【０００１】[0001]
【産業上の利用分野】本発明は、槽内において固液分離
を浸漬型濾過装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an immersion type filtration apparatus for solid-liquid separation in a tank.
【０００２】[0002]
【従来の技術】従来、水処理において濾過装置を用いる
構成としては、例えば図２に示すようなものがある。図
２において、反応槽１には原水供給管２を通して下水、
し尿等の原水が流入し、原水は反応槽１内の活性汚泥と
混合して混合液３を形成する。また、ブロアー４により
空気５を送気管６を通して散気装置７に供給し、散気装
置７から上方に向けて空気５を曝気する。この曝気によ
って混合液３中に酸素を供給するとともに、空気５のエ
アリフト作用により生起する上昇攪拌流によって反応槽
１内の混合液３を攪拌混合しながら槽内で循環させる。2. Description of the Related Art Conventionally, as a configuration using a filtration device in water treatment, there is a configuration as shown in FIG. 2, for example. In FIG. 2, sewage is supplied to a reaction tank 1 through a raw water supply pipe 2.
Raw water such as night soil flows in, and the raw water mixes with the activated sludge in the reaction tank 1 to form a mixed solution 3. Further, the air 5 is supplied by the blower 4 to the air diffuser 7 through the air supply pipe 6, and the air 5 is aerated upward from the air diffuser 7. Oxygen is supplied into the mixed solution 3 by this aeration, and the mixed solution 3 in the reaction tank 1 is circulated in the reaction tank 1 while being stirred and mixed by an ascending flow generated by the air lift action of the air 5.
【０００３】一方、膜分離ユニット８によって反応槽１
内の混合液３を固液分離し、膜分離ユニット８の濾過膜
を透過した透過液は処理水９として吸引ポンプ１０によ
り吸引管１１を通して処理水槽１２に取り出す。On the other hand, the reaction tank 1 is
The mixed solution 3 in the inside is solid-liquid separated, and the permeate that has passed through the filtration membrane of the membrane separation unit 8 is taken out as treatment water 9 into a treatment water tank 12 through a suction pipe 11 by a suction pump 10.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記した従来
の構成において、反応槽１内の混合液３を固液分離する
ためには、吸引ポンプ１０によって膜分離ユニット８に
負圧を与える必要がある。この負圧は膜分離ユニット８
における透過流束（Fluxフラックス）に応じて制御する
ものであるが、膜面にケーキ層が形成されると透過流束
が低下するので、負圧を高める必要があり、吸引ポンプ
１０の駆動に伴うランニングコストが高くなる問題があ
った。However, in the above-mentioned conventional configuration, it is necessary to apply a negative pressure to the membrane separation unit 8 by the suction pump 10 in order to separate the liquid mixture 3 in the reaction tank 1 into solid and liquid. is there. This negative pressure is applied to the membrane separation unit 8
Is controlled in accordance with the permeation flux (Flux flux) at the time, but when the cake layer is formed on the membrane surface, the permeation flux decreases, so that it is necessary to increase the negative pressure, and it is necessary to drive the suction pump 10 There was a problem that the running cost was high.
【０００５】本発明は上記課題を解決するもので、吸引
ポンプを用いることなく、かつ別途に動力を必要とする
ことなく槽内の被処理水を固液分離することができる浸
漬型濾過装置を提供することを目的とする。[0005] The present invention solves the above-mentioned problems, and provides an immersion-type filtration apparatus capable of separating solid-liquid water to be treated in a tank without using a suction pump and without requiring separate power. The purpose is to provide.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、本発明の浸漬型濾過装置は、被処理水が流入する膜
分離槽内に膜分離ユニットを適当水深下に浸漬配置し、
集水口が膜分離ユニットより上方の適当位置に開口する
オーバーフロー管を設け、基端側が膜分離ユニットの透
過液流路に連通するとともに、先端側が膜分離槽の外部
において膜分離槽液面より下方位置に開口する取出管を
設けた構成としたものである。Means for Solving the Problems To solve the above problems, the immersion type filtration apparatus of the present invention comprises a membrane separation unit immersed and disposed under a suitable depth in a membrane separation tank into which water to be treated flows.
An overflow pipe with a water inlet opening at an appropriate position above the membrane separation unit is provided, and the base end side communicates with the permeate flow path of the membrane separation unit, and the tip end side is below the liquid level of the membrane separation tank outside the membrane separation tank. This is a configuration in which a take-out pipe that opens at a position is provided.
【０００７】また、オーバーフロー管の集水口を上下に
昇降自在に設けた構成としたものである。また、取出管
の先端側に流量調整弁を設けた構成としたものである。Further, the water collecting port of the overflow pipe is provided so as to be vertically movable. Further, a flow control valve is provided on the distal end side of the extraction pipe.
【０００８】[0008]
【作用】上記した構成により、オーバーフロー管の集水
口を上限として膜分離槽内に被処理水を貯留し、膜分離
槽内の水位を集水口の位置を設定水位として維持する。
この状態において、膜分離ユニットには設定水位からの
水深に相応して水頭圧が作用するので、水頭圧を膜分離
ユニットの駆動圧力として膜分離槽内の被処理水を固液
分離し、膜分離ユニットの濾過膜を透過した透過液は取
出管を通して膜分離槽の外部に取り出す。したがって、
別途に外部から動力を加えることなく被処理水の固液分
離を行うことができる。According to the above-mentioned structure, the water to be treated is stored in the membrane separation tank with the water collection port of the overflow pipe as the upper limit, and the water level in the membrane separation tank is maintained at the position of the water collection port as the set water level.
In this state, since the head pressure acts on the membrane separation unit in accordance with the water depth from the set water level, the water to be treated in the membrane separation tank is solid-liquid separated by using the head pressure as the driving pressure of the membrane separation unit, and the membrane is separated. The permeated liquid that has passed through the filtration membrane of the separation unit is taken out of the membrane separation tank through an extraction pipe. Therefore,
The solid-liquid separation of the water to be treated can be performed without separately applying external power.
【０００９】また、集水口を昇降することにより膜分離
槽内の設定水位を変位させ、膜分離ユニットに加える水
頭圧を調整して、膜分離ユニットにおける透過流束を制
御する。[0009] Further, the set water level in the membrane separation tank is displaced by raising and lowering the water collecting port, and the head pressure applied to the membrane separation unit is adjusted to control the permeation flux in the membrane separation unit.
【００１０】また、流量調整弁を操作することにより膜
分離ユニット内に与える背圧を調整し、膜分離ユニット
における透過流束を制御する。Further, the back pressure applied to the membrane separation unit is adjusted by operating the flow control valve to control the permeation flux in the membrane separation unit.
【００１１】[0011]
【実施例】以下、本発明を水処理に適用した一実施例を
図面に基づいて説明するが、本発明は水処理に限られる
ものではなく、触媒や吸着剤の固液分離にも適用可能で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to water treatment will be described below with reference to the drawings. However, the present invention is not limited to water treatment and can be applied to solid-liquid separation of a catalyst and an adsorbent. It is.
【００１２】図１において、膜分離槽２１の内部には、
被処理水２２として下水やし尿等の原水と活性汚泥との
混合液を貯留しており、被処理水２２の適当水深下に膜
分離ユニット２３を浸漬配置している。この膜分離ユニ
ット２３は板状をなす複数の膜モジュールを適当間隙を
おいて上下方向に平行に配置したものであり、各膜モジ
ュールの透過液流路に連通して取出管２４を設けてい
る。Referring to FIG. 1, inside a membrane separation tank 21,
A mixed liquid of raw water such as sewage and human waste and activated sludge is stored as the water to be treated 22, and a membrane separation unit 23 is immersed and disposed below the water depth of the water to be treated 22. The membrane separation unit 23 has a plurality of plate-shaped membrane modules arranged in parallel in the vertical direction with an appropriate gap therebetween, and has an extraction pipe 24 which communicates with a permeate flow path of each membrane module. .
【００１３】この取出管２４は、基端側で膜分離ユニッ
ト２３の透過液流路に連通するとともに、先端側が流量
調整弁２４ａを介して膜分離槽２１の外部に連通してお
り、その先端開口２４ｂは膜分離槽液面ＳＬより下方に
位置している。また、取出管２４の先端開口２４ｂは処
理水貯留槽２５内に位置しており、処理水貯留槽２５に
はその水位を一定に維持する越流管２６を設けている。
尚、取出管２４は図１中に二点鎖線で示すようにサイホ
ン式に形成することも可能である。The outlet pipe 24 communicates with the permeate flow path of the membrane separation unit 23 at the base end, and communicates with the outside of the membrane separation tank 21 via the flow control valve 24a at the tip end. The opening 24b is located below the liquid surface SL of the membrane separation tank. Further, the leading end opening 24b of the discharge pipe 24 is located in the treated water storage tank 25, and the treated water storage tank 25 is provided with an overflow pipe 26 for maintaining the water level at a constant level.
The take-out tube 24 can be formed in a siphon type as shown by a two-dot chain line in FIG.
【００１４】膜分離槽２１の底部には開閉弁２７を介装
した汚泥引抜管２８が開口するとともに、膜分離ユニッ
ト２３の下方に位置して散気管２９を配置しており、散
気管２９には送気管３０を介してブロアー３１を接続し
ている。尚、散気管２９に代えて機械的な攪拌翼を持っ
た攪拌装置を設置することも可能である。At the bottom of the membrane separation tank 21, a sludge withdrawing pipe 28 provided with an on-off valve 27 is opened, and an air diffuser 29 is disposed below the membrane separation unit 23. Is connected to a blower 31 via an air supply pipe 30. In addition, it is also possible to install a stirring device having a mechanical stirring blade in place of the air diffusion tube 29.
【００１５】膜分離槽２１は隣接する流量調整槽３２に
オーバーフロー管３３を介して連通しており、オーバー
フロー管３３は集水口３３ａが膜分離槽２１内の膜分離
ユニット２３より上方の適当位置に開口し、排出口３３
ｂが流量調整槽３２内に開口している。また、オーバー
フロー管３３の途中には蛇腹部３３ｃを上下方向に伸縮
自在に設けており、集水口３３ａは上下に出退するシリ
ンダ装置３４が保持している。尚、オーバーフロー管３
３はゴムホース等の可撓性を有する部材で形成すること
も可能である。The membrane separation tank 21 communicates with an adjacent flow control tank 32 via an overflow pipe 33. The overflow pipe 33 has a water collecting port 33a at an appropriate position above the membrane separation unit 23 in the membrane separation tank 21. Open and outlet 33
b opens into the flow control tank 32. A bellows portion 33c is provided in the middle of the overflow pipe 33 so as to be vertically expandable and contractable, and the water collecting port 33a is held by a cylinder device 34 which moves up and down. The overflow pipe 3
3 can be formed of a flexible member such as a rubber hose.
【００１６】流量調整槽３２には上部に原水供給管３５
が開口し、底部に循環ポンプ３６を介装した循環管３７
が開口しており、循環管３７は先端側が膜分離槽２１内
で開口している。The raw water supply pipe 35 is provided at the upper part of the flow control tank 32.
Is opened, and a circulation pipe 37 with a circulation pump 36 interposed at the bottom
The circulation pipe 37 is open at the tip side in the membrane separation tank 21.
【００１７】以下、上記構成における作用を説明する。
流量調整槽３２において原水供給管３５から供給する原
水を一端貯留し、循環ポンプ３６により循環管３７を通
して膜分離槽２１に供給する。膜分離槽２１において
は、余剰な被処理水２２をオーバーフロー管３３を通し
て流量調整槽３２に戻すことにより、オーバーフロー管
３３の集水口３３ａを上限として被処理水２２を貯留
し、膜分離槽２１内の水位を集水口３３ａの位置を設定
水位として常に維持する。The operation of the above configuration will be described below.
The raw water supplied from the raw water supply pipe 35 is temporarily stored in the flow rate adjusting tank 32 and supplied to the membrane separation tank 21 through the circulation pipe 37 by the circulation pump 36. In the membrane separation tank 21, the excess water to be treated 22 is returned to the flow control tank 32 through the overflow pipe 33, so that the water to be treated 22 is stored up to the water collecting port 33 a of the overflow pipe 33, and the inside of the membrane separation tank 21 is stored. Is always maintained at the position of the water collecting port 33a as the set water level.
【００１８】一方、ブロアー３１により送気管３０を通
して散気管２９に空気を供給し、散気管２９から上方に
向けて曝気する。この曝気した空気のエアリフト作用に
より生起する上昇攪拌流によって、膜分離槽２１内の被
処理水２２を攪拌し、かつ槽内で循環させる。On the other hand, air is supplied from the blower 31 to the diffuser tube 29 through the gas supply tube 30, and aeration is performed upward from the diffuser tube 29. The to-be-processed water 22 in the membrane separation tank 21 is stirred and circulated in the tank by the ascending flow generated by the air lift action of the aerated air.
【００１９】この状態において、膜分離ユニット２３に
は設定水位ＳＬと取出管先端開口２４ｂとの差に相当す
る水頭圧が作用するので、水頭圧を膜分離ユニット２３
の駆動圧力として膜分離槽２１内の被処理水２２を固液
分離する。膜分離ユニット２３の濾過膜を透過した透過
液は取出管２４を通して膜分離槽２１の外部に取り出
し、処理水貯留槽２５に貯留する。また、膜分離ユニッ
ト２３の膜面に付着するケーキ層は上述の上昇攪拌流に
よって膜面から剥離させ、再び槽内で循環させる。In this state, a water head pressure corresponding to the difference between the set water level SL and the outlet pipe tip opening 24b acts on the membrane separation unit 23.
The water to be treated 22 in the membrane separation tank 21 is subjected to solid-liquid separation as the driving pressure of the above. The permeated liquid that has passed through the filtration membrane of the membrane separation unit 23 is taken out of the membrane separation tank 21 through the extraction pipe 24, and stored in the treated water storage tank 25. Further, the cake layer adhering to the membrane surface of the membrane separation unit 23 is separated from the membrane surface by the above-described agitated flow and circulated again in the tank.
【００２０】そして、膜分離ユニット２３における透過
流束を調整する場合（初期設定時や駆動圧力の不足時
等）には、シリンダ装置３４によって集水口３３ａを昇
降させることにより、膜分離槽２１内の設定水位ＳＬを
変位させ、膜分離ユニット２３に加える水頭圧を制御す
る。あるいは、取出管２４に介装した流量調整弁２４ａ
を操作することにより、膜分離ユニット２３内に与える
背圧を調整し、膜分離ユニット２３における透過流束を
制御する。When adjusting the permeation flux in the membrane separation unit 23 (for example, at the time of initial setting or when the driving pressure is insufficient), the water collecting port 33a is moved up and down by the cylinder device 34 so that the inside of the membrane separation tank 21 is adjusted. Is displaced, and the head pressure applied to the membrane separation unit 23 is controlled. Alternatively, the flow control valve 24a interposed in the extraction pipe 24
Is operated, the back pressure applied to the inside of the membrane separation unit 23 is adjusted, and the permeation flux in the membrane separation unit 23 is controlled.
【００２１】膜分離槽２１に残留する余剰汚泥等の固形
分は開閉弁２７を操作して汚泥引抜管２８を通して槽外
に排出する。The solid content such as excess sludge remaining in the membrane separation tank 21 is discharged to the outside of the tank through a sludge extraction pipe 28 by operating an on-off valve 27.
【００２２】[0022]
【発明の効果】以上述べたように本発明によれば、膜分
離槽内の被処理水を設定水位に維持して、膜分離ユニッ
トに設定水位からの水深に相応する水頭圧を作用させる
ことにより、外部から別途に動力を加えることなく被処
理水の固液分離を行うことができ、膜分離操作にかかる
ランニングコストの低減を図ることができる。また、集
水口の昇降により水頭圧を調整するか、流量調整弁の操
作により膜分離ユニット内に与える背圧を調整すること
によって、膜分離ユニットにおける透過流束を制御する
ことができる。As described above, according to the present invention, the water to be treated in the membrane separation tank is maintained at the set water level, and the head pressure corresponding to the water depth from the set water level is applied to the membrane separation unit. Accordingly, the solid-liquid separation of the water to be treated can be performed without additional power from the outside, and the running cost for the membrane separation operation can be reduced. Further, the permeation flux in the membrane separation unit can be controlled by adjusting the head pressure by raising and lowering the water collecting port, or by adjusting the back pressure applied to the inside of the membrane separation unit by operating the flow control valve.
【図１】本発明の一実施例における浸漬型濾過装置の全
体構成図である。FIG. 1 is an overall configuration diagram of an immersion filtration device according to an embodiment of the present invention.
【図２】従来の浸漬型濾過装置の全体構成図である。FIG. 2 is an overall configuration diagram of a conventional immersion filtration device.
２１ 膜分離槽 ２３ 膜分離ユニット ２４ 取出管 ２４ａ 流量調整弁 ３２ 流量調整槽 ３３ オーバーフロー管 ３３ａ 集水口 ３６ 循環ポンプ ３７ 循環管 DESCRIPTION OF SYMBOLS 21 Membrane separation tank 23 Membrane separation unit 24 Extraction pipe 24a Flow control valve 32 Flow control tank 33 Overflow pipe 33a Water collecting port 36 Circulation pump 37 Circulation pipe
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−341394（ＪＰ，Ａ) 特開 平５−168864（ＪＰ，Ａ) 実開 昭58−171300（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 61/18 B01D 63/08 C02F 1/44────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-341394 (JP, A) JP-A-5-168864 (JP, A) Japanese Utility Model 1983-171300 (JP, U) (58) Field (Int.Cl.7 , DB name) B01D 61/18 B01D 63/08 C02F 1/44
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5009656AJP3010951B2 (en) | 1993-01-25 | 1993-01-25 | Immersion filtration device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5009656AJP3010951B2 (en) | 1993-01-25 | 1993-01-25 | Immersion filtration device |
| Publication Number | Publication Date |
|---|---|
| JPH06218237A JPH06218237A (en) | 1994-08-09 |
| JP3010951B2true JP3010951B2 (en) | 2000-02-21 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5009656AExpired - Fee RelatedJP3010951B2 (en) | 1993-01-25 | 1993-01-25 | Immersion filtration device |
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| JP (1) | JP3010951B2 (en) |
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| JPH06218237A (en) | 1994-08-09 |
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| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) | Free format text:PAYMENT UNTIL: 20081210 Year of fee payment:9 | |
| FPAY | Renewal fee payment (event date is renewal date of database) | Free format text:PAYMENT UNTIL: 20081210 Year of fee payment:9 | |
| FPAY | Renewal fee payment (event date is renewal date of database) | Free format text:PAYMENT UNTIL: 20091210 Year of fee payment:10 | |
| LAPS | Cancellation because of no payment of annual fees |