Treatment system of plant oil and fat and treatment method of plant oil and fat

Abstract

To efficiently recover oil contained in oily waste by an easy method and a simple structure, enabling energy saving and reduction in costs of electric power and labor.SOLUTION: A treatment system of oily waste which recovers and purifies oil of oily waste M having an oil content includes: a heater 20 which heats the oily waste M supplied thereinto to generate a gas G0; a condensing device 30 which condenses the generated gas G0 from the oily waste M in the heater 20; an oil and water separation device 40 which separates condensed oil G3 obtained by condensation in the condensing device 30 into oil and water; and a control unit 50 which controls the heater 20, the condensing device 30, and the oil and water separation device 40. The control unit 50 controls so that heating in an anoxic condition, gasification according to a boiling point temperature of the targeted oil content of the oily waste M, followed by condensation, and oil recovery are performed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an oily waste treatment system and an oily waste treatment method. [Background technology]

[0002] Conventionally, a known method for treating oily waste involves extracting and refining oil from oily waste such as cashew nut shell oil and palm oil (see, for example, Patent Document 1). In such an oily waste treatment method, as shown in the treatment flow in Figure 6, a high level of power is required and the oil is refined through complicated work processes.

[0003] In the process flow shown in Figure 6, cashew shells are first extracted, and the extracted oil is subjected to solid-liquid separation using, for example, a centrifugal separator. The liquid (oil) obtained by solid-liquid separation is then decarbonated by heating, and degummed to remove viscous substances. Further dehydration is performed, and the resulting oil is then dehydrated by heating and released upstream, yielding refined oil. After the extraction process, an oil extraction residue remains. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7337422 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional oily waste treatment methods require high power consumption and complicated work processes as described above, which has led to problems such as increased initial costs and running costs such as electricity and labor costs.

[0006] Furthermore, in the case of conventional processing methods, residual oil-containing residues generated during processing steps for producing vegetable oils and fats contain residual oil, making it difficult to process these residues as waste, and there was room for improvement in this regard.

[0007] Furthermore, there is no method other than combustion for treating sludge containing mineral oil as oily waste, and there has been a demand for a method for recovering oil and saving energy.

[0008] The present invention has been made in consideration of the above-mentioned problems, and aims to provide an oily waste treatment system and an oily waste treatment method that can efficiently recover oil contained in oily waste using a simple structure and a simple method, thereby saving energy and reducing electricity and labor costs. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, the oily waste treatment system of the present invention is an oily waste treatment system that recovers and refines oil from oily waste containing oil, and is equipped with a heating device that heats the oily waste supplied thereto to generate generated gas, a condensing device that gasifies and condenses the generated gas from the oily waste generated in the heating device, an oil-water separation device that separates the treated water condensed in the condensing device into oily water, and a control unit that controls the heating device, the condensing device, and the oil-water separation device, and is characterized in that the control unit controls the heating under oxygen-free conditions, gasifies and condenses the oil according to the boiling point temperature of the target oil content in the oily waste, and recovers the oil.

[0010] Furthermore, the oily waste treatment method of the present invention is a method for recovering and refining oil from oily waste containing oil using the oily waste treatment system described above, and includes the steps of heating the oily waste supplied inside to generate generated gas, gasifying and condensing the generated gas from the oily waste generated in the heating device, and separating the condensed treated water into oily water, characterized in that the method heats the oily waste under oxygen-free conditions, gasifies and condenses the oil according to the boiling point temperature of the target oil content in the oily waste, and controls the system to recover the oil.

[0011] In the present invention, when recovering oil from oily waste, an appropriate amount of oily waste is supplied to a heating device and heated to generate gas, and the gasified generated gas is condensed in a condensing device and separated into oil and water in an oil-water separator, making it possible to effectively recover and reuse only the separated oil. In this case, by heating under oxygen-free conditions, gasifying and condensing the oil in the oily waste according to the boiling point temperature, and controlling the process to recover the oil, it is possible to operate the treatment equipment with high energy efficiency, and to carry out efficient treatment using inert gases such as carbon dioxide gas and nitrogen gas.The waste residue, from which the oil has been removed by increasing the temperature of the heating equipment, can then be used as semi-carbonized or carbonized material. In this way, the present invention can efficiently recover oil contained in oily waste using a simple structure and a simple method, thereby reducing the energy required for the treatment device and reducing the costs of electricity and labor.

[0012] In addition, the oily waste treatment system of the present invention may be characterized by having a first fuel supply path that sends the recovered oil separated in the oil-water separation device to the heating device, and a second fuel supply path that returns a portion of the generated gas generated in the heating device to the heating device.

[0013] In this case, the recovered oil separated in the oil-water separator can be sent to the heating device through the first fuel supply line, and a portion of the generated gas generated in the heating device can be returned to the heating device through the second fuel supply line. Therefore, the recovered oil and a portion of the generated gas are reused as heating fuel in the heating device, thereby reducing the cost of heating by the heating device.

[0014] In addition, the oily waste treatment system of the present invention may be characterized in that the control unit controls the heating device to gradually increase the heating temperature, and controls the condensation device to condense oil components with different boiling points and recover them in the oil-water separation device.

[0015] In this case, by gradually increasing the temperature using a heating device, oils with different boiling points can be efficiently separated and refined.

[0016] In addition, the oily waste treatment system of the present invention is characterized in that the waste residue, from which the oil has been removed along with the generated gas by being heated in the heating device, is recovered as semi-carbonized or carbonized material.

[0017] In the present invention, the waste residue of oily waste that has been heat-treated becomes semi-carbonized or carbonized material with as little residual oil as possible, so this waste residue can be efficiently treated as waste.

[0018] In addition, the oily waste treatment system according to the present invention may be characterized in that the heating device creates the oxygen-free conditions by using superheated steam generated by introducing steam into the heating device, or by using an inert gas introduced into the heating device.

[0019] In this case, by introducing water vapor to make the inside of the heating device oxygen-free, the water vapor becomes superheated steam in the heating device, and the inside of the heating device can be efficiently made oxygen-free, allowing the treatment device to be operated with high energy efficiency. Similarly, when an inert gas is introduced into the heating device, the inside can be efficiently made oxygen-free, allowing the treatment device to be operated with high energy efficiency. Furthermore, when superheated steam is generated inside the heating device, the superheated steam can suppress adhesion of tar and the like to the inner wall surfaces of the heating device, which has the advantage of reducing the time and effort required for removing tar that has adhered to the inner wall surfaces, and also suppressing a decrease in combustion efficiency due to adhesion.

[0020] In addition, the oily waste treatment system of the present invention may be characterized in that the condensation device has an off-gas flow path through which the off-gas produced by cooling and condensing the generated gas in the condensation device passes, and the off-gas flow path is provided with a pressure reducing device that reduces the pressure in the heating device.

[0021] In this case, the pressure reducing device provided in the off-gas flow path of the condenser can reduce the pressure in the heating device, thereby promoting gasification by the heating device. Since the generated gas becomes hot when the pressure reducing device is installed between the condenser and the oil-water separator, the above effect can be obtained by installing the pressure reducing device in the off-gas flow path immediately after the generated gas is cooled and condensed by the condenser. [Effects of the Invention]

[0022] According to the oily waste treatment system and oily waste treatment method of the present invention, the oil contained in the oily waste can be efficiently recovered using a simple structure and a simple method, thereby saving energy and reducing the costs of electricity and labor. [Brief explanation of the drawings]

[0023] [Figure 1]1 is a diagram showing a schematic diagram of an oily waste treatment system according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing a schematic flow of the oily waste treatment system shown in FIG. [Figure 3] FIG. 10 is a diagram showing the relationship between heating temperature and residual error for setting the heating temperature of oily waste. [Figure 4] FIG. 10 is a diagram showing the recovery results by heating in the first embodiment. [Figure 5] FIG. 10 is a diagram showing the recovery results by heating in the second embodiment. [Figure 6] FIG. 1 is a diagram showing a schematic flow of a conventional oily waste treatment system. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an oily waste treatment system and an oily waste treatment method according to an embodiment of the present invention will be described with reference to the drawings.

[0025] The oily waste treatment system according to this embodiment shown in FIGS. 1 and 2 (hereinafter referred to as oil recovery system 1) is for recovering and refining oil (recovered oil G5) from oily waste M containing oil. As the oily waste M, for example, palm oil residue, cashew nut shells, mineral oil sludge, residues of energy plants, etc. can be used.

[0026] As shown in Figure 1, the oil recovery system 1 includes a heating device 20 that heats oily waste M supplied thereto to generate generated gas G0, a condensing device 30 that gasifies and condenses the generated gas G0 from the oily waste M generated in the heating device 20, an oil-water separation device 40 that separates the treated water (condensed oil G3) condensed in the condensing device 30 into oily water, and a control unit 50 that controls the heating device 20, the condensing device 30, and the oil-water separation device 40.

[0027] The heating device 20 generates generated gas G0 by heating the oily waste M supplied thereto in a sealed state within a heating chamber 22. The heating device 20 has an outer shell 21 formed from, for example, a box-shaped steel material, and has the heating chamber 22 into which an appropriate amount of raw material (oily waste M) is supplied, and a combustion chamber 23 for heating the inside of the heating chamber 22.

[0028] The outer shell 21 is sealed and configured to be able to block oxygen from entering the heating chamber 22. As a specific example, water vapor W is introduced into the heating chamber 22 to generate superheated steam, thereby creating an oxygen-free condition. Here, in order to make the heating chamber 22 of the heating device 20 oxygen-free, in this embodiment, superheated steam generated by introducing water vapor W into the heating chamber 22 is used, but the method is not limited to superheated steam. For example, by using an inert gas such as CO2 or N2 introduced into the heating device 20, it is possible to prevent explosion and oxidation of oil. For example, N2 gas can be extracted from air using the PSA method (pressure swing adsorption).

[0029] The heating device 20 is a batch-type stationary treatment structure, and the heating chamber 22 is set to an internal space of an appropriate size. Therefore, the raw material (oily waste M) supplied to the inside of the heating device 20 is not crushed or chipped, and the oily waste M is fed into the heating device 20 in its original form.

[0030] The heating chamber 22 is provided with a raw material supply section 24 to which the raw material oily waste M is supplied, a steam introduction section 25 to introduce steam W, and a gas discharge path 26 to extract the generated gas G0 produced by gasifying the oily waste M heated in the heating chamber 22.

[0031] The raw material supply section 24 is an airtight door that can be opened and closed relative to the outer shell 21, and is arranged, for example, on the side of the outer shell 21, so that it can be opened and closed manually or automatically. The steam introduction section 25 and the gas discharge path 26 are made of steel pipes or the like of appropriate diameters, and their connection positions relative to the heating chamber 22 are also set appropriately.

[0032] The combustion chamber 23 is connected to a first fuel supply passage 61 through which a portion of the recovered oil G5 (recovered oil G51) recovered in a recovered oil tank 60 (described later) is supplied via the oil-water separator 40, and to a second fuel supply passage 26A through which a first off-gas G1, which is a portion of the generated gas G0, is supplied. That is, the combustion chamber 23 is equipped with an off-gas burner 27A that generates combustion using the first off-gas G1 as a heat source, and a heating burner 27B that generates combustion using the recovered oil G51 as a heat source. In the combustion chamber 23, in the case of the oily waste M of this embodiment, the temperature inside the heating chamber 22 is heated to maintain, for example, a temperature of 200 to 300°C (see FIG. 3).

[0033] FIG. 3 shows the relationship between the heating temperature (°C) for setting the heating temperature for oily waste M in cashew nuts and the content (%) determined by thermogravimetry (TG). In FIG. 3, the horizontal axis represents temperature (°C) and the vertical axis represents the content (%) determined by thermogravimetry (TG). FIG. 3 shows a liquid obtained from the shells of natural cashew nuts after the cashew nuts have been removed (natural CNSL) and a liquid obtained from the shells of industrial cashew nuts after the cashew nuts have been removed (industrial CNSL). Natural CNSL is primarily composed of anacardic acid. On the other hand, industrial CNSL is subjected to a heat treatment after extraction, which decarboxylates the anacardic acid, resulting in cardanol being the primary component.

[0034] As shown in Figure 3, the main component of cashew shell oil from cashew nuts is anacardic acid, which is decarbonated at around 180°C and converted to cardanol, and so it can be seen that cardanol is gasified by heating to around 180°C to 300°C. For this reason, it is effective to set the heating temperature of oily waste M in the range of 200 to 300°C.

[0035] The water vapor introduction section 25 supplies water vapor W into the heating chamber 22 during heating, and by converting the water vapor W heated in the heating chamber 22 into superheated water vapor, adhesion to the inner wall surface of the heating chamber 22 can be suppressed.

[0036] The gas discharge path 26 is a pipe that is connected at one end to the heating chamber 22 and at the other end to the condenser 30, and is used to send the generated gas G0 generated in the heating chamber 22 to the condenser 30. The gas discharge path 26 branches into a second fuel supply path 26A connected to the combustion chamber 23. The first off-gas G1 that branches off at the gas discharge path 26 and passes through the second fuel supply path 26A is supplied to the combustion chamber 23 and reused as fuel for heating the heating chamber 22. Components of the first off-gas G1 include carbon monoxide (CO), hydrogen (H2), and methane (CH4).

[0037] In this way, in the heating device 20, the raw material oily waste M is heated at a predetermined temperature in an airtight environment to generate the generated gas G0, and the waste residue D from which the oil has been removed other than the generated gas G0 is recovered and disposed of by an appropriate method. Specifically, the waste residue D is recovered as a semi-carbonized or carbonized material.

[0038] The condenser 30 employs a known configuration in which cooling water W0 flows through a multi-tube heat exchanger. The condenser 30 condenses the generated gas G0 introduced from the heating device 20 at a low temperature to separate the generated gas G0 into condensed oil G3 and second off-gas G2. The condensed oil G3 is sent to the oil-water separator 40 through an oil supply passage 31.

[0039] The condenser 30 also includes an off-gas flow path 32 that passes through a second off-gas G2 obtained by cooling and condensing the generated gas G0 in the condenser 30. That is, the second off-gas G2 separated in the condenser 30 is supplied to the external combustion device 70 via the off-gas flow path 32 and is reused as external fuel. Components of the second off-gas G2 include carbon monoxide (CO), hydrogen (H2), methane (CH4), etc.

[0040] A pressure reducing device 33 for reducing the pressure in the heating device 20 is provided in the middle of the off-gas flow path 32. A pressure reducing fan, for example, can be used as the pressure reducing device 33. The pressure reducing conditions at this time can be set to, for example, 20 mmHg or less, since the boiling point of each oil or fat is about 230°C at a low vacuum of about 20 mmHg.

[0041] The oil-water separator 40 is connected to the condenser 30 through the oil supply passage 31 and serves to further separate the condensed oil G3 separated in the condenser 30 into oil G4 and water W1. The water W1 separated in the oil-water separator 40 is discharged. The oil G4 is sent to the recovered oil tank 60.

[0042] The recovered oil tank 60 is connected to the oil-water separation device 40 and is a device for recovering the recovered oil G5 separated by the oil-water separation device 40. The oil G4 recovered in the recovered oil tank 60 is sent to an oil refining device (not shown) as recovered oil G5, and a portion of the recovered oil G5 (recovered oil G51) is returned to the heating chamber 22 via the first fuel supply path 61 as heating fuel in the heating device 20. The oil refining device (not shown) can be a well-known device that has the function of refining a portion (recovered oil G52) of the recovered oil G5 separated in the oil-water separation device 40 into refined fuel, and the refined oil is used as an appropriate fuel.

[0043] The control unit 50 controls the heating device 20 to heat under oxygen-free conditions, gasify and condense the target oil content of the oily waste M according to the boiling point temperature, and recover the oil. A specific control method by the control unit 50 is to control the heating device 20 to increase the heating temperature in stages, and to condense oil content with different boiling points in the condenser 30 and recover it in the oil-water separator 40.

[0044] Next, the method for treating oily waste M using the oil recovery system 1 for oily waste M described above includes, as shown in Figures 1 and 2, a step of heating the oily waste M supplied inside to generate generated gas G0, a step of gasifying and condensing the generated gas G0 of the oily waste M generated in the heating device 20, and a step of separating the condensed treated water (condensed oil G3) into oily water in the condensation device 30. Then, the control unit 50 controls the oily waste M to be heated under oxygen-free conditions, gasified and condensed according to the boiling point temperature of the target oil content, and recovered oil G5, which becomes refined oil, in the oil-water separation device 40 and the recovered oil tank 60.

[0045] Next, the operation of the oil recovery system 1 for oily waste and the method for treating oily waste will be described in detail with reference to the drawings. In this embodiment, when recovering oil from oily waste M, an appropriate amount of oily waste M is supplied to a heating device 20 and heated to generate generated gas G0, and the gasified generated gas G0 is condensed in a condensation device 30 and separated into oil and water in an oil-water separation device 40, and only the separated oil (recovered oil G5) can be effectively recovered and reused.

[0046] In this case, by heating under oxygen-free conditions, gasifying and condensing the oil content of the oily waste M according to its boiling point, and controlling the process to recover the oil, it is possible to operate the treatment equipment with high energy efficiency, and to carry out efficient treatment using inert gases such as carbon dioxide gas and nitrogen gas.The waste residue D, from which the oil has been removed by increasing the temperature of the heating device 20, can be used as a semi-carbonized or carbonized material.

[0047] In this way, in this embodiment, the oil contained in the oily waste M can be efficiently recovered using a simple structure and a simple method. Therefore, the energy required for the treatment device can be saved, and the costs for electricity and work can be reduced.

[0048] In addition, this embodiment is equipped with a first fuel supply path 61 that sends recovered oil G5 (G51) separated in the oil-water separation device 40 to the heating device 20, and a second fuel supply path 26A that returns a portion of the generated gas G0 generated in the heating device 20 to the heating device 20.

[0049] This allows the recovered oil G5 (G51) separated in the oil-water separator 40 to be sent to the heating device 20 through the first fuel supply path 61, and further allows a portion of the generated gas G0 generated in the heating device 20 to be returned to the heating device 20 through the second fuel supply path 26A. Therefore, the recovered oil G5 and a portion of the generated gas G0 are reused as heating fuel in the heating device 20, thereby reducing the cost of heating by the heating device 20.

[0050] In addition, in this embodiment, the control unit 50 controls the heating device 20 to gradually increase the heating temperature, and controls the condensation device 30 to condense oil components with different boiling points and recover them in the oil-water separation device 40.

[0051] As a result, by gradually increasing the temperature with the heating device 20, oil components with different boiling points can be efficiently separated and refined.

[0052] In this embodiment, the waste residue D, which has been heated by the heating device 20 and from which the oil has been removed together with the generated gas G0, is recovered as semi-carbonized or carbonized material.

[0053] As a result, the waste residue D of the heat-treated oily waste M becomes a semi-carbonized or carbonized substance with as little oil remaining as possible, so this waste residue D can be efficiently treated as waste.

[0054] In the present embodiment, the heating device 20 uses superheated steam generated by introducing water vapor W into the heating device 20, thereby creating an oxygen-free condition.

[0055] As a result, by introducing water vapor W to make the inside of the heating device 20 oxygen-free, the water vapor W becomes superheated steam inside the heating device 20, and the inside of the heating device 20 can be efficiently made oxygen-free, allowing the processing device to be operated with high energy efficiency. Moreover, in this case, superheated steam is generated inside the heating device 20, which can prevent tar and the like from adhering to the inner wall surfaces of the heating device 20. This has the advantage of reducing the time and effort required for removing tar that has adhered to the inner wall surfaces, and also preventing a decrease in combustion efficiency due to adhesion.

[0056] In this embodiment, the condenser 30 includes an off-gas passage 32 through which a second off-gas G2 obtained by cooling and condensing the generated gas G0 in the condenser 30 passes. A pressure reducing device 33 that reduces the pressure in the heating device 20 is provided in the off-gas passage 32.

[0057] As a result, the pressure reducing device 33 provided in the off-gas flow path 32 of the condenser 30 can reduce the pressure in the heating device 20, thereby promoting gasification by the heating device 20. When the pressure reducing device 33 is installed between the condenser 30 and the oil-water separator 40 in this way, the generated gas G0 becomes hot, so the above-mentioned effect can be obtained by installing the pressure reducing device 33 in the off-gas flow path 32 immediately after the generated gas G0 has been cooled and condensed in the condenser 30.

[0058] As described above, the oily waste M treatment system (oil recovery system 1) and oily waste M treatment method of this embodiment can efficiently recover the oil contained in the oily waste M using a simple structure and a simple method, thereby saving energy and reducing the costs of electricity and labor.

[0059] Next, an example will be described below that was carried out to verify the effects of the oil recovery system 1 for oily waste and the method for treating oily waste according to the embodiment described above.

[0060] (First Example) In the first example, lubricating oil was recovered from waste lubricating oil. Figure 4 shows the results of recovery by heating in the first example. In Figure 4, the horizontal axis represents the carbon number composition (Carbon Number) and the vertical axis represents the percentage (%) of lubricating oil contained in the waste lubricating oil. Figure 4 shows the results before and after lubricating oil treatment. As a result of heat recovery using the oil recovery system 1 of this embodiment, it was found that the used lubricating oil was recovered with approximately the same carbon number composition after heat treatment, as shown in Figure 4. Therefore, it was confirmed that the lubricating oil used in oil drilling contains a large amount of residue after use and is discarded, but it can be reused efficiently.

[0061] (Second Example) In the second example, oil was recovered from mineral oil sludge. Figure 5 shows the results of recovery by heating in the second example. In Figure 5, the horizontal axis represents the carbon number composition, and the vertical axis represents the percentage of oil contained in the mineral oil sludge. Figure 5 shows the results before and after oil sludge treatment. Using the oil recovery system 1 of this embodiment, mineral oil sludge containing a large amount of silt was thermally recovered. As shown in Figure 5, the mineral oil sludge was heavy oil, but the recovered oil after thermal treatment was recovered as oil with a carbon number composition equivalent to that of diesel oil. The heavy oil was decomposed by heating and converted into carbon. This confirmed that mineral oil sludge can be efficiently reused.

[0062] The above describes embodiments of the oily waste treatment system and oily waste treatment method according to the present invention, but the present invention is not limited to the above embodiments and can be modified as appropriate within the scope of its intent.

[0063] For example, in this embodiment, the heating device 20 is of a batch type, but is not limited to this and may be of a rotary type and continuous type. By adopting such a continuous type, the processing amount increases and the temperature inside the heating chamber 22 can be constantly maintained at 200 to 300°C, so that operation costs can be reduced.

[0064] Furthermore, in this embodiment, superheated steam generated from the steam W introduced into the heating chamber 22 of the heating device 20 is used, but it is not always necessary to add superheated steam.

[0065] In addition, this embodiment is configured to include a first fuel supply passage 61 that sends recovered oil G5 (G51) separated in the oil-water separation device 40 to the heating device 20, and a second fuel supply passage 26A that returns a portion of the generated gas G0 generated in the heating device 20 to the heating device 20, but it is also possible to omit such first fuel supply passage 61 and second fuel supply passage 26A.

[0066] In addition, in this embodiment, the control unit 50 is configured to control the heating device 20 to gradually increase the heating temperature, and to condense oil components with different boiling points in the condensing device 30 and recover them in the oil-water separation device 40, but is not limited to this type of control.

[0067] Furthermore, in this embodiment, the waste residue D is heated by the heating device 20 and the oil is removed together with the generated gas G0, and is then semi-carbonized or recovered as a carbonized material, but this is not limited to this.

[0068] Furthermore, in this embodiment, the heating device 20 is configured to introduce water vapor W thereinto and generate superheated water vapor to create an oxygen-free condition, but the present invention is not limited to this.

[0069] In addition, the components in the above-described embodiments can be replaced with well-known components as appropriate, without departing from the spirit of the present invention. [Explanation of symbols]

[0070] 1. Oil recovery system (oil waste treatment system) 20 Heating device 21 Exoskeleton 22 Heating chamber 23 Combustion chamber 24 Raw material supply department 25 Steam inlet 26 Gas exhaust channel 26A 2nd fuel supply path 30 Condenser 31 Oil supply passage 32 Off-gas flow path 33 Pressure reducing device 40 Oil / water separator 50 control section 60 Recovery Oil Tank 61 1st fuel supply path 70 External combustion device D. Waste Residuals G0 Evolved gas G1 First off-gas G2 Second off-gas G3 Condensed oil (treated water) G4 oil G5 Recovered Oil M Oily waste W Water vapor

Claims

1. An oily waste treatment system for recovering and refining oil from oily waste containing oil, a heating device that heats the oily waste supplied therein to generate generated gas; a condensation device that gasifies and condenses the gas generated from the oily waste generated in the heating device; an oil-water separator that separates the treated water condensed by the condenser into oil-water; a control unit that controls the heating device, the condensing device, and the oil-water separation device, The oily waste treatment system controls the control unit to heat the oily waste under oxygen-free conditions, gasify and condense the oil according to the boiling point temperature of the target oil content, and recover the oil.

2. a first fuel supply line for supplying the recovered oil separated by the oil-water separator to the heating device; 2. The oily waste treatment system according to claim 1, further comprising: a second fuel supply passage for returning a portion of the generated gas generated in the heating device to the heating device.

3. The oily waste treatment system described in claim 1, wherein the control unit controls the heating device to gradually increase the heating temperature, and controls the condensation device to condense oils with different boiling points and recover them in the oil-water separation device.

4. 2. The oily waste treatment system according to claim 1, wherein the waste residue from which the oil has been removed together with the generated gas by being heated in the heating device is recovered as semi-carbonized or carbonized material.

5. 2. The oily waste treatment system of claim 1, wherein the heating device creates the oxygen-free conditions by using superheated steam generated by introducing water vapor into the heating device or an inert gas introduced into the heating device.

6. the condenser includes an off-gas flow path through which the generated gas is cooled and condensed in the condenser passes, 2. The oily waste treatment system according to claim 1, wherein the off-gas passage is provided with a pressure reducing device for reducing the pressure in the heating device.

7. 7. A method for treating oily waste, comprising recovering and refining oil from oily waste containing oil using the oily waste treatment system according to claim 1, a step of heating the oily waste supplied therein to generate generated gas; a step of gasifying and condensing the generated gas of the oily waste generated in the heating device; Separating the treated water condensed in the condenser into oily water; and A method for treating oily waste, which comprises heating under oxygen-free conditions, gasifying and condensing the oil content of the oily waste in accordance with the boiling point temperature, and controlling the process so as to recover the oil.

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