JP2004018563A - Apparatus for disposal of waste plastic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for disposal of a waste plastic improving the oil quality of a pyrolysis oil produced by pyrolysis of the waste plastic and carrying out a stable conversion treatment of the waste plastic into the pyrolysis oil. <P>SOLUTION: The apparatus 1 for the disposal of the waste plastic comprises a pyrolyzer 5 and a pyrolysis oil drum 6 connected through a transporting line 52 of the pyrolyzer 5 thereto. A pyrolysis gas ejector 13 for jetting the cooled pyrolysis oil is mounted on the transporting line 52 of the pyrolyzer 5. A separator 7 for sludge in the pyrolysis oil for removing the sludge from the pyrolysis oil is connected to the pyrolysis oil drum 6. A cooling mechanism 10 for cooling the pyrolysis oil in the pyrolysis oil drum 6 is mounted on the pyrolysis oil drum 6. A part of the pyrolysis oil from which the sludge is removed in the separator 7 for the sludge in the pyrolysis oil is fed through a return line to the pyrolysis gas ejector 13 and utilized as the cooled pyrolysis oil. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a waste plastic processing apparatus having a function of thermally decomposing waste plastic to convert the waste plastic into oil, and more particularly to a waste plastic processing apparatus that performs appropriate treatment on pyrolysis oil generated by pyrolyzing waste plastic. It is about.
[0002]
[Prior art]
In recent years, while plastics have been widely used in various fields, the amount of plastics to be discarded has become extremely large. For this reason, there is a shortage of landfill sites for waste plastics, and harmful gases generated during incineration are one of the causes of environmental problems.
[0003]
Therefore, a method of regenerating waste plastic into fuel oil, solid fuel, or the like has been proposed. In particular, a technique for thermally decomposing waste plastics to recycle them as fuel oil has attracted attention because of the high value of fuel oil, which is a recycled product.
[0004]
Such a waste plastic recycling process is generally performed by a waste plastic processing apparatus as follows. That is, the waste plastic is first finely crushed by a crusher or the like, and then is introduced into a thermal decomposition apparatus. Then, the waste plastic put into the pyrolysis device is pyrolyzed into a solid pyrolysis residue and a gaseous pyrolysis oil.
[0005]
The pyrolysis residue is subjected to cooling solidification treatment and the like, and is recycled as a solid fuel. On the other hand, the thermally cracked oil is cooled and stored in a liquid state in the cracked oil drum. At this time, impurities generated during the thermal decomposition of the waste plastic are mixed as sludge into the thermal decomposition in the cracked oil drum. Then, the thermally decomposed oil stored in the decomposed oil drum is sent to a sludge separating device to remove sludge. The pyrolysis oil from which the sludge has been removed and the oil quality has been improved is sent to a refinery and refined into fuel oil.
[0006]
[Problems to be solved by the invention]
The pyrolysis residue and pyrolysis oil generated by pyrolyzing the waste plastic are regenerated into fuel oil, solid fuel, and the like as described above. In this regeneration treatment, it is preferable that impurities are not mixed in the pyrolysis oil in order to obtain a high-quality fuel oil from the pyrolysis oil.
[0007]
However, waste plastics collected as general waste contain various components, and it is difficult to accurately classify such waste plastics for each component. For this reason, during the thermal decomposition treatment of waste plastic, various impurities are generated and mixed into the thermal decomposition oil. For example, a large amount of chlorine component may be generated during the thermal decomposition treatment, and the chlorine component may be mixed into the thermal decomposition oil. Further, solid impurities generated during the thermal decomposition treatment may be mixed into the thermal decomposition oil as sludge.
[0008]
As described above, since various components are mixed in the pyrolysis oil discharged from the pyrolysis apparatus, the oil quality of the pyrolysis oil is not constant, and it is difficult to stably obtain high-quality fuel oil. In addition, impurities sent to the subsequent stage of the pyrolysis apparatus together with the pyrolysis oil may cause various inconveniences, for example, corrosion of waste plastic processing equipment and refinery equipment, blockage of various piping and equipment, The fluidity of the pyrolysis oil may be deteriorated.
[0009]
The present invention has been made in view of such a point, and it is possible to improve the oil quality of pyrolyzed oil generated by the thermal decomposition of waste plastic and to perform a stable waste plasticization process. It is an object to provide a plastic processing apparatus.
[0010]
[Means for Solving the Problems]
The present invention has a heating means, a pyrolysis device that heats waste plastic to be input and pyrolyzes into pyrolysis oil and pyrolysis residue, and is connected to the pyrolysis device and sent from the pyrolysis device. A cracked oil drum that stores the thermally cracked oil, a sludge separation device that is connected to the cracked oil drum, removes sludge from the cracked oil sent from the cracked oil drum, and generates separated oil. Using the separated oil that is provided between the cracker and the cracked oil drum and sent from the sludge separator in oil via the return line, the thermal cracked oil discharged from the cracker is cooled and condensed. A waste plastic processing apparatus comprising: a cracked gas ejector; and a cooling mechanism attached to the cracked oil drum and cooling the thermally cracked oil in the cracked oil drum.
[0011]
According to the present invention, the pyrolysis oil discharged from the pyrolysis device and stored in the decomposed oil drum is cooled to a predetermined temperature by the cooling mechanism and then sent to the in-oil sludge separation device to remove sludge. Thus, by cooling the pyrolysis oil to a predetermined temperature by the cooling mechanism, it is possible to smoothly discharge the pyrolysis oil including the sludge from the cracking oil drum. Thereby, contamination and blockage of various devices by sludge can be effectively prevented, and sludge can be efficiently removed from pyrolysis oil in the in-oil sludge separation device.
[0012]
The present invention has a heating means, a pyrolysis device that heats waste plastic to be input and pyrolyzes into pyrolysis oil and pyrolysis residue, and is connected to the pyrolysis device via a decomposition device transport line, A cracked oil drum that stores the cracked oil sent from the cracking device, and an oil that is connected to the cracked oil drum and removes sludge from the cracked oil sent from the cracked oil drum to produce separated oil Pyrolysis discharged from the pyrolysis unit using the separated oil that is provided between the sludge separation unit and the pyrolysis unit and the cracked oil drum, and is sent from the sludge separation unit in oil via the return line. A cracked gas ejector that cools and condenses oil and is connected to at least one of the cracker transport line, return line, and cracked oil drum, and injects a predetermined amount of additional oil into the cracked oil discharged from the cracker do it And additional oil device for adjusting the components of the cracked oil, a waste plastic processing apparatus characterized by comprising a.
[0013]
According to the present invention, a predetermined amount of additional oil is injected into the pyrolysis oil by the additional oil device, and the components of the pyrolysis oil are adjusted. Therefore, the oil quality of the pyrolysis oil can be adjusted to a certain level by appropriately adjusting the injection amount of the additional oil to the pyrolysis oil. Thereby, it is possible to prevent various kinds of equipment from being contaminated or corroded by the pyrolysis oil having poor oil quality. In addition, it is preferable that components suitable for component adjustment of the pyrolysis oil are appropriately selected and used as components of the additional oil.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
First embodiment
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a view showing a first embodiment of the present invention, and is a system configuration diagram of a waste plastic processing apparatus.
[0016]
As shown in FIG. 1, a waste plastic processing apparatus 1 according to a first embodiment of the present invention includes a waste plastic hopper 2 for finely crushing the input waste plastic, and a waste plastic hopper 2 provided at the bottom of the waste plastic hopper 2. A waste plastic metering device 3 for discharging a predetermined amount of waste plastic in the hopper 2. The waste plastic metering device 3 is provided with a pyrolysis device input device 4 via a storage tube 50 so that the waste plastic is sent from the waste plastic hopper 2 to the pyrolysis device input device 4 via the storage tube 50. Has become. The waste plastic charging valve 20 is attached to the storage pipe 50. By appropriately adjusting the waste plastic charging valve 20, the waste plastic fed to the pyrolyzer input machine 4 via the storage pipe 50 is sent. The amount can be adjusted.
[0017]
The pyrolysis device 5 is connected to the pyrolysis device input device 4, and waste plastic is input to the pyrolysis device 5 from the pyrolysis device input device 4. Note that the pyrolyzer input machine 4 is provided with a pyrolyzer input machine drive motor 4a that drives the pyrolyzer input machine 4.
[0018]
The pyrolysis device 5 has a pyrolysis device drive motor 5a for driving the pyrolysis device 5, and a pyrolysis device combustion burner 21 (heating means). The pyrolysis device combustion burner 21 burns the supplied predetermined fuel to heat the inside of the pyrolysis device 5. For this reason, the waste plastic put into the thermal decomposition device 5 is heated inside the thermal decomposition device 5 and thermally decomposed into a gaseous pyrolysis oil (oil gas) and a pyrolysis residue.
[0019]
Further, the thermal decomposition device 5 has a residue discharge port 22 for discharging a thermal decomposition residue generated inside the device, and a reflux tower 15 for discharging oil gas generated inside the device.
[0020]
A residue cooling conveyor 23 is connected to the residue discharge port 22 via a residue transfer line 51, and the residue transfer line 51 has a residue discharge valve 24 for adjusting a feed amount of waste plastic in the residue transfer line 51. Installed. Further, a residue storage hopper 25 and a residue storage container 26 are sequentially connected to the downstream side of the residue cooling conveyor 23.
[0021]
On the other hand, a cracking oil drum 6 is connected to the reflux tower 15 of the thermal cracking device 5 via a cracking device transport line 52, and the oil gas sent from the thermal cracking device 5 is supplied to the cracking oil drum 6. Liquefied pyrolysis oil is stored. Further, a decomposition gas ejector 13 is attached to a decomposition device transport line 52 provided between the thermal decomposition device 5 and the decomposition oil drum 6. The cracked gas ejector 13 blows cooling oil onto the oil gas (pyrolyzed oil) discharged from the pyrolyzer 5 to the cracker transport line 52. The cooling oil ejected from the decomposition gas ejector 13 in this manner cools and condenses the oil gas. The cooling oil used in the cracked gas ejector 13 is a separated oil obtained by removing sludge from thermally decomposed oil in an oil-in-sludge separation device 7 described later.
[0022]
A drum gas transfer line 53 extending to the refinery equipment is attached to the ceiling of the cracked oil drum 6, while a drum cracked oil transfer line extending to the in-oil sludge separation device 7 is provided at the bottom 6 a of the cracked oil drum 6. 54 are attached. A drum vacuum pump 27 is attached to the drum gas transfer line 53, and the gas in the cracked oil drum 6 is sent to the refinery equipment via the drum gas transfer line 53 by the drum vacuum pump 27. . The cracked oil pump 28 is attached to the drum cracked oil transport line 54, and the cracked oil pump 28 allows the thermally cracked oil in the cracked oil drum 6 to be transferred through the drum cracked oil transport line 54 to the sludge separating device 7 in oil. To be sent to
[0023]
Further, the cracked oil drum 6 is provided with a cracked oil drum internal thermometer 29 (pyrolyzed oil temperature measuring device), a cracked oil drum internal level meter 30 (pyrolyzed oil level measuring device), and a cooling mechanism 10, respectively. Has been. The cracked oil drum internal thermometer 29 measures the temperature of the thermally cracked oil in the cracked oil drum 6 and sends the measured value to the cooling mechanism 10 and a return line adjusting device 32 to be described later. The cracked oil drum internal level meter 30 measures the liquid level of the thermally cracked oil in the cracked oil drum 6 and sends the measured value to the return line adjusting device 32.
[0024]
The cooling mechanism 10 has a tubular structure, and hot water of a predetermined temperature is caused to flow through the annular structure. Therefore, this warm water is used as a cooling source for cooling the thermally decomposed oil in the decomposed oil drum 6. Further, the cooling mechanism 10 adjusts the temperature of the hot water based on the measurement value sent from the cracked oil drum internal thermometer 29 to cool the thermally cracked oil in the cracked oil drum 6. At this time, the cooling mechanism 10 adjusts the temperature of the hot water so that the thermally decomposed oil in the decomposed oil drum 6 has a temperature equal to or higher than the pour point.
[0025]
The sludge-in-oil separation device 7 removes sludge from the thermally decomposed oil sent through the drum decomposed oil transport line 54 to purify the separated oil.
[0026]
The cracked gas ejector 13 is connected to the sludge in oil separating device 7 via a return line 55, and a part of the separated oil discharged from the sludge in oil separating device 7 is decomposed into the cracked gas through the return line 55. It is sent to the ejector 13 and used as cooling oil. The return line 55 is provided with a return line adjusting device 32 having a return valve 31 and a return line flow meter 33. The return line adjusting device 32 adjusts the return valve 31 based on each measurement value sent from the cracked oil drum internal thermometer 29 and the cracked oil drum internal level meter 30, and sends the cracked gas ejector from the in-oil sludge separation device 7. The feed amount of the separated oil sent to 13 is adjusted. The return line flow meter 33 measures the flow rate of the separated oil flowing through the return line 55, and the measured value is sent from the return line flow meter 33 to the return line adjustment device 32.
[0027]
The separated oil tank 8 is connected to the oil-in-oil sludge separation device 7 via a tank transfer line 56, and the separated oil discharged from the oil-in-oil sludge separation device 7 is separated into the separated oil tank 8 to be stored. A tank supply valve 34 is attached to the tank transfer line 56, and the supply amount of the separated oil to the separated oil tank 8 is adjusted by adjusting the tank supply valve 34.
[0028]
Refinery equipment is connected to the separated oil tank 8 via a shipping line 57, and the separated oil stored in the separated oil tank 8 is sent to the refinery equipment. A separated oil shipping pump 19 is attached to the shipping line 57, and a predetermined amount of separated oil is smoothly sent from the separated oil tank 8 to the refinery equipment by the separated oil shipping pump 19.
[0029]
Next, the operation of the present embodiment having such a configuration will be described.
[0030]
In the waste plastic processing apparatus 1, the waste plastic is liquefied as follows.
[0031]
That is, the waste plastic is put into the waste plastic hopper 2 and finely crushed, and then sent to the pyrolysis device input machine 4 via the storage pipe 50. At this time, the amount of waste plastic discharged from the waste plastic hopper 2 is adjusted by the waste plastic metering device 3, and the amount of waste plastic fed into the storage tube 50 is adjusted by the waste plastic input valve 20.
[0032]
The waste plastic sent to the pyrolyzer input machine 4 is injected into the pyrolyzer 5 and heated. Thereby, the waste plastic is thermally decomposed into gaseous pyrolysis oil (oil gas) and solid pyrolysis residue. At this time, the heating amount of the waste plastic in the pyrolysis device 5 is adjusted by the pyrolysis device combustion burner 21, and the waste plastic can be appropriately pyrolyzed.
[0033]
The pyrolysis residue generated in the pyrolysis device 5 is discharged from the residue discharge port 22 and sent to the residue cooling conveyor 23 via the residue transport line 51. Then, the pyrolysis residue is cooled until it is carried to the residue storage hopper 25 by the residue cooling conveyor 23. The pyrolysis residue cooled in the residue cooling conveyor 23 is put into a residue storage hopper 25, and then a predetermined amount of the pyrolysis residue is loaded from the residue storage hopper 25 into a residue storage container 26. Then, the pyrolysis residue loaded in the residue storage container 26 is sent to a reprocessing facility or the like (not shown), where the solid fuel is regenerated.
[0034]
On the other hand, the oil gas generated in the thermal cracker 5 is discharged from the reflux tower 15 to the cracker transport line 52 and sent to the cracked oil drum 6.
[0035]
At this time, cooling oil is blown from the decomposition gas ejector 13 to the oil gas flowing in the decomposition device transport line 52. Thus, the oil gas is cooled by the cooling oil and condensed while being sent to the cracked oil drum 6 via the cracker transport line 52. For this reason, in the decomposed oil drum 6, liquid pyrolysis oil obtained by cooling and condensing oil gas is stored.
[0036]
Thereby, the non-condensable cracked oil drum gas is separated in the cracked oil drum 6, and the separated gas in the cracked oil drum 6 is sent to the refinery equipment via the drum gas transfer line 53 by the drum vacuum pump 27. It is supposed to be. Cracked oil drum gas, which is a combustible gas, is used as fuel or the like in refinery facilities.
[0037]
On the other hand, the temperature of the thermally decomposed oil stored in the decomposed oil drum 6 is measured by the decomposed oil drum internal thermometer 29 and the liquid level is measured by the decomposed oil drum internal level meter 30. Then, the cracked oil drum internal thermometer 29 sends the measured value to the cooling mechanism 10 and also sends it to the return line adjusting device 32. The cracked oil drum internal level meter 30 sends the measured value to the return line adjusting device 32.
[0038]
Further, the thermally decomposed oil stored in the decomposed oil drum 6 is cooled by the cooling mechanism 10. At this time, the cooling mechanism 10 removes the thermally decomposed oil in the decomposed oil drum 6 sent from the decomposed oil drum thermometer 29 so that the thermally decomposed oil in the decomposed oil drum 6 has a temperature higher than the pour point. The temperature of the hot water is adjusted in a feedback manner based on the temperature. Then, by flowing hot water whose temperature has been adjusted into the tubular structure of the cooling mechanism 10, the thermally decomposed oil in the decomposed oil drum 6 is cooled while a temperature equal to or higher than the pour point is secured. Therefore, the thermally decomposed oil in the decomposed oil drum 6 can flow and is smoothly discharged from the decomposed oil drum 6. Note that the thermally decomposed oil in the decomposed oil drum 6 contains sludge generated during the thermal decomposition of the waste plastic. Therefore, as the thermally decomposed oil is discharged from the decomposed oil drum 6, sludge is also discharged from the decomposed oil drum 6.
[0039]
Then, the thermally decomposed oil in the decomposed oil drum 6 is sent to the in-oil sludge separation device 7 through the drum decomposed oil transport line 54 together with the sludge. In the in-oil sludge separation device 7, sludge is removed from the pyrolysis oil, and the separated oil having improved oil quality is refined. The cracked oil pump 28 regulates the amount of the thermally cracked oil sent from the cracked oil drum 6 to the sludge separating device 7 in oil, and the sludge separating device 7 removes sludge from an appropriate amount of the cracked oil. ing.
[0040]
Part of the separated oil refined by the oil-in-oil sludge separation device 7 is sent to the cracked gas ejector 13 via the return line 55, and cools and condenses the oil gas in the cracker transport line 52 discharged from the thermal cracker 5. It is used as cooling oil. The separated oil returned to the cracked gas ejector 13 in this way is purified from the thermally cracked oil cooled to a predetermined temperature in the cracked oil drum 6, and thus is preferably used as a cooling oil for cooling and condensing the oil gas. be able to. Further, by using the separated oil from which sludge is removed and which has good oil quality as the cooling oil, it is possible to effectively prevent contamination of the pyrolysis oil to which the cooling oil is sprayed. Accordingly, it is possible to prevent contamination and blockage of devices in the waste plastic processing apparatus 1 such as the cracked gas ejector 13, the cracking device transport line 52, the cracked oil drum 6, the drum cracked oil transport line 54, and the like.
[0041]
At this time, the return amount of the separated oil returned from the in-oil sludge separation device 7 to the cracked gas ejector 13 is adjusted by the return line adjustment device 32. That is, the return line adjusting device 32 adjusts the return valve 31 based on the measurement values sent from each of the cracked oil drum internal thermometer 29 and the cracked oil drum internal level meter 30 to flow through the return line 55. The flow rate of separation oil is adjusted. Thus, by adjusting the flow rate of the separated oil in the return line 55, the amount of the separated oil returned from the sludge-in-oil separation device 7 to the cracked gas ejector 13 is adjusted. Accordingly, the return amount of the separated oil returned from the in-oil sludge separation device 7 to the cracked gas ejector 13 is adjusted according to the temperature and the liquid level of the thermally cracked oil inside the cracked oil drum 6.
[0042]
Further, the return line adjustment device 32 adjusts the return valve 31 in a feedback manner based on the measurement value of the return line flow meter 33 indicating the flow rate of the separated oil flowing through the return line. Therefore, a predetermined amount of separated oil is accurately and reliably returned from the oil-in-sludge separation device 7 to the cracked gas ejector 13.
[0043]
On the other hand, other separated oil refined by the oil-in-oil sludge separation device 7 is sent to the separated oil tank 8 via the tank transfer line 56 and stored therein. At this time, the feed amount from the in-oil sludge separating device 7 to the separated oil tank 8 is adjusted by the tank supply valve 34. Then, the separated oil stored in the separated oil tank 8 is sent by the separated oil shipping pump 19 to the refinery equipment installed at the subsequent stage via the shipping line 57 and refined into fuel oil at the refinery equipment. Is done.
[0044]
As described above, according to the present embodiment, the separated oil from which the sludge has been removed from the thermally decomposed oil in the oil-in-sludge separation device 7 is used as the cooling oil ejected from the decomposed gas ejector 13. Therefore, the gaseous pyrolysis oil (oil gas) discharged from the pyrolysis device 5 can be cooled and condensed without supplying new oil as cooling oil from the outside. Since there is no need to supply new oil from the outside in this way, the waste plastic processing apparatus 1 can be operated efficiently, and the progress of environmental pollution can be effectively prevented.
[0045]
In particular, the separated oil supplied as the cooling oil to the cracked gas ejector 13 is purified from the thermally cracked oil cooled by the cooling mechanism 10 in the cracked oil drum 6. Therefore, by using the separated oil as the cooling oil, it is possible to sufficiently cool and condense the pyrolysis oil discharged from the pyrolysis device 5. Further, since the sludge is removed by the in-oil sludge separating device 7 and the separated oil having improved oil quality is used as the cooling oil, it is possible to effectively prevent contamination and blockage of each device and pipes, and the waste plastic processing device 1 Can be driven stably and safely.
[0046]
The cooling mechanism 10 provides feedback based on the temperature of the thermally decomposed oil in the decomposed oil drum 6 measured by the decomposed oil drum thermometer 29 so that the thermally decomposed oil in the decomposed oil drum 6 has a temperature equal to or higher than the pour point. The pyrolysis oil is cooled. As described above, by adjusting the temperature of the thermally decomposed oil in the decomposed oil drum 6 in a feedback manner, the temperature of the thermally decomposed oil in the decomposed oil drum 6 is reliably maintained at a temperature equal to or higher than the pour point. Then, the thermally decomposed oil in the decomposed oil drum 6 having a temperature equal to or higher than the pour point flows smoothly to the drum decomposed oil transport line 54. As a result, sludge mixed in the pyrolysis oil is also sent from the cracking oil drum 6 to the in-oil sludge separation device 7 via the drum cracking oil transport line 54 together with the pyrolysis oil. As described above, by appropriately cooling the thermally decomposed oil in the decomposed oil drum 6 by the cooling mechanism 10, sludge accumulation in the decomposed oil drum 6 is prevented, and the sludge discharge performance of the decomposed oil drum 6 is improved. And the efficiency of sludge collection in the oil-in-sludge separation device 7 can be improved.
[0047]
Also, by using hot water (water) as the cooling source of the cooling mechanism 10, the pyrolysis oil can be cooled relatively easily and quickly, which is very convenient.
[0048]
Further, by adjusting the flow rate of the separated oil in the return line 55 by the return line adjusting device 32, the feed amount of the separated oil returned from the in-oil sludge separating device 7 to the cracked gas ejector 13 is adjusted. The return line adjusting device 32 controls the return line based on the temperature and the liquid level of the thermally cracked oil in the cracked oil drum 6 sent from each of the cracked oil drum internal thermometer 29 and the cracked oil drum internal level meter 30. The flow rate of the separated oil in 55 is adjusted. For this reason, the separated oil is supplied from the in-oil sludge separation device 7 to the cracked gas ejector 13 in a state where the temperature and the liquid level of the thermally cracked oil in the cracked oil drum 6 are appropriately adjusted, and the waste plastic processing device No. 1 stable operation is achieved. Further, the return line adjusting device 32 adjusts the return valve 31 in a feedback manner based on the flow rate of the separated oil in the return line 55 sent from the return line flow meter 33. Therefore, the feed amount of the separated oil returned from the sludge separating device 7 to the cracked gas ejector 13 can be adjusted accurately and reliably.
[0049]
In addition, from the viewpoint of supplying an appropriate amount of separated oil to the cracked gas ejector 13, the return line adjusting device 32 controls the return line based on the measured values of both the cracked oil drum internal thermometer 29 and the cracked oil drum internal level meter 30. It is preferable to adjust the flow rate of the separated oil within 55. However, it is also possible for the return line adjusting device 32 to adjust the flow rate of the separated oil in the return line 55 based on only one of the cracked oil drum internal thermometer 29 and the cracked oil drum internal level meter 30. In addition, the temperature or the liquid level of the thermally decomposed oil in the decomposed oil drum 6 can be appropriately adjusted.
[0050]
As described above, in the waste plastic processing apparatus 1 of the present embodiment, it is possible to prevent various devices and pipes from being contaminated or blocked by a simple structure, and to realize stable operation of the waste plastic processing apparatus 1. It is.
[0051]
Second embodiment
FIG. 2 is a view showing a second embodiment of the present invention, and is a system configuration diagram of a waste plastic processing apparatus.
[0052]
In the second embodiment shown in FIG. 2, the bottom 6a of the cracked oil drum 6 has a predetermined inclination. The inclination of the bottom 6a is inclined toward the position where the drum disassembly oil transfer line 54 is attached. For this reason, the sludge settled on the bottom 6a of the cracked oil drum 6 flows together with the thermally cracked oil toward the position where the drum cracked oil transfer line 54 is attached by the action of gravity.
[0053]
Further, a sludge cleaning injection nozzle 11 is attached to the cracked oil drum 6. The sludge separating device 7 in oil and the injection nozzle 11 for sludge washing are connected by a washing oil line 58, and a part of the separated oil discharged from the sludge separating device 7 in oil passes through the washing oil line 58. And sent to the sludge washing injection nozzle 11. The sludge cleaning injection nozzle 11 jets the separated oil sent from the in-oil sludge separating device 7 into the decomposed oil drum 6 to wash out the sludge in the decomposed oil drum 6. The sludge cleaning injection nozzle 11 is capable of ejecting the separated oil to any part of the cracked oil drum 6.
[0054]
Other configurations are substantially the same as those of the first embodiment shown in FIG.
[0055]
In FIG. 2, the same parts as those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.
[0056]
The gaseous pyrolysis oil (oil gas) generated by pyrolyzing the waste plastic in the pyrolysis device 5 is sent from the reflux tower 15 of the pyrolysis device 5 to the decomposition oil drum 6 via the decomposition device transport line 52. Is stored in the decomposed oil drum 6.
[0057]
The pyrolysis oil stored in the cracked oil drum 6 contains sludge generated during the pyrolysis of waste plastic, and this sludge is directed toward the bottom 6a of the cracked oil drum 6 under the influence of gravity. Settles.
[0058]
At this time, since the bottom 6a of the cracked oil drum 6 having a predetermined inclination is inclined toward the position where the drum cracked oil transport line 54 is attached, the sludge settled on the bottom 6a is inclined to the bottom 6a. Flows along. Therefore, the pyrolysis oil and the sludge near the bottom 6a flow along the slope of the bottom 6a and flow into the drum decomposition oil transport line 54.
[0059]
The thermally decomposed oil including the sludge flowing into the drum decomposed oil transport line 54 is sent to the in-oil sludge separation device 7, where the sludge is removed and purified into separated oil.
[0060]
A part of the separated oil refined by the oil-in-oil sludge separation device 7 is returned to the cracked gas ejector 13 via the return line 55, and is used as cooling oil. Another part of the separated oil purified by the in-oil sludge separation device 7 is sent to the sludge washing injection nozzle 11 through the washing oil line 58. The other separated oil purified by the in-oil sludge separation device 7 is sent to the separated oil tank 8 via the tank transfer line 56.
[0061]
The sludge cleaning injection nozzle 11 jets the separated oil sent from the oil-in-oil sludge separation device 7 into the decomposed oil drum 6 to wash out the sludge in the decomposed oil drum 6. At this time, the sludge cleaning injection nozzle 11 jets the separated oil to a desired location in the cracked oil drum 6 to effectively wash the sludge in the cracked oil drum 6. The separated oil jetted into the cracked oil drum 6 is sent to the sludge separating device 7 in oil via the drum cracked oil transport line 54 together with the cracked oil sent from the cracking device 5.
[0062]
As described above, according to the present embodiment, the sludge settled on the bottom 6a of the cracked oil drum 6 flows along the inclination of the bottom 6a by the action of gravity, and is transferred from the cracked oil drum 6 to the drum cracked oil transport line. It is smoothly discharged to 54. As described above, by providing the bottom 6a of the cracked oil drum 6 with a predetermined inclination, the accumulation of sludge in the cracked oil drum 6 is effectively prevented, and the sludge discharge performance of the cracked oil drum 6 is improved. In addition, the sludge collection efficiency in the oil-in-sludge separation apparatus 7 can be improved.
[0063]
Further, the sludge in the cracked oil drum 6 is washed away by the separated oil jetted from the sludge washing injection nozzle 11. This prevents sludge from sticking and accumulating in the decomposed oil drum 6 and effectively prevents contamination and blockage of the decomposed oil drum 6 by sludge. In particular, the separated oil spouted from the sludge washing injection nozzle 11 has a good oil quality from which sludge has been removed by the in-oil sludge separation device 7, so that the sludge contaminates and blocks the cracked oil drum 6 and the like. Can be more effectively prevented. Since the sludge contained in the cracked oil in the cracked oil drum 6 is particularly likely to adhere to the bottom 6a of the cracked oil drum 6, the sludge is separated from the sludge washing injection nozzle 11 toward the bottom 6a of the cracked oil drum 6. Preferably, the oil is spouted.
[0064]
Third embodiment
FIG. 3 is a view showing a third embodiment of the present invention, and is a system configuration diagram of a waste plastic processing apparatus.
[0065]
In the third embodiment shown in FIG. 3, the additional oil device 12 is connected to the cracked oil drum 6 via an additional oil line 59. The additional oil device 12 is configured to inject a predetermined amount of additional oil into the thermally decomposed oil in the decomposed oil drum 6 and adjust the components of the thermally decomposed oil.
[0066]
Further, the additional oil device 12 is connected to the cracked oil drum internal thermometer 29, and the measured value of the cracked oil drum internal thermometer 29 is sent from the cracked oil drum internal thermometer 29 to the additional oil device 12. I have.
[0067]
The mixed oil pH analyzer 38 is attached to the drum cracked oil transfer line 54 via a mixed oil analysis port 60. The mixed oil pH analyzer 38 measures the pH of the thermally cracked oil flowing through the drum cracked oil transport line 54, and sends the measured value to the additional oil device 12.
[0068]
An additional oil supply flow meter 36, an additional oil supply amount adjustment valve 37, and an additional oil injection nozzle 40 are sequentially attached to the additional oil line 59. The additional oil supply flow meter 36 measures the flow rate of the additional oil in the additional oil line 59, and sends the measured value to the additional oil device 12. The additional oil supply amount adjustment valve 37 is controlled by the additional oil device 12 so that the flow rate of the additional oil in the additional oil line 59 can be adjusted.
[0069]
The additional oil device 12 determines the injection amount of the additional oil based on the measurement value sent from the cracked oil drum internal thermometer 29 and the measurement value sent from the mixed oil pH analyzer 38. ing. Then, based on the determined additional oil injection amount, the additional oil device 12 controls the additional oil supply amount adjustment valve 37 in consideration of the measurement value sent from the additional oil supply flow meter 36, and Additional oil is injected into the pyrolysis oil inside.
[0070]
Other configurations are substantially the same as those of the first embodiment shown in FIG.
[0071]
In FIG. 3, the same portions as those of the first embodiment shown in FIG.
[0072]
The gaseous pyrolysis oil (oil gas) generated by pyrolyzing the waste plastic in the pyrolysis device 5 is sent from the reflux tower 15 of the pyrolysis device 5 to the decomposition oil drum 6 via the decomposition device transport line 52. Is stored in the decomposed oil drum 6.
[0073]
The temperature of the thermally cracked oil stored in the cracked oil drum 6 is measured by a cracked oil drum internal thermometer 29, and the measured value is sent from the cracked oil drum internal thermometer 29 to the additional oil device 12.
[0074]
Then, the thermally cracked oil is sent from the cracked oil drum 6 to the in-oil sludge separation device 7 via the drum cracked oil transport line 54. At this time, a part of the thermally cracked oil flowing through the drum cracked oil transport line 54 flows into the mixed oil analysis port 60, and the pH of the thermally cracked oil at the mixed oil analysis port 60 is measured by the mixed oil pH analyzer 38. Then, the measured pH value is sent from the mixed oil pH analyzer 38 to the additional oil device 12.
[0075]
Thereafter, the pyrolysis oil is sludge removed in the oil-in-sludge separation device 7 to be refined into separated oil. A part of the separated oil discharged from the oil-in-oil sludge separation device 7 is sent to the cracked gas ejector 13 via the return line 55, and the other separated oil is sent to the refinery equipment via the separated oil tank 8. .
[0076]
Incidentally, the additional oil device 12 is configured to add additional oil to the cracked oil drum 6 based on the measurement value sent from the cracked oil drum internal thermometer 29 and the measurement value sent from the mixed oil pH analyzer 38. Determine the injection volume. That is, based on the temperature of the thermally decomposed oil in the decomposed oil drum 6 and the pH of the thermally decomposed oil discharged from the decomposed oil drum 6, the additional oil device 12 determines whether the thermally decomposed oil in the decomposed oil drum 6 is appropriate. The amount of additional oil to be injected is determined so as to obtain oil quality. Specifically, for example, when the measurement value sent from the cracked oil drum internal thermometer 29 is higher than a predetermined level temperature, the injection amount of the additional oil increases, and when the measurement value is lower than the predetermined level temperature, The amount of additional oil injected is reduced. When the measured value sent from the mixed oil pH analyzer 38 is higher than a predetermined level pH, the injection amount of the additional oil is reduced, and when the measured value is lower than the predetermined level pH, the additional oil is injected. The amount increases.
[0077]
Then, the additional oil device 12 adjusts the additional oil supply amount adjustment valve 37 based on the determined additional oil injection amount, and supplies the thermally decomposed oil in the decomposed oil drum 6 from the additional oil injection nozzle 40 through the additional oil line 59. Fill with additional oil.
[0078]
At this time, the flow rate of the additional oil flowing through the additional oil line 59 is measured by the additional oil supply flow meter 36, and the measured value is sent to the additional oil device 12. Then, the additional oil device 12 adjusts the additional oil supply amount adjustment valve 37 based on the measurement value sent from the additional oil supply flow meter 36, and feeds back the injection amount of the additional oil to be injected into the cracked oil drum 6 in a feedback manner. I am adjusting. As described above, the injection amount of the additional oil is adjusted in a feedback manner, so that the additional oil of the injection amount determined by the additional oil device 12 is accurately and reliably injected into the thermally cracked oil in the cracked oil drum 6. Is possible.
[0079]
As described above, according to the present embodiment, the additional oil device 12 injects a predetermined amount of the additional oil into the thermally decomposed oil in the decomposed oil drum 6 to adjust the components of the thermally decomposed oil. The oil is adjusted to a certain level of oil quality. Therefore, for example, even when the pyrolysis oil discharged from the pyrolysis device 5 contains a very large amount of chlorine component, the additional oil device 12 allows a predetermined amount of additional oil to be stored in the pyrolysis oil drum 6. And the components of the pyrolysis oil are adjusted to ensure a certain level of oil quality. As described above, by adding the additional oil and adjusting the oil quality of the pyrolysis oil to a certain level, various devices of the waste plastic processing apparatus 1 and the refinery equipment are contaminated by the pyrolysis oil and the separated oil. And corrosion can be effectively prevented. Further, when feedstock recycling is performed using pyrolysis oil or separated oil discharged from the waste plastic processing device 1, the pyrolysis oil or separated oil adjusted to a certain level of oil quality as described above is used. By doing so, it is possible to carry out high-quality and stable feedstock recycling.
[0080]
In particular, since the injection amount of the additional oil is determined based on the temperature of the thermally decomposed oil in the decomposed oil drum 6 and the pH of the thermally decomposed oil discharged from the decomposed oil drum 6, The temperature of the pyrolyzed oil can be appropriately adjusted, and the pH of the pyrolyzed oil discharged from the cracked oil drum 6 can be appropriately adjusted.
[0081]
The injection amount of the additional oil is adjusted in a feedback manner based on the flow rate of the additional oil in the additional oil line 59 sent from the additional oil supply flow meter 36 to the additional oil device 12. Thereby, a predetermined amount of additional oil can be accurately and reliably injected into the thermally decomposed oil in the decomposed oil drum 6, and the waste plastic processing apparatus 1 can be stably operated.
[0082]
The mixed oil pH analyzer 38 measures the pH of the thermally decomposed oil discharged from the decomposed oil drum 6. Therefore, the mixed oil pH analyzer 38 measures the pH of the mixed oil of the pyrolyzed oil and the additional oil sent from the pyrolyzer 5.
[0083]
Further, the mixed oil pH analyzer 38 may be attached to the cracked oil drum 6 instead of the drum cracked oil transport line 54. In this case, the pH of the thermally decomposed oil in the decomposed oil drum 6 is measured by the mixed oil pH analyzer 38, and the measured value is sent from the mixed oil pH analyzer 38 to the additional oil device 12. Then, the additional oil device 12 determines the injection amount of the additional oil based on the pH of the thermally decomposed oil in the decomposed oil drum 6 and injects the additional oil into the thermally decomposed oil in the decomposed oil drum 6. Also in this case, the above-described operation and effect of the present embodiment can be obtained, and the components of the thermally decomposed oil in the decomposed oil drum 6 are adjusted by the additional oil, and the thermally decomposed oil is adjusted to a certain level of oil quality. .
[0084]
Fourth embodiment
FIG. 4 is a view showing a fourth embodiment of the present invention, and is a system configuration diagram of a waste plastic processing apparatus.
[0085]
In the fourth embodiment shown in FIG. 4, the additional oil device 12 is connected to the return line 55 instead of being connected to the cracked oil drum 6. That is, the additional oil device 12 is connected to the return line 55 via the additional oil line 59, and the additional oil is injected into the return line 55.
[0086]
Further, instead of the mixed oil pH analyzer 38, a mixed oil organic acid amount analyzer 39 is attached to the drum cracked oil transfer line 54 via a mixed oil analysis port 60. The mixed oil organic acid analyzer 39 measures the amount of organic acid in the thermally cracked oil flowing through the drum cracked oil transport line 54, and sends the measured value to the additional oil device 12.
[0087]
The additional oil device 12 determines the injection amount of the additional oil based on the measurement value sent from the cracked oil drum internal thermometer 29 and the measurement value sent from the mixed oil organic acid amount analyzer 39. It has become. Then, based on the determined additional oil injection amount, the additional oil device 12 controls the additional oil supply amount adjustment valve 37 in consideration of the measurement value sent from the additional oil supply flow meter 36, and Additional oil is to be injected.
[0088]
Other configurations are substantially the same as those of the third embodiment shown in FIG.
[0089]
In FIG. 4, the same portions as those of the third embodiment shown in FIG. 3 are denoted by the same reference numerals, and detailed description is omitted.
[0090]
The gaseous pyrolysis oil (oil gas) generated by pyrolyzing the waste plastic in the pyrolysis device 5 is sent from the reflux tower 15 of the pyrolysis device 5 to the decomposition oil drum 6 via the decomposition device transport line 52. Is stored in the decomposed oil drum 6.
[0091]
The temperature of the thermally cracked oil stored in the cracked oil drum 6 is measured by a cracked oil drum internal thermometer 29, and the measured value is sent from the cracked oil drum internal thermometer 29 to the additional oil device 12.
[0092]
Then, the thermally cracked oil is sent from the cracked oil drum 6 to the in-oil sludge separation device 7 via the drum cracked oil transport line 54. At this time, a part of the pyrolysis oil flowing through the drum cracking oil transport line 54 flows into the mixed oil analysis port 60, and the organic acid amount of the pyrolysis oil at the mixed oil analysis port 60 is measured by the mixed oil organic acid amount analyzer 39. Measured. Then, the measured value of the organic acid amount is sent from the mixed oil organic acid amount analyzer 39 to the additional oil device 12.
[0093]
Thereafter, the pyrolysis oil is sludge removed in the oil-in-sludge separation device 7 to be refined into separated oil. A part of the separated oil discharged from the oil-in-oil sludge separation device 7 is sent to the cracked gas ejector 13 via the return line 55, and the other separated oil is sent to the refinery equipment via the separated oil tank 8. .
[0094]
Incidentally, the additional oil device 12 injects the cracked oil drum 6 based on the measurement value sent from the cracked oil drum internal thermometer 29 and the measurement value sent from the mixed oil organic acid amount analyzer 39. Determine the amount of additional oil to be injected. That is, based on the temperature of the thermally decomposed oil in the decomposed oil drum 6 and the amount of organic acid in the decomposed oil discharged from the decomposed oil drum 6, the additional oil device 12 Determine the amount of additional oil to be injected to obtain the appropriate oil quality. Specifically, for example, when the measurement value sent from the mixed oil organic acid amount analyzer 39 is higher than the predetermined level organic acid amount, the injection amount of the additional oil increases, and the predetermined level organic acid amount If it is lower than this, the injection amount of the additional oil decreases.
[0095]
Then, the additional oil device 12 adjusts the additional oil supply amount adjusting valve 37 based on the determined additional oil injection amount, and injects additional oil from the additional oil injection nozzle 40 to the return line 55 via the additional oil line 59. .
[0096]
At this time, the flow rate of the additional oil flowing through the additional oil line 59 is measured by the additional oil supply flow meter 36, and the measured value is sent to the additional oil device 12. Then, the additional oil device 12 adjusts the additional oil supply amount adjusting valve 37 based on the measurement value sent from the additional oil supply flow meter 36, and adjusts the injection amount of the additional oil to be injected into the return line 55 in a feedback manner. are doing.
[0097]
The additional oil injected into the return line 55 is sent to the cracked gas ejector 13 together with the separated oil from the in-oil sludge separation device 7 flowing through the return line 55. Then, the cracking gas ejector 13 sprays and injects additional oil to the pyrolysis oil discharged from the pyrolysis device 5 and flowing through the decomposition device transport line 52 together with the cooling oil (separated oil). Then, while the pyrolysis oil flows through the cracking device transport line 52 and is stored in the cracking oil drum 6, the composition of the pyrolysis oil is adjusted by the injected additional oil. Thus, the pyrolysis oil discharged from the pyrolysis device 5 is adjusted to a certain level of oil quality.
[0098]
As described above, according to the present embodiment, the additional oil device 12 injects a predetermined amount of additional oil into the return line 55 to adjust the components of the pyrolysis oil sent from the pyrolysis device 5 to the cracking oil drum 6. By doing so, the pyrolysis oil is adjusted to a certain level of oil quality. Thereby, it is possible to effectively prevent the waste plastic processing apparatus 1 and various devices of the refinery equipment from being contaminated or corroded by the pyrolysis oil or the separation oil. Also, when feedstock recycling is performed using pyrolysis oil or separated oil discharged from the waste plastic processing apparatus 1, high-quality and stable feedstock recycling can be performed.
[0099]
In particular, since the injection amount of the additional oil is determined based on the temperature of the thermally decomposed oil in the decomposed oil drum 6 and the organic acid amount of the thermally decomposed oil discharged from the decomposed oil drum 6, The temperature of the thermally decomposed oil in the inside can be appropriately adjusted, and the amount of the organic acid in the thermally decomposed oil discharged from the decomposed oil drum 6 can be appropriately adjusted.
[0100]
Since the additional oil is injected into the pyrolysis oil from the cracked gas ejector 13 together with the cooling oil (separated oil), it is preferable that the additional oil has an effect as a cooling oil. That is, it is preferable to adjust the temperature of the additional oil to a predetermined temperature to promote cooling and condensation of the pyrolysis oil into which the additional oil has been injected.
[0101]
Further, the mixed oil organic acid amount analyzer 39 may be attached to the cracked oil drum 6 instead of the drum cracked oil transport line 54. In this case, the amount of organic acid in the thermally decomposed oil in the cracked oil drum 6 is measured by the mixed oil organic acid amount analyzer 39, and the measured value is sent from the mixed oil organic acid amount analyzer 39 to the additional oil device 12. Then, the additional oil device 12 determines the injection amount of the additional oil based on the organic acid amount of the thermally decomposed oil in the decomposed oil drum 6 and injects the additional oil into the return line 55. Also in this case, the above-described operation and effect of the present embodiment can be obtained, and the components of the thermally decomposed oil in the decomposed oil drum 6 are adjusted by the additional oil, and the thermally decomposed oil is adjusted to a certain level of oil quality. .
[0102]
The additional oil device 12 is connected to the cracking device transport line 52, and a predetermined amount of additional oil is injected into the pyrolysis oil discharged from the pyrolysis device 5 to the cracking device transport line 52 to adjust the components of the pyrolysis oil. Also in this case, the same effect as the effect in the present embodiment can be obtained.
[0103]
【The invention's effect】
As described above, according to the present invention, the pyrolysis oil generated by thermally decomposing waste plastic is cooled to a predetermined temperature by a cooling mechanism in the decomposition oil drum, and thereby the sludge contained in the pyrolysis oil is decomposed by the decomposition oil drum. From the pyrolysis oil in the oil-in-oil sludge can be effectively removed. Thus, the oil quality of the pyrolysis oil can be improved, and the waste plastic processing apparatus can perform stable waste plasticization.
[0104]
In addition, the oil quality of the pyrolysis oil is appropriately adjusted by injecting a predetermined amount of the additional oil into the pyrolysis oil generated by thermally decomposing the waste plastic using an additional oil device and adjusting the components of the pyrolysis oil. Can be. Therefore, by adjusting the injection amount of the additional oil to the pyrolysis oil, the oil quality of the pyrolysis oil can be improved, and the waste plastic processing apparatus can perform the stable plasticization of the waste plastic.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram of a waste plastic processing apparatus according to a first embodiment of the present invention.
FIG. 2 is a system configuration diagram of a waste plastic processing apparatus according to a second embodiment of the present invention.
FIG. 3 is a system configuration diagram of a waste plastic processing apparatus according to a third embodiment of the present invention.
FIG. 4 is a system configuration diagram of a waste plastic processing apparatus according to a fourth embodiment of the present invention.
[Explanation of symbols]
1) Waste plastic processing equipment
2) Waste plastic hopper
3 Waste plastic metering machine
4 Thermal decomposition equipment input machine
4a Motor for driving pyrolysis equipment
5 Pyrolysis unit
5a Pyrolysis device drive motor
6 Cracked oil drum
6a @ bottom of cracked oil drum
7 Sludge separation device in oil
8 Separated oil tank
10 ° cooling mechanism
11 Sludge washing injection nozzle
12 additional oil device
13 decomposition gas ejector
15 reflux tower
19 Separated oil shipping pump
20mm waste plastic input valve
21 Pyrolysis device combustion burner
22 Residue outlet
23 Residue cooling conveyor
24mm residue discharge valve
25 residue storage hopper
26 Residue storage container
Vacuum pump for 27 mm drum
28 ° cracked oil pump
29 Cracked oil drum internal thermometer
30 cracked oil drum internal level meter
31mm return valve
32mm return line adjustment device
33mm return line flow meter
34 tank supply valve
35 cleaning pump
36mm additional oil supply flow meter
37mm additional oil supply control valve
38 mixed oil pH analyzer
39 mixed oil organic acid analyzer
40 additional oil injection nozzle
50 storage tube
51 Residue transfer line
52 disassembly equipment transport line
53 drum gas transfer line
54 drum cracked oil transfer line
55 return line
56 tank transfer line
57 shipping line
58 mm washing oil line
59 additional oil line
60 ° mixed oil analysis port

Claims (11)

Having a heating means, a pyrolysis device that heats the waste plastic to be input and pyrolyzes into pyrolysis oil and pyrolysis residue;
A cracked oil drum connected to the cracking device and storing the cracked oil sent from the cracking device;
A sludge separation unit in oil connected to the cracked oil drum and removing sludge in the thermally cracked oil sent from the cracked oil drum to generate separated oil;
Using the separated oil that is provided between the pyrolysis unit and the cracked oil drum and sent from the sludge separation unit in oil via the return line, the pyrolysis oil discharged from the pyrolysis unit is cooled and condensed. A cracked gas ejector,
A cooling mechanism attached to the cracked oil drum to cool the thermally cracked oil in the cracked oil drum to a predetermined temperature;
Waste plastic processing equipment characterized by comprising: Further comprising a pyrolysis oil temperature measuring device that measures the temperature of the pyrolysis oil in the cracking oil drum and sends the measured value to the cooling mechanism;
The cooling mechanism cools the cracked oil in the cracked oil drum based on the measurement value sent from the cracked oil temperature measuring device so that the cracked oil in the cracked oil drum has a temperature equal to or higher than the pour point. The waste plastic processing apparatus according to claim 1, wherein: 3. The waste plastic processing apparatus according to claim 1, wherein the cooling mechanism uses water as a cooling source when cooling the thermally decomposed oil in the decomposed oil drum. 4. A pyrolysis oil temperature measuring device for measuring the temperature of the pyrolysis oil in the cracking oil drum,
A pyrolysis oil level measuring device for measuring the level of the pyrolysis oil in the cracked oil drum,
Connected to the pyrolysis oil temperature measurement device and the pyrolysis oil level measurement device, and based on the measurement value sent from the pyrolysis oil temperature measurement device and the measurement value sent from the pyrolysis oil level measurement device, A return line adjustment device for adjusting the amount of separated oil sent from the middle sludge separation device to the cracked gas ejector via the return line,
The waste plastic processing apparatus according to claim 1, further comprising: The bottom of the cracked oil drum has a predetermined slope, and the sludge in the cracked oil drum flows along the sloped bottom of the cracked oil drum. A waste plastic processing apparatus according to any one of the preceding claims. An injection nozzle for sludge washing is attached to the cracked oil drum,
The in-oil sludge separation device and the sludge washing injection nozzle are connected by a washing oil line,
Separation oil is sent from the oil-in-sludge separation device to the sludge washing injection nozzle via the washing oil line, and the separated oil is ejected from the sludge washing injection nozzle into the cracked oil drum to wash the sludge in the cracked oil drum. The waste plastic processing apparatus according to any one of claims 1 to 5, wherein: Having a heating means, a pyrolysis device that heats the waste plastic to be input and pyrolyzes into pyrolysis oil and pyrolysis residue;
A cracking oil drum connected to the cracking device via the cracking device transport line and storing the cracking oil sent from the cracking device;
A sludge separation unit in oil connected to the cracked oil drum and removing sludge in the thermally cracked oil sent from the cracked oil drum to generate separated oil;
Cooled and condensed the pyrolysis oil discharged from the pyrolysis unit using the separated oil that is provided between the pyrolysis unit and the cracked oil drum and sent from the sludge separation unit in oil via the return line. A cracked gas ejector,
Additional oil that is connected to at least one of the cracking device transport line, return line, and cracking oil drum, and adjusts the components of the cracking oil by injecting a predetermined amount of additional oil into the cracking oil discharged from the cracking device Equipment and
Waste plastic processing equipment characterized by comprising: Further comprising a pyrolysis oil temperature measuring device for measuring the temperature of the pyrolysis oil in the cracking oil drum,
The waste plastic processing apparatus according to claim 7, wherein the additional oil device determines an injection amount of the additional oil to be added to the pyrolysis oil based on a measurement value sent from the pyrolysis oil temperature measurement device. . Further provided with a characteristic measuring device for measuring the characteristics of the pyrolysis oil in the cracking oil drum or the pyrolysis oil sent from the cracking oil drum to the in-oil sludge separation device,
9. The additional oil device according to claim 7, wherein the additional oil device determines an injection amount of the additional oil to be added to the pyrolysis oil based on a measurement value sent from the characteristic measuring device. Waste plastic processing equipment. The waste plastic processing apparatus according to claim 9, wherein the characteristic of the pyrolysis oil measured by the characteristic measuring device is a pH of the pyrolysis oil. The waste plastic processing apparatus according to claim 9, wherein the characteristic of the pyrolysis oil measured by the characteristic measuring device is an amount of organic acid in the pyrolysis oil.

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