Waste plastic oil-to-fuel conversion system and waste plastic oil-to-fuel conversion method

Abstract

To provide a waste plastic-to-fuel conversion system having a round horizontal type pyrolysis tank structure capable of efficiently heating by making a structure simple and by heating along a longitudinal whole region of the round horizontal type pyrolysis tank .SOLUTION: A waste plastic-to-fuel conversion system comprises: a pyrolysis cylindrical body composed of a round tube that is horizontally installed thermally and decomposes waste plastic and gasifies it; a waste plastic feeding tube that is composed of a round tube connected to one end of the pyrolysis cylinder and arranged diagonally upward in a direction away from the pyrolysis cylinder, and introduces waste plastic into the pyrolysis cylinder from a diagonal upward direction; and a pyrolysis gas extraction tube composed of a round tube that is connected to the other end of the pyrolysis cylinder and arranged diagonally upward in a direction away from the pyrolysis cylinder, and extracts generated gas from the pyrolysis cylinder in a diagonally upward direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an apparatus and a method for converting waste plastics into oil. [Background technology]

[0002] Waste plastic oil-recycling plants are known as plants that convert waste plastics back into oil and use the resulting oil as boiler fuel. Known types of waste plastic oil-recycling plants include vertical-type plants with a vertically arranged thermal decomposition tank and horizontal-type plants.

[0003] Patent Documents 1 and 2 describe vertical waste plastic oil-recovery apparatuses.

[0004] Patent Document 2 describes a waste plastic oil production system having a horizontal pyrolysis tank in which a residue discharge section is formed at the bottom of the pyrolysis tank and crushed waste plastic is fed from one side of the pyrolysis tank.

[0005] Patent Document 3 describes a round, horizontal pyrolysis tank for recovering oil from waste plastics, which has a long, cylindrical tank body with a main inlet at one end in the longitudinal direction that is opened and closed by a door, and an extraction port at the top for extracting gas from the pyrolysis oil. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-240460 [Patent Document 2] Patent No. 4210222 [Patent Document 3] Japanese Patent Application Laid-Open No. 2010-155944 [Patent Document 4] Patent No. 5558261 Summary of the Invention [Problem to be solved by the invention]

[0007] There is a need for a waste plastic oil production system that can heat effectively over the entire length of a round horizontal pyrolysis tank by arranging a heating means around the tank.

[0008] There is a demand for a round horizontal pyrolysis tank structure that is simple in structure and can heat the entire longitudinal area of ​​the round horizontal pyrolysis tank effectively.

[0009] The waste plastic oil production equipment described in Patent Documents 1 and 2 has a vertical structure, and the waste plastic input section is located in the center of the thermal decomposition tank, so heating is not performed over the entire longitudinal area, and heating is not performed effectively.

[0010] The waste plastic oil production apparatus described in Patent Document 3 has a horizontal structure, but the structure is complex.

[0011] The waste plastic oil production equipment described in Patent Document 4 has a horizontal structure, but the main inlet, which is opened and closed by a door, is formed at one end in the longitudinal direction, and a waste plastic input means must be added when inputting waste plastic.Furthermore, it is not configured to heat the entire longitudinal area, and to heat effectively.

[0012] In view of the above, the present invention aims to provide a waste plastic oil production device having a round horizontal pyrolysis tank structure that has a simple structure, can heat the entire longitudinal length of the round horizontal pyrolysis tank, and can perform heating effectively. [Means for solving the problem]

[0013] The present invention relates to a waste plastic to oil production system including a pyrolysis tank for pyrolyzing and gasifying waste plastics, a gas cooler for cooling the pyrolysis gas produced in the pyrolysis tank to produce oil, and an oil recovery device for recovering the oil produced in the gas cooler. The thermal decomposition tank is configured to include a thermal decomposition cylinder formed of a round cylinder in a horizontal position for thermally decomposing and gasifying waste plastics, a waste plastic input cylinder formed of a round cylinder, connected to one end of the thermal decomposition cylinder, disposed obliquely upward in a direction away from the thermal decomposition cylinder, and for inputting waste plastics into the thermal decomposition cylinder from an obliquely upward and horizontal direction, and a pyrolysis gas extraction cylinder formed of a round cylinder, connected to the other end of the thermal decomposition cylinder, disposed obliquely upward in a direction away from the thermal decomposition cylinder, and for extracting generated gas from the thermal decomposition cylinder from an obliquely upward and horizontal direction, The pyrolysis cylinder is provided with a heating means around the entire periphery, the waste plastic charging cylinder is provided with an opening / closing lid at the charging end, and the pyrolysis gas taking-out cylinder is provided with an opening / closing lid with a pyrolysis gas taking-out port at the taking-out end. The present invention provides a waste plastic oil production device characterized by the above. The present invention also provides a waste plastic to oil production system that includes a pyrolysis tank that thermally decomposes waste plastics to gasify them, a gas cooler that cools the pyrolysis gas produced in the pyrolysis tank to produce oil, and an oil recovery device that recovers the oil produced in the gas cooler. In a waste plastic oil production method using a waste plastic oil production system, the thermal decomposition tank is configured with a pyrolysis cylinder formed of a round cylinder that is installed horizontally and that thermally decomposes and gasifies waste plastics, a waste plastic input cylinder formed of a round cylinder that is connected to one end of the pyrolysis cylinder and disposed obliquely upward in a direction away from the pyrolysis cylinder, and that inputs waste plastics into the pyrolysis cylinder from an obliquely upward and horizontal direction, and a pyrolysis gas extraction cylinder formed of a round cylinder that is connected to the other end of the pyrolysis cylinder and disposed obliquely upward in a direction away from the pyrolysis cylinder, and that extracts generated gas from the pyrolysis cylinder from an obliquely upward and horizontal direction, A produced oil section and a produced gas section are formed in the thermal decomposition tank, and a produced oil section is formed at the bottom and a produced gas section is formed at the top in the thermal decomposition gas extraction cylinder. The present invention provides a method for converting waste plastics into oil using a waste plastics oil conversion device characterized by the above. [Effects of the Invention]

[0014] The present invention is configured to include a pyrolysis cylinder formed of a round cylinder, a waste plastic input cylinder formed of a round cylinder, and a pyrolysis gas extraction cylinder formed of a round cylinder, wherein the waste plastic input cylinder formed of a round cylinder is connected to one end of the pyrolysis cylinder and is arranged diagonally upward in a direction away from the pyrolysis cylinder, so that waste plastic can be input into the pyrolysis cylinder from a diagonally upward, horizontal direction; and the pyrolysis gas extraction cylinder formed of a round cylinder is connected to the other end of the pyrolysis cylinder and is arranged diagonally upward in a direction away from the pyrolysis cylinder, so that the generated gas can be extracted from the pyrolysis cylinder from a diagonally upward, horizontal direction.

[0015] This structure makes it possible to provide a waste plastic oil production device with a round horizontal pyrolysis tank structure that is simple in structure and can heat the entire longitudinal length of the round horizontal pyrolysis tank, thereby enabling effective heating. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a diagram showing the structure of an apparatus for converting waste plastic into oil according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0017] FIG. 1 is a diagram showing the structure of an apparatus for producing oil from waste plastic according to an embodiment of the present invention.

[0018] In Figure 1, waste plastic to oil production system 1, an embodiment of the present invention, is a batch-type waste plastic to oil production system that processes a fixed amount of waste plastic at a time, and is equipped with a thermal decomposition tank 2 that thermally decomposes waste plastic to gasify it, a gas cooler 4 that cools the thermal decomposition gas produced in the thermal decomposition tank 2 to produce oil, and an oil recovery device 6 that recovers the oil produced in the gas cooler. The waste plastic to oil production system of the present invention is not limited to a batch-type waste plastic to oil production system, but can also be a waste plastic to oil production system that performs continuous processing.

[0019] The pyrolysis tank 2 is installed horizontally and is composed of a pyrolysis cylinder 11 formed of a round cylinder that thermally decomposes and gasifies waste plastic, a waste plastic input cylinder 12 formed of a round cylinder that is connected to one end of the pyrolysis cylinder (the right end in the figure) and arranged diagonally upward in a direction away from the pyrolysis cylinder 11 to input waste plastic into the pyrolysis cylinder 11 from diagonally upward and to the side, and a pyrolysis gas extraction cylinder 13 formed of a round cylinder that is connected to the other end of the pyrolysis cylinder and arranged diagonally upward in a direction away from the pyrolysis cylinder 11 to extract the generated gas from the pyrolysis cylinder from diagonally upward and to the side. The pyrolysis cylinder 11 has an inner diameter of, for example, 600φ. The inclination angles of the waste plastic charging cylinder 12 and the pyrolysis gas taking-out cylinder 13 are selected, for example, within the range of 30 to 60 degrees.

[0020] A heater 14 is provided around the entire periphery of the pyrolysis cylinder 11 as a heating means, an open / close lid 15 is provided at the input end of the waste plastic input cylinder 12, and a fixed lid 16 with a pyrolysis gas output port 17 is provided at the output end of the pyrolysis gas output cylinder.

[0021] The opening / closing lid 15 is mounted on the waste plastics charging cylinder 12 by a rotary fixing member 33 so that it can rotate 180 degrees. The opening / closing lid 15 is, for example, a clutch door with a clutch fastening mechanism, and a strong fastening force can be obtained by the clutch fastening engagement. Various types of clutch doors are known.

[0022] In addition, the pyrolysis tank 2 is installed horizontally and is capable of pyrolyzing and gasifying waste plastics as a structure for continuous input. When continuous input of waste plastics is required, the opening and closing lid 15 is equipped with an opening and closing means having a pressure maintaining mechanism, and is configured as a waste plastic input device equipped with a continuous input device.

[0023] The fixed lid 16 is fixed to the pyrolysis gas outlet cylinder 13 in a detachable manner, and has a pyrolysis gas outlet port 17 in the center.

[0024] A power supply unit 21 is provided outside the pyrolysis cylinder 11 and is connected to the heater 14 via a temperature regulator 24. The temperature regulator 24 regulates the temperature of the oil produced in the pyrolysis tank within a predetermined temperature range. Heating by the heater 14 is operated at a maximum temperature of, for example, 500°C. As the heating means, a high frequency generating unit may be provided and a high frequency heating method may be adopted, in which case a coil is wound around the pyrolysis cylinder. The pyrolysis gas produced in the pyrolysis tank 2 is introduced into the gas reforming device 3 via a path 18 connected to a pyrolysis gas outlet 17 .

[0025] A liquid level gauge 20 is installed in the pyrolysis tank, and liquid level information is output to the outside and used to control waste plastic treatment.

[0026] A waste plastic charging device 22 is disposed near the opening / closing lid 15, and the opening / closing lid 15 is opened to charge a certain amount of waste plastic into the waste plastic charging cylinder 12. In this case, the collected waste plastic is solidified and crushed by the waste plastic charging device 22, such as a hopper, and then charged into the waste plastic charging cylinder 12.

[0027] The pyrolysis tank 2 is held inside an outer frame 10, and the outer frame 10 is placed on a load cell 23, which makes it possible to measure the amount of waste plastic input and the amount of oil produced, and is used to control the waste plastic processing.

[0028] As described above, the pyrolysis cylinder 11 according to the embodiment of the present invention is characterized by being composed of a round pyrolysis cylinder 11, a round waste plastic input cylinder 12, and a round pyrolysis gas output cylinder 13. Because the pyrolysis cylinder 11 has these characteristics, there are no obstacles to arranging the heater 14 around the entire periphery of the pyrolysis cylinder, i.e., the entire circumference, and the structure can be simplified and the heating efficiency per periphery area can be improved. According to this embodiment, a produced oil section and a produced gas section are formed in the thermal cracking vessel, and further, a produced oil section is formed at the bottom and a produced gas section is formed at the top in the thermal cracking gas removal cylinder.

[0029] Furthermore, waste plastic is put into the waste plastic input cylinder, and the waste plastic that has been put into the waste plastic input cylinder is then put into the pyrolysis cylinder.

[0030] Furthermore, the product gas generated in the pyrolysis tank is extracted from the product gas section formed in the pyrolysis gas extraction cylinder.

[0031] The waste plastics fed from the waste plastic feeding device 22 slide down the diagonally arranged waste plastic feeding cylinder by its own weight and are introduced into the horizontally arranged waste plastic feeding cylinder 12, eliminating the need for a conveying device for transportation.

[0032] The waste plastic introduced into the pyrolysis cylinder is heated by heaters 14 installed around the entire circumference of the pyrolysis tank, and molten oil is produced. The molten oil forms a produced oil section 31. The liquid level in the produced oil section 31 is measured by a level gauge 20.

[0033] The residue accumulated at the bottom of the thermal decomposition tank 2 is periodically removed by removing the fixed lid 16 and removing it to the outside using a residue removal tool (not shown). It is not necessary to provide a residue removal tool that is fixed to the thermal decomposition tank 2.

[0034] It is not necessary to dispose a rotating shaft with rotor blades inside the pyrolysis tank, but disposing a rotating shaft with rotor blades inside the pyrolysis tank is not excluded.

[0035] The produced oil vaporizes and gasifies as it is heated. A produced gas section 32 is formed above the produced oil section 31. The produced oil section 31 is also formed in the bottom portion of the inclined pyrolysis gas removal cylinder 13, and the produced gas section 32 is also formed in the upper portion of the inclined pyrolysis gas removal cylinder 13.

[0036] The pyrolysis gas outlet 17 is connected to the produced gas section 32 in the pyrolysis gas extraction cylinder, and the gas is led from the produced gas section 32 in the pyrolysis gas extraction cylinder to the path 18 by gas pressure and then led to the gas reforming device 3.

[0037] The gas reforming device 3 removes impurities including water and tar from the gas and returns the tar to the pyrolysis tank 3 .

[0038] The gas from which the impurities have been removed is led to a gas cooler 4. A cooling source 5 is connected to the gas cooler 4 so as to be recyclable, and the cooling medium sent from the cooling source 5 to the gas cooler 4 cools the gas in the gas cooler to produce oil.

[0039] The produced oil is discharged to an oil recovery device 6 and stored there as recovered oil. The stored oil is discharged as appropriate and reused.

[0040] In the above example, the case of thermally decomposing waste plastic has been described, but the present invention also includes cases where the waste plastic contains biomass materials containing moisture, such as palm or jatropha.

[0041] Waste plastics include those that can be turned into polyester and polyvinyl chloride resin materials, for example.

[0042] According to this embodiment, a method for converting waste plastics into oil using a waste plastics oil conversion device is proposed, characterized in that a produced oil section and a produced gas section are formed in a thermal decomposition tank, and further, a produced oil section is formed at the bottom and a produced gas section is formed at the top in a thermal decomposition gas extraction cylinder.

[0043] Furthermore, a method for converting waste plastic into oil using a waste plastic conversion device is proposed, characterized in that waste plastic is introduced into a waste plastic introduction cylinder, and the waste plastic introduced into the waste plastic introduction cylinder is introduced into a thermal decomposition cylinder.

[0044] Furthermore, a method for converting waste plastics into oil using a waste plastics conversion device is proposed, characterized in that the product gas generated in the thermal decomposition tank is extracted from a product gas section formed in the thermal decomposition gas extraction cylinder. [Explanation of symbols]

[0045] 1...waste plastic oil production device, 2...pyrolysis tank, 3...gas reforming device, 4...gas cooler, 6...oil recovery device, 10...outer frame, 11...pyrolysis cylinder, 12...waste plastic input cylinder, 13...pyrolysis gas extraction cylinder, 14...heater, 15...opening / closing lid, 16...fixed lid, 17...pyrolysis gas extraction port, 18...path, 20...level gauge, 21...power source, 22...waste plastic input device, 23...load cell, 24...temperature adjustment device, 25...base, 31...produced oil section, 32...produced gas section.

Claims

1. A waste plastic oil production system including a pyrolysis tank for pyrolyzing and gasifying waste plastic, a gas cooler for cooling the pyrolysis gas produced in the pyrolysis tank to produce oil, and an oil recovery device for recovering the oil produced in the gas cooler, The pyrolysis tank is installed horizontally and is composed of a pyrolysis cylinder formed of a round cylinder for pyrolyzing and gasifying waste plastics, a waste plastic input cylinder formed of a round cylinder, connected to one end of the pyrolysis cylinder, disposed obliquely upward in a direction away from the pyrolysis cylinder, and inputting waste plastics into the pyrolysis cylinder from an obliquely upward and horizontal direction, and a pyrolysis gas extraction cylinder formed of a round cylinder, connected to the other end of the pyrolysis cylinder, disposed obliquely upward in a direction away from the pyrolysis cylinder, and extracting generated gas from the pyrolysis cylinder in an obliquely upward and horizontal direction, A heating means is provided around the entire circumference of the pyrolysis cylinder, an opening / closing lid is provided at the input end of the waste plastic input cylinder, and an opening / closing lid provided with a pyrolysis gas outlet is provided at the output end of the pyrolysis gas output cylinder. This is a waste plastic oil production equipment characterized by the above.

2. The waste plastic oil production system includes a pyrolysis tank for pyrolyzing and gasifying waste plastic, a gas cooler for cooling the pyrolysis gas produced in the pyrolysis tank to produce oil, and an oil recovery device for recovering the oil produced in the gas cooler. A method for converting waste plastics into oil using a waste plastic oil conversion device comprising: a pyrolysis cylinder formed of a round cylinder in which a pyrolysis tank is installed horizontally and which thermally decomposes and gasifies waste plastics; a waste plastic input cylinder formed of a round cylinder, connected to one end of the pyrolysis cylinder, disposed obliquely upward in a direction away from the pyrolysis cylinder, and which inputs waste plastics into the pyrolysis cylinder from an obliquely upward and horizontal direction; and a pyrolysis gas extraction cylinder formed of a round cylinder, connected to the other end of the pyrolysis cylinder, disposed obliquely upward in a direction away from the pyrolysis cylinder, and which extracts generated gas from the pyrolysis cylinder in an obliquely upward and horizontal direction, A produced oil section and a produced gas section are formed in the thermal decomposition tank, and a produced oil section is formed at the bottom and a produced gas section is formed at the top in the thermal decomposition gas extraction cylinder. A method for converting waste plastics into oil using a waste plastics oil conversion device comprising the steps of:

3. In the waste plastic oil production method using the waste plastic oil production apparatus according to claim 2, Waste plastic is put into a waste plastic input cylinder, and the waste plastic put into the waste plastic input cylinder is put into a pyrolysis cylinder. A method for converting waste plastics into oil using a waste plastics oil conversion device comprising the steps of:

4. In the method for producing waste plastic into oil by the waste plastic producing apparatus according to claim 1, The product gas generated in the pyrolysis tank is taken out from a product gas section formed in the pyrolysis gas taking-out cylinder. A method for converting waste plastics into oil using a waste plastics oil conversion device comprising the steps of:

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