JP2006334449A

JP2006334449A - Scum skimmer

Info

Publication number: JP2006334449A
Application number: JP2005158305A
Authority: JP
Inventors: Takeshi Suzuki; 鈴木　　剛; Susumu Ogawa; 進小川; Ichiro Hashimoto; 一郎橋本
Original assignee: Tatsumi Kogyo KK; Tsurumi Manufacturing Co Ltd
Current assignee: Tatsumi Kogyo KK; Tsurumi Manufacturing Co Ltd
Priority date: 2005-05-31
Filing date: 2005-05-31
Publication date: 2006-12-14
Anticipated expiration: 2025-05-31
Also published as: JP4522319B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scum skimmer which collects and removes floating scum efficiently without decreasing a surface velocity in a treatment tank, and prevents formation of a dead water region, and causes no deterioration in water treatment efficiency. <P>SOLUTION: A horizontally moving guide rail 2 is attached to the aerial part of a water passage in a sewage treatment tank 1. A guide 5 installed on a suction cover 4 covering the outer periphery of a submerged agitator 3 below the guide rail 2 engages the submerged agitator 3 with the guide rail 2. The upstream side leading upper edge part of the suction cover 4 is notched to form a divergent suction port 6. A float 7 for floating the submerged agitator 3 is installed on the outer periphery of the suction cover 4. The submerged agitator 3 is moored by a mooring instrument 9 attached to the guide 5. A rudder plate is vertically installed at the end part of a discharge port 7 so as to be horizontally rotatable. An extendable structure for applying invert rotation force is attached to the rudder plate. The submerged agitator 3 is self-propelled in the horizontal direction by switching operation of a steering lever connected to the tip end of the rudder plate. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、汚水処理水槽、例えばオキシデーションディッチ槽内における水面に発生する発泡スカムを水中攪拌機を用いて除去する装置に関するものである。 The present invention relates to an apparatus for removing foam scum generated on a water surface in a sewage treatment water tank, for example, an oxidation ditch tank, using an underwater stirrer.

オキシデーションディッチ(以下ＯＤという。)処理槽内の水面に浮遊発生するスカムを収集・除去するため、該ＯＤ槽内に設置される曝気機又は攪拌機の上流側の外側壁より下流側の該曝気機又は攪拌機に向けて水面上にオイルフェンス状のスカム収集ガイドを逆三角状に配置することで、上流から表面流に乗って浮遊移動してくるスカムを当該曝気機又は攪拌機の吸込口に誘導吸引させる事で、当該スカムを水中に巻き込ませ水中内の活性汚泥に接触吸着させ一体とすることで水中に完全に取り込ますことで水面に浮遊するスカムを除去する方法が用いらている（例えば、特許文献１参照）。 Oxidation ditch (hereinafter referred to as OD) The aeration downstream of the outer wall on the upstream side of the aerator or stirrer installed in the OD tank in order to collect and remove scum that floats on the water surface in the treatment tank By placing an oil fence-like scum collection guide on the water surface in an inverted triangular shape toward the agitator or stirrer, the scum floating on the surface flow from the upstream is guided to the suction port of the aerator or agitator A method of removing scum that floats on the surface of the water by sucking it into the water, bringing it into contact with the activated sludge in the water and bringing it into contact with the activated sludge so that it is completely taken into the water is used (for example, , See Patent Document 1).

しかし、このような方法では、表面水路巾を下流に向って縮小遮蔽することでスカム収集ガイドの誘導効果を得ており、当然の事ながらスカム収集ガイドの無い場合と比べて表面流速が低下するので、付着性の高いスカムは前述の上流側の外側壁及び誘導距離が長く曝気機又は攪拌機の吸込口より離れた位置のスカム収集ガイド誘導側面等にスカムが付着する事を完全に防止することが出来無いばかりでなく、スカム収集ガイドの背面の外側壁周辺部分の表面流は当該スカム収集ガイドにより遮られて流れの無い死水領域が形成され、該死水領域の水面上には折角除去したスカムが再び発生・付着すると共に、水処理効率の低下を誘発するという問題を有している。 However, in such a method, the guiding effect of the scum collection guide is obtained by reducing and shielding the surface channel width toward the downstream, and naturally the surface flow velocity is reduced compared to the case without the scum collection guide. Therefore, the highly adherent scum completely prevents the scum from adhering to the above-mentioned upstream outer wall and the scum collection guide guiding side surface, etc., where the induction distance is long and away from the suction port of the aerator or the agitator. In addition, the surface flow around the outer wall of the back surface of the scum collection guide is blocked by the scum collection guide to form a dead water region where no flow occurs, and the scum is removed on the water surface of the dead water region. Are generated and adhered again, and the water treatment efficiency is reduced.

特許第２９２３４１１号公報（第１図）Japanese Patent No. 2923411 (FIG. 1)

解決しようとする課題は、処理槽内の表面流速を低下することなく、浮遊するスカムを効率良く収集・除去すると共に死水領域が形成されることなく水処理効率の低下を誘発しないスカム除去装置を提供することである。 The problem to be solved is a scum removing device that efficiently collects and removes floating scum without reducing the surface flow velocity in the treatment tank and does not induce a reduction in water treatment efficiency without forming a dead water region. Is to provide.

本発明では、汚水処理槽内の水路気中部に左右送行用のガイドレールを付設し、該ガイドレールの下方に左右送行可能に水中攪拌機の外周を覆う吸込みカバーに設けられたガイドにより該水中攪拌機をガイドレールに係合し、前記吸込みカバーの上流側始端上縁部を切欠き上流側に向って末広状に吸込口を形成し、更に、前記吸込みカバーの外周には水中攪拌機を浮かすためのフロートを設け、前記ガイドに付設される繋留具により水中攪拌機が繋留させるよう構成したことを最も主要な特徴とする。 In the present invention, a guide rail for left and right sending is attached to the middle part of the water channel in the sewage treatment tank, and the underwater stirrer is provided by a guide provided on a suction cover that covers the outer periphery of the underwater stirrer so as to be able to send left and right below the guide rail. Is engaged with the guide rail, the upper edge of the upstream end of the suction cover is cut out, a suction port is formed in a divergent shape toward the upstream side, and an underwater agitator is floated on the outer periphery of the suction cover. The main feature is that a float is provided and the underwater agitator is anchored by a anchor attached to the guide.

本発明によれば、スカム除去に移送水量の多いプロペラ式の水中攪拌機を用いて、吸込口の上縁部を切欠き状に開口しているため水中攪拌機による吸引作用と表層流の越流作用とが相俟って浮遊スカムを勢いよく大量に吸引・破砕・攪拌排水することができるので効率の良いスカム除去ができ、更に、左右送行用のガイドレールの下方に左右送行可能に水中攪拌機が係合されているので、スカム発生の多いポイントに水中攪拌機を容易に移動設置できるので、効率良くスカムを収集除去することができる。また、吐出口より吐出される攪拌流により吐出口の終端に付設された舵板および左右送行の切換え機構により水中攪拌機が左右方向に自走されるので、別途送行駆動源および同駆動装置を必要としないため構造が簡単でイニシャルおよびランニングコストを低く押させることができるとともに、煩わしい人為作業によるスカム除去装置の移動設定を行う必要がないという利点を有している。更に、左右方向の推力を得るため攪拌流を舵板面に当てることにより、攪拌流内に含まれる汚泥は広範囲に飛散攪拌されるので槽内汚泥濃度がより一層均一化されるという副次的効果も有している。 According to the present invention, a propeller-type underwater stirrer with a large amount of transferred water is used for scum removal, and the upper edge of the suction port is opened in a notch shape. Combined with the above, a large amount of floating scum can be sucked, crushed and agitated and drained efficiently, so efficient scum removal can be achieved, and an underwater agitator can be moved left and right below the left and right guide rails. Since they are engaged, the underwater agitator can be easily moved and installed at a point where scum is frequently generated, so that scum can be collected and removed efficiently. Also, since the underwater agitator is self-propelled in the left-right direction by the rudder plate attached to the end of the discharge port by the stirring flow discharged from the discharge port and the left-right feed switching mechanism, a separate drive drive source and drive device are required Therefore, there is an advantage that the structure is simple and the initial and running costs can be lowered, and the movement setting of the scum removing device by the troublesome manual work is not required. Further, by applying a stirring flow to the rudder plate surface in order to obtain a thrust in the left-right direction, the sludge contained in the stirring flow is scattered and stirred over a wide range, so that the concentration of sludge in the tank is made more uniform. It also has an effect.

汚水処理槽内の水路気中部に左右送行用のガイドレールを付設し、該ガイドレールの下方に左右送行可能に水中攪拌機の外周を覆う吸込みカバーに設けられたガイドにより該水中攪拌機をガイドレールに係合し、前記吸込みカバーの上流側始端上縁部を切欠き上流側に向って末広状に吸込口を形成し、更に、前記吸込みカバーの外周には水中攪拌機を浮かすためのフロートを設け、前記ガイドに付設される繋留具により水中攪拌機が繋留させる。また、水中攪拌機の前方へ導出された舵軸支持座によって舵軸が枢支され、該舵軸の前方に舵板が張出されると共に舵軸支持座の周辺部には舵角調節機構が付設され、吸込みカバー下面外部の前記水中攪拌機の中心線上に支点を有する操舵用槓杆が舵板の先端近くへ連繋され、水中攪拌機の両側方から対向状に配設されたストッパーによって操舵用槓杆の回動角度が規制され、前記水中攪拌機の中心線上に基点を置くコイルスプリングの始端部が舵板の先端近くに連結され、該伸縮構造体の作用によって舵板の反転回動力が付勢されるよう構成する。 A guide rail for left and right sending is attached to the middle of the water channel in the sewage treatment tank, and the submerged stirrer is made into a guide rail by a guide provided on a suction cover that covers the outer periphery of the submerged stirrer so as to be able to send left and right below the guide rail Engaging, forming a suction port in a divergent shape toward the upstream side by notching the upstream start end upper edge of the suction cover, and further providing a float for floating an underwater agitator on the outer periphery of the suction cover, An underwater stirrer is tethered by a tether attached to the guide. A rudder shaft is pivotally supported by a rudder shaft support seat led to the front of the underwater agitator, and a rudder plate is projected in front of the rudder shaft, and a rudder angle adjustment mechanism is attached to the periphery of the rudder shaft support seat. A steering rod having a fulcrum on the center line of the underwater stirrer outside the suction cover is connected to the vicinity of the tip of the rudder plate, and the steering rod is rotated by a stopper disposed oppositely from both sides of the underwater stirrer. The moving angle is regulated, the starting end of the coil spring that is located on the center line of the underwater stirrer is connected near the tip of the rudder plate, and the reverse turning force of the rudder plate is biased by the action of the telescopic structure Constitute.

図１において、１は汚水処理水槽、２は該処理槽１内の水路気中部に設けられた左右送行用のガイドレールであり、３は該ガイドレール２の下方に左右送行可能に表層水ともに浮遊スカムを吸引・破砕し吐出口７より攪拌排水する前部にプロペラ１２を有する水中攪拌機３であり、該水中攪拌機３の外周を覆う吸込みカバー４に設けられたガイド５により該水中攪拌機３をガイドレール２に係合し、前記吸込みカバー４の上流側始端は表層流がスムーズに流入するよう上縁部を切欠き上流側に向って末広状に吸込口６を形成し、吸込みカバー４の外周には水中攪拌機３を浮かすためのフロート８が設けられ、前記ガイド５に付設される例えばチェーンやロープ等による繋留具９により水中攪拌機３が繋留させるよう構成する。 In FIG. 1, 1 is a sewage treatment water tank, 2 is a guide rail for left and right sending provided in the middle of the water channel in the treatment tank 1, and 3 is a surface rail that can be sent left and right below the guide rail 2. A submersible agitator 3 having a propeller 12 at the front portion for sucking and crushing floating scum and agitating and draining from the discharge port 7. The submerged agitator 3 is guided by a guide 5 provided on a suction cover 4 covering the outer periphery of the underwater agitator 3. The upper end of the suction cover 4 is engaged with the guide rail 2 and the upper edge of the suction cover 4 is notched so that the surface layer flows smoothly, and a suction port 6 is formed in a divergent shape toward the upstream side. A float 8 for floating the underwater agitator 3 is provided on the outer periphery, and the underwater agitator 3 is anchored by a anchor 9 such as a chain or rope attached to the guide 5.

実施例１のスカム除去装置を前提として、図２および図３に示すよう、１４は水中攪拌機３の前方へ導出された舵軸支持座、１５は舵軸支持座１４の後端部に枢支された舵軸であり、該舵軸１５の前方に舵板が張出されると共に舵軸支持座１４の周辺部には舵角調節機構(図示せず)が付設されている。該舵角調節機構の具体例として、舵板１６の上縁から後方へ導延された縁材１６ｅの両側方から対向するように、舵軸支持座１４に配設された係止ピン１７により回動角度が規制されるが、該係止ピン１７の配設間隔を変更することによって舵板１６の回動角度は調整可能となる。取付孔を配設することで上記係止ピン１７の配設間隔を変更することも可能である。１９は前記水中攪拌機３の中心線上に支点２０を有する操舵用槓杆であり、該操舵用槓杆９の前部に穿設された長孔２１が、舵板１６の上縁前方部に植設された係合ピン２２に係合することにより連繋される。２３，２３は吸込みカバー４の両側方から対向状に配設されたストッパーであり、ガイドレール２の下方を水中攪拌機３が左右に送行する際に、例えば、操舵用槓杆１９の後方導延部がストッパー２３，２３と当接することで、操舵用槓杆１９の反転位置が一定範囲に規制される。２４は舵板１６に反転回動力を付勢するための伸縮構造体であって、水中攪拌機３の中心線上に基点２４ａを置き、始端部２４ｂは舵板１６の先端近くに連結されている。該伸縮構造体２４の具体例として、コイルスプリングやゴム紐体のほかエアーシリンダーやオイルシリンダーを用いることもできる。また、水中攪拌機３の自走性を円滑にするためガイドレール２と摺接するガイド５内周側に摺動材或いはローラ等を設けることが望ましい。 Assuming the scum removing device of the first embodiment, as shown in FIGS. 2 and 3, 14 is a rudder shaft support seat led to the front of the underwater agitator 3, and 15 is pivotally supported at the rear end portion of the rudder shaft support seat 14. A rudder shaft is projected in front of the rudder shaft 15 and a rudder angle adjusting mechanism (not shown) is attached to the periphery of the rudder shaft support seat 14. As a specific example of the rudder angle adjusting mechanism, a locking pin 17 disposed on the rudder shaft support seat 14 is opposed to both sides of the edge member 16e extended rearward from the upper edge of the rudder plate 16. Although the rotation angle is restricted, the rotation angle of the rudder plate 16 can be adjusted by changing the arrangement interval of the locking pins 17. It is also possible to change the arrangement interval of the locking pins 17 by arranging the mounting holes. Reference numeral 19 denotes a steering rod having a fulcrum 20 on the center line of the underwater agitator 3, and a long hole 21 drilled in the front portion of the steering rod 9 is implanted in the front portion of the upper edge of the steering plate 16. They are linked by engaging with the engaging pins 22. Reference numerals 23 and 23 are stoppers disposed opposite to each other from both sides of the suction cover 4. When the underwater agitator 3 feeds the lower side of the guide rail 2 to the left and right, for example, the rear extension part of the steering rod 19 Is in contact with the stoppers 23, 23, the reversing position of the steering rod 19 is restricted within a certain range. Reference numeral 24 denotes a telescopic structure for energizing the reverse turning force to the rudder plate 16. The base point 24 a is placed on the center line of the underwater agitator 3, and the start end 24 b is connected near the tip of the rudder plate 16. As a specific example of the stretchable structure 24, an air cylinder or an oil cylinder can be used in addition to a coil spring or a rubber string. In order to make the submerged stirrer 3 self-propelled smoothly, it is desirable to provide a sliding material, a roller, or the like on the inner peripheral side of the guide 5 that is in sliding contact with the guide rail 2.

本発明の実施例１おけるスカム除去装置の構成を説明するための斜視図である。It is a perspective view for demonstrating the structure of the scum removal apparatus in Example 1 of this invention. 本発明の実施例２おけるスカム除去装置の側面図である。It is a side view of the scum removal apparatus in Example 2 of this invention. 本発明の実施例２おけるスカム除去装置の底面図である。It is a bottom view of the scum removal apparatus in Example 2 of this invention.

符号の説明Explanation of symbols

１汚水処理水槽
２ガイドレール
３水中攪拌機
４吸込みカバー
５ガイド
６吸込口
７吐出口
８フロート
９繋留具
１２プロペラ
１４舵軸支持座
１５舵軸
１６舵板
１９操舵用槓杆
２０支点
２３ストッパー
２４伸縮構造体
２４ａ基点
２４ｂ始端部 DESCRIPTION OF SYMBOLS 1 Wastewater treatment tank 2 Guide rail 3 Submerged stirrer 4 Suction cover 5 Guide 6 Suction port 7 Discharge port 8 Float 9 Anchor 12 Propeller 14 Rudder shaft support seat 15 Rudder shaft 16 Rudder plate 19 Steering rod 20 Supporting point 23 Stopper 24 Telescopic structure Body 24a Base point 24b Start end

Claims

汚水処理槽内の水路気中部に左右送行用のガイドレールを付設し、該ガイドレールの下方に左右送行可能に前部にプロペラを有する水中攪拌機の外周を覆う吸込みカバーに設けられたガイドにより該水中攪拌機をガイドレールに係合し、前記吸込みカバーの上流側始端上縁部を切欠き上流側に向って末広状に吸込口を形成し、更に、前記吸込みカバーの外周には水中攪拌機を浮かすためのフロートを設け、前記ガイドに付設される繋留具により水中攪拌機が繋留させるよう構成したことを特徴する、スカム除去装置。 A guide rail for left and right sending is attached to the middle part of the water channel in the sewage treatment tank, and the guide is provided on the suction cover that covers the outer periphery of the submerged stirrer having a propeller at the front so as to be able to send left and right below the guide rail. Engage the underwater agitator with the guide rail, cut out the upper edge of the upstream start end of the suction cover and form a suction port widening toward the upstream side, and float the underwater agitator on the outer periphery of the suction cover The scum removing device is characterized in that a submersible agitator is anchored by a anchor attached to the guide.

請求項１記載のスカム除去装置において、水中攪拌機の前方へ導出された舵軸支持座によって舵軸が枢支され、該舵軸の前方に舵板が張出されると共に舵軸支持座の周辺部には舵角調節機構が付設され、吸込みカバー下面外部の前記水中攪拌機の中心線上に支点を有する操舵用槓杆が舵板の先端近くへ連繋され、水中攪拌機の両側方から対向状に配設されたストッパーによって操舵用槓杆の反転位置が規制され、前記水中攪拌機の中心線上に基点を置く伸縮構造体の始端部が舵板の先端近くに連結され、該伸縮構造体の作用によって舵板の反転回動力が付勢されるよう構成したことを特徴とする、スカム除去装置。 The scum removing device according to claim 1, wherein a rudder shaft is pivotally supported by a rudder shaft support seat led forward of the submerged stirrer, a rudder plate is projected in front of the rudder shaft, and a peripheral portion of the rudder shaft support seat Is provided with a steering angle adjusting mechanism, and a steering rod having a fulcrum on the center line of the underwater agitator outside the lower surface of the suction cover is connected to the vicinity of the tip of the rudder plate, and is arranged oppositely from both sides of the underwater agitator. The reversing position of the steering rod is regulated by the stopper, and the start end of the telescopic structure that has the base point on the center line of the underwater stirrer is connected near the front end of the rudder plate. A scum removing device configured to be energized with rotational force.

請求項２記載のスカム除去装置において、舵板の反転回動力を付勢する伸縮構造体がコイルスプリングであることを特徴する、スカム除去装置。 3. The scum removing device according to claim 2, wherein the telescopic structure for energizing the reverse turning force of the steering plate is a coil spring.