JP2003053113A - Method for operating apparatus for removing turbid component - Google Patents
Method for operating apparatus for removing turbid componentInfo
- Publication number
- JP2003053113A JP2003053113A JP2001247221A JP2001247221A JP2003053113A JP 2003053113 A JP2003053113 A JP 2003053113A JP 2001247221 A JP2001247221 A JP 2001247221A JP 2001247221 A JP2001247221 A JP 2001247221A JP 2003053113 A JP2003053113 A JP 2003053113A
- Authority
- JP
- Japan
- Prior art keywords
- tower
- water
- washing
- filter medium
- 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.)
- Granted
Links
Landscapes
- 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の運転
方法に関する。TECHNICAL FIELD The present invention relates to a method for operating a suspended matter removing apparatus.
【0002】[0002]
【従来の技術】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。上記の濁質除去装置の運転方法は、原水処理
運転と複数回の洗浄運転とを繰り返し行なうことから成
り、全ての洗浄運転の洗浄水には濁質除去処理水が使用
される。2. Description of the Related Art As a device for removing suspended solids (turbidity) in raw water, a turbidity removing device in which raw water is supplied in a downflow type and washing water is supplied in an upflow type, A turbidity removing device is effective between the supports arranged above and below the pressurizing unit when the raw water is supplied to form a consolidated state by being pressed by the lower support and to release the consolidated state when the cleaning water is supplied. Is. 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. The operation method of the above-mentioned turbidity removal apparatus consists of repeatedly performing the raw water treatment operation and the cleaning operation a plurality of times, and the turbidity removal treated water is used as the cleaning water in all the cleaning operations.
【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の運
転方法であって、洗浄運転で使用する洗浄水のコストダ
ウンを図った濁質除去装置の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 method of operating a turbidity removing device having a structure according to claim 1, wherein the method of operating a turbidity removing device is intended to reduce the cost of cleaning water used in the cleaning operation.
【0004】[0004]
【課題を解決するための手段】すなわち、本発明の要旨
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
にはバルブ付であって且つ原水タンクに連結された原水
供給配管とバルブ付の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(L
b1)、下部吊り紐(8)の長さ(Lb2)の関係が以
下に規定する式(1)〜(3)を満足する濁質除去装置
(A)の運転方法であって、原水処理運転と複数回の洗
浄運転とを繰り返し行なうことから成り、少なくとも最
終回の洗浄運転の洗浄水には濁質除去処理水を使用し、
その前の少なくとも一部の洗浄運転の洗浄水には原水を
使用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。That is, the gist of the present invention is a turbidity removing device in which raw water is supplied in a downflow type and washing water is supplied in an upflow type, which is a tower (1). At the top of the, there is provided a raw water supply pipe with a valve and connected to a raw water tank, and a cleaning wastewater discharge pipe with a valve,
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 (3) are arranged inside the tower. Between the upper support (2) and the lower support (3), a plurality of filter media (4) composed of a core cord and a suspended matter trapping material projecting from the peripheral side of the core cord are provided at the ends of the filter media. The upper part of the hanging part (7) and the lower part of the hanging string (8) are fixed in a suspended state, and the filter medium (4)
Core string and upper hanging string (7) and lower hanging string (8)
Is configured to be bendable and deformable along the direction of flowing water, and the distance (LA) between the upper support (2) and the lower support (3), the length (LB) of the filter medium (4), and the upper hanging string ( 7) Length (L
b1) and the length (Lb2) of the lower suspension string (8) satisfy the equations (1) to (3) defined below, which is a method of operating the turbidity removal device (A), and a raw water treatment operation And a plurality of washing operations are repeated, and at least the final washing operation uses the turbidity removal treated water as the washing water.
The present invention resides in a method of operating a turbidity removing device, characterized in that raw water is used as washing water in at least part of the washing operation before that.
【0005】[0005]
【数6】 (Lb1+LB+Lb2)<LA (1) LA<LB (2) (LB+Lb2)<LA<(LB+Lb1) (3)[Equation 6] (Lb1 + LB + Lb2) <LA (1) LA <LB (2) (LB + Lb2) <LA <(LB + Lb1) (3)
【0006】[0006]
【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1〜3は、それぞれ、本発明にお
ける濁質除去装置の好ましい一例の模式的説明図であ
る。各図の(a)は原水処理運転の説明図であり、
(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. 1 to 3 are schematic explanatory views of a preferred example of the suspended matter removing apparatus according to the present invention. (A) of each figure is an explanatory diagram of the raw water treatment operation,
(B) is an explanatory view of the cleaning operation.
【0007】先ず、図1に示す濁質除去装置について説
明する。本発明で使用する濁質除去装置は、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
ブ付であって且つ原水タンクに連結された原水供給配管
とバルブ付の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 shown in FIG. 1 will be described. The turbidity removal device used in 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, at the top of the tower (1), there is provided a raw water supply pipe having a valve and connected to a raw water tank, and a cleaning wastewater discharge pipe having a valve.
At the bottom of the unit, a treated water discharge pipe with a valve, a wash water supply pipe, and an air supply pipe 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.
【0008】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).
【0009】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).
【0010】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.
【0011】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 so long as it does not impede the passage of water and the filter media (4) can be fixed 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.
【0012】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 medium (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.
【0013】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.
【0014】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(Lb1)、
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 device, the upper support (2)
(LA) between the lower support (3) and the lower support (3), filter media (4)
Length (LB), length of the upper hanging string (7) (Lb1),
The length (Lb2) of the lower hanging string (8) needs to satisfy the expressions (1) to (3) defined below.
【0015】[0015]
【数7】 (Lb1+LB+Lb2)<LA (1) LA<LB (2) (LB+Lb2)<LA<(LB+Lb1) (3)[Equation 7] (Lb1 + LB + Lb2) <LA (1) LA <LB (2) (LB + Lb2) <LA <(LB + Lb1) (3)
【0016】すなわち、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, as shown in the formula (1), the total length (Lb1 + LB + Lb2) of the filter medium (4), the upper support (2) and the lower support (3).
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.
【0017】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).
【0018】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 formula (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).
【0019】以上の結果、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。As a result of the above, in the turbidity removing apparatus, the filter material is efficiently trapped and discharged by the filter material being compressed during the raw water treatment operation and being released from the cleaning operation during the washing operation. Done.
【0020】本発明で使用する濁質除去装置において、
前記の各要素は、以下に規定する式(1’)〜(3’)
を満足するのが好ましい。式(1’)〜(3’)中の各
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。In the suspended matter removing apparatus used in the present invention,
Each of the above elements is represented by the following formulas (1 ′) to (3 ′)
It is preferable to satisfy The numerical value of the magnitude relation of each element in the equations (1 ′) to (3 ′) is a value determined in consideration of the economical efficiency of the device.
【0021】[0021]
【数8】 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 8] 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 ')
【0022】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100〜400cm、
濾材(4)の長さ(LB)は70〜300cm、上部吊
り紐(7)の長さ(Lb1)は10〜250cm、下部
吊り紐(8)の長さ(Lb2)は5〜20cm、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 are as follows. That is, the distance (LA) between the upper support (2) and the lower support (3) is 100 to 400 cm,
The length (LB) of the filter medium (4) is 70 to 300 cm, 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 20 cm, and the tower. The diameter of (1) is 20 to 360 cm.
【0023】次に、図1に示す濁質除去装置の運転方法
について説明する。本濁質除去装置の運転方法は、原水
処理運転と複数回の洗浄運転とを繰り返し行なうことか
ら成る。Next, an operation method of the suspended matter removing apparatus shown in FIG. 1 will be described. The operation method of the present turbidity removal apparatus consists of repeatedly performing a raw water treatment operation and a plurality of washing operations.
【0024】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).
【0025】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。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.
【0026】洗浄運転( 図1(b))においては、前
述の様に、原水処理運転時に開状態であったバルブ(6
1)及び(62)が閉止され、洗浄水は、バルブ(6
4)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。こ
の際、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。
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。ここまでの
操作で第1回目の洗浄運転が終了する。In the washing operation (FIG. 1 (b)), as described above, the valve (6) which was in the open state during the raw water treatment operation was used.
1) and (62) are closed, and the washing water flows through the valve (6
4) is supplied into the tower (1) via the pipe (52). On the other hand, air is supplied from the valve (63) 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). At this time, the filter medium (4) does not come into contact with the upper support (2) and is in a state of extending upward in the tower together with the lower suspension string (8).
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. The operation up to this point completes the first washing operation.
【0027】次いで、バルブ(64)及びバルブ(6
3)を閉止し、バルブ(62)のみが開状態とされる。
これにより、塔内の貯留水が抜き出され、図1(a)に
示す状態となり、第2回目の洗浄運転の準備が完了す
る。引き続き、上記と同様の操作を繰り返し、第2回目
の洗浄運転を行なう。斯かる複数回の洗浄運転の回数
は、特に制限されず、濾材(4)の洗浄効果を勘案して
適宜決定される。Then, the valve (64) and the valve (6
3) is closed and only the valve (62) is opened.
As a result, the stored water in the tower is extracted, the state shown in FIG. 1A is reached, and the preparation for the second cleaning operation is completed. Subsequently, the same operation as above is repeated to perform the second washing operation. The number of such plural cleaning operations is not particularly limited and is appropriately determined in consideration of the cleaning effect of the filter medium (4).
【0028】本発明は、上記の様に行われる複数回の洗
浄運転において、少なくとも最終回の洗浄運転の洗浄水
には濁質除去処理水を使用し、その前の少なくとも一部
の洗浄運転の洗浄水には原水を使用することを特徴とす
る。洗浄運転が2回行われる場合は、第1回目の洗浄運
転の洗浄水には原水を使用し、第2回目の洗浄運転の洗
浄水には濁質除去処理水を使用する。ここで、濁質除去
処理水としては、濾過器や膜(逆浸透膜、限外濾過膜、
精密濾過膜など)で処理された水の他、本発明で使用す
る濁質除去装置で処理した水が使用される。According to the present invention, in a plurality of cleaning operations performed as described above, the suspended water is used as the cleaning water for at least the final cleaning operation, and at least a part of the cleaning operation before the cleaning operation is performed. The feature is that raw water is used as washing water. When the washing operation is performed twice, raw water is used as the washing water in the first washing operation, and suspended solid treatment water is used as the washing water in the second washing operation. Here, as the turbidity removal treated water, a filter or a membrane (reverse osmosis membrane, ultrafiltration membrane,
In addition to water treated with a microfiltration membrane, etc., water treated with the suspended matter removing device used in the present invention is used.
【0029】上記の様な洗浄水の種類の切替えは、例え
ば、バルブ(64)の後方の配管(52)に切替えバル
ブ(図示せず)を設置し且つ当該切替えバルブに原水供
給配管を接続することによって行なうことが出来る。な
お、この場合、配管(52)からは濁質除去処理水が供
給される。To switch the type of wash water as described above, for example, a switching valve (not shown) is installed in the pipe (52) behind the valve (64) and the raw water supply pipe is connected to the switching valve. It can be done by In this case, turbidity removal treated water is supplied from the pipe (52).
【0030】次に、図2に示す濁質除去装置について説
明する。図2に示す濁質除去装置は、以下の様な中間抜
水管が設けられている点を除き、図1に示す濁質除去装
置と同じである。Next, the suspended matter removing device shown in FIG. 2 will be described. The turbidity removing apparatus shown in FIG. 2 is the same as the turbidity removing apparatus shown in FIG. 1 except that the following intermediate drainage pipe is provided.
【0031】すなわち、図2に示す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(54)が具備されている。中間抜水管(5
4)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。That is, in the turbidity removing apparatus shown in FIG. 2, the upper support (2) and the lower support except the range corresponding to the length (Lb1) of the upper suspension string (7) from the upper support (2). A column (66) is provided in the middle of the region between the body (3) and the column side part of the region excluding the regions corresponding to 10% of the height of the region from the upper end and the lower end of the region. A water pipe (54) is provided. Intermediate drainage pipe (5
It is also possible to provide a plurality of 4) around the tower side part of the same height. Such an intermediate drainage pipe (54) has a function of efficiently performing a cleaning operation as described below.
【0032】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2(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. 2 (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.
【0033】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 the position determined as the 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.
【0034】次に、図2に示す濁質除去装置の第1の運
転方法について説明する。原水処理運転と複数回の洗浄
運転とを繰り返し行なう点は前記と同じである。そし
て、複数回の洗浄運転は、次の(A)及び(B)の各操
作を行なった後に同(A)及び(B)の各操作を再度行
なうことから成る。そして、洗浄運転が2回行われる場
合は、第1回目の洗浄運転の洗浄水には原水を使用し、
第2回目の洗浄運転の洗浄水には濁質除去処理水を使用
する。Next, a first operation method of the suspended matter removing apparatus shown in FIG. 2 will be described. The point that the raw water treatment operation and the cleaning operation are repeated a plurality of times is the same as above. Then, the plurality of cleaning operations consist of performing the following operations (A) and (B) and then performing each operation (A) and (B) again. When the cleaning operation is performed twice, raw water is used as the cleaning water for the first cleaning operation,
As the cleaning water for the second cleaning operation, turbidity removal treated water is used.
【0035】(A)塔底部から洗浄水(原水)及び空気
を供給して塔頂部から排出させる洗浄運転(図2
(b))を行なう。具体的な方法は、図1に示す濁質除
去装置の運転方法の場合と同じである。(A) Washing operation in which wash water (raw water) and air are supplied from the bottom of the tower and discharged from the top of the tower (FIG. 2)
(B)) is performed. The specific method is the same as the case of the operation method of the suspended solid removing apparatus shown in FIG.
【0036】(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(原水)及び空気の
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 (raw water) and air in a state where the lower hanging string (8) and the filter medium (4) extend upward in the tower, the inside of the tower is removed from the intermediate drainage pipe (54). Perform a partial draining process to drain the stored water. 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.
【0037】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。通常は3回行われ、第3回目の洗浄運転の洗浄水に
は濁質除去処理水を使用する。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. Usually, it is carried out three times, and the suspended water-removing treated water is used as the washing water in the third washing operation. And one that is always done
In the operation (A), which is repeated twice, the suspended matter is removed by the ripples on the liquid surface, and the suspended matter is effectively removed from the filter medium (4).
【0038】上記の第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、上記の第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、上記の第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 above-mentioned first operation method is mainly applied when the filter medium (4) itself is not significantly contaminated, and has an advantage that the withdrawal time of the 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 described above, since the water is extracted from the intermediate drainage pipe (54) provided on the tower side part as a part of the water removal step, the extraction time of the stored water is significantly shortened. , It is possible to switch to raw water treatment operation early. Further, in the case of the above-mentioned first operating method, since the stored water is only partially extracted, the amount of wash water can be reduced.
【0039】次に、図2に示す濁質除去装置の第2の運
転方法について説明する。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)の各操作を行なう。そし
て、洗浄運転が2回行われる場合は、第1回目の洗浄運
転の洗浄水には原水を使用し、第2回目の洗浄運転の洗
浄水には濁質除去処理水を使用する。Next, the second operation method of the suspended matter removing apparatus shown in FIG. 2 will be described. The second operating method is the same as the first operating method, except that after performing the operations (A) and (B), the operations (A) and (B) are performed again. The following operations (C) to (E) are performed. When the cleaning operation is performed twice, raw water is used as the cleaning water for the first cleaning operation and turbidity removal treated water is used as the cleaning water for the second cleaning operation.
【0040】(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.
【0041】(D)塔底部から洗浄水(濁質除去処理
水)及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(濁質除去処理水)
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 (water for removing suspended matter) 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 washing water (water for removing suspended matter)
Is supplied from the valve (64) into the tower (1) via the pipe (52). On the other hand, air is the valve (63)
Is supplied into the tower (1) via the pipe (53).
【0042】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、上記の第
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。The above-mentioned operation (D) (cleaning operation) is started from a state where there is no water in the tower (1), so 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 operation method described above is mainly applied when the filter medium (4) itself is significantly contaminated. The operation (D) is the same as the operation (A) described above.
Similar to the operation, at least until the lower hanging string (8) and the filter medium (4) extend upward in the tower.
【0043】(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(濁質除去処理水)
及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) Washing water (water for removing suspended matter) in a state where the lower hanging string (8) and the filter medium (4) extend upward in the tower.
And after stopping the supply of air, a partial water withdrawal step of withdrawing the stored water in the tower from the intermediate water withdrawal pipe (54) is performed. The operation (E) is performed in the same manner as the operation (B).
【0044】次に、図3に示す濁質除去装置について説
明する。図3に示す濁質除去装置は、以下の様な中間抜
水管が設けられている点を除き、図1に示す濁質除去装
置と同じである。Next, the turbidity removing device shown in FIG. 3 will be described. The turbidity removing apparatus shown in FIG. 3 is the same as the turbidity removing apparatus shown in FIG. 1 except that the following intermediate drainage pipe is provided.
【0045】すなわち、図3に示す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)±10%の範囲に相当する距離分下方の塔側
部にはバルブ(66)付の中間抜水管(54)が具備さ
れている。更に、好ましい態様として、下部支持体
(3)から濾材(4)及び下部吊り紐(8)の合計長さ
(LB+Lb2)±10%の範囲に相当する距離分上方
の塔側部にはバルブ(67)付の中間抜水管(55)が
具備されている。各中間抜水管(54)及び(55)
は、同一高さの塔側部周囲に複数本設けることも出来
る。That is, in the turbidity removing apparatus shown in FIG. 3, the tower side portion below the upper support (2) by a distance corresponding to the range of the length (Lb1) ± 10% of the upper suspension string (7). Is equipped with an intermediate drainage pipe (54) with a valve (66). Furthermore, as a preferred embodiment, a valve () is provided on the side of the tower above the lower support (3) by a distance corresponding to the total length (LB + Lb2) ± 10% of the filter medium (4) and the lower suspension string (8). An intermediate drainage pipe (55) with 67) is provided. Each intermediate drain pipe (54) and (55)
It is also possible to provide a plurality of towers around the same side of the tower.
【0046】上記の各中間抜水管(54)及び(55)
は、何れも、洗浄運転から原水処理運転への切替え工程
(洗浄運転後の抜水工程)を良好に行なう機能を有す
る。Each of the above intermediate drainage pipes (54) and (55)
Both have the function of favorably performing the process of switching from the cleaning operation to the raw water treatment operation (the water removal process after the cleaning operation).
【0047】すなわち、上向流形式で洗浄水が供給され
る洗浄運転においては、濾材(4)から排出された濁質
は塔頂部に向かって濃縮された状態となり、特に、全体
がピストン的に上昇した濾材(4)の上部において濁質
の濃度が高い。従って、塔内の貯留水の抜き出しは、濃
縮された濁質による濾材の再汚染を避けるために塔側部
に具備された中間抜水管から行なう必要がある。中間抜
水管(54)の前記の位置は、貯留水の抜き出しによっ
て濾材(4)が水面上に露出することがない位置(上部
支持体(2)から上部吊り紐(7)の長さ(Lb1)に
相当する位置)、更に許容範囲(±10%)を考慮して
決定された位置である。また、中間抜水管(55)の前
記の位置は、濁質の濃度が特に高い濾材(4)の上部の
貯留水を抜き出すために決定された位置である。That is, in the washing operation in which the washing water is supplied in the upward flow type, the suspended matter discharged from the filter medium (4) is concentrated toward the top of the column, and particularly, the whole is like a piston. Concentration of suspended matter is high in the upper part of the raised filter medium (4). Therefore, it is necessary to extract the stored water in the tower from the intermediate drain pipe provided on the side of the tower in order to avoid recontamination of the filter medium with the concentrated suspended matter. The above-mentioned position of the intermediate drainage pipe (54) is a position (the length from the upper support (2) to the upper suspension string (7) (Lb1) where the filter medium (4) is not exposed on the water surface by draining the stored water. The position corresponding to ()) and the allowable range (± 10%) are taken into consideration. The above-mentioned position of the intermediate drainage pipe (55) is a position determined for draining the stored water above the filter medium (4) where the concentration of suspended matter is particularly high.
【0048】次に、図3に示す濁質除去装置の第1の運
転方法について説明する。原水処理運転と複数回の洗浄
運転とを繰り返し行なう点は前記と同じである。Next, a first operation method of the suspended matter removing apparatus shown in FIG. 3 will be described. The point that the raw water treatment operation and the cleaning operation are repeated a plurality of times is the same as above.
【0049】複数回の洗浄運転は、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うことから成る。そして、洗浄運転
が2回行われる場合は、第1回目の洗浄運転の洗浄水に
は原水を使用し、第2回目の洗浄運転の洗浄水には濁質
除去処理水を使用する。In a plurality of washing operations, the following operations (A) and (B) are performed, and then the same operations (A) and (B) are performed.
Each of the above operations is repeated. When the cleaning operation is performed twice, raw water is used as the cleaning water for the first cleaning operation and turbidity removal treated water is used as the cleaning water for the second cleaning operation.
【0050】(A)塔底部から洗浄水(原水)及び空気
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。具体的な方法は、図1に示す濁質除
去装置の運転方法の場合と同じである。濾材(4)の上
部の貯留水は、次の(B)の操作により、塔側部に具備
された中間抜水管から抜き出される。(A) Washing operation in which wash water (raw water) and air are supplied from the bottom of the tower and discharged from the top of the tower (FIG. 1)
(B)) is performed. The specific method is the same as the case of the operation method of the suspended solid removing apparatus shown in FIG. The stored water in the upper part of the filter medium (4) is extracted from the intermediate drainage pipe provided in the tower side part by the operation of the following (B).
【0051】(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(原水)及び空気の
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。そして、中間抜水
管(55)を具備した好ましい態様の装置の場合は、中
間抜水管(54)よりも先に中間抜水管(55)からの
抜き出しを行なう。斯かる操作により次の様な利益が得
られる。すなわち、中間抜水管(54)から全ての貯留
水を抜き出そうとした場合は、中間抜水管(55)より
上部に存在する高濁質濃度の貯留水が水面低下によって
拡散して塔内が汚染される恐れがある。しかしながら、
中間抜水管(54)よりも先に中間抜水管(55)から
の抜き出しを行なうことにより、上記の問題を解決し得
る。(B) After stopping the supply of washing water (raw water) and air in a state where the lower hanging string (8) and the filter medium (4) extend upward in the tower, the inside of the tower is removed from the intermediate drainage pipe (54). Perform a partial draining process to drain the stored water. Then, in the case of the apparatus of the preferred embodiment equipped with the intermediate drainage pipe (55), the drainage from the intermediate drainage pipe (55) is performed before the intermediate drainage pipe (54). The following benefits can be obtained by such an operation. That is, when it is attempted to extract all of the stored water from the intermediate drainage pipe (54), the stored water with a high turbidity concentration existing above the intermediate drainage pipe (55) diffuses due to the decrease in the water level, and May be contaminated. However,
By extracting from the intermediate drainage pipe (55) before the intermediate drainage pipe (54), the above problem can be solved.
【0052】なお、中間抜水管(55)からの抜き出し
は、下部吊り紐(8)及び濾材(4)が塔内の上方に伸
長した状態(図3(b)参照)から開始する。それに続
く中間抜水管(54)からの抜き出しは、水を含む濾材
(4)が自重により上部支持体(2)から上部吊り紐
(7)の長さ(Lb1)±10%の範囲に相当する距離
分下方に低下した状態(図1(a)参照)で終わる。The withdrawal from the intermediate drainage pipe (55) starts from the state in which the lower suspension string (8) and the filter medium (4) extend upward in the tower (see FIG. 3 (b)). The subsequent extraction from the intermediate drainage pipe (54) corresponds to the range of the length (Lb1) ± 10% of the upper support (2) to the upper suspension string (7) due to the weight of the filter medium (4) containing water due to its own weight. The process ends in a state in which the distance is lowered downward (see FIG. 1A).
【0053】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。通常は3回行われ、第3回目の洗浄運転の洗浄水に
は濁質除去処理水を使用する。The above operations (A) and (B) are not limited to being repeated once but may be repeated a plurality of times as necessary. Usually, it is carried out three times, and the suspended water-removing treated water is used as the washing water in the third washing operation.
【0054】上記の第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、上記の第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、上記の第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 described above is mainly applied when the filter medium (4) itself is not significantly contaminated, and has the advantage of shortening the extraction time of the stored water. 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 described above, since the water is extracted from the intermediate drainage pipe (54) provided on the tower side part as a part of the water removal step, the extraction time of the stored water is significantly shortened. , It is possible to switch to raw water treatment operation early. Further, in the case of the above-mentioned first operating method, since the stored water is only partially extracted, the amount of wash water can be reduced.
【0055】次に、図3に示す濁質除去装置の第2の運
転方法について説明する。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)の各操作を行なう。そし
て、洗浄運転が2回行われる場合は、第1回目の洗浄運
転の洗浄水には原水を使用し、第2回目の洗浄運転の洗
浄水には濁質除去処理水を使用する。Next, the second operation method of the suspended matter removing apparatus shown in FIG. 3 will be described. The second operating method is the same as the first operating method, except that after performing the operations (A) and (B), the operations (A) and (B) are performed again. The following operations (C) to (E) are performed. When the cleaning operation is performed twice, raw water is used as the cleaning water for the first cleaning operation and turbidity removal treated water is used as the cleaning water for the second cleaning operation.
【0056】(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.
【0057】(D)塔底部から洗浄水(濁質除去処理
水)及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(濁質除去処理水)
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 carried out in which washing water (turbid removal treatment water) and air are supplied from the tower bottom and discharged from the tower top. 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 washing water (water for removing suspended matter)
Is supplied from the valve (64) into the tower (1) via the pipe (52). On the other hand, air is the valve (63)
Is supplied into the tower (1) via the pipe (53).
【0058】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、濾材(4)中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、上記の第2の運
転方法は濁質の剥離効果が大きいという特徴を有する。
従って、上記の第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) (cleaning operation) is started from the state where there is no water in the tower (1), in short, washing water and air are not mixed in the filter medium (4) which is not soaked in water. Since the liquid is supplied, the liquid surface rising in the filter medium (4) undulates and violently shakes the filter medium (4) (particularly, the turbidity trapping material projected on the circumferential side of the core string). As a result, the second operation method described above is characterized by a large effect of removing suspended solids.
Therefore, the second operation method described above 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).
【0059】(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(濁質除去処理水)
及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) Washing water (water for removing suspended matter) in a state where the lower hanging string (8) and the filter medium (4) extend upward in the tower.
And after stopping the supply of air, a partial water withdrawal step of withdrawing the stored water in the tower from the intermediate water withdrawal pipe (54) is performed. The operation (E) is performed in the same manner as the operation (B).
【0060】[0060]
【発明の効果】以上説明した本発明によれば、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の運転方
法であって、洗浄運転で使用する洗浄水の一部に原水を
使用することにより、洗浄水のコストダウンを図った濁
質除去装置の運転方法が提供される。よって、本発明の
工業的価値は顕著である。As described above, according to the present invention, it is possible to efficiently capture and discharge suspended matter by the filter medium by the pressure-consolidated state of the filter medium during the raw water treatment operation and the release of the compressed state of the filter medium during the washing operation. A method of operating a turbidity removal device with a structure that is performed, in which raw water is used as part of the wash water used in the cleaning operation to reduce the cost of the wash water. To be done. Therefore, the industrial value of the present invention is remarkable.
【図1】本発明における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 device according to the present invention.
【図2】本発明における濁質除去装置の好ましい他の一
例の模式的説明図FIG. 2 is a schematic explanatory view of another preferred example of the suspended matter removing apparatus according to the present invention.
【図3】本発明における濁質除去装置の好ましい他の一
例の模式的説明図FIG. 3 is a schematic explanatory view of another preferred example of the suspended matter removing apparatus according to 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 55:中間抜水管 51〜53:配管 61〜67: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 55: Intermediate drainage pipe 51-53: Piping 61-67: Valve
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成14年3月5日(2002.3.5)[Submission date] March 5, 2002 (2002.3.5)
【手続補正1】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Name of item to be amended] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【特許請求の範囲】[Claims]
【数1】LA<(Lb1+LB+Lb2) (1)LB<LA (2) (LB+Lb2)<LA<(LB+Lb1) (3)## EQU1 ## LA <(Lb1 + LB + Lb2) (1) LB <LA (2) (LB + Lb2) <LA <(LB + Lb1) (3)
【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’)
(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。## EQU00002 ## 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 ′) (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).
【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’)
(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。## EQU00003 ## 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 ′) (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).
【数4】
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’)
(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。## EQU00004 ## 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 ′) (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).
【数5】
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’)
(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。## EQU00005 ## 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 ′) (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).
【手続補正2】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0005[Name of item to be corrected] 0005
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【0005】[0005]
【数6】LA<(Lb1+LB+Lb2) (1)LB<LA (2) (LB+Lb2)<LA<(LB+Lb1) (3)## EQU6 ## LA <(Lb1 + LB + Lb2) (1) LB <LA (2) (LB + Lb2) <LA <(LB + Lb1) (3)
【手続補正3】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0015[Name of item to be corrected] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【0015】[0015]
【数7】LA<(Lb1+LB+Lb2) (1)LB<LA (2) (LB+Lb2)<LA<(LB+Lb1) (3)## EQU00007 ## LA <(Lb1 + LB + Lb2) (1) LB <LA (2) (LB + Lb2) <LA <(LB + Lb1) (3)
【手続補正4】[Procedure amendment 4]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0021[Correction target item name] 0021
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【0021】[0021]
【数8】 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 8 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 x (LB + Lb1) (3 ')
───────────────────────────────────────────────────── 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 580H ─────────────────────────────────────────────────── ─── Continued Front Page (51) Int.Cl. 7 Identification Code FI Theme Coat (Reference) B01D 29/38 580H
Claims (5)
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であって且つ原水タンクに連
結された原水供給配管とバルブ付の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
する濁質除去装置(A)の運転方法であって、原水処理
運転と複数回の洗浄運転とを繰り返し行なうことから成
り、少なくとも最終回の洗浄運転の洗浄水には濁質除去
処理水を使用し、その前の少なくとも一部の洗浄運転の
洗浄水には原水を使用することを特徴とする濁質除去装
置の運転方法。 【数1】 (Lb1+LB+Lb2)<LA (1) LA<LB (2) (LB+Lb2)<LA<(LB+Lb1) (3)1. 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, wherein a tower (1) has a valve at the top and a raw water tank. Is provided with a raw water supply pipe and a washing wastewater discharge pipe with a valve, 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, and a core cord and a protrusion on the circumferential side of the core cord are provided between the upper support (2) and the lower support (3). A plurality of filter media (4) made of suspended suspended material are fixed in a suspended state by an upper suspension string (7) and a lower suspension string (8) at the ends of the filter medium, and a core string of the filter medium (4). Also, the upper suspension cord (7) and the lower suspension cord (8) are configured to be bendable and deformable along the flowing direction of water, and the upper support (2). Between the lower support (3) and the lower support (3), the length of the filter medium (4) (LB), the length of the upper hanging string (7) (Lb1), the length of the lower hanging string (8) ( L
b2) is a method of operating the turbidity removal apparatus (A) satisfying the following equations (1) to (3), which comprises performing a raw water treatment operation and a plurality of washing operations repeatedly. The operation of the turbidity removal device is characterized in that turbidity removal treated water is used for at least the final washing operation, and raw water is used for at least part of the previous washing operation. Method. ## EQU1 ## (Lb1 + LB + Lb2) <LA (1) LA <LB (2) (LB + Lb2) <LA <(LB + Lb1) (3)
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)が具備された濁質除去
装置を使用し、複数回の洗浄運転が次の(A)及び
(B)の各操作を行なった後に同(A)及び(B)の各
操作を再度行なうことから成る請求項1に記載の運転方
法。 【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’) (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. Excluding the range corresponding to the length (Lb1) of the upper support (2) from the upper support (2), which satisfies the formulas (1 ′) to (3 ′) defined below. On the tower side of the region between the upper support (2) and the lower support (3) and excluding the ranges corresponding to 10% of the height of the region from the upper end and the lower end of the region, respectively. Uses a turbidity removal device equipped with an intermediate drainage pipe (54) with a valve (66), and the same (A) is used after a plurality of washing operations have been performed in each of the following operations (A) and (B). ) And (B) are performed again, The operating method according to claim 1. ## EQU00002 ## 1.01 × LA <(Lb1 + LB + Lb2) <2.00 × LA (1 ′) 1.01 × LB <LA <1.50 × LB (2 ′) 1.01 (LB + Lb2) <LA <1 0.01 (LB + Lb1) (3 ′) (A) Washing operation in which washing water and air are supplied from the tower bottom and discharged from the tower top. (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).
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)が具備された濁質除去
装置を使用し、複数回の洗浄運転が次の(A)及び
(B)の各操作を行なった後に次の(C)〜(E)の各
操作を行なうことから成る請求項1に記載の運転方法。 【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’) (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. Excluding the range corresponding to the length (Lb1) of the upper support (2) from the upper support (2), which satisfies the formulas (1 ′) to (3 ′) defined below. On the tower side of the region between the upper support (2) and the lower support (3) and excluding the regions corresponding to 10% of the height of the region from the upper end and the lower end of the region, respectively. Uses a turbidity removal device equipped with an intermediate drainage pipe (54) equipped with a valve (66), and after performing a plurality of washing operations each of the following operations (A) and (B), The operating method according to claim 1, which comprises performing each of the operations C) to (E). ## EQU00003 ## 1.01 × LA <(Lb1 + LB + Lb2) <2.00 × LA (1 ′) 1.01 × LB <LA <1.50 × LB (2 ′) 1.01 (LB + Lb2) <LA <1 0.01 (LB + Lb1) (3 ′) (A) Washing operation in which washing water and air are supplied from the tower bottom and discharged from the tower top. (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).
満足し、そして、上部支持体(2)から上部吊り紐
(7)の長さ(Lb1)±10%の範囲に相当する距離
分下方の塔側部にはバルブ(66)付の中間抜水管(5
4)が具備された濁質除去装置を使用し、複数回の洗浄
運転が次の(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うことから
成る請求項1に記載の運転方法。 【数4】 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’) (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。4. The formulas (1 ′) to (3 ′) defined below are satisfied, and the length (Lb1) of the upper suspension string (7) from the upper support (2) is within a range of ± 10%. An intermediate drainage pipe (5) with a valve (66) is installed on the side of the tower below the corresponding distance.
4) is used, and the washing operation is performed a plurality of times for each of the following operations (A) and (B), and then each operation (A) and (B) is performed again. The method of operation according to claim 1, comprising performing the operation. ## EQU00004 ## 1.01 × LA <(Lb1 + LB + Lb2) <2.00 × LA (1 ′) 1.01 × LB <LA <1.50 × LB (2 ′) 1.01 (LB + Lb2) <LA <1 0.01 (LB + Lb1) (3 ′) (A) Washing operation in which washing water and air are supplied from the tower bottom and discharged from the tower top. (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).
満足し、そして、上部支持体(2)から上部吊り紐
(7)の長さ(Lb1)±10%の範囲に相当する距離
分下方の塔側部にはバルブ(66)付の中間抜水管(5
4)が具備された濁質除去装置を使用し、複数回の洗浄
運転が次の(A)及び(B)の各操作を行なった後に次
の(C)〜(E)の各操作を行なうことから成る請求項
1に記載の運転方法。 【数5】 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’) (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。5. The formulas (1 ′) to (3 ′) defined below are satisfied, and the length (Lb1) of the upper suspension string (7) from the upper support (2) is within a range of ± 10%. An intermediate drainage pipe (5) with a valve (66) is installed on the side of the tower below the corresponding distance.
4) is used, the washing operation is performed a plurality of times, and then each of the following operations (A) and (B) is performed, and then each of the following operations (C) to (E) is performed. The operating method according to claim 1, which comprises: ## EQU00005 ## 1.01 × LA <(Lb1 + LB + Lb2) <2.00 × LA (1 ′) 1.01 × LB <LA <1.50 × LB (2 ′) 1.01 (LB + Lb2) <LA <1 0.01 (LB + Lb1) (3 ′) (A) Washing operation in which washing water and air are supplied from the tower bottom and discharged from the tower top. (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)
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JP2001247221A JP4649798B2 (en) | 2001-08-16 | 2001-08-16 | Operation method of turbidity removal device |
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JP2001247221A JP4649798B2 (en) | 2001-08-16 | 2001-08-16 | Operation method of turbidity removal device |
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JP4649798B2 JP4649798B2 (en) | 2011-03-16 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007021361A (en) * | 2005-07-15 | 2007-02-01 | Kawamoto Pump Mfg Co Ltd | Water purifier |
JP2011011125A (en) * | 2009-06-30 | 2011-01-20 | Hymo Corp | Water treatment method |
CN102824766A (en) * | 2011-06-16 | 2012-12-19 | 株式会社东开美 | Filtering device |
JP2016107210A (en) * | 2014-12-05 | 2016-06-20 | 三浦工業株式会社 | Back washing method for filtering device, and filtering device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0411906A (en) * | 1990-04-27 | 1992-01-16 | Noritz Corp | Filter |
JPH07299309A (en) * | 1994-05-09 | 1995-11-14 | Doboku Kenkyu Center | Filter apparatus |
JPH1119421A (en) * | 1997-07-07 | 1999-01-26 | Kurita Water Ind Ltd | Method of backwashing filter |
-
2001
- 2001-08-16 JP JP2001247221A patent/JP4649798B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0411906A (en) * | 1990-04-27 | 1992-01-16 | Noritz Corp | Filter |
JPH07299309A (en) * | 1994-05-09 | 1995-11-14 | Doboku Kenkyu Center | Filter apparatus |
JPH1119421A (en) * | 1997-07-07 | 1999-01-26 | Kurita Water Ind Ltd | Method of backwashing filter |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007021361A (en) * | 2005-07-15 | 2007-02-01 | Kawamoto Pump Mfg Co Ltd | Water purifier |
JP2011011125A (en) * | 2009-06-30 | 2011-01-20 | Hymo Corp | Water treatment method |
CN102824766A (en) * | 2011-06-16 | 2012-12-19 | 株式会社东开美 | Filtering device |
JP2016107210A (en) * | 2014-12-05 | 2016-06-20 | 三浦工業株式会社 | Back washing method for filtering device, and filtering device |
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