JP5183597B2 - Oil-containing wastewater treatment method and treatment equipment - Google Patents

Oil-containing wastewater treatment method and treatment equipment Download PDF

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JP5183597B2
JP5183597B2 JP2009197500A JP2009197500A JP5183597B2 JP 5183597 B2 JP5183597 B2 JP 5183597B2 JP 2009197500 A JP2009197500 A JP 2009197500A JP 2009197500 A JP2009197500 A JP 2009197500A JP 5183597 B2 JP5183597 B2 JP 5183597B2
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oil
scum
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秀美 渡辺
直行 野呂
直哉 高橋
武康 平田
英次郎 酒井
晃久 木村
尚 吉村
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Nippon Steel Corp
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本発明は、含油排水の処理方法及び処理装置に関するものであり、製鉄工場、特に冷間圧延工程から発生する圧延油を含有する排水の処理に適した含油排水の処理方法及び処理装置に関するものである。   TECHNICAL FIELD The present invention relates to an oil-containing wastewater treatment method and treatment apparatus, and more particularly to an oil-containing wastewater treatment method and treatment apparatus suitable for the treatment of wastewater containing rolling oil generated from a cold rolling process. is there.

製鉄工場の冷間圧延工程からは、圧延油を多量に含有する含油排水が排出される。この圧延油としては例えば、植物性油のパーム油や鉱物性油を混合した油が用いられている。またこの含油排水中には、鉄粉が混入している。   Oil-containing wastewater containing a large amount of rolling oil is discharged from the cold rolling process of the steel factory. As the rolling oil, for example, oil obtained by mixing vegetable oil palm oil or mineral oil is used. In addition, iron powder is mixed in the oil-containing waste water.

このような含油排水の処理方法として、特許文献1には、含油排水にカチオン系高分子凝集剤を添加して油分を凝集させて含油スカムとし、この含油スカムを撹拌タンク内で撹拌して泥状化し、油分を回収する方法が開示されている。しかしこの方法は薬剤コストが多大となるうえに、回収された油分の発熱量が低くかつ不安定であるから、回収油を燃料として再使用することは困難である。   As a treatment method for such oil-containing wastewater, Patent Document 1 discloses that a cationic polymer flocculant is added to oil-containing wastewater to agglomerate oil to form oil-containing scum, and the oil-containing scum is stirred in a stirring tank to remove mud. And a method for recovering oil is disclosed. However, this method increases the cost of the drug, and the heat value of the recovered oil is low and unstable. Therefore, it is difficult to reuse the recovered oil as fuel.

また特許文献2には、含油排水に活性炭と無機凝集剤とを添加して油分をCOD等とともに沈降分離させる方法が開示されている。しかしこの方法も薬剤コストが多大となるうえに、回収された油分を燃料として再使用することは困難である。   Patent Document 2 discloses a method in which activated carbon and an inorganic flocculant are added to oil-containing wastewater and the oil is precipitated and separated together with COD and the like. However, this method also increases the chemical cost, and it is difficult to reuse the recovered oil as fuel.

このほか、含油排水から自然浮上により分離させた含油スカムを蒸気式間接乾燥機で粘性を確保できる範囲まで乾燥したうえ、ロータリーキルンを用いて焼却処理する焼却方法も実施されている。しかし、蒸気式乾燥機は植物性油等との混合廃油の場合等では、含油スカムの水分を75%程度にしか落せないため、ロータリーキルンでは含油スカム中の水分を蒸発させるために、多くの補助燃料が必要である。また水蒸気によってガスボリュームが増加するため、排ガス処理設備が大型化する等の問題がある。   In addition, an incineration method in which oil-containing scum separated from oil-containing wastewater by natural flotation is dried to the extent that viscosity can be secured with a steam indirect dryer and incinerated using a rotary kiln is also being carried out. However, since steam dryers can reduce the moisture content of oil-bearing scum to about 75% in the case of waste oil mixed with vegetable oil, etc., rotary kilns use a lot of subsidies to evaporate moisture in oil-bearing scum. Fuel is needed. Moreover, since the gas volume is increased by water vapor, there is a problem that the exhaust gas treatment facility is enlarged.

さらにこのほか、遠心脱水機によって含油スカムの水分を低下させる方法も考えられるが、遠心脱水は設備コスト及び運転コストが高くつくため、実用性に乏しい。   In addition to this, a method of reducing the water content of the oil-containing scum by using a centrifugal dehydrator is also conceivable, but centrifugal dehydration is expensive due to high equipment cost and operation cost.

特許第4246087号公報Japanese Patent No. 4246087 特許第4169614号公報Japanese Patent No. 4169614

従って本発明の目的は上記した従来の問題点を解決し、含油排水を多くの薬剤や熱エネルギーを要することなく低コストで処理し、燃料油を取り出すことができる含油排水の処理方法及び処理装置を提供することである。   Therefore, the object of the present invention is to solve the above-mentioned conventional problems, and to treat the oil-containing wastewater at low cost without requiring a large amount of chemicals and thermal energy, and to treat the oil-containing wastewater and take out the fuel oil. Is to provide.

上記の課題を解決するためになされた本発明の含油排水の処理方法は、含油排水を浮上分離池に導いて浮上性の含油スカムと沈降性の含油スラッジとに分離し、含油スカムは振動篩により水分を分離して脱水スカムとしたうえ、含油スラッジとともに混合溶解槽に投入し熱量調整油と混合して熱量調整を行い、その後に円筒状のミル本体の内部に多数の振動するロッドを備えた構造の振動ミルに通して粒子の微細化と粘性調整とを行い、燃料油を得ることを特徴とするものである。 An oil-containing wastewater treatment method according to the present invention made to solve the above-mentioned problems is directed to separating the oil-containing wastewater into a floating oil-containing scum and a sedimentary oil-containing sludge by guiding the oil-containing wastewater to a floating separation pond. In addition to separating water into dehydrated scum, it is put into a mixing and dissolving tank together with oil-containing sludge, mixed with heat adjustment oil to adjust heat quantity, and then equipped with a number of vibrating rods inside the cylindrical mill body The fuel oil is obtained by making the particles finer and adjusting the viscosity by passing through a vibration mill having a different structure .

なお請求項2のように、含油排水が製鉄工場の冷間圧延工程から発生する圧延油を含有する排水とすることができる。また請求項3のように、浮上分離を自然浮上と加圧浮上との2段階で行うことが好ましい。また請求項4のように、振動篩により分離された水分を浮上分離池に返送することが好ましい。   Note that, as in claim 2, the oil-containing wastewater can be wastewater containing rolling oil generated from a cold rolling process in a steel factory. Further, as in claim 3, it is preferable to perform the floating separation in two stages of natural floating and pressurized floating. Moreover, it is preferable to return the water | moisture content isolate | separated by the vibrating sieve to a floating separation pond like Claim 4.

また本発明の含油排水の処理装置は、含油排水を含油スカムと含油スラッジとに分離する浮上分離池と、分離された含油スカムから水分を分離して脱水スカムとする振動篩と、この脱水スカムと前記含油スラッジとを熱量調整油と混合して熱量調整する混合溶解槽と、この混合溶解槽から取り出された混合溶解液中の粒子を微細化し燃料油とする振動ミルとを備え、この振動ミルが円筒状のミル本体の内部に多数の振動するロッドを備えた構造のものであることを特徴とするものである。 The oil-containing wastewater treatment apparatus of the present invention includes a floating separation pond that separates oil-containing wastewater into oil-containing scum and oil-containing sludge, a vibrating sieve that separates moisture from the separated oil-containing scum, and uses the dehydrated scum. provided with a mixing and dissolving tank for heat adjusted by mixing the oil-containing sludge and heat adjustment oil, and a vibration mill to particles of mixed lysates taken from the mixed melting tank with micronized fuel oil, the vibration The mill has a structure having a large number of vibrating rods inside a cylindrical mill body .

なお請求項6のように、浮上分離池が自然浮上池と加圧浮上池とからなることが好ましく、また請求項7のように、振動篩が目開きの大きい前段の振動篩と、目開きの小さい後段の振動篩とを組み合わせたものであることが好ましい。 In addition, it is preferable that the floating separation pond is composed of a natural levitation pond and a pressurized levitation pond as in claim 6, and the vibration sieve in the previous stage having a large opening and a mesh opening as in claim 7 It is preferable to use a combination with a subsequent vibration sieve having a small size .

本発明によれば、含油排水を含油スカムと沈降性の含油スラッジとに分離し、浮上した含油スカムの水分を振動篩によって、熱エネルギーを用いずに分離することができる。しかも分離された油分は、熱量調整油の添加と振動ミルによる粒子の微細化とによって燃料油として再使用することが可能となる。このため従来法に比較して低コストで、含油排水の処理が可能となる。特に本発明では円筒状のミル本体の内部に多数の振動するロッドを備えた構造の振動ミルを用いたことにより、混合溶解液はミル本体の内部を流れる間に振動するロッドの間で衝撃力を受け、固形物や粒子が効率よく微粉砕される。 According to the present invention, oil-containing wastewater can be separated into oil-containing scum and sedimentary oil-containing sludge, and the moisture of the oil-containing scum that has floated can be separated by a vibrating sieve without using heat energy. Moreover, the separated oil can be reused as fuel oil by the addition of the calorific value adjusting oil and the refinement of the particles by the vibration mill. For this reason, it is possible to treat oil-containing wastewater at a lower cost than the conventional method. In particular, in the present invention, by using a vibration mill having a structure in which a large number of vibrating rods are provided inside a cylindrical mill body, the mixed solution has an impact force between the vibrating rods while flowing inside the mill body. The solids and particles are efficiently pulverized.

本発明の実施形態を示すフロー図である。It is a flowchart which shows embodiment of this invention. 振動篩の説明図である。It is explanatory drawing of a vibration sieve. 振動ミルの正面図である。It is a front view of a vibration mill. 振動ミルの平面図である。It is a top view of a vibration mill. 振動ミルの断面図である。It is sectional drawing of a vibration mill.

以下に本発明の好ましい実施形態を説明する。
図1に示すように、含油排水は先ず自然浮上池1と加圧浮上池2とからなる浮上分離池3に導かれる。含油排水はこの実施形態では製鉄工場の冷間圧延工程から発生する圧延油を含有する含油排水であるが、必ずしもこれに限定されるものではない。前述のとおり、圧延油はパーム油と呼ばれる植物性油に鉱物性油を混合した油である。
Hereinafter, preferred embodiments of the present invention will be described.
As shown in FIG. 1, the oil-containing wastewater is first guided to a floating separation pond 3 composed of a natural floating pond 1 and a pressurized floating pond 2. In this embodiment, the oil-containing wastewater is oil-containing wastewater containing rolling oil generated from the cold rolling process of the steel mill, but is not necessarily limited thereto. As described above, the rolling oil is an oil obtained by mixing a mineral oil with a vegetable oil called palm oil.

自然浮上池1では、含油排水中の油分は比重差によって水面に浮上分離する。また加圧浮上池2では、底部から供給される空気気泡の浮上力を利用して油分の浮上分離が促進される。すなわち、浮上する気泡に付着あるいは随伴して微細な油滴が水面に浮上する。これらの浮上分離池3において含油排水は、浮上性の含油スカムと、沈降性の含油スラッジと、水とに分離される。この実施形態では、自然浮上池1で浮上分離された含油スカムは油分が多いので水切りタンク4に直接取り出され、ここで水分を分離したうえで油タンク5に送られているが、加圧浮上池2で浮上分離された油分の少ない含油スカムと併せて、スカムの受入タンク6に送ることもできる。   In the natural levitation pond 1, the oil content in the oil-containing wastewater floats and separates on the water surface due to the difference in specific gravity. In the pressurized levitation pond 2, the floating separation of the oil is promoted using the levitation force of the air bubbles supplied from the bottom. That is, fine oil droplets float on the surface of the water adhering to or accompanying the rising bubbles. In these floating separation ponds 3, the oil-containing wastewater is separated into a floating oil-containing scum, a sedimentary oil-containing sludge, and water. In this embodiment, since the oil-impregnated scum floated and separated in the natural levitation pond 1 has a large amount of oil, it is directly taken out to the draining tank 4 where the water is separated and sent to the oil tank 5. Along with the oil-impregnated scum that is floated and separated in the pond 2, it can be sent to the scum receiving tank 6.

なお、自然浮上池1の水は比較的多くの油分を含むので加圧浮上池2に送られるが、加圧浮上池2で含油スカムを分離した水は返水管7により自然浮上池1に返送される。また水切りタンク4で分離された水も同様に、返水管8により自然浮上池1に返送される。   Since the water in the natural levitation pond 1 contains a relatively large amount of oil, it is sent to the pressure levitation pond 2. Is done. Similarly, the water separated in the draining tank 4 is returned to the natural floating pond 1 by the return pipe 8.

上記のようにして浮上分離池3で分離された含油スカムは、スカムの受入タンク6に集めてヒーター9で加温したうえで、振動篩10により水分を分離される。含油スカムを加温するのは、振動篩10で油水分離し易い粘度に調整するためであり、この実施形態では30〜50℃程度に加熱すればよい。   The oil-impregnated scum separated in the floating separation pond 3 as described above is collected in the scum receiving tank 6 and heated by the heater 9, and then the water is separated by the vibrating sieve 10. The oil-impregnated scum is heated in order to adjust the viscosity so that oil and water can be easily separated by the vibrating sieve 10, and in this embodiment, it may be heated to about 30 to 50 ° C.

振動篩10は図2に示されるように缶体11の内部に振動する篩板12を設置したものであり、直列に複数段の振動篩10を配置することが好ましい。前段の振動篩10aは目開きが大きく、後段の振動篩10bは目開きが小さくなっている。例えば、前段の振動篩10aの目開きは1.0〜0.6mm、後段の振動篩10bの目開きは0.5〜0.2mmとすればよい。なお図3のように、後段の振動篩10bを2段または3段とすることもできる。含油スカムをこのような振動篩10に掛けると水分が篩板12を通って滴下して分離され、篩板12上から脱水スカムを取り出すことができる。   As shown in FIG. 2, the vibrating sieve 10 is provided with a vibrating sieve plate 12 inside the can body 11, and it is preferable to arrange a plurality of stages of vibrating sieves 10 in series. The first-stage vibrating screen 10a has a large opening, and the second-stage vibrating screen 10b has a small opening. For example, the aperture of the front vibrating screen 10a may be 1.0 to 0.6 mm, and the aperture of the rear vibrating screen 10b may be 0.5 to 0.2 mm. In addition, as shown in FIG. 3, the latter vibration sieve 10b can be two or three stages. When the oil-impregnated scum is applied to such a vibrating sieve 10, moisture is dropped and separated through the sieve plate 12, and the dehydrated scum can be taken out from the sieve plate 12.

この振動篩10による脱水率は約40%に達するが、従来行われていた蒸気式間接乾燥機による脱水率は約20%に過ぎない。また遠心脱水機を用いれば脱水率は40%程度に達するが、設備コスト及び運転コストが高価となる。これに対して複数段の振動篩10を用いれば、設備コスト及び運転コストが安価であり、しかも遠心脱水機と同等の脱水率を達成することができる。このように振動篩10を用いて含油スカムの脱水を行うことは従来に例を見ないと思われる。水分が分離された脱水スカムは受入ピット11に送られる。また分離された水分は返水管13により自然浮上池1に返送される。   Although the dewatering rate by the vibrating sieve 10 reaches about 40%, the dewatering rate by the conventional steam type indirect dryer is only about 20%. If a centrifugal dehydrator is used, the dehydration rate reaches about 40%, but the equipment cost and operation cost become high. On the other hand, if the multistage vibrating sieve 10 is used, the equipment cost and the operation cost are low, and the dehydration rate equivalent to that of the centrifugal dehydrator can be achieved. It seems that there is no example of dehydrating oil-impregnated scum using the vibrating sieve 10 in this way. The dewatered scum from which the water has been separated is sent to the receiving pit 11. The separated water is returned to the natural levitation pond 1 through the return pipe 13.

前記した自然浮上池1及び加圧浮上池2で底部に沈降分離された含油スラッジは、含油スカムに比較して油分が多い。このためそのまま受入ピット11に送られる。このように、受入ピット11には脱水スカムと含油スラッジとが供給される。このほか、回収されたグリス等の高粘性廃油があれば合わせて受入ピット11に供給してもよい。   The oil-containing sludge settled and separated at the bottom in the natural levitation pond 1 and the pressure levitation pond 2 described above has more oil than oil-containing scum. For this reason, it is sent to the receiving pit 11 as it is. In this way, the receiving pit 11 is supplied with dewatered scum and oil-containing sludge. In addition, if there is a highly viscous waste oil such as recovered grease, it may be supplied to the receiving pit 11 together.

前記した油タンク5には水切りタンク4から油分が多い含油スカムが供給されているが、そのほかに熱量調整油が供給される。熱量調整油は発熱量の大きい油であればよいが、例えばB重油を用いることができる。その量は含油排水の性状(成分及び油含有率)によって適宜調整すればよい。この油タンク5の内容物と受入ピット11の内容物とは、混合溶解槽14において攪拌混合される。混合溶解槽14にもヒーターが設けられている。この混合溶解槽14において含油スラッジと脱水スカムは油分が多い含油スカムや熱量調整油と加熱攪拌され、所定の発熱量と所定の粘性とを持つように調整される。   The oil tank 5 is supplied with oil-impregnated scum having a large amount of oil from the draining tank 4, but in addition to that, calorific value adjusting oil is supplied. The calorific value adjustment oil may be any oil with a large calorific value, but for example, B heavy oil can be used. The amount may be appropriately adjusted depending on the properties (components and oil content) of the oil-containing wastewater. The contents of the oil tank 5 and the contents of the receiving pit 11 are agitated and mixed in the mixing dissolution tank 14. The mixing dissolution tank 14 is also provided with a heater. In this mixing and dissolving tank 14, the oil-containing sludge and the dewatered scum are heated and stirred with the oil-containing scum and the calorific value adjusting oil having a large amount of oil, and adjusted so as to have a predetermined heat generation amount and a predetermined viscosity.

その後、この混合溶解槽14から取り出されたスラリー状の混合溶解液を振動篩15に通して異物を除去したうえ、加温タンク16で30〜60℃に加温し、振動ミル17に送る。なお振動篩15は本発明においては必須のものではない。   Thereafter, the slurry-like mixed solution taken out from the mixed dissolution tank 14 is passed through the vibration sieve 15 to remove foreign matters, heated to 30 to 60 ° C. in the heating tank 16, and sent to the vibration mill 17. The vibrating sieve 15 is not essential in the present invention.

振動ミル17は振動するロッドによってスラッジ中の固形物や粒子を微粉砕する設備である。その一例は図3〜図5に示すとおりであり、内部に多数のロッド21が収納された円筒状のミル本体20をモータ22によって駆動される振動軸23で振動させている。この実施形態ではミル本体20は上下2段となっており、混合溶解液は上段のミル本体20の前端に位置する投入口24から投入され、後端において下段のミル本体20に流入し、下段のミル本体20の前端に位置する排出口25から排出される。   The vibration mill 17 is a facility for finely pulverizing solids and particles in the sludge with a vibrating rod. An example thereof is as shown in FIGS. 3 to 5, and a cylindrical mill body 20 in which a large number of rods 21 are housed is vibrated by a vibration shaft 23 driven by a motor 22. In this embodiment, the mill body 20 has two upper and lower stages, and the mixed solution is introduced from the inlet 24 located at the front end of the upper mill body 20, and flows into the lower mill body 20 at the rear end. It is discharged from a discharge port 25 located at the front end of the mill main body 20.

なおこれらの上下2段のミル本体20はスプリング26によって支持されたサポートフレーム27に前後2箇所を支持されている。そしてその両側に配置された2本の振動軸23の軸受部28をこれらのサポートフレーム27に接触させることによって、ミル本体20を激しく振動させる構造である。その振幅は例えば8mm、振動数は毎分1200回である。ロッド21は鋼鉄製であって直径が25mm、長さ3mのサイズのものが数百本収納されており、混合溶解液はミル本体20の内部を流れる間に振動するロッド21の間で衝撃力を受け、固形物や粒子が微粉砕される。   The upper and lower two-stage mill main body 20 is supported at two places on the front and rear by a support frame 27 supported by a spring 26. Then, the mill main body 20 is vibrated vigorously by bringing the bearing portions 28 of the two vibration shafts 23 disposed on both sides thereof into contact with the support frames 27. The amplitude is 8 mm, for example, and the frequency is 1200 times per minute. The rod 21 is made of steel and contains hundreds of rods having a diameter of 25 mm and a length of 3 m, and the mixed solution has an impact force between the rods 21 that vibrate while flowing inside the mill body 20. The solids and particles are pulverized.

このような微粉砕が進行するとともに混合溶解液の粘度も低下して行くので、30〜60℃における粘度が20〜1000mm/sの範囲に収まるように振動ミル5の運転を行うことが好ましい。なお粘度を20〜1000mm/sの範囲とするのは、これよりも粘度を低下させることは容易ではなくコスト高となり、逆に粘度が1000mm/sを超えると燃料として利用しにくくなるためである。より好ましくは20〜100mm/sの範囲にすることが好ましい。 Since such fine pulverization proceeds and the viscosity of the mixed solution also decreases, it is preferable to operate the vibration mill 5 so that the viscosity at 30 to 60 ° C. falls within the range of 20 to 1000 mm 2 / s. . Note in the range of viscosity of 20~1000mm 2 / s, this becomes costly and not easy to reduce the viscosity than the viscosity conversely becomes difficult to use as a fuel exceeds 1000 mm 2 / s It is. More preferably, it is preferable to set it as the range of 20-100 mm < 2 > / s.

振動ミル17を通過させることにより混合溶解液は適度の粘度を持つ燃料油となる。得られた燃料油はそのまま、あるいは必要に応じてさらに熱量調整油を添加し、重油の代替燃料として外販したり、あるいは廃棄物焼却用ロータリーキルンの補助燃料油として使用したりすることができる。   By passing through the vibration mill 17, the mixed solution becomes a fuel oil having an appropriate viscosity. The obtained fuel oil can be used as it is, or can be further added with a calorific value adjusting oil as needed, and sold as an alternative fuel for heavy oil, or used as an auxiliary fuel oil for a rotary kiln for waste incineration.

以上に説明したように、本発明によれば、含油排水を多くの薬剤や熱エネルギーを要することなく低コストで処理し、燃料油を取り出すことができる。   As described above, according to the present invention, oil-containing wastewater can be processed at low cost without requiring a large amount of chemicals and thermal energy, and fuel oil can be taken out.

製鉄工場の冷間圧延工程から発生する圧延油を含有する含油排水を、図1に示した設備により処理した。浮上分離池で分離された含油スカムは、70〜90%の水分と5〜10%の油分を含有していた。また含油スラッジは35%の油分を含有し、その低位発熱量は4000kcal/kgであった。この含油スカムを図2に示した3段の振動篩で脱水したところ、その水分は40%にまで低下して脱水スカムとなった。なお、1段目の振動篩の目開きは0.8mm、2段目と3段目の振動篩の目開きは0.3mmとした。これらの含油スラッジと脱水スカムとを熱量調整油としてのB重油または高カロリー廃油(例えば油圧作動油廃油)とともに混合溶解槽において加熱攪拌し、さらに図3〜図5に示す振動ミルに通して燃料油を得た。この燃料油を廃棄物焼却用のロータリーキルンの補助燃料として使用した。   The oil-containing wastewater containing the rolling oil generated from the cold rolling process of the steel factory was treated with the equipment shown in FIG. The oil-containing scum separated in the floating separation pond contained 70 to 90% moisture and 5 to 10% oil. The oil-containing sludge contained 35% oil, and its lower heating value was 4000 kcal / kg. When this oil-impregnated scum was dehydrated with the three-stage vibrating screen shown in FIG. 2, the water content was reduced to 40% and became dehydrated scum. Note that the opening of the first stage vibrating screen was 0.8 mm, and the opening of the second and third stage vibrating screens was 0.3 mm. These oil-impregnated sludge and dewatered scum are mixed with B heavy oil or high-calorie waste oil (for example, hydraulic oil waste oil) as a calorie adjusting oil in a mixing and dissolving tank, and further passed through a vibration mill shown in FIGS. Got oil. This fuel oil was used as an auxiliary fuel for a rotary kiln for waste incineration.

本発明によれば、含油排水由来の廃棄物の焼却処理量を、従来に比較して95%も減少させることができた。また廃棄物焼却用のロータリーキルンの補助燃料使用量を、従来に比較して約40%減少させることができた。また補助燃料として本発明によって得られた燃料油を追加投入した場合には、ロータリーキルンの焼却能力を従来よりも約2倍に増加させることができた。   According to the present invention, the incineration amount of waste derived from oil-containing wastewater can be reduced by 95% compared to the conventional case. In addition, the amount of auxiliary fuel used in the rotary kiln for waste incineration was reduced by about 40% compared to the prior art. In addition, when the fuel oil obtained by the present invention was added as an auxiliary fuel, the incineration capacity of the rotary kiln could be increased by a factor of about 2.

1 自然浮上池
2 加圧浮上池
3 浮上分離池
4 水切りタンク
5 油タンク
6 スカムの受入タンク
7 返水管
8 返水管
9 ヒーター
10 振動篩
10a 前段の振動篩
10b 後段の振動篩
11 缶体
12 篩板
13 返水管
14 混合溶解槽
15 振動篩
16 加温タンク
17 振動ミル
20 ミル本体
21 ロッド
22 モータ
23 振動軸
24 投入口
25 排出口
26 スプリング
27 サポートフレーム
28 軸受部
DESCRIPTION OF SYMBOLS 1 Natural floating pond 2 Pressurized floating pond 3 Floating separation pond 4 Drain tank 5 Oil tank 6 Scum receiving tank 7 Return pipe 8 Return pipe 9 Heater 10 Vibrating sieve 10a Vibrating sieve 10b of the previous stage 11 Vibrating sieve 11 Can body 12 Sieve Plate 13 Water return pipe 14 Mixing dissolution tank 15 Vibrating sieve 16 Heating tank 17 Vibrating mill 20 Mill body 21 Rod 22 Motor 23 Vibrating shaft 24 Input port 25 Outlet port 26 Spring 27 Support frame 28 Bearing part

Claims (7)

含油排水を浮上分離池に導いて浮上性の含油スカムと沈降性の含油スラッジとに分離し、含油スカムは振動篩により水分を分離して脱水スカムとしたうえ、含油スラッジとともに混合溶解槽に投入し熱量調整油と混合して熱量調整を行い、その後に円筒状のミル本体の内部に多数の振動するロッドを備えた構造の振動ミルに通して粒子の微細化と粘性調整とを行い、燃料油を得ることを特徴とする含油排水の処理方法。 Oil-containing wastewater is led to a floating separation pond and separated into floating oil-impregnated scum and sedimentary oil-containing sludge. The oil-impregnated scum separates moisture with a vibrating sieve to form dehydrated scum, and is added to the mixing and dissolution tank together with the oil-containing sludge. After mixing with calorific value adjustment oil, the calorific value is adjusted, and then the particle is refined and the viscosity is adjusted by passing it through a vibration mill having a structure with many vibrating rods inside the cylindrical mill body. An oil-containing wastewater treatment method characterized by obtaining oil. 含油排水が製鉄工場の冷間圧延工程から発生する圧延油を含有する排水であることを特徴とする請求項1記載の含油排水の処理方法。   The method for treating oil-containing wastewater according to claim 1, wherein the oil-containing wastewater is wastewater containing rolling oil generated from a cold rolling process of a steel factory. 浮上分離を自然浮上と加圧浮上との2段階で行うことを特徴とする請求項1記載の含油排水の処理方法。   The method for treating oil-containing wastewater according to claim 1, wherein the flotation separation is performed in two stages of natural flotation and pressurized flotation. 振動篩により分離された水分を浮上分離池に返送することを特徴とする請求項1記載の含油排水の処理方法。   The method for treating oil-containing wastewater according to claim 1, wherein the water separated by the vibrating sieve is returned to the floating separation pond. 含油排水を含油スカムと含油スラッジとに分離する浮上分離池と、分離された含油スカムから水分を分離して脱水スカムとする振動篩と、この脱水スカムと前記含油スラッジとを熱量調整油と混合して熱量調整する混合溶解槽と、この混合溶解槽から取り出された混合溶解液中の粒子を微細化し燃料油とする振動ミルとを備え、この振動ミルが円筒状のミル本体の内部に多数の振動するロッドを備えた構造のものであることを特徴とする含油排水の処理装置。 A floating separation pond that separates oil-containing wastewater into oil-containing scum and oil-containing sludge, a vibrating sieve that separates moisture from the separated oil-containing scum into dewatered scum, and the dewatered scum and the oil-containing sludge are mixed with calorific value adjusting oil. a mixing dissolver to heat adjusted, the particles of the mixture lysates taken from the mixed melting tank and a vibration mill to fine and fuel oil, a number vibration mill inside a cylindrical mill body An oil-containing wastewater treatment apparatus characterized by having a structure comprising a vibrating rod . 浮上分離池が自然浮上池と加圧浮上池とからなることを特徴とする請求項5記載の含油排水の処理装置。   6. The apparatus for treating oil-containing wastewater according to claim 5, wherein the levitation separation pond comprises a natural levitation pond and a pressurized levitation pond. 振動篩が、目開きの大きい前段の振動篩と、目開きの小さい後段の振動篩とを組み合わせたものであることを特徴とする請求項5記載の含油排水の処理装置。   6. The apparatus for treating oil-containing wastewater according to claim 5, wherein the vibration sieve is a combination of a front-stage vibration sieve having a large mesh opening and a rear-stage vibration sieve having a small mesh opening.
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CN104671622A (en) * 2015-02-02 2015-06-03 杰瑞石油天然气工程有限公司 System for treating solid pollutant containing C30<+> and system and method for treating oily sludge

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JPS5298705A (en) * 1976-02-17 1977-08-18 Kawasaki Steel Co Method and apparatus for recovering rolling oil
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CN104671622A (en) * 2015-02-02 2015-06-03 杰瑞石油天然气工程有限公司 System for treating solid pollutant containing C30<+> and system and method for treating oily sludge
CN104671622B (en) * 2015-02-02 2017-03-15 杰瑞石油天然气工程有限公司 Contain C30+The processing system of solid pollutant, the processing system of oily sludge and method

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