JP4081368B2

JP4081368B2 - Separation device

Info

Publication number: JP4081368B2
Application number: JP2002372524A
Authority: JP
Inventors: 道夫臼井
Original assignee: 株式会社アサヒビールエンジニアリング
Priority date: 2002-12-24
Filing date: 2002-12-24
Publication date: 2008-04-23
Anticipated expiration: 2022-12-24
Also published as: JP2004202319A

Description

【０００１】
【発明の属する技術分野】
本発明は、液体から浮遊物と沈降物とを分離する分離装置に関し、特に、分離性の向上を図った技術に関する。
【０００２】
【従来の技術】
従来から、浮遊物と沈降物とを含んだ工場廃水などの液体から、浮遊物と沈降物とを分離する分離装置が知られている。かかる分離装置として、複数の傾斜板を間隔を隔てて略平行に列設し、傾斜板間を液体が通過する際に、傾斜板の下面に沿って浮遊物を上昇させる一方、その上面に沿って沈降物を下降させるようにして、両者を分離するようにしたものが種々ある。
【０００３】
例えば、特許文献１に開示されたものは、液体流通方向に沿って多数の中空部を形成した中空板を流体流路内に傾斜して複数配設し、中空板の各中空部と中空板相互の間隔とにより、浮遊沈降作用が奏されるようにしたものである。特許文献２に開示されたものは、波状傾斜板と有孔平板とを交互に積層してなる積層板を液体流路に傾斜配設したものである。特許文献３に開示されたものは、処理槽内に隔壁をもって区画された原水流入部及び処理水流出部のうち処理水流出部に、複数の傾斜管の管状部材或いは複数の傾斜板の板状部材を間隔をおいて重ね合わせたモジュールを配設して沈降分離部材を設けたものである。その他には、傾斜板を利用した分離装置としては、特許文献４および特許文献５に開示されたものがある。
【０００４】
【特許文献１】
特開昭５２−１１４７３号公報（第２−３頁，図１−３）
【特許文献２】
特開昭５５−１２４５０４号公報（第２頁，図１−２）
【特許文献３】
特開昭６１−２５７２９５号公報（第２−３頁，図１−２）
【特許文献４】
特開平１１−３００１０９号公報（図４）
【特許文献５】
特開２００２−１５９９９０号公報（図１）
【０００５】
【発明が解決しようとする課題】
しかしながら、従来技術の分離装置は、単純に複数の傾斜板を間隙をもって略平行に配設し、ここに供給された液体が傾斜板間を流れる間に、傾斜板の下面に沿って浮遊物を上昇させる一方、その上面に沿って沈降物を下降させるようにして、浮遊物と沈降物とを分離する構成であるため、供給された液体の分離通路が直線的であり、液体が勢い良く分離通路を流れ易い。この結果、液体が短絡的に排出部に向かってしまい、浮遊物と沈降物とが一緒に外部に排出されたり、浮遊部にて沈降物が回収されたり、沈降部にて浮遊物が回収されるなどして、浮遊物と沈降物とが効果的に分離できず、分離性に劣るものであった。
【０００６】
そこで、本発明は以上のような従来の問題点に鑑み、供給された液体の分離通路が蛇行したラビリンス通路になるようにして、液体が短絡的に排出部に向かうのを防止して、分離性の向上を図った分離装置を提供することを目的とする。
【０００７】
【課題を解決するための手段】
このため、請求項１記載の発明では、略鉛直方向に延びつつ略同心に配置される筒形状の隔壁により、下部において相互に連通するように、分離部を挟んでその内周及び外周に浮遊部及び沈降部を夫々区画形成し、前記分離部に、前記浮遊部に向かって鉛直上方に傾斜する裁頭錐体形状の薄板からなる傾斜板を所定間隔を隔てつつ略平行に積層すると共に、隣接する傾斜板の異なる位置に液体流通口を開設してラビリンス通路を形成する一方、前記浮遊部を区画する隔壁であって前記傾斜板との接続部直下、及び、前記沈降部を区画する隔壁であって前記傾斜板との接続部直上に、前記分離部と浮遊部及び沈降部とを連通させる開口部を夫々形成し、前記ラビリンス通路の入口部付近に、下部から鉛直上方に向けて、浮遊物及び沈降物を含んだ液体を供給する液体供給部を設け、前記液体供給部から供給された液体と前記沈降部を下降する沈降物とが混合することを抑制すべく、最下部に位置する傾斜板の外端部から液体供給部の下方まで延びる筒形状の混合抑制部材を設けたことを特徴とする。
【０００８】
かかる構成によれば、液体供給部からラビリンス通路の入口部付近に供給された液体は、ラビリンス通路内を上向流にて流通する。このとき、液体の流路が蛇行するため、液体が分離部を短絡的に通過せず、液体中の浮遊物は傾斜板の下面に沿って上昇し、開口部を通って浮遊部へと移行される。浮遊部に移行した浮遊部は、液体より比重が軽いことから、鉛直上方に上昇して浮遊部の上部に収容される。浮遊部の上部に収容された浮遊物は、例えば、スカム除去装置により処理される。一方、液体中の沈降物は傾斜板の上面に沿って下降し、開口部を通って沈降部へと移行される。沈降部に移行した沈降物は、液体より比重が重いことから、鉛直下方に下降して沈降部の下部に収容される。沈降部の下部に収容された沈降物は、例えば、沈殿物処理装置により処理される。
また、傾斜板が裁頭錐体形状の薄板からなるため、分離部の体積が増大し、単位時間当たりの浮遊物及び沈降物の分離性能が向上する。さらに、液体供給部から供給された液体と沈降部を下降した沈降物とが混合することを抑制する混合抑制部材が設けられているため、沈降部を下降した沈降物が、液体供給部からの液流により分離部に再度供給されることが防止され、浮遊物及び沈降物の分離性の低下が抑制される。その他、浮遊物及び沈降物の分離性能を確保しつつ、装置のコンパクト化が促進される。
【０００９】
請求項２記載の発明では、前記傾斜板の複数位置に液体流通口を開設して、複数のラビリンス通路を形成したことを特徴とする。
かかる構成によれば、分離部に複数のラビリンス通路が形成されるため、分離部を流通する単位時間当たりの液体流量を同一にした場合、液体流通速度が低下される。このため、液体がラビリンス通路をゆっくりと通過し、液体の流れに乗って未分離の浮遊物及び沈降物が外部に排出されてしまうことが抑制され、その分離性が一層向上する。
【００１４】
請求項３記載の発明では、有機物をメタン及び二酸化炭素に分解する嫌気性微生物が自己造粒した担体の必要最小保有量を静置する担体静置保有層を底部に設けたことを特徴とする。
【００１５】
かかる構成によれば、担体静置保有層内に供給された液体は、ここを上昇するときに、嫌気性微生物により含有する有機物がメタン及び二酸化炭素に分解される。そして、メタン及び二酸化炭素は、液体に付随してラビリンス通路を蛇行しつつ流通するときに、液体から分離され、傾斜板の下面に沿って上昇し、開口部を通って浮遊部へと移行される。一方、液体に付随して分離部に供給された嫌気性微生物は、液体より比重が重いことから、傾斜板の上面に沿って下降し、開口部を通って沈降部へと移行される。このため、嫌気性微生物，メタン及び二酸化炭素が液体と共に外部に排出されることを抑制しつつ、有機物の分解性能が向上される。
【００１６】
【発明の実施の形態】
以下、添付された図面を参照して本発明を詳述する。
図１は、本発明に係る分離装置の第１実施形態として、工場廃水などの液体から浮遊物及び沈降物を分離する分離槽の全体構成を示す。
【００１７】
分離槽１の槽本体１Ａは、天板１ａと、側板１ｂと、鉛直下方が小に形成された栽頭錐体形状の底板１ｃと、を含んで構成される。ここで、槽本体１Ａの横断面形状は、敷地面積当たりの容積を確保するときには略四角形、耐圧能力を向上させるときには略円形とすることが望ましい。
【００１８】
槽本体１Ａ内部には、略鉛直方向に延びつつ略同心に配置される筒形状の内側隔壁２及び外側隔壁３により、横断面の中心から外方に向けて略同心に３つの領域、具体的には、浮遊部４，分離部５及び沈降部６が夫々形成される。即ち、内側隔壁２及び外側隔壁３により、分離部５を挟んで浮遊部４及び沈降部６が区画形成される。
【００１９】
浮遊部４は、内側隔壁２により区画された筒状領域から形成され、液体から分離された浮遊物を鉛直上方に浮遊上昇させて収容する。また、沈降部６は、外側隔壁３と槽本体１Ａの側板１ｂとにより区画された環状領域から形成され、液体から分離された沈降物を鉛直下方に沈降下降させて収容する。
【００２０】
分離部５は、鉛直上方が小に形成された栽頭錐体形状の薄板部材を鉛直方向に複数列設することで、図示するように、軸心を通る縦断面において、浮遊部４に向かって鉛直上方に傾斜した傾斜板５Ａが所定間隔を隔てつつ略平行に複数積層された形状に形成される。また、隣接する傾斜板５Ａの異なる位置、図示の例では、隣接する傾斜板５Ａの一方の外端部、及び、他方の内端部を夫々切り欠いて液体流通口を開設することで、傾斜板５Ａにより蛇行するラビリンス通路７が形成される。なお、傾斜板５Ａの一部を切り欠く代わりに、内径及び外径が異なる大小２種類の栽頭錐体形状の薄板部材を互い違いに積層して液体流通口が開設するようにしてもよい。さらに、傾斜板５Ａが接続される内側隔壁２の直下には、傾斜板５Ａの下面に沿って浮遊上昇した浮遊物を浮遊部４に移行させるべく、分離部５と浮遊部４とを連通させる開口部８が形成される。一方、傾斜板５Ａが接続される外側隔壁３の直上には、傾斜板５Ａの上面に沿って沈降下降した沈降物を沈降部６に移行させるべく、分離部５と沈降部６とを連通させる開口部９が形成される。
【００２１】
また、槽本体１Ａの下部には、ラビリンス通路７の入口部７Ａ付近に向けて、浮遊物及び沈降物を含んだ液体を供給する液体供給部１０が配設される。液体供給部１０は、上面に液体供給孔１１Ａが複数形成された環状管１１と、環状管１１に液体を導入する液体導入管１２と、を含んで構成される。
【００２２】
さらに、最下部に位置する傾斜板５Ａの外端部には、液体供給部１０から供給された液体と沈降部６を下降した沈降物とが混合することを抑制するため、槽本体１Ａの底板１ｃと略平行に延びる、鉛直下方が小に形成された栽頭錐体形状の混合抑制部材１３が接続される。このように、混合抑制部材１３を設けることで、沈降部６を沈降下降した沈降物が、液体供給部１０からの液流により分離部５に再度供給されることが防止され、沈降物の分離性の低下を防止することができる。
【００２３】
その他、槽本体１Ａの側板１ｂの上部内周面には、分離部５により浮遊物及び沈降物が分離された液体（処理水）を外部に排出する処理水排出部１４が取り付けられる。即ち、断面が略Ｌ字形状の樋状部材１５が、側板１ｂの上部内周面全体に亘り固定され、処理水排出管１６を介して、その縦部材を越えて流入した処理水が外部に排出される。
【００２４】
次に、かかる構成からなる分離槽１の作用について説明する。
液体供給部１０からラビリンス通路７の入口部７Ａに向けて供給された液体は、ラビリンス通路７内を上向流にて流通して槽本体１Ａの上部に至り、処理水排出部１４から外部に排出される。液体がラビリンス通路７内を流通するときに、その流路が蛇行するため、液体が分離部５を短絡的に通過せず、液体中の浮遊物は傾斜板５Ａの下面に沿って浮遊上昇し、内側隔壁２の開口部８を通って浮遊部４に移行される。浮遊部４に移行した浮遊物は、液体より比重が軽いことから、鉛直上方に上昇して浮遊部４の上部に収容される。浮遊部４の上部に収容された浮遊物は、例えば、スカム除去装置により処理される。
【００２５】
一方、液体中の沈降物は傾斜板５Ａの上面に沿って沈降下降し、外側隔壁３の開口部９を通って沈降部６に移行される。沈降部６に移行した沈降物は、液体より比重が重いことから、鉛直下方に下降して混合抑制部材１３と底板１ｃとの間隙を通って、槽本体１Ａの下部に収容される。槽本体１Ａの下部に収容された沈降物は、例えば、沈殿物処理装置により処理される。
【００２６】
従って、液体から浮遊物及び沈降部を分離する分離部５は、積層された傾斜板５Ａによりラビリンス通路７が形成されるため、液体が分離部５を短絡的に通過して外部に排出されることが防止される。このとき、液体が蛇行しつつラビリンス通路７内を流通するため、液体中の浮遊物は傾斜板５Ａの下面に沿って上昇し、内側隔壁２の開口部８を通って浮遊部４へと移行される。一方、液体中の沈降物は、傾斜板５Ａの上面に沿って下降し、外側隔壁３の開口部９を通って沈降部６へと移行される。このため、浮遊物及び沈降物が未分離である液体が、処理水排出部１４から外部に排出されることが極力抑制され、分離性を向上させることができる。
【００２７】
図２は、本発明の第２実施形態を示す。
本実施形態は、傾斜板５Ａの異なる２位置に液体流通口を形成することで、２経路のラビリンス通路１７及び１８を形成したものである。即ち、隣接する傾斜板５Ａの一方には、その中間部に２つの液体流通口が形成され、傾斜板５Ａの他方には、その内端部及び外端部を切り欠くことで、２つの液体流通口が形成される。このようにすると、隣接する傾斜板５Ａの液体流通口が略一直線上に配置されないことから、分離部５には蛇行する２つのラビリンス通路１７及び１８が形成されることとなる。なお、傾斜板５Ａに形成する液体流通口を３つ以上形成し、ラビリンス通路が複数形成されるようにしてもよい。また、先の第１実施形態と同様に、最下部に位置する傾斜板５Ａの外端部に、混合抑制部材１３を接続するようにしてもよい。
【００２８】
かかる構成によれば、分離部５を流通する単位時間当たりの液体流量を同一にした場合、ラビリンス通路が複数形成されることから、先の第１実施形態と比較して液体流通速度を低下させることができる。このため、液体がラビリンス通路１７及び１８をゆっくりと流通するから、液体の流れに乗って未分離の浮遊物及び沈降物が分離部５から処理水排出部１４に導入されてしまうことが抑制される。従って、浮遊物及び沈降物の分離性を一層向上させることができる。
【００２９】
なお、以上説明した各実施形態では、栽頭錐体形状の薄板部材により傾斜板５Ａを形成したが、槽本体１Ａを２つの平板形状の隔壁により３つの領域に区画し、中央部に位置する領域に平板，波板又は梯形板形状の傾斜板５Ａを略平行に複数積層して分離部５を形成するようにしてもよい。また、浮遊物及び沈降物を供給する液体供給部１０は、槽本体１Ａの上部から下方に向けて、ラビリンス通路の入口部付近に供給するようにしてもよい。この場合には、分離部５のラビリンス通路を液体が下向流で蛇行しながら流通するときに、同様な作用により、浮遊物及び沈降物が分離される。そして、槽本体１Ａの上部から下方に向けて液体を供給する構成においては、混合抑制部材１３により、浮遊部４を上昇した浮遊物と液体との混合が抑制される。
【００３０】
さらに、槽本体１Ａの下部から上方に向けて液体を供給する構成において、その底部に、嫌気性微生物が自己造粒した担体の必要最小量を静置する担体静置保有層を設け、液体中の有機物を嫌気性微生物の作用で浮遊物としてのメタン及び二酸化炭素に分解するようにしてもよい。
【００３１】
この場合、担体静置保有層内に供給された液体は、ここを上昇するときに、嫌気性微生物によって含有する有機物がメタン及び二酸化炭素に分解される。そして、メタン及び二酸化炭素は、液体に付随して分離部５のラビリンス通路を蛇行しつつ流通するときに、液体から分離され、傾斜板５Ａの下面に沿って上昇し、内側隔壁２の開口部８を通って浮遊部４へと移行される。このため、メタン及び二酸化炭素が未分離の処理水が、処理水排出部１４から外部に排出されることが抑制される。一方、液体に付随して分離部５に供給された嫌気性微生物は、液体より比重が重いことから沈降性を有するため、傾斜板５Ａの上面に沿って下降し、外側隔壁３の開口部９を通って沈降部６へと移行される。沈降部６へと移行した嫌気性微生物は、底板１ｃの内面に沿って槽本体１Ａの下部に集められ、担体静置保有層へと戻される。
【００３２】
かかる構成によれば、嫌気性微生物，メタン及び二酸化炭素が液体と共に外部に排出されることを抑制しつつ、有機物の分解性能を向上させることができる。
【００３３】
【発明の効果】
以上説明したように、請求項１記載の発明によれば、液体から浮遊物及び沈降物を分離する分離部は、積層された傾斜板によりラビリンス通路が形成されるため、液体が分離部を短絡的に通過して外部に排出されることが防止される。このとき、液体が蛇行しつつラビリンス通路内を流通するため、液体中の浮遊物は傾斜板の下面に沿って上昇し、開口部を通って浮遊部へと移行される。一方、液体中の沈降物は、傾斜板の上面に沿って下降し、開口部を通って沈降部へと移行される。このため、浮遊物及び沈降物が未分離である液体が、そのまま外部に排出されることが極力抑制され、分離性を向上させることができる。
また、傾斜板が裁頭錐体形状の薄板からなるため、分離部の体積が増大し、単位時間当たりの浮遊物及び沈降物の分離性能を向上させることができる。さらに、液体供給部から供給された液体と沈降部を下降した沈降物とが混合することを抑制する混合抑制部材が設けられているため、沈降部を下降した沈降物が、液体供給部からの液流により分離部に再度供給されることが防止され、浮遊物及び沈降物の分離性の低下を抑制することができる。その他、浮遊物及び沈降物の分離性能を確保しつつ、装置のコンパクト化を促進することができる。
【００３４】
請求項２記載の発明によれば、液体がラビリンス通路をゆっくりと通過するから、液体の流れに乗って未分離の浮遊物及び沈降物が外部に排出されてしまうことが抑制され、その分離性を一層向上させることができる。
【００３７】
請求項３記載の発明によれば、嫌気性微生物，メタン及び二酸化炭素が液体と共に外部に排出されることを抑制しつつ、有機物の分解性能を向上させることができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態を示す分離槽の縦断面図
【図２】本発明の第２実施形態を示す分離槽の縦断面図
【符号の説明】
２内側隔壁
３外側隔壁
４浮遊部
５分離部
５Ａ傾斜板
６沈降部
７ラビリンス通路
７Ａ入口部
８開口部
９開口部
１０液体供給部
１３混合抑制部材
１７ラビリンス通路
１８ラビリンス通路[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a separation apparatus that separates suspended matter and sediment from a liquid, and more particularly, to a technique that improves separation.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a separation device that separates suspended matter and sediment from a liquid such as factory waste water containing the suspended matter and sediment is known. As such a separating device, a plurality of inclined plates are arranged in parallel at intervals, and when a liquid passes between the inclined plates, the floating material is raised along the lower surface of the inclined plate, while the floating material is moved along the upper surface. There are various types in which the sediment is lowered to separate the two.
[0003]
For example, what is disclosed in Patent Document 1 is that a plurality of hollow plates formed with a number of hollow portions along a liquid flow direction are inclined and arranged in a fluid flow path. A floating sedimentation effect is produced by the mutual interval. What is disclosed in Patent Document 2 is a laminate in which a wave-like inclined plate and a perforated flat plate are alternately laminated and inclined in a liquid flow path. What is disclosed in Patent Document 3 is a tubular member of a plurality of inclined pipes or a plate-like shape of a plurality of inclined plates in the treated water outflow portion of the raw water inflow portion and the treated water outflow portion partitioned by a partition in the treatment tank. A module in which members are overlapped at intervals is disposed to provide a sedimentation separation member. In addition, as a separation device using an inclined plate, there are those disclosed in Patent Document 4 and Patent Document 5.
[0004]
[Patent Document 1]
JP 52-11473 A (page 2-3, FIG. 1-3)
[Patent Document 2]
JP 55-124504 A (2nd page, Fig. 1-2)
[Patent Document 3]
JP-A-61-257295 (page 2-3, FIG. 1-2)
[Patent Document 4]
Japanese Patent Laid-Open No. 11-300109 (FIG. 4)
[Patent Document 5]
JP 2002-159990 A (FIG. 1)
[0005]
[Problems to be solved by the invention]
However, the prior art separation device simply arranges a plurality of inclined plates with a gap therebetween in a substantially parallel manner, and while the liquid supplied thereto flows between the inclined plates, suspended matter is suspended along the lower surface of the inclined plates. While it is configured to separate the suspended matter and sediment by lowering the sediment along its upper surface, the separation path of the supplied liquid is linear and the liquid is separated vigorously Easy to flow through the passage. As a result, the liquid is short-circuited toward the discharge part, and the suspended matter and sediment are discharged together, the sediment is collected at the suspended part, or the suspended matter is collected at the sedimented part. As a result, suspended matter and sediment could not be effectively separated, and the separability was poor.
[0006]
Therefore, in view of the conventional problems as described above, the present invention is configured such that the separation path of the supplied liquid is a meandering labyrinth path, so that the liquid is prevented from short-circuiting toward the discharge portion and separated. An object of the present invention is to provide a separation device that improves the performance.
[0007]
[Means for Solving the Problems]
For this reason, in the first aspect of the present invention, the cylindrical partition walls arranged substantially concentrically while extending in a substantially vertical direction are floated on the inner periphery and outer periphery of the separation portion so as to communicate with each other at the lower portion. the parts and settling section and each compartment formed in the separation unit, the stacking inclined plate comprising a thin plate of truncated cone shape which is inclined vertically upward toward the floating portion in substantially parallel with a predetermined interval, A liquid circulation port is formed at a different position of an adjacent inclined plate to form a labyrinth passage, and a partition that partitions the floating portion and is directly below the connecting portion with the inclined plate, and a partition that partitions the settling portion Then, immediately above the connection part with the inclined plate, each of the opening part for communicating the separating part and the floating part and the sinking part is formed, near the entrance part of the labyrinth passage, vertically upward from the lower part, Includes float and sediment A liquid supply portion for supplying liquid is provided, in order to suppress mixing the sediment descends the settling section and supplied liquid from the liquid supply section, from the outer end portion of the inclined plate located at the bottom A cylindrical mixing suppression member extending to the lower side of the liquid supply unit is provided .
[0008]
According to such a configuration, the liquid supplied from the liquid supply unit to the vicinity of the inlet of the labyrinth passage flows upward in the labyrinth passage. At this time, since the liquid flow path meanders, the liquid does not pass through the separation part in a short-circuited manner, and the suspended matter in the liquid rises along the lower surface of the inclined plate and moves to the floating part through the opening. Is done. Since the floating part that has moved to the floating part has a lower specific gravity than the liquid, it rises vertically upward and is accommodated in the upper part of the floating part. The floating substance accommodated in the upper part of the floating part is processed by, for example, a scum removing device. On the other hand, the sediment in the liquid descends along the upper surface of the inclined plate and is transferred to the sedimentation section through the opening. Since the sediment that has moved to the settling portion has a specific gravity heavier than that of the liquid, it descends vertically downward and is stored in the lower portion of the settling portion. The sediment accommodated in the lower part of the sedimentation part is processed by a sediment processing apparatus, for example.
Further, since the inclined plate is made of a truncated cone-shaped thin plate, the volume of the separation portion is increased, and the separation performance of suspended matter and sediment per unit time is improved. Furthermore, since the mixing suppression member which suppresses mixing with the liquid supplied from the liquid supply part and the sediment which descended the sedimentation part is provided, the sediment which descended the sedimentation part is from the liquid supply part. The liquid is prevented from being supplied again to the separation unit, and the decrease in the separation of suspended matter and sediment is suppressed. In addition, downsizing of the apparatus is promoted while ensuring the separation performance of suspended matter and sediment.
[0009]
The invention according to claim 2 is characterized in that a plurality of labyrinth passages are formed by opening liquid circulation ports at a plurality of positions of the inclined plate.
According to this configuration, since a plurality of labyrinth passages are formed in the separation unit, the liquid flow rate is reduced when the liquid flow rate per unit time flowing through the separation unit is the same. For this reason, it is suppressed that a liquid passes slowly through a labyrinth passage, gets on the flow of the liquid, and an unseparated floating matter and sediment are discharged outside, and the separation nature further improves.
[0014]
The invention according to claim 3 is characterized in that a carrier stationary holding layer is provided at the bottom for statically holding a necessary minimum holding amount of a carrier self-granulated by anaerobic microorganisms that decompose organic substances into methane and carbon dioxide. .
[0015]
According to such a configuration, when the liquid supplied into the stationary carrier holding layer rises, the organic matter contained by the anaerobic microorganisms is decomposed into methane and carbon dioxide. When methane and carbon dioxide flow along the labyrinth passage along with the liquid, they are separated from the liquid, rise along the lower surface of the inclined plate, and are transferred to the floating portion through the opening. The On the other hand, since the anaerobic microorganisms supplied to the separation unit accompanying the liquid have a higher specific gravity than the liquid, the anaerobic microorganisms descend along the upper surface of the inclined plate and are transferred to the sedimentation unit through the opening. For this reason, the decomposition | disassembly performance of organic substance is improved, suppressing that anaerobic microorganisms, methane, and a carbon dioxide are discharged | emitted with a liquid outside.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows the overall configuration of a separation tank for separating suspended matter and sediment from a liquid such as factory wastewater as a first embodiment of a separation apparatus according to the present invention.
[0017]
A tank body 1A of the separation tank 1 includes a top plate 1a, a side plate 1b, and a bottom cone 1c having a truncated cone shape in which a vertically lower portion is formed small. Here, it is desirable that the cross-sectional shape of the tank body 1A is approximately a square when securing the volume per site area, and approximately a circle when improving the pressure resistance.
[0018]
Inside the tank body 1A, there are three regions that are substantially concentrically extending outward from the center of the cross section by a cylindrical inner partition wall 2 and an outer partition wall 3 that extend substantially vertically and are concentrically arranged. The floating part 4, the separation part 5 and the settling part 6 are formed respectively. That is, the floating partition 4 and the sedimentation section 6 are partitioned by the inner partition 2 and the outer partition 3 with the separation unit 5 interposed therebetween.
[0019]
The floating portion 4 is formed from a cylindrical region partitioned by the inner partition wall 2 and accommodates the floating matter separated from the liquid by floating upward in the vertical direction. Moreover, the sedimentation part 6 is formed from the cyclic | annular area | region divided by the outer side partition 3 and the side plate 1b of the tank main body 1A, and accommodates the sediment isolate | separated from the liquid by descent | falling down vertically.
[0020]
As shown in the figure, the separation unit 5 is arranged in a vertical direction passing through the axis toward the floating unit 4 by arranging a plurality of thin plate members having a truncated cone shape in the vertical direction. Thus, the inclined plate 5A inclined vertically upward is formed in a shape in which a plurality of inclined plates are stacked substantially in parallel with a predetermined interval. In addition, in the example shown in the drawing, different positions of the adjacent inclined plates 5A, one outer end portion of the adjacent inclined plate 5A, and the other inner end portion are cut out to open a liquid circulation port, thereby A serpentine labyrinth passage 7 is formed by the plate 5A. In addition, instead of notching a part of the inclined plate 5A, two types of thin and thin cone-shaped thin plate members having different inner diameters and outer diameters may be alternately stacked to open the liquid circulation port. Further, immediately below the inner partition wall 2 to which the inclined plate 5A is connected, the separating unit 5 and the floating unit 4 are communicated so that the suspended matter floating and rising along the lower surface of the inclined plate 5A is transferred to the floating unit 4. An opening 8 is formed. On the other hand, the separation part 5 and the sedimentation part 6 are communicated directly above the outer partition 3 to which the sloped plate 5A is connected so that the sediment that has settled down along the upper surface of the sloped plate 5A is transferred to the sedimentation part 6. An opening 9 is formed.
[0021]
In addition, a liquid supply unit 10 that supplies liquid containing suspended matter and sediment is disposed near the inlet portion 7A of the labyrinth passage 7 at the lower portion of the tank body 1A. The liquid supply unit 10 includes an annular tube 11 having a plurality of liquid supply holes 11 A formed on the upper surface, and a liquid introduction tube 12 that introduces liquid into the annular tube 11.
[0022]
Furthermore, in order to suppress mixing of the liquid supplied from the liquid supply unit 10 and the sediment descending the settling unit 6 at the outer end of the inclined plate 5A located at the bottom, the bottom plate of the tank body 1A. A mixture suppression member 13 having a truncated cone shape extending substantially parallel to 1c and having a small vertical bottom is connected. Thus, by providing the mixing suppression member 13, the sediment that has descended and descended from the sedimentation section 6 is prevented from being supplied again to the separation section 5 due to the liquid flow from the liquid supply section 10, thereby separating the sediment. The fall of property can be prevented.
[0023]
In addition, the treated water discharge part 14 which discharges | emits the liquid (process water) from which the floating substance and the sediment were isolate | separated by the separation part 5 to the upper inner peripheral surface of the side plate 1b of 1 A of tank main bodies is attached. That is, the bowl-shaped member 15 having a substantially L-shaped cross section is fixed over the entire upper inner peripheral surface of the side plate 1b, and the treated water that has flowed in through the longitudinal member via the treated water discharge pipe 16 to the outside. Discharged.
[0024]
Next, the operation of the separation tank 1 having such a configuration will be described.
The liquid supplied from the liquid supply unit 10 toward the inlet portion 7A of the labyrinth passage 7 flows in the labyrinth passage 7 in an upward flow to reach the upper portion of the tank body 1A, and from the treated water discharge portion 14 to the outside. Discharged. When the liquid flows through the labyrinth passage 7, the flow path meanders, so that the liquid does not pass through the separation unit 5 in a short circuit, and the suspended matter in the liquid floats and rises along the lower surface of the inclined plate 5 A. Then, it is transferred to the floating portion 4 through the opening 8 of the inner partition 2. The suspended matter transferred to the floating portion 4 has a specific gravity lighter than that of the liquid, and therefore rises vertically upward and is accommodated in the upper portion of the floating portion 4. The floating substance accommodated in the upper part of the floating part 4 is processed by a scum removing device, for example.
[0025]
On the other hand, the sediment in the liquid settles down along the upper surface of the inclined plate 5 A and passes through the opening 9 of the outer partition 3 and is transferred to the sedimentation section 6. The sediment that has moved to the sedimentation section 6 has a specific gravity heavier than that of the liquid, and thus descends vertically downward and is accommodated in the lower portion of the tank body 1A through the gap between the mixing suppression member 13 and the bottom plate 1c. The sediment accommodated in the lower part of the tank body 1A is processed by, for example, a sediment processing device.
[0026]
Accordingly, in the separation unit 5 that separates the suspended matter and the settling part from the liquid, the labyrinth passage 7 is formed by the stacked inclined plates 5A, so that the liquid passes through the separation part 5 in a short circuit and is discharged to the outside. It is prevented. At this time, since the liquid circulates in the labyrinth passage 7 while meandering, the floating substance in the liquid rises along the lower surface of the inclined plate 5A and moves to the floating part 4 through the opening 8 of the inner partition 2. Is done. On the other hand, the sediment in the liquid descends along the upper surface of the inclined plate 5 A and moves to the sedimentation section 6 through the opening 9 of the outer partition wall 3. For this reason, it is suppressed as much as possible that the liquid from which the suspended matter and the sediment have not been separated is discharged to the outside from the treated water discharge portion 14, and the separability can be improved.
[0027]
FIG. 2 shows a second embodiment of the present invention.
In the present embodiment, two passage labyrinth passages 17 and 18 are formed by forming liquid circulation ports at two different positions of the inclined plate 5A. That is, two liquid circulation ports are formed in one of the adjacent inclined plates 5A, and two liquid flow ports are formed in the other of the inclined plates 5A by cutting out the inner end portion and the outer end portion thereof. A distribution port is formed. If it does in this way, since the liquid circulation port of the adjacent inclination board 5A is not arrange | positioned on a substantially straight line, the two labyrinth passages 17 and 18 which meander in the isolation | separation part 5 will be formed. Note that three or more liquid circulation ports formed in the inclined plate 5A may be formed so that a plurality of labyrinth passages are formed. Moreover, you may make it connect the mixing suppression member 13 to the outer end part of 5 A of inclination boards located in the lowest part similarly to previous 1st Embodiment.
[0028]
According to such a configuration, when the liquid flow rate per unit time flowing through the separation unit 5 is the same, a plurality of labyrinth passages are formed, so that the liquid flow rate is reduced as compared with the first embodiment. be able to. For this reason, since the liquid slowly circulates through the labyrinth passages 17 and 18, it is suppressed that unseparated suspended matter and sediment are introduced from the separation unit 5 to the treated water discharge unit 14 by riding on the liquid flow. The Therefore, the separability of suspended matter and sediment can be further improved.
[0029]
In each of the embodiments described above, the inclined plate 5A is formed by the truncated cone-shaped thin plate member. However, the tank main body 1A is divided into three regions by two flat plate-shaped partition walls, and is positioned at the center. The separation portion 5 may be formed by laminating a plurality of flat plates, corrugated plates, or trapezoidal inclined plates 5A in the region. Moreover, you may make it supply the liquid supply part 10 which supplies a suspended solid and sediment to the entrance part vicinity of a labyrinth channel | path toward the downward direction from the upper part of 1 A of tank main bodies. In this case, when the liquid circulates in the labyrinth passage of the separation unit 5 while meandering, the suspended matter and the sediment are separated by the same action. And in the structure which supplies a liquid toward the downward direction from the upper part of 1 A of tank main bodies, the mixing with the floating substance which raised the floating part 4 and the liquid is suppressed by the mixing suppression member 13. FIG.
[0030]
Further, in the configuration in which the liquid is supplied upward from the lower part of the tank body 1A, a carrier stationary holding layer is provided at the bottom of the tank main body so that the necessary minimum amount of the carrier self-granulated by the anaerobic microorganisms is disposed. These organic substances may be decomposed into methane and carbon dioxide as suspended substances by the action of anaerobic microorganisms.
[0031]
In this case, the organic substance contained by the anaerobic microorganisms is decomposed into methane and carbon dioxide when the liquid supplied into the carrier stationary holding layer ascends here. Then, when methane and carbon dioxide flow along with the liquid while meandering through the labyrinth passage of the separation unit 5, the methane and carbon dioxide are separated from the liquid and rise along the lower surface of the inclined plate 5 A. 8 is passed to the floating part 4. For this reason, it is suppressed that the treated water from which methane and carbon dioxide have not been separated is discharged from the treated water discharge unit 14 to the outside. On the other hand, the anaerobic microorganisms supplied to the separation unit 5 along with the liquid has a sedimentation property because it has a higher specific gravity than the liquid, and therefore descends along the upper surface of the inclined plate 5A, and the opening 9 of the outer partition wall 3. It moves to the sedimentation part 6 through. Anaerobic microorganisms that have migrated to the settling portion 6 are collected along the inner surface of the bottom plate 1c at the bottom of the tank body 1A and returned to the carrier stationary holding layer.
[0032]
According to such a configuration, it is possible to improve the decomposition performance of organic substances while suppressing the anaerobic microorganisms, methane and carbon dioxide from being discharged together with the liquid.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, the separator that separates the suspended matter and the sediment from the liquid has a labyrinth passage formed by the laminated inclined plates, so that the liquid short-circuits the separator. It is prevented from passing through and being discharged to the outside. At this time, since the liquid circulates in the labyrinth passage while meandering, the floating matter in the liquid rises along the lower surface of the inclined plate and is transferred to the floating portion through the opening. On the other hand, the sediment in the liquid descends along the upper surface of the inclined plate, and moves to the sedimentation section through the opening. For this reason, it is suppressed as much as possible that the liquid from which the suspended | floating matter and sediment are unseparated is discharged | emitted outside as it is, and it can improve separability.
In addition, since the inclined plate is made of a truncated cone-shaped thin plate, the volume of the separation portion is increased, and the separation performance of suspended matter and sediment per unit time can be improved. Furthermore, since the mixing suppression member which suppresses mixing with the liquid supplied from the liquid supply part and the sediment which descended the sedimentation part is provided, the sediment which descended the sedimentation part is from the liquid supply part. The liquid is prevented from being supplied again to the separation unit, and a decrease in the separation of suspended matter and sediment can be suppressed. In addition, downsizing of the apparatus can be promoted while ensuring the separation performance of the suspended matter and the sediment.
[0034]
According to the second aspect of the present invention, since the liquid slowly passes through the labyrinth passage, it is possible to prevent the unseparated suspended matter and sediment from being discharged to the outside by riding on the flow of the liquid. Can be further improved.
[0037]
According to invention of Claim 3 , the decomposition | disassembly performance of organic substance can be improved, suppressing that anaerobic microorganisms, methane, and a carbon dioxide are discharged | emitted with a liquid outside.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a separation tank showing a first embodiment of the present invention. FIG. 2 is a longitudinal sectional view of a separation tank showing a second embodiment of the present invention.
2 Inner partition 3 Outer partition 4 Floating part 5 Separating part 5A Inclined plate 6 Sedimentation part 7 Labyrinth passage 7A Inlet part 8 Opening part 9 Opening part 10 Liquid supply part 13 Mixing suppression member 17 Labyrinth passage 18 Labyrinth passage

Claims

The substantially vertical direction in the cylindrical shape is arranged substantially concentrically with extending partition wall so as to communicate with each other at the bottom, a floating portion and precipitated portion was respectively partitioned and formed on the inner peripheral and outer peripheral sides of the separating unit, the In the separator, an inclined plate made of a truncated cone-shaped thin plate that is inclined vertically upward toward the floating portion is stacked substantially in parallel with a predetermined interval therebetween, and the liquid circulation port is located at a different position of the adjacent inclined plate. While forming a labyrinth passage,
A partition partitioning the floating portion and immediately below the connecting portion with the inclined plate, and a partition partitioning the settling portion and directly above the connecting portion with the inclined plate, the separating portion, the floating portion and the sinking portion Each has an opening that communicates with
In the vicinity of the entrance portion of the labyrinth passage, a liquid supply portion is provided for supplying a liquid containing suspended matter and sediment from the lower portion vertically upward ,
In order to suppress mixing of the liquid supplied from the liquid supply unit and the sediment descending the settling unit, a cylindrical shape extending from the outer end of the inclined plate located at the lowermost part to the lower part of the liquid supply unit A separation apparatus comprising a mixing suppression member .

2. The separation apparatus according to claim 1, wherein a plurality of labyrinth passages are formed by opening liquid circulation ports at a plurality of positions of the inclined plate.

3. A carrier stationary holding layer is provided at the bottom of the carrier, wherein a minimum required amount of a carrier self-granulated by anaerobic microorganisms that decompose organic matter into methane and carbon dioxide is provided at the bottom. The separation device described.