JP2004160308A

JP2004160308A - Filtrate piping structure of permeable membrane module

Info

Publication number: JP2004160308A
Application number: JP2002327273A
Authority: JP
Inventors: Kazue Nozeki; 和重能関
Original assignee: Asahi Kasei Chemicals Corp
Current assignee: Asahi Kasei Chemicals Corp
Priority date: 2002-11-11
Filing date: 2002-11-11
Publication date: 2004-06-10
Anticipated expiration: 2022-11-11
Also published as: JP4025624B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filtrate piping structure which enables to carry out exact measurement of individual filtrate amounts of a filter membrane module without an increase in electric wiring or the number and producing man-hour of component electric parts by modifying a flow meter for measuring a whole filtrate amount irrespective of a measuring scale width or a measuring scale range of the flow meter for measuring a whole filtrate amount by configuration to connect piping for flowing filtrate having only the filter membrane module to measure the individual filtrate amounts with the filtrate piping of the filter membrane module only when the individual filtrate amounts of the filter membrane module are measured. <P>SOLUTION: The filtrate piping 2 extending from a filtrate outlet of the filter membrane module 1 is bifurcated and connected with piping having one end with a connection joint 4a and the other end with a connection joint 4b corresponding the connection joint 4a. The filtrate piping structure is configured to flow the filtrate only for the filter membrane module 1 for measurement of the individual filtrate amounts into the piping to measure the individual filtrate amounts. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、濾過装置に２以上に配列された濾過膜モジュールの個別濾液量を測定するために有効な濾過膜モジュールの濾液配管構造に関するものである。
【０００２】
【従来の技術】
濾過装置に２以上に配列された濾過膜モジュールは定期的に個別濾液量の測定がなされ、濾液量の低下している濾過膜モジュールは交換される。
従来の濾過膜モジュールの濾液配管構造について図３を用いて説明する。図３において、濾過膜モジュール１の濾液配管２は手動バルブ２ａを介して濾液集合管３に接続されており、濾液集合管３は全体濾液量測定用流量計１１を介して濾液タンク１２に接続されている（例えば、非特許文献１参照。）。
【０００３】
なお、通常、全体濾液量測定用流量計１１は濾液集合管に常設されており、通液するのみで流量の計測が可能な面積式流量計を用いている。
濾過膜モジュールの個別濾液量を測定する場合は、例えば全ての濾過膜モジュールの濾液配管２に設けられた手動バルブ２ａを開き全体濾液量測定用流量計１１を用いて測定した全体濾液量の値と個別濾液量を測定しようとする濾過膜モジュールの濾液配管２に設けられた手動バルブ２ａのみを閉め全体濾液量測定用流量計１１を用いて測定した全体濾液量の値の差を、該手動バルブ２ａを閉めた濾過膜モジュールの個別濾液量としていた。
【０００４】
或いは、個別濾液量を測定しようとする濾過膜モジュールの濾液配管２に設けられた手動バルブ２ａのみを開きその他の濾過膜モジュールの濾液配管２に設けられた手動バルブ２ａを閉め全体濾液量測定用流量計１１で測定した値を、該手動バルブ２ａを開いた濾過膜モジュールの個別濾液量としていた。
【０００５】
【非特許文献１】
清水博、西村正人監修「最新の膜処理技術とその応用」（株）フジ・テクノシステム出版、１９８４年８月１日、ｐ１４９、図−２
【０００６】
【発明が解決しようとする課題】
しかしながら、前述の操作及び図３に示した濾液配管構造で濾過膜モジュールの個別濾液量を測定すると、例えば、面積式の全体濾液量測定用流量計１１では測定目盛り幅や測定目盛り範囲により濾過膜モジュールの個別濾液量が正確に測定できないという問題があった。濾液量の差が全体濾液量測定用流量計１１の目盛り幅に比べて小さいときには濾液量の差を精度良く読み取ることが難しくなり、或いは全体濾液量測定用流量計１１の測定目盛り範囲の最小値が濾過膜モジュールの個別濾液量以上の場合は濾過膜モジュールの個別濾液量が測定できないという問題である。
【０００７】
また、全体濾液量測定用流量計を用いて個別濾液量を正確に測定するには例えば全体濾液測定用流量計を電磁式流量計等の電気的な信号を用いた精度の高い流量計に変更する必要があり、前記電磁式流量計等に変更した場合は接続する電気配線や構成する電気部品の点数が多くなり製作工数が増大するという問題があった。
【０００８】
本発明は、上記課題を解決するためになされたものであり、濾過膜モジュールの個別濾液量を測定する場合のみ、個別濾液量を測定する濾過膜モジュールのみの濾液を流す配管を前記濾過膜モジュールの濾液配管に接続できる構造を持つことで、全体濾液量測定用流量計の測定目盛り幅や測定目盛り範囲に関係なく、また、全体濾液量測定用流量計を変更し電気配線や構成する電気部品の点数及び製作工数を増やすことなく濾過膜モジュールの個別濾液量の正確な測定が可能な濾液配管構造を提供することを目的とする。
【０００９】
【課題を解決するための手段】
本発明者は前記目的を達成するため新規な濾過膜モジュールの濾液配管構造を見出し、本発明をなすに至った。即ち、本発明は、１）２以上に配列された濾過膜モジュールの濾液配管が、濾過膜モジュールの濾液出口から濾液集合管に至る前に備わる弁までの間で分岐しており、その分岐した配管の端部に接続継手を備え、該接続継手は対の接続継手のみと接続の着脱が可能で対の接続継手を接続した時は液が流通し対の接続継手を接続しない時は液が流出しない機能を有することを特徴とする濾過膜モジュールの濾液配管構造、２）２以上に配列された濾過膜モジュールでかつ濾液出口を２ヶ所有する濾過膜モジュールの各々の濾液出口の濾液配管において、一方は濾液出口から弁を介して濾液集合管に接続されており、もう一方は濾液出口からの濾液配管の端部に接続継手を備え、該接続継手は対の接続継手のみと接続の着脱が可能で対の接続継手を接続した時は液が流通し対の接続継手を接続しない時は液が流出しない機能を有することを特徴とする濾過膜モジュールの濾液配管構造である。
【００１０】
本発明における濾過膜モジュールとは、後述する濾過膜をハウジングに収めた構造を有しており、該ハウジングは原液を導入する原液入口と原液を排出する原液出口を夫々１ヶ所有し、濾液出口は１ヶ所、或いは２ヶ所有している。濾過膜は、特に限定しないが中空糸状の限外濾過膜、或いは精密濾過膜等を用いることができる。２以上に配列されたとは、上記濾過膜モジュールを使用した濾過装置において、２基以上の濾過膜モジュールが向きを揃えて規則的に配置され配管に接続されている状態のことである。接続継手とは、分離されている２本の配管を接続して１本にする、或いは１本の配管の途中の接続を外して２本に分離することが適宜可能なように各々の配管端部に設けられた配管構成部品のことであり、例えばカプラ等がある。
【００１１】
本発明によれば、濾過膜モジュールの個別濾液量を測定する場合は前述の接続継手に例えば一部が可撓性の管からなる流量計を備えた配管でかつ端部に該接続継手と対の接続継手を備えた配管を接続し、個別濾液量を測定する濾過膜モジュールのみの濾液を前記配管に流して個別濾液量を測定することができるため、全体濾液量測定用流量計の測定目盛り幅や測定目盛り範囲に関係なく、また、全体濾液量測定用流量計を変更し電気配線や構成する電気部品の点数及び製作工数を増やすことなく濾過膜モジュールの個別濾液量の正確な測定ができる。
【００１２】
また、濾過膜モジュールの個別濾液量を測定しない場合は、一部が可撓性の管からなる流量計を備えかつ端部が接続継手の配管は接続継手部分の接続を外すことにより濾過膜モジュールから切り離し個別濾液が流れないようにしておけると同時に、接続継手の液が流出しない機能によって濾液の流出を防ぐ事ができる。そして、一部が可撓性の管からなる流量計を備えた配管の可撓部分は、２以上に配列された濾過膜モジュールの両端の濾過膜モジュールの各々の濾液出口を直線で結ぶ距離以上の長さであると、同一の流量計で全ての濾過モジュール個別濾液量を測ることができるので好ましい。
【００１３】
更に、一部が可撓性の管からなる流量計を備えた配管は、濾過膜モジュールの個別濾液量を測定した際の該濾過膜モジュールの個別濾液が濾液タンクに導かれ貯蔵されるように接続すると濾液の損失を防ぐことができるので好ましい。
可撓性の管とは、任意の箇所で曲げることができかつ元の状態に戻すこともできる配管のことであり、例えば塩化ビニール（ＰＶＣ）製ホース等がある。
【００１４】
【発明の実施の形態】
図により本発明に係る濾過膜モジュールの配管構造の一実施形態を具体的に説明する。図１及び図２は本発明に係る濾過膜モジュールの配管構造を示す図である。
本発明に係る濾過膜モジュールの濾液配管構造は、例えば、電着塗料、電着塗装工程後の純水による洗浄排水（以下、電着塗料の純水洗水と称す）等を原液とし、その原液を循環しながら濾過を行うクロスフロー型の精密濾過装置或いは限外濾過装置において、各々の濾過膜モジュールの濾液量を測定するための濾液配管に有用なものである。
本発明を実施例に基づいて説明する。
【００１５】
【実施例１】
図１のように、限外濾過膜モジュール（旭化成株式会社製、限外濾過膜モジュール、ＥＣＳ−３０１０）１を５本並べて濾過装置に設置した。各々の濾過膜モジュール１は一方の濾液出口から濾液集合管３に至る濾液配管２に備わる手動バルブ２ａまでの間で分岐して、その分岐した配管の端部に接続継手（日東工器株式会社製、迅速流体継手ハイカプラ）４ａを設けた。各々の濾過膜モジュール１のもう一方の濾液出口は封止板により封じた。
【００１６】
そして、図示しない循環ポンプにより原液となる電着塗料の純水洗水を原液供給集合管５に接続した原液配管６を介して各濾過膜モジュール１へ供給し、濾過膜モジュール１内の中空糸状膜により濾過した。濾液は濾液配管２及び手動バルブ２ａを介して濾液集合管３へ流し、全体濾液量測定用流量計（流体工業株式会社製、面積式流量計、ＧＴＦ−２）１１を介して濾液タンク１２に貯蔵した。
一方、原液配管６を介して濾過膜モジュール１に供給された電着塗料の純水洗水の一部は循環戻り液として濾過膜モジュール１の中空糸状膜の内側を流通して原液戻り配管７を介して原液戻り集合管８へ流れ、図示しない循環ポンプまたは原液タンクへ戻るようにした。
【００１７】
濾過膜モジュールの個別濾液量を測定する場合は、個別濾液量を測定する濾過膜モジュール１の濾液出口から濾液集合管３に至る濾液配管２に備わる手動バルブ２ａを閉め、濾液配管２が濾液集合管３に至る前に備わる手動バルブ２ａまでの間で分岐した配管の端部に設けた接続継手４ａと一部が可撓性のＰＶＣ製ホースからなる個別濾液量測定用流量計（流体工業株式会社製、面積式流量計、ＧＤＦ−２）１０を備えた配管でかつ端部に対の接続継手と接続しないときは液が流れない構造になっている接続継手４ａと対の接続継手（ともに日東工器株式会社製、迅速流体継手ハイカプラ）４ｂを備えた配管を接続し、個別濾液量を測定する濾過膜モジュール１のみの濾液を前記配管に流して個別濾液量を測定した。前述の一部が可撓性のＰＶＣ製ホースからなる個別濾液量測定用流量計１０を備えた配管は濾液タンク１２に接続されており、前記濾過膜モジュール１の個別濾液は該配管を流れて濾液タンク１２に導かれ貯蔵された。同様の操作を各々の濾過膜モジュールに対して実施し、５本の濾過膜モジュールの個別濾液量を測定した。
【００１８】
前記濾過膜モジュール１の個別濾液量の測定終了後、前記接続継手４ａと前記接続継手４ｂを切り離し、前記濾過膜モジュール１の濾液配管２に備わる手動バルブ２ａを開いた。
【００１９】
【実施例２】
図２のように、濾液出口を各々に２ヶ所有する限外濾過膜モジュール（旭化成株式会社製、限外濾過膜モジュール、ＥＣＳ−３０１０）１を５本並べて濾過装置に設置した。各々の濾過膜モジュール１の濾液出口において、一方は濾液出口からの濾液配管２を手動バルブ２ａを介して濾液集合管３に接続し、もう一方は濾液出口からの濾液配管１３の端部に接続継手４ａを設けた。
【００２０】
そして、図示しない循環ポンプにより実施例１と同様の原液を原液供給集合管５に接続した原液配管６を介して各濾過膜モジュール１へ供給し、濾過膜モジュール１内の中空糸状膜により濾過した。濾液は濾液配管２及び手動バルブ２ａを介して濾液集合管３へ流し、全体濾液量測定用流量計（実施例１と同様の流量計）１１を介して濾液タンク１２に貯蔵した。
一方、原液配管６を介して濾過膜モジュール１に供給された実施例１と同様の原液の一部は循環戻り液として濾過膜モジュール１の中空糸状膜の内側を流通して原液戻り配管７を介して原液戻り集合管８へ流れ、図示しない循環ポンプまたは原液タンクへ戻るようにした。
【００２１】
濾過膜モジュールの個別濾液量を測定する場合は、個別濾液量を測定する濾過膜モジュール１の一方の濾液出口から濾液集合管３に至る濾液配管２に備わる手動バルブ２ａを閉め、濾過膜モジュール１のもう一方の濾液出口からの濾液配管１３の端部に設けた接続継手４ａ（対の接続継手と接続していないときは液が流出しない構造のもの）と一部が可撓性のＰＶＣ製ホースからなる個別濾液量測定用流量計（実施例１と同様の流量計）１０を備えた配管でかつ端部に接続継手４ａと対の接続継手（実施例１と同様の対の接続継手）４ｂを備えた配管を接続し、個別濾液量を測定する濾過膜モジュール１のみの濾液を前記配管に流して個別濾液量を測定した。一部が可撓性のＰＶＣ製ホースからなる個別濾液量測定用流量計１０を備えた配管は濾液タンク１２に接続されており、前記濾過膜モジュール１の個別濾液は該配管を流れて濾液タンク１２に導かれ貯蔵された。同様の操作を各々の濾過膜モジュールに対して実施し、５本の濾過膜モジュールの個別濾液量を測定した。
【００２２】
前記濾過膜モジュール１の個別濾液量の測定終了後は、前記接続継手４ａと前記接続継手４ｂを切り離し、前記濾過膜モジュール１の濾液配管２に備わる手動バルブ２ａを開いた。
【００２３】
【発明の効果】
本発明は、濾過膜モジュールの個別濾液量を測定する場合のみ、個別濾液量を測定する濾過膜モジュールのみの濾液を流す配管を前記濾過膜モジュールの濾液配管に接続できる構造を持つことで、全体濾液量測定用流量計の測定目盛り幅や測定目盛り範囲に関係なく、また、全体濾液量測定用流量計を変更し電気配線や構成する電気部品の点数及び製作工数を増やすことなく濾過膜モジュールの個別濾液量の正確な測定が可能な濾液配管構造を提供することができる。
【図面の簡単な説明】
【図１】本発明に係る濾過膜モジュールの配管構造を示す図である。
【図２】本発明に係る濾過膜モジュールの配管構造を示す図である。
【図３】従来例を説明する図である。
【符号の説明】
１・・・濾過膜モジュール
２・・・濾液配管
２ａ・・・手動バルブ
３・・・濾液集合管
４ａ・・・接続継手
４ｂ・・・接続継手
５・・・原液供給集合管
６・・・原液配管
７・・・原液戻り配管
８・・・原液戻り集合管
９・・・可撓性配管
１０・・・個別濾液量測定用流量計
１１・・・全体濾液量測定用流量計
１２・・・濾液タンク
１３・・・濾液配管[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a filtrate piping structure of a filtration membrane module which is effective for measuring the amount of individual filtrate of two or more filtration membrane modules arranged in a filtration device.
[0002]
[Prior art]
The amount of filtrate of two or more filtration membrane modules arranged in the filtration device is periodically measured, and the filtration membrane module having a reduced filtrate amount is replaced.
A description will be given of a filtrate piping structure of a conventional filtration membrane module with reference to FIG. In FIG. 3, the filtrate pipe 2 of the filtration membrane module 1 is connected to a filtrate collecting pipe 3 via a manual valve 2a, and the filtrate collecting pipe 3 is connected to a filtrate tank 12 via a flow meter 11 for measuring the total amount of filtrate. (For example, see Non-Patent Document 1).
[0003]
The flowmeter 11 for measuring the total amount of filtrate is usually provided permanently in the filtrate collecting pipe, and an area type flowmeter capable of measuring the flow rate only by passing the liquid is used.
When measuring the individual filtrate amount of the filtration membrane module, for example, the manual valve 2a provided in the filtrate pipe 2 of all the filtration membrane modules is opened, and the value of the total filtrate amount measured using the whole filtrate amount measurement flow meter 11 is opened. Only the manual valve 2a provided in the filtrate pipe 2 of the filtration membrane module whose individual filtrate volume is to be measured is closed, and the difference between the values of the total filtrate volume measured using the flow meter 11 for measuring the total filtrate volume is determined by the manual operation. The individual filtrate amount of the filtration membrane module with the valve 2a closed was used.
[0004]
Alternatively, only the manual valve 2a provided on the filtrate pipe 2 of the filtration membrane module whose individual filtrate volume is to be measured is opened, and the manual valve 2a provided on the filtrate pipe 2 of the other filtration membrane module is closed to measure the total filtrate volume. The value measured by the flow meter 11 was used as the individual filtrate amount of the filtration membrane module with the manual valve 2a opened.
[0005]
[Non-patent document 1]
Hiroshi Shimizu, Masato Nishimura, “Latest Membrane Processing Technology and Its Application”, Fuji Techno System Publishing Co., Ltd., August 1, 1984, p.149, Figure 2
[0006]
[Problems to be solved by the invention]
However, when the individual filtrate amount of the filtration membrane module is measured by the above-described operation and the filtrate piping structure shown in FIG. 3, for example, in the area-type flowmeter 11 for measuring the total filtrate amount, the filtration membrane is determined by the measurement scale width and the measurement scale range. There is a problem that the individual filtrate amount of the module cannot be measured accurately. When the difference in the amount of filtrate is smaller than the scale width of the flow meter 11 for measuring the total amount of filtrate, it becomes difficult to accurately read the difference in the amount of filtrate, or the minimum value of the measurement scale range of the flow meter 11 for measuring the total amount of filtrate. Is larger than the individual filtrate volume of the filtration membrane module, the individual filtrate volume of the filtration membrane module cannot be measured.
[0007]
In addition, in order to accurately measure the amount of individual filtrate using the flow meter for measuring the total amount of filtrate, for example, change the flow meter for measuring the total filtrate to a high-precision flow meter using an electrical signal such as an electromagnetic flow meter. In the case of changing to the electromagnetic flow meter or the like, there is a problem that the number of electrical wirings to be connected and the number of electrical components to be configured increase, and the number of manufacturing steps increases.
[0008]
The present invention has been made to solve the above problems, and only when measuring the individual filtrate amount of the filtration membrane module, the piping for flowing the filtrate of only the filtration membrane module for measuring the individual filtrate amount is provided. With a structure that can be connected to the filtrate pipe of the above, regardless of the measurement scale width and the measurement scale range of the flow meter for measuring the total amount of filtrate, and changing the flow meter for measuring the total filtrate amount, the electric wiring and the electric parts to be configured It is an object of the present invention to provide a filtrate piping structure capable of accurately measuring the individual filtrate amount of a filtration membrane module without increasing the number of points and the number of manufacturing steps.
[0009]
[Means for Solving the Problems]
The present inventors have found a filtrate piping structure of a novel filtration membrane module to achieve the above object, and have accomplished the present invention. That is, in the present invention, 1) the filtrate piping of the two or more arranged filtration membrane modules is branched from the filtrate outlet of the filtration membrane module to a valve provided before reaching the filtrate collecting pipe, and the branch is made. A connection joint is provided at the end of the pipe, and the connection joint can be connected and detached only to the connection joint of the pair. When the connection joint of the pair is connected, the liquid flows and when the connection joint of the pair is not connected, the liquid flows. A filtrate piping structure of a filtration membrane module having a function of preventing outflow; 2) in a filtrate piping at each filtrate outlet of a filtration membrane module having two or more filtrate membrane modules and having two filtrate outlets, One is connected from the filtrate outlet to the filtrate collecting pipe via a valve, and the other is provided with a connection joint at the end of the filtrate pipe from the filtrate outlet, and the connection joint is connected and detached only with the pair of connection joints. Possible paired connection fittings When connected when the liquid does not connect the connection joints against circulation is filtrate piping structure of the filtration membrane module characterized by having a function of liquid does not flow out.
[0010]
The filtration membrane module according to the present invention has a structure in which a filtration membrane described later is housed in a housing, and the housing has one stock solution inlet for introducing stock solution and one stock solution outlet for discharging stock solution, and the filtrate outlet. Owns one or two locations. The filtration membrane is not particularly limited, but a hollow fiber ultrafiltration membrane or a microfiltration membrane can be used. The arrangement of two or more filtration membrane modules refers to a state in which two or more filtration membrane modules are regularly arranged in the same direction and connected to a pipe in a filtration device using the filtration membrane module. The connection joint is a connection end of each pipe so that it is possible to connect two separated pipes into one pipe or to disconnect the middle of one pipe and separate them into two pipes as appropriate. Means a piping component provided in the section, such as a coupler.
[0011]
According to the present invention, when measuring the individual filtrate amount of the filtration membrane module, the connection joint described above is, for example, a pipe provided with a flow meter partially composed of a flexible pipe, and is connected to the connection joint at an end. The pipes provided with the connection joints are connected to each other, and the filtrate of only the filtration membrane module for measuring the amount of the individual filtrate can be passed through the pipe to measure the amount of the individual filtrate. Accurate measurement of the individual filtrate volume of the filtration membrane module can be performed irrespective of the width and the measurement scale range, and without changing the flowmeter for measuring the total filtrate volume and increasing the number of electrical wirings and the number of electrical components and manufacturing steps. .
[0012]
When the individual filtrate volume of the filtration membrane module is not measured, the filtration membrane module may be provided with a flow meter having a partly flexible tube, and a pipe having a connection joint at an end part of which is disconnected from the connection joint part. And the individual filtrate can be prevented from flowing, and at the same time, the outflow of the filtrate can be prevented by the function of the connection joint not to flow the liquid. The flexible portion of the pipe provided with a flow meter partially composed of a flexible tube is longer than a distance connecting the filtrate outlets of the filtration membrane modules at both ends of the two or more arranged filtration membrane modules with a straight line. Is preferable because the same filtrate meter can measure the individual filtrate amount of all the filtration modules.
[0013]
Further, the pipe provided with a flow meter partially composed of a flexible tube is provided so that the individual filtrate of the filtration membrane module when the individual filtrate amount of the filtration membrane module is measured is guided to the filtrate tank and stored. The connection is preferable because loss of the filtrate can be prevented.
The flexible pipe is a pipe that can be bent at an arbitrary position and can be returned to an original state, such as a hose made of vinyl chloride (PVC).
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the piping structure of the filtration membrane module according to the present invention will be specifically described with reference to the drawings. 1 and 2 are views showing a piping structure of a filtration membrane module according to the present invention.
The filtrate piping structure of the filtration membrane module according to the present invention includes, for example, an electrodeposition paint, a washing wastewater with pure water after the electrodeposition coating process (hereinafter, referred to as a pure water washing of the electrodeposition paint), and the like. In a cross-flow type microfiltration device or an ultrafiltration device that performs filtration while circulating water, the filter is useful for a filtrate pipe for measuring a filtrate amount of each filtration membrane module.
The present invention will be described based on examples.
[0015]
Embodiment 1
As shown in FIG. 1, five ultrafiltration membrane modules (manufactured by Asahi Kasei Corporation, ultrafiltration membrane modules, ECS-3010) were arranged in a row of five and installed in a filtration device. Each filtration membrane module 1 branches from one filtrate outlet to a manual valve 2a provided in a filtrate pipe 2 extending to a filtrate collecting pipe 3, and a connection joint (Nitto Kohki Co., Ltd.) is connected to an end of the branched pipe. And a quick fluid coupling high coupler) 4a. The other filtrate outlet of each filtration membrane module 1 was sealed with a sealing plate.
[0016]
Then, pure water washing of the electrodeposition paint as a stock solution is supplied to each filtration membrane module 1 through a stock solution pipe 6 connected to the stock solution supply pipe 5 by a circulation pump (not shown), and the hollow fiber membrane in the filtration membrane module 1 is supplied. By filtration. The filtrate flows into the filtrate collecting pipe 3 via the filtrate pipe 2 and the manual valve 2a, and then flows to the filtrate tank 12 via a flow meter 11 for measuring the total amount of filtrate (manufactured by Fluid Industries Co., Ltd., area type flow meter, GTF-2) 11. Stored.
On the other hand, a part of the pure water washing of the electrodeposition paint supplied to the filtration membrane module 1 via the stock solution pipe 6 circulates through the inside of the hollow fiber membrane of the filtration membrane module 1 as a circulating return solution and passes through the stock solution return pipe 7. The liquid then flows to the undiluted liquid return collecting pipe 8 and returns to a circulating pump or undiluted liquid tank (not shown).
[0017]
When measuring the individual filtrate volume of the filtration membrane module, the manual valve 2a provided in the filtrate pipe 2 from the filtrate outlet of the filtration membrane module 1 for measuring the individual filtrate volume to the filtrate collection pipe 3 is closed, and the filtrate pipe 2 is collected. A flow meter for measuring the amount of individual filtrate (available from Fluid Industries Co., Ltd.) consisting of a connection joint 4a provided at the end of a pipe branched to a manual valve 2a provided before reaching the pipe 3 and a part made of a flexible PVC hose. Company-made, area-type flowmeter, GDF-2) piping with 10 and a connection joint 4a and a pair of connection joints (both of which are configured so that liquid does not flow when they are not connected to the end at the end. A pipe provided with a quick fluid coupling high coupler (Nitto Koki Co., Ltd.) 4b was connected, and the filtrate of only the filtration membrane module 1 for measuring the amount of individual filtrate was passed through the pipe to measure the amount of individual filtrate. The pipe provided with the flowmeter 10 for measuring the amount of individual filtrate, which is partially made of a flexible PVC hose, is connected to the filtrate tank 12, and the individual filtrate of the filtration membrane module 1 flows through the pipe. It was led to the filtrate tank 12 and stored. The same operation was performed for each of the filtration membrane modules, and the individual filtrate amounts of the five filtration membrane modules were measured.
[0018]
After the measurement of the individual filtrate amount of the filtration membrane module 1, the connection joint 4a and the connection joint 4b were cut off, and the manual valve 2a provided in the filtrate pipe 2 of the filtration membrane module 1 was opened.
[0019]
Embodiment 2
As shown in FIG. 2, five ultrafiltration membrane modules (Ultrafiltration membrane modules, ECS-3010, manufactured by Asahi Kasei Corporation) each having two filtrate outlets were arranged in a filtration apparatus. At the filtrate outlet of each filtration membrane module 1, one connects the filtrate pipe 2 from the filtrate outlet to the filtrate collecting pipe 3 via the manual valve 2a, and the other connects to the end of the filtrate pipe 13 from the filtrate outlet. The joint 4a was provided.
[0020]
Then, the same undiluted solution as in Example 1 was supplied to each filtration membrane module 1 through a undiluted solution pipe 6 connected to the undiluted solution supply collecting pipe 5 by a circulation pump (not shown), and was filtered by the hollow fiber membrane in the filtration membrane module 1. . The filtrate was allowed to flow into the filtrate collecting pipe 3 via the filtrate pipe 2 and the manual valve 2a, and stored in the filtrate tank 12 via the flowmeter 11 for measuring the total amount of filtrate (the same flowmeter as in Example 1).
On the other hand, a part of the stock solution similar to that of Example 1 supplied to the filtration membrane module 1 via the stock solution pipe 6 flows through the inside of the hollow fiber membrane of the filtration membrane module 1 as a circulating return solution and passes through the stock solution return pipe 7. The liquid then flows to the undiluted liquid return collecting pipe 8 and returns to a circulating pump or undiluted liquid tank (not shown).
[0021]
When measuring the individual filtrate volume of the filtration membrane module, the manual valve 2a provided in the filtrate pipe 2 from one filtrate outlet to the filtrate collecting pipe 3 of the filtration membrane module 1 for measuring the individual filtrate volume is closed, and the filtration membrane module 1 A connecting joint 4a (having a structure in which the liquid does not flow out when not connected to a pair of connecting joints) provided at the end of the filtrate pipe 13 from the other filtrate outlet and a part made of flexible PVC A pipe provided with a flowmeter for measuring the amount of individual filtrate (a flowmeter similar to that of Example 1) 10 composed of a hose, and a pair of connection joints at the end with a connection joint 4a (a pair of connection joints similar to Example 1). The pipe provided with 4b was connected, and the filtrate of only the filtration membrane module 1 for measuring the amount of individual filtrate was passed through the pipe to measure the amount of individual filtrate. A pipe provided with a flowmeter 10 for measuring the amount of individual filtrate, which is partially made of a flexible PVC hose, is connected to a filtrate tank 12, and the individual filtrate of the filtration membrane module 1 flows through the pipe and flows into the filtrate tank. It was led to 12 and stored. The same operation was performed for each of the filtration membrane modules, and the individual filtrate amounts of the five filtration membrane modules were measured.
[0022]
After the measurement of the individual filtrate amount of the filtration membrane module 1, the connection joint 4a and the connection joint 4b were cut off, and the manual valve 2a provided in the filtrate pipe 2 of the filtration membrane module 1 was opened.
[0023]
【The invention's effect】
The present invention has a structure in which a pipe for flowing a filtrate of only a filtration membrane module for measuring an individual filtrate amount can be connected to a filtrate pipe of the filtration membrane module only when measuring an individual filtrate amount of the filtration membrane module. Regardless of the measurement scale width and the measurement scale range of the filtrate amount measurement flow meter, and without changing the total filtrate amount measurement flow meter and increasing the number of electrical wiring and the number of electrical components and manufacturing steps, the filtration membrane module can be used. It is possible to provide a filtrate piping structure capable of accurately measuring the amount of individual filtrate.
[Brief description of the drawings]
FIG. 1 is a diagram showing a piping structure of a filtration membrane module according to the present invention.
FIG. 2 is a diagram showing a piping structure of a filtration membrane module according to the present invention.
FIG. 3 is a diagram illustrating a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Filtration membrane module 2 ... Filtrate piping 2a ... Manual valve 3 ... Filtrate collecting pipe 4a ... Connection joint 4b ... Connection joint 5 ... Raw liquid supply collecting pipe 6 ... Undiluted solution pipe 7 Undiluted solution return pipe 8 Undiluted solution return collecting pipe 9 Flexible pipe 10 Flow meter 11 for measuring the amount of individual filtrate 11 Flow meter 12 for measuring the total amount of filtrate -Filtrate tank 13-Filtrate piping

Claims

The filtrate pipes of the filter membrane modules arranged in two or more branches from the filtrate outlet of the filter membrane module to a valve provided before reaching the filtrate collecting pipe, and a connection joint is provided at an end of the branched pipe. The connection joint can be connected and detached only to the connection joint of the pair, and has a function that the liquid flows when the connection joint of the pair is connected and the liquid does not flow out when the connection joint of the pair is not connected. Filtrate piping structure of the filtration membrane module.

In a filtrate pipe at each filtrate outlet of a filter membrane module having two or more filtrate membrane modules and having two filtrate outlets, one is connected to the filtrate collecting pipe through a valve from the filtrate outlet, and the other. Is provided with a connection joint at the end of the filtrate pipe from the filtrate outlet, and the connection joint can be connected and detached only to the connection joint of the pair. When the connection joint of the pair is connected, the liquid flows and the connection joint of the pair is connected. A filtrate piping structure for a filtration membrane module, which has a function of preventing liquid from flowing out when not connected.