JP5720061B2

JP5720061B2 - Pressurized floating scum separation treatment device

Info

Publication number: JP5720061B2
Application number: JP2013228726A
Authority: JP
Inventors: 東　利保; 利保東; 利光東
Original assignee: KABUSHIKI KAISHA SAN-EI
Current assignee: KABUSHIKI KAISHA SAN-EI
Priority date: 2013-10-16
Filing date: 2013-10-16
Publication date: 2015-05-20
Anticipated expiration: 2033-10-16
Also published as: JP2015077586A

Description

本発明は、加圧浮上式スカム分離処理装置に関する。 The present invention relates to a pressurized floating scum separation processing apparatus.

収集したスカム含有汚水を浮上分離槽に導入するに当って加圧によりエアーを溶解させた水を伴って減圧下で噴出させてスカムの浮上を促進させることにより浮上したスカムを上部より排出するようにした加圧浮上方式は既に知られている技術である。そうした技術に関連するものとして、特許文献１に開示された技術がある。 When the collected scum-containing sewage is introduced into the levitation separation tank, the scum that has been levitated will be discharged from the top by spraying under reduced pressure with water in which air is dissolved by pressurization and promoting scum ascent. The pressurized levitation method is a known technique. As a technique related to such a technique, there is a technique disclosed in Patent Document 1.

特開２００５−１１１３７５号JP 2005-111375 A

上記特許文献１による技術は、浮上したスカムを加圧浮上濃縮槽（浮上分離槽）に設けられたスカム排出トラフに向けて掻き寄せるスクレーパと、このスクレーパから送られてくるスカムを前記加圧浮上濃縮槽の湾曲面に添って回転することにより掻き出す排出機とを有するとともに、排出機からのスカムを受け入れてスカム処理施設へと送るスカム排出トラフとを有する。
このスカム加圧浮上濃縮装置は、浮上したスカムを加圧浮上濃縮槽から排出するとともにこれらのスカムを遠く離れたスカム処理施設へ搬送できるようにしたものであるが、ここで浮上させたスカムを排出する手段は、掻寄板を外周に突設したチェーンであるスクレーパと、湾曲面に添って運動する掻上羽根付きで回転軸回りを回転する排出機とでなり、排出機からのスカムをスカム排出トラフへ排出するようにしたものであり、従って、浮上したスカムは水分を充分に含んでおりそれをそのまま排出するものであるため、スカム処理施設への搬送に無駄な電力を消費し、しかも搬送先でスカムと水分とを分離する必要が出てくる。そのため、スカム排出トラフの中にスクリュウを装備してスカムを脱水処理するようにすることも考えられるが、スクレーパとスクリュウの各駆動系を独立して構成したとすると、排出機の駆動系も独立して設けられることから、装置として構造の複雑化を招くだけでなくコストダウンも図りにくいという不利も出てくる。The technique according to Patent Document 1 discloses a scraper that rakes a scum that floats toward a scum discharge trough provided in a pressurized levitation concentration tank (a levitation separation tank), and a scum that is sent from the scraper. And a scum discharge trough that receives the scum from the discharger and sends it to the scum treatment facility.
This scum pressurized levitation concentrator discharges the scum that has been levitated from the pressurized levitation and concentration tank and allows these scum to be transported to a remote scum treatment facility. The means for discharging consists of a scraper, which is a chain with a scraping plate protruding from the outer periphery, and a discharger with a scraping blade that moves along the curved surface and rotates around the rotation axis. The scum discharge trough is discharged, so the scum that floats up contains enough moisture and discharges it as it is, so that wasteful power is consumed for transportation to the scum treatment facility, Moreover, it is necessary to separate scum and moisture at the transport destination. Therefore, it is conceivable to install a screw in the scum discharge trough to dehydrate the scum. However, if the scraper and screw drive systems are configured independently, the drive system of the discharge machine is also independent. Therefore, there is a disadvantage that not only the structure of the apparatus is complicated but also it is difficult to reduce the cost.

本発明は、こうした問題を解決しようとするものであり、スクレーパとスクリュウとを組み合わせて浮上し掻き揚げられたスカムに脱水処理を加えることでスカム処理施設への搬送が無駄な電力消費なくまた施設での水分分離も不要なものにするとともにスクレーパとスクリュウの各駆動系を連動関係にして装置の構造の簡略化とコストダウンが図れるようにした加圧浮上式スカム分離処理装置を提供することを目的とする。 The present invention is intended to solve these problems. By adding a dewatering process to a scum that has been lifted and scraped in combination with a scraper and a screw, transport to a scum processing facility is possible without wasteful power consumption. To provide a pressurized floating scum separation treatment device that eliminates the need for water separation at the same time and simplifies the structure of the device and reduces costs by linking the drive systems of the scraper and screw. Objective.

本発明は上記目的を達成するため、請求項１に記載の発明は、矩形の底面壁とその底面壁の４つの各辺から立ち上がる前後左右の立面壁とを備えた四角立体式の躯体とされその前側立面壁の躯体内手前位置に区画板が立ち上げられて槽が形成されるとともに槽内にはスカム含有汚水と空気溶解水とが一定レベルの水面を保つように導入されてその導入水からは水面にスカムが浮上可能とされた浮上分離槽と、浮上分離槽内の水面以下に対応して傾斜下端が位置し傾斜中途は区画板上端に位置するとともに上端は区画板上端から浮上分離槽外へと傾斜状に伸びるように配置された傾斜板状の掻揚ガイドと、掻揚ガイドの上端を介して浮上分離槽外部に位置するように配置されたスカム排出トラフと、前記スカム排出トラフ内に設けられて脱水機能を備えて回転駆動自在に設けられたスクリュウと、浮上したスカムをスカム排出トラフに向けて掻き寄せ掻き揚げるものとして前記スクリュウと連動する関係で単一の駆動源によって駆動されるようになっているスクレーパとを有し、前記スクレーパは、掻揚ガイドの上部よりも上側方に位置する前軸と、後側立面壁のある水面上に位置する後軸と、前軸と後軸間に配置された中間軸とを備えるとともに、これら各軸の左右両端に設けられたスプロケットを介して左右一対の掻揚連動材が掛けられ、これら掻揚連動材には水面から掻揚ガイド上を介して周回運動をするスクレーパ本体の複数枚が取り付けられている加圧浮上式スカム分離処理装置であって、前記中間軸および中間スプロケットは、先端が掻き寄せ方向に曲がったくの字折り曲げバー状に形成されているとともにその基部が掻揚連動材に前後回転可能に取り付けられた複数本のスクレーパ本体が掻揚ガイドに先端がさしかかる前までは垂直にたれ下がりそののち先端が掻揚ガイド上にさしかかったあとは掻揚連動材からの垂直線に対し相対角度を次第に開いて７０度ないし８０度の範囲内まで後倒れになりながら掻揚ガイド上に先端が乗った状態で掻き揚げ動作をしてのち前記角度範囲の後倒れの状態を保ちながら掻揚受面上に先端が乗った状態で掻き揚げ動作をするように、掻揚ガイドの傾斜方向中途上側方近くに配置されていることを特徴とする。In order to achieve the above object, the present invention provides a rectangular three-dimensional housing having a rectangular bottom wall and front, rear, left and right elevation walls rising from each of the four sides of the bottom wall. A partition plate is raised at a position in front of the enclosure on the front side elevation wall to form a tank, and scum-containing sewage and air-dissolved water are introduced into the tank to maintain a certain level of water surface. A floating separation tank in which scum can float on the water surface from the introduced water, and the lower end of the slope is located below the surface of the water in the floating separation tank, the middle of the slope is located at the upper end of the partition plate, and the upper end is from the upper end of the partition plate An inclined plate-shaped raking guide disposed so as to be inclined to the outside of the flotation separation tank, a scum discharge trough disposed so as to be located outside the flotation separation tank via the upper end of the flotation guide, Dehydrator installed in the scum discharge trough And a screw provided so as to be freely rotatable, and driven by a single drive source in a relation with the screw as if the scum that floated was scraped and lifted toward the scum discharge trough. The scraper is disposed between the front shaft and the rear shaft, the front shaft positioned above the upper portion of the lifting guide, the rear shaft positioned on the water surface with the rear elevation wall, and the rear shaft. Intermediate shafts, and a pair of left and right rake-up interlocking materials are hung through sprockets provided at the left and right ends of each of the shafts. a plurality upper floatation is attached formula scum separation processing apparatus of the scraper body to the orbital movement, the intermediate shaft and the intermediate sprocket, the wanted bend direction raked tip shaped folding A plurality of scraper bodies, which are formed in a bar shape and the base part of which is attached to the raked interlocking member so as to be able to rotate back and forth, sag vertically until the tip of the scraper guides, and then the tip is lifted up. After reaching the guide, the relative angle with respect to the vertical line from the raked interlocking member is gradually opened, and the tip is placed on the rake guide while being tilted back to the range of 70 to 80 degrees. It is arranged near the upper side in the middle of the inclination direction of the lifting guide so that the lifting operation is performed with the tip on the lifting surface while keeping the tilted state of the angle range after the operation. It is characterized by being .

上述したように請求項１に記載の発明は、矩形の底面壁とその底面壁の４つの各辺から立ち上がる前後左右の立面壁とを備えた四角立体式の躯体とされその前側立面壁の躯体内手前位置に区画板が立ち上げられて槽が形成されるとともに槽内にはスカム含有汚水と空気溶解水とが一定レベルの水面を保つように導入されてその導入水からは水面にスカムが浮上可能とされた浮上分離槽と、浮上分離槽内の水面以下に対応して傾斜下端が位置し傾斜中途は区画板上端に位置するとともに上端は区画板上端から浮上分離槽外へと傾斜状に伸びるように配置された傾斜板状の掻揚ガイドと、掻揚ガイドの上端を介して浮上分離槽外部に位置するように配置されたスカム排出トラフと、前記スカム排出トラフ内に設けられて脱水機能を備えて回転駆動自在に設けられたスクリュウと、浮上したスカムをスカム排出トラフに向けて掻き寄せ掻き揚げるものとして前記スクリュウと連動する関係で単一の駆動源によって駆動されるようになっているスクレーパとを有し、前記スクレーパは、掻揚ガイドの上部よりも上側方に位置する前軸と、後側立面壁のある水面上に位置する後軸と、前軸と後軸間に配置された中間軸とを備えるとともに、これら各軸の左右両端に設けられたスプロケットを介して左右一対の掻揚連動材が掛けられ、これら掻揚連動材には水面から掻揚ガイド上を介して周回運動をするスクレーパ本体の複数枚が取り付けられている加圧浮上式スカム分離処理装置であって、前記中間軸および中間スプロケットは、先端が掻き寄せ方向に曲がったくの字折り曲げバー状に形成されているとともにその基部が掻揚連動材に前後回転可能に取り付けられた複数本のスクレーパ本体が掻揚ガイドに先端がさしかかる前までは垂直にたれ下がりそののち先端が掻揚ガイド上にさしかかったあとは掻揚連動材からの垂直線に対し相対角度を次第に開いて７０度ないし８０度の範囲内まで後倒れになりながら掻揚ガイド上に先端が乗った状態で掻き揚げ動作をしてのち前記角度範囲の後倒れの状態を保ちながら掻揚受面上に先端が乗った状態で掻き揚げ動作をするように、掻揚ガイドの傾斜方向中途上側方近くに配置されていることを特徴とするので、スクリュウによるスカムの脱水効果が得られるだけでなくその前段階においてスクレーパ本体による掻き揚げ時にも脱水効果が得られるようにした加圧浮上式スカム分離処理装置を提供することができる。 As described above, the invention described in claim 1 is a rectangular three-dimensional housing having a rectangular bottom wall and front, rear, left and right elevation walls rising from each of the four sides of the bottom wall. A partition plate is raised at a position in front of the housing to form a tank, and scum-containing sewage and air-dissolved water are introduced into the tank so as to maintain a certain level of water surface. The levitation separation tank in which the scum can float, the lower end of the slope corresponding to the water surface below the levitation separation tank, the middle of the slope is located at the upper end of the partition plate, and the upper end from the upper end of the partition plate to the outside of the floating separation tank An inclined plate-shaped raking guide arranged so as to extend in an inclined manner, a scum discharge trough arranged so as to be positioned outside the floating separation tank via the upper end of the rafting guide, and provided in the scum discharge trough Rotating drive with dehydration function And a scraper adapted to be driven by a single drive source in conjunction with the screw as a scum that lifts and lifts the raised scum toward the scum discharge trough. The scraper includes a front shaft located above the upper part of the lifting guide, a rear shaft located on the water surface having the rear elevation wall, and an intermediate shaft disposed between the front shaft and the rear shaft. And a pair of left and right raked interlocking members are hung through sprockets provided at the left and right ends of each shaft, and these raked interlocking members make a revolving motion from above the water via the lifting guide. a plurality is floatation above equation scum separation device mounted in the body, the intermediate shaft and the intermediate sprocket, on the form of the bar-shaped bent-shaped want bent in the direction raked tip And the scraper body, whose base is attached to the raked interlocking member so as to be able to rotate back and forth, hangs vertically before the tip of the rake guide touches, and then the tip hits the rake guide. The rake is lifted up with the tip placed on the rake guide while the angle is gradually opened relative to the vertical line from the raked interlocking member and falls back to the range of 70 to 80 degrees. It is arranged near the upper side in the middle of the inclination direction of the lifting guide so as to perform the lifting operation with the tip on the lifting surface while maintaining the state of falling down in the angle range. Therefore, a pressure floating type scum separation treatment device that not only provides the dewatering effect of the scum by the screw, but also obtains the dewatering effect at the time of scraping by the scraper body in the previous stage. Can be provided.

本発明の一実施形態を図２のＩ−Ｉ線に沿って示す横断面図。 FIG. 3 is a cross-sectional view showing an embodiment of the present invention along the line II in FIG. 2. 図１のＩＩ−ＩＩ線断面図。 II-II sectional view taken on the line of FIG. 図２のＩＩＩ−ＩＩＩ線断面図。 III-III sectional view taken on the line of FIG. 他の実施形態を示す横断面図。 The cross-sectional view which shows other embodiment. 図４のＶ−Ｖ線断面図。 VV sectional view taken on the line of FIG. スクレーパについての他の実施形態を示す斜視図。 The perspective view which shows other embodiment about a scraper. スクレーパについての他の実施形態を示す斜視図。 The perspective view which shows other embodiment about a scraper. 掻揚方法の他の実施形態を示す側断面図。 Side sectional drawing which shows other embodiment of the raking method.

図１ないし図３は本発明である加圧浮上式スカム分離処理装置の一実施形態を示している。１は処理槽で、この処理槽１は、設置基盤から一定高さ（例えば、２ｍ前後）でその内部に出入り可能な架台（図示省略）上に脱着可能に載置されている。
処理槽１は、矩形の底面壁とその底面壁の４つの各辺から立ち上がって互いに溶接密閉化された前後左右の立面壁とでなる上面開放型の四角立体式の躯体になっており、その内部右寄りには、上部を残し槽１内を横断する形で垂直な区画板２が立ち上げられることで浮上分離槽３が形成されている。
浮上分離槽３内には給水手段（図示省略）による供給水４により一定のレベルに水面４ａが設定されている。浮上分離槽３の底壁上には浮上誘導パイプ５がストレートな筒体として固定されているとともに複列式（あるいはドーナツ式など）の散気パイプ６が底面上にあるように固定配備されている。FIG. 1 to FIG. 3 show an embodiment of a pressurized floating scum separation processing apparatus according to the present invention. Reference numeral 1 denotes a treatment tank, and the treatment tank 1 is detachably mounted on a pedestal (not shown) that can enter and exit from the installation base at a certain height (for example, around 2 m).
The treatment tank 1 is a rectangular solid body with an open top surface, which is composed of a rectangular bottom wall and front, rear, left and right elevation walls that stand up from each of the four sides of the bottom wall and are hermetically sealed. A floating separation tank 3 is formed on the right side of the interior by raising a vertical partition plate 2 so as to cross the inside of the tank 1 while leaving the upper part.
In the floating separation tank 3, a water surface 4a is set at a certain level by water 4 supplied by water supply means (not shown). A floating guide pipe 5 is fixed on the bottom wall of the floating separation tank 3 as a straight cylinder, and a double-row (or donut-type) aeration pipe 6 is fixedly disposed on the bottom surface. Yes.

区画板２の下部と処理槽１の立面壁下部との間には、分離水管８が通されて浮上分離槽３内下層水を処理槽１の外部に設けた分離水槽９内に導くようにしてある。１０は分離水管９内に設けられたフィルターで、前記下層水をきれいな形の分離水１１として分離水槽９内に導くためのものである。１２はオーバーフロー口で、分離水槽９内の水面レベルを一定化して浮上分離槽３内の水面４ａをそれと同じレベルに規定するためのものである。 A separation water pipe 8 is inserted between the lower part of the partition plate 2 and the lower part of the vertical wall of the treatment tank 1 so as to guide the lower layer water in the floating separation tank 3 into the separation water tank 9 provided outside the treatment tank 1. It is. Reference numeral 10 denotes a filter provided in the separation water pipe 9 for guiding the lower layer water into the separation water tank 9 as clean separation water 11. Reference numeral 12 denotes an overflow port for keeping the water surface level in the separation water tank 9 constant and defining the water surface 4a in the floating separation tank 3 at the same level.

１５は空気溶解装置で、処理槽１の外部に独立して設けられ、この空気溶解装置１５は、上下が閉止型の縦筒状の空気溶解槽１６を備える。空気溶解槽１６の内部には、空気供給源（コンプレッサなど）１７からの圧縮空気を受けて微細化する空気微細化部１８がその底部に設けられるとともに、筒内中途には、バネ１９によって通孔２０の向きに付勢され一定圧力で開く開閉弁２１が設けられている。２２は入側配管で、分離水槽９に基端が接続されるとともにトラフ中に給水ポンプ２３が接続され先端が空気溶解槽１６の加圧用バルブ２１より上流側（下側）に接続されていて分離水１１を空気溶解槽１６内に導くとともに微細化した空気を内圧のかかった状態下で過飽和状態まで溶解するように構成されている。
加圧用バルブ２１は一定の内圧以上で開き空気の十分溶解した水を出側配管２４から排出するようになっている。入側配管２２は、図２に破線で示すように浮上分離槽３に接続してもよい。
出側配管２４は汚水供給管２５に接続され、収集したスカム含有汚水と前記空気溶解水とを合流させてのち、前記浮上誘導パイプ５内にこれら合流化した汚水を導くようになっている。空気供給源１７と散気パイプ６とは給気パイプ２６で接続されている。
尚、散気パイプ６は浮上誘導パイプ５の外周に設置してもよく、また、汚水供給管２５は浮上誘導パイプ５の下部中央に連通状に接続して合流水を浮上させるようにしてもよい。Reference numeral 15 denotes an air dissolving device, which is provided outside the processing tank 1 independently. The air dissolving device 15 includes a vertical cylindrical air dissolving tank 16 whose top and bottom are closed. An air refining section 18 that receives compressed air from an air supply source (compressor or the like) 17 to be refined is provided in the inside of the air dissolution tank 16, and is passed through a spring 19 in the middle of the cylinder. An on-off valve 21 that is urged in the direction of the hole 20 and opens at a constant pressure is provided. 22 is an inlet side pipe, the base end is connected to the separation water tank 9, the water supply pump 23 is connected to the trough, and the tip is connected to the upstream side (lower side) of the pressurizing valve 21 of the air dissolution tank 16. The separation water 11 is introduced into the air dissolution tank 16 and the refined air is dissolved to a supersaturated state under a state where internal pressure is applied.
The pressurizing valve 21 opens at a predetermined internal pressure or higher and discharges water in which the air is sufficiently dissolved from the outlet side pipe 24. The inlet side pipe 22 may be connected to the floating separation tank 3 as shown by a broken line in FIG.
The outlet side pipe 24 is connected to a sewage supply pipe 25 so as to join the collected scum-containing sewage and the air-dissolved water, and then guide the combined sewage into the levitation guide pipe 5. The air supply source 17 and the diffuser pipe 6 are connected by an air supply pipe 26.
The diffuser pipe 6 may be installed on the outer periphery of the levitation guide pipe 5, and the sewage supply pipe 25 is connected to the lower center of the levitation guide pipe 5 so as to float the combined water. Good.

処理槽１の上部には槽蓋３０が開閉可能に取り付けられる一方、処理槽１内の上部には、スクレーパ（スカム掻寄・掻揚装置）３２が設けられるとともに、区画板２の上部には、処理槽１の内幅と同じ外幅とされた平坦な金属板を基材としてそれをくの字状に屈曲成形してなる掻揚ガイド３３が上端３３ａを水面４よりも大きく立ち上がらせた状態で固定して設けられている。３３ｂは掻揚受面で、４５度前後の斜面として形成されてその下端が水面４ａよりも少し没したレベルにある一方その水平な上端稜が前記上端３３ａとなっている。 A tank lid 30 is attached to the upper part of the processing tank 1 so as to be openable and closable. On the upper part of the processing tank 1, a scraper (scum scraping / raising device) 32 is provided, and an upper part of the partition plate 2 is provided. A scraping guide 33 formed by bending and forming a flat metal plate having the same outer width as the inner width of the treatment tank 1 into a base shape raised the upper end 33a larger than the water surface 4. It is fixed in the state. Reference numeral 33b denotes a rake receiving surface which is formed as an inclined surface of about 45 degrees and whose lower end is at a level slightly submerged than the water surface 4a, while its horizontal upper edge is the upper end 33a.

一方、スクレーパ３２は、前軸３５と後軸３６およびそれらの中間軸３７の３つの回転自在な軸を備え、これらの軸は処理槽１の側壁に両端支持状態にして取付られている。これらの軸３５，３６，３７の処理槽１内に対応する軸上位置には左右一対ずつの前スプロケット３８・後スプロケット３９・中間スプロケット４０が取り付けられ、これらのスプロケット３８〜４０を介して掻揚連動材（チェーンあるいはリンクチェーンなど）４１が左右一対をなすように掛装されている。４２はテンショナである。 On the other hand, the scraper 32 includes three rotatable shafts, that is, a front shaft 35, a rear shaft 36, and an intermediate shaft 37 thereof, and these shafts are attached to the side wall of the processing tank 1 in a state where both ends are supported. A pair of left and right front sprockets 38, rear sprockets 39, and intermediate sprockets 40 are attached to the axial positions of the shafts 35, 36, and 37 corresponding to the inside of the processing tank 1, and scraped through these sprockets 38 to 40. Lifting interlock members (chains or link chains) 41 are hung so as to form a pair of left and right. Reference numeral 42 denotes a tensioner.

そして掻揚連動材４１の外周には、図では３本のスクレーパ本体４３が装架されて水面４から掻揚ガイド３３を介して図２の矢印Ａ方向に循環駆動されるようになっている。４４は前軸３５の外部軸上に取り付けられた第２連動スプロケットである。尚、スクレーパ本体４３は、平坦な帯板状をなす浮力体で、木質や樹脂製のものでよく、また、その基部は掻揚連動材４１に対して直角状になるように固定されて立ち上がった姿勢のまま周回するようになっている。 In the drawing, three scraper bodies 43 are mounted on the outer periphery of the lifting interlocking member 41 and are driven to circulate from the water surface 4 in the direction of arrow A in FIG. . Reference numeral 44 denotes a second interlocking sprocket mounted on the outer shaft of the front shaft 35. The scraper main body 43 is a buoyant body having a flat strip shape, and may be made of wood or resin, and its base portion is fixed so as to be perpendicular to the rake interlocking member 41 and rises. It is designed to circulate in the same posture.

４７はスカム排出トラフで、半円筒状部分４７ａとそれより垂直に立ち上がる前板部４７ｂ・後板部４７ｃとを一体に有するＵ字樋形をなしている。半円筒状部分４７ａは図３に示すように一端がやや高く他端がやや低くなるように緩い傾斜姿勢で固定されている。後板部４７ｃは一端側が高さが低く他端側が高くされて前記掻揚ガイド３３の一端３３ａに沿って一体化されている。スカム排出トラフ４７の一端壁４７ｄと他端壁４７ｅは閉止板とされてこれらを介して傾斜状をなすスクリュウ軸４８が半円筒状部分４７ａに平行軸状をなすように回転自在に装架されている。そして、スクリュウ軸４８の外周にはスクリュウ羽根４９が取り付けられてスクリュウ５０が構成されるとともに、外部の駆動源（モーターと減速機の組み合わせ）５１により前記矢印Ｂ方向と同一方向である矢印Ｂ方向に駆動されるようになっている。 Reference numeral 47 denotes a scum discharge trough, which has a U-shaped saddle shape integrally including a semi-cylindrical portion 47a and a front plate portion 47b and a rear plate portion 47c that rise vertically. As shown in FIG. 3, the semi-cylindrical portion 47a is fixed in a gentle inclined posture so that one end is slightly higher and the other end is slightly lower. The rear plate portion 47 c is integrated along the one end 33 a of the raking guide 33 such that one end side is low and the other end side is high. One end wall 47d and the other end wall 47e of the scum discharge trough 47 are closed plates, and an inclined screw shaft 48 is rotatably mounted on the semicylindrical portion 47a so as to be parallel to the semicylindrical portion 47a. ing. A screw blade 49 is attached to the outer periphery of the screw shaft 48 to constitute a screw 50, and an arrow B direction that is the same as the arrow B direction by an external drive source (a combination of a motor and a speed reducer) 51. To be driven.

スクリュウ軸４８の他端外部には、第１連動スプロケット５３が装着されて連動チェーン５４を介して前記第２連動スプロケット４４を回転連動させるようになっている。５６は固定受盤、５７はシフト受盤で、固定受盤５６は、トラフ４７の端壁４７ａに添ってスクリュウ軸４８とは相対回転するように固定して設けられる一方、シフト受盤５７は、固定受盤５６に離間して対向するようにスクリュウ軸４８回りに非回転状態で配備され、これら固定受盤５６とシフト受盤５７との間にはシフト受盤５７を軸方向に直線的に進退案内するための軸・パイプの組み合わせでなるガイド５９が反発バネ５８とともに介装されている。
図１および図３に示すように運転前はシフト受盤５７はスクリュウ羽根４９の端面に当たった状態にある。矢印Ｓのようにスカムがスカム排出トラフ４７内に取り込まれてスクリュウ５０が回転駆動されると、スカムＳは矢印Ｘ方向に押しやられるようになるとともに、そのスカムＳの矢印Ｘ方向への押付け力によってバネ反発力を受けながらガイド５９の直線的な案内によりシフト受盤５７が同じＸ方向に後退運動をするようになる。A first interlocking sprocket 53 is mounted outside the other end of the screw shaft 48 so that the second interlocking sprocket 44 is rotationally interlocked via an interlocking chain 54. Reference numeral 56 denotes a fixed receiving plate, 57 denotes a shift receiving plate, and the fixed receiving plate 56 is provided so as to rotate relative to the screw shaft 48 along the end wall 47a of the trough 47. The non-rotating state is provided around the screw shaft 48 so as to face the fixed receiving plate 56 at a distance from each other. Between the fixed receiving plate 56 and the shift receiving plate 57, the shift receiving plate 57 is linear in the axial direction. A guide 59 composed of a combination of a shaft and a pipe for advancing and retreating is inserted along with a repulsion spring 58.
As shown in FIGS. 1 and 3, the shift receiving disk 57 is in contact with the end face of the screw blade 49 before operation. When the scum is taken into the scum discharge trough 47 as indicated by the arrow S and the screw 50 is driven to rotate, the scum S is pushed in the direction of the arrow X and the pressing force of the scum S in the direction of the arrow X As a result, the shift receiving plate 57 moves backward in the same X direction by the linear guide of the guide 59 while receiving the spring repulsive force.

これにより、スカムＳは脱水作用を受けるとともに、スカム排出トラフ４７の一端側底部に連通状に取り付けた排出シュート６０の上端開口が前記後退運動により開かれることになって脱水スカムがシュート６０を通じて次々に排出され図示しないコンテナやベルトコンベアなどの搬送手段により次のスカム処理施設に送られるように構成されている。尚、６１は排水口で排水パイプ６２により浮上分離槽３内に排水を戻すようにされている。 As a result, the scum S is subjected to a dehydrating action, and the upper end opening of the discharge chute 60 connected to the bottom of one end side of the scum discharge trough 47 is opened by the backward movement, so that the dewatered scum passes through the chute 60 one after another. And is sent to the next scum processing facility by a conveying means such as a container or a belt conveyor (not shown). In addition, 61 is a drain outlet, and drainage is returned to the floating separation tank 3 by a drain pipe 62.

浮上分離槽３内で水面４ａが設定された供給水４には、分離水１１中に微細空気が過飽和状態に溶解したものと収集したスカム含有汚水との合流水が汚水供給管２５を通じて浮上誘導パイプ５内から供給水４内へと噴出され、それにより供給水４内にはスカムが浮上分離して水面４ａ上にスカムＳとして浮遊形成されることとなる。散気パイプ６からの散気も浮上分離の促進につながる。
駆動源５１によりスクリュウ軸４８が回転駆動され第１連動スプロケット５３および連動チェーン５４が回転されると第２連動スプロケット４４を介して前軸３５が運動され、スクレーパ３２が循環駆動される。これにより、スクレーパ本体４３は水面のスカムＳを掻揚ガイド３３の方向に掻き寄せてのち、スカム排出トラフ４７内に落とし込むことにより回転駆動されているスクリュウ５０により矢印Ｘ方向である傾斜登り方向に掻き揚げられる。スカムは、前記のように圧縮され脱水されたものが排出シュート６０を通じて排出される。In the supply water 4 having a water surface 4 a set in the levitation separation tank 3, the combined water of the scum-containing sewage collected from the scum-containing sewage with the fine air dissolved in the separation water 11 is levitated through the sewage supply pipe 25. The scum is ejected from the pipe 5 into the supply water 4, whereby the scum floats and separates in the supply water 4 and floats as the scum S on the water surface 4 a. Air diffused from the air diffuser pipe 6 also leads to promotion of floating separation.
When the screw shaft 48 is rotationally driven by the drive source 51 and the first interlocking sprocket 53 and the interlocking chain 54 are rotated, the front shaft 35 is moved via the second interlocking sprocket 44 and the scraper 32 is circulated. As a result, the scraper main body 43 scrapes the scum S on the water surface in the direction of the lifting guide 33 and then drops it into the scum discharge trough 47 so that the scraper body 43 is rotated in the direction of the slope X as indicated by the arrow X by the screw 50. It is fried. The scum compressed and dehydrated as described above is discharged through the discharge chute 60.

駆動源５１は、図１に仮想線で示すように、スクレーパ３２側の例えば、前軸３５を直接駆動するように配置してもよい。
分離水槽９は、図４に示すように、浮上分離槽３内のスカム排出トラフ４７の下方空間を利用して槽と一体型に設置して装置全体のコンパクトを図るようにしてもよい。The drive source 51 may be disposed so as to directly drive, for example, the front shaft 35 on the scraper 32 side, as indicated by a virtual line in FIG.
As shown in FIG. 4, the separation water tank 9 may be installed integrally with the tank using the space below the scum discharge trough 47 in the floating separation tank 3 so as to make the entire apparatus compact.

左右の掻揚連動材（チェーン）４１間にはチェーンに垂直姿勢を保つようにスクレーパ本体４３が固定配備されていたが、図４および図５に示すように、左右の掻揚連動材４１間にスクレーパ軸４３ａを装架して前後に回転自在に垂下した状態でスクレーパ本体４３を設けてもよい。このスクレーパ本体４３は側面からみてくの字形に屈曲した板材を用いて図４に示すように掻揚受面３３ｂに沿って揚がるときはスクレーパ本体４３の線に直角な線に対し後倒れになりながら移動するものとする。その際のスクレーパ本体４３と掻揚受面３３ｂとの間の寸法ｈは、掻揚連動材４１に垂直な状態のスクレーパ本体４３の高さＨよりも小さいものとする。そうすればスクレーパ本体４３が掻揚受面３３ｂにきたときにスクレーパ本体４３の先に摩耗があったとしても常にスカムＳを掻き揚げることができるようになる。図５の右の部分に示すように、スクレーパ軸４３ａは、チェーンプレート４１ａから突設されたブラケット４１ｂを介して取り付けることもできる。また、図５に破線で示すように、スクレーパ本体４３の先部は連続したプレート面状でなく凹欠部４３ｂを多数配したものにしてもよい。スクレーパ本体４３は、図５において１枚ものになっているが、例えば、左右方向に分割した複数枚式にしてもよい。 The scraper body 43 is fixedly disposed between the left and right lifting interlocking members (chains) 41 so as to maintain a vertical posture in the chain. However, as shown in FIGS. Alternatively, the scraper body 43 may be provided in a state where the scraper shaft 43a is mounted on the scraper shaft 43a so as to be freely rotatable back and forth. When the scraper body 43 is lifted along the scraping receiving surface 33b as shown in FIG. 4 using a plate material bent in a square shape when viewed from the side, the scraper body 43 tilts backward with respect to a line perpendicular to the line of the scraper body 43. It shall move while. The dimension h between the scraper main body 43 and the lifting receiving surface 33b at that time is assumed to be smaller than the height H of the scraper main body 43 in a state perpendicular to the lifting interlocking member 41. If it does so, even if there is abrasion at the tip of the scraper main body 43 when the scraper main body 43 comes to the crawl receiving surface 33b, the scum S can be always lifted up. As shown in the right part of FIG. 5, the scraper shaft 43a can be attached via a bracket 41b protruding from the chain plate 41a. Further, as shown by a broken line in FIG. 5, the tip of the scraper main body 43 may not be a continuous plate surface but may have a large number of recessed portions 43b. Although the scraper body 43 is one in FIG. 5, for example, a plurality of scrapers may be divided in the left-right direction.

図６は、図４の実施形態のスクレーパ本体４３を板面状のものでなく、金属や樹脂などによりくの字折り曲げバー状のものにしたものである。図６のものは、共通なスクレーパ軸４３ａに多数本のスクレーパ本体４３を同調回転可能にぶら下げたものであるが、図７に示すようにスクレーパ本体４３を個別にぶら下げて構成してもよい。尚、スクレーパ本体４３の先端は、図７の右欄に示すようにＹ字形に形成してスカムをより細かく捕捉できるようにしてもよい。 FIG. 6 shows a scraper body 43 according to the embodiment shown in FIG. 4 that is not shaped like a plate surface, but is shaped like a dogleg bent bar made of metal or resin. In FIG. 6, a large number of scraper bodies 43 are suspended from a common scraper shaft 43a so as to be able to rotate synchronously. However, the scraper bodies 43 may be individually suspended as shown in FIG. The tip of the scraper main body 43 may be formed in a Y shape as shown in the right column of FIG. 7 so that the scum can be captured more finely.

図４ではスクレーパ本体４３が掻揚受面３３ｂに差し掛かって掻き揚げ過程に入る際掻揚連動材４１に対して後倒れ姿勢になるようにされていたが、図８に示すように、掻揚連動材４１に垂直にたれ下がった下回りの状態から掻き揚げの状態に示されるように掻揚連動材４１に対し後に７０度ないし８０度程度大きく倒れて掻きあがるように構成してもよい。そうすると、スクレーパ本体４３が垂直な掻き寄せ状態から掻揚受面３３ｂを揚がる距離Ｌの間にスクレーパ本体４３の先端はその数分の一（１／２〜１／３）の距離ｍしか動かないことになるため、その緩徐な動きの間にスカムから水分が流れ出してあとの脱水などの処理が軽減化されることになる。尚、同図に示すように、スカム排出トラフ４７の前板４７ｂからスクレーパ本体４３，４３間を通るようにしたスカム除去バー４７ｆを多数本設けておけばスクレーパ本体４３にスカムが付着したまま周回するような不都合がなくなる。 In FIG. 4, when the scraper main body 43 reaches the lifting receiving surface 33 b and enters the lifting process, the scraper main body 43 is in a backward-tilted posture with respect to the lifting interlocking member 41, but as shown in FIG. It may be configured such that the swooping-up interlocking material 41 is tilted down to about 70 to 80 degrees later and scraped up as shown in the state of scraping from the lower state where the interlocking member 41 hangs down vertically. Then, during the distance L in which the scraper main body 43 lifts the rake receiving surface 33b from the vertical scraping state, the tip of the scraper main body 43 moves only by a fraction (1/2 to 1/3) of the distance m. Therefore, moisture flows out from the scum during the slow movement, and the subsequent dehydration process is reduced. As shown in the figure, if a plurality of scum removal bars 47f are provided so as to pass between the scraper main bodies 43 and 43 from the front plate 47b of the scum discharge trough 47, the scum will circulate with the scum attached to the scraper main body 43. Such inconveniences are eliminated.

１…処理槽３…浮上分離槽４…供給水５…浮上誘導パイプ９…分離水槽１５…空気溶解装置１７…空気供給源１８…空気微細化部３２…スクレーパ３３…掻揚ガイド３３ａ…上端３３ｂ…掻揚受面４１…掻揚連動材４３…スクレーパ本体４７…スカム排出トラフ５０…スクリュウ６０…排出シュート。 DESCRIPTION OF SYMBOLS 1 ... Processing tank 3 ... Levitation separation tank 4 ... Supply water 5 ... Levitation guide pipe 9 ... Separation water tank 15 ... Air dissolution apparatus 17 ... Air supply source 18 ... Air refinement part 32 ... Scraper 33 ... Raising guide 33a ... Upper end 33b ... Screw receiving surface 41 ... Screw interlocking member 43 ... Scraper body 47 ... Scum discharge trough 50 ... Screw 60 ... Discharge chute.

Claims

A rectangular three-dimensional frame having a rectangular bottom wall and front, rear, left and right elevation walls that rise from each of the four sides of the bottom wall is formed, and a partition plate is raised at a position in front of the front vertical wall. A scum-containing sewage and air-dissolved water are introduced into the tank so as to maintain a certain level of water surface, and the scum can float on the water surface from the introduced water. An inclined lower end is located corresponding to the surface of the water in the separation tank, the inclined lower end is located at the upper end of the partition plate, and the upper end is inclined to extend from the upper end of the partition plate to the outside of the floating separation tank. A scum discharge guide, a scum discharge trough disposed outside the floating separation tank via the upper end of the rake guide, and a scum discharge trough provided in the scum discharge trough and provided with a dehydrating function and provided rotatably. Came up with a screw A scraper adapted to drive the cam toward the scum discharge trough and to be driven by a single drive source in conjunction with the screw. A front shaft located on the upper side, a rear shaft located on the water surface with the rear elevation wall, and an intermediate shaft disposed between the front shaft and the rear shaft, and both left and right ends of each shaft A pair of left and right rake-up interlocking members are hung through a sprocket provided on the base plate, and a plurality of scraper main bodies that circulate from the water surface through the rake guide are attached to these rake-up interlock members. flotation a above formula scum separation processing unit, said intermediate shaft and the intermediate sprocket, is its base with formed into bars bent shape of the wanted bend direction raked tip to掻揚interlocking member Multiple scraper bodies mounted so as to be able to rotate rearward are slanted vertically until the tip of the scraping guide reaches the tip of the scraper. The relative angle is gradually opened and the tip is placed on the lifting guide while being tilted back to within the range of 70 to 80 degrees. A pressure levitation type scum separation processing device, which is disposed near the upper side in the middle of the inclination direction of the lifting guide so as to perform a lifting operation with the tip on the lifting surface .