KR20220079051A - Oil recovery device using pyrolysis and cryogenic condenser, and oil recovery method using the same - Google Patents

Abstract

The present invention discloses an apparatus for recovering oil from waste using pyrolysis and a cryogenic condenser, and an oil recovery method using the same. The oil recovery method includes: a first step of pyrolyzing waste including biomass, plastic, or textile in a reactor to generate an oil-containing gas; a second step of cooling the oil-containing gas to a first temperature in a first cooling unit to collect the liquefied first oil in the oil; a third step of collecting liquefied second oil by cooling the oil-containing gas discharged from the first cooling unit to a second temperature lower than the first temperature in a second cooling unit after the first oil is removed; includes

Description

Oil recovery device using pyrolysis and cryogenic condenser, and oil recovery method using the same}

The present invention relates to an oil recovery device using a pyrolysis and cryogenic condenser and an oil recovery method using the same, and more particularly, to pyrolyze waste and then apply primary cooling and cryogenic secondary cooling to recover and collect oil It relates to an oil recovery apparatus using a more efficient pyrolysis and cryogenic condenser, and an oil recovery method using the same.

In recent years, as the problem of environmental pollution and energy depletion due to waste increases worldwide, the need for recycling of waste and development of alternative energy technologies has been highlighted. Accordingly, research on the recycling of various new and renewable energies and wastes is being conducted, and among them, renewable energy that uses waste as a raw material to produce carbon-neutral and environmentally friendly energy is attracting attention.

By performing thermal and chemical processes using various types of waste (biomass, plastics, textiles, etc.) as raw materials, it can be made into a valuable energy form. can Among them, the thermal decomposition process is a method in which the raw material is decomposed by applying heat to the raw material under anoxic conditions in the absence of oxygen, and the raw material is changed to solid, liquid, or gaseous form and recovered. influenced by factors such as

In particular, conventional techniques using biomass are focused on increasing the yield of oil through rapid pyrolysis. However, in the case of rapid pyrolysis or general pyrolysis, the amount of oil that can be captured is larger than the amount of oil that can be captured, and the speed of passing through the device is different depending on the flow rate of the generated oil. have no choice but to In addition, since the oil generated by thermal decomposition is discharged in a high temperature state, a large amount of oil is evaporated and lost in a gaseous state.

There is a need to develop an improved system and apparatus capable of more efficiently recovering oil from waste by reducing the loss of oil as described above.

It is an object of the present invention to provide a method for recovering oil from waste that is more efficient than the conventional pyrolysis method, including additional cryogenic secondary cooling.

Another object of the present invention is to provide an apparatus for recovering oil from waste for carrying out the oil off-water and collection method.

According to an embodiment of the present invention, a method for recovering oil from waste includes a first step of pyrolyzing waste including biomass, plastic, or textile in a reactor to generate an oil-containing gas; a second step of cooling the oil-containing gas to a first temperature in a first cooling unit to collect the liquefied first oil in the oil; a third step of collecting liquefied second oil by cooling the oil-containing gas discharged from the first cooling unit to a second temperature lower than the first temperature in a second cooling unit after the first oil is removed; may include

In an embodiment, the first cooling unit includes a cooling tank to which a cooler is connected and a first impinger conduit immersed in the cooling tank, and in the first step, the oil-containing gas is introduced into the first impinger conduit. It may be characterized in that it is cooled to -3 °C to 0 °C.

In one embodiment, the second cooling unit includes one or more second impinger conduits disposed adjacent to each other, wherein the second impinger conduit forms a cooling space, and the first tube and the first tube are sealed at one end. and a second tube surrounding and forming a space for accommodating a refrigerant containing dry ice and acetone together with the first tube, wherein in the third step, the oil-containing gas is introduced into the second impinger conduit - It may be characterized in that it is cooled to 55 ℃ to -60 ℃.

In an embodiment, the weight ratio of acetone and dry ice in the refrigerant may be in a range of 1:0.5 to 1:1.2.

In one embodiment, the material collected by the second cooling unit is 5-methyl-2-(prop-1-en-2-yl)cyclohexanol, pyridin-4-ol, (Z)- It may be characterized as comprising tetradec-9-enal, (Z)-14-methylhexadec-8-enal or (Z)-octadec-13-enal.

In one embodiment, the waste is pulverized and then introduced into the reactor by an inert gas flowing material, the pyrolysis temperature is 300° C. to 800° C., and the pyrolysis temperature increase rate is 10° C./min to 230° C./min. can

In one embodiment, after the third step, injecting a solvent into the first cooling unit and the second cooling unit to collect the first oil and the second oil, and recovering the residual oil remaining in the inside of each cooling unit may further include.

In an embodiment, the residual oil may be dried at 50 to 70° C. for 20 to 28 hours.

In one embodiment, after the third step, the oil collected in the opening and closing device and the oil tank additionally installed at the lower end of the second cooling unit may be stored.

According to an embodiment of the present invention, "a device for recovering oil from waste" includes: a reactor for generating oil-containing gas by thermally decomposing the waste; a first cooling unit cooling the oil-containing gas input from the reactor to a first temperature to collect the liquefied first oil in the oil; and a second cooling unit for collecting liquefied second oil by cooling the oil-containing gas discharged from the first cooling unit to a second temperature lower than the first temperature after the first oil is removed; The second cooling unit may cool the oil-containing gas to -55°C to -60°C using a refrigerant containing acetone and dry ice in a weight ratio of 1:0.5 to 1:1.5.

In one embodiment, there is provided a conduit through which the oil-bearing gas of the waste flows; and a feedstock of the conduit into which the waste is introduced, wherein the conduit may pass through the reactor, the primary cooling unit, and the secondary cooling unit in order.

In one embodiment, the feedstock may further include a mixer therein.

According to the present invention, unlike the conventional pyrolysis oil recovery method that uses the cooling process only once, the recovery rate of oil is excellent compared to the conventional pyrolysis oil recovery method by additionally including cryogenic secondary cooling. In addition, by utilizing the gas generated during the pyrolysis process as an auxiliary heat source, the heating efficiency and thermal decomposition efficiency of the waste can be improved compared to the conventional pyrolysis oil recovery method.

1 is a view for explaining the structure of an oil recovery device of the present invention.
2 is a view for explaining another example of the oil recovery device of the present invention.
3 is a view for explaining the structure of the mixer further included in the inside of the feedstock of the present invention.
4 is a graph showing the temperature of the secondary cooling unit with respect to the weight ratio of dry ice to acetone.
5 is a graph measuring the relationship between the melting rate of the refrigerant to the weight ratio of dry ice to acetone.

Hereinafter, embodiments of the present invention will be described in detail. Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

Throughout the specification, when a part "includes" or "includes" a certain element, it means that other elements may be further included unless otherwise defined. Also, as used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, and are clearly defined in this application. Unless defined, it is not to be construed in an idealistic or overly formal sense.

1 to 3 are views for explaining the structure of an apparatus for recovering oil from waste of the present invention. 1 to 3 , the oil recovery device of the present invention includes: a reactor for pyrolyzing the waste to generate an oil-containing gas; a first cooling unit cooling the oil-containing gas input from the reactor to a first temperature to collect the liquefied first oil in the oil; and a second cooling unit for collecting liquefied second oil by cooling the oil-containing gas discharged from the first cooling unit to a second temperature lower than the first temperature after the first oil is removed; may include

Here, the second cooling unit may cool the oil-containing gas to about -55°C to -60°C using a refrigerant containing acetone and dry ice in a weight ratio of about 1:0.5 to 1:1.5.

a first step of generating an oil-containing gas by thermally decomposing waste including biomass, plastic, or textile in a reactor (Furnace) using the oil recovery device; a second step of cooling the oil-containing gas to a first temperature in a first cooling unit to collect the liquefied first oil in the oil; a third step of collecting liquefied second oil by cooling the oil-containing gas discharged from the first cooling unit to a second temperature lower than the first temperature in a second cooling unit after the first oil is removed; oil can be recovered from the waste.

In the present invention, the waste may be biomass, plastic, or fabric, for example, solid waste such as plastic, tire, rubber, sludge, and biomass such as food waste, sawdust, and animal manure. The oil derived from the waste may be manufactured through a dehydrogenation reaction by a pyrolysis process of the waste, and then used as a petrochemical product or fuel (industrial heating/cooling facility, generator fuel or diesel engine, etc.).

In one embodiment, the waste may be pyrolyzed at a temperature of about 300° C. to 800° C. in the reactor, and at this time, the temperature increase rate for thermal decomposition of the waste may be about 10° C./min to 230° C./min. And, the thermal decomposition may proceed for about 1 minute to 1 hour.

As the particles of the waste become smaller, the area in contact with thermal energy increases and the efficiency of the thermal decomposition can be increased. can In one embodiment, the waste may be pulverized to a size of about 600 μm or less, for example, about 100 to 600 μm, and a ball mill process or the like may be used for the pulverization process.

On the other hand, different flow rates may be applied depending on the type of waste used in the present invention. Based on the volume of the second impinger conduit, when biomass is used, a flow rate of about 35%/min to 39%/min is applied. In the case of applying and using plastic, applying a flow rate of about 17%/min to 21%/min shows the highest oil capture efficiency.

The inert gas may be introduced not only to transport the waste, but also to render the pyrolysis environment of the waste oxygen-free or lean. Unlike direct combustion, pyrolysis is a process of decomposing into gas, oil, and residues by heating a pyrolysis target in a reactor in the absence or lean state of oxygen. Unlike direct combustion, which directly heats waste, oxygen is not required because only indirect heat energy is supplied. Therefore, it is possible to achieve more efficient thermal decomposition by using an inert gas as a carrier gas of waste during the pyrolysis process of the present invention. Argon, nitrogen, or carbon dioxide may be used as the inert gas.

The reactor is a device capable of heating heat to generate a pyrolysis reaction, and may generally include a blast furnace, a blast furnace or a furnace, and depending on the type that can be used as a pyrogen, a coke furnace, a charcoal furnace, or an electric furnace and the like.

In the present invention, the cooler of the first cooling unit serves to create a temperature environment capable of liquefying the oil-containing gas and collecting the first oil by lowering the temperature of the cooling tank. To this end, the temperature of the cooler may be about -7 to -4 °C, and the temperature of the cooling bath may be maintained by cooling to about -3 °C to 0 °C, preferably about -1 °C. For example, the cooler may include a chiller.

In one embodiment, the first cooling unit may include a cooling bath to which the cooler is connected and a first impinger conduit immersed in the cooling bath, and in the first step, the oil-containing gas is transferred to the first impinger conduit. It can be added to the cooling to about -3 ℃ to 0 ℃.

In addition, the cooling tank may have a first oil collecting part that is an empty space in which the first oil is collected, a first impinger conduit connected to the first oil collecting part, and a low temperature space in which the first oil collecting part is immersed. The low temperature space is connected to the cooler to maintain a temperature of about -3°C to 0°C. As the temperature of the low-temperature space is lowered, the temperature inside the first oil collecting unit is also lowered, so that the oil-containing gas injected into the first oil collecting unit may be partially liquefied.

In the present invention, the first impinger conduit is a kind of absorption pipe used when collecting various substances mixed in gas, and includes an inlet pipe through which gas enters and an outlet pipe through which the remaining gas collected and remaining gas is discharged. In addition, the first impinger conduit may include opening/closing means to reduce air contact with the outside.

In the present invention, the second cooling unit liquefies the residual oil-containing gas liquefied in the first cooling unit and not captured as oil to a second temperature lower than the first temperature of the first cooling unit, thereby additionally collecting oil and thus This can increase the total oil capture amount. In order to cool the first cooling unit to a second temperature lower than the first temperature, the second cooling unit may use a refrigerant including dry ice and acetone.

In one embodiment, the refrigerant may include the acetone and the dry ice in a weight ratio of about 1:0.5 to 1:1.2. When the weight ratio of the acetone to the dry ice is less than 1:0.5, a problem may occur that the temperature of the refrigerant increases. When the weight ratio of the acetone to the dry ice exceeds 1:1.2, the dry ice There may be a problem in that the time required for ice to dissolve in the acetone is greatly increased. For example, the refrigerant may include the acetone and the dry ice in a weight ratio of about 1:0.5 to 1:0.8.

Further, the second cooling unit may include one or more second impinger conduits disposed adjacently, in which case each of the second impinger conduits is a cooling unit for receiving the oil-containing gas discharged from the first cooling unit. It may include a first tube that forms a space and whose one end is sealed, and a second tube that surrounds the first tube and forms a space for accommodating a refrigerant including dry ice and acetone together with the first tube. In the third step, the oil-containing gas may be introduced into the second impinger conduit, and may be cooled to about -55°C to -60°C by the refrigerant.

In general, dry ice has a property of sublimating directly from a solid to a gas, and the sublimation point is -78.5°C, and the heat of vaporization at this time is 571 kJ/kg, which can be used as an effective refrigerant in the industrial field. In the present invention, the oil-containing gas can be cooled to about -55° C. to -60° C. by using the liquid obtained by mixing the dry ice with acetone as a refrigerant. can be captured in the state.

In an embodiment, the oil-containing gas in the second cooling unit may be maintained in a cooled state for about 1.5 to 4 hours.

The oil recovery device includes: a conduit through which the oil-containing gas of the waste moves; and a feedstock of the conduit into which the waste is introduced, and the conduit may pass through the reactor, the primary cooling unit, and the secondary cooling unit in order.

In addition, as shown in FIG. 1 , the oil recovery device may further include a hood for discharging the MFC and the final residual gas. In addition, as shown in FIG. 2 , it may further include an opening/closing device and an oil tank installed at the lower end of the secondary cooling unit, and as shown in FIG. 3 , inside the feedstock, for example, an internal lower end may additionally include a mixer.

Even after the collected oil is recovered, residual oil may exist on the walls of the first impinger conduit and the second impinger conduit. By injecting a solvent into the conduits to wash the solvent, residual oil may be additionally collected to increase the oil yield. At this time, the additionally collected residual oil is in a mixed state with the solvent, and a process of separating it may be additionally required.

In this process, after the third step, the step of injecting a solvent into the first cooling unit and the second cooling unit to collect the first oil and the second oil and recovering the residual oil remaining in the inside of each cooling unit is further added. At this time, in order to extract only the residual oil in a mixture with a solvent, to remove the solvent by drying the mixture, the residual oil is dried at about 50° C. to 70° C. for about 20 to 28 hours. can do it

Meanwhile, after the third step, an opening/closing device additionally installed at the lower end of the second cooling unit and a method in which the collected oil is stored in the oil tank may also be used. Instead of using a solvent to collect residual oil as described above, an opening/closing device and an oil tank are mounted at the lower end of the second cooling unit, and the lower end conduit is connected to further collect oil. After the thermal decomposition reaction is completed, when the opening and closing device is opened, the captured oil may move downward along the lower conduit and be stored in the lower oil tank.

Additionally, the feedstock may further include a mixer therein.

The feedstock is a place where waste is input, heated, and stored, and a thermal decomposition reaction may occur therein by thermal energy transferred by the reactor. During the implementation of the pyrolysis process, the waste may be stuck inside the feedstock for a long time. This prevents thermal decomposition of the waste from occurring well, and may ultimately have a negative effect of reducing the yield of oil. Therefore, in order to solve this problem, a mixer may be additionally installed at the inner bottom of the feedstock, which may induce the waste to be continuously mixed without being stuck. As a result, the waste can be pyrolyzed evenly to increase the amount of recovered oil. As such a mixer, a propeller structure may be used.

Examples of the present invention were carried out using the oil recovery apparatus and oil recovery method of the present invention described above, which will be described in detail below.

<Example>

As an embodiment of the present invention, a method for recovering oil using food waste will be described in detail below.

Food waste to be used as waste was finely pulverized to 600 μm using a ball mill. 1 g of pulverized food waste was put into a quartz tube of 24 × 600 mm, placed on a reactor, and nitrogen or carbon dioxide was injected. The injection rate of the nitrogen or carbon dioxide was set to 300 ml/min. After purging nitrogen or carbon dioxide three times in the reactor, a thermal decomposition reaction was started. The thermal decomposition reaction was carried out at a reaction temperature of 300°C to 700°C, and at an elevated temperature of 10°C/min to 230°C/min for 1 minute to 1 hour.

The oil-containing gas generated during the thermal decomposition reaction was injected into a cooling tank (h:58×W:21×L:8cm) through the first impinger conduit of the first cooling unit. At this time, the temperature of the first cooling unit was maintained at -1 °C. The oil-containing gas was liquefied by the temperature of the first cooling unit, and a part of the oil-containing gas was collected using 40 mL of dichloromethane contained in the cooling tank.

Thereafter, the residual oil-containing gas that is not captured is discharged from the first impinger conduit of the cooling tank and injected into the cooling space (id:47×h:310mm) of the first tube through the second impinger conduit of the second cooling unit. became Acetone and dry ice refrigerant having a weight ratio of acetone to dry ice of 1:0.5 were injected into the second tube surrounding the cooling space of the first tube. Using the refrigerant, the temperature of the second cooling unit was maintained at -55°C or less. The residual oil-containing gas was liquefied by the temperature of the second cooling unit to further collect oil.

<Experimental example>

In order to determine the composition ratio of acetone and dry ice refrigerant, which plays a key role in the performance of the second cooling unit of the present invention, the temperature of the refrigerant was measured while changing the weight-to-mass ratio of acetone and dry ice.

The graph of FIG. 4 shows the temperature of the secondary cooling unit with respect to the weight ratio of acetone and dry ice.

Referring to FIG. 4 , as the weight ratio of dry ice to acetone increases, the temperature of the refrigerant decreases rapidly. When the weight ratio of dry ice to acetone is 0.5 or more, the temperature of the refrigerant becomes about -55° C. or less and is stabilized. started to become Accordingly, the refrigerant may include the acetone and the dry ice so that the weight ratio of the dry ice to the acetone is 0.5 or more.

The graph of FIG. 5 shows the melting rate of the refrigerant with respect to the weight ratio of acetone and dry ice.

Referring to FIG. 5 , the slope of the solid dry ice melting rate graph rapidly increased until the weight ratio of acetone to dry ice was about 1:0.8, and then the slope decreased slightly, and then the weight ratio of acetone to dry ice was about 1 : From 1.2, the slope of the graph gradually softened, and the increase in the melting speed of solid dry ice also started to slow down.

Therefore, in order to reduce the time for dissolving dry ice in acetone, the refrigerant preferably contains acetone and dry ice in a ratio of about 1: 1,2 or less, preferably about 1:0.8 or less.

As such, the preferred weight ratio of acetone and dry ice, as determined through the graphs of FIGS. 4 and 5 , may be in the range of about 1:0.5 to 1:1.2, preferably about 1:0.5 to 1:0.8.

Using the oil recovery method of the present invention, the following materials can be obtained:

(a) Phenolic compounds: phenol, phenol, 2-methyl-, phenol, 4-methyl-, phenol, 2,4-dimethyl-, phenol, 3-amino-, phenol, 4-ethyl-, 4-vinyl-phenol , phenol,4-ethyl-3-methyl- and phenol,5-methoxy-2,3-dimethyl-,

(b) PAHs: 1,2-dihydronaphtho[2,1-b]furan-2-ol and 1,4-dihydronaphthalene;

(c) linear hydrocarbons: hexadec-1-ene, (E)-heptadec-8-ene, (Z)-heptadec-3-ene, nonadec-1-ene, 3-methylpentane and dodecane;

(d) nonlinear hydrocarbons: cyclotetradecane, cyclopentadecane, 4-ethyl-4'-pentylbi(cyclohexane), 3,7,7-trimethylbicyclo[4.1.0]hept-2-ene, cholesta -3,5-diene and stigmastan-3,5-diene;

(e) alcohols: 5-methyl-2-(prop-1-en-2-yl)cyclohexanol and pyridin-4-ol;

(f) aldehydes: (Z)-tetradec-9-enal, (Z)-14-methylhexadec-8-enal and (Z)-octadec-13-enal;

(g) ketones: pentadecan-2-one, 2-hydroxycyclopentadecanone, oxepan-2-thione, tetrahydropentalene-1,6(2H,6aH)-dione, 1-(pyrrolidine -1-yl) undecan-1-one, 4,5,6-trimethylpyrimidin-2 (1H)-one, octahydrodipyrrolo [1,2-a: 1 ', 2'-d] pyrazine- 5,10-dione, hexahydropyrrolo[1,2-a]pyrazine-1,4-dione, 3-methylhexahydropyrrolo[1,2-a]pyrazine-1,4-dione and (S) -5-isobutylimidazolidine-2,4-dione;

(h) acids: octanoic acid, (E)-octadec-6-enoic acid, (Z)-octadec-11-enoic acid, decanoic acid, tetradecanoic acid and palmitic acid;

(i) esters: (9E,12E)-ethyl hexadeca-9,12-dienoate, (9Z,12Z)-methyl octadeca-9,12-dienoate, (E)-methyl octadec-10 -enoate, ethyl 14-methyl-hexadecanoate and methyl palmitate,

(j) amides: (E)-N-(4-bromobenzylidene)-1,1,1-trimethylsilaneamine;

(k) amine: (E)-N-(4-bromobenzylidene)-1,1,1-trimethylsilaneamine, (l) nitrile: 3-[4-hydroxyphenyl]propionitrile;

(m) furan: 5-(hydroxymethyl)dihydrofuran-2(3H)-one and octyl(tetrahydrofuran-2-yl)methyl succinate;

(n) indole: 1H-indole and 4-methyl-1H-indole;

(p) carbohydrate-derived compounds: 2,3-anhydrous-d-mannoic acid and isosorbide;

(q) other: (Z)-7-(bromomethyl)pentadec-7-ene, 2-ethyl-3-methoxypyrazine and 3-benzylhexahydropyrrolo[1,2-b][1, 4,2,5]dioxadiazine.

Among the above substances, 5-methyl-2-(prop-1-en-2-yl)cyclohexanol, also called neoisoisofulgol, is used as a mint flavored food additive. Pyridin-4-ol is an enantiomer of 4-pyridone, and is a compound widely used in industrial fields. (Z)-Tetradec-9-enal is a fatty aldehyde and is used as a pesticide or pesticide. (Z)-14-Methylhexadec-8-enal is also a fatty aldehyde and is used as a pesticide. (Z)-octadec-13-enal is also a fatty aldehyde and is used as an attractant to attract pests.

Although the above has been described with reference to the preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can.

Claims (12)

a first step of pyrolyzing waste including biomass, plastic or textile in a reactor to produce an oil-containing gas;
a second step of cooling the oil-containing gas to a first temperature in a first cooling unit to collect the liquefied first oil in the oil;
a third step of collecting liquefied second oil by cooling the oil-containing gas discharged from the first cooling unit to a second temperature lower than the first temperature in a second cooling unit after the first oil is removed; containing,
How to recover oil from waste. According to claim 1,
The first cooling unit includes a cooling bath to which a cooler is connected and a first impinger conduit immersed in the cooling bath,
In the first step, the oil-containing gas is introduced into the first impinger conduit and cooled to -3°C to 0°C,
How to recover oil from waste. According to claim 1,
the second cooling section comprises one or more second impinger conduits disposed adjacently;
The second impinger conduit forms a cooling space, a first tube with one end sealed, and a second tube that surrounds the first tube and forms a space for accommodating a refrigerant including dry ice and acetone together with the first tube includes,
In the third step, the oil-containing gas is introduced into the second impinger conduit, characterized in that it is cooled to -55°C to -60°C,
How to recover oil from waste. 4. The method of claim 3,
The weight ratio of acetone and dry ice in the refrigerant is 1:0.5 to 1:1.2,
How to recover oil from waste. According to claim 1,
The material collected by the second cooling unit is 5-methyl-2-(prop-1-en-2-yl)cyclohexanol, pyridin-4-ol, (Z)-tetradec-9-enal , (Z)-14-methylhexadec-8-enal or (Z)-octadec-13-enal,
How to recover oil from waste. According to claim 1,
After the waste is pulverized, it is introduced into the reactor by a flowing material of an inert gas,
The pyrolysis temperature is 300 ℃ to 800 ℃, the pyrolysis temperature increase rate is 10 ℃ / min to 230 ℃ / min,
How to recover oil from waste. According to claim 1,
After the third step, injecting a solvent into the first cooling unit and the second cooling unit to collect the first oil and the second oil and further comprising the step of recovering the residual oil remaining in the inside of each cooling unit,
How to recover oil from waste. 8. The method of claim 7,
drying the residual oil at 50 to 70° C. for 20 to 28 hours,
How to recover oil from waste. According to claim 1,
After the third step, the oil collected in the opening/closing device and the oil tank additionally installed at the lower end of the second cooling unit is stored,
How to recover oil from waste. a reactor for pyrolyzing the waste to generate an oil-containing gas;
a first cooling unit cooling the oil-containing gas input from the reactor to a first temperature to collect the liquefied first oil in the oil; and
After the first oil is removed, a second cooling unit for collecting the liquefied second oil by cooling the oil-containing gas discharged from the first cooling unit to a second temperature lower than the first temperature; including,
The second cooling unit cools the oil-containing gas to -55°C to -60°C using a refrigerant containing acetone and dry ice in a weight ratio of 1:0.5 to 1:1.
A device for recovering oil from waste. 11. The method of claim 10,
a conduit through which the oil-bearing gas of the waste travels; and
It further comprises; the feedstock of the conduit into which the waste is input;
The conduit passes through the reactor, the primary cooling unit and the secondary cooling unit in order,
A device for recovering oil from waste. 12. The method of claim 11,
The feedstock further comprises a mixer therein,
A device for recovering oil from waste.

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