JP2004160323A

JP2004160323A - Screw type filtering dehydrator

Info

Publication number: JP2004160323A
Application number: JP2002327735A
Authority: JP
Inventors: Tatsuya Chiga; 達也千賀
Original assignee: Tsurumi Manufacturing Co Ltd
Current assignee: Tsurumi Manufacturing Co Ltd
Priority date: 2002-11-12
Filing date: 2002-11-12
Publication date: 2004-06-10
Anticipated expiration: 2022-11-12
Also published as: JP3936279B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw type filtering dehydrator which enhances assembling workability to reduce the cost of a product, excellent in disassembling maintenance properties, easily alters the set interval between respective annular filter plates and performs the rearrangement of a filter member rapidly and properly. <P>SOLUTION: In the screw type filtering dehydrator constituted by fitting and mounting a screw conveyor 11 in the center hole 10 of the cylindrical filter member, insert projections 6 are fixed in the mounting holes of the lugs (peripheral seat parts) 5 of the annular filter plates 2 as the interval regulating means between the respective annular filter plates 2 constituting the filter member. At least two kinds of the annular filter plates, which have the insert projections 6 having a different projected wall thickness and display the wall thickness difference by color, are prepared and the specific annular filter plates selected by color are laminated to constitute the filter member. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は例えば、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】
【従来の技術】
複数枚の環状濾過プレートを所要の間隔を保持して積層状に配列させ、該環状濾過プレートの各積層間にそれぞれ環状可動プレートを遊嵌して各プレート間の細隙を濾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り、各環状濾過プレート間の間隔規整手段として従来は、各環状濾過プレート間にスペーサを挟み込み、各環状濾過プレートの耳（座部）に穿設されたボルト挿通孔とスペーサに、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（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開２０００−２８８５９８号公報（図１−４）
【０００４】
【発明が解決しょうとする課題】
特許文献１に示された固液分離装置のように、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り、且つ分解メンテナンスの作業性も不利なものとなる。また、処理対象となる汚泥の濃度や性状等に対応させて濾水流出溝の溝巾調節の必要を生じることがしばしばであり、この溝巾調節は各環状濾過プレート間の間隔変更によって行われるが、そのためには厚みの異なる各種のスペーサを予じめ準備しておき、設定間隔に見合ったスペーサを用いて濾過体の組替えを行わなければならず、特に汚水処理現場においてそれを行う場合には、スペンサーの取違えや紛失等を生じ易く多大の困難を伴うものである。
【０００５】
本発明は、組立ての作業性を高めて製品のローコスト化を実現すると共に分解メンテナンス性にも優れ、各環状濾過プレート間の設定間隔変更も容易で、特に汚水処理現場において部材の取違いや紛失等を生じることなく濾過体の組替えが迅速適正に行えるスクリュー式濾過脱水装置の提供を目的とする。
【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所要の間隔を保持して積層状に配列させ、該環状濾過プレートの各積層間にそれぞれ環状可動プレートを遊嵌して各プレート間の細隙を濾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の複数個所に各環状可動プレートの外周の偏心回転軌跡よりも外側へ導出された座部を有し、各座部に後記インサート凸子の嵌着孔を穿設し、該嵌着孔を通じて各座部の表裏両面から定着されたインサート凸子の凸出肉厚により各環状濾過プレート間の間隔を規整し、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に支承させた。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記載のスクリュー式濾過脱水装置を前提として、座部における凸出肉厚を異にし且つ該肉厚の異なりによって色分けされたインサート凸子を定着させた二種以上の環状濾過プレートが準備され、積層状に配列するについて上記色分けによって選定された特定の環状濾過プレートが使用されるよう構成した。
【０００７】
【実施例】
以下図１ないし図８の実施例により説明をする。
【０００８】
１は筒状の濾過体であり、多数枚の環状濾過プレート２・・２を所要の間隔を保持して積層状に定着させ、該環状濾過プレート２・・２の各積層間にそれぞれ環状可動プレート３・・３を遊嵌して各プレート間の細隙を濾水流出溝４・・４に形成する。各環状濾過プレート２・・２の外周には複数個所に亘って各環状可動プレート３・・３の外周の偏心回転軌跡よりも外側へ導出された座部５・・５を有し、各座部５・・５に定着されたインサート凸子６・・６により、各環状濾過プレート２・・２間の間隔を各環状可動プレート３・・３の肉厚よりも若干大きく保持させるよう規整する。６Ｈは座部に穿設された嵌着孔であり、該嵌着孔６Ｈを通じて各座部５の表裏両面からインサート凸子６を定着させる。その定着方法としては図３に例示するようなセットピンによる方法、或いは図４に例示するような鳩目方式であってもよく、材質としては着色の容易な樹脂が好適である。７・・７は各座部５・・５を支承する固定体であり、濾過体１の外側に沿うように環状可動プレート３・・３とは非接触状態を保って架設され、その前後両端部はセットブラケット１４、１４に定着されている。
【０００９】
上述のように構成された濾過体１は、例えば貯溜槽（図示せず）の上方に横設され、その始端開口部は汚泥原水の送り込み口８となり終端開口部は脱水ケーキの送り出し口９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、１３は送り出し口９に付設された吐出圧調整弁である。一例として実地例の図２のように、スクリューコンベア１１はスクリューブレード１１Ｂ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の内径よりは大きく形成されており、原動機１２により駆動されて懸濁微粒子を移送させると共にスクリューブレード１１Ｂの外縁が環状可動プレート３・・３の内周部へ斜交状に摺接して該環状可動プレート３・・３を偏心回転させることにより、濾水流出溝４・・４の目詰まりを防止する。該環状可動プレート３・・３を偏心回転させる別の実施様態として、スクリューブレード１１Ｂの外径が環状濾過プレート２・・２および環状可動プレート３・・３の内径よりも若干小径に形成されており、スクリューコンベア１１の駆動と連動して濾過体１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の外周と摺接して該環状可動プレート３・・３を偏心回転させるという方式であってもよい。
【００１０】
各環状濾過プレート２・・２間の間隔は各座部５・・５に定着されたインサート凸子６・・６の凸出肉厚によって規整される。例えば図５に示すよう、インサート凸子６・・６を定着させた環状濾過プレート２とインサート凸子の定着されていない環状濾過プレート２とを交互に積層させた場合には、インサート凸子６の凸出肉厚が環状濾過プレート２、２間の間隔となる。また、図６に示すよう、インサート凸子６・・６の定着されている環状濾過プレート２のみを積層させた場合には、隣り合って対向する両インサート凸子６、６の凸出肉厚の和が環状濾過プレート２、２間の間隔となる。濾水流出溝４・・４の溝巾は、処理対象となる汚泥の濃度や性状等に対応させて調節可能であることが望ましいが、その調節は各環状濾過プレート間の間隔変更によって実現される。従って、座部５・・５におけるインサート凸６・・６の凸出肉厚が異なる数種類の環状濾過プレート２を予じめ準備しておき、汚泥の濃度や性状等に対応させて適切な環状濾過プレート２・・２を選定して濾過体１を積層させればよい。また、インサート凸子６の出肉厚が色彩によって視認できるよう色分けしておけば便利である。
【００１１】
【発明の効果】
本発明スクリュー式濾過脱水装置によれば、組立ての作業性が高められて製品のローコスト化が実現し得られると共に分解メンテナンス性にも優れ、各環状濾過プレート間の設定間隔変更も容易で、特に汚水処理現場において部材の取違いや紛失等を生じることなく濾過体の組替えが迅速適正に行なえるという利点がある。
【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】本発明装置の縦断正面図である。
【図３】本発明装置の環状濾過プレートにおける座部へセットピンによりインサート凸子を定着させた事例を示す要部縦断側面図である。
【図４】本発明装置の環状濾過プレートにおける座部へ鳩目方式によりインサート凸子を定着させた事例を示す要部縦断側面図である。
【図５】本発明装置における濾過体の要部側面図であって、インサート凸子を定着させた環状濾過プレートとインサート凸子の定着されていない環状濾過プレートとを交互に積層させた事例を示す。
【図６】本発明装置における濾過体の要部側面図であって、インサート凸子の定着されている環状濾過プレートのみを積層させた事例を示す。
【図７】本発明装置における環状濾過プレートの正面図であって、座部にインサート凸子が付設されていない状態を示す。
【図８】本発明装置における環状濾過プレートの正面図であって、座部にインサート凸子が付設されている状態を示す。
【符号の説明】
１筒状の濾過体
２環状濾過プレート
３環状可動プレート
４濾水流出溝
５座部
６インサート凸子
６Ｈインサート凸子の嵌着孔
７固定体
８汚泥原水の送り込み口
９脱水ケーキの送り出し口
１０濾過体の中心孔
１１スクリューコンベア[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention, for example, a suspension containing suspended fine particles generated in a relatively small-scale sewage treatment work represented by the oxidation ditch method and the like, by a low concentration state without passing through the concentration step, the suspension with the filtrate The present invention relates to a screw-type filtration dewatering apparatus for separating fine particles into fine particles.
[0002]
[Prior art]
A plurality of annular filtration plates are arranged in a stack while maintaining a required interval, and an annular movable plate is loosely fitted between the respective stacks of the annular filter plates to form a gap between the respective plates with a drainage outflow groove. A screw conveyer is fitted in the center hole of the filter body, and a screw type having a start end opening of the filter body as a feed port for sludge raw water and an end end portion as a discharge port of a dewatered cake. Filtration and dewatering devices are known, and as a means for regulating the spacing between the annular filtration plates, conventionally, a spacer is interposed between the annular filtration plates, and a bolt insertion hole drilled in an ear (seat) of each annular filtration plate. There has been adopted a method in which a fixing bolt is inserted through a spacer and screwed at an end (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2000-288598 A (FIG. 1-4)
[0004]
[Problems to be solved by the invention]
In a system in which a spacer is interposed between the annular filtration plates as in the solid-liquid separation device shown in Patent Document 1, the workability of assembly is poor, which contributes to increasing the manufacturing cost, and the work of disassembly maintenance. Sex is also disadvantageous. In addition, it is often necessary to adjust the width of the drainage outflow grooves in accordance with the concentration and properties of the sludge to be treated, and this width adjustment is performed by changing the interval between the annular filtration plates. However, for that purpose, various types of spacers having different thicknesses must be prepared in advance, and the filter must be rearranged using spacers that match the set interval, especially when it is performed at a sewage treatment site. Is easy to mix up or lose the spencer, which involves great difficulty.
[0005]
INDUSTRIAL APPLICABILITY The present invention enhances assembly workability, realizes low cost of products, is excellent in disassembly and maintenance, can easily change the setting interval between each annular filtration plate, and particularly, in the case of sewage treatment, misplacement or loss of members. It is an object of the present invention to provide a screw-type filtration and dewatering apparatus capable of promptly and appropriately changing a filter body without causing any problem.
[0006]
Configuration of the Invention
The screw-type filtration dehydrator according to claim 1 of the present invention arranges a plurality of annular filtration plates in a stacked state while maintaining a required interval, and respectively arranges an annular movable plate between the stacked layers of the annular filtration plates. The filter body is loosely fitted to form a cylindrical filter body having a gap between each plate as a drainage drainage groove, a screw conveyor is fitted in the center hole of the filter body, and the opening at the starting end of the filter body is made of raw sludge water. A screw-type filtration and dewatering apparatus having a feed port and a terminal opening as a discharge port for a dewatering cake. Each of the seats is provided with a hole for fitting an insert protrusion, which will be described later, and each of the annular filters is formed by the protrusion thickness of the insert protrusion fixed from both the front and back surfaces of each seat through the fit hole. Adjust the spacing between the plates And, the outer peripheral edge of each seat is then supported by a fixed body provided in an annular movable plate and a non-contact form. Further, the screw-type filtration and dewatering device according to claim 2 of the present invention is based on the screw-type filtration and dehydration device according to claim 1 and has different projection thicknesses at the seat portion and is color-coded according to the thickness difference. Two or more types of annular filtration plates on which the insert protrusions were fixed were prepared, and a specific annular filtration plate selected by the above-described color coding for arrangement in a stacked configuration was used.
[0007]
【Example】
This will be described below with reference to the embodiment shown in FIGS.
[0008]
Reference numeral 1 denotes a cylindrical filter, which fixes a large number of annular filtration plates 2... 2 in a laminated state while maintaining a required interval, and is annularly movable between the laminated layers of the annular filtration plates 2. The plates 3 are loosely fitted to form gaps between the plates in the drainage outflow grooves 4. The outer periphery of each annular filtration plate 2,... 2 has a plurality of seats 5. The fixing between the annular filtration plates 2,... 2 is set to be slightly larger than the thickness of each of the annular movable plates 3,. . Reference numeral 6H denotes a fitting hole formed in the seat, and the insert projection 6 is fixed from both the front and back surfaces of each seat 5 through the fitting hole 6H. As a fixing method, a method using a set pin as illustrated in FIG. 3 or an eyelet method as illustrated in FIG. 4 may be used, and a resin which is easily colored is suitable as a material. 7, 7 are fixed bodies for supporting the respective seat portions 5,..., And are mounted along the outside of the filter body 1 in a non-contact state with the annular movable plates 3,. The part is fixed to the set brackets 14, 14.
[0009]
The filter body 1 configured as described above is, for example, provided horizontally above a storage tank (not shown), and its opening at the beginning is an inlet 8 for raw sludge water and its end is at an outlet 9 for a dehydrated cake. A screw conveyor 11 is fitted in the center hole 10. Reference numeral 12 denotes a prime mover for driving the screw conveyor 11, and reference numeral 13 denotes a discharge pressure adjusting valve attached to the delivery port 9. As an example, as shown in FIG. 2 of a practical example, the screw conveyor 11 is formed such that the outer diameter of the screw blade 11 </ b> B is smaller than the inner diameter of the annular filtration plate 2 and larger than the inner diameter of the annular movable plate 3. The suspended blades are driven to transfer the suspended fine particles, and the outer edge of the screw blade 11B slides obliquely to the inner peripheral portion of the annular movable plate 3 to eccentrically rotate the annular movable plate 3. The clogging of the drainage drain grooves 4 is prevented. As another embodiment for eccentrically rotating the annular movable plates 3,..., The outer diameter of the screw blade 11B is formed to be slightly smaller than the inner diameters of the annular filtration plates 2,. The eccentric rotary shaft (not shown) provided outside the filter body 1 performs an eccentric rotary motion in conjunction with the driving of the screw conveyor 11 and slides on the outer periphery of the annular movable plates 3. A method of rotating the annular movable plates 3 eccentrically may be used.
[0010]
The spacing between the annular filtration plates 2,... 2 is regulated by the projecting wall thickness of the insert projections 6,. For example, as shown in FIG. 5, when the annular filtration plate 2 on which the insert projections 6 are fixed and the annular filtration plate 2 on which the insert projections are not fixed are alternately laminated, the insert projection 6 Is the distance between the annular filtration plates 2. In addition, as shown in FIG. 6, when only the annular filtration plates 2 on which the insert protrusions 6 are fixed are stacked, the protrusion thickness of the adjacent insert protrusions 6, 6 which are adjacent to each other. Is the distance between the annular filtration plates 2, 2. It is desirable that the width of the drainage outflow grooves 4 can be adjusted in accordance with the concentration and properties of the sludge to be treated, but the adjustment is realized by changing the interval between the annular filtration plates. You. Therefore, several kinds of annular filtration plates 2 having different projecting wall thicknesses of the insert projections 6 in the seats 5 are prepared in advance, and an appropriate annular filtration plate is prepared according to the concentration and properties of sludge. What is necessary is just to select the filtration plates 2. Further, it is convenient to color-code the insert protrusion 6 so that the thickness of the protrusion can be visually recognized by color.
[0011]
【The invention's effect】
According to the screw-type filtration dewatering apparatus of the present invention, the workability of assembly is enhanced, the cost of the product can be reduced, the disassembly and maintenance properties are excellent, and the set interval between the annular filtration plates can be easily changed. There is an advantage that the filter body can be quickly and properly rearranged at the sewage treatment site without the members being mixed or lost.
[Brief description of the drawings]
FIG. 1 is a vertical sectional side view schematically showing the configuration of a screw-type filtration and dewatering apparatus to which the present invention is applied.
FIG. 2 is a vertical sectional front view of the device of the present invention.
FIG. 3 is a vertical sectional side view of a main part showing an example in which an insert projection is fixed to a seat portion of a ring filter plate of the present invention with a set pin by a set pin.
FIG. 4 is a longitudinal sectional side view showing a main part of an example in which an insert projection is fixed to a seat of an annular filtration plate of the apparatus of the present invention by an eyelet method.
FIG. 5 is a side view of a main part of a filter in the apparatus of the present invention, showing an example in which an annular filter plate having an insert protrusion fixed thereon and an annular filter plate having no insert protrusion fixed thereto are alternately laminated. Show.
FIG. 6 is a side view of a main part of a filter in the apparatus of the present invention, showing an example in which only an annular filter plate on which an insert projection is fixed is stacked.
FIG. 7 is a front view of an annular filtration plate in the apparatus of the present invention, showing a state where an insert projection is not attached to a seat portion.
FIG. 8 is a front view of an annular filtration plate in the apparatus of the present invention, showing a state where an insert projection is attached to a seat portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical filter body 2 Annular filtration plate 3 Annular movable plate 4 Drainage outflow groove 5 Seat 6 Insert convex 6H Insert convex hole 7 Fixed body 8 Sludge raw water inlet 9 Dewater cake outlet 10 Center hole 11 of filter body Screw conveyor

Claims

複数枚の環状濾過プレートを所要の間隔を保持して積層状に配列させ、該環状濾過プレートの各積層間にそれぞれ環状可動プレートを遊嵌して各プレート間の細隙を濾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の複数個所に各環状可動プレートの外周の偏心回転軌跡よりも外側へ導出された座部を有し、各座部に後記インサート凸子の嵌着孔を穿設し、該嵌着孔を通じて各座部の表裏両面から定着されたインサート凸子の凸出肉厚により各環状濾過プレート間の間隔を規整し、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に支承させたことを特徴とする、スクリュー式濾過脱水装置。A plurality of annular filtration plates are arranged in a stack while maintaining a required interval, and an annular movable plate is loosely fitted between the respective stacks of the annular filter plates to form a gap between the respective plates with a drainage outflow groove. A screw conveyer is fitted in the center hole of the filter body, and a screw type having a start end opening of the filter body as a feed port for sludge raw water and an end opening part as a discharge port of a dewatered cake. A filtration dewatering apparatus, having seats led out of the eccentric rotation locus of the outer periphery of each annular movable plate at a plurality of positions on the outer periphery of each annular filtration plate, and a fitting of an insert protrusion described later on each seat. A hole is formed, an interval between the annular filtration plates is regulated by a protrusion thickness of the insert protrusion fixed from both front and back surfaces of each seat through the fitting hole, and an outer peripheral edge of each seat is formed. Is set in non-contact with the annular movable plate. Characterized in that is supported on was fixed body, screw filtering and dewatering device.

座部における凸出肉厚を異にし且つ該肉厚の異なりによって色分けされたインサート凸子を定着させた二種以上の環状濾過プレートが準備され、積層状に配列するについて上記色分けによって選定された特定の環状濾過プレートが使用されることを特徴とする、請求項１記載のスクリュー式濾過脱水装置。Two or more types of annular filtration plates having different protrusion thicknesses on the seat portion and fixing the insert protrusions color-coded by the difference in the thickness were prepared, and were selected by the above-described color coding for the arrangement in a stack. The screw filtration dewatering device according to claim 1, wherein a specific annular filtration plate is used.