JP2006212536A - Apparatus for injecting lime water - Google Patents

Apparatus for injecting lime water Download PDF

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JP2006212536A
JP2006212536A JP2005027505A JP2005027505A JP2006212536A JP 2006212536 A JP2006212536 A JP 2006212536A JP 2005027505 A JP2005027505 A JP 2005027505A JP 2005027505 A JP2005027505 A JP 2005027505A JP 2006212536 A JP2006212536 A JP 2006212536A
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filtration membrane
water
slurry
membrane module
lime
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Hiroyuki Furuya
弘幸 古屋
Seiichi Suehiro
誠一 末廣
Minoru Nomura
実 野村
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Suido Kiko Kaisha Ltd
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Suido Kiko Kaisha Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for injecting lime water, by which the load imposed on the work of liquid chemical cleaning can be reduced and which can be operated continuously for a long time. <P>SOLUTION: A plurality of casing-housed filtration membrane modules (5, 6) to be communicated with/isolated from a slurry tank (3) are used. When each of them is operated, it is communicated with the slurry tank and when it is cleaned by a liquid chemical, it is isolated from the slurry tank. In other words, at least one of filtration membrane modules (5, 6) is operated for filtering slurry (L) continuously and remaining filtration membrane modules are backwashed. Since the work of replacing the slurry in the slurry tank (3) with the liquid chemical (A) or isolating each of filtration membrane modules (5, 6) from the slurry tank (3) is not necessary, the load imposed on the work of liquid chemical cleaning can be reduced. Since some of filtration membrane modules are operated continuously even when other of them are backwashed, the apparatus for injecting limewater can be operated continuously for a long time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、石灰水注入装置に関し、さらに詳しくは、薬液洗浄の作業負担が軽くて済むと共に長時間の連続運転が可能な石灰水注入装置に関する。   The present invention relates to a lime water injecting device, and more particularly to a lime water injecting device that can reduce the work load of chemical cleaning and can be operated continuously for a long time.

従来の石灰水注入装置として、スラリー槽に貯留した消石灰のスラリー中に浸漬タイプのろ過膜モジュールを浸漬し、ろ過膜モジュールの二次側からポンプで吸引し、二次側にろ過されてきた石灰水を所望の注入場所に注入する技術が知られている(特許文献1照)。   As a conventional lime water injecting device, a lime lime that has been immersed in a slaked lime slurry stored in a slurry tank, sucked with a pump from the secondary side of the filtration membrane module, and filtered to the secondary side A technique for injecting water into a desired injection site is known (see Patent Document 1).

特公平7−90210号公報Japanese Patent Publication No. 7-90210

従来の石灰水注入装置では、ろ過膜の目詰まりによって吸引圧が設定値まで上がった時点で運転を止め、ろ過膜モジュールを逆洗している(特公平7−90210号公報[0034])。
しかし、逆洗で十分に回復しない場合には薬液洗浄が必要になるが、そのためにはスラリー槽内のスラリーを薬液に入れ替えるか若しくはろ過膜モジュールをスラリー槽から引き上げる必要があり、作業負担が重くなる問題点があった。また、消石灰は大気から水に溶解した炭酸と反応して炭酸カルシウムを生じさせるためにろ過膜の目詰まりが起こりやすく、短時間毎に逆洗のために運転を止めなければならない問題点があった。
そこで、本発明の目的は、薬液洗浄の作業負担が軽くて済むと共に長時間の連続運転が可能な石灰水注入装置を提供することにある。
In the conventional lime water injection device, the operation is stopped when the suction pressure rises to the set value due to clogging of the filtration membrane, and the filtration membrane module is backwashed (Japanese Patent Publication No. 7-90210 [0034]).
However, chemical cleaning is required when the backwashing does not sufficiently recover, but for this purpose, it is necessary to replace the slurry in the slurry tank with the chemical liquid or to lift the filtration membrane module from the slurry tank, and the work load is heavy. There was a problem. In addition, slaked lime reacts with carbonic acid dissolved in water from the atmosphere to produce calcium carbonate, which easily clogs the filtration membrane, and there is a problem that the operation must be stopped for backwashing every short time. It was.
SUMMARY OF THE INVENTION An object of the present invention is to provide a lime water injecting apparatus that can reduce the work load of chemical cleaning and can be operated continuously for a long time.

第1の観点では、本発明は、消石灰のスラリーを貯留するスラリー槽(3)と、ケーシング収納タイプのろ過膜モジュール(5,6)と、前記スラリー槽(3)から前記ろ過膜モジュール(5,6)へ前記スラリー(L)を送給するための流路手段と、前記流路手段を連通するか遮断するかを切り替える連通/遮断手段(V1,V2)と、前記流路手段を連通した状態で前記スラリー槽から前記ろ過膜モジュールの一次側へ前記スラリーを送り込むスラリー送給手段(4)とを具備したことを特徴とする石灰水注入装置(100)を提供する。
上記第1の観点による石灰水注入装置(100)では、スラリー槽(3)との連通/遮断が可能なケーシング収納タイプのろ過膜モジュール(5,6)を用いるから、運転時は連通させておき、薬液洗浄時は遮断することで、スラリー槽(3)内のスラリーを薬液(A)に入れ替えたり,ろ過膜モジュール(5,6)をスラリー槽(3)から引き上げる手間がかからず、薬液洗浄の作業負担が軽くて済む。
In a first aspect, the present invention relates to a slurry tank (3) for storing slaked lime slurry, a casing storage type filtration membrane module (5, 6), and the slurry membrane (3) to the filtration membrane module (5). , 6), the flow path means for feeding the slurry (L), the communication / blocking means (V1, V2) for switching the flow path means to be communicated or blocked, and the flow path means are communicated with each other. A lime water injecting device (100) is provided, comprising a slurry feeding means (4) for feeding the slurry from the slurry tank to the primary side of the filtration membrane module in a state of being made.
In the lime water injection device (100) according to the first aspect, since the casing storage type filtration membrane module (5, 6) capable of communicating / blocking with the slurry tank (3) is used, it is communicated during operation. It is not necessary to replace the slurry in the slurry tank (3) with the chemical liquid (A) or pull the filtration membrane module (5, 6) from the slurry tank (3) The work load of chemical cleaning is light.

第2の観点では、本発明は、上記第1の観点による石灰水注入装置(100)において、前記流路手段を遮断した状態で前記ろ過膜モジュール(5,6)の一次側へ薬液(A)を送り込む薬液送給手段(12,13)を具備したことを特徴とする石灰水注入装置(100)を提供する。
上記第2の観点による石灰水注入装置(100)では、ろ過膜モジュール(5,6)を移動させずに薬液洗浄が可能となり、薬液洗浄の作業負担がさらに軽くて済む。
In a second aspect, the present invention provides a lime water injection device (100) according to the first aspect, wherein a chemical (A) is fed to the primary side of the filtration membrane module (5, 6) in a state where the flow path means is blocked. The lime water injecting device (100) is provided with a chemical solution feeding means (12, 13).
In the lime water injection device (100) according to the second aspect, the chemical cleaning can be performed without moving the filtration membrane module (5, 6), and the work load of the chemical cleaning can be further reduced.

第3の観点では、本発明は、上記第2の観点による石灰水注入装置において、前記流路手段を遮断した状態で前記ろ過膜モジュール(5,6)の二次側へ逆洗用水(T)を送り込む逆洗用水送給手段(8,9)を具備したことを特徴とする石灰水注入装置(100)を提供する。
上記第3の観点による石灰水注入装置(100)では、ろ過膜モジュール(5,6)を移動させずに逆洗も可能となる。
In a third aspect, the present invention provides the limewater injection apparatus according to the second aspect, wherein backwash water (T) is supplied to the secondary side of the filtration membrane module (5, 6) in a state where the flow path means is shut off. A lime water injection device (100) characterized by comprising water supply means (8, 9) for backwashing that feeds back water.
In the lime water injection device (100) according to the third aspect, backwashing is possible without moving the filtration membrane module (5, 6).

第4の観点では、本発明は、上記第1または第2の観点による石灰水注入装置(100)において、複数台の前記ケーシング収納タイプのろ過膜モジュール(5,6)と、それらに対応する複数の前記流路手段および前記連通/遮断手段(V1,V2)と、前記流路手段の一部を連通状態としたまま残りの一部または全部を遮断状態とする連通・遮断並行化手段(20)と、前記遮断状態とした前記ろ過膜モジュールの二次側へ逆洗用水を送り込む逆洗用水送給手段(8,9)とを具備したことを特徴とする石灰水注入装置(100)を提供する。
上記第4の観点による石灰水注入装置(100)では、複数台のろ過膜モジュール(5,6)を用い、少なくとも1台の運転ろ過膜モジュールでスラリー(L)のろ過を継続しながら、残りのろ過膜モジュールを逆洗することが出来る。よって、長時間の連続運転が可能となる。なお、全ろ過膜モジュールをろ過に供する期間があってもよい(この期間中は逆洗するろ過膜モジュールは存在しないことになる)。
In a fourth aspect, the present invention relates to a plurality of casing housing type filtration membrane modules (5, 6) in the limewater injection device (100) according to the first or second aspect, and corresponds to them. A plurality of the flow path means and the communication / blocking means (V1, V2), and communication / blocking parallel means for blocking the remaining part or all of the flow path means while keeping a part of the flow path means in communication ( 20) and backwashing water feeding means (8, 9) for feeding backwashing water to the secondary side of the filtration membrane module in the shut-off state. I will provide a.
In the lime water injection device (100) according to the fourth aspect, a plurality of filtration membrane modules (5, 6) are used, and while the filtration of the slurry (L) is continued with at least one operation filtration membrane module, the remaining The filtration membrane module can be backwashed. Therefore, continuous operation for a long time is possible. There may be a period during which the entire filtration membrane module is subjected to filtration (there is no filtration membrane module to be backwashed during this period).

第5の観点では、本発明は、上記第3または第4の観点による石灰水注入装置(100)において、前記逆洗用水(T)の透過により前記ろ過膜モジュール(5,6)の一次側に生じた水を前記スラリー槽(3)へ補給する水補給手段(11)を具備したことを特徴とする石灰水注入装置(100)を提供する。
上記第5の観点による石灰水注入装置(100)では、ろ過膜モジュール(5,6)の逆流洗浄とスラリー槽(3)への水補給とを兼ね合わせることにより効率的な運転が可能となる。また、逆洗により回収された消石灰を水と共にスラリー槽(3)に戻すことで消石灰および水を無駄なく利用することが出来る。
In a fifth aspect, the present invention relates to the primary side of the filtration membrane module (5, 6) by the permeation of the backwash water (T) in the lime water injection device (100) according to the third or fourth aspect. A lime water injection device (100) is provided, comprising water supply means (11) for supplying water generated in the slurry tank (3) to the slurry tank (3).
In the lime water injection device (100) according to the fifth aspect, efficient operation is possible by combining backwashing of the filtration membrane module (5, 6) and water supply to the slurry tank (3). . Moreover, slaked lime and water can be utilized without waste by returning the slaked lime recovered by backwashing to the slurry tank (3) together with water.

本発明の石灰水注入装置によれば、固形物を含まない石灰水を長時間連続的に注入することが出来る。また、薬液洗浄の作業負担が軽くて済む。   According to the lime water injection device of the present invention, lime water not containing solid matter can be continuously injected for a long time. In addition, the work load of the chemical cleaning can be reduced.

以下、図に示す実施例により本発明をさらに詳細に説明する。なお、これにより本発明が限定されるものではない。   Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. Note that the present invention is not limited thereby.

図1は、実施例1に係る石灰水注入装置100を示す構成図である。
この石灰水注入装置100において、1は消石灰を貯留するための消石灰槽、3は消石灰槽1から消石灰注入装置2により補給された消石灰と水とを攪拌しスラリーLを調整し貯留するためのスラリー槽、5および6はスラリー槽3からスラリー供給ポンプ4により供給された消石灰のスラリーLから固形物を含まない石灰水Wをろ過分離するためのケーシング収納タイプのろ過膜モジュール、7は所望の注入場所へ注入する石灰水Wの流量を制御するための流量調節装置、8は浄水Tを貯留するための浄水槽、9は浄水槽8からろ過膜モジュール5,6の二次側へ逆洗用の浄水Tを供給するための水供給ポンプ、10はろ過膜モジュール5,6の一次側へエアスクラビング用の空気を供給するためのエアコンプレッサ、11は逆洗時にろ過膜モジュール5,6の一次側に透過した水をスラリー槽3へ補給するための水補給路、12は薬液Aを貯留するための薬液槽、13は薬液槽12からろ過膜モジュール5,6の一次側へ薬液洗浄用の薬液Aを供給するための薬液供給ポンプである。
FIG. 1 is a configuration diagram illustrating a limewater injection device 100 according to the first embodiment.
In this lime water injection apparatus 100, 1 is a slaked lime tank for storing slaked lime, 3 is a slurry for adjusting and storing slurry L by stirring the slaked lime and water replenished from the slaked lime tank 1 by the slaked lime injection apparatus 2. Tanks 5 and 6 are casing storage type filtration membrane modules for filtering and separating lime water W not containing solid matter from slaked lime slurry L supplied from slurry tank 3 by slurry supply pump 4, and 7 is a desired injection A flow control device for controlling the flow rate of the lime water W to be injected into the place, 8 is a water purification tank for storing the purified water T, and 9 is for backwashing from the water purification tank 8 to the secondary side of the filtration membrane modules 5 and 6. A water supply pump for supplying the purified water T of the water, 10 is an air compressor for supplying air for scrubbing to the primary side of the filtration membrane modules 5 and 6, and 11 is a filter for backwashing. A water replenishment path for replenishing the water permeated to the primary side of the modules 5 and 6 to the slurry tank 3, 12 is a chemical liquid tank for storing the chemical liquid A, and 13 is the primary of the filtration membrane modules 5 and 6 from the chemical liquid tank 12. This is a chemical solution supply pump for supplying the chemical solution A for cleaning the chemical solution to the side.

また、V1,V2はスラリーLの流路を切り替えるためのバルブ、V3,V4は石灰水Wの流路を切り替えるためのバルブ、V5,V6は空気の流路を切り替えるためのバルブ、V7,V8は補給する水の流路を切り替えるためのバルブ、V9,V10は浄水Tの流路を切り替えるためのバルブ、V11,V12は薬液Aの流路を切り替えるためのバルブ、V13,V14は排液バルブ、V15,V16はエアバルブ、V18,V19は逆洗時にろ過膜モジュール5,6の一次側に透過した水の流路を切り替えるためのバルブである。   V1, V2 are valves for switching the flow path of the slurry L, V3, V4 are valves for switching the flow path of the lime water W, V5, V6 are valves for switching the flow path of the air, V7, V8 Is a valve for switching the flow path of the water to be replenished, V9 and V10 are valves for switching the flow path of the purified water T, V11 and V12 are valves for switching the flow path of the chemical solution A, and V13 and V14 are drainage valves. V15 and V16 are air valves, and V18 and V19 are valves for switching the flow path of the water that has permeated to the primary side of the filtration membrane modules 5 and 6 during backwashing.

また、20は消石灰注入装置2,スラリー供給ポンプ4,流量調節装置7,水供給ポンプ9,コンプレッサ10,薬液供給ポンプ13およびバルブV1〜V14の動作を制御する制御装置であり、石灰水注入装置100の自動運転が可能である。   Reference numeral 20 denotes a control device for controlling operations of the slaked lime injection device 2, slurry supply pump 4, flow rate adjustment device 7, water supply pump 9, compressor 10, chemical solution supply pump 13 and valves V1 to V14. 100 automatic operations are possible.

なお、所望の注入場所とは、例えば浄水処理施設においてpH調整やアルカリ度調整のために原水あるいは浄水に石灰水を注入する場所である。   In addition, a desired injection | pouring place is a place which inject | pours lime water into raw | natural water or purified water for pH adjustment and alkalinity adjustment, for example in a water purification treatment plant | facility.

消石灰注入装置2は、消石灰を定量注入可能な機能を有する装置であり、粉体注入ポンプ,粉体供給機,空気輸送装置などである。   The slaked lime injection device 2 is a device having a function capable of quantitatively injecting slaked lime, such as a powder injection pump, a powder supply machine, and an air transportation device.

ろ過膜モジュール5,6には、スラリーLの固形物を除去することができる孔径であればUF膜,MF膜のどちらでもよい。ただし、耐薬品性を有する材質を使用する。これは、スラリーLおよび石灰水Wは強いアルカリ性であり、さらに薬液Aは強い酸性であるためである。   The filtration membrane modules 5 and 6 may be either a UF membrane or an MF membrane as long as the pore diameter can remove the solid matter of the slurry L. However, use chemical resistant materials. This is because the slurry L and the lime water W are strongly alkaline, and the chemical solution A is strongly acidic.

次に、動作を説明する。
(0)消石灰注入装置2を作動させて、消石灰槽1からスラリー槽3へ消石灰を供給する。また、バルブV7〜V10およびV19を開状態にし、他のバルブを閉状態にし、水供給ポンプ9を作動させて、浄水槽8からろ過膜モジュール5,6の二次側へ浄水Tを供給すると共に一次側に透過した水をスラリー槽3へ供給する。そして、スラリー槽3で消石灰と水とを攪拌し、消石灰のスラリーLを調整する。
Next, the operation will be described.
(0) The slaked lime injection device 2 is operated to supply slaked lime from the slaked lime tank 1 to the slurry tank 3. Further, the valves V7 to V10 and V19 are opened, the other valves are closed, the water supply pump 9 is operated, and the purified water T is supplied from the purified water tank 8 to the secondary side of the filtration membrane modules 5 and 6. At the same time, water that has permeated to the primary side is supplied to the slurry tank 3. And the slaked lime and water are stirred in the slurry tank 3, and the slurry L of slaked lime is adjusted.

(1)バルブV1,V3,V8,V10,V19を開状態にし、他のバルブを閉状態にし、スラリー供給ポンプ4および水供給ポンプ9を作動させる。スラリーLは、スラリー供給ポンプ4によりろ過膜モジュール5の一次側へ供給され、スラリーLに含まれる固形物はろ過膜モジュール5により分離され、ろ過膜モジュール5の二次側に固形物を含まない石灰水Wが得られる。流量調節装置7は、一定量の石灰水Wを所望の注入場所に供給する。他方、浄水Tは、水供給ポンプ9によりろ過膜モジュール6の二次側へ供給され、一時側へ透過した水がスラリー槽3に補給される。これを例えば15分間継続する。 (1) The valves V1, V3, V8, V10, V19 are opened, the other valves are closed, and the slurry supply pump 4 and the water supply pump 9 are operated. The slurry L is supplied to the primary side of the filtration membrane module 5 by the slurry supply pump 4, the solid matter contained in the slurry L is separated by the filtration membrane module 5, and no solid matter is contained on the secondary side of the filtration membrane module 5. Lime water W is obtained. The flow control device 7 supplies a certain amount of lime water W to a desired injection location. On the other hand, the purified water T is supplied to the secondary side of the filtration membrane module 6 by the water supply pump 9, and the water that has permeated to the temporary side is replenished to the slurry tank 3. This is continued for 15 minutes, for example.

(2)バルブV2,V4,V5,V7,V9,V19を開状態にし、他のバルブを閉状態にし、スラリー供給ポンプ4,水供給ポンプ9およびコンプレッサ10を作動させる。スラリーLは、スラリー供給ポンプ4によりろ過膜モジュール6の一次側へ供給され、スラリーLに含まれる固形物はろ過膜モジュール6により分離され、ろ過膜モジュール6の二次側に固形物を含まない石灰水Wが得られる。流量調節装置7は、一定量の石灰水Wを所望の注入場所に供給する。他方、浄水Tは、水供給ポンプ9によりろ過膜モジュール5の二次側へ供給され、ろ過膜モジュール5のろ過膜を逆洗する。同時に空気によりろ過膜モジュール5の一次側がエアスクラビングされる。例えば最初の1分間でコンプレッサ10を停止させ、バルブV5を閉状態にする。ろ過膜モジュール5のろ過膜から逆洗およびエアスクラビングにより剥離した固形物およびろ過膜モジュール5の一次側へ透過した水はスラリー槽3に戻される。これを例えば15分間継続する。 (2) The valves V2, V4, V5, V7, V9, and V19 are opened, the other valves are closed, and the slurry supply pump 4, the water supply pump 9, and the compressor 10 are operated. The slurry L is supplied to the primary side of the filtration membrane module 6 by the slurry supply pump 4, the solid matter contained in the slurry L is separated by the filtration membrane module 6, and no solid matter is contained on the secondary side of the filtration membrane module 6. Lime water W is obtained. The flow control device 7 supplies a certain amount of lime water W to a desired injection location. On the other hand, the purified water T is supplied to the secondary side of the filtration membrane module 5 by the water supply pump 9 and backwashes the filtration membrane of the filtration membrane module 5. At the same time, the primary side of the filtration membrane module 5 is air scrubbed by air. For example, the compressor 10 is stopped in the first minute, and the valve V5 is closed. The solid matter peeled from the filtration membrane of the filtration membrane module 5 by backwashing and air scrubbing and the water that has permeated to the primary side of the filtration membrane module 5 are returned to the slurry tank 3. This is continued for 15 minutes, for example.

(3)バルブV1,V3,V6,V8,V10,V19を開状態にし、他のバルブを閉状態にし、スラリー供給ポンプ4,水供給ポンプ9およびコンプレッサ10を作動させる。スラリーLは、スラリー供給ポンプ4によりろ過膜モジュール5の一次側へ供給され、スラリーLに含まれる固形物はろ過膜モジュール5により分離され、ろ過膜モジュール5の二次側に固形物を含まない石灰水Wが得られる。流量調節装置7は、一定量の石灰水Wを所望の注入場所に供給する。他方、浄水Tは、水供給ポンプ9によりろ過膜モジュール6の二次側へ供給され、ろ過膜モジュール6のろ過膜を逆洗する。同時に空気によりろ過膜モジュール6の一次側がエアスクラビングされる。例えば最初の1分間でコンプレッサ10を停止させ、バルブV6を閉状態にする。ろ過膜モジュール6のろ過膜から逆洗およびエアスクラビングにより剥離した固形物およびろ過膜モジュール6の一次側へ透過した水はスラリー槽3に戻される。これを例えば15分間継続する。 (3) The valves V1, V3, V6, V8, V10, V19 are opened, the other valves are closed, and the slurry supply pump 4, the water supply pump 9 and the compressor 10 are operated. The slurry L is supplied to the primary side of the filtration membrane module 5 by the slurry supply pump 4, the solid matter contained in the slurry L is separated by the filtration membrane module 5, and no solid matter is contained on the secondary side of the filtration membrane module 5. Lime water W is obtained. The flow control device 7 supplies a certain amount of lime water W to a desired injection location. On the other hand, the purified water T is supplied to the secondary side of the filtration membrane module 6 by the water supply pump 9 and backwashes the filtration membrane of the filtration membrane module 6. At the same time, the primary side of the filtration membrane module 6 is air scrubbed by air. For example, the compressor 10 is stopped in the first minute, and the valve V6 is closed. The solid matter peeled from the filtration membrane of the filtration membrane module 6 by backwashing and air scrubbing and the water that has permeated to the primary side of the filtration membrane module 6 are returned to the slurry tank 3. This is continued for 15 minutes, for example.

なお、スラリー槽3に水位センサ(図示省略)を設置し、スラリー槽3内の水位が一定の範囲より下がった際には水供給ポンプ9の出力を上げ、スラリー槽3内の水位が一定の範囲より上がった際には水供給ポンプ9の出力を下げるように制御した。   A water level sensor (not shown) is installed in the slurry tank 3, and when the water level in the slurry tank 3 falls below a certain range, the output of the water supply pump 9 is increased so that the water level in the slurry tank 3 is constant. When it exceeded the range, the output of the water supply pump 9 was controlled to decrease.

(4)上記の(2)(3)の工程を交互に例えば1ヶ月継続すると、スラリー供給ポンプ4および水供給ポンプ9を停止し、バルブV13〜V16を開状態にし、他のバルブを閉状態にし、ろ過膜モジュール5,6の一次側の排液を行う。次いで、バルブV13,V14を閉状態にし、薬液供給ポンプ13を作動させて、ろ過膜モジュール5,6の一次側に薬液Aを供給し、薬液洗浄を行う。次いで、薬液供給ポンプ13を停止させ、バルブV13,V14を開状態にし、ろ過膜モジュール5,6の一次側の薬液Aを排液する。次いで、バルブV9,V10を開状態にし、水供給ポンプ9を作動させて、ろ過膜モジュール5,6のろ過膜を逆洗し、ろ過膜モジュール5,6の一次側へ透過した水で薬液を洗い流す。そして、全てのバルブを閉状態とし、上記(1)の工程へ戻る。 (4) When the above steps (2) and (3) are alternately continued for one month, for example, the slurry supply pump 4 and the water supply pump 9 are stopped, the valves V13 to V16 are opened, and the other valves are closed. And draining the primary side of the filtration membrane modules 5 and 6. Next, the valves V13 and V14 are closed, the chemical solution supply pump 13 is operated, the chemical solution A is supplied to the primary side of the filtration membrane modules 5 and 6, and the chemical solution is cleaned. Next, the chemical solution supply pump 13 is stopped, the valves V13 and V14 are opened, and the chemical solution A on the primary side of the filtration membrane modules 5 and 6 is discharged. Next, the valves V9 and V10 are opened, the water supply pump 9 is operated, the filtration membranes of the filtration membrane modules 5 and 6 are back-washed, and the chemical solution is supplied with water that has permeated to the primary side of the filtration membrane modules 5 and 6. Wash away. Then, all the valves are closed, and the process returns to the above step (1).

(5)消石灰注入装置2の運転にともなってスラリーL中に含まれる消石灰以外の固形物の濃度が高くなった場合は、上記の(2)または(3)の工程におけるろ過モジュール5または6の逆洗動作の最初の例えば1分間はバルブV19を閉じバルブV18を開いて、ろ過モジュール5または6の一次側の水をスラリー槽3へ戻さずに排出する。その後は、バルブV18を閉じバルブV19を開いて、ろ過モジュール5または6の一次側の水をスラリー槽3へ戻す。これを定期的に実施することにより、運転(石灰水Wの注入)を止めずに、スラリーL中に含まれる消石灰以外の固形物の引き出しが可能になる。 (5) When the concentration of solids other than the slaked lime contained in the slurry L is increased with the operation of the slaked lime injection device 2, the filtration module 5 or 6 in the process (2) or (3) described above For example, for the first minute of the backwashing operation, the valve V19 is closed and the valve V18 is opened, and the water on the primary side of the filtration module 5 or 6 is discharged without returning to the slurry tank 3. Thereafter, the valve V18 is closed and the valve V19 is opened, and the water on the primary side of the filtration module 5 or 6 is returned to the slurry tank 3. By carrying out this regularly, it is possible to draw out solids other than slaked lime contained in the slurry L without stopping the operation (injection of lime water W).

−評価試験−
MF膜のろ過膜モジュール5,6を用いて、15分毎に上記(2)(3)の工程を交互に実施した。
図2に、ろ過膜の25℃温度補正膜差圧、石灰水WのpHおよびSS(固形物含有量)の経時変化を示す。なお、膜差圧aはろ過膜モジュール5の膜差圧、膜差圧bはろ過膜モジュール6の膜差圧である。
この結果から、pHが13程度,SSが0mg/リットルの安定した品質の石灰水Wを継続的に供給できることが確認された。また、ろ過膜の膜差圧も急激な上昇は認められず、実用運転が可能であることが確認された。
-Evaluation test-
Using the filtration membrane modules 5 and 6 of the MF membrane, the steps (2) and (3) were alternately performed every 15 minutes.
In FIG. 2, the time-dependent change of the 25 degreeC temperature correction film | membrane differential pressure | voltage of a filtration membrane, pH of lime water W, and SS (solid matter content) is shown. The membrane differential pressure a is the membrane differential pressure of the filtration membrane module 5, and the membrane differential pressure b is the membrane differential pressure of the filtration membrane module 6.
From this result, it was confirmed that stable quality lime water W having a pH of about 13 and an SS of 0 mg / liter can be continuously supplied. Moreover, the membrane pressure difference of the filtration membrane did not increase rapidly, and it was confirmed that practical operation was possible.

図3は、実施例2に係る石灰水注入装置200を示す構成図である。
この石灰水注入装置200は、実施例1の石灰水注入装置100の構成に、浄水Tをスラリー槽3に直接的に供給するための水補給路14およびバルブV17を追加した構成である。
水補給路14およびバルブV17を追加することにより、次の(a)(b)の動作も実施可能となる。
FIG. 3 is a configuration diagram illustrating the limewater injection device 200 according to the second embodiment.
The lime water injection device 200 is configured by adding a water supply path 14 and a valve V17 for supplying purified water T directly to the slurry tank 3 to the configuration of the lime water injection device 100 of the first embodiment.
By adding the water supply path 14 and the valve V17, the following operations (a) and (b) can be performed.

(a)実施例1の(0)の工程に代えて次の動作を行う。
消石灰注入装置2を作動させて、消石灰槽1からスラリー槽3へ消石灰を供給する。また、バルブV17を開状態にし、他のバルブを閉状態にし、水供給ポンプ9を作動させて、浄水槽8から浄水Tをスラリー槽3へ直接的に供給する。そして、スラリー槽3で消石灰と水とを攪拌し、消石灰のスラリーLを調整する。
これにより、浄水Tをスラリー槽3へ速やかに供給できる。
(A) The following operation is performed instead of the step (0) of the first embodiment.
The slaked lime injection device 2 is operated to supply slaked lime from the slaked lime tank 1 to the slurry tank 3. Further, the valve V17 is opened, the other valves are closed, the water supply pump 9 is operated, and the purified water T is directly supplied from the purified water tank 8 to the slurry tank 3. And the slaked lime and water are stirred in the slurry tank 3, and the slurry L of slaked lime is adjusted.
Thereby, the purified water T can be quickly supplied to the slurry tank 3.

(b)実施例1の(4)の工程に代えて次の動作を行う。
実施例1の(2)(3)の工程を交互に例えば1ヶ月継続すると、新たに(2)の工程を実行する代わりに、バルブV2,V4,V17を開状態にし、他のバルブを閉状態にし、スラリー供給ポンプ4,水供給ポンプ9を作動させる。スラリーLは、スラリー供給ポンプ4によりろ過膜モジュール6の一次側へ供給され、スラリーLに含まれる固形物はろ過膜モジュール6により分離され、ろ過膜モジュール6の二次側に固形物を含まない石灰水Wが得られる。流量調節装置7は、一定量の石灰水Wを所望の注入場所に供給する。他方、浄水Tは、水供給ポンプ9により水補給路14からスラリー槽3に補給される。これと並行して、バルブV13,V15を開状態にし、ろ過膜モジュール5の一次側の排液を行う。次いで、バルブV13を閉状態にし、バルブV11を開状態にし、薬液供給ポンプ13を作動させて、ろ過膜モジュール5の一次側に薬液Aを供給し、薬液洗浄を行う。次いで、薬液供給ポンプ13を停止させ、バルブV13を開状態にし、ろ過膜モジュール5の一次側の薬液Aを排液する。次いで、バルブV9を開状態にし、浄水Tをろ過膜モジュール5の二次側に供給してろ過膜を逆洗し、ろ過膜モジュール5の一次側へ透過した水で薬液を洗い流す。
次に、バルブV1,V3を開状態にし、他のバルブを閉状態にする。スラリーLは、スラリー供給ポンプ4によりろ過膜モジュール5の一次側へ供給され、スラリーLに含まれる固形物はろ過膜モジュール5により分離され、ろ過膜モジュール5の二次側に固形物を含まない石灰水Wが得られる。流量調節装置7は、一定量の石灰水Wを所望の注入場所に供給する。他方、浄水Tは、水供給ポンプ9により水補給路14からスラリー槽3に補給される。これと並行して、バルブV14,V16を開状態にし、ろ過膜モジュール6の一次側の排液を行う。次いで、バルブV14を閉状態にし、バルブV12を開状態にし、薬液供給ポンプ13を作動させて、ろ過膜モジュール6の一次側に薬液Aを供給し、薬液洗浄を行う。次いで、薬液供給ポンプ13を停止させ、バルブV14を開状態にし、ろ過膜モジュール6の一次側の薬液Aを排液する。次いで、バルブV10を開状態にし、浄水Tをろ過膜モジュール6の二次側に供給してろ過膜を逆洗し、ろ過膜モジュール6の一次側へ透過した水で薬液を洗い流す。
そして、全てのバルブを閉状態とし、上記(1)の工程へ戻る。
これにより、運転を継続しながら薬液洗浄を実施できる。
(B) The following operation is performed instead of the step (4) in the first embodiment.
If steps (2) and (3) of Example 1 are continued alternately for one month, for example, instead of executing step (2) again, valves V2, V4, and V17 are opened and other valves are closed. Then, the slurry supply pump 4 and the water supply pump 9 are operated. The slurry L is supplied to the primary side of the filtration membrane module 6 by the slurry supply pump 4, the solid matter contained in the slurry L is separated by the filtration membrane module 6, and no solid matter is contained on the secondary side of the filtration membrane module 6. Lime water W is obtained. The flow control device 7 supplies a certain amount of lime water W to a desired injection location. On the other hand, the purified water T is supplied from the water supply path 14 to the slurry tank 3 by the water supply pump 9. In parallel with this, the valves V13 and V15 are opened, and the primary side of the filtration membrane module 5 is drained. Next, the valve V13 is closed, the valve V11 is opened, the chemical liquid supply pump 13 is operated, the chemical liquid A is supplied to the primary side of the filtration membrane module 5, and chemical liquid cleaning is performed. Next, the chemical solution supply pump 13 is stopped, the valve V13 is opened, and the chemical solution A on the primary side of the filtration membrane module 5 is drained. Next, the valve V9 is opened, purified water T is supplied to the secondary side of the filtration membrane module 5 to backwash the filtration membrane, and the chemical solution is washed away with water that has permeated to the primary side of the filtration membrane module 5.
Next, the valves V1 and V3 are opened, and the other valves are closed. The slurry L is supplied to the primary side of the filtration membrane module 5 by the slurry supply pump 4, the solid matter contained in the slurry L is separated by the filtration membrane module 5, and no solid matter is contained on the secondary side of the filtration membrane module 5. Lime water W is obtained. The flow control device 7 supplies a certain amount of lime water W to a desired injection location. On the other hand, the purified water T is supplied from the water supply path 14 to the slurry tank 3 by the water supply pump 9. In parallel with this, the valves V14 and V16 are opened to drain the primary side of the filtration membrane module 6. Next, the valve V14 is closed, the valve V12 is opened, the chemical solution supply pump 13 is operated, the chemical solution A is supplied to the primary side of the filtration membrane module 6, and chemical cleaning is performed. Next, the chemical solution supply pump 13 is stopped, the valve V14 is opened, and the chemical solution A on the primary side of the filtration membrane module 6 is drained. Next, the valve V10 is opened, purified water T is supplied to the secondary side of the filtration membrane module 6 to backwash the filtration membrane, and the chemical solution is washed away with water that has permeated to the primary side of the filtration membrane module 6.
Then, all the valves are closed, and the process returns to the above step (1).
Thereby, chemical | medical solution washing | cleaning can be implemented, continuing a driving | operation.

石灰水Wの必要注入量に応じて、ろ過膜モジュールの数量を1モジュールにしたり、2モジュール以上にしてもよい。ただし、ろ過膜モジュールを1モジュールにした場合、洗浄時には石灰水Wの製造が停止するので、石灰水Wの貯留槽を備えるのが好ましい。   Depending on the required injection amount of lime water W, the number of filtration membrane modules may be one module or two or more modules. However, since the production of the lime water W stops at the time of washing | cleaning, when the filtration membrane module is made into 1 module, it is preferable to provide the storage tank of the lime water W.

本発明の石灰水注入装置は、浄水処理施設において、pH調整や水の腐食性を改善するのに利用できる。   The lime water injection device of the present invention can be used to improve pH adjustment and water corrosivity in water purification facilities.

実施例1に係る石灰水注入装置を示す構成図である。It is a block diagram which shows the lime water injection | pouring apparatus which concerns on Example 1. FIG. 評価試験の結果を示すグラフである。It is a graph which shows the result of an evaluation test. 実施例2に係る石灰水注入装置を示す構成図である。It is a block diagram which shows the lime water injection | pouring apparatus which concerns on Example 2. FIG.

符号の説明Explanation of symbols

1 消石灰槽
2 消石灰注入装置
3 スラリー槽
4 スラリー供給ポンプ
5,6 ろ過膜モジュール
7 流量調節装置
8 浄水槽
9 水供給ポンプ
10 コンプレッサ
11,14 水補給路
20 制御装置
V1〜V19 バルブ
DESCRIPTION OF SYMBOLS 1 Slaked lime tank 2 Slaked lime injection | pouring apparatus 3 Slurry tank 4 Slurry supply pumps 5, 6 Filtration membrane module 7 Flow control device 8 Water purification tank 9 Water supply pump 10 Compressor 11, 14 Water supply path 20 Controllers V1-V19 Valve

Claims (5)

消石灰のスラリーを貯留するスラリー槽と、ケーシング収納タイプのろ過膜モジュールと、前記スラリー槽から前記ろ過膜モジュールへ前記スラリーを送給するための流路手段と、前記流路手段を連通するか遮断するかを切り替える連通/遮断手段と、前記流路手段を連通した状態で前記スラリー槽から前記ろ過膜モジュールの一次側へ前記スラリーを送り込むスラリー送給手段とを具備したことを特徴とする石灰水注入装置。 A slurry tank for storing slaked lime slurry, a casing storage type filtration membrane module, a flow path means for feeding the slurry from the slurry tank to the filtration membrane module, and the flow path means communicating or blocked Lime water characterized by comprising communication / blocking means for switching between and a slurry feeding means for feeding the slurry from the slurry tank to the primary side of the filtration membrane module in a state where the flow path means is communicated. Injection device. 請求項1に記載の石灰水注入装置において、前記流路手段を遮断した状態で前記ろ過膜モジュールの一次側へ薬液を送り込む薬液送給手段を具備したことを特徴とする石灰水注入装置。 The lime water injecting apparatus according to claim 1, further comprising a chemical liquid feeding means for feeding a chemical liquid to a primary side of the filtration membrane module in a state where the flow path means is blocked. 請求項2に記載の石灰水注入装置において、前記流路手段を遮断した状態で前記ろ過膜モジュールの二次側へ逆洗用水を送り込む逆洗用水送給手段を具備したことを特徴とする石灰水注入装置。 The lime water injecting apparatus according to claim 2, comprising lime water feeding means for feeding back washing water to the secondary side of the filtration membrane module in a state where the flow path means is shut off. Water injection device. 請求項1または請求項2に記載の石灰水注入装置において、複数台の前記ケーシング収納タイプのろ過膜モジュールと、それらに対応する複数の前記流路手段および前記連通/遮断手段と、前記流路手段の一部を連通状態としたまま残りの一部または全部を遮断状態とする連通・遮断並行化手段と、前記遮断状態とした前記ろ過膜モジュールの二次側へ逆洗用水を送り込む逆洗用水送給手段とを具備したことを特徴とする石灰水注入装置。 3. The lime water injecting apparatus according to claim 1, wherein a plurality of the casing-accommodating type filtration membrane modules, a plurality of the flow path means and the communication / blocking means corresponding thereto, and the flow paths are provided. Parallel communication / blocking parallel means for blocking the remaining part or all of the means while maintaining a part of the means, and backwashing for feeding backwash water to the secondary side of the filtration membrane module in the blocked state A lime water injection device characterized by comprising water supply means. 請求項3または請求項4に記載の石灰水注入装置において、前記逆洗用水の透過により前記ろ過膜モジュールの一次側に生じた水を前記スラリー槽へ補給する水補給手段を具備したことを特徴とする石灰水注入装置。 5. The lime water injecting apparatus according to claim 3 or 4, further comprising water replenishing means for replenishing the slurry tank with water generated on a primary side of the filtration membrane module by permeation of the backwash water. Lime water injection device.
JP2005027505A 2005-02-03 2005-02-03 Apparatus for injecting lime water Pending JP2006212536A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109011819A (en) * 2018-08-24 2018-12-18 中国科学院青海盐湖研究所 A kind of automation, the method and system that continuously separate of serialization solid-liquid
CN109092060A (en) * 2018-08-24 2018-12-28 中国科学院青海盐湖研究所 A kind of solid-liquid continuously washs and isolated method and system
KR102362625B1 (en) * 2021-10-01 2022-02-14 주식회사 우영씨앤티 Clogging prevention system of liquid slaked lime for oxidative neutralization treatment of mine wastewater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109011819A (en) * 2018-08-24 2018-12-18 中国科学院青海盐湖研究所 A kind of automation, the method and system that continuously separate of serialization solid-liquid
CN109092060A (en) * 2018-08-24 2018-12-28 中国科学院青海盐湖研究所 A kind of solid-liquid continuously washs and isolated method and system
KR102362625B1 (en) * 2021-10-01 2022-02-14 주식회사 우영씨앤티 Clogging prevention system of liquid slaked lime for oxidative neutralization treatment of mine wastewater

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