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JP4420488B2 - Mud draining device - Google Patents

Mud draining device Download PDF

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Publication number
JP4420488B2
JP4420488B2 JP13114399A JP13114399A JP4420488B2 JP 4420488 B2 JP4420488 B2 JP 4420488B2 JP 13114399 A JP13114399 A JP 13114399A JP 13114399 A JP13114399 A JP 13114399A JP 4420488 B2 JP4420488 B2 JP 4420488B2
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JP
Japan
Prior art keywords
sludge
pit
sedimentation basin
scraper
sludge pit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP13114399A
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Japanese (ja)
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JP2000317219A (en
Inventor
アップルクイスト ロッシュ
元彦 石野
Original Assignee
ウォーターリンク エイビー ジカート プロダクツ
旭テック環境ソリューション株式会社
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Priority to JP13114399A priority Critical patent/JP4420488B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、沈殿池の底面に堆積した汚泥を掻寄機により前記沈殿池の底面に設けられた汚泥ピットに掻き寄せ、その掻き寄せた汚泥を前記汚泥ピットから排出管を介して沈殿池の外に排出するようにした排泥装置に関する。
【0002】
【従来の技術】
従来、浄水場施設あるいは下水場施設等の水処理施設には、沈降性固形物を沈降分離するための沈殿池が設けられている。そして、その沈殿池には、底面に堆積した汚泥をその底面の一部に設けられた汚泥ピットに掻寄せるための掻寄機が設けられている。汚泥ピットは、その断面形状は逆円錐状に形成され、その汚泥ピットの最底部に開口している排出管を介して連続的に、又は間欠的に排出させるように構成されている。
【0003】
【発明が解決しようとする課題】
しかしながら、上記従来の排泥装置は、汚泥ピットから汚泥が排出される際、汚泥ピット中の汚泥に水の道が形成されるため、排出される汚泥の濃度が薄くなり、その後の汚泥処理の負荷が高くなるという欠点があった。
【0004】
図2を用いてさらに説明すると、沈殿池bの底面に堆積した汚泥が掻寄機20で汚泥ピット21に掻寄せられて、その汚泥ピット21が汚泥Sでほぼ満杯になると(図2(a)参照)、排出管22に設けられているバルブVが開けられる。
【0005】
バルブVの開により、汚泥ピット21の下部から汚泥Sが排出されるが、この排出の際、図2(b)に矢印で示されるように水の道が形成され、排出管22からは濃度の薄い汚泥が排出される結果となってしまう。したがって、その後の汚泥処理の負荷が増加するという欠点があるとともに、汚泥ピット21の壁面に付着した汚泥Sが徐々に固着してしまい、汚泥ピット21から排出されなくなるという欠点があった。
【0006】
そこで、本発明は、上記欠点を解決するためになされたものであって、その目的は、汚泥ピット内に水の道が形成されることなく、汚泥を効率よく排出できるようにした排泥装置を提供することにある。
【0007】
【課題を解決するための手段】
本発明は、上記目的を達成するために、沈殿池の底面に堆積した汚泥を掻寄機により前記沈殿池の底面に設けられた汚泥ピットに掻き寄せ、その掻き寄せた汚泥を前記汚泥ピットから排出管を介してその沈殿池外へ排出するようにした排泥装置において、前記汚泥ピットの上面を覆う多孔板を設けるとともに、前記多孔板の孔の総面積を前記排出管の孔の断面積よりも小さくし、前記掻寄機として、前記沈殿池の底面及び前記多孔板の上面を往復動する掻寄板を有する往復式掻寄機を備えたことを特徴としている。
【0008】
【発明の実施の形態】
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は、本発明に係る排泥装置の断面図である。沈殿池aは、一端側(図1では左側)から原水流入管1aを介して原水を受入れ、他端側に設けられている処理水流出管1bを介して処理水(上澄水)を排出できるように構成された、周知の横流式沈殿池の形状を呈している。
【0009】
沈殿池aの底面2は、ほぼ水平状の偏平な面に形成されていて、その底面2の原水受入側には、泥ピット(汚泥溜)3が設けられている。
【0010】
掻寄機4は、沈殿池aの底面2上に移動自在に載置された複数の掻寄板5a,5a…を有する。掻寄板5a,5a…は互いに所定の間隔をもって平行に設けられている。そして、各掻寄板5a,5a…は、周知の往復動式の掻寄機における掻寄板と同様に、沈殿池aの幅方向(原水の流れる方向と直交する方向)とほぼ等しい長さを有し、その断面形状(原水の流れる方向と平行、かつ垂直方向の断面形状)は、図示されるように、底辺が中央において浅く窪む凹面状をなし、他の二辺が凸面状をなす二等辺三角形を横転させた形状であって、底辺を汚泥ピット3側に向けた状態で、連結部材6に取付けられて掻寄機4が構成されている。
【0011】
掻寄機4の連結部材6には、リンク機構7が結合されている。リンク機構7は、モータMによる回転運動を、掻寄機4の往復運動に変換するもので、そのリンク機構7の連結棒7aの上端部は、モータMの回転数を所定の割合で減速する歯車式等の周知の減速機8に連結され、また、その連結棒7aの下端部は、沈殿池aの側壁に設けられた三角形状の転換部7bの一つの先端部に回動自在に連結されている。また、この転換部7bのもう一つの先端部は、沈殿池aの側壁に回動自在に支持され、転換部7bの残りの先端部には、他端部を掻寄機4の連結部材6に回動自在に連結された連結棒7cが回動自在に結合されている。したがって、連結棒7aが上下動すると、掻寄機4は、矢印丸1,丸2に示されるように、沈殿池aの底面2上を往復動することができる。
【0012】
図1中、10は、多孔板であって、汚泥ピット3の上面を覆うように、すなわち、底面2と同一面となるように設けられている。多孔板10のA部分が、左側の円A内に拡大して示されている。
【0013】
多孔板10に設けられている孔11,11…は、多孔板10を上面から見たとき、ほぼ均等に配置され、かつ、全ての孔11,11…の総面積は、汚泥ピット3の底部に開口している排出管12の孔の断面積よりも小さく設計されている。孔11の数は、多孔板10の大きさ、汚泥の種類あるいは汚泥の性質等によって適宜決められる。
【0014】
孔11,11…の総面積が排出管12の孔の断面積よりも小さくしてあるので、排出管12に設けられているバルブVが開けられて汚泥ピット3からの排泥が開始されると、多孔板10の孔11,11…に流速の速い流れが発生する。
【0015】
上記構成の排泥装置において、沈殿池aに原水が供給されて沈降分離が行われて底面2に汚泥が堆積すると、モータMが駆動され、リンク機構7を介して掻寄機4が往復動される。掻寄機4の往復動により底面2上に堆積している汚泥は汚泥ピット3側に移動され、その移動された汚泥は孔11,11…を介して汚泥ピット3内に導入される。
【0016】
次いで、排出管12のバルブVが開けられると、汚泥ピット3内の汚泥は排出管12を介して沈殿池外へ排出されるとともに、その排出に伴って孔11,11…を介して汚泥ピット3内に流速の速い流れが発生する。その速い流れにより、多孔板10上に堆積していた汚泥も効率よく汚泥ピット3内に引き抜かれるように導入されるとともに、汚泥ピット3内の汚泥もその汚泥ピット3に滞留することなく排出管12より排出される。
【0017】
そして、本発明においては、掻寄機4には、図1に示されるように、多孔板10上も摺動する掻寄板5aを備えたものが用いられている。したがって、汚泥を汚泥ピット3内に効果的に落下させることができる。
【0018】
汚泥ピット3内の汚泥の排出が終了した時点でバルブVが閉じられて汚泥の排出作業は終了となる。掻寄機4及びバルブVの駆動制御は、図示しない制御器により自動的に行われる。制御器には、必要に応じて沈殿池に設けられた汚泥の堆積状態を検出するセンサ等の検出信号が入力される。なお、汚泥ピット3内にわずかに汚泥が残存するように汚泥の排出を終了すると、高濃度の汚泥のみを沈殿池a外に排出することができる。
【0019】
【発明の効果】
本発明によれば、沈殿池の底面に堆積した汚泥を掻寄機により前記沈殿池の底面に設けられた汚泥ピットに掻き寄せ、その掻き寄せた汚泥を前記汚泥ピットから排出管を介してその沈殿池外へ排出するようにした排泥装置において、前記汚泥ピットの上面を覆う多孔板を設けるとともに、多孔板の孔の総面積を排出管の孔の断面積よりも小さくしたので、多孔板の孔に流速の速い流れが発生するため、その速い流れにより、多孔板上に堆積していた汚泥が効率よく汚泥ピット内に引き抜かれるように導入されるとともに、汚泥ピット内の汚泥も水の道が形成されることなく、すなわち、その汚泥ピットに滞留することなく排出管より排出される。また、前記掻寄機として、前記沈殿池の底面及び前記多孔板の上面を往復動する掻寄板を有する往復式掻寄機を備えたので、寄板により多孔板上に掻き寄せられた汚泥を汚泥ピット内に効果的に落下させることができる。従って、沈殿池から濃度の高い汚泥を効率よく排出することができる。
【図面の簡単な説明】
【図1】 本発明の一実施の形態に係る排泥装置の断面図である。
【図2】 従来の汚泥ピットからの排泥状態を説明するための説明図である。
【符号の説明】
1a 原水流入管
1b 処理水流出管

泥ピット(室)
寄機
5a 掻寄板
結部材
ンク機構
10 多孔板
11 孔
殿池
12 排出管
ルブ
[0001]
BACKGROUND OF THE INVENTION
In the present invention, the sludge accumulated on the bottom surface of the sedimentation basin is raked into a sludge pit provided on the bottom surface of the sedimentation basin by a scraper, and the scraped sludge is collected from the sludge pit through a discharge pipe to the sedimentation basin. The present invention relates to a mud discharge device that discharges outside.
[0002]
[Prior art]
Conventionally, a water treatment facility such as a water purification plant facility or a sewage plant facility has been provided with a sedimentation basin for settling and separating sedimentary solids. The sedimentation basin is provided with a scraper for scraping the sludge accumulated on the bottom surface to a sludge pit provided on a part of the bottom surface. The sludge pit has a cross-sectional shape formed in an inverted conical shape, and is configured to be discharged continuously or intermittently through a discharge pipe opened at the bottom of the sludge pit.
[0003]
[Problems to be solved by the invention]
However, when the sludge is discharged from the sludge pit, the conventional sludge apparatus described above forms a water path in the sludge in the sludge pit, so that the concentration of the discharged sludge is reduced, and the sludge treatment after that is performed. There was a drawback that the load was high.
[0004]
If it demonstrates further using FIG. 2, when the sludge accumulated on the bottom face of the sedimentation basin b is scraped by the scraper 20 to the sludge pit 21, and the sludge pit 21 will be almost filled with the sludge S (FIG. 2 (a )), The valve V provided in the discharge pipe 22 is opened.
[0005]
When the valve V is opened, the sludge S is discharged from the lower portion of the sludge pit 21. During this discharge, a water path is formed as indicated by an arrow in FIG. As a result, thin sludge is discharged. Accordingly, there is a drawback that the load of the subsequent sludge treatment increases, and the sludge S adhering to the wall surface of the sludge pit 21 is gradually fixed and is not discharged from the sludge pit 21.
[0006]
The present invention, which was made to solve the above drawbacks, and its object is such that the water way is formed in the sludge pit Ku was the sludge to be discharged efficiently discharge It is to provide a mud device.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention scrapes the sludge accumulated on the bottom surface of the sedimentation basin to the sludge pit provided on the bottom surface of the sedimentation basin by a scraper, and removes the sludge collected from the sludge pit. In the mud draining apparatus for discharging to the outside of the sedimentation basin through the discharge pipe, a perforated plate covering the upper surface of the sludge pit is provided, and the total area of the holes of the perforated plate is set to the sectional area of the holes of the discharge pipe The scraper is provided with a reciprocating scraper having a scraping plate that reciprocates the bottom surface of the sedimentation basin and the top surface of the porous plate.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a mud discharge apparatus according to the present invention. The sedimentation basin a can receive raw water from one end side (left side in FIG. 1) via the raw water inflow pipe 1a, and discharge treated water (supernatant water) via the treated water outflow pipe 1b provided on the other end side. The shape of the well-known cross-flow type sedimentation basin comprised as follows is exhibited.
[0009]
Bottom 2 of the settling tank a is be formed into a flat surface substantially horizontally, the raw water receiving side of the bottom 2, sludge pit (sludge reservoir) 3 is provided.
[0010]
The scraping machine 4 has a plurality of scraping plates 5a, 5a,... Which are movably mounted on the bottom surface 2 of the settling basin a. The scraping plates 5a, 5a... Are provided in parallel with each other at a predetermined interval. And each scraping plate 5a, 5a ... is the length substantially equal to the width direction (direction orthogonal to the flow direction of raw | natural water) of the sedimentation tank a similarly to the scraping plate in a known reciprocating type scraping machine. The cross-sectional shape (the cross-sectional shape in the direction perpendicular to and parallel to the flow direction of the raw water) has a concave shape in which the bottom is shallowly depressed in the center, and the other two sides are convex. The scraper 4 is configured by being attached to the connecting member 6 in a state in which the isosceles triangle formed is rolled over, with the bottom side facing the sludge pit 3 side.
[0011]
A link mechanism 7 is coupled to the connecting member 6 of the scraper 4. The link mechanism 7 converts the rotational motion by the motor M into the reciprocating motion of the scraper 4, and the upper end of the connecting rod 7a of the link mechanism 7 decelerates the rotational speed of the motor M at a predetermined rate. It is connected to a well-known speed reducer 8 such as a gear type, and the lower end portion of the connecting rod 7a is rotatably connected to one tip portion of a triangular conversion portion 7b provided on the side wall of the settling basin a. Has been. Further, the other tip portion of the conversion portion 7b is rotatably supported on the side wall of the settling basin a, and the other end portion of the conversion portion 7b is connected to the connecting member 6 of the scraper 4 at the other end portion. A connecting rod 7c that is pivotably coupled to each other is rotatably coupled. Therefore, when the connecting rod 7a moves up and down, the scraper 4 can reciprocate on the bottom surface 2 of the settling basin a, as indicated by arrows 1 and 2.
[0012]
In FIG. 1, reference numeral 10 denotes a perforated plate, which is provided so as to cover the upper surface of the sludge pit 3, that is, to be flush with the bottom surface 2. A portion A of the perforated plate 10 is shown enlarged in a circle A on the left side.
[0013]
The holes 11, 11... Provided in the perforated plate 10 are arranged substantially evenly when the perforated plate 10 is viewed from the upper surface, and the total area of all the holes 11, 11. It is designed to be smaller than the cross-sectional area of the hole of the discharge pipe 12 that is open to the bottom. The number of holes 11 is appropriately determined depending on the size of the perforated plate 10, the type of sludge, the nature of the sludge, and the like.
[0014]
Since the total area of the holes 11, 11... Is smaller than the cross-sectional area of the hole of the discharge pipe 12, the valve V provided in the discharge pipe 12 is opened and the mud from the sludge pit 3 is started. Then, a flow having a high flow velocity is generated in the holes 11 of the perforated plate 10.
[0015]
When the raw water is supplied to the sedimentation basin a, the sedimentation separation is performed, and the sludge is accumulated on the bottom surface 2, the motor M is driven and the scraper 4 reciprocates via the link mechanism 7. Is done. The sludge accumulated on the bottom surface 2 by the reciprocating motion of the scraper 4 is moved to the sludge pit 3 side, and the moved sludge is introduced into the sludge pit 3 through the holes 11, 11.
[0016]
Next, when the valve V of the discharge pipe 12 is opened, the sludge in the sludge pit 3 is discharged out of the sedimentation basin through the discharge pipe 12, and along with the discharge, the sludge pit through the holes 11, 11,. 3 has a high flow velocity. Due to the fast flow, the sludge accumulated on the perforated plate 10 is introduced so as to be efficiently extracted into the sludge pit 3, and the sludge in the sludge pit 3 does not stay in the sludge pit 3 and is discharged from the discharge pipe. 12 is discharged.
[0017]
In the present invention, the scraping machine 4 is provided with a scraping plate 5a that slides on the perforated plate 10 as shown in FIG. Therefore, Ru can be effectively dropped sludge into the sludge pit 3.
[0018]
When the discharge of the sludge in the sludge pit 3 is finished, the valve V is closed and the sludge discharge operation is finished. The drive control of the scraper 4 and the valve V is automatically performed by a controller (not shown). A detection signal from a sensor or the like that detects the accumulation state of sludge provided in the settling basin is input to the controller as necessary. When the sludge discharge is finished so that the sludge remains slightly in the sludge pit 3, only the high-concentration sludge can be discharged out of the sedimentation tank a.
[0019]
【The invention's effect】
According to the present invention, the sludge accumulated on the bottom surface of the sedimentation basin is raked into a sludge pit provided on the bottom surface of the sedimentation basin by a scraper, and the scraped sludge is removed from the sludge pit via a discharge pipe. In the mud discharge device that discharges outside the sedimentation basin, a porous plate that covers the upper surface of the sludge pit is provided, and the total area of the holes of the porous plate is made smaller than the sectional area of the holes of the discharge pipe. As a result, a flow with a high flow velocity is generated in the holes of the slag, so that the sludge accumulated on the perforated plate is introduced by the fast flow efficiently into the sludge pit, and the sludge in the sludge pit is also water. It is discharged from the discharge pipe without forming a road, that is, without staying in the sludge pit. Further, as the raking machine, because with a reciprocating raking machine having a raking plate reciprocating bottom and upper surface of the perforated plate of the settling tank was scraped onto a perforated plate by the take Yadorikiban Sludge can be effectively dropped into the sludge pit. Therefore, Ru can be discharged efficiently with high concentration sludge from the settling basin.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a mud discharge apparatus according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram for explaining the state of mud discharged from a conventional sludge pit.
[Explanation of symbols]
1a water inlet pipe 1b treated water outlet pipe 2 bottom surface <br/> 3 sludge pit (chamber)
4 take-preferred machine 5a raking plate 6 Consolidated member 7 link mechanism 10 a perforated plate 11 holes
a precipitation Shingarichi 12 discharge pipe V valves

Claims (1)

沈殿池の底面に堆積した汚泥を掻寄機により前記沈殿池の底面に設けられた汚泥ピットに掻き寄せ、その掻き寄せた汚泥を前記汚泥ピットから排出管を介してその沈殿池外へ排出するようにした排泥装置において、
前記汚泥ピットの上面を覆う多孔板を設けるとともに、
その多孔板の孔の総面積を前記排出管の孔の断面積よりも小さくし、
前記掻寄機として、前記沈殿池の底面及び前記多孔板の上面を往復動する掻寄板を有する往復式掻寄機を備えたこと、
を特徴とする排泥装置。
The sludge accumulated on the bottom surface of the sedimentation basin is raked into the sludge pit provided on the bottom surface of the sedimentation basin by a scraper, and the scraped sludge is discharged from the sludge pit to the outside of the sedimentation basin through the discharge pipe. In the drainage device
While providing a perforated plate covering the upper surface of the sludge pit,
The total area of the holes of the perforated plate is smaller than the cross-sectional area of the holes of the discharge pipe,
As the scraper, comprising a reciprocating scraper having a scraping plate that reciprocates the bottom surface of the sedimentation basin and the top surface of the porous plate,
A mud drainage device.
JP13114399A 1999-05-12 1999-05-12 Mud draining device Expired - Lifetime JP4420488B2 (en)

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Application Number Priority Date Filing Date Title
JP13114399A JP4420488B2 (en) 1999-05-12 1999-05-12 Mud draining device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13114399A JP4420488B2 (en) 1999-05-12 1999-05-12 Mud draining device

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Publication Number Publication Date
JP2000317219A JP2000317219A (en) 2000-11-21
JP4420488B2 true JP4420488B2 (en) 2010-02-24

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* Cited by examiner, † Cited by third party
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JP2001062207A (en) * 1999-08-31 2001-03-13 Asahi Tec Corp Sludge discharger for settling basin
JP2002219499A (en) * 2001-01-25 2002-08-06 Asahi Tec Corp Scraper for sludge thickener
JP4530551B2 (en) * 2001-01-26 2010-08-25 旭テック環境ソリューション株式会社 Scraper
JP3898030B2 (en) * 2001-11-09 2007-03-28 旭テック株式会社 Sedimentation basin scraper
JP2003326108A (en) * 2002-05-13 2003-11-18 Asahi Tec Corp Sedimentation apparatus
KR100990987B1 (en) 2009-04-08 2010-10-29 다음기술 주식회사 Sludge collector system for hopper-gate
CN114133064B (en) * 2021-11-25 2023-11-24 海盐时雨金属科技有限公司 Metal sewage treatment device

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