JP4041318B2

JP4041318B2 - Screw type filter dehydrator

Info

Publication number: JP4041318B2
Application number: JP2002045041A
Authority: JP
Inventors: 秀明金谷
Original assignee: Tsurumi Manufacturing Co Ltd
Current assignee: Tsurumi Manufacturing Co Ltd
Priority date: 2002-02-21
Filing date: 2002-02-21
Publication date: 2008-01-30
Anticipated expiration: 2022-02-21
Also published as: JP2003245797A

Description

【０００１】
【発明の技術分野】
本発明は、オキシデーションディッチ法等に代表される比較的小規模の下水処理作業において発生する懸濁微粒子を含む懸濁液を、濃縮工程を経由しない低濃度の状態により、濾液と懸濁微粒子とに分離するためのスクリュー式濾過脱水装置に関するものである。
【０００２】
【従来技術とその問題点】
複数枚の環状濾過プレートを互に細隙を隔てて積層状に配列させ、複数枚の環状可動プレートを上記環状濾過プレートの積層間に遊装させることにより上記各細隙を分離水流出溝とする筒状の濾過体に形成し、該濾過体の中心孔にスクリューコンベアを嵌装し、濾過体の始端開口部を汚泥原水の送り込み口とし終端開口部を脱水ケーキの送り出し口とするスクリュー式濾過脱水装置は公知である。
【０００３】
そして分離水流溝の溝幅を一定に保持させる手段として、一般的には特許第２８２６９９０号公報の図４等に示されるよう、各環状濾過プレート間にスペースを挟み込み、各環状濾過プレートの耳（座部）に突設されたボルト挿通孔とスペーサには、固定用のボルトを貫挿させて端部でネジ止めするという方式が採られている。
【０００４】
このように各環状濾過プレート間にスペーサを挟み込ませるという方式では、組立ての作業性が悪く製造コストを押し上げる一因にもなる。また、分解メンテナンスの作業性も不利なものとなる。
【０００５】
【発明の目的】
本発明の目的は、部品点数を減少させて組立ての作業性を高め、ローコスト化と低重量化を実現するとともにメンテナンス性に優れ、しかも従来と同一の機能を確実に保持したスクリュー式濾過脱水装置を提供することにある。
【０００６】
【発明の構成】
本発明に係る請求項１記載のスクリュー式濾過脱水装置は、複数枚の環状濾過プレートを互に細隙を隔てて積層状に配列させ、複数枚の環状可動プレートを上記環状濾過プレートの積層間に遊装させることにより上記各細隙を分離水流出溝とする筒状の濾過体に形成し、該濾過体の中心孔にスクリューコンベアを嵌装し、濾過体の始端開口部を汚泥原水の送り込み口とし終端開口部を脱水ケーキの送り出し口とするスクリュー式濾過脱水装置であって、各環状濾過プレートの外周には各環状可動プレートの外径よりも大径に形成された座部を有し、該座部の裏面に凹窩を形成させて表面へ打ち出された間隔保持用突子が、隣接する環状濾過プレートにおける座部と当接することにより前記分離水流出溝の溝幅を規整し、且つ、各座部の外周縁は環状可動プレートと非接触状に設けられた固定体内周に凸条と凹溝の係入からなる回り止め構造を介して支承させたことを特徴とする。また、本発明に係る請求項２記載のスクリュー式濾過脱水装置は、請求項１記載の構成を前提として、各座部の裏面に凹窩を形成させて表面へ打ち出された間隔保持用凸子を配設するについて、一の環状濾過プレートにおける座部の間隔保持用凸子と、隣接する環状濾過プレートにおける座部の凹窩とが重なり合わないよう、相互に変位させた位置に配設されていることを特徴とする。
【０００７】
【実施例】
以下実施例の図１ないし図４により説明をする。
【０００８】
１は筒状の濾過体であり、複数の環状濾過プレート２・・・・２を互に細隙を隔てて積層状に配列させ、複数の環状可動プレート３・・・・３を上記環状濾過プレート２・・・・２の積層間に遊装させることにより上記各細隙を分離水流出溝６・・・・６とし、各環状濾過プレート２の外周には各環状可動プレート３の外径よりも大径に形成された座部７・・・・７を有し、該座部７・・・・７の裏面に凹窩８・・・・８を形成させて表面へ打ち出された間隔保持用突子９・・・・９が、隣接する環状濾過プレート３における座部７・・・・７と当接することにより前記分離水流出溝６・・・・６の溝幅を各環状可動プレート３・・・・３の肉厚よりも僅かに大きく保持させるよう規整する。５・・・・５は樋状或いは枠状等の固定体であり、濾過体１の外周において各環状可動プレート３・・・・３と非接触状態架設され、凸条と凹溝の係入からなる回り止め構造４を介して各座部７・・・・７の外縁を支承する。前述した分離水流出溝６・・・・６の溝幅規整機能を更に高めるために、各座部７・・・・７の裏面に凹窩８・・・・８を形成させて表面へ打ち出された間隔保持用凸子９・・・・９を配設するについて、図４に示すよう、一の環状濾過プレート２における座部７ａの間隔保持用凸子９ａと、隣接する環状濾過プレート２における座部７ｂの凹窩８ｂとが重なり合わないよう、相互に変位させた位置に配設する。
【０００９】
濾過体１の始端開口部は汚水原水の送り込み口１０ａとなり終端開口部は脱水ケーキの送り出し口１０ｂとなり、中心孔１０にはスクリューコンベア１１を嵌装する。１２はスクリューコンベア１１を駆動するための原動機、１４は送り出し口１０ｂに付設された吐出圧調整弁である。一例として、スクリュー１１Ｒの外径が環状濾過プレート２の内径よりも小径で、環状可動プレート３の内径よりも大きく形成され、濾過体１の中心孔１０内におけるスクリューコンベア１１の駆動により懸濁微粒子を移送させると共に、スクリュー１１Ｒの前縁が環状可動プレート３・・・・３の内周部へ斜交状に摺設して該環状可動プレート３・・・・３を揺振させることにより、分離液流出溝６・・・・６の目詰りを防止する。別の実施態様として、スクリューコンベア１１はスクリュー１１Ｒの外径が環状濾過プレート２および環状可動プレート３の内径よりも若干小径に形成されており、原動機１２により駆動されて懸濁微粒子を移送させ、これと連動して濾過体７の外側に配設された偏心回転軸（図示せず）が偏心回転運動をし、環状可動プレート３・・・・３の外周と摺設して該環状可動プレート３・・・・３を揺振させるという方式でもよい。
【００１０】
【発明の効果】
本発明スクリュー式濾過脱水装置においては、分離水流出溝の溝幅を一定値に規整させるについて、従来のようなスペーサや固定用ボルト等を必要としないため、部品点数が少なくて組立ての作業性に優れ、ローコスト化と低重量化を実現し得られると共にメンテナンス性においても有利となる。
【図面の簡単な説明】
【図１】本発明の実施対象となるスクリュー式濾過脱水装置の構成を略示した縦断側面図である。
【図２】本発明スクリュー式濾過脱水装置における濾過体の正面図である。
【図３】本発明スクリュー式濾過脱水装置における濾過体の要部縦断側面図の拡大図である。
【図４】図２のＡ―Ａ横断平面の拡大図である。
【符号の説明】
１濾過体
２環状濾過プレート
３環状可動プレート
４回り止め構造
５固定体
６分離水流出溝
７座部
８凹窩
９間隔保持用凸子
１０中心孔
１０ａ送り込み口
１０ｂ送り出し口
１１スクリューコンベア[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a suspension containing suspended fine particles generated in a relatively small-scale sewage treatment operation represented by an oxidation ditch method, etc., in a low concentration state without passing through a concentration step, and the filtrate and suspended fine particles. The present invention relates to a screw-type filtration and dehydration device for separation into two.
[0002]
[Prior art and its problems]
A plurality of annular filtration plates are arranged in a stacked manner with a gap between each other, and a plurality of annular movable plates are idled between the laminations of the annular filtration plates, thereby separating each slit from the separation water outflow groove. A screw type with a screw conveyor fitted in the center hole of the filter body, a starting end opening of the filter body as an inlet for sludge raw water, and a terminal opening as an outlet for a dehydrated cake Filtration dehydrators are known.
[0003]
As a means for keeping the width of the separation water flow groove constant, generally, as shown in FIG. 4 of Japanese Patent No. 2826990, a space is sandwiched between the annular filtration plates, and the ears ( The bolt insertion hole and the spacer projecting on the seat) are fitted with fixing bolts and screwed at the ends.
[0004]
As described above, the method in which the spacers are sandwiched between the respective annular filtration plates is inferior in assembling workability and increases the manufacturing cost. Moreover, workability of the disassembly maintenance is also disadvantageous.
[0005]
OBJECT OF THE INVENTION
The object of the present invention is to improve the workability of assembly by reducing the number of parts, realize low cost and low weight, have excellent maintainability, and reliably retain the same function as before. Is to provide.
[0006]
[Structure of the invention]
The screw type filtration dewatering device according to claim 1 of the present invention is configured such that a plurality of annular filtration plates are arranged in a stacked manner with a gap between each other, and the plurality of annular movable plates are arranged between the stacked layers of the annular filtration plates. Are formed into a cylindrical filter body having the slits as separation water outflow grooves, a screw conveyor is fitted in the center hole of the filter body, and the starting end opening of the filter body is formed in the sludge raw water. A screw-type filtration and dewatering device having a feed opening and a terminal opening as a dewatering cake delivery port, and a seat formed on the outer periphery of each annular filtration plate having a diameter larger than the outer diameter of each annular movable plate. Then, the spacing projections formed on the back surface of the seat portion with a recess formed on the surface abuts against the seat portion of the adjacent annular filtration plate to regulate the width of the separated water outflow groove. And the outer periphery of each seat Characterized in that it is supported via the detent structure comprising a fixed body circumference provided on the annular movable plate and a non-contact manner from engaging inlet of ridges and grooves. Moreover, the screw type filter dehydrating device according to claim 2 of the present invention is based on the configuration according to claim 1 and is formed with a recess on the back surface of each seat portion, and is projected to the surface. The protrusions for maintaining the spacing between the seats in one annular filtration plate and the recesses in the seats in the adjacent annular filtration plates are arranged at positions displaced from each other. It is characterized by.
[0007]
【Example】
The embodiment will be described below with reference to FIGS.
[0008]
Reference numeral 1 denotes a cylindrical filter, in which a plurality of annular filtration plates 2... 2 are arranged in a stacked manner with a gap between each other, and a plurality of annular movable plates 3. The above-mentioned slits are separated into the separated water outflow grooves 6... 6 by playing between the stacked plates 2... 2, and the outer diameter of each annular movable plate 3 is provided on the outer periphery of each annular filtration plate 2. .. 7 having a seat portion 7... 7 formed with a larger diameter than that, and a recess 8... 8 formed on the back surface of the seat portion 7. The holding protrusions 9... 9 are in contact with the seats 7... 7 of the adjacent annular filtration plates 3 so that the groove widths of the separated water outflow grooves 6. The plates 3... Are adjusted so as to be held slightly larger than the wall thickness. 5 .... 5 is a fixed body such as a trough-like or frame-like, on the outer circumference of the filter body 1 and the annular movable plate 3 ... 3 are bridged non-contact state, the convex strip and engaging the groove entrance The outer edges of the seats 7... 7 are supported through a detent structure 4 comprising the following. In order to further enhance the groove width regulating function of the separated water outflow grooves 6... 6 described above, the recesses 8. As shown in FIG. 4, the spacing holding projections 9a of the seat portion 7a in the one annular filtration plate 2 and the adjacent annular filtration plates 2 are arranged. Are arranged at positions displaced from each other so that they do not overlap with the recess 8b of the seat 7b.
[0009]
The starting end opening of the filter body 1 serves as a raw water feed-in port 10a, and the terminal opening serves as a dewatered cake feed-out port 10b, and a screw conveyor 11 is fitted into the center hole 10. 12 is a prime mover for driving the screw conveyor 11, and 14 is a discharge pressure adjusting valve attached to the delivery port 10b. As an example, the outer diameter of the screw 11R is smaller than the inner diameter of the annular filtration plate 2 and larger than the inner diameter of the annular movable plate 3, and suspended fine particles are driven by the screw conveyor 11 in the center hole 10 of the filter body 1. , And the front edge of the screw 11R is slid obliquely to the inner periphery of the annular movable plate 3... 3 to shake the annular movable plate 3. The clogging of the separation liquid outflow grooves 6... 6 is prevented. As another embodiment, the screw conveyor 11 is formed such that the outer diameter of the screw 11R is slightly smaller than the inner diameter of the annular filtration plate 2 and the annular movable plate 3, and is driven by the prime mover 12 to transfer suspended fine particles, In conjunction with this, an eccentric rotating shaft (not shown) disposed outside the filter body 7 performs an eccentric rotating motion, and slides on the outer periphery of the annular movable plate 3. 3... 3 may be shaken.
[0010]
【The invention's effect】
In the screw filtration dewatering device of the present invention, since the groove width of the separation water outflow groove is regulated to a constant value, a conventional spacer, fixing bolt, etc. are not required, so the number of parts is small and assembly workability is reduced. In addition, it is possible to realize low cost and low weight and is advantageous in terms of maintainability.
[Brief description of the drawings]
FIG. 1 is a vertical side view schematically showing a configuration of a screw type filtration dehydration apparatus to be an object of the present invention.
FIG. 2 is a front view of a filter body in the screw-type filter dehydrator of the present invention.
FIG. 3 is an enlarged view of a longitudinal sectional side view of a main part of a filter body in the screw type filter dehydrator of the present invention.
4 is an enlarged view of the AA transverse plane of FIG. 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Filter body 2 Annular filtration plate 3 Annular movable plate
DESCRIPTION OF SYMBOLS 4 Anti- rotation structure 5 Fixed body 6 Separation water outflow groove 7 Seat part 8 Concave 9 Space | interval convexity 10 Center hole 10a Delivery port 10b Delivery port 11 Screw conveyor

Claims

A plurality of annular filtration plates are arranged in a stack with a gap between each other, and a plurality of annular movable plates are mounted between the laminations of the annular filtration plates, thereby separating each of the slits into a separation water outflow groove. Screw type with a screw conveyor fitted in the central hole of the filter body, the starting end opening of the filter body as a feed port for sludge raw water, and the terminal opening as a feed port for dehydrated cake A filtration dewatering device having a seat portion formed on the outer periphery of each annular filtration plate having a diameter larger than the outer diameter of each annular movable plate, and forming a recess on the back surface of the seat portion to the surface. The distance-projecting protrusions that have been struck contact the seats in the adjacent annular filter plates to regulate the width of the separated water outflow groove, and the outer peripheral edge of each seat is not in contact with the annular movable plate fixed body circumference projection provided on Jo Characterized in that it is supported via a detent structure consisting of groove engagement entry of the screw-type filtering and dewatering device.

Regarding the arrangement of the spacing holding protrusions formed on the back surface by forming a recess on the back surface of the seat portion, the spacing holding projections of the seat portion in one annular filtration plate and the adjacent annular filtration plate The screw-type filtration and dewatering device according to claim 1, wherein the screw-type filtration and dehydration device is disposed at positions displaced from each other so that the concave portion of the seat does not overlap.