JPH02280802A - Recovery of low boiling point solvent - Google Patents
Recovery of low boiling point solventInfo
- Publication number
- JPH02280802A JPH02280802A JP1103072A JP10307289A JPH02280802A JP H02280802 A JPH02280802 A JP H02280802A JP 1103072 A JP1103072 A JP 1103072A JP 10307289 A JP10307289 A JP 10307289A JP H02280802 A JPH02280802 A JP H02280802A
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- low
- boiling point
- discharged
- low boiling
- 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
- 239000002904 solvent Substances 0.000 title claims abstract description 76
- 238000009835 boiling Methods 0.000 title claims description 25
- 238000011084 recovery Methods 0.000 title claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000005273 aeration Methods 0.000 claims abstract description 27
- 238000004140 cleaning Methods 0.000 claims abstract description 22
- 239000002699 waste material Substances 0.000 claims abstract description 17
- 238000004821 distillation Methods 0.000 claims abstract description 12
- 239000003463 adsorbent Substances 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 31
- 238000005406 washing Methods 0.000 claims description 25
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000010734 process oil Substances 0.000 claims description 9
- 238000001179 sorption measurement Methods 0.000 claims description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 238000001704 evaporation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 14
- AJDIZQLSFPQPEY-UHFFFAOYSA-N 1,1,2-Trichlorotrifluoroethane Chemical compound FC(F)(Cl)C(F)(Cl)Cl AJDIZQLSFPQPEY-UHFFFAOYSA-N 0.000 description 13
- 238000004817 gas chromatography Methods 0.000 description 8
- 238000002336 sorption--desorption measurement Methods 0.000 description 6
- 239000002440 industrial waste Substances 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- ZXPCCXXSNUIVNK-UHFFFAOYSA-N 1,1,1,2,3-pentachloropropane Chemical compound ClCC(Cl)C(Cl)(Cl)Cl ZXPCCXXSNUIVNK-UHFFFAOYSA-N 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010730 cutting oil Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- FDSGHYHRLSWSLQ-UHFFFAOYSA-N dichloromethane;propan-2-one Chemical compound ClCCl.CC(C)=O FDSGHYHRLSWSLQ-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- -1 fluorocarbons 113 Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 231100001252 long-term toxicity Toxicity 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000008693 nausea Effects 0.000 description 1
- NBJBFKVCPBJQMR-APKOLTMOSA-N nff 1 Chemical compound C([C@H](NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@@H]1CCCN1C(=O)[C@H](CCCCN)NC(=O)[C@@H]1CCCN1C(=O)CC=1C2=CC=C(C=C2OC(=O)C=1)OC)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)NCC(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCCNC=1C(=CC(=CC=1)[N+]([O-])=O)[N+]([O-])=O)C(=O)NCC(O)=O)C1=CC=CC=C1 NBJBFKVCPBJQMR-APKOLTMOSA-N 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Treating Waste Gases (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電子部品、電機部品、精密機械部品等の洗浄
液、プリント基板の剥離液、現像液、樹脂加工部品の充
填液等として使用された結果、工程油、樹脂等を含む状
態で排出された低沸点溶剤、特にフロン１１２、フロン
１１３．１．１．１．−トリクロロエタン、］・］リク
ロロエチレン、塩化メチレンアセトン、アルコール類、
メヂルエチルケトン等の溶剤の回収方法に関するもので
ある。[Detailed Description of the Invention] [Field of Industrial Application] The present invention can be used as a cleaning liquid for electronic parts, electrical machinery parts, precision mechanical parts, etc., a stripping liquid for printed circuit boards, a developer, a filling liquid for resin-processed parts, etc. As a result, low boiling point solvents were discharged containing process oils, resins, etc., especially Freon 112, Freon 113.1.1.1. -trichloroethane, ]・]lichloroethylene, methylene chloride acetone, alcohols,
This invention relates to a method for recovering solvents such as methyl ethyl ketone.
本発明は、これらの洗浄等に使用された低沸点溶剤を、
高品位で回収するとともに、大気中に放出される、又は
、産業廃棄物として処理されるこれら溶剤の濃度を低下
させることができる。The present invention removes the low boiling point solvent used for these cleanings, etc.
It is possible to recover high quality and reduce the concentration of these solvents that are released into the atmosphere or disposed of as industrial waste.
（従来技術とその問題点）
低沸点溶剤、特にフロン類は幅広い用途で利用され、そ
の関連製品は日常生活のすみずみまで浸透している。(Prior art and its problems) Low boiling point solvents, especially fluorocarbons, are used in a wide range of applications, and related products have permeated every corner of daily life.
しかしながら、水素を含まないフロン類、すなわちフロ
ン１１３、フロン１１、フロン１２等の大気中への放出
は、オゾン層を破壊から保護するために、その規制が強
く求められている。However, there is a strong need to regulate the release of fluorocarbons that do not contain hydrogen, such as fluorocarbons 113, 11, and 12, into the atmosphere in order to protect the ozone layer from destruction.
これらのフロン類は電子部品、電機部品等の洗浄・乾燥
・樹脂充填等に広く使用されながら、その特性から回収
されず、多くが大気中に放出されているのが現状である
。しかも、現在のところ有効な代替品は長期毒性検査の
段階にあり実用化されていない。Although these fluorocarbons are widely used for cleaning, drying, and resin filling of electronic and electrical parts, etc., due to their characteristics, most of them are not recovered and are currently released into the atmosphere. Moreover, effective substitutes are currently in the stage of long-term toxicity testing and have not been put into practical use.
従来、前記したような低沸点溶剤（ＬＡ下溶剤という）
を用いた洗浄機等から排出される溶剤の第１のものは、
機能時にガス化し、洗浄機等からガス状態で排出される
もので、これは活性炭等の吸着剤を用いて回収すること
ができる。Conventionally, low boiling point solvents (referred to as LA lower solvents) such as those mentioned above have been used.
The first type of solvent discharged from washing machines etc. using
It is gasified during its function and is discharged from a washing machine or the like in a gaseous state, which can be recovered using an adsorbent such as activated carbon.
しかしながら、洗浄機等の構造により、気化した溶剤を
局所吸引ダクトにより回収する形式のものでは、多くは
回収されず、大気中に放出されてしまう。However, due to the structure of the cleaning machine or the like, if the vaporized solvent is recovered by a local suction duct, much of the solvent is not recovered and is released into the atmosphere.
第２のものは、工程油、樹脂等を含む用済み溶剤として
液状で洗浄機等から排出される。通常の洗浄機等には、
蒸溜機が併設され用済みの溶剤を蒸溜して再使用するが
、回収効率が低く、回収効率を高めようとすると回収溶
剤の純度が低くなるという問題がある。The second one is discharged from a washing machine or the like in liquid form as a used solvent containing process oil, resin, etc. For normal washing machines,
A distillation machine is attached to distill the used solvent and reuse it, but the recovery efficiency is low, and if you try to increase the recovery efficiency, the purity of the recovered solvent will be low.
このため、蒸溜残渣には相当量の溶剤を含んだまま産業
廃棄物として処理されるのが実状である。例えば、フロ
ン１１３と切削油との混合系の廃液を８５℃で蒸溜した
あとの残漬には約４０％のフロン１１３が残存しており
、このまま産業廃棄物として処理され、結果的に環境汚
染の原因となっている。For this reason, the reality is that the distillation residue is disposed of as industrial waste while still containing a considerable amount of solvent. For example, after distilling waste liquid of a mixture of Freon 113 and cutting oil at 85°C, approximately 40% of Freon 113 remains, which is disposed of as industrial waste, resulting in environmental pollution. It is the cause of
（発明の目的）
本発明は、このように−旦使用された溶剤、特にフロン
類を有効に回収するとともに、環境汚染を防止すること
を目的とするものである。(Objective of the Invention) The object of the present invention is to effectively recover used solvents, especially fluorocarbons, and to prevent environmental pollution.
（１）電子部品、電機部品、精密機械部品等の洗浄等に
使用され、洗浄機等から排出された工程油、樹脂等を含
む低沸点溶剤含有排出液を曝気処理して生じた低沸点溶
剤含有ガス（Ａ）と、該洗浄機等から排出されたままの
低沸点溶剤含有ガス（Ｂ）とを、ガス状態のまま活性炭
を吸着材とした回収装置に供給し、低沸点溶剤を活性炭
に吸着させて回収することを特徴とする低沸点溶剤の回
収方法。(1) Low boiling point solvent used for cleaning electronic parts, electrical machinery parts, precision machine parts, etc. and produced by aeration treatment of low boiling point solvent-containing waste liquid containing process oil, resin, etc. discharged from washing machines etc. The contained gas (A) and the low-boiling solvent-containing gas (B) discharged from the washing machine etc. are supplied in gaseous state to a recovery device using activated carbon as an adsorbent, and the low-boiling solvent is transferred to the activated carbon. A method for recovering a low boiling point solvent, which is characterized by recovery by adsorption.
（２）■程油、樹脂等を含む低沸点溶剤含有排出液を、
予め蒸溜に付して低沸点溶剤を回収した後、曝気処理に
付することを特徴とする請求項（１）記載の回収方法。(2) ■Discharge the effluent containing low boiling point solvents including oil, resin, etc.
2. The recovery method according to claim 1, wherein the low boiling point solvent is recovered by distillation in advance and then subjected to aeration treatment.
本発明は、電子部品、ｆｔｌｌｆｉ部品、精密機械部品
等の洗浄液、プリント基板の剥離液、現像液、樹脂加工
部品の充填液等として使用された結果、工程油、樹脂等
を含む状態で排出された低沸点溶剤溶液に適用され、本
発明によると、低沸点溶剤、特にフロン類について有効
な回収が可能であり、その結果、大気中に放出される、
及び、地中に浸透される溶剤の量を極めて低くすること
ができる。The present invention is used as a cleaning liquid for electronic parts, ftllfi parts, precision mechanical parts, etc., a stripping liquid for printed circuit boards, a developer, a filling liquid for resin processed parts, etc., and as a result, it is discharged in a state containing process oil, resin, etc. According to the present invention, it is possible to effectively recover low-boiling solvents, especially fluorocarbons, which are released into the atmosphere.
And, the amount of solvent infiltrated into the ground can be extremely low.
従来、洗浄機等から排出された使用済み廃液には工程油
、樹脂等を含むが、この廃液を併設された蒸溜機にて加
熱し溶剤を蒸発させ、これを冷却して溶剤を回収すると
、溶剤の濃度が低くなるにつれて、廃液の温度が上昇し
、回収溶剤に工程油、樹脂等を多く含み、品位が低下す
るばかりでなく、回収効率が低く、しかも廃液中に含ま
れる溶剤の量も多く大気中に放出される溶剤のけも多く
なる。本発明方法によると、従来技術の欠点が数段され
、高品位の溶剤が回収できるとともに、環境汚染を防止
することができる。Conventionally, used waste liquid discharged from washing machines, etc. contains process oil, resin, etc., but if this waste liquid is heated in an attached distillation machine to evaporate the solvent, and then cooled to recover the solvent, As the concentration of the solvent decreases, the temperature of the waste liquid increases, and the recovered solvent contains a large amount of process oil, resin, etc., which not only lowers the quality but also lowers the recovery efficiency and increases the amount of solvent contained in the waste liquid. This also increases the amount of solvent released into the atmosphere. According to the method of the present invention, the drawbacks of the prior art can be overcome to a large extent, high-quality solvent can be recovered, and environmental pollution can be prevented.
ン１１３．１．ｉ、ｉ、−ｔ−リクＯロエタン、トリク
ロロエチレン、塩化メチレン、アセトン、アルコール類
、メチルエヂルケトン等又はこれらの混合物である。113.1. i, i, -t-licroethane, trichloroethylene, methylene chloride, acetone, alcohols, methyl edyl ketone, etc., or mixtures thereof.
本発明を図面によって説明づる。The present invention will be explained with reference to the drawings.
第１図、第２図は、洗浄機に本発明を適用した場合のフ
ローシートを示したものであり、第１図は、蒸溜機の併
設された洗浄機、第２図は蒸溜機の併設されていない洗
浄機について示したものである。Figures 1 and 2 show flow sheets when the present invention is applied to a washing machine. This is an example of a washing machine that has not been installed.
第１図及び第２図において、１は洗浄機、２−１〜２−
Ｘは洗浄機内に配設された洗浄液槽、３は洗浄液移送管
、４は被洗浄物搬送ルート、５は川魚溜器、６は曝気槽
、１は活性炭吸脱着装置、７−１へ・７−２は吸脱稠塔
−をそれぞれ示す。In Figures 1 and 2, 1 is a washing machine, 2-1 to 2-
X is a cleaning liquid tank installed in the cleaning machine, 3 is a cleaning liquid transfer pipe, 4 is a route for transporting objects to be cleaned, 5 is a river fish tank, 6 is an aeration tank, 1 is an activated carbon adsorption/desorption device, and to 7-1. 7-2 indicates an adsorption/desorption tower, respectively.
第１図において、洗浄機１内に搬送された被洗浄物は洗
浄ルート４に従って、複数の洗浄槽２−１〜２−Ｘに順
次送られ、洗浄された後、洗浄機外に搬出される。In FIG. 1, the objects to be cleaned that have been transported into the washing machine 1 are sequentially sent to a plurality of washing tanks 2-1 to 2-X according to the washing route 4, and after being washed, are carried out of the washing machine. .
洗浄液は被洗浄物とは、逆の方向から供給され洗浄槽２
−Ｘ〜２−１を順次送液される。The cleaning liquid is supplied from the opposite direction to the object to be cleaned, and the cleaning liquid is supplied to the cleaning tank 2.
-X to 2-1 are sequentially fed.
洗浄槽２−１から排出された溶剤は移送管３によって川
魚溜器５に入り、ここで単蒸溜され、溶剤は洗浄槽２−
Ｘに戻され再使用される。洗浄槽２−Ｘには不足分の゛
溶剤が新たに加えられる。The solvent discharged from the cleaning tank 2-1 enters the river fish tank 5 through the transfer pipe 3, where it is single-distilled, and the solvent is transferred to the cleaning tank 2-1.
Returned to X and reused. The insufficient amount of solvent is newly added to the cleaning tank 2-X.
川魚溜器から排出された低濃度の溶剤を含む廃液は、曝
気槽６に移送され曝気処理がされる。The waste liquid containing a low concentration of solvent discharged from the river fish tank is transferred to the aeration tank 6 and subjected to aeration treatment.
曝気処理された後の液は廃棄される。The liquid after the aeration treatment is discarded.
一方、洗浄槽から蒸発したガス状の溶剤は槽上の蒸気ラ
インより下にあるが、被洗浄物の出し入れにより蒸気ラ
インが上昇し、又は、蒸気槽が攪拌され溶剤のガスの一
部は洗浄器から排気管を通し系外に排気される。このよ
うにして洗浄機から排出された溶剤を含むガスは、ガス
ｍ度が低く、冷却等によって溶剤を捕捉することが困難
である。たとえ一部を捕捉し得たとしても、蒸気正分の
溶剤は含まれる。On the other hand, the gaseous solvent evaporated from the cleaning tank is below the steam line above the tank, but as the items to be cleaned are taken in and out, the steam line rises or the steam tank is agitated and some of the solvent gas is washed away. It is exhausted from the system through the exhaust pipe. The gas containing the solvent discharged from the washer in this manner has a low gas temperature, and it is difficult to capture the solvent by cooling or the like. Even if some of it can be captured, a vaporous fraction of the solvent will be included.
他方、曝気により気化した溶剤は、空気等の曝気ガスと
の混合物として曝気槽６から排出される。曝気槽６から
排出された混合ガスは工程油などのオイルミストを含む
可能性があるので、ミストキャッチャ−を通すことが好
ましい。On the other hand, the solvent vaporized by aeration is discharged from the aeration tank 6 as a mixture with an aeration gas such as air. Since the mixed gas discharged from the aeration tank 6 may contain oil mist such as process oil, it is preferable to pass it through a mist catcher.
効果を有するものとして、壁面を流下させながら脱気す
る、いわゆる濡れ壁塔形式のものも使用できるが、気・
液の接触効率、装置の単純化の観点から嘔気方式が好ま
しい。As an effective device, a so-called wet wall tower type that deaerates while flowing down the wall surface can also be used, but the
The nausea method is preferable from the viewpoint of liquid contact efficiency and equipment simplification.
これら、洗浄機１及び曝気槽６から排出されたガス状洗
浄液を含む混合ガスは、溶剤含有率が低いため、冷却等
によって溶剤を混合ガス中から分離することはできない
。しかし、この両者を活性炭を吸着材とする吸脱着装置
７に供給することにより吸着される。Since the mixed gas containing the gaseous cleaning liquid discharged from the cleaning machine 1 and the aeration tank 6 has a low solvent content, the solvent cannot be separated from the mixed gas by cooling or the like. However, both of them are adsorbed by supplying them to an adsorption/desorption device 7 that uses activated carbon as an adsorbent.
活性炭としては、通常の粒状活性炭、粉状活性炭、ｍ紐
状活性炭等特に制限されることなく利用される。As the activated carbon, ordinary granular activated carbon, powdered activated carbon, m-string activated carbon, etc. can be used without particular limitation.
吸脱着装置としては、以に知られているものが使用でき
る。活性炭層に吸着された溶剤は既知の方法、例えば水
蒸気を用いて脱着し回収されるが、加熱空気による脱着
は、回収効率を低下するので好ましくない。As the adsorption/desorption device, the following known devices can be used. The solvent adsorbed on the activated carbon layer can be desorbed and recovered using a known method, for example, using steam, but desorption using heated air is not preferred because it reduces the recovery efficiency.
第２図は、蒸溜機が併設されていない洗ｆｐ橢を例示し
たフローシートを示しＩｃものである。FIG. 2 shows a flow sheet illustrating a washing fp washing machine without a distillation machine.
第２図に示した方法においては、洗浄機から排出された
使用済み溶剤を、直接曝気槽に移され、曝気処理される
以外は、第１図と同じである。The method shown in FIG. 2 is the same as that in FIG. 1 except that the used solvent discharged from the washer is directly transferred to an aeration tank and subjected to aeration treatment.
（実施例）
実施例１
フロン１１３（沸点： ４７．５７℃、密度１．５６５
ｇ／ｃｃ（２５℃）〕を溶剤とし使用して、アルミニウ
ム製エアコン部品を洗浄した。(Example) Example 1 Freon 113 (boiling point: 47.57°C, density 1.565
g/cc (25° C.)] was used as a solvent to clean aluminum air conditioner parts.
洗浄機から排出された使用済み溶剤液を８５℃に設定さ
れた蒸溜器で単蒸溜し残渣を取り出した。The used solvent solution discharged from the washer was single-distilled in a distiller set at 85° C., and the residue was taken out.
この洗浄機では、このときの蒸溜残渣は３日間に１度、
２００リツターが排出され、この蒸溜残漬には、フロン
１１３が４０．１Ｍ１％含まれていた。With this washing machine, the distillation residue is removed once every three days.
200 liters were discharged, and this distillation residue contained 40.1M1% of Freon 113.
この蒸溜残渣１０リッターを曝気槽に移し、常温下で曝
気した。10 liters of this distillation residue was transferred to an aeration tank and aerated at room temperature.
空気は１．１ｍ ” ／時間とし、８時間曝気した。The air flow rate was 1.1 m''/hour, and aeration was carried out for 8 hours.
その結果、曝気処理後の残漬のフロン１１３含有聞は、
１．７容量％であり、蒸溜残漬に含まれていた約９６％
のフロン１１３が蒸溜残清から除去されたことになる。As a result, the content of CFC-113 in the residue after aeration treatment was as follows:
1.7% by volume, approximately 96% contained in distillation residue
This means that CFC 113 has been removed from the distillation residue.
溶剤を含む曝気ガスと、洗浄機から排気されたガスとを
、粒状活性炭と繊維状活性炭とを組合Ｉた吸脱着装置に
供給し溶剤を活性炭で捕捉した。The aeration gas containing the solvent and the gas exhausted from the washer were supplied to an adsorption/desorption device consisting of a combination of granular activated carbon and fibrous activated carbon, and the solvent was captured by the activated carbon.
活性炭層を通過したガスに含まれるフロン１１３は、５
７０ｐｐ−であった。Freon 113 contained in the gas that has passed through the activated carbon layer is 5
It was 70 pp-.
この活性炭層から水蒸気にてフロン１１３を脱着し、フ
ロン１１３を回収した。この回収フロン１１３のガスク
ロマトグラフィー〔（株）日立製作新製〕のチャートは
第３図に示した通りであり、第４図に示したフロン１１
３のスタンダードのガスクロマトグラフィーのチャート
と対比しても差はなく、純度は高く洗ｆｆ１１１１にて
再使用された。Freon 113 was desorbed from this activated carbon layer using steam, and Freon 113 was recovered. The gas chromatography chart (manufactured by Hitachi Seisakusho, Ltd.) of this recovered fluorocarbon 113 is as shown in Figure 3, and the fluorocarbon 11 shown in Figure 4 is
Even when compared with the standard gas chromatography chart of No. 3, there was no difference, and the purity was high and it was reused in washing ff1111.
一方、曝気槽から排出された曝気後の廃液のガスクロマ
トグラフィーのチャートは第５図の通りであり、曝気処
理前の廃液のガスクロマトグラフィーのチャートである
第６図に比較しフロン１１３の含ｎｆｆ１は極めて少な
かった。On the other hand, the gas chromatography chart of the aerated waste liquid discharged from the aeration tank is as shown in Figure 5, and compared to Figure 6, which is the gas chromatography chart of the waste liquid before aeration treatment, it contains less Freon 113. nff1 was extremely low.
以上の通り、熱温残渣は、そのまま産業廃棄物として廃
棄する場合に比較し環境汚染に与える１マゝ
影ｗ、ｋｉ′極めて軽微なものとなる。As mentioned above, the thermal and thermal residues have an extremely small impact on environmental pollution by 1 micron w,ki' compared to when they are disposed of as industrial waste.
（発明の効果） 本発明によると下記の効果が得られる。(Effect of the invention) According to the present invention, the following effects can be obtained.
■ 洗浄機等の排出ガス、排出液中の低沸点溶剤を総合
的に回収し、しかも大気中に放出される、又は、産業廃
棄物として廃棄される残漬中に含まれるところのこれら
の低沸点溶媒の１１度を低下することができる。特に廃
棄される残渣に含まれる低沸点溶剤を回収するのに効果
的である。■ Comprehensive recovery of low-boiling point solvents in exhaust gases and discharged liquids from cleaning machines, etc., and in addition to recovering these low-boiling solvents that are released into the atmosphere or contained in residual waste disposed of as industrial waste. The boiling point of the solvent can be lowered by 11 degrees. It is particularly effective for recovering low-boiling point solvents contained in waste residues.
■ 廃液中の残存溶剤を簡便な方法で効率よく、且つ高
純度で回収できる。■ Remaining solvent in waste liquid can be recovered efficiently and with high purity using a simple method.
■ 一般には常温で処理できるため、加熱するためのエ
ネルギーコストがかからず、加熱による溶剤の変質もな
く、高品位の溶剤を回収することができる。■ Since it can generally be processed at room temperature, there is no energy cost for heating, there is no deterioration in the quality of the solvent due to heating, and high-quality solvents can be recovered.
■ 局所吸引ダクトによらず、溶剤槽全体を密閉室内に
配置し、該室内のガスを総合的に補集することにより、
排出される使用済み溶剤の回収と相俟って、投入溶剤の
９０％以上を回収することができる。■ By placing the entire solvent tank in a sealed chamber and collecting the gas in the chamber comprehensively, without relying on local suction ducts,
Together with the recovery of the used solvent that is discharged, more than 90% of the input solvent can be recovered.
第１図及び第２図は、洗浄機に本発明を適用した場合の
フローシートを例示したものである。
第３図は、本発明によって回収されたフロン１１３のガ
スクロマトグラフィーのチャートを示したものである。
第４図は、フロン１１３の標準ガスクロマトグラフィー
のチ１シートを示したものである。
第５図、本発明による曝気処理後の廃液のガスクロマト
グラフィーのチャートを示したものである。
第６図は、曝気処理前の廃液のガスクロマトグラフィー
のチャートを示したものである。
第１図及び第２図における符号の説明
１：洗浄機、２−１〜２−ｘ：洗浄機内に配設された洗
浄液槽、３：洗浄液移送管、４：被洗浄物搬送ルート、
５：車前溜器、６：＠気槽、１：活性炭吸脱着装置、７
−１〜７−２：吸脱＠基筒３図
第４
特許出願人 東邦花工臆！！１１ｓＩ式会社代理人弁
理士 土 居 三 部
第
図
第
図FIG. 1 and FIG. 2 illustrate a flow sheet when the present invention is applied to a washing machine. FIG. 3 shows a gas chromatography chart of Freon 113 recovered according to the present invention. FIG. 4 shows a standard gas chromatography sheet of Freon 113. FIG. 5 shows a gas chromatography chart of the waste liquid after the aeration treatment according to the present invention. FIG. 6 shows a gas chromatography chart of the waste liquid before aeration treatment. Explanation of symbols in FIGS. 1 and 2 1: Washing machine, 2-1 to 2-x: Washing liquid tank disposed in the washing machine, 3: Washing liquid transfer pipe, 4: Transport route for objects to be cleaned,
5: Front reservoir, 6: @Air tank, 1: Activated carbon adsorption/desorption device, 7
-1 to 7-2: Suction/extraction @Base tube 3 Figure 4 Patent applicant Toho Flower Industry Co., Ltd. ! 11sI type company representative patent attorney Doi Part 3 Figure Figure
Claims (2)
使用され、洗浄機等から排出された工程油、樹脂等を含
む低沸点溶剤含有排出液を曝気処理して生じた低沸点溶
剤含有ガス（Ａ）と、該洗浄機等から排出されたままの
低沸点溶剤含有ガス（Ｂ）とを、ガス状態のまま活性炭
を吸着材とした回収装置に供給し、低沸点溶剤を活性炭
に吸着させて回収することを特徴とする低沸点溶剤の回
収方法。(1) Low boiling point solvent used for cleaning electronic parts, electrical machinery parts, precision machine parts, etc. and produced by aeration treatment of low boiling point solvent-containing waste liquid containing process oil, resin, etc. discharged from washing machines etc. The contained gas (A) and the low-boiling solvent-containing gas (B) discharged from the washing machine etc. are supplied in gaseous state to a recovery device using activated carbon as an adsorbent, and the low-boiling solvent is transferred to the activated carbon. A method for recovering a low boiling point solvent, which is characterized by recovery by adsorption.
予め蒸溜に付して低沸点溶剤を回収した後、曝気処理に
付することを特徴とする請求項（１）記載の回収方法。(2) Discharge liquid containing low boiling point solvents including process oil, resin, etc.
2. The recovery method according to claim 1, wherein the low boiling point solvent is recovered by distillation in advance and then subjected to aeration treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1103072A JPH084682B2 (en) | 1989-04-21 | 1989-04-21 | Low boiling point solvent recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1103072A JPH084682B2 (en) | 1989-04-21 | 1989-04-21 | Low boiling point solvent recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02280802A true JPH02280802A (en) | 1990-11-16 |
| JPH084682B2 JPH084682B2 (en) | 1996-01-24 |
Family
ID=14344450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1103072A Expired - Lifetime JPH084682B2 (en) | 1989-04-21 | 1989-04-21 | Low boiling point solvent recovery method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084682B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005021851A (en) * | 2003-07-01 | 2005-01-27 | Kuraray Chem Corp | Method for recovering mixed solvent |
-
1989
- 1989-04-21 JP JP1103072A patent/JPH084682B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005021851A (en) * | 2003-07-01 | 2005-01-27 | Kuraray Chem Corp | Method for recovering mixed solvent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH084682B2 (en) | 1996-01-24 |
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