JP2020018972A - Multiple disk type dehydrator - Google Patents

Abstract

To provide a multiple disk type dehydrator capable of efficiently discharging a treatment object from a discharge port.SOLUTION: A multiple disk type dehydrator 100 comprises: laminated rotary filtering bodies 20 having a rotary shaft 21, and a plurality of filtering pieces (medium diameter disk filtering pieces 22, small diameter disk filtering pieces 23 and large diameter disk filtering pieces 24) laminated along the axial direction of the rotary shaft 21 and being formed with filtration grooves G between the filtering pieces; a plurality of rotors 2 being adjacently arranged in two upper and lower rows; a treatment tank 1 including a pair of side plates 11 disposed so as to sandwich the laminated rotary filtering bodies 20 in the axial direction of the rotary shaft 21; and a disk member 6 having a larger diameter than the maximum diameter of the filtering pieces and being disposed between the side plate 11 and the laminated rotary filtering body 20 so as to be rotatable with the rotor 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a multi-disc dehydrator, and more particularly, to a multi-disc dehydrator having a plurality of stacked rotary filters.

  2. Description of the Related Art Conventionally, a multi-disc dehydrator having a stacked rotary filter has been known (for example, see Patent Document 1).

  In Patent Document 1, a plurality of rotating bodies including a rotating shaft and a laminated rotating filter, and a processing tank including a pair of side plates provided so as to sandwich the laminated rotating filter in the axial direction of the rotating shaft. A multi-disc dehydrator comprising: The multi-disc dehydrator is configured to dewater sludge (object to be processed) by a laminated rotary filter in a treatment tank and discharge dehydrated sludge (dewater cake) from which water is removed from an outlet. ing.

JP-A-10-137795

  However, in the multi-disc dehydrator as disclosed in Patent Document 1, when performing a dehydration process on an object having poor slippage, the object comes into contact with a pair of side plates of the processing tank, thereby causing the rotation shaft to rotate. Due to the frictional force (brake) applied to the object to be processed outside in the axial direction, the object (from the discharge port) is closer to the pair of side plates than to the central part in the axial direction. There is an inconvenience that the amount of dewatered cake) is reduced. For this reason, there is a problem in that the object to be processed is not uniformly discharged in the axial direction of the outlet, and the object to be processed is not efficiently discharged from the outlet.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a multi-disc dehydrator capable of efficiently discharging an object to be processed from an outlet. To provide.

  A multi-disc dehydrator according to one aspect of the present invention has a rotating shaft and a plurality of filter pieces stacked along an axial direction of the rotating shaft, wherein a filter groove is formed between the filter pieces. A plurality of rotators provided adjacent to each other in two rows in the upper and lower rows, a processing tank including a pair of side plates provided so as to sandwich the laminated rotative filter in the axial direction of the rotation shaft; A disk member having a diameter larger than the maximum diameter of the piece and provided between the side plate and the laminated rotary filter so as to be rotatable together with the rotary body.

  In the multi-disc dehydrator according to one aspect of the present invention, as described above, the object to be processed near the side plate can be sent to the discharge port by rotating the disk member together with the rotating body. Further, since the disc member has a diameter larger than the maximum diameter of the filter piece, the disc member penetrates more into the object to be processed than the filter piece to secure a large area for generating a propulsive force for the object to be processed. In the vicinity of the side plate on which the disk member is disposed, a larger propulsive force than the filter piece can be applied to the object. As a result, a large propulsive force is applied to the object to be processed on the outside of the rotation axis in the axial direction where a large frictional force (brake) is generated with respect to the object to feed the object in the axial direction of the rotation axis Since the amount can be equalized and discharged from the discharge port, the object to be processed (dehydrated cake) can be efficiently discharged from the discharge port.

  In the multi-disc dehydrator according to the above aspect, preferably, the disc members are provided on both sides of the laminated rotary filter in the axial direction of the rotary shaft. With this configuration, the processing object near the side plate can be effectively sent to the discharge port on both sides of the laminated rotary filter. As a result, the object to be processed (dewatered cake) can be more efficiently discharged from the discharge port.

  In the multi-disc dehydrator according to the one aspect, preferably, the filter pieces are a plurality of small-diameter disc filter pieces, and a plurality of medium-diameter disc filter pieces having a diameter larger than the small-diameter disc filter pieces, A plurality of large-diameter disc filters having a diameter larger than that of the medium-diameter disc filter, and the disc member has a larger diameter than the large-diameter disc filter. With this configuration, since the disk member has a diameter larger than the diameter of the large-diameter disk filter, the disk member does not penetrate the workpiece more than the large-diameter disk filter. As a result, a large area for generating a propulsive force for the object to be processed can be secured, and the object to be processed can be conveyed with a larger force than the large-diameter disc filter near the side plate on which the disk member is disposed. Accordingly, a large propulsive force can be applied to the object to be processed on the outer side in the axial direction of the rotating shaft where a large frictional force (brake) is generated with respect to the object to be processed. Can be discharged more efficiently.

  In the multi-disc dehydrator according to the one aspect, preferably, the rotating body is provided in a plurality of upper and lower two rows from the supply port side of the object to be processed to the discharge port side, and viewed from the axial direction, The disk members are arranged adjacent to each other so as to overlap each other, and at least every other disk member is provided for a plurality of rotating bodies adjacent to each other in the upper and lower two rows. With this configuration, the plurality of disk members can be arranged without interfering with each other in a direction orthogonal to the axial direction of the rotation shaft.

  In the multi-disc dehydrator according to the one aspect, preferably, between the side plate and the disk member, both the side plate and the disk member are in contact, and a smaller diameter than the disk member and the filter piece. Is provided. With this configuration, the resistance (rotation due to friction between the side plate and the disk member) applied to the rotating body when the side plate (the inner surface of the side plate) is brought into direct contact with the disk member without providing the spacer member is provided. As compared with the force applied to the body, the resistance applied to the rotating body (the force applied to the rotating body due to friction between the disk member and the spacer member or between the side plate and the spacer member) can be reduced. .

  In the multi-disc dehydrator according to the above aspect, preferably, the disc member is a most-rotating member and a most-rotating member in the direction in which the solid component of the processing target is sent out of the plurality of rotating members in the lower row. , And is provided on a rotating body located upstream of the most downstream rotating body among the plurality of rotating bodies in the upper row. Here, in a general multi-disc dehydrator, a scraper (a member that scrapes solids from the rotating body) is provided on each of the lowermost rotating bodies in the upper and lower rows, and the most upstream rotating body in the lower row is provided on the lowermost rotating bodies. A seal member (a member that fills a gap between the rotating body and the inner surface of the processing tank) is provided. In such a multi-disc dehydrator, with the above configuration, it is possible to avoid interference between the disc member, the scraper, and the seal member.

  In the multiple disc dehydrator according to the above aspect, preferably, the radius of the disc member is smaller than a value obtained by subtracting the radius of the rotating shaft from the distance between the rotation center axes of the adjacent rotating bodies. According to this structure, it is possible to prevent the disk member from interfering with the rotating shaft of the adjacent rotating body.

  According to the present invention, as described above, it is possible to provide a multi-disc dehydrator capable of efficiently discharging an object to be processed from an outlet.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which looked at the multiple disk type dehydrator by one Embodiment of this invention from diagonally upward. It is sectional drawing which looked at the multiple disk type dehydrator by one Embodiment of this invention from the side. It is sectional drawing which expanded and showed the lamination | stacking rotary filter, the disk member, and a pair of side plates of the multiple disk type dehydrator by one Embodiment of this invention. It is an exploded perspective view of a lamination type rotary filter and a disk member of a multiple disk type dehydrator according to one embodiment of the present invention.

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

(Configuration of multiple disc dehydrator)
With reference to FIGS. 1 to 4, a multi-disc dehydrator 100 according to an embodiment of the present invention will be described.

  The multi-disc dehydrator 100 shown in FIG. 1 is configured to separate the supplied workpiece (undiluted solution) into a solid component and a liquid component. The multi-disc dehydrator 100 is configured to store the separated liquid component in a filtrate storage unit (not shown) provided at the lower part of the processing tank 1.

  As shown in FIG. 1, the multi-disc dehydrator 100 includes a treatment tank 1, a plurality of rotating bodies 2, a seal member 3, a scraper (scraper) 4, a discharge chute 5, a disc member, 6 is provided.

  The processing tank 1 is formed of a material which is hardly corroded. For example, the processing tank 1 is formed of a stainless material. The processing tank 1 has a rectangular parallelepiped shape. The processing bath 1 includes a pair of side plates 10 facing each other in the horizontal direction, and a pair of side plates 11 (only one of the pair of side plates 11 is shown in FIGS. 1 and 2). One of the pair of side plates 10 is provided with a supply port 10a for an object to be processed (stock solution), and the other of the pair of side plates 10 is provided with an outlet 10b for an object to be processed (dehydrated cake).

  Hereinafter, the direction in which the pair of side plates 10 are arranged in the horizontal direction (the direction in which the supply port 10a and the discharge port 10b are arranged) is referred to as the X direction, and the direction orthogonal to the X direction in the horizontal direction (the direction in which the pair of side plates 11 are arranged) ) Is the Y direction. Note that the Y direction is also the axial direction of a rotating shaft 21 described later. In the X direction, the direction from the supply port 10a to the discharge port 10b is defined as the X1 direction, and the opposite direction is defined as the X2 direction. The vertical direction is defined as the Z direction.

  A plurality of rotating bodies 2 are provided in upper and lower two rows from the supply port 10a side of the workpiece to the discharge port 10b side. Specifically, a total of 14 rotators 2 are arranged in the lower row, 8 in the lower row and 6 in the upper row.

  As shown in FIG. 2, the rotating bodies 2 are arranged adjacent to each other so as to overlap with each other when viewed from an axial direction (Y direction) of a rotating shaft 21 described later. The vertical (Z direction) interval between the upper row of rotators 2 and the lower row of rotators 2 is configured to become narrower from the supply port 10a side to the discharge port 10b side (X2 direction). I have. The rotating bodies 2 in the upper row and the lower row are arranged so as to be inclined obliquely upward from the supply port 10a side toward the discharge port 10b side (X2 direction).

  Further, the plurality of rotating bodies 2 in the lower row are arranged at predetermined intervals, and are configured to convey a solid component by rotating in the same direction (clockwise in FIG. 2). The plurality of rotating bodies 2 in the upper row are arranged at a predetermined interval, and are configured to convey a solid component by rotating in the same direction (counterclockwise in FIG. 2). I have.

  The rotating body 2 includes a laminated rotating filter body 20 and a rotating shaft 21 extending in the Y direction. Each of the laminated rotary filter body 20 and the rotary shaft 21 is provided with a key groove. The laminated rotary filter body 20 and the rotating shaft 21 are configured to rotate in synchronization with each other by a key (engaging member) fitted into the key groove. The rotating shaft 21 passes through the pair of side plates 11 and is supported by bearings outside the processing tank 1. A motor (not shown) that applies a driving force (torque) to the rotating body 2 is provided at an end of the rotating shaft 21.

  As shown in FIG. 3, the laminated rotary filter body 20 includes a plurality of medium-diameter disc filter pieces 22, a plurality of small-diameter disc filter pieces 23, and a plurality of large-diameter disc filter pieces 24. The medium-diameter disc filter piece 22 has a diameter d2 larger than the diameter d1 of the small-diameter disc filter piece 23 (d1 <d2). Further, the large-diameter disc filter piece 24 has a diameter d3 larger than the diameter d2 of the medium-diameter disc filter piece 22 (d2 <d3). The medium-diameter disc filter piece 22 is formed of a resin material. The small-diameter disc filter piece 23 and the large-diameter disc filter piece 24 are formed of a metal material. The medium-diameter disc filter piece 22, the small-diameter disc filter piece 23, and the large-diameter disc filter piece 24 are each an example of the "filter piece" in the claims.

  With the large-diameter disc filter piece 24 having the largest diameter in the stacked rotary filter body 20 biting into the object to be processed and rotating in synchronization with the rotation of the rotating shaft 21, the object to be processed is discharged. It can be transported to the outlet 10b.

  The laminated rotary filter body 20 alternately arranges (stacks) large-diameter disc filters 24 and small-diameter disc filters 23 between a plurality of medium-diameter disc filter pieces 22 arranged in contact with each other in the Y direction. It is constituted by. The laminated rotary filter body 20 is formed between filter pieces (medium-diameter disc filter piece 22, small-diameter disc filter piece 23, and large-diameter disc filter piece 24) laminated along the axial direction (Y direction) of the rotating shaft 21. , A filtration groove (gap) G is formed.

  Specifically, as shown in FIG. 4, a plurality of convex portions 22 a and a plurality of convex portions 22 b protruding in the Y direction are provided on one surface and the other surface of the medium-diameter disc filter piece 22, respectively. I have. The plurality of protrusions 22a and the plurality of protrusions 22b are provided at substantially equal angular intervals (90-degree intervals) in the circumferential direction of the medium-diameter disc filter piece 22. Note that the protrusion amount of the protrusion 22a is sufficiently larger than the protrusion amount of the protrusion 22b. A gap is formed between the adjacent medium-diameter disk filter pieces 22 in which the projections 22a and the projections 22b are in contact with each other and the small-diameter disk filter 23 or the large-diameter disk filter 24 is disposed. In the Y direction, a filter is provided between the medium-diameter disc filter piece 22 and the small-diameter disc filter piece 23 and between the medium-diameter disc filter piece 22 and the large-diameter disc filter piece 24, respectively. A filtration groove G (gap) (see FIG. 3) for discharging the liquid is formed.

  The small-diameter disc filter piece 23 is provided with a plurality of notches 23a on the outer periphery thereof that engage with the projections 22a and 22b. The plurality of notches 23a are provided at substantially equal angular intervals (90-degree intervals) in the circumferential direction of the small-diameter disc filter piece 23. The thickness of the small-diameter disc filter piece 23 is smaller than the protrusion amount of the projection 22a. For this reason, the small-diameter disc filter piece 23 is configured to be swingable in the axial direction (Y direction) of the rotating shaft 21 in a state of being engaged with the convex portions 22a and 22b.

  The large-diameter disc filter piece 24 is provided with a plurality of through holes 24a that fit into the convex portions 22a and 22b. The plurality of through-holes 24a are provided at substantially equal angular intervals (90-degree intervals) in the circumferential direction of the large-diameter disc filter piece 24. The thickness of the large-diameter circular disc piece 24 is smaller than the protrusion amount of the convex portion 22a. For this reason, the large-diameter disc filter piece 24 is configured to be swingable in the axial direction (Y direction) of the rotating shaft 21 in a state of being engaged with the convex portions 22a and 22b. The large-diameter disc filter piece 24 has substantially the same thickness as the small-diameter disc filter piece 23.

  As shown in FIG. 2, the sealing member 3 is provided so as to fill a gap between the inner surface of the side plate 10 provided with the supply port 10 a of the processing tank 1 and the uppermost rotating body 2 in the lower row. I have. With this seal member 3, the multi-disc dehydrator 100 allows the processing target (processing target containing a large amount of solids) supplied from the supply port 10a to flow out to a filtrate storage unit (not shown) as it is. Is prevented from doing so.

  The scraper 4 is provided between the side plate 10 provided with the discharge port 10b of the processing tank 1 and the lowermost rotating body 2 in the lower row, and between the side plate 10 provided with the discharge port 10b of the processing tank 1 and the uppermost row. Each is provided between the downstream rotating body 2 and the rotating body 2. The scraper 4 is configured to scrape solid matter clogged in the lowermost layered rotary filter 20.

  The discharge chute 5 is provided at the discharge port 10b, and constitutes a discharge path for the object to be processed (dehydrated cake) discharged from the processing tank 1. The discharge chute 5 is inclined obliquely downward from the processing tank 1 side, and is configured to send (guide) an object to be processed (a dehydrated cake) to a hopper (not shown) or the like. The discharge chute 5 is provided with a flapper 51 and a flapper pressing screw 52 for pressurizing the object to be processed (dehydrated cake) discharged from the discharge port 10b.

(Configuration of disk member)
As shown in FIG. 4, the disk member 6 is formed of a metal material similarly to the small-diameter disk filter piece 23 and the large-diameter disk filter piece 24. The disk member 6 has a plate-like ring shape whose thickness direction is the Y direction. The rotating member 21 is configured to be inserted through the disk member 6. The disk member 6 is provided with a plurality (four) of key grooves 6a. The disk member 6 is rotated by a key (engaging member) fitted into the key groove 6a (any one of the four key grooves) in synchronization with the rotating shaft 21 (laminated rotating filter body 20). It is configured to be rotatable with the shaft 21.

  As shown in FIG. 3, the disc member 6 has a diameter larger than the maximum diameter of the filter pieces (medium-diameter disc filter piece 22, small-diameter disc filter piece 23, and large-diameter disc filter piece 24). I have. That is, the disk member 6 has a diameter d larger than the diameter d3 of the large-diameter disk filter piece 24 (d3 <d). As an example, the diameter of the medium-diameter disc filter 22 is 106 mm, the diameter of the large-diameter disc filter 24 is 129 mm, and the interval between the rotating shafts 21 of the adjacent rotating bodies 2 (the outer surface of the rotating shaft 21 is When the distance between the outer surface of the other rotating shaft 21 and the outer surface is 106 mm, the diameter of the disk member 6 is 156 mm at the maximum. The disc member 6 has substantially the same thickness as the small-diameter disc filter piece 23 and the large-diameter disc filter piece 24.

  Since the disk member 6 has a larger diameter than the large-diameter disk filter piece 24, the disk member 6 is made to bite into the object to be processed more than the large-diameter disk filter piece, thereby increasing the propulsive force on the object. A large area can be secured. As a result, the disc member 6 can convey the workpiece with a greater force than the large-diameter disc piece 24.

  The radius (d / 2) of the disk member 6 is obtained by subtracting the radius R (see FIG. 2) of the rotating shaft 21 from the distance D (see FIG. 2) between the rotation center axes α of the two adjacent rotating bodies 2. Smaller than the value (d / 2 <DR). Specifically, the radius of the disk member 6 is substantially the same as the value obtained by subtracting the size of the key (engaging member) fitted into the key groove of the rotating shaft 21 from the value obtained by subtracting the radius R from the distance D. (A value slightly smaller than the value obtained by subtracting the size of the key (engaging member)).

  The disk member 6 is provided between the laminated rotary filter body 20 and the side plate 11. The disk members 6 are provided on both sides of the laminated rotary filter body 20 in the axial direction (Y direction) of the rotary shaft 21. The disk member 6 is provided in a state of being in contact with the end face of the convex portion 22 a or the convex portion 22 b of the medium-diameter disk filter piece 22. The disk members 6 are provided alternately for a plurality of adjacent rotating bodies 2 so as to overlap with each other in the upper and lower two rows.

  However, the disk member 6 is provided between the lowermost rotating body 2 and the most downstream rotating body 2 in the direction in which the solid component of the processing object is sent, among the plurality of lower rotating bodies 2. Is provided. That is, the disk member 6 is not provided on the most upstream and most downstream rotating bodies 2 among the plurality of rotating bodies 2 in the lower row. This is to avoid interference between the disk member 6 provided on the lower row of rotating bodies 2 and the seal member 3 (see FIG. 2) and the scraper 4 (see FIG. 2).

  The disk member 6 is provided on the rotating body 2 located upstream of the most downstream rotating body 2 among the plurality of rotating bodies 2 in the upper row. That is, the disk member 6 is not provided on the most downstream rotating body 2 among the plurality of rotating bodies 2 in the upper row. This is to avoid interference between the disk member 6 provided on the upper row of rotating bodies 2 and the scraper 4.

  Specifically, the disk members 6 are respectively provided on the second, fourth, and sixth rotating bodies 2 of the plurality of (six) rotating bodies 2 in the upper row, counting from the most downstream side. The disk members 6 are respectively provided on the second, fourth, and sixth rotating bodies 2 counted from the most downstream side among the plurality (eight) of rotating bodies 2 in the lower row. The plurality of disk members 6 provided in the multiple disk dehydrator 100 have the same diameter.

  Between the side plate 11 and the disk member 6, both the side plate 11 and the disk member 6 are in contact with each other, and the disk member 6 (diameter d) and the filter piece (the diameter d 1 of the small-diameter disk filter piece 23, An annular spacer member 7 having a diameter d0 smaller than the diameter d2 of the diameter disk filter piece 22 and the diameter d3 of the large diameter disk filter piece 24 is provided (d0 <d1 <d2 <d3).

  The spacer member 7 has substantially the same thickness as the disk member 6 or has a smaller thickness than the disk member 6. That is, by providing the spacer member 7, the spacer member 7 has a predetermined thickness such that the object to be processed does not easily enter the space between the disk member 6 and the side plate 11.

(Effect of this embodiment)
In the present embodiment, the following effects can be obtained.

  In the present embodiment, as described above, the workpiece near the side plate 11 can be sent to the discharge port 10b by rotating the disk member 6 together with the rotating body 2. Further, since the disk member 6 has a diameter larger than the maximum diameter of the filter pieces (medium diameter disk filter piece 22, small diameter disk filter piece 23, and large diameter disk filter piece 24), the disk member 6 is larger than the filter piece. In addition, it is possible to secure a large area for generating a propulsive force for the object by largely penetrating the object to be processed, and a propulsive force larger than the filter piece in the vicinity of the side plate 11 where the disk member 6 is disposed. Can be given to the object to be treated. As a result of the above, a large propulsive force is applied to the object to be processed in the axial direction of the rotary shaft 21 where a large frictional force (brake) is generated with respect to the object to be processed. Can be discharged from the discharge port 10b while the feed amount is equalized, and the object to be processed (dehydrated cake) can be efficiently discharged from the discharge port 10b.

  In the present embodiment, as described above, the disk members 6 are provided on both sides of the laminated rotary filter body 20 in the axial direction of the rotary shaft 21. Thus, the processing object near the side plate 11 on both sides of the stacked rotary filter body 20 can be effectively sent to the discharge port 10b. As a result, the object to be processed (dewatered cake) can be more efficiently discharged from the discharge port 10b.

  Further, in the present embodiment, as described above, the filter pieces are a plurality of small-diameter disc filter pieces 23, a plurality of medium-diameter disc filter pieces 22 having a diameter larger than the small-diameter disc filter pieces 23, and It has a plurality of large-diameter disc filters 24 having a diameter larger than the large-diameter disc filter piece 22, and the disc member 6 has a larger diameter than the large-diameter disc filter piece 24. As a result, the disk member 6 has a diameter larger than the diameter of the large-diameter disk filter piece 24, so that the disk member 6 does not penetrate the workpiece much more than the large-diameter disk filter piece 24. A large area for generating a propulsive force for the workpiece can be secured, and the workpiece is conveyed with a larger force than the large-diameter disc filter 24 in the vicinity of the side plate 11 where the disk member 6 is disposed. Can be. As a result, a large propulsive force can be applied to the object to be processed on the outside of the rotary shaft 21 in the axial direction where a large frictional force (brake) is generated with respect to the object to be processed. Cake) can be discharged more efficiently.

  Further, in the present embodiment, as described above, the rotating bodies 2 are provided in a plurality of upper and lower two rows from the supply port 10a side of the workpiece to the discharge port 10b side. The disk members 6 are provided adjacent to each other so as to overlap each other, and at least every other disk member 6 is provided for a plurality of rotating bodies 2 adjacent to each other in two upper and lower rows. Thereby, the plurality of disk members 6 can be arranged without interfering with each other in a direction orthogonal to the axial direction of the rotating shaft 21.

  In the present embodiment, as described above, between the side plate 11 and the disk member 6, both the side plate 11 and the disk member 6 are in contact, and the disk member 6 and the small-diameter disk A spacer member 7 having a smaller diameter is provided. Accordingly, the resistance (rotation between the side plate 11 and the disk member 6) applied to the rotating body 2 when the side plate 11 (the inner surface of the side plate 11) is brought into direct contact with the disk member 6 without providing the spacer member 7. As compared with the force applied to the rotating body 2 by friction, the resistance applied to the rotating body 2 (between the disk member 6 and the spacer member 7 or between the side plate 11 and the spacer member 7 due to friction). ) Can be reduced.

  Further, in the present embodiment, as described above, the disk member 6 includes the most upstream rotating body 2 and the most downstream rotating body 2 of the plurality of rotating bodies 2 in the lower row in the direction of sending the solid component of the processing object. , And is provided on the rotating body 2 located on the upstream side of the most downstream rotating body 2 among the plurality of rotating bodies 2 in the upper row. Here, in a general multi-disc dehydrator, a scraper (a member that scrapes solids from the rotating body) is provided on each of the lowermost rotating bodies in the upper and lower rows, and the most upstream rotating body in the lower row is provided on the lowermost rotating bodies. A seal member (a member that fills a gap between the rotating body and the inner surface of the processing tank) is provided. Thereby, it is possible to prevent the disk member 6, the scraper 4, and the seal member 3 from interfering with each other.

  In the present embodiment, as described above, the radius of the disk member 6 is smaller than a value obtained by subtracting the radius of the rotating shaft 21 from the distance between the rotation center axes of the adjacent rotating bodies 2. Thereby, it is possible to prevent the disk member 6 from interfering with the rotating shaft 21 of the adjacent rotating body 2.

[Modification]
It should be understood that the embodiments disclosed this time are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description of the embodiments, and includes all equivalents (modifications) within the scope and meaning equivalent to the claims.

  For example, in the above-described embodiment, an example is shown in which a disk member is provided in a part of the plurality of rotating bodies, but the present invention is not limited to this. In the present invention, disk members may be provided on all the rotating bodies. Further, the disk member may be provided on a rotating body different from the rotating body shown in the above embodiment. However, when a disk member is provided on the most downstream rotating body in the upper row (lower row), it is necessary to change the shape of the scraper in order to avoid interference between the disk member and the scraper. Further, in the case where a disk member is provided on the most upstream rotating body in the lower row, it is necessary to change the shape of the seal member in order to avoid interference between the disk member and the seal member.

  Further, in the above-described embodiment, the example in which the disk members are provided on both sides of the laminated rotary filter body in the axial direction of the rotary shaft has been described, but the present invention is not limited to this. In the present invention, a disk member may be provided inside the laminated rotary filter in the axial direction of the rotary shaft. Further, a disk member may be provided only on one side of the laminated rotary filter in the axial direction of the rotary shaft.

  Further, in the above-described embodiment, an example is described in which the number of rotating bodies in the upper row is six and the number of rotating bodies in the lower row is eight, but the present invention is not limited to this. In the present invention, the number of rotating bodies in the upper row may be plural other than six. Further, the number of rotating bodies in the lower row may be a plurality other than eight.

  Further, in the above-described embodiment, an example is shown in which a plurality of disk members provided in the multiple disk dehydrator are formed to have the same diameter as each other, but the present invention is not limited to this. In the present invention, the plurality of disc members provided in the multiple disc dehydrator may be formed so as to have mutually different diameters.

  Further, in the above embodiment, the example in which the disk member is formed of the metal material is described, but the present invention is not limited to this. In the present invention, the disk member may be formed of a material other than a metal material such as a resin material.

  In the above-described embodiment, an example is described in which a spacer member that contacts both the side plate and the disk member is provided between the side plate and the disk member. However, the present invention is not limited to this. In the present invention, the side plate and the disk member may be arranged in direct contact with each other without providing the spacer member.

  Further, in the above embodiment, an example is shown in which the disk member is formed to have substantially the same thickness as the small-diameter disk filter and the large-diameter disk filter, but the present invention is not limited to this. In the present invention, the disc member may be formed to have a smaller thickness or a larger thickness than the small-diameter disc filter and the large-diameter disc filter.

DESCRIPTION OF SYMBOLS 1 Processing tank 2 Rotating body 6 Disc member 7 Spacer member 10a Supply port 10b Discharge port 11 Side plate 20 Laminated rotary filter 21 Rotating shaft 22 Medium diameter disk filter (filter)
23 small diameter disc filter (filter)
24 Large-diameter disc filter (filter)
100 Multi-disc dehydrator G Filtration groove

Claims (7)

A rotary shaft, including a plurality of filter pieces stacked along the axial direction of the rotary shaft, including a stacked rotary filter body having a filtration groove formed between the filter pieces, adjacent to each other in two upper and lower rows A plurality of rotating bodies provided
In the axial direction of the rotating shaft, a processing tank including a pair of side plates provided so as to sandwich the laminated rotary filter,
A multi-disc type dehydrator having a diameter larger than the maximum diameter of the filter piece and comprising a disc member provided between the side plate and the laminated rotary filter so as to be rotatable with the rotary body; Machine.   2. The multi-disc dehydrator according to claim 1, wherein the disc members are provided on both sides of the stacked rotary filter body in the axial direction of the rotation shaft. 3. The filter pieces are a plurality of small-diameter disc filter pieces, a plurality of medium-diameter disc filter pieces having a diameter larger than the small-diameter disc filter pieces, and a plurality of diameters larger than the medium-diameter disc filter pieces. With a large diameter disc filter
The multi-disc dehydrator according to claim 1, wherein the disc member has a larger diameter than the large-diameter disc filter. The rotating body is provided in a plurality of upper and lower two rows from the supply port side of the workpiece to the discharge port side, and is arranged adjacent to each other so as to overlap each other when viewed from the axial direction,
The multiplex circle according to any one of claims 1 to 3, wherein the disk member is provided at least every other one of the plurality of rotating bodies adjacent to each other in two upper and lower rows. Plate type dehydrator.   A spacer member is provided between the side plate and the disk member, the spacer member being in contact with both the side plate and the disk member and having a smaller diameter than the disk member and the filter piece. Item 5. The multi-disc dehydrator according to any one of Items 1 to 4.   The disk member is provided on the rotating body positioned between the most upstream rotating body and the most downstream rotating body in the direction of sending the solid component of the processing target among the plurality of rotating bodies in the lower row. The multiplexing device according to any one of claims 1 to 5, wherein the multiplexing member is provided on the rotating body positioned upstream of the most downstream rotating body among the plurality of rotating bodies in the upper row. Disk type dehydrator.   The multiplex disk according to any one of claims 1 to 6, wherein a radius of the disk member is smaller than a value obtained by subtracting a radius of the rotation axis from a distance between rotation center axes of adjacent rotators. Mold dehydrator.

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