JP2012122001A - Device for removing aromatic phosphate ester in waste oil, and treatment system for waste oil containing pcb - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for removing an aromatic phosphate ester in waste oil, and a treating system for the waste oil containing a polychlorinated biphenyl (PCB).SOLUTION: This device for removing an aromatic phosphate ester in waste oil includes a keeping tank 11 for keeping the waste oil 13 containing the aromatic phosphate ester 12, a supplying tank 14 for supplying the predetermined amount of the waste oil 13 containing the aromatic phosphate ester 12, and sent by a line Lfrom the keeping tank 11, a reacting means 20 for bringing the waste oil 13 sent by a line Lfrom the supplying tank 14 in contact with an inorganic phosphoric acid compound 51 filled in its inside to proceed an inorganizing reaction, a heating part 21 for heating the reacting means 20 to a prescribed temperature, an analyzing part 22 for analyzing the phosphorus concentration (P) in reacted oil 19, a circulating line Lfor returning the reacted oil 19 to the supplying tank 14, a filter 26 for removing a solid part in the reacted oil 19 based on the results of the analyzing part 22, and a storage tank 28 for storing the treated waste oil 27 after passing through the filter 26 and having been subjected to the removal treatment of the aromatic phosphate ester 12.

Description

  The present invention relates to an apparatus for removing aromatic phosphate esters in waste oil and a treatment system for waste oil containing polychlorinated biphenyl (PCB).

Conventionally, it is known to add organometallic additives, phosphorus compounds, and the like to lubricating oils in order to improve wear resistance. As an organometallic additive, ZnDTP (zinc-dithiophosphate) effective for preventing wear and preventing oxidation is frequently used. TCP (tricresyl phosphate) and the like are known as typical phosphorus compounds (Patent Document 1). This tricresyl phosphate is adsorbed on the metal surface and decomposes to form a phosphate film to prevent wear.
By the way, after its use, it is stored as waste oil in drums.

  Since this tricresyl phosphate is flame retardant, the lubricating oil containing the tricresyl phosphate may not be combusted and may be stored for a long period of time. If it can be removed efficiently, combustion treatment can be carried out, but an efficient removal method has not yet been established.

  Also, PCBs (polychlorinated biphenyls: a general term for polychlorinated biphenyls: chlorinated isomers of biphenyls), which are used as insulating oils in heat media, are strictly stored, but PCB processing facilities are located in various places. (Japan Environmental Safety Corporation (JESCO) has been established as a PCB treatment facility, and PCBs have been installed in several locations throughout the country under the supervision of the country. A waste treatment facility is installed and a treatment business is carried out (Non-Patent Document 1).

  In recent years, various technologies for processing PCBs used for such insulating oils have been proposed (about the evaluation method and the evaluated technology of PCB processing technology in the Industrial Waste Treatment Business Promotion Foundation: Non Patent Document 2).

  The present applicant has previously proposed a hydrothermal oxidative decomposition apparatus as a PCB processing technique, and performs PCB processing for detoxification (Patent Document 2 or 3).

Japanese Patent Laid-Open No. 9-157681 JP-A-9-79531 JP 2003-285041 A

http://www.jesconet.co.jp/business/contents/characteristics/index.html http://www.jesconet.co.jp/business/pcb_technology/pdf/PCB_shori.pdf

  By the way, when the lubricating oil and the insulating oil as described above are mixed and stored as waste oil, the aromatic phosphate ester has flame retardancy and hygroscopicity. In the dechlorination / decomposition treatment method using Na, although PCB can be detoxified with PCB alone, there is a problem that it is not possible to treat PCB waste oil containing aromatic phosphate treatment containing moisture.

In addition, although the PCB can be decomposed in the hydrothermal oxidative decomposition apparatus, when the aromatic phosphate ester is mixed, the apatite (Ca ₅ (PO ₄ ) ₃ (F, Cl, OH) is added during the hydrothermal treatment process. )) Is generated, from the viewpoint of the soundness of the processing equipment, establishment of an efficient method for removing aromatic phosphate ester as a pretreatment is desired.

  In view of the above problems, the present invention provides an aromatic phosphate ester removing device and polychlorinated biphenyl in waste oil capable of removing aromatic phosphate ester in advance when decomposing waste oil with a hydrothermal oxidative decomposition apparatus. It is an object of the present invention to provide a waste oil treatment system containing (PCB).

  A first invention of the present invention for solving the above-mentioned problems is a supply tank that supplies a predetermined amount of waste oil containing an aromatic phosphate, and an inorganic material that is filled with the waste oil fed from the supply tank. A reaction means for bringing the mineralization reaction into contact with the phosphoric acid compound; a heating part for heating the reaction means to a predetermined temperature; an analysis part for analyzing the phosphorus (P) concentration of the reaction oil; and the reaction An apparatus for removing aromatic phosphate esters in waste oil, comprising: a circulation line for returning oil to a supply tank; and a filter for removing solid content in the reaction oil based on the result of the analysis unit.

  A second invention is a supply tank for supplying a predetermined amount of waste oil containing an aromatic phosphate ester, and stirring for mixing water or a phosphoric acid aqueous solution from a water tank or a phosphoric acid aqueous solution tank into the waste oil supplied from the supply tank. A mixing tank provided with a means, a reaction tank in which the waste oil mixed with water and the inorganic phosphate compound are brought into contact with each other to be mineralized, and phosphoric acid is mineralized; heating for heating the reaction tank Part, an analysis part for analyzing the proportion of phosphoric acid or phosphorus in the emulsion, a circulation line for returning the reaction liquid to the mixing tank, the reaction liquid is allowed to stand based on the result of the analysis part, and an oil layer and an aqueous layer A stationary tank that separates into the oil layer, a filter that removes solids in the oil layer, a storage tank that stores treated waste oil from which the aromatic phosphate ester that has passed through the filter has been removed, and phosphoric acid in the water layer Wastewater treatment section to remove Lying in the aromatic phosphoric acid ester removal apparatus in waste oil, characterized in that comprises.

  A third invention is the waste oil according to the first or second invention, wherein the inorganic phosphate compound is any one of zinc phosphate, iron phosphate, sodium hydrogen phosphate and sodium phosphate. In the apparatus for removing aromatic phosphates.

  According to a fourth invention, there is provided the apparatus for removing aromatic phosphate esters in waste oil according to the second or third invention, wherein the amount of water or phosphoric acid aqueous solution added is 10% by weight or less.

  5th invention is the aromatic phosphate ester removal apparatus in waste oil characterized by the heating temperature of the said heating part being 80-100 degreeC in any one invention of 1st thru | or 4. .

  In a sixth aspect of the invention according to any one of the second to fifth aspects of the invention, when the analysis unit analyzes the phosphoric acid concentration in water or the concentration of the aromatic phosphate ester in the oil reaches a predetermined concentration. The apparatus for removing aromatic phosphate ester in waste oil has a determination unit for performing an operation of switching to a stationary tank.

  A seventh invention includes the inorganic filling tank according to any one of the second to sixth inventions, wherein the waste water treatment unit is filled with a solid adsorbent containing at least one of Ca, Mg, Na, and Al. In the apparatus for removing aromatic phosphate ester from waste oil, phosphoric acid is immobilized with a metal salt.

  An eighth invention is the aromatic phosphate ester removing device in waste oil according to any one of the first to seventh inventions, wherein the waste oil contains polychlorinated biphenyl (PCB).

  The ninth invention is an apparatus for removing aromatic phosphate esters in waste oil of the eighth invention, and a hydrothermal oxidative decomposition apparatus for decomposing polychlorinated biphenyl (PCB) in waste oil from which aromatic phosphate esters have been removed. And a waste oil treatment system containing polychlorinated biphenyl (PCB).

ADVANTAGE OF THE INVENTION According to this invention, it can process efficiently by making the aromatic phosphate ester in waste oil contact with an inorganic phosphate compound, and mineralizing phosphoric acid, and subsequent waste oil processing becomes easy.
In addition, when the PCB in the waste oil is decomposed by the hydrothermal oxidative decomposition apparatus, the aromatic phosphate ester is removed in advance, so that the apatite formation of the aromatic phosphate ester does not occur. The hydrothermal decomposition reaction can be performed efficiently.

FIG. 1 is a schematic diagram of an apparatus for removing an aromatic phosphate ester in waste oil according to a first embodiment. FIG. 2 is a schematic diagram of an apparatus for removing aromatic phosphate esters in waste oil according to the second embodiment. FIG. 3 is a schematic diagram of an apparatus for removing an aromatic phosphate ester in another waste oil according to the second embodiment. FIG. 4 is a schematic view of a waste oil treatment system containing polychlorinated biphenyl (PCB) equipped with an aromatic phosphate ester removing device in waste oil according to Example 3.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

An apparatus for removing aromatic phosphate esters from waste oil according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of an apparatus for removing an aromatic phosphate ester in waste oil according to a first embodiment.
As shown in FIG. 1, an aromatic phosphate ester removing device 10 </ b> A in waste oil is supplied from a storage tank 11 for storing waste oil 13 containing an aromatic phosphate 12 and a line L ₁ from the storage tank 11. A supply tank 14 for supplying a predetermined amount of waste oil 13 containing aromatic phosphate ester 12 and a waste oil 13 fed from the supply tank 14 via line L ₂ are brought into contact with an inorganic phosphate compound 51 filled therein. The reaction means 20 for proceeding the mineralization reaction, the heating part 21 for heating the reaction means 20 to a predetermined temperature, the analysis part 22 for analyzing the phosphorus (P) concentration of the reaction oil 19, and the reaction oil 19 and circulation line L ₃ to return to the supply tank 14, the analysis unit and the filter 26 for removing solid components in the reaction oil 19 on the basis of the results of 22, the filter 26 aromatic phosphoric acid ester after passing 1 There are those comprising a storage tank 28 for storing the processed waste oil 27 removed processed.
In FIG. 1, symbol V ₁ represents a switching valve, P ₁ and P ₃ represent feed pumps, and a line L ₄ represents a feed line.

Here, the reaction using the inorganic phosphate compound 51 is performed by bringing the aromatic phosphate ester 12 in the waste oil 13 into contact with the inorganic phosphate compound 51, thereby cleaving the ester bond of the aromatic phosphate ester, This is for mineralizing phosphorus.
Examples of the inorganic phosphate compound include zinc phosphate (Zn ₃ (PO ₄ ) ₂ ), iron phosphate (FePO ₄ ), sodium hydrogen phosphate (Na ₂ HPO ₄ ), and sodium phosphate (Na ₃ PO ₄ ). Any one can be mentioned.

The reaction means 20 is provided with a heating part 21 such as a heater for heating to about 80 to 100 ° C. in order to promote the mineralization reaction as shown in [Chemical Formula 1] below.
In the following [Chemical Formula 1], TCP (tricresyl phosphate) is taken as an example of the aromatic phosphate ester, and iron phosphate (FePO ₄ ) is taken as an example of the inorganic phosphate compound.
As shown in the reaction formula, TCP (tricresyl phosphate) is decomposed by the mineralization reaction, and P is mineralized as FePO ₄ .2H ₂ O, Fe ₂ P, FeP ₂ .

In the following [Chemical Formula 2], TCP (tricresyl phosphate) is taken as an example as an aromatic phosphate ester, and zinc phosphate (Zn ₃ (PO ₄ ) ₂ ) is taken as an example as an inorganic phosphate compound.
As shown in the reaction formula, TCP (tricresyl phosphate) is decomposed by the mineralization reaction, and P is mineralized as (Zn ₃ (PO ₄ ) ₂ ) and Zn ₃ P ₂ .

The state of the mineralization reaction of the waste oil 13 decomposed by the reaction means 20 is monitored by an analysis unit 22 that chemically analyzes the proportion of phosphorus (P) in the oil.
While the mineralization reaction does not proceed, the circulation line L ₃ is used to return to the supply tank 14 and the decomposition process by the reaction means 20 is repeated again.

The analysis result in the analysis unit 22 is sent to the determination unit 30, and when the ratio of phosphorus (P) reaches a predetermined concentration, it is determined that the decomposition is completed. Then, the control valve (not shown) switches the switching valve V ₁ and feeds it to the filter 26 interposed in the line L ₄ , where the solid content (iron powder, etc.) in the oil is removed. Thereafter, the treated waste oil 27 from which the aromatic phosphate ester 12 has been removed is stored in a storage tank 28.
Here, as the filter 26, it is preferable to use a metal filter (for example, an iron-based mesh filter). This is because the phosphoric acid ester 12 remaining in a trace amount in the oil layer 23 can be efficiently removed by attaching and removing phosphorus (P) from the metal iron (Fe) with a metal filter. .

  Thereafter, the treated waste oil 27 is treated by a predetermined waste oil treatment device (combustion treatment, hydrothermal decomposition treatment, etc.).

For example, iron phosphate or the like mineralized by the reaction process in the reaction means 20 is recovered using, for example, iron as a valuable resource after being washed with a solvent.
Examples of the cleaning solvent include isopropyl alcohol (IPA), hydrocarbon solvents (for example, “NS100 (trade name)”, JX Nippon Oil & Energy Corporation), hexane, 1-bromopropane, and the like. it can.

  According to the present invention, the aromatic phosphate ester 12 contained in the waste oil 13 can be efficiently treated by the mineralization reaction, and the subsequent waste oil (lubricating oil) becomes non-flammable and can be combusted. It becomes.

  Further, even when the waste oil 13 is processed by the hydrothermal oxidative decomposition apparatus 120, the aromatic phosphate ester 12 is removed in advance, so that the apatite formation due to the aromatic phosphate ester is caused during the hydrothermal oxidative decomposition process. Since it does not occur, the hydrothermal decomposition reaction of insulating oil or lubricating oil can be performed efficiently.

An apparatus for removing an aromatic phosphate ester in waste oil according to Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 2 is a schematic diagram of an apparatus for removing aromatic phosphate esters in waste oil according to the second embodiment. FIG. 3 is a schematic diagram of an apparatus for removing an aromatic phosphate ester in another waste oil according to the second embodiment.
As shown in FIG. 2, the aromatic phosphate ester removing device 10 </ b> B in the waste oil is supplied from a storage tank 11 that stores the waste oil 13 containing the aromatic phosphate ester 12 through the line L ₁₁ from the storage tank 11. and the waste oil 13 containing an aromatic phosphoric acid ester 12 a predetermined amount and supplies the supply tank 14, stirring means for mixing water 16A from the water supply tank 15A to the waste oil 13 is fed by the line L ₁₂ from the supply tank 14 a mixing tank 18 provided with a 17, the water 16A is fed by the line L ₁₃ waste oil 13 mixed feeds, is contacted with an inorganic phosphoric acid compound 51 is filled by inorganic reaction, mineralized phosphate Reaction unit 20 for heating, heating unit 21 for heating the reaction unit 20, and analysis unit for analyzing the ratio of phosphorus (P) in oil or phosphoric acid (H ₃ PO ₄ ) in water in the reaction solution 31 22 The a circulation line L ₁₄ for returning the reaction solution 31 in the mixing tank 18, allowed to stand the reaction mixture 31 based on the result of the analysis unit 22, a stationary tank 25 that is separated into a oil layer 23 and water layer 24, the A filter 26 that removes solid content in the oil layer 23, a storage tank 28 that stores treated waste oil 27 from which the aromatic phosphate ester 12 that has passed through the filter 26 has been removed, and phosphoric acid in the aqueous layer 24 are removed. And a wastewater treatment unit 29.
Examples of the inorganic phosphate compound include zinc phosphate (Zn ₃ (PO ₄ ) ₂ ), iron phosphate (FePO ₄ ), sodium hydrogen phosphate (Na ₂ HPO ₄ ), and sodium phosphate (Na ₃ PO _4). ).
In FIG. 2, reference numerals V ₁ and V ₂ denote switching valves, P _{1 to} P ₃ denote feed pumps, and lines L _{15 to} L ₁₈ denote feed lines.

The water 16A supplied from the water supply tank 15 is supplied to promote the mineralization reaction and is added to the waste oil 13 by about 10% by weight.
When the content of the aromatic phosphate 12 is small, the amount of water 16A added is reduced.

Here, in order to promote the reaction, steam may be supplied instead of supplying water 16A.
The waste oil 13 to which water 16A has been added is subjected to mineralization reaction treatment in the reaction means 20 in the same manner as in Example 1 so as to mineralize the aromatic phosphate ester.

As shown in FIG. 3, in the aromatic phosphate ester removing device 10C in the waste oil, a phosphoric acid aqueous solution (H ₃ PO ₄ ) 16B is supplied from a phosphoric acid aqueous solution supply tank 15B instead of water or water vapor. ing.
As shown in [Chemical Formula 3] below, by adding the phosphoric acid aqueous solution (H ₃ PO ₄ ) 16B, the phosphoric acid aqueous solution functions as a solubilizer and the liquidity in the waste oil 13 is acidic (pH To about 5), the bond of the aromatic phosphate is broken, and mineralization is promoted.
In the following [Chemical Formula 3], TCP (tricresyl phosphate) is taken as an example as an aromatic phosphate ester, and iron phosphate (FePO ₄ ) is taken as an example as an inorganic phosphate compound.
As shown in the reaction formula, TCP (tricresyl phosphate) is decomposed by the mineralization reaction, and P is mineralized as FePO ₄ .2H ₂ O, Fe ₂ P, FeP ₂ .
In addition, although the density | concentration of phosphoric acid aqueous solution is not limited, the one where the density | concentration is higher is preferable from the relationship of water treatment.
This is because the use of an aqueous phosphoric acid solution as a substitute for water can reduce the water drainage treatment.

The reaction solution 31 decomposed by the mineralization reaction by the reaction means 20 is decomposed by the analysis unit 22 that chemically analyzes the proportion of phosphoric acid (H ₃ PO ₄ ) in the water or phosphorus (P) in the oil. To monitor.
While the decomposition does not proceed, the circulation line L ₁₄ is used to return to the mixing tank 18 and the emulsification by the reaction means 20 is repeated again.

The analysis result in the analysis unit 22 is sent to the determination unit 30, where the mineralization is completed when the ratio of phosphoric acid (H ₃ PO ₄ ) or phosphorus (P) reaches a predetermined concentration. Then, the switching valve V ₁ is switched and fed to the stationary tank 25 via the line L ₁₅ .
Here, as the predetermined concentration, for example, when 10% or less of the aromatic phosphate ester 12 is contained in the oil, when determining the ratio of phosphoric acid (H ₃ PO ₄ ) in water, When the acid is about 20% or more, it is determined that the reaction has progressed and the mineralization of the aromatic phosphate 12 has been completed.
On the other hand, when determining the ratio of phosphorus (P) in the oil, it is determined that the mineralization proceeds and the transition from the oil layer 23 to the water layer 24 is completed when phosphorus becomes about 10 to 100 ppm. To do.
This determination may be made both or may be either one.
The oil tank 23 and the water layer 24 are separated by being allowed to stand for a predetermined time in the stationary tank 25.
The threshold for mineralization completion depends on the requirements of the processing facility, but generally <100 ppm is considered in the oil after reaction. When water is added, the form existing on the water layer side is phosphoric acid (H ₃ PO ₄ ), and the surface of the metal (iron) is inorganic phosphorus (Fe ₂ P, FeP ₂ ).

Thereafter, the oil layer 23 is fed to the filter 26 through the line L ₁₆ and the line L ₁₇ , where the solid content in the oil is removed. Thereafter, the treated waste oil 27 from which the aromatic phosphate ester 12 has been removed is stored in a storage tank 28.
Here, as the filter 26, in order to efficiently remove the aromatic phosphate ester 12 remaining in a trace amount in the oil layer 23, a metal filter (for example, an iron-based mesh filter) is used, and metal iron (P) is used. The phosphorus is adhered and removed.

  Thereafter, the treated waste oil 27 is treated by a predetermined waste oil treatment device (combustion treatment, hydrothermal decomposition treatment, etc.).

  According to the present invention, the aromatic phosphate ester in the waste oil can be efficiently treated by hydrolysis, and the subsequent waste oil (lubricating oil) becomes incombustible and combustion treatment is possible.

Further, after the processing of the oil layer 23 has been completed, it switches the switching valve V _2, the aqueous layer 24 feed by a line L ₁₈ to the waste water treatment unit 29 feeds, to fix process phosphoric acid.
The wastewater treatment unit 29 for fixing phosphoric acid has an inorganic filling tank filled with a solid adsorbent containing at least one of Ca, Mg, Na, and Al, for example, and phosphoric acid is fixed with a metal salt. (For example, apatite (Ca ₅ (PO ₄ ) ₃ (F, Cl, OH)) is generated). Thereafter, the pH is adjusted in a pH adjusting tank and then discharged to the outside.

  Further, even when the waste oil 13 is processed by the hydrothermal oxidative decomposition apparatus 120, the aromatic phosphate ester 12 is removed in advance, so that the apatite formation due to the aromatic phosphate ester is caused during the hydrothermal oxidative decomposition process. Since it does not occur, the hydrothermal decomposition reaction of insulating oil or lubricating oil can be performed efficiently.

A waste oil treatment system including an apparatus for removing aromatic phosphate esters in waste oil according to an embodiment of the present invention will be described with reference to the drawings. FIG. 4 is a schematic view of a waste oil treatment system containing polychlorinated biphenyl (PCB) equipped with an aromatic phosphate ester removing device in waste oil according to Example 3.
As shown in FIG. 4, the waste oil treatment system 100 provided with the apparatus for removing aromatic phosphate esters in waste oil includes an aromatic phosphate ester removal apparatus 10A (10B, 10C) in waste oil according to Example 1 or Example 2. ) And a hydrothermal oxidative decomposition apparatus 120 for hydrothermal oxidative decomposition treatment of PCB.
Here, the schematic structure of the hydrothermal oxidative decomposition apparatus 120 is as follows. The processing waste oil 27 from which the aromatic phosphate ester 12 is removed, the oil (for reaction promotion) 35, sodium hydroxide (NaOH) 32, pure water 33 and oxygen ( A cylindrical primary reaction column 101 into which O ₂ ) 34 is charged, a secondary reaction column 107 for completing the decomposition treatment reaction, a cooler 108 and a pressure reducing valve 109 for the reactor are provided. A gas-liquid separator 110 that separates waste water (H ₂ O, NaCl) 114 and exhaust gas (CO ₂ ) 112 is disposed downstream of the pressure reducing valve 109. The secondary reaction column 107 can be omitted as necessary.

In the hydrothermal oxidative decomposition apparatus 120, the pressure in the primary reaction tower 101 is increased to, for example, about 26 MPa by pressurization with a pressure pump. The heat exchanger 121 preheats H ₂ O to about 300 ° C. Further, oxygen 34 from the high-pressure oxygen supply equipment 117 is jetted into the primary reaction tower 101, and the temperature is raised to 350 ° C. to 400 ° C. (preferably up to 370 ° C.) by the internal reaction heat. By this stage, an oxidative decomposition reaction has occurred in the primary reaction tower 101, and the PCB contained in the treated waste oil 27 has been decomposed into CO ₂ and H ₂ O. Next, in the cooler 108, the fluid from the secondary reaction tower 107 is cooled to about 100 ° C. and the pressure is reduced to atmospheric pressure by the pressure reducing valve 109 at the subsequent stage. Then, CO ₂ and water vapor and the treatment liquid are separated by the gas-liquid separator 110, and the CO ₂ and water vapor are exhausted from the chimney 113 into the environment as the exhaust gas 112 through the activated carbon layer 111. The drainage 114 is treated to a predetermined standard and temporarily stored in the discharge tank 115. 120a to 120d are storage tanks, 122a to 122d are pumps, and 123 is a mixer.

  Thus, according to the present embodiment, even when the waste oil 13 is processed by the hydrothermal oxidative decomposition apparatus 120, the aromatic phosphate ester removing device 10A (10B, 10C) in the waste oil is previously removed from the aromatic phosphate ester 12. ), The apatite formation caused by the aromatic phosphate ester 12 does not occur during the hydrothermal decomposition process in the hydrothermal oxidative decomposition apparatus 120, and the hydrothermal energy of the waste oil (insulating oil or lubricating oil) 13 is eliminated. The decomposition reaction can be performed stably.

  As described above, according to the apparatus for removing aromatic phosphate ester from waste oil according to the present invention, the aromatic phosphate ester in waste oil can be efficiently processed by hydrolysis, and subsequent waste oil treatment is simple. It becomes.

10A, 10B, 10C Aromatic phosphate ester removal device in waste oil 12 Aromatic phosphate ester 13 Waste oil 16A Water 16B Phosphoric acid aqueous solution 18 Mixing tank 19 Reaction oil 20 Reaction means 21 Heating part 22 Analysis part 23 Oil layer 24 Water layer 25 Static tank 26 Filter 27 Treatment waste oil 29 Waste water treatment part 30 Judgment part 31 Reaction liquid 51 Inorganic phosphate compound

Claims (9)

A supply tank for supplying a predetermined amount of waste oil containing an aromatic phosphate;
Reaction means for bringing the waste oil fed from the supply tank into contact with an inorganic phosphate compound filled therein to advance the mineralization reaction;
A heating unit for heating the reaction means to a predetermined temperature;
An analysis unit for analyzing the phosphorus (P) concentration of the reaction oil, a circulation line for returning the reaction oil to the supply tank,
A device for removing aromatic phosphate esters in waste oil, comprising a filter for removing solids in the reaction oil based on the result of the analysis unit. A supply tank for supplying a predetermined amount of waste oil containing an aromatic phosphate;
A mixing tank equipped with a stirring means for mixing the water or phosphoric acid aqueous solution from the water tank or phosphoric acid aqueous solution tank with the waste oil supplied from the supply tank;
A reaction tank in which waste oil mixed with water and an inorganic phosphoric acid compound are brought into contact with each other to be mineralized and phosphoric acid is mineralized;
A heating unit for heating the reaction vessel, an analysis unit for analyzing the proportion of phosphoric acid or phosphorus in the emulsion,
A circulation line for returning the reaction liquid to the mixing tank, a stationary tank for allowing the reaction liquid to stand based on the result of the analysis unit, and separating the oil into an oil layer, a filter for removing solids in the oil layer,
Aromatic in waste oil, comprising: a storage tank for storing treated waste oil from which aromatic phosphate ester has been removed after passing through the filter; and a waste water treatment section for removing phosphoric acid in the aqueous layer. Phosphate ester removal device. In claim 1 or 2,
The apparatus for removing an aromatic phosphate in waste oil, wherein the inorganic phosphate compound is any one of zinc phosphate, iron phosphate, sodium hydrogen phosphate, and sodium phosphate. In claim 2 or 3,
An apparatus for removing an aromatic phosphate ester in waste oil, wherein the amount of water or phosphoric acid aqueous solution added is 10% by weight or less. In any one of Claims 1 thru | or 4,
The apparatus for removing an aromatic phosphate ester in waste oil, wherein the heating temperature of the heating section is 80 to 100 ° C. In any one of Claims 2 thru | or 5,
Analyzing by the analysis unit, and having a determination unit that performs an operation of switching to a stationary tank when the concentration of phosphoric acid in water or the concentration of aromatic phosphate in oil reaches a predetermined concentration Equipment for removing aromatic phosphate esters from waste oil. In any one of Claims 2 thru | or 6,
In the waste oil characterized in that the waste water treatment unit has an inorganic filling tank filled with a solid adsorbent containing at least one of Ca, Mg, Na, and Al, and fixes phosphoric acid with a metal salt. Aromatic phosphate ester removal equipment. In any one of Claims 1 thru | or 7,
The apparatus for removing an aromatic phosphate in waste oil, wherein the waste oil contains polychlorinated biphenyl (PCB). An apparatus for removing aromatic phosphate ester from waste oil according to claim 8;
A waste oil treatment system containing polychlorinated biphenyl (PCB), comprising: a hydrothermal oxidative decomposition apparatus for decomposing polychlorinated biphenyl (PCB) in the waste oil from which the aromatic phosphate ester has been removed.

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