JP2002136803A - Method and apparatus for separating/recovering waste liquid - Google Patents

Method and apparatus for separating/recovering waste liquid

Info

Publication number
JP2002136803A
JP2002136803A JP2000334954A JP2000334954A JP2002136803A JP 2002136803 A JP2002136803 A JP 2002136803A JP 2000334954 A JP2000334954 A JP 2000334954A JP 2000334954 A JP2000334954 A JP 2000334954A JP 2002136803 A JP2002136803 A JP 2002136803A
Authority
JP
Japan
Prior art keywords
waste liquid
oil
water
separating
sludge
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
Application number
JP2000334954A
Other languages
Japanese (ja)
Other versions
JP3944352B2 (en
Inventor
Masataka Ishihara
正孝 石原
Mitsuma Matsuda
光馬 松田
Shoichi Kashino
彰一 樫野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koyo Seiko Co Ltd
Original Assignee
Koyo Seiko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koyo Seiko Co Ltd filed Critical Koyo Seiko Co Ltd
Priority to JP2000334954A priority Critical patent/JP3944352B2/en
Publication of JP2002136803A publication Critical patent/JP2002136803A/en
Application granted granted Critical
Publication of JP3944352B2 publication Critical patent/JP3944352B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Landscapes

  • Auxiliary Devices For Machine Tools (AREA)
  • Physical Water Treatments (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device for separating/recovering a waste liquid, in which the cost for treating the waste liquid can be reduced and oil or water contained in the waste liquid can be reused as resources. SOLUTION: In the method of separating/recovering the waste liquid, first the waste liquid is subjected to a centrifugal separation process S1, so that sludge is removed from the waste liquid and a mixed liquid of oil and water is obtained and then the mixed liquid is subjected to an oil-water separation process S2 to separate it into oil and water and to recover the oil and water.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、スラッジと水分
と水溶性の油分とを含んだ廃液、特に水溶性の金属加工
油等の廃液を水分、油分、及びスラッジに分離して再利
用するための廃液の分離回収方法及びその分離回収装置
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste liquid containing sludge, water and a water-soluble oil, particularly a water-soluble metal working oil or the like, which is separated into water, oil and sludge for reuse. The present invention relates to a method for separating and collecting waste liquid and a device for separating and collecting the same.

【0002】[0002]

【従来の技術及び発明が解決しようとする課題】従来よ
り工場や事業所等では、切削油や研削油などの金属加工
油が切削加工、研削加工、及びプレス加工等の金属加工
処理に用いられている。このような金属加工油には、例
えば鉱油に希釈用の水を加えて乳化剤(界面活性剤)を
混合した水溶性のものが知られており、その成分は使用
する工具と金属加工物との間の潤滑性の向上やそれらの
冷却、あるいは金属加工物の洗浄やその仕上面の保護等
の様々な用途に応じて調整されている。ところで、上記
のような金属加工油は、金属加工処理中に加熱されて油
分や水分の含有量等の成分が変化したり、前記の加熱等
に起因する化学反応物や金属加工処理の切粉あるいは切
りくずなどが沈殿してスラッジを発生したりするので、
金属加工処理後の金属加工油は廃液として処分する必要
がある。
2. Description of the Related Art Conventionally, in factories and offices, metal working oils such as cutting oil and grinding oil have been used for metal working such as cutting, grinding and pressing. ing. As such a metal working oil, for example, a water-soluble oil obtained by adding water for dilution to a mineral oil and mixing an emulsifier (surfactant) is known. It is adjusted according to various uses such as improvement of lubricity between them, cooling of them, or cleaning of a metal workpiece and protection of its finished surface. By the way, the metal working oil as described above is heated during the metal working, and the components such as the oil content and the moisture content change. Alternatively, chips and the like settle out and generate sludge,
The metalworking oil after metalworking treatment needs to be disposed of as waste liquid.

【0003】ところが、前記のようなスラッジは、環境
汚染を防止するために、廃棄物処理法等により処分の方
法が規定されているものであり、専用の処理設備を持た
ない工場や事業所等では産業廃棄物処理業者に処分を委
託することが義務付けられている。また、このスラッジ
の委託処分では、スラッジだけでなく、油分及び水分を
含んだ廃液そのままの状態で産業廃棄物として産業廃棄
物処理業者に引渡ししていた。このため、産業廃棄物処
理業者に引渡す産業廃棄物の量が多くなって、その輸送
コストを含む廃液の廃棄コストを抑えることが難しいも
のであり、さらには資源の有効利用の観点からも好まし
いものでなかった。
However, in order to prevent environmental pollution, the disposal method of the above-mentioned sludge is regulated by a waste treatment method or the like. Requires that industrial waste disposal contractors outsource disposal. Also, in this consigned disposal of sludge, not only sludge but also a waste liquid containing oil and water is delivered as it is to industrial waste treatment companies as industrial waste. For this reason, the amount of industrial waste to be transferred to industrial waste disposal companies increases, making it difficult to reduce the disposal cost of waste liquid, including its transportation cost, and is also preferable from the viewpoint of effective use of resources. Was not.

【0004】上記のような従来の問題点に鑑み、本発明
は、廃液の廃棄コストを削減することができるととも
に、上記廃液中の油分や水分を再資源化することができ
る廃液の分離回収方法及びその分離回収装置を提供する
ことを目的とする。
[0004] In view of the above-mentioned conventional problems, the present invention can reduce the cost of disposing of a waste liquid and can recycle the waste liquid by recycling oil and water in the waste liquid. And an apparatus for separating and collecting the same.

【0005】[0005]

【課題を解決するための手段】本発明の廃液の分離回収
方法は、スラッジと水分と水溶性の油分とを含んだ廃液
の分離回収方法であって、遠心分離によって前記廃液か
らスラッジを除去して当該廃液を油分と水分との混合液
とする遠心分離工程、及び前記混合液を油分と水分とに
分離する油水分離工程を具備することを特徴としている
(請求項1)。
SUMMARY OF THE INVENTION The present invention provides a method for separating and recovering waste liquid, which is a method for separating and recovering waste liquid containing sludge, water and a water-soluble oil, wherein the sludge is removed from the waste liquid by centrifugation. And a centrifugal separation step of converting the waste liquid into a mixture of oil and moisture, and an oil-water separation step of separating the mixture into oil and moisture.

【0006】上記のように構成された廃液の分離回収方
法では、まず遠心分離を行うことによって廃液中のスラ
ッジ(産業廃棄物)を除去しているので、例えば除去し
たスラッジだけを外部の産業廃棄物業者に引渡す場合に
は、その産業廃棄物業者に委託する産業廃棄物の量を大
幅に低減することができ、よって当該廃液の廃棄コスト
も削減することができる。また、上記混合液を油分と水
分とに分離する工程を実施しているので、この分離した
油分を燃料油等として容易に再資源化することができる
とともに、分離した水分を例えば工業用水として有効に
再利用することができる。
In the method for separating and recovering waste liquid configured as described above, first, sludge (industrial waste) in the waste liquid is removed by centrifugation. Therefore, for example, only the removed sludge is removed from external industrial waste. When handing over to a goods dealer, the amount of industrial waste to be entrusted to the industrial waste trader can be significantly reduced, and therefore, the disposal cost of the waste liquid can also be reduced. Further, since the step of separating the mixed liquid into oil and water is performed, the separated oil can be easily recycled as fuel oil or the like, and the separated water can be effectively used as, for example, industrial water. Can be reused.

【0007】また、上記廃液の分離回収方法(請求項
1)において、前記遠心分離工程の前に、含有する油分
が変質しない温度範囲に前記廃液を加熱する工程を実施
してもよい(請求項2)。この場合、廃液に含有された
油分を変質させることなく、その廃液の粘性を低下させ
ることができるので、遠心分離によりスラッジを効率よ
く除去することができ、前記の遠心分離工程の工数を削
減することができる。
In the method for separating and recovering waste liquid (claim 1), a step of heating the waste liquid to a temperature range in which oil contained therein does not deteriorate before the centrifugation step may be performed. 2). In this case, since the viscosity of the waste liquid can be reduced without deteriorating the oil contained in the waste liquid, sludge can be efficiently removed by centrifugation, and the number of steps in the centrifugation step is reduced. be able to.

【0008】また、この発明の廃液の分離回収装置は、
スラッジと水分と水溶性の油分とを含んだ廃液の分離回
収装置であって、遠心分離によって前記廃液からスラッ
ジを除去して当該廃液を油分と水分との混合液とするた
めの遠心分離機と、前記混合液を油分と水分とに分離す
るための油水分離装置と、前記遠心分離機と前記油水分
離装置とを搭載して移動させる移動手段とを備えること
を特徴としている(請求項3)。
[0008] The waste liquid separating and recovering apparatus of the present invention comprises:
A device for separating and recovering waste liquid containing sludge, water and a water-soluble oil component, comprising a centrifugal separator for removing sludge from the waste liquid by centrifugation to make the waste liquid a mixed liquid of oil and water. And an oil / water separator for separating the mixed liquid into oil and water, and a moving means for mounting and moving the centrifugal separator and the oil / water separator. .

【0009】上記のように構成された廃液の分離回収装
置では、前記の遠心分離機が廃液から産業廃棄物のスラ
ッジを除去するので、例えば外部の産業廃棄物業者に処
分を委託する場合に産業廃棄物の量を大幅に低減するこ
とができ、よって当該廃液の廃棄コストも削減すること
ができる。また、油水分離装置が上記混合液を油分と水
分とに分離するので、分離した油分及び水分を有効に再
利用することができる。また、移動手段が上記遠心分離
機及び油水分離装置を搭載しているので、例えば複数箇
所に貯えられた廃液に対して、前述のスラッジ、油分、
及び水分に分離する処理を効率よく行うことができると
ともに、コストパフォーマンスに優れた分離回収装置を
構成することができる。
In the waste liquid separating and recovering apparatus configured as described above, the centrifugal separator removes sludge of industrial waste from the waste liquid. The amount of waste can be greatly reduced, and the cost of disposing of the waste liquid can be reduced. Further, since the oil-water separator separates the mixed liquid into oil and water, the separated oil and water can be effectively reused. Further, since the moving means is equipped with the centrifugal separator and the oil-water separator, for example, the above-mentioned sludge, oil,
In addition, it is possible to efficiently perform the process of separating into water and water, and to configure a separation and recovery device excellent in cost performance.

【0010】また、上記廃液の分離回収装置(請求項
3)において、前記遠心分離機または前記油水分離装置
との間で前記廃液または前記混合液をそれぞれ循環させ
るための一時貯留タンクを前記移動手段に搭載してもよ
い(請求項4)。この場合、一時貯留タンクと遠心分離
機または油水分離装置との間で前記の廃液または混合液
をそれぞれ循環させることにより、その廃液または混合
液に対して遠心分離または油水分離をそれぞれ繰り返し
行うことができる。
[0010] In the waste liquid separating and collecting apparatus (claim 3), the temporary storage tank for circulating the waste liquid or the mixed liquid with the centrifugal separator or the oil / water separating apparatus, respectively, is provided by the moving means. (Claim 4). In this case, by circulating the waste liquid or the mixed liquid between the temporary storage tank and the centrifugal separator or the oil-water separator, respectively, it is possible to repeatedly perform centrifugation or oil-water separation on the waste liquid or the mixed liquid, respectively. it can.

【0011】[0011]

【発明の実施の形態】以下、本発明の廃液の分離回収方
法及びその分離回収装置を示す好ましい実施形態につい
て、図面を参照しながら説明する。図1は、本発明の一
実施形態に係る廃液の分離回収方法を示す工程図であ
る。図1において、本実施形態の分離回収方法では、ま
ず廃液に対して遠心分離工程S1を行い、その廃液をス
ラッジ及び水分と油分との混合液に分離する。これによ
り、産業廃棄物であるスラッジだけが廃液から取り除か
れて回収される。尚、この遠心分離工程S1は廃液から
固形物のスラッジを除去できるものであればよく、同図
に示すように、廃液をスラッジ、水分、及び水分と油分
との混合液に分離してもよい。また、この廃液は、例え
ばエマルジョン形やソリューブ形の水溶性の金属加工油
の廃液であり、金属加工処理で使用された後、廃液タン
ク5(図2参照)に逐次貯められたものである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a process chart showing a waste liquid separation and recovery method according to one embodiment of the present invention. In FIG. 1, in the separation and recovery method of the present embodiment, first, a centrifugal separation step S1 is performed on the waste liquid, and the waste liquid is separated into sludge and a liquid mixture of water and oil. Thereby, only sludge, which is industrial waste, is removed from the waste liquid and collected. The centrifugation step S1 only needs to be capable of removing solid sludge from the waste liquid, and as shown in the figure, the waste liquid may be separated into sludge, moisture, and a mixture of moisture and oil. . The waste liquid is, for example, a waste liquid of a water-soluble metal working oil of an emulsion type or a solution type, and is sequentially stored in a waste liquid tank 5 (see FIG. 2) after being used in metal processing.

【0012】続いて、前記の混合液に対して油水分離工
程S2を実施して、その混合液を油分と水分に分離す
る。これにより、廃液に含まれた水分と油分とが互いに
分けられて回収される。尚、上記の説明以外に、例えば
廃液を加熱(沸騰)することによって廃液に含まれてい
る水分を蒸発させて、当該廃液を濃縮する工程を前記の
遠心分離工程S1の前に実施してもよい。
Subsequently, an oil / water separation step S2 is performed on the mixed liquid to separate the mixed liquid into oil and water. Thereby, the water and the oil contained in the waste liquid are separated and collected. In addition to the above description, the step of evaporating water contained in the waste liquid by heating (boiling) the waste liquid and concentrating the waste liquid may be performed before the centrifugation step S1. Good.

【0013】図2は、本発明の一実施形態に係る廃液の
分離回収装置の要部構成例を示す説明図である。図2に
示すように、本実施形態の分離回収装置は、遠心分離に
よって廃液からスラッジを除去して当該廃液を油分と水
分との混合液とするための遠心分離機1と、上記混合液
を油分と水分とに分離するための油水分離装置3と、上
記遠心分離機1と油水分離装置3とを搭載して移動させ
る移動手段としての運搬台車4とを備えている。また、
運搬台車4には、遠心分離機1または油水分離装置3と
の間で前記廃液または前記混合液をそれぞれ循環させる
ための一時貯留タンク2が搭載されている。
FIG. 2 is an explanatory view showing an example of a configuration of a main part of a waste liquid separating and collecting apparatus according to an embodiment of the present invention. As shown in FIG. 2, the separation and recovery apparatus of the present embodiment includes a centrifugal separator 1 for removing sludge from waste liquid by centrifugation to make the waste liquid a mixed liquid of oil and moisture; The apparatus includes an oil / water separator 3 for separating oil and water, and a transport trolley 4 as a moving means on which the centrifuge 1 and the oil / water separator 3 are mounted and moved. Also,
A temporary storage tank 2 for circulating the waste liquid or the mixed liquid with the centrifuge 1 or the oil-water separator 3 is mounted on the transport vehicle 4.

【0014】図1及び図2において、上記遠心分離工程
S1では、廃液タンク5から廃液を既知の遠心分離機1
に供給する。さらに、遠心分離機1と一時貯留タンク2
との間で廃液を循環させて、スラッジが廃液から除去さ
れるまで遠心分離工程S1を継続する。尚、遠心分離機
1によって分離されたスラッジは、図示しないスラッジ
トレイ等の保管手段に送られて回収される。また、この
遠心分離工程S1の終了後の混合液には、10重量%程
度の水分が含まれている。前記の遠心分離機1は、例え
ばデカンター式のものであり、比重差に応じて、廃液を
スラッジ及び水分と油分との混合液に分離して別個に排
出可能に構成されている。
In FIG. 1 and FIG. 2, in the centrifugation step S 1, the waste liquid is discharged from a waste liquid tank 5 to a known centrifugal separator 1.
To supply. Furthermore, a centrifuge 1 and a temporary storage tank 2
The centrifugation step S1 is continued until the sludge is removed from the waste liquid. The sludge separated by the centrifugal separator 1 is sent to storage means such as a sludge tray (not shown) and collected. Further, the mixed liquid after the completion of the centrifugation step S1 contains about 10% by weight of water. The centrifugal separator 1 is, for example, a decanter type, and is configured to be capable of separating waste liquid into sludge and a liquid mixture of water and oil according to the difference in specific gravity and separately discharging the liquid.

【0015】前記の油水分離工程S2では、一時貯留タ
ンク2から既知の油水分離装置3に上記混合液を供給す
る。さらに、一時貯留タンク2と油水分離装置3との間
で混合液を循環させて、油分の含水量が所定値(例え
ば、1重量%)以下となるまで油水分離工程S2を継続
する。上記油水分離装置3は、例えば粗粒浮上方式のも
のであり、上記混合液に含まれた油分を粗粒化し沈殿さ
せることにより、その混合液に含まれた油分と水分とを
分離する。油水分離装置3は、分離した油分を貯蔵タン
ク6に送出する。また、上記遠心分離工程S1及び油水
分離工程S2で分離された水分は、例えば工場内の既設
の排水処理設備に送られて、所定の浄化処理等が施され
る。
In the oil / water separation step S2, the mixed liquid is supplied from the temporary storage tank 2 to a known oil / water separation device 3. Further, the mixed liquid is circulated between the temporary storage tank 2 and the oil / water separator 3, and the oil / water separation step S2 is continued until the water content of the oil falls below a predetermined value (for example, 1% by weight). The oil-water separator 3 is, for example, of a coarse-grain floating type. The oil-water separator 3 coarsely precipitates and precipitates the oil contained in the mixed liquid, thereby separating the oil contained in the mixed liquid from moisture. The oil / water separator 3 sends the separated oil to the storage tank 6. The water separated in the centrifugation step S1 and the oil / water separation step S2 is sent to, for example, an existing wastewater treatment facility in a factory, where a predetermined purification treatment or the like is performed.

【0016】上記のように構成された本実施形態の廃液
の分離回収方法及びその分離回収装置では、まず遠心分
離機1を用いて廃液に遠心分離を行うことにより、産業
廃棄物のスラッジを廃液から除去している。それゆえ、
例えば除去したスラッジだけを外部の産業廃棄物業者に
引渡す場合には、廃液ごと引渡していた前記の従来例に
比べて、その産業廃棄物業者に委託する産業廃棄物の量
を大幅に低減することができ、よって当該廃液の廃棄コ
ストも削減することができる。また、除去したスラッジ
から金属加工処理での切粉等を回収し製鋼原料等に再利
用することも可能である。さらに、油水分離装置3を用
いて上記混合液を油分と水分とに分離する工程を実施し
ているので、分離した油分を燃料油等として容易に再資
源化することができるとともに、例えば工業用水として
分離した水分を有効に再利用することができる。
In the method and apparatus for separating and recovering waste liquid according to the present embodiment configured as described above, first, centrifugal separation is performed on the waste liquid by using the centrifugal separator 1 so that the sludge of industrial waste is discharged. Has been removed from. therefore,
For example, when transferring only the removed sludge to an external industrial waste contractor, the amount of industrial waste entrusted to the industrial waste contractor is significantly reduced as compared with the conventional example in which the entire waste liquid is transferred. Therefore, the disposal cost of the waste liquid can be reduced. It is also possible to collect chips and the like in the metal processing from the removed sludge and reuse them as steelmaking raw materials. Further, since the step of separating the mixed liquid into oil and moisture using the oil-water separator 3 is performed, the separated oil can be easily recycled as fuel oil or the like, and, for example, industrial water can be used. The water separated can be effectively reused.

【0017】また、本実施形態の分離回収装置では、上
記遠心分離機1、一時貯留タンク2、及び油水分離装置
3を運搬台車(移動手段)4に搭載しているので、例え
ば複数の各工場や一つの工場内の複数箇所に分散して配
置された複数の廃液タンク5の近傍に運搬台車4を移動
することができる。これにより、複数の各廃液タンク5
に貯められた廃液に対して、前述のスラッジ、油分、及
び水分に分離する処理を効率よく行うことができるとと
もに、複数箇所で共用することが可能なコストパフォー
マンスに優れた分離回収装置を構成することができ、工
場の設備投資費を抑えることができる。
In the separation and recovery apparatus of the present embodiment, the centrifuge 1, the temporary storage tank 2, and the oil / water separation apparatus 3 are mounted on the transport trolley (moving means) 4, so that, for example, a plurality of factories In addition, the transport trolley 4 can be moved to the vicinity of a plurality of waste liquid tanks 5 dispersedly arranged at a plurality of locations in one factory. Thereby, each of the plurality of waste liquid tanks 5
The waste liquid stored in the wastewater can be efficiently separated into sludge, oil, and water as described above, and a cost-effective separation / recovery device that can be shared at multiple locations is configured. Can reduce plant and equipment investment costs.

【0018】また、本実施形態の分離回収装置では、一
時貯留タンク2と遠心分離機1または油水分離装置3と
の間で前記の廃液または混合液をそれぞれ循環させるこ
とにより、その廃液または混合液に対して遠心分離また
は油水分離をそれぞれ繰り返し行うことができ、上記廃
液からスラッジを完全に除去することができるととも
に、上記混合液から分離した油分の含水量を所望の値に
することができる。
In the separation / recovery apparatus of the present embodiment, the waste liquid or the mixed liquid is circulated between the temporary storage tank 2 and the centrifugal separator 1 or the oil-water separator 3 to circulate the waste liquid or the mixed liquid. , Centrifugal separation or oil-water separation can be repeatedly performed, sludge can be completely removed from the waste liquid, and the water content of the oil separated from the mixed liquid can be set to a desired value.

【0019】また、上述の説明以外に、廃液に対して、
まず含有する油分が変質しない温度範囲に加熱した後、
その廃液からスラッジを除去する工程を前記の遠心分離
工程S1の前に実施してもよい。具体的には、例えば図
3に示すように、まず廃液に対して、例えば80〜90
℃に加熱する加熱工程S3を行ってもよい。この加熱工
程S3では、例えば金属チューブに銅線を内蔵したヒー
ター部材が前記の廃液タンク5(図2)内に設けられ
て、上述の温度範囲内に廃液を加熱する。さらに、メッ
シュフィルタ等のフィルタ部材(図示せず)が上記廃液
タンク5と遠心分離機1(図2)との間に配置されて、
加熱された廃液はフィルタ部材を通して廃液タンク5か
ら遠心分離機1に供給される。
In addition to the above description, for waste liquid,
First, after heating to a temperature range where the contained oil does not change,
The step of removing sludge from the waste liquid may be performed before the centrifugation step S1. Specifically, for example, as shown in FIG.
A heating step S3 of heating to ° C. may be performed. In the heating step S3, for example, a heater member having a copper tube incorporated in a metal tube is provided in the waste liquid tank 5 (FIG. 2) to heat the waste liquid within the above-mentioned temperature range. Further, a filter member (not shown) such as a mesh filter is disposed between the waste liquid tank 5 and the centrifuge 1 (FIG. 2).
The heated waste liquid is supplied from the waste liquid tank 5 to the centrifuge 1 through the filter member.

【0020】前記の加熱工程S3を実施することによ
り、廃液に含まれた油分を変質させることなく、その廃
液の粘性を低下させることができ、上記遠心分離機1や
フィルタ部材でスラッジを効率よく除去することができ
る。また、発明者等の実験によれば、上記の加熱工程S
3を実施した場合、上記加熱工程S3を行わなかった場
合に比べて、後続の遠心分離工程S1の工数を削減でき
ることが確認された。具体的には、遠心分離機1の稼働
時間をほぼ半分の時間に短縮して、廃液からスラッジを
除去できることが確認された。
By performing the heating step S3, the viscosity of the waste liquid can be reduced without deteriorating the oil contained in the waste liquid, and the sludge can be efficiently removed by the centrifugal separator 1 and the filter member. Can be removed. Further, according to the experiments performed by the inventors, the heating step S
It was confirmed that the number of steps in the subsequent centrifugation step S1 can be reduced when Step 3 was performed, compared to when the heating step S3 was not performed. Specifically, it was confirmed that the operation time of the centrifugal separator 1 was reduced to approximately half the time, and sludge could be removed from the waste liquid.

【0021】尚、上述の説明では、金属加工油の廃液を
水分、油分、及びスラッジに分離し回収する分離回収方
法及びその分離回収装置について説明したが、本発明は
不要な固形物であるスラッジと水分と水溶性の油分とを
含んだ廃液に対して好適に適用することができる。具体
的には、例えば塗装粕や床洗浄液の廃液に対して、それ
らの廃液に含まれたスラッジを除去し、かつ油分及び水
分に分離し回収することができる。より詳細にいえば、
前記の塗装粕を含んだ廃液は、例えば工場内の塗装ブー
スに塗着した塗装粕に高圧の洗浄水を吹き付けて洗い落
とした後の液体や塗装ブースの塗着防止を目的に流して
いる水等であり、再資源化できる水分及び塗料成分と、
ゴミやチリなどのスラッジとを含むものである。このよ
うな廃液に対して、前述の遠心分離工程S1あるいは続
いて油水分離工程S2を順次行うことにより、上記スラ
ッジを除去し、かつ水分と塗料成分とを別々に回収する
ことができる。
In the above description, the separation and recovery method and the separation and recovery apparatus for separating and recovering the waste liquid of the metalworking oil into water, oil and sludge have been described. The present invention can be suitably applied to a waste liquid containing water, water and a water-soluble oil component. Specifically, for example, sludge contained in the waste liquid of the coating lees and the floor cleaning liquid can be removed, and separated into oil and water and recovered. More specifically,
The waste liquid containing the coating lees is, for example, a liquid after the high-pressure washing water is sprayed onto the coating lees applied to the coating booth in the factory, and the water or the water flowing for the purpose of preventing the coating booth from being applied. Water and paint components that can be recycled,
Includes sludge such as garbage and dust. By sequentially performing the above-described centrifugation step S1 or the subsequent oil-water separation step S2 on such waste liquid, the sludge can be removed, and the water and the paint component can be separately recovered.

【0022】また、上記の説明では、遠心分離機1、一
時貯留タンク2、及び油水分離装置3を運搬台車4に搭
載した場合について説明したが、実施形態はこれに限定
されるものではなく、遠心分離機1及び油水分離装置3
が例えばトラック等の運搬台車4によって移動可能なも
のであればよい。
In the above description, the case where the centrifuge 1, the temporary storage tank 2, and the oil / water separator 3 are mounted on the transport trolley 4 has been described, but the embodiment is not limited to this. Centrifuge 1 and oil / water separator 3
Can be moved by a carrier 4 such as a truck, for example.

【0023】[0023]

【発明の効果】以上のように構成された本発明は次の効
果を奏する。請求項1の廃液の分離回収方法によれば、
まず遠心分離を行うことによって産業廃棄物のスラッジ
を廃液から除去しているので、例えば除去したスラッジ
だけを外部の産業廃棄物業者に引渡す場合には、その産
業廃棄物業者に委託する産業廃棄物の量を大幅に低減す
ることができ、よって当該廃液の廃棄コストも削減する
ことができる。また、上記混合液を油分と水分とに分離
する工程を実施しているので、この分離した油分を燃料
油等として容易に再資源化することができるとともに、
分離した水分を例えば工業用水として有効に再利用する
ことができる。
The present invention configured as described above has the following effects. According to the method for separating and recovering waste liquid of claim 1,
First, the industrial waste sludge is removed from the waste liquid by centrifugation, so if, for example, only the removed sludge is to be delivered to an external industrial waste contractor, the industrial waste contracted to that industrial waste contractor Can be greatly reduced, and the cost of disposing of the waste liquid can also be reduced. In addition, since the step of separating the mixed liquid into oil and water is performed, the separated oil can be easily recycled as fuel oil or the like,
The separated water can be effectively reused, for example, as industrial water.

【0024】請求項2の廃液の分離回収方法によれば、
廃液に含有された油分を変質させることなく、その廃液
の粘性を低下させることができるので、遠心分離により
スラッジを効率よく除去することができ、前記の遠心分
離工程の工数を削減することができる。
According to the method for separating and recovering waste liquid according to claim 2,
Since the viscosity of the waste liquid can be reduced without deteriorating the oil contained in the waste liquid, sludge can be efficiently removed by centrifugation, and the number of steps in the centrifugation step can be reduced. .

【0025】請求項3の廃液の分離回収装置によれば、
遠心分離機が廃液から産業廃棄物のスラッジを除去し、
油水分離装置がスラッジを除去した廃液を油分と水分と
に分離している。これにより、例えば外部の産業廃棄物
業者に処分を委託する場合に産業廃棄物の量を大幅に低
減することができ、よって当該廃液の廃棄コストも削減
することができる。また、分離した油分及び水分を容易
に再資源化して有効に再利用することができる。また、
移動手段が上記遠心分離機及び油水分離装置を搭載して
いるので、例えば複数箇所に分散して貯められた廃液に
対して、前述のスラッジ、油分、及び水分に分離する処
理を効率よく行うことができる。さらに、例えば複数の
工場で当該分離回収装置を共用することが可能となるの
で、工場の設備投資費を抑えることができる。
According to the waste liquid separating and collecting apparatus of claim 3,
Centrifuge removes industrial waste sludge from wastewater,
An oil / water separator separates the waste liquid from which sludge has been removed into oil and moisture. Thus, for example, when entrusting disposal to an external industrial waste contractor, the amount of industrial waste can be significantly reduced, and the disposal cost of the waste liquid can also be reduced. Further, the separated oil and water can be easily recycled and effectively reused. Also,
Since the moving means is equipped with the centrifugal separator and the oil-water separation device, for example, the waste liquid stored dispersedly at a plurality of locations can be efficiently subjected to the above-described treatment of separating sludge, oil, and moisture. Can be. Further, for example, the separation and collection device can be shared by a plurality of factories, so that capital investment costs of the factories can be reduced.

【0026】請求項4の廃液の分離回収装置によれば、
一時貯留タンクと遠心分離機または油水分離装置との間
で前記の廃液または混合液をそれぞれ循環させることに
より、その廃液または混合液に対して遠心分離または油
水分離をそれぞれ繰り返し行うことができる。その結
果、廃液からスラッジを完全に除去することができると
ともに、混合液から分離した油分の含水量を所望の値に
することができる。
According to the waste liquid separating and collecting apparatus of claim 4,
By circulating the waste liquid or the mixed liquid between the temporary storage tank and the centrifugal separator or the oil-water separator, centrifugation or oil-water separation can be repeatedly performed on the waste liquid or the mixed liquid. As a result, the sludge can be completely removed from the waste liquid, and the water content of the oil separated from the mixed liquid can be set to a desired value.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施形態に係る廃液の分離回収方法
を示す工程図である。
FIG. 1 is a process chart showing a method for separating and recovering waste liquid according to an embodiment of the present invention.

【図2】本発明の一実施形態に係る廃液の分離回収装置
の要部構成例を示す説明図である。
FIG. 2 is an explanatory diagram showing a configuration example of a main part of a waste liquid separation / recovery device according to an embodiment of the present invention.

【図3】本発明の他の実施形態に係る廃液の分離回収方
法を示す工程図である。
FIG. 3 is a process chart showing a waste liquid separation and recovery method according to another embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 遠心分離機 2 一時貯留タンク 3 油水分離装置 4 運搬台車(移動手段) S1 遠心分離工程 S2 油水分離工程 S3 加熱工程 DESCRIPTION OF SYMBOLS 1 Centrifuge 2 Temporary storage tank 3 Oil-water separation device 4 Carriage (transportation means) S1 Centrifugation process S2 Oil-water separation process S3 Heating process

───────────────────────────────────────────────────── フロントページの続き (72)発明者 樫野 彰一 大阪市中央区南船場三丁目5番8号 光洋 精工株式会社内 Fターム(参考) 3C011 EE08 4D037 AA13 AB06 BA01 CA06  ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shoichi Kashino 3-5-8 Minamisenba, Chuo-ku, Osaka-shi F-term in Koyo Seiko Co., Ltd. 3C011 EE08 4D037 AA13 AB06 BA01 CA06

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】スラッジと水分と水溶性の油分とを含んだ
廃液の分離回収方法であって、 遠心分離によって前記廃液からスラッジを除去して当該
廃液を油分と水分との混合液とする遠心分離工程、及び
前記混合液を油分と水分とに分離する油水分離工程を具
備することを特徴とする廃液の分離回収方法。
1. A method for separating and recovering a waste liquid containing sludge, water and a water-soluble oil component, wherein the sludge is removed from the waste liquid by centrifugation to make the waste liquid a mixed liquid of oil and water. A method for separating and recovering waste liquid, comprising: a separation step; and an oil-water separation step of separating the mixed liquid into oil and water.
【請求項2】前記遠心分離工程の前に、含有する油分が
変質しない温度範囲に前記廃液を加熱する工程を実施す
ることを特徴とする請求項1記載の廃液の分離回収方
法。
2. The method for separating and recovering waste liquid according to claim 1, wherein a step of heating the waste liquid to a temperature range in which oil contained therein is not deteriorated is performed before the centrifugation step.
【請求項3】スラッジと水分と水溶性の油分とを含んだ
廃液の分離回収装置であって、 遠心分離によって前記廃液からスラッジを除去して当該
廃液を油分と水分との混合液とするための遠心分離機
と、 前記混合液を油分と水分とに分離するための油水分離装
置と、 前記遠心分離機と前記油水分離装置とを搭載して移動さ
せる移動手段とを備えることを特徴とする廃液の分離回
収装置。
3. An apparatus for separating and recovering a waste liquid containing sludge, water and a water-soluble oil, wherein the sludge is removed from the waste liquid by centrifugation to make the waste liquid a mixed liquid of oil and water. A centrifugal separator, an oil / water separator for separating the mixed liquid into oil and moisture, and a moving means for mounting and moving the centrifuge and the oil / water separator. Waste liquid separation and recovery device.
【請求項4】前記遠心分離機または前記油水分離装置と
の間で前記廃液または前記混合液をそれぞれ循環させる
ための一時貯留タンクを前記移動手段に搭載したことを
特徴とする請求項3記載の廃液の分離回収装置。
4. The moving means according to claim 3, wherein a temporary storage tank for circulating the waste liquid or the mixed liquid with the centrifugal separator or the oil / water separator is mounted on the moving means. Waste liquid separation and recovery device.
JP2000334954A 2000-11-01 2000-11-01 Waste liquid separation and recovery method and separation and recovery apparatus Expired - Fee Related JP3944352B2 (en)

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WO2004110590A1 (en) * 2003-06-10 2004-12-23 Zeotek Research Institute Ltd. Waste water filtration system vehicle
JP2010064105A (en) * 2008-09-10 2010-03-25 Zeotek:Kk Regeneration method and regeneration system for parting agent waste liquid of aluminum die casting molding machine, and regeneration system vehicle
KR101153187B1 (en) 2012-04-12 2012-07-02 블루그린링크(주) Apparatus for purifying wastewater and method thereof
JP5685663B1 (en) * 2014-04-09 2015-03-18 株式会社群桐産業 Recycled heavy oil production method and production system
CN110201423A (en) * 2019-04-28 2019-09-06 袁承轩 A kind of automatic water cut-off device based on rotary process
CN110549774A (en) * 2019-09-06 2019-12-10 西安精雕软件科技有限公司 Centralized processing control method for cutting fluid of engraving center

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JP3008004U (en) * 1994-08-19 1995-03-07 株式会社シイエヌケイ Portable coolant cleaning device with floating oil pick-up tool

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JPS62183501U (en) * 1986-05-12 1987-11-21
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JPH05245471A (en) * 1992-03-03 1993-09-24 Toto Ltd Treatment of oil-containing waste water
JP3008004U (en) * 1994-08-19 1995-03-07 株式会社シイエヌケイ Portable coolant cleaning device with floating oil pick-up tool

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004110590A1 (en) * 2003-06-10 2004-12-23 Zeotek Research Institute Ltd. Waste water filtration system vehicle
US7387727B2 (en) 2003-06-10 2008-06-17 Zeotek Research Institute Ltd. Contaminated liquid filtration system vehicle
JP2010064105A (en) * 2008-09-10 2010-03-25 Zeotek:Kk Regeneration method and regeneration system for parting agent waste liquid of aluminum die casting molding machine, and regeneration system vehicle
KR101153187B1 (en) 2012-04-12 2012-07-02 블루그린링크(주) Apparatus for purifying wastewater and method thereof
WO2013154234A1 (en) * 2012-04-12 2013-10-17 주식회사 포스코건설 Wastewater-purifying apparatus and wastewater-purifying method
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JP5685663B1 (en) * 2014-04-09 2015-03-18 株式会社群桐産業 Recycled heavy oil production method and production system
CN110201423A (en) * 2019-04-28 2019-09-06 袁承轩 A kind of automatic water cut-off device based on rotary process
CN110201423B (en) * 2019-04-28 2024-05-03 袁承轩 Automatic water cutting device based on rotation method
CN110549774A (en) * 2019-09-06 2019-12-10 西安精雕软件科技有限公司 Centralized processing control method for cutting fluid of engraving center

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