JP2022061241A - Floating material recovery device - Google Patents

Floating material recovery device Download PDF

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JP2022061241A
JP2022061241A JP2020169124A JP2020169124A JP2022061241A JP 2022061241 A JP2022061241 A JP 2022061241A JP 2020169124 A JP2020169124 A JP 2020169124A JP 2020169124 A JP2020169124 A JP 2020169124A JP 2022061241 A JP2022061241 A JP 2022061241A
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treated water
water
treated
floating material
recovery device
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広志 丹下
Hiroshi Tange
泰之 杉野
Yasuyuki Sugino
功治 間島
Koji Mashima
仁人 細谷
Jinto Hosoya
正道 大下
Masamichi Oshita
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Shinko Pantec Co Ltd
Chugoku Electric Power Co Inc
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Chugoku Electric Power Co Inc
Kobelco Eco Solutions Co Ltd
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Priority to JP2020169124A priority Critical patent/JP2022061241A/en
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Abstract

To provide a floating material recovery device capable of suppressing a water flow of an entire surface of treated water and the agitation of the treated water.SOLUTION: A floating material recovery device 30 that collects a floating material floating on a water surface of treated water 2 in a treated water tank 10 includes: a damping plate 31 fixed in an upright state on an outer peripheral portion of the water surface of the treated water 2; a water flow generator 32 installed in the treated water 2 on one side of the damming plate 31 to generate a circumferential water flow on the water surface of the treated water 2; and a recovery pump 33 installed in the treated water 2 on the other side of the damming plate 31 and sucking up the treated water 2.SELECTED DRAWING: Figure 1

Description

本発明は、処理水槽内の水面に浮遊した浮遊物を回収する浮遊物回収装置に関する。 The present invention relates to a floating material recovery device that collects floating materials floating on the water surface in a treated water tank.

特許文献１には、スクレーパを円形沈殿池内の処理水の水面に沿って旋回させることによって、水面に浮いたスカムを水面上のスカム除去装置に掻き寄せる技術が開示されている。
特許文献２には、スクレーパを円形沈殿池内の処理水の水面に沿って旋回させることによって、水面に浮いたスカムを外径方向に掻き集めて、円形沈殿池の内周壁に設けられたスカム除去装置に誘導する技術が開示されている。 Patent Document 1 discloses a technique in which a scraper is swirled along the water surface of treated water in a circular settling pond to attract scum floating on the water surface to a scum removing device on the water surface.
In Patent Document 2, a scraper is swirled along the water surface of the treated water in the circular settling basin to collect scum floating on the water surface in the outer diameter direction, and a scum removing device provided on the inner peripheral wall of the circular settling basin. The technology to guide to is disclosed.

特開２００２－００１３２３号公報Japanese Unexamined Patent Publication No. 2002-001323 実登第２５４４２５８号公報Jitsuto No. 2544258 Gazette

ところで、特許文献１，２の技術では、スクレーパが径方向に設けられていることから、処理水槽の水面全体がスクレーパによって掻かれる。そのため、周方向の水流が水面全体に発生する虞があり、処理水が攪拌されてしまって、沈殿物が処理水に分散してしまう。 By the way, in the techniques of Patent Documents 1 and 2, since the scraper is provided in the radial direction, the entire water surface of the treated water tank is scratched by the scraper. Therefore, there is a possibility that a water flow in the circumferential direction is generated on the entire water surface, the treated water is agitated, and the precipitate is dispersed in the treated water.

そこで、本発明は、上記事情に鑑みてなされたものであって、処理水の水面全体の水流及び処理水の攪拌を抑えられる浮遊物回収装置を提供することを目的とする。 Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a floating material recovery device capable of suppressing the water flow of the entire water surface of the treated water and the agitation of the treated water.

以上の課題を解決するために、処理水槽内の処理水の水面に浮遊した浮遊物を回収する浮遊物回収装置は、前記処理水の水面の外周部分に立てられた状態で固定された堰き止めプレートと、前記堰き止めプレートの一方の面の側において前記処理水中に設置され、前記処理水の水面に周方向の水流を発生させる水流発生器と、前記堰き止めプレートの他方の面の側において前記処理水中に設置され、前記処理水を吸い上げる回収ポンプと、を備える。
好ましくは、前記堰き止めプレートはその両面が周方向に向いて設置されている。
好ましくは、前記堰き止めプレートは一部が前記処理水に浸かり、一部が前記処理水の水面から突き出ている。 In order to solve the above problems, the floating material recovery device that collects the suspended matter floating on the surface of the treated water in the treated water tank is a dam that is fixed in a state of being erected on the outer peripheral portion of the water surface of the treated water. A water flow generator installed in the treated water on one side of the plate and the damming plate to generate a circumferential water flow on the water surface of the treated water, and on the other side of the damming plate. It is provided with a recovery pump which is installed in the treated water and sucks up the treated water.
Preferably, both sides of the damming plate are installed so as to face the circumferential direction.
Preferably, the damming plate is partially immersed in the treated water and partly protrudes from the surface of the treated water.

以上によれば、堰き止めプレートが処理水槽内の水面の外周部分に立てられた状態に設置され、その堰き止めプレートの一方の面の側に水流発生器が設置されているため、処理水の水面のうち外周部分には水流が発生するが、中央部分には水流が発生しない。そのため、処理水の攪拌及び沈殿物の分散を抑えることができる。
また、浮遊物が水流発生器によって堰き止めプレートに集められ、集められた浮遊物が処理水とともに回収ポンプによって回収されるため、浮遊物を効率よく回収することができる。 According to the above, the damming plate is installed in a state of being erected on the outer peripheral portion of the water surface in the treated water tank, and the water flow generator is installed on one side of the damming plate, so that the treated water is treated. A water flow is generated in the outer peripheral part of the water surface, but no water flow is generated in the central part. Therefore, it is possible to suppress the stirring of the treated water and the dispersion of the precipitate.
Further, since the suspended matter is collected on the damming plate by the water flow generator and the collected suspended matter is collected by the recovery pump together with the treated water, the suspended matter can be efficiently recovered.

本発明の実施形態によれば、処理水の攪拌及び沈殿物の分散を抑えることができるとともに、浮遊物を効率よく回収することができる。 According to the embodiment of the present invention, the stirring of the treated water and the dispersion of the precipitate can be suppressed, and the suspended matter can be efficiently recovered.

沈殿設備の縦断面図である。It is a vertical sectional view of a settling facility. 沈殿設備の平面図である。It is a top view of the settling equipment.

以下、図面を参照して、本発明の実施形態について説明する。以下に述べる実施形態には、本発明を実施するために技術的に好ましい種々の限定が付されている。本発明の範囲を以下の実施形態及び図示例に限定するものではない。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are provided with various technically preferred limitations for carrying out the present invention. The scope of the present invention is not limited to the following embodiments and illustrated examples.

図１は、沈殿設備１の断面図である。図２は、沈殿設備１の平面図である。
この沈殿設備１は、処理水槽１０、歩廊１６、センターウェル１７、沈殿物掻寄機２０及び浮遊物回収装置３０を備える。 FIG. 1 is a cross-sectional view of the settling equipment 1. FIG. 2 is a plan view of the settling equipment 1.
The settling facility 1 includes a treatment water tank 10, a corridor 16, a center well 17, a settling machine 20, and a floating material recovery device 30.

処理水槽１０は、上側が開放された円柱状の空間を内側に有した円形の処理水槽であって、沈殿池とも称呼される。処理水槽１０の底１１の中央には、沈殿物ピット１３が凹設されている。処理水槽１０の内周壁１２の上部には越流堰１４が設けられ、越流堰１４の内側にはバッフルプレート１５が設けられている。処理水槽１０の上方には、歩廊１６が設置されている。バッフルプレート１５及び越流堰１４を越流した処理水２は再利用される。本実施形態では、再利用される処理水２中の浮遊物の含有率は浮遊物回収装置３０によって低く抑えられるため、再利用先での浮遊物の詰まりが防止される。 The treatment water tank 10 is a circular treatment water tank having a columnar space with an open upper side inside, and is also called a settling basin. A sediment pit 13 is recessed in the center of the bottom 11 of the treatment water tank 10. An overflow weir 14 is provided above the inner peripheral wall 12 of the treatment water tank 10, and a baffle plate 15 is provided inside the overflow weir 14. A corridor 16 is installed above the treatment water tank 10. The treated water 2 that has overflowed the baffle plate 15 and the overflow weir 14 is reused. In the present embodiment, the content of suspended matter in the treated water 2 to be reused is suppressed to a low level by the floating matter recovery device 30, so that clogging of the suspended matter at the reused destination is prevented.

処理水槽１０の上部の中央には、整流筒としてのセンターウェル１７が固定されている。処理水供給管１８がセンターウェル１７に連結され、処理水が処理水供給管１８を通じてセンターウェル１７に供給されて、処理水槽１０に貯留される。処理水槽１０に貯留される処理水２は沈殿対象物（例えば石炭）及び凝集剤を含有する。沈殿対象物が凝集剤により凝集して、その凝集物が処理水槽１０内にて沈殿する。以下、底１１に沈殿する物質を沈殿物という。また、処理水２は比重の軽い浮遊物（例えば、木質ペレット、木質ペレットの破砕片、木屑、スカム等）を含有し、その浮遊物は処理水槽１０内の処理水２の水面に浮上する。なお、処理水２は、石炭及び木質ペレットを搬送するベルトコンベヤを水洗することによって得られた汚水に凝集剤を混入させたものであるが、これに限るものではない。 A center well 17 as a rectifying cylinder is fixed in the center of the upper part of the treatment water tank 10. The treated water supply pipe 18 is connected to the center well 17, and the treated water is supplied to the center well 17 through the treated water supply pipe 18 and stored in the treated water tank 10. The treated water 2 stored in the treated water tank 10 contains a settling object (for example, coal) and a flocculant. The object to be precipitated is aggregated by the flocculant, and the aggregate is precipitated in the treated water tank 10. Hereinafter, the substance that precipitates on the bottom 11 is referred to as a precipitate. Further, the treated water 2 contains suspended matter having a light specific gravity (for example, wood pellets, crushed pieces of wood pellets, wood chips, scum, etc.), and the suspended matter floats on the water surface of the treated water 2 in the treated water tank 10. The treated water 2 is obtained by mixing a flocculant with sewage obtained by washing a belt conveyor for transporting coal and wood pellets with water, but the treatment water 2 is not limited to this.

沈殿物掻寄機２０は駆動機２１、回転軸２２及びレーキ２３を有する。回転軸２２が処理水槽１０の中央において鉛直方向に延び、回転軸２２の下端が沈殿物ピット１３の底に回転可能に連結され、回転軸２２の上端が駆動機２１に連結されている。レーキ２３が回転軸２２の下部から径方向外側へ処理水槽１０の底１１に沿って延設されており、レーキ２３の掻き板が径方向及び周方向に対して斜めに設けられている。そのため、駆動機２１によってレーキ２３が回転軸２２回りに旋回させられると、処理水槽１０の底１１に沈殿した沈殿物がレーキ２３によって底１１の中央の沈殿物ピット１３へ掻き寄せられる。沈殿物ピット１３には抜出管１９が連結されており、沈殿物ピット１３内の沈殿物が不図示の引抜ポンプによって抜出管１９を通って抜き出される。抜き出された沈殿物が処理水から分離されて、分離された処理水は再利用されるべく、センターウェル１７に供給される。 The sediment scraper 20 has a drive machine 21, a rotary shaft 22, and a rake 23. The rotary shaft 22 extends vertically in the center of the treatment water tank 10, the lower end of the rotary shaft 22 is rotatably connected to the bottom of the sediment pit 13, and the upper end of the rotary shaft 22 is connected to the drive machine 21. The rake 23 extends radially outward from the lower part of the rotating shaft 22 along the bottom 11 of the treatment water tank 10, and the scraping plate of the rake 23 is provided diagonally with respect to the radial direction and the circumferential direction. Therefore, when the rake 23 is swiveled around the rotation shaft 22 by the drive machine 21, the sediment settled on the bottom 11 of the treatment water tank 10 is scraped by the rake 23 to the settling pit 13 in the center of the bottom 11. An extraction pipe 19 is connected to the sediment pit 13, and the sediment in the sediment pit 13 is extracted through the extraction pipe 19 by an extraction pump (not shown). The extracted precipitate is separated from the treated water, and the separated treated water is supplied to the center well 17 for reuse.

図２に示すように、２体の浮遊物回収装置３０は処理水槽１０の中央を挟んで互いに対向する位置に配置されている。但し、処理水槽１０内に設置される浮遊物回収装置３０の数が単数であってもよいし、３体以上の浮遊物回収装置３０が処理水槽１０内に周方向に所定間隔で配置されていてもよい。浮遊物回収装置３０は、堰き止めプレート３１、水流発生器３２及び回収ポンプ３３を備える。 As shown in FIG. 2, the two floating material recovery devices 30 are arranged at positions facing each other with the center of the treatment water tank 10 interposed therebetween. However, the number of floating material recovery devices 30 installed in the treated water tank 10 may be singular, or three or more floating material recovery devices 30 are arranged in the treated water tank 10 at predetermined intervals in the circumferential direction. You may. The floating material recovery device 30 includes a damming plate 31, a water flow generator 32, and a recovery pump 33.

堰き止めプレート３１は、例えば処理水槽１０の内周壁１２、越流堰１４又はバッフルプレート１５に取り付けられることによって、処理水槽１０内の処理水２の水面の外周部分に立てた状態で固定されている。堰き止めプレート３１の一部が処理水２に浸かっており、堰き止めプレート３１の残りの部分が処理水２の水面から上に突き出ている。堰き止めプレート３１はその板厚方向が処理水槽１０の周方向になるように設置され、堰き止めプレート３１の両面が周方向に向けられている。 The damming plate 31 is fixed to the outer peripheral portion of the water surface of the treated water 2 in the treated water tank 10 in an upright state by being attached to the inner peripheral wall 12, the overflow weir 14 or the baffle plate 15 of the treated water tank 10, for example. There is. A part of the damming plate 31 is immersed in the treated water 2, and the remaining part of the damming plate 31 protrudes upward from the water surface of the treated water 2. The damming plate 31 is installed so that its thickness direction is the circumferential direction of the treatment water tank 10, and both sides of the damming plate 31 are oriented in the circumferential direction.

堰き止めプレート３１の一方の面の側において、水流発生器３２が処理水２中の水面近傍に設置され、堰き止めプレート３１の他方の面の側において、回収ポンプ３３が処理水２中の水面近傍に設置されている。 A water flow generator 32 is installed near the water surface in the treated water 2 on one side of the damming plate 31, and a recovery pump 33 is placed on the water surface in the treated water 2 on the other side of the damming plate 31. It is installed in the vicinity.

水流発生器３２は、例えば処理水槽１０の内周壁１２、越流堰１４若しくはバッフルプレート１５又は堰き止めプレート３１に取り付けられることによって、固定されている。水流発生器３２は、インペラ及びインペラを回転させる動力源等を有し、処理水２の水面に周方向の水流を発生させる。処理水２の水面に浮いた浮遊物は水流によって周方向に流れて、堰き止めプレート３１に堰き止められる。従って、浮遊物は、堰き止めプレート３１の他方の面の側に寄せ集められる。 The water flow generator 32 is fixed by being attached to, for example, the inner peripheral wall 12, the overflow weir 14, the baffle plate 15, or the damming plate 31 of the treatment water tank 10. The water flow generator 32 has an impeller, a power source for rotating the impeller, and the like, and generates a water flow in the circumferential direction on the water surface of the treated water 2. The floating matter floating on the water surface of the treated water 2 flows in the circumferential direction by the water flow and is dammed by the damming plate 31. Therefore, the suspended matter is gathered toward the other side of the damming plate 31.

回収ポンプ３３にはフロート３３ａが取り付けられ、フロート３３ａによって回収ポンプ３３が浮遊している。回収ポンプ３３は水流発生器３２による水流によって水流発生器３２から離れる方向に流れて、堰き止めプレート３１の他方の面に受け止められる。回収ポンプ３３はホース３４等を介して沈殿物捕捉器に接続されている。回収ポンプ３３は、処理水２を吸い上げて、沈殿物捕捉器へ送る。沈殿物捕捉器は浸透性の捕集袋等を有し、処理水２中の浮遊物が沈殿物捕捉器の捕集袋に捕捉されることで、処理水２から分離される。浮遊物が除去された処理水２は沈殿物捕捉器の捕集袋を浸透して、再利用される。 A float 33a is attached to the recovery pump 33, and the recovery pump 33 is suspended by the float 33a. The recovery pump 33 flows in a direction away from the water flow generator 32 due to the water flow by the water flow generator 32, and is received by the other surface of the damming plate 31. The recovery pump 33 is connected to the sediment catcher via a hose 34 or the like. The recovery pump 33 sucks up the treated water 2 and sends it to the sediment trap. The sediment catcher has a permeable collection bag or the like, and the suspended matter in the treated water 2 is captured by the collection bag of the sediment trap and separated from the treated water 2. The treated water 2 from which the suspended matter has been removed permeates the collection bag of the sediment trap and is reused.

なお、回収ポンプ３３は、周方向において、堰き止めプレート３１に関して水流発生器３２の反対側に設置されているのであれば、フロートポンプでなくてもよい。つまり、回収ポンプ３３は、例えば処理水槽１０の内周壁１２、越流堰１４若しくはバッフルプレート１５又は堰き止めプレート３１に取り付けられることによって、固定されていてもよい。 The recovery pump 33 does not have to be a float pump as long as it is installed on the opposite side of the water flow generator 32 with respect to the damming plate 31 in the circumferential direction. That is, the recovery pump 33 may be fixed by being attached to, for example, the inner peripheral wall 12, the overflow weir 14, the baffle plate 15, or the weir blocking plate 31 of the treatment water tank 10.

以上のように浮遊物が水流発生器３２によって堰き止めプレート３１に集められ、集められた浮遊物が処理水２とともに回収ポンプ３３によって回収されるため、浮遊物を効率よく回収することができる。つまり、回収ポンプ３３の吸込能力が低くても、また回収ポンプ３３の設置数が少なくても、処理水槽１０内の処理水２の水面全体的に浮遊物を回収することができる。 As described above, the suspended matter is collected on the damming plate 31 by the water flow generator 32, and the collected suspended matter is collected by the recovery pump 33 together with the treated water 2, so that the suspended matter can be efficiently recovered. That is, even if the suction capacity of the recovery pump 33 is low or the number of recovery pumps 33 installed is small, suspended matter can be recovered on the entire surface of the treated water 2 in the treated water tank 10.

処理水２の水面に浮いた浮遊物が回収されるため、処理水２の上澄みを再利用しやく、特にバッフルプレート１５及び越流堰１４を越流した処理水２を再利用しやすい。具体的には、再利用先での浮遊物の詰まりが防止されるとともに、処理水２の再利用に際しての安全性も向上する。 Since the floating matter floating on the water surface of the treated water 2 is recovered, the supernatant of the treated water 2 can be easily reused, and in particular, the treated water 2 overflowing the baffle plate 15 and the overflow weir 14 can be easily reused. Specifically, clogging of suspended matter at the reuse destination is prevented, and safety when reusing the treated water 2 is also improved.

水流発生器３２は処理水２の水面に水流を発生させるが、底１１の近傍には水流を発生させない。また、水流発生器３２が処理水槽１０内の処理水２の水面の外周部分に設置されていることから、処理水２の水面のうち外周部分には水流が発生し、中央部分には水流が発生しない。そのため、処理水２の攪拌及び沈殿物の分散が発生しない。 The water flow generator 32 generates a water flow on the water surface of the treated water 2, but does not generate a water flow in the vicinity of the bottom 11. Further, since the water flow generator 32 is installed on the outer peripheral portion of the water surface of the treated water 2 in the treated water tank 10, a water flow is generated on the outer peripheral portion of the water surface of the treated water 2, and the water flow is generated in the central portion. Does not occur. Therefore, stirring of the treated water 2 and dispersion of the precipitate do not occur.

沈殿設備１において沈殿物のみならず、浮遊物も処理水２から分離できることから、この沈殿設備１を含む全体設備の管理費用及び運用費用の低減を図れる。 Since not only the sediment but also the suspended matter can be separated from the treated water 2 in the settling facility 1, it is possible to reduce the management cost and the operating cost of the entire facility including the settling facility 1.

２…処理水
１０…処理水槽
３０…浮遊物回収装置
３１…堰き止めプレート
３２…水流発生器
３３…回収ポンプ 2 ... Treated water 10 ... Treated water tank 30 ... Floating material recovery device 31 ... Damping plate 32 ... Water flow generator 33 ... Recovery pump

Claims (3)

処理水槽内の処理水の水面に浮遊した浮遊物を回収する浮遊物回収装置であって、
前記処理水の水面の外周部分に立てられた状態で固定された堰き止めプレートと、
前記堰き止めプレートの一方の面の側において前記処理水中に設置され、前記処理水の水面に周方向の水流を発生させる水流発生器と、
前記堰き止めプレートの他方の面の側において前記処理水中に設置され、前記処理水を吸い上げる回収ポンプと、を備える浮遊物回収装置。 A floating material recovery device that collects suspended matter floating on the surface of the treated water in the treated water tank.
A damming plate fixed in an upright position on the outer peripheral portion of the surface of the treated water,
A water flow generator installed in the treated water on one side of the damming plate to generate a circumferential water flow on the water surface of the treated water.
A floating material recovery device provided with a recovery pump installed in the treated water on the other side of the damming plate and sucking up the treated water. 前記堰き止めプレートはその両面が周方向に向いて設置されている
請求項１に記載の浮遊物回収装置。 The floating material recovery device according to claim 1, wherein the damming plate is installed with both sides facing the circumferential direction. 前記堰き止めプレートは一部が前記処理水に浸かり、一部が前記処理水の水面から突き出ている
請求項１又は２に記載の浮遊物回収装置。 The floating material recovery device according to claim 1 or 2, wherein the damming plate is partially immersed in the treated water and partly protrudes from the water surface of the treated water.
JP2020169124A 2020-10-06 2020-10-06 Floating material recovery device Pending JP2022061241A (en)

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