JP2017225975A - Solid-liquid separating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid-liquid separating device which can suppress strain occurring in a filter piece during resin molding, facilitate assembly of each filer piece, and be constituted of a small number of parts.SOLUTION: In a solid-liquid separating device 10T that carries out separation filter into solid content and liquid content contained in suspension polluted water, interval holding tools for holding a gap between respective filter pieces in filtration grooves with predetermined gaps are resin-molded integrally with 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 independent separate spacers. Separation filtration into solid content recovery discharge of suspension microparticles contained in the suspension polluted water and little liquid discharge of a small amount of suspension microparticles are effectively carried out by a filter stack 1 formed as a filtrate outflow groove of each slit formed by loosely fitting a filter plate into each of the filtration grooves so as to be able to oscillate.SELECTED DRAWING: Figure 1

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.

  A solid-liquid separation device according to claim 1 of the present invention includes a stock solution supply port and a solid content discharge port, and a plurality of laminated filter bodies that are inserted into the outer periphery of the rotating shaft and have a filtration groove through which filtrate passes. The plurality of laminated filter bodies are arranged in two upper and lower rows between the stock solution supply port and the solid content discharge port, and the laminated filter body integrally has a protrusion protruding in the axial direction of the rotating shaft. A plurality of convex filter pieces, and a filtration plate that is disposed between the convex filter pieces so as to be movable in the axial direction and is fitted into the convex elements.

  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 the filtration plate includes a plurality of large-diameter filtration plates having a larger diameter than the convex filter pieces, and the convex A plurality of small diameter filtration plates having a smaller diameter than the filter piece.

  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 the laminated filter body has a large-diameter filtration plate and a small-diameter filtration plate in a gap between adjacent convex filter pieces. Are alternately arranged one by one.

  In the solid-liquid separation device according to claim 2 or 3 of the present invention, the invention according to claim 4 of the present invention is such that a plurality of laminated filter bodies arranged in two upper and lower rows are each laminated in each row. Filter bodies are arranged adjacent to each other, and the outer peripheral edge of the large-diameter filtration plate of one laminated filter body arranged adjacent to each other is opposed to the outer peripheral edge of the small-diameter filtration plate in the filtration groove of the other laminated filter body Are arranged to be.

  In the solid-liquid separator according to any one of claims 1 to 4 of the present invention, the invention according to claim 5 of the present invention is such that the convex is provided on one surface in the axial direction of the convex filter piece. It has a 1st convex and the 2nd convex which is provided in the other surface of the axial direction of a convex filter piece, and whose protrusion height becomes higher in the axial direction than a 1st convex.

  In the solid-liquid separator according to any one of claims 1 to 5 of the present invention, the invention according to claim 6 of the present invention is characterized in that the convexes are spaced apart in the circumferential direction on the surface of the convex filter piece. A plurality are provided apart.

  In the solid-liquid separation device according to any one of claims 1 to 6 of the present invention, in the invention according to claim 7 of the present invention, a depression is provided at the top of the protrusion.

  In the solid-liquid separation device according to any one of claims 1 to 7, the invention according to claim 8 of the present invention is such that the convex filter piece is integrally formed with a resin material. ing.

  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 resin-molding as a protrusion, it is possible to configure a filter piece that can be accurately laminated only by adjusting the mold of the filter piece.

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 a principal part expanded side view which showed the adjacent aspect of the some laminated filter body in the reference example 1. FIG. 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 Reference Example 2. 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 where the filtration plate rotated eccentrically by rotation of the screw conveyor of the reference example 2. It is a principal part vertical side view which illustrated the state where the filtration plate rotated eccentrically by rotation of the screw conveyor of the reference example 2.

  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.

Reference example 1

  Further, in Reference Example 1, as shown in FIG. 8, the convex element 5 t is not integrally molded with the convex filter piece 5, but, for example, a separate spacer 6 s is inserted into the rotating shaft next to the filter piece 6. In addition, the large-diameter filtration plate 2 or the small-diameter filtration plate 3 can be inserted and configured so as to be positioned on the outer peripheral portion of the spacer 6s. It is also possible to configure as an interval holder for holding between the filter pieces in a filtration groove having a required interval.

  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.

Reference example 2

  The screw-type solid-liquid separation device 10S of Reference Example 2 will be described with reference to FIGS. 16 to 18. A screw conveyor 22 that rotates by being driven by a prime mover 23 is fitted in the center hole 21 of the laminated filter body 1. As the screw conveyor 22 is rotated, the screw blade 22B having an outer diameter smaller than the inner diameter of the convex filter pieces 5 and 5 and larger than the inner diameter of the filter plates 19 and 19 is rotated. The protrusions 5t 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 seats 20 ... 20 formed on the outside of the protrusion filter pieces 5 ... 5 The outer edges of the screw blades 22B are slidably contacted with the inner peripheral portions of the filter plates 19,... 19 loosely fitted between the stacks of the convex filter pieces 5,. Supply port 11 The stock solution of suspended sewage fed into the cylindrical laminated filter body 1 advances in the axial direction while swirling along the screw blade 22B, and between the laminated layers of the convex filter pieces 5 and 5 and the filtration plate 19. .. The filtered solid flow out of the filtered water discharge groove G formed by 19, and the solid content that has been dehydrated and has a low moisture content pushes the front discharge pressure adjustment valve 24 to push the solid content discharge port 12. It is configured to be discharged sequentially.

  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 Large diameter filtration plate 3 Small 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)
DESCRIPTION OF SYMBOLS 11 Stock solution supply port 12 Solid content discharge port 13 Filtrate drain port 14 Filtrate channel 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 (8)

Undiluted solution supply port and solid content discharge port,
A plurality of laminated filter bodies that are inserted into the outer periphery of the rotating shaft and formed with filtration grooves that allow the filtrate to pass therethrough,
The plurality of laminated filter bodies are arranged in two upper and lower rows between the stock solution supply port and the solid content discharge port,
The laminated filter body is arranged between a plurality of convex filter pieces integrally having convex elements protruding in the axial direction of the rotating shaft, and between the convex filter pieces so as to be movable in the axial direction, A solid-liquid separation device including a filtration plate fitted into a protrusion.   The said filtration plate has several large diameter filtration plates which have a larger diameter than the said convex filter piece, and several small diameter filtration plates which have a smaller diameter than the said convex filter piece. Solid-liquid separator.   The solid-liquid separation device according to claim 2, wherein the laminated filter body has the large-diameter filtration plate and the small-diameter filtration plate alternately arranged one by one in a gap between the adjacent convex filter pieces. The plurality of laminated filter bodies arranged in two upper and lower rows are arranged adjacent to each other for each row,
The outer peripheral edge of the large-diameter filtration plate of one of the laminated filter bodies arranged adjacent to each other is arranged so as to face the outer peripheral edge of the small-diameter filtration plate in the filtration groove of the other laminated filter body. The solid-liquid separation device according to claim 2 or 3.   The convex element is provided on a first convex element provided on one surface in the axial direction of the convex filter piece, and provided on the other axial surface of the convex filter piece, and the first convex element in the axial direction. The solid-liquid separation device according to any one of claims 1 to 4, further comprising a second protrusion having a protrusion height higher than that of the child.   6. The solid-liquid separator according to claim 1, wherein a plurality of the protrusions are provided on the surface of the protrusion filter piece at intervals in the circumferential direction.   The solid-liquid separation device according to any one of claims 1 to 6, wherein a depression is provided at a top portion of the convex element.   The solid-liquid separation device according to any one of claims 1 to 7, wherein the convex filter pieces are integrally formed of a resin material.

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