JPH02126922A - Back washing method of separating membrane - Google Patents
Back washing method of separating membraneInfo
- Publication number
- JPH02126922A JPH02126922A JP27743188A JP27743188A JPH02126922A JP H02126922 A JPH02126922 A JP H02126922A JP 27743188 A JP27743188 A JP 27743188A JP 27743188 A JP27743188 A JP 27743188A JP H02126922 A JPH02126922 A JP H02126922A
- Authority
- JP
- Japan
- Prior art keywords
- separation membrane
- valve
- pressure
- supply
- internal pressure
- 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.)
- Pending
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 57
- 238000011001 backwashing Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 16
- 239000000706 filtrate Substances 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims description 59
- 239000011550 stock solution Substances 0.000 claims description 16
- 238000004064 recycling Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract 2
- 239000000126 substance Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は分離膜の逆洗方法、より詳しくは、油水分離や
各種化学品製造プロセスにおける濃縮精製等に用いられ
る膜分離装置の分離膜の逆洗方法に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for backwashing separation membranes, and more specifically, to a method for backwashing separation membranes in membrane separation devices used for oil/water separation and concentration purification in various chemical manufacturing processes. This relates to a backwashing method.
一般に膜を利用して原液から特定物質を除去する方法に
は、電位差を利用する方法、濃度差を利用する方法や圧
力差を利用する方法などがあるが、この内圧力差を利用
する方法が多く採られている。In general, methods for removing specific substances from stock solutions using membranes include methods that use potential difference, methods that use concentration difference, and methods that use pressure difference. It is widely taken.
この圧力差を利用した分離装置は、原液タンクから分離
膜を内装する分離膜モジュールの一次側へ供給ポンプに
より原液を圧送し、二次側との圧力差により特定分質が
分離膜の微小孔から二次側へ濾過するものである。A separation device that utilizes this pressure difference uses a supply pump to force feed the stock solution from the stock solution tank to the primary side of the separation membrane module containing the separation membrane, and the pressure difference with the secondary side causes specific substances to be separated from the micropores of the separation membrane. It is filtered from the secondary side to the secondary side.
ところで前記分離装置においては、分離膜の一次側に原
液中の固体粒子等が付着しで透過流量を減少させるので
、これを除去する必要があるが、この除去の一手法とし
て逆洗方法がある。By the way, in the above-mentioned separation device, solid particles in the raw solution adhere to the primary side of the separation membrane and reduce the permeation flow rate, so it is necessary to remove this. One method for removing this is a backwashing method. .
この分離膜の逆洗方法は、−船釣に分離膜モジュールの
一時側と二次側の圧力水車を逆転させることにより行う
。これを実現するための方法として例えば、二次側に圧
力供給手段を設け、−次側の供給ポンプを停止し、前記
圧力供給手段により分離膜の二次側を高圧とすることが
行なわれている。This method of backwashing the separation membrane is carried out by reversing the pressure water turbines on the primary and secondary sides of the separation membrane module during boat fishing. To achieve this, for example, a pressure supply means is provided on the secondary side, the supply pump on the downstream side is stopped, and the pressure supply means is used to increase the pressure on the secondary side of the separation membrane. There is.
しかしながら、かかる手段によると、−旦供給ポンプを
停止する必要があり、その操作は面倒なものとなってい
る。このような事情で供給ポンプと分離膜モジュールを
連結する管路より分離膜モジュールの二次側へバイパス
ラインを連結し、逆洗時には供給ポンプから送られる原
液をこのバイパスラインに流し、分離膜の二次側へ原液
を供給し、さらに外部圧力により分離膜の二次側を高圧
にすることが提案されている(例えば特開昭63−12
6513)。However, according to such a means, it is necessary to stop the supply pump once, making the operation cumbersome. Under these circumstances, a bypass line is connected to the secondary side of the separation membrane module from the pipe connecting the supply pump and the separation membrane module, and during backwashing, the stock solution sent from the supply pump is passed through this bypass line, and the separation membrane is It has been proposed to supply a stock solution to the secondary side and further increase the pressure on the secondary side of the separation membrane using external pressure (for example, JP-A-63-12
6513).
ところで前記したような、バイハスラインを設けた分離
装置においては、二次側への圧力供給手段を特別に設け
る必要があり、そのため装置全体の製作費が高くなると
云う問題があった。By the way, in the above-mentioned separation device provided with a bypass line, it is necessary to specially provide means for supplying pressure to the secondary side, which poses a problem in that the manufacturing cost of the entire device increases.
本発明は前記したような問題点を解決するためになされ
たものであって、原液を供給ポンプより原液タンクから
分離膜モジュールに導き、該分離膜モジュールにより分
離された濾液を濾液タンクに導くようにした分離膜装置
において、供給ポンプから分離膜モジュールに至る供給
管路に第1のバルブを有するリサイクル管を連結すると
ともに分離膜モジュールから濾液タンクに至る排出管路
に蓄圧器と第2のバルブとを配置し、前記第2のバルブ
を閉鎖して供給管路内圧と排出管路内圧とをほぼ均圧と
なした後、第1のバルブを開放して供給管路内圧を低下
させるようにした分離膜の逆洗方法である。The present invention has been made in order to solve the above-mentioned problems, and includes a supply pump that guides the stock solution from the stock solution tank to the separation membrane module, and guides the filtrate separated by the separation membrane module to the filtrate tank. In the separation membrane apparatus, a recycle pipe having a first valve is connected to the supply pipe from the supply pump to the separation membrane module, and a pressure accumulator and a second valve are connected to the discharge pipe from the separation membrane module to the filtrate tank. and closing the second valve to substantially equalize the internal pressure of the supply pipe and the internal pressure of the discharge pipe, and then opening the first valve to reduce the internal pressure of the supply pipe. This is a method for backwashing a separated separation membrane.
かかる分離装置において、通常運転時にはリサイクル管
に設けられた第1のバルブを閉鎖し、排出管に設けられ
た第2のバルブを開放して供給ポンプを作動させて、原
液タンクから原液を分離膜モジュールに供給する。この
ときの供給管内圧は5 kg / ci程度である。分
離膜モジュール内に供給された原液は分離膜の一次側か
ら圧力差により特定物質が二次側に濾過される。このと
き二次側の排出管内圧はほぼ大気圧である。In such a separation device, during normal operation, the first valve provided on the recycling pipe is closed, the second valve provided on the discharge pipe is opened, and the supply pump is operated to transfer the stock solution from the stock solution tank to the separation membrane. Supply to the module. The internal pressure of the supply pipe at this time is about 5 kg/ci. The stock solution supplied into the separation membrane module is filtered from the primary side of the separation membrane to the secondary side to remove specific substances due to the pressure difference. At this time, the internal pressure of the discharge pipe on the secondary side is approximately atmospheric pressure.
前記装置において逆洗するときは、供給ポンプは作動さ
せた状態で、先ず第2のバルブを閉鎖すると供給管内圧
、即ち、分離膜の一次側圧力と排出管内圧、即ち、分離
膜の二次側圧力がほぼ均一となる。その後、第2のバル
ブを開放すると分離膜の一次側圧力は低下し、二次側の
濾液が逆流する。この逆流によって分離膜の一次側に付
着している固体粒子等が除去される。When performing backwashing in the above device, first close the second valve while the supply pump is in operation, and the internal pressure of the supply pipe, that is, the primary side pressure of the separation membrane, and the internal pressure of the discharge pipe, that is, the secondary side pressure of the separation membrane. The side pressure becomes almost uniform. Thereafter, when the second valve is opened, the pressure on the primary side of the separation membrane decreases, and the filtrate on the secondary side flows back. This backflow removes solid particles and the like adhering to the primary side of the separation membrane.
以下本発明による分離膜の逆洗方法の実施例を図に基づ
き説明する。Embodiments of the method for backwashing a separation membrane according to the present invention will be described below with reference to the drawings.
図は、分離装置の系統図であって、1は原液タンクで、
この原液タンク1と分離膜を内装する分離膜モジュール
2の一次側とは、供給ポンプ3を有する供給管4とで連
結されている。そしてこの供給ポンプ3と分離膜モジュ
ール2間の供給管4aにはリサイクル管5の一端が連結
され、このリサイクル管5の他端は第1のバルブ6を介
して供給ポンプ3の入口側供給管4bに連結されている
。The figure is a system diagram of the separation device, where 1 is the stock solution tank;
The stock solution tank 1 and the primary side of a separation membrane module 2 containing a separation membrane are connected through a supply pipe 4 having a supply pump 3 . One end of a recycle pipe 5 is connected to the supply pipe 4a between the supply pump 3 and the separation membrane module 2, and the other end of the recycle pipe 5 is connected to the inlet side supply pipe of the supply pump 3 via a first valve 6. 4b.
分離膜モジュール2の二次側には蓄圧器7と第2のバル
ブ8を有する排出管9の一端が連結され、この排出管9
の他端は濾液タンク10に連通している。12は分離膜
モジュール2で濃縮された原液を濃縮タンク13に導く
導管であって、途中に一次側の圧力を調整するための第
3のバルブ14が設けられている。One end of a discharge pipe 9 having a pressure accumulator 7 and a second valve 8 is connected to the secondary side of the separation membrane module 2.
The other end communicates with the filtrate tank 10. Reference numeral 12 denotes a conduit that guides the stock solution concentrated in the separation membrane module 2 to the concentration tank 13, and a third valve 14 for adjusting the pressure on the primary side is provided along the way.
前記構成において、前記したように通常運転時から分離
膜を逆洗する場合は、
(1)供給ポンプ3を作動させた状態で第2のバルブ8
を閉鎖する。In the above configuration, when backwashing the separation membrane from normal operation as described above, (1) With the supply pump 3 in operation, the second valve 8
will be closed.
すると排出管9及び蓄圧器7内の圧力(二次側の圧力)
は上昇し、その圧力が供給管4、具体的には供給ポンプ
3と分離膜モジュール2間の供給管4a内の圧力(−次
側の圧力)とほぼバランスする。Then, the pressure inside the discharge pipe 9 and pressure accumulator 7 (pressure on the secondary side)
increases, and the pressure almost balances with the pressure in the supply pipe 4, specifically the pressure in the supply pipe 4a between the supply pump 3 and the separation membrane module 2 (pressure on the negative side).
(2)前記のように二次側の圧力が一次側の圧力とほぼ
バランスした時にリサイクル管5に設けられた第1のバ
ルブ6を開放する。(2) As described above, when the pressure on the secondary side is almost balanced with the pressure on the primary side, the first valve 6 provided in the recycle pipe 5 is opened.
すると供給管4a内、即ち、分離膜モジュール2の一次
側圧力が低下する。Then, the pressure inside the supply pipe 4a, that is, on the primary side of the separation membrane module 2, decreases.
このとき、リサイクル管5の径は供給管4の径より大と
することにより、供給管4aの圧力を急速に低下させる
ことができる。At this time, by making the diameter of the recycling pipe 5 larger than the diameter of the supply pipe 4, the pressure in the supply pipe 4a can be rapidly reduced.
そしてこの状態になると排出管9、即ち、分離膜モジュ
ール2の二次側圧力が一次側の圧力よりも高いため濾液
は分離膜を隔てて逆流することになる。In this state, the pressure on the secondary side of the discharge pipe 9, that is, the separation membrane module 2, is higher than the pressure on the primary side, so that the filtrate flows backward across the separation membrane.
蓄圧器7には第2のバルブ8を閉止した際にほぼ一次側
の圧力に見合う圧力に昇圧されているので、この蓄圧作
用により、分離膜モジュール3を洗浄するのに十分な逆
流時間を保持することができ、その結果、分離膜の一次
側へ付着した固体粒子等を除去することができる。When the second valve 8 is closed, the pressure in the pressure accumulator 7 is increased to a level that corresponds to the pressure on the primary side, so this pressure accumulating action maintains sufficient backflow time to clean the separation membrane module 3. As a result, solid particles and the like attached to the primary side of the separation membrane can be removed.
以上の説明から明らかなように、本発明による分離膜の
逆洗方法によれば、分離膜モジュール2の二次側に特別
な圧力供給手段を設ける必要なく、しかも供給ポンプ3
を停止させることもなく、単に第2のバルブ8を閉鎖し
、第1のバルブ6を開放すると云う極めて簡単な操作に
より分離膜を逆洗することができるという効果がある。As is clear from the above explanation, according to the method for backwashing a separation membrane according to the present invention, there is no need to provide a special pressure supply means on the secondary side of the separation membrane module 2, and the supply pump 3
There is an advantage that the separation membrane can be backwashed by simply closing the second valve 8 and opening the first valve 6, without having to stop the separation membrane.
図は本発明による分離膜の逆洗方法を実施するための分
離装置の系統図である。
■・・・原液タンク 2・・・分離膜モジュール3・
・・供給ポンプ 4・・・供給管5・・・リサイクル
管 6・・・第1のバルブ7・・・蓄圧器 8・
・・第2のバルブ9・・・ 排出管 10・・・濾
液タンク12・・・導管 13・・・濃縮タン
ク14・・・第3のバルブ。The figure is a system diagram of a separation apparatus for carrying out the method for backwashing a separation membrane according to the present invention. ■...Stock solution tank 2...Separation membrane module 3.
... Supply pump 4 ... Supply pipe 5 ... Recycle pipe 6 ... First valve 7 ... Pressure accumulator 8.
... Second valve 9 ... Discharge pipe 10 ... Filtrate tank 12 ... Conduit 13 ... Concentration tank 14 ... Third valve.
Claims (1)
ルに導き、該分離膜モジュールにより分離された濾液を
濾液タンクに導くようにした分離膜装置において、前記
供給ポンプから分離膜モジュールに至る供給管路に、第
1のバルブを有するリサイクル管を連結するとともに、
前記分離膜モジュールから濾液タンクに至る排出管路に
蓄圧器と第2のバルブとを配置し、前記第2のバルブを
閉鎖して、前記供給管路内圧と排出管路内圧とをほぼ均
圧となした後、前記第1のバルブを開放して前記供給管
路内圧を低下させるようにしたことを特徴とする分離膜
の逆洗方法。In a separation membrane device in which the stock solution is guided from the stock solution tank to the separation membrane module by a supply pump, and the filtrate separated by the separation membrane module is guided to the filtrate tank, a supply pipe line from the supply pump to the separation membrane module, connecting a recycling pipe having a first valve;
A pressure accumulator and a second valve are disposed in the discharge pipe leading from the separation membrane module to the filtrate tank, and the second valve is closed to substantially equalize the internal pressure of the supply pipe and the discharge pipe. A method for backwashing a separation membrane, characterized in that the first valve is opened to reduce the internal pressure of the supply pipe.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27743188A JPH02126922A (en) | 1988-11-04 | 1988-11-04 | Back washing method of separating membrane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27743188A JPH02126922A (en) | 1988-11-04 | 1988-11-04 | Back washing method of separating membrane |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02126922A true JPH02126922A (en) | 1990-05-15 |
Family
ID=17583467
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27743188A Pending JPH02126922A (en) | 1988-11-04 | 1988-11-04 | Back washing method of separating membrane |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02126922A (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2677895A1 (en) * | 1991-06-24 | 1992-12-24 | Verseau Dev Sa | Membrane filtration plant with unblocking control |
US5769539A (en) * | 1995-08-07 | 1998-06-23 | Phase Technology | Backflush system for a filter membrane located upstream of a hydrocarbon analyzer apparatus |
US5958243A (en) * | 1996-07-11 | 1999-09-28 | Zenon Environmental Inc. | Apparatus and method for membrane filtration with enhanced net flux |
JP2008525165A (en) * | 2004-12-24 | 2008-07-17 | シーメンス・ウォーター・テクノロジーズ・コーポレーション | Cleaning membrane filtration systems |
WO2009004634A2 (en) * | 2007-07-04 | 2009-01-08 | Israel Water Works Association | Regeneration of a fluid filter controlled by a pressure drop monitor |
US8840783B2 (en) | 2007-05-29 | 2014-09-23 | Evoqua Water Technologies Llc | Water treatment membrane cleaning with pulsed airlift pump |
US8858796B2 (en) | 2005-08-22 | 2014-10-14 | Evoqua Water Technologies Llc | Assembly for water filtration using a tube manifold to minimise backwash |
US8956464B2 (en) | 2009-06-11 | 2015-02-17 | Evoqua Water Technologies Llc | Method of cleaning membranes |
US9022224B2 (en) | 2010-09-24 | 2015-05-05 | Evoqua Water Technologies Llc | Fluid control manifold for membrane filtration system |
US9023206B2 (en) | 2008-07-24 | 2015-05-05 | Evoqua Water Technologies Llc | Frame system for membrane filtration modules |
US9533261B2 (en) | 2012-06-28 | 2017-01-03 | Evoqua Water Technologies Llc | Potting method |
US9604166B2 (en) | 2011-09-30 | 2017-03-28 | Evoqua Water Technologies Llc | Manifold arrangement |
US9675938B2 (en) | 2005-04-29 | 2017-06-13 | Evoqua Water Technologies Llc | Chemical clean for membrane filter |
US9764288B2 (en) | 2007-04-04 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane module protection |
US9764289B2 (en) | 2012-09-26 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane securement device |
US9815027B2 (en) | 2012-09-27 | 2017-11-14 | Evoqua Water Technologies Llc | Gas scouring apparatus for immersed membranes |
US9914097B2 (en) | 2010-04-30 | 2018-03-13 | Evoqua Water Technologies Llc | Fluid flow distribution device |
US9925499B2 (en) | 2011-09-30 | 2018-03-27 | Evoqua Water Technologies Llc | Isolation valve with seal for end cap of a filtration system |
US9962865B2 (en) | 2012-09-26 | 2018-05-08 | Evoqua Water Technologies Llc | Membrane potting methods |
US10322375B2 (en) | 2015-07-14 | 2019-06-18 | Evoqua Water Technologies Llc | Aeration device for filtration system |
US10427102B2 (en) | 2013-10-02 | 2019-10-01 | Evoqua Water Technologies Llc | Method and device for repairing a membrane filtration module |
-
1988
- 1988-11-04 JP JP27743188A patent/JPH02126922A/en active Pending
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2677895A1 (en) * | 1991-06-24 | 1992-12-24 | Verseau Dev Sa | Membrane filtration plant with unblocking control |
US5769539A (en) * | 1995-08-07 | 1998-06-23 | Phase Technology | Backflush system for a filter membrane located upstream of a hydrocarbon analyzer apparatus |
US5958243A (en) * | 1996-07-11 | 1999-09-28 | Zenon Environmental Inc. | Apparatus and method for membrane filtration with enhanced net flux |
JP4763718B2 (en) * | 2004-12-24 | 2011-08-31 | シーメンス・ウォーター・テクノロジーズ・コーポレーション | Cleaning membrane filtration systems |
JP2008525165A (en) * | 2004-12-24 | 2008-07-17 | シーメンス・ウォーター・テクノロジーズ・コーポレーション | Cleaning membrane filtration systems |
US9675938B2 (en) | 2005-04-29 | 2017-06-13 | Evoqua Water Technologies Llc | Chemical clean for membrane filter |
US8858796B2 (en) | 2005-08-22 | 2014-10-14 | Evoqua Water Technologies Llc | Assembly for water filtration using a tube manifold to minimise backwash |
US8894858B1 (en) | 2005-08-22 | 2014-11-25 | Evoqua Water Technologies Llc | Method and assembly for water filtration using a tube manifold to minimize backwash |
US9764288B2 (en) | 2007-04-04 | 2017-09-19 | Evoqua Water Technologies Llc | Membrane module protection |
US9206057B2 (en) | 2007-05-29 | 2015-12-08 | Evoqua Water Technologies Llc | Membrane cleaning with pulsed airlift pump |
US8840783B2 (en) | 2007-05-29 | 2014-09-23 | Evoqua Water Technologies Llc | Water treatment membrane cleaning with pulsed airlift pump |
US9573824B2 (en) | 2007-05-29 | 2017-02-21 | Evoqua Water Technologies Llc | Membrane cleaning with pulsed airlift pump |
US10507431B2 (en) | 2007-05-29 | 2019-12-17 | Evoqua Water Technologies Llc | Membrane cleaning with pulsed airlift pump |
WO2009004634A3 (en) * | 2007-07-04 | 2009-04-30 | Israel Water Works Ass | Regeneration of a fluid filter controlled by a pressure drop monitor |
WO2009004634A2 (en) * | 2007-07-04 | 2009-01-08 | Israel Water Works Association | Regeneration of a fluid filter controlled by a pressure drop monitor |
US9023206B2 (en) | 2008-07-24 | 2015-05-05 | Evoqua Water Technologies Llc | Frame system for membrane filtration modules |
US8956464B2 (en) | 2009-06-11 | 2015-02-17 | Evoqua Water Technologies Llc | Method of cleaning membranes |
US9914097B2 (en) | 2010-04-30 | 2018-03-13 | Evoqua Water Technologies Llc | Fluid flow distribution device |
US10441920B2 (en) | 2010-04-30 | 2019-10-15 | Evoqua Water Technologies Llc | Fluid flow distribution device |
US9022224B2 (en) | 2010-09-24 | 2015-05-05 | Evoqua Water Technologies Llc | Fluid control manifold for membrane filtration system |
US9630147B2 (en) | 2010-09-24 | 2017-04-25 | Evoqua Water Technologies Llc | Fluid control manifold for membrane filtration system |
US9604166B2 (en) | 2011-09-30 | 2017-03-28 | Evoqua Water Technologies Llc | Manifold arrangement |
US9925499B2 (en) | 2011-09-30 | 2018-03-27 | Evoqua Water Technologies Llc | Isolation valve with seal for end cap of a filtration system |
US10391432B2 (en) | 2011-09-30 | 2019-08-27 | Evoqua Water Technologies Llc | Manifold arrangement |
US11065569B2 (en) | 2011-09-30 | 2021-07-20 | Rohm And Haas Electronic Materials Singapore Pte. Ltd. | Manifold arrangement |
US9533261B2 (en) | 2012-06-28 | 2017-01-03 | Evoqua Water Technologies Llc | Potting method |
US9962865B2 (en) | 2012-09-26 | 2018-05-08 | Evoqua Water Technologies Llc | Membrane potting methods |
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