JP6099547B2 - Vertical screw press filtration device - Google Patents

Description

  The present invention provides an inner and outer filter body fixed in a cylindrical shape or a conical shape around an axis extending in the longitudinal direction, and a ribbon that is accommodated between the inner and outer filter bodies and rotated around the axis line. The present invention relates to a vertical screw press type filtration device provided with a screw.

  As such a vertical screw press type filtration device, for example, in Patent Document 1, a coil-like ribbon screw arranged vertically is arranged in an annular space between a filtration inner cylinder and a filtration outer cylinder arranged concentrically. Inserting and conveying the object to be processed upward by the rotation of the ribbon screw, while separating the solid and liquid by the filtration inner cylinder and the filtration outer cylinder formed by a mesh-like member, the upper part from the upper end of the annular space There has been proposed a structure in which a solid content (filter cake) is discharged into a casing and sent out to a discharge pipe.

JP-A-10-080795

  Here, in the vertical screw press-type filtration device described in Patent Document 1, a dewatering plug that rotates in synchronization with the ribbon screw and is separated from the blade portion on the ribbon screw on the discharge side of the filter cake. Is mounted in the upper casing, and the dewatering plug is used to reduce the volume of the object to be processed for dehydration. Further, the filtered cake of the object to be processed, which has been reduced in volume by the dewatering plug and dehydrated, is sent to the discharge pipe by the blades installed in the dewatering plug and discharged.

  However, in such a vertical screw press type filtration device described in Patent Document 1, the filter cake discharged to the outer periphery over the entire circumference of the upper end of the annular space rotates in synchronization with the ribbon screw. It is only scraped off by the blades installed on the dewatering plug and sent out to the discharge pipe. For this reason, the filter cake scraped to the rotation direction side of the blades accumulates until the blades reach the discharge pipe, and the filter cake may be blocked in the upper casing.

  When such a filter cake blockage occurs, the filter cake must be temporarily interrupted to remove the blocked filter cake, and the work efficiency is significantly reduced. Therefore, a large load may also act on the rotating means of the ribbon screw to cause damage. Furthermore, if the filter cake that has become a lump of non-uniform size due to accumulation is discharged even if it is not blocked, a filter cake conveyor, insertion equipment, incineration equipment, etc. will be provided at the subsequent stage of the filtration device. In such a case, the load on these facilities also increases, and a cake crusher or the like must be provided separately.

  The present invention has been made under such a background, and does not cause accumulation or clogging of a filter cake obtained by filtering an object to be processed, enables efficient filtration work, and means for rotating a ribbon screw. Another object of the present invention is to provide a vertical screw press type filtration device that places little load on various facilities in the subsequent stage.

In order to solve the above-described problems and achieve such an object, the present invention provides an inner filter body fixed in a cylindrical or conical shape around an axis extending in the longitudinal direction, and the inner filter. An outer filter body which is formed in a cylindrical shape or a conical shape coaxial with the body, and is fixed to the outside of the inner filter body with a space therebetween, and a spiral shape which is twisted around the axis, and the inner filter body and the outer filter body A ribbon screw which is accommodated in a filtration space between the two and is rotated about the axis, and the workpiece supplied to the lower part of the filtration space is conveyed upward by the ribbon screw while the inner part is being conveyed. A vertical screw press type filtration device for filtering by a filter body and an outer filter body, wherein a turntable having an opening at the upper end portion of the outer filter body is provided around the axis on the outer periphery of the upper end portion of the outer filter body. This is provided so that it can rotate. On over down table, the filter cake of the object to be treated discharged from the upper end of the filtration space is sequentially discharged over the entire circumference of the opening, on the turntable, standing on the turntable A cake cutter that divides the filter cake in the circumferential direction of the turntable in the form of a plate is provided to extend toward the outer periphery around the opening so as to rotate integrally with the turntable. In addition, on the outer peripheral side of the cake cutter, a guide for guiding the divided filter cake to the cake discharge port is fixed to the rotating turntable and the cake cutter so as not to rotate. It is characterized by that.

  In such a vertical screw press type filtration apparatus, the filtration cake of the object to be processed which is supplied to the lower part of the filtration space and is conveyed upward by the ribbon screw and filtered by the inner and outer filter bodies is the upper end portion of the outer filter body. Are sequentially discharged over the entire circumference of the opening on the turntable having an opening at the top, and are pushed out to the outer peripheral side while rotating together with the turntable. A cake cutter that can rotate integrally with the turntable extends around the opening of the turntable so as to extend toward the outer peripheral side, and the filter cake discharged on the turntable is As it is pushed out to the outer peripheral side while rotating, it is divided in the circumferential direction by this cake cutter.

  Further, on the outer peripheral side of the cake cutter, a turntable that rotates integrally with the cake cutter and a guide that is fixed to be non-rotating with respect to the cake cutter are disposed, and the cake cutter is being divided in the circumferential direction by the cake cutter. The filter cake pushed to the outer peripheral side is guided by this guide by the rotation of the turntable, led to the cake discharge port, and discharged. Therefore, according to the vertical screw press type filtration device having the above-described configuration, the filter cake is divided and discharged by the cake cutter, so that no accumulation or clogging occurs, the interruption of the filtration operation is prevented, and the ribbon screw or the turn It is possible to suppress an increase in load on the table rotating means and the subsequent equipment, and the cake crusher can be dispensed with.

Here, even if the cake cutter extends in the radial direction with respect to the axis, for example, the filter cake can be divided in the circumferential direction by the extrusion to the outer peripheral side by the discharged filter cake and the rotation of the turntable. , the outer periphery of said cake cutter, by arranging to be inclined so as to extend toward the rear side in the rotation direction of the turntable toward the outer peripheral side of the turntable, also the filter cake by the inclination of the cake cutter The filter cake can be pushed out to the side, and the accumulation and clogging of the filter cake can be prevented more reliably.

  Moreover, including the case where it inclines in this way, a filter cake can be divided | segmented further finely by providing several cake cutters on the said turntable radially. In this case, by arranging these cake cutters at equal intervals in the circumferential direction of the turntable, the size of the filter cake to be divided can be made uniform, and a cake crusher is used. At least, it is possible to reduce the load on the subsequent equipment more reliably.

  On the other hand, if the guide has a plate-like shape facing the rotation direction of the turntable and is arranged to extend toward the rotation direction of the turntable as it goes toward the outer periphery of the turntable, The filtered cake that has been extruded and divided by the cake cutter can be smoothly guided to the outer peripheral side by the rotation of the turntable and discharged from the cake discharge port.

  As described above, according to the present invention, the filtration cake can be prevented from being accumulated and blocked, and an efficient filtration operation can be performed. Also, the rotating means for rotating the ribbon screw and the turntable, and the subsequent equipment of the filtration device It becomes possible to reduce the load on.

It is a longitudinal cross-sectional view which shows one Embodiment of this invention. It is a perspective view which shows the cake discharge chamber of embodiment shown in FIG. It is a top view which shows the cake discharge chamber of embodiment shown in FIG. It is a partially broken perspective view which shows the inside / outside filter body of embodiment shown in FIG. It is a partially broken perspective view which shows the ribbon screw of embodiment shown in FIG. It is a partially broken perspective view which shows the state by which the ribbon screw was accommodated between the inner and outer filter bodies of embodiment shown in FIG. 1 (however, illustration of a connection member is abbreviate | omitted).

  1 to 6 show an embodiment of the present invention. In the present embodiment, the inner filter body 1 and the outer filter body 2 are both cylindrical with an axis O extending in the vertical vertical direction as shown in FIG. 1 and FIG. The inner diameter of the outer filter body 2 disposed outside the inner filter body 1 is made larger than the outer diameter of the inner filter body 1 disposed on the radially inner side. Is formed with a cylindrical filtration space S centered on the axis O.

  Here, in the present embodiment, the inner filter body 1 and the outer filter body 2 are divided into a plurality (two in the present embodiment) of the inner filtration structure 1A and the outer filtration structure in the axis O direction. 2A, respectively. These inner and outer filtration components 1A and 2A are each formed by attaching a filtering medium such as a wire mesh to a main body formed in a cylindrical shape by a perforated metal plate such as punching metal, and each has the same shape and size. Is formed. In addition to the punching metal, a screen such as a wedge wire or a wire mesh, a filter cloth, or the like can also be used as the inner and outer filtration structures 1A and 2A.

  Further, between the both ends of the main body of the inner and outer filtration structural bodies 1A and 2A in the direction of the axis O and, if necessary, between the inner filtration structural body 1A and the outer filtration structural body 2A so as to protrude to the inner peripheral side. Are each provided with an annular plate-like flange portion so as to protrude to the outer peripheral side. In addition, on the inner and outer peripheries of the inner and outer filtration components 1A and 2A, plate-like rib portions extending between the flange portions at both ends along a plane including the axis O are provided.

  Among these, the outer filter body 2 includes a plurality of outer filter structures 2A that are coaxially stacked one above the other, and a flange section at the lower end of the upper outer filter structure body 2A and a flange section at the upper end of the lower outer filter structure body 2A. And these flange portions are connected together by bolting or the like to be integrated. Further, the outer filter body 2 has an axis O when the flange portion at the upper end of the uppermost outer filter structure 2A is joined to the substrate 3 laid horizontally at a predetermined height by bolting or the like. The substrate 3 is suspended and supported from the upper end side in the direction, and is fixed to the substrate 3.

  Here, the substrate 3 is formed, for example, by forming a circular through-hole centered on the axis O as a discharge hole 3A in the center of a square plate centered on the axis O, The inner diameter is substantially equal to the inner diameter of the outer filter body 2, and the upper end of the outer filter body 2 is joined to the periphery of the discharge hole 3 </ b> A on the lower surface of the substrate 3. Further, the substrate 3 is supported at a predetermined height as described above by joining pillars and the like (not shown) at the four corners of the lower surface thereof.

  A cylindrical vertical wall 4A, also centered on the axis O, is erected on the upper surface of the substrate 3. A cake discharge port 4B is opened in the vertical wall 4A, and an upper portion of the vertical wall 4A. Is covered with a lid 4C. A portion of the substrate 3 surrounded by the vertical wall 4A and the lid 4C communicates with the filtration space S through the discharge hole 3A, and is a filtered cake of the object to be processed filtered by the inner and outer filter bodies 1 and 2. The cake discharge chamber 4 is discharged.

  On the bottom surface of the cake discharge chamber 4, an annular plate-like turntable 4 </ b> D centering on the axis O is discharged on the substrate 3 with the central opening positioned at the upper end of the outer filter body 2. It is arranged from the outer periphery of the hole 3A to the inside of the vertical wall 4A, and is supported so as to be rotatable around the axis O. The lower surface portion of the turntable 4D has a smaller diameter than the upper surface portion, and a gear is formed on the outer peripheral surface of the lower surface portion so as to circulate around the axis O, and a drive gear meshing with the gear is provided. The turntable 4D can be rotated about the axis O in the rotation direction T shown in FIGS. 2 and 3 by the provided table rotation means 4E such as a speed reducer.

  And on this turntable 4D, the cake cutter 4F which divides | segments the said filtration cake discharged | emitted from the upper end part of the said filtration space S to the circumferential direction of turntable 4D is turntable 4D so that rotation is possible integrally with this turntable 4D. It arrange | positions so that it may extend toward the outer peripheral side around the opening part of 4D center. Further, on the outer peripheral side of the cake cutter 4F, a guide 4G for guiding the divided filter cake to the cake discharge port 4B is prevented from rotating at intervals with respect to the rotating turntable 4D and the cake cutter 4F. That is, it is fixed and non-rotatably arranged.

  The cake cutter 4F is in the form of a rectangular plate that is erected vertically on the upper surface of the turntable 4D. In this embodiment, a plurality (eight) cake cutters 4F of the same shape and the same size are arranged around the turntable 4D. They are arranged radially at equal intervals in the direction. Each cake cutter 4F has a shape bent one step at an obtuse angle in a plan view viewed from the direction of the axis O as shown in FIG. 3, and one of the bent portions is the turntable 4D. It inclines and extends so that it may be located in the inner peripheral side and goes to the back side of the said rotation direction T of turntable 4D as it goes to an outer peripheral side.

  Further, the other portion of the folded portion of the cake cutter 4F is located on the outer peripheral side of the turntable 4D of the one portion and extends in a tangential direction of a circle centering on the axis O, and the other portion. The cake cutter 4F can rotate integrally with the turntable 4D by attaching and fixing the portion to the upper surface of the turntable 4D. In addition, in the said planar view, the said one part of the cake cutter 4F is made longer than the other part.

  Further, the inner peripheral end of the cake cutter 4F is disposed so as to protrude slightly to the inner peripheral side from the opening at the center of the turntable 4D. In this embodiment, the radial width of the cake cutter 4F with respect to the axis O is sufficiently smaller than the width of the turntable 4D in the same radial direction, and the inner periphery of the turntable 4D is shown in FIGS. The cake cutter 4F is disposed only in a limited range on the side. Furthermore, the height of the cake cutter 4F from the upper surface of the turntable 4D is made sufficiently smaller than, for example, the height to the lid 4C in the cake discharge chamber 4.

  Further, the guide 4G has a rectangular plate shape perpendicular to the upper surface of the turntable 4D. As shown in FIG. 1, the guide 4G is slightly spaced from the upper surface of the turntable 4D, and the edge on the rotation direction T side of the cake discharge port 4B of the vertical wall 4A that forms the cake discharge chamber 4 is illustrated. By supporting the lid 4C via a bracket or the like that is not fixed, it is fixed in the cake discharge chamber 4 so as to face the rotation direction T, and is rotated with respect to the turntable 4D and the cake cutter 4F that rotate as described above. It is attached non-rotating.

  Further, the guide 4G has a height from the top surface of the turntable 4D higher than the cake cutter 4F as shown in FIGS. 1 and 2, and in a plan view seen from the direction of the axis O, as shown in FIG. Extending slightly from the inner peripheral side of the cutter 4F toward the outer peripheral side of the turntable 4D from the inner peripheral side toward the outer peripheral side of the turntable 4D from the inner peripheral side. However, a rectangular cutout as shown in FIGS. 1 and 2 is formed at the lower end of the inner periphery of the guide 4G, so that the cake cutter 4F that rotates together with the turntable 4D can pass at a slight interval so as not to interfere. It is said that.

  Around the discharge hole 3A on the substrate 3, an annular seal member 3B having an inner diameter equal to the discharge hole 3A and an outer diameter slightly smaller than the inner diameter of the turntable 4D is attached. It has been. The upper ridge portion of the seal member 3B is chamfered at the intersecting ridge line portion between the inner peripheral portion and the upper surface portion of the seal member 3B on the outer peripheral side of the chamfered portion is the same as the axis O of the upper surface portion of the turntable 4D. The height in the direction is substantially equal. The cake cutter 4F and the inner peripheral end of the guide 4G that protrude to the inner peripheral side from the opening at the center of the turntable 4D are positioned on the outer peripheral side of the chamfered portion.

  Further, a gear chamber 5 including a vertical wall 5A and a lid 5B is provided on the upper portion of the lid 4C in the same manner as the cake discharge chamber 4, and the lid 5B of the gear chamber 5 and the cake discharge chamber 4 are provided. Each of the lids 4C is formed with a circular hole centered on the axis O. And the internal filter body 1 comprised by the said some internal filtration structure 1A is also attached to the cover body 5B of the gear chamber 5 via the internal filtration support body 6 in this embodiment, and it is from the upper end side of an axis line O direction. It is fixed by being suspended and supported.

  Here, the inner filtration support 6 includes an inner cylindrical portion 6A whose outer peripheral surface forms a cylindrical surface centered on the axis O, and particularly in this embodiment, the entire outer peripheral surface of the inner filtration support 6 is this. The outer diameter of the inner filtration support 6 (inner cylindrical portion 6A) is made equal to the outer diameter of the inner filtration body 1. The inner diameter of the circular hole formed in the lid 5B is slightly larger than the outer diameter of the inner filtration support 6, and the inner diameter of the circular hole formed in the lid 4C is the same as that of the lid 5B. It is made slightly larger than the inner diameter of the circular hole, but smaller than the inner diameter of the discharge hole 3A. Moreover, the flange part is formed also in the inner peripheral part of the inner-filtration support body 6 similarly to the inner-filtration structure 1A in the center part as both ends of the axis line O direction as needed.

  Further, in the same manner as the outer filter body 2, the inner filter body 1 also has a plurality of inner filter structures 1 </ b> A stacked on the same axis in the vertical direction, and a lower flange portion and a lower inner filter structure of the upper inner filter structure 1 </ b> A. It is configured by abutting the flange portion at the upper end of the body 1A. In addition, the lower end flange portion of the inner filtration support 6 also has a flange portion at the upper end of the uppermost inner filtration component 1A among the plural inner filtration components 1A constituting the inner filtration member 1 in this way. By being abutted, it is arranged coaxially with the inner filter body 1.

  Further, the inner filtration body 1 and the inner filtration support body 6 arranged coaxially in this manner have an inner filtration support flange 7A abutted against the flange portion at the upper end of the inner filtration support body 6 from the upper end side, An inner filtration support ring 7 </ b> B is abutted against the flange portion at the lower end of the inner filtration component 1 </ b> A at the lowest end of the inner filtration body 1 from the lower end side. The inner filtration support flange 7A has a cylindrical portion having an outer diameter equal to the outer diameter of the inner filter body 1 and the inner filtration support body 6 and substantially equal to the inner diameter of these flange portions, and an upper end of the outer peripheral surface of the cylindrical portion. And the outer diameter of the flange portion of the inner filtration support flange 7 </ b> A is larger than the inner diameter of the circular hole of the lid 5 </ b> B of the gear chamber 5. Further, the inner filtration support ring 7B is formed in a ring shape with a square cross section having an outer diameter equal to the inner filtration body 1 and the inner filtration support body 6 and an inner diameter substantially equal to these flange portions.

  Further, the inner filtration support flange 7A and the inner filtration support ring 7B, and the inner filter body 1 and the inner filtration support body 6 sandwiched between them, pass through the inner filtration support flange 7A and the inner filtration support ring 7B. A suspension bolt 7C inserted in parallel to the axis O into each inner flange portion of the inner filtration structure 1A and the inner filtration support 6 of the body 1 is screwed into the inner filtration support ring 7B, and the inner filtration support flange 7A. Are integrated by being fastened by a nut screwed from the upper end side. In the present embodiment, a plurality of suspension bolts 7C are inserted at equal intervals in the circumferential direction.

  In this way, the inner filter body 1 integrated coaxially with the inner filtration support flange 7A, the inner filtration support body 6 and the inner filtration support ring 7B has a circular shape of the lid bodies 5B and 4C from the inner filtration support ring 7B at the lower end. A hole is inserted into the inner periphery of the outer filter body 2 coaxially with the axis O through the hole and the discharge hole 3A, and the flange portion of the inner filter support flange 7A is in contact with the upper surface of the lid body 5B of the gear chamber 5 so as to be bolted. By being stopped, it is suspended and fixed from the upper end side in the axis O direction as described above. The height in the direction of the axis O of the upper and lower ends of the inner filter body 1 suspended and supported in this way is substantially equal to the height of the upper and lower ends of the outer filter body 2 that is also suspended and supported. The inner peripheral upper end of the filtration support flange 7A is covered with a lid 7D.

  The lower ends of the inner filter body 1 and the outer filter body 2 are coaxially connected by an annular member 8. The annular member 8 has an annular plate portion 8A having an inner diameter equal to the inner diameter of the inner filtration support ring 7B and an outer diameter substantially equal to the inner diameter of the outer filter body 2, and an outer peripheral edge of the annular plate portion 8A. The cylindrical portion 8B extending upward in the direction of the axis O is integrally formed, and the inner peripheral portion of the upper surface of the annular plate portion 8A and the upper end portion of the cylindrical portion 8B are the lower end surface of the inner filtration support ring 7B and the outer filter body. 2 is joined to the lower end flange portion of the lowermost outer filtration component 2A by bolting or the like, so that the lower end portions of the inner filter body 1 and the outer filter body 2 are coaxially and liquid-tightly connected.

  Further, a workpiece supply pipe 9 for supplying a workpiece to be filtered into the filtration space S is connected to the annular plate portion 8A of the annular member 8. The workpiece supply pipe 9 is disposed so as to open to the annular plate portion 8A, extend downward in parallel to the axis O, and then extend to the outer peripheral side along a plane perpendicular to the axis O. In the embodiment, the object to be processed is pumped from the lower side of the filtration space S through the object supply pipe 9 and supplied to the filtration space S. A plurality of workpiece supply pipes 9 may be connected to the annular plate portion 8A, for example, at equal intervals in the circumferential direction. In this embodiment, the two workpiece supply pipes 9 have an axis O between them. Are connected to opposite sides.

  Further, the outer peripheral side and lower space of the outer filter body 2 suspended from the substrate 3 are provided on the lower surface of the substrate 3 so as to surround the outer filter body 2 with a space from the outer filter body 2. It is covered with a bottomed rectangular cylindrical casing 10. The workpiece supply pipe 9 extends downward in the casing 10 and then extends to the outer peripheral side, and its end is connected so as to open to the outside of the wall surface of the casing 10. As shown in FIG.

  The space on the inner periphery of the inner filter body 1 is opened downward in the casing 10 via the inner filter support ring 7B and the inner periphery of the annular member 8, and the bottom surface of the casing 10 is 1 of the rectangular tube. 10 A of filtrate discharge holes are provided in the lower end part of the wall surface which inclines below toward one corner | angular part and cross | intersects this corner | angular part. When a plurality of workpiece supply pipes 9 are connected to the annular member 8 as described above, the workpiece supply pipes 9 extend downward in parallel to the axis O, and are perpendicular to the axis O, for example. It may be integrated into one on one plane and open to the wall surface of the casing 10.

  On the other hand, a ribbon screw 11 that is twisted around the axis O is accommodated in the filtration space S so as to be rotatable about the axis O. As shown in FIG. 1, the ribbon screw 11 has a plate-like material whose cross section along the axis O extends perpendicularly to the axis O toward the upper end side in the axis O direction toward the rear side in the rotational direction. In this embodiment, a plurality of (two) ribbon screws 11 are accommodated in the filtration space S as shown in FIG. 5, and these ribbon screws 11 are The leads have the same shape and the same size, and are disposed so as to be integrally rotatable at equal intervals in the circumferential direction.

  In addition, the ribbon screw 11 twisted around the axis O in this way is connected by a connecting member 11A at a portion facing the axis O direction. Therefore, in the present embodiment in which the two ribbon screws 11 are arranged at equal intervals in the circumferential direction, the portions of the ribbon screws 11 facing each other in the direction of the axis O are connected by the connecting member 11A, and in the circumferential direction. Are connected at a plurality of locations (for example, four locations) at equal intervals.

  The connecting member 11A is a plate-like member extending parallel to the axis O, and the thickness direction of the ribbon screw 11 in the radial direction is set to a radial direction with respect to the axis O as shown in FIG. Are joined to the ribbon screw 11 so as to connect the central portions thereof. However, the connecting member 11A connects the central portion of the width in the upper part of the ribbon screw 11 in the axis O direction, while connecting the inner peripheral edge and the outer peripheral edge of the ribbon screw 11 in the lower part as shown in FIG. Alternatively, the inner and outer peripheral edges may be connected over the entire length of the ribbon screw 11 in the axis O direction.

  Furthermore, the lower end edges of the ribbon screw 11 and the connecting member 11A are joined to an annular plate portion 11B perpendicular to the axis O, and the inner diameter of the annular plate portion 11B and the ribbon screw 11 is the same as that of the inner filter body 1. The outer diameter of the outer peripheral surface is set to a size that allows sliding contact with the inner peripheral surface of the outer filter body 2. However, a plurality of through-holes 11C are formed in the annular plate portion 11B at intervals in the circumferential direction so as to be spaced from the inner and outer peripheral edges and to avoid a joint portion between the ribbon screw 11 and the connecting member 11A. In addition, the workpiece supplied from the workpiece supply pipe 9 is supplied to the filtration space S through the through-holes 11C and can run on the ribbon screw 11.

  Further, a screw support 12 is attached to the upper ends of these ribbon screws 11, and the ribbon screw 11 is also connected to the upper end side in the axis O direction through the screw support 12 in the same manner as the inner and outer filter bodies 1 and 2. Suspended from and supported. In this embodiment, the screw support 12 has a cylindrical shape centering on an axis O that is slidably fitted to the outer periphery of the inner cylindrical portion 6A of the inner filtration support 6 with an inner diameter equal to the inner diameter of the ribbon screw 11. The outer cylindrical portion 12A is provided, and the lower end of the outer cylindrical portion 12A has a certain length in the circumferential direction on the inner periphery of the upper end of the ribbon screw 11 (for example, the length of the entire circumference in the circumferential direction for one ribbon screw 11). The screw support 12 is attached to the ribbon screw 11 so as to be rotatable integrally with the ribbon screw 11 by being joined along the twist of the ribbon screw 11.

  A pressing ring 3C is provided between the outer peripheral surface of the screw support 12 and the sealing member 3B attached to the upper surface of the discharge hole 3A of the substrate 3. The compression ring 3C includes an inner peripheral surface that forms a cylindrical surface centering on an axis O having an inner diameter that can rotate by sliding contact with an outer peripheral surface of the screw support 12, an upper surface that forms a flat surface perpendicular to the axis O, And an outer peripheral surface having a frustoconical surface centering on an axis O inclined upward toward the outer peripheral side, and the inclination of the outer peripheral surface is equal to the inclination of the chamfered portion of the seal member 3B. The outer diameter (radius) of the sealing member 3B is substantially equal to the outer diameter (radius) of the chamfered portion, and is smaller than the radius from the axis O to the inner peripheral ends of the cake cutter 4F and the guide 4G. Such a compression ring 3C is connected to a cylinder device (not shown) through an arm (not shown), supported so as to move up and down in the direction of the axis O without rotating, and a filter cake discharged from the discharge hole 3A. The water content is adjusted by squeezing.

  Further, a flange portion 12B is provided on the outer periphery of the upper end portion of the outer cylindrical portion 12A of the screw support body 12, and the flange portion 12B has a gear support ring 12C and an annular ring having a rectangular cross section as shown in FIG. A pinion gear 12E is attached via a flat gear support plate 12D. The gear support ring 12C and the gear support plate 12D have the same inner diameter as the outer cylindrical portion 12A, the gear support ring 12C is fixed on the flange portion 12B, and the gear support plate 12D is coaxially stacked thereon and fixed. . Further, the outer diameter of the gear support ring 12C is slightly larger than the flange portion 12B, and is sized so as to be slidably contacted with the circular hole of the lid body 4C of the cake discharge chamber 4, and the inner peripheral surface of the circular hole. A seal member (not shown) is interposed between the outer peripheral surface of the gear support ring 12C.

  Furthermore, the pinion gear 12E has an annular shape having an inner diameter larger than the outer diameter of the gear support ring 12C and smaller than the outer diameter of the gear support plate 12D, and an outer diameter larger than the outer diameter of the gear support plate 12D. The gear support ring 12C and the gear support plate 12D are coaxially attached to the lower surface of the outer peripheral portion of the gear support plate 12D, and a gear is formed on the outer peripheral surface thereof. Accordingly, an annular gap having a square cross section is formed between the outer periphery of the gear support ring 12C on the lower surface of the gear support plate 12D and the inner periphery of the pinion gear 12E.

  On the other hand, when the gear support ring 12C is inserted into the circular hole of the lid 4C on the upper surface of the lid 4C in the gear chamber 5, the gap on the lower surface of the gear support plate 12D is inserted. An annular bearing 5C is provided so as to be accommodated in the portion. The bearing 5C has an inner diameter larger than the outer diameter of the gear support ring 12C, and the outer diameter is sized to fit the inner peripheral surface of the pinion gear 12E. A bearing such as a ball bearing is provided on the outer peripheral surface of the pinion gear. The pinion gear 12 </ b> E is rotatably supported around the axis O so as to be interposed between the inner peripheral surface of 12 </ b> E. In this state, a slight gap is formed between the lower surface of the pinion gear 12E and the upper surface of the lid 4C and between the upper surface of the bearing 5C and the lower surface of the gear support plate 12D.

  Accordingly, by being supported by the bearing 5C in this way, the ribbon screw 11 is axially connected via the screw support 12 including the outer cylindrical portion 12A, the flange portion 12B, the gear support ring 12C, the gear support plate 12D, and the pinion gear 12E. It is supported by being suspended from the upper end side in the O direction. Further, a drive gear 5D that meshes with the pinion gear 12E is disposed in the gear chamber 5, and a screw rotating means 5E that includes a motor, a speed reducer, and the like is provided on the lid 5B of the gear chamber 5 to drive the gear. The ribbon screw 11 is rotated around the axis O via the screw support 12 by rotating the drive gear 5D by the screw rotating means 5E.

  Further, an inner peripheral cleaning tube 13 for cleaning the inner filter body 1 is inserted into the inner periphery of the inner filter body 1 so as to extend in the direction of the axis O, and the outer filter 2 is disposed on the outer periphery of the outer filter body 2. An outer peripheral cleaning pipe 14 for cleaning the body 2 is also provided so as to extend in the direction of the axis O. The inner peripheral cleaning tube 13 and the outer peripheral cleaning tube 14 are connected to each other at the lower end side in the direction of the axis O of the inner and outer filter bodies 1 and 2 and can rotate integrally around the axis O.

  In the present embodiment, one inner peripheral cleaning pipe 13 is inserted from the bottom surface of the casing 10 along the axis O, and the inner peripheral cleaning pipe 13 is rotated around the axis O by a bearing 13A at the insertion portion to the casing 10 bottom surface. Is supported in a fluid-tight manner. Further, outside the casing 10 below the bearing 13A, a pinion gear 13B is attached to the inner peripheral cleaning pipe 13, and a cleaning pipe rotating composed of a motor, a speed reducer and the like having a drive gear meshing with the pinion gear 13B. By means 13C, the inner peripheral cleaning tube 13 can reciprocate within a predetermined rotation range.

  Further, below the pinion gear 13B, a cleaning liquid supply pipe is connected to the lower end of the inner peripheral cleaning pipe 13 via a swivel joint (not shown), so that cleaning water or the like can be used regardless of the rotation of the inner peripheral cleaning pipe 13. The cleaning liquid can be supplied to the inner peripheral cleaning pipe 13. Further, the upper end of the inner peripheral cleaning tube 13 is rotatably supported around the axis O at the center of the lower surface of the lid 7D that covers the inner peripheral upper end of the inner filtration support flange 7A.

  The inner peripheral cleaning pipe 13 is provided with a nozzle 13D for diffusing and ejecting the cleaning liquid supplied from the cleaning liquid supply pipe as described above toward the filtration surface of the inner periphery of the inner filter body 1. In the present embodiment, the plurality of nozzles 13 </ b> D are ejected in one radial direction with respect to the axis O and another radial direction opposite to the axial line O at equal intervals in the direction of the axis O. Alternatingly arranged, the cleaning liquid can be supplied over the entire inner filtering surface of the inner filter body 1 by the rotation of the inner cleaning pipe 13. Of these, the inner peripheral cleaning pipe 13 is divided and liquid-tightly connected so that the cleaning liquid is not supplied above the upper end flange portion of the uppermost inner filtration structure 1A in the direction of the axis O. It may be configured.

  On the other hand, the outer peripheral cleaning pipe 14 is connected to the inner peripheral cleaning pipe 13 in the casing 10 on the lower end side in the direction of the axis O of the inner filter body 1 and the outer filter body 2, and rotates integrally with the inner peripheral cleaning pipe 13 as described above. After extending in the radial direction with respect to the axis O from the connecting portion with the inner peripheral cleaning tube 13, it is bent at a right angle on the outer peripheral side of the outer filter body 2 in the radial direction and extends upward in parallel with the axis O. It is L-shaped. The upper end of the outer peripheral cleaning tube 14 is located below the lower surface of the substrate 3 and is liquid-tightly sealed.

  Further, the outer peripheral cleaning pipe 14 communicates with the inner peripheral cleaning pipe 13 at a connection portion with the inner peripheral cleaning pipe 13, and the cleaning liquid supplied from the cleaning liquid supply pipe branches from the inner peripheral cleaning pipe 13 to the outer peripheral. Also supplied to the cleaning tube 14. A plurality of nozzles 14A for diffusing and ejecting the cleaning liquid toward the outer peripheral surface of the outer filter body 2 are also provided at equal intervals in the direction of the axis O (for example, a portion extending parallel to the axis O of the outer peripheral cleaning pipe 14). (The same number as the nozzle 13D of the inner peripheral cleaning tube 13).

  The outer peripheral cleaning pipe 14 is connected to the inner peripheral cleaning pipe 13 within a range in which the workpiece supply pipe 9 extends downward from the annular member 8 in the axis O direction. Here, in the present embodiment in which a plurality (two) of workpiece supply pipes 9 are connected at equal intervals in the circumferential direction as described above, the outer peripheral cleaning pipe 14 is also equally spaced in the circumferential direction as shown in FIG. Are connected to the inner peripheral cleaning pipe 13, and the outer peripheral cleaning pipe 14 has an inner circumference within a rotation range that does not interfere with the processed object supply pipe 9. By rotating integrally with the cleaning tube 13, the cleaning liquid can be supplied over the entire outer peripheral surface of the outer filter body 2.

  In such a vertical screw press type filtration device, for example, an object to be processed such as sludge is pumped through the object supply pipe 9 as described above and formed in the annular plate portion 11B at the lower end of the ribbon screw 11. It is supplied to the filtration space S from below through the hole 11C and conveyed upward as the ribbon screw 11 rotates, and the liquid (filtrate) is removed and filtered through the filter medium of the inner and outer filter bodies 1,2. . The removed filtrate travels along the inner periphery of the inner filter body 1 and the outer periphery of the outer filter body 2 and drops onto the bottom surface of the casing 10 and is discharged from the filtrate discharge hole 10A.

  Further, the filter cake that has been transported upward through the filtration space S and filtered the object to be treated is opened at its center from the discharge hole 3A onto the turntable 4D of the cake discharge chamber 4 while the moisture content is adjusted by the pressing ring 3C. As the turntable 4D is rotated by the filter cake that is discharged through the section and sequentially conveyed upward, the turntable 4D moves in the rotation direction T and is pushed to the outer peripheral side from the notch of the guide 4G. The portion is scraped off by the guide 4G and is guided and discharged to the cake discharge port 4B along the guide 4G. Even if the moisture content of the filter cake is adjusted by moving the pressing ring 3C up and down, the outer diameter (radius) is smaller than the radius from the axis O to the inner peripheral ends of the cake cutter 4F and the guide 4G. They will not interfere.

  In the vertical screw press type filtration device having the above-described configuration, the cake cutter 4F extending to the outer peripheral side is disposed around the opening on the turntable 4D so as to be integrally rotatable with the turntable 4D. The filter cake discharged from the upper end of the filtration space S through the opening of the turntable 4D is pushed out to the outer peripheral side while being divided in the circumferential direction by the cake cutter 4F. Accordingly, the filter cake thus divided and pushed to the outer peripheral side is sequentially discharged by the guide 4G fixed non-rotatingly with the rotation of the turntable 4D, so that the filter cake may accumulate. And no clogging of the filter cake due to deposition occurs.

  For this reason, the filtration operation is not interrupted to remove the clogged filter cake, and an excessive load is prevented from acting on the table rotation means 4E and the screw rotation means 5E, so that a continuous and stable filtration operation can be performed. It can be done and is efficient. Furthermore, since the filter cake divided in this way can be discharged from the cake discharge port 4B, even when the discharged filter cake is transported by the transport conveyor, it is compared with transporting a large filter cake that has become a lump due to accumulation. The load on the conveyor is small, and when the transported filter cake is supplied to drying and incineration facilities, the load on these facilities can be reduced. There is no need to crush.

  Further, in the vertical screw press type filtration device of the present embodiment, the cake cutter 4F has a plate shape standing on the turntable 4D, and the one of the above-mentioned ones located on the inner peripheral side of the turntable 4D. The portion extends toward the rear side in the rotation direction T of the turntable 4D as it goes toward the outer peripheral side. For this reason, the filtered cake that is pushed out and discharged from the opening of the turntable 4D to the outer peripheral side is further pushed out to the outer peripheral side by the one part along with the rotation of the turntable 4D and the cake cutter 4F. The filter cake is prevented from accumulating on the rotation direction T side of the cake cutter 4F, and can be smoothly discharged by the guide 4G.

  In addition, in the present embodiment, the other portion on the outer peripheral side of the cake cutter 4F extends in the tangential direction of the circle with the axis O as the center in the plan view, so that it extends from the opening of the turntable 4D to the outer peripheral side. The filter cake that has been pushed out and hits the other part is once pushed out to the rear side in the rotation direction T of the turntable 4D and then pushed out to the outer peripheral side again. For this reason, a gap can be formed between the one portion and the filter cake pushed out to the outer peripheral side, and a more reliable division of the filter cake can be promoted.

  In the present embodiment, the cake cutter 4F has a folded plate shape in which the flat plate is bent at an obtuse angle at the one portion and the other portion in the plan view, but the folded plate is bent in a plurality of steps. In addition, for example, in the same plan view, the turntable 4D may have a curved plate shape that protrudes toward the rotation direction T side as it protrudes toward the outer periphery side and the rotation direction T side. . Furthermore, the wedge shape which becomes gradually wide as it goes to the outer peripheral side of turntable 4D and the rotation direction T back side may be sufficient.

  Moreover, in this embodiment, since such a cake cutter 4F is arrange | positioned radially on the turntable 4D, it can divide | segment a filter cake further finely and prevent deposition and obstruction | occlusion more reliably. Can do. Further, since the plurality of cake cutters 4F are arranged at equal intervals in the circumferential direction of the turntable 4D, the size of the divided filter cake can be made uniform, and the above-described transport conveyor, drying, and incineration can be performed. The load on the equipment can be reduced more reliably.

  On the other hand, the guide 4G has a plate shape facing the rotation direction of the turntable 4D in the present embodiment, and the rotation direction T of the turntable 4D as it goes toward the outer peripheral side of the turntable 4D as opposed to the cake cutter 4F. It extends towards the side. Therefore, the cake filtered by the cake cutter 4F in the circumferential direction and pushed out to the outer peripheral side than the cake cutter 4F can be smoothly guided and discharged to the cake discharge port 4B by the rotation of the turntable 4D. It is possible to prevent the divided filter cake from adhering to a lump and further reliably reduce the load on the conveyor and the subsequent equipment.

  For example, the guide 4G may have a curved plate shape that is gently convex toward the rear side in the rotation direction T of the turntable 4D in the plan view, and may extend toward the rotation direction T toward the outer peripheral side. . In this embodiment, the turntable 4D is rotated around the axis O by the independent table rotating means 4E. However, for example, power is transmitted from the screw rotating means 5E that rotates the ribbon screw 11 to rotate the turntable 4D. In some cases, the ribbon screw 11 and the turntable 4D may be connected to rotate the turntable 4D at the same rotational speed as the ribbon screw 11.

  Furthermore, in the vertical screw press type filtration apparatus of the present embodiment, the inner filter body 1 and the outer filter body 2 for filtering the object to be processed are supported by being suspended from the upper end side of the axis O extending in the vertical direction. The structure such as the machine base is simplified as compared with the case where the inner and outer filter bodies are supported at the lower end as in the vertical screw press filtration device described in Patent Document 1, or It can be unnecessary. For example, in the present embodiment, the inner peripheral cleaning pipe 13 is inserted from the lower side of the casing 10 as described above. However, such a cleaning pipe as in the vertical screw press filtration device described in Patent Document 1 is used. If not provided, it is sufficient to secure a space for the processing object supply pipe 9 and a space for discharging the filtrate below the filtering space S, and the weight of the inner and outer filter bodies and the processing object acting on them. Since it is not necessary to support the weight on the machine base, the height to the upper end of the filtration space S from which the filter cake is discharged can be lowered, and the height of the filtration device itself can be kept low accordingly.

  For this reason, when assembling the inner and outer filter bodies 1 and 2 and when the ribbon screw 11 is accommodated in the filtration space S between them, it is possible to avoid assembly of the filtration device and maintenance thereof from being performed at high places. It is possible to improve workability. In addition, even when the filtered cake discharged from the cake discharge port 4B is transferred by a transfer conveyor or the like as described above, the transfer conveyor or the like can be lowered as the height of the upper end of the filtration space S can be reduced. In addition to reducing the installation cost, it is possible to cope with a case where the height of the building in which the filtration device is disposed is limited.

  In the present embodiment, the lower ends of the inner and outer filter bodies 1 and 2 supported by being suspended from the upper end side in the direction of the axis O are coaxially connected by the annular member 8 and are thus suspended. However, it is possible to adjust the position of the inner and outer filter bodies 1 and 2 so as to be coaxial with the axis O over the entire length in the direction of the axis O, and improve the assembly accuracy. It is no longer necessary to support the lower ends of the inner and outer filter bodies 1 and 2 in order to ensure that the height of the filtration space S and the entire apparatus can be more reliably suppressed. Furthermore, even when the workpiece is supplied from below the filtration space S as in this embodiment, the annular member 8 can seal the lower end of the filtration space S to prevent the workpiece from leaking. There is no need for a complicated sealing structure to prevent leakage.

  Furthermore, in this embodiment, the ribbon screw 11 accommodated in the filtration space S and transports the workpiece in the direction of the axis O is also suspended from the upper end side in the direction of the axis O, like the inner and outer filter bodies 1 and 2. And is supported rotatably. For this reason, it is not necessary to provide support means for supporting the ribbon screw 11 at the lower end as in the vertical screw press filtration device described in Patent Document 1 below the filtration space S.

  Further, since the ribbon screw 11 can be rotated around the axis O by the screw rotating means 5E via the screw support 12, it is not necessary to provide a rotating means for the ribbon screw 11 below the filtration space S. Therefore, the height of the filtration space S and the entire apparatus can be more reliably suppressed, and even when the lower ends of the inner and outer filter bodies 1 and 2 are connected by the annular member 8 as described above, It is possible to avoid interference between the support means and the rotation means of the ribbon screw 11.

  Further, in the present embodiment, a plurality of ribbon screws 11 are accommodated in the filtration space S so as to be integrally rotatable with an interval around the axis O, and rotational torques that act when conveying the object to be processed are these. It can be dispersed in a plurality of ribbon screws 11, and deformation or the like can be prevented without increasing the thickness of the ribbon screw 11. Moreover, since the lead of each ribbon screw 11 can be narrowed without changing the pitch in the direction of the axis O, the filling rate of the object to be processed into the filtration space S can be increased.

  Furthermore, by accommodating a plurality of ribbon screws 11 in the filtration space S in this way, the number of times the inner and outer peripheral edges of the ribbon screw 11 scrape the filtration surfaces of the inner and outer filter bodies 1 and 2 per rotation increases. The clogging can be prevented and the filtration rate can be increased. As a result, uniform filtration can be promoted to suppress variation in the moisture content of the filter cake, thereby improving the treatment capacity. Therefore, the filtration space S can be further reduced if the processing capacities are made equal. In particular, these effects are effective when a plurality of ribbon screws 11 are arranged at equal intervals in the circumferential direction as in this embodiment.

  Furthermore, in the present embodiment, the portions of the ribbon screw 11 facing the direction of the axis O are connected by the connecting member 11A, and the attachment strength of the ribbon screw 11 can be improved to prevent deformation and the like more reliably. it can. In particular, when the ribbon screw 11 is also suspended and supported as in the present embodiment, a tensile stress is applied to the connecting member 11A, so that the connection is narrower than when a compressive stress is applied. The member 11A can also ensure strength, and the connection member 11A can also prevent the conveyance of the object to be processed. In this embodiment, a plurality of ribbon screws 11 are connected by the connecting member 11A, but the same effect can be obtained even when a single ribbon screw is accommodated in the filtration space S.

  On the other hand, in the present embodiment, the inner filter body 1 of the inner and outer filter bodies 1 and 2 forming the filtration space S includes an inner cylindrical portion 6A whose outer peripheral surface forms a cylindrical surface with the axis O as the center. The ribbon screw 11 is fixed by being suspended from and supported by the upper end side in the direction of the axis O via the inner filtration support body 6, and the ribbon screw 11 has a cylindrical surface shape with the inner circumference centered on the axis O. And is suspended from the upper end side in the axis O direction so as to be rotatable around the axis O through a screw support 12 having an outer cylinder 12A slidably fitted on the outer periphery of the inner cylinder 6A. Lowered and supported.

  For this reason, even if the ribbon screw 11 is suspended, the inner filter support 6 and the inner and outer cylindrical portions 6A and 12A of the screw support 12 are fitted, so that the inner filter support 1 can be coaxial with the inner filter body 1 reliably and easily. Thus, the position of the ribbon screw 11 can be adjusted and supported around the axis O so as to be rotatable, and the assembly accuracy of the inner filter body 1 and the ribbon screw 11 can be improved. In particular, in the present embodiment, the entire inner filtration support 6 is such an inner cylindrical portion 6A, and the screw support 12 is also an outer cylindrical portion 12A that is externally fitted to the inner cylindrical portion 6A. Since the gear support ring 12C and the gear support plate 12D from the flange portion 12B of the screw support 12 also have the same inner diameter as the outer cylindrical portion 12A, higher coaxiality can be ensured.

  Further, the ribbon screw 11 is rotationally driven by the screw rotating means 5E via the gear support ring 12C, the gear support plate 12D, and the pinion gear 12E connected to the screw support 12. Therefore, as described above, when the outer cylindrical portion 12A of the screw support 12 is fitted to the inner cylindrical portion 6A of the inner filtration support 6, high strength against the rotational torque can be ensured in the ribbon screw 11. The ribbon screw 11 can be rotated while efficiently transmitting the driving force of the screw rotating means 5E and maintaining high coaxiality with the inner filter body 1. For this reason, it becomes possible to filter with the inner filter body 1 reliably conveying a to-be-processed object with the ribbon screw 11. FIG.

  Further, the inner periphery of the upper end portion of the ribbon screw 11 is supported by being joined to the lower end of the outer cylindrical portion 12A of the screw support 12 at a certain length as described above in the circumferential direction along the twist. A pinion gear 12E that is rotationally driven by the screw rotating means 5E is connected to the body 12 via the gear support ring 12C and the gear support plate 12D, and the rotational driving force is also joined in this way via the screw support 12. Therefore, an excessive twisting force hardly acts on the ribbon screw 11. In addition, since the gear support ring 12C, the gear support plate 12D, and the pinion gear 12E are connected to the upper end portion of the screw support 12, they are sufficient for the cake discharge chamber 4 formed around the screw support 12. Space can be secured and smooth discharge of the filter cake can be achieved.

  Furthermore, the outer peripheral surface of the inner filter body 1 supported by the inner filter support body 6 has a cylindrical surface shape centering on an axis O having the same outer diameter as the outer peripheral surface of the inner cylindrical portion 6A of the inner filter support body 6. There is no. Therefore, for example, when performing maintenance of the inner filter body 1, the inner filter support ring 7 </ b> B abutted against the flange portion of the lowermost inner filter structure 1 </ b> A and the annular plate portion 8 </ b> A of the annular member 8 are bolted. The inner filtration support body 6 together with the inner filtration support body 6 by unfastening and joining the flange portion of the inner filtration support flange 7A attached to the upper end of the inner filtration support body 6 and the lid body 5B of the gear chamber 5 by bolting or the like. The inner filter body 1 can be pulled out from the inner periphery of the ribbon screw 11 and the screw support body 12, and maintenance can be easily performed.

  Furthermore, in this embodiment, the inner filter body 1 is fixed by being suspended and supported by a suspension bolt 7C that is inserted into the inner periphery of the inner filter body 1 from the upper end side in the axis O direction. . Therefore, by appropriately setting the position of the upper end fastening portion of the suspension bolt 7C with the axis O, the inner filter body 1 can be reliably and easily arranged coaxially with the axis O, and the assembly accuracy is improved. be able to. Moreover, even when performing maintenance of the inner filter body 1 as described above, the inner filter body 1 can be lifted and pulled out via the suspension bolt 7C, so that the maintainability is further improved.

  Further, an inner filtration support body 6 having an outer diameter equal to that of the inner filtration body 1 disposed at the upper end of the inner filtration body 1 is also suspended and supported integrally with the inner filtration body 1 by the suspension bolts 7C. For this reason, this inner filtration support body 6 can also be arranged coaxially with respect to the axis O in the same manner as the inner filtration body 1, improving the assembly accuracy and simplifying the suspension structure of the inner filtration body 1. Even when the screw support 12 is externally fitted to the inner filtration support 6 as described above, the screw support 12 and the ribbon screw 11 can be accurately supported around the axis O.

  Furthermore, in this embodiment, the inner filter body 1 is constituted by a plurality of inner filter structures 1A divided in the direction of the axis O, and these inner filter structures 1A are integrally suspended by the suspension bolts 7C. Therefore, it is possible to configure the inner filter body 1 by accurately supporting the inner filtration structure 1A on the same axis. Further, the inner filter body 1 and the inner filter support body 6 constituted by the inner filter structure 1A are inserted into the respective flange portions from one inner filter support flange 7A at one place in the circumferential direction. The suspension bolt 7C is integrated by being screwed into the inner filtration support ring 7B. For example, a minute shift is sequentially stacked in the direction of the axis O as in the case of fastening with bolts and nuts for each flange portion. There will be no large deviation in the radial direction with respect to O.

  Moreover, the length of the individual inner filtration components 1A in the direction of the axis O can be shortened by configuring the inner filtration member 1 by the plurality of inner filtration components 1A divided in the direction of the axis O in this way. It is possible to easily manufacture the inner filtration structure 1A and the inner filtration body 1. Furthermore, even when a part of the inner filtration structure 1A is damaged, it is possible to replace only that part without replacing the entire inner filtration body 1.

  Furthermore, it is possible to combine the inner filtration components 1A having different functions, such as making the size of the pores and the opening ratio of the filter medium of at least some of the inner filtration components 1A different from others. On the supply pipe 9 side, the filtrate is quickly removed by the inner filtration structure 1A having a large opening size and opening ratio, while on the filter cake discharge hole 3A side, the opening size and opening ratio are reduced to perform filtration. You can also squeeze the cake. These effects can also be obtained by the outer filter body 2 constituted by a plurality of outer filter structures 2A divided in the direction of the axis O in the same manner as the inner filter body 1.

  On the other hand, in the present embodiment, an inner peripheral cleaning tube 13 for cleaning the inner filter body 1 is inserted into the inner periphery of the inner filter body 1 so as to extend in the direction of the axis O, and the outer periphery of the outer filter body 2 is Similarly, an outer peripheral cleaning pipe 14 for cleaning the outer filter body 2 is disposed so as to extend in the direction of the axis O, and the inner peripheral cleaning pipe 13 and the outer peripheral cleaning pipe 14 are connected to the axis O of the inner and outer filter bodies 1 and 2. It is connected at the lower end side in the direction and can rotate integrally around the axis O.

  For this reason, the filtration surfaces of the inner and outer filter bodies 1 and 2 suspended and fixed from the upper end side are washed evenly with a small amount of washing liquid by the rotating inner and outer peripheral washing tubes 13 and 14 to filter the inner and outer filter bodies 1 and 2. Surface clogging can be eliminated, and equipment such as a pump for supplying a cleaning liquid can be reduced. Furthermore, since the entire inner and outer filter bodies 1 and 2 can be cleaned by rotating the inner and outer peripheral cleaning pipes 13 and 14 by one cleaning pipe rotating means 13C, it is efficient.

  Further, the inner peripheral cleaning tube 13 and the outer peripheral cleaning tube 14 are communicated with each other on the lower end side in the axis O direction of the inner filter body 1 and the outer filter body 2, and the cleaning liquid supplied to the inner peripheral cleaning tube 13. Is branched and supplied also to the outer peripheral cleaning pipe 14 to clean the filtration surface of the outer filter body 2. For this reason, it is efficient because only one pump or the like for supplying the cleaning liquid is required, and the structure of the device such as a swivel joint can be simplified, and the maintenance is excellent.

  In addition, in this embodiment, although the to-be-processed object supply pipe | tube 9 is connected to the annular member 8, you may connect to the lower end part of the outer filter body 2, for example, and you may make it open to the filtration space S, In this case It is not necessary to form the through hole 11C in the annular plate portion 11B of the ribbon screw 11. In the present embodiment, the inner filter body 1 and the outer filter body 2 have a cylindrical shape with a constant outer diameter centered on the axis O, and the ribbon screw 11 has a constant inner and outer diameter along with this, For example, the cross-sectional area of the portion surrounded by the filtration surface of the inner and outer filter bodies 1 and 2 and the ribbon screw 11 in the cross section orthogonal to the axis O is reduced from the supply side of the workpiece to the discharge side of the filter cake, At least one of the inner and outer filter bodies 1 and 2 may be formed in a conical shape or a multistage cylindrical shape with the axis O as the center, and the inner and outer diameters of the ribbon screw 11 may be changed accordingly. Furthermore, the lead of the ribbon screw 11 may be changed toward the axis O direction.

DESCRIPTION OF SYMBOLS 1 Inner filter body 1A Inner filter structure 2 Outer filter body 2A Outer filter structure body 3 Substrate 3A Discharge hole 4 Cake discharge chamber 4B Cake discharge port 4D Turntable 4E Table rotation means 4F Cake cutter 4G Guide 5 Gear chamber 5E Screw rotation means 6 inner filtration support 6A inner cylindrical part 7C suspension bolt 8 annular member 9 workpiece supply pipe 10 casing 11 ribbon screw 11A connecting member 12 screw support 12A outer cylindrical part 13 inner peripheral cleaning pipe 13C cleaning pipe rotating means 14 outer peripheral cleaning Tube O Axis of filter body 1 T Rotation direction of turntable 4D S Filtration space

Claims (5)

An inner filter body fixed in a cylindrical or conical shape with an axis extending in the longitudinal direction as a center, and a cylindrical or conical shape coaxial with the inner filter body and spaced outside the inner filter body. An outer filter body that is fixed in a fixed manner, and a ribbon screw that is spirally twisted about the axis and is accommodated in a filtration space between the inner filter body and the outer filter body and rotated about the axis. A vertical screw press type filtration device for filtering the object to be processed supplied to the lower part in the filtration space by the inner filter body and the outer filter body while being conveyed upward by the ribbon screw,
On the outer periphery of the upper end portion of the outer filter body, a turntable having an opening at the upper end portion of the outer filter body is provided to be rotatable around the axis,
On the turntable, the filtered cake of the object to be processed discharged from the upper end of the filtration space is sequentially discharged over the entire circumference of the opening,
On the turntable, a cake cutter that forms a plate erected on the turntable and divides the filter cake in the circumferential direction of the turntable is formed in the opening portion so as to be rotatable integrally with the turntable. While being arranged to extend toward the outer periphery,
On the outer peripheral side of the cake cutter, a guide for guiding the divided filter cake to the cake discharge port is fixed to the rotating turntable and the cake cutter in a non-rotating manner with a gap therebetween. A vertical screw press filtration device. The cake cutter, vertical screw press type filtering apparatus according to claim 1, characterized in that extends toward the rear side in the rotation direction of the turntable toward the outer peripheral side of the turntable.   The vertical screw press filtration apparatus according to claim 1 or 2, wherein a plurality of the cake cutters are radially arranged on the turntable.   The vertical screw press filtration device according to claim 3, wherein the plurality of cake cutters are arranged at equal intervals in a circumferential direction of the turntable.   2. The guide according to claim 1, wherein the guide has a plate-like shape facing the rotation direction of the turntable, and extends toward the rotation direction side of the turntable toward the outer peripheral side of the turntable. The vertical screw press type filtration apparatus according to claim 4.

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