JP3096753B2 - Solvent regeneration method for dry cleaning equipment - Google Patents
Solvent regeneration method for dry cleaning equipmentInfo
- Publication number
- JP3096753B2 JP3096753B2 JP06053124A JP5312494A JP3096753B2 JP 3096753 B2 JP3096753 B2 JP 3096753B2 JP 06053124 A JP06053124 A JP 06053124A JP 5312494 A JP5312494 A JP 5312494A JP 3096753 B2 JP3096753 B2 JP 3096753B2
- Authority
- JP
- Japan
- Prior art keywords
- solvent
- dry cleaning
- ozone gas
- cleaning apparatus
- filter
- 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.)
- Expired - Fee Related
Links
- 239000002904 solvent Substances 0.000 title claims description 119
- 238000005108 dry cleaning Methods 0.000 title claims description 38
- 238000011069 regeneration method Methods 0.000 title claims description 10
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 71
- 239000007789 gas Substances 0.000 claims description 52
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 38
- 238000005406 washing Methods 0.000 claims description 29
- 239000003208 petroleum Substances 0.000 claims description 23
- 239000003463 adsorbent Substances 0.000 claims description 22
- 239000000356 contaminant Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 230000001172 regenerating effect Effects 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 239000004927 clay Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001882 dioxygen Inorganic materials 0.000 claims description 3
- 238000004043 dyeing Methods 0.000 claims description 3
- 239000003456 ion exchange resin Substances 0.000 claims description 3
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 2
- 230000004931 aggregating effect Effects 0.000 claims description 2
- 229910052570 clay Inorganic materials 0.000 claims description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 2
- 239000010457 zeolite Substances 0.000 claims description 2
- 239000002594 sorbent Substances 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 19
- 229910052799 carbon Inorganic materials 0.000 description 11
- 239000003344 environmental pollutant Substances 0.000 description 10
- 231100000719 pollutant Toxicity 0.000 description 10
- 239000004809 Teflon Substances 0.000 description 7
- 229920006362 Teflon® Polymers 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000011109 contamination Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000011045 prefiltration Methods 0.000 description 4
- 238000004821 distillation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- UOCLXMDMGBRAIB-UHFFFAOYSA-N 1,1,1-trichloroethane Chemical compound CC(Cl)(Cl)Cl UOCLXMDMGBRAIB-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011086 high cleaning Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は洗浄液として石油系の溶
剤を用いるドライクリーニング装置の溶剤再生方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for regenerating a solvent in a dry cleaning apparatus using a petroleum-based solvent as a cleaning liquid.
【０００２】[0002]
【従来技術】現在ドライクリーニングに使用される溶剤
には、石油系、フロン、トリクロロエタン、パークロロ
エチレンの４種類がある。この内最も多く消費されてい
る溶剤は石油系で、石油系の溶剤を使用するドライクリ
ーニング装置が最も多く使用されている。また、環境上
の問題からフロン、トリクロロエタンは全廃が予定され
ており、今後、更に石油系の溶剤を使用するドライクリ
ーニング装置の需要が増加すると予想される。2. Description of the Related Art There are four types of solvents currently used for dry cleaning: petroleum-based, chlorofluorocarbon, trichloroethane and perchloroethylene. Of these, the most consumed solvent is petroleum, and a dry cleaning apparatus using a petroleum solvent is most often used. CFCs and trichloroethane are scheduled to be completely abolished due to environmental problems, and it is expected that demand for dry cleaning devices using petroleum-based solvents will increase in the future.
【０００３】[0003]
【発明が解決しようとする課題】石油系溶剤を使用する
ドライクリーニング装置は溶剤を溶剤貯蔵タンクに貯蔵
し、それを循環させて使用するので、被洗浄物から溶出
する汚染物質によって、洗浄を行なう毎に溶剤は汚染さ
れ劣化して行く。通常、石油系の溶剤を使用するドライ
クリーニング機においては、溶剤に溶出する汚染物質を
除去するためフィルタが取り付けられているが、このフ
ィルタでは極く細かい浮遊物や溶解性の汚れは除去でき
ない。A dry cleaning apparatus using a petroleum-based solvent stores the solvent in a solvent storage tank and circulates the solvent, so that cleaning is performed by contaminants eluted from an object to be cleaned. Each time the solvent is contaminated and degraded. Usually, in a dry cleaning machine using a petroleum-based solvent, a filter is attached to remove contaminants eluted in the solvent. However, this filter cannot remove extremely fine suspended matters or soluble dirt.
【０００４】また、フィルターに活性炭のような吸着剤
を内蔵したものを使用したり、フィルタと吸着剤を併用
するものもある。この場合はフィルタでは除去しきれな
い微細な浮遊物や溶解性の汚れも除去できるが、完全で
はなく、徐々に溶剤中に汚れ成分が蓄積される。そして
吸着剤の性能が低下すると溶剤の汚れが急激に進行す
る。[0004] Some filters use a built-in adsorbent such as activated carbon in a filter, and some use a filter and an adsorbent together. In this case, fine suspended matter and soluble dirt which cannot be completely removed by the filter can be removed, but the dirt is not completely removed and the dirt component is gradually accumulated in the solvent. Then, when the performance of the adsorbent decreases, the contamination of the solvent proceeds rapidly.
【０００５】上記吸着剤の寿命は被洗浄物の汚れや洗浄
の状況によって左右されるが、１日に７００ｋｇ程度の
被洗浄物を、１回に２０〜２５ｋｇずつバッチ式で洗浄
するバッチ洗いと溶剤をオーバーフローし、フィルタを
通して循環させ洗浄するフィルタ循環洗いとを組み合わ
せ８分程度洗浄する方法だと、３〜７日で吸着剤の性能
が低下する。このため溶剤を常に清浄な状態に保つのは
作業者にとって大きな作業負担となり、経済的にも大き
な負担になる上、このように行なっても洗浄力の回復及
び洗濯効果は充分ではなかった。また、汚れを除去しな
いまま汚れの進行した溶剤を使用すると被洗浄物の逆汚
染を引き起こし、品質の低下を招くことになる。[0005] The life of the adsorbent depends on the contamination of the object to be cleaned and the condition of the cleaning, and there are two types of batch washing in which about 700 kg of the object to be cleaned is batch-washed at a time in an amount of 20 to 25 kg at a time. The method of washing for about 8 minutes in combination with the filter circulation washing, in which the solvent overflows and circulates through the filter for washing, reduces the performance of the adsorbent in 3 to 7 days. For this reason, keeping the solvent in a clean state always imposes a heavy work burden on the operator, which imposes a heavy burden on the economy, and the recovery of detergency and the washing effect are not sufficient even if performed in this manner. In addition, if a solvent with advanced stains is used without removing the stains, reverse contamination of the object to be cleaned is caused, resulting in deterioration in quality.
【０００６】また、蒸留を組み合わせた溶剤浄化方法も
あるが、蒸留では溶剤浄化処理量に限界があり、洗浄に
より常に汚れが追加される循環式のドライクリーニング
機にあっては、溶剤を常に一定レベル以上の清浄な状態
に保つことは困難であった。There is also a solvent purification method that combines distillation. However, the amount of solvent purification processing is limited by distillation, and in a circulating dry cleaning machine in which dirt is always added by washing, the solvent is always fixed. It was difficult to keep it above the level of cleanliness.
【０００７】本発明は上述の点に鑑みてなされたもので
上記問題点を除去し、石油系の溶剤を清浄に保つことが
できるドライクリーニング装置の溶剤再生方法を提供す
ることを目的とする。[0007] The present invention has been made in view of the above points, and an object of the present invention is to eliminate the above problems and to provide a solvent regenerating method for a dry cleaning apparatus capable of keeping petroleum-based solvents clean.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
請求項１に記載の発明は、洗濯槽、溶剤貯蔵タンク、循
環ポンプを具備し、溶剤貯蔵タンク内の石油系溶剤を前
記循環ポンプで洗濯槽に供給し、該洗濯槽から貯蔵タン
クに戻すように構成されたドライクリーニング装置の溶
剤再生方法であって、洗浄により被洗浄物より溶出した
汚染物質を含む石油系の溶剤に濃度７０体積％以上の酸
素ガスを原料として放電により発生させたオゾンガスを
注入し、該汚染物質を酸化・分解・凝集させた後、該溶
剤をフィルタ及び吸着剤を通して該汚染物質を除去して
該溶剤を浄化再生することを特徴とする。[MEANS FOR SOLVING THE PROBLEMS]
The invention according to claim 1 is provided with a washing tub, a solvent storage tank, and a circulation pump, and uses a petroleum-based solvent in the solvent storage tank in advance.
A method for regenerating a solvent in a dry cleaning device configured to supply to a washing tub with a circulation pump and to return to the storage tank from the washing tub, wherein a petroleum-based solvent containing contaminants eluted from an object to be washed by washing. Acid with a concentration of 70% by volume or more
Injecting ozone gas generated by electric discharge using raw gas as a raw material, oxidizing, decomposing, and aggregating the contaminants, removing the contaminants through a filter and an adsorbent, and purifying and regenerating the solvent. It is characterized by.
【０００９】請求項２に記載の発明は、請求項１に記載
のドライクリーニング装置の溶剤再生方法において、オ
ゾンガスは微細気泡化して溶剤中に注入することを特徴
とする。 The invention according to claim 2 is the invention according to claim 1.
In the method for regenerating a solvent in a dry cleaning apparatus, the ozone gas is formed into fine bubbles and injected into the solvent.
【００１０】請求項３に記載の発明は、請求項１又は２
に記載のドライクリーニング装置の溶剤再生方法におい
て、オゾンガスは洗濯槽通過後で且つフィルタの通過前
の溶剤中に注入することを特徴とする。[0010] The invention described in claim 3 is the invention according to claim 1 or 2.
Solvent regeneration method for dry cleaning equipment described in
The ozone gas is injected into the solvent after passing through the washing tub and before passing through the filter.
【００１１】請求項４に記載の発明は、請求項１又は２
又は３に記載のドライクリーニング装置の溶剤再生方法
において、オゾンガスの注入をドライクリーニング装置
の運転と連動させ、該ドライクリーニング装置の運転時
のみオゾンガスを注入することを特徴とする。 The invention described in claim 4 is the first or second invention.
Or a method for regenerating a solvent in a dry cleaning device according to item 3.
Wherein the injection of the ozone gas is linked with the operation of the dry cleaning device, and the ozone gas is injected only during the operation of the dry cleaning device.
【００１２】請求項５に記載の発明は請求項１乃至４の
いずれか１つに記載のドライクリーニング装置の溶剤再
生方法において、吸着剤は活性炭、又は活性アルミナ、
又は活性白土、又は活性炭、活性アルミナ及び活性白土
のそれぞれとゼオライト又はシリカゲル又はイオン交換
樹脂との組合せか、又はこれらを吸着する物質に応じて
組合せたものであることを特徴とする。 The invention according to claim 5 is the invention according to claims 1 to 4.
Solvent re-use of the dry cleaning device described in any one of
In raw method, adsorbent activated carbon, or activated alumina,
Or activated clay, or activated carbon, or a combination of the respective active alumina and activated clay and zeolite, or silica gel or ion exchange resins, or wherein the these is a combination according to the substance to be adsorbed.
【００１３】[0013]
【作用】請求項１に記載の発明は、汚染物質を含む石油
系の溶剤にオゾンガスを注入するので、オゾンガスの作
用によって、溶剤中の汚染物質が酸化・分解・凝集し、
フィルタ及び吸着剤で該汚染物質を除去することが容易
になる。また、オゾンガスは濃度７０体積％以上の酸素
ガスを原料として放電により発生させたオゾンガスを注
入することにより、オゾン化空気のように窒素酸化物
（ＮＯｘ）が多く存在しないから、例えば吸着剤に活性
炭を用いても窒素酸化物が活性炭に作用して爆発すると
いう問題はなくなる。 [Action] The invention according to claim 1, and injects ozone gas in the solvent of petroleum containing pollutants, by the action of the ozone gas, pollutants are oxidized and decomposed and aggregated in a solvent,
Easy to remove soil dyeing quality filter and adsorbent
become. The ozone gas is oxygen having a concentration of 70% by volume or more.
Inject ozone gas generated by discharge using gas as raw material
Injects nitrogen oxides like ozonated air
Since there is not much (NOx), for example, it is active as an adsorbent
Even if charcoal is used, when nitrogen oxides act on activated carbon and explode
That problem is gone.
【００１４】請求項２に記載の発明は、オゾンガスを散
気管の微細孔を通して石油系溶剤に注入するので、オゾ
ンガスと溶剤の接触面積が大きくなり、オゾンと汚染物
質との作用効率が高くなり、汚染物質が効率良く酸化・
分解・凝集する。According to the second aspect of the present invention, since the ozone gas is injected into the petroleum-based solvent through the fine holes of the air diffuser, the contact area between the ozone gas and the solvent is increased, and the ozone gas and the pollutant are contaminated.
The higher the working efficiency of the quality, oxidation and pollutants efficiently
Decomposes and aggregates.
【００１５】請求項３に記載の発明は、オゾンガスの注
入は洗濯機の後で且つフィルタの前の溶剤循環経路に設
けることにより、最も汚染度の高い溶剤にオゾンが作用
し、該作用を受け酸化・分解・凝集した汚染物質は速や
かにフィルタや吸着剤で除去されるから、効率よく溶剤
の浄化ができる。According to the third aspect of the present invention, the ozone gas is injected into the solvent circulation path after the washing machine and before the filter so that ozone acts on the most polluted solvent, and the ozone gas is affected by the action. Since the oxidized, decomposed, and aggregated contaminants are quickly removed by the filter or the adsorbent, the solvent can be efficiently purified.
【００１６】[0016]
【００１７】[0017]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１は本発明の溶剤再生方法を採用する石油系の
溶剤を用いるドライクリーニング装置の構成を示す図で
ある。本ドライクリーニング装置は、ドライクリーニン
グ機１、熱交換器９及びオゾン発生装置１０からなり、
ドライクリーニング機１は、溶剤貯蔵タンク２、ボタン
トラップ３、プレフィルタ４、循環ポンプ５、カートリ
ッジフィルタタンク６、カーボンタンク７及び洗濯槽８
を具備する。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a dry cleaning apparatus using a petroleum-based solvent employing the solvent regeneration method of the present invention. The present dry cleaning device includes a dry cleaning machine 1, a heat exchanger 9, and an ozone generator 10,
The dry cleaning machine 1 includes a solvent storage tank 2, a button trap 3, a pre-filter 4, a circulation pump 5, a cartridge filter tank 6, a carbon tank 7, and a washing tub 8.
Is provided.
【００１８】ボタントラップ３は溶剤に含まれるボタン
等の大きい異物を除去するためのもので、該ボタントラ
ップ３の底面に散気管１１を接触させて配設されてお
り、散気管１１にオゾン発生装置１０からオゾンガスを
配管Ｒ３で導き、該散気管１１の微細孔を通して微細気
泡化されたオゾンガスを溶剤（石油系溶剤）中に注入す
る。オゾンガスと接触した溶剤は、オゾンと洗浄により
溶剤に混入した汚染物質とが反応しながらボタントラッ
プ３から溶剤貯蔵タンク２に入る。なお、散気管１１を
ボタントラップ３の底面に配置する理由は、微細気泡化
されたオゾンガスと溶剤の接触時間を長くするためであ
り、ボタントラップ３には散気管１１の上に１０ｃｍ以
上の溶剤の層ができる程度の液深が必要である。ボタン
トラップ３の底面に散気管１１を接触させて配置する理
由は帯電防止のためである。The button trap 3 is for removing large foreign substances such as buttons contained in the solvent. The button trap 3 is disposed so that an air diffuser 11 is in contact with the bottom surface of the button trap 3. Ozone gas is introduced from the apparatus 10 through a pipe R3, and the ozone gas, which has been made into fine bubbles, is injected into a solvent (a petroleum-based solvent) through the fine holes of the air diffuser 11. The solvent that has come into contact with the ozone gas enters the solvent storage tank 2 from the button trap 3 while the ozone reacts with the contaminants mixed in the solvent by washing. The reason why the air diffuser 11 is disposed on the bottom surface of the button trap 3 is to increase the contact time between the solvent and the ozone gas formed into fine bubbles. It is necessary to have a liquid depth enough to form a layer. The reason why the air diffuser 11 is placed in contact with the bottom surface of the button trap 3 is to prevent static electricity.
【００１９】循環ポンプ５により溶剤貯蔵タンク２から
プレフィルタ４を通し吸い上げられた溶剤は、該プレフ
ィルタ４で大きめの浮遊物が除去され、溶剤循環路Ｒ１
を流れて行く。該溶剤は溶剤循環路Ｒ１に順次配置され
たカートリッジフィルタタンク６及びカーボンタンク７
を通って洗濯槽８に流入する。該洗濯槽８内で被洗浄物
を洗浄した溶剤は該洗濯槽８の排出口から排出され、ボ
タントラップ３を通って溶剤貯蔵タンク２に戻る。The solvent sucked up from the solvent storage tank 2 through the pre-filter 4 by the circulation pump 5 is used to remove large suspended matters by the pre-filter 4, and the solvent circulation path R1
Go through. The solvent is supplied to the cartridge filter tank 6 and the carbon tank 7 sequentially arranged in the solvent circulation path R1.
Through the washing tub 8. The solvent that has washed the object to be washed in the washing tub 8 is discharged from the outlet of the washing tub 8 and returns to the solvent storage tank 2 through the button trap 3.
【００２０】カートリッジフィルタタンク６にはカート
リッジの紙フィルタが内蔵されており、カーボンタンク
７には活性炭が内蔵されている。オゾンと反応して酸化
・分解・凝集した溶剤中の汚染物質は、前記カートリッ
ジフィルタタンク６内のカートリッジの紙フィルタとカ
ーボンタンク７内の活性炭によって捕集・吸着されて除
去される。汚染物質が除去され清浄になった溶剤は循環
路Ｒ１を通って洗濯槽８に供給される。また、洗濯槽８
が停止している場合と洗濯槽８に溶剤を溜めてバッチ洗
いをしている場合は、循環路Ｒ１からカーボンタンク７
の下流で分岐する循環路Ｒ２へ流入し、洗濯槽８を経由
せず溶剤貯蔵タンク２へ直接戻るようになっている。な
お、熱交換器９は溶剤の温度を下げるため（溶剤の引火
点以下の温度）の熱交換器である。The cartridge filter tank 6 contains a paper filter for the cartridge, and the carbon tank 7 contains activated carbon. The contaminants in the solvent that have been oxidized, decomposed and aggregated by reacting with ozone are collected and adsorbed by the paper filter of the cartridge in the cartridge filter tank 6 and the activated carbon in the carbon tank 7 and removed. The solvent from which the contaminants have been removed and cleaned is supplied to the washing tub 8 through the circulation path R1. In addition, washing tub 8
Is stopped, and when the batch is washed by storing the solvent in the washing tub 8, the carbon tank 7 is removed from the circulation path R1.
And flows directly into the solvent storage tank 2 without passing through the washing tub 8. The heat exchanger 9 is a heat exchanger for lowering the temperature of the solvent (a temperature lower than the flash point of the solvent).
【００２１】上記構成のドライクリーニング装置におい
て、例えば、石油系溶剤の循環量は３００リットル／ｍ
ｉｎであり、溶剤貯蔵タンク２内に保有されている溶剤
の液量は７００〜７５０リットルとすれば、溶剤は約
２．５分に１回は新たなオゾンガスと接触することにな
り、その中の汚染物はオゾンと反応して酸化・分解・凝
集し、フィルタや吸収剤により捕集除去され、清浄化さ
れる。従って、オゾンガスの注入はドライクリーニング
装置の運転時にのみ行なえば溶剤の浄化・再生ができ
る。In the dry cleaning apparatus having the above structure, for example, the circulation amount of the petroleum solvent is 300 liter / m.
If the liquid volume of the solvent held in the solvent storage tank 2 is 700 to 750 liters, the solvent comes into contact with new ozone gas about once every 2.5 minutes. The contaminants are oxidized, decomposed and aggregated by reacting with ozone, collected and removed by a filter or an absorbent, and purified. Therefore, if the ozone gas is injected only during the operation of the dry cleaning device, the solvent can be purified and regenerated.
【００２２】図２は散気管１１の構造例を示す図であ
る。散気管１１はテフロン製のチューブ１１−１の先端
にテフロン製の球１１−２を取り付けた構造で、該球１
１−２には孔径１０〜１００μｍの多数の微細孔が形成
されている。テフロン製の球１１−２はボタントラップ
の底面に接して配置されており、該テフロン製のチュー
ブ１１−１を通して該球１１−２にオゾン発生装置１０
からオゾン（Ｏ3）ガスを送り、該球１１−２の多数の
微細孔からオゾンガスを微細気泡化して溶剤中に噴出し
て注入する。FIG. 2 is a view showing an example of the structure of the air diffuser 11. The diffuser 11 has a structure in which a Teflon ball 11-2 is attached to the tip of a Teflon tube 11-1.
In 1-2, a large number of fine holes having a hole diameter of 10 to 100 μm are formed. The Teflon ball 11-2 is disposed in contact with the bottom surface of the button trap, and is passed through the Teflon tube 11-1 to the ozone generator 10 through the Teflon tube 11-1.
An ozone (O 3 ) gas is sent from the sphere 11-2, and the ozone gas is made into fine bubbles from a number of fine holes of the sphere 11-2, and is injected into the solvent by injection.
【００２３】なお、散気管１１のオゾンガスを噴出する
微細孔は孔径には制約はないが、オゾンガスと溶剤の接
触面積を大きくし、効率よく汚染物とオゾンを反応させ
るためには、圧損のかからない範囲でできるだけ小さい
方がよい。また、オゾンガスを散気する散気部もテフロ
ン製に限定されるものではなくステンレス鋼（ＳＵＳ）
でもよく、例えば、図３に示すようにステンレス鋼（Ｓ
ＵＳ）の管１１−４の端部に側壁に多数の微細孔を設け
たメッシュ管１１−５を接続してなる散気管にテフロン
製のチューブ１１−１を継手を介して接続した構造のも
のでもよい。Although there is no limitation on the diameter of the fine holes in the air diffuser 11 from which the ozone gas is spouted, no pressure loss is applied in order to increase the contact area between the ozone gas and the solvent and efficiently react the contaminants with ozone. The smaller the better, the better. Also, the diffuser for diffusing the ozone gas is not limited to Teflon, but is made of stainless steel (SUS).
For example, as shown in FIG. 3, stainless steel (S
A structure in which a Teflon tube 11-1 is connected via a joint to a diffuser tube formed by connecting a mesh tube 11-5 having a large number of fine holes in the side wall at the end of a US 11) tube 11-4 May be.
【００２４】また、ドライクリーニング装置の散気管１
１の設置個所は、図１に示すようにボタントラップ３内
に限定されるものではなく、循環路の洗濯槽８の後でカ
ートリッジフィルタタンク６及びカーボンタンク７の前
であれば良く、散気管１１の挿入が簡便な箇所を選択す
ればよい。また、散気管１１の設置に際しては、上述の
ように帯電防止のため設置する箇所の壁面に必ず散気管
１１の側面を接触させることが必要である。The diffuser 1 of the dry cleaning device
1 is not limited to the inside of the button trap 3 as shown in FIG. 1, but may be any place after the washing tub 8 in the circulation path and before the cartridge filter tank 6 and the carbon tank 7. What is necessary is just to select the place where insertion of 11 is easy. Also, when installing the diffuser tube 11, it is necessary to make the side surface of the diffuser tube 11 always contact the wall surface of the place where the diffuser tube 11 is installed for preventing static electricity as described above.
【００２５】本実施例において、オゾンガスを上記散気
管１１を用いて、上述の方法で、１日に８〜１０時間、
オゾン量を最大９ｇ／ｈとして、２か月間注入したとこ
ろ、オゾンガス注入開始当初から、波長５００ｎｍの光
の透過率を常に９０％以上に保つことができ、浮遊成分
のない非常に透明度の高い清浄な溶剤を供給することが
できた。また、適宜行なった再汚染試験布による再汚染
テストにおいても再汚染は確認されず、溶剤が清浄に保
たれることがわかった。更に洗浄力テストにおいて、常
に安定した高い洗浄率が得られることが確認でき、溶剤
が良好な状態に保たれていることが分かった。In the present embodiment, ozone gas is diffused for 8 to 10 hours per day by the above-mentioned method using the above-mentioned diffuser tube 11.
When the ozone amount was set to 9 g / h at the maximum and the ozone gas was injected for two months, the transmittance of light having a wavelength of 500 nm can be always maintained at 90% or more from the beginning of the injection of the ozone gas, and a very transparent cleaner having no floating components. Solvent could be supplied. In addition, no recontamination was confirmed in a recontamination test using an appropriately performed recontamination test cloth, and it was found that the solvent was kept clean. Further, in the cleaning power test, it was confirmed that a stable and high cleaning rate was always obtained, and it was found that the solvent was kept in a good state.
【００２６】また、上記実施例では循環路中のオゾンガ
スの汚染物に対する酸化・分解・凝集作用とカートリッ
ジフィルタタンク６内のフィルタ及びカーボンタンク７
内の活性炭による汚染物の除去吸着作用を組み合わせて
浄化・再生を行なうので、石油系の溶剤を用いるドライ
クリーニング装置に適した循環量で該ドライクリーニン
グ機１を運転していれば、常に溶剤を清浄な状態に保つ
ことができ、洗浄による溶剤の汚染度変動に対しても清
浄回復度を速くできる。In the above embodiment, the oxidizing, decomposing and coagulating actions of the ozone gas in the circulation path on the contaminants, the filter in the cartridge filter tank 6 and the carbon tank 7
Purification and regeneration are performed by combining the removal and adsorption of contaminants by activated carbon in the interior. Therefore, if the dry cleaning machine 1 is operated at a circulation amount suitable for a dry cleaning apparatus using a petroleum-based solvent, the solvent is always removed. It can be kept in a clean state, and the degree of clean recovery can be increased even when the degree of contamination of the solvent due to cleaning is changed.
【００２７】上記のようにカーボンタンク７には活性炭
が収容されており、溶剤中に注入するオゾンガスに空気
を原料として放電により生成したオゾン、即ちオゾン化
空気を用いた場合、該オゾン化空気をカーボンタンク７
内の活性炭を通すと爆発する恐れがあった。これはオゾ
ン化空気の中に存在する窒素酸化物（ＮＯｘ）が原因と
考えられている。そこで、本実施例では純度７０ｖｏｌ
％以上の酸素ガスを原料として放電して生成させたオゾ
ンガスを用いる。Activated carbon is stored in the carbon tank 7 as described above. When ozone generated by electric discharge using air as a raw material, ie, ozonized air, is used as the ozone gas to be injected into the solvent, the ozonized air is converted to ozone gas. Carbon tank 7
There was a risk of explosion if activated carbon was passed through. This is believed to be due to nitrogen oxides (NOx) present in the ozonized air. Therefore, in this embodiment, the purity is 70 vol.
% Ozone gas generated by discharge using oxygen gas as a raw material is used.
【００２８】図４は公知のオゾン発生装置１０の構成例
を示す図である。オゾン発生装置１０は、コンプレッサ
１０−１、酸素発生装置１０−２、放電体１０−３及び
電源１０−４で構成され、コンプレッサ１０−１で空気
を圧縮し、酸素発生装置１０−２に送り、酸素発生装置
１０−２で窒素Ｎ2と酸素Ｏ2を分離し、酸素Ｏ2のみを
選別する。この選別した酸素Ｏ2を放電体１０−３に送
り、放電体１０−３で電源１０−４からの高電圧により
放電させ、オゾンＯ3ガスを生成し、配管Ｒ３を通して
図１の散気管に送る。FIG. 4 is a diagram showing an example of the configuration of a known ozone generator 10. As shown in FIG. The ozone generator 10 includes a compressor 10-1, an oxygen generator 10-2, a discharger 10-3, and a power supply 10-4. The compressor 10-1 compresses air and sends the compressed air to the oxygen generator 10-2. the nitrogen N 2 and oxygen O 2 separated by the oxygen generator 10-2 to select only oxygen O 2. Sends the selected oxygen O 2 in the discharge member 10-3, the discharge member 10-3 is discharged by a high voltage from the power supply 10-4 generates ozone O 3 gas, the diffusing pipe 1 through the pipe R3 send.
【００２９】上記実施例ではカートリッジフィルタタン
ク６及びカーボンタンク７、即ちフィルタと吸着剤を組
み込んだドライクリーニング機１のボタントラップ３に
散気管１１を設け、該散気管１１にオゾン発生装置１０
からオゾンガスを送るようにした例を示したが、ドライ
クリーニング機１はこれに限定されるものではなく、溶
剤貯蔵タンク、フィルタ及び吸着剤は外部に設けてもよ
い。例えば洗濯槽８から排出される溶剤をドライクリー
ニング機１の外に導き、この溶剤に微細気泡化したオゾ
ンガスを注入し、溶剤中の汚染物質をオゾンガスの作用
で、酸化・分解・凝集し、ドライクリーニング機１の外
部に設けたフィルタ及び吸着剤で捕集・吸着して除去
し、清浄した溶剤を外部に設けた溶剤貯蔵タンクに戻す
ように構成してもよい。In the above embodiment, an air diffusion tube 11 is provided in the cartridge filter tank 6 and the carbon tank 7, that is, the button trap 3 of the dry cleaning machine 1 incorporating the filter and the adsorbent.
Although the example in which the ozone gas is sent from the above is described, the dry cleaning machine 1 is not limited to this, and the solvent storage tank, the filter, and the adsorbent may be provided outside. For example, the solvent discharged from the washing tub 8 is guided to the outside of the dry cleaning machine 1, and ozone gas in the form of fine bubbles is injected into the solvent, and contaminants in the solvent are oxidized, decomposed, aggregated by the action of the ozone gas, and dried. A configuration may be adopted in which the solvent is collected and adsorbed and removed by a filter and an adsorbent provided outside the cleaning machine 1, and the cleaned solvent is returned to a solvent storage tank provided outside.
【００３０】汚染物質を含んだ溶剤にオゾンガスを注入
し、オゾンの酸化・分解・凝集作用によりフィルタ及び
吸着剤での汚染物質の捕集・吸着効率が向上するためフ
ィルタ及びフィルタ吸着剤の負担はオゾンガス注入前に
比べて大きくなる。このため、溶剤の清浄度を保つ効果
を維持するためにはその管理として当然フィルタ及び吸
着剤の交換頻度を多くする必要がある。即ち、捕集・吸
着され濃縮、高濃度化された汚染物質を系内に長くとど
めておくと、該汚染物質の変成や溶剤への再溶解を招
き、不都合を生じることになる。The ozone gas is injected into the solvent containing the pollutant, and the efficiency of collecting and adsorbing the pollutant on the filter and the adsorbent is improved by the oxidizing, decomposing and coagulating actions of ozone. It becomes larger than before ozone gas injection. For this reason, in order to maintain the effect of maintaining the cleanliness of the solvent, it is necessary to increase the frequency of replacement of the filter and the adsorbent as a matter of course. That is, if the contaminants that have been collected, adsorbed, concentrated, and concentrated are kept in the system for a long time, the contaminants are denatured or redissolved in a solvent, resulting in inconvenience.
【００３１】このため、上記実施例に蒸留機を併設して
使用することはフィルタ及び吸着剤の負担を軽減するこ
とになり、その交換周期を長くできるとともに、系外へ
早く汚染物質を除去することになるので、汚染物質の蓄
積による変成や溶剤への再溶解をなくすかまた極力少な
くでき、オゾン注入との相乗効果を充分に得られる。当
然ながら蒸留機の使用頻度はオゾン注入前と比べて極め
て少なくできる。Therefore, the use of a distilling machine in addition to the above-described embodiment reduces the load on the filter and the adsorbent, so that the replacement cycle can be lengthened and contaminants can be quickly removed from the system. Therefore, denaturation due to accumulation of contaminants and re-dissolution in a solvent can be eliminated or minimized, and a synergistic effect with ozone injection can be sufficiently obtained. Naturally, the frequency of use of the distillation machine can be extremely reduced as compared with before the ozone injection.
【００３２】更に、オゾンによって酸化・分解された汚
染物質は様々な形態の物質となるため、吸着剤での吸着
効果をより向上させるために最適な吸着剤を用いること
も有効である。このため、吸着剤には活性炭、活性アル
ミナ、活性白土の他、これらのそれぞれとゼライト又は
シリカゲル又はイオン交換樹脂の組み合わせか、さらに
はこれらを吸着する物質に応じて組み合わせてなるもの
を使用することにより、その溶剤の再生効率を更に向上
させることができる。Further, since the contaminants oxidized and decomposed by ozone become various types of substances, it is also effective to use an optimal adsorbent to further improve the adsorption effect of the adsorbent. For this reason, besides activated carbon, activated alumina and activated clay, use a combination of each of these with jellyite, silica gel, or an ion exchange resin, or a combination of these in accordance with the substance that adsorbs them. Thereby, the regeneration efficiency of the solvent can be further improved.
【００３３】[0033]
【発明の効果】以上説明したように、各請求項に記載の
発明によれば下記のような優れた効果が得られる。請求
項１に記載の発明によれば、汚染物質を含む石油系の溶
剤にオゾンガスを注入するので、オゾンガスの作用によ
って、溶剤中の汚染物質が酸化・分解・凝集し、フィル
タ及び吸着剤で該汚染物質を除去することが容易にな
る。また、オゾンガスは濃度７０体積％以上の酸素ガス
を原料として放電により発生させたオゾンガスを注入す
ることにより、オゾン化空気のように窒素酸化物（ＮＯ
ｘ）が多く存在しないから、例えば吸着剤に活性炭を用
いても窒素酸化物が活性炭に作用して爆発するという問
題はなくなる。また、従来の石油系溶剤を用いるドライ
クリーニング装置に簡単な改良を加えることにより、石
油系溶剤を清浄な状態に保つことができる。As described above, according to the invention described in the claims , the following excellent effects can be obtained. Claim
According to the invention described in claim 1, and injects ozone into petroleum-based solvent <br/> agent containing pollutants, by the action of ozone, pollutants are oxidized and decomposed and aggregated in a solvent, the filter and it is easy to remove the soil dyeing quality adsorbent. Ozone gas is an oxygen gas having a concentration of 70% by volume or more.
Ozone gas generated by electric discharge
As a result, nitrogen oxides (NO
x) does not exist in a large amount, so for example, using activated carbon as an adsorbent
Question that nitrogen oxides act on activated carbon and explode
The title is gone. Further, the petroleum-based solvent can be kept in a clean state by adding a simple improvement to a conventional dry cleaning apparatus using a petroleum-based solvent.
【００３４】請求項２に記載の発明によれば、更にオゾ
ンガスを散気管の微細孔を通して石油系溶剤に注入する
ので、オゾンガスと溶剤の接触面積が大きくなり、オゾ
ンと汚染物質との作用効率が高くなり、汚染物質が効率
良く酸化・分解・凝集する。 According to the second aspect of the present invention , the ozone gas is further injected into the petroleum-based solvent through the fine holes of the air diffuser, so that the contact area between the ozone gas and the solvent is increased, and the ozone gas and the pollutants are removed. action efficiency and increases, pollutants are efficiently oxidized and decomposed and aggregated.
【００３５】請求項３に記載の発明によれば、更にオゾ
ンガスの注入は洗濯槽の後で且つフィルタの前の溶剤循
環経路に設けることにより、最も汚染度の高い溶剤にオ
ゾンが作用し、該作用を受け酸化・分解・凝集した汚染
物質は速やかにフィルタや吸着剤で除去されるから、効
率よく溶剤の浄化ができる。[0035] According to the invention described in claim 3, further by and Rukoto provided in a solvent circulation path of the previous filter after the ozone <br/> injection Ngasu washing tub, the most highly contaminated solvent ozone acts contaminated <br/> substance oxidized, decomposed and aggregated received the action from being rapidly removed by the filter and adsorbent can efficiently purify the solvent.
【００３６】[0036]
【図１】本発明の溶剤再生方法を採用する石油系の溶剤
を用いるドライクリーニング装置の構成を示す図であ
る。FIG. 1 is a diagram showing a configuration of a dry cleaning apparatus using a petroleum-based solvent that employs the solvent regeneration method of the present invention.
【図２】オゾンガスを溶剤中に注入する散気管の構造例
を示す図である。FIG. 2 is a diagram showing an example of the structure of an air diffuser for injecting ozone gas into a solvent.
【図３】オゾンガスを溶剤中に注入する散気管の構造例
を示す図である。FIG. 3 is a diagram showing an example of the structure of an air diffuser for injecting ozone gas into a solvent.
【図４】オゾン発生装置の構成例を示す図である。FIG. 4 is a diagram illustrating a configuration example of an ozone generator.
【符号の説明】 １ ドライクリーニング機 ２ 溶剤貯蔵タンク ３ ボタントラップ ４ プレフィルタ ５ 循環ポンプ ６ カートリッジフィルタタンク ７ カーボンタンク ８ 洗濯槽 ９ 熱交換器 １０ オゾン発生装置 １１ 散気管[Description of Signs] 1 Dry cleaning machine 2 Solvent storage tank 3 Button trap 4 Prefilter 5 Circulation pump 6 Cartridge filter tank 7 Carbon tank 8 Washing tub 9 Heat exchanger 10 Ozone generator 11 Air diffuser
───────────────────────────────────────────────────── フロントページの続き (72)発明者 新荘 良一 神奈川県藤沢市本藤沢４丁目２番１号 株式会社荏原総合研究所内 (72)発明者 石井 義弘 東京都大田区羽田旭町11番１号 株式会 社荏原製作所内 (72)発明者 高坂 孝一 東京都大田区下丸子２−11−１ 株式会 社白洋舎内 (56)参考文献 特開 平６−154478（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) D06F 43/08 ──────────────────────────────────────────────────続 き Continued on the front page (72) Ryoichi Shinso 4-2-1, Motofujisawa, Fujisawa-shi, Kanagawa Inside Ebara Research Institute, Inc. (72) Inventor Yoshihiro Ishii 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Inside Ebara Corporation (72) Inventor Koichi Takasaka 2-1-1-1, Shimomaruko, Ota-ku, Tokyo Inside Hakuyosha Co., Ltd. (56) References JP-A-6-154478 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) D06F 43/08
Claims (5)
具備し、溶剤貯蔵タンク内の石油系溶剤を前記循環ポン
プで洗濯槽に供給し、該洗濯槽から貯蔵タンクに戻すよ
うに構成されたドライクリーニング装置の溶剤再生方法
であって、 洗浄により被洗浄物より溶出した汚染物質を含む前記石
油系の溶剤に濃度７０体積％以上の酸素ガスを原料とし
て放電により発生させたオゾンガスを注入し、該汚染物
質を酸化・分解・凝集させた後、該溶剤をフィルタ及び
吸着剤を通して該汚染物質を除去して該溶剤を浄化再生
することを特徴とするドライクリーニング装置の溶剤再
生方法。1. A washing tub, a solvent storage tank, and a circulation pump, wherein a petroleum-based solvent in the solvent storage tank is supplied to the washing tub by the circulation pump, and is returned from the washing tub to the storage tank. A method for regenerating a solvent in a dry cleaning apparatus, wherein the petroleum-based solvent containing contaminants eluted from an object to be cleaned by cleaning is supplied with oxygen gas having a concentration of 70% by volume or more as a raw material
Ozone gas generated by a discharge Te is injected, after oxidizing, decomposing and aggregating the contaminants, and wherein the purifying play the solvent was removed soil dyeing quality of the solvent through a filter and a sorbent Solvent regeneration method for a dry cleaning device.
に注入することを特徴とする請求項１に記載のドライク
リーニング装置の溶剤再生方法。2. The method of claim 1, wherein the ozone gas is formed into fine bubbles and injected into a solvent.
つ前記フィルタの通過前の溶剤中に注入することを特徴
とする請求項１又は２に記載のドライクリーニング装置
の溶剤再生方法。3. A solvent regeneration method of dry cleaning apparatus according to claim 1 or 2, wherein the ozone gas is characterized by injecting into the solvent prior to passage of and the filter after the washing tub through.
ーニング装置の運転と連動させ、該ドライクリーニング
装置の運転時のみオゾンガスを注入することを特徴とす
る請求項１又は２又は３に記載のドライクリーニング装
置の溶剤再生方法。4. The dry cleaning apparatus according to claim 1, wherein the injection of the ozone gas is linked with the operation of the dry cleaning apparatus, and the ozone gas is injected only during the operation of the dry cleaning apparatus. Solvent regeneration method.
ナ、又は活性白土、又は活性炭、活性アルミナ及び活性
白土のそれぞれとゼオライト又はシリカゲル又はイオン
交換樹脂との組合せか、又はこれらを吸着する物質に応
じて組合せたものであることを特徴とする請求項１乃至
４記載のいずれか１つに記載のドライクリーニング装置
の溶剤再生方法。Wherein said adsorbent is activated carbon, or activated alumina, or activated clay, or activated carbon, or a combination of the respective active alumina and activated clay and zeolite, or silica gel or ion exchange resins, or according to these substance which adsorbs solvent regeneration method of dry cleaning apparatus according to any one of claims 1 to 4, wherein the is a combination Te.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/293,338 US5488842A (en) | 1994-02-25 | 1994-08-24 | Method for deodorizing and refreshing for dry cleaning and dry cleaning apparatus using such method |
| EP94113235A EP0698680B1 (en) | 1994-02-25 | 1994-08-24 | Method for deodorizing and refreshing for dry cleaning and dry cleaning apparatus using such method |
| US08/488,415 US5511264A (en) | 1994-02-25 | 1995-06-07 | Method for deodorizing and refreshing for dry cleaning |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6085493 | 1993-02-25 | ||
| JP5-60854 | 1993-02-25 | ||
| US08/293,338 US5488842A (en) | 1994-02-25 | 1994-08-24 | Method for deodorizing and refreshing for dry cleaning and dry cleaning apparatus using such method |
| EP94113235A EP0698680B1 (en) | 1994-02-25 | 1994-08-24 | Method for deodorizing and refreshing for dry cleaning and dry cleaning apparatus using such method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06304390A JPH06304390A (en) | 1994-11-01 |
| JP3096753B2 true JP3096753B2 (en) | 2000-10-10 |
Family
ID=27235862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06053124A Expired - Fee Related JP3096753B2 (en) | 1993-02-25 | 1994-02-25 | Solvent regeneration method for dry cleaning equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3096753B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0994384A (en) * | 1995-09-29 | 1997-04-08 | Fukumatsu Noguchi | Dry cleaning device |
| EP2436664A4 (en) * | 2009-05-12 | 2012-10-31 | Wako Pure Chem Ind Ltd | Method for purifying organic solvent |
-
1994
- 1994-02-25 JP JP06053124A patent/JP3096753B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06304390A (en) | 1994-11-01 |
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