JP2001321990A - Screw press - Google Patents

Screw press

Info

Publication number
JP2001321990A
JP2001321990A JP2000140366A JP2000140366A JP2001321990A JP 2001321990 A JP2001321990 A JP 2001321990A JP 2000140366 A JP2000140366 A JP 2000140366A JP 2000140366 A JP2000140366 A JP 2000140366A JP 2001321990 A JP2001321990 A JP 2001321990A
Authority
JP
Japan
Prior art keywords
cylindrical screen
outer cylindrical
screen
screw
screw press
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2000140366A
Other languages
Japanese (ja)
Inventor
Hiroyuki Yamada
浩之 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NGK Insulators Ltd
Original Assignee
NGK Insulators Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NGK Insulators Ltd filed Critical NGK Insulators Ltd
Priority to JP2000140366A priority Critical patent/JP2001321990A/en
Publication of JP2001321990A publication Critical patent/JP2001321990A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B9/00Presses specially adapted for particular purposes
    • B30B9/02Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/121Screw constructions

Abstract

PROBLEM TO BE SOLVED: To easily eliminate clogging of a filtering hole of an outer cylindrical screen without substantially using cleaning water. SOLUTION: A screen press is provided with an outer cylindrical screen and a screw shaft mounted inside the screen so as to be freely rotatable and erecting a helical screw blade on an outer periphery. Along a tip 14a of the screw blade, a flexible forming body 2 made of an elastic body like rubber to form a recessed groove 21 is fitted to an upper part, the upper tips 22a, 22a interposing the recessed groove 21 are extended/contracted by a water pressure toward an inner wall of the cylindrical screen so as to be freely contactable/separatable. Further, by adjusting the pressure of fluid poured to a bottom inside passage 23 of the recessed groove 21, a bottom face 24 of the recessed groove 21 is elevated, the space formed by the recessed groove 21 is expanded/contracted.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、下水処理などから
生じる有機性含水汚泥の脱水に供せられるスクリュープ
レスの改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a screw press used for dehydrating organic hydrous sludge generated from sewage treatment or the like.

【0002】[0002]

【従来の技術】従来、機械的操作に基づく固液分離操作
は、経済性に優れているので種々の改良が行われてき
た。特に、下水処理などで大量に発生する汚泥の最終処
理においては、濃縮、脱水、乾燥、焼却、固形化など容
量をできるだけ減少させ、質的な安定化と無害化が図ら
れる。このうち、脱水操作は少ないエネルギーで汚泥の
容量を大幅に減少させる操作として非常に重要である
が、脱水性の良くない汚泥として知られている下水処理
などから生じる有機性含水汚泥の脱水にスクリュープレ
スを用いた脱水が実用化されてきた。
2. Description of the Related Art Conventionally, a solid-liquid separation operation based on a mechanical operation has been variously improved because of its economical efficiency. In particular, in the final treatment of sludge generated in large quantities in sewage treatment and the like, the capacity is reduced as much as possible, such as concentration, dehydration, drying, incineration, and solidification, and qualitative stabilization and harmlessness are achieved. Of these, the dewatering operation is very important as an operation to greatly reduce the volume of sludge with a small amount of energy, but a screw is used to dewater organic hydrous sludge generated from sewage treatment known as sludge with poor dewaterability. Dehydration using a press has been put to practical use.

【0003】このスクリュープレスとは、外筒スクリー
ン中に含水汚泥をスクリュー軸によって押し込んで、そ
の圧縮によって水分を分離する装置であり、図1にその
一例を示す。すなわち、スクリュープレスは、水分が通
過できる目開きの無数のろ過孔を外周面に有する筒状部
材である外筒スクリーン11とその外筒スクリーン11
の内部に装着されたスクリュー軸12から主に構成され
る。この外筒スクリーン11の一端には被処理物を送入
する入口部17が設けられ、またこのスクリュー軸12
は、入口側(図1の右側)から出口側(図1の左側)に
向かって外径を大きく形成したテーパ形状の軸体13の
外周にらせん状スクリュー羽根14を立設して構成さ
れ、外部に設置した駆動モータ15によって回転可能に
前記外筒スクリーン11内に装着されている。
[0003] The screw press is a device in which hydrated sludge is pushed into an outer cylindrical screen by a screw shaft and water is separated by its compression. An example is shown in FIG. That is, the screw press is composed of an outer cylindrical screen 11 which is a cylindrical member having an innumerable filtration holes with openings on the outer peripheral surface through which moisture can pass, and the outer cylindrical screen 11.
It is mainly composed of a screw shaft 12 mounted inside the. One end of the outer cylindrical screen 11 is provided with an inlet portion 17 for feeding an object to be processed.
The spiral screw blade 14 is erected on the outer periphery of a tapered shaft body 13 having an outer diameter increasing from an inlet side (right side in FIG. 1) toward an outlet side (left side in FIG. 1). It is rotatably mounted in the outer cylinder screen 11 by a drive motor 15 installed outside.

【0004】このような外筒スクリーン11とスクリュ
ー軸12との構造において、外筒スクリーン11の入口
部17から送入された含水汚泥は、前記スクリュー軸1
2を回転させることによりスクリュー羽根14によって
他端方向(図1の左方向)に押圧され移動することにな
るが、この際、スクリュー羽根14の押圧力と、外筒ス
クリーン11とスクリュー軸12との間の空間が狭くな
ることによって、汚泥は高い圧縮力を受け、その含有水
分は前記外筒スクリーン11のろ過孔を通じて外部に押
し出され、汚泥の水分は減少する。かくして、汚泥は出
口側に移動するに従い脱水され、脱水汚泥となって、他
端側の外筒スクリーン11とスクリュー軸12との端末
部分の隙間で形成される出口部16から排出される。
[0004] In such a structure of the outer cylindrical screen 11 and the screw shaft 12, the hydrated sludge fed from the inlet 17 of the outer cylindrical screen 11 is supplied to the screw shaft 1.
By rotating the screw 2, it is pressed and moved by the screw blade 14 toward the other end (to the left in FIG. 1). At this time, the pressing force of the screw blade 14, the outer screen 11 and the screw shaft 12 The sludge is subjected to a high compressive force due to the narrow space between them, and the water content thereof is pushed out to the outside through the filtration holes of the outer cylindrical screen 11, and the water content of the sludge decreases. Thus, the sludge is dehydrated as it moves to the outlet side, becomes dewatered sludge, and is discharged from the outlet portion 16 formed by the gap between the terminal portions of the outer cylindrical screen 11 and the screw shaft 12 at the other end.

【0005】このようなスクリュープレスの場合、脱水
操作を長時間行うと、汚泥中の固形分が前記外筒スクリ
ーン11のろ過孔に目詰まりして、ろ過効率が低下する
ことになる。このようなろ過孔の目詰まりに対しては、
前記外筒スクリーン11の外周に向けて洗浄水を噴射す
る洗浄ノズル(図示せず)を適宜に配置して、目詰まり
が発生した都度、洗浄水を噴射してろ過孔中の固形分を
除去するように配慮されている。
In the case of such a screw press, if the dewatering operation is performed for a long time, the solid content in the sludge is clogged in the filtration holes of the outer cylindrical screen 11, and the filtration efficiency is reduced. For such clogging of the filtration hole,
A washing nozzle (not shown) for spraying washing water toward the outer periphery of the outer cylindrical screen 11 is appropriately arranged, and whenever clogging occurs, washing water is sprayed to remove solids in the filtration holes. It is considered to be.

【0006】ところが、このような目詰まり除去方法の
場合、脱水操作の過程では、外筒スクリーン11内部に
は汚泥が充填されているので、洗浄水の噴射圧力を高め
ても固形物の除去は容易ではなく、長時間を要し、かつ
大量の洗浄水を消費するという問題があった。また、図
1に例示するように、外筒スクリーン11が回転しない
固定型の場合は、前記洗浄ノズルを多数本配置しなけれ
ばならないという、重装備の洗浄設備が必要となる設備
費面の不具合もあった。
However, in the case of such a clogging removing method, sludge is filled in the outer cylindrical screen 11 during the dewatering operation, so that even if the injection pressure of the washing water is increased, solid matter can be removed. It is not easy, requires a long time, and consumes a large amount of washing water. In addition, as shown in FIG. 1, in the case of a fixed type in which the outer cylindrical screen 11 does not rotate, a large number of cleaning nozzles must be arranged, which is a disadvantage in terms of equipment cost that requires heavy equipment for cleaning. There was also.

【0007】[0007]

【発明が解決しようとする課題】本発明は、上記の問題
点を解決するためになされたものであり、脱水操作過程
で生じる外筒スクリーンのろ過孔の目詰まりを洗浄水を
殆ど使用することなく簡単に解消することが可能となる
スクリュープレスを提供する。
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is intended to use almost all of the washing water for clogging of a filtration hole of an outer cylindrical screen which occurs during a dehydrating operation. A screw press that can be easily removed without any problem.

【0008】[0008]

【課題を解決するための手段】上記の問題は、外筒スク
リーンとその外筒スクリーンの内部に回転可能に装着さ
れ、らせん状スクリュー羽根を外周に立設した内筒コー
ンとを備え、外筒スクリーンの一端側入口部から送入さ
れた含水汚泥を前記内筒コーンを回転させることにより
他端方向に圧縮しながら移動させ、その水分を前記外筒
スクリーンを通じて押し出して脱水するとともに、他端
側出口部から脱水汚泥を排出するようにしたスクリュー
プレスにおいて、前記スクリュー羽根の先端に沿って、
凹溝を前記外筒スクリーンの内壁に向けて接離可能に備
え、目詰まり固形物を押し出し可能とした目詰まり防止
手段を配設したことを特徴とする本発明のスクリュープ
レスによって解決することができる。
An object of the present invention is to provide an outer cylinder screen comprising: an outer cylinder screen; and an inner cylinder cone rotatably mounted inside the outer cylinder screen and having a spiral screw blade provided on the outer periphery thereof. The wet sludge fed from the inlet at one end of the screen is moved while compressing in the other end direction by rotating the inner cylinder cone, and the moisture is pushed out through the outer cylinder screen to be dewatered, while the other end is dewatered. In the screw press to discharge the dewatered sludge from the outlet, along the tip of the screw blade,
The problem can be solved by the screw press according to the present invention, characterized in that a concave groove is provided so as to be able to approach and separate from the inner wall of the outer cylindrical screen and clogging prevention means capable of extruding clogged solids is provided. it can.

【0009】また、本発明は、前記凹溝を備えた目詰ま
り防止手段は、弾性体から形成され、前記凹溝の両側壁
部を内部に注入された流体圧により前記外筒スクリーン
の内壁に向けて接離可能に伸縮させ得るものとし、かつ
前記凹溝の底面内部に注入された流体圧により前記凹溝
が形成する凹空間を拡縮可能とし、目詰まり固形物を押
し出し可能としたものである形態のスクリュープレスに
具体化できる。さらには、前記凹溝内に洗浄水を導入可
能としたものである形態のスクリュープレスに具体化で
きる。
Further, in the present invention, the clogging prevention means having the concave groove is formed of an elastic body, and both side walls of the concave groove are formed on the inner wall of the outer cylindrical screen by fluid pressure injected inside. The concave space formed by the concave groove can be expanded and contracted by fluid pressure injected into the bottom surface of the concave groove so that clogged solids can be extruded. It can be embodied in a certain form of screw press. Furthermore, the present invention can be embodied in a screw press in which washing water can be introduced into the groove.

【0010】[0010]

【発明の実施の形態】次に、本発明のスクリュープレス
に係る実施形態について、図1〜3を参照しながら説明
する。先ず、本発明が適用されるスクリュープレスは、
外筒スクリーンとスクリュー軸を主要部品として構成さ
れる点は前述の従来のものと同様である。すなわち、図
1において、水分が通過できる孔径の無数のろ過孔を外
周面に有する筒状部材である外筒スクリーン11と、そ
の外筒スクリーン11の内部に駆動モータ15によって
回転可能に装着され、らせん状のスクリュー羽根14を
外周に立設した軸体13からなるスクリュー軸12とを
備えている。
Next, an embodiment of a screw press according to the present invention will be described with reference to FIGS. First, the screw press to which the present invention is applied,
It is the same as the above-mentioned conventional one in that the outer cylindrical screen and the screw shaft are configured as main parts. That is, in FIG. 1, an outer cylindrical screen 11 which is a cylindrical member having an infinite number of filtration holes having a hole diameter through which moisture can pass, and is rotatably mounted inside the outer cylindrical screen 11 by a drive motor 15, And a screw shaft 12 composed of a shaft 13 having spiral screw blades 14 erected on the outer periphery.

【0011】そしてこの構造において、外筒スクリーン
11の一方の端部に設けられた入口部17から送入され
た含水汚泥を前記スクリュー軸12を回転させることに
より他端方向に圧縮しながら移動させ、その水分を前記
外筒スクリーン11のろ過孔を通じて押し出して脱水す
るとともに、他端側の出口部16から脱水汚泥を排出す
るようにして脱水操作が行われるのである。
In this structure, the hydrous sludge fed from the inlet 17 provided at one end of the outer cylindrical screen 11 is moved while being compressed in the other end direction by rotating the screw shaft 12. The dewatering operation is performed by extruding the water through the filtration holes of the outer cylindrical screen 11 to dewater the water and discharging the dewatered sludge from the outlet 16 at the other end.

【0012】そして、本発明の特徴とするところは、前
記スクリュー羽根の先端14aに沿って、凹溝を前記外
筒スクリーン11の内壁に向けて接離可能に備えた目詰
まり防止手段を配設したところにあり、この目詰まり防
止手段としては、例えば図2に示すように、上部に凹溝
21を形成し得るゴム質のような弾性体からなる柔軟成
形体2であって、スクリュー羽根の先端14aに嵌め付
けられている。そして、その柔軟成形体2の凹溝21を
挟む上部先端22a、22aは、凹溝21の両側壁内部
流路22、22に注入された流体、例えば水の圧力によ
り前記外筒スクリーン11の内壁に向けて接離可能に伸
縮させ得るよう構成されている。
A feature of the present invention is that a clogging preventing means is provided along the tip end 14a of the screw blade so that a concave groove can be brought into contact with and separated from the inner wall of the outer cylindrical screen 11. The clogging preventing means is, for example, as shown in FIG. 2, a flexible molded body 2 made of an elastic material such as rubber capable of forming a concave groove 21 on an upper part thereof, It is fitted to the tip 14a. The upper ends 22 a, 22 a of the flexible molded body 2 sandwiching the concave groove 21 are formed on the inner wall of the outer cylindrical screen 11 by the pressure of the fluid, for example, water injected into the internal flow paths 22, 22 on both side walls of the concave groove 21. It is configured so that it can be extended and contracted so as to be able to approach and separate from.

【0013】さらに、図3に示すように、前記上部先端
22a、22aを伸長させ外筒スクリーン11の内壁に
接触させた状態で、前記凹溝21の底面内部流路23に
注入した流体の圧力を調節して、図3(A)に示すよう
に、前記凹溝21の底面24を下降させて、前記凹溝2
1が形成する空間を拡大したり、また図3(B)に示す
ように、前記底面24を上昇させて前記空間を縮小させ
たりできるようにした点にある。
Further, as shown in FIG. 3, the pressure of the fluid injected into the internal flow path 23 at the bottom of the groove 21 with the upper ends 22a, 22a extended and in contact with the inner wall of the outer cylindrical screen 11 is shown. 3A, the bottom surface 24 of the groove 21 is lowered, as shown in FIG.
3 is that the space formed by the space 1 can be enlarged, and as shown in FIG. 3B, the space can be reduced by raising the bottom surface 24.

【0014】かくして、本発明によれば、前記したよう
に柔軟成形体2と外筒スクリーン11の内壁との間にで
きる空間を拡縮できるので、外筒スクリーン11に設け
られているろ過孔を通じて排気、吸気作用を行えるの
で、洗浄水を使用することなく、目詰まりの原因となる
固形物を強制的に排除することができるのである。この
ようにして、本発明によってろ過孔の目詰まりを確実に
解消することができるのである。
Thus, according to the present invention, as described above, the space formed between the flexible molded body 2 and the inner wall of the outer cylindrical screen 11 can be enlarged or reduced, so that the exhaust air can be exhausted through the filtration holes provided in the outer cylindrical screen 11. In addition, since a suction operation can be performed, solid substances causing clogging can be forcibly removed without using cleaning water. Thus, according to the present invention, clogging of the filtration hole can be reliably eliminated.

【0015】また、本発明では、前記柔軟成形体2の凹
溝21には洗浄水が導入可能に構成しておけば、前記し
た柔軟成形体2と外筒スクリーン11の内壁との間にで
きる空間の拡縮作用によって、洗浄水によってさらに効
果的に目詰まり固形物を強制的に排除できるようになる
うえ、その洗浄水の使用量も最小に止めることが切る利
点が得られる。なお、前記した柔軟成形体2と外筒スク
リーン11の内壁との間にできる空間の拡縮に要する操
作用水、あるい前記の洗浄水の供給は、外部からスクリ
ュー軸12内部を通じて行うようにすればよい。
Further, in the present invention, if cleaning water can be introduced into the concave groove 21 of the flexible molded body 2, it can be formed between the flexible molded body 2 and the inner wall of the outer cylindrical screen 11. The expansion and contraction of the space provides the advantage that the clogged solids can be more effectively forcibly removed by the washing water, and the amount of the washing water used can be minimized. In addition, supply of the operation water required for expansion and contraction of the space formed between the flexible molded body 2 and the inner wall of the outer cylindrical screen 11 or the washing water may be performed from the outside through the screw shaft 12. Good.

【0016】[0016]

【発明の効果】本発明のスクリュープレスは、以上に説
明したように構成されているので、洗浄水を使用するこ
となく、または最小の使用量の洗浄水で外筒スクリーン
の目詰まりを確実に解消することが可能となり、従来の
ような外部に設けられる複雑で高価な洗浄水配管設備が
全く不要となるという優れた効果がある。よって本発明
は従来の問題点を解消したスクリュープレスとして、そ
の工業的価値は極めて大なるものがある。
The screw press of the present invention is constructed as described above, so that the outer cylinder screen can be reliably clogged without using washing water or with a minimum amount of washing water. This makes it possible to eliminate the need for a complicated and expensive washing water piping system provided outside as in the related art. Therefore, the present invention has a very large industrial value as a screw press which has solved the conventional problems.

【図面の簡単な説明】[Brief description of the drawings]

【図1】スクリュープレスを説明するための要部断面略
図。
FIG. 1 is a schematic cross-sectional view of a main part for describing a screw press.

【図2】本発明の実施形態の柔軟成形体の要部断面図。FIG. 2 is a sectional view of a main part of the flexible molded body according to the embodiment of the present invention.

【図3】本発明の柔軟成形体の動作を説明するための要
部断面図。
FIG. 3 is a sectional view of an essential part for explaining the operation of the flexible molded body of the present invention.

【符号の説明】[Explanation of symbols]

11 外筒スクリーン、12 スクリュー軸、13 軸
体、14 スクリュー羽根、14a スクリュー羽根の
先端、15 駆動モータ、16 出口部、17入口部、
2 柔軟成形体、21 凹溝、22 側壁内部流路、2
2a 上部先端、23 底面内部流路、24 底面。
11 outer cylindrical screen, 12 screw shaft, 13 shaft, 14 screw blade, 14a tip of screw blade, 15 drive motor, 16 outlet, 17 inlet,
2 Flexible molded body, 21 groove, 22 Side wall internal flow path, 2
2a Top tip, 23 bottom internal flow path, 24 bottom.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】外筒スクリーンとその外筒スクリーンの内
部に回転可能に装着され、らせん状スクリュー羽根を外
周に立設した内筒コーンとを備え、外筒スクリーンの一
端側入口部から送入された含水汚泥を前記内筒コーンを
回転させることにより他端方向に圧縮しながら移動さ
せ、その水分を前記外筒スクリーンを通じて押し出して
脱水するとともに、他端側出口部から脱水汚泥を排出す
るようにしたスクリュープレスにおいて、前記スクリュ
ー羽根の先端に沿って、凹溝を前記外筒スクリーンの内
壁に向けて接離可能に備え、目詰まり固形物を押し出し
可能としたた目詰まり防止手段を配設したことを特徴と
するスクリュープレス。
1. An outer cylindrical screen comprising: an outer cylindrical screen; and an inner cylindrical cone rotatably mounted inside the outer cylindrical screen, and having a spiral screw blade standing upright on an outer periphery thereof. The water-containing sludge is moved while being compressed in the other end direction by rotating the inner cylinder cone, and the moisture is pushed out through the outer cylinder screen to be dewatered, and the dewatered sludge is discharged from the other end side outlet. In the screw press, a clogging preventing means is provided along the tip of the screw blade so that a concave groove is provided so as to be capable of coming and going toward the inner wall of the outer cylindrical screen, so that clogged solids can be pushed out. A screw press characterized by:
【請求項2】前記凹溝を備えた目詰まり防止手段は、弾
性体から形成され、前記凹溝の両側壁部を内部に注入さ
れた流体圧により前記外筒スクリーンの内壁に向けて接
離可能に伸縮させ得るものとし、かつ前記凹溝の底面内
部に注入された流体圧により前記凹溝が形成する凹空間
を拡縮可能としたものである請求項1に記載のスクリュ
ープレス。
2. The clogging prevention means provided with the concave groove is formed of an elastic body, and both side walls of the concave groove are brought into contact with and separated from the inner wall of the outer cylindrical screen by a fluid pressure injected therein. The screw press according to claim 1, wherein the screw space can be expanded and contracted as much as possible, and a concave space formed by the groove can be expanded and contracted by a fluid pressure injected into a bottom surface of the groove.
【請求項3】前記凹溝内に洗浄水を導入可能としたもの
である請求項2に記載のスクリュープレス。
3. The screw press according to claim 2, wherein washing water can be introduced into said groove.
JP2000140366A 2000-05-12 2000-05-12 Screw press Withdrawn JP2001321990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000140366A JP2001321990A (en) 2000-05-12 2000-05-12 Screw press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000140366A JP2001321990A (en) 2000-05-12 2000-05-12 Screw press

Publications (1)

Publication Number Publication Date
JP2001321990A true JP2001321990A (en) 2001-11-20

Family

ID=18647676

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000140366A Withdrawn JP2001321990A (en) 2000-05-12 2000-05-12 Screw press

Country Status (1)

Country Link
JP (1) JP2001321990A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010029444A3 (en) * 2008-09-12 2010-11-04 Klass Georg Sen Screw filter press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010029444A3 (en) * 2008-09-12 2010-11-04 Klass Georg Sen Screw filter press

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