JP5113396B2 - Pyrolysis treatment system - Google Patents

Description

  The present invention relates to a thermal decomposition processing system that includes a thermal decomposition apparatus and thermally decomposes an organic substance processing material put into a thermal decomposition furnace of the thermal decomposition apparatus into a thermal decomposition gas and a residue.

  In recent years, various methods have been proposed for applying predetermined processing to wastes such as plastics discharged in large quantities and using them as resources. In addition, as an example, pyrolysis treatment of organic matter processing materials such as biomass (wood, sludge, livestock manure, garbage, etc.) and waste plastics produces pyrolysis gas and pyrolysis residue, and pyrolysis gas It is considered that the oil is recovered as cracked oil by condensing and used as carbide by subjecting the residue to a predetermined treatment. Among these, when waste plastic is used as the organic material treatment material, the cracked oil can be recovered with high efficiency. Many proposals have been made on waste plastic processing apparatuses for pyrolyzing and converting such waste plastics (for example, see Patent Document 1).

  In the waste plastic processing apparatus shown in Patent Document 1, a thermal decomposition apparatus is an important device. If the treatment material can be continuously charged into the pyrolyzer and the residue can be discharged continuously, a continuous treatment type simple and efficient pyrolyzer can be provided. However, when the pyrolysis process is continuously performed, the pyrolysis gas is continuously discharged from the pyrolysis apparatus, so that some residual components are mixed in the pyrolysis gas, and if this pyrolysis gas is condensed, the pyrolysis oil There is a problem that the residue is mixed in as sludge.

Accumulation of this sludge component may affect downstream equipment. For example, sludge accumulates in the pump and causes wear, and when used as fuel for a boiler, the sludge is mixed into the burner nozzle and the nozzle is worn.
JP 2000-167833 A

  The present invention has been made in consideration of such points, and the pyrolysis gas is continuously discharged from the continuous pyrolysis apparatus, and some residual components are mixed in the pyrolysis gas. However, it is an object of the present invention to provide a pyrolysis system that does not cause problems such as sludge wear and accumulation in downstream equipment and uses of pyrolysis oil, and that can increase the overall thermal efficiency.

The present invention includes a pyrolysis furnace, a pyrolysis apparatus that pyrolyzes an organic substance treatment material put into the pyrolysis furnace into pyrolysis gas and residue, and pyrolysis gas generated in the pyrolysis furnace. A pyrolysis gas ejector that condenses to produce cracked oil, a cracked oil separator that stores cracked oil produced by the pyrolysis gas ejector, a cracked oil cooler that cools cracked oil from the cracked oil separator, It is equipped with a heating device that heats the inside of the pyrolysis furnace of the pyrolysis device to the pyrolysis temperature. A circulation pump is installed between the cracked oil separator and the cracked oil cooler, and the cracked oil is cooled by the cracked oil cooler. After that, it is returned to the pyrolysis gas ejector via the return line to serve as a condensation cooling source for the pyrolysis gas ejector, and a cracking oil separator, circulation pump, cracking oil cooler, return line and pyrolysis gas ejector form a circulation line. , Minute in cracked oil separator The off-gas is separated discharged from the oil sucked by the off-gas suction ejector, the heating source sent to the heating device to the heating device, cracked oil tank cracked oil in cracked oil separator via a circulation pump and cracked oil cooler In the cracked oil tank, a plurality of flow paths partitioned by a partition plate and communicating with each other are formed, and a drain pipe for extracting sludge is provided at the lower part of each flow path. It is a thermal decomposition processing system characterized in that a decanter for removing sludge is installed in the piping .

The present invention includes a pyrolysis furnace, a pyrolysis apparatus that pyrolyzes an organic substance treatment material put into the pyrolysis furnace into pyrolysis gas and residue, and pyrolysis gas generated in the pyrolysis furnace. A pyrolysis gas ejector that condenses to produce cracked oil, a cracked oil separator that stores cracked oil produced by the pyrolysis gas ejector, and a cracked oil cooler that cools cracked oil from the cracked oil separator; And a heating device for heating the inside of the pyrolysis furnace of the pyrolysis device to a pyrolysis temperature, and a circulation pump is installed between the cracked oil separator and the cracked oil cooler, and the cracked oil is After cooling, it is returned to the pyrolysis gas ejector via the return line and used as a condensation cooling source for the pyrolysis gas ejector. A cracking oil separator, circulation pump, cracking oil cooler, return line and pyrolysis gas ejector form a circulation line. And inside cracked oil separator By controlling a constant level of the cracked oil by liquid level adjusting mechanism, the cracked oil in the cracked oil separator via a circulation pump and cracked oil cooler and discharged to the decomposed oil tank, the cracked oil in the tank, A plurality of flow paths that are partitioned by the partition plate and communicate with each other are formed, drain pipes for extracting the sludge are provided at the bottom of each flow path, and a decanter that removes the sludge in the piping from the cracked oil tank to the user is provided. It is the thermal decomposition processing system characterized by being installed .

  In the present invention, the liquid level adjustment mechanism is composed of a liquid level meter installed in the cracked oil separator and an on-off valve provided between the cracked oil cooler and the cracked oil tank, and is installed in the cracked oil separator. The thermal decomposition processing system is characterized in that the open / close valve is controlled by a controller based on the signal from the liquid level gauge.

  The present invention is a thermal decomposition treatment system characterized in that an A heavy oil (kerosene, light oil, etc.) charging section capable of injecting A heavy oil (kerosene, light oil, etc.) into the circulation line and cracked oil tank is provided.

  In the present invention, a heating mechanism is installed in the circulation line and the cracked oil tank, steam is generated as a boiler heating source using off-gas separated and discharged from the cracked oil in the cracked oil separator, and this steam is used as the heating mechanism. It is a thermal decomposition processing system characterized by sending.

  According to the present invention, in the continuous pyrolysis apparatus, when the pyrolysis gas is condensed, even if the residue is mixed in the pyrolysis oil as sludge, the downstream equipment and the use destination of the pyrolysis oil There will be no problems such as sludge wear or accumulation. For this reason, it is possible to provide a thermal decomposition system that can be simply and stably processed and can improve the overall thermal efficiency.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 3 are views showing an embodiment of a thermal decomposition processing system according to the present invention.

  1 to 3, the pyrolysis processing system 10 has a pyrolysis furnace 11a, and converts an organic substance processing material (raw material) 42 such as waste plastics into the pyrolysis furnace 11a into pyrolysis gas and residue. A thermal decomposition apparatus 11 that performs thermal decomposition, a thermal decomposition gas ejector 16 that generates thermal decomposition gas by condensing the thermal decomposition gas generated in the thermal decomposition furnace 11a, and decomposition oil generated by the thermal decomposition gas ejector 16 are stored. And a cracked oil separator 17.

  Among these, an outlet gas scraper 15 for removing sludge in the pyrolysis gas from the pyrolysis device 11 is installed between the pyrolysis device 11 and the pyrolysis gas ejector 16.

  Moreover, the residue from the thermal decomposition apparatus 11 is discharged | emitted outside via the residue cooler 12 and the residue storage container 13. FIG.

  In addition, an organic material is introduced into the thermal decomposition furnace 11a of the thermal decomposition apparatus 11.

  That is, the organic material 42 is crushed and granulated and sent into the material receiving container 44. Thereafter, the organic matter processing material 42 is put into the pyrolysis furnace 11a through the waste plastic receiving conveyor 45, the material weighing hopper 29, the material feeding hopper 28, and the pyrolysis device material feeding machine 27.

  The hot air generated in the hot air generator 30 is sent to the pyrolysis furnace 11a of the thermal decomposition apparatus 11 through the hot air circulation blower 31, and the pyrolysis furnace 11a is heated by the hot air. In addition, dilution air is sent from the combustion gas dilution blower 46 to the downstream side of the hot air circulation blower 31, and the heating temperature of the pyrolysis furnace 11a is adjusted.

  Further, the air sent from the combustion air blower 35 is heated by the off-gas combustion air heater 34 and then supplied to the hot air generating furnace 30. Further, offgas is discharged from the cracked oil stored in the cracked oil separator 17, and this offgas is sucked by the offgas suction ejector 33 and then sent to the hot air generating furnace 30. During this time, the combustion air is sent to the hot air generating furnace 30 via the off gas combustion air blower 35 and the combustion air heater 34, and the off gas and the combustion air are combusted in the hot air generating furnace 30 to generate hot air.

  In this case, the inside of the pyrolysis furnace 11a is heated by the hot air generating furnace 30 that generates hot air and the hot air circulation blower 31 that sends the hot air generated in the hot air generating furnace 30 to the pyrolysis furnace 11a to heat the pyrolysis furnace 11a. The heating devices 30 and 31 are configured.

  The hot air sent into the pyrolysis furnace 11a is returned to the hot air circulation blower 31 through the exhaust gas line 32 and then sent again to the pyrolysis furnace 11a for circulation. On the other hand, the hot air in the exhaust gas line 32 is discharged into the atmosphere as exhaust gas. The hot air generating furnace 30 is also supplied with LPG and is used as a combustion gas together with the off gas supplied from the off gas suction ejector 33. The vent gas discharged from the pyrolysis furnace 11 a of the pyrolysis furnace device 11 is discharged into the atmosphere via the knockout drum 40.

  By the way, a circulating pump 18 and a cracked oil cooler 19 are sequentially connected to the downstream side of the cracked oil separator 17, and the cracked oil stored in the cracked oil separator 17 passes through the circulating pump 18 to be the cracked oil cooler. 19 is cooled. The cracked oil cooled in the cracked oil cooler 19 is then returned to the pyrolysis gas ejector 16 via the return line 25a.

  The cracking oil separator 17, the circulation pump 18, the cracking oil cooler 19, and the return line 25a constitute a circulation line 25.

  Furthermore, a cracked oil tank 22 is connected to the cracked oil cooler 19 through an on-off valve 21, and the cracked oil in the cracked oil tank 22 is supplied to the cracked oil via a pump 23 provided in a pipe 48. It is sent to the decanter 24 to remove sludge in the cracked oil.

  The cracked oil from which the sludge has been removed by the decanter 24 is then sent to the user.

  Further, the off gas from the cracked oil separator 17 is sent to the boiler 49, where the off gas burns to generate steam. The steam generated in the boiler 49 is sent to a circulation line 25 including a cracked oil separator 17, a circulation pump 18 and a cracked oil cooler 19 through a steam line 26, and the cracked oil separator 17 and the circulation pump 18. And the cracked oil cooler 19 is heated. Steam from the boiler 49 is sent to the cracked oil tank 22 and the pump 23 via the steam line 26 to heat the cracked oil tank 22 and the pump 23.

  The heating mechanisms 49 and 26 are configured by the boiler 49 and the steam line 26 that supplies steam generated in the boiler 49.

  Next, the cracked oil separator 17 and the cracked oil tank 22 will be described in detail with reference to FIGS. As shown in FIG. 2, the cracked oil separator 17 is provided with a liquid level gauge 17a, and a signal from the liquid level gauge 17a is sent to the controller 21a of the on-off valve 21, and the on-off valve 21 is sent by the controller 21a. Is opened and closed. In this way, a part of the cracked oil in the cracked oil separator 17 is circulated in the circulation line 25 via the circulation pump 18 and the cracked oil cooler 19 while the liquid level in the cracked oil separator 17 is controlled to be constant. Let On the other hand, the remainder of the cracked oil is sent from the on-off valve 21 to the cracked oil tank 22 side. The liquid level gauge 17a and the on-off valve 21 constitute liquid level adjusting mechanisms 17a and 21 for the cracked oil tank 22.

  Further, as shown in FIGS. 3A and 3B, the cracked oil tank 22 is formed with a plurality of flow paths 22e that are partitioned by a partition plate 22a and communicate with each other. Here, FIG. 3A is a side view showing the cracked oil tank 22, and FIG. 3B is a plan view showing the cracked oil tank 22.

  As shown in FIGS. 3A and 3B, the cracked oil that flows into the cracked oil tank 22 from the inlet 22b flows in a zigzag manner in the flow path 22e and is discharged from the outlet 22c.

  Thus, while the cracked oil flows in a zigzag manner in the flow path 22e, sludge in the cracked oil accumulates at the bottom of the flow path 22e. The sludge accumulated at the bottom of the flow path 22e is then discharged outward from the drain pipe 22d.

  The return line 25a of the circulation line 25 and the cracked oil tank 22 are provided with A heavy oil (kerosene, light oil, etc.) input portions 50, 51, respectively, and from these A heavy oil input portions 50, 51 to A heavy oil (kerosene, light oil). Etc.).

  Next, the operation of the present embodiment having such a configuration will be described.

  First, an organic substance processing material (raw material) such as waste plastic is crushed and granulated and received in the material receiving container 44. Thereafter, the organic material is fed from the waste plastic receiving conveyor 45 through the material weighing hopper 29 and the material charging hopper 28 and from the pyrolysis device material charging machine 27 to the thermal decomposition furnace 11a of the thermal decomposition device 11.

  On the other hand, the hot air generated in the hot air generating furnace 30 is sent into the thermal decomposition furnace 11a of the thermal decomposition apparatus 11 through the thermal circulation blower 31, and the organic matter processing material is thermally decomposed in the thermal decomposition furnace 11a. The

  In this case, when the organic material is thermally decomposed in the pyrolysis furnace 11a, pyrolysis gas and residue are generated. The pyrolysis gas in the pyrolysis furnace 11a is sent to the pyrolysis gas ejector 16, and the pyrolysis gas directly contacts the cracked oil sent from the cracked oil cooler 19 via the return line 25a. It is condensed to produce cracked oil. The cracked oil produced in the pyrolysis gas ejector 16 is then sent to the cracked oil cooler 19 via the cracked oil separator 17 and the circulation pump 18.

  A part of the cracked oil in the cracked oil cooler 19 is sent to the pyrolysis gas ejector 16 through the return line 25a as described above, and is provided as a cooling source for condensing the pyrolysis gas. The remainder of the cracked oil in the cracked oil cooler 19 is sent to the cracked oil tank 22 via the on-off valve 21.

  During this time, the liquid level in the cracked oil separator 17 is kept constant by the on-off valve 21. Further, the offgas discharged from the cracked oil in the cracked oil separator 17 is sucked by the offgas suction ejector 33 and sent into the hot air generating furnace 30, and used as fuel (heating source) for the hot air generating furnace 30.

  The cracked oil in the cracked oil tank 22 is sent to the cracked oil decanter 24 via the pump 23, and after sludge is removed in the decanter 24, the cracked oil is supplied to the user.

  Meanwhile, the cracked oil tank 22 is partitioned by a partition plate 22a, and a plurality of flow paths 22e communicating with each other are formed. The cracked oil flowing into the cracked oil tank 22 from the inlet 22b flows in a zigzag manner in the flow path 22e of the cracked oil tank 22, and is then discharged from the outlet 22c. During this time, when cracked oil flows in the flow path 22e, sludge in the cracked oil accumulates at the bottom of the flow path 22e, and then the sludge in the flow path 22e is discharged outward through the drain pipe 22d.

  For this reason, sludge can be effectively discharged from the cracked oil sent from the cracked oil tank 22 to the decanter 24 via the pump 23. Further, after the sludge in the cracked oil is discharged by the decanter 24, clean cracked oil is removed. Can be supplied to users.

  As described above, according to the present embodiment, in the continuous pyrolysis apparatus, when the pyrolysis gas is condensed, even if residues are mixed in the cracked oil as sludge, downstream equipment and cracked oil There will be no problems such as wear and accumulation of equipment due to sludge at the usage site. For this reason, the thermal decomposition system which can be processed simply and stably can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic which shows one Embodiment of the thermal decomposition processing system by this invention. The figure which shows a cracked oil separator and a liquid level adjustment mechanism. Detailed view showing the inside of the cracked oil tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Pyrolysis processing system 11 Pyrolysis apparatus 11a Pyrolysis furnace 12 Residue cooler 13 Residue storage container 16 Pyrolysis gas ejector 17 Decomposition oil separator 17a Level gauge 18 Circulation pump 19 Decomposition oil cooler 21 On-off valve 21a Controller 22 Decomposed oil tank 22a Partition plate 22b Inlet 22c Outlet 22d Drain pipe 22e Flow path 23 Pump 24 Decanter 25 Circulation line 25a Return line 30 Hot air generator 31 Hot air circulation blower 32 Exhaust gas line 33 Off-gas suction ejector 48 Piping 49 Boiler 50, 51 A heavy oil (Kerosene, light oil, etc.) input section

Claims (5)

A pyrolysis apparatus that has a pyrolysis furnace and pyrolyzes the organic processing material put into the pyrolysis furnace into pyrolysis gas and residue;
A pyrolysis gas ejector that condenses the pyrolysis gas generated in the pyrolysis furnace to produce cracked oil;
A cracked oil separator for storing cracked oil generated by a pyrolysis gas ejector;
A cracked oil cooler for cooling cracked oil from the cracked oil separator;
A heating device for heating the inside of the pyrolysis furnace of the pyrolysis device to a pyrolysis temperature,
A circulation pump is installed between the cracked oil separator and the cracked oil cooler, and after the cracked oil is cooled by the cracked oil cooler, it is returned to the pyrolysis gas ejector via the return line, and the pyrolysis gas ejector is condensed and cooled. As a source,
A cracking oil separator, circulation pump, cracking oil cooler, return line and pyrolysis gas ejector form a circulation line,
The off-gas separated and discharged from the cracked oil in the cracked oil separator is sucked by the off-gas suction ejector and sent to the heating device as the heating source of the heating device ,
The cracked oil in the cracked oil separator is discharged to the cracked oil tank through the circulation pump and cracked oil cooler,
In the cracked oil tank, a plurality of flow paths partitioned by a partition plate and communicating with each other are formed, and a drain pipe for extracting sludge is provided at the lower part of each flow path,
A pyrolysis treatment system, wherein a decanter for removing sludge is installed in a pipe from a cracked oil tank to a user . A pyrolysis apparatus that has a pyrolysis furnace and pyrolyzes the organic processing material put into the pyrolysis furnace into pyrolysis gas and residue;
A pyrolysis gas ejector that condenses the pyrolysis gas generated in the pyrolysis furnace to produce cracked oil;
A cracked oil separator for storing cracked oil generated by the pyrolysis gas ejector;
A cracked oil cooler for cooling cracked oil from the cracked oil separator;
A heating device for heating the inside of the pyrolysis furnace of the pyrolysis device to a pyrolysis temperature,
A circulation pump is installed between the cracked oil separator and the cracked oil cooler, and after the cracked oil is cooled by the cracked oil cooler, it is returned to the pyrolysis gas ejector via the return line, and the pyrolysis gas ejector is condensed and cooled. As a source,
A cracking oil separator, circulation pump, cracking oil cooler, return line and pyrolysis gas ejector form a circulation line,
The liquid level of the cracked oil in the cracked oil separator is controlled to be constant by the liquid level adjusting mechanism, and the cracked oil in the cracked oil separator is discharged to the cracked oil tank through the circulation pump and the cracked oil cooler ,
In the cracked oil tank, a plurality of flow paths partitioned by a partition plate and communicating with each other are formed, and a drain pipe for extracting sludge is provided at the lower part of each flow path,
A pyrolysis treatment system, wherein a decanter for removing sludge is installed in a pipe from a cracked oil tank to a user .   The liquid level adjustment mechanism is composed of a liquid level gauge installed in the cracked oil separator and an on-off valve provided between the cracked oil cooler and the cracked oil tank, and the liquid level installed in the cracked oil separator. The thermal decomposition processing system according to claim 2, wherein the on-off valve is controlled by a controller based on a signal from the meter. The thermal decomposition treatment system according to any one of claims 1 to 3 , characterized in that an A heavy oil charging unit capable of injecting A heavy oil is provided in the circulation line and the cracked oil tank. A heating mechanism is installed in the circulation line and cracked oil tank,
A heating source of the boiler using the off-gas separated discharged from cracked oil separator decomposition oil, to generate steam, according to any of claims 1及至3, characterized in that sending this steam to the heating mechanism Pyrolysis treatment system.

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