JP2011000607A - Multi-screw press - Google Patents

Multi-screw press Download PDF

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Publication number
JP2011000607A
JP2011000607A JP2009144792A JP2009144792A JP2011000607A JP 2011000607 A JP2011000607 A JP 2011000607A JP 2009144792 A JP2009144792 A JP 2009144792A JP 2009144792 A JP2009144792 A JP 2009144792A JP 2011000607 A JP2011000607 A JP 2011000607A
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Prior art keywords
screw
outer body
screen
screw shaft
cleaning
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Hiroyuki Matsui
寛幸 松井
Masaaki Hoshino
正明 星野
Taro Hatano
太郎 羽田野
Takashige Koreeda
卓成 是枝
Takeshi Ishida
健 石田
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Kubota Corp
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Kubota Corp
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    • 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
    • B30B9/16Presses 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 operating with two or more screws or worms

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Sludge (AREA)
  • Filtration Of Liquid (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a multi-screw press with a screen which is easily handled when assembled or maintained.SOLUTION: The multi-screw press include: a screw shaft 3; a screw blade 4 formed at the screw shaft; and the screen 2 forming a filter chamber around the screw blade. In the multi-screw press, the screen is formed by combining a plurality of outer barrel beams and a plurality of outer barrel members freely attachably/detachably, the plurality of the outer barrel beams elongate in the axial direction of the screw shaft and are also arranged at a plurality of position around the screw blade around the axial center of the screw shaft, the plurality of the outer barrel members are arranged along the axial direction of the screw shaft, and the upper edge and lower edge of the outer barrel members are each fixed to outer barrel beams freely attachably/detachably.

Description

本発明は多軸スクリュープレスに関し、例えば下水汚泥や工業廃水汚泥等の有機性汚泥を脱水する技術に係るものである。   The present invention relates to a multi-axis screw press and relates to a technique for dewatering organic sludge such as sewage sludge and industrial wastewater sludge.

従来の多軸スクリュープレスは、本体ケーシングの外周部がスクリーンをなし、本体ケーシングを軸心方向に挿通してスクリュー軸を配置し、スクリュー軸にスクリュー羽根を形成している。スクリュー羽根の径方向外側の先端縁にはスクレーパを設けており、スクレーパがスクリーンの内面に弾性的に接触している。スクリュー羽根は汚泥供給側から汚泥排出側へ行くほどにピッチが狭くなる形状をなし、あるいはスクリュー軸の軸径が汚泥排出側ほど太くなる形状をなす。   In the conventional multi-axis screw press, the outer peripheral portion of the main body casing forms a screen, the main body casing is inserted in the axial direction, the screw shaft is arranged, and screw blades are formed on the screw shaft. A scraper is provided at the tip edge on the radially outer side of the screw blade, and the scraper is in elastic contact with the inner surface of the screen. The screw blade has a shape in which the pitch becomes narrower as it goes from the sludge supply side to the sludge discharge side, or the shaft diameter of the screw shaft becomes thicker toward the sludge discharge side.

本体ケーシングの汚泥排出側には開口に対向して背圧板を配置しており、背圧板はシリンダー装置によって開口に向けて出退自在であり、開口に向けて作用させる圧力を調整することにより脱水力(圧搾力)を制御する。   A back pressure plate is arranged on the sludge discharge side of the main casing opposite to the opening, and the back pressure plate can be moved back and forth toward the opening by a cylinder device, and dehydration can be achieved by adjusting the pressure acting on the opening. Control the force (squeezing force).

本体ケーシングに投入した脱水対象汚泥は、スクリーンでろ過されながらスクリュー軸およびスクリュー羽根の回転によって汚泥排出側へ搬送される。この際に、スクリュー羽根のピッチが汚泥排出側ほど狭くなり、あるいはスクリュー軸の軸径が汚泥排出側ほど太くなることで、本体ケーシングにおけるスクリュー羽根の1ピッチ当たりのろ室容積が減少して行く。汚泥はろ室容積の減少による圧密力および背圧板による背圧の作用により脱水されて、汚泥排出側の開口から本体ケーシングの外部へ脱水汚泥(ケーキ)として排出される。   The dewatered sludge that has been put into the main casing is conveyed to the sludge discharge side by the rotation of the screw shaft and screw blades while being filtered by the screen. At this time, the pitch of the screw blades becomes narrower toward the sludge discharge side, or the shaft diameter of the screw shaft becomes thicker toward the sludge discharge side, so that the volume of the filter chamber per pitch of the screw blades in the main body casing decreases. . Sludge is dehydrated by the action of the compaction force due to the reduction of the filter chamber volume and the back pressure by the back pressure plate, and is discharged as dehydrated sludge (cake) from the opening on the sludge discharge side to the outside of the main casing.

スクリーンによるろ過処理においては、ろ過処理の経過とともにスクリーン内面に汚泥層が堆積してろ過抵抗を生じさせ、汚泥中の水分がスクリーン内面の汚泥層を通過するのに際して障害となる。このスクリーン内面の汚泥層が厚くなるほどにろ過抵抗は飛躍的に増加し、機内圧力を一定に維持して運転するとろ過水量が小さくなり、ケーキ含水率を低下させることが困難となる。   In the filtration process using a screen, a sludge layer accumulates on the inner surface of the screen with the progress of the filtration process to cause filtration resistance, which becomes an obstacle when moisture in the sludge passes through the sludge layer on the inner surface of the screen. As the sludge layer on the inner surface of the screen becomes thicker, the filtration resistance increases drastically. When operating with the internal pressure kept constant, the amount of filtrate becomes small and it becomes difficult to lower the moisture content of the cake.

このため、スクリュー羽根の回転に伴ってスクレーパでスクリーン内面をスクレーピングして汚泥層を剥離させており、スクレーピング頻度が多いほどにスクリーン内面の汚泥層の増加を抑制できる。スクレーピング頻度の増加はスクリュー羽根の回転速度を高めることで実現でき、単位時間当たりの汚泥処理量を一定に維持する運転条件下では、スクリュー羽根の羽根ピッチを小さくすることでスクリュー羽根の回転速度を高めることが可能となる。   For this reason, the sludge layer is peeled off by scraping the screen inner surface with a scraper as the screw blades rotate, and the increase in the sludge layer on the screen inner surface can be suppressed as the scraping frequency increases. Increasing the scraping frequency can be achieved by increasing the rotational speed of the screw blades. Under operating conditions that maintain a constant amount of sludge treatment per unit time, the rotational speed of the screw blades can be reduced by reducing the blade pitch of the screw blades. It becomes possible to raise.

スクリュー羽根を多条に設ける多軸スクリュープレスとしては、例えば特許文献1に記載するものがある。これは、濃縮用ケーシングの内部に一対の多条螺旋翼を水平方向に所定間隔で平行に配列したもので、双方の多条螺旋翼は自身の螺旋翼が相手の螺旋翼間に入り込むように配置しており、双方の多条螺旋翼が相互に逆方向へ回転する。   An example of a multi-axis screw press provided with multiple screw blades is disclosed in Patent Document 1. This is a pair of multi-spiral spiral blades arranged in parallel in the horizontal direction at a predetermined interval inside the casing for concentration so that both multi-spiral spiral blades enter between the spiral blades of their counterparts. It is arranged, and both multi-spiral spiral wings rotate in opposite directions.

また、特許文献2に記載するものは、スクリーン篭の内部に一対のアルキメデス・スクリューを水平方向に所定間隔で平行に配列してあり、各アルキメデス・スクリューは主ネジ山の間に主ネジ山よりも高さの低い補助ネジ山を設けてある。一対のアルキメデス・スクリューは一方のアルキメデス・スクリューの補助ネジ山が他方のアルキメデス・スクリューの主ネジ山の近くに位置するように配置してある。   Further, in Patent Document 2, a pair of Archimedes screws are arranged in parallel at a predetermined interval in the horizontal direction inside the screen cage, and each Archimedes screw is between the main threads and between the main threads. There is also a low auxiliary thread. The pair of Archimedes screws are arranged so that the auxiliary thread of one Archimedes screw is located near the main thread of the other Archimedes screw.

また、特許文献3に記載するものは、スクリュープレスの洗浄装置に係るものであり、ろ過筒の周囲にノズル管を配置し、ノズル管に複数の洗浄用ノズルを装着したものであり、複数の洗浄用ノズルはスクリュープレスのろ過筒の外周面からほぼ等しい距離に配置している。このノズル管はろ過筒とは別途の構成部材上に設けた走行用レールの上を走行用ローラーによりスクリュー軸の前後端間で移動可能に設けている。   Moreover, what is described in Patent Document 3 relates to a screw press cleaning device, in which a nozzle tube is arranged around a filtration cylinder, and a plurality of cleaning nozzles are mounted on the nozzle tube. The cleaning nozzle is arranged at an approximately equal distance from the outer peripheral surface of the filter cylinder of the screw press. The nozzle tube is provided on a traveling rail provided on a component separate from the filtration cylinder so as to be movable between the front and rear ends of the screw shaft by a traveling roller.

特公昭61−37031号公報Japanese Examined Patent Publication No. 61-37031 特開平9−273066号公報Japanese Patent Laid-Open No. 9-273066 実開昭61−127893号公報Japanese Utility Model Publication No. 61-127893

ところで、従来の多軸スクリュープレスは、本体ケーシングがスクリュー軸の軸心方向に沿って二分割した構造をなし、各分割部は相互間の合わせ面を形成する側部フランジと取り付け用の端部フランジとスクリーンをなす外胴と補強用のリブとが一体となったものである。側部フランジはスクリュー軸の軸心方向と平行をなして各分割部の両側に配置するもので、本体ケーシングの全長にわたって延在している。端部フランジはスクリュー軸の軸心方向で本体ケーシングの両端に配置したもので、多軸スクリュープレスの本体フレームに接合する。外胴はパンチングメタル等からなり、両端部フランジ間にわたって延在している。補強用のリブは外胴の外側面に配置する縦リブと横リブからなり、横リブをスクリュー軸の軸心方向に所定間隔で配置し、横リブ間に縦リブを配置している。   By the way, the conventional multi-axis screw press has a structure in which the main body casing is divided into two along the axial direction of the screw shaft, and each divided portion has a side flange and a mounting end portion that form a mating surface between them. The outer cylinder forming the flange and the screen and the reinforcing rib are integrated. The side flanges are arranged on both sides of each divided portion in parallel with the axial direction of the screw shaft, and extend over the entire length of the main body casing. The end flanges are arranged at both ends of the main body casing in the axial direction of the screw shaft, and are joined to the main body frame of the multi-axis screw press. The outer cylinder is made of a punching metal or the like and extends between the flanges at both ends. The reinforcing rib includes a vertical rib and a horizontal rib arranged on the outer surface of the outer body. The horizontal rib is arranged at a predetermined interval in the axial direction of the screw shaft, and the vertical rib is arranged between the horizontal ribs.

しかしながら、各分割部は側部フランジと端部フランジと外胴と補強用のリブとを一体化してスクリュー軸の軸心方向に長尺な形状をなすために、組立て時やメンテナンス時には分割部の全体を一つの部材として取り扱う必要があり、その重量および大きさの点から取り扱いが困難であった。   However, each split part integrates the side flange, end flange, outer shell, and reinforcing rib to form a long shape in the axial direction of the screw shaft. It was necessary to handle the whole as one member, and it was difficult to handle in terms of its weight and size.

また、従来においては、ノズル管はろ過筒とは別途の構成部材上に設けた走行用レールの上を走行用ローラーにより移動する構造であるので、ノズル管を移動させるための専用部材として走行用レールを必要とし、部品点数が多くなる問題があった。   Further, since the nozzle tube is conventionally structured to move on a traveling rail provided on a component separate from the filter cylinder by a traveling roller, it is used as a dedicated member for moving the nozzle tube. There was a problem that a rail was required and the number of parts increased.

本発明は上記した課題を解決するものであり、組立て時やメンテナンス時における取り扱いが容易なスクリーンを備えた多軸スクリュープレスを提供することを目的とする。   The present invention solves the above-described problems, and an object thereof is to provide a multi-axis screw press provided with a screen that can be easily handled during assembly and maintenance.

上記課題を解決するために、本発明の多軸スクリュープレスは、スクリュー軸と、スクリュー軸に形成するスクリュー羽根と、スクリュー羽根の周囲にろ室を形成するスクリーンを備え、スクリーンが複数の外胴梁と複数の外胴部材を着脱可能に組み合わせてなり、複数の外胴梁はスクリュー軸の軸心方向に延在し、かつスクリュー軸の軸心廻りでスクリュー羽根の周囲の複数箇所に配置し、複数の外胴部材はスクリュー軸の軸心方向に沿って配列し、上縁と下縁のそれぞれを外胴梁に着脱可能に固定したことを特徴とする。   In order to solve the above problems, a multi-axis screw press according to the present invention includes a screw shaft, screw blades formed on the screw shaft, and a screen forming a filter chamber around the screw blades, and the screen has a plurality of outer cylinders. A beam and a plurality of outer body members are detachably combined. The plurality of outer body beams extend in the axial direction of the screw shaft, and are arranged at a plurality of locations around the screw blade around the axis of the screw shaft. The plurality of outer body members are arranged along the axial direction of the screw shaft, and each of the upper edge and the lower edge is detachably fixed to the outer body beam.

また、本発明の多軸スクリュープレスにおいて、スクリーンは複数の外胴押さえを備え、複数の外胴押さえは外胴部材の外側面に当接してスクリュー軸の軸心方向に沿って配列し、上端部と下端部のそれぞれを外胴梁に着脱可能に固定したことを特徴とする。   Further, in the multi-axis screw press of the present invention, the screen includes a plurality of outer body holders, and the plurality of outer body holders are arranged along the axial direction of the screw shaft in contact with the outer surface of the outer body member, Each of the part and the lower end part is detachably fixed to the outer body beam.

また、本発明の多軸スクリュープレスにおいて、スクリーンを軸心廻りに囲んで配置する洗浄管と、洗浄管に洗浄水を供給する洗浄水供給手段と、洗浄管に接続して外胴部材の外側面に向けて洗浄水を噴射する複数のノズルと、洗浄管を支持し、ガイドレールをなす外胴梁に沿って移動可能な搬送部からなる洗浄装置を備えることを特徴とする。   Further, in the multi-axis screw press according to the present invention, a cleaning pipe that surrounds the screen around the shaft center, cleaning water supply means that supplies cleaning water to the cleaning pipe, and an outer shell member connected to the cleaning pipe. A cleaning device includes a plurality of nozzles that spray cleaning water toward the side surface, and a transport device that supports the cleaning pipe and is movable along an outer trunk beam that forms a guide rail.

本発明では、スクリーンが複数の外胴梁と複数の外胴部材と複数の外胴押さえを着脱可能に組み合わせてなり、外胴梁と外胴部材と外胴押さえに分解可能であるので、多軸スクリュープレスの製作時およびメンテナンス時には個々の軽量な部品として取り扱うことが可能となり、作業性の向上を図ることができる。また、洗浄装置がスクリーンの外胴梁をガイドレールとして兼用し、最上位の外胴梁上を移動することで、部品点数の削減を図ることができ、メンテナンスが容易となる。   In the present invention, the screen is configured by detachably combining a plurality of outer body beams, a plurality of outer body members, and a plurality of outer body holders, and can be disassembled into an outer body beam, an outer body member, and an outer body holder. At the time of manufacturing and maintenance of the axial screw press, it can be handled as individual lightweight parts, and workability can be improved. In addition, the cleaning device also uses the outer shell beam of the screen as a guide rail and moves on the uppermost outer beam so that the number of parts can be reduced and maintenance is facilitated.

本発明の実施の形態における多軸スクリュープレスを示す一部破断正面図The partially broken front view which shows the multi-axis screw press in embodiment of this invention 同実施の形態における多条スクリュー羽根を示す正面図Front view showing a multi-thread screw blade in the same embodiment 同実施の形態におけるスクレーパを示す要部拡大図The principal part enlarged view which shows the scraper in the embodiment 同実施の形態における多軸スクリュープレスを示す断面図Sectional drawing which shows the multi-axis screw press in the same embodiment 同実施の形態における多軸スクリュープレスの要部断面図Sectional drawing of the principal part of the multi-axis screw press in the same embodiment 同実施の形態におけるスクリーンの要部断面図Sectional drawing of the principal part of the screen in the same embodiment 同実施の形態におけるスクリーンの外胴押さえの取り付け構造を示す要部拡大図The principal part enlarged view which shows the attachment structure of the outer body presser of the screen in the embodiment 同実施の形態におけるスクリーンの外胴部材の一部拡大図Partial enlargement of the outer body member of the screen in the same embodiment 同実施の形態におけるスクリーンの外胴部材の側面図Side view of outer body member of screen in the same embodiment 本発明の他の実施の形態におけるスクリーンの外胴押さえの取り付け構造を示す要部断面図Sectional drawing which shows the principal part which shows the attachment structure of the outer body retainer of the screen in other embodiment of this invention 本発明の他の実施の形態におけるスクリーンの要部断面図Sectional drawing of the principal part of the screen in other embodiment of this invention

以下、本発明の実施の形態を図面に基づいて説明する。図1乃至図9において、本実施の形態に係る多軸スクリュープレスの基本的な構成は概略的に以下のものである。
汚泥脱水機としての多軸スクリュープレスは、本体1によりスクリーン2を支持している。スクリーン2は内部にろ室を形成しており、ろ室には軸心方向に挿通して多数のスクリュー軸3、およびスクリュー軸3の軸心廻りに形成した多条のスクリュー羽根4を挿通し、本体1の汚泥排出側にはスクリーン2の開口に対向して背圧板5を配置している。本実施の形態では一対のスクリュー軸3のそれぞれに単条のスクリュー羽根4を設けた構成を開示するが、本発明においてスクリュー軸3の数およびスクリュー羽根4の条数は任意に設けることができる。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 9, the basic configuration of the multi-axis screw press according to the present embodiment is schematically as follows.
A multi-axis screw press as a sludge dehydrator supports a screen 2 by a main body 1. The screen 2 has a filter chamber formed therein. The filter chamber is inserted in the axial direction with a number of screw shafts 3 and a plurality of screw blades 4 formed around the axis of the screw shaft 3. The back pressure plate 5 is disposed on the sludge discharge side of the main body 1 so as to face the opening of the screen 2. In the present embodiment, a configuration in which a single screw blade 4 is provided on each of a pair of screw shafts 3 is disclosed, but in the present invention, the number of screw shafts 3 and the number of screw blades 4 can be arbitrarily provided. .

スクリーン2は、複数の外胴梁21と複数の外胴部材22と複数の外胴押さえ23と供給側外胴24と排出側外胴25を着脱可能に組み合わせてなる。複数の外胴梁21はスクリュー軸3の軸心方向と平行をなしてスクリーン2の全長にわたって供給側外胴24と排出側外胴25の間に延在し、かつスクリュー軸3の軸心廻りでスクリュー羽根4の周囲の複数箇所に配置しており、本実施の形態ではスクリーン2の頂部に配置する上位外胴梁211とスクリーン2の底部に配置する下位外胴梁212と上下方向においてスクリーン2の中間位置に配置する中間外胴梁213、213からなる。   The screen 2 is formed by detachably combining a plurality of outer body beams 21, a plurality of outer body members 22, a plurality of outer body holders 23, a supply side outer cylinder 24, and a discharge side outer cylinder 25. The plurality of outer body beams 21 extend between the supply-side outer cylinder 24 and the discharge-side outer cylinder 25 over the entire length of the screen 2 in parallel with the axial direction of the screw shaft 3, and around the axis of the screw shaft 3. The upper outer girder beam 211 arranged at the top of the screen 2 and the lower outer girder beam 212 arranged at the bottom of the screen 2 and the screen in the vertical direction in this embodiment. It consists of intermediate outer trunk beams 213 and 213 arranged at the intermediate position of 2.

各外胴部材22は、スクリーン2の外胴を軸心方向で複数に分割し、かつ上下に分割したセグメントをなすものであり、複数の外胴部材22をスクリュー軸3の軸心方向に沿って供給側外胴24と排出側外胴25の間に配列することで全体として外胴を形成している。ここでは外胴部材22がパンチングメタルからなるが、ウェッジワイヤ等の種々の形態のろ材を適用することも可能である。   Each outer body member 22 divides the outer body of the screen 2 into a plurality of parts in the axial direction and forms a segment divided vertically, and the plurality of outer body members 22 are arranged along the axial direction of the screw shaft 3. The outer cylinder is formed as a whole by arranging between the supply-side outer cylinder 24 and the discharge-side outer cylinder 25. Here, the outer body member 22 is made of a punching metal, but various forms of filter media such as wedge wires can also be applied.

各外胴部材22は上縁と下縁のそれぞれを外胴梁21に接合手段をなすボルト221により着脱可能に固定しており、ここではろ室上部を形成する外胴部材22を上位外胴梁211と中間外胴梁213とに固定し、ろ室下部を形成する外胴部材22を下位外胴梁212と中間外胴梁213とに固定している。   Each outer body member 22 is detachably fixed at its upper and lower edges by bolts 221 that form a joining means to the outer body beam 21. Here, the outer body member 22 forming the upper part of the filter chamber is attached to the upper body member. The outer body member 22 forming the lower portion of the filter chamber is fixed to the lower outer body beam 212 and the intermediate outer body beam 213.

複数の外胴押さえ23はスクリュー軸3の軸心方向に沿って所定間隔で配列してあり、各外胴押さえ23をスクリーン2の上下方向に沿って配置している。各外胴押さえ23はそれぞれが内側縁で外胴部材22の外側面に当接しており、上端部と下端部をそれぞれ上位外胴梁211と下位外胴梁212に着脱可能に固定している。詳しくは、外胴押さえ23の端部に形成した穴231に押さえ金具232を挿通し、押さえ金具232の両側をボルト233で上位外胴梁211と下位外胴梁212に固定している。供給側外胴24と排出側外胴25はスクリーン2の端部を形成している。   The plurality of outer cylinder holders 23 are arranged at predetermined intervals along the axial direction of the screw shaft 3, and the outer cylinder holders 23 are arranged along the vertical direction of the screen 2. Each outer body retainer 23 is in contact with the outer surface of the outer body member 22 at the inner edge, and the upper end and the lower end are detachably fixed to the upper outer body beam 211 and the lower outer body beam 212, respectively. . Specifically, a holding metal fitting 232 is inserted into a hole 231 formed at an end portion of the outer body holding member 23, and both sides of the holding metal fitting 232 are fixed to the upper outer body beam 211 and the lower outer body beam 212 with bolts 233. The supply-side outer cylinder 24 and the discharge-side outer cylinder 25 form the end of the screen 2.

図10に示すように、外胴押さえ23は上部および下部に2分割し、スクリーン2の周囲に4つの外胴押さえ23を配置することも可能である。この場合に、上部の外胴押さえ23は上位外胴梁211と中間外胴梁213に固定し、下部の外胴押さえ23は中間外胴梁213と下位外胴梁212に固定する。   As shown in FIG. 10, the outer body retainer 23 can be divided into an upper part and a lower part, and four outer body retainers 23 can be arranged around the screen 2. In this case, the upper outer trunk holder 23 is fixed to the upper outer trunk beam 211 and the intermediate outer trunk beam 213, and the lower outer trunk holder 23 is fixed to the intermediate outer trunk beam 213 and the lower outer trunk beam 212.

この構成によれば、多軸型の場合でも外胴押さえの形状を単純化することができ、コストダウンを図れる。
複数のスクリュー軸3は実質的に平行に、かつ上下方向の位置を異ならせて配置しており、本実施の形態ではスクリーン2のろ室上部に配置する上位のスクリュー軸31と、スクリーン2のろ室下部に配置する下位のスクリュー軸32からなる。
According to this configuration, the shape of the outer body retainer can be simplified even in the case of a multi-axis type, and the cost can be reduced.
The plurality of screw shafts 3 are arranged substantially in parallel and at different positions in the vertical direction. In the present embodiment, the upper screw shaft 31 disposed in the upper part of the filter chamber of the screen 2 and the screen 2 It consists of a lower screw shaft 32 arranged at the lower part of the filter chamber.

上位のスクリュー軸31に形成した上位のスクリュー羽根41、および下位のスクリュー軸32に形成した下位のスクリュー羽根42はそれぞれ2条の螺旋形状をなし、各羽根の径方向外側の先端縁には合成ゴム等の弾性材からなるスクレーパ6がボルト601およびナット602で固定してあり、スクレーパ6がスクリーン2の内面に摺接する。   The upper screw blades 41 formed on the upper screw shaft 31 and the lower screw blades 42 formed on the lower screw shaft 32 each have two spiral shapes, and are combined at the radially outer tip edge of each blade. A scraper 6 made of an elastic material such as rubber is fixed with bolts 601 and nuts 602, and the scraper 6 is in sliding contact with the inner surface of the screen 2.

上位のスクリュー羽根41および下位のスクリュー羽根42は、羽根のピッチが汚泥排出側ほど狭くなっており、羽根の1ピッチ当たりのろ室容積が減少して行く。あるいはスクリュー軸31、32の軸径を汚泥排出側ほど太くすることでスクリュー羽根の1ピッチ当たりのろ室容積を減少させることも可能である。   In the upper screw blade 41 and the lower screw blade 42, the blade pitch becomes narrower toward the sludge discharge side, and the volume of the filter chamber per pitch of the blade decreases. Alternatively, the volume of the filter chamber per pitch of the screw blades can be reduced by increasing the shaft diameters of the screw shafts 31 and 32 toward the sludge discharge side.

スクリーン2の汚泥供給側において上位のスクリュー軸31および下位のスクリュー軸32の一端には従動ギア312、322が装着してあり、従動ギア312、322は相互に噛合している。本体1にはモータ101および駆動ギア102を設けており、駆動ギア102が下位のスクリュー軸32の従動ギア322に噛合している。   On the sludge supply side of the screen 2, driven gears 312 and 322 are attached to one end of the upper screw shaft 31 and the lower screw shaft 32, and the driven gears 312 and 322 are meshed with each other. The main body 1 is provided with a motor 101 and a drive gear 102, and the drive gear 102 meshes with the driven gear 322 of the lower screw shaft 32.

スクリーン2の周囲には洗浄装置7を設けている。洗浄装置7は洗浄管71と洗浄水供給手段をなす洗浄水供給系72と複数のノズル73と搬送部74からなる。洗浄管71はスクリーン2を軸心廻りに囲み、かつ外胴部材22との間に所定の間隙を隔てた位置に配置してあり、スクリーン2の軸心方向へ移動可能である。洗浄水供給系72は洗浄管71に洗浄水を供給するフレキシブルな管路721およびポンプ等の給水源(図示省略)からなる。複数のノズル73は洗浄管71に接続して外胴部材22の外側面に向けて洗浄水を噴射するものであり、所定間隔で洗浄管71に装着してある。搬送部74は洗浄管71の上端内側部および下端内側部に固定してあり、上位外胴梁211および下位外胴梁212に嵌合する形状をなし、上位外胴梁211および下位外胴梁212をガイドレールとして移動するものである。   A cleaning device 7 is provided around the screen 2. The cleaning device 7 includes a cleaning pipe 71, a cleaning water supply system 72 that forms cleaning water supply means, a plurality of nozzles 73, and a transport unit 74. The cleaning tube 71 surrounds the screen 2 around the axis and is disposed at a predetermined gap from the outer body member 22, and is movable in the axial direction of the screen 2. The cleaning water supply system 72 includes a flexible pipe 721 for supplying cleaning water to the cleaning pipe 71 and a water supply source (not shown) such as a pump. The plurality of nozzles 73 are connected to the cleaning pipe 71 and inject cleaning water toward the outer surface of the outer body member 22 and are attached to the cleaning pipe 71 at predetermined intervals. The transport unit 74 is fixed to the upper inner side and lower inner side of the cleaning pipe 71 and has a shape that fits the upper outer beam 211 and the lower outer beam 212, and the upper outer beam 211 and the lower outer beam. 212 is used as a guide rail.

上記した構成における作用を説明する。多軸スクリュープレスの製作時およびメンテナンス時においては、スクリーン2が複数の外胴梁21と複数の外胴部材22と複数の外胴押さえ23を着脱可能に組み合わせてなり、外胴梁21と外胴部材22と外胴押さえ23に分解可能であるので、個々の軽量な部品として取り扱うことが可能となり、作業性の向上を図ることができる。   The operation of the above configuration will be described. At the time of production and maintenance of the multi-axis screw press, the screen 2 is configured by detachably combining a plurality of outer body beams 21, a plurality of outer body members 22, and a plurality of outer body holders 23. Since it can be disassembled into the body member 22 and the outer body holder 23, it can be handled as individual lightweight parts, and workability can be improved.

運転時には、モータ101による駆動ギア102の回転により、駆動ギア102に噛合する下位のスクリュー軸32の従動ギア322および上位のスクリュー軸31の従動ギア312を駆動し、上位のスクリュー羽根41および下位のスクリュー羽根42を相互に逆方向に回転させる。   During operation, the rotation of the drive gear 102 by the motor 101 drives the driven gear 322 of the lower screw shaft 32 and the driven gear 312 of the upper screw shaft 31 that mesh with the drive gear 102 to drive the upper screw blade 41 and the lower screw blade 41. The screw blades 42 are rotated in opposite directions.

汚泥供給側からスクリーン2の内部に投入した脱水対象汚泥は、スクリーン2でろ過されながら上位、下位のスクリュー軸31、32および上位、下位のスクリュー羽根41、42の回転によって汚泥排出側へ搬送される。   The sludge to be dehydrated that is introduced into the screen 2 from the sludge supply side is conveyed to the sludge discharge side by the rotation of the upper and lower screw shafts 31 and 32 and the upper and lower screw blades 41 and 42 while being filtered by the screen 2. The

この際に、スクリュー羽根41、42の各羽根のピッチが汚泥排出側ほど狭くなり、各羽根の1ピッチ当たりのろ室容積が減少して行く。汚泥はろ室容積の減少による圧密力および背圧板5による背圧の作用により脱水され、汚泥排出側の開口からスクリーン2の外部へ排出される。この運転時には、スクリュー羽根41、42がスクレーパ6を有することで、スクリュー軸31、32が一回転する間に複数のスクレーパ6がスクリーン内面の同一箇所を通過し、各スクレーパ6でスクリーン内面をスクレーピングして汚泥層を剥離させる。   At this time, the pitch of each blade of the screw blades 41 and 42 becomes narrower toward the sludge discharge side, and the volume of the filtration chamber per pitch of each blade decreases. The sludge is dehydrated by the action of the compaction force due to the reduction of the filter chamber volume and the back pressure by the back pressure plate 5 and is discharged to the outside of the screen 2 through the opening on the sludge discharge side. During this operation, the screw blades 41, 42 have the scraper 6, so that the plurality of scrapers 6 pass through the same portion of the screen inner surface while the screw shafts 31, 32 make one rotation, and the scraper 6 scrapes the screen inner surface. Then, the sludge layer is peeled off.

また、定期的にあるいは必要に応じて洗浄装置7を操作する。この際にスクリーン2の上位外胴梁211および下位外胴梁212がガイドレールとして機能する。つまり洗浄装置7は搬送部74がスクリーン2の上位外胴梁211および下位外胴梁212に沿って移動することで、洗浄管71がスクリーン2の軸心に沿って移動する。そして、洗浄装置7は洗浄水供給系72から洗浄管71に供給する洗浄水をノズル73から外胴部材22に向けて噴射し、スクリーン2の外側面の汚泥を洗い流す。このように、洗浄装置7がスクリーン2の上位外胴梁211および下位外胴梁212をガイドレールとして兼用し、上位外胴梁211および下位外胴梁212に沿って移動することで、部品点数の削減を図ることができ、メンテナンスが容易となる。   Further, the cleaning device 7 is operated periodically or as necessary. At this time, the upper outer girder beam 211 and the lower outer girder beam 212 of the screen 2 function as guide rails. That is, in the cleaning device 7, the cleaning unit 71 moves along the axis of the screen 2 by the conveyance unit 74 moving along the upper outer beam 211 and the lower outer beam 212 of the screen 2. The cleaning device 7 then sprays the cleaning water supplied from the cleaning water supply system 72 to the cleaning pipe 71 from the nozzle 73 toward the outer body member 22 to wash away the sludge on the outer surface of the screen 2. As described above, the cleaning device 7 also uses the upper outer torsion beam 211 and the lower outer torsion beam 212 of the screen 2 as guide rails, and moves along the upper outer torso beam 211 and the lower outer torsion beam 212, so that the number of parts is increased. Can be reduced, and maintenance becomes easy.

また、上位外胴梁211および下位外胴梁212は、補強部材やガイドのための摺動部材を有するものであっても良い。例えば、図11に示すように、上位外胴梁211および下位外胴梁212に断面コ字状の補強部材75を溶接固定して上位外胴梁211および下位外胴梁212の強度を増加させるとともに、補強部材75の両辺縁75a、75bをガイドレールとして兼用することも可能であり、この場合には補強部材75の両辺縁75a、75b上を摺動する洗浄装置シュー76を洗浄管71に設ける。   Further, the upper outer beam 211 and the lower outer beam 212 may have reinforcing members and sliding members for guides. For example, as shown in FIG. 11, the upper outer girder beam 211 and the lower outer girder beam 212 are welded and fixed to the upper outer girder beam 211 and the lower outer girder beam 212 to increase the strength of the upper outer girder beam 211 and the lower outer girder beam 212. At the same time, both side edges 75a and 75b of the reinforcing member 75 can be used as guide rails. In this case, a cleaning device shoe 76 that slides on both side edges 75a and 75b of the reinforcing member 75 is used as the cleaning pipe 71. Provide.

1 本体
2 スクリーン
3 スクリュー軸
4 スクリュー羽根
5 背圧板
6 スクレーパ
7 洗浄装置
21 外胴梁
22 外胴部材
23 外胴押さえ
24 供給側外胴
25 排出側外胴
31 上位のスクリュー軸
32 下位のスクリュー軸
41 上位のスクリュー羽根
42 下位のスクリュー羽根
71 洗浄管
72 洗浄水供給系
73 ノズル
74 搬送部
75 補強部材
75a、75b 辺縁
76 洗浄装置シュー
101 モータ
102 駆動ギア
211 上位外胴梁
212 下位外胴梁
213 中間外胴梁
221 ボルト
231 穴
232 押さえ金具
233 ボルト
312、322 従動ギア
601 ボルト
602 ナット
721 フレキシブルな管路
DESCRIPTION OF SYMBOLS 1 Main body 2 Screen 3 Screw shaft 4 Screw blade 5 Back pressure plate 6 Scraper 7 Cleaning device 21 Outer body beam 22 Outer body member 23 Outer body presser 24 Supply side outer body 25 Discharge side outer body 31 Upper screw shaft 32 Lower screw shaft 41 Upper screw blade 42 Lower screw blade 71 Cleaning pipe 72 Cleaning water supply system 73 Nozzle 74 Conveying section 75 Reinforcing member 75a, 75b Edge 76 Cleaning device shoe 101 Motor 102 Drive gear 211 Upper outer body beam 212 Lower outer body beam 213 Intermediate outer beam 221 Bolt 231 Hole 232 Press fitting 233 Bolt 312, 322 Driven gear 601 Bolt 602 Nut 721 Flexible pipe

Claims (3)

スクリュー軸と、スクリュー軸に形成するスクリュー羽根と、スクリュー羽根の周囲にろ室を形成するスクリーンを備え、スクリーンが複数の外胴梁と複数の外胴部材を着脱可能に組み合わせてなり、複数の外胴梁はスクリュー軸の軸心方向に延在し、かつスクリュー軸の軸心廻りでスクリュー羽根の周囲の複数箇所に配置し、複数の外胴部材はスクリュー軸の軸心方向に沿って配列し、上縁と下縁のそれぞれを外胴梁に着脱可能に固定したことを特徴とする多軸スクリュープレス。   A screw shaft, a screw blade formed on the screw shaft, and a screen that forms a filter chamber around the screw blade; the screen is configured by detachably combining a plurality of outer body beams and a plurality of outer body members; The outer body beam extends in the axial direction of the screw shaft, and is arranged at multiple locations around the screw blade around the axial center of the screw shaft, and the plurality of outer body members are arranged along the axial direction of the screw shaft. A multi-axis screw press characterized in that each of the upper edge and the lower edge is detachably fixed to the outer body beam. スクリーンは複数の外胴押さえを備え、複数の外胴押さえは外胴部材の外側面に当接してスクリュー軸の軸心方向に沿って配列し、上端部と下端部のそれぞれを外胴梁に着脱可能に固定したことを特徴とする請求項1に記載の多軸スクリュープレス。   The screen includes a plurality of outer body retainers, the plurality of outer body retainers abut against the outer surface of the outer body member and are arranged along the axial direction of the screw shaft, and each of the upper end portion and the lower end portion serves as an outer body beam. The multiaxial screw press according to claim 1, wherein the multiaxial screw press is detachably fixed. スクリーンを軸心廻りに囲んで配置する洗浄管と、洗浄管に洗浄水を供給する洗浄水供給手段と、洗浄管に接続して外胴部材の外側面に向けて洗浄水を噴射する複数のノズルと、洗浄管を支持し、ガイドレールをなす外胴梁に沿って移動可能な搬送部からなる洗浄装置を備えることを特徴とする請求項1または2に記載の多軸スクリュープレス。   A cleaning pipe that is disposed around the shaft, a cleaning water supply means that supplies cleaning water to the cleaning pipe, and a plurality of jets that are connected to the cleaning pipe and spray the cleaning water toward the outer surface of the outer body member. The multi-axis screw press according to claim 1 or 2, further comprising a cleaning device including a nozzle and a transport unit that supports the cleaning tube and is movable along an outer body beam forming a guide rail.
JP2009144792A 2009-06-18 2009-06-18 Multi-screw press Pending JP2011000607A (en)

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Publication number Priority date Publication date Assignee Title
JP2014193437A (en) * 2013-03-29 2014-10-09 Kubota Corp Sludge dehydration machine
CN106316016A (en) * 2015-09-30 2017-01-11 无锡威胜环保设备制造有限公司 Sludge water filter bed
WO2017211369A1 (en) * 2016-06-07 2017-12-14 Gea Process Engineering A/S Screw press apparatus including an improved cip arrangement and method of cleaning the apparatus
CN115449565A (en) * 2022-09-21 2022-12-09 西安宝鑫自动化设备有限公司 Beet sugaring juicing device

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JPH0565494U (en) * 1992-02-13 1993-08-31 雪印乳業株式会社 Cleaning device for screw press type dehydrator
JPH0570786U (en) * 1992-02-24 1993-09-24 丸井工業株式会社 Screw dehydrator
JPH06190594A (en) * 1992-12-22 1994-07-12 Kagome Co Ltd Biaxial different direction rotary type extruder for squeezing juice

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JPS50106771U (en) * 1973-12-29 1975-09-02
JPS51114497U (en) * 1975-03-12 1976-09-17
JPH03116294U (en) * 1990-03-12 1991-12-02
JPH0565494U (en) * 1992-02-13 1993-08-31 雪印乳業株式会社 Cleaning device for screw press type dehydrator
JPH0570786U (en) * 1992-02-24 1993-09-24 丸井工業株式会社 Screw dehydrator
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014193437A (en) * 2013-03-29 2014-10-09 Kubota Corp Sludge dehydration machine
CN106316016A (en) * 2015-09-30 2017-01-11 无锡威胜环保设备制造有限公司 Sludge water filter bed
WO2017211369A1 (en) * 2016-06-07 2017-12-14 Gea Process Engineering A/S Screw press apparatus including an improved cip arrangement and method of cleaning the apparatus
WO2017211363A1 (en) * 2016-06-07 2017-12-14 Gea Process Engineering A/S Screw press apparatus including an improved cip arrangement and method of cleaning the apparatus
US10850465B2 (en) 2016-06-07 2020-12-01 Gea Process Engineering A/S Screw press apparatus including an improved CIP arrangement and method of cleaning the apparatus
CN115449565A (en) * 2022-09-21 2022-12-09 西安宝鑫自动化设备有限公司 Beet sugaring juicing device

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