JPH0515704A - Settling tank of waste water treatment device installed in oscillating structure such as ship or train - Google Patents

Abstract

PURPOSE:To provide a settling tank of a waste water treatment device which suitably functions even if the tank itself oscillates greatly and repeatedly. CONSTITUTION:A rising cylinder 3 having a relatively small sectional area is provided on the top surface of a tank 1 so as to form a free water surface (w) in the cylinder and funnel-like inclined plates 8 are arranged so as to surround a straightening cylinder 4 within a certain range of height to form a group of inclined passages 6, while a collecting pipe 10 with a plurality of liquid inlet ports 10a which are disposed over the whole area at a predetermined level above the passages 6 is provided to allow water having been made clean to freely flow out through said pipe. With this arrangement, a settling tank of a waste water treatment device for a ship, etc., is provided.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は船舶や列車など揺れる構
造物にに設置される汚水処理装置の沈澱槽に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a settling tank for a sewage treatment apparatus installed on a swaying structure such as a ship or a train.

【０００２】[0002]

【従来の技術】汚水処理装置には曝気槽から汚水を移流
される沈澱槽がある。該沈澱槽は懸濁粒子などを沈澱さ
せることにより汚水を清澄化し、清澄化された水は図４
に示すようにＶ形の切込み１’の形成された越流堰２’
から越流させ次工程へ移流させる構成となしてある。2. Description of the Related Art A sewage treatment apparatus has a settling tank to which sewage is advected from an aeration tank. The settling tank clarifies the sewage by precipitating suspended particles and the clarified water is as shown in FIG.
Overflow weir 2'with V-shaped cut 1'as shown in Fig.
It is designed to overflow from the above and to be admitted to the next process.

【０００３】このさい槽本体１の水平断面積は汚水中の
懸濁粒子の沈降速度に見合ったものとなされており、ま
た従来の沈澱槽の自由水面ｗ’は槽３’本体に較べ比較
的大きい面積のものとなされている。The horizontal cross-sectional area of the tank body 1 is adapted to the settling velocity of suspended particles in wastewater, and the free water surface w'of a conventional settling tank is relatively larger than that of the tank 3'body. It is said to have a large area.

【０００４】[0004]

【発明が解決しようとする課題】船舶などは波浪により
大きく動揺されるが、このさい汚水処理装置も同様に動
揺され、沈澱槽内の自由水面ｗ’は大きく揺れるものと
なる。このような自由水面の大きな揺れは同表面の面積
が比較的大きいことから槽３’内の液全体を容易に攪乱
させるものとなるのである。このため槽内の汚水に含ま
れる懸濁粒子は円滑な沈降を妨げられるものとなるので
あり、また清澄化された水は自由水面ｗ’の揺れにより
均等に越流堰２’から越流できず、このことがさらに槽
内の汚水の流れの均等性を乱し、懸濁粒子の円滑な沈降
を一層困難となすのである。本発明は斯かる問題点を解
消し得るものとした船舶などに設置される汚水処理装置
の沈澱槽を提供することを目的とする。Although a ship or the like is greatly shaken by waves, the sewage treatment apparatus is also shaken at the same time, and the free water surface w'in the settling tank is greatly shaken. Such large shaking of the free water surface easily disturbs the whole liquid in the tank 3'because the surface area is relatively large. Therefore, suspended particles contained in the sewage in the tank hinder smooth sedimentation, and the clarified water can evenly overflow from the overflow weir 2'due to the shaking of the free water surface w '. However, this further disturbs the uniformity of the flow of wastewater in the tank, making smooth sedimentation of suspended particles more difficult. It is an object of the present invention to provide a settling tank for a wastewater treatment device installed in a ship or the like, which can solve such problems.

【０００５】[0005]

【課題を解決するための手段】上記目的を達成するた
め、本発明は槽本体の頂面を中央部へ向けて漸次上昇さ
せると共に同中央部には槽内と連通された比較的小さな
横断面積の立上がり筒を設け、該立上がり筒内に上端開
口を臨ませ下端開口は槽本体の比較的深い個所に位置さ
せてなる整流筒を設けると共にこれの長手方向途中には
汚水流入管を連通させ、且つこれの上方の一定高さ面全
域に配置された複数の液流入口の設けられた集水管を設
け、該集水管に連通された液溢流管を前記整流筒の上端
まで立ち上がらせた後に降下させるようになすほか、前
記整流筒の内方でこれの上端よりも僅かに低い個所に開
口されたスカム排出路を形成し、なお必要に応じて前記
整流筒の一定高さ範囲内にはこれを取り巻くように漏斗
状の斜板を適当間隔毎に上下方向に積層して形成した傾
斜通路群を設けしめたことを特徴とする。斯かる本発明
装置の作用は次の実施例の記載から明らかとなる。In order to achieve the above-mentioned object, the present invention gradually raises the top surface of the tank main body toward the central portion, and at the same time, the central portion has a relatively small cross-sectional area communicating with the inside of the tank. Is provided, the upper end opening is exposed in the rising cylinder, the lower end opening is provided at a relatively deep portion of the tank main body, and a sewage inflow pipe is made to communicate in the middle in the longitudinal direction thereof. Further, a water collecting pipe provided with a plurality of liquid inflow ports arranged over the entire surface of a certain height above the water collecting pipe is provided, and after the liquid overflow pipe communicating with the water collecting pipe is raised to the upper end of the rectifying cylinder. In addition to lowering, a scum discharge path is formed inside the straightening cylinder at a position slightly lower than the upper end of the straightening cylinder, and if necessary, within a certain height range of the straightening cylinder. Enclose the funnel-shaped swash plate so that it surrounds it. Characterized in that occupies provided inclined path group formed by stacking in the vertical direction. The operation of the device of the present invention will be apparent from the description of the following embodiments.

【０００６】[0006]

【実施例】以下、本発明の具体的な実施例を図１〜図３
により説明する。ここに図１は本発明に係る沈澱槽の正
面視断面図、図２は図１のＸ−Ｘ部断面図、図３は図１
のｐ部を示す拡大図である。EXAMPLES Specific examples of the present invention will be described below with reference to FIGS.
Will be described. 1 is a front sectional view of a settling tank according to the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG.
It is an enlarged view showing the p section.

【０００７】図に於いて１は断面角形の槽本体で上部開
口には頂面をなす天蓋２が固定されてなる。該天蓋２は
中央部に向かって漸次上昇されると共に同中央部には槽
内に連通された立上がり筒３を固定されてなる。４は上
端開口を立上がり筒３内に臨ませ下端開口は槽内の底部
に位置させた整流筒で、その長手方向途中には図示しな
い曝気槽からの汚水を流入させるための汚水流入管５を
連通させるほか、下端開口には汚水の拡散を均一となす
などのためベルマウス形の案内部材４ａが固定させてあ
る。６は槽本体１の中心部から外方へ向けて漸次上昇さ
れた多数の偏平通路７からなる傾斜通路群で前記整流筒
４の外方となる一定高さ範囲内にこれを取り巻くように
漏斗状の斜板８を適当間隔毎に上下方向へ積層して形成
してある。なお９は斜板８を槽本体１の壁に固定するた
めの支持棒である。１０は傾斜通路群６の上方で天蓋２
の下方近傍に配置した集水管で、その周壁には図３に示
すような多数の液流入口１０ａを設けてこれが出来るだ
け一定高さ面の全域に配置されるようになしてある。該
集水管１０には液溢流管１１が連通させてあって整流筒
４の上端まで一旦立ち上がらせると共に頂部にサイホン
防止管ｇを突出させ、且つその根部を外方へ向け漸次降
下させ次工程へ導くようにする。１２はスカム排出路
で、前記整流筒４の内方でこれの上端よりも僅かに低い
個所に吸引口としてのスカムスキーマー１３を配置する
と共にこれに接続された排出管１４は前工程の曝気槽か
或いは調整槽まで導くようになして形成している。この
さい排出管１４の途中にはエアリフトポンプ１５などを
設けて強制的にスカムを移送し得るものとなす。１６は
槽内の底部に吸引口の開口されたスラリー排出管で、図
示しない汚泥濃縮貯溜槽まで導かれると共にその途中に
はエアリフトポンプ１７などを設けてスラリーの強制的
な移送を可能となしてある。In the figure, reference numeral 1 denotes a tank main body having a rectangular cross section, and a canopy 2 having a top surface is fixed to an upper opening thereof. The canopy 2 is gradually raised toward the central portion, and a rising tube 3 communicating with the inside of the tank is fixed to the central portion. Reference numeral 4 is a straightening cylinder whose upper end opening faces the rising cylinder 3 and whose lower end opening is located at the bottom of the tank. A sewage inflow pipe 5 for letting in sewage from an aeration tank (not shown) is provided midway in its longitudinal direction. In addition to communicating with each other, a bellmouth-shaped guide member 4a is fixed to the lower end opening in order to make the diffusion of sewage uniform. Reference numeral 6 designates a group of inclined passages composed of a large number of flat passages 7 which are gradually raised outward from the center of the tank body 1 so as to surround the straightening cylinder 4 within a certain height range. Swash plates 8 are vertically stacked at appropriate intervals. Reference numeral 9 is a support rod for fixing the swash plate 8 to the wall of the tank body 1. 10 is a canopy 2 above the inclined passage group 6.
A plurality of liquid inlets 10a as shown in FIG. 3 are provided on the peripheral wall of the water collecting pipe arranged in the vicinity of the lower part of the water collecting pipe so as to be arranged in the entire area of the constant height surface as much as possible. A liquid overflow pipe 11 is communicated with the water collecting pipe 10 so that the liquid collecting overflow pipe 11 once rises to the upper end of the flow straightening cylinder 4 and a siphon prevention pipe g is projected at the top portion thereof, and the root portion thereof is gradually lowered outwardly to the next step. Try to lead to. Reference numeral 12 is a scum discharge path, and a scum schema 13 as a suction port is arranged inside the rectifying cylinder 4 at a position slightly lower than the upper end of the rectification cylinder 4, and a discharge pipe 14 connected to the scum schema 13 is used for aeration in the previous step. It is formed so as to lead to the tank or the adjusting tank. An air lift pump 15 or the like is provided in the middle of the discharge pipe 14 so that the scum can be forcibly transferred. Reference numeral 16 is a slurry discharge pipe having a suction port opened at the bottom of the tank, which is guided to a sludge concentration storage tank (not shown), and an air lift pump 17 or the like is provided on the way to enable forced transfer of the slurry. is there.

【０００８】上記の如く構成した実施例装置の使用例及
びその作用を説明する。使用に先立って液溢流管１１か
ら水が溢れ出すまで槽内に水を供給する。これにより槽
内の自由水面ｗは立上がり筒３内で整流筒４の上端より
も僅かに高くなるように保持されるものとなる。この
後、図示しない曝気槽の汚水を汚水流入管５を経て整流
筒４内に流入させる。これにより汚水は整流筒４に案内
されて流下し槽底部全般に拡散されるように流出される
ものとなる。次いで槽本体１がこの汚水を上方へ案内す
るものとなって、汚水は槽内の全域に分散された状態の
上向流となる。この上向流はこれに混入された除去すべ
き懸濁粒子の沈降速度より小さく設定されているため、
それら懸濁粒子は傾斜通路群６の下方の槽底部で沈澱に
より分離されるものとなる。そして、ここで分離されな
かった微小粒子を含んだ水は傾斜通路群６の偏平通路７
・・・を通過する間に斜板８・・・により効果的に分離
され、分離された粒子は斜板８・・・に案内されつつ降
下して槽底部に沈降されるものとなる。かくして清澄化
されつつ傾斜通路群６の上方へ達した水は液流入口１０
ａ・・・から集水管１０内に流入し液溢流管１１から自
然流下され次工程へ移流されるものとなる。しかして、
汚水から分離された懸濁粒子は槽底部にスラリー状とな
って濃縮滞留するが、これらはスラリー排出管１６を経
て適時に図示しない汚泥濃縮貯溜槽まで強制移送するよ
うに処理する。一方、傾斜通路群６を経ても分離されな
かった微小粒子や浮遊成分が槽上部に向かって浮上する
ことがあるが、これらは槽内頂面をなす傾斜状の天蓋２
下面に案内されて立上がり筒３内に導かれる。そしてこ
れら微小粒子や浮遊成分は整流筒４内を直接浮上したス
カムと一緒にスカム排出経路１２を経て強制的に曝気槽
或いは調整槽に強制的に返送するようになす。A usage example and operation of the embodiment apparatus configured as described above will be described. Prior to use, water is supplied into the tank until water overflows from the liquid overflow pipe 11. As a result, the free water surface w in the tank is held in the rising cylinder 3 so as to be slightly higher than the upper end of the flow straightening cylinder 4. After that, sewage in an aeration tank (not shown) is caused to flow into the flow straightening cylinder 4 through the sewage inflow pipe 5. As a result, the sewage is guided to the flow straightening cylinder 4 and flows down so as to be diffused over the entire bottom of the tank. Next, the tank body 1 guides the sewage upward, and the sewage becomes an upward flow in a state of being dispersed in the entire area of the tank. Since this upward flow is set to be smaller than the sedimentation velocity of suspended particles mixed in it,
The suspended particles are separated by settling at the bottom of the tank below the inclined passage group 6. The water containing fine particles not separated here is supplied to the flat passages 7 of the inclined passage group 6.
While being passed through, the swash plate 8 is effectively separated, and the separated particles are guided by the swash plate 8 to descend and settle on the bottom of the tank. Thus, the water that has reached the upper side of the inclined passage group 6 while being clarified is the liquid inlet 10
The water flows into the water collection pipe 10 from a ..., Is naturally flown down from the liquid overflow pipe 11, and is transferred to the next process. Then,
The suspended particles separated from the sewage are concentrated and retained in the form of a slurry at the bottom of the tank, but these are processed so as to be forcibly transferred to a sludge concentration storage tank (not shown) through the slurry discharge pipe 16 at appropriate times. On the other hand, fine particles and floating components that have not been separated even after passing through the inclined passage group 6 may float toward the upper part of the tank.
It is guided to the lower surface and guided into the rising cylinder 3. Then, these fine particles and floating components are forcibly returned to the aeration tank or the adjustment tank together with the scum floating directly inside the flow straightening cylinder 4 through the scum discharge path 12.

【０００９】次に槽本体１が大きくしかも反復して動揺
された場合について述べる。自由水面の大きさの異なる
同一容積の槽に水を満たし、この槽に動揺を与えたとき
槽内液の攪乱される大きさは自由水面の大きさに正比例
することは知られているが、本発明装置に於いては自由
水面ｗが横断面積の比較的小さい立上がり筒３内にのみ
形成されるため槽本体１の動揺により自由水面ｗが動揺
されてもその影響は少なく、槽本体１内の沈澱処理が乱
されるほどに槽内の水が攪乱されるには至らないのであ
る。また傾斜通路群６を経た後の清澄な水は槽内の水中
一定高さ面の全域に配置された液流入口１０ａ・・・か
ら集水管１０内に集水され溢流管１１から流出されるた
めたとえ自由水面ｗが動揺してもその影響を殆ど受ける
ものとならず、槽内一定高さ面の全域から比較的均等に
流出されるものとなって該流出が槽内の水を攪乱する要
因となることはないのであり、従来の越流堰に於けるよ
うな自由水面の揺れによる越流量の不均一性により槽内
の水が攪乱されるといった現象は完全に回避されるので
ある。Next, a case where the tank body 1 is large and repeatedly shaken will be described. It is known that when the tanks of the same volume with different sizes of the free water surface are filled with water and the tank is shaken, the disturbed size of the liquid in the tank is directly proportional to the size of the free water surface. In the device of the present invention, since the free water surface w is formed only in the rising cylinder 3 having a relatively small cross-sectional area, even if the free water surface w is shaken by the shaking of the tank body 1, the effect is small, and the inside of the tank body 1 is small. The water in the tank is not disturbed to such an extent that the sedimentation treatment is disturbed. Further, the clear water after passing through the inclined passage group 6 is collected into the water collecting pipe 10 from the liquid inlets 10a arranged in the whole area of the constant height surface of the water in the tank and is discharged from the overflow pipe 11. Therefore, even if the free water surface w fluctuates, it is hardly affected, and the water flows out relatively uniformly from the entire area of the constant height surface in the tank, and the outflow disturbs the water in the tank. Therefore, the phenomenon that the water in the tank is disturbed due to the non-uniformity of the overflow due to the fluctuation of the free water surface in the conventional overflow weir is completely avoided. .

【００１０】[0010]

【発明の効果】上記した本発明によれば、槽本体内の自
由水面が立上がり筒内に保持されてその面積が比較的小
さくなると共に清澄化された水が水中の液流出口を通じ
て均等に流出されるものとなるため、槽本体が動揺され
て自由水面が揺れることがあっても槽内の水が攪乱され
ることはなくなるのであり、したがって本発明装置の設
置された船舶などが大きくしかも反復して動揺されたと
しても好適に沈澱処理の実施されるものとなるのであ
る。According to the present invention described above, the free water surface in the tank body rises and is held in the cylinder so that its area becomes relatively small, and the clarified water evenly flows out through the submerged liquid outlet. Therefore, even if the main body of the tank is shaken and the free water surface is shaken, the water in the tank is not disturbed. Therefore, the vessel in which the device of the present invention is installed is large and repeatable. Even if it is shaken, the precipitation treatment can be carried out properly.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明に係る沈澱槽の正面視断面図である。FIG. 1 is a front sectional view of a settling tank according to the present invention.

【図２】図１のＸ−Ｘ部断面図である。FIG. 2 is a sectional view taken along line XX of FIG.

【図３】図１のｐ部を示す拡大図である。FIG. 3 is an enlarged view showing a portion p in FIG.

【図４】従来例に係る図である。FIG. 4 is a diagram according to a conventional example.

【符号の説明】[Explanation of symbols]

１ 槽本体 ３ 立上がり筒 ４ 整流筒 ５ 汚水流入管 ８ 斜板 ７ 偏平通路 １０ 集水管 １０ａ 液流入口 １１ 液溢流管 １２ スカム排出路 1 Tank main body 3 Rising cylinder 4 Rectifying cylinder 5 Sewage inflow pipe 8 Swash plate 7 Flat passage 10 Water collecting pipe 10a Liquid inlet 11 Liquid overflow pipe 12 Scum discharge passage

Claims (1)

【特許請求の範囲】 【請求項１】 槽本体の頂面を中央部へ向けて漸次上昇
させると共に同中央部には槽内と連通された比較的小さ
な横断面積の立上がり筒を設け、該立上がり筒内に上端
開口を臨ませ下端開口は槽本体の比較的深い個所に位置
させてなる整流筒を設けると共にこれの長手方向途中に
は汚水流入管を連通させ、且つこれの上方の一定高さ面
全域に配置された複数の液流入口の設けられた集水管を
設け、該集水管に連通された液溢流管を前記整流筒の上
端まで立ち上がらせた後に降下させるようになすほか、
前記整流筒の内方でこれの上端よりも僅かに低い個所に
開口されたスカム排出路を形成し、なお必要に応じて前
記整流筒の一定高さ範囲内にはこれを取り巻くように漏
斗状の斜板を適当間隔毎に上下方向に積層して形成した
傾斜通路群を設けしめたことを特徴とする船舶や列車な
ど揺れる構造物にに設置される汚水処理装置の沈澱槽。Claim: What is claimed is: 1. A top tube of a tank main body is gradually raised toward a central portion thereof, and a rising cylinder having a relatively small cross-sectional area communicating with the inside of the tank is provided at the central portion, and the rising tube is raised. A rectifying cylinder is provided with the upper end opening facing the inside of the cylinder and the lower end opening located at a relatively deep portion of the tank main body, and a sewage inflow pipe is connected in the middle of the lengthwise direction of the rectifying cylinder, and a certain height above it. A water collecting pipe provided with a plurality of liquid inlets arranged over the entire surface is provided, and the liquid overflow pipe communicated with the water collecting pipe is raised to the upper end of the rectifying cylinder and then lowered.
A scum discharge path is formed inside the straightening cylinder at a position slightly lower than the upper end of the straightening cylinder. If necessary, the scum discharge path is surrounded by a funnel shape so as to surround it. A settling tank for a sewage treatment apparatus installed on a swaying structure such as a ship or a train, which is provided with a group of inclined passages formed by vertically stacking swash plates at appropriate intervals.