Pyrolysis furnace for waste plastic oil reduction device

Abstract

The present invention relates to a pyrolysis furnace for a waste plastic oil reduction device. The purpose of the present invention is to provide a pyrolysis furnace for a waste plastic oil reduction device that increases heat transfer by changing the structure of a spiral inner ring formed inside a cylindrical drum, shortens pyrolysis time, and prevents deformation of the drum due to thermal expansion. The pyrolysis furnace for a waste plastic oil reduction device is configured to accommodate waste plastic therein and transfer liquid resin formed by melting the waste plastic by a heating means formed on one side thereof to a transfer means formed on the other side thereof, the pyrolysis furnace for a waste plastic oil reduction device comprising: a drum that has an inlet formed at one end thereof for feeding wire-packed waste plastic and a water collection hole connected to one end of a transfer means at the other end of the drum for draining liquid resin, and rotates slowly in one direction by a driving means; a spiral inner ring that is formed in a spiral shape having a predetermined width along the circumference inside the drum and disassembles and agitates the wire-packed waste plastic; and at least one water collection plate configured at a portion where the water collection hole of the drum is positioned to transfer the liquid resin formed inside the drum to the water collection hole, wherein the spiral inner ring is configured as a pair, through-holes are formed at regular intervals on a body having a certain width, a plurality of inner plates are installed on the body, and the inner plates have a sawtooth shape at the ends thereof.

Description

Pyrolysis furnace for oil reduction of waste plastic

[0001] The present invention relates to a pyrolysis furnace for an oil reduction device for waste plastics, and more particularly, to a pyrolysis furnace for an oil reduction device for waste plastics, which increases heat transfer, shortens pyrolysis time, and prevents deformation of the drum due to thermal expansion by changing the structure of a spiral inner ring formed inside a cylindrical drum.

[0002] In general, plastic is a material that can be formed by heating, pressurizing, or both, or a resin product made using such a material. Typically, plastic refers to a synthetic resin. Although the final product is solid and has a high molecular weight, it possesses fluidity during molding, making it easy to form and produce various shaped products. Furthermore, since plastic is manufactured into a polymer by polymerizing various substances using petroleum as the main raw material, it allows users to polymerize substances with desired properties to produce polymer compounds with various functions and characteristics, which is why its uses and usage are rapidly increasing. Furthermore, since plastic is a type of petroleum compound that uses petroleum as the main raw material and is manufactured into a polymer, it is difficult to decompose, resulting in excellent corrosion resistance and long-term use. It is also easy to form, allowing for the production of various shapes. Furthermore, its light weight allows its diverse applications, from household goods to various industrial products, which is why its 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] Recently, a waste plastic oil reduction device has been developed to increase the resource recycling rate by reducing and recovering the oil contained inside waste plastic.

[0006] However, conventional waste plastic oil reduction devices have a device for crushing collected waste plastic, a device for thermally decomposing waste plastic, and a device for reducing oil from gas generated by thermal decomposition of waste plastic, respectively, and thus, a process for moving the oil is added to each process according to the reduction of the oil, which reduces the process speed, and there is a problem that loss occurs during the movement of the decomposed gas, which reduces the oil reduction efficiency.

[0007] In addition, the conventional waste plastic oil reduction device has the problem that the waste plastic is heated to a high temperature during thermal decomposition inside the decomposition furnace, and when the decomposition furnace is opened, the heat generated by thermal decomposition is released to the outside, which may cause injury to the worker. In addition, in order to supply other waste plastic after thermal decomposition, the decomposition furnace must be cooled before being operated again, which takes a long time due to thermal decomposition.

[0008] In order to solve the above problems, the applicant has registered Korean Patent No. 10-0955297 “Waste Plastic Oil Reduction Device,” Korean Patent No. 10-02437281 “Waste Plastic Coke Treatment Device,” and Korean Patent No. 10-2362800 “Pipe Structure Between Cracker and Transport Means for Waste Plastic Oil Reduction Device.”

[0009] The above-mentioned conventional registered patent has a decomposition furnace installed, and the decomposition furnace has an inlet configured at one end to input waste plastic packed with wire, and a collecting port configured at the other end to be connected to one end of a transport means so that liquid resin can be drained, and includes a drum that rotates in one direction at a low speed by a driving means, a spiral inner ring formed in a spiral shape of a predetermined width along the circumference inside the drum to disintegrate and stir the waste plastic packed with wire, and at least one collecting plate configured at a portion of the drum where the collecting port is located to transport the liquid resin formed inside the drum to the collecting port.

[0010] However, since it is made up of only a spiral inner ring formed inside a conventional cylindrical drum, there are problems in that the amount of heat transfer is small, the thermal decomposition time increases, and the drum is deformed.

[0011] In addition, conventional drums are made of a pinion-gear type, which has the problem of being greatly affected by fluctuations in the rotation axis due to thermal expansion.

[0012] In addition, there is a problem in that the guide bar attached to the outer surface of the conventional drum is positioned in the groove of the roller, which is insufficient to respond to thermal expansion in the pyrolysis furnace.

[0013] In addition, the conventional drum inlet is made of a small square door type, which causes interference between the inlet equipment and the drum door, which increases the inlet time and limits the use of the internal space due to thermal decomposition.

[0014] In addition, the exterior of the conventional decomposition furnace is made of refractory bricks, which has the problem of requiring a long cooling time for the pyrolysis furnace.

[0015] In order to solve the above problems, the purpose of the present invention is to provide a pyrolysis furnace for an oil reduction device of waste plastics, which increases heat transfer, shortens pyrolysis time, and prevents deformation of the drum due to thermal expansion by changing the structure of a spiral inner ring formed inside a cylindrical drum.

[0016] Another object of the present invention is to provide a pyrolysis furnace for oil reduction of waste plastics, which comprises a drive means of a drum of a chain-sprocket type, so that the pyrolysis furnace can operate stably by eliminating vibration and noise that may occur during rotation and by ensuring constant rotation by the tension of the chain regardless of fluctuations in the rotation axis due to thermal expansion of the pyrolysis furnace.

[0017] Another object of the present invention is to provide a thermal decomposition furnace for an oil reduction device for waste plastic, which controls the direction of thermal expansion by installing a square bar around the outer surface of the drum and installing guide rollers on the left and right sides of the square bar, and prevents wear of the drum by indirect contact between the drum and the roller.

[0018] Another object of the present invention is to provide a thermal decomposition furnace for oil reduction of waste plastics, which can shorten the input time and increase the utilization of the internal space of the thermal decomposition furnace by eliminating interference between the input equipment and the drum by configuring the door installed at the input port of the thermal decomposition furnace as a full door type.

[0019] Another object of the present invention is to provide a pyrolysis furnace for oil reduction of waste plastic, in which the outer surface of the pyrolysis furnace is formed of a ceramic board to shorten the cooling time of the pyrolysis furnace after the reaction of the pyrolysis furnace.

[0020] In order to achieve the above object, the present invention provides a pyrolysis furnace for an oil reduction device for waste plastic, which is configured to accommodate waste plastic therein, melt the waste plastic by a heating means configured on one side, and transfer a liquid resin formed by melting the waste plastic to a transfer means configured on the other side, wherein an inlet is configured to inject waste plastic packed with wire at one end, a collecting port is configured at the other end to be connected to one end of the transfer means so that the liquid resin can be drained, and a drum that rotates at a low speed in one direction by a driving means; a spiral inner ring formed in a spiral shape of a predetermined width along the circumference inside the drum and simultaneously stirs and dismantles the waste plastic packed with wire; And at least one collecting plate configured at a portion where the collecting port of the drum is located to transfer the liquid resin formed inside the drum to the collecting port; wherein the spiral inner ring is configured as a pair, and through holes are formed at a certain interval in a body of a certain width, and a plurality of inner plates are installed on the body, and the inner plates are configured to form a sawtooth shape at the end.

[0021] In addition, the above driving means is configured as a chain-sparquet type so that the tension of the chain ensures constant rotation regardless of the change in the rotation axis due to thermal expansion of the pyrolysis furnace, and eliminates vibration and noise that may occur during rotation.

[0022] In addition, a square bar is installed around the outer surface of the drum, and guide rollers are installed on the left and right sides of the square bar.

[0023] In addition, a door is installed at the inlet of the drum, and the door is configured as a full door type to eliminate interference between the inlet equipment and the drum.

[0024] In addition, a fire chamber is formed on the outer surface of the pyrolysis furnace, and the fire chamber is formed by attaching a ceramic board.

[0025]

[0026] According to the present invention, by changing the structure of the spiral inner ring formed inside a cylindrical drum, the heat transfer amount is increased, the thermal decomposition time is shortened, and the drum is prevented from being deformed due to thermal expansion.

[0027] In addition, according to the present invention, the driving means of the drum is configured as a chain-sprocket type, so that the rotation is constant due to the tension of the chain regardless of the change in the rotation axis due to thermal expansion of the pyrolysis furnace, and vibration and noise that may occur during rotation are eliminated, thereby enabling stable operation.

[0028] In addition, according to the present invention, a square bar is installed around the outer surface of the drum, and guide rollers are installed on the left and right sides of the square bar to control the direction of thermal expansion, and there is an effect of preventing wear of the drum by indirect contact between the drum and the roller.

[0029] In addition, according to the present invention, the door installed at the inlet of the decomposition furnace is configured as a full door type, thereby eliminating interference between the inlet equipment and the drum, thereby reducing the inlet time and increasing the utilization of the internal space of the pyrolysis furnace.

[0030] In addition, according to the present invention, the outer surface of the decomposition furnace is formed of a ceramic board, thereby having the effect of shortening the cooling time of the pyrolysis furnace after the reaction in the pyrolysis furnace.

[0031] Figure 1 is a diagram showing the overall configuration of a pyrolysis furnace for oil reduction of waste plastic according to the present invention.

[0032] Figure 2 is a drawing showing in detail the spiral ring portion of a pyrolysis furnace for an oil reduction device for waste plastic according to the present invention.

[0033] Figure 3 is a drawing showing in detail the driving means of a pyrolysis furnace for an oil reduction device for waste plastic according to the present invention.

[0034] Figure 4 is a drawing showing in detail the square bar and guide roller portions of a pyrolysis furnace for oil reduction device of waste plastic according to the present invention.

[0035] Figure 5 is a drawing viewed from A-A of Figure 4.

[0036] Figure 6 is a drawing showing in detail the door portion of a pyrolysis furnace for an oil reduction device for waste plastic according to the present invention.

[0037] Figure 7 is a drawing showing in detail the collecting plate of a pyrolysis furnace for an oil reduction device for waste plastic according to the present invention.

[0038] Figure 8 is a drawing showing in detail the combustion chamber of a pyrolysis furnace for an oil reduction device for waste plastic according to the present invention.

[0039] 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.

[0040] 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.

[0041]

[0042] Hereinafter, the configuration and operation of an embodiment of the present invention will be described with reference to the attached drawings.

[0043] FIG. 1 is a diagram showing the overall configuration of a pyrolysis furnace for an oil reduction device for waste plastics according to the present invention, FIG. 2 is a diagram showing in detail the spiral ring portion of a pyrolysis furnace for an oil reduction device for waste plastics according to the present invention, FIG. 3 is a diagram showing in detail the driving means of a pyrolysis furnace for an oil reduction device for waste plastics according to the present invention, FIG. 4 is a diagram showing in detail the square bar and guide roller portions of a pyrolysis furnace for an oil reduction device for waste plastics according to the present invention, FIG. 5 is a diagram seen from A-A of FIG. 4, FIG. 6 is a diagram showing in detail the door portion of a pyrolysis furnace for an oil reduction device for waste plastics according to the present invention, FIG. 7 is a diagram showing in detail the water collecting plate of a pyrolysis furnace for an oil reduction device for waste plastics according to the present invention, and FIG. 8 is a diagram showing in detail the firebox of a pyrolysis furnace for an oil reduction device for waste plastics according to the present invention.

[0044] Referring to FIGS. 1 to 8, a pyrolysis furnace (100) for an oil reduction device for waste plastic according to the present invention is configured to accommodate waste plastic inside, melt the waste plastic by a heating means (not shown) configured on one side, and transfer the formed liquid resin to a transfer means (200) configured on the other side, and includes a drum (110), a spiral inner ring (120), and a collecting plate (130).

[0045] The drum (110) is configured with an inlet (111) for injecting waste plastic packed with wire at one end, and a collection port (112) connected to one end of a transport means (200) for draining liquid resin at the other end, and is rotated at low speed in one direction by a driving means (113).

[0046] It is preferable that the above driving means (113) be configured as a chain-sparquet type so as to ensure constant rotation by the tension of the chain regardless of fluctuations in the rotation axis due to thermal expansion of the pyrolysis furnace and to eliminate vibration and noise that may occur during rotation.

[0047] In addition, a square bar (114) is installed around the outer surface of the drum (110), and guide rollers (115) are installed on the left and right sides of the square bar (114) to control the direction of thermal expansion, and since there is no contact with the drum (110) due to contact between the guide roller (115) and the square bar (114), wear of the drum (110) can be prevented.

[0048] In addition, a door (116) is installed in the inlet (111) of the drum (110), and the door (116) is configured as a full door type to eliminate interference between the inlet equipment (not shown) and the drum (110).

[0049] The above spiral inner ring (120) is formed in a spiral shape of a certain width along the circumference inside the drum (110) and is used to dismantle and stir waste plastic packed with wire.

[0050] In addition, the spiral inner ring (120) is configured as a pair, and increases the amount of heat transferred to the raw material (waste plastic), thereby shortening the thermal decomposition time and increasing the heat transfer area by 100% compared to the conventional one.

[0051] In addition, the spiral inner ring (120) forms through holes (121) at regular intervals in a body of a certain width, which is to prevent the raw material from being pushed to one side by the inner ring when melted.

[0052] In addition, the spiral inner ring (120) has a plurality of inner plates (122) installed on the body, and the inner plates (122) have a sawtooth shape formed at the end to serve the function of cutting the wire packing the raw material and to facilitate the transport of the raw material.

[0053] The above collecting plate (130) is formed at least once in a portion where the collecting port (112) of the drum (110) is located to transport the liquid resin formed inside the drum (110) to the collecting port (112).

[0054] In addition, the above-mentioned collecting plate (130) is configured at one end of the drum (110), that is, at the part where the collecting port (112) is located, so that when the liquid resin is collected in a water wheel-like manner, the liquid resin flows naturally according to the rotation angle of the drum (110) and is drained into the collecting port (112).

[0055] In addition, as shown in FIG. 6, the collecting plate (130) is configured such that a channel or beam having a cross-section of a 'ㄷ' shape is formed on the bottom surface of the drum (110), and one end thereof has a length that allows it to communicate with the collecting port (112), and the open surface of the 'ㄷ' shape is formed in the rotational direction of the drum (110), so that the liquid resin collected at one end of the drum (110) is scooped up like a water wheel and naturally flows into the collecting port (112) according to the rotational angle.

[0056] In this case, the collecting plates (130) are configured in a radial manner with the collecting port (112) as the center. For example, the collecting plates (130) are four. Of course, it is not limited thereto, and the collecting plate (130) may be configured as one, and the collecting plate (130) may also have a concave shape, and any structure or configuration or shape or shape that can transport the liquid resin collected at one end of the drum (110) to the collecting port (112) located at the center may be adopted.

[0057] Meanwhile, a firebox (300) is formed on the outer surface of the pyrolysis furnace, and the firebox (300) is provided with a ceramic board (310) attached thereto, thereby shortening the cooling time of the pyrolysis furnace compared to conventional refractory brick masonry, and thus the operating efficiency can be increased by reducing the shortening time by about 25%.

[0058]

[0059] The operational state of the pyrolysis furnace of the present invention configured in this manner is as follows.

[0060] In a state where the chamber is composed of a ceramic board (310), a drum (110) is positioned inside the chamber (300), a door (116) formed on one side of the drum (110) is opened, waste plastic packed with a plurality of wires is fed into the inlet (111), and the door (116) is closed and fixed to the inlet (111) so that it is sealed.

[0061] At this time, the door (116) is of a full door type to eliminate interference between the input equipment and the drum (110).

[0062] Next, the drum (110) is rotated in one direction by a driving means (113), and the drum (110) is heated by a heating means configured at the bottom of the drum (110).

[0063] Here, the driving means (113) is of the chain-sparquet type, so that the tension of the chain can be used to ensure constant rotation regardless of the change in the rotation axis due to thermal expansion of the pyrolysis furnace, and vibration and noise that may occur during rotation can be eliminated.

[0064] And, as the drum (110) rotates, the waste plastics packed with wires are mixed up and thrown around in a jumbled manner and are transported in the reverse direction along the spiral inner ring (120). At this time, the wires of the waste plastics packed with wires are cut by the sawtooth shape of the inner plate (122) formed on the spiral inner ring (120), and the compressed waste plastics are dismantled and converted into molten resin by a heating means.

[0065] At this time, the liquid resin can be prevented from being concentrated on one side by the through hole (121) formed in the body of the spiral inner ring (120).

[0066] Additionally, the liquid resin formed by melting waste plastic inside the heated drum (110) is collected by the collecting plate (130) and transferred to the transport means (200) connected to the collecting port (112).

[0067]

[0068] The above description is merely one embodiment of a pyrolysis furnace for oil reduction of waste plastics, 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. In a pyrolysis furnace for oil reduction of waste plastic, which is configured to accommodate waste plastic inside and melt the waste plastic by a heating means configured on one side and transfer the formed liquid resin to a transfer means configured on the other side, A drum comprising: an inlet configured to inject waste plastic packed with wire at one end; a collecting port configured to be connected to one end of a transport means so that liquid resin can be drained at the other end; and a driving means configured to rotate at low speed in one direction; A spiral inner ring formed in a spiral shape of a certain width along the circumference inside the drum, which disintegrates and stirs waste plastic packed with wire; and It comprises at least one collecting plate configured in a portion where the collecting port of the drum is located to transport the liquid resin formed inside the drum to the collecting port; A pyrolysis furnace for an oil reduction device for waste plastic, characterized in that the spiral inner rings are configured as a pair, through holes are formed at regular intervals in a body of a certain width, and a plurality of inner plates are installed on the body, wherein the inner plates are formed with a sawtooth shape at the ends.

2. In paragraph 1, A pyrolysis furnace for oil reduction of waste plastic, characterized in that the above driving means is configured as a chain-sparquet type so as to ensure constant rotation by the tension of the chain regardless of fluctuations in the rotation axis due to thermal expansion of the pyrolysis furnace and to eliminate vibration and noise that may occur during rotation.

3. In paragraph 1, A pyrolysis furnace for oil reduction of waste plastic, characterized in that a square bar is installed around the outer surface of the drum, and guide rollers are installed on the left and right sides of the square bar.

4. In paragraph 1, A pyrolysis furnace for an oil reduction device for waste plastics, characterized in that a door is installed in the inlet of the drum, and the door is configured as a full door type to eliminate interference between the inlet equipment and the drum.

5. In paragraph 1, A pyrolysis furnace for an oil reduction device for waste plastic, characterized in that a combustion chamber is formed on the outer surface of the pyrolysis furnace, and the combustion chamber is configured to have a ceramic board attached thereto.

Images