JP4734077B2 - Filter cleaning apparatus and filter cleaning method for powder processing apparatus - Google Patents

Description

  The present invention relates to a cleaning technique for a filter mounted on a powder processing apparatus, and more particularly to CIP cleaning (Cleaning in Place) of a filter having a pleated structure.

  In the fields of pharmaceuticals, cosmetics, foods, etc., various products are manufactured by subjecting fine substances such as powders and granules to processing such as granulation, coating, mixing, and drying. In such a process, a granular material processing apparatus such as a fluidized bed granulation coating apparatus that performs processing such as granulation by fluidizing a fine substance by a gas flow is used. In such a granular material processing apparatus, a gas is supplied for fluidizing the granular material, and a filter for separating the granular material from the exhaust gas is provided. The granular material fluidized by the gas flow is filtered by this filter, and only the gas is separated and discharged to the outside of the granular material processing apparatus.

As a filter used for a powder processing apparatus, in order to increase a filtration area, what formed the filter cloth in the shape of a pleat is used in many cases. However, in such a filter, when clogging occurs in the filter medium, the gas flow is hindered, the fluidization of the granular material is hindered, and the processing efficiency is lowered. For this reason, in order to prevent clogging of the filter medium, the fine powder adhering to the filter medium is appropriately removed. The fine powder removal is also called “backwashing”, and is performed by supplying pulsed air in the direction opposite to the fluidized gas flow. For example, when a fluidized gas flow flows from the outside to the inside of the filter, a pulse jet nozzle is arranged inside the filter, and pulse air is ejected from the inside of the filter to the outside. Thereby, the fine powder of the granular material adhering to the collection surface (here outer surface) of a filter is removed, and maintenance of a filter function is achieved.
Japanese Patent No. 3302778

  However, in the case of a pleated filter, the fine powder adhering to the back of the pleat is likely to aggregate, and backwash air is difficult to pass through the back of the pleat, so it is difficult to sufficiently remove the fine powder at the back of the pleat. In particular, if the folds are deeply folded, it is very difficult to remove the fine powder accumulated in the back of the pleats. If there are a large number of pleats per filter, each piece of pleats even if a cleaning nozzle is installed. It was difficult to clean the back. filter. For this reason, when cleaning the filter, it is necessary to remove the filter from the apparatus in a state where fine powder is adhered and to perform cleaning separately outside the apparatus, and there is a problem that CIP cleaning cannot be performed.

  The objective of this invention is providing the filter washing | cleaning apparatus and washing | cleaning method which can wash | clean to the back of a pleat within an apparatus, without removing a filter from a granular material processing apparatus.

The filter cleaning apparatus of the granular material processing apparatus of the present invention is installed in the processing container of the granular material processing apparatus, and has a cylindrical shape provided with a pleat portion formed by bending a filter cloth in a bowl shape on the outer periphery thereof. a cleaning device of the filter, the filter rotation shaft attached to the filter, which is connected filter rotating shaft via the rotary joint, the both filter rotation shaft is mounted rotatably, wherein the processing the filter A filter support shaft that is rotatably suspended in the container, a cleaning nozzle that is installed in the processing container, injects a cleaning liquid from the tangential direction of the filter to the pleat portion, and rotates the filter by the cleaning liquid ; A fluid pressure cylinder that can be accommodated in the filter and can extend and contract the filter support shaft in the vertical direction. Serial with to filter support shaft is moved in the vertical direction, the filter is characterized by moving the processing chamber in a vertical direction.

  In the present invention, a cylindrical filter provided with a pleat part is rotatably disposed in a processing container, and a cleaning liquid is sprayed in a filter tangential direction from a cleaning nozzle installed in the processing container to the pleat part. Since the filter is rotated by this cleaning liquid, the filter can be cleaned while rotating the filter. When the filter rotates, the fine powder collected in the back of the pleat portion is sent to the outer peripheral side together with the cleaning liquid by centrifugal force accompanying the rotation, and the fine powder in the back of the pleat is discharged out of the filter together with the cleaning liquid.

In the filter cleaning apparatus, a plurality of the filters are installed in the processing container, and the cleaning nozzle is disposed at an intermediate position of the filter adjacent to the wall surface of the processing container, and is opposed to the cleaning nozzle in one place. The filters adjacent to each other in the circumferential direction may be rotated in opposite directions by the cleaning liquid ejected to the two filters . For example, when four filters are arranged in the processing container, four washing nozzles are arranged at 90 ° intervals to rotate all four filters in the same direction. However, if a configuration in which adjacent filters are rotated in reverse is used, the cleaning nozzles can be concentrated at two locations. For this reason, piping and a nozzle attachment part are reduced, and cost reduction is achieved. In addition, since the cleaning liquid scattered with the rotation of the filter does not reach the other adjacent cleaning nozzles, contamination of the cleaning nozzles themselves is reduced.

  In the filter cleaning apparatus, the filter support shaft may be installed so as to be movable in the vertical direction, and the filter may be moved in the vertical direction in the processing container as the filter support shaft moves. In this case, the filter support shaft may be installed in the processing container, and at least a part of the filter support shaft may be driven by a fluid pressure cylinder or a winch device accommodated in the filter.

In the filter cleaning device, the filter rotation shaft is fixed to the lower end portion of the filter, and is in contact with the inner periphery of the upper end portion of the filter so that the upper end portion of the filter shakes when the filter rotates. You may arrange | position the anti-blur member which prevents turning. The anti-blur member is provided with a plurality of legs fixed to a top plate installed in the processing container and a ring fixed to the lower end of the legs, and the ring and the legs The part may be inserted into the inner periphery of the filter from the upper end of the filter. On the other hand, the anti-blur member may have an 8-shaped shape whose center is fixed to the filter support shaft. The top plate may be installed so as to be movable in the vertical direction in the processing container. In this case, the top plate may be driven by a winch device.

In the filter cleaning apparatus, a rubber lip seal member is provided at the upper end portion of the filter, which is formed in a substantially triangular cross-section, with the upper end serving as a vertex and slope portions on both sides of the vertex. A frustoconical seal bracket is provided on the lower surface of the top plate installed inside so as to face the lip seal member, and the tip end portion of the seal bracket enters the inner peripheral side of the lip seal from above, The inside of the filter may be sealed by bringing the lower end of the seal bracket into contact with the slope of the lip seal.

The filter cleaning apparatus of the other granular material processing apparatus of the present invention is installed in the processing container of the granular material processing apparatus, and a pleat part formed by bending the filter cloth in a bowl shape is provided on the outer peripheral part thereof. A cleaning device for a cylindrical filter, which is connected to a filter rotation shaft attached to the filter via a filter rotation shaft and a rotation joint, and the filter rotation shaft is rotatably attached to the filter. A filter support shaft that is rotatably suspended in the processing container, and a cleaning nozzle that is installed in the processing container, injects a cleaning liquid from the tangential direction of the filter, and rotates the filter by the cleaning liquid. A seal bracket provided on the lower surface of the top plate installed in the processing container so as to face the upper end of the filter, and the seal bracket. A cylinder pedestal attached to the lower end of the cylinder pedestal, and an air cylinder disposed above the cylinder pedestal. The filter support shaft is moved vertically by the fluid pressure cylinder, and the filter Moves vertically in the processing vessel.

The filter cleaning method of the granular material processing apparatus of the present invention is installed in a processing container of the granular material processing apparatus, and is provided with a cylindrical shape provided with a pleat portion formed by bending a filter cloth in a bowl shape on the outer periphery thereof. A filter cleaning method for a granular material processing apparatus for cleaning a filter in a processing container, wherein the filter is suspended in a rotatable manner in the processing container and can be accommodated in the filter The filter is installed so as to be movable in the vertical direction in the processing container, and the cleaning liquid is sprayed from the cleaning nozzle installed in the processing container to the pleated portion from the tangential direction of the filter, while rotating the filter by, and, while moving in the vertical direction the filter in the processing chamber, and performing a cleaning of the filter by the cleaning liquid

  In the present invention, a cylindrical filter provided with a pleat part is rotatably disposed in a processing container, and a cleaning liquid is sprayed in a filter tangential direction from a cleaning nozzle installed in the processing container to the pleat part. The filter is cleaned while rotating the filter with this cleaning liquid. When the filter rotates, the fine powder collected in the back of the pleat portion is sent to the outer peripheral side together with the cleaning liquid by centrifugal force accompanying the rotation, and the fine powder in the back of the pleat is discharged out of the filter together with the cleaning liquid.

In the filter cleaning method, a plurality of the filters are installed in the processing container, and the cleaning nozzle is disposed at an intermediate position of the filter adjacent to the wall surface of the processing container, and faces one cleaning nozzle. The filters adjacent to each other in the circumferential direction may be rotated in opposite directions by the cleaning liquid sprayed on the two filters . Also in this case, as described above, the number of pipes and nozzle mounting portions is reduced, the cost is reduced, and contamination of the cleaning nozzle itself is reduced. In the filter cleaning method, the filter is installed so as to be movable in the vertical direction, and the cleaning liquid is jetted from the cleaning nozzle to the filter while moving the filter in the vertical direction in the processing container. Anyway.

According to the filter cleaning apparatus of the granular material processing apparatus of the present invention, it is attached to the filter by the cylindrical filter cleaning apparatus which is installed in the processing container of the granular material processing apparatus and is provided with a pleat portion on the outer periphery. A filter rotation shaft , a filter support shaft that is rotatably connected to the filter rotation shaft via a rotary joint, and a filter that is rotatably suspended in the processing container; and a pleat that is installed in the processing container from the tangential direction of the filter. A cleaning nozzle that injects cleaning liquid into the part and rotates the filter, and a fluid pressure cylinder that can be accommodated in the filter and can extend and contract the filter support shaft in the vertical direction. since so as to move in, while rotating the filter it is possible to clean the filter. For this reason, the fine powder accumulated in the back of the pleat portion can be led out to the outer peripheral side together with the cleaning liquid by the centrifugal force accompanying the rotation of the filter, and the fine powder in the back of the pleat can be easily cleaned. Therefore, the filter can be sufficiently cleaned without removing it from the apparatus, and the filter can be CIP cleaned.

  According to the filter cleaning method for a granular material processing apparatus of the present invention, a filter for cleaning a cylindrical filter provided in a processing container of a granular material processing apparatus and provided with a pleat portion on the outer periphery thereof in the processing container. In the cleaning method, the filter is suspended in the processing container so as to be rotatable, and the cleaning liquid is sprayed from the cleaning nozzle installed in the processing container to the pleat portion from the tangential direction of the filter, and the cleaning liquid is rotated while rotating the filter. Since the filter is cleaned, the fine powder accumulated in the back of the pleat part can be led out to the outer peripheral side together with the cleaning liquid by centrifugal force accompanying the rotation of the filter, and the fine powder in the back of the pleat can be easily cleaned. It becomes possible. Therefore, the filter can be sufficiently cleaned without removing it from the apparatus, and the filter can be CIP cleaned.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an explanatory diagram showing the configuration of a fluidized bed granulating apparatus equipped with a filter cleaning apparatus 10 that is Embodiment 1 of the present invention. In the fluidized bed granulation coating apparatus (powder particle processing apparatus) 1 of FIG. 1, a substantially cylindrical processing container 2 is provided in an almost upright manner, and a filter 3 is suspended in a rotatable manner inside the processing container 2. . Four filters 3 are equally arranged in the circumferential direction. The number of filters 3 is not limited to four, and may be one or two or more. However, in order to enhance the filter function, it is preferable to install a plurality of filters.

  A perforated plate 4 is attached to the bottom of the processing container 2 and connected to an air supply duct 5. A cleaning filter 6 and a heat exchanger 7 are provided in the air supply duct 5. Gas is supplied to the air supply duct 5 from a blower (not shown). The gas introduced into the air supply duct 5 is cleaned by the cleaning filter 6 and then heated or cooled by the heat exchanger 7 to be adjusted to a predetermined temperature. The gas having a predetermined temperature passes through the perforated plate 4 and enters the processing container 2 to fluidize the raw material powder. The gas in the processing container 2 flows to the upper part of the processing container through the filter 3 and is discharged out of the apparatus through the exhaust duct 8.

  A spray nozzle 9 is provided in the processing container 2. The spray nozzle 9 is connected to a liquid feed pump (not shown) so that a binder liquid or a coating liquid can be sprayed into the processing container 2. By this spray nozzle 9, a binder liquid or the like is supplied to the granular material fluidized by the gas flow, and granulation processing or coating processing is performed in the processing container 2. A cleaning nozzle 20 is attached to the side wall 2 a of the processing container 2, and when the cleaning water is jetted from the cleaning nozzle 20 to the filter 3, the filter 3 rotates.

  The filter 3 is attached to a top plate 11 installed above the spray nozzle 9 and is suspended in the processing container 2. The top plate 11 is formed in a substantially disc shape, and its peripheral edge is in contact with the inner surface of the processing container 2. Above the top plate 11, a pulse jet nozzle (gas ejection nozzle) 12 for ejecting pulse air for backwashing is installed. The pulse jet nozzle 12 is connected to a pulse air supply source (not shown) via an air pipe 13 and ejects pulse air to the inside of the filter 3 so as to drop off (backwash) the granular material adhering to the filter 3. .

  An opening 14 is formed in the top plate 11 below the pulse jet nozzle. A filter 3 is attached below the opening 14. FIG. 2 is an exploded perspective view showing the attachment state of the filter 3. A stainless steel seal bracket 15 is attached to the periphery of the opening 14. The seal bracket 15 is formed in a substantially cylindrical shape with a stepped upper portion and a substantially truncated cone shape in the lower portion, and is fixed to the top plate 11 by welding. A vent hole 16 penetrates the seal bracket 15 in the vertical direction. A cylinder base 17 is fitted and fixed to the inner periphery of the upper end of the seal bracket 15. A cylinder mounting hole 18 is formed at the center of the cylinder base 17, and a plurality of air holes 19 are radially formed around the cylinder mounting hole 18.

  An air cylinder (fluid pressure cylinder) 21 is fixed to the lower surface side of the cylinder base 17. Compressed air is supplied to the air cylinder 21 from a compressor (not shown). As shown in FIG. 1, the air cylinder 21 extends downward from the cylinder pedestal 17, passes through the seal bracket 15, and its lower portion is accommodated in the inner peripheral portion 3 a of the filter 3. A piston rod (filter support shaft) 22 projects downward from the lower end of the air cylinder 21. A rotary joint 23 is attached to the lower end of the piston rod 22.

  A filter rotary shaft 24 is attached to the rotary joint 23, and the filter rotary shaft 24 is rotatable with respect to the piston rod 22 via the rotary joint 23. FIG. 1 shows a state in which the piston rod 22 of the air cylinder 21 is contracted and the filter rotating shaft 24 is pulled upward. When the air cylinder 21 is operated, the piston rod 22 protrudes from the air cylinder 21 and the filter rotating shaft. 24 moves downward, and accordingly, the filter 3 also moves downward (see FIG. 6).

  The filter rotation shaft 24 is inserted through an attachment hole 25 a at the center of the end cap 25 attached to the lower end portion of the filter 3. A male screw 24a is formed at the lower end of the filter rotating shaft 24, and a filter fixing knob 26 is attached thereto. Thus, the filter 3 is suspended from the top plate 11 in a freely rotatable state by the cylinder base 17, the air cylinder 21, the piston rod 22, the rotary joint 23, the filter rotating shaft 24, and the end cap 25.

  On the other hand, an end cap 27 is fixed to the upper end portion of the filter 3. A lip seal 28 is fixed to the upper surface of the end cap 27. 3A and 3B are diagrams showing the configuration of the lip seal 28, wherein FIG. 3A is a front view thereof, and FIG. 3B is a cross-sectional view taken along line AA of FIG. As shown in FIG. 3, the lip seal 28 is a lip seal type silicon rubber sealing member, and is formed in a mountain shape with a substantially triangular cross section. In the state of FIG. 1, the slope portion 29 of the lip seal 28 is in contact with the lower end portion of the seal bracket 15. Thereby, the upper part of the filter 3 is sealed, and the filter inner peripheral part 3a communicates with the vent hole 16 and the vent hole 19 in an airtight state. For a member that moves up and down like the filter 3, by using a lip seal member having a chevron-shaped cross section as shown in FIG. 3, the filter 3 can be easily and securely sealed, and the configuration of the apparatus is simplified and the cost is reduced. Reliability is improved.

  A retainer (anti-shake member) 31 is fixed to the lower end portion of the seal bracket 15. As shown in FIG. 2, the retainer 31 has a hook-like shape in which three leg portions 31b are fixed to a ring portion 31a. The retainer 31 is inserted into the inner peripheral portion 3a of the filter 3 with the ring portion 31a facing downward. When the filter 3 rotates during cleaning, its lower end is supported by the end cap 25 and the filter rotating shaft 24, but the upper end is configured so that the air cylinder 21 is disposed in the cavity. Sway around. Therefore, in the granulation coating apparatus 1, a blur stopper 21 is inserted into the upper end portion of the filter 3 to prevent blurring when the filter 3 rotates. In other words, the anti-blur 21 holds the upper end of the filter 3 during rotation to stabilize the rotation of the filter 3.

  The filter 3 is constituted by a filter medium obtained by forming a filter cloth made of a polyester nonwoven fabric into a cylindrical shape. On the outer periphery of the filter 3, a pleat portion 32 formed by bending a filter cloth in a bowl shape is provided. The longitudinal dimension of the filter 3 is 130 to 550 mm for a small device, about 220 to 1200 mm for a large device, and the outer diameter of the filter 3 is about 75 to 120 mm for a small device and about 200 to 325 mm for a large device. It is formed. The pleat portion 32 is formed to have a size of 13 to 25 mm in a small device and about 45 to 55 mm in a large device.

  The cleaning nozzle 20 is attached to the side wall 2 a of the processing container 2 so as to face the filter 3. FIG. 4 is an explanatory diagram showing the arrangement state of the cleaning nozzle 20, and FIG. 5 is an explanatory diagram showing the positional relationship between the cleaning nozzle 20 and the filter 3. As shown in FIG. 4, one cleaning nozzle 20 is installed on each side of the processing container side wall 2 a corresponding to each filter 3. Here, since the cleaning nozzle 20 is provided on the processing container side wall 2a, the filter cleaning apparatus can be installed without significantly changing the configuration of the conventional apparatus. As shown in FIG. 5, the cleaning nozzle 20 is disposed so as to be inclined by an angle θ with respect to the side wall 2 a, and the cleaning liquid 33 hits the filter 3 from the tangential direction.

  A cleaning liquid pipe 34 is connected to the cleaning nozzle 20. The cleaning liquid pipe 34 is connected to a cleaning liquid tank 36 via a cleaning pump 35. A filter cleaning liquid 33 is stored in the cleaning liquid tank 36. The cleaning liquid 33 is supplied from the cleaning liquid tank 36 to the cleaning nozzle 20 by the cleaning pump 35.

  The fluidized bed granulation coating apparatus 1 having such a configuration processes the granular material as follows. First, a gas adjusted to a predetermined temperature is supplied into the processing container 2 via the air supply duct 5. A raw material granular material is introduced into the processing vessel 2 from a raw material introduction port (not shown), and is brought into a fluid state by the gas flowing through the perforated plate 4 and flowing into the processing vessel 2. On the other hand, a binder liquid and a coating liquid are sprayed from the spray nozzle 9, and granulation and coating of a granular material are performed. The gas used for fluidizing the granular material is discharged from the exhaust duct 8 through the filter 3.

  When the gas passes through the filter 3, the granular material and the gas are separated by the filter medium of the filter 3. If the separation process by the filter 3 is continued as it is, the filter medium is clogged with fine powder (fine matter) of the granular material, and the filtration efficiency of the filter 3 is reduced. Therefore, fine powder is appropriately removed to eliminate the clogging that causes the efficiency reduction. When fine powder is removed, pulsed air is ejected from the pulse jet nozzle 12 installed above the filter 3 into the space inside the filter 3.

  On the other hand, in the filter 3 formed in a pleat shape, the backwash air flow is difficult to pass through the back of the pleat portion 32, and there is a possibility that it cannot be sufficiently wiped off if fine powder adheres thereto. Therefore, in the fluidized bed granulation coating apparatus 1, the cleaning liquid 33 is sprayed onto the filter 3 from the cleaning nozzle 20, and the fine powder adhering to the back of the pleat portion 32 is washed away. FIG. 6 is an explanatory diagram showing the state of the cleaning process performed by the cleaning nozzle 20. As shown in FIG. 6, first, the filter rotating shaft 24 is lowered by the air cylinder 21 and the filter 3 moves downward. Next, the cleaning pump 35 is operated, and the cleaning liquid 33 is pumped up from the cleaning liquid tank 36 and supplied to the cleaning nozzle 20.

  At this time, as shown in FIG. 5, the cleaning liquid 33 is sprayed onto the filter 3 from the tangential direction and hits the pleat portion 32 of the filter 3. As a result, the filter 3 rotates like a water wheel about the filter rotation shaft 24 by the water pressure of the cleaning liquid 33 while being pivotally supported by the rotary joint 23. When the filter 3 rotates, the fine powder accumulated in the back of the pleat portion 32 is sent to the outer peripheral side together with the cleaning liquid 33 by the centrifugal force accompanying the rotation. That is, the cleaning liquid 33 sprayed to the pleat part 32 reaches the back part of the pleat and is discharged from the filter 3 together with the fine powder by centrifugal force.

  Here, in the apparatus, when the filter is cleaned by the cleaning nozzle 20, the adjacent filters 3 rotate in opposite directions. When the filters 3 are rotated in directions opposite to each other, the cleaning nozzles 20 do not need to be individually arranged in the processing container 2, and the cleaning nozzles 20 can be centrally arranged at two locations as shown in FIG. it can. Thereby, compared with the case where the four cleaning nozzles 20 are arranged in four places, piping and nozzle mounting portions can be reduced, and the apparatus cost can be reduced. Further, in the arrangement as shown in FIG. 4, the cleaning liquid 33 that scatters with the rotation of the filter 3 does not reach the other adjacent cleaning nozzles 20, so that the contamination of the cleaning nozzles 20 itself is reduced.

  After cleaning the upper part of the filter 3, the air cylinder 21 is driven again, the filter rotating shaft 24 is raised, and the filter 3 is moved upward (returned to the state of FIG. 1). Then, the cleaning liquid 33 is sprayed from the cleaning nozzle 20 in the same manner as described above, and the filter 3 is cleaned. In this case, the filter 3 may be moved upward while spraying the cleaning liquid 33. The movement of the filter 3 is not limited to one direction, and the cleaning liquid 33 may be sprayed while reciprocating up and down.

  Thus, in the fluidized bed granulation coating apparatus 1, the cleaning liquid 33 is sprayed from the tangential direction to the filter 3, and the fine powder cleaning is performed while rotating the filter 3 by the cleaning spray. The fine powder in the back of the pleat can also be sufficiently cleaned by the rotational cleaning process using centrifugal force. Therefore, the cleaning process can be sufficiently performed without removing the filter 3 from the apparatus, and it is possible to realize the CIP cleaning that could not be achieved conventionally. Of course, after performing simple cleaning using the cleaning nozzle 20 in the apparatus and removing dust on the surface of the filter 3, the filter 3 may be removed from the system and precision cleaning may be performed. That is, a cleaning system using the cleaning nozzle 20 can be used for “rough cleaning”.

  Next, the filter cleaning apparatus 40 which is Example 2 of this invention is demonstrated. FIG. 7 is an explanatory diagram showing the configuration. In the following embodiments, the same members and portions as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the first embodiment, the air cylinder 21 is accommodated in the filter 3. However, in the filter cleaning device 40 of the second embodiment, as shown in FIG. 7, the cylinder base 17 is attached to the lower end portion of the seal bracket 15. An air cylinder 21 is arranged on the upper side. In this case, a retainer 41 having an “eight-figure” shape as shown in FIG. 8 is used as the retainer. Thus, by arranging the air cylinder 21 at the lower end of the seal bracket 15, the vertical dimension of the entire filter cleaning device 40 is shortened, and the device of the present invention is applied to a small fluidized bed granulation coating device. It becomes easy.

  FIG. 9 is an explanatory diagram showing the configuration of a fluidized bed granulator equipped with a filter cleaning device 42 that is Embodiment 3 of the present invention. Here, the filter 3 is installed so as to be suspended from the ceiling portion 2b of the processing container 2, and is operated in the vertical direction by an elevating device 43 attached to the ceiling portion 2b. An opening 14 is formed in the top plate 11 as in the apparatus of FIG. 1, and a seal bracket 15 is fixed to the periphery of the opening 14. A filter 3 is attached below the opening 14, and end caps 25 and 27 are attached to both ends of the filter 3. A lip seal 28 is fixed to the end cap 27 and can be in close contact with the seal bracket 15.

  In the filter cleaning device 42 of FIG. 9, the filter rotation shaft 24 is connected to the filter support rod 44 via the rotation joint 23. Thereby, the filter 3 is rotatably supported by the filter support rod 44. The filter support rod 44 extends from the upper end of the processing container 2 to the outside of the apparatus, and is connected to the lifting device 43. An air cylinder 45 is disposed in the lifting device 43, and the filter support rod 44 moves in the vertical direction by the operation of the air cylinder 45. FIG. 9 shows a state where the piston rod of the air cylinder 45 is contracted and the filter support rod 44 is raised upward. As in the first embodiment, a cleaning nozzle 20 is attached to the side wall 2 a of the processing container 2 so as to face the filter 3.

  FIG. 10 is an explanatory diagram showing the configuration of a fluidized bed granulator equipped with a filter cleaning device 51 that is Embodiment 4 of the present invention. In the above-described embodiment, the configuration in which the filter 3 is moved in the vertical direction by the air cylinder 21 is shown. However, the vertical movement means of the filter 3 is not limited to this. For example, as shown in FIG. Thus, the filter 3 may be moved up and down.

  Here, the winch device 52 is installed outside the fluidized bed granulation coating device 1 and includes a motor 54 to which a pulley 53 is attached, a pulley 55, a wire 56, and a wire guide 57. The wire 56 is attached between the connecting rod 58 and the pulley 53. The rotary joint 23 is attached to the lower end of the connecting rod 58, and the filter rotating shaft 24 is rotatably attached to the lower side thereof. When the motor 54 is driven in the state of FIG. 10, the pulley 53 rotates and the wire 56 is loosened, and the filter 3 moves downward under its own weight. It is possible to install the motor 54 on the top plate 11.

It goes without saying that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.
For example, as indicated by a broken line in FIG. 1, a plurality of cleaning nozzles 20 may be arranged in the vertical direction of the side wall 2a, whereby the entire filter 3 can be cleaned without moving up and down, It can be omitted. Further, in order to enhance the centrifugal force generated in the filter 3, the filter 3 may be rotated by an electric motor, or the filter 3 may be rotated by an air flow (for example, the air is diverted from the air supply duct 5).

  Furthermore, in the above-described embodiment, the filter 3 is rotated in the opposite direction. However, all the filters 3 may be rotated in the same direction. In this case, as shown in FIG. 11, the cleaning nozzles 20 are arranged in four directions. However, since the scattered liquid from the filter 3 flies in the same direction, the scattered liquid is equally applied to the side wall 2 a in four directions, The side walls 2a are cleaned together and the behavior of the liquid flow in the processing container 2 is stabilized.

  In addition, in the fluidized bed granulation coating apparatus 1 in the above-described embodiment, the top plate 11 is fixed to the processing container 2, but the upper part or the top plate in the processing container 2 is higher than the top plate 11. In order to clean the upper surface of 11, the top plate 11 may be installed so as to be movable in the vertical direction by a winch device. At that time, a packing that appears and disappears by air is attached around the top plate 11, and when the top plate is fixed, the packing is extended by air and brought into close contact with the inner surface of the side wall 2 a to fix the top plate 11 to the side wall 2 a.

  In addition, when the top plate 11 is moved up and down by the winch device, if the configuration in which the filter 3 is also moved up and down by the winch device as shown in FIG. 10 is adopted, one winch device is required for each filter. There is a possibility that the number increases and the apparatus configuration becomes complicated. For example, when four filters are installed, a total of five winch devices including those for the top plate are required, and the number of winch devices increases accordingly in a device in which a plurality of filters are installed. For this reason, the configuration is simplified when the filter is moved up and down by the air cylinder as in the first embodiment, which is advantageous in terms of apparatus cost, maintenance, and the like.

It is explanatory drawing which shows the structure of the fluidized-bed granulation apparatus equipped with the filter washing | cleaning apparatus which is Example 1 of this invention. It is a disassembled perspective view which shows the attachment state of a filter. It is a figure which shows the structure of a rubber packing, (a) is the front view, (b) is sectional drawing along the AA of (a). It is explanatory drawing which shows the arrangement | positioning state of a washing nozzle. It is explanatory drawing which shows the positional relationship of a washing nozzle and a filter. It is explanatory drawing which shows the mode of the washing process process by a washing nozzle. It is explanatory drawing which shows the structure of the filter washing | cleaning apparatus which is Example 2 of this invention. It is explanatory drawing which shows an example of the retainer used by the structure of FIG. It is explanatory drawing which shows the structure of the fluidized-bed granulation apparatus equipped with the filter washing | cleaning apparatus which is Example 3 of this invention. It is explanatory drawing which shows the structure of the fluidized-bed granulation apparatus equipped with the winch drive filter washing | cleaning apparatus which is Example 4 of this invention. It is explanatory drawing which shows arrangement | positioning of the washing nozzle in the case of rotating a filter in the same direction.

Explanation of symbols

1 Fluidized bed granulation coating equipment (powder processing equipment)
DESCRIPTION OF SYMBOLS 2 Processing container 2a Side wall 2b Ceiling part 3 Filter 3a Inner peripheral part 4 Perforated board 5 Air supply duct 6 Cleaning filter 7 Heat exchanger 8 Exhaust duct 9 Spray nozzle 10 Filter washing | cleaning apparatus 11 Top plate 12 Pulse jet nozzle 13 Air piping 14 Opening 15 Seal bracket 16 Vent hole 17 Cylinder base 18 Cylinder mounting hole 19 Vent hole 20 Cleaning nozzle 21 Air cylinder (fluid pressure cylinder)
22 Piston rod (filter support shaft)
23 Rotating joint 24 Filter rotating shaft 24a Male thread 25 End cap 25a Mounting hole 26 Filter fixing knob 27 End cap 28 Lip seal (lip seal member)
29 Slope 31 Retainer (Anti-blurring member)
31a Ring part 31b Leg part 32 Pleated part 33 Cleaning liquid 34 Cleaning liquid piping 35 Cleaning pump 36 Cleaning liquid tank 40 Filter cleaning device 41 Retainer 42 Filter cleaning device 43 Lifting device 44 Filter support rod 45 Air cylinder 51 Filter cleaning device 52 Winch device 53 Pulley 54 Motor 55 Pulley 56 Wire 57 Wire guide 58 Connecting rod θ Cleaning nozzle mounting angle

Claims (9)

A cylindrical filter cleaning device provided in a processing container of a granular material processing apparatus, and provided with a pleat part formed by bending a filter cloth into a bowl shape on the outer periphery thereof,
A filter rotation shaft attached to the filter;
The connected filter rotating shaft via the rotary joint, the both filter rotation shaft is mounted rotatably, and the filter support shaft for suspended rotatably the filter into the processing chamber,
A cleaning nozzle that is installed in the processing container, injects a cleaning liquid from the tangential direction of the filter to the pleated portion, and rotates the filter with the cleaning liquid ;
A fluid pressure cylinder that can be accommodated in the filter and can extend and contract the filter support shaft in the vertical direction;
The filter cleaning apparatus of the granular material processing apparatus , wherein the filter moves in the vertical direction in the processing container as the filter support shaft moves in the vertical direction by the fluid pressure cylinder . In the filter cleaning apparatus granular material processing apparatus according to claim 1, wherein the filter disposed in an intermediate position of the filter is a plurality placed Rutotomoni, the cleaning nozzle adjacent the wall of the processing chamber into the processing chamber In the powder processing apparatus, the filters adjacent to each other in the circumferential direction are rotated in opposite directions by the cleaning liquid sprayed to the two filters facing each other from the one cleaning nozzle . Filter cleaning device. In the filter cleaning apparatus of the granular material processing apparatus according to claim 1,
The filter rotation shaft is fixed to the lower end of the filter,
An anti-blur member is disposed on the inner peripheral side of the upper end of the filter so as to abut against the inner periphery of the filter and prevent the upper end of the filter from swinging around when the filter rotates. Filter cleaning device for particle processing equipment. In the filter cleaning apparatus of the granular material processing apparatus according to claim 3,
The anti-blur member includes a plurality of leg portions fixed to a top plate installed in the processing container, and a ring portion fixed to the lower end of the leg portion,
The said ring part and the said leg part are inserted in the inner peripheral part of the said filter from the upper end part of the said filter, The filter washing | cleaning apparatus of the granular material processing apparatus characterized by the above-mentioned. In the filter cleaning apparatus of the granular material processing apparatus according to claim 3,
The anti-blur member has an 8-shaped shape with a central portion fixed to the filter support shaft. In the filter cleaning apparatus of the granular material processing apparatus according to claim 1,
Provided with a rubber lip seal member formed in a substantially triangular cross section at the upper end of the filter, with the upper end as a vertex and slope portions on both sides of the vertex,
A frustoconical seal bracket is provided on the lower surface of the top plate installed in the processing container so as to face the lip seal member ,
The inside of the filter is sealed by the tip end portion of the seal bracket entering the inner peripheral side of the lip seal from above, and the lower end portion of the seal bracket abutting against the slope portion of the lip seal. Filter cleaning equipment for powder processing equipment. A cylindrical filter cleaning device provided in a processing container of a granular material processing apparatus, and provided with a pleat part formed by bending a filter cloth into a bowl shape on the outer periphery thereof,
A filter rotation shaft attached to the filter;
A filter support shaft that is connected to the filter rotation shaft via a rotation joint, the filter rotation shaft is rotatably mounted, and the filter is rotatably suspended in the processing container;
A cleaning nozzle that is installed in the processing container, injects a cleaning liquid from the tangential direction of the filter to the pleated portion, and rotates the filter with the cleaning liquid;
A seal bracket provided on the lower surface of the top plate installed in the processing container so as to face the upper end of the filter;
A cylinder base attached to the lower end of the seal bracket;
An air cylinder disposed on the upper side of the cylinder base,
The filter cleaning apparatus of the granular material processing apparatus, wherein the filter moves in the vertical direction in the processing container as the filter support shaft moves in the vertical direction by the fluid pressure cylinder. A granular material that is installed in a processing container of a granular material processing apparatus, and in which the cylindrical filter provided with a pleat portion formed by bending a filter cloth in a bowl shape is washed in the processing container. A filter cleaning method for a processing apparatus,
The filter is suspended in a rotatable manner in the processing container, and the filter is installed so as to be vertically movable in the processing container by a fluid pressure cylinder that can be accommodated in the filter.
The cleaning liquid is sprayed from the cleaning nozzle installed in the processing container to the pleat portion from the tangential direction of the filter, and the filter is rotated by the cleaning liquid, and the filter is moved up and down in the processing container. A filter cleaning method for a powder processing apparatus, wherein the filter is cleaned with the cleaning liquid while moving in a direction . In the filter cleaning method particulate material processing apparatus according to claim 8, wherein the filter is arranged in an intermediate position of the filter is a plurality placed Rutotomoni, the cleaning nozzle adjacent the wall of the processing chamber into the processing chamber In the powder processing apparatus, the filters adjacent to each other in the circumferential direction are rotated in opposite directions by the cleaning liquid sprayed to the two filters facing each other from the one cleaning nozzle . Filter cleaning method.

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