JPH09122402A - Cleaning method and device therefor - Google Patents
Cleaning method and device thereforInfo
- Publication number
- JPH09122402A JPH09122402A JP20706796A JP20706796A JPH09122402A JP H09122402 A JPH09122402 A JP H09122402A JP 20706796 A JP20706796 A JP 20706796A JP 20706796 A JP20706796 A JP 20706796A JP H09122402 A JPH09122402 A JP H09122402A
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- oily
- aqueous solution
- water
- cleaning
- 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
- 238000004140 cleaning Methods 0.000 title claims abstract description 163
- 238000000034 method Methods 0.000 title claims abstract description 49
- 239000002904 solvent Substances 0.000 claims abstract description 276
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 157
- 238000000926 separation method Methods 0.000 claims abstract description 101
- 239000002689 soil Substances 0.000 claims abstract description 100
- 238000000605 extraction Methods 0.000 claims abstract description 29
- 238000005238 degreasing Methods 0.000 claims abstract description 28
- 239000013557 residual solvent Substances 0.000 claims abstract description 10
- 238000009835 boiling Methods 0.000 claims abstract description 6
- 239000007864 aqueous solution Substances 0.000 claims description 174
- 238000003809 water extraction Methods 0.000 claims description 78
- 238000005406 washing Methods 0.000 claims description 50
- 239000000243 solution Substances 0.000 claims description 47
- 238000000638 solvent extraction Methods 0.000 claims description 47
- 238000005191 phase separation Methods 0.000 claims description 30
- 238000011084 recovery Methods 0.000 claims description 27
- 239000003125 aqueous solvent Substances 0.000 claims description 24
- 239000012141 concentrate Substances 0.000 claims description 19
- 238000007710 freezing Methods 0.000 claims description 14
- 230000008014 freezing Effects 0.000 claims description 14
- RRQYJINTUHWNHW-UHFFFAOYSA-N 1-ethoxy-2-(2-ethoxyethoxy)ethane Chemical compound CCOCCOCCOCC RRQYJINTUHWNHW-UHFFFAOYSA-N 0.000 claims description 12
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 239000000356 contaminant Substances 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 5
- FPZWZCWUIYYYBU-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl acetate Chemical compound CCOCCOCCOC(C)=O FPZWZCWUIYYYBU-UHFFFAOYSA-N 0.000 claims description 3
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 claims description 3
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 37
- 239000007788 liquid Substances 0.000 description 31
- 239000003921 oil Substances 0.000 description 22
- 239000003925 fat Substances 0.000 description 14
- 238000003756 stirring Methods 0.000 description 10
- 239000010419 fine particle Substances 0.000 description 9
- 230000005484 gravity Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 239000012459 cleaning agent Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 239000010730 cutting oil Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000003021 water soluble solvent Substances 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- -1 ethoxypropoxy group Chemical group 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Physical Water Treatments (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Description
【０００１】[0001]
【発明が属する技術分野】本発明は、機械部品や衣料等
の油性汚染物を、脱脂性溶剤の水溶液で洗浄し、汚染さ
れた水溶液から溶剤を回収して有効に再利用する洗浄方
法及び洗浄装置に関する。TECHNICAL FIELD The present invention relates to a cleaning method and a cleaning method in which oily contaminants such as machine parts and clothing are washed with an aqueous solution of a degreasing solvent, and the solvent is recovered from the contaminated aqueous solution and effectively reused. Regarding the device.
【０００２】[0002]
【従来の技術】ある種の多価アルコール誘導体の水溶液
が、温度差により油脂に対して溶解と不溶解の両方の性
質を有することを利用して、加温状態で油性汚れ、固形
分等を洗浄除去し、冷却して洗浄廃液を再生して使用す
ることは、特開平５─９４９８号公報や「洗浄設計」１
９９４，ｗｉｎｔｅｒ／ｐ．３３〜３９に記載されてい
る。2. Description of the Related Art Utilizing the fact that an aqueous solution of a certain polyhydric alcohol derivative has both properties of being soluble and insoluble in fats and oils due to a temperature difference, it is possible to remove oily dirt, solids, etc. in a heated state It is disclosed in Japanese Unexamined Patent Publication No. 5-9498 and "Washing Design" that the waste liquid is reused by washing and removing and cooling.
994, winter / p. 33-39.
【０００３】特開平５─９４９８号公報には、一般式
Ｒ−Ｏ−Ａn −ＣＯＣＨ3 又は、Ｒ−Ｏ−Ａn −Ｒ（式
中、Ｒは水素原子、メチル基、エチル基、ｎ−プロピル
基、イソプロピル基、ｎ−ブチル基、イソブチル基、ｓ
ｅｃブチル基又はｔｅｒｔブチル基、Ａはエトキシ基、
プロポキシ基又はエトキシプロポキシ基、ｎは１又は
２）で示される１種以上の化合物を、水で５〜８０重量
％に希釈して水溶液として用い、該水溶液を４０〜１０
０℃に加温して、塗料塗装時に付着する高分子物と金属
加工時に付着する油状物を被洗浄物から溶解して洗浄除
去し、また、洗浄後の水溶液を４０℃以下に冷却して汚
れ成分の溶解性を消失させ、相分離させて沈殿又は浮上
させることにより、溶剤水溶液を再生することが記載さ
れている。Japanese Unexamined Patent Publication No. 5-9498 discloses a general formula
R-O-An -COCH 3 or, R-O-An -R (wherein, R represents a hydrogen atom, a methyl group, an ethyl group, n- propyl group, an isopropyl group, n- butyl group, isobutyl group, s
ec butyl group or tert butyl group, A is an ethoxy group,
One or more compounds represented by propoxy group or ethoxypropoxy group, n is 1 or 2) is diluted with water to 5 to 80% by weight and used as an aqueous solution.
By heating to 0 ° C, the polymer that adheres during paint coating and the oil that adheres during metal processing are dissolved and washed away from the object to be washed, and the aqueous solution after washing is cooled to 40 ° C or less. It is described that the aqueous solution of the solvent is regenerated by eliminating the solubility of the stain component, phase-separating the precipitate, or allowing the precipitate to float.
【０００４】また、「洗浄設計」には、準水系洗浄剤を
６０℃以上に加温して汚れを洗浄し、４０℃以下に冷却
して洗浄剤を再生することが記載されている。図１１
は、この洗浄方法の洗浄・再生原理を説明するための概
念図である。濃度３５％の溶剤水溶液を６０℃に加温す
ると、上層部に９０％濃度、下層部に２０％濃度の水溶
液に２相分離する。上層部の水溶液は洗浄に必要な高濃
度を有している。この溶液を攪拌して高濃度溶液を微粒
化して低濃度溶液中に分散した後、被洗浄体を前記分散
液中に浸漬し、油性汚れを微粒の高濃度溶液中に溶解し
て洗浄する。洗浄を終了した溶剤水溶液を常温まで冷却
し、油性汚れ成分を溶剤水溶液から相分離させて浮上さ
せ、再生された溶剤水溶液を洗浄工程で再利用すること
が記載されている。Further, "cleaning design" describes that a semi-aqueous cleaning agent is heated to 60 ° C. or higher to clean dirt, and cooled to 40 ° C. or lower to regenerate the cleaning agent. FIG.
FIG. 3 is a conceptual diagram for explaining the cleaning / regeneration principle of this cleaning method. When an aqueous solution of a solvent having a concentration of 35% is heated to 60 ° C., two phases are separated into an aqueous solution having a concentration of 90% in the upper layer and an aqueous solution of 20% in the lower layer. The upper layer aqueous solution has a high concentration necessary for cleaning. This solution is stirred to atomize the high-concentration solution and disperse it in the low-concentration solution, and then the object to be cleaned is dipped in the dispersion to dissolve oily stains in the high-concentration fine particle solution for cleaning. It is described that the solvent aqueous solution that has been washed is cooled to room temperature, the oily soil component is phase-separated from the solvent aqueous solution and floated, and the regenerated solvent aqueous solution is reused in the washing step.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記の方法で
は、洗浄を終了した溶剤水溶液から相分離された汚れ成
分は、系外に廃棄していた。この汚れ成分中には、相当
量の洗浄剤が含まれており、洗浄コストを押し上げる原
因となっていた。そこで、本発明は、上記の問題点を解
消し、溶剤の脱脂性溶剤の回収効率を高め、効率的な洗
浄方法及び洗浄装置を提供しようとするものであり、さ
らに、水抽出工程における溶剤の回収率を向上させ、油
性汚れ濃縮液の廃棄量を減少させることができる洗浄方
法及び洗浄装置を提供しようとするものである。However, in the above-mentioned method, the dirt components phase-separated from the aqueous solvent solution after washing have been discarded outside the system. This dirt component contained a considerable amount of cleaning agent, which was a cause of increasing the cleaning cost. Therefore, the present invention is to solve the above problems, to enhance the recovery efficiency of the degreasing solvent of the solvent, to provide an efficient cleaning method and a cleaning apparatus, further, of the solvent in the water extraction step An object of the present invention is to provide a cleaning method and a cleaning device capable of improving the recovery rate and reducing the amount of the oily soil concentrated liquid to be discarded.
【０００６】[0006]
【課題を解決するための手段】本発明は、下記の構成を
採用することにより、上記の問題点を解消することに成
功した。 (1) 凝固点から沸点の間の温度で濃度の異なる水溶液に
２相分離する特性を示す脱脂性溶剤水溶液を用い、該溶
剤水溶液が相分離する温度に加温して、高濃度溶剤水溶
液で油性汚染物を洗浄する工程と、前記洗浄工程から
の、油性汚れを含有する溶剤水溶液を前記相分離温度よ
り低い温度に冷却し、油性汚れ分離物を浮上させて分離
する工程と、前記油性汚れ分離物の分離工程からの油性
汚れ分離物に水を添加し、残存溶剤を水で抽出して希薄
溶剤水溶液として回収する溶剤抽出工程とを有すること
を特徴とする洗浄方法。The present invention has succeeded in solving the above problems by adopting the following configuration. (1) Use a degreasing solvent aqueous solution that exhibits two-phase separation into aqueous solutions having different concentrations at temperatures between the freezing point and the boiling point, and heat to a temperature at which the solvent aqueous solution undergoes phase separation, A step of washing contaminants, a step of cooling the aqueous solvent solution containing oily soil from the washing step to a temperature lower than the phase separation temperature, and floating and separating the oily soil separated matter; and the oily soil separation And a solvent extraction step in which water is added to the oily soil separation material from the material separation step and the residual solvent is extracted with water to recover a diluted solvent aqueous solution.
【０００７】(2) 前記洗浄工程において、溶剤水溶液を
攪拌して高濃度溶剤水溶液の微粒化処理を施し、該微粒
により油性汚染物を洗浄することを特徴とする上記(1)
記載の洗浄方法。(2) In the cleaning step, the solvent aqueous solution is stirred to perform atomization treatment of the high-concentration solvent aqueous solution, and the oily contaminants are washed with the particles (1)
The described cleaning method.
【０００８】(3) 前記油性汚れ分離物に水を添加して残
留溶剤を抽出する抽出工程を、添加水として常温水を用
いる常温水抽出工程とすることを特徴とする上記(1) 又
は(2) 記載の洗浄方法。(3) The above-mentioned (1) or (1), characterized in that the extraction step of adding water to the oily soil separation product to extract the residual solvent is a room-temperature water extraction step using normal-temperature water as added water. 2) The cleaning method described.
【０００９】(4) 前記油性汚れ分離物に水を添加して残
留溶剤を抽出する抽出工程を、添加水の温度又は添加水
と油性汚れ分離物との混合物の温度を凝固点より高いが
凝固点に近い温度まで冷却して抽出を行う低温水抽出工
程とすることを特徴とする上記(1) 又は(2) 記載の洗浄
方法。(4) In the extraction step of adding water to the oily soil separation product to extract the residual solvent, the temperature of the added water or the temperature of the mixture of the added water and the oily soil separation is set to a freezing point higher than the freezing point. The cleaning method according to (1) or (2) above, which comprises a low-temperature water extraction step of performing extraction by cooling to a close temperature.
【００１０】(5) 前記油性汚れ分離物に水を添加して残
留溶剤を抽出する抽出工程として、添加水として常温水
を用いる常温水抽出工程に続けて、添加水の温度又は添
加水と油性汚れ分離物との混合物の温度を凝固点より高
いが凝固点に近い温度まで冷却して抽出を行う低温水抽
出工程を設けるか、又は、前記低温水抽出工程に続けて
前記低温水抽出工程を設けることを特徴とする上記(1)
又は(2) 記載の洗浄方法。(5) As the extraction step of adding water to the oily soiled matter to extract the residual solvent, the temperature of the added water or the added water and oil Providing a low temperature water extraction step in which the temperature of the mixture with the dirt isolate is cooled to a temperature higher than the freezing point but close to the freezing point for extraction, or the low temperature water extraction step is provided subsequent to the low temperature water extraction step. Above (1) characterized by
Or the cleaning method described in (2).
【００１１】(6) 前記溶剤抽出工程で添加する水の量
を、洗浄工程で加熱により大気中に蒸散する水の損失
量、及び、前記溶剤抽出工程で油性汚れとともに廃棄さ
れる水の損失量の合計損失量に一致させ、前記溶剤分離
工程及び前記溶剤抽出工程で回収した溶剤水溶液を前記
洗浄工程に戻すことを特徴とする上記(1) 〜(5) のいず
れか１つに記載の洗浄方法。(6) The amount of water added in the solvent extraction step, the loss of water that evaporates into the atmosphere by heating in the washing step, and the amount of water that is discarded along with oily dirt in the solvent extraction step Washing according to any one of (1) to (5) above, wherein the solvent aqueous solution recovered in the solvent separation step and the solvent extraction step is returned to the washing step in accordance with the total loss amount of Method.
【００１２】(7) 前記溶剤抽出工程で添加する水の量
を、油性汚れの重量の０．２〜３倍の範囲で選択するこ
とを特徴とする上記(1) 〜(6) のいずれか１つに記載の
洗浄方法。(7) Any one of the above (1) to (6), characterized in that the amount of water added in the solvent extraction step is selected in the range of 0.2 to 3 times the weight of oily soil. The cleaning method according to one.
【００１３】(8) 洗浄を終了して引き上げられる被洗浄
体を濯ぎ洗浄する工程を設け、前記油性汚れ分離工程で
回収した溶剤水溶液を前記洗浄工程に戻して再利用し、
また、前記溶剤抽出工程で回収した希薄溶剤水溶液を前
記濯ぎ洗浄工程に戻して再利用することを特徴とする上
記(1) 〜(7) のいずれか１つに記載の洗浄方法。(8) A step of rinsing and washing the object to be washed that has been completed after the washing is provided, and the aqueous solvent solution recovered in the oily dirt separating step is returned to the washing step for reuse.
Further, the cleaning method according to any one of (1) to (7) above, wherein the diluted solvent aqueous solution recovered in the solvent extraction step is returned to the rinse cleaning step and reused.
【００１４】(9) 前記溶剤水溶液は、相分離温度が０〜
８０℃の範囲にあり、溶剤濃度が１０〜６０ｗｔ％の範
囲で前記洗浄工程で使用することを特徴とする上記(1)
〜(8) のいずれか１つに記載の洗浄方法。(9) The aqueous solution of the solvent has a phase separation temperature of 0 to
The above (1) is characterized in that it is used in the washing step in the range of 80 ° C. and the solvent concentration is in the range of 10 to 60 wt%.
~ The cleaning method according to any one of (8).
【００１５】(10)前記溶剤水溶液として、ジエチレング
リコールジエチルエーテル、又は、ジエチレングリコー
ルモノエチルエーテルアセテート、又は、ジエチレング
リコールジエチルエーテルとジエチレングリコールモノ
ブチルエーテルとの混合物を使用することを特徴とする
上記(9) 記載の洗浄方法。(10) As the aqueous solution of the solvent, diethylene glycol diethyl ether, diethylene glycol monoethyl ether acetate, or a mixture of diethylene glycol diethyl ether and diethylene glycol monobutyl ether is used. Method.
【００１６】(11)凝固点から沸点の間の温度で濃度の異
なる水溶液に２相分離する特性を示す脱脂性溶剤水溶液
を用いて油性汚染物を洗浄する装置において、前記相分
離温度より高い温度で高濃度溶剤水溶液で油性汚染物を
洗浄する洗浄槽と、前記相分離温度より低い温度で油性
汚れ分離物を浮上させる油性汚れ分離装置と、前記油性
汚れ分離物に水を添加して希薄溶剤水溶液を回収する溶
剤抽出装置とからなり、前記洗浄槽には、前記相分離温
度より高い温度に加温する手段を介して前記洗浄槽に戻
す前記溶剤水溶液の循環用導管を接続し、該循環用導管
を分岐して前記油性汚れ分離装置に前記溶剤水溶液を送
液する導管を接続し、また、前記溶剤水溶液を導入する
前記油性汚れ分離装置には、回収溶剤水溶液を前記洗浄
槽に戻す導管を接続し、油性汚れ分離物を前記溶剤抽出
装置に送液する導管を接続し、前記油性汚れ分離物を導
入する前記溶剤抽出装置には、給水管及び油性汚れ濃縮
物排出管が接続され、かつ、該装置で回収された希薄溶
剤水溶液を前記洗浄槽に戻す導管を接続したことを特徴
とする洗浄装置。(11) In a device for cleaning oily contaminants using an aqueous solution of a degreasing solvent that exhibits a characteristic of two-phase separation into an aqueous solution having different concentrations at a temperature between the freezing point and the boiling point, at a temperature higher than the phase separation temperature. A cleaning tank for washing oily contaminants with a high-concentration solvent aqueous solution, an oily soil separation device for floating oily soiled separations at a temperature lower than the phase separation temperature, and a diluted solvent aqueous solution by adding water to the oily soiled separations. And a solvent extraction device for recovering the solvent, the cleaning tank is connected to a circulation conduit for circulating the solvent aqueous solution which is returned to the cleaning tank through a means for heating to a temperature higher than the phase separation temperature. A conduit is branched to connect a conduit for feeding the solvent aqueous solution to the oily soil separating device, and the oily soil separating device for introducing the solvent aqueous solution has a conduit for returning the recovered solvent aqueous solution to the cleaning tank. Connection Then, connecting a conduit for sending the oily soiled isolate to the solvent extractor, the solvent extractor for introducing the oily soil isolate is connected to a water supply pipe and an oily soil concentrate discharge pipe, and A cleaning apparatus, which is connected to a conduit for returning the diluted solvent aqueous solution recovered by the apparatus to the cleaning tank.
【００１７】(12)前記洗浄槽の前記循環用導管の途中に
ポンプ装置を設け、前記油性汚れ分離装置で分離された
溶剤水溶液を前記洗浄槽に戻す導管を弁装置を介して接
続することにより、高濃度溶剤水溶液を微粒化すること
を特徴とする上記(11)記載の洗浄装置。(12) By providing a pump device in the middle of the circulation conduit of the cleaning tank, and connecting a conduit for returning the aqueous solvent solution separated by the oily soil separating device to the cleaning tank through a valve device. The cleaning apparatus according to (11) above, characterized in that the high-concentration solvent aqueous solution is atomized.
【００１８】(13)前記溶剤抽出装置は、前記油性汚れ分
離装置からの油性汚れ分離物と、給水管から供給される
常温水とを貯留する分離槽に、該分離槽で浮上分離され
た油性汚れ濃縮物を排出する排出管及び該分離槽から希
薄溶剤水溶液を回収する導管を接続した常温水抽出装置
であることを特徴とする上記(11)記載の洗浄装置。(13) The solvent extraction device is arranged such that the oily soil separated from the oily soil separation device and the room temperature water supplied from the water supply pipe are stored in a separation tank which is floated and separated in the separation tank. The washing apparatus according to (11) above, which is a room-temperature water extraction apparatus connected to a discharge pipe for discharging the dirt concentrate and a conduit for collecting the diluted solvent aqueous solution from the separation tank.
【００１９】(14)前記溶剤抽出装置は、前記油性汚れ分
離装置からの油性汚れ分離物と、給水管から供給される
水とを貯留する分離槽を有し、前記給水管又は前記分離
槽に冷却器を設け、該分離槽で低温で浮上分離された油
性汚れ濃縮物を排出する排出管及び該分離槽から希薄溶
剤水溶液を回収する導管を接続した低温水抽出装置であ
ることを特徴とする上記(11)記載の洗浄装置。(14) The solvent extraction device has a separation tank for storing the oily dirt separated product from the oily dirt separation device and the water supplied from the water supply pipe, and the water supply pipe or the separation tank It is a low-temperature water extraction device provided with a cooler, and connected to a discharge pipe for discharging the oily soil concentrate floated and separated at a low temperature in the separation tank and a conduit for collecting a dilute solvent aqueous solution from the separation tank. The cleaning apparatus according to (11) above.
【００２０】(15)上記(13)に記載の常温水抽出装置と、
上記(14)に記載の低温水抽出装置を直列に配置し、前記
油性汚れ分離装置からの油性汚れ分離物を前記常温水抽
出装置に送る導管及び前記常温水抽出装置からの油性汚
れ分離物を前記低温水抽出装置に送る導管を接続し、前
記低温水抽出装置から最終的な油性汚れ濃縮液を廃棄す
る排出管を接続し、前記常温水抽出装置及び前記低温水
抽出装置からの希薄溶剤水溶液回収用導管を接続したこ
とを特徴とする洗浄装置。(15) A room temperature water extractor according to (13) above,
The low-temperature water extractor according to the above (14) is arranged in series, an oily soil separation product from the oily soil separation device and a conduit for sending the oily soil separation product from the oily soil separation device to the room temperature water extraction device, and the oily soil separation product from the room temperature water extraction device. A conduit for sending to the low temperature water extractor is connected, a discharge pipe for discarding the final oily soil concentrate from the low temperature water extractor is connected, and a dilute solvent aqueous solution from the room temperature water extractor and the low temperature water extractor is connected. A cleaning device having a recovery conduit connected thereto.
【００２１】(16)前記溶剤抽出装置の希薄溶剤水溶液回
収用導管にポンプを付設し、該ポンプの吸入側の前記回
収用導管を前記溶剤抽出装置の分離槽下部に接続し、該
ポンプの吐出側の前記回収用導管を該分離槽の上部に接
続することにより、回収希薄溶剤水溶液を該分離槽に強
制循環を可能としたことを特徴とする上記(13)〜(15)の
いずれか１つに記載の洗浄装置。(16) A pump is attached to the dilute solvent aqueous solution recovery conduit of the solvent extraction device, and the recovery conduit on the suction side of the pump is connected to the lower part of the separation tank of the solvent extraction device to discharge the pump. Any one of the above (13) to (15), characterized in that the recovery dilute solvent aqueous solution can be forcedly circulated to the separation tank by connecting the recovery conduit on the side to the upper part of the separation tank. Cleaning device according to item 1.
【００２２】(17)前記洗浄槽の上部にスプレーを配置し
て油性汚染物の濯ぎ洗浄部を形成し、前記溶剤抽出装置
からの希薄溶剤水溶液回収用導管を前記スプレーに接続
したことを特徴とする上記(11)〜(16)のいずれか１つに
記載の洗浄装置。(17) A spray is arranged above the cleaning tank to form a rinse cleaning section for oily contaminants, and a pipe for collecting a dilute solvent aqueous solution from the solvent extraction device is connected to the spray. The cleaning device according to any one of (11) to (16) above.
【００２３】[0023]
【発明の実施の形態】図１は、本発明の脱脂洗浄方法の
工程説明図である。この方法は、油脂洗浄工程、濯ぎ洗
浄工程、油性汚れ分離工程、常温水抽出工程、低温水抽
出工程、前記油性汚れ分離工程からの溶剤水溶液戻し工
程、並びに、常温水抽出工程及び低温水抽出工程からの
希薄溶剤水溶液戻し工程からなり、常温水抽出工程と低
温水抽出工程を１つの水抽出工程としてもよい。以下、
図１に沿って説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a process explanatory diagram of a degreasing and cleaning method of the present invention. This method includes an oil and fat washing step, a rinsing washing step, an oily dirt separating step, a room temperature water extracting step, a low temperature water extracting step, a solvent aqueous solution returning step from the oily dirt separating step, and a room temperature water extracting step and a low temperature water extracting step. The process of returning the diluted solvent aqueous solution may be performed, and the room temperature water extraction step and the low temperature water extraction step may be one water extraction step. Less than,
It will be described with reference to FIG.
【００２４】油脂洗浄工程では、凝固点から沸点の間の
温度で濃度の異なる水溶液に２相分離する脱脂性溶剤水
溶液を２相分離温度以上に加熱する工程と、２相分離し
た溶剤水溶液を攪拌して高濃度の溶剤水溶液を微粒化し
て低濃度の溶剤水溶液中に分散させる工程と、洗浄体を
前記分散溶剤水溶液に浸漬して付着した油性汚れを洗浄
する工程からなる。In the step of washing oils and fats, a step of heating a degreasing solvent aqueous solution that separates into two phases into aqueous solutions having different concentrations at temperatures between the freezing point and the boiling point, and stirring the aqueous solution separated into two phases A step of atomizing a high-concentration solvent aqueous solution to disperse it in a low-concentration solvent aqueous solution, and a step of immersing the cleaning body in the dispersion solvent aqueous solution to wash the attached oily dirt.
【００２５】油性汚れ分離工程は、油性汚れを含有する
溶剤水溶液を油脂洗浄工程から導入する送液工程と、該
溶剤水溶液を、２相分離温度より低い温度に冷却する冷
却工程と、油性汚れ分離物と単相の溶剤水溶液に比重差
で分離する工程と、回収溶剤水溶液を送液する工程と、
油性汚れ分離物を排出する工程からなる。The oily soil separation step comprises a liquid feeding step of introducing an aqueous solvent solution containing oily soil from the oil and fat washing step, a cooling step of cooling the aqueous solvent solution to a temperature lower than the two-phase separation temperature, and an oily soil separation step. A step of separating the material and the single-phase solvent aqueous solution by a specific gravity difference, and a step of sending the recovered solvent aqueous solution,
It comprises the step of discharging the oily soil separation product.
【００２６】油性汚れ分離工程からの溶剤水溶液戻し工
程は、油性汚れ分離工程で回収された溶剤水溶液を油脂
洗浄工程に戻して脱脂性溶剤水溶液として再利用する循
環工程である。The solvent aqueous solution returning step from the oily dirt separating step is a circulating step in which the solvent aqueous solution recovered in the oily dirt separating step is returned to the oil / fat cleaning step and reused as a degreasing solvent aqueous solution.
【００２７】常温水抽出工程は、油性汚れ分離工程から
排出された油性汚れ分離物を導入し、常温水を添加し
て、前記分離物中に残存する溶剤を常温水で抽出する工
程と、該抽出工程で分離された希薄溶剤水溶液を回収す
る工程と、油性汚れ濃縮物を排出する工程からなる。In the room temperature water extraction step, a step of introducing the oily dirt separated product discharged from the oily dirt separating step, adding room temperature water, and extracting the solvent remaining in the separated product with room temperature water, It consists of a step of collecting the dilute solvent aqueous solution separated in the extraction step and a step of discharging the oily soil concentrate.
【００２８】低温水抽出工程は、常温水抽出工程から排
出された油性汚れ濃縮物を導入し、冷却水を添加して、
前記濃縮物中に残存する溶剤を冷却水で抽出する工程
と、該抽出工程で分離された希薄溶剤水溶液を回収する
工程と、油性汚れ低温濃縮物を排出する工程からなる。
なお、前記のように冷却水を添加する代わりに、常温水
を添加して抽出用分離槽内の冷却器で冷却して低温抽出
することも可能である。In the low temperature water extraction step, the oily soil concentrate discharged from the room temperature water extraction step is introduced, cooling water is added,
It comprises a step of extracting the solvent remaining in the concentrate with cooling water, a step of recovering the dilute solvent aqueous solution separated in the extraction step, and a step of discharging the oily soil low temperature concentrate.
Instead of adding cooling water as described above, it is also possible to add room temperature water and cool with a cooler in the separation tank for extraction to perform low temperature extraction.
【００２９】また、常温水抽出工程を省略して、図１の
点線のように、油性汚れ分離工程から排出された油性汚
れ分離物を低温水抽出工程に直接導入して水抽出工程を
１段で行うこともできる。なお、低温水抽出工程を省略
して、常温水抽出工程だけで溶剤回収を行ってもよい。Further, the room temperature water extraction step is omitted, and the oily dirt separated product discharged from the oily dirt separation step is directly introduced into the low temperature water extraction step as shown by the dotted line in FIG. You can also do it in. The low temperature water extraction step may be omitted and the solvent may be recovered only by the room temperature water extraction step.
【００３０】常温水抽出工程及び低温水抽出工程からの
希薄溶剤水溶液戻し工程は、常温水抽出工程及び低温水
抽出工程で回収された希薄溶剤水溶液を、下記の濯ぎ洗
浄工程に供給する工程である。そして、前記回収された
希薄溶剤水溶液の一部は、常温水抽出工程及び低温水抽
出工程にそれぞれ強制的に循環して使用することも可能
である。（図１では省略）。The diluted solvent aqueous solution returning step from the room temperature water extraction step and the low temperature water extraction step is a step of supplying the diluted solvent aqueous solution recovered in the room temperature water extraction step and the low temperature water extraction step to the rinse cleaning step described below. . Then, a part of the recovered diluted solvent aqueous solution may be forcibly circulated and used in the normal temperature water extraction step and the low temperature water extraction step, respectively. (Omitted in FIG. 1).
【００３１】濯ぎ洗浄工程は、前記油脂洗浄工程から洗
浄体を引き揚げる工程と、前記希薄溶剤水溶液戻し工程
からの希薄溶剤水溶液を加熱する工程と、加熱された希
薄溶剤水溶液を引き揚げ洗浄体に濯ぐスプレ工程と、濯
ぎ洗浄を終了した洗浄体を搬出する工程からなる。In the rinsing and washing step, the step of lifting the washing body from the oil and fat washing step, the step of heating the diluted solvent aqueous solution from the step of returning the diluted solvent aqueous solution, and the rinsing of the heated dilute solvent aqueous solution to the washing body It consists of a spray process and a process of carrying out the cleaning body that has been rinsed and cleaned.
【００３２】図２は、本発明の脱脂洗浄方法を実施する
ための装置の１例を示した説明図である。この脱脂洗浄
装置は、洗浄槽１、油性汚れ分離装置２及び溶剤抽出装
置３を主要部とする。洗浄槽１には、溶剤水溶液４が収
容されており、その中に洗浄体５を浸漬して洗浄する。
装置の底部には超音波加振装置６が付設され、溶剤水溶
液４を攪拌する。装置の上部には冷却器３４が付設さ
れ、溶剤水溶液の蒸気を凝集して槽内に戻す作用をす
る。槽内の溶剤水溶液４の一部は、導管７、切替弁１
０、導管８、ポンプ１１、ろ過器１２、切替弁１３、導
管９及び加熱器１４を経て洗浄槽１に戻すように接続さ
れている。FIG. 2 is an explanatory view showing an example of an apparatus for carrying out the degreasing cleaning method of the present invention. This degreasing cleaning device mainly includes a cleaning tank 1, an oily soil separating device 2 and a solvent extracting device 3. The cleaning tank 1 contains an aqueous solution 4 of solvent, in which the cleaning body 5 is immersed and cleaned.
An ultrasonic vibration device 6 is attached to the bottom of the device to stir the aqueous solvent solution 4. A cooler 34 is attached to the upper part of the apparatus, and has a function of condensing the vapor of the solvent aqueous solution and returning it into the tank. Part of the solvent aqueous solution 4 in the tank is a conduit 7 and a switching valve 1.
0, the conduit 8, the pump 11, the filter 12, the switching valve 13, the conduit 9 and the heater 14 so as to return to the cleaning tank 1.
【００３３】ポンプ１１では溶剤水溶液が攪拌され、強
制的に洗浄槽１に循環させ、また、ろ過器１２では循環
する溶剤水溶液中の固形物を除去し、かつ、加熱器１４
では溶剤水溶液を２相分離温度以上に加熱することによ
り、高濃度溶剤水溶液を微粒化して洗浄槽１に戻す。そ
して、洗浄槽１内の溶剤水溶液は、さらに超音波加振装
置６で攪拌され、高濃度溶剤水溶液の微粒が濃度の低い
水溶液中に分散された状態で洗浄に供される。そして、
洗浄槽１内に浸漬された被洗浄体５は、高濃度溶剤水溶
液の微粒と接触することにより、洗浄体５に付着する油
性汚れは溶剤に溶解して分離される。The pump 11 agitates the solvent aqueous solution and forcibly circulates it in the cleaning tank 1. The filter 12 removes the solid matter in the circulating solvent aqueous solution, and the heater 14
Then, the high-concentration solvent aqueous solution is atomized and returned to the cleaning tank 1 by heating the aqueous solution of the solvent above the two-phase separation temperature. Then, the aqueous solvent solution in the cleaning tank 1 is further agitated by the ultrasonic vibration device 6 and is used for cleaning in a state in which fine particles of the high-concentration solvent aqueous solution are dispersed in the low-concentration aqueous solution. And
The body to be cleaned 5 immersed in the cleaning tank 1 comes into contact with the fine particles of the high-concentration solvent aqueous solution, so that the oily dirt adhering to the body to be cleaned 5 is dissolved in the solvent and separated.
【００３４】前記洗浄槽１の循環溶剤水溶液は、油性汚
れを含有しているので、切替弁１３を切替えて導管１５
を介して油性汚れ分離装置２に送られる。油性汚れ分離
装置２は、溢流壁１６で一部分離されており、溢流壁１
６の内側に冷却器１７が配置されている。油脂汚れを含
有する前記循環溶剤水溶液は、導管１５を介して溢流壁
１６の内側に導入され、冷却器１７で２相分離温度以下
に冷却することにより、単相の溶剤水溶液２０と油性汚
れ分離物１９に比重差で分離され、油性汚れ分離装置２
の底部から溶剤水溶液２０を回収し、導管２１及び切替
弁１０を介して洗浄槽１の溶剤水溶液循環系に戻して再
利用に供する。また、溢流壁１６を溢流した油性汚れ分
離物１８は、導管２２を介して溶剤抽出装置３に送られ
る。Since the circulating solvent aqueous solution in the cleaning tank 1 contains oily dirt, the switching valve 13 is switched to the conduit 15.
Is sent to the oily soil separation device 2 via. The oily dirt separation device 2 is partially separated by the overflow wall 16, and the overflow wall 1
A cooler 17 is arranged inside the unit 6. The circulating solvent aqueous solution containing grease stains is introduced into the overflow wall 16 through the conduit 15 and cooled to a temperature not higher than the two-phase separation temperature by the cooler 17, whereby the single-phase solvent aqueous solution 20 and the oil stains are removed. The oily dirt separation device 2 is separated into the separated matter 19 by the difference in specific gravity.
The solvent aqueous solution 20 is recovered from the bottom of the cleaning tank 1 and returned to the solvent aqueous solution circulation system of the cleaning tank 1 through the conduit 21 and the switching valve 10 for reuse. Further, the oily dirt separated substance 18 that has overflowed the overflow wall 16 is sent to the solvent extraction device 3 via the conduit 22.
【００３５】溶剤抽出装置３では、給水管２３を介して
水を添加して水抽出分離がなされ、希薄溶剤水溶液２５
は溶剤抽出装置３の底部から導管２７及びポンプ２８を
介して回収される。また、油性汚れ濃縮物２４は排出管
２６から系外に排出される。前記導管２７は切替弁２９
を介して導管３０と導管３１に分岐される。導管３０
は、回収された希薄溶剤水溶液２５を溶剤抽出装置３に
強制循環される。In the solvent extraction device 3, water is added through the water supply pipe 23 to perform water extraction separation, and the diluted solvent aqueous solution 25 is added.
Is recovered from the bottom of the solvent extractor 3 via conduit 27 and pump 28. The oily soil concentrate 24 is discharged from the system through the discharge pipe 26. The conduit 27 is a switching valve 29
Through a conduit 30 and a conduit 31. Conduit 30
Is forcibly circulated in the solvent extraction device 3 by the recovered diluted solvent aqueous solution 25.
【００３６】また、回収希薄溶剤水溶液２５の残部は、
導管３１に付設した加熱器３２で加熱され、スプレノズ
ル３３から噴霧され、洗浄槽１から引き揚げられた洗浄
体５を濯ぎ洗浄する。The balance of the recovered diluted solvent aqueous solution 25 is
The cleaning body 5 heated by the heater 32 attached to the conduit 31 and sprayed from the spray nozzle 33 and withdrawn from the cleaning tank 1 is rinsed and washed.
【００３７】図３は、本発明の脱脂洗浄方法を実施する
ための装置のもう１つの例を示した説明図であり、図２
の変形装置である。図２の装置との相違は、溶剤抽出装
置３に水を供給する給水管２３に冷却器を付設するか、
溶剤抽出装置３の分離槽内に冷却器を設けて、低温水抽
出を可能にしたものである。その他の装置構成は図２と
同じため説明を省略する。FIG. 3 is an explanatory view showing another example of the apparatus for carrying out the degreasing cleaning method of the present invention.
It is a transformation device. The difference from the device of FIG. 2 is that a water pipe 23 for supplying water to the solvent extraction device 3 is provided with a cooler,
A cooling device is provided in the separation tank of the solvent extraction device 3 to enable low temperature water extraction. Since the other device configurations are the same as those in FIG. 2, description thereof will be omitted.
【００３８】図４は、本発明の脱脂洗浄方法を実施する
ための装置のもう１つの例を示した説明図である。この
脱脂洗浄装置は、洗浄槽１、油性汚れ分離装置２、常温
水抽出装置３５及び低温水抽出装置４２を主要部とす
る。洗浄槽１に溶剤水溶液４を収容し、その中に洗浄体
５を浸漬して洗浄する。洗浄槽１の底部には超音波加振
装置６が付設され、溶剤水溶液４を攪拌する。洗浄槽１
の上部には冷却器３４が付設され、溶剤水溶液の蒸気を
凝集して槽内に戻す作用をする。洗浄槽１内の溶剤水溶
液４の一部は、導管７、切替弁１０、導管８、ポンプ１
１、ろ過器１２、切替弁１３、導管９及び加熱器１４を
介して洗浄槽１に戻すように接続されている。FIG. 4 is an explanatory view showing another example of an apparatus for carrying out the degreasing cleaning method of the present invention. This degreasing cleaning device mainly includes a cleaning tank 1, an oily soil separating device 2, a room temperature water extracting device 35, and a low temperature water extracting device 42. An aqueous solvent solution 4 is stored in the cleaning tank 1, and a cleaning body 5 is immersed in the cleaning solution 5 for cleaning. An ultrasonic vibration device 6 is attached to the bottom of the cleaning tank 1 to stir the aqueous solvent solution 4. Cleaning tank 1
A cooler 34 is attached to the upper part of the tank to coagulate the vapor of the solvent aqueous solution and return it to the inside of the tank. A part of the solvent aqueous solution 4 in the cleaning tank 1 includes a conduit 7, a switching valve 10, a conduit 8, and a pump 1.
1, the filter 12, the switching valve 13, the conduit 9 and the heater 14 are connected to return to the cleaning tank 1.
【００３９】ポンプ１１では溶剤水溶液を攪拌して強制
循環させ、ろ過器１２では循環する溶剤水溶液中の固形
物を除去し、かつ、加熱器１４では溶剤水溶液を２相分
離温度以上に加熱することにより、高濃度溶剤水溶液を
微粒化して洗浄槽１に戻す。洗浄槽１内の溶剤水溶液
は、さらに超音波加振装置６で攪拌され、高濃度溶剤水
溶液の微粒が低濃度溶剤水溶液中に分散された状態で洗
浄に供される。そして、洗浄槽１内に浸漬された洗浄体
５は、高濃度溶剤水溶液の微粒と接触することにより、
洗浄体５に付着している油性汚れは溶剤に溶解して除去
される。In the pump 11, the solvent aqueous solution is agitated and forcedly circulated, in the filter 12 solid matters in the circulating solvent aqueous solution are removed, and in the heater 14, the solvent aqueous solution is heated to the two-phase separation temperature or higher. Thus, the high-concentration solvent aqueous solution is atomized and returned to the cleaning tank 1. The solvent aqueous solution in the cleaning tank 1 is further stirred by the ultrasonic vibration device 6 and is used for cleaning in a state where fine particles of the high concentration solvent aqueous solution are dispersed in the low concentration solvent aqueous solution. The cleaning body 5 immersed in the cleaning tank 1 comes into contact with fine particles of the high-concentration solvent aqueous solution,
The oily dirt adhering to the cleaning body 5 is dissolved in a solvent and removed.
【００４０】前記洗浄槽１の循環溶剤水溶液は、油性汚
れを含有しているので、切替弁１３を切替えて導管１５
を介して油性汚れ分離装置２に送られる。油脂分離装置
２は、溢流壁１６で一部分離され、溢流壁１６の内側に
冷却器１７が配置されている。油性汚れを含有する前記
循環溶剤水溶液は、溢流壁１６の内側に導入され、冷却
器１７で２相分離温度以下に冷却され、単相の溶剤水溶
液２０と油性汚れ分離物１９に比重差で分離する。そし
て、溶剤水溶液２０は、油性汚れ分離装置２の底部から
回収し、導管２１及び切替弁１０を介して洗浄槽１の溶
剤水溶液循環系に戻して再利用に供される。また、溢流
壁１６を溢流した油性汚れ分離物１８は、導管２２を介
して常温水抽出装置３５に送られる。Since the circulating solvent aqueous solution in the cleaning tank 1 contains oily dirt, the switching valve 13 is switched to the conduit 15
Is sent to the oily soil separation device 2 via. The oil / fat separation device 2 is partially separated by the overflow wall 16, and the cooler 17 is arranged inside the overflow wall 16. The circulating solvent aqueous solution containing oily dirt is introduced inside the overflow wall 16 and cooled to a temperature below the two-phase separation temperature by a cooler 17, and the single-phase solvent aqueous solution 20 and the oily dirt separated matter 19 have a specific gravity difference. To separate. Then, the solvent aqueous solution 20 is recovered from the bottom of the oily soil separation device 2, returned to the solvent aqueous solution circulation system of the cleaning tank 1 via the conduit 21 and the switching valve 10 and reused. Further, the oily dirt separated substance 18 that has overflowed the overflow wall 16 is sent to the room temperature water extraction device 35 via the conduit 22.
【００４１】常温水抽出装置３５は、溢流壁３６で一部
分離されている。油性汚れ分離装置２から送られた油性
汚れ分離物１８は、給水管３７から添加される常温水で
溶剤抽出分離され、希薄溶剤水溶液３９と油性汚れ濃縮
物３８に分離される。希薄溶剤水溶液３９は、常温水抽
出装置３の底部から導管４３を介して回収され、低温水
抽出装置４２から導管６１を介して回収される希薄溶剤
水溶液５９とともに、切替弁４４で一緒にされ、導管４
５、ポンプ４６を介して切替弁４７に送られる。切替弁
４７では、この希薄溶剤水溶液を低温水抽出装置４２に
戻す導管４９と、常温水抽出装置３５に戻すために導管
４８とに分岐される。なお、導管４８は切替弁５０にお
いて常温水抽出装置３５に戻すために導管５１と、濯ぎ
洗浄用スプレノズル３３に接続する導管５２とに分岐さ
れる。なお、導管５２には加熱器３２が付設されてお
り、希薄溶剤水溶液を加熱し、洗浄槽１から引き揚げら
れる洗浄体５に対して噴霧される。The room temperature water extractor 35 is partially separated by an overflow wall 36. The oily soil separation product 18 sent from the oily soil separation device 2 is solvent-extracted and separated with room temperature water added from the water supply pipe 37 to be separated into a dilute solvent aqueous solution 39 and an oily soil concentrate 38. The dilute solvent aqueous solution 39 is collected from the bottom of the room temperature water extractor 3 via the conduit 43, and together with the dilute solvent aqueous solution 59 collected from the low temperature water extractor 42 via the conduit 61 by the switching valve 44, Conduit 4
5, sent to the switching valve 47 via the pump 46. The switching valve 47 is branched into a conduit 49 for returning the diluted solvent aqueous solution to the low temperature water extraction device 42 and a conduit 48 for returning it to the room temperature water extraction device 35. The conduit 48 is branched at the switching valve 50 into a conduit 51 for returning to the room temperature water extraction device 35 and a conduit 52 connected to the rinse cleaning spray nozzle 33. A heater 32 is attached to the conduit 52 to heat the diluted solvent aqueous solution and spray the diluted solution onto the cleaning body 5 to be withdrawn from the cleaning tank 1.
【００４２】洗浄を終了して洗浄槽１から引き揚げられ
る洗浄体５は、上記のように、スプレノズル３３から噴
霧される加熱希薄溶剤水溶液で濯ぎ洗浄することによ
り、洗浄体に付着している溶剤を分離回収し、洗浄工程
の溶剤水溶液中に戻され、洗浄工程における溶剤の損失
を低減する。また、水をスプレする場合と比較すると、
希薄溶剤水溶液が油性成分を僅かに含有するため、洗浄
体の防錆効果がある。The cleaning body 5 that has been washed and is withdrawn from the cleaning tank 1 is rinsed and washed with the heated dilute solvent aqueous solution sprayed from the spray nozzle 33 as described above to remove the solvent adhering to the cleaning body. It is separated and recovered, and returned to the solvent aqueous solution in the washing process to reduce the loss of the solvent in the washing process. Also, compared to the case of spraying water,
Since the diluted solvent aqueous solution contains a small amount of oily components, it has an anticorrosive effect on the cleaning body.
【００４３】このように、本発明の第１の特徴は、溶剤
抽出工程、又は、常温水抽出工程及び／又は低温水抽出
工程から回収される希薄溶剤水溶液の一部を前記各抽出
工程に戻すことにある。希薄溶剤水溶液を戻すのは、ポ
ンプの攪拌により溶剤が廃油から水側へ移動する現象を
促進する。抽出後戻すのではなく、抽出前にポンプで攪
拌し、抽出効果を高める作用をする。なお、ここでは、
ポンプで攪拌しているが、その他の攪拌手段で代替する
ことは可能である。また、本発明の第２の特徴は、水抽
出工程を常温水抽出工程と低温水抽出工程に分離するこ
とにより、抽出水量を少なくし、熱エネルギー消費を大
幅に低減することが可能となる。As described above, the first feature of the present invention is that a part of the dilute solvent aqueous solution recovered from the solvent extraction step or the room temperature water extraction step and / or the low temperature water extraction step is returned to each of the extraction steps. Especially. The returning of the dilute solvent aqueous solution promotes the phenomenon that the solvent moves from the waste oil to the water side by stirring the pump. Rather than returning after extraction, it is stirred by a pump before extraction to enhance the extraction effect. Here,
Although stirring is performed by a pump, other stirring means can be used instead. The second feature of the present invention is that the water extraction step is separated into a room temperature water extraction step and a low temperature water extraction step, whereby the amount of extracted water can be reduced and thermal energy consumption can be significantly reduced.
【００４４】油脂洗浄工程における溶剤の溶解特性と洗
浄メカニズムについて図５により説明する。図５は、ジ
エチレングリコールジエチルエーテル〔Ｃ2 Ｈ5 Ｏ（Ｃ
Ｈ2ＣＨ2 Ｏ）3 Ｃ2 Ｈ5 、以下、ＤＥＧ−ＤＥＥと略
記する〕を溶剤とした溶剤水溶液の溶剤濃度と温度を変
え、溶剤水溶液の２相分離特性を示したものである。Solvent dissolution characteristics and cleaning mechanism in the oil and fat cleaning step will be described with reference to FIG. FIG. 5 shows diethylene glycol diethyl ether [C 2 H 5 O (C
H 2 CH 2 O) 3 C 2 H 5, or less, varying the solvent concentration and temperature of the solvent aqueous solution as a solvent to be abbreviated as the DEG-DEE] illustrates a two-phase separation characteristics of the solvent solution.
【００４５】図５から次のことが分かる。 １）ＤＥＧ−ＤＥＥの水溶液は、濃度に対応して均一な
水溶液となる温度範囲と、２相に分離する温度範囲とを
境界する温度がある。 ２）この境界の温度を２相分離温度Ｔｃという。この２
相分離温度Ｔｃは、溶剤の濃度ξに対応して一義的に決
まる。The following can be seen from FIG. 1) The DEG-DEE aqueous solution has a temperature that delimits a temperature range in which it becomes a uniform aqueous solution and a temperature range in which it is separated into two phases, depending on the concentration. 2) The temperature at this boundary is called the two-phase separation temperature Tc. This 2
The phase separation temperature Tc is uniquely determined according to the concentration ξ of the solvent.
【００４６】３）２相分離温度以上の温度で、２相分離
した成分の組成と存在量の比率は、いわゆるテコの原理
で決まる。例えば、ξａ＝３５ｗｔ％とすると、ｔ＜４
０℃の範囲では全体がξ＝ξａの均一な水溶液である
が、ｔ＞４０℃の範囲では、濃度ξ1 と濃度ξ2 の溶剤
水溶液に分離する。ξ1 ＞ξ2 とすると、高濃度ξ1 の
水溶液は、比重が小さいので、低濃度ξ2 の水溶液の上
にくる。ｔ＝４０℃は境界温度で、温度を上げる時には
２相分離開始温度と言えるし、温度を下げるときには均
一溶解復元温度ということができる。そして、濃度ξ1
と濃度ξ2 の溶剤水溶液の存在量は、それぞれの量をｗ
1 ，ｗ2 、ＡをＴ＝４０℃の線と濃度ξａの交点とする
と、ｗ1 ：ｗ2 ＝ξ2 Ａ：ξ1 Ａ となる。（図５参
照）3) At temperatures above the two-phase separation temperature, the composition and abundance ratios of the two-phase separated components are determined by the so-called lever principle. For example, if ξa = 35 wt%, t <4
In the range of 0 ° C., the whole is a uniform aqueous solution of ξ = ξa, but in the range of t> 40 ° C., it separates into a solvent aqueous solution of concentration ξ 1 and concentration ξ 2 . If ξ 1 > ξ 2 , the high-concentration aqueous solution of ξ 1 has a small specific gravity, and therefore comes on top of the low-concentration aqueous solution of ξ 2 . The boundary temperature is t = 40 ° C., and it can be said that when the temperature is raised, it is the two-phase separation start temperature, and when the temperature is lowered, it is the uniform dissolution restoration temperature. And the concentration ξ 1
And the amount of solvent aqueous solution with concentration ξ 2 are w
If 1 , w 2 and A are the intersections of the line of T = 40 ° C. and the concentration ξa, then w 1 : w 2 = ξ 2 A: ξ 1 A. (See Fig. 5)
【００４７】４）ξ≧９０ｗｔ％の範囲では温度に無関
係に均一相である。 ５）ＤＥＧ−ＤＥＥを用いた溶剤水溶液の洗浄力特性を
温度２０℃の単相液について洗浄力特性を調査した結
果、 ａ）ξ≧７０ｗｔ％の均一な水溶液は油脂汚れの洗浄力
（油性汚れの溶解度）は大きく洗浄液として好適であ
る。 ｂ）ξ＜４５ｗｔ％の均一な水溶液は油脂汚れの洗浄力
（油性汚れの溶解度）は小さく洗浄液として好適な範囲
を逸脱する。このことから、ξ1 ＞７０ｗｔ％が得られ
る濃度の溶剤水溶液を２相分離させて、攪拌混合する
と、ξ1 ＞７０ｗｔ％の高濃度水溶液は低濃度水溶液中
に微粒化分散し、この微粒子が油性汚れを溶解して洗浄
が行われる。4) In the range of ξ ≧ 90 wt%, the phase is uniform regardless of temperature. 5) As a result of investigating the detergency characteristics of a single-phase liquid having a temperature of 20 ° C., the detergency characteristics of a solvent aqueous solution using DEG-DEE were as follows: Has a large solubility) and is suitable as a cleaning solution. b) A uniform aqueous solution of ξ <45 wt% has a small detergency for oil stains (solubility of oily stains) and deviates from a range suitable as a cleaning liquid. From this fact, when the solvent aqueous solution having a concentration of ξ 1 > 70 wt% is separated into two phases and mixed by stirring, the high concentration aqueous solution of ξ 1 > 70 wt% is atomized and dispersed in the low concentration aqueous solution, and the fine particles are The oily dirt is dissolved and washed.
【００４８】６）ＤＥＧ−ＤＥＥと同様の溶解特性を示
す脱脂性溶剤としては、ジエチレングリコールジエチル
エーテル〔Ｃ2 Ｈ5 ＯＣＨ2 ＣＨ2 ＯＣＨ2 ＣＨ2 ＯＣ
2Ｈ5 〕の他に、ジエチレングリコールモノエチルエー
テルアセテート〔Ｃ2Ｈ5 ＯＣＨ2 ＣＨ2 ＯＣＨ2 ＣＨ
2 ＯＣＯＣＨ3 〕、又はジエチレングリコールジエチル
エーテル〔Ｃ2 Ｈ5 ＯＣＨ2 ＣＨ2 ＯＣＨ2 ＣＨ2 ＯＣ
2 Ｈ5〕とジエチレングリコールモノブチルエーテル
〔ＨＯＣＨ2 ＣＨ2 ＯＣＨ2ＣＨ2 ＯＣ4 Ｈ9 〕との混
合物を使用することができる。これらはジエチレングリ
コールジエチルエーテルに類似した特性を有し、常温近
くで単相液で、９０ｗｔ％濃度では温度に無関係に単相
液、６０℃近くで所望の濃度の２相分離液になることを
確認した。6) As a degreasing solvent having the same solubility characteristics as DEG-DEE, diethylene glycol diethyl ether [C 2 H 5 OCH 2 CH 2 OCH 2 CH 2 OC is used.
2 H 5 ], diethylene glycol monoethyl ether acetate [C 2 H 5 OCH 2 CH 2 OCH 2 CH
2 OCOCH 3 ] or diethylene glycol diethyl ether [C 2 H 5 OCH 2 CH 2 OCH 2 CH 2 OC
2 H 5 ] and a mixture of diethylene glycol monobutyl ether [HOCH 2 CH 2 OCH 2 CH 2 OC 4 H 9 ] can be used. It is confirmed that these have similar properties to diethylene glycol diethyl ether, and are a single-phase liquid near room temperature, a single-phase liquid at 90 wt% concentration regardless of temperature, and a two-phase separation liquid with a desired concentration near 60 ° C. did.
【００４９】図６は、溶剤抽出工程における水添加量と
溶剤回収率の関係を示したグラフである。汚れの原因と
なる油脂として、切削油（ユシロ化学社製、ユシロンカ
ット）１．５ｋｇを、また、脱脂性溶剤として、ジエチ
レングリコールエチルエーテル２．２ｋｇを混合し、従
来の油性汚れ溶剤水溶液を想定した模擬廃油を作成し
た。この模擬廃油の重量に対する水の添加量を変化さ
せ、２５℃に保持しながら攪拌して３０分間静置した。
その後、ジエチレングリコールエチルエーテルの水側へ
の移動量をクロマトグラフを用いて測定し、溶剤回収率
と水添加量の関係をグラフに示した。FIG. 6 is a graph showing the relationship between the amount of water added and the solvent recovery rate in the solvent extraction step. A simulation assuming 1.5 kg of cutting oil (Yushiro Chemical Co., Ltd., Yusilon cut) as a fat and oil that causes dirt, and 2.2 kg of diethylene glycol ethyl ether as a degreasing solvent, assuming a conventional oily dirt solvent aqueous solution. Created waste oil. The amount of water added was changed with respect to the weight of this simulated waste oil, and the mixture was stirred while being kept at 25 ° C. and allowed to stand for 30 minutes.
Then, the migration amount of diethylene glycol ethyl ether to the water side was measured using a chromatograph, and the relationship between the solvent recovery rate and the water addition amount was shown in the graph.
【００５０】図６から次のことが明らかである。 １）水を添加すれば、従来の装置で分離した油性汚れの
分離物からさらに溶剤を回収することができる。即ち、
水抽出により溶剤回収が可能になる。 ２）水の添加量を増やせば、溶剤の回収率は向上する。 ３）溶剤回収率は約８０％で飽和する飽和特性を示し、
水添加量は３重量倍程度が限界である。The following is clear from FIG. 1) If water is added, the solvent can be further recovered from the oily dirt separated product separated by the conventional apparatus. That is,
Solvent recovery becomes possible by water extraction. 2) Increasing the amount of water added improves the solvent recovery rate. 3) Solvent recovery shows a saturation characteristic of saturating at about 80%,
The amount of water added is limited to about 3 times by weight.
【００５１】図７は、低温水抽出工程に関連して、溶剤
回収率の抽出温度に対する温度依存性を示したグラフで
ある。汚れの原因となる油脂として、切削油（ユシロ化
学社製、ユシロンカット）を用い、脱脂性溶剤として
は、濃度３５ｗｔ％のジエチレングリコールジエチルエ
ーテルの溶剤水溶液を用い、上記油脂を３ｗｔ％溶解し
た。濃度３５ｗｔ％の上記の溶剤水溶液の凝固点は、実
測値で−１３．５℃であった。そこで、−１０℃〜４０
℃の温度範囲で、油脂中の脱脂性溶剤の濃度の温度依存
性を調べた。FIG. 7 is a graph showing the temperature dependence of the solvent recovery rate on the extraction temperature in relation to the low temperature water extraction step. Cutting oil (Yushiron Cut manufactured by Yushiro Kagaku Co., Ltd.) was used as the oil and fat causing stains, and a solvent aqueous solution of diethylene glycol diethyl ether having a concentration of 35 wt% was used as the degreasing solvent, and 3 wt% of the above oil and fat was dissolved. The freezing point of the above solvent aqueous solution having a concentration of 35 wt% was -13.5 ° C as an actual measurement value. Therefore, -10 ° C to 40
The temperature dependence of the concentration of the degreasing solvent in the oil and fat was investigated in the temperature range of ° C.
【００５２】図７から次のことが明らかである。 １）油脂中の溶剤の濃度は、油脂分離装置の温度レベル
である４０℃では、５３ｗｔ％であったが、３０℃では
３２ｗｔ％と急激に減少した。 ２）さらに温度を下げると、略直線的に６ｗｔ％／１０
℃の割合で減少した。−１０℃では９ｗｔ％程度である
から、油性汚れ分離装置の温度４０℃の時の濃度の１／
６程度に激減した。即ち、油脂に溶解して廃棄される溶
剤を大幅に低減できる。The following is clear from FIG. 1) The concentration of the solvent in the oil and fat was 53 wt% at 40 ° C, which is the temperature level of the oil and fat separation device, but rapidly decreased to 32 wt% at 30 ° C. 2) When the temperature is further lowered, it is approximately linearly 6 wt% / 10.
It decreased at a rate of ° C. Since it is about 9 wt% at -10 ° C, it is 1/100% of the concentration when the temperature of the oily soil separator is 40 ° C.
It has decreased sharply to about 6. That is, it is possible to greatly reduce the solvent that is dissolved in the oil and fat and is discarded.
【００５３】油性汚れ分離工程、及び、溶剤抽出工程、
特に低温水抽出工程を経た溶剤は、油性汚れを完全に分
離した溶剤水溶液である。油性汚れ分離工程で回収され
た溶剤水溶液は洗浄工程に戻し、溶剤抽出工程で回収さ
れた希薄溶剤水溶液は溶剤抽出工程に循環するとともに
濯ぎ洗浄工程に戻すことにより、洗浄体に随伴する溶剤
を最小限に抑えることができ、溶剤の効率的な再生利用
と溶剤抽出工程の効果的な操作を可能にする。Oily dirt separation step and solvent extraction step,
In particular, the solvent that has undergone the low temperature water extraction step is an aqueous solvent solution in which oily stains are completely separated. The solvent aqueous solution recovered in the oily dirt separation process is returned to the cleaning process, and the dilute solvent aqueous solution recovered in the solvent extraction process is circulated to the solvent extraction process and returned to the rinse cleaning process to minimize the solvent accompanying the cleaning object. It is possible to limit the amount of the solvent, and it is possible to efficiently reuse the solvent and effectively operate the solvent extraction process.
【００５４】次に、各請求項の作用を整理すると以下の
ようになる。 （請求項１の作用） １）溶剤水溶液は所定温度以上に加熱すると、高濃度溶
剤液と低濃度溶剤液の２相に分離される。 ２）２相分離した溶剤を攪拌すると、高濃度溶剤液が低
濃度溶剤液中に微粒子状に分散した洗浄液が形成され
る。 ３）洗浄物を前記洗浄液中に浸漬すると、洗浄物表面に
付着している油性汚れが高濃度溶剤液の微粒子と接触し
て溶解され除去される。 ４）油性汚れを溶解した高濃度溶剤液と低濃度溶剤液の
混合物を冷却すると、所定温度以下では、溶剤と水は均
一に混合する。この時の溶剤濃度は、高濃度溶剤液より
低くなるので、油性汚れが溶剤液から分離される。 ５）油性汚れは、均一濃度の溶剤液より比重が小さいの
で、溶剤液の上部に浮上して分離される。Next, the operation of each claim will be summarized as follows. (Operation of Claim 1) 1) When an aqueous solvent solution is heated to a predetermined temperature or higher, it is separated into two phases, a high concentration solvent solution and a low concentration solvent solution. 2) When the solvent having the two phases separated is stirred, a cleaning liquid in which the high-concentration solvent liquid is finely dispersed in the low-concentration solvent liquid is formed. 3) When the cleaning product is immersed in the cleaning liquid, oily stains adhering to the surface of the cleaning product come into contact with the fine particles of the high-concentration solvent liquid and are dissolved and removed. 4) When the mixture of the high-concentration solvent liquid and the low-concentration solvent liquid in which the oily stain is dissolved is cooled, the solvent and the water are uniformly mixed at a predetermined temperature or lower. Since the solvent concentration at this time is lower than that of the high-concentration solvent liquid, oily dirt is separated from the solvent liquid. 5) Oily dirt has a smaller specific gravity than a solvent solution having a uniform concentration, and therefore floats above the solvent solution and is separated.
【００５５】（請求項２の作用） １）溶剤水溶液は攪拌することにより高濃度溶剤液を微
粒子状になり、洗浄物との接触面積が増えるので、油性
汚れの溶解が促進される。したがって、油性汚れの溶解
効果即ち洗浄効果を増大する。(Operation of Claim 2) 1) The high-concentration solvent solution becomes fine particles by stirring the solvent aqueous solution, and the contact area with the cleaning product increases, so that the dissolution of oily dirt is promoted. Therefore, the dissolving effect of oily soil, that is, the cleaning effect is increased.
【００５６】（請求項３の作用） １）前記油性汚れ分離物に常温水（２５℃程度）を添加
して残存溶剤を抽出し、分離された溶剤は希薄溶剤水溶
液として回収される。(Operation of Claim 3) 1) Room temperature water (about 25 ° C.) is added to the oily dirt separated product to extract the residual solvent, and the separated solvent is recovered as a dilute aqueous solvent solution.
【００５７】（請求項４の作用） １）前記油性汚れ分離物に水を添加して溶剤抽出を行う
温度を下げるにしたがって、油性汚れ分離物の溶剤濃度
が低下し、水中に溶解する溶剤の量が増加するので、低
温水抽出では溶剤の回収濃度が上昇する。(Operation of claim 4) 1) As the temperature for solvent extraction by adding water to the oily soil separation product is lowered, the solvent concentration of the oily soil separation product is lowered and As the amount increases, the concentration of recovered solvent increases in low temperature water extraction.
【００５８】（請求項５の作用） １）水抽出による溶剤の回収率の観点のみでは、常温水
抽出と低温水抽出の順序に関係せず、低温水抽出を単独
で行う方がよい。 ２）しかし、油性汚れ分離工程で取り扱う溶液の量が比
較的多いので、均一に溶解可能な最低限度の温度に冷却
するのが、省エネ上好ましい。したがって、水抽出工程
の第１段で取り扱う油性汚れの温度は比較的高い。(Operation of Claim 5) 1) From the viewpoint of the recovery rate of the solvent by water extraction, it is better to perform the low temperature water extraction independently, regardless of the order of the room temperature water extraction and the low temperature water extraction. 2) However, since the amount of the solution handled in the oily soil separation step is relatively large, it is preferable to cool it to the minimum temperature at which it can be uniformly dissolved in terms of energy saving. Therefore, the temperature of the oily dirt handled in the first stage of the water extraction step is relatively high.
【００５９】３）また、洗浄工程では、２相分離温度以
上に加温するから、回収溶剤水溶液を直接再利用すると
きには、抽出前の温度以上に加熱される。この熱量はで
きるだけ少ない方が省エネ上好ましい。これは、水抽出
に要する水の量Ｗが少ないか、又は、抽出温度Ｔ2 が高
い方が好ましいことを意味する。 Ｑ＝Ｗ＊ｃ＊（Ｔ1 −Ｔ2 ） 但し、Ｔ1 ：洗浄工程の洗浄液の温度 Ｔ2 ：水抽出工程の水抽出温度 Ｗ＊ｃ：希薄溶剤液の熱容量 Ｗ：回収溶液の重量 ｃ：回収溶液の比熱3) Further, in the washing step, the temperature of the two-phase separation is heated to a temperature higher than the two-phase separation temperature. It is preferable that this amount of heat is as small as possible for energy saving. This means that it is preferable that the amount W of water required for water extraction is small or the extraction temperature T 2 is high. Q = W * c * (T 1 -T 2) where, T 1: temperature of cleaning liquid in the cleaning step T 2: water extraction the temperature of the water extraction step W * c: heat capacity of the lean solvent solution W: weight of the recovered solution c : Specific heat of recovered solution
【００６０】４）このように、溶剤の回収率の観点のみ
では常温水抽出と低温水抽出の順序を決め難いが、比重
分離の特質上、分離物の濃度が高い方が分離効率が高い
から、粗分離に続いて、精分離を行う方が効果的であ
る。即ち、第１段の常温水抽出で粗分離を行い、続いて
第２段の低温水抽出で精分離を行うのが合理的と考えら
れる。なお、最適条件は具体的な状況に合わせて適宜選
択すればよい。4) As described above, it is difficult to determine the order of normal temperature water extraction and low temperature water extraction only from the viewpoint of solvent recovery, but the higher the concentration of the separated substance is, the higher the separation efficiency is because of the characteristics of the specific gravity separation. It is more effective to carry out coarse separation followed by precise separation. That is, it is considered rational to perform the coarse separation by the first-stage normal temperature water extraction and then the fine separation by the second-stage low temperature water extraction. It should be noted that the optimum conditions may be appropriately selected according to the specific situation.
【００６１】（請求項６の作用） １）洗浄工程における水分の損失は、蒸散による損失
と、油性汚れ濃縮物に随伴する損失が主たるものであ
る。したがって、少なくともこの損失量に見合う量の水
を添加すれば、水量は一定に保持される。２）溶剤は、
殆ど完全に近く回収されるので、物質収支が保持され、
濃度管理は完全に行われる。(Operation of Claim 6) 1) The loss of water in the washing step is mainly due to the loss by evaporation and the loss associated with the oily soil concentrate. Therefore, the amount of water is kept constant by adding at least an amount of water commensurate with this amount of loss. 2) The solvent is
Almost completely recovered, so the mass balance is maintained,
Concentration control is completely done.
【００６２】（請求項７の作用） １）溶剤の回収率は、添加水量が油性汚れの重量の３倍
以内で、添加水量に比例して増加することが、ジエチレ
ングリコールジエチルエーテルによる実験で確認した。
なお、同系統の溶剤は基本的に同様の性質を示す。(Operation of Claim 7) 1) It was confirmed by an experiment using diethylene glycol diethyl ether that the recovery rate of the solvent increases in proportion to the amount of added water when the amount of added water is within 3 times the weight of oily soil. .
The solvents of the same series basically show similar properties.
【００６３】（請求項８の作用） １）油性汚れを分離した後、これを水で抽出して希薄溶
剤水溶液を回収する。なお、この希薄溶剤水溶液は、極
く僅かの油性分を含む。 ２）洗浄工程からの洗浄物には、油性汚れを溶解した洗
浄液が付着しているから、回収した希薄溶剤水溶液をス
プレして濯ぎ洗浄すれば、前記の油性汚れを溶解した洗
浄液を除去することができる。 ３）また、希薄溶剤水溶液中に存在する油性成分は防錆
効果を奏する。(Operation of Claim 8) 1) After separating oily soil, this is extracted with water to recover a dilute solvent aqueous solution. The diluted solvent aqueous solution contains a very small amount of oily component. 2) Since the cleaning liquid from which the oily dirt is dissolved is attached to the cleaning product from the cleaning step, the cleaning liquid in which the oily dirt is dissolved can be removed by spraying and washing the diluted diluted solvent aqueous solution. You can 3) Further, the oily component present in the dilute solvent aqueous solution has a rust preventive effect.
【００６４】（請求項９の作用） １）相分離温度を０〜８０℃の範囲で選択すれば、グリ
コール系の水溶性溶剤を１０〜６０ｗｔ％の範囲で使用
して所定の洗浄効果を得ることができる。(Operation of Claim 9) 1) If the phase separation temperature is selected in the range of 0 to 80 ° C., a predetermined cleaning effect is obtained by using the glycol-based water-soluble solvent in the range of 10 to 60 wt%. be able to.
【００６５】（請求項１０の作用） １）ここに記載のグリコール系の水溶性溶剤が、本発明
の効果を得るのに適している。(Operation of Claim 10) 1) The glycol-based water-soluble solvent described here is suitable for obtaining the effects of the present invention.
【００６６】（請求項１１の作用） １）溶剤水溶液は所定温度以上に加熱されると、高濃度
溶剤液と低濃度溶剤液の２相に分離する。 ２）２相分離した溶剤を攪拌すると、高濃度溶剤液が低
濃度溶剤液中に微粒子状に分散した洗浄液が形成され
る。 ３）洗浄物を前記洗浄液中に浸漬すると、洗浄物表面に
付着している油性汚れは高濃度溶剤液の微粒子と接触し
て溶解し、除去される。 ４）油性汚れを溶解した高濃度溶剤液と低濃度溶剤液の
混合物を冷却すると、所定温度以下では、溶剤と水は均
一に混合する。この時の溶剤濃度は、高濃度溶剤液より
低くなるので、油性汚れが溶剤液から分離される。 ５）油性汚れは、均一濃度の溶剤液より比重が小さいの
で、溶剤液の上部に浮上して分離される。(Operation of Claim 11) 1) When the aqueous solvent solution is heated to a predetermined temperature or higher, it is separated into two phases, a high concentration solvent solution and a low concentration solvent solution. 2) When the solvent having the two phases separated is stirred, a cleaning liquid in which the high-concentration solvent liquid is finely dispersed in the low-concentration solvent liquid is formed. 3) When the cleaning product is dipped in the cleaning liquid, oily stains adhering to the surface of the cleaning product come into contact with the fine particles of the high-concentration solvent liquid to be dissolved and removed. 4) When the mixture of the high-concentration solvent liquid and the low-concentration solvent liquid in which the oily stain is dissolved is cooled, the solvent and the water are uniformly mixed at a predetermined temperature or lower. Since the solvent concentration at this time is lower than that of the high-concentration solvent liquid, oily dirt is separated from the solvent liquid. 5) Oily dirt has a smaller specific gravity than a solvent solution having a uniform concentration, and therefore floats above the solvent solution and is separated.
【００６７】（請求項１２の作用） １）高濃度溶剤液の微粒化は、洗浄槽に付設する溶剤水
溶液の循環用導管の途中に設けたポンプ装置と、油性汚
れ分離装置と前記導管を往復的に連結する導管の接続部
に設けた弁装置で行われる。 ２）弁装置を切り替えれば、洗浄槽とポンプは単純な循
環回路で連結され、溶剤水溶液は前記ポンプで強制循環
されると同時に、ポンプを通過するときにポンプの動力
で強制的に攪拌され、高濃度溶液が微粒化して低濃度溶
液中に分散される。 ３）洗浄槽と油性汚れ分離装置を連結する通路をポンプ
通路でＨ型に連結し、連結部を３方向弁で接続して連結
部で開閉制御を行い、洗浄槽からポンプを経て油性汚れ
分離装置を結ぶ通路と、油性汚れ分離装置からポンプを
経て洗浄槽を結ぶ通路を形成することができ、前記ポン
プは溶剤水溶液の移送と攪拌の機能を奏することにな
る。(Operation of Claim 12) 1) The atomization of the high-concentration solvent liquid is performed by reciprocating the pump device provided in the middle of the circulation conduit for the solvent aqueous solution attached to the cleaning tank, the oily dirt separating device and the conduit. It is carried out by a valve device provided at the connection part of the conduits that are physically connected. 2) If the valve device is switched, the cleaning tank and the pump are connected by a simple circulation circuit, the solvent aqueous solution is forcibly circulated by the pump, and at the same time, it is forcibly stirred by the power of the pump when passing through the pump. The high concentration solution is atomized and dispersed in the low concentration solution. 3) The passage connecting the washing tank and the oily dirt separation device is connected to the H type by the pump passage, the connecting part is connected by a three-way valve, and the opening / closing control is performed at the connecting part, and the oily dirt is separated from the cleaning tank via the pump. A passage connecting the apparatus and a passage connecting the cleaning tank from the oily dirt separating device via the pump can be formed, and the pump has a function of transferring and stirring the aqueous solution of the solvent.
【００６８】（請求項１３の作用） １）溶剤抽出装置の給水管に常温水を供給すれば、油性
汚れ分離装置からの油性汚れ分離物と常温水が混合さ
れ、溶剤は常温水中に抽出され、油性汚れは浮上分離さ
れ、希薄溶剤水溶液は溶剤抽出装置の下部から回収され
る。(Operation of Claim 13) 1) When normal temperature water is supplied to the water supply pipe of the solvent extraction device, the oily dirt separation product from the oily dirt separation device is mixed with the room temperature water, and the solvent is extracted into the room temperature water. The oily dirt is floated and separated, and the dilute solvent aqueous solution is recovered from the lower part of the solvent extraction device.
【００６９】（請求項１４の作用） １）溶剤抽出装置の給水管に冷却器を設けて低温水を供
給するか、溶剤抽出槽内に冷却器を設けて油性汚れ分離
物と水との混合物を冷却すると、溶剤は低温水中に抽出
され、溶剤濃度の低い油性汚れが浮上分離され、希薄溶
剤水溶液は溶剤抽出装置の下部から回収される。(Operation of Claim 14) 1) A cooler is provided in the water supply pipe of the solvent extraction device to supply low temperature water, or a cooler is provided in the solvent extraction tank to provide a mixture of the oily soil separation product and water. When cooled, the solvent is extracted into low-temperature water, oily dirt with a low solvent concentration is floated and separated, and the dilute solvent aqueous solution is recovered from the lower part of the solvent extraction device.
【００７０】（請求項１５の作用） １）油性汚れ分離装置からの比較的溶剤濃度の高い分離
物は、常温水抽出装置で常温水抽出され、比較的溶剤濃
度の低い油性汚れ分離物は比重差で分離浮上し、溶剤は
常温水中に抽出され、希薄溶剤水溶液として回収され
る。 ２）常温水抽出装置で分離された比較的溶剤濃度の低い
油性汚れ分離物は、低温水抽出装置で低温抽出され、溶
剤濃度の極めて低い油性汚れ濃縮物は比重差で分離浮上
し、溶剤は低温水に溶解して希薄溶剤水溶液として回収
される。 ３）常温水抽出装置と低温水抽出装置で回収された希薄
溶剤水溶液は、配管で集められる。(Operation of Claim 15) 1) The separated product having a relatively high solvent concentration from the oily dirt separation device is extracted with ordinary temperature water by the normal temperature water extraction device, and the oily dirt separated product having a relatively low solvent concentration has a specific gravity. The solvent is separated and floated by a difference, the solvent is extracted into normal temperature water, and is recovered as a dilute solvent aqueous solution. 2) The oily soil separated substance with a relatively low solvent concentration separated by the room temperature water extraction device is low-temperature extracted by the low temperature water extraction device, and the oily soil concentrate with an extremely low solvent concentration separates and floats due to the difference in specific gravity, and the solvent It is dissolved in low temperature water and recovered as a dilute solvent aqueous solution. 3) The dilute solvent aqueous solution recovered by the room temperature water extractor and the low temperature water extractor is collected by piping.
【００７１】（請求項１６の作用） １）溶剤抽出装置の下部から排出された希薄溶剤水溶液
をポンプで送液し、かつ、その一部を溶剤抽出装置の上
部に送液する強制循環系を形成することができる。 ２）前記循環系に３方向弁を連結すれば、単一のポンプ
でも弁の切り替えにより希薄溶剤水溶液の送液と強制循
環を可能にし、混合が促進される。(Operation of Claim 16) 1) A forced circulation system for pumping the diluted solvent aqueous solution discharged from the lower part of the solvent extraction apparatus and sending a part thereof to the upper part of the solvent extraction apparatus. Can be formed. 2) If a three-way valve is connected to the circulation system, even with a single pump, switching of the valves enables liquid feeding of the dilute solvent aqueous solution and forced circulation, thereby promoting mixing.
【００７２】（請求項１７の作用） １）洗浄槽の上部に引き上げた洗浄物に対して、溶剤抽
出装置で回収した希薄溶剤水溶液をスプレして濯ぎ洗浄
することにより、洗浄物に残留する溶剤の回収と、希薄
溶剤水溶液中の微少の油性成分による防錆を可能とす
る。(Operation of Claim 17) 1) A solvent remaining in the cleaning product is sprayed on the cleaning product pulled up to the upper part of the cleaning tank by rinsing and cleaning with a diluted solvent aqueous solution recovered by a solvent extraction device. And the rust prevention by the minute oily component in the dilute solvent aqueous solution.
【００７３】[0073]
〔実施例１〕図２記載の脱脂洗浄装置を用い、切削油
（ユシロ化学社製、ユシロンカット）を１．３５ｋｇを
付着した被洗浄体を、濃度３５ｗｔ％のジエチレングリ
コールジエチルエーテル溶剤水溶液５００ｋｇ中に浸漬
して６０℃で洗浄処理した。図８は、その際の物質収支
を説明した図である。[Example 1] Using the degreasing and cleaning apparatus shown in Fig. 2, 1.35 kg of cutting oil (Yushiron Cut manufactured by Yushiro Kagaku Co., Ltd.) was adhered to a body to be cleaned, which was immersed in 500 kg of a diethylene glycol diethyl ether solvent aqueous solution having a concentration of 35 wt%. And washed at 60 ° C. FIG. 8 is a diagram explaining the material balance at that time.
【００７４】洗浄槽から油性汚れ分離装置に送られる溶
剤水溶液は、油性汚れ１．３５ｋｇ、溶剤１７．０３ｋ
ｇ及び水３１．６２ｋｇを含有していた。油性汚れ分離
装置では、４０℃に冷却されて分離回収され、洗浄槽に
戻される溶剤水溶液は、溶剤１５．０３ｋｇ及び水３
０．９７ｋｇを含有し、油性汚れ分離物は、油性汚れ
１．３５ｋｇ、溶剤２．００ｋｇ及び水０．６５ｋｇを
含有していた。The solvent aqueous solution sent from the cleaning tank to the oily soil separating device is 1.35 kg of oily soil and 17.03 k of solvent.
g and 31.62 kg of water. In the oily dirt separation device, the solvent aqueous solution which is cooled to 40 ° C., separated and collected, and returned to the cleaning tank is composed of 15.03 kg of solvent and 3 parts of water.
It contained 0.97 kg and the oily soil isolate contained 1.35 kg of oily soil, 2.00 kg of solvent and 0.65 kg of water.
【００７５】常温水抽出装置には、油性汚れ分離装置か
ら送られた油性汚れ分離物に、２５℃の常温水１０ｋｇ
が添加され、２７．８℃で溶剤抽出して溶剤１．３２ｋ
ｇ及び水９．９７ｋｇを含有する希薄溶剤水溶液を回収
し、油性汚れ１．３５ｋｇ、溶剤０．６８ｋｇ及び水
０．８２ｋｇからなる油性汚れ濃縮物は系外に廃棄し
た。前記希薄溶剤水溶液は、４０℃に加熱した後、洗浄
槽から引き上げられた洗浄物の濯ぎ洗浄に用いた。In the room temperature water extractor, 10 kg of room temperature water at 25 ° C. was added to the oily dirt separated product sent from the oily dirt separator.
Was added and the solvent was extracted at 27.8 ° C to obtain a solvent of 1.32k.
The dilute solvent aqueous solution containing g and 9.97 kg of water was recovered, and the oily soil concentrate consisting of 1.35 kg of oily soil, 0.68 kg of solvent and 0.82 kg of water was discarded outside the system. The diluted solvent aqueous solution was heated to 40 ° C., and then used for rinsing and washing of the washing product pulled out from the washing tank.
【００７６】〔実施例２〕図２記載の脱脂洗浄装置の溶
剤抽出装置内に冷却器を付設した図３の装置を用い、実
施例１の実験条件のうち、抽出温度を２７．８℃から−
１０℃に変更して低温抽出とした以外は実施例１と同様
にして洗浄処理を行った。その際の物質収支を図９に示
した。洗浄槽から油性汚れ分離装置に送られる溶剤水溶
液、及び、油性汚れ分離装置で分離される溶剤水溶液、
及び、油性汚れ分離物の油性汚れ、溶剤及び水の含有量
は実施例１と同じである。Example 2 Using the apparatus shown in FIG. 3 in which a condenser was attached to the solvent extraction apparatus of the degreasing / cleaning apparatus shown in FIG. 2, the extraction temperature was changed from 27.8 ° C. among the experimental conditions of Example 1. −
A washing treatment was performed in the same manner as in Example 1 except that the temperature was changed to 10 ° C. to perform low temperature extraction. The material balance in that case is shown in FIG. Aqueous solvent solution sent from the cleaning tank to the oily soil separation device, and an aqueous solvent solution separated by the oily soil separation device,
The contents of oily soil, solvent and water in the oily soil separation are the same as in Example 1.
【００７７】低温水抽出装置は、油性汚れ分離装置から
送られた油性汚れ分離物に２５℃の水を１０ｋｇ添加
し、冷却器で−１０℃に保持しながら低温水抽出を行
い、溶剤１．７２ｋｇ及び水９．８１ｋｇを含有する希
薄溶剤水溶液を回収し、その後、４０℃に加熱して洗浄
槽から引き上げられた洗浄物の濯ぎ洗浄に用いた。ま
た、油性汚れ１．３５ｋｇ、溶剤０．２８ｋｇ及び水
０．８４ｋｇからなる油性汚れ濃縮物は系外に廃棄し
た。The low temperature water extractor added 10 kg of water at 25 ° C. to the oily soil separation product sent from the oily soil separation device, and performed low temperature water extraction while maintaining the temperature at −10 ° C. in the cooler to obtain the solvent 1. A diluted solvent aqueous solution containing 72 kg and 9.81 kg of water was recovered, and then heated to 40 ° C. and used for rinsing and washing of the washed product pulled out from the washing tank. An oily soil concentrate consisting of 1.35 kg of oily soil, 0.28 kg of solvent and 0.84 kg of water was discarded outside the system.
【００７８】〔実施例３〕図２記載の脱脂洗浄装置の溶
剤抽出装置として常温水抽出装置と低温水抽出装置を２
段で用いた図４の装置を用い、実施例１の実験条件のう
ち、常温水抽出は２５℃の水を８ｋｇ添加して抽出温度
２７．８℃で常温水抽出を行い、低温水抽出は２５℃の
水を２ｋｇ添加して抽出温度−１０．０℃で低温水抽出
を行った以外は実施例１と同様にして洗浄処理を行っ
た。その際の物質収支を図１０に示した。洗浄槽から油
性汚れ分離装置に送られる溶剤水溶液、及び、油性汚れ
分離装置で分離される溶剤水溶液、及び、油性汚れ分離
物の油性汚れ、溶剤及び水の含有量は実施例１と同じで
ある。[Embodiment 3] A room temperature water extractor and a low temperature water extractor are used as solvent extractors of the degreasing and washing apparatus shown in FIG.
Using the apparatus of FIG. 4 used in the stage, among the experimental conditions of Example 1, for normal temperature water extraction, 8 kg of water at 25 ° C. was added to perform normal temperature water extraction at an extraction temperature of 27.8 ° C., and low temperature water extraction was performed. A washing treatment was performed in the same manner as in Example 1 except that 2 kg of water at 25 ° C was added and low temperature water extraction was performed at an extraction temperature of -10.0 ° C. The material balance in that case is shown in FIG. The solvent aqueous solution sent from the cleaning tank to the oily soil separation device, the solvent aqueous solution separated by the oily soil separation device, and the oily soil, solvent and water contents of the oily soil separation are the same as in Example 1. .
【００７９】常温水抽出装置には、油性汚れ分離装置か
らの油性汚れ分離物に、２５℃の常温水８ｋｇが添加さ
れ、抽出温度２７．８℃で常温水抽出を行い、溶剤１．
３５ｋｇ及び水７．８ｋｇを含有する希薄溶剤水溶液を
回収して濯ぎ洗浄に使用するとともに、油性汚れ１．３
５ｋｇ、溶剤０．６５ｋｇ及び水０．８５ｋｇからなる
油性汚れ分離物を分離して低温水抽出装置に送った。In the room temperature water extraction device, 8 kg of room temperature water at 25 ° C. was added to the oily soil separation product from the oily soil separation device, and room temperature water extraction was performed at an extraction temperature of 27.8 ° C.
A dilute solvent aqueous solution containing 35 kg and 7.8 kg of water was recovered and used for rinsing and washing, and oily stains 1.3
An oily soil separation product consisting of 5 kg of solvent, 0.65 kg of solvent and 0.85 kg of water was separated and sent to a low temperature water extractor.
【００８０】低温水抽出装置には、常温水抽出装置から
の油性汚れ分離物に２５℃の水が２ｋｇ添加され、冷却
器で−１０℃に保持して低温水抽出を行い、溶剤０．３
８ｋｇ及び水２．００ｋｇを含有する希薄溶剤水溶液を
回収して常温水抽出装置からの希薄溶剤水溶液と混合し
た後、４０℃に加熱して洗浄槽から引き上げられた洗浄
物の濯ぎ洗浄に用いた。また、油性汚れ１．３５ｋｇ、
溶剤０．２７ｋｇ及び水０．８５ｋｇからなる油性汚れ
濃縮物は系外に廃棄した。In the low temperature water extractor, 2 kg of water at 25 ° C. was added to the oily dirt separated product from the room temperature water extractor, and the low temperature water extraction was carried out by maintaining the temperature at −10 ° C. in the cooler to remove the solvent 0.3
A diluted solvent aqueous solution containing 8 kg and 2.00 kg of water was collected, mixed with a diluted solvent aqueous solution from a room temperature water extractor, and then heated to 40 ° C. and used for rinsing and washing of the washed product. . In addition, 1.35 kg of oily dirt,
The oily soil concentrate consisting of 0.27 kg of solvent and 0.85 kg of water was discarded outside the system.
【００８１】〔抽出方法の比較〕上記の常温抽出装置と
低温抽出装置と２段抽出装置について、油性汚れ分離装
置からの油性汚れ分離物（溶剤２．００ｋｇ含有）から
上記の抽出装置で回収された溶剤量と、回収に要した熱
量を対比すると次表のとおりであった。[Comparison of Extraction Methods] Regarding the above-mentioned room temperature extractor, low-temperature extractor and two-stage extractor, oily soil separated substances (containing 2.00 kg of solvent) from the oily soil separator were collected by the above extractor. The following table compares the amount of solvent used and the amount of heat required for recovery.
【００８２】[0082]
【表１】 [Table 1]
【００８３】以上のことから次の結論を得た。なお、熱
量に関しては廃棄物に随伴する熱量を無視した。 １）油性汚れ分離装置では、洗浄層からの溶剤水溶液中
の溶剤１７．０３ｋｇの内、１５．０３ｋｇを回収する
ことができ、回収率は８８．３％であった。 ２）実施例１の常温水抽出装置では、油性汚れ分離装置
からの油性汚れ分離物中の溶剤２．００ｋｇの内、１．
３２ｋｇを回収することができ、回収率を８８．３％か
ら９６．０％に向上させることができた。From the above, the following conclusions were obtained. Regarding the amount of heat, the amount of heat accompanying the waste was ignored. 1) In the oily soil separation device, 15.03 kg of the solvent of 17.03 kg in the aqueous solvent solution from the cleaning layer could be recovered, and the recovery rate was 88.3%. 2) In the room temperature water extractor of Example 1, of the 2.00 kg of solvent in the oily soil separation product from the oily soil separation device, 1.
32 kg could be recovered, and the recovery rate could be improved from 88.3% to 96.0%.
【００８４】３）実施例２の低温水抽出装置では、油性
汚れ分離装置からの油性汚れ分離物中の溶剤２．００ｋ
ｇの内、１．７２ｋｇを回収することができ、回収率を
８８．３％から９８．５％に向上させることができた。
しかし、常温水抽出装置を基準にして、所要熱量が８５
３ｋｃａｌだけ必要になった。 ４）実施例３で常温水抽出装置と低温水抽出装置を設置
して、添加水を８ｋｇと２ｋｇとして２段抽出を行う
と、回収溶剤量は１．７３ｋｇで低温抽出装置だけの場
合とほとんど同じであったが、所要熱量が１９２ｋｃａ
ｌと低温抽出装置だけの場合の２２．５％と大幅に低減
することができ、その経済性が明らかになった。3) In the low temperature water extraction apparatus of Example 2, the solvent 2.00 k in the oily soil separation product from the oily soil separation apparatus was used.
Of the g, 1.72 kg could be recovered, and the recovery rate could be improved from 88.3% to 98.5%.
However, the required amount of heat is 85
I only needed 3 kcal. 4) In Example 3, when a room temperature water extractor and a low temperature water extractor were installed and two-stage extraction was performed with added water of 8 kg and 2 kg, the amount of recovered solvent was 1.73 kg, which was almost the same as in the case of only the low temperature extractor. It was the same, but the required amount of heat was 192 kca
1 and 22.5% compared with the case of using only the low temperature extraction device, and the economic efficiency thereof was clarified.
【００８５】[0085]
【発明の効果】本発明は、上記の構成を採用することに
より、油性汚れの洗浄における溶剤の回収をより確実な
ものとし、洗浄コストの大幅な低減を可能にした。特
に、溶剤抽出工程を常温水抽出工程と低温水抽出工程に
分け、常温水抽出された浮上廃油を低温で抽出するとき
には、抽出水量を少なくして、エネルギー消費を大幅に
抑制することが可能になった。EFFECTS OF THE INVENTION By adopting the above-mentioned structure, the present invention makes it possible to more reliably recover the solvent in the cleaning of oily stains, and it is possible to greatly reduce the cleaning cost. In particular, when the solvent extraction process is divided into a room temperature water extraction process and a low temperature water extraction process, and the floating waste oil extracted from the room temperature water is extracted at a low temperature, the amount of water extracted can be reduced to greatly reduce energy consumption. became.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の脱脂洗浄方法の工程説明図である。FIG. 1 is a process explanatory diagram of a degreasing cleaning method of the present invention.
【図２】本発明の脱脂洗浄方法を実施するための装置の
１例を示した説明図である。FIG. 2 is an explanatory view showing an example of an apparatus for carrying out the degreasing and cleaning method of the present invention.
【図３】本発明の脱脂洗浄方法を実施するための装置の
１例を示したものであり、図２を変形させた装置の説明
図である。FIG. 3 shows an example of an apparatus for carrying out the degreasing and cleaning method of the present invention, and is an explanatory view of an apparatus obtained by modifying FIG.
【図４】本発明の脱脂洗浄方法を実施するための装置の
もう１つの例を示した説明図である。FIG. 4 is an explanatory view showing another example of an apparatus for carrying out the degreasing cleaning method of the present invention.
【図５】本発明で使用するジエチレングリコールジエチ
ルエーテル水溶液の相特性を示したグラフである。FIG. 5 is a graph showing phase characteristics of a diethylene glycol diethyl ether aqueous solution used in the present invention.
【図６】本発明の溶剤抽出工程における水添加量と溶剤
回収率の関係を示したグラフである。FIG. 6 is a graph showing the relationship between the amount of water added and the solvent recovery rate in the solvent extraction step of the present invention.
【図７】本発明の低温水抽出工程における、抽出温度に
対する溶剤回収率の温度依存性を示したグラフである。FIG. 7 is a graph showing the temperature dependence of the solvent recovery rate with respect to the extraction temperature in the low temperature water extraction step of the present invention.
【図８】実施例１における物質収支を示した図である。FIG. 8 is a diagram showing a material balance in Example 1.
【図９】実施例２における物質収支を示した図である。9 is a diagram showing a material balance in Example 2. FIG.
【図１０】実施例３における物質収支を示した図であ
る。FIG. 10 is a diagram showing a material balance in Example 3.
【図１１】従来の脱脂洗浄方法の原理図である。FIG. 11 is a principle diagram of a conventional degreasing cleaning method.
１ 洗浄槽、 ２ 油性汚れ分離装置、 ３ 溶剤抽出
装置、 ４ 溶剤水溶液、 ５ 洗浄体、 ６ 攪拌手
段、 １０ 切替弁、 １１ 循環ポンプ、１２ ろ過
器、 １３ 切替弁、 １４ 加熱器、 １６ 溢流
壁、 １７ 冷却器、 ２８ 循環ポンプ、 ２９ 切
替弁、 ３２ 加熱器、 ３３ スプレノズル、 ３４
冷却器 、３５ 常温水抽出装置、 ３６ 溢流壁、
４２低温水抽出装置、 ４４ 切替弁、 ４６ 循環
ポンプ。1 cleaning tank, 2 oily dirt separation device, 3 solvent extraction device, 4 solvent aqueous solution, 5 cleaning body, 6 stirring means, 10 switching valve, 11 circulation pump, 12 filter, 13 switching valve, 14 heater, 16 overflow Wall, 17 cooler, 28 circulation pump, 29 switching valve, 32 heater, 33 spray nozzle, 34
Cooler, 35 Room temperature water extractor, 36 Overflow wall,
42 low temperature water extraction device, 44 switching valve, 46 circulation pump.
フロントページの続き (72)発明者 杉山 茂広 愛知県名古屋市中村区岩塚町字高道１番地 三菱重工業株式会社名古屋研究所内 (72)発明者 広瀬 俊文 愛知県名古屋市中村区岩塚町字高道１番地 三菱重工業株式会社名古屋機器製作所内 (72)発明者 深堀 和實 愛知県名古屋市熱田区五本松町11番22号 株式会社中部プラントサービス技術開発部 内 (72)発明者 冨田 正和 愛知県名古屋市熱田区五本松町11番22号 株式会社中部プラントサービス技術開発部 内 (72)発明者 大脇 哲雄 愛知県知多郡武豊町字竜宮１番地の２ 株 式会社中部プラントサービス武豊事業所内 (72)発明者 高橋 清志 愛知県海部郡飛島村東浜３−５ 株式会社 中部プラントサービス西名古屋事業所内Continued Front Page (72) Inventor Shigehiro Sugiyama 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya, Aichi Prefecture, Nagoya Research Laboratory, Mitsubishi Heavy Industries, Ltd. (72) Toshifumi Hirose 1 Takamichi, Iwatsuka-machi, Nakamura-ku, Aichi Prefecture, Nagoya Address: Mitsubishi Heavy Industries, Ltd., Nagoya Machinery Works (72) Inventor: Kazuka Fukahori, 11-22 Gomotomatsucho, Atsuta-ku, Atsuta-ku, Nagoya, Aichi Prefecture (72) Inventor: Masakazu Tomita Atsuta, Nagoya-shi, Aichi Prefecture Chuo Plant Service Technology Development Department 11-22, Gohonmatsucho, Tokyo (72) Inventor Tetsuo Ohwaki 2 Stock Company Chubu Plant Service Taketoyo Office, 1 Ryugu, Taketoyo-cho, Chita-gun, Aichi Prefecture (72) Inventor Takahashi Kiyoshi, 3-5 Higashihama, Tobishima-mura, Kaifu-gun, Aichi Chubu Plant Service Co., Ltd. Inside Nishi Nagoya Works
Claims (17)
る水溶液に２相分離する特性を示す脱脂性溶剤水溶液を
用い、該溶剤水溶液が相分離する温度に加温して、高濃
度溶剤水溶液で油性汚染物を洗浄する工程と、前記洗浄
工程からの、油性汚れを含有する溶剤水溶液を前記相分
離温度より低い温度に冷却し、油性汚れ分離物を浮上さ
せて分離する工程と、前記油性汚れ分離物の分離工程か
らの油性汚れ分離物に水を添加し、残存溶剤を水で抽出
して希薄溶剤水溶液として回収する溶剤抽出工程とを有
することを特徴とする洗浄方法。1. A high-concentration solvent aqueous solution is prepared by using a degreasing solvent aqueous solution that exhibits two-phase separation into aqueous solutions having different concentrations at temperatures between the freezing point and the boiling point, and heating to a temperature at which the solvent aqueous solution undergoes phase separation. A step of washing the oily contaminants with, a step of cooling the solvent aqueous solution containing the oily stains from the washing step to a temperature lower than the phase separation temperature, and separating the oily soil separated matter by floating, And a solvent extraction step of adding water to the oily soil separation product from the separation process of the soil separation product and extracting the residual solvent with water to recover it as a dilute solvent aqueous solution.
拌して高濃度溶剤水溶液の微粒化処理を施し、該微粒に
より油性汚染物を洗浄することを特徴とする請求項１記
載の洗浄方法。2. The cleaning method according to claim 1, wherein in the cleaning step, the solvent aqueous solution is stirred to atomize the high-concentration solvent aqueous solution, and the oily contaminants are cleaned by the particles.
溶剤を抽出する抽出工程を、添加水として常温水を用い
る常温水抽出工程とすることを特徴とする請求項１又は
２記載の洗浄方法。3. The room temperature water extraction step of using room temperature water as added water, wherein the extraction step of adding water to the oily soiled matter to extract the residual solvent is a room temperature water extraction step. Cleaning method.
溶剤を抽出する抽出工程を、添加水の温度又は添加水と
油性汚れ分離物との混合物の温度を凝固点より高いが凝
固点に近い温度まで冷却して抽出を行う低温水抽出工程
とすることを特徴とする請求項１又は２記載の洗浄方
法。4. The extraction step in which water is added to the oily soil separation product to extract the residual solvent, the temperature of the added water or the temperature of the mixture of the added water and the oily soil separation is higher than the freezing point but close to the freezing point. The cleaning method according to claim 1 or 2, which is a low-temperature water extraction step of performing extraction by cooling to a temperature.
溶剤を抽出する抽出工程として、添加水として常温水を
用いる常温水抽出工程に続けて、添加水の温度又は添加
水と油性汚れ分離物との混合物の温度を凝固点より高い
が凝固点に近い温度まで冷却して抽出を行う低温水抽出
工程を設けるか、又は、前記低温水抽出工程に続けて前
記低温水抽出工程を設けることを特徴とする請求項１又
は２記載の洗浄方法。5. The temperature of the added water or the temperature of the added water and the oily stain are added to the step of extracting the residual solvent by adding water to the oily dirt separation product, following the normal temperature water extraction step using normal temperature water as the added water. To provide a low temperature water extraction step of performing extraction by cooling the temperature of the mixture with the separated product to a temperature higher than the freezing point but close to the freezing point, or to provide the low temperature water extraction step following the low temperature water extraction step. The cleaning method according to claim 1 or 2, which is characterized.
洗浄工程で加熱により大気中に蒸散する水の損失量、及
び、前記溶剤抽出工程で油性汚れとともに廃棄される水
の損失量の合計損失量に一致させ、前記溶剤分離工程及
び前記溶剤抽出工程で回収した溶剤水溶液を前記洗浄工
程に戻すことを特徴とする請求項１〜５のいずれか１項
に記載の洗浄方法。6. The amount of water added in the solvent extraction step is
Loss of water that evaporates into the atmosphere by heating in the washing step, and the total amount of loss of water that is discarded together with oily stains in the solvent extraction step, in the solvent separation step and the solvent extraction step. The cleaning method according to claim 1, wherein the recovered aqueous solvent solution is returned to the cleaning step.
油性汚れの重量の０．２〜３倍の範囲で選択することを
特徴とする請求項１〜６のいずれか１項に記載の洗浄方
法。7. The amount of water added in the solvent extraction step is
The cleaning method according to any one of claims 1 to 6, wherein the weight is selected in the range of 0.2 to 3 times the weight of the oily stain.
を濯ぎ洗浄する工程を設け、前記油性汚れ分離工程で回
収した溶剤水溶液を前記洗浄工程に戻して再利用し、ま
た、前記溶剤抽出工程で回収した希薄溶剤水溶液を前記
濯ぎ洗浄工程に戻して再利用することを特徴とする請求
項１〜７のいずれか１項に記載の洗浄方法。8. A step of rinsing and washing an object to be washed that has been completed after washing is performed, the aqueous solvent solution recovered in the oily dirt separating step is returned to the washing step and reused, and the solvent extracting step is performed. The cleaning method according to any one of claims 1 to 7, wherein the diluted solvent aqueous solution recovered in step 1 is returned to the rinse cleaning step and reused.
０℃の範囲にあり、溶剤濃度が１０〜６０ｗｔ％の範囲
で前記洗浄工程で使用することを特徴とする請求項１〜
８のいずれか１項に記載の洗浄方法。9. The phase separation temperature of the aqueous solvent solution is 0-8.
It is used in the cleaning step in the range of 0 ° C. and the solvent concentration is in the range of 10 to 60 wt%.
9. The cleaning method according to any one of 8 above.
リコールジエチルエーテル、又は、ジエチレングリコー
ルモノエチルエーテルアセテート、又は、ジエチレング
リコールジエチルエーテルとジエチレングリコールモノ
ブチルエーテルとの混合物を使用することを特徴とする
請求項９記載の洗浄方法。10. The cleaning method according to claim 9, wherein diethylene glycol diethyl ether, diethylene glycol monoethyl ether acetate, or a mixture of diethylene glycol diethyl ether and diethylene glycol monobutyl ether is used as the solvent aqueous solution.
なる水溶液に２相分離する特性を示す脱脂性溶剤水溶液
を用いて油性汚染物を洗浄する装置において、前記相分
離温度より高い温度で高濃度溶剤水溶液で油性汚染物を
洗浄する洗浄槽と、前記相分離温度より低い温度で油性
汚れ分離物を浮上させる油性汚れ分離装置と、前記油性
汚れ分離物に水を添加して希薄溶剤水溶液を回収する溶
剤抽出装置とからなり、前記洗浄槽には、前記相分離温
度より高い温度に加温する手段を介して前記洗浄槽に戻
す前記溶剤水溶液の循環用導管を接続し、該循環用導管
を分岐して前記油性汚れ分離装置に前記溶剤水溶液を送
液する導管を接続し、また、前記溶剤水溶液を導入する
前記油性汚れ分離装置には、回収溶剤水溶液を前記洗浄
槽に戻す導管を接続し、油性汚れ分離物を前記溶剤抽出
装置に送液する導管を接続し、前記油性汚れ分離物を導
入する前記溶剤抽出装置には、給水管及び油性汚れ濃縮
物排出管が接続され、かつ、該装置で回収された希薄溶
剤水溶液を前記洗浄槽に戻す導管を接続したことを特徴
とする洗浄装置。11. An apparatus for cleaning oily contaminants using an aqueous solution of a degreasing solvent, which has a characteristic of performing two-phase separation into an aqueous solution having different concentrations at a temperature between the freezing point and the boiling point, wherein the temperature is higher than the phase separation temperature. A cleaning tank for washing oily contaminants with a concentrated solvent aqueous solution, an oily soil separation device for floating oily soiled separations at a temperature lower than the phase separation temperature, and water added to the oily soiled separations to form a dilute solvent aqueous solution. A solvent extraction device for recovery, the cleaning tank is connected to a circulation conduit for the solvent aqueous solution which is returned to the cleaning tank through a means for heating to a temperature higher than the phase separation temperature, and the circulation conduit And a conduit for feeding the aqueous solvent solution to the oily soil separating device, and a conduit for returning the recovered aqueous solvent solution to the cleaning tank is connected to the oily soil separating device for introducing the aqueous solvent solution. Then, connecting a conduit for sending the oily soiled isolate to the solvent extractor, the solvent extractor for introducing the oily soil isolate is connected to a water supply pipe and an oily soil concentrate discharge pipe, and A cleaning apparatus, which is connected to a conduit for returning the diluted solvent aqueous solution recovered by the apparatus to the cleaning tank.
ポンプ装置を設け、前記油性汚れ分離装置で分離された
溶剤水溶液を前記洗浄槽に戻す導管を弁装置を介して接
続することにより、高濃度溶剤水溶液を微粒化すること
を特徴とする請求項１１記載の洗浄装置。12. A pump device is provided in the middle of the circulation conduit of the cleaning tank, and a conduit for returning the aqueous solvent solution separated by the oily dirt separating device to the cleaning tank is connected via a valve device. The cleaning device according to claim 11, wherein the high-concentration solvent aqueous solution is atomized.
離装置からの油性汚れ分離物と、給水管から供給される
常温水とを貯留する分離槽に、該分離槽で浮上分離され
た油性汚れ濃縮物を排出する排出管及び該分離槽から希
薄溶剤水溶液を回収する導管を接続した常温水抽出装置
であることを特徴とする請求項１１記載の洗浄装置。13. The solvent extraction device, wherein the oily dirt separated from the oily dirt separator is stored in a separation tank for storing the oily dirt separated product from the oily dirt separator and room temperature water supplied from a water supply pipe, and the oily dirt floated and separated in the separation tank. The washing apparatus according to claim 11, wherein the washing apparatus is a room temperature water extraction apparatus connected to a discharge pipe for discharging a concentrate and a conduit for collecting a diluted solvent aqueous solution from the separation tank.
離装置からの油性汚れ分離物と、給水管から供給される
水とを貯留する分離槽を有し、前記給水管又は前記分離
槽に冷却器を設け、該分離槽で低温で浮上分離された油
性汚れ濃縮物を排出する排出管及び該分離槽から希薄溶
剤水溶液を回収する導管を接続した低温水抽出装置であ
ることを特徴とする請求項１１記載の洗浄装置。14. The solvent extraction device has a separation tank for storing the oily dirt separated substance from the oily dirt separation device and water supplied from a water supply pipe, and is cooled in the water supply pipe or the separation tank. A low-temperature water extraction device, which is provided with a container and is connected to a discharge pipe for discharging the oily soil concentrate floated and separated at a low temperature in the separation tank and a conduit for collecting a dilute solvent aqueous solution from the separation tank. Item 11. The cleaning device according to item 11.
と、請求項１４に記載の低温水抽出装置を直列に配置
し、前記油性汚れ分離装置からの油性汚れ分離物を前記
常温水抽出装置に送る導管及び前記常温水抽出装置から
の油性汚れ分離物を前記低温水抽出装置に送る導管を接
続し、前記低温水抽出装置から最終的な油性汚れ濃縮液
を廃棄する排出管を接続し、前記常温水抽出装置及び前
記低温水抽出装置からの希薄溶剤水溶液回収用導管を接
続したことを特徴とする洗浄装置。15. The room temperature water extractor according to claim 13 and the low temperature water extractor according to claim 14 are arranged in series, and the oily soil separation product from the oily soil separator is the room temperature water extractor. A conduit for sending to the low temperature water extractor and a conduit for sending the oily soil separation from the normal temperature water extractor to the low temperature water extractor, and connecting a discharge pipe for discarding the final oily soil concentrate from the low temperature water extractor, A washing device, wherein a pipe for collecting a diluted solvent aqueous solution from the room temperature water extracting device and the low temperature water extracting device is connected.
収用導管にポンプを付設し、該ポンプの吸入側の前記回
収用導管を前記溶剤抽出装置の分離槽下部に接続し、該
ポンプの吐出側の前記回収用導管を該分離槽の上部に接
続することにより、回収希薄溶剤水溶液を該分離槽に強
制循環を可能としたことを特徴とする請求項１３〜１５
のいずれか１項に記載の洗浄装置。16. A pump is attached to the dilute solvent aqueous solution recovery conduit of the solvent extraction device, and the recovery conduit on the suction side of the pump is connected to the lower part of the separation tank of the solvent extraction device, and the discharge side of the pump. 16. The recovery dilute solvent aqueous solution can be forcedly circulated in the separation tank by connecting the recovery conduit to the upper portion of the separation tank.
The cleaning device according to any one of 1.
て油性汚染物の濯ぎ洗浄部を形成し、前記溶剤抽出装置
からの希薄溶剤水溶液回収用導管を前記スプレーに接続
したことを特徴とする請求項１１〜１６のいずれか１項
に記載の洗浄装置。17. A spray is disposed above the cleaning tank to form a rinse cleaning section for oily contaminants, and a conduit for collecting a dilute solvent aqueous solution from the solvent extraction device is connected to the spray. The cleaning device according to any one of claims 11 to 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20706796A JP3784892B2 (en) | 1995-08-25 | 1996-08-06 | Cleaning method and apparatus |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21702795 | 1995-08-25 | ||
| JP7-217027 | 1995-08-25 | ||
| JP20706796A JP3784892B2 (en) | 1995-08-25 | 1996-08-06 | Cleaning method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09122402A true JPH09122402A (en) | 1997-05-13 |
| JP3784892B2 JP3784892B2 (en) | 2006-06-14 |
Family
ID=26516043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20706796A Expired - Fee Related JP3784892B2 (en) | 1995-08-25 | 1996-08-06 | Cleaning method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3784892B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191890A (en) * | 2015-04-30 | 2016-12-07 | 宝山钢铁股份有限公司 | Strip cleaning liquid recycling plant and strip cleaning liquid circulation process method |
| JP2021104488A (en) * | 2019-12-26 | 2021-07-26 | 株式会社サイライズ | Degreasing equipment |
-
1996
- 1996-08-06 JP JP20706796A patent/JP3784892B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106191890A (en) * | 2015-04-30 | 2016-12-07 | 宝山钢铁股份有限公司 | Strip cleaning liquid recycling plant and strip cleaning liquid circulation process method |
| JP2021104488A (en) * | 2019-12-26 | 2021-07-26 | 株式会社サイライズ | Degreasing equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3784892B2 (en) | 2006-06-14 |
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