JP2619264B2 - Reprocessing of lubricating waste oil - Google Patents
Reprocessing of lubricating waste oilInfo
- Publication number
- JP2619264B2 JP2619264B2 JP63155463A JP15546388A JP2619264B2 JP 2619264 B2 JP2619264 B2 JP 2619264B2 JP 63155463 A JP63155463 A JP 63155463A JP 15546388 A JP15546388 A JP 15546388A JP 2619264 B2 JP2619264 B2 JP 2619264B2
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- Prior art keywords
- oil
- lubricating
- diatomaceous earth
- waste oil
- impurities
- 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.)
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Description
【発明の詳細な説明】 産業上の利用分野 この発明は、冷間鍛造加工に使用した型潤滑油等の廃
油を再生使用するための潤滑廃油の再生処理方法に関す
るものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for regenerating lubricating waste oil for recycling waste oil such as mold lubricating oil used for cold forging.
従来の技術 金型を用いる冷間鍛造加工は、型通りの形状の部品が
素材から直接製造できるので生産性が高く、また無駄に
なる材料の発生が少なく省資源の面でも優れているた
め、自動車製造等において盛んに利用されている加工法
である。2. Description of the Related Art Cold forging using a mold is highly productive because parts having the same shape can be manufactured directly from the material, and is also excellent in terms of resource saving with less wasted material. This is a processing method that is actively used in automobile manufacturing and the like.
冷間鍛造加工は常温で行われるので、熱間鍛造加工と
比べ金型と素材間に大きな摩擦力がかかり、金型に型潤
滑油を塗布しただけでは、油膜の形成不全と耐熱性不足
とで焼付が起りやすい。そのため冷間鍛造加工において
は、加工用素材に予めリン酸塩被膜処理を施し、素材表
面に潤滑性、耐摩耗性に優れる被膜を形成してから加工
している。このため、油タンクと冷間鍛造機との間を循
環させながら使用している型潤滑油には、リン酸塩粕
（通称：ボンデ粕）の混入が避けられず、スラッジ（沈
澱物）、スカム（浮遊物）分が多くなるにつれてマシン
トラブルが発生しやすくなる。したがって、型潤滑油は
所定期間使用された後、新油と交換され、その周期は使
用状態で異なるが２〜４カ月が一般的である。Since cold forging is performed at room temperature, a large frictional force is applied between the mold and the material compared to hot forging, and simply applying mold lubrication oil to the mold may cause insufficient oil film formation and insufficient heat resistance. And seizure easily occurs. Therefore, in cold forging, a phosphate coating is applied to a working material in advance to form a film having excellent lubricity and abrasion resistance on the surface of the material before working. For this reason, the lubricating oil used while circulating between the oil tank and the cold forging machine is inevitably mixed with phosphate cake (commonly called bonde cake), and sludge (precipitate), Machine trouble is more likely to occur as the amount of scum (floating matter) increases. Therefore, after the mold lubricating oil has been used for a predetermined period of time, it is replaced with new oil, and its cycle varies depending on the state of use, but is generally 2 to 4 months.
交換された使用済の型潤滑油、すなわち夾雑物を多く
含んでいる廃油には、他の廃液（例えば特開昭61−1236
39号公報参照）にみられるような適切な処分方法が見い
出せなかったため、このような冷間鍛造型潤滑油の廃油
は、多くの場合、再生使用されることなく焼却処分され
ていた。Replaced used mold lubricating oils, that is, waste oils containing a large amount of contaminants, include other waste liquids (for example, JP-A-61-1236).
Since no suitable disposal method as found in Japanese Patent Application Laid-Open No. 39-39 was found, such waste oil of cold forging die lubricating oil was often incinerated without being recycled.
このように、冷間鍛造型潤滑油の廃油の再生使用があ
まり行われていないのは、廃油中に夾雑物が３％以上と
多く、かつ粘度が初期の高い粘度75cstから更に100cst
以上へとより高くなっていることから、夾雑物の分離排
除が困難なためであり、従来の一般的な廃油の再生処理
方法、例えば、廃油を加熱して粘度を下げ、夾雑物を静
置分離または遠心分離する方法で処理した場合には、夾
雑物除去率は30〜60％が限界であり、しかも一般的な加
熱温度（80℃）よりも20％増の100℃前後まで加熱しな
ければならなかった。As described above, the reason why the reuse of the waste oil of the cold forging type lubricating oil is rarely performed is that the waste oil contains a large amount of impurities of 3% or more, and the viscosity is increased from the initial high viscosity of 75 cst to 100 cst.
This is because it is difficult to separate and remove contaminants from the above, and the conventional general waste oil regeneration treatment method, for example, heating the waste oil to lower the viscosity and leaving the contaminants stationary When treated by the method of separation or centrifugation, the contaminant removal rate is limited to 30 to 60%, and it must be heated to around 100 ° C, which is 20% higher than the general heating temperature (80 ° C). I had to.
また、濾過助剤や吸着剤として珪藻土や活性白土を廃
油に加えて再生処理する方法も試みられている。例えば
第２図は、珪藻土を用いる従来の潤滑廃油の再生処理プ
ラントのプロセスフローシートを示すもので、容器１に
回収された使用済みの潤滑廃油は、加熱タンク２に送油
され、80℃以上に加熱して粘度を下げられた後、遠心分
離機３にかけられる。遠心分離機３により分離された夾
雑物は分離粕として分離粕タンク４に回収され、また分
離粕が除かれた分離油は分離油タンク５に回収される。
回収された分離油は、加熱脱水タンク６に送油されて10
0〜120℃に加熱され、水分は水蒸気として排出される。
水分を除去された処理油は、珪藻土混合タンク７に送油
され、処理油に含まれる夾雑物量に応じた量（例えば3.
0〜7.0％）の珪藻土が添加され、均一に分散するように
撹拌混合される。そして、珪藻土混合油は、フィルター
プレス８に送油されて濾過され、濾過残渣は濾過残渣パ
レット９に回収され、濾過された処理油は、再生油とし
て再生油タンク10に回収され、ドラム缶等の容器11に詰
められ、型潤滑油とし再使用される。Further, a method of regenerating a waste oil by adding diatomaceous earth or activated clay as a filter aid or an adsorbent has been attempted. For example, FIG. 2 shows a process flow sheet of a conventional lubricating waste oil regeneration treatment plant using diatomaceous earth. The used lubricating waste oil collected in the container 1 is sent to the heating tank 2 and is heated to 80 ° C. or higher. After being heated to lower the viscosity, the mixture is centrifuged 3. The contaminants separated by the centrifugal separator 3 are collected as separated cake in the separated cake tank 4, and the separated oil from which the separated cake has been removed is collected in the separated oil tank 5.
The recovered separated oil is sent to the heating and dewatering tank 6 and
Heated to 0-120 ° C, water is discharged as water vapor.
The treated oil from which water has been removed is sent to the diatomaceous earth mixing tank 7 and the amount corresponding to the amount of impurities contained in the treated oil (for example, 3.
(0-7.0%) diatomaceous earth is added and stirred and mixed so as to be uniformly dispersed. Then, the diatomaceous earth mixed oil is fed to a filter press 8 and filtered, the filtration residue is collected on a filtration residue pallet 9, and the filtered treated oil is collected as recycled oil in a recycled oil tank 10 and used for drums and the like. It is packed in a container 11 and reused as a mold lubricating oil.
発明が解決しようとする課題 しかし、前記した従来の再生処理方法においては、例
えば珪藻土の添加量が不足していると、フィルタープレ
スの濾過目詰りが早く、処理不能等の処理トラブルが発
生しやすかった。この濾過目詰りの原因としては、直径
１〜30μ程度のボンデ粕の微粒子が、珪藻土の細孔を閉
塞するためと推定され、その対応策として濾布の洗浄等
を頻繁に実施して再生処理を行なう必要があった。Problems to be Solved by the Invention However, in the above-mentioned conventional regeneration treatment method, if the amount of diatomaceous earth added is insufficient, for example, filter clogging of the filter press is fast, and processing troubles such as inability to treat are likely to occur. Was. The cause of this filter clogging is presumed to be that fine particles of bonde cake having a diameter of about 1 to 30 μ block the pores of the diatomaceous earth. Had to be done.
また、上記した従来の方法で再生処理した場合には、
再生油の夾雑物含有量（SS値）が0.2〜1.0％の範囲で、
直径１μ以下のボンデ粕の微粒子が残存している。その
ため、この再生油を潤滑油としそのまま再使用すると、
再生油の油寿命が非常に短くなってしまうことから、再
生処理した潤滑油に、型潤滑油の新油を50％程度混合し
て使用しなければならない等の問題点があった。In addition, when the reproduction process is performed by the above-described conventional method,
When the content of contaminants (SS value) of the reclaimed oil is in the range of 0.2 to 1.0%,
Fine particles of bonde lees having a diameter of 1 μ or less remain. Therefore, if this recycled oil is used as lubricating oil and reused as it is,
Since the oil life of the reclaimed oil is extremely shortened, there is a problem that about 50% of the new lubricating oil must be mixed with the regenerated lubricating oil and used.
この発明は上記した技術的背景の下になされたもの
で、濾過助剤の使用量の低減を図るとともに、夾雑物の
除去率を向上させかつ濾過トラブルの発生を防止すると
ともに、再生油の回収率の高い潤滑廃油の再生処理方法
の提供を目的としている。The present invention has been made under the above-mentioned technical background, and aims to reduce the amount of filter aid used, improve the removal rate of contaminants, prevent the occurrence of filtration troubles, and recover recycled oil. It aims at providing a method of regenerating lubricating waste oil with high efficiency.
課題を解決するための手段 上記課題を解決するための手段としてこの発明の潤滑
廃油の再生処理方法は、潤滑廃油に苛性アルカリ水溶液
を添加して100℃以上に加熱し、潤滑廃油中の夾雑物中
の微粒子を粗粒化させることによって沈澱させて除去す
る加熱反応処理工程を行った後、珪藻土と活性白土とを
添加して均一に分散させ、夾雑物中の微粒子をその細孔
中に吸着させるとともに、珪藻土と活性白土とを遠心分
離機により分離除去する遠心分離処理工程を行うことに
よって、潤滑廃油中の夾雑物を除去した後、さらに珪藻
土等の濾過助剤を添加し、濾過して潤滑廃油中の夾雑物
を除去する濾過処理工程を行うことを特徴としている。Means for Solving the Problems As a means for solving the above problems, the lubricating waste oil regenerating treatment method of the present invention comprises adding a caustic aqueous solution to the lubricating waste oil, heating the lubricating waste oil to 100 ° C. or higher, and removing impurities in the lubricating waste oil. After performing a heating reaction process to precipitate and remove fine particles in the material by coarsening, diatomaceous earth and activated clay are added and dispersed uniformly, and fine particles in impurities are adsorbed in the pores. While removing the impurities in the lubricating waste oil by performing a centrifugation treatment step of separating and removing diatomaceous earth and activated clay with a centrifugal separator, a filter aid such as diatomaceous earth is further added and filtered. It is characterized in that a filtration step for removing impurities in lubricating waste oil is performed.
作用 上記の方法によれば、先ず、加熱反応処理工程が行わ
れ、夾雑物を含む潤滑廃油に苛性アルカリ水溶液が添加
されかつ100℃以上に加熱されると、夾雑物中に含まれ
るリン酸亜鉛等のリン酸塩被膜粕の微粒子が化学変化し
て粗粒化される。Action According to the above method, first, a heating reaction treatment step is performed, and when a caustic aqueous solution is added to the lubricating waste oil containing impurities and heated to 100 ° C. or higher, zinc phosphate contained in the impurities is The fine particles of the phosphate coating residue are chemically changed and coarsened.
例えば、難溶性リン酸亜鉛は、亜鉛水酸化物、亜鉛石
鹸等の化合物となって沈澱し、水分も同時に除去され
る。For example, poorly soluble zinc phosphate precipitates as a compound such as zinc hydroxide and zinc soap, and water is simultaneously removed.
そして、遠心分離処理工程では、分離助剤として珪藻
土と活性白土の混合物を添加し、夾雑物中の微粒子を珪
藻土および活性白土の細孔中に吸着させて遠心分離機に
かけると、夾雑物が珪藻土および活性白土と共に効率的
に分離除去される。 Then, in the centrifugal separation process, a mixture of diatomaceous earth and activated clay is added as a separation aid, fine particles in the impurities are adsorbed in the pores of the diatomaceous earth and activated clay, and the mixture is centrifuged. It is efficiently separated and removed together with diatomaceous earth and activated clay.
そして上記二工程で夾雑物が除去された潤滑廃油は濾
過工程に供給され、濾過工程では、例えば珪藻土等の濾
過助剤を添加してフィルタープレス等により濾過する
と、潤滑廃油中の夾雑物が濾過助剤とともに除去され
る。The lubricating waste oil from which the contaminants have been removed in the above two steps is supplied to a filtration step. In the filtering step, for example, a filter aid such as diatomaceous earth is added and filtered by a filter press or the like. Removed with auxiliaries.
したがって、夾雑物中のリン酸塩被膜の微粒子は、加
熱反応処理工程で粗粒化され沈澱して除去されるととも
に、遠心分離処理工程で、珪藻土等に吸着して分離除去
されているため、濾過工程においては珪藻土等が濾過目
詰まりすることなく、効率良く濾過される。Therefore, the phosphate coating fine particles in the contaminants are coarsened and settled and removed in the heating reaction treatment step, and are separated and removed by adsorption to diatomaceous earth and the like in the centrifugation treatment step. In the filtration step, diatomaceous earth and the like are efficiently filtered without clogging.
実 施 例 以下、この発明の潤滑廃油の再生処理方法の一実施例
を第１図に示す再生処理のプロセスフローシートを参照
して説明する。Embodiment Hereinafter, an embodiment of the method for regenerating lubricating waste oil according to the present invention will be described with reference to the process flow sheet of the regenerating process shown in FIG.
冷間鍛造加工に使用された型潤滑油の廃油には、多量
のボンデ粕等の夾雑物が含まれ、これらの夾雑物は、常
温では廃油の粘度が高いため沈澱せずに廃油中に分散し
ている。夾雑物の組成としては、水分、鉄酸化物、鉄水
酸化物、リン酸亜鉛（ボンデ粕）、シリカ（塵埃）等
で、この廃油は、ドラム缶等の容器11より先ず加熱反応
タンク12へ送油されて、濃度0.1％程度の苛性ソーダあ
るいは苛性カリ等の苛性アルカリ水溶液が添加される。
この苛性アルカリ水溶液の添加量は、廃油の量の２〜５
％程度で、添加後は加熱反応タンク12内に配設したスチ
ームヒータによって100℃以上に加熱される。苛性アル
カリ水溶液を添加されるとともに加熱された廃油は、特
にリン酸亜鉛の微粒子が亜鉛水酸化物や亜鉛石鹸に化学
変化し、粗粒化するとともに沈澱してスラリー化する。
この加熱反応時間は、30〜60分程度で完了する。そし
て、加熱反応タンク12内に沈澱した夾雑物のスラリー
は、下部のドレンより排出されてスラリータンク13に回
収される。The waste lubricating oil used in the cold forging process contains a large amount of impurities such as bond cakes, and these impurities are dispersed in the waste oil without precipitation due to the high viscosity of the waste oil at room temperature. doing. The composition of impurities is moisture, iron oxide, iron hydroxide, zinc phosphate (bonds), silica (dust), and the like. This waste oil is first sent to the heating reaction tank 12 from a container 11 such as a drum. After being oiled, a caustic alkali aqueous solution such as caustic soda or caustic potash having a concentration of about 0.1% is added.
The amount of the aqueous caustic solution added is 2 to 5 times the amount of waste oil.
After the addition, the mixture is heated to 100 ° C. or higher by a steam heater disposed in the heating reaction tank 12. The waste oil heated by adding the aqueous caustic alkali solution, in particular, the zinc phosphate fine particles are chemically transformed into zinc hydroxide and zinc soap, and are coarsened and precipitated to form a slurry.
This heating reaction time is completed in about 30 to 60 minutes. Then, the slurry of the contaminants precipitated in the heating reaction tank 12 is discharged from the lower drain and collected in the slurry tank 13.
一方、加熱反応タンク12に残った処理油は、加熱タン
ク14に送油され、活性白土と珪藻土とを2.5％程度投入
されて撹拌混合される。そして、混合処理油は、スチー
ムヒータで100℃以上に加熱され、活性白土と珪藻土の
細孔中に含まれている水分を追い出し、代りに処理油中
の夾雑物の微粒子を前記細孔内に吸着させる。この吸着
に要する時間は30〜60分程度である。次に遠心分離機15
にかけられ、夾雑物を吸着した活性白土および珪藻土
は、分離粕として分離粕タンク16に回収され、分離油
は、分離油タンク17に回収される。On the other hand, the treated oil remaining in the heating reaction tank 12 is sent to the heating tank 14, where about 2.5% of activated clay and diatomaceous earth are added and stirred and mixed. Then, the mixed treated oil is heated to 100 ° C. or higher by a steam heater to drive out the water contained in the pores of the activated clay and diatomaceous earth, and instead, the fine particles of the impurities in the treated oil are introduced into the pores. Adsorb. The time required for the adsorption is about 30 to 60 minutes. Next, centrifuge 15
The activated clay and the diatomaceous earth having the contaminants adsorbed thereon are collected as separated cake in a separated cake tank 16, and the separated oil is collected in a separated oil tank 17.
そして、分離油タンク17に回収された分離油は、加熱
脱水タンク18に送油され、スチームヒータで110℃以上
に加熱して、水分を水蒸気として除去される。Then, the separated oil collected in the separated oil tank 17 is sent to the heating and dewatering tank 18 and heated to 110 ° C. or higher by a steam heater to remove water as steam.
さらに、水分除去油は、珪藻土混合タンク19に送油さ
れるとともに、油量の１〜３％程度の珪藻土が投入され
るとともに、100℃以上に加熱されて撹拌混合される。3
0分程度撹拌混合した後、フィルタープレス20に送られ
て濾過され、濾過残渣は濾過残渣パレット21に回収さ
れ、直径１μ以上の夾雑物は殆ど除去されて、再生油タ
ンク22に回収され、再生油は、品質検査を行なった後、
ドラム缶等の容器23に詰められ、型潤滑油として使用に
共される。Further, the water-removed oil is sent to the diatomaceous earth mixing tank 19, and diatomaceous earth of about 1 to 3% of the oil amount is charged, and heated to 100 ° C. or higher to be stirred and mixed. Three
After stirring and mixing for about 0 minutes, the mixture is sent to a filter press 20 and filtered. The filtration residue is collected on a filtration residue pallet 21, and impurities having a diameter of 1 μ or more are almost removed, collected in a reclaimed oil tank 22, and regenerated. After the oil has been inspected for quality,
It is packed in a container 23 such as a drum and used as a mold lubricant.
次に、この実施例の潤滑廃油の再生処理方法によって
実際に再生処理を行った実施例１と、加熱反応処理工程
の効果を見るために実施例１における加熱反応処理工程
を省略して再生処理を行なった参考例１と、従来法によ
り再生処理を行なった比較例について説明する。Next, in Example 1 in which the regeneration treatment was actually performed by the lubricating waste oil regeneration method in this example, and in order to see the effect of the heating reaction treatment step, the heating reaction treatment step in Example 1 was omitted to regenerate the treatment Reference Example 1 in which the reproduction process is performed and a comparative example in which the reproduction process is performed by the conventional method will be described.
［比較例１］ 供試油は、冷間鍛造型潤滑剤（協同油脂（株）製・サ
ルクラットＹ−50A）の廃油で、その性状は第１表に示
す通りである。[Comparative Example 1] The test oil was a waste oil of a cold forging type lubricant (Sarkrat Y-50A manufactured by Kyodo Yushi Co., Ltd.), and the properties are as shown in Table 1.
上記供試油を、第２図にプロセスフローシートを示す
従来の再生処理方法で処理を行ない、その遠心分離処理
油と再生油のそれぞれの性状と、比較用に新油の性状と
を第２表に示す。なお、珪藻土は処理油量に対して約6.
0％添加した。 The test oil is treated by a conventional regeneration treatment method shown in the process flow sheet in FIG. 2, and the properties of the centrifuged oil and the regenerated oil and the properties of the new oil for comparison are shown in the second. It is shown in the table. Diatomaceous earth is about 6.
0% was added.
そして、供試油、遠心分離処理油、再生油の三者の油
中金属元素をICP分析装置（ICPとは、Inductively Coup
led Plasmaの略）で分析した結果を第３表に示す。Then, the three metal elements in the oil, the test oil, the centrifuged oil, and the reclaimed oil, are analyzed by an ICP analyzer (ICP is Inductively Coup
Table 3 shows the results of analysis using led plasma.
その結果、例えば供試油に含有される亜鉛の量が、比
較例１では8655ppmから7487ppmまで減少し、約13％除去
されている。 As a result, for example, in Comparative Example 1, the amount of zinc contained in the test oil was reduced from 8655 ppm to 7487 ppm, and about 13% was removed.
［実施例１］ 比較例で用いた供試油と同等の廃油を、第１図に示す
本発明の方法のプロセスフローシートにしたがって再生
処理した。但し、処理油に対する添加量は、苛性ソーダ
が3.0％、分離助剤としての珪藻土および活性白土の混
合物が2.5％、濾過助剤としての珪藻土が1,0％である。Example 1 A waste oil equivalent to the test oil used in the comparative example was regenerated according to the process flow sheet of the method of the present invention shown in FIG. However, the addition amount to the treated oil is 3.0% for caustic soda, 2.5% for a mixture of diatomaceous earth and activated clay as a separation aid, and 1.0% for diatomaceous earth as a filter aid.
そして、供試油の性状および遠心分離処理油の性状、
再生油の性状をそれぞれ第４表に示す。また、各処理段
階における油中金属元素の分析結果を第５表に示す。And the properties of the test oil and the properties of the centrifuged oil,
Table 4 shows the properties of the regenerated oil. Table 5 shows the results of analysis of metal elements in oil at each treatment stage.
その結果、例えば供試油に含有される亜鉛の量が、実
施例１では7217ppmから4487ppmまで減少し、約38％除去
されている。 As a result, for example, in Example 1, the amount of zinc contained in the test oil was reduced from 7217 ppm to 4487 ppm, and about 38% was removed.
なお、遠心分離処理工程で潤滑廃油中に添加する分離
助剤は、珪藻土と活性白土とを1:1の割合で混合しもの
を用い、その添加量は、廃油中の夾雑物の量（SS値）に
応じて適宜決定される。The separation aid to be added to the lubricating waste oil in the centrifugal separation process is a mixture of diatomaceous earth and activated clay mixed at a ratio of 1: 1. The amount added is the amount of contaminants in the waste oil (SS Value).
［参考例１］ 実施例１と同等な廃油を、第１図のプロセスフローシ
ートに示す方法のうち加熱反応処理工程を省略して再生
処理した。なお、処理油に対する添加量は、分離助剤と
しの珪藻土と活性白土との混合物が3.0％、濾過助剤と
しての珪藻土が2.5％である。Reference Example 1 Waste oil equivalent to that of Example 1 was subjected to a regeneration treatment by omitting the heating reaction treatment step in the method shown in the process flow sheet of FIG. The amount of the diatomaceous earth added to the treated oil is 3.0% for a mixture of diatomaceous earth and activated clay as a separation aid, and 2.5% for diatomaceous earth as a filter aid.
そして、供試油の性状および遠心分離処理油の性状、
再生油の性状をそれぞ第６表に示す。また、油中金属元
素の分析結果を第７表に示す。And the properties of the test oil and the properties of the centrifuged oil,
Table 6 shows the properties of the regenerated oil. Table 7 shows the analysis results of the metal elements in the oil.
その結果、例えば供試油に含有される亜鉛の量が、参
考例１では6755ppmから5160ppmまで減少し、約23％除去
されている。 As a result, for example, in Reference Example 1, the amount of zinc contained in the test oil was reduced from 6755 ppm to 5160 ppm, and about 23% was removed.
また、比較例１と実施例１と参考例１とを、それぞれ
の処理方法で得られた再生油のSS値で比較すると、従来
法による比較例１で処理された再生油が0.6％、実施例
１で処理された再生油では0.04％、加熱反応処理工程を
行わなかった参考例１では0.41％であった。In addition, comparing Comparative Example 1, Example 1, and Reference Example 1 with the SS values of the reclaimed oil obtained by the respective treatment methods, the reclaimed oil treated in Comparative Example 1 by the conventional method was 0.6%. It was 0.04% in the reclaimed oil treated in Example 1 and 0.41% in Reference Example 1 in which the heating reaction treatment step was not performed.
発明の効果 以上説明したようにこの発明の方法によれば、加熱反
応処理工程において、潤滑廃油に苛性アルカリ水溶液を
添加して100℃以上に加熱し、夾雑物を化学変化させ、
沈澱させて除去した後、遠心分離処理工程において、分
離助剤として珪藻土と活性白土とを添加し、夾雑物と共
に遠心分離機により分離除去した後、さらに、濾過処理
工程において、珪藻土等の濾過助剤を添加し、濾過して
潤滑廃油中の夾雑物を除去するようにしたので、加熱反
応処理工程において夾雑物の微粒子が粗粒化され、沈澱
して除去されるとともに、遠心分離処理工程での夾雑物
の分離性が向上する結果、濾過処理工程における濾過目
詰りによるトラブルの発生がなくなり、夾雑物の除去率
が従来法の場合の40％から70％に向上した。また遠心分
離処理工程の前工程として加熱反応処理工程が実施され
ることにより、珪藻土と活性白土との使用量を従来に比
べて大幅に低減することができる。Effects of the Invention As described above, according to the method of the present invention, in the heating reaction treatment step, an aqueous solution of caustic alkali is added to the lubricating waste oil and heated to 100 ° C. or more to chemically change impurities,
After sedimentation and removal, diatomaceous earth and activated clay are added as separation aids in a centrifugal separation step, and separated and removed by a centrifugal separator together with contaminants. An additive was added and filtered to remove contaminants in the lubricating waste oil.Thus, the fine particles of the contaminants were coarsened in the heating reaction treatment step, and were removed by settling. As a result, the trouble caused by clogging of the filtration in the filtration step was eliminated, and the removal rate of the contamination was improved from 40% in the conventional method to 70%. Further, by performing the heating reaction treatment step as a pre-step of the centrifugal separation treatment step, the amount of diatomaceous earth and activated clay can be significantly reduced as compared with the conventional case.
また、従来法の場合には、0.1〜1.0％程度であった再
生油のSS値を、0.1％以下に清澄化でき、形潤滑油とし
て100％再生油のみで使用できるようになり、新油の使
用量を低減することができる。In addition, in the case of the conventional method, the SS value of the regenerated oil, which was about 0.1 to 1.0%, can be clarified to 0.1% or less, and the lubricating oil can be used only with 100% regenerated oil as a form lubricant. Can be reduced.
さらに、濾過目詰り等のトラブルの発生が減り、生じ
る分離粕等も減少するため、従来法の場合には30〜50％
であった再生油の回収率を65％以上に向上できる等の効
果を有する。Furthermore, since the occurrence of troubles such as filter clogging is reduced, and the amount of separated cake and the like is also reduced, the conventional method is 30 to 50%
This has the effect of improving the recovery rate of recycled oil to 65% or more.
第１図はこの発明の方法の一実施例を示す再生処理設備
のプロセスフローシート、第２図は従来の再生処理設備
のプロセスフローシートである。 12……加熱反応タンク、14……加熱タンク、15……遠心
分離機、17……分離油タンク、18……加熱脱水タンク、
19……珪藻土混合タンク、20……フィルタープレス、22
……再生油タンク、23……ドラム缶等の容器。FIG. 1 is a process flow sheet of a regeneration processing facility showing an embodiment of the method of the present invention, and FIG. 2 is a process flow sheet of a conventional regeneration processing facility. 12: Heated reaction tank, 14: Heated tank, 15: Centrifuge, 17: Separated oil tank, 18: Heated dehydration tank,
19 ... Diatomaceous earth mixing tank, 20 ... Filter press, 22
... Reclaimed oil tank, 23 ... Containers such as drums.
Claims (1)
100℃以上に加熱し、潤滑廃油中の夾雑物中の微粒子を
粗粒化させることによって沈澱させて除去する加熱反応
処理工程を行った後、珪藻土と活性白土とを添加して均
一に分散させ、夾雑物中の微粒子をその細孔中に吸着さ
せるとともに、珪藻土と活性白土とを遠心分離機により
分離除去する遠心分離処理工程を行うことによって、潤
滑廃油中の夾雑物を除去した後、さらに珪藻土等の濾過
助剤を添加し、濾過して潤滑廃油中の夾雑物を除去する
濾過処理工程を行うことを特徴とする潤滑廃油の再生処
理方法。An aqueous solution of caustic alkali is added to waste lubricating oil.
After heating to 100 ° C or higher, and performing a heating reaction treatment step of precipitating and removing fine particles in contaminants in the lubricating waste oil by coarsening, diatomaceous earth and activated clay are added and uniformly dispersed. By removing the impurities in the lubricating waste oil by performing a centrifugation treatment step of adsorbing the fine particles in the impurities in the pores thereof and separating and removing the diatomaceous earth and the activated clay with a centrifuge, A method of regenerating lubricating waste oil, comprising adding a filter aid such as diatomaceous earth and performing a filtration step of filtering to remove impurities in the lubricating waste oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63155463A JP2619264B2 (en) | 1988-06-23 | 1988-06-23 | Reprocessing of lubricating waste oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63155463A JP2619264B2 (en) | 1988-06-23 | 1988-06-23 | Reprocessing of lubricating waste oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH024898A JPH024898A (en) | 1990-01-09 |
| JP2619264B2 true JP2619264B2 (en) | 1997-06-11 |
Family
ID=15606601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63155463A Expired - Lifetime JP2619264B2 (en) | 1988-06-23 | 1988-06-23 | Reprocessing of lubricating waste oil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2619264B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2068905C (en) * | 1992-05-19 | 1997-07-22 | Terry A. Wilson | Waste lubricating oil pretreatment process |
| JP2003082382A (en) * | 2001-09-14 | 2003-03-19 | Japan Atom Energy Res Inst | Method for purifying waste lubricating oil by water addition centrifugation |
| HU225697B1 (en) * | 2001-11-20 | 2007-06-28 | Jozsef Koszta | Method for purifying of used oils |
| KR20030069367A (en) * | 2002-02-20 | 2003-08-27 | 대양대체에너지 주식회사 | Method for extracting an emulsion type fuel oil from all sorts of defective oil and apparatus for the same |
| US8299001B1 (en) | 2006-09-18 | 2012-10-30 | Martin De Julian Pablo | Process for recovering used lubricating oils using clay and centrifugation |
| JP5299345B2 (en) * | 2010-04-13 | 2013-09-25 | 新日鐵住金株式会社 | Lubricating oil cleaning device, drawing machine equipped with the same, lubricating oil cleaning method and drawing method using the same |
| WO2012009749A1 (en) * | 2010-07-19 | 2012-01-26 | Loyal Asset Development Limited | Process for treating used oil |
| JP6668677B2 (en) | 2015-10-22 | 2020-03-18 | 株式会社ソシオネクスト | A / D converter, A / D conversion method, and semiconductor integrated circuit |
| CN107569901B (en) * | 2017-10-10 | 2023-01-06 | 杨继新 | Reduce oil carbon residue device |
| CN113604810A (en) * | 2021-09-07 | 2021-11-05 | 鹰普机械（宜兴）有限公司 | Sand casting cleaning method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5112801A (en) * | 1974-07-23 | 1976-01-31 | Toa Nenryo Kogyo Kk | Junkatsuyuhaiyuno saiseiho |
| DE2818521A1 (en) * | 1978-04-27 | 1979-11-08 | Degussa | METHOD FOR REPROCESSING USED LUBRICANTS (II) |
-
1988
- 1988-06-23 JP JP63155463A patent/JP2619264B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH024898A (en) | 1990-01-09 |
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