JP5000869B2 - Waste oil treatment method - Google Patents
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- JP5000869B2 JP5000869B2 JP2005250731A JP2005250731A JP5000869B2 JP 5000869 B2 JP5000869 B2 JP 5000869B2 JP 2005250731 A JP2005250731 A JP 2005250731A JP 2005250731 A JP2005250731 A JP 2005250731A JP 5000869 B2 JP5000869 B2 JP 5000869B2
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- 239000002699 waste material Substances 0.000 title claims description 47
- 238000000034 method Methods 0.000 title claims description 21
- 238000000926 separation method Methods 0.000 claims description 19
- 238000007667 floating Methods 0.000 claims description 12
- 238000013019 agitation Methods 0.000 claims description 9
- 238000004062 sedimentation Methods 0.000 claims description 4
- 238000005339 levitation Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 99
- 235000019198 oils Nutrition 0.000 description 99
- 239000010410 layer Substances 0.000 description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 239000000446 fuel Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000002828 fuel tank Substances 0.000 description 4
- 239000010731 rolling oil Substances 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000005188 flotation Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229920006318 anionic polymer Polymers 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Removal Of Floating Material (AREA)
Description
本発明は、廃油の処理方法に関するものであり、さらに詳しく述べるならば、非鉄金属の製錬所でディーゼル発電設備のＣ重油及び潤滑油を遠心分離する際に発生する水分を含む廃油や、往復駆動式圧縮機から発生する油を含むドレンの処理方法に関するものである。これらの廃油は、油分濃度が１０重量％以下であり、有効な処理法がなかったので、産業廃棄物業者に燃焼処理を委託していたものの、カロリー不足は否めなかった。 The present invention relates to a method for treating waste oil, and more specifically, waste oil containing water generated when C heavy oil and lubricating oil in a diesel power generation facility are centrifuged at a non-ferrous metal smelter, The present invention relates to a method for treating drainage containing oil generated from a drive compressor. These waste oils had an oil concentration of 10% by weight or less, and there was no effective treatment method. Therefore, although combustion treatment was entrusted to an industrial waste contractor, caloric deficiency could not be denied.
油分濃度が高い廃棄油を、燃焼処理することは、非特許文献１、「資源と素材」Vol. 113(1997)No.12,「リサイクリング大特集号」 第1175頁「日鉱金属株式会社日立Ｃ＆Ｒ工場」事例」においても紹介されている。 Non-Patent Document 1, “Resources and Materials” Vol. 113 (1997) No. 12, “Special Issue on Recycling”, page 1175, “Nikko Metals Corporation Hitachi,” It is also introduced in “C & R Factory”.
一方、燃焼処理に適していない油分濃度が低い油水混合物の処理に関しては次の方法が知られている。
特許文献１、特許第３６４００７０号公報で提案される油水分離除去装置は、事故による海水もしくは湖沼の汚染を防止することを対象としており、海水などに汚染が広がらないことを考慮した、次のような操作を順次行っている。（１）油分の多い表面付近の油水をフロートポンプにより汲み上げる。（２）第１の浮上油分離及び分離油のオイルスキマーによる回収。（３）第２，第３の浮上油分離。（４）第３の浮上分離槽に含まれている油分の活性炭による吸着。（５）浮上分離後の油水に残存する油分のエマルジョン化及び凝固処理。なお、浮上油分離では、油水表面の油が底部に到達しないように邪魔板、水分散ストレーナなどを使用している。
On the other hand, the following method is known for the treatment of an oil-water mixture having a low oil concentration that is not suitable for combustion treatment.
The oil / water separation / removal device proposed in Patent Literature 1 and Patent No. 3640070 is intended to prevent pollution of seawater or lakes due to an accident, considering that pollution does not spread to seawater and the like as follows The operations are performed sequentially. (1) Pump up oil water near the oily surface with a float pump. (2) First floating oil separation and recovery of the separated oil by an oil skimmer. (3) Second and third floating oil separation. (4) Adsorption by activated carbon of oil contained in the third flotation tank. (5) Emulsification and coagulation treatment of the oil remaining in the oily water after floating separation. In the floating oil separation, a baffle plate, a water dispersion strainer or the like is used so that the oil on the surface of the oil water does not reach the bottom.
特許文献２、特開平１０−１６５７０４号公報は、切削、研削などの機械加工において使用される水系クーラント液に混入した油分を回収するためにベルトスキマーが使用されていたことを明らかにしている。但し、ベルトスキマーは回収速度が極めて遅いために、この公報では、ステンレス鋼又は銅などの数十メッシュの金網を多層に積層したデミスタを油滴が通過する際に粒子に成長することを利用した浮上分離を提案している。 Japanese Patent Application Laid-Open No. 10-165704 discloses that a belt skimmer is used to recover oil mixed in an aqueous coolant used in machining such as cutting and grinding. However, since the belt skimmer has a very low recovery rate, this publication utilizes the fact that oil droplets grow into particles when passing through a demister in which several tens of meshes such as stainless steel or copper are laminated in multiple layers. Proposed levitation separation.
特許文献３、特開平１１−３４３４９４号公報は、アルミニウム熱間圧延油回収・浄化システムにおいて、次の時系列操作を提案している。（１）圧延機から圧延油をピットに回収。（２）ポンプで圧延油を槽に集める。（３）圧延によって発生した摩耗紛のうち槽上部に浮上したもののみをベルトスキマー及びドラムスキマーにより系外に排出する。（４）槽下部からフィルターポンプによる液の抜き出し。（５）濾紙抜きフィルターによる濾過。（６）クーリング槽に貯液。（７）サプライポンプ及びスプレーにより圧延機に圧延油噴射。したがって、特許文献３で提案された方法の除去対象はごみなどであり、油分について、濃縮回収は行っていない。 Japanese Patent Application Laid-Open No. 11-343494 proposes the following time series operations in an aluminum hot rolling oil recovery / purification system. (1) Recover rolling oil from rolling mills into pits. (2) Collect the rolling oil in a tank with a pump. (3) Of the wear powder generated by rolling, only those floating on the tank upper part are discharged out of the system by the belt skimmer and drum skimmer. (4) Extraction of liquid from the bottom of the tank using a filter pump. (5) Filtration with a filter paper removal filter. (6) The liquid is stored in the cooling tank. (7) Rolling oil is injected into the rolling mill with a supply pump and spray. Therefore, the removal target of the method proposed in Patent Document 3 is garbage and the like, and the oil is not concentrated and recovered.
本発明が処理対象とする廃油に、例えば、特許文献１で提案された3段階浮上分離を適用しても、一旦高油分濃度部分を除去した廃油の分離はほとんどに進行しない。さらに、特許文献１で提案されたフロートポンプを使用すると、かなりの水分が巻き込まれるために、燃料としてのカロリーが不足する。また、特許文献２で提案されたデミスタを適用しても、同様に油分の濃縮分離は進行しない。
したがって、本発明の課題は、油濃度の薄い廃油から濃度の高い廃油を回収し、処理対象の廃油中の水分は、排水として廃棄できるように処理することである。
Even if, for example, the three-stage floating separation proposed in Patent Document 1 is applied to the waste oil to be treated by the present invention, the separation of the waste oil from which the high oil concentration portion has been removed hardly proceeds. Furthermore, when the float pump proposed in Patent Document 1 is used, a considerable amount of moisture is involved, resulting in insufficient calories as fuel. Moreover, even if the demister proposed in Patent Document 2 is applied, the concentration and separation of the oil does not proceed in the same manner.
Therefore, the subject of this invention is collect | recovering waste oil with high concentration from waste oil with low oil concentration, and is processing so that the water | moisture content in the waste oil of a process target can be discarded as waste water.
本発明が処理対象とする代表的廃油の性状は表1に示すとおりである。なお、表において、上層とは、廃油を採取できる最表面であり、廃油深さ全体の表面から1/50であり、また中層及び下層とはそれぞれ表面から1/3及び表面から2/3の箇所である。
表１の結果から、廃油を沈降処理すると、廃油は表面に極めて油分濃度が高い層を作り、ほとんどが水である中層及び下層とは極端に油分濃度の差があることが分かる。また、油分濃度が高い上層は廃油全体の厚さに対して極めて薄いことが分かる。よって、廃油では沈降処理により分離がかなり進行しているので、上層の高油分濃度の部分を予め燃料として回収することができることが分かった。
Table 1 shows the properties of representative waste oils to be treated by the present invention. In the table, the upper layer is the outermost surface from which waste oil can be collected, 1/50 from the entire surface of the waste oil depth, and the middle layer and lower layer are 1/3 from the surface and 2/3 from the surface, respectively. It is a place.
From the results in Table 1, it can be seen that when the waste oil is settled, the waste oil forms a layer with a very high oil concentration on the surface, and the oil concentration is extremely different from the middle and lower layers, which are mostly water. Moreover, it turns out that the upper layer with a high oil concentration is very thin with respect to the thickness of the whole waste oil. Therefore, it was found that the separation of the waste oil is proceeding considerably by the sedimentation process, so that the high oil concentration portion in the upper layer can be recovered in advance as fuel.
本発明者らは、廃油を能率的に処理することができる方法につき、鋭意検討した結果、全体の油分濃度が１０質量％以下である廃油を沈降処理して、高油分濃度上層と、油分濃度が1質量％以下の下層とに分離し、ベルトスキマーにより前記高油分濃度上層を予め回収し、その後前記下層の廃油を空気攪拌し、続いて凝集剤添加及び加圧浮上分離処理を行うことを特徴とする廃油の処理方法を完成した。以下、本発明の処理方法を詳しく説明する。 As a result of intensive studies on a method capable of efficiently treating waste oil, the present inventors settled waste oil having an overall oil concentration of 10% by mass or less to obtain a high oil concentration upper layer and an oil concentration. Is separated into a lower layer of 1% by mass or less, and the high oil concentration upper layer is collected in advance by a belt skimmer, and then the lower layer waste oil is stirred with air, followed by addition of a flocculant and pressure floating separation treatment. A featured waste oil treatment method was completed. Hereinafter, the processing method of the present invention will be described in detail.
まず、本発明者は、本出願人の製錬所で生成した廃油の性状に着目したところ、廃油が例えばテ゛ィーゼル発電機から1m3/日の流量で排出され、受槽に溜められ１〜2日以上経過した状態では、沈降分離が表1に示されるように進行し、上層は燃料として使用できるほど油分濃度が高く、一方下層（即ち、表１の中層、下層）では油分濃度が１質量％を超えることがないことを確かめた。（1文削除）。
さらに、廃油発生源により、廃油には次のような性状の差がある。
First, the present inventor paid attention to the properties of the waste oil produced at the applicant's smelter, and the waste oil was discharged from a diesel generator at a flow rate of 1 m 3 / day and stored in a receiving tank for 1-2 days. In the state where the above has elapsed, sedimentation separation proceeds as shown in Table 1, and the upper layer has an oil concentration that is high enough to be used as fuel, while the lower layer (ie, middle layer and lower layer in Table 1) has an oil concentration of 1% by mass. It was confirmed that it would not exceed. (Delete one sentence).
Furthermore, there are differences in the properties of waste oil as follows, depending on the source of waste oil.
種別Ａは油分濃度が高く、種別Ｂは油分濃度が低い。また、発生源での油使用量や発生源の機械の運転方式により、廃油の発生量やタイミングに差がある。これらの廃油は、前後して別処理することができ、あるいは混合して一括処理することもできる。 Type A has a high oil concentration, and type B has a low oil concentration. In addition, there is a difference in the amount and timing of waste oil generation depending on the amount of oil used at the source and the operation method of the machine at the source. These waste oils can be processed separately before and after, or can be mixed and processed together.
図１は、本発明で使用されるベルトスキマー装置の実施例を示しており、図中、１はベルトスキマー、２はスキミング槽、３は廃油、４はホィール、５はベルト、６は掻取り器、７は高濃度油槽、９は排水管である。
図示のベルトスキマーでは、ベルト５が廃油３の上層3aと接触するように下側ホィール4bを廃油３内に突入させ、かつ両ホィール4a,4bを時計方向に回転させると、極薄い上層3aの高濃度油3aとともに浮遊固体物質がベルト５に付着して、上側ホィール4aの位置まで移動する。
上側ホィール4aの位置では、掻取り器６を、濾布が回転可能な程度に接触させて、高濃度油を掻取り、高濃度油槽７に一旦貯蔵する。ここで、ベルト５の表面はナイロン繊維をブラシ状に密接して並べ、かつ繊維の方向と掻取り器６の方向を反対方向として、油の捕捉と搾出し効率を高めることが好ましい。
また、上層3a直下の低油分濃度廃油が回収油に混入する場合は、廃油の更なる浮上分離を行い、上部の高濃度油分8aは高カロリーの燃料とし回収し、一方下部の低濃度油分8bは、弁を開放して排水管９からスキミング槽２に繰り返す。また、ベルトスキマー１は供給される廃油の量に見合った速度で連続運転される。
FIG. 1 shows an embodiment of a belt skimmer device used in the present invention, in which 1 is a belt skimmer, 2 is a skimming tank, 3 is waste oil, 4 is a wheel, 5 is a belt, and 6 is scraping. 7 is a high concentration oil tank, and 9 is a drain pipe.
In the illustrated belt skimmer, when the lower wheel 4b is plunged into the waste oil 3 so that the belt 5 contacts the upper layer 3a of the waste oil 3, and both the wheels 4a and 4b are rotated clockwise, the ultrathin upper layer 3a The suspended solid substance adheres to the belt 5 together with the high-concentration oil 3a and moves to the position of the upper wheel 4a.
At the position of the upper wheel 4a, the scraper 6 is brought into contact with the filter cloth so that the filter cloth can be rotated, and the high-concentration oil is scraped and temporarily stored in the high-concentration oil tank 7. Here, the surface of the belt 5 is preferably arranged such that nylon fibers are closely arranged in a brush shape, and the direction of the fibers and the direction of the scraper 6 are opposite directions to increase the oil capture and extraction efficiency.
In addition, if the low oil concentration waste oil directly below the upper layer 3a is mixed with the recovered oil, the waste oil is further floated and separated, and the upper high concentration oil 8a is recovered as high-calorie fuel, while the lower low concentration oil 8b is recovered. Open the valve and repeat from the drain pipe 9 to the skimming tank 2. The belt skimmer 1 is continuously operated at a speed corresponding to the amount of waste oil supplied.
スキミング槽２内の上層3aより下層3bは油分濃度が1質量％未満であり、微細な油滴が分散している。 この下層3bには、ベルトスキミングを行う槽とは別の槽でエアー攪拌を行うことにより、油分濃度を廃油の深さに対して一定にする。
また、上記エアー攪拌により、下層の廃油中の油分濃度は大幅に均一化されるため、後続処理における凝集剤添加量も少なくすることができる。エアー攪拌器は適当な函体、管体などから空気を噴出す構造のものであり、攪拌のための回転部分がないためにメンテナンスフリーを期待することができる。なお、空気の流量は毎分当たり処理廃油の体積に対して0.005〜0.03が好ましく、0.005から0.015が最も好ましい。
The lower layer 3b than the upper layer 3a in the skimming tank 2 has an oil concentration of less than 1% by mass, and fine oil droplets are dispersed. In this lower layer 3b, the oil concentration is made constant with respect to the depth of the waste oil by performing air agitation in a tank different from the tank for performing belt skimming.
Moreover, since the oil concentration in the lower layer waste oil is greatly uniformed by the air agitation, the amount of flocculant added in the subsequent processing can be reduced. The air stirrer has a structure in which air is ejected from an appropriate box or tube, and since there is no rotating part for stirring, maintenance-free operation can be expected. The air flow rate is preferably 0.005 to 0.03, most preferably 0.005 to 0.015 with respect to the volume of the treated waste oil per minute.
続いて、上記処理を行った廃油を槽からポンプなどにより汲出し、凝集処理を行う。
凝集剤としては、PAC（poly aluminium chloride）を使用することができる。PACは[Al2(OH)nCl6-n]mの化学式で表わされる無機系凝集剤である。また、ポリアクリルアミド系（アニオン系高分子凝集剤）も有機高分子凝集剤として使用することができる。
Subsequently, the waste oil subjected to the above treatment is pumped out of the tank by a pump or the like, and agglomeration treatment is performed.
As the flocculant, PAC (polyaluminum chloride) can be used. PAC is an inorganic flocculant represented by the chemical formula [Al 2 (OH) n Cl 6-n ] m . Polyacrylamide (anionic polymer flocculants) can also be used as organic polymer flocculants.
以上説明した本発明法によると、廃油は高油分濃度・高カロリーの極薄い表面層と、ほとんどが水分であるそれ以外の大部分に浮上・沈降分離する性質を利用し、高油分濃度の表面層はベルトスキマ−により回収して燃料として回収するとともに、それ以外の下層は、浮上分離は有効ではないので採用せずに、エアー攪拌により油分濃度を均一化することにより、その後凝集―加圧浮上分離処理することが可能になった。
以下、本発明法を実施する処理システムの一実施例を、図２を参照して説明する。
According to the above-described method of the present invention, the waste oil has a high oil concentration and high calorie surface layer and a surface with a high oil concentration by utilizing the property of being floated and settled in the majority of the other parts that are mostly water. The layer is recovered by a belt skimmer and recovered as fuel, and the other lower layers are not used because flotation separation is not effective. Floating separation processing became possible.
An embodiment of a processing system for implementing the method of the present invention will be described below with reference to FIG.
図２は、図１と同じ装置及び器具は同じ参照番号を付した図面である。
図中、１０は受槽、１２はエアー攪拌槽、１３はエアー攪拌器、１４は反応槽、１８は凝集槽、１９は静置槽、２０は加圧浮上分離槽、２５は燃料槽である。
廃油は、受槽１０に一旦溜められ、次にスキミング槽２に移され、ここで高油分濃度の上層3aとほとんどが水分の下層3bに沈降分離される。（２文削除）ベルトスキマー１で回収された高油分濃度の上層3aは配管L２により燃料槽２５に送られ、回収されたが油分濃度が低い部分はラインL３によりスキミング槽２に繰り返される。燃料槽２５からは燃料を回収する。
FIG. 2 is a view in which the same devices and instruments as those in FIG. 1 are denoted by the same reference numerals.
In the figure, 10 is a receiving tank, 12 is an air agitation tank, 13 is an air agitator, 14 is a reaction tank, 18 is a coagulation tank, 19 is a stationary tank, 20 is a pressurized flotation separation tank, and 25 is a fuel tank.
The waste oil is temporarily stored in the receiving tank 10 and then transferred to the skimming tank 2, where the upper layer 3a and most of the high oil concentration are separated into the lower layer 3b of moisture. (Deletion of two sentences) The upper layer 3a of the high oil concentration recovered by the belt skimmer 1 is sent to the fuel tank 25 by the pipe L2, and the portion having the low oil concentration recovered by the line L3 is repeated in the skimming tank 2. Fuel is recovered from the fuel tank 25.
スキミング槽２の下部からは配管L４によりほとんどが水分の沈降廃油（以下「沈降水分」という）をエアー攪拌槽１２に送る。ここでは、配管L５により空気をエアー攪拌器１３に圧送し、気泡として噴出し、沈降水分を攪拌して、油を均一に分布させる。続いて、ポンプを付設した配管L７により沈降水分を反応槽１４に送り、PACをPACタンク１５から添加し、さらにＮａＯＨタンク１６から苛性ソーダ水溶液を添加してpHを約６．５に調整する。かかる1次凝集処理された沈降水分は反応槽１４から溢出て、さらに有機高分子凝集剤をタンク１７から添加して2次凝集を行うと,反応槽１８において残存油分がフロックとして成長する。さらに、静置槽１９でフロックを分散した沈降水分を安定させた後に、配管L８により加圧浮上分離装置２０に送る。 From the lower part of the skimming tank 2, most of the settled waste oil (hereinafter referred to as “settling moisture”) is sent to the air agitation tank 12 through the pipe L 4. Here, air is pumped to the air stirrer 13 through the pipe L5, ejected as bubbles, and the precipitated water is stirred to uniformly distribute the oil. Subsequently, precipitated water is sent to the reaction tank 14 through a pipe L7 provided with a pump, PAC is added from the PAC tank 15, and an aqueous caustic soda solution is further added from the NaOH tank 16 to adjust the pH to about 6.5. The precipitated water subjected to the primary flocculation process overflows from the reaction tank 14, and when an organic polymer flocculant is added from the tank 17 to perform secondary flocculation, the residual oil in the reaction tank 18 grows as a floc. Furthermore, after stabilizing the settled water which disperse | distributed the floc in the stationary tank 19, it sends to the pressurization floating separator 20 by the piping L8.
加圧浮上分離装置２０は、図示されない加圧ポンプ及び加圧タンクを付設しており、これらの機器により加圧された水が供給される。同装置ではほとんどのフロックがスカムとして浮上するので、これを抜取り配管L９により燃料槽２５に送る。一方、浮上しない残存水はｓｓ濃度計２２によりｓｓ濃度を測定し、測定値により油分濃度低減程度を評価する。目標値は３０ｐｐｍ未満である。処理水のほとんどは、配管L1０により工場外に排出し、一部は配管L1１によりエアー攪拌槽１３における油分濃度調整などに使用する。即ち、沈降水分の油分濃度は1質量％以下で低く安定しているが、水量が少ないために、均一攪拌ができないこともあるので、そのような場合は水を補給する。 The pressurized floating separator 20 is provided with a pressurized pump and a pressurized tank (not shown), and is supplied with water pressurized by these devices. In the apparatus, most of the flocks float as scum, and this is sent to the fuel tank 25 through the extraction pipe L9. On the other hand, the residual water that does not float is measured for the ss concentration by the ss concentration meter 22, and the degree of oil concentration reduction is evaluated by the measured value. The target value is less than 30 ppm. Most of the treated water is discharged outside the factory through the pipe L10, and part of it is used for adjusting the oil concentration in the air agitation tank 13 through the pipe L11. That is, although the oil concentration of the settled water is 1% by mass or less and stable, the amount of water is so small that uniform stirring may not be possible. In such a case, water is replenished.
従来行っていた廃油全体をそのまま焼却する方法と比較すると、本発明法は次のような利点を有する。
（１）燃焼する廃油のカロリーが極めて高い。
（２）ベルトスキミング、エアー攪拌などの本発明による湿式処理コストを、従
来の廃油をそのまま燃焼する方法とのコスト比較をする。即ち、従来法では補助燃料などが必要となり、またバーナーの不調などで燃焼が円滑に進まないなどの操業トラブルも起こる。一方、本発明の湿式処理は処理自体が安定しており、トラブルなく連続運転が可能であり、またベルトの布などの消耗品や、エアー攪拌の電力などのコストは低いから、本発明法は有利である。
Compared with the conventional method of incinerating the whole waste oil as it is, the method of the present invention has the following advantages.
(1) The calories of the waste oil to burn are extremely high.
(2) Wet treatment costs according to the present invention, such as belt skimming and air agitation, are compared with conventional methods for burning waste oil as it is. That is, in the conventional method, auxiliary fuel is required, and operational troubles such as combustion not progressing smoothly due to a malfunction of the burner also occur. On the other hand, the wet process of the present invention is stable in itself, can be operated continuously without trouble, and has low costs such as consumables such as belt cloth and power for air agitation. It is advantageous.
１―ベルトスキマー
２―スキミング槽
３−廃油
５―ベルト
６―掻取り器
７−高濃度油槽
１０―受槽
１２―エアー攪拌槽
１４―反応槽
１８―凝集槽
１９―静置槽
２０―加圧浮上分離槽
1-Belt skimmer 2-Skimming tank 3-Waste oil 5-Belt 6-Scraper 7-High concentration oil tank 10-Receiving tank 12-Air agitation tank 14-Reaction tank 18-Coagulation tank 19-Standing tank 20-Pressure float Separation tank
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| Application Number | Priority Date | Filing Date | Title |
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| JP2005250731A JP5000869B2 (en) | 2005-08-31 | 2005-08-31 | Waste oil treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107603746A (en) * | 2017-11-01 | 2018-01-19 | 叶利萍 | A kind of waste grease device |
| CN107619717A (en) * | 2017-10-16 | 2018-01-23 | 罗志江 | A kind of waste grease equipment |
| CN107723097A (en) * | 2017-10-25 | 2018-02-23 | 柴建华 | A kind of waste grease device |
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| JP5047851B2 (en) * | 2008-03-19 | 2012-10-10 | テラル株式会社 | Floating contaminant collection device |
| CN106277614B (en) * | 2016-08-30 | 2019-05-10 | 河南油田工程咨询股份有限公司 | A kind of processing method of reuse condensed oil sewage |
| CN107653963B (en) * | 2017-10-16 | 2018-12-21 | 玉环市万进新能源科技有限公司 | A kind of waste grease device |
| CN107523422B (en) * | 2017-10-16 | 2018-11-02 | 浙江大学台州研究院 | A kind of waste grease device |
| CN107739658B (en) * | 2017-10-23 | 2018-12-14 | 新昌县恒腾科技有限公司 | A kind of waste grease device |
| KR102390495B1 (en) * | 2021-07-16 | 2022-04-22 | 이문성 | Water treatment system using bubble oil skimmer |
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| BE792432A (en) * | 1971-12-10 | 1973-03-30 | Mitsubishi Heavy Ind Ltd | APPARATUS FOR THE TREATMENT OF WASTE LIQUIDS |
| JPS516358A (en) * | 1974-07-04 | 1976-01-19 | Hitachi Construction Machinery | GANYUHAISUISHORIHOHOOYOBI SOCHI |
| JPS60166079A (en) * | 1984-02-04 | 1985-08-29 | Marushima Suimon Seisakusho:Kk | Treating system of waste water from car washing |
| JPH04271888A (en) * | 1991-02-28 | 1992-09-28 | Tonen Corp | Waste water treatment |
| JP4606574B2 (en) * | 2000-12-22 | 2011-01-05 | 株式会社 大都技研 | Oil and fat recovery device with dishwasher |
| JP3640070B2 (en) * | 2001-10-22 | 2005-04-20 | 日本クリーンオイル株式会社 | Oil / water separation and removal equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107619717A (en) * | 2017-10-16 | 2018-01-23 | 罗志江 | A kind of waste grease equipment |
| CN107723097A (en) * | 2017-10-25 | 2018-02-23 | 柴建华 | A kind of waste grease device |
| CN107723097B (en) * | 2017-10-25 | 2018-12-21 | 玉环市万进新能源科技有限公司 | A kind of waste grease device |
| CN107603746A (en) * | 2017-11-01 | 2018-01-19 | 叶利萍 | A kind of waste grease device |
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