Light oil separation system

Abstract

The present invention relates to a light oil separation system. The purpose of the present invention is to separate light oil from pyrolysis oil generated by pyrolysis, to enable continuous production of pyrolysis oil products having a required flash point, thereby enhancing product competitiveness. For this purpose, the present invention comprises: a preheater which receives pyrolysis oil from a pyrolysis oil reduction apparatus and preheats the pyrolysis oil; a heater which heats the pyrolysis oil preheated through the preheater, to induce the removal of light oil from the pyrolysis oil through volatilization; a boiler which circulates heated water in each of the preheater and the heater to support preheating or heating of the pyrolysis oil; a condenser which receives the light oil removed from the pyrolysis oil through the heater and condenses same; a light oil storage unit configured to store the light oil condensed through the condenser; a cooler which receives the pyrolysis oil from which the light oil has been removed in the heater and supports the pyrolysis oil to cool it down; at least one filter which filters the pyrolysis oil cooled by the cooler, to obtain high-purity pyrolysis oil; a pyrolysis oil storage tank which stores the pyrolysis oil filtered through the filter; and a cooling water supply unit which circulates cooling water in each of the condenser and the cooler to support cooling of the pyrolysis oil or the light oil.

Description

Light oil separation system

[0001] The present invention relates to a light oil separation system, and more particularly, to a light oil separation system that enhances product competitiveness by separating light oil from pyrolysis oil produced by pyrolysis to enable continuous production of pyrolysis oil products having a required flash point.

[0002] In general, plastics are materials that can be formed by heating, pressurizing, or both, or resin products made from such materials. Typically, plastics refer to synthetic resins. While the final product is solid and has a high molecular weight, they possess fluidity during molding, making them easy to mold and produce products of various shapes. Furthermore, since plastics are manufactured into polymers by polymerizing various substances using petroleum as the main raw material, users can polymerize substances with desired properties to produce polymer compounds with diverse functions and properties, and their applications and usage are rapidly increasing. Furthermore, plastics, a type of petroleum compound that uses petroleum as the main raw material, are manufactured into polymers. Therefore, they are difficult to decompose, have excellent corrosion resistance, and can be used for long periods of time. They are easy to mold, allowing for the production of various shapes. Furthermore, their light weight allows them to be used in a variety of applications, from household goods to various industrial products. Consequently, their usage is rapidly increasing.

[0003] However, waste plastic discarded after use has the characteristic of being difficult to decompose, making it difficult to landfill, and when incinerated, various harmful gases are emitted, polluting the atmospheric environment, making it difficult to dispose of waste plastic.

[0004] Additionally, as the reserves of oil, including petroleum, which is the fuel used to produce waste plastic, decrease, the price of oil increases, and as resources are depleted, the need to reuse the oil present in waste plastic is increasing.

[0005] Accordingly, a waste plastic pyrolysis oil reduction device has recently been developed that reduces and recovers the pyrolysis oil contained within waste plastic to increase the resource recyclability.

[0006] A pyrolysis oil reduction device (1) for obtaining pyrolysis oil from conventional waste plastic, as illustrated in FIG. 1, comprises a decomposition furnace (2) for receiving waste plastic, heating it to a certain temperature, for example, 300 to 800°C, and pyrolyzing it to form a liquid resin, a transport means (3) provided on one side of the decomposition furnace (2) for transporting the liquid resin, and a purification unit (4) for receiving the liquid resin transported through the transport means (3) and refining it to obtain pyrolysis oil.

[0007] In addition, the above-mentioned decomposition furnace (2) rotates in place to ensure smooth melting of waste plastic contained inside.

[0008] In addition, a piping structure (5) is configured between the decomposition furnace (2) and the transport means (3) to support the transport of liquid resin through the transport means (3) without interference with the rotating decomposition furnace (2).

[0009] However, the conventional pyrolysis oil reduction device does not provide a separate system for obtaining light oil having a required flash point from the pyrolysis oil obtained from waste plastic, and therefore, there is a problem in that continuous pyrolysis oil cannot be produced from waste plastic, and thus the production efficiency is lowered, such as a decrease in the production amount of pyrolysis oil.

[0010] In order to solve the above problems, the purpose of the present invention is to provide a light oil separation system that enhances product competitiveness by separating light oil from pyrolysis oil produced by pyrolysis and enabling continuous production of pyrolysis oil products having a required flash point.

[0011] In order to achieve the above object, the present invention comprises: a preheater which receives pyrolysis oil from a pyrolysis oil reduction device and preheats it; a heater which heats the pyrolysis oil preheated through the preheater to induce light oil to be removed from the pyrolysis oil through volatilization; a boiler which supports preheating or heating the pyrolysis oil by circulating heating water through each of the preheater and the heater; a condenser which receives light oil removed from the pyrolysis oil through the heater and condenses it; a light oil storage unit configured to store the condensed light oil through the condenser; a cooler which receives pyrolysis oil from which light oil has been removed from the heater and supports it so as to cool it; at least one filter which filters the pyrolysis oil cooled through the cooler to obtain high-purity pyrolysis oil; a pyrolysis oil storage tank which stores the pyrolysis oil filtered through the filter; And it is characterized by including a cooling water supply unit that circulates cooling water to each of the condenser and cooler to support cooling of the thermal cracking oil or light oil.

[0012] In the present invention, the preheater preferably includes: a chamber having a circulation space formed therein, a first inlet pipe for supporting pyrolysis oil to enter the circulation space at one side, and a first discharge pipe formed at a position corresponding to the first inlet pipe for discharging pyrolysis oil preheated in the circulation space; a circulation pipe formed in the circulation space of the chamber, the circulation pipe including a second inlet pipe for receiving heated water provided through a boiler at one side, and a second discharge pipe for supporting the heated water to re-enter the boiler at the other side; a plurality of partition walls formed in the circulation space of the chamber, the plurality of partition walls being formed close to the first inlet pipe and the first discharge pipe to support the pyrolysis oil to exchange heat with the circulation pipe between the first inlet pipe and the first discharge pipe; and at least one retention partition formed between the plurality of partition walls to delay the movement of the pyrolysis oil from the first inlet pipe to the first discharge pipe, thereby increasing the contact time with the circulation pipe and improving the heat exchange efficiency.

[0013] In the present invention, the heater comprises: a heating chamber having a third inlet pipe having a heating space of a predetermined size formed therein and receiving pyrolysis oil on one side; a third discharge pipe configured to correspond to the third inlet pipe and supporting the pyrolysis oil from which light oil has been removed so that it can enter a cooler; and a fourth inlet pipe configured to support the light oil volatilized by heating in the heating space so that it can enter on the other side; a heating pipe configured to be formed within the heating chamber and supporting the introduction of heating water on one side; and a fourth discharge pipe configured at a position corresponding to the fifth inlet pipe and supporting the re-entry of the heating water into the boiler after circulating in the heating space; a stirring unit configured in the heating space of the heating chamber to increase the contact area of ​​the pyrolysis oil with the heating pipe and thereby induce the pyrolysis oil to be evenly heated, thereby improving the separation efficiency of light oil from the pyrolysis oil; a retention pipe configured to retain the light oil discharged through the fourth discharge pipe and filter out foreign substances; And it is preferable to include a filtering unit configured at one end of the above-mentioned retention pipe to filter light oil and induce discharge of high-purity light oil with a low flash point.

[0014] According to the present invention, by separating light oil from pyrolysis oil produced by pyrolysis, continuous production of pyrolysis oil products having a required flash point is possible, thereby enhancing product competitiveness.

[0015] Figure 1 is a schematic diagram of a conventional pyrolysis oil reduction device.

[0016] Figure 2 is a configuration diagram of a light oil separation system according to the present invention.

[0017] Figure 3 is a configuration diagram of a preheater according to the present invention.

[0018] Figure 4 is a configuration diagram of a heater according to the present invention.

[0019] Figure 5 is a configuration diagram of a retention tube and a filter unit according to the present invention.

[0020] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined by the description of the claims.

[0021] Meanwhile, the terminology used in this specification is for the purpose of describing embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise. As used herein, "comprises" and / or "comprising" do not exclude the presence or addition of one or more other components, steps, operations, and / or elements to the mentioned components, steps, operations, and / or elements. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0022]

[0023] The light oil separation system of the present invention receives pyrolysis fluid generated through a pyrolysis oil reduction device (1), separates light oil from the pyrolysis oil, and enables continuous production of a pyrolysis oil product having a required flash point.

[0024] The above light oil separation system, as shown in FIG. 2, may be configured to include a preheater (10), a heater (20), a boiler (30), a condenser (40), a light oil storage unit (50), a cooler (60), a filter (70), a pyrolysis oil storage tank (80), and a cooling water supply unit (90).

[0025] The above preheater (10) receives pyrolysis oil provided through the pyrolysis oil reduction device (1) and heats it to a certain temperature, thereby activating the pyrolysis oil.

[0026] The above preheater (10) may include a chamber (110), a circulation pipe (120), a partition wall (130), and a retention partition wall (140), as shown in FIG. 3.

[0027] The chamber (110) forms a circulation space (112) inside so that the pyrolysis oil is preheated by maintaining the pyrolysis oil at a constant temperature through mutual exchange of heating water and pyrolysis oil.

[0028] In addition, the chamber (110) includes a first inlet pipe (114) configured on one side to support the pyrolysis oil provided from the pyrolysis oil reduction device (1) so that it can enter the chamber (110).

[0029] In addition, the chamber (110) includes a first discharge pipe (116) configured on the other side to support the pyrolysis oil circulating in the circulation space (112) so that it can be discharged to the outside.

[0030] The above circulation pipe (120) is configured in the circulation space (112) of the chamber (110) and supports the heating water provided through the boiler (30) to circulate in the circulation space (112).

[0031] In addition, the circulation pipe (120) includes a second inlet pipe (122) configured on one side of the chamber (110) so that heated water can be supplied to one end of the circulation pipe (120).

[0032] In addition, the circulation pipe (120) includes a second discharge pipe (124) configured on the other side of the chamber (110) so that heated water can be discharged to the other end of the circulation pipe (120).

[0033] In addition, the partition wall (130) is configured in the circulation space (112) of the chamber (110), and is configured at each of the adjacent positions of the first inlet pipe (114) and the first discharge pipe (116), so as to limit the space so that the heated water is not circulated throughout the circulation space (112) of the chamber (110), and the pyrolysis oil that has entered the first inlet pipe (114) can be discharged through the first discharge pipe (116). As in the past, when the pyrolysis oil is circulated throughout the circulation space (112), the preheating efficiency is lowered due to the extensive heat exchange between the heated water and the pyrolysis oil, and when the heat exchange between the heated water and the pyrolysis oil occurs in the space limited by the partition wall (130), the preheating efficiency is improved due to the heat exchange in the limited space.

[0034] The above retention partition (140) is configured within the partition (130) to delay contact between the pyrolysis oil entering the first inlet pipe (114) and the circulation pipe (120) during the process of being discharged through the first discharge pipe (116), thereby further improving the preheating efficiency of the pyrolysis oil.

[0035] In this case, the above-mentioned retention barriers (140) are configured in multiple numbers at regular intervals in the circulation space (112) of the chamber (110).

[0036] In addition, the above retention barrier (140) may include an outlet hole (142) that is formed alternately to sequentially allow heated water to enter the retention barriers (140) formed in a plurality of formations and to induce retention.

[0037] The above-mentioned outlet hole (142) is formed on one side of the retention partition wall (140) and is formed to a certain size so that the pyrolysis oil can enter the next stage. For example, a plurality of retention partition walls (140) are formed at a certain interval between the partition walls (130), and the outlet hole (142) is formed at the bottom of the retention partition wall (140) formed at one end and the outlet hole (142) is formed at the top of the retention partition wall (140) located in the next order, thereby forming them alternately, thereby delaying the contact time of the pyrolysis oil with the circulation pipe (120) as much as possible and improving the preheating efficiency due to heat exchange.

[0038] The above heater (20) receives pyrolysis oil preheated from the preheater (10) and heats it to a constant temperature.

[0039] The above heater (20) may include a heating chamber (210), a heating pipe (220), a stirring unit (230), a retention pipe (240), and a filter unit (250), as shown in FIG. 4.

[0040] The above heating chamber (210) forms a heating space (212) inside so that light oil is volatilized and separated from the pyrolysis oil through mutual exchange of heating water and pyrolysis oil.

[0041] In addition, the heating chamber (210) includes a third inlet pipe (214) configured on one side to support the pyrolysis oil so that it can enter the heating space (212), and a third discharge pipe (216) through which the pyrolysis oil is discharged.

[0042] The above third discharge pipe (216) is configured on the other side of the heating chamber (210) so that the pyrolysis oil from which light oil is separated can be provided to the cooler (60).

[0043] In addition, the heating chamber (210) includes a fourth inlet pipe (218) configured on the other side to allow light oil separated from the pyrolysis oil to enter the other side. In this case, the heating chamber (210) is configured so that light oil entering through the fourth inlet pipe (218) can sequentially enter the retention pipe (240) and the filtering unit (250).

[0044] The above heating pipe (220) is configured in the heating space (212) of the heating chamber (210) to heat the pyrolysis oil by promoting the circulation of the heating water provided from the boiler (30).

[0045] In addition, the heating pipe (220) is configured on one side of the heating chamber (210), and a fifth inlet pipe (222) is configured to allow heating water provided from the boiler (30) to enter the heating pipe (220).

[0046] In addition, the heating pipe (220) is configured on the other side of the heating chamber (210), and a fourth discharge pipe (224) is configured to allow the heating water circulated through the heating pipe (220) to re-enter the boiler (30).

[0047] The above stirring unit (230) is configured in the heating space (212) of the heating chamber (210), and supports the pyrolysis oil entering through the third inlet pipe (214) by stirring it to ensure even contact with the heating pipe (220), thereby promoting the volatilization of light oil in the pyrolysis oil.

[0048] For example, the stirring unit (230) includes a motor, a stirring shaft formed at one end of the motor, and stirring blades formed on the stirring shaft, so that the stirring blades rotate according to the rotational force of the motor to stir the pyrolysis oil contained in the heating space (212), thereby ensuring that the pyrolysis oil comes into even contact with the heating pipe (220). Accordingly, by promoting heating and uniform heating of the pyrolysis oil by the heating pipe (220), the amount of light oil volatilization in the pyrolysis oil is expanded, thereby improving the efficiency of obtaining light oil.

[0049] The above-mentioned retention pipe (240) is configured on one side of the above-mentioned heating chamber (210), and receives light oil entering through the fourth entry pipe (218) and supports it to retain it, thereby enabling separation of foreign substances such as condensate contained in the volatile light oil through free fall.

[0050] The above-mentioned retention pipe (240) includes an entry pipe member (242) and a condensation cap (244), as shown in FIG. 5.

[0051] The above-mentioned entry pipe member (242) is configured on the inside of the retention pipe (240), and is configured at a certain height so as to be connected to the fourth entry pipe (218), so that the light oil passing through the fourth entry pipe (218) enters, and the light oil is coagulated during the process of passing through the certain height.

[0052] The above condensation cap (244) is configured at one end, for example, the upper end, of the above inlet pipe member (242), and induces the light oil in a coagulated state to spread over a wide range, thereby inducing the separation of foreign substances such as condensate contained in the light oil through natural drop-off.

[0053] The above filter unit (250) is configured at one end of the retention pipe (240) to filter out foreign substances contained in light oil.

[0054] The above filter unit (250) includes a filter tube (252), a filter net (254), and a fifth discharge tube (256), as shown in FIG. 5.

[0055] The above filter tube (252) is configured on the inside of the filter unit (250) and supports the light oil that has entered the filter unit (250) so that it can enter from the outside to the inside.

[0056] In addition, the filter tube (252) is configured as a perforated plate or mesh net, so that primary filtration is performed during the process of transporting the light oil from the outside to the inside. In this case, the filter tube (252) is formed of a metal material such as stainless steel, so that heat exchange occurs between the metal material and the light oil, thereby inducing the condensation of the light oil, thereby facilitating the removal of foreign substances.

[0057] The above filter net (254) is configured on the inside of the filter tube (252) to perform secondary filtration on the light oil entering the inside of the filter tube (252), thereby obtaining light oil with high purity. In this case, the filter net (254) may be a non-woven fabric. Of course, the present invention is not limited thereto, and the filter net (254) may be a membrane filter or a HEPA filter.

[0058] The above fifth discharge pipe (256) is configured on one side of the filter unit (250) to discharge the filtered light oil that has passed through the filter net (254) to the outside and allow it to enter the condenser (40).

[0059] The above boiler (30) is configured to provide heating water to a preheater (10) and a heater (20).

[0060] The above condenser (40) receives light oil separated from pyrolysis oil through the heater (20) and condenses it to obtain light oil with a low flash point. In addition, the condenser (40) may have a structure identical or similar to that of the preheater (10) described above. In this case, when the condenser (40) adopts a structure identical to that of the preheater (10), cooling water is introduced into the circulation pipe to facilitate the condensation of the light oil.

[0061] In addition, the condenser (40) includes an inlet pipe that receives filtered light oil from the heater (20) and introduces it into the interior, and a discharge pipe that is configured at a position corresponding to the inlet pipe and supports the condensation of the filtered light oil to provide high-purity light oil with a low flash point to the light oil storage unit (50).

[0062] In addition, the condenser (40) includes an inlet pipe for allowing cooling water supplied from a cooling water supply unit (90) to enter, and a discharge pipe configured at a position corresponding to the inlet pipe to support the cooling water so that it circulates inside the condenser (40) to condense the filtered light oil and then re-enters the cooling water supply unit (90).

[0063] The above-mentioned light oil storage unit (50) receives condensed light oil through the condenser (40) and stores it.

[0064] In this case, the hard oil storage unit (50) may be composed of a first storage tank (510) and a second storage tank (520).

[0065] The above first storage tank (510) primarily stores light oil provided through the condenser (40), thereby stabilizing the light oil.

[0066] The second storage tank (520) stores the light oil stabilized through the first storage tank (510) and allows it to be discharged to the outside when necessary. In this case, the second storage tank (520) is configured to have a higher capacity than the first storage tank (510).

[0067] The above cooler (60) receives pyrolysis oil from which light oil has been removed through the heater (20) and cools it. In addition, the cooler (60) may have a structure identical or similar to that of the preheater (10) described above. In this case, when the cooler (60) adopts a structure identical to that of the preheater (10), cooling water is introduced into the circulation pipe to cool the pyrolysis oil.

[0068] In addition, the cooler (60) includes an inlet pipe that receives pyrolysis oil from the heater (20) and introduces it into the interior, and a discharge pipe that is configured at a position corresponding to the inlet pipe and supports the cooled pyrolysis oil so that it can be supplied to the filter (70).

[0069] In addition, the cooler (60) includes an inlet pipe for allowing cooling water supplied from a cooling water supply unit (90) to enter, and a discharge pipe configured at a position corresponding to the inlet pipe to support the cooling water so that it circulates inside the cooler (60) to cool the pyrolysis oil and then re-enters the cooling water supply unit (90).

[0070] The above filter (70) receives the pyrolysis oil cooled by the cooler (60), filters out foreign substances, and obtains pyrolysis oil of high purity. In this case, the above filter (70) is configured in multiples to improve the filtration efficiency of the pyrolysis oil, and the above filter (70) may adopt a reverse filtration system.

[0071] The above pyrolysis oil storage tank (80) receives high-purity pyrolysis oil discharged through the filter (70) and stores it.

[0072] The above cooling water supply unit (90) is configured to provide cooling water to each of the condenser (40) and the cooler (60).

[0073]

[0074] The above description is merely one embodiment of a light oil separation system, and the present invention is not limited to the above-described embodiment. Those skilled in the art will understand that various modifications and implementations are possible without departing from the spirit and scope of the present invention.

Claims

1. A preheater that receives pyrolysis oil from a pyrolysis oil reduction device and preheats it; A heater that heats the pyrolysis oil preheated through the above preheater to induce light oil to be removed through volatilization from the pyrolysis oil; A boiler that supports preheating or heating of the pyrolysis oil by circulating heating water through each of the preheater and heater; A condenser that receives light oil removed from pyrolysis oil through the above heater and condenses it; A light oil storage unit configured to store light oil condensed through the above condenser; A cooler that receives pyrolysis oil from which light oil has been removed from the above heater and supports it to cool it; At least one filter for filtering the pyrolysis oil cooled through the above cooler to obtain high-purity pyrolysis oil; A pyrolysis oil storage tank for storing pyrolysis oil filtered through the above filter; and A cooling water supply unit that circulates cooling water to each of the above condensers and coolers to support cooling of thermal cracking oil or light oil; A light oil separation system characterized by including a .

2. In paragraph 1, the preheater, A chamber having a circulation space formed inside, a first inlet pipe on one side for supporting pyrolysis oil to enter the circulation space, and a first discharge pipe formed at a position corresponding to the first inlet pipe for discharging pyrolysis oil preheated in the circulation space; A circulation pipe configured in the circulation space of the chamber, comprising a second inlet pipe on one side for receiving heated water provided through a boiler, and a second discharge pipe on the other side for supporting the heated water to re-enter the boiler; A plurality of baffles configured in the circulation space of the chamber, configured in close proximity to the first inlet pipe and the first discharge pipe to support the pyrolysis oil so that heat exchange occurs between the first inlet pipe and the first discharge pipe and the circulation pipe; and At least one retention baffle configured between the above-mentioned plurality of baffles to delay the movement of pyrolysis oil from the first inlet pipe to the first outlet pipe, thereby increasing the contact time with the circulation pipe and improving the heat exchange efficiency; A light oil separation system characterized by including a.

3. In paragraph 1, the heater, A heating chamber including a third inlet pipe having a heating space of a certain size formed inside and receiving pyrolysis oil on one side, a third discharge pipe configured to correspond to the third inlet pipe and supporting pyrolysis oil from which light oil has been removed so that it can enter a cooler, and a fourth inlet pipe supporting light oil volatilized by heating of the heating space so that it can enter on the other side; A heating pipe configured with a fifth inlet pipe configured within the heating chamber and supporting the introduction of heating water on one side, and a fourth discharge pipe configured at a position corresponding to the fifth inlet pipe and supporting the introduction of heating water so that the heating water can re-enter the boiler after circulating in the heating space; A stirring unit configured in the heating space of the above heating chamber to increase the contact area of ​​the pyrolysis oil with the heating pipe and induce even heating of the pyrolysis oil, thereby improving the separation efficiency of light oil from the pyrolysis oil; A retention pipe for retaining light oil discharged through the fourth discharge pipe to filter out foreign substances; and A filtering unit configured at one end of the above-mentioned retention pipe to filter light oil and induce discharge of high-purity light oil with a low flash point; A light oil separation system characterized by including a .

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