JP2015157256A - Solid-liquid separator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-liquid separator which can suppress a strain occurring in a filter piece during resin molding, facilitate the assembly of each filer piece, and be constituted of a small number of parts.SOLUTION: In a solid-liquid separator 10TI that carries out separation filter into solid contents and liquid contents contained in suspension sewage, interval holding tools for holding filter pieces in filtration grooves with predetermined gaps are resin-molded integrally with the front and rear faces of the filter pieces as projections, or the filter pieces are anchored in a stack form while being interposed between the filter pieces as separate spacers. Separation filtration into solid content recovery discharge of s suspension microparticles contained in suspension sewage and little liquid discharge of a small amount of suspension microparticles are effectively carried out by means of a filter stack 1 formed with a filtrate outflow groove of each slit formed by loosely fitting a filter plate into each of the filter pieces so as to be able to oscillate.

Description

  The present invention includes, for example, sludge solids contained in liquids, particularly suspensions generated in wastewater treatment facilities including sludge such as sewage treatment plants, human waste treatment plants, livestock agriculture, food manufacturing industries, and chemical industries. The present invention relates to an apparatus for separately taking out a solid content and a liquid content from which a turbid solid (SS) is separated.

  Currently, wastewater containing sludge generated in wastewater treatment plants such as sewage treatment plants, human waste treatment plants, livestock farming, food manufacturing industries, and chemical industries, ie suspended sewage, can be drained as it is due to environmental damage. What cannot be done is a well-known thing, and it has become a subject to process in the state which removed the suspended solid (SS) contained in suspended sewage as much as possible.

  For this purpose, a set of large and small filter pieces with different diameters for holding gaps is used as a set, and a plurality of stacked filter bodies in which the plurality of sets are inserted and fixed to the rotation shaft are arranged at equal intervals in the discharge direction. The laminated filter body is rotated in the same direction so that the outer peripheral edge of the feed filter piece in one of the adjacent laminated filter bodies approaches the outer peripheral edge of the gap filter piece in the other laminated filter body. The feed filter piece of the body is combined so as to face the front and rear adjacent gap filter pieces, and by rotating each laminated filter body, the feed filter piece rotates in a form that bites into the narrow gap of the gap filter piece, An apparatus for filtering a suspension that prevents clogging of the filtration surface is known (for example, see Patent Document 1).

  In addition, as another background art, a plurality of fixing rings with spacers attached using bolts and nuts are stacked to form a liquid guide groove, an idle ring is arranged on the inner periphery, and the screw conveyor is driven to idle ring. An apparatus that separates sludge water into solid content and moisture by rotating the shaft eccentrically is also known (see, for example, Patent Document 2).

JP-A-2-31807 JP-A-5-228695

  However, in the apparatus for filtering the suspension of Patent Document 1, the narrow gaps of the small-diameter disk-shaped filter pieces must be slightly larger than the thickness of the large-diameter disk-shaped filter pieces that rotate in a biting manner. Since the large-diameter disc-shaped filter piece is completely fixed to the rotating shaft and rotates on the same track, the cake of the filtered dehydrated product that has to be scraped off naturally increases the thickness of the large-diameter disc-shaped filter piece through a narrow gap. The area to be removed is solidified and the filtration surface becomes clogged, making it impossible to separate the suspension from solid and liquid. Large and small-diameter disk-shaped filter pieces are extremely thin, about 0.2 mm to 1 mm. Therefore, since processing strain and thermal strain occur during the press processing and laser processing, it is necessary to remove the strain, and when the diameter of the disk-shaped filter piece is increased, the effect of strain becomes significant and the adjacent small diameter Of large-diameter disk-shaped filter pieces that form fine gaps in disk-shaped filter pieces In addition to increasing the rotating shaft torque of the laminated filter body due to contact interference on the side surfaces, wear of large and small disk-shaped filter pieces is accelerated, and large-diameter and small-diameter disk-shaped filter pieces are laminated. Since the filtration groove is formed by fixing, the accuracy of the width and position of the filtration groove is greatly affected by the thickness and flatness accuracy of both filter pieces and the reduction of tightening during stacking assembly. Since careful attention and adjustment are sometimes required, assembly has the drawback of requiring a lot of labor and skill.

  Further, in the solid-liquid separation device described in Patent Document 2, since the screw conveyor is configured to separate the sludge water so as to push the sludge water from the inlet to the outlet, the spacer on the inlet side of the sludge water is likely to wear, There was a drawback that parts had to be replaced each time.

  In view of the above problems, an object of the present invention is to provide a solid-liquid separation device that can suppress distortion generated in a filter piece during resin molding and facilitate the assembly of each filter piece.

  In the invention according to claim 1 of the present invention, in a solid-liquid separation device that separates and filters solid liquid and liquid contained in suspended sewage having a raw liquid supply port, a solid content discharge port, and a filtrate drain port, An interval holder for holding the filter in the filtration groove of a required interval is integrally molded as a convex on the front and back surfaces of the filter piece, or each filter is inserted as a separate spacer between the filter pieces. Each piece formed by laminating pieces in a laminar manner and loosely fitting a filtration plate into each filtration groove is included in the suspended sewage by a laminated filter body formed as a drainage drainage groove. The main feature is that it is configured so as to efficiently separate and filter the suspended particulate solids collected and discharged into the liquid wastewater with less suspended particulates.

  In the solid-liquid separator according to claim 1 of the present invention, the invention according to claim 2 of the present invention is characterized in that a filter piece formed by integrally resin-molding three or more protrusions on the front and back surfaces of the filter piece is projected. As the sub filter piece, the convex height of the convex end face of the convex filter piece is configured such that one surface is higher than the other surface, or both the front and back surfaces are configured to have the same height.

  In the solid-liquid separation device according to claim 2 of the present invention, the invention according to claim 3 of the present invention is such that both the front and back surfaces or one surface of the convex filter piece are provided so as to project annularly. A depression is formed at the center of the end face of the convex.

  In the solid-liquid separation device according to any one of claims 1 to 3, the invention according to claim 4 of the present invention is a projecting element integrally formed with the filter piece or a rotating shaft between the filter pieces. A small-diameter filtration plate that is swingably fitted and accommodated between the filter pieces by a separate spacer fitted to the filter, and an outer edge of the filtration groove of the other laminated filter body disposed opposite to the outer edge of the small-diameter filtration plate Two types of filtration plates, a large-diameter filtration plate that is loosely accommodated in the filtration groove so as to be able to swing further, and each of the filter pieces interposing the convex filter pieces or spacers are adjacent to each other. A plurality of laminated filter bodies, which are stacked in a stacking order in which the outer edges of the opposing filter plates do not interfere with each other due to the stacking order configuration of the filter bodies, receive suspended sewage and separate the solids and liquids while filtering them. It is installed at the center of each laminated filter so that it can be transferred to the discharge port. While rotatably driven by the rotary shaft, the respective lamination 濾体 flanked opposite sequence is divided into two upper and lower stages, and is configured to efficiently separated filtration.

  In the solid-liquid separation device according to claim 4 of the present invention, the invention according to claim 5 of the present invention is that in the laminated filter body, the convex filter pieces and the large-diameter filtration plate include the filtrate holes and the small-diameter filtration plate. The filtrate notch holes are concentrically drilled, and the filtrate hole and the filtrate notch hole form a filtrate path in both the laminated filter bodies after the lamination, and the liquid-feed end opening of the filtrate path is the solid-liquid separation Conduction is made in a filtrate chamber attached to the outside of the apparatus side wall, and a filtrate chamber drainage port is opened on the lower wall of the filtrate chamber.

  In the solid-liquid separator according to any one of claims 1 and 2, the invention according to claim 6 of the present invention is characterized in that the starting end opening of the laminated filter body is a stock solution supply port of suspended sewage. A screw conveyor having a terminal opening as a solid outlet and an outer diameter of the screw blade larger than an inner diameter of the filter plate and smaller than an inner diameter of the filter piece is fitted into the center hole of the laminated filter body. It is configured to wear.

  According to the solid-liquid separation device of the first aspect of the present invention, in the solid-liquid separation device, the interval holders for holding the gaps between the filter pieces in the filtration grooves having the required intervals are provided on the front and back surfaces of the filter pieces. By integrally molding the resin as a convex element, it is possible to configure a filter piece that can be accurately stacked just by adjusting the mold of the filter piece. In addition, the filter piece can be configured with a spacing holder as a separate spacer. By providing them on the front and back surfaces, even if distortion due to resin molding occurs in the filter pieces, fine adjustment can be performed with the spacers, so that the filter pieces can be configured to be stacked with high accuracy.

  Further, according to the solid-liquid separation device according to the second aspect of the present invention based on the first aspect of the present invention, the filter pieces formed by integrally resin-molding the protrusions on the front and back surfaces of the filter pieces are convex. Since it is configured as a sub filter piece, it is possible to stably stack a large number of filter pieces, and by forming a convex, it is possible to reduce the contact area with the other convex filter piece The distortion generated by the contraction of each part of the convex filter piece due to the difference in the cooling time during resin molding can be absorbed and managed by the convex part, so by forming the convex part, the entire filter piece It is possible to suppress distortion, and if the convex height of the convex end face of the convex filter piece is the same on both the front and back surfaces, the height of the convex can be made uniform and the resin can be made uniform. The cooling time at the time of molding is the same on both the front and back sides of the convex, and the filter piece shrinks during cooling The convex on the front side tends to bend due to the stress caused by the stress, but the convex on the back side also tends to bend. It is possible to further suppress and at the time of assembly, it is possible to insert into the rotating shaft regardless of the direction of the front and back surfaces of the convex filter piece, for example, by driving the solid-liquid separation device Even if the protrusion on the front surface side of the piece is worn, it has an effect that it is possible to turn the protrusion filter piece over and use the protrusion on the back surface.

  Furthermore, according to the solid-liquid separation device according to the third aspect of the present invention based on the second aspect of the present invention, both the front and back surfaces or one of the convex surfaces is provided so as to project the convex end surface of the convex filter piece in an annular shape. Since the depression is formed in the center of the end face, the contact area of the protrusion is reduced, and the inside and outside of the depression are cooled evenly during resin molding. The entire cooling time is made uniform, and it is possible to more effectively prevent the occurrence of distortion caused by the difference in cooling time of each part of the convex filter piece.

  Further, according to the solid-liquid separation device according to the invention of claim 4 based on any one of claims 1 to 3 of the present invention, a convex element integrally formed with the filter piece or a rotating shaft between the filter pieces. A small-diameter filtration plate that is swingably fitted and accommodated between the filter pieces by a separate spacer fitted to the filter, and an outer edge of the filtration groove of the other laminated filter body disposed opposite to the outer edge of the small-diameter filtration plate Two types of filtration plates, a large-diameter filtration plate that is loosely accommodated in the filtration groove so as to be able to swing further, and each of the filter pieces interposing the convex filter pieces or spacers are adjacent to each other. A plurality of laminated filter bodies, which are stacked in a stacking order in which the outer edges of the opposing filter plates do not interfere with each other due to the stacking order configuration of the filter bodies, receive suspended sewage and separate the solids and liquids while filtering them. Provided at the center of each laminated filter body to be transferred to the discharge port Since it is configured to efficiently separate and filter by the laminated filter bodies that are adjacently arranged in two separate stages while being driven and rotated by the rotating shaft, the solid-liquid separation device for the convex filter pieces is driven. Even if it is necessary to replace the convex filter piece, if the height of the convex element formed on the convex filter piece is the same on both the front and back surfaces, the convex part will be The subfilter piece can be easily replaced, and the workability can be improved.

  According to the solid-liquid separator according to the invention of claim 5 based on claim 4 of the present invention, the convex filter pieces and the large-diameter filtration plate have concentric filtrate holes, and the small-diameter filter plate has concentric filtrate notches. The filtrate hole and the filtrate notch hole form a filtrate path in the two laminated filter bodies after lamination, and a liquid feed terminal opening of the filtrate path is provided outside the side wall of the solid-liquid separator. Since it is connected to the filtrate chamber and is configured to open a filtrate chamber drain on the lower wall of the filtrate chamber, the filtrate chamber on the lower wall of the filtrate chamber via the filtrate path is more than in the case of a laminated filter body without a filtrate path. Since drainage from the drainage port is added, the filtrate separation capacity of the large and small diameter filtration plates that swing and rotate in the filtration groove is improved. Has the effect that can be recovered.

  According to the solid-liquid separator according to the invention of claim 6 based on any one of claims 1 and 2, the starting end opening of the laminated filter body is used as a stock solution supply port for suspended sewage, and the end opening is formed. As the solid content outlet, a screw conveyor formed so that the outer diameter of the screw blade is larger than the inner diameter of the filter plate and smaller than the inner diameter of the convex filter piece is fitted into the center hole of the laminated filter body. Therefore, suspended sewage is pushed out from the opening at the start end to the end opening, and the protrusion on the start end opening side is very easily worn, but the height of the protrusion formed on the protrusion filter piece is convex. If the front and back surfaces of the sub filter piece are configured identically, the convex filter piece can be mounted upside down and used.

It is a longitudinal cross-sectional view of the multiple disk type solid-liquid separator in Example 1 of this invention. It is sectional drawing of the XX arrow direction of FIG. (A) is a front view of the laminated filter body of Example 1 of this invention, (b) is the vertical side view. It is the principal part expanded side view which showed the adjacent aspect of the some laminated filter body of Example 1 of this invention. (A) is a front view of the large diameter filtration plate which comprises the laminated filter body of Example 1 of this invention, (b) is the vertical side view. BRIEF DESCRIPTION OF THE DRAWINGS (a) of the small diameter filtration plate which comprises the laminated filter body of Example 1 of this invention is a front view, (b) is the vertical side view. (A) is a front view of the convex filter piece constituting the laminated filter body of Example 1 of the present invention, (b) is a vertical side view of (a), and the convex height of the convex is the same on the front and back surfaces. (C) is a longitudinal side view of (a) in which the convex height of the convex is configured such that one surface is higher than the other surface. It is the principal part enlarged side view which showed the adjacent aspect of the some laminated filter body in another embodiment of Example 1 of this invention. It is a longitudinal cross-sectional view of the solid-liquid separator in Example 2 based on Example 1 of this invention. It is sectional drawing of the XX arrow direction of FIG. (A) of the laminated filter body of Example 2 of this invention is a front view, (b) is the AA sectional drawing. It is the principal part enlarged side view which showed the adjacent aspect of the some laminated filter body of Example 2 of this invention. (A) of the large diameter filtration plate which comprises the laminated filter body of Example 2 of this invention is a front view, (b) is the vertical side view. (A) of the small diameter filtration plate which comprises the laminated filter body of Example 2 of this invention is a front view, (b) is the vertical side view. (A) of the convex filter piece which comprises the laminated filter body of Example 2 of this invention is a front view, (b) is AA sectional drawing of (a), and represents the convex installation height of the convex 5t. It is the same on the back surface, and (c) is a cross-sectional view taken along the line AA of (a), in which the height of the protrusion 5T is configured so that one surface is higher than the other surface. It is a vertical side view of the screw-type solid-liquid separator in Example 3 of this invention. It is an expanded sectional view of the XX arrow direction of FIG. It is a principal part vertical side view which illustrated the state which a filtration plate rotates eccentrically by rotation of the screw conveyor of Example 3 of this invention. It is a principal part longitudinal side view which illustrated the state which the filtration plate rotates eccentrically by rotation of the screw conveyor in another embodiment of Example 3 of this invention.

  Hereinafter, in the solid-liquid separation device for separating and filtering the solid content and the liquid content contained in the suspended sewage of the present invention, an interval holder for holding the interval between the filter pieces in a filtration groove of a required interval is shown on the filter piece. The resin plate is integrally molded as a convex on the back surface, or each filter piece is fixed in a laminated manner while being interposed between the filter pieces as a separate spacer, and the filter plate is swingable in each filter groove With the laminated filter formed as a drainage groove, each slit formed by loosely fitting is used to collect and discharge suspended solids contained in the suspended sewage and to drain the liquid with less suspended particulates. Embodiments configured to efficiently separate and filter will be described in detail with reference to the drawings based on examples of the present invention as follows. However, the present invention is not limited to the embodiments. Absent.

  The multi-disc type solid-liquid separator 10T according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7. A stock solution supply port 11 for supplying a stock solution of suspended sewage to the upper part of the solid-liquid separator 10T is provided. At the bottom, a filtrate outlet 13 for draining the solid-liquid separated filtrate out of the solid-liquid separator 10T is opened at the bottom, and the solid content separated by solid-liquid separation is provided on the side surface of the solid-liquid separator 10T. A solid content outlet 12 for discharging and collecting the cake of the filtered dehydrated product outside the solid-liquid separator 10T is provided, and the gap between the stock solution supply port 11 and the solid content outlet 12 is as shown in FIG. A plurality of laminated filter bodies 1 arranged in two upper and lower stages at equal intervals rising in the upward direction toward the discharge direction of the solid content discharge port 12 are arranged, as shown in FIGS. 3 and 5 to 7. In three or more places on the front and back surfaces of the plurality of convex filter pieces 5 constituting the laminated filter body 1, It is possible to integrally mold the protrusions 5t provided with the ridges R, and the protrusions 5t can be provided so that the protrusions on one surface side are higher than the protrusions on the other surface side. Are protruded at the same height, and the large-diameter filtration plate 2 and the small-diameter filtration plate 3 can be moved in the axial direction alternately in the respective filtration grooves S while the end faces of the protrusions 5t are brought into contact with each other to form the filtration grooves S. D is obtained by interposing the convex filter piece 5 and the slit of the large-diameter filtration plate 2 or the small-diameter filtration plate 3 as a drainage drainage groove G, specifically, by cutting a circular portion into a flat shape. As shown in FIG. 2, the bearing 9 provided on the outside of the front side wall 10f and the rear side wall 10r of the solid-liquid separator 10T has a locking function such as a cut or key (not shown). And a drive transmission tool 8 (for example, provided outside the front side wall 10f) A convex filter piece 5 having a different diameter and having a shaft hole formed in the center so as to be fitted into the locking shape of the rotary shaft 4 so as to rotate synchronously with the rotary shaft 4 that is rotationally driven by a form gear, etc. For example, (a) First, the convex filter piece 5 is inserted into the outer periphery of the rotary shaft 4, and (b) the convex element 5t of the convex filter piece 5 inserted first is large. The large-diameter filtration plate 2 is inserted into the rotary shaft 4 so as to fit in the convex free-insertion holes 2h of the radial filter plate 2, and (c) next, the convex filter piece 5 is inserted into the rotary shaft 4 and the convex filter is inserted. The large-diameter filtration plate 2 inserted first is formed by abutting the end surface of the protrusion 5t on the back side of the piece 5 and the end surface of the protrusion 5t on the surface side of the protrusion piece 5 to form a filtration groove S. (D) Next, the small-diameter filtration plate 3 is inserted into the rotary shaft 4 so that the convex notch hole 3h of the small-diameter filtration plate 3 fits into the convex 5t. Then, (e) the next convex filter piece 5 is inserted into the rotary shaft 4, the end face of the convex 5t and the end face of the previous convex 5t are brought into contact with each other to form a filtration groove S, and the small diameter filtration plate 3, and a plurality of laminated filter bodies 1 formed by repeating the procedures (a) to (e) described above are used as one laminated filter body 1 of adjacent laminated filter bodies 1 as shown in FIG. In which the outer peripheral edge of the large-diameter filtration plate 2 is inserted into the filtration groove S of the other laminated filter body 1 so as to be close to the convex elements 5t of the other convex filter piece 5 and the outer peripheral edge of the small-diameter filtration plate 3; The outer edge of the main part of the seal member 7 attached to the supply side wall 10s and the discharge side wall 10d of the solid-liquid separator 10T so as to efficiently recover the collected fine particles contained in the processing liquid is connected to the solid content outlet 12 side. A slight gap at the outer periphery of the convex filter piece 5 of the laminated filter body 1 at the upper and lower ends of the end and the lower end of the starting end on the stock solution supply port 11 side A large-diameter filtration plate which is opposed to each other at a distance and desirably can be further improved by attaching a brush having a low sliding resistance to the outer edge portion of the seal member 7 while suppressing an increase in torque of the rotating shaft 4. 2 and the small-diameter filtration plate 3 are configured to be able to rotate in synchronization with the rotary shaft 4 while swinging in the filtration groove S in the axial direction.

  Further, as shown in FIG. 8, the convex element 5t is not integrally molded with the convex filter piece 5, but, for example, a separate spacer 6s is inserted into the rotating shaft next to the filter piece 6, and the spacer 6s The large-diameter filtration plate 2 or the small-diameter filtration plate 3 can be inserted and configured so as to be located in the outer peripheral portion, and a plurality of spacers are attached to the flat surface of the filter piece 6 so that each filter piece is required. It is also possible to configure as an interval holder for holding in the interval filtration grooves.

  For example, referring to FIGS. 9 to 15 based on the first embodiment, in the laminated filter body 1, as shown in FIGS. The hole 15 and the small-diameter filtration plate 3 are concentrically formed with a filtrate notch 16, respectively. As shown in FIGS. 9 to 11, the filtrate hole 15 and the filtrate notch 16 are formed in the laminated filter body 1 after lamination. The filtrate passage 14 is formed, and the liquid feed terminal opening of the filtrate passage 6 is electrically connected to the filtrate chamber 17 provided outside the back side wall 10r of the solid-liquid separator 10T, and the lower wall of the filtrate chamber 17 The filtrate chamber drain port 18 is opened.

  A screw-type solid-liquid separator 10S according to the third embodiment of the present invention will be described with reference to FIGS. 16 to 18. A screw conveyor 22 that is rotated by being driven by a prime mover 23 has a central hole 21 of the laminated filter body 1. As the screw conveyor 22 rotates, the screw blade 22B having an outer diameter smaller than the inner diameter of the convex filter pieces 5 ·· 5 and larger than the inner diameter of the filter plates 19 ·· 19 rotates. Thus, the protrusions that are formed by resin molding integrally at the same height, preferably at three or more locations on the front and back surfaces of the seat portions 20... 20 formed outside the convex filter pieces 5. The outer edge of the screw blade 22B is in sliding contact with the inner peripheral portion of the filter plate 19,... 19 that is loosely fitted between the stacks of the convex filter pieces 5,. And supply the stock solution The stock solution of the suspended sewage sent from 11 into the cylindrical laminated filter body 1 advances in the axial direction while swirling along the screw blade 22B, and is filtered between the laminated layers of the convex filter pieces 5. The filtered water flows out from the filtered water outflow groove G formed by the plates 19... 19, and the solid content that has been dehydrated and has a low water content ratio is discharged by pushing the discharge pressure regulating valve 24 ahead. The outlet 12 is sequentially discharged.

  In addition, as shown in FIG. 19, the convex 5t is not integrally molded with the convex filter piece 5. Instead, for example, separate spacers 6s are provided on the seats 20. By fixing the spacer 6s by, for example, it is also possible to configure as an interval holder for holding between the filter pieces in a filtration groove having a required interval.

DESCRIPTION OF SYMBOLS 1 Laminated filter body 2 Small diameter filtration plate 3 Large diameter filtration plate 5 Convex filter piece 5t Convex piece 6 Filter piece 6s Spacer 10T Solid-liquid separator (Multiple disk type)
10S solid-liquid separator (screw type)
11 Stock solution supply port 12 Solid content discharge port 13 Filtrate drain port 14 Filtrate passage 15 Filtrate hole 16 Filtrate notch hole 17 Filtrate chamber 18 Filtrate chamber drain port 19 Filtration plate 21 Center hole 22 Screw conveyor 22B Screw blade G Filtrate outflow groove R S Filtration groove

Claims (6)

  In a solid-liquid separation device that has a stock solution supply port, a solid content discharge port, and a filtrate drainage port, and separates and filters the solid content and liquid content contained in suspended sewage, each filter piece is held in a filtration groove at a required interval. The interval holding tool for the resin is integrally molded as a convex on the front and back surfaces of the filter pieces, or the filter pieces are fixed in a stacked manner while being interposed between the filter pieces as separate spacers, The solid filter collects and discharges the suspended fine particles contained in the suspended sewage by the laminated filter formed with each slit formed as a drainage outflow groove. A solid-liquid separator characterized in that it is efficiently separated and filtered into a liquid wastewater having a small amount of suspended fine particles.   The solid-liquid separation apparatus according to claim 1, wherein a filter piece obtained by integrally resin-molding protrusions at three or more locations on the front and back surfaces of the filter piece is used as a convex filter piece, and the convex end face of the convex filter piece. The solid-liquid separation device is characterized in that the height of the protrusion is configured such that one surface is higher than the other surface, or both the front and back surfaces are configured to have the same height.   3. The solid-liquid separation device according to claim 2, wherein a depression is formed in a center portion of the front and rear surfaces or one end of the convex end surface so as to project the convex end surface of the convex filter piece in an annular shape. A solid-liquid separator characterized by.   The solid-liquid separation device according to any one of claims 1 to 3, wherein each filter piece is separated by a protrusion integrally formed with the filter piece or a separate spacer fitted on a rotation shaft between the filter pieces. A small-diameter filtration plate that is swingably fitted in and swingably fit in the filtration groove so as to protrude from the outer edge of the filtration groove of the other laminated filter body disposed opposite to the outer edge of the small-diameter filtration plate. Two types of filtration plates of the large-diameter filtration plate, and the filter pieces with the convex filter pieces or spacers interposed therebetween, are arranged on the other filtration plates facing each other by the stacking order configuration of the other opposite laminated filter bodies. The center of each layered filter body is stacked in a stacking order so that the outer edges do not interfere with each other so that a plurality of layered filter bodies receive suspended sewage and transfer it to the solids outlet while separating and filtering into solids and liquids. While rotating by the rotating shaft provided in The respective lamination 濾体 flanked opposite sequence is divided into stages, efficiently separate solid-liquid separator, characterized by being configured to filter.   5. The solid-liquid separator according to claim 4, wherein, in the laminated filter body, a convex hole and a large-diameter filtration plate are concentrically drilled with a filtrate hole and a small-diameter filtration plate with a concentric hole. The filtrate hole and the filtrate notch hole form a filtrate path in both the laminated filter bodies after lamination, and the liquid feed end opening of the filtrate path is connected to the filtrate chamber attached outside the side wall of the solid-liquid separator. A solid-liquid separator characterized in that a filtrate chamber drain port is opened in the lower wall of the filtrate chamber.   3. The solid-liquid separation device according to claim 1, wherein a filter groove is formed by providing a protrusion or a spacer on the front or back surface or one surface of the filter piece, and a starting end opening of the laminated filter body. A screw conveyor formed with an outer diameter of the screw blade larger than the inner diameter of the filtration plate or smaller than the inner diameter of the filter piece, with the stock solution supply port of suspended sewage and the terminal opening as the solid content discharge port. A solid-liquid separation device configured to be fitted into a center hole of the laminated filter body.

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