JPH09299713A - Sludge rake-up device in precipitator - Google Patents
Sludge rake-up device in precipitatorInfo
- Publication number
- JPH09299713A JPH09299713A JP11656496A JP11656496A JPH09299713A JP H09299713 A JPH09299713 A JP H09299713A JP 11656496 A JP11656496 A JP 11656496A JP 11656496 A JP11656496 A JP 11656496A JP H09299713 A JPH09299713 A JP H09299713A
- Authority
- JP
- Japan
- Prior art keywords
- sludge
- rake
- drive shaft
- settling tank
- rake arm
- 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.)
- Pending
Links
Landscapes
- Treatment Of Sludge (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、廃水処理における
沈澱槽において、その底部に沈澱した汚泥を中央底部の
集泥ピットに掻き寄せる汚泥掻寄機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge scraper for scraping sludge settling at the bottom of a settling tank in wastewater treatment to a sludge collecting pit at the center bottom.
【０００２】[0002]
【従来の技術】たとえば、公共下水道、温泉排水、工場
排水などの各種の廃水（以下、単に「汚水」という）を
処理する汚水処理設備においては、一般に汚水を上澄液
と汚泥に分離する沈澱槽を備えており、この沈澱槽に
は、底部に沈澱した汚泥を集泥ピットに掻き寄せるいわ
ゆる汚泥掻寄機が設置されている。2. Description of the Related Art For example, in a wastewater treatment facility for treating various kinds of wastewater (hereinafter simply referred to as "sewage") such as public sewerage, hot spring wastewater, factory wastewater, etc., generally, sedimentation that separates wastewater into supernatant liquid and sludge The settling tank is equipped with a so-called sludge scraper that scrapes sludge settling at the bottom into the sludge collecting pit.
【０００３】汚泥掻寄機は、汚泥を掻き寄せるために十
分に高い強度が必要であることから、従来、金属材料に
よって製作されている。一方、この汚泥掻寄機は、汚水
と長時間接触していること、および汚水には酸素、酸性
物質、酸化剤など多種類の腐食に関与する物質が含まれ
ていることから、耐食性が問題となっている。The sludge scraper is conventionally made of a metal material because it needs a sufficiently high strength to scrape the sludge. On the other hand, this sludge scraper is in contact with sewage for a long time, and sewage contains various types of substances such as oxygen, acidic substances, and oxidizers that are involved in corrosion. Has become.
【０００４】そこで、従来からＳＳ材にタールエポキシ
塗装を施して、腐食防止効果を高めた鋼材を主に用いて
いた。また、腐食する可能性がさらに高い汚泥掻寄機の
場合、たとえば酸性度の高い温泉の排水処理設備におけ
る汚泥掻寄機では、たとえばＳＵＳ３０４鋼を使用する
こともある。Therefore, conventionally, a steel material has been mainly used in which the SS material is coated with tar epoxy to improve the corrosion prevention effect. Further, in the case of a sludge scraper that is more likely to be corroded, for example, in a sludge scraper in a hot water drainage treatment facility with high acidity, for example, SUS304 steel may be used.
【０００５】[0005]
【発明が解決しようとする課題】ＳＳ材にタールエポキ
シ塗装した材料は、必ずしも十分な耐食性を示さず、し
たがって約２年に１回程度の割合で再塗装する必要があ
るのに対して、ＳＵＳ３０４鋼を使用する場合には、全
般的に高い耐食性を示す。The material obtained by coating the SS material with the tar epoxy does not always show sufficient corrosion resistance, and therefore, it is necessary to recoat the material once in about two years, whereas SUS304. When steel is used, it generally has high corrosion resistance.
【０００６】しかし、ＳＵＳ３０４鋼を使用する場合に
は、材料コストが嵩むばかりでなく、これとても対応で
きない腐食性の高い汚水例、特に海水が混入する公共下
水道、温泉排水、ＰＨが低い工場排水の処理例が多くな
っている。However, when SUS304 steel is used, not only the material cost increases, but also highly corrosive sewage that cannot be coped with, especially public sewer mixed with seawater, hot spring drainage, and factory drainage with low PH are used. There are many examples of processing.
【０００７】さらに、従来例のいずれも金属材料を用い
ているために、重量的に重く、回転駆動動力費および据
え付けコストが嵩む。Further, since all of the conventional examples use a metal material, they are heavy in weight, and the rotational driving power cost and the installation cost increase.
【０００８】したがって、本発明の主たる課題は、耐食
性に優れ、軽量化させることにより運転動力費の低減を
図ることにある。[0008] Therefore, the main object of the present invention is to reduce the operating power cost by excellent corrosion resistance and weight saving.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決した本発
明は、汚水を汚泥と上澄液に分離する沈澱槽において、
駆動手段により縦軸心回りに回転駆動され中央部に縦向
き配置された駆動軸と、この駆動軸の底部にほぼ水平に
延びた状態で連結されたレーキアームと、このレーキア
ームに固定されたレーキと、前記駆動軸とレーキアーム
とを連結してレーキアームの支持強度を高めるレーキ支
持部材とを備え、前記駆動軸の回転に伴ってレーキアー
ムおよびレーキの縦軸心回りの回転により沈澱した汚泥
を中央底部の集泥ピットに掻き寄せる汚泥掻寄機であっ
て、少なくとも前記駆動軸、レーキアームおよびレーキ
支持部材を繊維強化プラスチック樹脂製としたことを特
徴とするものである。The present invention, which has solved the above-mentioned problems, provides a settling tank for separating sewage into sludge and supernatant.
A drive shaft that is rotationally driven about the vertical axis by a drive unit and that is vertically arranged in the center, a rake arm that is connected to the bottom of the drive shaft in a state that extends substantially horizontally, and a rake that is fixed to the rake arm. A rake support member that enhances the support strength of the rake arm by connecting the drive shaft and the rake arm, and sludge precipitated by the rotation of the rake arm and the rake about the longitudinal axis of the rake arm along with the rotation of the drive shaft at the central bottom. A sludge scraper for scraping into a mud collecting pit, characterized in that at least the drive shaft, the rake arm and the rake support member are made of fiber reinforced plastic resin.
【００１０】本発明に係る汚泥掻寄機においては、汚水
と接触し、少なくとも強度的な負荷が大きい前記駆動
軸、レーキアームおよびレーキ支持部材を、繊維強化プ
ラスチック樹脂製とした。繊維強化プラスチックは、い
ずれの従来例のものより耐食性に優れ、耐用年数として
半永久的となる。さらに、この耐食性の向上とととも
に、ＳＳ４１では比重が７．８なのに対して、繊維強化
プラスチック（ポリエステル）では比重が１．９と約１
／４程度となるために、掻寄機の回転駆動動力費が低減
し、かつ据え付けコストも低減できる。In the sludge scraper according to the present invention, the drive shaft, the rake arm and the rake support member, which come into contact with wastewater and have a large strength load, are made of fiber reinforced plastic resin. The fiber reinforced plastic has better corrosion resistance than any of the conventional examples and has a semi-permanent service life. Furthermore, along with this improvement in corrosion resistance, SS41 has a specific gravity of 7.8, while fiber-reinforced plastic (polyester) has a specific gravity of 1.9, which is about 1
Since it is about / 4, the rotary drive power cost of the scraper can be reduced and the installation cost can be reduced.
【００１１】他方、当初、繊維強化プラスチックでは強
度が十分でないことが懸念されたが、現実に本発明に係
る掻寄機によって十分な強度を確保できることが確認さ
れた。On the other hand, initially, it was feared that the strength of the fiber-reinforced plastic was not sufficient, but it was confirmed that the scraper according to the present invention could actually secure sufficient strength.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図面
により具体的に説明する。図１は、本発明に係る汚泥掻
寄機１を沈澱槽２内に備えた中央駆動型の汚水処理設備
の縦断面図、図２はその平面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a central drive type sewage treatment facility provided with a sludge attractor 1 according to the present invention in a settling tank 2, and FIG. 2 is a plan view thereof.
【００１３】この沈澱槽２においては、汚泥分が沈降し
上澄液と分離される。沈澱槽２の内周面上方位置には、
越流堰３が設けられており、この越流堰３により、上澄
液が沈澱槽２の外部に排出される。越流堰３の内周縁に
は、樹脂、たとえばＰＶＣ樹脂製の堰板３Ａが取り付け
られている。In the settling tank 2, sludge is settled and separated from the supernatant. Above the inner surface of the settling tank 2,
An overflow weir 3 is provided, and the overflow weir 3 discharges the supernatant to the outside of the settling tank 2. A weir plate 3A made of resin, for example, PVC resin, is attached to the inner peripheral edge of the overflow weir 3.
【００１４】沈澱槽２の底面は、中央部分が窪んだ逆円
錐形状とされており、底部に溜まった汚泥は、中央部分
に集泥されるようになっている。この中央部分には、汚
泥掻寄機１によって集められる汚泥を集積するコーンス
クレッパー１９が集泥ピット４に設けられており、その
集泥ピット４には汚泥を外部に排出する汚泥引抜管５が
連結されている。また、沈澱槽２の上面は、鋼製のブリ
ッジ６が架設されており、汚泥掻寄機１が吊り下げられ
ている。The bottom of the settling tank 2 has an inverted conical shape with a depressed central portion, and sludge collected at the bottom is collected in the central portion. A corn scraper 19 for accumulating sludge collected by the sludge scraper 1 is provided in the sludge collecting pit 4 in this central portion, and a sludge drawing pipe 5 for discharging sludge to the outside is provided in the sludge collecting pit 4. It is connected. Further, a steel bridge 6 is installed on the upper surface of the settling tank 2, and the sludge attractor 1 is suspended.
【００１５】沈澱槽２の内部に設けられた本発明に係る
汚泥掻寄機１は、沈澱槽２の中央部を高さ方向に延びる
駆動軸１１を備え、この駆動軸１１は、ブリッジ６の上
側に設置された駆動モータ１２によって垂直軸回りに回
転させられる。沈澱槽２の内部における駆動軸１１の上
方部分は、フィードウェル１３で覆われており、このフ
ィードウェル１３は、取付ブラケット１４を介してブリ
ッジ６に固定されている。また、フィードウェル１３内
部には沈澱槽２外部から汚水が流入するフィードパイプ
１５によって連通されている。The sludge attractor 1 according to the present invention provided inside the settling tank 2 is provided with a drive shaft 11 extending in the height direction at the center of the settling tank 2, and the drive shaft 11 of the bridge 6. It is rotated about a vertical axis by a drive motor 12 installed on the upper side. An upper portion of the drive shaft 11 inside the precipitation tank 2 is covered with a feed well 13, and the feed well 13 is fixed to the bridge 6 via a mounting bracket 14. Further, the inside of the feed well 13 is communicated with a feed pipe 15 into which waste water flows from the outside of the settling tank 2.
【００１６】このフィードパイプ１５を介して沈澱槽２
に汚水が流入され、フィードウェル１３内に導入されて
た後、沈澱槽２内に導かれる。The settling tank 2 is fed through the feed pipe 15.
Sewage is introduced into the feed well 13, introduced into the feed well 13, and then introduced into the precipitation tank 2.
【００１７】さらに、駆動軸１１の下方には、沈澱槽２
の半径方向に沿ってその内周面まで延在する２本のレー
キアーム１６が固定されいる。レーキアーム１６は長尺
であるので、これを支持するために駆動軸１１の高さ方
向中央部分とレーキアーム１６との間にレーキ支持部材
１７Ａ，１７Ａが設けられている。さらに、剛性を高め
るために、平面視で四角形をなして４本のステー１７
Ｂ，１７Ｂ…が設けられ、２つの格点と駆動軸１１との
間を補助レーキ支持部材１７Ｃ，１７Ｃが連結してい
る。Below the drive shaft 11, a settling tank 2 is provided.
Two rake arms 16 extending along the radial direction of the rake arm 16 to the inner peripheral surface thereof are fixed. Since the rake arm 16 is long, rake support members 17A and 17A are provided between the rake arm 16 and the central portion of the drive shaft 11 in the height direction to support the rake arm 16. Further, in order to increase rigidity, the four stays 17 are formed in a square shape in a plan view.
B, 17B ... Are provided, and auxiliary rake support members 17C, 17C are connected between the two points and the drive shaft 11.
【００１８】レーキアーム１６には、その長手方向に離
間して、４枚のレーキ１８，１８…がそれぞれ固定され
ており、駆動軸１１およびレーキアーム１６の回転に伴
って、レーキ１８，１８…が底面に沿って移動すること
によって、沈澱槽２の下面に沈澱した汚泥が沈澱槽２の
下面中央の集泥ピット４に掻き寄せられる構造となって
いる。Four rakes 18, 18 ... Are fixed to the rake arm 16 so as to be spaced apart from each other in the longitudinal direction, and as the drive shaft 11 and the rake arm 16 rotate, the rakes 18, 18 ,. The sludge that has settled on the lower surface of the settling tank 2 is moved to the sludge collecting pit 4 at the center of the lower surface of the settling tank 2 as it moves along.
【００１９】さて、本発明において特徴的には、汚泥掻
寄機１のうち、汚水内に位置する部材、具体的に本実施
例においては、駆動軸１１、フィードウェル１３、取付
ブラケット１４、フィードパイプ１５、レーキアーム１
６、レーキ支持部材１７Ａ、ステー１７Ｂ、補助レーキ
支持部材１７Ｃ、レーキ１８およびコーンスクレッパー
１９が、いずれも繊維強化プラスチック、たとえば繊維
強化ポリエスデル樹脂製の部材が用いられる。Characteristically, in the present invention, a member of the sludge attractor 1 located inside the wastewater, specifically, in this embodiment, the drive shaft 11, the feed well 13, the mounting bracket 14, and the feed. Pipe 15, rake arm 1
6, the rake support member 17A, the stay 17B, the auxiliary rake support member 17C, the rake 18, and the cone scraper 19 are all made of fiber reinforced plastic, for example, fiber reinforced polyesdel resin.
【００２０】また、特に符号をもって詳細には図示しな
いが、たとえばこれらを連結するボルトやナットなど小
さい部材なども、駆動手段（駆動モータ１２）を除い
て、沈澱槽内に位置する部材の全てを樹脂製の部材が用
いるのがより望ましい。Although not shown in detail with reference numerals in particular, for example, small members such as bolts and nuts for connecting them are not limited to the driving means (driving motor 12) and all the members located in the precipitation tank are included. It is more desirable to use a resin member.
【００２１】前述の構造の汚泥掻寄機１においては、駆
動軸１１に大きいトルクがかかり、かつレーキアーム１
６に撓みがかかる。そこで、少なくともこれらと共に各
レーキ支持部材１７Ａは繊維強化プラスチックとする必
要がある。好ましくは、全ての構造部材を構成する部材
は、ステー１７Ｂおよび補助レーキ支持部材１７Ｃをも
含んで繊維強化プラスチックとする。構造部材は汚泥掻
寄機１に占める重量割合が大きく、これを軽量化する上
でも、プラスチック製とする必要がある。構造部材を構
成しない他の部材は、繊維強化プラスチックでなく、ポ
リエチレンなどの汎用プラスチックでもよい。In the sludge scraper 1 having the above structure, a large torque is applied to the drive shaft 11 and the rake arm 1 is used.
6 is bent. Therefore, at least these and each rake support member 17A must be made of fiber reinforced plastic. Preferably, all structural members are made of fiber reinforced plastic, including stays 17B and auxiliary rake support members 17C. The structural member has a large weight ratio in the sludge attractor 1, and it is necessary to make the structural member in order to reduce the weight. Other members not constituting the structural member may be general-purpose plastic such as polyethylene instead of fiber reinforced plastic.
【００２２】（強度試算）以下、実際に汚泥掻寄機を運
転する際に、汚泥掻寄機に求められる強度を知るために
モデル計算を行った。このモデル計算は、都市下水を処
理する最初沈殿池を想定し、図１に示す汚泥処理設備に
おける汚泥掻寄機１が、汚泥を掻き寄せる際に必要とす
るエネルギーを算出することにより行った。最初沈殿池
は、図３に示すように、直径Ｄ＝２０ｍとこの種の汚水
処理設備では比較的大きいものを想定した。ここに水深
２．５ｍまで汚水が導入される。その他、計算を行うに
あたって、表１に示す諸条件を仮定した。(Strength Trial Calculation) In the following, model calculation was carried out in order to know the strength required for the sludge attractor when actually operating the sludge attractor. This model calculation was performed by assuming the first settling basin for treating urban sewage and calculating the energy required for the sludge attractor 1 in the sludge treatment facility shown in FIG. 1 to scrape the sludge. As shown in FIG. 3, the initial settling tank was assumed to have a diameter D = 20 m, which is relatively large in this type of wastewater treatment facility. Sewage is introduced here to a water depth of 2.5 m. In addition, the various conditions shown in Table 1 were assumed for the calculation.
【００２３】[0023]
【表１】 [Table 1]
【００２４】まず、最初沈殿池内における汚泥の運搬量
Ｖ〔ｍ3 〕を（１）式より求められる。First, the transport amount V [m 3 ] of sludge in the settling basin is obtained from the equation (1).
【００２５】 Ｖ＝（πＤ2 ／４）×Ｈ＝（π×２０2 ／４）×２．５ ＝７８５．４……（１） また、沈殿時間が１．５時間であるから、最初沈殿池に
流入する下水量Ｑ〔ｍ3 ／時〕は、（２）式より求めら
れる。 Ｑ＝Ｖ／１．５＝７８５．４／１．５＝５２３．６〔ｍ3 〕……（２） 流入下水の水質は２５０ｐｐｍ、除去率は４０％である
ので、乾燥（ドライ）汚泥量ＱD 〔ｔ／時〕は、（３）
式より求められる。 ＱD ＝５２３．６×２５０×０．４×１０-6 ＝０．０５２４〔ｔ／時〕……（３） 最初沈殿池の汚泥含水率を９８％とすると、汚泥量Ｑ98
〔ｍ3 ／時〕は、（４）式より求められる。 Ｑ98＝０．０５２４×１００／（１００−９８） ＝２．６２〔ｍ3 ／時〕……（４） 汚泥を掻き寄せるエネルギーは、汚泥掻寄機が１回転中
に沈積する汚泥を運搬するのに要する駆動電動馬力とし
て算出した。[0025] V = The (πD 2/4) × H = (π × 20 2 /4)×2.5 = 785.4 ...... (1), since the precipitation time is 1.5 hours, the first precipitation The amount of sewage Q [m 3 / hour] flowing into the pond can be obtained from the equation (2). Q = V / 1.5 = 785.4 / 1.5 = 523.6 [m 3 ] ... (2) The quality of the inflowing sewage is 250 ppm, and the removal rate is 40%, so the amount of dry sludge Q D [t / hour] is (3)
Calculated from the formula. Q D = 523.6 × 250 × 0.4 × 10 -6 = 0.0524 [t / hr] (3) If the sludge water content of the first settling tank is 98%, the amount of sludge Q 98
[M 3 / hour] is obtained from the equation (4). Q 98 = 0.0524 × 100 / ( 100-98) = 2.62 [m 3 / h] ... (4) energy scrape the sludge, transport the sludge sludge raking device is deposited during one rotation It was calculated as the driving electric horsepower required to perform.
【００２６】周速を３〔ｍ／分〕としたときの１回転の
所要時間ｔ〔時間〕は（５）式により求められる。 ｔ＝π×２０／（３×６０）＝０．３５〔時間〕……（５） ｔ時間中に沈積する汚泥量Ｑt 〔ｔ／回転〕は（６）式
より求められる。 Ｑt ＝Ｑ98×１．０３×０．３５＝０．９４５〔ｔ／回転〕……（６） ゆえに、汚泥を運搬するために費やす動力〔Ｎ・ｋｗ〕
は（７）式より求められる。 Ｎ＝Ｑt ×μ×３／（６１２０×η） ＝０．０００２２〔ｋｗ〕……（７） ただし、η；サイクロ減速機械効率（＝０．９×０．９
×０．９＝０．７２９） μ；汚泥の摩擦係数（＝０．０３５） 以上のモデル計算より、径が２０ｍと比較的大きい沈澱
槽に設置された汚泥掻寄機であっても、汚泥を掻き寄せ
るために必要とする動力は０．０００２２ｋｗと小さい
ため、軸に掛かるトルクは非常に少ない。このことか
ら、樹脂製の部材を用いても強度的には十分に耐えられ
ることがわかる。The time t [hours] required for one rotation when the peripheral speed is 3 [m / min] is calculated by the equation (5). t = π × 20 / (3 × 60) = 0.35 [hours] (5) The sludge amount Q t [t / rotation] deposited during t hours can be obtained from the equation (6). Q t = Q 98 × 1.03 × 0.35 = 0.945 [t / rotation] ... (6) Therefore, the power spent to transport sludge [N · kw]
Is calculated from the equation (7). N = Q t × μ × 3 / (6120 × η) = 0.00022 [kw] (7) where η; cyclodeceleration mechanical efficiency (= 0.9 × 0.9)
× 0.9 = 0.729) μ; Sludge friction coefficient (= 0.035) From the above model calculation, even if the sludge scraper installed in a sedimentation tank with a diameter of 20 m is relatively large, sludge Since the power required to scrape the object is as small as 0.00022kw, the torque applied to the shaft is very small. From this, it is understood that the strength can be sufficiently endured even if the resin member is used.
【００２７】次に、図１に示すＦＲＰ製部材を用いた汚
泥掻寄機（以下、「ＦＲＰ製品」という）とＦＲＰ製部
材の代わりにＳＳ４１鋼にタールエポキシ塗装を施した
部材を用いた汚泥掻寄機（以下、「ＳＳ４１製品」とい
う）の引張強度、比重、および耐食性を比較した。その
結果を表２に示す。Next, a sludge scraper using a FRP member shown in FIG. 1 (hereinafter referred to as "FRP product") and a sludge using a member made of SS41 steel coated with tar epoxy instead of the FRP member. The tensile strength, specific gravity, and corrosion resistance of the scraper (hereinafter referred to as "SS41 product") were compared. The results are shown in Table 2.
【００２８】[0028]
【表２】 [Table 2]
【００２９】表２からわかるように、ＦＲＰ製品は、Ｓ
Ｓ４１製品と比較して、引張強度にはやや劣るものの、
上記モデル実験で示したように、汚泥掻寄機としての強
度としては問題ない。一方、比重はＳＳ４１製品の約１
／４であるため、運転の際に消費するエネルギーを大幅
に小さくすることができる。また、耐食性については、
ＳＳ４１製品の場合、耐食性を保持するために約２年間
隔では再塗装を余儀なくされるが、ＦＲＰ製品では耐食
されることはなく、耐食性に優れているといえる。As can be seen from Table 2, the FRP products are S
Although it is slightly inferior to the S41 product in tensile strength,
As shown in the above model experiment, there is no problem as the strength of the sludge scraper. On the other hand, the specific gravity is about 1 for SS41 products.
Since it is / 4, the energy consumed during operation can be greatly reduced. Regarding corrosion resistance,
In the case of SS41 products, in order to maintain corrosion resistance, repainting is inevitable at intervals of about 2 years, but FRP products do not corrode and can be said to have excellent corrosion resistance.
【００３０】[0030]
【発明の効果】以上のとおり、本発明によれば、汚泥と
接触しても腐食することがなく、しかも軽量であるため
に、駆動動力費および据え付けコストを低減することが
できる。As described above, according to the present invention, the drive power cost and the installation cost can be reduced because it does not corrode even when it comes into contact with sludge and is lightweight.
【図１】本発明に係る汚泥掻寄機を設置した汚水処理施
設の縦断面図である。FIG. 1 is a vertical cross-sectional view of a sewage treatment facility equipped with a sludge scraper according to the present invention.
【図２】その平面図である。FIG. 2 is a plan view thereof.
【図３】モデル計算に用いた最初沈殿池の寸法を示す概
略図である。FIG. 3 is a schematic diagram showing the dimensions of the first settling tank used in the model calculation.
１…汚泥掻寄機、２…沈澱槽、３…越流堰、４…集泥ピ
ット、５…汚泥引抜管、６…ブリッジ、１１…駆動軸、
１２…駆動モータ、１３…フィードウェル、１４…取付
ブラケット、１５…フィードパイプ、１６…レーキアー
ム、１７Ａ…レーキ支持部材、１７Ｂ…ステー、１７Ｃ
…補助レーキ支持部材、１８…レーキ、１９…コーンス
クレッパー。DESCRIPTION OF SYMBOLS 1 ... Sludge attractor, 2 ... Sedimentation tank, 3 ... Overflow weir, 4 ... Mud collecting pit, 5 ... Sludge extraction pipe, 6 ... Bridge, 11 ... Drive shaft,
12 ... Drive motor, 13 ... Feed well, 14 ... Mounting bracket, 15 ... Feed pipe, 16 ... Rake arm, 17A ... Rake support member, 17B ... Stay, 17C
... auxiliary rake support member, 18 ... rake, 19 ... corn scraper.
Claims (2)
いて、 駆動手段により縦軸心回りに回転駆動され中央部に縦向
き配置された駆動軸と、この駆動軸の底部にほぼ水平に
延びた状態で連結されたレーキアームと、このレーキア
ームに固定されたレーキと、前記駆動軸とレーキアーム
とを連結してレーキアームの支持強度を高めるレーキ支
持部材とを備え、前記駆動軸の回転に伴ってレーキアー
ムおよびレーキの縦軸心回りの回転により沈澱した汚泥
を中央底部の集泥ピットに掻き寄せる汚泥掻寄機であっ
て、 少なくとも前記駆動軸、レーキアームおよびレーキ支持
部材を繊維強化プラスチック樹脂製としたことを特徴と
する沈澱槽における汚泥掻寄機。1. A settling tank for separating sewage into sludge and supernatant liquid, a drive shaft rotationally driven by a drive means about a vertical axis center and arranged vertically in the center, and a horizontal shaft at the bottom of the drive shaft. And a rake arm fixed to the rake arm, and a rake support member for connecting the drive shaft and the rake arm to enhance the support strength of the rake arm. Is a sludge scraper that scrapes sludge deposited by rotation of the rake arm and the rake about the longitudinal axis of the rake into a central bottom mud collecting pit, and at least the drive shaft, the rake arm and the rake support member are made of fiber reinforced plastic resin. A sludge trapping machine in a settling tank characterized by the above.
る部材の全てを繊維強化プラスチック樹脂製とした請求
項１記載の沈澱槽における汚泥掻寄機。2. A sludge scraper in a settling tank according to claim 1, wherein all members except the driving means are made of fiber reinforced plastic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11656496A JPH09299713A (en) | 1996-05-10 | 1996-05-10 | Sludge rake-up device in precipitator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11656496A JPH09299713A (en) | 1996-05-10 | 1996-05-10 | Sludge rake-up device in precipitator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09299713A true JPH09299713A (en) | 1997-11-25 |
Family
ID=14690238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11656496A Pending JPH09299713A (en) | 1996-05-10 | 1996-05-10 | Sludge rake-up device in precipitator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09299713A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003000378A1 (en) * | 2001-06-25 | 2003-01-03 | Outokumpu Oyj | Method and apparatus for clarifying and/or thickening a slurry |
| JP2006281059A (en) * | 2005-03-31 | 2006-10-19 | Kurita Water Ind Ltd | Precipitation tank |
| JP2007125451A (en) * | 2005-11-01 | 2007-05-24 | Tsukishima Kikai Co Ltd | Sludge scraping machine |
| KR100787206B1 (en) * | 2007-08-28 | 2007-12-21 | (주)덕성산업기계 | A device for discharging sludges of settling pond |
| CN103638696A (en) * | 2013-11-15 | 2014-03-19 | 成都市翻鑫家科技有限公司 | Thickener capable of adjusting elevation angle of rake arm |
| CN103990303A (en) * | 2014-05-13 | 2014-08-20 | 淮北重科矿山机器有限公司 | Corrosion-resistant special thickener |
| CN105031980A (en) * | 2015-08-10 | 2015-11-11 | 淮北重科矿山机器有限公司 | Main shaft protection device |
| CN116199319A (en) * | 2023-05-05 | 2023-06-02 | 山东欧迈机械股份有限公司 | Waste water clarifier |
-
1996
- 1996-05-10 JP JP11656496A patent/JPH09299713A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003000378A1 (en) * | 2001-06-25 | 2003-01-03 | Outokumpu Oyj | Method and apparatus for clarifying and/or thickening a slurry |
| US6855262B2 (en) | 2001-06-25 | 2005-02-15 | Outokumpu Oyj | Method and apparatus for clarifying and/or thickening a slurry |
| JP2006281059A (en) * | 2005-03-31 | 2006-10-19 | Kurita Water Ind Ltd | Precipitation tank |
| JP4696646B2 (en) * | 2005-03-31 | 2011-06-08 | 栗田工業株式会社 | Sedimentation tank |
| JP2007125451A (en) * | 2005-11-01 | 2007-05-24 | Tsukishima Kikai Co Ltd | Sludge scraping machine |
| KR100787206B1 (en) * | 2007-08-28 | 2007-12-21 | (주)덕성산업기계 | A device for discharging sludges of settling pond |
| CN103638696A (en) * | 2013-11-15 | 2014-03-19 | 成都市翻鑫家科技有限公司 | Thickener capable of adjusting elevation angle of rake arm |
| CN103990303A (en) * | 2014-05-13 | 2014-08-20 | 淮北重科矿山机器有限公司 | Corrosion-resistant special thickener |
| CN103990303B (en) * | 2014-05-13 | 2015-07-08 | 淮北重科矿山机器有限公司 | Corrosion-resistant special thickener |
| CN105031980A (en) * | 2015-08-10 | 2015-11-11 | 淮北重科矿山机器有限公司 | Main shaft protection device |
| CN116199319A (en) * | 2023-05-05 | 2023-06-02 | 山东欧迈机械股份有限公司 | Waste water clarifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO1999067006A1 (en) | Coagulation reaction device | |
| JPS61238307A (en) | Sewage treatment apparatus also used as square water purifying apparatus | |
| FI114783B (en) | Method and apparatus for clarifying sludge | |
| US20160221845A1 (en) | Magnetic ballast clarification designs and applications | |
| JPH09299713A (en) | Sludge rake-up device in precipitator | |
| US7235182B2 (en) | Pulp stabilisation apparatus for a thickener | |
| CN201304267Y (en) | sand water purifier | |
| CN102357315A (en) | Suspension mechanical stirring settling pond | |
| CN211357844U (en) | Mud scraper with remove dross function | |
| KR200440204Y1 (en) | Spray equipment for reservoir water | |
| CN206853200U (en) | A kind of peripheral-traction full-bridge type mud scraper | |
| KR100533523B1 (en) | Settling tank having buffers for removing scum | |
| CN202315446U (en) | Suspension type mechanical stirring clarification tank | |
| US3864257A (en) | Method and apparatus for surface skimming | |
| KR100713774B1 (en) | Impeller for reservoir water | |
| Shammas et al. | Sedimentation | |
| US8225943B2 (en) | Circular clarifier cleaning system | |
| CN201240910Y (en) | High speed precipitation tank for treatment of heavy metal wastewater | |
| KR102066510B1 (en) | Inclined spiral sludge collector | |
| US5389249A (en) | Clarifier with rotating sealed cover | |
| CN208990310U (en) | Peripheral-traction hydrocone type scraping and sucking machine | |
| CN217340199U (en) | Novel radial flow sedimentation tank | |
| CN217163319U (en) | Overwater control device of slag skimming machine | |
| CN211226650U (en) | Sedimentation tank for sewage treatment plant | |
| CN110156265A (en) | Integrated effluent disposal system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Effective date: 20050201 Free format text: JAPANESE INTERMEDIATE CODE: A971007 |
|
| A131 | Notification of reasons for refusal |
Effective date: 20060728 Free format text: JAPANESE INTERMEDIATE CODE: A131 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060926 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070112 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20070511 |
|
| A521 | Written amendment |
Effective date: 20070710 Free format text: JAPANESE INTERMEDIATE CODE: A523 |
|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20070921 |