JP2001104760A - Immersion type membrane filtration apparatus and method for washing filtration membrane - Google Patents
Immersion type membrane filtration apparatus and method for washing filtration membraneInfo
- Publication number
- JP2001104760A JP2001104760A JP28375799A JP28375799A JP2001104760A JP 2001104760 A JP2001104760 A JP 2001104760A JP 28375799 A JP28375799 A JP 28375799A JP 28375799 A JP28375799 A JP 28375799A JP 2001104760 A JP2001104760 A JP 2001104760A
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- water
- treated
- air
- filtration
- bubbles
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、浸漬槽内の被処理
液中に浸漬設置して濾過処理する膜濾過装置の構造、及
び濾過膜の洗浄方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a membrane filtration apparatus for immersing and filtering in a liquid to be treated in an immersion tank and a method for cleaning a filtration membrane.
【０００２】[0002]
【従来の技術】従来の膜濾過装置１００には、膜モジュ
ールを使用した、例えば特開平７−１９４９４７号公報
に記載されたものがある。この装置の概要を図７を用い
て説明する。2. Description of the Related Art A conventional membrane filtration apparatus 100 using a membrane module is disclosed in, for example, JP-A-7-194947. The outline of this device will be described with reference to FIG.
【０００３】原水１０５を浄化処理する曝気槽１０１の
内部に、浸漬型膜濾過装置１０２と散気管１０３が設け
られている。この膜濾過装置１０２は、原水１０５の活
性汚泥処理などで生じた曝気槽混合液１０８の固液分離
を行うものであり、上下両面が開放された方形の箱枠１
０９の内部に複数個の膜モジュール１１０が一定間隔を
おいて垂直に並列に設けられ、膜モジュール１１０の頂
部は、水没して浸漬されている。散気管１０３は、空気
などの酸素を含有する曝気用気体を膜モジュール１１０
の間に吹き込むものであり、膜濾過装置１０２の真下に
配置され、給気管１１２を介してブロワー１１３に接続
されている。また、膜モジュール１１０は吸引管１１４
を介して膜透過液槽１１５に連通しており、吸引管１１
４の途中には膜透過液１１６を吸引するポンプ１１７が
介装されている。[0003] Inside an aeration tank 101 for purifying raw water 105, an immersion type membrane filtration device 102 and an air diffusion tube 103 are provided. This membrane filtration device 102 is for performing solid-liquid separation of an aeration tank mixed solution 108 generated by activated sludge treatment of raw water 105 and the like.
A plurality of membrane modules 110 are vertically arranged in parallel at regular intervals inside 09, and the top of the membrane module 110 is immersed in water. The air diffuser 103 is provided with an aeration gas containing oxygen, such as air, in the membrane module 110.
The air is blown in between, and is disposed immediately below the membrane filtration device 102, and is connected to a blower 113 via an air supply pipe 112. Further, the membrane module 110 is provided with a suction tube 114.
Is connected to the membrane permeated liquid tank 115 through the suction pipe 11.
In the middle of 4, a pump 117 for sucking the membrane permeated liquid 116 is interposed.
【０００４】通常、膜濾過装置は、活性汚泥槽に平膜や
中空糸膜を浸漬し、微生物で処理された槽内懸濁液をさ
らに濾過して、その透過水を得るためのものである。こ
の濾過膜に付着堆積する微細な有機物等の汚泥を防止す
るために、濾過膜の下方に設置された散気管１０３より
エアを吐出して気泡１１１を発生させる。つまり、この
気泡１１１が濾過膜の表面を撫でて通過するときに、濾
過膜に付着した微細な有機物等の汚泥を連れ去るように
している。この場合、濾過膜間隔に対し相対的に気泡１
１１の径が大きい方が膜の洗浄効果が大きく、また、大
きい気泡１１１同士が合体するときの方が処理水の振動
エネルギーが大きくなるので、膜壁洗浄効果も大きい。
しかし、上記従来の膜濾過装置１０２の散気管１０３の
構成では、発生する気泡１１１が膜の間隔に比べて小さ
いため、大量に吐出してもその洗浄効果は少なく、ま
た、気泡１１１の大きさ、気泡１１１の分布、分散の平
均化制御が困難であった。[0004] Usually, a membrane filtration device is for immersing a flat membrane or a hollow fiber membrane in an activated sludge tank and further filtering the suspension in the tank treated with microorganisms to obtain permeated water. . In order to prevent sludge such as fine organic substances adhering and accumulating on the filtration membrane, air is discharged from an air diffuser 103 provided below the filtration membrane to generate bubbles 111. That is, when the air bubbles 111 pass over the surface of the filtration membrane by stroking, sludge such as fine organic substances adhered to the filtration membrane is taken away. In this case, bubbles 1
The larger the diameter of 11 is, the larger the cleaning effect of the membrane is, and the larger the bubbles 111 are, the larger the vibration energy of the treated water is.
However, in the configuration of the diffuser tube 103 of the conventional membrane filtration device 102, since the generated bubbles 111 are small compared to the interval between the membranes, the cleaning effect is small even if a large amount is discharged, and the size of the bubbles 111 is small. In addition, it was difficult to control the distribution and dispersion of the bubbles 111.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記課題を
解決し、濾過膜を洗浄するための気泡を大きくするとも
に、該気泡の分布を均等にする浸漬型膜濾過装置、及び
該浸漬型膜濾過装置を用いた濾過膜洗浄方法を提供する
ことを目的とする。DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, and provides an immersion type membrane filtration apparatus for enlarging bubbles for cleaning a filtration membrane and for equalizing the distribution of the bubbles. An object of the present invention is to provide a filtration membrane cleaning method using a membrane filtration device.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するた
め、本発明の一態様は、矩形断面を有する処理タンク内
の被処理水中に複数の濾過膜カートリッジを縦方向に一
定の横間隔で浸漬設置し、被処理水を濾過し集めてタン
クの外へ取出すように構成され、濾過膜カートリッジの
下部より多量の気泡を前記濾過膜カートリッジ間に送
り、被処理液の上昇流に載せ、気泡による濾過膜表面の
洗浄を行わせる膜濾過装置において、逆角錐状の処理タ
ンク下部の小径縦筒部に開口し、送出ポンプを介して処
理水を処理タンクに送り込む処理水循環配管と、前記処
理タンクの小径縦筒部に縦方向に設置し上方に開口する
エアノズルと、このエアノズルに結合した加圧空気配管
と、処理水循環配管に設けられた流量調整弁と、加圧空
気配管に設けられた空気流量調整弁とにより構成された
浸漬型膜濾過装置である。In order to achieve the above object, one aspect of the present invention is to immerse a plurality of filtration membrane cartridges in water to be treated in a treatment tank having a rectangular cross section at a constant horizontal interval in the longitudinal direction. It is configured to install, filter and collect the water to be treated and take it out of the tank.A large amount of air bubbles are sent from the lower part of the filtration membrane cartridge between the filtration membrane cartridges, placed on the upward flow of the liquid to be treated, and In a membrane filtration device for washing the surface of the filtration membrane, a processing water circulation pipe that opens into a small-diameter vertical cylindrical portion below the processing tank in the shape of an inverted pyramid and sends processing water to the processing tank via a delivery pump; An air nozzle installed vertically in the small-diameter vertical cylinder portion and opening upward, a pressurized air pipe connected to the air nozzle, a flow control valve provided in the treated water circulation pipe, and an air pipe provided in the pressurized air pipe It is a submerged membrane filtration apparatus constructed in accordance with a flow control valve.
【０００７】上記浸漬型膜濾過装置によれば、上方へ向
かう被処理水の中へエアノズルによって直接空気が供給
されるため気泡が大きくなり、微細な気泡に比べ濾過膜
の表面に接触し易くなる。また、気泡同士が合体すると
きの微細振動を生じ、濾過膜洗浄効果が大きくなる。さ
らに、整流ガイドの角度可変フラップにより各濾過膜パ
ネルに気泡を均等に分布することができ、従って被処理
水中の気泡分布が一様となり処理水の一様な流速が得ら
れ、この点でも濾過膜の洗浄効果が向上する。さらに、
上方へ向かう被処理水と気泡の混合比、該被処理水の流
量を制御して、濾過膜の間を通過する処理水速度と気泡
の数量の調整を容易にできる。[0007] According to the above immersion type membrane filtration device, air is directly supplied into the water to be treated upward by the air nozzle, so that the bubbles become large, and the bubbles easily contact the surface of the filtration membrane as compared with fine bubbles. . In addition, fine vibration occurs when the bubbles are united, and the effect of cleaning the filtration membrane is increased. In addition, the variable angle flap of the rectifying guide allows the air bubbles to be evenly distributed to each filtration membrane panel, so that the air bubble distribution in the water to be treated becomes uniform and a uniform flow rate of the treated water is obtained. The cleaning effect of the film is improved. further,
By controlling the mixing ratio of the water to be treated and the bubbles going upward and the flow rate of the water to be treated, it is possible to easily adjust the speed of the treated water passing between the filtration membranes and the number of the bubbles.
【０００８】また、本発明の別の態様は、上記浸漬型膜
濾過装置に加えて、更に、上記処理タンク下部の逆角錐
状部に複数並設され、水流に向かう側の端部に角度可変
フラップを備えた第１段目の整流ガイドと、該第１段目
の整流ガイドと濾過膜カートリッジとの間に第１段目の
整流ガイドとクロスする方向に複数並設され、第１段目
の整流ガイドと同様な可変フラップを備えた第２段目の
整流ガイドとを設置し、上方へ向かう気泡混合水の流れ
を分散整流し、各濾過膜カートリッジに対して気泡の分
布と被処理水の流速を平均化するように調整可能とした
浸漬型膜濾過装置である。さらに、上記の濾過膜装置に
おいて、処理タンクの小径縦筒部と逆角錐状部の境に水
平に粗いメッシュのネットを設置することにより、小径
縦筒部からの気泡の吹き出し面積を広げることができ、
より好適な課題解決の手段の浸漬型膜濾過装置となる。
上記浸漬型膜濾過装置によれば、被処理水中の気泡の吹
き出し面積を広げることができるので、後段の気泡混入
水の整流作用を助ける手段となる。In another aspect of the present invention, in addition to the immersion type membrane filtration device, a plurality of juxtaposed pyramid-shaped portions at the lower portion of the treatment tank have an angle variable at an end on the side facing the water flow. A first rectifying guide provided with a flap; and a plurality of rectifying guides arranged between the first rectifying guide and the filtration membrane cartridge in a direction crossing the first rectifying guide. A second-stage rectifying guide having a variable flap similar to the rectifying guide of the first embodiment is installed to disperse and rectify the upward flow of the bubble-mixed water. This is a submerged membrane filtration device that can be adjusted so as to average the flow velocity of the membrane. Furthermore, in the above-mentioned filtration membrane device, by installing a coarse mesh net horizontally at the boundary between the small-diameter vertical cylinder portion and the inverted pyramid-shaped portion of the treatment tank, it is possible to increase the blowing area of bubbles from the small-diameter vertical cylinder portion. Can,
The immersion type membrane filtration device is a more preferable means for solving the problem.
According to the above-mentioned immersion type membrane filtration device, since the blowing area of the bubbles in the water to be treated can be increased, the immersion type membrane filtration device is a means for assisting the rectification of the bubble-containing water at the subsequent stage.
【０００９】さらに、本発明の更に別の態様では、逆角
錐状の処理タンク下部の小径縦筒部に開口し、送出ポン
プを介して処理水を処理タンクに送り込む処理水循環配
管と、処理水循環配管に設けられた流量調整弁と、上記
処理タンク下部の逆角錐状部に複数並設され、水流に向
かう側の端部に角度可変フラップを備えた第１段目の整
流ガイドと、該第１段目の整流ガイドの上方に第１段目
の整流ガイドとクロスする方向に複数並設され、第１段
目の整流ガイドと同様な可変フラップを備えた第２段目
の整流ガイドと、第２段目の整流ガイドと濾過膜カート
リッジの間に該カートリッジと平行に設置され、上方に
開口する開口径が大きい多数のノズルを備えた複数の水
平配置の空気ノズル管と、該空気ノズル管とマニホール
ド管を介して連通する加圧空気配管と、該加圧空気配管
に設けられた空気流量調整弁と、空気ノズル管と濾過膜
カートリッジの底部との間に同カートリッジと平行に縦
方向に設置された整流板とにより構成され、処理タンク
内で上方へ向かう処理水の流れを均等に整流した後、各
濾過膜カートリッジの隙間にノズルよりの適量の気泡が
送られるようにした浸漬型膜濾過装置である。上記浸漬
型膜濾過装置によれば、供給空気量を大きく、また、整
流ガイドの角度可変フラップにより処理タンク内の上昇
流の速度を均一化することができ、各濾過膜パネルに気
泡を均等に分布することができる。従って、被処理水中
の気泡分布が一様となり被処理水の一様な流速が得ら
れ、濾過膜の洗浄効果が向上する。また、上方へ向かう
処理水と気泡の混合比、被処理水の流量を制御して、濾
過膜の間を通過する被処理水の速度と気泡の数量の調整
を容易とする効果がある。Further, in another aspect of the present invention, a treated water circulation pipe which opens into a small-diameter vertical cylindrical portion below the inverted pyramid-shaped treatment tank and feeds treated water to the treatment tank via a delivery pump, and a treated water circulation pipe A first-stage rectification guide provided with a plurality of angle-adjustable flaps at the end on the side facing the water flow, a plurality of which are arranged side by side in the inverted pyramid-shaped portion below the treatment tank; A second rectification guide having a plurality of variable flaps similar to the first rectification guide, the plurality of rectification guides being arranged in parallel in a direction crossing the first rectification guide above the first rectification guide; A plurality of horizontally arranged air nozzle pipes provided between the second-stage rectifying guide and the filtration membrane cartridge in parallel with the cartridge and provided with a large number of nozzles having a large opening diameter opening upward, and the air nozzle pipe; Communication via manifold pipe Pressurized air piping, an air flow control valve provided in the pressurized air piping, and a flow straightening plate installed vertically between the air nozzle pipe and the bottom of the filtration membrane cartridge in parallel with the cartridge. This is an immersion type membrane filtration device that is configured to uniformly rectify the upward flow of treated water in the treatment tank, and then to send an appropriate amount of bubbles from a nozzle to the gap between the respective filtration membrane cartridges. According to the above immersion type membrane filtration device, the supply air amount is large, and the speed of the rising flow in the processing tank can be made uniform by the angle variable flap of the rectification guide, and the air bubbles are evenly distributed to each filtration membrane panel. Can be distributed. Therefore, the distribution of bubbles in the water to be treated becomes uniform, and a uniform flow rate of the water to be treated is obtained, and the cleaning effect of the filtration membrane is improved. In addition, there is an effect that the mixing ratio of the treated water and the bubbles going upward and the flow rate of the treated water are controlled to easily adjust the speed of the treated water passing between the filtration membranes and the quantity of the bubbles.
【００１０】なお、本発明の一態様に係る濾過膜洗浄方
法は、上述した浸漬型膜濾過装置における、上記処理水
循環配管に設けられた流量調整弁と、空気配管に設けら
れた空気流量調整弁とを用い、被処理水と気泡の混合
比、及び被処理水の流量を制御して、濾過膜の間を通過
する被処理水の速度と気泡の大きさを調整可能としてい
る。The method for cleaning a filtration membrane according to one aspect of the present invention is characterized in that the flow control valve provided in the treated water circulation pipe and the air flow control valve provided in the air pipe in the immersion type membrane filtration apparatus described above. By controlling the mixing ratio of the water to be treated and the bubbles and the flow rate of the water to be treated, the speed of the water to be treated passing between the filtration membranes and the size of the bubbles can be adjusted.
【００１１】[0011]
【発明の実施の形態】以下に、本発明に係る浸漬型膜濾
過装置の実施形態を図面に基づいて詳細に説明する。 ［第１の実施の形態］図１は第１の実施形態に係る浸漬
型膜濾過装置の全体を示す概略図である。この浸漬型膜
濾過装置は、大きく分けて、処理タンク１、該処理タン
ク１に配設された処理水循環配管と加圧空気配管、及び
貯水タンクを備えている。上記処理タンク１は矩形断面
を有し、その下部は、下方に向かうにつれて徐々に先細
りする形状の逆角錐状部１ｂに形成され、該逆角錐状部
１ｂの下部にはこれに続いて小径縦筒部１ａが設けられ
ている。また、処理タンク１内部の上方には、複数の濾
過膜カートリッジ６が縦方向（上下方向）に互いに一定
の間隔を隔てて配設されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a submerged membrane filtration device according to the present invention will be described below in detail with reference to the drawings. [First Embodiment] FIG. 1 is a schematic view showing an entire immersion type membrane filtration device according to a first embodiment. This immersion type membrane filtration device is roughly divided into a treatment tank 1, a treatment water circulation pipe and a pressurized air pipe disposed in the treatment tank 1, and a water storage tank. The processing tank 1 has a rectangular cross section, and the lower portion is formed in an inverted pyramid-shaped portion 1b having a shape gradually tapered downward, and the lower portion of the inverted pyramid-shaped portion 1b is followed by a small-diameter vertical portion. A tubular portion 1a is provided. Above the inside of the processing tank 1, a plurality of filtration membrane cartridges 6 are arranged at regular intervals in the vertical direction (up and down direction).
【００１２】該濾過膜カートリッジ６は、被処理水が活
性汚泥処理などを通ったときに生じた微細な固形物と水
の混合液に対して固液分離を行う機能をもつ。また、濾
過膜カートリッジ６は、矩形の中枠の両側に多孔プレー
トが嵌め込まれた中空のパネルを、外側にＭＦ膜（精密
濾過膜）、内側に不織布を重ねた濾過膜で覆い、周囲の
縁をシールしている。この濾過膜カートリッジ６の上方
の隅には、濾過液を取り出して透過水配管８に通す通水
孔が設けられており、複数の濾過膜カートリッジ６を間
隔を揃えて整列させるために、周囲を補強材やクランプ
等で互いに固定し、処理タンク１の中に取付けてある。The filtration membrane cartridge 6 has a function of performing solid-liquid separation on a mixed liquid of fine solids and water generated when the water to be treated passes through activated sludge treatment. Further, the filtration membrane cartridge 6 covers a hollow panel in which a porous plate is fitted on both sides of a rectangular middle frame with a MF membrane (microfiltration membrane) on the outside and a filtration membrane in which a nonwoven fabric is laminated on the inside, and a peripheral edge thereof. Is sealed. In the upper corner of the filtration membrane cartridge 6, a water passage hole for taking out the filtrate and passing it through the permeated water pipe 8 is provided. They are fixed to each other with a reinforcing material, a clamp or the like, and are mounted in the processing tank 1.
【００１３】そして、上記濾過膜カートリッジ６の下部
には、上下段にそれぞれ整流ガイド群５，７を配設して
いる。該整流ガイド群５，７は、先端に可変フラップ５
ｆ，７ｈを設け、上下段の整流ガイド群５，７が互いに
直交する向きに配設して、気泡５０を混合した被処理水
の気泡５０を分散し、濾過膜カートリッジ６を通る気泡
５０の数量を均一にするものである。At the lower part of the filtration membrane cartridge 6, rectifying guide groups 5 and 7 are disposed at upper and lower stages, respectively. The rectifying guide groups 5 and 7 have a variable flap 5 at the tip.
f, 7h are provided, and upper and lower rectification guide groups 5, 7 are disposed in a direction orthogonal to each other to disperse the bubbles 50 of the water to be treated mixed with the bubbles 50. This is to make the quantity uniform.
【００１４】次いで、この整流ガイド群５，７の構成を
図２〜図４に基づいて説明する。図２は、第１の実施形
態に係る浸漬型濾過膜装置における処理タンク１の下部
構造を示す拡大図であり、この部位では、処理タンク１
に送給される被処理水と空気の混合、整流、及び気泡の
分散が行われる。図３は図２のＡ−Ａ線による断面図、
図４は気泡流れ拡大用のネット３１を配設した処理タン
ク下部の構造を示す部分断面図である。処理タンク１の
整流装置は、処理タンク１の下部の逆角錐状部１ｂに複
数並設し、第１段目の整流ガイドセット５と、第１段目
の整流ガイドセット５の上部に、これと直交するように
設けられた第２段目の整流ガイドセット７とにより構成
されている。Next, the structure of the rectifying guide groups 5 and 7 will be described with reference to FIGS. FIG. 2 is an enlarged view showing the lower structure of the processing tank 1 in the immersion type filtration membrane device according to the first embodiment.
Mixing and rectification of the water to be treated and the air fed to the hopper, and dispersion of the bubbles are performed. FIG. 3 is a sectional view taken along line AA of FIG.
FIG. 4 is a partial sectional view showing the structure of the lower portion of the processing tank provided with the net 31 for expanding the bubble flow. A plurality of rectifying devices of the processing tank 1 are arranged in parallel on the inverted pyramid-shaped portion 1b at the lower part of the processing tank 1, and the first rectifying guide set 5 and the upper part of the first rectifying guide set 5 And a second-stage rectifying guide set 7 provided so as to be orthogonal.
【００１５】上記第１段目の整流ガイドセット５は、図
２に示すように、整流ガイド５ａ、５ｂ、５ｃ、５ｄ、
５ｅを備えている。このうち、上記整流ガイド５ａは、
垂直（上下方向）に添って中央に配設された、後述する
角度可変フラップ５ｆを備えていない平板構造のガイド
である。整流ガイド５ｂ、５ｃ、５ｄ、５ｅは下降する
につれて徐々に中央側に向かうように傾斜し、流水に向
かう側（被処理水が流れてくる上流側）の端部に角度可
変フラップ５ｆを備えたものである。この角度可変フラ
ップ５ｆは処理タンク１の外側に設けてある把手２５に
より角度を変更することが可能であり、該フラップ５ｆ
の角度を変更することにより、被処理水が入る整流ガイ
ド５の入り口の面積の大きさを調整することができる。
なお、図示していないが、把手２５には角度可変フラッ
プ５ｆの回転軸の回転をロックするロック装置が設けて
あり、処理タンク１の側面には、整流ガイド５による気
泡の分散状態を監視する透明な板材料を嵌めた覗き窓１
９が配設されている。As shown in FIG. 2, the first-stage rectifying guide set 5 includes rectifying guides 5a, 5b, 5c, 5d,
5e. Among them, the rectifying guide 5a is
This is a guide having a flat plate structure that is provided at the center along the vertical direction (up and down direction) and does not include an angle variable flap 5f described later. The flow straightening guides 5b, 5c, 5d, and 5e are gradually inclined toward the center side as they descend, and have variable angle flaps 5f at the ends toward the flowing water (the upstream side where the water to be treated flows). Things. The angle of the variable flap 5f can be changed by a handle 25 provided outside the processing tank 1, and the flap 5f can be changed.
By changing the angle, the size of the area of the entrance of the rectifying guide 5 into which the water to be treated enters can be adjusted.
Although not shown, the handle 25 is provided with a lock device for locking the rotation of the rotation shaft of the variable angle flap 5f, and the side surface of the processing tank 1 monitors the distribution state of bubbles by the rectification guide 5. Viewing window 1 fitted with transparent board material
9 are provided.
【００１６】また、上記第２段目の整流ガイドセット７
も、図３に示すように、整流ガイド７ａ、７ｂ、７ｃ、
７ｄ、７ｅ、７ｆ、７ｇを備えている。このうち、上記
整流ガイド７ａは、垂直（上下方向）に添って中央に配
設された、後述する角度可変フラップ７ｈを備えていな
い平板構造のガイドである。整流ガイド７ｂ、７ｃ、７
ｄ、７ｅ、７ｆ、７ｇは下降するにつれて徐々に中央側
に向かうように傾斜し、流水に向かう側（被処理水が流
れてくる上流側）の端部に角度可変フラップ７ｈを備え
たものである。上記角度可変フラップ７ｈは処理タンク
１の外側に設けてある把手２７により角度変更が可能
で、該可変フラップ７の角度を変更することにより、整
流ガイド７の入り口の面積を加減することができる。な
お、図示していないが、把手２７には可変フラップ７ｈ
の回転軸の回転をロックするロック装置が設けてあり、
処理タンク１の側面には、整流ガイド７による気泡の分
散状態を監視する透明な板材料を嵌めた覗き窓２０が設
けられている。The second-stage rectifying guide set 7
Also, as shown in FIG. 3, rectifying guides 7a, 7b, 7c,
7d, 7e, 7f and 7g are provided. Among them, the rectifying guide 7a is a plate-shaped guide that is disposed at the center along the vertical direction (vertical direction) and does not include an angle variable flap 7h described later. Rectifying guides 7b, 7c, 7
d, 7e, 7f, and 7g are gradually inclined toward the center side as they descend, and have variable angle flaps 7h at the ends toward the flowing water (the upstream side where the water to be treated flows). is there. The angle of the variable flap 7h can be changed by a handle 27 provided on the outside of the processing tank 1. By changing the angle of the variable flap 7, the area of the entrance of the rectifying guide 7 can be adjusted. Although not shown, the handle 27 has a variable flap 7h.
There is a lock device that locks the rotation of the rotating shaft of
On the side surface of the processing tank 1, there is provided a viewing window 20 fitted with a transparent plate material for monitoring the state of dispersion of bubbles by the rectifying guide 7.
【００１７】なお、図４に示すように、処理タンク１の
下端部に形成された小径縦筒部１ａと逆角錐状部１ｂの
境に、水平方向に添って粗いメッシュのネット３１を設
置すれば、小径縦筒部１ａからの気泡混合水の気泡分布
を広げることができる。さらに、加圧空気配管３は、エ
アノズル４に接続されている。該エアノズル４は、処理
タンク１の小径縦筒部１ａの底部に配設され、空気を縦
方向（上方）に吹き出して被処理水中に気泡を発生する
ものであり、加圧空気配管３には、該加圧空気配管３を
開閉して空気等の流量を加減する空気流量調整弁１１
と、エアノズル４から吹き出す空気量を計測する空気流
量計１３とが設けられている。As shown in FIG. 4, a coarse mesh net 31 is installed along the horizontal direction at the boundary between the small-diameter vertical cylindrical portion 1a and the inverted pyramid-shaped portion 1b formed at the lower end of the processing tank 1. For example, the bubble distribution of the bubble-mixed water from the small-diameter vertical cylindrical portion 1a can be widened. Further, the pressurized air pipe 3 is connected to the air nozzle 4. The air nozzle 4 is disposed at the bottom of the small-diameter vertical cylindrical portion 1a of the processing tank 1 and blows air in the vertical direction (upward) to generate air bubbles in the water to be processed. An air flow control valve 11 for opening and closing the pressurized air pipe 3 to adjust the flow rate of air and the like.
And an air flow meter 13 for measuring the amount of air blown out from the air nozzle 4.
【００１８】処理水循環配管２は、処理タンク１の下部
に設けられた小径縦筒部１ａに接続され、その途中に
は、該処理水循環配管２を開閉して被処理水の流量を加
減する流量調整弁１２と、該被処理水の流量を計測する
水流量計１４と、処理水循環配管２を介して被処理水を
処理タンク１に送り込む送水ポンプ１５とが配設されて
いる。次いで、貯水タンク９について説明する。処理タ
ンク１の内部には被処理液が満たされており、上記濾過
膜カートリッジ６は該被処理液中に浸漬され、透過した
被処理液は集められて透過水配管８を介して処理タンク
１の外へ取出し、貯水タンク９に溜められる。貯水タン
ク９からオーバーフローした透過水は回収配管１７を通
して回収され、貯水タンク９内の処理済水は送出配管１
８により次工程へ送られるようになっている。なお、８
ａは透過水用ベントを示す。さらに、１６は処理タンク
１からのオーバーフロー水を処理水配管２へ戻すオーバ
ーフローリターン配管である。また、１０は処理タンク
１のヘッドスペースの圧力を大気に通じるエアベントで
ある。The treated water circulation pipe 2 is connected to a small-diameter vertical cylindrical portion 1a provided at the lower part of the treatment tank 1, and in the middle thereof, the flow rate for opening and closing the treated water circulation pipe 2 to adjust the flow rate of the treated water. An adjusting valve 12, a water flow meter 14 for measuring the flow rate of the water to be treated, and a water pump 15 for feeding the water to be treated into the treatment tank 1 via the treated water circulation pipe 2 are provided. Next, the water storage tank 9 will be described. The inside of the processing tank 1 is filled with the liquid to be treated, the filtration membrane cartridge 6 is immersed in the liquid to be treated, and the liquid to be treated permeated is collected and passed through the permeated water pipe 8 to the treatment tank 1. And stored in the water storage tank 9. The permeated water overflowing from the water storage tank 9 is recovered through the recovery pipe 17, and the treated water in the water storage tank 9 is recovered from the delivery pipe 1.
8 is sent to the next process. In addition, 8
a shows a vent for permeated water. Further, reference numeral 16 denotes an overflow return pipe for returning overflow water from the treatment tank 1 to the treated water pipe 2. Reference numeral 10 denotes an air vent for communicating the pressure of the head space of the processing tank 1 to the atmosphere.
【００１９】上記構成を有する第１の実施形態に係る浸
漬型膜濾過装置による作用を以下に説明する。送水ポン
プ１５で送られる処理水は、濾過膜カートリッジ６の濾
過能力に見合う流量に調整され、水流量計１４で計測さ
れた流量を確かめながら流量調整弁１２において流量を
調整され、処理水配管２から処理タンク１の下部の小径
縦筒部１ａに入り、処理タンク１内を上昇する。一方、
空気供給管３により供給された加圧空気は、空気流量計
１３で計測された空気流量を確かめながら、空気流量調
整弁１１において、被処理水に対する空気の適正混合比
になるように流量を調整される。次いで、この空気はエ
アノズル４を経て小径縦筒部１ａから吹き込まれ、大き
な気泡となって被処理水と共に上昇し（図４に示した処
理タンク１下部にネット３１があれば、気泡混合水の気
泡分布を広げ）、第１段目の整流ガイドセット５で図２
における左右方向に気泡の分布を広げる。このとき、覗
き窓１９から整流ガイドセット５を通過した気泡の流れ
状態を目視しながら、フラップ５ｆの角度を加減するこ
とにより気泡の分布割合を調整することができる。The operation of the immersion type membrane filtration device according to the first embodiment having the above configuration will be described below. The treated water sent by the water supply pump 15 is adjusted to a flow rate corresponding to the filtration capacity of the filtration membrane cartridge 6, and the flow rate is adjusted by the flow rate adjusting valve 12 while checking the flow rate measured by the water flow meter 14. From the lower portion of the processing tank 1 into the small-diameter vertical cylindrical portion 1a, and rises inside the processing tank 1. on the other hand,
The flow rate of the pressurized air supplied from the air supply pipe 3 is adjusted at the air flow rate adjusting valve 11 so as to have an appropriate mixing ratio of air to the water to be treated, while checking the air flow rate measured by the air flow meter 13. Is done. Next, this air is blown from the small-diameter vertical tube portion 1a through the air nozzle 4, and rises as large bubbles together with the water to be treated (if there is a net 31 below the treatment tank 1 shown in FIG. Bubble distribution is expanded), and the first-stage rectifying guide set 5 is used as shown in FIG.
The distribution of bubbles in the left-right direction at. At this time, the distribution ratio of the bubbles can be adjusted by adjusting the angle of the flap 5f while visually observing the flow state of the bubbles passing through the rectifying guide set 5 from the viewing window 19.
【００２０】このときの気泡の分散は、図２における左
右方向だけであるので、図２の直角方向の断面を示す図
３における左右方向の気泡分散を行うため、第２段目の
整流ガイドセット７を通過させる。整流ガイドセット７
は、第１段目の整流ガイドセット５と同様に、覗き窓２
０から整流ガイドセット７を通過した気泡の流れ状態を
目視しながら、フラップ７ｈの角度を加減することによ
り気泡の分布割合を調整することができる。被処理水中
に分散均一化された気泡は、被処理水と共に濾過膜カー
トリッジ６の間を均一な数量が通り抜け、濾過膜カート
リッジ６に付着した微細な固形物を取り除くことによっ
て、気泡による濾過膜カートリッジ６の表面の洗浄を行
うことができる。被処理水の適当な流れ速度が濾過膜の
濾過性能を向上させる。そして、濾過膜間隔に対し相対
的に気泡の径が大きい方が膜の洗浄効果が大きく、ま
た、大きい気泡同士が合体するときの方が処理水の振動
エネルギーが大きく、膜壁洗浄効果も大きくなる。な
お、被処理水が濾過膜を通過するための圧力は処理タン
ク１の水面と貯水タンク９の水面との水圧差（濾過膜カ
ートリッジ内はカートリッジの外部に対し負圧となる）
を利用しており、処理タンク１の液面高さはオーバフロ
ー戻しにより一定に保たれる。At this time, since the air bubbles are dispersed only in the left-right direction in FIG. 2, the second-stage rectifying guide set is used to perform the air bubble distribution in the right-left direction in FIG. Pass through 7. Rectification guide set 7
Is the viewing window 2 in the same manner as the first-stage rectifying guide set 5.
The distribution ratio of the bubbles can be adjusted by adjusting the angle of the flap 7h while visually observing the flow state of the bubbles passing through the rectifying guide set 7 from zero. Bubbles dispersed and uniformized in the water to be treated pass through the filtration membrane cartridge 6 in a uniform amount together with the water to be treated, and fine solid substances adhered to the filtration membrane cartridge 6 are removed. 6 can be cleaned. An appropriate flow rate of the water to be treated improves the filtration performance of the filtration membrane. The larger the diameter of the bubbles relative to the interval between the filtration membranes, the greater the effect of cleaning the membrane, and the larger the bubbles, the greater the vibration energy of the treated water and the greater the effect of cleaning the membrane wall. Become. The pressure at which the water to be treated passes through the filtration membrane is the difference in water pressure between the water surface of the treatment tank 1 and the water surface of the water storage tank 9 (the inside of the filtration membrane cartridge has a negative pressure relative to the outside of the cartridge).
And the liquid level in the processing tank 1 is kept constant by overflow return.
【００２１】[0021]
【第２の実施形態】第２の実施形態に係る浸漬型膜濾過
装置は、第１の実施形態と異なり、図１に示した処理タ
ンク１の小径縦筒部１ａの底部に設けたエアノズル４は
配設していない。そして、濾過膜カートリッジ６の下部
に、先端に角度可変フラップを備えた上下２段の整流ガ
イドのセット３５，３７を、互いに直交するように配設
し、これによって、被処理水が上昇する際の流速の分布
を均等になるように整流するものである。また、整流し
た被処理水の流れの中に濾過膜カートリッジ６と平行に
複数のノズル管３３を配設し、該ノズル管３３には多数
の開口径が大きいエアノズル３３ａを穿設することによ
って、該エアノズル３３ａから発生する気泡を均一に濾
過膜カートリッジ６同士の隙間に通すものである。以下
に、この第２の実施形態に係る浸漬型膜濾過装置の構成
を図に基づいて説明する。Second Embodiment An immersion type membrane filtration device according to a second embodiment is different from the first embodiment in that an air nozzle 4 provided at the bottom of the small-diameter vertical cylindrical portion 1a of the processing tank 1 shown in FIG. Is not provided. At the lower portion of the filtration membrane cartridge 6, two sets of rectification guides 35 and 37 having upper and lower rectification guides each having a variable angle flap at the tip are disposed so as to be orthogonal to each other. Is rectified so that the distribution of the flow velocity becomes uniform. Further, a plurality of nozzle pipes 33 are arranged in the flow of the rectified water to be treated in parallel with the filtration membrane cartridge 6, and a large number of air nozzles 33 a having a large opening diameter are formed in the nozzle pipes 33. The air bubbles generated from the air nozzle 33a are uniformly passed through the gap between the filtration membrane cartridges 6. Hereinafter, the configuration of the immersion type membrane filtration device according to the second embodiment will be described with reference to the drawings.
【００２２】図５は第２の実施形態に係る浸漬型濾過膜
装置による処理水整流機構、及び気泡発生機構を示す断
面図、図６は図５におけるＢ−Ｂ線断面図である。処理
タンク１の下部には整流ガイドセット３５，３７が配設
されている。このうち、第１段目の整流ガイドセット３
５は、処理タンク１の下部に形成された逆角錐状部１ｂ
に複数並設したものであり、第２段目の整流ガイドセッ
ト３７は、上記第１段目の整流ガイドセット３５の上側
に、この整流ガイドセット３５と略直角にクロスするよ
うに設けられている。上記第１段目の整流ガイドセット
３５は、図６に示すように、整流ガイド３５ａ、３５
ｂ、３５ｃ、３５ｄ、３５ｅを備えている。このうち、
中央の整流ガイド３５ａは、垂直（上下方向）に配設さ
れ、角度可変フラップ３５ｆを備えていない平板構造の
ガイドである。整流ガイド３５ｂ，３５ｃ，３５ｄ，３
５ｅは、下方に向かうにつれて中央側に傾斜しており、
流水に向かう側（被処理水が流れる上流側）の端部に角
度可変フラップ３５ｆを備えている。この角度可変フラ
ップ３５ｆによって、上記整流ガイド３５ｂ，３５ｃ，
３５ｄ，３５ｅの流水に向かう側を揺動させて、その傾
斜角度を自由に調整することができる。FIG. 5 is a cross-sectional view showing a treated water rectification mechanism and a bubble generation mechanism by the immersion type filtration membrane device according to the second embodiment, and FIG. 6 is a cross-sectional view taken along the line BB in FIG. Rectification guide sets 35 and 37 are provided below the processing tank 1. Among them, the first-stage rectifying guide set 3
5 is an inverted pyramid-shaped portion 1b formed at the lower part of the processing tank 1.
The second-stage rectification guide set 37 is provided above the first-stage rectification guide set 35 so as to cross the rectification guide set 35 at a substantially right angle. I have. As shown in FIG. 6, the first-stage rectification guide set 35 includes rectification guides 35a and 35a.
b, 35c, 35d, and 35e. this house,
The central rectifying guide 35a is a guide having a flat plate structure that is disposed vertically (up and down) and does not include the variable angle flap 35f. Rectifier guides 35b, 35c, 35d, 3
5e is inclined toward the center as it goes downward,
An angle variable flap 35f is provided at the end on the side toward the flowing water (upstream side where the water to be treated flows). The rectifying guides 35b, 35c,
By swinging the side of 35d, 35e toward the running water, the inclination angle can be freely adjusted.
【００２３】また、上記角度可変フラップ３５ｆは、処
理タンク１の外側に設けてある把手３６により角度変更
が可能で、角度可変フラップ３５ｆの角度を変更するこ
とにより、被処理水が入る整流ガイド３５の入り口の面
積の大きさを調整することができる。なお、図示してい
ないが、把手３６には可変フラップ３５ｆの回転軸の回
転をロックするロック装置が設けてある。そして、上記
第１段目の整流ガイドセット３５の上部には、第２段目
の整流ガイドセット３７が配設されている。このガイド
セット３７は、図５に示すように、中央側に上下方向に
配設された整流ガイド３７ａと、該整流ガイド３７ａの
両側に複数配設され、その傾斜角を変えることが可能な
角度可変フラップ３７ｂとによって構成されている。The angle variable flap 35f can be changed in angle by a handle 36 provided outside the treatment tank 1. By changing the angle of the angle variable flap 35f, the rectification guide 35 into which the water to be treated enters. The size of the entrance area can be adjusted. Although not shown, the handle 36 is provided with a lock device for locking the rotation of the rotation shaft of the variable flap 35f. A second-stage rectification guide set 37 is provided above the first-stage rectification guide set 35. As shown in FIG. 5, the guide set 37 is provided with a rectifying guide 37a vertically arranged on the center side and a plurality of rectifying guides 37a provided on both sides of the rectifying guide 37a, the angle of which can be changed. And a variable flap 37b.
【００２４】上記と同様に、該角度可変フラップ３７ｂ
は処理タンク１の外側に設けてある把手３８により角度
変更が可能で、フラップ３７ｂの角度を変更することに
より、整流ガイド３７の入り口の面積を加減することが
できる。なお、図示していないが、把手３８には可変フ
ラップ３７ｂの回転軸の回転をロックするロック装置が
設けてあり、上記第２段目の整流ガイドセット３７の上
部には、被処理水の上昇流に若干の流れ抵抗を与えるこ
とにより流速を均一化させるネット４１が配設されてい
る。そして、第２段目の整流ガイド３７と濾過膜カート
リッジ６の中間には、該濾過膜カートリッジ６と略平行
に複数の空気ノズル管３３が配設されている。この空気
ノズル管３３は、上方に開口する複数列で多数の開口径
の大きいエアノズル３３ａを備えており、また、図６に
示すように、マニホールド管３２を介して加圧空気配管
３に連通している。この加圧空気配管３には、図５に示
すように、空気流量調整弁１１と空気流量計１３とが設
けられている。As described above, the angle variable flap 37b
The angle of the rectifying guide 37 can be adjusted by changing the angle of the flap 37b by changing the angle of the handle 38 provided outside the processing tank 1. Although not shown, the handle 38 is provided with a lock device for locking the rotation of the rotary shaft of the variable flap 37b. A net 41 is provided to impart a slight flow resistance to the flow to make the flow velocity uniform. A plurality of air nozzle pipes 33 are disposed substantially in parallel with the filtration membrane cartridge 6 between the second-stage rectification guide 37 and the filtration membrane cartridge 6. The air nozzle pipe 33 is provided with a large number of large-diameter air nozzles 33a in a plurality of rows that open upward, and communicates with the pressurized air pipe 3 through a manifold pipe 32 as shown in FIG. ing. As shown in FIG. 5, the pressurized air pipe 3 is provided with an air flow control valve 11 and an air flow meter 13.
【００２５】さらに、上記空気ノズル管３３と濾過膜カ
ートリッジ６の底部との間には、各カートリッジ６に対
応してガイド板３８が配設されている。このガイド板３
８は、処理タンク１内で上方へ向かう被処理水の流れを
整流すると共に、各濾過膜カートリッジ６の隙間に割り
当てた、各空気ノズル管３３のノズル３３ａ列毎にセパ
レート（分割）し、各濾過膜カートリッジ６の隙間に均
等に適量の気泡５０が送られるようにしている。このガ
イド板３８の側方には、気泡５０の分散状態を監視する
透明な板材料を嵌めた覗き窓３９は処理タンク１に配設
されている。Further, a guide plate 38 is provided between the air nozzle tube 33 and the bottom of the filtration membrane cartridge 6 so as to correspond to each cartridge 6. This guide plate 3
8 rectifies the upward flow of the water to be treated in the treatment tank 1 and separates (divides) each nozzle 33a row of each air nozzle pipe 33 allocated to the gap of each filtration membrane cartridge 6; An appropriate amount of air bubbles 50 is sent evenly to the gap between the filtration membrane cartridges 6. A viewing window 39 fitted with a transparent plate material for monitoring the dispersion state of the bubbles 50 is disposed on the side of the guide plate 38 in the processing tank 1.
【００２６】上記構成を有する第２の実施形態に係る浸
漬型膜濾過装置の作用について説明する。まず、送水ポ
ンプ１５で送られてくる被処理水は、流量計１４で計測
された流量を確かめながら調整開閉弁１２において流量
を調整され、処理水配管２から処理タンク１の下部の小
径縦筒部１ａに入り、処理タンク１内を上昇する。この
のち、第１段目の整流ガイドセット３５で、図６におけ
る左右方向に被処理水の流れが広げられる。このとき、
角度可変フラップ３５ｆの角度を調整することにより被
処理水の流れの分布を調整することができる。次いで、
第２段目の整流ガイドセット３７を被処理水が通過する
ことにより、図５における左右方向に被処理水の流れが
更に広げられる。被処理水がネット４１を通過するとき
ネット４１の流れ抵抗により流速が均一化され、空気ノ
ズル管３３を通り過ぎるとき、エアノズル３３ａから空
気が吹き出し、大きい気泡５０が発生する。この被処理
水中に分散均一化された気泡５０は、ガイド板３８に沿
って上方に浮き上がり、濾過膜カートリッジ６の間を均
一な数量が通り抜け、該濾過膜カートリッジ６に付着し
た微細な固形物を取り除く作用をする。The operation of the immersion type membrane filtration device according to the second embodiment having the above configuration will be described. First, the water to be treated sent by the water supply pump 15 is adjusted in flow rate by the adjusting on-off valve 12 while confirming the flow rate measured by the flow meter 14, and the small-diameter vertical cylinder from the treated water pipe 2 to the lower part of the treatment tank 1. It enters the part 1a and rises inside the processing tank 1. Thereafter, the flow of the water to be treated is expanded in the left-right direction in FIG. At this time,
By adjusting the angle of the angle variable flap 35f, the distribution of the flow of the water to be treated can be adjusted. Then
When the water to be treated passes through the second-stage rectification guide set 37, the flow of the water to be treated is further widened in the left-right direction in FIG. When the water to be treated passes through the net 41, the flow velocity is made uniform by the flow resistance of the net 41, and when passing through the air nozzle pipe 33, air is blown out from the air nozzle 33 a to generate large bubbles 50. The air bubbles 50 dispersed and uniformized in the water to be treated are lifted upward along the guide plate 38, pass through a uniform amount between the filtration membrane cartridges 6, and remove fine solids attached to the filtration membrane cartridges 6. Acts to remove.
【００２７】一方、エアノズル３３ａから被処理水へ供
給される空気量は、流量計１３で計測された空気流量を
確かめながら、調整開閉弁１１において、被処理水に対
する空気の適正混合比になるように流量が調整される。
また、覗き窓３９から、空気ノズル管３３を通過しエア
ノズル３３ａから発生する気泡５０の流れ状態を目視し
ながら、角度可変フラップ３７ｂの角度を調整して被処
理水の速度を調整し、濾過膜カートリッジ６の隙間に入
って行く気泡の分布状態を確かめることができる。On the other hand, the amount of air supplied from the air nozzle 33a to the water to be treated is adjusted to the appropriate mixing ratio of air to the water to be treated at the regulating on-off valve 11 while confirming the air flow rate measured by the flow meter 13. The flow rate is adjusted.
Also, while observing the flow state of the air bubbles 50 generated from the air nozzle 33a through the air nozzle pipe 33 through the viewing window 39, the angle of the angle variable flap 37b is adjusted to adjust the speed of the water to be treated, and the filtration membrane is adjusted. The distribution state of the air bubbles entering the gap of the cartridge 6 can be confirmed.
【００２８】[0028]
【発明の効果】本発明に係る膜濾過装置によれば、処理
タンク下部から処理水配管を通して処理水を送り込むポ
ンプと、加圧空気配管に連通し処理タンク下部に上方に
開口するエアノズルと、処理水配管に設けられた流量調
整弁と、加圧空気配管に設けられた空気流量調整弁とに
より構成され、処理タンク下部と濾過膜カートリッジと
の間に角度可変フラップを備えた整流ガイドを２組をク
ロスして２段階に備えたので、上方へ向かう被処理水の
中へ直接空気が供給されるため気泡が大となり、微細気
泡に比べ濾過膜表面に接触し易くなる。また、気泡同士
が合体するときの微細振動を生じ、濾過膜洗浄効果が大
きく、整流ガイドの可変角度フラップにより各濾過膜パ
ネルに気泡を均等に分布することができる。従って、被
処理水中の気泡分布が一様となり被処理水の一様な流速
が得られ、この点でも濾過膜カートリッジの洗浄効果が
向上する。また、上方へ向かう処理水と気泡の混合比、
流量を制御して、濾過膜カートリッジの間を通過する処
理水速度と気泡の数量の調整を容易とする効果がある。According to the membrane filtration device of the present invention, a pump for feeding treatment water from the lower part of the treatment tank through the treatment water pipe, an air nozzle communicating with the pressurized air pipe and opening upward to the lower part of the treatment tank, Two sets of rectifying guides, each composed of a flow control valve provided in the water pipe and an air flow control valve provided in the pressurized air pipe, and having a variable angle flap between the lower part of the processing tank and the filtration membrane cartridge. Is provided in two stages by crossing, so that air is directly supplied into the water to be treated upward, so that bubbles become large, and the bubbles easily contact the filtration membrane surface as compared with fine bubbles. In addition, fine vibrations occur when the air bubbles are united with each other, so that the effect of cleaning the filtration membrane is large, and the air bubbles can be evenly distributed to each filtration membrane panel by the variable angle flap of the rectifying guide. Accordingly, the distribution of bubbles in the water to be treated becomes uniform, and a uniform flow rate of the water to be treated is obtained. In this respect, the cleaning effect of the filtration membrane cartridge is also improved. In addition, the mixing ratio of upwardly treated water and bubbles,
By controlling the flow rate, there is an effect that the speed of the treated water passing between the filtration membrane cartridges and the number of bubbles are easily adjusted.
【００２９】また、エアノズル出口の先の処理タンクの
底部に粗いメッシュのネットを設置したものは、被処理
水中の気泡の吹き出し面積を広げることができるので、
気泡混入水の整流作用を助ける手段となる。さらに、上
記膜濾過装置は、処理タンクの下部の底部にエアノズル
を設置せず、濾過膜カートリッジの下部に、先端に可変
フラップを備えた整流ガイドを上下２段階に、上下段の
整流ガイドが互いに直角方向となるように取付けて、被
処理水の上昇流速度分布を均等になるように整流し、整
流した被処理水の流れの中に複数のノズル管を設置し、
このノズル管に設けられた開口径が大きい多数のエアノ
ズルから発生する大きい気泡を均一に濾過膜カートリッ
ジ６の隙間に通す構成とすることによって、供給空気量
を大きく、整流ガイドの角度可変フラップにより処理タ
ンク内の上昇流の速度を均一化することができ、各濾過
膜パネルに気泡を均等に分布することができる。従っ
て、被処理水中の気泡分布が一様となり被処理水の一様
な流速が得られ、濾過膜カートリッジの洗浄効果が向上
する。また、上方へ向かう被処理水と気泡の混合比、流
量を制御して、濾過膜カートリッジの間を通過する被処
理水の速度と気泡の数量の調整を容易とする効果があ
る。In the case where a coarse mesh net is provided at the bottom of the processing tank at the end of the air nozzle outlet, the area for blowing bubbles in the water to be treated can be increased.
It is a means to help the rectification of the bubbled water. Further, in the membrane filtration device, an air nozzle is not provided at the bottom of the lower portion of the processing tank, and a rectification guide having a variable flap at a tip thereof is provided in two lower and upper stages at a lower portion of the filtration membrane cartridge. Attached so as to be in a right angle direction, rectify the ascending flow velocity distribution to be uniform, install a plurality of nozzle pipes in the rectified flow of treated water,
Large air bubbles generated from a large number of air nozzles having a large opening diameter provided in the nozzle pipe are uniformly passed through the gap of the filtration membrane cartridge 6, so that the amount of supplied air is large, and processing is performed by the angle variable flap of the rectifying guide. The speed of the ascending flow in the tank can be made uniform, and the air bubbles can be evenly distributed to each filtration membrane panel. Therefore, the distribution of bubbles in the water to be treated becomes uniform, and a uniform flow rate of the water to be treated is obtained, and the cleaning effect of the filtration membrane cartridge is improved. In addition, there is an effect that the mixing ratio and flow rate of upwardly-treated water and bubbles are controlled to facilitate adjustment of the velocity of treated water and the number of bubbles that pass between the filtration membrane cartridges.
【図１】第１の実施形態に係る浸漬型濾過膜装置全体の
概略図である。FIG. 1 is a schematic diagram of an entire immersion type filtration membrane device according to a first embodiment.
【図２】図１に示す処理タンク下部の拡大詳細図であ
る。FIG. 2 is an enlarged detailed view of a lower portion of the processing tank shown in FIG.
【図３】図２のＡ−Ａ線による断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 2;
【図４】図２に示す浸漬型濾過膜装置の下部にネットを
配設した断面図である。FIG. 4 is a cross-sectional view in which a net is provided below the immersion type filtration membrane device shown in FIG.
【図５】第２の実施形態に係る浸漬型濾過膜装置におけ
る処理タンク下部を示す拡大詳細図である。FIG. 5 is an enlarged detailed view showing a lower portion of a processing tank in a submerged filtration membrane device according to a second embodiment.
【図６】図５のＢ−Ｂ線による断面図である。FIG. 6 is a sectional view taken along line BB of FIG. 5;
【図７】従来の浸漬型膜濾過装置全体を示す断面図であ
る。FIG. 7 is a cross-sectional view showing the entire conventional immersion type membrane filtration device.
１ 処理タンク ２ 処理水配管 ３ 加圧空気配管 ４ エアノズル ５ 第１段目の整流ガイド群 ５ｆ，７ｈ，３５ｆ，３７ｂ 角度可変フラップ ６ 濾過膜カートリッジ ７ 第２段目の整流ガイド群 ８ 透過水配管 １１ 空気流量調整弁 １２ 水流量調整弁 １５ 送水ポンプ ３１ ネット ３３ ノズル管 ３３ａ エアノズル ３５ 第１段目の整流ガイドセット ３７ 第２段目の整流ガイドセット ３７ａ 整流ガイド ３８ ガイド板 ５０ 気泡 DESCRIPTION OF SYMBOLS 1 Treatment tank 2 Treatment water piping 3 Pressurized air piping 4 Air nozzle 5 First-stage rectification guide group 5f, 7h, 35f, 37b Variable angle flap 6 Filtration membrane cartridge 7 Second-stage rectification guide group 8 Permeated water piping DESCRIPTION OF SYMBOLS 11 Air flow control valve 12 Water flow control valve 15 Water pump 31 Net 33 Nozzle tube 33a Air nozzle 35 First-stage rectification guide set 37 Second-stage rectification guide set 37a Rectification guide 38 Guide plate 50 Bubbles
───────────────────────────────────────────────────── フロントページの続き (72)発明者 蒔田 伸二 愛知県名古屋市中村区岩塚町字高道１番地 三菱重工業株式会社名古屋機器製作所内 Ｆターム(参考） 4D006 GA07 HA28 HA93 JA25A JA29A JA31A JA33A KA43 KA45 KE01Q KE02Q MA06 PA02 PB08 PC62 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinji Makita 1F, Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya-shi, Aichi F-term in Nagoya Machinery Works, Mitsubishi Heavy Industries, Ltd. 4D006 GA07 HA28 HA93 JA25A JA29A JA31A JA33A KA43 KA45 KE01Q KE02Q MA06 PA02 PB08 PC62
Claims (5)
処理水の中に浸漬させた状態で複数の濾過膜を上下方向
に配設すると共に、この濾過膜の下部から上方に向けて
気泡を発生させ、該気泡を被処理水の上昇流に載せて濾
過膜同士の間隙に送ることによって、濾過膜表面を気泡
を用いて洗浄するようにした浸漬型膜濾過装置におい
て、 上記処理タンク内の下部に配設され、上方に向けて気泡
を発生させるエアノズルと、該エアノズルに連通し、そ
の流量を調整する流量調整弁を有する空気配管と、処理
タンクの下部に連通し、送出ポンプを介して処理水を処
理タンクに送り込むと共に、その流量を調整する流量調
整弁を有する処理水循環配管とを備えたことを特徴とす
る浸漬型膜濾過装置。1. A process tank containing water to be treated, a plurality of filter membranes arranged vertically in a state of being immersed in the water to be treated, and upward from a lower part of the filter membrane. In the immersion type membrane filtration device, the air bubbles are generated, and the air bubbles are placed on the ascending flow of the water to be treated and sent to the gap between the filtration membranes to clean the filtration membrane surface using the air bubbles. An air nozzle disposed at a lower part in the tank and generating air bubbles upward, an air pipe communicating with the air nozzle and having a flow rate adjusting valve for adjusting a flow rate thereof, and a delivery pump communicating with a lower part of the processing tank; And a treated water circulation pipe having a flow rate regulating valve for regulating the flow rate of the treated water through the treatment tank.
ノズルの上部に設けた第１段目の整流ガイド群と、該第
１段目の整流ガイド群と濾過膜の間に配設された第２段
目の整流ガイド群とを更に設けた浸漬型膜濾過装置であ
って、 上記第１段目の整流ガイド群を構成する整流ガイドに、
その下端部に揺動可能な角度可変フラップを設け、上記
第２段目の整流ガイド群を構成する整流ガイドは、上記
第１段目の整流ガイドと略直交するように配設され、且
つ、その下端部に揺動可能な角度可変フラップが設けら
れ、上方へ向かう気泡混合水の流れを分散させて整流
し、各々の濾過膜に対して気泡の分布と被処理水の流速
を平均化するように調整できるようにしたことを特徴と
する請求項１に記載の浸漬型膜濾過装置。2. A first-stage rectification guide group provided above the air nozzle between the air nozzle and the filtration membrane, and a first-stage rectification guide group and the filtration membrane are provided between the first-stage rectification guide group and the filtration membrane. A submerged membrane filtration device further provided with a second-stage rectification guide group, wherein the rectification guides constituting the first-stage rectification guide group include:
A swingable angle variable flap is provided at the lower end thereof, and the rectification guides constituting the second-stage rectification guide group are disposed so as to be substantially orthogonal to the first-stage rectification guide, and A swingable angle variable flap is provided at its lower end to disperse and rectify the upward flow of bubble-mixed water, and to average the distribution of bubbles and the flow rate of the water to be treated for each filtration membrane. 2. The immersion type membrane filtration device according to claim 1, wherein the immersion type membrane filtration device can be adjusted in such a manner.
群との間に、網状部材を略水平方向に設置することによ
って、上記エアノズルからの気泡の吹き出し面積を広げ
たことを特徴とする請求項１又は２に記載の浸漬型膜濾
過装置。3. An air bubble blowing area from said air nozzle is widened by installing a net-like member in a substantially horizontal direction between said air nozzle and a first-stage flow guide group. Item 3. The immersion type membrane filtration device according to Item 1 or 2.
置の、上記処理水循環配管に設けられた流量調整弁と、
空気配管に設けられた空気流量調整弁とを用い、被処理
水と気泡の混合比、及び被処理水の流量を制御して、濾
過膜の間を通過する被処理水の速度と気泡の大きさを調
整可能としたことを特徴とする濾過膜の洗浄方法。4. A flow control valve provided in the treated water circulation pipe of the immersion type membrane filtration device according to claim 1;
By controlling the mixing ratio of the water to be treated and the bubbles and the flow rate of the water to be treated by using an air flow rate regulating valve provided in the air pipe, the velocity of the water to be treated passing between the filtration membranes and the size of the bubbles are controlled. A method for cleaning a filtration membrane, wherein the filtration membrane is adjustable.
処理水の中に浸漬させた状態で複数の濾過膜を上下方向
に配設すると共に、この濾過膜の下部から上方に向けて
気泡を発生させ、該気泡を被処理水の上昇流に載せて濾
過膜同士の間隙に送ることによって、濾過膜表面を気泡
を用いて洗浄するようにした浸漬型膜濾過装置におい
て、 上記処理タンクの下部に連通し、送出ポンプを介して被
処理水を処理タンク内に送り込む処理水循環配管と、上
記処理タンクの下部に複数並設され、その下端部に傾斜
角が変化する角度可変フラップを設けた第１段目の整流
ガイド群と、該第１段目の整流ガイド群の上方にこれと
略直交する方向に複数並設され、その下端部に傾斜角が
変化する角度可変フラップを設けた第２段目の整流ガイ
ド群と、該第２段目の整流ガイド群と濾過膜の間に、該
濾過膜と平行に配設され、上側にエアノズルを複数設
け、略水平方向に配設された空気ノズル管と、該空気ノ
ズル管に連通し、空気流量調整弁が設けられた空気配管
と、上記空気ノズル管と濾過膜との間に該濾過膜と略平
行に上下方向に配設された整流板とを備え、上記第１段
目と第２段目の整流ガイド群によって、処理タンク内を
上方へ向かう被処理水の流れを均等に整流した後、濾過
膜同士の隙間にエアノズルから適量の気泡が送られるよ
うにしたことを特徴とする浸漬型膜濾過装置。5. A treatment water is accommodated in a treatment tank, and a plurality of filtration membranes are vertically arranged while being immersed in the treatment water. In the immersion type membrane filtration device, the air bubbles are generated, and the air bubbles are placed on the ascending flow of the water to be treated and sent to the gap between the filtration membranes to clean the filtration membrane surface using the air bubbles. A treated water circulation pipe that communicates with the lower part of the tank and feeds the water to be treated into the treatment tank via the delivery pump, and a plurality of angle variable flaps that are arranged in parallel at the lower part of the treatment tank and have a tilt angle that changes at the lower end thereof. A first-stage rectifying guide group provided, and a plurality of variable angle flaps, which are arranged above the first-stage rectifying guide group in a direction substantially perpendicular to the first rectifying guide group and whose inclination angle changes at a lower end thereof. Second rectifying guide group, Between the rectification guide group of the eye and the filtration membrane, disposed in parallel with the filtration membrane, provided with a plurality of air nozzles on the upper side, an air nozzle pipe arranged in a substantially horizontal direction, and communicated with the air nozzle pipe, An air pipe provided with an air flow control valve, and a straightening plate disposed between the air nozzle tube and the filtration membrane in a vertical direction substantially in parallel with the filtration membrane, the first stage and the first stage. After the flow of the water to be treated upward in the treatment tank is evenly regulated by the second-stage rectification guide group, an appropriate amount of air bubbles is sent from the air nozzle to the gap between the filtration membranes. Immersion type membrane filtration device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28375799A JP2001104760A (en) | 1999-10-05 | 1999-10-05 | Immersion type membrane filtration apparatus and method for washing filtration membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28375799A JP2001104760A (en) | 1999-10-05 | 1999-10-05 | Immersion type membrane filtration apparatus and method for washing filtration membrane |
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| Publication Number | Publication Date |
|---|---|
| JP2001104760A true JP2001104760A (en) | 2001-04-17 |
Family
ID=17669729
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28375799A Pending JP2001104760A (en) | 1999-10-05 | 1999-10-05 | Immersion type membrane filtration apparatus and method for washing filtration membrane |
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Cited By (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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