JPH04244290A - Method for circulating and treating washing water - Google Patents
Method for circulating and treating washing waterInfo
- Publication number
- JPH04244290A JPH04244290A JP873991A JP873991A JPH04244290A JP H04244290 A JPH04244290 A JP H04244290A JP 873991 A JP873991 A JP 873991A JP 873991 A JP873991 A JP 873991A JP H04244290 A JPH04244290 A JP H04244290A
- Authority
- JP
- Japan
- Prior art keywords
- washing
- reverse osmosis
- water
- washing water
- osmosis membrane
- 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
- 238000005406 washing Methods 0.000 title claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000012528 membrane Substances 0.000 claims abstract description 45
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 30
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 27
- 239000012510 hollow fiber Substances 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 239000004094 surface-active agent Substances 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 4
- 239000000839 emulsion Substances 0.000 claims description 10
- 238000005238 degreasing Methods 0.000 claims description 7
- 230000004907 flux Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 229920000647 polyepoxide Polymers 0.000 abstract description 2
- 239000004593 Epoxy Substances 0.000 abstract 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 abstract 1
- 239000000565 sealant Substances 0.000 abstract 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 abstract 1
- 239000003599 detergent Substances 0.000 description 8
- 239000012459 cleaning agent Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 3
- 239000004480 active ingredient Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 239000003456 ion exchange resin Substances 0.000 description 3
- 229920003303 ion-exchange polymer Polymers 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000000909 electrodialysis Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000008237 rinsing water Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- -1 alkali metal salts Chemical class 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000011045 prefiltration Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、界面活性剤水溶液、エ
マルジョン洗浄剤、アルカリ洗浄剤等の水系洗浄剤や水
すすぎを必要とする有機溶剤を主体として準水系洗浄剤
による、金属、ガラス、プラスチック、セラミックス等
の脱脂洗浄やプリント基板のはんだフラックス洗浄の水
洗工程の水洗水を処理して水洗工程に戻し、水洗水とし
て循環使用する方法に関するものである。[Industrial Application Field] The present invention is applicable to the cleaning of metals, glass, etc. using semi-aqueous cleaning agents mainly consisting of aqueous cleaning agents such as surfactant aqueous solutions, emulsion cleaning agents, alkaline cleaning agents, and organic solvents that require water rinsing. The present invention relates to a method of treating rinsing water from the rinsing process for degreasing plastics, ceramics, etc. and cleaning solder flux for printed circuit boards, returning it to the rinsing process, and recycling it as rinsing water.
【０００２】0002
【従来の技術】水系洗浄剤または準水系洗浄剤による脱
脂洗浄やフラックス洗浄の水洗工程から排出される水洗
水には、洗浄剤や汚れに由来する界面活性剤、有機溶剤
、油、ロジン、アルカリ金属塩、乳化物等が多量に混入
してくる。この水洗水を循環使用するためには、循環機
構の中で、これらの混入物を除去処理する必要がある。[Prior Art] Washing water discharged from the washing process of degreasing and flux cleaning using aqueous or semi-aqueous detergents contains surfactants, organic solvents, oils, rosins, alkalis, etc. derived from detergents and dirt. A large amount of metal salts, emulsions, etc. are mixed in. In order to reuse this washing water, it is necessary to remove these contaminants in the circulation mechanism.
【０００３】その処理方法として、界面活性剤、油、有
機溶剤、ロジン等の有機成分に対しては、活性炭、活性
汚泥、逆浸透、凝集沈殿等があり、金属イオン、アルカ
リ金属塩等のイオン成分に対しては、イオン交換樹脂、
電気透析、逆浸透等がある。これらのうち、脱脂用洗浄
やフラックス洗浄の水洗工程における水洗水の循環使用
の処理方法を考えた場合、短時間のうちに高度の処理を
行い、水洗水として使用可能なまでに上記混入成分を除
去できること、さらに、処理装置がコンパクトで、洗浄
機の附属設備として簡単に設置可能なことが望まれる。
この観点から見ると、活性汚泥、凝集沈殿は、設備が大
規模であり、処理に時間がかかり、工場全体の廃水を処
理することには向くが、洗浄機単体の水洗水のクローズ
ド化には不向きである。したがって、これらの処理方法
のなかでは、逆浸透、活性炭、イオン交換樹脂、電気透
析を組合せた方法が比較的利用し易いと考えられる。Treatment methods include activated carbon, activated sludge, reverse osmosis, coagulation and precipitation for organic components such as surfactants, oils, organic solvents, and rosin, and ions such as metal ions and alkali metal salts. For the ingredients, ion exchange resin,
Examples include electrodialysis and reverse osmosis. Among these, when considering a treatment method that recycles washing water in the washing process for degreasing and flux cleaning, it performs a high level of treatment in a short period of time and removes the above-mentioned contaminants before it can be used as washing water. It is desired that the treatment equipment be able to be removed, and that the treatment equipment be compact and easily installed as an accessory to a washing machine. From this point of view, activated sludge and coagulation sedimentation require large-scale equipment and take time to process, and are suitable for treating wastewater from an entire factory, but are not suitable for closed-circuit washing water for a single washer. Not suitable. Therefore, among these treatment methods, a method combining reverse osmosis, activated carbon, ion exchange resin, and electrodialysis is considered to be relatively easy to use.
【０００４】さらに、上記処理により水洗水から除去さ
れる界面活性剤、有機溶剤、アルカリ塩等の洗浄剤有効
成分をも再使用することを考慮した場合、逆浸透が有力
である。逆浸透により 有機成分とイオン成分の除去
した水洗水を得ると同時に、洗浄剤成分を濃縮し、これ
を洗浄工程に戻すことが可能となり、洗浄工程を高度に
クローズド化することができる。[0004] Furthermore, when considering the reuse of detergent active ingredients such as surfactants, organic solvents, and alkali salts that are removed from the washing water by the above-mentioned treatment, reverse osmosis is effective. Through reverse osmosis, it is possible to obtain washing water from which organic and ionic components have been removed, while at the same time concentrating the cleaning agent components and returning them to the cleaning process, making the cleaning process highly closed.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、水系洗
浄剤または準水系洗浄剤による脱脂洗浄やフラックス洗
浄から出る水洗水中には、洗浄剤中の界面活性剤やアル
カリによる、油、ロジン等の乳化物が含まれる。これは
洗浄剤成分により乳化した汚れ成分であり、再利用すべ
き洗浄剤成分とは区別すべき不用成分である。[Problems to be Solved by the Invention] However, the washing water from degreasing and flux cleaning using aqueous or semi-aqueous detergents contains emulsions of oil, rosin, etc. due to surfactants and alkalis in the detergent. is included. This is a dirt component that has been emulsified by the detergent component, and is an unnecessary component that should be distinguished from the detergent component that should be reused.
【０００６】この乳化物を含んだ水洗水をこのまま逆浸
透膜処理すれば、必要な洗浄剤成分と共に不用な汚れ成
分まで濃縮するとともに、逆浸透膜への有機物負荷が高
くなり、水洗水として再使用する透過水の有機成分レベ
ルを押し上げたり、逆浸透膜の汚染を早めたりすること
になる。透過水中の有機成分レベルが高いと水洗水とし
て再使用するには好ましくない。また、この濃縮液を洗
浄工程に戻せば、洗浄によって除去した汚れも戻すこと
になり好ましくない。If the washing water containing this emulsion is treated with a reverse osmosis membrane as is, it will concentrate necessary cleaning agent components as well as unnecessary dirt components, and the organic load on the reverse osmosis membrane will increase, making it impossible to reuse it as washing water. This will increase the organic content level of the permeate water used and accelerate the fouling of the reverse osmosis membrane. High levels of organic components in permeate water are undesirable for reuse as wash water. Moreover, if this concentrated liquid is returned to the washing step, the dirt removed by washing will also be returned, which is not preferable.
【０００７】これらの見地から、水洗水中の乳化物を除
去してから逆浸透膜処理することが望まれる。[0007] From these viewpoints, it is desirable to remove emulsions in the washing water before performing reverse osmosis membrane treatment.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、鋭意検討
した結果、中空繊維状の限外濾過膜で限外濾過すること
により、簡単かつコンパクトな装置を用いる方法で、水
洗水中に含まれる乳化物を除去し、逆浸透膜処理による
水洗水の循環使用と洗浄剤有効成分の回収が効果的に可
能となることを見いだし、本発明を完成するに至った。[Means for Solving the Problems] As a result of intensive studies, the present inventors have found that by ultrafiltration with a hollow fiber ultrafiltration membrane, the amount of water contained in washing water can be The present inventors have discovered that it is possible to effectively remove the emulsified substances, circulate the washing water through reverse osmosis membrane treatment, and recover the active ingredients of the detergent, and have completed the present invention.
【０００９】すなわち、本発明は、脱脂洗浄またはフラ
ックス洗浄の水洗工程の、界面活性剤および／またはア
ルカリによる乳化物を含む水洗水を処理して水洗工程に
戻し、循環再使用する方法において、この水洗水を、中
空繊維状の限外濾過膜で限外濾過した後に逆浸透膜処理
し、水洗工程に戻すことを特徴とする水洗水循環処理方
法、および逆浸透膜処理による透過水を水洗工程に戻す
とともに、濃縮水を洗浄工程に戻すことを特徴とする水
洗水循環処理方法である。That is, the present invention provides a method for treating wash water containing an emulsion of a surfactant and/or alkali in the water washing step of degreasing or flux cleaning, returning it to the washing step, and recycling and reusing this water. A washing water circulation treatment method characterized in that washing water is ultrafiltered with a hollow fiber ultrafiltration membrane, then treated with a reverse osmosis membrane, and returned to the washing process, and the permeated water from the reverse osmosis membrane treatment is sent to the washing process. This is a washing water circulation treatment method characterized by returning the concentrated water to the washing process.
【００１０】本発明で用いる中空繊維状の限外濾過膜の
素材は、ポリアクリロニトリル、酢酸セルロース、ポリ
スルホン等の従来の限外濾過に用いられているものを用
いることができる。中空繊維状の限外濾過膜を用いるに
あたっては、大きな濾過膜面積を得るために、この中空
繊維を円筒形の容器の中に多数充填し、中空繊維の両端
が、開口した状態でエポキシ樹脂やポリウレタン樹脂等
のシール材でシールされたものとして用いるのが好まし
い。As the material for the hollow fiber ultrafiltration membrane used in the present invention, those used in conventional ultrafiltration, such as polyacrylonitrile, cellulose acetate, and polysulfone, can be used. When using a hollow fiber ultrafiltration membrane, in order to obtain a large filtration membrane area, a large number of these hollow fibers are filled in a cylindrical container, and both ends of the hollow fibers are left open and filled with epoxy resin. It is preferable to use one sealed with a sealing material such as polyurethane resin.
【００１１】本発明で用いる中空繊維状の限外濾過膜の
膜厚は１０〜４００μｍが好ましく、２０〜１００μｍ
がさらに好ましい。また、中空繊維状の限外濾過膜の内
径は１００〜１０００μｍが好ましく、１００〜４００
μｍがさらに好ましい。また、中空繊維状の限外濾過膜
の分画分子量は、５，０００〜１５，０００が好ましく
、６，０００〜１３，０００がさらに好ましい。さらに
、中空繊維状の限外濾過膜の水の濾過速度は、膜面積１
ｍ２ あたり１０ｌ／ｈ以上あるのが好ましく、１００
ｌ／ｈ以上あるのがさらに好ましい。[0011] The thickness of the hollow fiber ultrafiltration membrane used in the present invention is preferably 10 to 400 μm, and preferably 20 to 100 μm.
is even more preferable. Further, the inner diameter of the hollow fiber ultrafiltration membrane is preferably 100 to 1000 μm, and 100 to 400 μm.
μm is more preferable. Further, the molecular weight cutoff of the hollow fiber ultrafiltration membrane is preferably 5,000 to 15,000, more preferably 6,000 to 13,000. Furthermore, the water filtration rate of a hollow fiber ultrafiltration membrane is
It is preferable that the flow rate is 10 l/h or more per m2, and 100 l/h or more.
It is more preferable that it is 1/h or more.
【００１２】なお、限外濾過の前に、ゴミを除くための
、膜状、わた状、ワインド型等のプレフィルターを置く
ことが好ましい。本発明で用いる中空繊維状の限外濾過
膜については、特開昭４７−５０３９８号公報、特開昭
５７−１３６９０３号公報に開示された方法によって製
造したものを用いることができる。[0012] Before the ultrafiltration, it is preferable to place a pre-filter in the form of a membrane, a cotton, a wind type, etc. to remove dust. As for the hollow fiber ultrafiltration membrane used in the present invention, those manufactured by the methods disclosed in JP-A-47-50398 and JP-A-57-136903 can be used.
【００１３】中空繊維状の限界濾過膜によって限界濾過
された水洗水は、次いで逆浸透膜処理される。逆浸透膜
処理装置としては、通常、洗浄剤有効成分である濃縮液
を溜めるリザーバータンク、逆浸透膜へ水洗水を送るポ
ンプ、および逆浸透膜からなる循環系を構成したものが
用いられる。膜の種類，操作圧力等の条件は、処理する
水洗水の性状、透過液量、回収液量等により、適宜選択
される。[0013] The washing water ultrafiltered through the hollow fiber ultrafiltration membrane is then treated with a reverse osmosis membrane. As a reverse osmosis membrane treatment device, one that usually includes a circulation system consisting of a reservoir tank for storing a concentrated liquid that is an active ingredient of a cleaning agent, a pump that sends washing water to the reverse osmosis membrane, and a reverse osmosis membrane is used. Conditions such as the type of membrane and operating pressure are appropriately selected depending on the properties of the washing water to be treated, the amount of permeated liquid, the amount of recovered liquid, etc.
【００１４】逆浸透膜処理による透過水は水洗工程へ、
濃縮液は洗浄工程へそれぞれ戻され、循環使用される。
なお、逆浸透膜処理して得られる透過水を、さらに、活
性炭やイオン交換樹脂で処理して、高度に精製した水洗
水として再使用することも可能である。[0014] The permeated water from the reverse osmosis membrane treatment is sent to a washing process,
The concentrates are each returned to the washing process and used for circulation. Note that it is also possible to further treat the permeated water obtained by reverse osmosis membrane treatment with activated carbon or ion exchange resin and reuse it as highly purified washing water.
【００１５】[0015]
【実施例】以下、実施例により、本発明を具体的に説明
する。[Examples] The present invention will be specifically explained below with reference to Examples.
【００１６】[0016]
【実施例１〜５および比較例】炭酸ソーダ、ケイ酸ソー
ダ、界面活性剤、油、ロジンを含む水洗水モデル液（透
過率４４％、ＣＯＤ６４０ｐｐｍ）を、表２に示す中空
繊維状の限外濾過膜Ａ〜Ｅで限外濾過し、ついで、合成
高分子系の逆浸透膜（日東電工（株）製、商品名：ＮＴ
Ｒ−７１９７）で処理（操作圧力３０ｋｇ／ｃｍ２ ）
した。限外濾過後の水洗水の透過率およびＣＯＤ、逆浸
透膜処理後の水洗水の透過率およびＣＯＤを測定した。
その結果を表１に示す。[Examples 1 to 5 and Comparative Examples] A washing water model solution (transmittance 44%, COD 640 ppm) containing soda carbonate, sodium silicate, surfactant, oil, and rosin was used to form hollow fiber-like ultraviolet particles shown in Table 2. Ultrafiltration is performed using filtration membranes A to E, and then a synthetic polymer reverse osmosis membrane (manufactured by Nitto Denko Corporation, product name: NT
R-7197) (operating pressure 30 kg/cm2)
did. The permeability and COD of the washing water after ultrafiltration and the permeability and COD of the washing water after reverse osmosis membrane treatment were measured. The results are shown in Table 1.
【００１７】比較のため限外濾過しない場合についても
実施した。その結果を表１に示す。また、逆浸透膜処理
による濃縮液を用いた洗浄試験結果を表３に示す。なお
、上記透過率は、可視吸光計で５５０ｎｍにて測定した
値で、この数値が大きいほど乳化物の量が少ないことを
示し、透過率１００％は乳化物が見られないことを示す
。また、ＣＯＤは、ＪＩＳ−Ｋ０１０２（１９８６）に
記載の方法により測定した値で、この数値が小さいほど
有機物の量が少ないことを示す。さらに、導電率は、電
気化学計器製導電率計ＡＯＬ−４０で測定した値である
。For comparison, a test was also carried out without ultrafiltration. The results are shown in Table 1. Further, Table 3 shows the results of a cleaning test using a concentrated solution treated with a reverse osmosis membrane. The above transmittance is a value measured at 550 nm using a visible absorption spectrometer, and the larger the value, the smaller the amount of emulsion, and the transmittance of 100% indicates that no emulsion is observed. Moreover, COD is a value measured by the method described in JIS-K0102 (1986), and the smaller the value, the smaller the amount of organic matter. Furthermore, the conductivity is a value measured with a conductivity meter AOL-40 manufactured by Electrochemical Keiki.
【００１８】以上の水洗水循環フローの１形態を図１に
示した。One form of the above-mentioned washing water circulation flow is shown in FIG.
【００１９】[0019]
【表１】[Table 1]
【００２０】[0020]
【表２】[Table 2]
【００２１】[0021]
【表３】[Table 3]
【００２２】[0022]
【発明の効果】本発明は、簡単な方法で、逆浸透膜への
有機物負荷を大幅に低減することができ、透過水の有機
物レベルをも低減し、良質な水洗水を再生利用できる。
また、得られた濃縮液は洗浄液として再使用可能なもの
となり、水洗水の再利用とあわせて、水洗工程を高度に
クローズド化できる。Effects of the Invention The present invention can significantly reduce the load of organic matter on a reverse osmosis membrane by a simple method, and also reduce the level of organic matter in permeated water, allowing high-quality washing water to be recycled. In addition, the obtained concentrated liquid can be reused as a cleaning liquid, and in addition to reusing the washing water, the washing process can be made highly closed.
【図１】図１は、本発明の水洗水処理方法の１実施態様
を示したものである。FIG. 1 shows one embodiment of the washing water treatment method of the present invention.
１ 中空繊維状の限外濾過膜を用いた限外濾過器２
逆浸透膜処理装置
３ 洗浄槽
４ 水洗槽
５ 水洗水循環経路
６ 濃縮液返送経路1 Ultrafilter using hollow fiber ultrafiltration membrane 2
Reverse osmosis membrane treatment device 3 Washing tank 4 Washing tank 5 Washing water circulation path 6 Concentrate return path
Claims (2)
工程の、界面活性剤および／またはアルカリによる乳化
物を含む水洗水を処理して水洗工程に戻し、循環再使用
する方法において、この水洗水を、中空繊維状の限外濾
過膜で限外濾過した後に逆浸透膜処理し、水洗工程に戻
すことを特徴とする水洗水循環処理方法。Claim 1. A method in which wash water containing an emulsion of a surfactant and/or alkali in a washing step of degreasing or flux cleaning is treated and returned to the washing step for circulation and reuse, comprising: A washing water circulation treatment method characterized in that after ultrafiltration with a hollow fiber ultrafiltration membrane, the water is subjected to reverse osmosis membrane treatment and returned to the washing process.
工程の、界面活性剤および／またはアルカリによる乳化
物を含む水洗水を処理して水洗工程に戻し、循環再使用
する方法において、この水洗水を、中空繊維状の限外濾
過膜で限外濾過した後に逆浸透膜処理し、透過水を水洗
工程に戻すとともに、濃縮水を洗浄工程に戻すことを特
徴とする水洗水循環処理方法。2. A method in which the washing water containing an emulsion of a surfactant and/or alkali in the washing step of degreasing or flux cleaning is treated and returned to the washing step for circulation and reuse, wherein the washing water is A washing water circulation treatment method characterized by ultrafiltration using a hollow fiber ultrafiltration membrane followed by reverse osmosis membrane treatment, returning permeated water to the washing process, and returning concentrated water to the washing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03008739A JP3128250B2 (en) | 1991-01-28 | 1991-01-28 | Rinse water circulation treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03008739A JP3128250B2 (en) | 1991-01-28 | 1991-01-28 | Rinse water circulation treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04244290A true JPH04244290A (en) | 1992-09-01 |
| JP3128250B2 JP3128250B2 (en) | 2001-01-29 |
Family
ID=11701318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03008739A Expired - Fee Related JP3128250B2 (en) | 1991-01-28 | 1991-01-28 | Rinse water circulation treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3128250B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0590769A1 (en) * | 1992-09-30 | 1994-04-06 | Petrolite Corporation | Method for removal of water soluble organics from oil process water |
| KR20010079372A (en) * | 2001-07-10 | 2001-08-22 | 홍진의 | Method for reuse of wastewater from semiconductor sawing process |
| KR100489438B1 (en) * | 2002-08-22 | 2005-05-12 | 임범관 | Method for treating waste water generated in a semiconductor manufacturing process |
| CN107445319A (en) * | 2017-08-10 | 2017-12-08 | 国网河南省电力公司电力科学研究院 | A kind of retired composite insulator cleaning sullage processing system and method |
| CN110699886A (en) * | 2019-09-25 | 2020-01-17 | 河北蓝荷水务有限公司 | Liquid caustic soda recovery system and method |
-
1991
- 1991-01-28 JP JP03008739A patent/JP3128250B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0590769A1 (en) * | 1992-09-30 | 1994-04-06 | Petrolite Corporation | Method for removal of water soluble organics from oil process water |
| KR20010079372A (en) * | 2001-07-10 | 2001-08-22 | 홍진의 | Method for reuse of wastewater from semiconductor sawing process |
| KR100489438B1 (en) * | 2002-08-22 | 2005-05-12 | 임범관 | Method for treating waste water generated in a semiconductor manufacturing process |
| CN107445319A (en) * | 2017-08-10 | 2017-12-08 | 国网河南省电力公司电力科学研究院 | A kind of retired composite insulator cleaning sullage processing system and method |
| CN110699886A (en) * | 2019-09-25 | 2020-01-17 | 河北蓝荷水务有限公司 | Liquid caustic soda recovery system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3128250B2 (en) | 2001-01-29 |
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