JP2008297470A - Thermal decomposition oil recovery system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that in conventional methods fractionating recovered thermal decomposition oil obtained by thermal decomposition of a mixture of organic materials, depending on the characters the system tends to be a complicated system. <P>SOLUTION: The thermal decomposition oil recovery system which recovers thermally decomposed oil from generated thermally decomposed gas, comprises a first step thermal decomposition oil recovery loop 12 having a thermal decomposition gas ejector 14a condensing the thermal decomposition gas generated by thermally decomposing mixed organic materials with a recovered decomposition oil, a decomposed oil tank 15a storing the condensed thermal decomposition oil, and a decomposition oil coolor 18a for cooling the condensed thermally decomposed oil, and a second step thermal decomposition oil recovering loop 13 having a thermal decomposition gas ejector 14b condensing the thermal decomposition gas which could not be condensed by the thermal decomposition gas ejector with the decomposition oil, a decomposition oil tank 15b storing the condensed thermally decomposed oil condensed by the gas ejector and a decomposition oil cooler 18b cooling the thermally decomposed oil. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pyrolysis oil recovery system that recovers oil from a pyrolysis gas generated by pyrolyzing a mixed organic matter treatment material.

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 treatment materials such as biomass (wood, sludge, livestock manure, garbage, etc.) and waste plastic produces pyrolysis gas and pyrolysis residue. It is considered that it is recovered as a pyrolysis oil by condensing, and the residue is used as a carbide by performing a predetermined treatment.
Among these, when waste plastic is used as the organic material treatment material, pyrolyzed oil can be recovered with high efficiency. Therefore, many proposals have been made and put to practical use regarding an apparatus for pyrolyzing oil into such waste plastic. For example, Patent Documents 1 to 3 are known as such devices.

  In addition, as a method of producing high-value-added carbon from organically processed products such as biomass and waste, the organically processed products are rapidly pyrolyzed and then rapidly cooled to liquefy them to remove impurities contained in the liquefied products. An apparatus has been proposed in which the liquefied product is introduced into a high-temperature furnace in a reducing atmosphere to generate nanocarbon by a vapor phase growth method. There has also been proposed an apparatus for generating nanocarbon by vapor phase growth by putting pyrolysis gas into a high-temperature furnace in a reducing atmosphere after pyrolysis.

  In this pyrolysis technology, if the treatment material is not a single material, for example, RPF (Refuse Paper & Plastic Fuel) manufactured from mixed waste materials (materials mixed with paper and plastics) from packaging factories, etc. Or, if mixed waste materials such as waste plastic and wood mixed from building materials factories are pyrolyzed together, the paper, wood, etc. will heat up in the low temperature region due to the difference in the thermal decomposition temperature between plastics and paper, wood, etc. It is decomposed and plastics are thermally decomposed in a high temperature region.

  Further, the pyrolyzed oil collected in a collective manner is collected by being mixed with light oil and heavy oil with a large amount of tar, depending on the mixing ratio of plastics and paper, wood, and the like. Although the characteristics differ depending on the thermal decomposition temperature of the mixed waste material, light oils have a low pour point and are fluid and easy to burn at room temperature. In addition, heavy oils with a high tar content are mixed with fine solids, have a high pour point, are not fluid at ordinary temperatures, and are difficult to burn with a normal burner. Thus, light and heavy oils have their own characteristics.

  For this reason, it is difficult to handle the cracked oil collected by thermally decomposing the mixed waste material. Therefore, when the recovered cracked oil is transferred from the storage tank by a pump, only light oil can be transferred unless well stirred, and heavy oil with a large amount of tar cannot be transferred. Alternatively, when the product oil is burned, light oils burn well, but heavy oils with a high tar content may affect the equipment downstream. For example, sludge accumulates in the pump and causes wear, accumulates in the heat exchanger, and when used as fuel for a boiler, tar is mixed into the burner nozzle and the nozzle wears out. Problem arises.

  In addition, since a large amount of impurities are mixed in the sludge, a large amount of impurities tend to be mixed in heavy cracked oil with a large amount of tar. For this reason, among the cracked oils, light cracked oil has few impurities, and it is possible to generate nanocarbon by vapor phase growth method by putting the light cracked oil into a high temperature furnace in a reducing atmosphere. There is also a problem that it is difficult to produce nanocarbon with heavy cracked oil with a large amount.

Furthermore, to fractionate the recovered cracked oil into light cracked oil and heavy cracked oil, the sludge is separated and removed by sludge removal means such as a sludge removal filter and centrifuge, and further distilled. It must be treated, distilled and separated by labor, and the equipment is complicated, and there are also major problems such as being unsuitable for the thermal decomposition continuous operation treatment.
Japanese Patent No. 3340412 Japanese Patent No. 3399764 Japanese Patent No. 3435399

  The present invention has been made in view of the above circumstances, and in a pyrolysis processing system for recovering oil from pyrolysis gas by thermally decomposing mixed organic material in which plastics, paper, wood, etc. are mixed, paper, wood The thermal decomposition oil A derived from thermal decomposition such as, and the thermal decomposition oil B derived from thermal decomposition of plastics, etc. Pyrolysis oil that can be recovered separately for each characteristic of pyrolysis oil such as pyrolysis oil B derived from pyrolysis of wood, etc. and pyrolysis oil C derived from pyrolysis of plastics, etc. The purpose is to provide a collection system.

  (1) The pyrolysis oil recovery system according to the present invention described in claim 1 is based on the pyrolysis gas produced by the pyrolysis apparatus that pyrolyzes the mixed organic matter processing material put into the pyrolysis apparatus into pyrolysis gas and residue. In the pyrolysis oil recovery system for recovering the oil, the first-stage pyrolysis gas ejector for directly spray-contacting and condensing the first-stage pyrolysis gas generated in the pyrolysis apparatus and led to the outside with the first-stage recovery cracked oil, and this first-stage heat First-stage pyrolysis oil recovery loop having a first-stage cracking oil tank that stores first-stage pyrolysis oil condensed in the cracked gas ejector, and a first-stage cracking oil cooler that cools the condensed first-stage pyrolysis oil, and first-stage pyrolysis oil recovery In the first-stage pyrolysis gas ejector that directly condenses the first-stage pyrolysis gas that could not be condensed in the first-stage pyrolysis gas ejector of the loop by spraying with the latter-stage cracking oil, and in this latter-stage pyrolysis gas ejector. A combination of a two-stage pyrolysis oil recovery loop having a latter-stage cracking oil tank that stores condensed latter-stage pyrolysis oil and a latter-stage pyrolysis oil recovery loop that cools the condensed latter-stage pyrolysis oil; The pyrolysis oil is recovered from the produced pyrolysis gas in two stages.

  (2) The pyrolysis oil recovery system according to the present invention as set forth in claim 2 is based on the pyrolysis gas produced by the pyrolysis apparatus that pyrolyzes the mixed organic matter treatment material put into the pyrolysis apparatus into pyrolysis gas and residue. In the pyrolysis recovery system for recovering oil, the first-stage pyrolysis gas ejector for directly spray-contacting and condensing the first-stage pyrolysis gas generated in the pyrolysis apparatus and led to the outside with the first-stage recovery cracked oil A first-stage cracked oil tank that stores the first-stage pyrolyzed oil condensed in the first-stage pyrolyzed gas ejector, and a first-stage cracked oil cooler that cools the condensed first-stage pyrolyzed oil A first-stage pyrolysis oil recovery loop, a second-stage pyrolysis oil recovery loop having the same equipment configuration as the first-stage pyrolysis oil recovery loop, and a downstream side of the second-stage pyrolysis oil recovery loop Same as the first stage pyrolysis oil recovery loop, provided at least one A combination of three or more pyrolysis oil recovery loops with an n-th stage pyrolysis oil recovery loop (where n is an integer of 3 or more) having such a device configuration, and pyrolysis oil in multiple stages from the generated pyrolysis gas It is characterized by collect | recovering.

  (3) The pyrolysis oil recovery system according to the present invention described in claim 3 is the system of (2), in which the first stage pyrolysis gas ejector in the first stage pyrolysis oil recovery loop is in direct spray contact. A set temperature of the first stage pyrolysis oil to be sprayed, a set temperature of the second stage pyrolysis oil to be directly brought into spray contact with the second stage pyrolysis gas ejector in the second stage pyrolysis oil recovery loop, and the n th It is possible to change the set temperature of the nth stage pyrolysis oil and the set temperature of the multistage pyrolysis oil that are directly sprayed in contact with the nth stage pyrolysis gas ejector in the staged pyrolysis oil recovery loop depending on the organic matter treatment material. It is characterized by that.

  (4) The pyrolysis oil recovery system according to the present invention described in claim 4 is the system according to (2) or (3), wherein the first stage pyrolysis gas ejector in the first stage pyrolysis oil recovery loop is used. Set circulation flow rate of the first stage pyrolysis oil to be directly spray contacted, and set circulation flow rate of the second stage pyrolysis oil to be directly spray contacted by the second stage pyrolysis gas ejector in the second stage pyrolysis oil recovery loop And the set circulation flow rate of the n-th stage pyrolysis oil and the set circulation flow rate of the multi-stage pyrolysis oil that are directly sprayed in contact with the n-th stage pyrolysis gas ejector in the n-th stage pyrolysis oil recovery loop It can be changed according to the processing material.

  (5) The pyrolysis oil recovery system according to the present invention as set forth in claim 5 is the system according to any one of the above (2) to (4), wherein condensation is performed in each stage or a specific number of pyrolysis oil recovery loops. An off-gas component that cannot be exhausted is utilized as an auxiliary fuel for a heating burner of a thermal decomposition apparatus.

  (6) The pyrolysis oil recovery system according to the present invention described in claim 6 is the system according to any one of the above (1) to (5), and is recovered by each of the stages or the pyrolysis oil recovery loop of a specific number of stages. The pyrolysis oil is used as the main fuel for the heating burner of the pyrolysis equipment, and it is highly value-added using the pyrolysis oil collected in the pyrolysis oil recovery loop of each stage different from this or a specific number of stages. It is characterized by being used for the production of carbon.

  According to the above invention, in the thermal decomposition processing system for thermally decomposing mixed organic material such as plastics, paper, wood, etc. and recovering oil from the pyrolysis gas, it is derived from thermal decomposition of paper, wood, etc. Separated and recovered into pyrolysis oil A and pyrolysis oil B derived from pyrolysis of plastics, etc., or derived from pyrolysis oil A derived from pyrolysis of paper, etc., and pyrolysis of wood, etc. It is possible to separate and recover the pyrolysis oil B and the pyrolysis oil C derived from the pyrolysis of plastics. Moreover, the simple pyrolysis oil collection | recovery system which can be collect | recovered separately for every characteristic of pyrolysis oil can be provided.

Furthermore, a pyrolysis oil recovery system with improved energy recovery efficiency is provided by utilizing off-gas components that cannot be condensed in the pyrolysis oil recovery stage as auxiliary fuel for the heating burner of the pyrolysis furnace. be able to.
Furthermore, by using pyrolysis oil collected in the pyrolysis oil recovery loop of a specific number of stages from the pyrolysis oil collected in the pyrolysis oil recovery stage, it is easy to produce high added value carbon. A system can be provided.

Hereinafter, the pyrolysis oil recovery system of the present invention will be described in more detail.
Next, embodiments of the present invention will be described with reference to the drawings. Note that the present embodiment is not limited to the content described below.
(First Embodiment): (Corresponding to Claim 1)
Reference is made to FIGS. Here, FIG. 1 (A) is a general view of the flow of the pyrolysis oil recovery system according to the first embodiment of the present invention, and FIG. 1 (B) is the first stage pyrolysis gas ejector of FIG. 1 (A). Detailed view is shown.

  Reference numeral 1 in the figure denotes a material feeding device, and a screw (not shown) driven by a motor 2 is arranged in the device 1. In the material input device 1, a mixed organic material (raw material) in which plastics, paper, wood, etc. are mixed is supplied from a raw material input hopper 3 by a circle feeder 5a and a first valve 6a. Supplied from the pipe 4a. In addition, the additive is supplied to the material charging device 1 from the additive charging hopper 7 through the second pipe 4b in which the circle feeder 5b and the first valve 6b are interposed.

  In the material charging apparatus 1, raw materials and additives (for example, slaked lime) charged by a screw that is rotated by driving of a motor 2 are mixed, and the mixed organic matter processing material is mixed in an adjacent pyrolysis furnace (pyrolysis apparatus) 8. Sent. A heater 9 is provided on the outer periphery of the pyrolysis furnace 8. A drum (not shown) that is driven and rotated by a motor 10 is installed in the pyrolysis furnace 8, and the mixed organic matter processing material supplied from the material charging device 1 is pyrolyzed in this drum.

  The mixed organic matter processing material charged into the pyrolysis furnace 8 is heated and decomposed by the heater 9 and separated into pyrolysis gas and residue. The residue is accommodated in the residue receiving container 11 through the third valve 6c. The generated pyrolysis gas is decomposed in two stages by the combination of two loops, a first stage pyrolysis oil recovery loop 12 and a second stage pyrolysis oil recovery loop 13 downstream of the loop 12. As condensed and recovered.

  The first-stage pyrolysis oil recovery loop 12 includes a first-stage pyrolysis gas ejector 14a, a first-stage cracking oil tank 15a, a fourth valve 6d, a fifth valve 6e, a filter 16, an oil circulation pump 17a, and a sixth The valve 6f and the first stage cracked oil cooler 18a are provided with a pipe 19a interposed in a loop shape in this order. The valves 6e and 6f are used as maintenance valves when the filter 16 is replaced. The branched pipe 19a from between the sixth valve 6f and the first stage cracking cooler 18a and the first stage cracked oil tank 15a are connected by a bypass pipe 18 having a seventh valve 6g interposed therebetween. Here, the bypass pipe 20 adjusts the flow rate of the condensed thermal cracked oil sent from the cracked oil tank 15a to the cracked oil cooler 18a.

  The pyrolysis gas ejector 14a has an injection spray nozzle 21 having injection holes (not shown) as shown in FIG. 1 (B), and the pyrolysis introduced from the pyrolysis furnace 8 as indicated by an arrow X. The recovered cracked oil is sent to the gas as indicated by the arrow Y and directly injected and contacted to directly cool and condense. The cracked oil tank 15a primarily stores the first-stage pyrolyzed oil condensed by the gas ejector 14a. The cooler 18a serves to cool the condensed first-stage pyrolysis oil after removing impurities by the filter 16. The pyrolysis gas that could not be condensed by the pyrolysis gas ejector 14a is supplied from the cracking oil tank 15a to the second stage pyrolysis gas ejector 14b as indicated by an arrow Z.

  The second stage pyrolysis oil recovery loop 13 includes a second stage pyrolysis gas ejector 14b, a second stage cracking oil tank 15b, an eighth valve 6h, a ninth valve 6i, an oil circulation pump 17b, and a tenth valve 6j. , And a pipe 19b in which the second-stage cracked oil cooler 18b is looped in a counterclockwise direction. The second stage pyrolysis gas ejector 14b has the same configuration as the first stage pyrolysis gas ejector 14a. However, what is sent as indicated by an arrow X in FIG. 1B is a pyrolysis gas that could not be condensed instead of the pyrolysis gas. Note that the description corresponding to the bypass pipe 20 is omitted.

An off-gas combustion furnace 22 is disposed downstream of the second stage pyrolysis recovery loop 13. A dilution air inflow damper 23 is provided on the outlet side of the combustion furnace 22. The combustion furnace 22 is provided with a main burner 24 and an auxiliary burner 25 used when starting the combustion furnace 22 adjacent to the combustion furnace 22. The main burner 22 is supplied with off-gas from the second-stage cracked oil tank 15b (gas that has not been condensed as cracked oil such as H ₂ and CO) from a pipe 19c interposed with an eleventh valve 6k. It is like that.

  In the first stage pyrolysis recovery loop 12 and the second stage pyrolysis recovery loop 13, the recovered cracked oil, piping through which off-gas flows, such as pipes 19a, 19b, 19h, bypass pipe 20, and all devices through which oil passes, for example, The ejectors 14a and 14b, the tanks 15a and 15b, the oil circulation pumps 17a and 17b, and the like are provided with a heating source for smoothly flowing the oil, for example, a heating member such as a heater and a steam trace, and a heat retaining member (not shown). It has been.

  Reference numeral 26 in FIG. 1 indicates a combustion and dilution air blower. The blower 26 and the combustion furnace 22 are connected by a pipe 19d having a dilution valve 27a interposed therebetween, and dilution air is sent from the blower 26 to the combustion furnace 22. The blower 26 is connected to the main burner 24 by a pipe 19e, and is connected to the auxiliary burner 25 by a pipe 19f with a valve 27b interposed. A reference numeral 28 in FIG. 1 denotes a fuel tank containing LPG or the like, and is connected to a line 32 having an auxiliary burner 25 by a pipe 19g having a pressure reducing valve 29 and a flow rate adjusting valve 30 interposed therebetween. An external gas fan 31 is connected to the combustion furnace 22. Note that reference numerals 33a and 33b in FIG. 1 denote in-tank cracked oil discharge valves interposed in the discharge pipes 34a and 34b, respectively.

  As described above, the pyrolysis oil recovery system according to the first embodiment mainly includes the first stage pyrolysis gas ejector 14a, the first stage cracking oil tank 15a, and the first stage cracking oil cooler 18a. A first-stage pyrolysis oil recovery loop 12, and a first-stage pyrolysis oil recovery loop 13 mainly including a second-stage pyrolysis gas ejector 14b, a second-stage cracking oil tank 15b, and a second-stage cracking oil cooler 18b. By combining two loops, the pyrolysis oil is recovered from the generated pyrolysis gas in two stages. By adopting such a configuration, the following effects are obtained.

  That is, for example, in a pyrolysis oil recovery system in which a mixed organic material in which plastics and paper, wood, etc. are mixed is pyrolyzed and oil is recovered from the pyrolysis gas, first, heat of paper, wood, etc. is recovered in the first loop. Pyrolysis oil A derived from decomposition can be recovered from the discharge pipe 33a, and pyrolysis oil B derived from the thermal decomposition of plastics and the like can be recovered from the discharge pipe 33b in the second loop. A and pyrolysis oil B can be separated and recovered. Thereby, the simple pyrolysis oil collection | recovery system which can be collect | recovered separately for every characteristic of pyrolysis oil can be provided.

  As a result, sludge removal filters and centrifuges can be used compared to the case of distilling and fractionating light cracked oil and heavy cracked oil from cracked oil recovered by thermal cracking as in the past. A system suitable for continuous pyrolysis operation, which eliminates the need for equipment that separates and removes sludge by means of sludge removal, etc., further distills, distills and fractionates by labor, simplifies the equipment. It becomes possible.

Second Embodiment: (Corresponding to Claim 2)
Please refer to FIG. FIG. 2 shows an overall view of the flow of the pyrolysis oil recovery system according to the second embodiment, wherein the pyrolysis oil is recovered in three stages from the generated pyrolysis gas in a combination of three loops. . However, the same members as those in FIG.

  Reference numeral 35 in the figure indicates a third-stage pyrolysis oil recovery loop. The loop 35 includes a first stage pyrolysis gas ejector 14c, a first stage cracking oil tank 15c, a twelfth valve 61, a thirteenth valve 6m, an oil circulation pump 17c, a fourteenth valve 6n, and a first stage cracking. A pipe 19i in which the oil cooler 18c is looped counterclockwise is provided. In addition, the code | symbol Z 'in a figure shows the direction where the pyrolysis gas which was not able to condense in the 2nd cracked oil cooler 18b of the 2nd stage | stage pyrolyzed oil recovery loop 13 is sent. In FIG. 2, reference numeral 33c denotes a valve interposed in the discharge pipe 34c, reference numeral 19j denotes a pipe connecting the second stage cracked oil tank 15b and the third stage pyrolysis gas ejector 14c, and reference numeral 19k denotes The piping which interposed the 11th valve | bulb 6k which connects the 1st stage | paragraph cracked oil tank 15c and the main valve 24 is shown.

  As described above, the pyrolysis oil recovery system according to the second embodiment mainly includes the first stage pyrolysis gas ejector 14a, the first stage cracking oil tank 15a, and the first stage cracking oil cooler 18a. A first stage pyrolysis oil recovery loop 12, and a first stage pyrolysis oil recovery loop 13 mainly including a second stage pyrolysis gas ejector 14b, a second stage cracking oil tank 15b, and a second stage cracking oil cooler 18b; The heat generated by the combination of the three-stage pyrolysis oil recovery loop 35 including the third-stage pyrolysis gas ejector 14c, the second-stage cracking oil tank 15c, and the second-stage cracking oil cooler 18c. Pyrolysis oil is recovered from cracked gas in three stages. Therefore, it has the following effects.

  That is, in a pyrolysis processing system for recovering oil from pyrolysis gas by treating a mixed organic matter treatment material in which plastics and paper, wood, etc. are mixed, pyrolysis oil A derived from pyrolysis of paper etc. It can be separated, condensed and recovered into pyrolysis oil B derived from pyrolysis of wood, etc. and pyrolysis oil C derived from pyrolysis of plastics, etc., and pyrolysis oil A and pyrolysis oil B having different characteristics And pyrolysis oil C can be separated and recovered. Specifically, the pyrolysis oil A can be recovered from the discharge pipe 34a, the pyrolysis oil B can be recovered from the discharge pipe 34b, and the pyrolysis oil C can be recovered from the discharge pipe 34c. Thereby, the simple pyrolysis oil collection | recovery system which can be collect | recovered separately for every characteristic of pyrolysis oil can be provided.

  Compared to the conventional case of distilling and fractionating finely from cracked oil recovered by pyrolysis treatment to light cracked oil, medium cracked oil, heavy cracked oil as in the past. In addition, the equipment for separating and removing the sludge by means of sludge removal such as a sludge removal filter, centrifuge, etc., further distilling, distilling and fractionating by labor is not required, and the equipment can be simplified. Thus, a system suitable for the thermal decomposition continuous operation process can be obtained.

(Third Embodiment): (Corresponding to Claim 3)
Please refer to FIG. FIG. 3 shows an overall flow diagram of the pyrolysis oil recovery system according to the third embodiment. The pyrolysis oil is recovered in three stages from the generated pyrolysis gas in a combination of three loops. It is characterized in that the set temperature of the pyrolysis oil can be changed according to the organic matter treatment material. However, the same members as those in FIG. 1 and FIG.

Reference numerals 41a, 41b, and 41c in the figure measure the temperatures of cracked oils disposed in the first stage cracked oil cooler 18a, the second stage cracked oil cooler 18b, and the third stage cracked oil cooler 18c, respectively. A thermometer is shown. The set temperature of the first stage pyrolysis oil to be directly sprayed and contacted by the first stage pyrolysis gas ejector 14a is set to T ₁ (for example, 100 ° C.) by the thermometer 41a. The set temperature of the second stage pyrolysis oil to be directly sprayed and contacted by the second stage pyrolysis gas ejector 14b is set to T ₂ (for example, 80 ° C.) by the thermometer 41b. The set temperature of the first stage pyrolysis oil to be directly sprayed and contacted by the third stage pyrolysis gas ejector 14c is set to T ₃ (for example, 50 ° C.) by the thermometer 41c. Thus, in the third embodiment, the set temperature of the cracked oil can be changed to T ₁ , T ₂ , and T ₃ according to the mixed organic matter processing material.

According to the pyrolysis oil recovery system according to the third embodiment, in the pyrolysis processing system for thermally decomposing a mixed organic matter treatment material in which plastics, paper, wood, and the like are mixed, and recovering the oil from the pyrolysis gas It can be separated, condensed and recovered into pyrolysis oil A derived from pyrolysis of paper, pyrolysis oil B derived from pyrolysis of wood, etc., and pyrolysis oil C derived from pyrolysis of plastics, etc. It is possible to control each of the components (fractions) to an optimum temperature when separating and recovering them, such as pyrolysis oil A, pyrolysis oil B, and pyrolysis oil C with different characteristics. A simple pyrolysis oil recovery system capable of recovering pyrolysis oil for each component (fraction) desired to be taken at each stage can be provided (fourth embodiment): (corresponding to claim 4)
Please refer to FIG. FIG. 4 shows an overall flow diagram of the pyrolysis oil recovery system according to the fourth embodiment. The pyrolysis oil is recovered in three stages from the generated pyrolysis gas in a combination of three loops. The circulation flow rate of the pyrolysis oil can be changed according to the organic matter treatment material. However, the same members as those in FIG. 1 and FIG.

Reference numerals 42a, 42b, and 42c in the figure indicate a pipe 19a of the first stage pyrolysis oil recovery loop 12, a pipe 19b of the second stage pyrolysis oil recovery loop 13, and a pipe of the third stage pyrolysis oil recovery loop 35, respectively. The flowmeters of the first-stage pyrolysis oil, the second-stage pyrolysis oil, and the third-stage pyrolysis oil respectively arranged at 19i are shown. The flowmeter 42a, sets the flow rate of the first stage pyrolysis oil to direct spray contact with the first stage pyrolysis gas ejector 14a to F _1. The flow rate of the second stage pyrolysis oil that is directly sprayed in contact with the second stage pyrolysis gas ejector 14b is set to F ₂ by the flow meter 42b. The flowmeter 42c, sets the circulation flow rate of the first stage pyrolysis oil to direct spray contact with the third stage pyrolysis gas ejector 14c to F _3. As described above, the circulation flow rate of the pyrolysis oil can be changed to F ₁ , F ₂ , and F ₃ in accordance with the organic matter processing material.

  According to the pyrolysis oil recovery system according to the fourth embodiment, in the pyrolysis processing system for thermally decomposing a mixed organic material treatment material in which plastics, paper, wood, and the like are mixed, and recovering the oil from the pyrolysis gas When separating and condensing the pyrolysis oil A derived from the thermal decomposition of paper, wood, etc. and the pyrolysis oil B derived from the thermal decomposition of plastics, etc., the set circulation flow rate of the first stage pyrolysis oil, The set circulation flow rate of each stage of pyrolysis oil, such as the set circulation flow rate of the second stage pyrolysis oil, can be set to the optimum flow rate, and it is simple to recover the pyrolysis oil for each component that you want to take at each stage A pyrolysis oil recovery system is obtained.

(Fifth Embodiment): (Corresponding to Claim 5)
Please refer to FIG. FIG. 5 shows an overall view of the flow of the pyrolysis oil recovery system according to the fifth embodiment. The pyrolysis oil is recovered in three stages from the generated pyrolysis gas in a combination of three loops. An off-gas component that cannot be condensed in the pyrolysis oil recovery loop having a specific number of stages is used as an auxiliary fuel for the heating burner of the pyrolysis furnace. However, the same members as those in FIG. 1 and FIG. An arrow 43 in the figure indicates a waste heat utilization destination.

  According to the pyrolysis oil recovery system according to the fifth embodiment, the off-gas component that cannot be condensed in the pyrolysis oil recovery stage is used as an auxiliary fuel for the heating burner of the pyrolysis furnace 8. In addition, it is possible to obtain a pyrolysis oil recovery system with improved energy recovery efficiency.

(Sixth embodiment): (corresponding to claim 6)
Please refer to FIG. FIG. 6 shows an overall flow diagram of the pyrolysis oil recovery system according to the sixth embodiment. The pyrolysis oil recovered in the first and third stage pyrolysis oil recovery loops is the same as that of the pyrolysis furnace. It is used as a main fuel for a heating burner and is characterized in that the pyrolysis oil recovered in the second stage pyrolysis oil recovery loop is used for the production of high value-added carbon. However, the same members as those in FIG. 1 and FIG.

  An arrow 44 in the figure indicates a pyrolysis oil for producing high-value-added carbon. Here, examples of the high-value-added carbon include carbon nanotubes (CNT), nanocarbons, and carbon black, and there are oils having optimum components (fractions) for producing the respective carbons.

  According to the pyrolysis oil recovery system according to the sixth embodiment, the pyrolysis oil recovered in the first and third stage pyrolysis oil recovery loops is utilized as the main fuel for the heating burner of the pyrolysis furnace, The pyrolysis oil recovered in the second stage pyrolysis oil recovery loop can be used for the production of high value-added carbon. Thus, the pyrolysis oil of a specific component (fraction) of a specific number of stages can be extracted from the pyrolysis oil recovered in the pyrolysis oil recovery stage, and the pyrolysis oil of this component (fraction) is used. As a result, it can be used for the production of more optimal high value-added carbon.

  In the sixth embodiment, the pyrolysis oil recovered in the first and third stage pyrolysis oil recovery loops is used as the main fuel for the heating burner of the pyrolysis furnace, and in the second stage pyrolysis oil recovery loop. Although the case where the recovered pyrolysis oil is used for the production of high value-added carbon has been described, the present invention is not limited to this. For example, the pyrolysis oil collected in the pyrolysis oil recovery loop of each other stage or a specific number of stages is utilized as the main fuel of the heating burner of the pyrolysis apparatus, and each stage different from this or a specific number of stages The pyrolysis oil recovered in the pyrolysis oil recovery loop may be used for the production of high added value carbon.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment. Specifically, in the above embodiment, the use of the pyrolysis oil collected in the pyrolysis recovery loop of two or three stages has been described, but not limited to this, in the pyrolysis recovery loop of four or more stages. The recovered pyrolysis oil may be used.

The flowchart of the pyrolysis oil collection | recovery system in the 1st Embodiment of this invention. The flowchart of the pyrolysis oil collection | recovery system in the 2nd Embodiment of this invention. The flowchart of the pyrolysis oil collection | recovery system in the 3rd Embodiment of this invention. The flowchart of the pyrolysis oil collection | recovery system in the 4th Embodiment of this invention. The flowchart of the pyrolysis oil collection | recovery system in the 5th Embodiment of this invention. The flowchart of the pyrolysis oil collection | recovery system in the 6th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Material input apparatus, 3 ... Raw material input hopper, 4a, 4b, 19a-19g, 34a-34c ... Piping, 6a-6n, 27a, 27b, 30, 33a-33c ... Valve, 8 ... Pyrolysis furnace (thermal decomposition Apparatus), 9 ... heater, 12 ... first stage pyrolysis oil recovery loop, 13 ... second stage pyrolysis oil recovery loop, 14a, 14b, 14c ... pyrolysis gas ejector, 15a, 15b, 15c ... cracking oil tank, 17a, 17b, 17c ... oil circulation pump, 18a, 18b, 18c ... cracked oil cooler, 24 ... main burner, 25 ... auxiliary burner, 29 ... pressure reducing valve, 30 ... flow control valve, 35 ... third stage pyrolysis oil Collection loop.

Claims (6)

In the pyrolysis oil recovery system for recovering oil from the pyrolysis gas produced by the pyrolysis device that pyrolyzes the mixed organic matter treatment material put into the pyrolysis device into pyrolysis gas and residue,
A first-stage pyrolysis gas ejector that directly spray-contacts and condenses first-stage pyrolysis gas generated in the pyrolysis device and led out to the outside with first-stage recovery cracked oil, and first-stage pyrolysis oil condensed in the first-stage pyrolysis gas ejector A first-stage cracked oil recovery loop having a first-stage cracked oil tank to be stored and a first-stage cracked oil cooler that cools the condensed first-stage cracked oil;
A first-stage pyrolysis gas ejector that condenses the first-stage pyrolysis gas that could not be condensed by the first-stage pyrolysis oil ejector in the first-stage pyrolysis oil ejector loop by direct spray contact with the latter-stage cracking oil, and condenses in this latter-stage pyrolysis gas ejector. Generated by a combination of a two-stage pyrolysis oil recovery loop having a latter-stage cracking oil tank that stores the latter-stage pyrolysis oil and a latter-stage cracking oil recovery loop that cools the condensed latter-stage pyrolysis oil. A pyrolysis oil recovery system for recovering pyrolysis oil from pyrolysis gas in two stages. In the pyrolysis recovery system for recovering oil from the pyrolysis gas produced by the pyrolysis device that pyrolyzes the mixed organic matter treatment material put into the pyrolysis device into pyrolysis gas and residue,
A first-stage pyrolysis gas ejector for directly spraying and condensing first-stage pyrolysis gas generated in the pyrolysis apparatus and led out to the outside with first-stage recovered cracked oil; and a first-stage pyrolysis gas ejector A first stage pyrolysis oil recovery loop having a first stage cracked oil tank for storing condensed first stage pyrolysis oil, and a first stage cracked oil cooler for cooling the condensed first stage pyrolysis oil;
A second-stage pyrolysis oil recovery loop having the same equipment configuration as the first-stage pyrolysis oil recovery loop;
One or more n-th stage pyrolysis oil recovery loops having the same equipment configuration as the first stage pyrolysis oil recovery loop provided at one or more downstream sides of the second stage pyrolysis oil recovery loop (where n is 3 A pyrolysis oil recovery system for recovering pyrolysis oil in multiple stages from the generated pyrolysis gas in combination of three or more pyrolysis oil recovery loops. The first stage pyrolysis oil set in the first stage pyrolysis oil ejecting loop in the first stage pyrolysis oil ejector loop, and the second stage pyrolysis in the second stage pyrolysis oil recovery loop. The set temperature of the second stage pyrolysis oil that is directly sprayed in contact with the gas ejector, and the nth stage pyrolysis oil that is directly sprayed in contact with the nth stage pyrolysis gas ejector in the nth stage pyrolysis oil recovery loop. The pyrolysis oil recovery system according to claim 2, wherein the set temperature of the multistage pyrolysis oil and the preset temperature of the multistage pyrolysis oil can be changed according to the organic matter treatment material. The set circulation flow rate of the first stage pyrolysis oil to be directly sprayed in contact with the first stage pyrolysis gas ejector in the first stage pyrolysis oil recovery loop, the second stage heat in the second stage pyrolysis oil recovery loop The set circulation flow rate of the second-stage pyrolysis oil that is directly sprayed in contact with the cracked gas ejector, and the n-th stage heat that is directly sprayed in contact with the nth-stage pyrolysis gas ejector in the nth-stage pyrolysis oil recovery loop. 4. The pyrolysis oil recovery system according to claim 2, wherein the set circulation flow rate of the cracked oil and the set circulation flow rate of the multi-stage pyrolysis oil can be changed according to the organic matter treatment material. 5. The off-gas component that cannot be condensed in each stage or a specific number of pyrolysis oil recovery loops is utilized as a fuel for combustion in a heating burner of a pyrolysis apparatus. The pyrolysis oil recovery system described in 1. The pyrolysis oil recovered in the pyrolysis oil recovery loop of each stage or a specific number of stages is used as the main fuel for the heating burner of the pyrolysis apparatus, and each stage or a specific number of pyrolysis oils different from this is used. The pyrolysis oil recovery system according to any one of claims 1 to 5, wherein the pyrolysis oil recovered in the recovery loop is used for the production of high value-added carbon.

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