KR20210098036A - Regenerated fuel oil generating method and regenerated fuel oil generating device using the same - Google Patents

Abstract

The present invention relates to a method for generating a renewable fuel oil capable of extracting renewable fuel oil from synthetic resin waste among various wastes such as general or industrial waste, and a device for generating renewable fuel oil using the same, and more specifically, to a method for generating a renewable fuel oil that can minimize air pollution by extracting recycled oil by thermally decomposing synthetic resin waste at high temperatures and removing harmful gases generated during extraction and then discharging the same to the outside, and to a device for generating renewable fuel oil using the same.

Description

Regenerated fuel oil generating method and regenerated fuel oil generating device using the same

The present invention relates to a method for generating a renewable fuel oil capable of extracting recycled fuel oil from synthetic resin waste among various wastes such as general or industrial waste, and a device for generating renewable fuel oil using the same, by thermally decomposing synthetic resin waste at a high temperature and heating it. It relates to a renewable fuel oil generating method and a renewable fuel oil generating device that can minimize air pollution by extracting recycled oil, removing harmful gas generated during extraction, and then discharging it to the outside.

As interest in resource recycling increases, various methods for recycling waste are being developed. The waste emulsifier is one of these attempts, and refers to a device that pyrolyzes waste such as waste plastic or waste wire to extract liquid fuel and treat waste.

In general, when waste synthetic resin is generated, it is incinerated or landfilled. When incinerated, there is a problem that air pollutants such as dust, hydrogen chloride (HCl), sulfur oxides (SOx), nitrogen oxides (NOx), and dioxins are discharged. In the case of synthetic resin, it was difficult to decompose due to the nature of the synthetic resin, so there were problems such as soil contamination, leachate, and groundwater contamination.

Accordingly, as a method of recycling waste synthetic resins without incineration or landfill, an emulsification method capable of obtaining useful oil by thermally decomposing a thermoplastic synthetic resin that can be thermally decomposed is known, and research and development of the device is being actively conducted.

A conventional apparatus for generating renewable fuel oil includes a heating furnace for accommodating waste and a heating device for heating the heating furnace. In the heating furnace, when the waste synthetic resin is put into the furnace and then the inside of the furnace is heated to 300°C to 600°C through a separate heating device, the waste synthetic resin is dissolved and vaporized. During thermal decomposition, gaseous fuel is discharged to the outside. When the gaseous fuel discharged in this way is liquefied through a cooling device, it corresponds to a device capable of obtaining liquid fuel.

However, the conventional renewable fuel oil generating device is not equipped with a device for processing the gas generated when heating waste through a heating furnace, so it is treated as a major cause of odor generation and environmental pollution, so it is very difficult to install an emulsification facility. I cried.

In addition, as the waste synthetic resin is dissolved, soot is generated very severely, and as the gaseous fuel contains soot, carbon, etc. and is discharged, a separate process such as removal of impurities from the liquefied fuel is further required.

Therefore, it is possible to effectively remove soot generated during dissolution of the waste synthetic resin, minimize environmental pollution by treating odors and harmful gases, and further improve the recovery rate of oil recovered from the waste synthetic resin. There is a need to develop a generator.

1. Korea Patent No. 10-0919104 'Waste Emulsifying Device' (application date: 2009.06.18) 2. Registered Utility Model Publication No. 20-0165579 'Plastic waste emulsifying device' (application date 1999.07.20) 3. Korea Patent No. 10-0675909 'Pyrolysis and emulsification apparatus and method for synthetic resin waste' (application date 2006.09.26)

The present invention has been devised to solve the above problems, and it is possible to recover renewable fuel oil by pyrolyzing waste synthetic resins produced in various fields, and to minimize environmental pollution by treating harmful gases generated during thermal decomposition. An object of the present invention is to provide an oil generating device.

In addition, the present invention can control the temperature of the heating furnace so that only a specific waste synthetic resin can be melted, and thus the regenerated oil extracted from the waste synthetic resin having a different thermal decomposition temperature can be separated and extracted, improving the oil purification efficiency and extraction Provided is a method for generating renewable fuel oil that can minimize impurities in the used oil.

The method for generating renewable fuel oil for extracting renewable fuel oil using the renewable fuel oil generating device 1000 for thermally decomposing the waste synthetic resin of the present invention includes a waste input step (S100) of injecting the waste synthetic resin into the heating furnace 1100; a steam discharging step (S200) of raising the temperature of the heating furnace 1100 to 100 to 150° C. and discharging the steam generated inside the heating furnace 1100 to the outside; Toxic gas discharge step (S300) for discharging the harmful gas generated inside the heating furnace to the outside by raising the temperature of the heating furnace (1100) to 200 ~ 300 ℃; a pyrolysis step of pyrolyzing the waste synthetic resin to extract gaseous extraction gas (S400); and a recovery step (S500) of cooling the extracted extracted gas and recovering it as liquid renewable fuel oil.

In the present invention, a gas input step (S600) of introducing an inert gas to maintain the pressure range inside the heating furnace 1100 when performing the step of discharging water vapor, harmful gas, and extraction gas is further performed. do it with

The thermal decomposition step (S400) of the present invention is a first gas extraction step (S410) of extracting a first gas by maintaining the temperature inside the heating furnace 1100 at 350 to 400° C.; and the heating furnace 1100 inside A second gas extraction step (S420) of extracting the second gas by maintaining the temperature of 400 ~ 450 °C; characterized in that it is further performed.

The apparatus for generating renewable fuel oil used in the method for generating renewable fuel oil of the present invention includes: a heating furnace 1100 into which a waste synthetic resin is put, and for pyrolyzing the input waste synthetic resin to extract gaseous extraction gas; a second heat exchange unit 1500 for condensing the extracted gas so that the extracted gas is separated into liquid renewable fuel oil and gaseous exhaust gas; A gas suction unit 1800 that is connected to the inside of the heating furnace 1100 and operates at an arbitrarily set temperature so as to suck the water vapor generated before the generation of the extraction gas in the heating furnace 1100 and discharge it to the outside; characterized.

In the present invention, a gas supply unit 1900 for supplying an inert gas into the heating furnace 1100 in order to maintain a constant pressure inside the heating furnace 1100; characterized in that it further comprises.

In addition, according to the present invention, the extraction gas is separated and extracted into a first extraction gas and a second extraction gas according to the thermal decomposition temperature of the waste synthetic resin, and the second heat exchange unit 1500 divides the first gas and the second gas. to be divided into a first condensing pipe 1510 receiving the first extraction gas and a second condensing pipe 1520 receiving the second extraction gas to be condensed, the first condensing pipe 1510 and the second condensing pipe 1520 is characterized in that only one is selectively opened according to the temperature of the heating furnace (1100).

The heating furnace 1100 of the present invention includes a receiving tank 1110 having a hollow inside so that a waste synthetic resin is put therein; an outer case 1120 surrounding the accommodating tank 110; The upper end of the outer case 1120 includes at least one opening/closing means 1130 so that a part of the accommodation tank 1110 is exposed to the air.

In the receiving tank 1110 of the present invention, an inlet 1111 is formed so that the waste synthetic resin is put in, and the outer case 1120 has a tank door 1140 for opening and closing the inlet 1111; The inlet 1111 has a blocking cover 1150 for blocking the discharge of the residue remaining inside the accommodation tank 1110 when the tank door 1140 is opened; characterized in that it is further provided.

According to the present invention, the melting and vaporization of the waste synthetic resin proceeds simultaneously in one heating furnace, and the temperature and pressure of the heating furnace can be adjusted, so that it is possible to extract renewable fuel oil from a specific waste synthetic resin having a different thermally decomposed temperature, and the extracted renewable fuel There is an advantage that oil can be stored separately.

In addition, a gas treatment unit that can filter air pollutants such as hydrogen chloride (HCl), sulfur oxide (SOx), nitrogen oxide (NOx) contained in harmful gas generated during thermal decomposition (melting) of waste synthetic resin is additionally installed. Air pollution can be prevented, and a separate cooling device for rapid cooling of the heating furnace is provided, so that the continuity of the operation can be rapidly progressed.

1 is a flow chart showing the sequence of the method for generating renewable fuel oil of the present invention.
Figure 2 is a table showing an embodiment of the extraction temperature and time of water vapor, harmful gas, first and second gas of the present invention.
3 is a schematic diagram showing the main configuration of the apparatus for generating renewable fuel oil of the present invention.
Figure 4 is a schematic diagram showing the configuration of the gas intake portion of the present invention.
5 is a schematic view showing an embodiment of the heat exchanger of the present invention.
6 is a schematic view showing the configuration and an embodiment of the gas processing unit of the present invention.
7 is a schematic view showing an embodiment of the cooling water circulation structure of the present invention.
Figure 8 is a partial perspective view showing an embodiment of the heating furnace of the present invention.
9 is a cross-sectional view showing another embodiment of the heating furnace of the present invention.
10 is a perspective view showing the main configuration of the filter of the present invention.
11 is a partial cross-sectional view showing the internal configuration of the filter of the present invention.

Hereinafter, an embodiment of the method for generating renewable fuel oil according to the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1 , the present invention relates to a renewable fuel oil generating method for extracting renewable fuel oil using a renewable fuel oil generating device 1000 that pyrolyzes waste synthetic resin.

The above waste synthetic resin corresponds to a mixture of a thermosetting resin and a thermoplastic resin, and when the waste synthetic resin containing PVC is thermally decomposed, highly corrosive hydrogen chloride gas is generated. Due to this, the present invention can treat harmful gas containing hydrogen chloride generated in the pyrolysis process, so that it can be said to be an eco-friendly resource circulation.

Renewable fuel oil generation method using the renewable fuel oil generating device 1000 of the present invention is a waste input step (S100), a water vapor discharge step (S200), a harmful gas discharge step (S300), a pyrolysis step (S400) and a recovery step (S500). At this time, the renewable fuel oil generating device 1000 includes a heating furnace 1100 into which the waste synthetic resin is input.

1 and 2, the steam discharging step (S200) is a heating furnace 1100 by heating the heating furnace 1100 to 100 ~ 150 ℃ after performing the waste input step (S100) of putting the waste synthetic resin inside the heating furnace 1100. (1100) The water vapor generated inside is discharged to the outside. That is, when the waste synthetic resin is melted and pyrolyzed, the water vapor contained in the waste synthetic resin is vaporized. At this time, by removing the vaporized water vapor, the quality of the generated renewable fuel oil can be further improved. By maintaining the internal temperature of the heating furnace 1100 at 100 to 150° C. for a certain period of time, the waste synthetic resin is not thermally decomposed, and only water vapor contained in the waste synthetic resin can be vaporized.

The harmful gas discharge step (S300) has the purpose of removing the harmful gas containing hydrogen chloride generated while the chlorine-containing plastic contained in the waste synthetic resin is melted or pyrolyzed. When the heating furnace 1100 is heated to 200~300℃, the plastic (PVC) containing chlorine is melted in the waste synthetic resin and the C-Cl bond is broken and the primary pyrolysis occurs, and harmful substances such as hydrogen chloride (HCl) gas and aromatics gas is produced At this time, it is preferable to purify the generated noxious gas and then discharge it to the atmosphere.

In the thermal decomposition step (S400), the temperature inside the heating furnace 1100 is raised to 300° C. or more to thermally decompose the waste synthetic resin to extract gaseous extraction gas.

Waste synthetic resin is pyrolyzed in the order of PVC (primary pyrolysis) > PVC (secondary pyrolysis) > PP (polypropylene) > PE (polyethylene). PVC undergoes primary pyrolysis at 200 to 250° C. in the step of discharging harmful gases (S300), and secondary pyrolysis at 350 to 400° C. in the pyrolysis step (S400). Since PP is pyrolyzed at 328-410°C and PE is pyrolyzed at 335-450°C, it is pyrolyzed in the pyrolysis step (S400). Therefore, it is preferable that the regenerated fuel oil extraction heating temperature in the thermal decomposition step of thermally decomposing the waste synthetic resin is in the range of 350°C to 450°C.

If the heating temperature during thermal decomposition is lower than 350 ° C, the polyethylene contained in the waste synthetic resin is difficult to thermally decompose. Therefore, the above heating temperature must be observed.

The recovery step (S500) corresponds to the step of cooling the extracted extracted gas to recover the liquid renewable fuel oil. Before cooling the extracted gas, impurities (carbon, tar, etc.) contained in the extracted gas are removed and then cooled and liquefied. At this time, other gases that are not liquefied may be discharged into the atmosphere after purification.

On the other hand, in order to maintain the pressure range inside the heating furnace 1100 when performing the steam discharge step (S200), the harmful gas discharge step (S300), and the pyrolysis step (S400) of discharging water vapor, harmful gas, and extraction gas, an inert gas is used. A gas input step (S600) of inputting may be further performed. The inert gas may preferably be nitrogen (N2). The inert gas may be supplied before being heated after the waste synthetic resin is put into the heating furnace 1100 to be substituted with the air remaining in the heating furnace 1100 .

The thermal decomposition step (S400) is a first gas extraction step (S410) of extracting the first gas by maintaining the temperature inside the heating furnace 1100 at 350 ~ 400 ℃ and the temperature inside the heating furnace 1100 of 400 ~ 450 ℃ and a second gas extraction step (S420) of extracting the second gas by maintaining it. When the first gas and the second gas are cooled and liquefied, respectively, renewable fuel oil having different purities can be produced.

Recycled fuel oil extracted from the first gas is extracted from PVC. The first gas extraction step 410 corresponds to the secondary pyrolysis step of PVC. That is, the conventional PVC regenerated fuel oil due to the thermal decomposition of conventional PVC contains a large amount of Cl component in oil, so a separate Cl removal process must be performed. , After removing the Cl component contained in PVC in the primary pyrolysis process, renewable fuel oil is extracted in the secondary pyrolysis process.

Recycled fuel oil extracted from the second gas is extracted from synthetic resins excluding PVC such as PP, PE, and PS. It shows the same characteristics as gasoline, kerosene, diesel, heavy oil, and wax powder, and is suitable for industrial fuel oil rather than gasoline. Therefore, since the properties and physical properties of the renewable fuel oil extracted from the first gas and the second gas are different from each other, there is an advantage that the renewable fuel oil can be used according to each characteristic.

Hereinafter, an embodiment of the apparatus 1000 for generating renewable fuel oil of the present invention will be described with reference to the drawings.

Referring to FIG. 3 , the apparatus for generating renewable fuel oil of the present invention has a heating furnace 1100 . The heating furnace 1100 is put into the waste synthetic resin. The heating furnace 1100 is hollow inside, and an inlet 1111 into which the waste synthetic resin can be put is formed on one side. The waste synthetic resin injected into the heating furnace 1100 is pyrolyzed, and the gaseous extract gas generated while pyrolyzed is extracted.

In order to thermally decompose the waste synthetic resin accommodated in the heating furnace 1100, a heating unit 1200 is provided at the lower end of the heating furnace 1100 to heat the heating furnace 1100. The heating unit 1200 may be a gas burner using LPG, LNG, or the like.

Referring to FIG. 3 , a filter 1300 receiving the extracted gas extracted from the heating furnace 1100 is further provided. The filter 1300 is positioned at the upper end of the heating furnace 1100 to receive the extraction gas from the heating furnace 1100 . Accordingly, as the extract gas passes through the filter 1300 , impurities contained in the extract gas are adsorbed into the inner space of the filter 1300 to remove impurities contained in the extract gas.

10 and 11 , the filter 1300 may include a filter case 1310 , a partition plate 1320 , an adsorption unit 1330 , and a tar cover 1340 .

The filter case 1310 is erected in the vertical direction and has a hollow cylindrical tube shape. The extract gas is received from the lower side of the filter case 1310, impurities are removed, and the extract gas is discharged to the upper side.

The partition plate 1320 has the purpose of partitioning the inside of the filter case 1310 at regular intervals, and a plurality of through-holes 1321 through which the extraction gas moves may be formed in the partition plate 1320 .

The adsorption unit 1330 may be provided in plurality, and has a gas pipe 1331 extending upward along the through hole 1321 and a gas cover 1332 spaced apart from the upper end of the gas pipe 1331 . The extraction gas passes through the gas pipe 1331 and the movement path of the gas cover 1332 may increase. At this time, impurities may be adsorbed on one surface of the gas cover 1332 in contact with the extraction gas.

The tar cover 1340 is installed to be spaced apart from any one of the through holes 1321 of the through holes 1321 . This means that when the extraction gas passes through the filter case 1310, the tar contained in the extraction gas does not continuously remain on the upper surface of the partition plate 1320, but rather along the through hole 1321 where the tar cover 1340 is located. To be able to flow down to the other compartment plate 1320 located. Therefore, a large amount of tar can be collected in the partition plate 1320 located at the lowermost stage, and there is an advantage in that the collected tar can be batch-processed when cleaning or replacing the filter 1330 .

At this time, the tar cover 1340 is preferably located on the same vertical line inside the filter 1300, that is, in the center of the partition plate 1320. Due to this, when the tar passes through the through hole 1321 and flows down to another space located below, it falls on the upper surface of the tar cover 1340 . The tar cover 1340 is preferably formed to maintain an inclination at a certain angle so that the fallen tar can flow down well.

Referring to FIG. 3 , a first heat exchange unit 1400 for receiving the extracted gas from which impurities have been removed from the filter 1300 and cooling the extracted gas to a predetermined temperature is further provided. The first heat exchange unit 1400 cools the extracted gas to a predetermined temperature in order to prevent ignition and danger as the extracted gas from which impurities are removed maintains a high temperature.

Thereafter, a second heat exchange unit 1500 receiving the extracted gas cooled from the first heat exchange unit 1400 is further provided. The second heat exchange unit 1500 cools and condenses the extracted gas so that the extracted gas is separated into liquid renewable fuel oil and gaseous exhaust gas. The exhaust gas refers to the residual gas that is not condensed from the extracted gas to the renewable fuel oil, and the residual gas is purified and discharged to the outside. By providing the first heat exchange unit 1400 and the second heat exchange unit 1500 , it is possible to reduce the risk of ignition of the extracted gas and increase the liquefaction efficiency of the extracted gas.

Referring to FIG. 3 , a receiving tank 1600 receiving liquid renewable fuel oil and exhaust gas from the second heat exchange unit 1500 is further provided. The receiving tank 1600 cools and stores the renewable fuel oil to a predetermined temperature, and discharges the exhaust gas to the outside.

A plurality of storage tanks 1700 for receiving and storing the cooled renewable fuel oil from the receiving tank 1600 are further provided.

Meanwhile, referring to FIG. 4 , a gas suction unit 1800 for sucking in water vapor generated before generating the extraction gas in the heating furnace 1100 and discharging it to the outside is further provided. The gas suction unit 1800 is connected to the inside of the heating furnace 1100 and operates when the heating furnace 1100 reaches an arbitrarily set temperature, about 120 to 150° C., to suck vapor vaporized inside the heating furnace 1100 .

For this reason, it is possible to improve the quality of the renewable fuel oil by preventing the inclusion of water in the extracted gas during extraction of the extracted gas.

3 and 4, when the gas suction unit 1800 operates and the pressure inside the heating furnace 1100 is lowered, a gas supply unit 1900 for supplying an inert gas into the heating furnace 1100 to compensate for this. may be further provided. The inert gas supplied from the gas supply unit 1900 may preferably be nitrogen.

On the other hand, the heating furnace 1100 is provided with respective sensors for measuring the temperature, pressure, and humidity inside the heating furnace 1100, and based on the measured data, the heating unit 1300 and the gas suction unit 1800 and The gas supply unit 1900 is controlled.

Referring to FIG. 3 , the extraction gas is separated and extracted into a first extraction gas and a second extraction gas according to the thermal decomposition temperature of the waste synthetic resin, and the temperature for extracting the first gas and the second gas is the above-mentioned temperature and same.

At this time, in the second heat exchange unit 1500 , a first condensing pipe 1510 receiving the first gas and a second condensing pipe 1520 receiving the second gas to separate and condense the first gas and the second gas. can be divided into

Therefore, the first condensing pipe 510 and the second condensing pipe 520 are selectively opened depending on the temperature inside the heating furnace 1100 to separate the renewable fuel oil generated from the first and second gases, respectively. can be built and created. At this time, if the receive tank 1600 and the storage tank 1700 are formed in plurality so that they can be respectively connected to the first condensing pipe 1510 and the second condensing pipe 1520, the generated renewable fuel oil can be stored separately. .

Referring to FIG. 5 , in an embodiment, a third heat exchange unit 1500 ′ may be further provided. That is, the first gas may be delivered to the second heat exchange unit 1500 to be liquefied, and the second gas may be delivered to the third heat exchange unit 1500 ′ to be liquefied in a parallel configuration. Accordingly, it is possible to further improve the extraction efficiency of the renewable fuel oil that can be extracted from the first and second gases.

Referring to FIG. 6 , a gas processing unit 2000 for the purpose of purifying and discharging harmful gases generated while the waste synthetic resin is thermally decomposed before extraction of the extraction gas is further provided. The gas processing unit 2000 includes a cooling unit 2100 for primarily cooling the high-temperature harmful gas. The harmful gas is usually hydrogen chloride (HCl), and the gas processing unit 2000 contains a sodium hydroxide (NaOH) solution reacting with hydrogen chloride. Therefore, hydrogen chloride and sodium hydroxide solution react with each other, and perform a desalination process to produce water (H 2 O) and sodium chloride (NaCl).

On the other hand, a 3-way valve for controlling the movement path of the discharge of water vapor, harmful gas, and extraction gas is provided in the movement line of each gas to move each gas for each purpose.

Referring to FIG. 7 , a condenser 1550 for cooling each of the heat exchangers and a cooling water storage tank 1560 for storing cooling water are further provided, and the cooling water can circulate to cool each heat exchanger.

Referring to FIG. 8 , the heating furnace 1100 may include an accommodation tank 1110 , an outer case 1120 , and an opening/closing means 1130 .

The receiving tank 1110 is hollow inside so that the waste synthetic resin is put therein, and an inlet 111 is formed on one side so that the waste synthetic resin is put therein.

The outer case 1120 has a structure surrounding the receiving tank 1110, and the heating unit 200 is positioned at the lower end. The outer case 1120 insulates the remaining portion except for the upper side of the receiving tank 1110 using a fire brick or a thermal barrier wall. For this reason, the heating unit 1200 can intensively heat the lower side of the receiving tank 1110 .

Referring to FIG. 9 , the opening/closing means 1130 is provided at the upper end of the outer case 1200 . The opening/closing means 1130 is provided to rapidly cool the receiving tank 1110 in order to quickly perform the next process when the operation of the heating unit 1200 is stopped. That is, when the heating furnace 1100 is heated, the opening/closing means 1130 seals the outer case 1200 to increase the heating efficiency, and when the heating furnace 1100 is cooled, it is opened to expose a part of the accommodation tank 110 to the air. As a result, the cooling efficiency can be further increased.

Accordingly, the inner side of the outer case 1120 can be divided into a heating space S1 for heating the heating furnace 1100 and a cooling space S2 for cooling the heating furnace 1100 by contacting air.

The opening/closing means 1130 may include an opening/closing door 1131 having one side rotationally coupled to the outer case, and a driving unit 1132 connected to the opening/closing door 1131 to provide power to rotate the opening/closing door 1131 .

And, the outer case 1120 is further provided with a tank door 1140 for opening and closing the inlet 1111.

At this time, referring to FIG. 8 , the inlet 1111 is further provided with a blocking cover 1150 for blocking the discharge of the residue remaining in the receiving tank 1110 when the tank door 1140 is opened.

The blocking cover 1150 has a hemispherical shape, and a handle that can be gripped by a user is further provided on one side. A coupling groove 1151 may be formed at the edge of the blocking cover 1150 , that is, at the edge of the blocking cover 1150 in contact with the inner surface of the receiving tank 1110 .

In addition, a coupling protrusion 1112 corresponding to the coupling groove 1151 is formed to protrude from the receiving tank 1110 . As a result, the coupling groove 1151 of the blocking cover 1150 is fitted into the coupling protrusion 1112 , and the blocking cover 1150 is mounted on the receiving tank 1110 . Due to the coupling groove 1151 and the coupling protrusion 1112 , it is possible to prevent the waste synthetic resin residue from leaking into the contact portion between the blocking cover 1150 and the receiving tank 1110 .

The present invention according to such a configuration has the advantage that thermal decomposition (melting) and vaporization of the waste synthetic resin are simultaneously performed in one heating furnace, and the extraction of renewable fuel oil having different characteristics is possible.

1000: renewable fuel oil generator 1100: heating furnace
1500: second heat exchange unit 1800: gas intake unit
1900: gas supply unit

Claims (8)

In the renewable fuel oil generation method for extracting renewable fuel oil using the renewable fuel oil generating device 1000 that pyrolyzes waste synthetic resin,
Waste input step (S100) of putting the waste synthetic resin into the heating furnace 1100;
a steam discharging step (S200) of raising the temperature of the heating furnace 1100 to 100 to 150° C. and discharging the steam generated inside the heating furnace 1100 to the outside;
Toxic gas discharge step (S300) of heating the heating furnace (1100) to 200 ~ 300 ℃ to discharge the harmful gas generated inside the heating furnace to the outside;
a pyrolysis step of pyrolyzing the waste synthetic resin to extract gaseous extraction gas (S400);
Renewable fuel oil generating method comprising a; a recovery step (S500) of cooling the extracted extracted gas and recovering it as liquid renewable fuel oil. The method of claim 1,
Renewable fuel oil, characterized in that the gas input step (S600) of injecting an inert gas to maintain the pressure range inside the heating furnace 1100 when performing the discharge step of the steam, harmful gas, and extraction gas; creation method. The method of claim 1,
The thermal decomposition step (S400) is a first gas extraction step (S410) of extracting the first gas by maintaining the temperature inside the heating furnace 1100 at 350 ~ 400 ℃; and
A second gas extraction step (S420) of extracting a second gas by maintaining the temperature inside the heating furnace 1100 at 400 to 450° C.; Renewable fuel oil generating method, characterized in that it is further performed. [Claim 4] The apparatus for generating renewable fuel oil used in the method for generating renewable fuel oil according to any one of claims 1 to 3,
a heating furnace 1100 into which the waste synthetic resin is put, and for pyrolyzing the input waste synthetic resin to extract gaseous extraction gas;
a second heat exchange unit 1500 for condensing the extracted gas so that the extracted gas is separated into liquid renewable fuel oil and gaseous exhaust gas;
a gas suction unit 1800 that is connected to the inside of the heating furnace 1100 and operates at an arbitrarily set temperature so as to suck the water vapor generated before generating the extraction gas in the heating furnace 1100 and discharge it to the outside;
Renewable fuel oil generating device, characterized in that it is further provided. 5. The method of claim 4,
a gas supply unit 1900 for supplying an inert gas into the heating furnace 1100 to maintain a constant pressure inside the heating furnace 1100;
Renewable fuel oil generating device, characterized in that it further comprises. 5. The method of claim 4,
According to the thermal decomposition temperature of the waste synthetic resin, the extraction gas is separated and extracted into a first extraction gas and a second extraction gas,
The second heat exchange unit 1500 includes a first condensing pipe 1510 receiving the first extraction gas to separately condense the first gas and the second gas and a second condensing pipe receiving the second extraction gas ( 1520), but
Renewable fuel oil generating apparatus, characterized in that only one of the first condensing pipe 1510 and the second condensing pipe 1520 is selectively opened according to the temperature of the heating furnace (1100). 5. The method of claim 4,
The heating furnace 1100 includes a receiving tank 1110 having a hollow inside so that the waste synthetic resin is put therein;
an outer case 1120 surrounding the accommodating tank 110;
Renewable fuel oil generating apparatus, characterized in that it comprises a; at the upper end of the outer case (1120), at least one opening/closing means (1130) so that a part of the receiving tank (1110) is exposed to the air. 8. The method of claim 7,
The receiving tank 1110 has an inlet 1111 formed so that the waste synthetic resin is put in, and the outer case 1120 includes a tank door 1140 that opens and closes the inlet 1111;
Regeneration characterized in that the inlet 1111 is further provided with a blocking cover 1150 for blocking the discharge of the residue remaining inside the receiving tank 1110 when the tank door 1140 is opened. fuel oil generator.

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