upper and lower sides with respect to the outer periphery direction of the filter filter body 28, and the outer periphery side of the filter filter body 28. The peak strength can be secured. In addition, the number of the bands 32 and 32 can be suitably used according to the full length (height) of the filter apparatuses 16 and 16. Further, both ends of the bands 32 and 32 are secured by ultrasonic welding after securing a lapping margin of about 5 to 10 mm and bending the lapped portions toward the inner side of the filter body 28 ( (See FIG. 4). In addition, the wrap margins of both ends of the bands 32 and 32 may be similarly secured about 5 to 10 mm, and may be fastened by ultrasonic welding in a state where the lap portions are overlapped on the inside and outside (see FIG. 5).

  In the above configuration, when the filter devices 16 and 16 of the present invention are attached to the powder processing device 11 and then blown off with air to prevent clogging of the filter filter 28, In addition, the bands 32 and 32 wound around the outer periphery of the filter filter 28 and the joints between the bands 32 and 32 and the filter filter 28 are subjected to a load in a direction in which the filter filter 28 tends to swell.

  At this time, since both ends of the bands 32 and 32 of the present invention and the filter filter 28 and the fixtures 31 are joined by ultrasonic welding without an adhesive, peeling and dropping of these joined parts are suppressed. In addition to this, it is possible to prevent foreign substances from being mixed into the recovered powder deposited on the bottom 12a of the granulation cylinder 12.

  By the way, in the filter devices 16 and 16 of the present invention, for the purpose of hygiene and the purpose of reusing the collected powder deposited on the bottom portion 12a of the granulation tube 12, the standards of GMP (Good Manufacturing Practice) and the Food Sanitation Law are used. Although a suitable material is used, the material can be appropriately used depending on the purpose of use.

  In addition, the filter devices 16 and 16 according to the present invention are not limited to the above-described powder processing apparatus 11, and can be applied to, for example, a dust collector used for general dust collection applications. Can be diverse.

DESCRIPTION OF SYMBOLS 11 ... Granules processing apparatus 12 ... Granulation cylinder 13 ... Air supply duct 14 ... Exhaust duct 15 ... Partition plate 16 ... Filter apparatus 26 ... Upper plate 26a ... Opening part 27 ... Lower plate 28 ... Filter filter 30 ... Cage ( Filter body fixing member)
31 ... Fixing tool 31a ... Recess 31b ... Slit 32 ... Band

Claims (5)

  A substantially cylindrical filter filter formed in a star-shaped cross section in a plane projection direction and formed in a pleat shape, plates disposed above and below the filter filter, and a filter housed inside the filter filter A fixing member, a plurality of fixtures arranged at appropriate intervals in the circumferential direction of the filter filter body and welded and fixed to an outer peripheral side peak portion of the filter filter body, and a ring around the outer periphery of the filter filter body A filter device comprising: a band-like band which is mounted and supported by the fixture and whose both ends are welded and fastened together.   2. The filter device according to claim 1, wherein both ends of the band and the outer peripheral side crest of the filter body and the fixture are welded by ultrasonic welding.   3. The filter device according to claim 1, wherein the fixing device is formed with a recess opened in an outer peripheral direction so as to engage the band or a slit through which the band passes.   The fixing tool is folded in half so as to protrude in the same direction as the outer peripheral side ridge, and both edge portions along the ridge line direction and the outer peripheral side ridge are welded. The filter device according to claim 1.   A substantially cylindrical granulation cylinder in which the filter device according to any one of claims 1 to 4 is disposed, and a gas introduced from a blower and cleaned to a predetermined temperature, and then adjusted to a predetermined temperature. An air supply duct for supplying and fluidizing the granular material, and an exhaust duct for discharging the gas supplied into the granulation cylinder to the outside after passing through the filter device. A granular material processing apparatus.

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