JP2003038912A - Suspended matter removing apparatus and operation method therefor - Google Patents
Suspended matter removing apparatus and operation method thereforInfo
- Publication number
- JP2003038912A JP2003038912A JP2001189445A JP2001189445A JP2003038912A JP 2003038912 A JP2003038912 A JP 2003038912A JP 2001189445 A JP2001189445 A JP 2001189445A JP 2001189445 A JP2001189445 A JP 2001189445A JP 2003038912 A JP2003038912 A JP 2003038912A
- Authority
- JP
- Japan
- Prior art keywords
- tower
- water
- filter medium
- pipe
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は濁質除去装置および
その運転方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspended matter removing device and a method of operating the same.
【０００２】原水中の浮遊固体（濁質）の除去装置とし
て、下向流形式で原水が供給され且つ上向流形式で洗浄
水が供給される濁質除去装置であって、塔内部の上下に
配置された支持体間に原水供給時には下部支持体に押圧
されて圧密状態を形成し且つ洗浄水供給時には圧密状態
を解除し得る様に濾材を収容して成る濁質除去装置が有
効である。斯かる装置によれば、原水処理運転時におけ
る濾材の圧密状態と洗浄運転時における圧密状態の解除
とにより、濾材による濁質の捕捉と排出とが効率的に行
われる。As a device for removing suspended solids (turbidity) in raw water, a turbidity removing device in which raw water is supplied in a downward flow type and washing water is supplied in an upward flow type, A turbidity removing device is effective between the supports arranged in the above manner, which is pressed by the lower support to form a consolidated state when the raw water is supplied and contains a filter medium so that the consolidated state can be released when the cleaning water is supplied. . According to such a device, the filter medium is efficiently trapped and discharged by the pressure-consolidated state of the filter medium during the raw water treatment operation and the release of the pressure-consolidated state during the cleaning operation.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、原水
処理運転時における濾材の圧密状態と洗浄運転時におけ
る濾材の圧密状態の解除とにより、濾材による濁質の捕
捉と排出とが効率的に行われる構造の濁質除去装置であ
って、洗浄運転を効率的に行い得る様に改良された濁質
除去装置を提供することにある。また、本発明の他の目
的は、上記の濁質除去装置の工業的に有利な運転方法を
提供することにある。DISCLOSURE OF THE INVENTION An object of the present invention is to efficiently capture and discharge turbidity by a filter medium by consolidating the filter medium during the raw water treatment operation and releasing the filter medium during the washing operation. Another object of the present invention is to provide a turbidity removing device having a structure to be performed according to the first aspect, which is improved so that the cleaning operation can be efficiently performed. Another object of the present invention is to provide an industrially advantageous operation method of the above-mentioned turbidity removing device.
【０００４】[0004]
【課題を解決するための手段】すなわち、本発明の第１
の要旨は、下向流形式で原水が供給され且つ上向流形式
で洗浄水が供給される濁質除去装置であって、塔（１）
の頂部にはバルブ付の原水供給配管と洗浄廃水排出配管
とが設けられ、塔（１）の底部にはバルブ付の処理水排
出配管と洗浄水供給配管と空気供給配管とが設けられ、
塔内部には上部支持体（２）と下部支持体（３）とが配
置され、上部支持体（２）と下部支持体（３）との間に
は芯紐および当該芯紐の周側に突設された濁質捕捉材か
ら成る複数の濾材（４）が当該濾材の端部の上部吊り紐
（７）と下部吊り紐（８）とによって懸垂状態で固定さ
れ、濾材（４）の芯紐ならびに上部吊り紐（７）及び下
部吊り紐（８）は流水方向に沿って屈曲変形可能に構成
され、上部支持体（２）と下部支持体（３）との間の距
離（ＬＡ）、濾材（４）の長さ（ＬＢ）、上部吊り紐
（７）の長さ（Ｌｂ１）、下部吊り紐（８）の長さ（Ｌ
ｂ２）の関係が以下に規定する式（１）〜（３）を満足
し、そして、上部支持体（２）から上部吊り紐（７）の
長さ（Ｌｂ１）に相当する範囲を除く上部支持体（２）
と下部支持体（３）との間の領域であって且つ当該領域
の上端および下端からそれぞれ当該領域の高さの１０％
に相当する範囲を除く領域の塔側部にはバルブ（６６）
付の中間抜水管（５４）が具備されていること特徴とす
る濁質除去装置に存する。That is, the first aspect of the present invention
The gist of is a turbidity removal device in which raw water is supplied in a downward flow type and washing water is supplied in an upward flow type, and a tower (1)
A raw water supply pipe with a valve and a washing wastewater discharge pipe are provided at the top of the tower, and a treated water discharge pipe with a valve, a wash water supply pipe and an air supply pipe are provided at the bottom of the tower (1),
An upper support (2) and a lower support (3) are arranged inside the tower, and a core cord is provided between the upper support (2) and the lower support (3) and on the circumferential side of the core cord. A plurality of filter media (4) made of suspended turbidity trapping material are fixed in a suspended state by an upper suspension string (7) and a lower suspension string (8) at the end of the filter medium, and the core of the filter medium (4) is fixed. The string and the upper hanging string (7) and the lower hanging string (8) are configured to be bendable and deformable in the flowing direction, and the distance (LA) between the upper support (2) and the lower support (3), Length of filter medium (4) (LB), length of upper hanging string (7) (Lb1), length of lower hanging string (8) (L
b2) satisfies the formulas (1) to (3) defined below, and excludes the upper support except the range corresponding to the length (Lb1) of the upper suspension string (7) from the upper support (2). Body (2)
10% of the height of the area between the upper and lower ends of the area, which is between the lower support and the lower support (3).
Valve (66) on the tower side of the area excluding the area corresponding to
The present invention resides in a turbidity removing device characterized in that it is provided with an attached intermediate drainage pipe (54).
【０００５】[0005]
【数２】 １．０１×ＬＡ＜（Ｌｂ１＋ＬＢ＋Ｌｂ２）＜２．００×ＬＡ （１） １．０１×ＬＢ＜ＬＡ＜１．５０×ＬＢ （２） １．０１（ＬＢ＋Ｌｂ２）＜ＬＡ＜１．０１（ＬＢ＋Ｌｂ１） （３）[Equation 2] 1.01 × LA <(Lb1 + LB + Lb2) <2.00 × LA (1) 1.01 x LB <LA <1.50 x LB (2) 1.01 (LB + Lb2) <LA <1.01 (LB + Lb1) (3)
【０００６】本発明の第２の要旨は、上記の濁質除去装
置の運転方法であって、原水処理運転停止後、先ず、次
の（Ａ）及び（Ｂ）の各操作を行ない、次いで、同
（Ａ）及び（Ｂ）の各操作を再度行なった後、原水処理
運転を再開することを特徴とする濁質除去装置の運転方
法に存する。A second aspect of the present invention is a method for operating the above-mentioned turbidity removing apparatus, wherein after the raw water treatment operation is stopped, first, the following operations (A) and (B) are performed, and then The method for operating a turbidity removing apparatus is characterized in that the raw water treatment operation is restarted after performing each of the operations (A) and (B) again.
【０００７】（Ａ）塔底部から洗浄水および空気を供給
して塔頂部から排出させる洗浄運転。
（Ｂ）下部吊り紐（８）及び濾材（４）が塔内の上方に
伸長した状態で洗浄水および空気の供給を停止した後、
中間抜水管（５４）から塔内の貯留水を抜き出す一部抜
水工程。(A) A washing operation in which washing water and air are supplied from the bottom of the tower and discharged from the top of the tower. (B) After stopping the supply of washing water and air in a state where the lower suspension string (8) and the filter medium (4) extend upward in the tower,
Partial drainage process of draining stored water in the tower from the intermediate drainage pipe (54).
【０００８】そして、本発明の第３の要旨は、上記の濁
質除去装置の運転方法であって、原水処理運転停止後、
先ず、次の（Ａ）及び（Ｂ）の各操作を行ない、次い
で、次の（Ｃ）〜（Ｅ）の各操作を行なった後、原水処
理運転を再開することを特徴とする濁質除去装置の運転
方法に存する。A third gist of the present invention is a method of operating the above-mentioned turbidity removing apparatus, which comprises:
First, each of the following operations (A) and (B) is performed, and then each of the following operations (C) to (E) is performed, and then the raw water treatment operation is restarted. It depends on how the equipment is operated.
【０００９】（Ａ）塔底部から洗浄水および空気を供給
して塔頂部から排出させる洗浄運転。
（Ｂ）下部吊り紐（８）及び濾材（４）が塔内の上方に
伸長した状態で洗浄水および空気の供給を停止した後、
中間抜水管（５４）から塔内の貯留水を抜き出す一部抜
水工程。
（Ｃ）塔底部から塔内の貯留水の全量を抜き出す全量抜
水工程。
（Ｄ）塔底部から洗浄水および空気を供給して塔頂部か
ら排出させる洗浄運転。
（Ｅ）下部吊り紐（８）及び濾材（４）が塔内の上方に
伸長した状態で洗浄水および空気の供給を停止した後、
中間抜水管（５４）から塔内の貯留水を抜き出す一部抜
水工程。(A) A washing operation in which washing water and air are supplied from the bottom of the tower and discharged from the top of the tower. (B) After stopping the supply of washing water and air in a state where the lower suspension string (8) and the filter medium (4) extend upward in the tower,
Partial drainage process of draining stored water in the tower from the intermediate drainage pipe (54). (C) A total water removal process of extracting all the stored water in the tower from the bottom of the tower. (D) A washing operation in which washing water and air are supplied from the tower bottom and discharged from the tower top. (E) After stopping the supply of washing water and air in a state where the lower suspension string (8) and the filter medium (4) extend upward in the tower,
Partial drainage process of draining stored water in the tower from the intermediate drainage pipe (54).
【００１０】[0010]
【発明の実施の形態】以下、本発明を添付図面に基づい
て詳細に説明する。図１は本発明の濁質除去装置の好ま
しい一例の模式的説明図である。図１（ａ）は原水処理
運転の説明図であり、図１（ｂ）は洗浄運転の説明図で
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic explanatory view of a preferred example of the suspended matter removing apparatus of the present invention. FIG. 1A is an explanatory diagram of a raw water treatment operation, and FIG. 1B is an explanatory diagram of a cleaning operation.
【００１１】先ず、本発明の濁質除去装置について説明
する。本発明の濁質除去装置は、下向流形式で原水が供
給され且つ上向流形式で洗浄水が供給される濁質除去装
置である。従って、塔（１）の頂部にはバルブ付の原水
供給配管と洗浄廃水排出配管とが設けられ、塔（１）の
底部にはバルブ付の処理水排出配管と洗浄水供給配管と
空気供給配管とが設けられている。図１に示す装置にお
いては、原水処理運転および洗浄運転で使用される配管
は共通しており、バルブ操作によって通水方向が変更さ
れる。First, the suspended matter removing apparatus of the present invention will be described. The turbidity removal device of the present invention is a turbidity removal device in which raw water is supplied in a downflow type and washing water is supplied in an upflow type. Therefore, a raw water supply pipe with a valve and a washing waste water discharge pipe are provided at the top of the tower (1), and a treated water discharge pipe with a valve, a wash water supply pipe, and an air supply pipe are provided at the bottom of the tower (1). And are provided. In the apparatus shown in FIG. 1, the pipes used in the raw water treatment operation and the cleaning operation are common, and the water flow direction is changed by operating the valve.
【００１２】すなわち、原水処理運転の場合、バルブ
（６１）及び（６２）のみが開状態とされ、濁質を含む
原水は、バルブ（６１）から配管（５１）を経由して塔
（１）内に供給される。この際、濾材（４）は後述する
様に圧密状態を呈し、原水に同伴された濁質は濾材
（４）によって捕捉される。濁質を含まない処理水は、
配管（５２）を経由してバルブ（６２）から排出され
る。That is, in the case of the raw water treatment operation, only the valves (61) and (62) are opened, and the raw water containing suspended matter is passed from the valve (61) through the pipe (51) to the tower (1). Supplied within. At this time, the filter medium (4) is in a compacted state as described later, and the suspended matter entrained in the raw water is captured by the filter medium (4). Treated water that does not contain suspended solids,
It is discharged from the valve (62) via the pipe (52).
【００１３】一方、洗浄運転の場合、原水処理運転時に
開状態であったバルブ（６１）及び（６２）が閉止さ
れ、洗浄水は、バルブ（６４）から配管（５２）を経由
して塔（１）内に供給される。一方、空気は、バルブ
（６３）から配管（５３）を経由して塔（１）内に供給
される。濾材（４）は後述する様に圧密状態を解除し、
濾材（４）から濁質が除去される。空気のバブリング作
用により、濾材（４）が振動させられ、濾材（４）に付
着した濁質の剥離が促進される。濁質を含む洗浄水は、
配管（５１）を経由してバルブ（６５）から排出され
る。On the other hand, in the case of the washing operation, the valves (61) and (62) which were in the open state during the raw water treatment operation are closed, and the washing water is supplied from the valve (64) through the pipe (52) to the tower ( 1) is supplied inside. On the other hand, air is supplied from the valve (63) into the tower (1) via the pipe (53). The filter medium (4) is released from the consolidated state as described later,
Suspended matter is removed from the filter medium (4). The bubbling action of air vibrates the filter medium (4) and promotes the separation of suspended matter attached to the filter medium (4). Wash water containing suspended matter,
It is discharged from the valve (65) via the pipe (51).
【００１４】塔内部には上部支持体（２）と下部支持体
（３）とが配置され、上部支持体（２）と下部支持体
（３）との間には複数の濾材（４）が当該濾材の端部の
上部吊り紐（７）と下部吊り紐（８）とによって懸垂状
態で固定されている。An upper support (2) and a lower support (3) are arranged inside the tower, and a plurality of filter media (4) are provided between the upper support (2) and the lower support (3). It is fixed in a suspended state by an upper hanging string (7) and a lower hanging string (8) at the end of the filter medium.
【００１５】上部支持体（２）及び下部支持体（３）の
構造は、通水を妨げず且つ吊り紐（７）及び（８）によ
って濾材（４）を固定し得る構造である限り、特に制限
されず、例えば、格子構造、目皿構造、編目構造などを
適宜採用し得る。The structure of the upper support (2) and the lower support (3) is not particularly limited as long as it does not prevent water flow and can fix the filter medium (4) by the hanging strings (7) and (8). There is no limitation, and for example, a lattice structure, a perforated structure, a stitch structure, or the like can be appropriately adopted.
【００１６】濾材（４）は、芯紐および当該芯紐の周側
に突設された濁質捕捉材から成る。濾材（４）の芯紐な
らびに上部吊り紐（７）及び下部吊り紐（８）は流水方
向に沿って屈曲変形可能に構成される。斯かる構成は、
素材の種類、形態、太さ等の選択によって達成される。The filter material (4) is composed of a core cord and a turbidity trapping material protruding from the peripheral side of the core cord. The core string of the filter medium (4) and the upper hanging string (7) and the lower hanging string (8) are configured to be bendable and deformable along the flowing direction. Such a configuration is
This is achieved by selecting the type, shape and thickness of the material.
【００１７】上記の各要素は、通常、ポリエステル、ナ
イロン、ポリ塩化ビニリデン等の合成樹脂素材にて構成
される。また、上記の各紐は、組み、撚り、編み、織
り、束ね、くけ又は裁断の各加工で得られた各種の紐の
他、十分な強度を有する限り、単糸（モノフィラメン
ト）も使用することが出来る。また、濾材（４）の濁質
捕捉材の形状は、通常フィルム小片または糸状とされ
る。濾材（４）の一例としては、撚り加工された芯紐の
周側に無数の糸状濁質捕捉材を放射状に突設した濾材が
挙げられる。斯かる濾材は、特開平８−２９９７０７号
に記載されて公知である。なお、濾材（４）の芯紐が長
く濁質捕捉材の突設範囲の両端から突出している場合
は、両端突出部の芯紐を上部吊り紐（７）及び下部吊り
紐（８）として使用することが出来る。Each of the above elements is usually made of a synthetic resin material such as polyester, nylon, or polyvinylidene chloride. Further, as each of the above-mentioned cords, in addition to various cords obtained by braiding, twisting, knitting, weaving, bundling, combing or cutting, single yarn (monofilament) may be used as long as it has sufficient strength. Can be done. The shape of the suspended matter capturing material of the filter medium (4) is usually a film piece or a thread. An example of the filter material (4) is a filter material in which a myriad of thread-like turbidity trapping materials are radially provided on the circumferential side of a twisted core string. Such a filter medium is described in JP-A-8-299707 and is publicly known. When the core cord of the filter medium (4) is long and protrudes from both ends of the projecting range of the suspended matter trapping material, the core cords of both end protruding portions are used as the upper suspension cord (7) and the lower suspension cord (8). You can do it.
【００１８】本発明の濁質除去装置において、上部支持
体（２）と下部支持体（３）との間の距離（ＬＡ）、濾
材（４）の長さ（ＬＢ）、上部吊り紐（７）の長さ（Ｌ
ｂ１）、下部吊り紐（８）の長さ（Ｌｂ２）が以下に規
定する式（１）〜（３）を満足する必要がある。In the suspended matter removing apparatus of the present invention, the distance (LA) between the upper support (2) and the lower support (3), the length of the filter medium (4) (LB), and the upper suspension cord (7). ) Length (L
b1) and the length (Lb2) of the lower hanging string (8) need to satisfy the formulas (1) to (3) defined below.
【００１９】[0019]
【数３】 １．０１×ＬＡ＜（Ｌｂ１＋ＬＢ＋Ｌｂ２）＜２．００×ＬＡ （１） １．０１×ＬＢ＜ＬＡ＜１．５０×ＬＢ （２） １．０１（ＬＢ＋Ｌｂ２）＜ＬＡ＜１．０１（ＬＢ＋Ｌｂ１） （３）[Equation 3] 1.01 × LA <(Lb1 + LB + Lb2) <2.00 × LA (1) 1.01 x LB <LA <1.50 x LB (2) 1.01 (LB + Lb2) <LA <1.01 (LB + Lb1) (3)
【００２０】すなわち、本発明の濁質除去装置におい
て、式（１）に示す様に、濾材（４）と上部支持体
（２）と下部支持体（３）の合計長さ（Ｌｂ１＋ＬＢ＋
Ｌｂ２）は、上部支持体（２）と下部支持体（３）との
間の距離（ＬＡ）より長い。従って、上記の各要素の何
れかは塔（１）内に弛んだ状態で存在する。That is, in the turbidity removing apparatus of the present invention, as shown in the formula (1), the total length (Lb1 + LB +) of the filter medium (4), the upper support (2) and the lower support (3) is obtained.
Lb2) is longer than the distance (LA) between the upper support (2) and the lower support (3). Therefore, any one of the above elements exists in the tower (1) in a loose state.
【００２１】また、式（２）に示す様に、上部支持体
（２）と下部支持体（３）との間の距離（ＬＡ）は、濾
材（４）の長さ（ＬＢ）より長い。従って、上部支持体
（２）と下部支持体（３）との間には流水方向に沿って
濾材（４）が存在しない領域が形成されている。換言れ
ば、流水方向に沿って濾材（４）の可動範囲が形成され
ている。なお、図１の模式的説明図では濾材（４）同士
の間に隙間が存在しているが、実際は濾材（４）同士の
間に隙間はなく、複数の濾材（４）は密状態となる様に
懸垂され、従って、複数の濾材（４）の全体は、流水方
向（上下方向）に沿ってのみ移動する。Further, as shown in the formula (2), the distance (LA) between the upper support (2) and the lower support (3) is longer than the length (LB) of the filter medium (4). Therefore, a region where the filter medium (4) does not exist is formed between the upper support (2) and the lower support (3) along the flowing water direction. In other words, the movable range of the filter medium (4) is formed along the flowing direction. Although there is a gap between the filter media (4) in the schematic explanatory view of FIG. 1, there is actually no gap between the filter media (4), and the plurality of filter media (4) are in a dense state. Thus, the whole of the plurality of filter media (4) moves only along the flowing direction (up and down direction).
【００２２】更に、式（３）に示す様に、濾材（４）と
上部吊り紐（７）との合計長さ（ＬＢ＋Ｌｂ１）は、濾
材（４）と下部吊り紐（８）との合計長さ（ＬＢ＋Ｌｂ
２）より長い。従って、下向流形式で原水が供給される
原水処理運転時においては、図１（ａ）に示す様に、濾
材（４）は下部支持体（３）に当接して下部吊り紐
（８）と共に塔底部近傍で圧密され、上向流形式で洗浄
水が供給される洗浄運転時においては、図１（ｂ）に示
す様に、濾材（４）は上部支持体（２）に当接せずに下
部吊り紐（８）と共に塔内の上方に伸長した状態とな
る。Further, as shown in the equation (3), the total length (LB + Lb1) of the filter medium (4) and the upper suspension cord (7) is equal to the total length of the filter medium (4) and the lower suspension cord (8). Sa (LB + Lb
2) longer. Therefore, during the raw water treatment operation in which the raw water is supplied in the downward flow type, as shown in FIG. 1 (a), the filter medium (4) contacts the lower support body (3) and the lower suspension cord (8). During the cleaning operation in which the cleaning water is supplied near the bottom of the tower and is supplied with the cleaning water in the upward flow mode, the filter medium (4) is brought into contact with the upper support (2) as shown in FIG. 1 (b). Instead, it is in a state of being extended upward in the tower together with the lower hanging string (8).
【００２３】以上の結果、本発明の濁質除去装置におい
ては、原水処理運転時における濾材の圧密状態と洗浄運
転時における濾材の圧密状態の解除とにより、濾材によ
る濁質の捕捉と排出とが効率的に行われる。なお、上記
の式（１）〜（３）で規定された各要素の大小関係の数
値は、装置の経済性を考慮して決定された値である。As a result of the above, in the turbidity removing apparatus of the present invention, trapping and discharging of turbidity by the filter medium can be achieved by releasing the filter medium in the raw water treatment operation and the filter material in the washing operation. Done efficiently. In addition, the numerical value of the magnitude relation of each element defined by the above equations (1) to (3) is a value determined in consideration of the economical efficiency of the device.
【００２４】本発明の濁質除去装置においては、上部支
持体（２）から上部吊り紐（７）の長さ（Ｌｂ１）に相
当する範囲を除く上部支持体（２）と下部支持体（３）
との間の領域であって且つ当該領域の上端および下端か
らそれぞれ当該領域の高さの１０％に相当する範囲を除
く領域の塔側部にはバルブ（６６）付の中間抜水管（５
４）が具備されている。中間抜水管（５４）は、同一高
さの塔側部周囲に複数本設けることも出来る。斯かる中
間抜水管（５４）は、以下に説明する様に洗浄運転を効
率的に行なう機能を有する。In the turbidity removing apparatus of the present invention, the upper support (2) and the lower support (3) are excluded from the upper support (2) except the range corresponding to the length (Lb1) of the upper suspension string (7). )
An intermediate drainage pipe (5) equipped with a valve (66) on the tower side of the region between the upper and lower ends of the region except for the region corresponding to 10% of the height of the region.
4) is provided. It is also possible to provide a plurality of intermediate drainage pipes (54) around the tower side part at the same height. Such an intermediate drainage pipe (54) has a function of efficiently performing a cleaning operation as described below.
【００２５】すなわち、前記の様に構成された本発明の
濁質除去装置の場合、濾材（４）による濁質の捕捉は次
の様に行われる。粒径の大きい濁質は、濾材（４）と衝
突した後の比較的早い段階で捕捉され、図１（ａ）の原
水処理運転の説明図で言えば、濾材（４）の上半分程度
の領域で捕捉される。しかも、濁質除去装置で処理され
る原水には捕捉濁質の粒径の拡大化を図って処理効率を
高めるために凝集剤が一般に添加される。従って、洗浄
運転への切替えが必要とされる通常の時期においては濾
材（４）の下半分程度より上半分程度の領域の方が著し
く汚染されていることとなる。That is, in the case of the suspended matter removing apparatus of the present invention configured as described above, trapping of suspended matter by the filter medium (4) is performed as follows. Suspended matter having a large particle size is captured at a relatively early stage after colliding with the filter medium (4), and in the explanatory view of the raw water treatment operation of FIG. 1 (a), it is about the upper half of the filter medium (4). Captured in the area. In addition, a coagulant is generally added to the raw water treated by the turbidity removal device in order to enlarge the particle size of the trapped turbidity and enhance the treatment efficiency. Therefore, in the normal period when it is necessary to switch to the cleaning operation, the upper half region of the filter medium (4) is significantly contaminated rather than the lower half region.
【００２６】そして、上記の中間抜水管（５４）は、貯
留水の抜き出しによって濾材（４）が水面上に露出する
位置として決定された位置である。従って、中間抜水管
（５４）による貯留水の抜き出し後に行う再度の洗浄運
転において洗浄水と空気を供給した場合は、濾材（４）
の水に漬かっていない部分を上昇する液面が波立って濾
材（４）（特に芯紐の周側に突設された濁質捕捉材）を
激しく揺り動かす。その結果、濁質の高い剥離効果が得
られる。従って、中間抜水管（５４）の位置は、著しく
汚染されている部分の濾材（４）が貯留水の抜き出しに
よって水面上に露出する位置となる様に決定するのが好
ましい。斯かる位置は予備的実験により容易に確認する
ことが出来る。なお、中間抜水管（５４）の位置が余り
に低すぎる場合は、濾材（４）の差ほど汚染されていな
い部分までが液面の波立ちによる濁質剥離処理されて効
率的ではない。The intermediate drainage pipe (54) is a position determined as a position where the filter medium (4) is exposed on the water surface by draining the stored water. Therefore, when the cleaning water and the air are supplied in the second cleaning operation performed after the stored water is extracted by the intermediate drainage pipe (54), the filter medium (4)
The liquid surface rising in the portion not soaked in water swells and violently shakes the filter medium (4) (particularly, the turbidity capturing medium projecting on the peripheral side of the core cord). As a result, a peeling effect with high turbidity can be obtained. Therefore, it is preferable to determine the position of the intermediate drainage pipe (54) so that the filter medium (4) in a portion that is significantly contaminated is exposed on the water surface by draining the stored water. Such a position can be easily confirmed by preliminary experiments. If the position of the intermediate drainage pipe (54) is too low, the portion that is not contaminated as much as the difference in the filter medium (4) will be turbid and peeled off due to the ripple of the liquid surface, which is not efficient.
【００２７】本発明の濁質除去装置の前記した各要素の
寸法は次の通りである。すなわち、上部支持体（２）と
下部支持体（３）との間の距離（ＬＡ）は１００〜４０
０ｃｍ、濾材（４）の長さ（ＬＢ）は７０〜３００ｃ
ｍ、上部吊り紐（７）の長さ（Ｌｂ１）は１０〜２５０
ｃｍ、下部吊り紐（８）の長さ（Ｌｂ２）は５〜２０ｃ
ｍ、塔（１）の直径は２０〜３６０ｃｍである。The dimensions of each of the above-mentioned elements of the suspended matter removing apparatus of the present invention are as follows. That is, the distance (LA) between the upper support (2) and the lower support (3) is 100-40.
0 cm, the length (LB) of the filter medium (4) is 70 to 300 c
m, the length (Lb1) of the upper hanging string (7) is 10 to 250
cm, the length (Lb2) of the lower hanging string (8) is 5 to 20c
m, the diameter of the tower (1) is 20 to 360 cm.
【００２８】次に、本発明に係る濁質除去装置の第１の
運転方法について説明する。本発明の第１の運転方法
は、前記の本発明に係る濁質除去装置を使用し、原水処
理運転と洗浄運転とを繰り返し行なう。Next, the first operation method of the suspended matter removing apparatus according to the present invention will be described. A first operation method of the present invention uses the turbidity removal device of the present invention described above, and repeats a raw water treatment operation and a cleaning operation.
【００２９】原水処理運転（図１（ａ））においては、
前述の様に、バルブ（６１）及び（６２）のみが開状態
とされ、濁質を含む原水は、バルブ（６１）から配管
（５１）を経由して塔（１）内に供給される。原水に同
伴された濁質は濾材（４）によって捕捉される。濁質を
含まない処理水は、配管（５２）を経由してバルブ（６
２）から排出される。In the raw water treatment operation (FIG. 1 (a)),
As described above, only the valves (61) and (62) are opened, and raw water containing suspended matter is supplied from the valve (61) into the tower (1) via the pipe (51). The suspended matter entrained in the raw water is captured by the filter medium (4). Treated water that does not contain turbidity passes through the pipe (52) to the valve (6
It is discharged from 2).
【００３０】そして、原水処理運転において、例えば、
原水供給ポンプ（図示せず）の圧力測定、処理水の水質
分析などの手段により、濁質除去装置の性能が低下した
時点で原水処理運転を停止する。原水処理運転の停止は
一定時間経過毎に自動的行なってもよい。その後、洗浄
運転と原水処理運転への切替え工程とを行なう。本発明
の第１の運転方法の特徴は、洗浄運転と原水処理運転へ
の切替え工程（塔内貯留水の抜水操作）に存する。In the raw water treatment operation, for example,
The raw water treatment operation is stopped when the performance of the turbidity removal device deteriorates by means such as measuring the pressure of the raw water supply pump (not shown) and analyzing the quality of the treated water. The raw water treatment operation may be stopped automatically after a certain period of time. Then, the step of switching to the cleaning operation and the raw water treatment operation is performed. The feature of the first operation method of the present invention lies in the step of switching between the cleaning operation and the raw water treatment operation (draining operation of stored water in the tower).
【００３１】すなわち、本発明の第１の運転方法におい
ては、先ず、次の（Ａ）及び（Ｂ）の各操作を行ない、
次いで、同（Ａ）及び（Ｂ）の各操作を再度行なった
後、原水処理運転を再開する。That is, in the first operating method of the present invention, first, the following operations (A) and (B) are performed,
Next, after performing each of the operations (A) and (B) again, the raw water treatment operation is restarted.
【００３２】（Ａ）塔底部から洗浄水および空気を供給
して塔頂部から排出させる洗浄運転（図１（ｂ））を行
なう。(A) A washing operation (FIG. 1 (b)) in which washing water and air are supplied from the bottom of the tower and discharged from the top of the tower.
【００３３】具体的には、原水処理運転時に開状態であ
ったバルブ（６１）及び（６２）が閉止され、洗浄水
は、バルブ（６４）から配管（５２）を経由して塔
（１）内に供給される。一方、空気は、バルブ（６３）
から配管（５３）を経由して塔（１）内に供給される。
空気の供給は、洗浄水の供給と同時に始めてもよく、ま
た、洗浄水の供給よりも遅れて始めてもよい。濁質を含
む洗浄水は、配管（５１）を経由してバルブ（６５）か
ら排出される。Specifically, the valves (61) and (62) that were in the open state during the raw water treatment operation were closed, and the wash water was passed from the valve (64) through the pipe (52) to the tower (1). Supplied within. On the other hand, air is the valve (63)
Is supplied into the tower (1) via the pipe (53).
The supply of air may start at the same time as the supply of wash water, or may start later than the supply of wash water. The wash water containing suspended matter is discharged from the valve (65) via the pipe (51).
【００３４】洗浄運転は、少なくとも、下部吊り紐
（８）及び濾材（４）が塔内の上方に伸長するまで行な
う必要がある。しかしながら、濾材（４）の上部に濃縮
された濁質が除去されるまでの長時間の洗浄運転は、多
量の洗浄水を使用して不経済となるので行なう必要はな
い。The washing operation needs to be performed at least until the lower hanging string (8) and the filter medium (4) extend upward in the column. However, it is not necessary to perform a long-time washing operation until the concentrated suspended matter on the upper part of the filter medium (4) is removed because it is uneconomical to use a large amount of washing water.
【００３５】（Ｂ）下部吊り紐（８）及び濾材（４）が
塔内の上方に伸長した状態で洗浄水および空気の供給を
停止した後、中間抜水管（５４）から塔内の貯留水を抜
き出す一部抜水工程を行なう。斯かる操作により、著し
く汚染されている部分の濾材（４）が貯留水の抜き出し
によって水面上に露出する。(B) After stopping the supply of washing water and air with the lower hanging string (8) and the filter medium (4) extending upward in the tower, the stored water in the tower is drained from the intermediate drainage pipe (54). Partial drainage process is carried out. By such an operation, the filter medium (4) in a portion that is significantly contaminated is exposed on the water surface by extracting the stored water.
【００３６】上記の各操作（Ａ）及び（Ｂ）の繰り返し
は、１回に限らず、必要に応じ、複数回行なってもよ
い。そして、必ず行われる１回の繰り返しの前記（Ａ）
操作において、液面の波立による濁質剥離処理が行わ
れ、濾材（４）から濁質が効果的に剥離される。The above operations (A) and (B) are not limited to being repeated once, but may be repeated a plurality of times as necessary. And the above-mentioned (A), which is always repeated once
In the operation, the suspended matter is removed by the ripple of the liquid surface, and the suspended matter is effectively removed from the filter medium (4).
【００３７】本発明の第１の運転方法は、主に、濾材
（４）自体の汚れが著しくない場合に適用され、そし
て、特に貯留水の抜き出し時間の短縮が図られる利点が
ある。すなわち、塔底部から貯留水の全量を抜き出す場
合は、密状態となる様に懸垂された濾材（４）の間を通
して抜き出しが行われるために貯留水の抜き出に長時間
を要する。これに対し、本発明の第１の運転方法の場合
は、一部抜水工程として塔側部に具備された中間抜水管
（５４）から抜き出しを行なうため、貯留水の抜き出し
時間が大幅に短縮され、原水処理運転への切替えを早期
に行なうことが出来る。また、本発明の第１の運転方法
の場合は、貯留水を一部しか抜き出さないため、洗浄水
の量を軽減することも出来る。The first operation method of the present invention is mainly applied to the case where the filter medium (4) itself is not significantly contaminated, and has an advantage that the withdrawal time of stored water can be shortened. That is, when the whole amount of the stored water is extracted from the bottom of the tower, it takes a long time to extract the stored water because it is extracted through the filter media (4) suspended in a dense state. On the other hand, in the case of the first operation method of the present invention, the drainage time of the stored water is significantly reduced because the drainage is performed from the intermediate drainage pipe (54) provided on the tower side part as a partial drainage process. Therefore, it is possible to quickly switch to the raw water treatment operation. Further, in the case of the first operation method of the present invention, since the stored water is only partially extracted, the amount of wash water can be reduced.
【００３８】次に、本発明に係る濁質除去装置の第２の
運転方法について説明する。本発明の第２の運転方法
は、前記の第１の運転方法において、（Ａ）及び（Ｂ）
の各操作を行なった後、同（Ａ）及び（Ｂ）の各操作を
再度行なうのに代えて、次の（Ｃ）〜（Ｅ）の各操作を
行なった後、原水処理運転を再開する。Next, the second operation method of the suspended matter removing apparatus according to the present invention will be described. A second operating method of the present invention is the same as the first operating method described above, except that (A) and (B)
After performing each of the operations, the raw water treatment operation is restarted after performing each of the following operations (C) to (E) instead of performing each of the operations (A) and (B) again. .
【００３９】（Ｃ）塔底部から塔内の貯留水の全量を抜
き出す全量抜水工程を行なう。具体的には、再度、バル
ブ（６２）が開状態とされ、塔内の貯留水の全量は、配
管（５２）を経由してバルブ（６２）から排出される。
濁質濃度の高い貯留水は、上記（Ｂ）操作（一部抜水工
程）で抜き出されているため、塔底部からの抜き出しを
行なっても塔内の大きな汚染は起こらない。(C) A total water removal process is carried out in which all the stored water in the tower is withdrawn from the bottom of the tower. Specifically, the valve (62) is opened again, and the entire amount of the stored water in the tower is discharged from the valve (62) via the pipe (52).
Since the stored water having a high turbidity concentration is extracted in the operation (B) (partial drainage step), even if it is extracted from the bottom of the column, no major pollution occurs in the column.
【００４０】（Ｄ）塔底部から洗浄水および空気を供給
して塔頂部から排出させる洗浄運転を行なう。すなわ
ち、前記（Ａ）と同様の操作を行なう。具体的には、上
記の（Ｃ）の操作で開状態であったバルブ（６２）が閉
止され、洗浄水は、バルブ（６４）から配管（５２）を
経由して塔（１）内に供給される。一方、空気は、バル
ブ（６３）から配管（５３）を経由して塔（１）内に供
給される。(D) A washing operation is performed in which washing water and air are supplied from the bottom of the tower and discharged from the top of the tower. That is, the same operation as the above (A) is performed. Specifically, the valve (62) that was opened by the operation of (C) above is closed, and the wash water is supplied from the valve (64) into the tower (1) via the pipe (52). To be done. On the other hand, air is supplied from the valve (63) into the tower (1) via the pipe (53).
【００４１】上記の（Ｄ）操作（洗浄運転）は、塔
（１）内に水が全くない状態から開始されるため、要す
るに、水に漬かっていない濾材（４）中に洗浄水と空気
とが供給されるため、液面の波立による濁質剥離処理が
濾材（４）の全体について行われる。従って、本発明の
第２の運転方法は、主に、濾材（４）自体の汚れが著し
い場合に適用される。斯かる（Ｄ）操作は、前記の
（Ａ）操作と同様、少なくとも、下部吊り紐（８）及び
濾材（４）が塔内の上方に伸長するまで行なう必要があ
る。Since the above operation (D) (washing operation) is started from the state where there is no water in the tower (1), in short, washing water and air are mixed in the filter medium (4) which is not soaked in water. Is supplied, the turbidity peeling process by the ripple of the liquid surface is performed on the entire filter medium (4). Therefore, the second operating method of the present invention is mainly applied when the filter medium (4) itself is significantly contaminated. The operation (D) needs to be performed at least until the lower hanging string (8) and the filter medium (4) extend upward in the column, as in the operation (A).
【００４２】（Ｅ）下部吊り紐（８）及び濾材（４）が
塔内の上方に伸長した状態で洗浄水および空気の供給を
停止した後、中間抜水管（５４）から塔内の貯留水を抜
き出す一部抜水工程を行なう。斯かる（Ｅ）操作は、前
記の（Ｂ）操作と同様に行われる。(E) After stopping the supply of washing water and air with the lower hanging string (8) and the filter medium (4) extending upward in the tower, the stored water in the tower is drained from the intermediate drainage pipe (54). Partial drainage process is carried out. The operation (E) is performed in the same manner as the operation (B).
【００４３】[0043]
【発明の効果】以上説明した本発明によれば、簡単な構
成の採用により、洗浄運転を効率的に行い得る様に改良
された濁質除去装置が提供される。よって、本発明の工
業的価値は顕著である。According to the present invention described above, an improved suspended matter removing apparatus is provided so that the cleaning operation can be efficiently performed by adopting a simple structure. Therefore, the industrial value of the present invention is remarkable.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の濁質除去装置の好ましい一例の模式的
説明図FIG. 1 is a schematic explanatory view of a preferred example of a suspended matter removing apparatus of the present invention.
１：塔 ２：上部支持体 ３：下部支持体 ４：濾材 ７：上部吊り紐 ８：下部吊り紐 ５４：中間抜水管 ５１〜５３：配管 ６１〜６６：バルブ 1: tower 2: Upper support 3: Lower support 4: Filter material 7: Upper hanging string 8: Lower hanging string 54: Intermediate drainage pipe 51-53: Piping 61-66: Valve
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０１Ｄ 29/38 ５８０Ｃ ５８０Ｈ ─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. 7 Identification Code FI Theme Coat (Reference) B01D 29/38 580C 580H
Claims (3)
形式で洗浄水が供給される濁質除去装置であって、塔
（１）の頂部にはバルブ付の原水供給配管と洗浄廃水排
出配管とが設けられ、塔（１）の底部にはバルブ付の処
理水排出配管と洗浄水供給配管と空気供給配管とが設け
られ、塔内部には上部支持体（２）と下部支持体（３）
とが配置され、上部支持体（２）と下部支持体（３）と
の間には芯紐および当該芯紐の周側に突設された濁質捕
捉材から成る複数の濾材（４）が当該濾材の端部の上部
吊り紐（７）と下部吊り紐（８）とによって懸垂状態で
固定され、濾材（４）の芯紐ならびに上部吊り紐（７）
及び下部吊り紐（８）は流水方向に沿って屈曲変形可能
に構成され、上部支持体（２）と下部支持体（３）との
間の距離（ＬＡ）、濾材（４）の長さ（ＬＢ）、上部吊
り紐（７）の長さ（Ｌｂ１）、下部吊り紐（８）の長さ
（Ｌｂ２）の関係が以下に規定する式（１）〜（３）を
満足し、そして、上部支持体（２）から上部吊り紐
（７）の長さ（Ｌｂ１）に相当する範囲を除く上部支持
体（２）と下部支持体（３）との間の領域であって且つ
当該領域の上端および下端からそれぞれ当該領域の高さ
の１０％に相当する範囲を除く領域の塔側部にはバルブ
（６６）付の中間抜水管（５４）が具備されていること
特徴とする濁質除去装置。 【数１】 １．０１×ＬＡ＜（Ｌｂ１＋ＬＢ＋Ｌｂ２）＜２．００×ＬＡ （１） １．０１×ＬＢ＜ＬＡ＜１．５０×ＬＢ （２） １．０１（ＬＢ＋Ｌｂ２）＜ＬＡ＜１．０１（ＬＢ＋Ｌｂ１） （３）1. A turbidity removal device in which raw water is supplied in a downward flow format and washing water is supplied in an upward flow format, and a raw water supply pipe with a valve and a cleaning pipe are provided at the top of a tower (1). A waste water discharge pipe is provided, a treated water discharge pipe with a valve, a wash water supply pipe, and an air supply pipe are provided at the bottom of the tower (1), and an upper support (2) and a lower support are provided inside the tower. Body (3)
Between the upper support (2) and the lower support (3), and a plurality of filter media (4) consisting of a core cord and a suspended matter trapping material projecting from the peripheral side of the core cord. It is fixed in a suspended state by the upper hanging string (7) and the lower hanging string (8) at the end of the filter medium, and the core string of the filter medium (4) and the upper hanging string (7).
The lower suspension string (8) is configured to be bendable and deformable along the flowing direction, and the distance (LA) between the upper support (2) and the lower support (3) and the length of the filter medium (4) ( LB), the length (Lb1) of the upper hanging string (7), and the length (Lb2) of the lower hanging string (8) satisfy the expressions (1) to (3) defined below, and the upper part The region between the upper support (2) and the lower support (3) excluding the range corresponding to the length (Lb1) of the upper suspension string (7) from the support (2) and the upper end of the region. And an intermediate drainage pipe (54) with a valve (66) is provided on the tower side part of the region excluding the range corresponding to 10% of the height of the region from the bottom and the lower end, respectively. . ## EQU1 ## 1.01 × LA <(Lb1 + LB + Lb2) <2.00 × LA (1) 1.01 × LB <LA <1.50 × LB (2) 1.01 (LB + Lb2) <LA <1.01 (LB + Lb1) (3)
法であって、原水処理運転停止後、先ず、次の（Ａ）及
び（Ｂ）の各操作を行ない、次いで、同（Ａ）及び
（Ｂ）の各操作を再度行なった後、原水処理運転を再開
することを特徴とする濁質除去装置の運転方法。 （Ａ）塔底部から洗浄水および空気を供給して塔頂部か
ら排出させる洗浄運転。 （Ｂ）下部吊り紐（８）及び濾材（４）が塔内の上方に
伸長した状態で洗浄水および空気の供給を停止した後、
中間抜水管（５４）から塔内の貯留水を抜き出す一部抜
水工程。2. The method for operating the turbidity removal apparatus according to claim 1, wherein after the raw water treatment operation is stopped, first, the following operations (A) and (B) are performed, and then the same (A) ) And (B) are performed again, and then the raw water treatment operation is restarted. (A) A washing operation in which wash water and air are supplied from the bottom of the tower and discharged from the top of the tower. (B) After stopping the supply of washing water and air in a state where the lower suspension string (8) and the filter medium (4) extend upward in the tower,
Partial drainage process of draining stored water in the tower from the intermediate drainage pipe (54).
法であって、原水処理運転停止後、先ず、次の（Ａ）及
び（Ｂ）の各操作を行ない、次いで、次の（Ｃ）〜
（Ｅ）の各操作を行なった後、原水処理運転を再開する
ことを特徴とする濁質除去装置の運転方法。 （Ａ）塔底部から洗浄水および空気を供給して塔頂部か
ら排出させる洗浄運転。 （Ｂ）下部吊り紐（８）及び濾材（４）が塔内の上方に
伸長した状態で洗浄水および空気の供給を停止した後、
中間抜水管（５４）から塔内の貯留水を抜き出す一部抜
水工程。 （Ｃ）塔底部から塔内の貯留水の全量を抜き出す全量抜
水工程。 （Ｄ）塔底部から洗浄水および空気を供給して塔頂部か
ら排出させる洗浄運転。 （Ｅ）下部吊り紐（８）及び濾材（４）が塔内の上方に
伸長した状態で洗浄水および空気の供給を停止した後、
中間抜水管（５４）から塔内の貯留水を抜き出す一部抜
水工程。3. The method for operating the turbidity removing apparatus according to claim 1, wherein after the raw water treatment operation is stopped, first, the following operations (A) and (B) are performed, and then the next ( C) ~
After performing each operation of (E), the raw water processing operation is restarted, The operating method of the suspended matter removal apparatus characterized by the above-mentioned. (A) A washing operation in which wash water and air are supplied from the bottom of the tower and discharged from the top of the tower. (B) After stopping the supply of washing water and air in a state where the lower suspension string (8) and the filter medium (4) extend upward in the tower,
Partial drainage process of draining stored water in the tower from the intermediate drainage pipe (54). (C) A total water removal process of extracting all the stored water in the tower from the bottom of the tower. (D) A washing operation in which washing water and air are supplied from the tower bottom and discharged from the tower top. (E) After stopping the supply of washing water and air in a state where the lower suspension string (8) and the filter medium (4) extend upward in the tower,
Partial drainage process of draining stored water in the tower from the intermediate drainage pipe (54).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001189445A JP2003038912A (en) | 2001-05-25 | 2001-06-22 | Suspended matter removing apparatus and operation method therefor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001157397 | 2001-05-25 | ||
| JP2001-157397 | 2001-05-25 | ||
| JP2001189445A JP2003038912A (en) | 2001-05-25 | 2001-06-22 | Suspended matter removing apparatus and operation method therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003038912A true JP2003038912A (en) | 2003-02-12 |
Family
ID=26615732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001189445A Withdrawn JP2003038912A (en) | 2001-05-25 | 2001-06-22 | Suspended matter removing apparatus and operation method therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003038912A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010196592A (en) * | 2009-02-25 | 2010-09-09 | Kubota Corp | Mechanical governor for engine |
| JP2011011125A (en) * | 2009-06-30 | 2011-01-20 | Hymo Corp | Water treatment method |
-
2001
- 2001-06-22 JP JP2001189445A patent/JP2003038912A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010196592A (en) * | 2009-02-25 | 2010-09-09 | Kubota Corp | Mechanical governor for engine |
| JP2011011125A (en) * | 2009-06-30 | 2011-01-20 | Hymo Corp | Water treatment method |
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