WO2023013163A1 - Appareil de traitement et procédé de traitement pour récupérer une huile de décomposition à partir d'un gaz de pyrolyse - Google Patents

Appareil de traitement et procédé de traitement pour récupérer une huile de décomposition à partir d'un gaz de pyrolyse Download PDF

Info

Publication number
WO2023013163A1
WO2023013163A1 PCT/JP2022/014984 JP2022014984W WO2023013163A1 WO 2023013163 A1 WO2023013163 A1 WO 2023013163A1 JP 2022014984 W JP2022014984 W JP 2022014984W WO 2023013163 A1 WO2023013163 A1 WO 2023013163A1
Authority
WO
WIPO (PCT)
Prior art keywords
oil
cracked oil
water
pyrolysis
pyrolysis gas
Prior art date
Application number
PCT/JP2022/014984
Other languages
English (en)
Japanese (ja)
Inventor
貴行 井原
孝 藤原
健 向井
Original Assignee
荏原環境プラント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 荏原環境プラント株式会社 filed Critical 荏原環境プラント株式会社
Publication of WO2023013163A1 publication Critical patent/WO2023013163A1/fr

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • C10G1/10—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the present invention relates to a processing apparatus and a processing method for recovering cracked oil from pyrolysis gas generated by pyrolysis of organic matter such as waste plastics, biomass and waste, and particularly recovering high-quality cracked oil from pyrolysis gas. It relates to a processing apparatus and a processing method for processing.
  • Waste plastics may contain PS (polystyrene), PP (polypropylene), PE (polyethylene), PVC (polyvinyl chloride), PET (polyethylene terephthalate), etc.
  • PS polystyrene
  • PP polypropylene
  • PE polyethylene
  • PVC polyvinyl chloride
  • PET polyethylene terephthalate
  • a fluidized bed furnace has a structure in which the interior of the furnace is divided into a thermal decomposition chamber and a medium regeneration chamber by a partition wall. While the fluid medium circulates between the pyrolysis chamber and the medium regeneration chamber, the waste plastic is introduced into the pyrolysis chamber. The waste plastic is heated by the fluid medium in the pyrolysis chamber and gasified after pyrolysis. Waste plastic residues are carried to the media reclamation chamber by the fluid media. Waste plastic residues are combusted in the media reclamation chamber to heat the flowing media. The heated fluid medium moves into the pyrolysis chamber and acts as a heat source within the pyrolysis chamber.
  • a fluidized bed furnace in which the fluidized medium circulates in this way is called an internal circulation fluidized bed gasification system.
  • Waste plastic generates pyrolysis gas through thermal decomposition. Cracked oil is recovered by condensing the gaseous hydrocarbons contained in the pyrolysis gas.
  • the internal circulation fluidized bed gasification system described above is expected as a technology capable of thermally decomposing waste plastics and recovering cracked oil and cracked gas as thermal decomposition products.
  • the cracked oil recovered from the thermal decomposition of waste plastics may contain impurities that are undesirable for use in petroleum refining and petrochemistry.
  • chlorine, acid, solid matter, and the like which are by-produced during thermal decomposition, may be mixed into the cracked oil. More specifically, chlorine is HCl derived from PVC in waste plastics, acid is sublimable acid derived from PET and PVC plasticizers in waste plastics, and solids are high These include molecular polymers and coke residues.
  • the fluidized medium for example, silica sand fines
  • catalyst fines which are solids derived from the fluidized bed furnace, and catalyst fines are added to the cracked oil. It may be mixed. These impurities deteriorate the quality of the cracked oil and become a factor that inhibits reuse of the cracked oil.
  • the present invention provides a processing apparatus and a processing method capable of improving the quality of cracked oil recovered from pyrolysis gas generated by thermal decomposition of organic matter such as waste plastics.
  • a processing apparatus for recovering cracked oil from pyrolysis gas generated by pyrolyzing organic matter in a pyrolysis furnace, wherein the physical separation physically removes particles from the pyrolysis gas. and an oil recovery section for recovering cracked oil from the pyrolysis gas from which the particles have been removed, wherein the physical separation section removes particles from the pyrolysis gas by spraying a cleaning medium onto the pyrolysis gas.
  • a processing apparatus is provided that includes a scrubber that removes the
  • the processing apparatus further includes an oil pump that transfers the cracked oil recovered by the oil recovery unit to the cleaning dust collector, and the cleaning dust collector is transported by the oil pump. It is configured to spray the cracked oil as the cleaning medium onto the pyrolysis gas.
  • the cleaning dust collector is a venturi scrubber or a cyclone scrubber.
  • the physical separation unit includes an oil passage structure for sending cracked oil recovered by the scrubbing dust collector to the pyrolysis furnace.
  • the physical separation unit further comprises a solid-gas separator for separating particles from the pyrolysis gas generated within the pyrolysis furnace. In one aspect, the solid-gas separator is located within the pyrolysis furnace.
  • the pyrolysis furnace is a pyrolysis furnace of a fluidized bed furnace
  • the fluidized bed furnace has the pyrolysis furnace and the medium regeneration furnace in which a fluidized medium circulates
  • the physical separation unit comprises: A particle passage structure is provided for sending the particles removed from the pyrolysis gas from the solid-gas separator to the media regeneration furnace.
  • the processing equipment further includes a chemical separation unit that chemically removes impurities from the cracked oil recovered by the oil recovery unit, and the chemical separation unit supplies water to the cracked oil.
  • an oil-water mixer for mixing the cracked oil and the water to transfer impurities in the cracked oil to the water; and a water mixer connected to the oil-water mixer to separate the cracked oil and the water. It has an oil-water separator that allows
  • a processing apparatus for recovering cracked oil from pyrolysis gas generated by pyrolyzing organic matter in a pyrolysis furnace, comprising: an oil recovery unit for recovering cracked oil from the pyrolysis gas; A chemical separation unit for chemically removing impurities from the cracked oil, wherein the chemical separation unit includes a water supply line that supplies water to the cracked oil, and mixes the cracked oil and the water,
  • a treatment apparatus is provided comprising: an oil-water mixer for transferring impurities in the cracked oil to the water; and an oil-water separator coupled to the oil-water mixer for separating the cracked oil and the water.
  • a processing method for recovering cracked oil from pyrolysis gas generated by pyrolyzing organic matter in a pyrolysis furnace comprising physical separation for physically removing particles from the pyrolysis gas and recovering the cracked oil from the pyrolysis gas from which the particles have been removed by an oil recovery unit, the physical separation is performed by guiding the pyrolysis gas to a scrubbing dust collector, in the scrubbing dust collector
  • a treatment method includes removing particles from the pyrolysis gas by spraying the pyrolysis gas with a cleaning medium.
  • the cracked oil recovered by the oil recovery unit is transferred to the cleaning and dust collector, and the cleaning and dust collector uses the cracked oil transferred from the oil recovery unit as the cleaning medium for the heat treatment. Spray into cracked gas.
  • the cleaning dust collector is a venturi scrubber or a cyclone scrubber.
  • the physical separation further includes the step of sending the cracked oil collected by the scrubber and dust collector to the pyrolysis furnace.
  • the physical separation further comprises separating particles from the pyrolysis gas generated in the pyrolysis furnace by a solid-gas separator.
  • the solid-gas separator is located within the pyrolysis furnace.
  • the pyrolysis furnace is a pyrolysis furnace of a fluidized bed furnace
  • the fluidized bed furnace has the pyrolysis furnace and the medium regeneration furnace in which a fluidized medium circulates
  • the physical separation is the The method further includes sending the particles removed from the pyrolysis gas by a solid-gas separator to the media regeneration furnace.
  • the treatment method further comprises chemical separation for chemically removing impurities from the cracked oil recovered by the oil recovery unit, wherein the chemical separation supplies water to the cracked oil, A step of mixing the cracked oil and the water to transfer impurities in the cracked oil to the water, and then separating the cracked oil and the water.
  • a processing method for recovering cracked oil from pyrolysis gas generated by pyrolyzing organic matter in a pyrolysis furnace wherein cracked oil is recovered from the pyrolysis gas, and cracked oil is recovered from the cracked oil.
  • a chemical separation is performed to chemically remove impurities, the chemical separation supplying water to the cracked oil, mixing the cracked oil and the water, and removing the impurities in the cracked oil from the water. and then separating said cracked oil and said water.
  • the physical separation unit can remove particles from the pyrolysis gas.
  • a physical separation unit comprising a solid-gas separator and a scrubber can remove particles from the pyrolysis gas in two stages. That is, the solid-gas separator can remove relatively large particles from the pyrolysis gas, and then the scrubber can remove fine particles from the pyrolysis gas. As a result, the amount of particles contained in the cracked oil recovered from the pyrolysis gas can be significantly reduced.
  • the chemical separation unit which has a water supply line, an oil-water mixer, and an oil-water separator, can remove impurities from the cracked oil by transferring impurities such as water-soluble substances and chlorine from the cracked oil to the water. As a result, the amount of impurities contained in the cracked oil recovered from the pyrolysis gas can be significantly reduced.
  • processing equipment with both physical and chemical separations can adequately remove impurities such as powders, water-soluble substances, and chlorine from the cracked oil.
  • impurities such as powders, water-soluble substances, and chlorine
  • FIG. 1 is a schematic diagram illustrating one embodiment of a pyrolytic treatment system for treating organic matter
  • FIG. 1 is a schematic diagram of another embodiment of a pyrolytic treatment system for treating organic matter
  • FIG. 1 is a schematic diagram of yet another embodiment of a pyrolytic treatment system for treating organic matter
  • FIG. FIG. 4 is a schematic diagram showing another embodiment of a pyrolysis type treatment system using a fluidized bed furnace
  • FIG. 3 is a schematic diagram showing still another embodiment of a pyrolysis type treatment system using a fluidized bed furnace;
  • FIG. 1 is a schematic diagram illustrating one embodiment of a pyrolytic treatment system for treating organic matter.
  • Organic substances to be treated in the embodiments described below include waste containing at least one of PVC (polyvinyl chloride), PET (polyethylene terephthalate), PS (polystyrene), PP (polypropylene), and PE (polyethylene). It's plastic.
  • the pyrolysis treatment system includes a pyrolysis furnace 6 that pyrolyzes waste plastic, which is an example of organic matter, and a treatment device that recovers cracked oil from the pyrolysis gas discharged from the pyrolysis furnace 6.
  • the type of the pyrolysis furnace 6 is not particularly limited, and may be, for example, a fluidized-bed pyrolysis furnace, which will be described later, or a kiln-type pyrolysis furnace.
  • the processing apparatus 2 includes a physical separation unit 15 that physically removes particles from the pyrolysis gas generated by pyrolyzing the waste plastic in the pyrolysis furnace 6, and a cracked oil from the pyrolysis gas from which the particles have been removed. is provided with an oil recovery unit 16 for recovering the Specific examples of the particles removed by the physical separation unit 15 include high molecular weight polymer and coke residue produced during thermal decomposition of waste plastics, fluid media (for example, silica sand fine powder), catalyst fine powder, and the like.
  • the physical separation unit 15 is equipped with a cleaning dust collector 25 that removes particles from the pyrolysis gas generated in the pyrolysis furnace 6.
  • the cleaning dust collector 25 is connected to the pyrolysis furnace 6 and arranged downstream of the pyrolysis furnace 6 .
  • the cleaning dust collector 25 of this embodiment is a venturi scrubber. More specifically, the cleaning dust collector 25 includes a venturi tube 27 connected to a gas outlet of the pyrolysis furnace 6, a cleaning medium discharge nozzle 28 having an oil outlet in the venturi tube 27, and a venturi tube 27.
  • a cyclone collector 29 is provided. Cracked oil that has already been recovered from the pyrolysis gas is supplied to the cleaning medium discharge nozzle 28 . That is, the cleaning medium ejection nozzle 28 is connected to the oil recovery section 16 so that the decomposed oil already recovered by the oil recovery section 16 is supplied to the cleaning medium ejection nozzle 28 as the cleaning medium.
  • the oil recovery unit 16 includes an oil scrubber 35 that recovers the cracked oil from the pyrolysis gas, and a cracked oil storage tank 38 that stores the cracked oil discharged from the oil scrubber 35 .
  • the cracked oil in the cracked oil storage tank 38 is transferred to the cleaning dust collector 25 by the oil pump 40 .
  • An oil pump 40 is installed in the cracked oil storage tank 38 to transfer the cracked oil to the cleaning medium discharge nozzle 28 .
  • the cleaning dust collector 25 sprays cracked oil pressurized by the oil pump 40 onto the pyrolysis gas flowing through the venturi tube 27 from the cleaning medium discharge nozzle 28 .
  • the flow velocity of the pyrolysis gas increases, and the cracked oil sprayed from the cleaning medium discharge nozzle 28 becomes mist and spreads in the pyrolysis gas.
  • the cracking oil mist captures particles present in the pyrolysis gas and removes these particles from the pyrolysis gas.
  • Particles removed by the cleaning dust collector 25 are particles having a diameter of 1 ⁇ m or more, for example.
  • the cracked oil sprayed from the cleaning medium discharge nozzle 28 not only traps fine particles, but also cools the pyrolysis gas, vaporizing the sprayed cracked oil and condensing a portion of the pyrolysis gas. Condensed cracked oil and trapped particles are collected in a cyclone collector 29 .
  • the particles in the pyrolysis gas are removed by the cleaning dust collector 25, and as a result, the quality of the cracked oil recovered by the oil scrubber 35 in the subsequent stage can be improved. .
  • the cleaning dust collector 25 of this embodiment is a venturi scrubber, but the type of the cleaning dust collector 25 is not particularly limited as long as the cleaning dust collector 25 can remove fine particles with a diameter of 1 ⁇ m or more from the pyrolysis gas.
  • the cleaning dust collector 25 may be a cyclone scrubber.
  • the pyrolysis gas is cooled, for example, from 450°C to 350°C by the cleaning dust collector 25.
  • oil components with a boiling point lower than 350° C. remain in a gaseous state and flow to the oil scrubber 35 in the subsequent stage.
  • oil components with a boiling point within the range of 350° C. to 450° C. are cooled by the cleaning dust collector 25 and condensed. Therefore, the cracked oil recovered by the washing and dust collector 25 is oil equivalent to heavy oil (that is, heavy oil).
  • the above operation temperature is an example, and the cooling temperature may be changed by changing the spray amount of the cracked oil to adjust the fraction of the cracked oil to be recovered.
  • the cleaning medium of the cleaning dust collector 25 is not limited to decomposition oil, and for example, a cleaning medium purchased from the outside may be sprayed.
  • Specific examples of the cleaning medium include light oil introduced from the outside, oil with a high boiling point (for example, lubricating oil with a boiling point of 450° C. or higher), and water.
  • the physical separation unit 15 is equipped with an oil passage structure 43 for sending the cracked oil recovered by the washing and dust collector 25 to the pyrolysis furnace 6.
  • This oil passage structure 43 extends from a heavy oil tank 45 connected to the bottom of the cyclone collector 29 to the pyrolysis furnace 6 .
  • the specific structure and shape of the oil passage structure 43 are not particularly limited as long as it has an oil passage through which cracked oil can pass. Since the recovered cracked oil contains fine particles, the oil passage structure 43 may be provided with a separation device for removing these fine particles from the cracked oil.
  • the cracked oil (heavy oil) collected at the bottom of the washing and dust collector 25 is temporarily stored in the heavy oil tank 45, and further flows from the heavy oil tank 45 into the pyrolysis furnace 6 through the oil passage structure 43.
  • the physical separation unit 15 has a liquid level sensor 46 that detects the liquid level of the cracked oil accumulated in the heavy oil tank 45, and an open/close valve 47 that opens and closes based on the liquid level position output from the liquid level sensor 46. are doing.
  • the on-off valve 47 is attached to the oil passage structure 43 .
  • the on-off valve 47 is configured to open when the liquid level of the cracked oil in the heavy oil tank 45 is higher than a predetermined level.
  • the on-off valve 47 is an actuator-driven valve such as an electric valve or an electromagnetic valve.
  • the cracked oil is sent from the heavy oil tank 45 through the oil passage structure 43 into the pyrolysis furnace 6 .
  • the cracked oil (heavy oil) returned to the pyrolysis furnace 6 is pyrolyzed again in the pyrolysis furnace 6 . Most of the pyrolyzed cracked oil remains in a gaseous state and passes through the scrubber 25, and the rest is condensed again to form cracked oil (heavy oil).
  • the heavy oil is recovered by the washing and dust collector 25, so that the oil scrubber 35 removes oil components (light oil, kerosene) having a lower boiling point than the heavy oil. , gasoline, etc.) can be recovered.
  • oil components light oil, kerosene having a lower boiling point than the heavy oil. , gasoline, etc.
  • the oil scrubber 35 is arranged downstream of the cleaning dust collector 25 .
  • the oil scrubber 35 is connected to the cleaning dust collector 25 , and the pyrolysis gas from which particles have been removed by the cleaning dust collector 25 is guided to the oil scrubber 35 .
  • the oil scrubber 35 is connected downstream of the cyclone collector 29 of the cleaning dust collector 25 .
  • the oil scrubber 35 sprays cracked oil already recovered from the cracked gas onto the cracked gas, thereby cooling the cracked gas and condensing gaseous cracked oil (hydrocarbons) in the cracked gas. . Both the condensed cracked oil and the sprayed cracked oil are discharged from the oil scrubber 35 and stored in the cracked oil storage tank 38 .
  • a specific configuration of the oil scrubber 35 to be used is not particularly limited, and a known oil scrubber can be used.
  • the oil scrubber 35 can be a tower having a gas passage formed therein and a scrubbing tower having a spray nozzle for spraying oil onto the gas flowing through the passage.
  • the oil scrubber 35 further cools the pyrolysis gas cooled by the cleaning dust collector 25 by spraying cracked oil onto the pyrolysis gas.
  • the pyrolysis gas is cooled from 450° C. to 350° C. by the scrubber 25 and cooled from 350° C. to 100° C. by the oil scrubber 35 . Therefore, in the oil scrubber 35, oil components with boiling points within the range of 350° C. to 100° C. are condensed and recovered.
  • the oil recovery unit 16 further includes a water scrubber 50 arranged downstream of the oil scrubber 35 and an oil-water separator 51 that separates cracked oil from the mixture of cracked oil and water discharged from the water scrubber 50 .
  • the water scrubber 50 sprays water onto the pyrolysis gas passing through it to further cool the pyrolysis gas.
  • the water scrubber 50 sprays alkaline water onto the pyrolysis gas.
  • the pyrolysis gas is cooled by contact with water (alkaline water in this embodiment). For example, pyrolysis gases are cooled from 100° C. to 40° C. by water scrubber 50 . Therefore, the water scrubber 50 condenses and recovers oil components and water vapor having boiling points within the range of 100°C to 40°C.
  • a mixture of cracked oil and water is discharged from the water scrubber 50 and sent to the oil-water separator 51 .
  • the oil-water separator 51 is configured to separate cracked oil from water.
  • the specific configuration of the oil-water separator 51 is not particularly limited, for example, a coalescer or a sedimentation tank can be used for the oil-water separator 51 .
  • the cracked oil separated by the oil-water separator 51 is sent to the cracked oil storage tank 38 and stored in the cracked oil storage tank 38 .
  • the oil scrubber 35 and the water scrubber 50 recover the cracked oil contained in the pyrolysis gas, thereby improving the overall cracked oil yield.
  • a specific configuration of the water scrubber 50 to be used is not particularly limited, and a known water scrubber can be used.
  • the water scrubber 50 can be a tower with gas passages formed therein and a scrubbing tower equipped with spray nozzles for spraying water onto the gas flowing through the passages.
  • the above-described oil scrubber 35 and water scrubber 50 are examples of condensers that condense gaseous cracked oil (hydrocarbons) in the pyrolysis gas.
  • the condenser may be a multi-stage condenser as in this embodiment, or may be a single-stage condenser.
  • the cooling form of the condenser may be direct cooling or indirect cooling.
  • the physical separation unit 15 includes a solid-gas separator 18 that separates particles from the pyrolysis gas generated in the pyrolysis furnace 6, and a pyrolysis gas from which the particles are separated from the pyrolysis gas by spraying cracked oil onto the pyrolysis gas.
  • a scrubbing dust collector 25 is provided to further remove particles.
  • the washing and dust collecting device 25 has the same construction as the washing and dust collecting device 25 of the embodiment described with reference to FIG.
  • the solid-gas separator 18 is preferably placed inside the pyrolysis furnace 6 in order to suppress temperature drop due to heat radiation, but may be placed outside the pyrolysis furnace 6 .
  • the solid-gas separator 18 is a cyclone-type solid-gas separator that separates particles from the pyrolysis gas by centrifugal force.
  • the pyrolysis gas generated by thermal decomposition of the waste plastic in the pyrolysis furnace 6 enters the solid-gas separator 18 through the upper inlet 18a and forms a swirling flow within the solid-gas separator 18. Particles contained in the pyrolysis gas are separated from the pyrolysis gas by centrifugal force. Particles removed by the solid-gas separator 18 are, for example, particles with a diameter of 10 ⁇ m or more. Particles separated from the pyrolysis gas are collected at the bottom of the solid-gas separator 18 .
  • the physical separation unit 15 has a particle passage structure 19 for sending particles removed from the pyrolysis gas from the solid-gas separator 18 to the outside of the pyrolysis furnace 6.
  • This particle passage structure 19 extends from the bottom of the solid-gas separator 18 to the outside of the pyrolysis furnace 6 .
  • the particles collected at the bottom of the solid-gas separator 18 are discharged from the solid-gas separator 18 through the particle passage structure 19 by their own weight.
  • the specific structure and shape of the particle passage structure 19 are not particularly limited as long as it has a particle passage through which particles can pass.
  • the particle passage structure 19 may extend from the bottom of the solid-gas separator 18 into the interior of the pyrolysis furnace 6 . That is, particles collected at the bottom of the solid-gas separator 18 may pass through the particle passage structure 19 back into the pyrolysis furnace 6 .
  • the cleaning dust collector 25 is arranged downstream of the solid-gas separator 18 .
  • the scrubbing dust collector 25 is connected to the solid-gas separator 18 , and the pyrolysis gas from which particles have been removed by the solid-gas separator 18 is guided to the scrubbing dust collector 25 .
  • the venturi tube 27 of the cleaning dust collector 25 is connected to the gas outlet of the solid-gas separator 18 .
  • the configuration and arrangement of the cleaning dust collector 25, which are not specifically described, are the same as those of the embodiment described with reference to FIG.
  • the cleaning dust collector 25 of the present embodiment is a venturi scrubber.
  • the type of dust device 25 is not particularly limited.
  • the cleaning dust collector 25 may be a cyclone scrubber.
  • the particles in the pyrolysis gas are removed in two stages by the solid-gas separator 18 and the cleaning dust collector 25. That is, the solid-gas separator 18 can remove relatively large particles from the pyrolysis gas, and then the cleaning dust collector 25 can remove fine particles from the pyrolysis gas. As a result, the quality of the cracked oil recovered by the oil scrubber 35 in the subsequent stage can be improved.
  • the physical separation unit 15 having both the solid-gas separator 18 and the scrubbing dust collector 25 is suitable when the particle concentration in the pyrolysis gas is high.
  • the waste plastic to be processed may contain both PVC (polyvinyl chloride) and PET (polyethylene terephthalate).
  • PVC polyvinyl chloride
  • PET polyethylene terephthalate
  • HCl hydrogen chloride
  • PET generates benzoic acid and terephthalic acid when it is thermally decomposed in the thermal decomposition furnace 6 . All of these acids sublimate and deposit downstream, causing fouling and corrosion of downstream equipment and deterioration of quality due to acid contamination (crystallization) in cracked oil.
  • the processing device 2 for recovering the cracked oil from the pyrolysis gas discharged from the pyrolysis furnace 6 includes an oil recovery section 16 for recovering the cracked oil from the pyrolysis gas, and an oil recovery section 16 for recovering the cracked oil.
  • a chemical separation section 60 is provided for chemically removing impurities from the cracked oil.
  • the physical separation unit 15 the solid-gas separator 18 and the cleaning dust collector 25
  • the oil recovery section 16 has the same configuration as the oil recovery section 16 in the embodiment shown in FIG. 1, redundant description thereof will be omitted.
  • the chemical separation unit 60 is connected to a water supply line 61 that supplies water to the cracked oil, an oil-water mixer 64 that mixes the cracked oil and water and transfers impurities in the cracked oil to the water, and the oil-water mixer 64 . and has an oil-water separator 66 for separating cracked oil and water.
  • Specific examples of the impurities removed by the chemical separation unit 60 include PVC-derived HCl and PET-derived sublimation acid crystals generated during thermal decomposition of waste plastics.
  • Specific examples of the water supplied from the water supply line 61 include steam condensed water, pure water, alkaline water, and the like. In this embodiment, alkaline water is used as the water supplied from the water supply line 61 .
  • the oil-water mixer 64 is connected to the cracked oil storage tank 38 of the oil recovery section 16 .
  • An oil pump 40 is installed in the cracked oil storage tank 38 to transfer the cracked oil from the cracked oil storage tank 38 to the oil-water mixer 64 .
  • the water supply line 61 is connected to the upstream side of the oil-water mixer 64 , and water is sent to the oil-water mixer 64 through the water supply line 61 .
  • the water is alkaline water discharged from the water scrubber 50 . That is, the water supply line 61 is connected to an oil-water separator 51 connected to the water scrubber 50 , and the alkaline water separated from the cracked oil by the oil-water separator 51 passes through the water supply line 61 to the oil-water mixer 64 .
  • the water supply line 61 may be connected to an alkaline water supply, not shown. In other embodiments, the water supply line 61 may be connected to a pure water supply or steam condensate supply, not shown.
  • the cracked oil recovered by the oil recovery unit 16 more specifically by the oil scrubber 35 and the water scrubber 50 is mixed with alkaline water by the oil-water mixer 64 .
  • Water-soluble powder for example, PET-derived sublimable acid crystals
  • HCl contained in the decomposed oil migrate to the alkaline water side and dissolve in the alkaline water.
  • a mixture of cracked oil and alkaline water output from the oil-water mixer 64 is sent to the oil-water separator 66, where the cracked oil and alkaline water (including impurities) are separated.
  • impurities such as water-soluble powder and HCl contained in the cracked oil are dissolved in the alkaline water, so these impurities are separated from the cracked oil together with the alkaline water. Therefore, the cracked oil extracted from the oil-water separator 66 is high-quality oil.
  • the oil-water separator 66 is not particularly limited as long as it has a structure capable of separating cracked oil and alkaline water.
  • the chemical separation unit 60 having the water supply line 61, the oil-water mixer 64, and the oil-water separator 66 removes impurities such as water-soluble substances and chlorine from the decomposed oil into water (alkaline water in this embodiment). Impurities can be removed from the cracked oil by moving to As a result, the amount of impurities contained in the cracked oil recovered from the pyrolysis gas can be significantly reduced.
  • slaked lime may be put into the waste plastic before being put into the pyrolysis furnace 6 .
  • the PVC is desalted and the PET is hydrolyzed by heating the waste plastic and the slaked lime while mixing the waste plastic and the slaked lime. That is, by heating PVC, chlorine contained in PVC is thermally separated as HCl (hydrogen chloride). The generated HCl is dry treated with slaked lime, and chlorine in HCl is fixed to the slaked lime as Ca salt (CaCl 2 ).
  • fine powder of slaked lime (Ca(OH) 2 ) and particles of Ca salts (CaCl 2 , CaCO 3 ), which are by-products, are recovered from the pyrolysis gas and decomposed. May be mixed with oil.
  • PVC-derived HCl that is not fixed in the slaked lime may also be mixed into the cracked oil.
  • some of the ester compounds contained in PVC plasticizers and PET are not hydrolyzed to produce sublimable benzoic acid and terephthalic acid, and these sublimable acids are converted from pyrolysis gas to cracked oil. may be mixed into the cracked oil as powder (crystals) when recovered.
  • the sublimable acid powder can be separated from the cracked oil by mixing it with water (eg, alkaline water). As a result, the quality of the cracked oil recovered from the pyrolysis gas can be improved.
  • FIG. 4 is a schematic diagram illustrating an embodiment of processing apparatus 2 that includes both the physical separation section 15 described with reference to FIG. 2 and the chemical separation section 60 described with reference to FIG. .
  • the chemical separation section 60 is arranged downstream of the physical separation section 15 .
  • the physical separation section 15 removes impurities such as particles from the pyrolysis gas and then the chemical separation section 60 removes impurities such as water-soluble powders, chlorine, etc. from the cracked oil recovered from the pyrolysis gas. .
  • a treatment device 2 with both a physical separation section 15 and a chemical separation section 60 can adequately remove particles, water-soluble substances, and impurities such as chlorine from the cracked oil. As a result, the amount of impurities contained in the cracked oil recovered from the pyrolysis gas can be significantly reduced.
  • the processing device 2 may comprise the physical separation section 15 described with reference to FIG. 1 and the chemical separation section 60 described with reference to FIG.
  • FIG. 5 is a schematic diagram showing one embodiment of a pyrolysis treatment system using a fluidized bed furnace.
  • the configuration and operation of the present embodiment, which are not specifically described, are the same as those of the embodiment described with reference to FIG. 2, so redundant description thereof will be omitted.
  • the thermal decomposition treatment system includes a fluidized bed furnace 1 that thermally decomposes and burns waste plastic, which is an example of organic matter, and cracked oil from the thermal decomposition gas discharged from the fluidized bed furnace 1.
  • a processing device 2 for collecting is provided.
  • the fluidized bed furnace 1 includes a pyrolysis furnace 6 that pyrolyzes waste plastics to generate pyrolysis gas containing pyrolysis products such as hydrocarbons, and a medium regeneration furnace 7 that burns the residue of the pyrolyzed waste plastics. It has The pyrolysis furnace 6 in the embodiment shown in FIG. 5 corresponds to the pyrolysis furnace 6 in the embodiment shown in FIGS. 1-4.
  • the pyrolysis furnace 6 and the medium regeneration furnace 7 are formed in one fluidized bed furnace 1. That is, the inside of the fluidized bed furnace 1 is partitioned into the pyrolysis furnace 6 and the medium regeneration furnace 7 by the partition wall 10 .
  • the overall shape of the fluidized bed furnace 1 is not particularly limited, it has, for example, a cylindrical shape or a rectangular shape.
  • Fluid media for example, silica sand
  • a fluidizing gas G is supplied to the pyrolysis furnace 6 and the medium regeneration furnace 7 in order to fluidize the fluidized medium. Waste plastics, which are raw materials, are fed into the pyrolysis furnace 6 by a raw material feeder (not shown).
  • the waste plastic is put into the pyrolysis furnace 6 while the fluid medium circulates between the pyrolysis furnace 6 and the medium regeneration furnace 7 .
  • the waste plastic is heated by the fluid medium in the pyrolysis furnace 6 and gasified after pyrolysis.
  • the waste plastic residue is carried to the medium regeneration furnace 7 by the fluid medium.
  • the waste plastic residue is burned in the medium regeneration furnace 7 to heat the fluid medium.
  • the heated fluid medium moves into the pyrolysis furnace 6 and functions as a heat source within the pyrolysis furnace 6 .
  • the fluidized bed furnace 1 in which the fluidized medium circulates in this way is called an internal circulation fluidized bed gasification system.
  • the treatment device 2 includes the physical separation section 15 and the oil recovery section 16 described with reference to FIG. That is, the physical separation unit 15 includes both the solid-gas separator 18 and the scrubbing dust collector 25 . This is because the pyrolysis gas discharged from the pyrolysis furnace 6 constituting the fluidized bed furnace 1 contains high concentrations of particles.
  • the physical separation unit 15 has a particle passage structure 19 for sending particles removed from the pyrolysis gas from the solid-gas separator 18 to the medium regeneration furnace 7 of the fluidized bed furnace 1 .
  • This particle passage structure 19 extends from the bottom of the solid-gas separator 18 to the media regeneration furnace 7 . Particles collected at the bottom of the solid-gas separator 18 are sent into the medium regeneration furnace 7 through the particle passage structure 19 by their own weight, and are burned in the medium regeneration furnace 7 .
  • the specific structure and shape of the particle passage structure 19 are not particularly limited as long as it has a particle passage through which particles can pass.
  • the particle passage structure 19 may extend from the bottom of the solid-gas separator 18 into the interior of the pyrolysis furnace 6 . That is, particles collected at the bottom of the solid-gas separator 18 may pass through the particle passage structure 19 back into the pyrolysis furnace 6 .
  • FIG. 6 is a schematic diagram showing another embodiment of a pyrolysis treatment system using a fluidized bed furnace.
  • the configuration and operation of this embodiment, which are not specifically described, are the same as those of the embodiment described with reference to FIG. 5, so redundant description thereof will be omitted.
  • the pyrolysis type treatment system of the embodiment shown in FIG. 6 includes the fluidized bed furnace 1 described with reference to FIG. ing.
  • the processing device 2 includes an oil recovery unit 16 that recovers cracked oil from the pyrolysis gas, and a chemical separation unit 60 that chemically removes impurities from the cracked oil recovered by the oil recovery unit 16.
  • the physical separation unit 15 the solid-gas separator 18 and the cleaning dust collector 25 shown in FIG. 5 is not provided. Since the oil recovery section 16 and the chemical separation section 60 have the same configurations as the oil recovery section 16 and the chemical separation section 60 in the embodiment shown in FIG. 3, redundant description thereof will be omitted.
  • FIG. 7 is a schematic diagram showing still another embodiment of a pyrolysis treatment system using a fluidized bed furnace.
  • the configuration and operation of this embodiment, which are not specifically described, are the same as those of the embodiment described with reference to FIGS. 5 and 6, so redundant description thereof will be omitted.
  • the pyrolysis type treatment system includes the fluidized bed furnace 1 described with reference to FIG. ing.
  • the processing device 2 includes both the physical separation section 15 described with reference to FIG. 2 and the chemical separation section 60 described with reference to FIG. That is, the processing apparatus 2 includes a physical separation unit 15 for physically removing particles from the pyrolysis gas generated by pyrolyzing the waste plastic in the pyrolysis furnace 6, and a An oil recovery unit 16 recovering the cracked oil and a chemical separation unit 60 chemically removing impurities from the cracked oil recovered by the oil recovery unit 16 are provided.
  • the chemical separation section 60 is arranged downstream of the physical separation section 15 .
  • the physical separation section 15 removes impurities such as particles from the pyrolysis gas and then the chemical separation section 60 removes impurities such as water-soluble powders, chlorine, etc. from the cracked oil recovered from the pyrolysis gas. .
  • a treatment device 2 with both a physical separation section 15 and a chemical separation section 60 can adequately remove particles, water-soluble substances, and impurities such as chlorine from the cracked oil. As a result, the amount of impurities contained in the cracked oil recovered from the pyrolysis gas can be significantly reduced.
  • the present invention can be used for a processing apparatus and a processing method for recovering cracked oil from pyrolysis gas generated by pyrolysis of organic matter such as waste plastics, biomass, and wastes. It can be used for processing equipment and processing methods for recovering cracked oil.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

La présente invention concerne un appareil de traitement et un procédé de traitement pour récupérer une huile de décomposition à partir d'un gaz de pyrolyse produit par décomposition thermique de matières organiques telles que des déchets de plastique, de la biomasse et d'autres déchets. La présente invention concerne en particulier un appareil de traitement et un procédé de traitement pour récupérer une huile de décomposition de haute qualité à partir d'un gaz de pyrolyse. L'appareil de traitement (2) est pourvu d'une partie de séparation physique (15) pour retirer physiquement des particules du gaz de pyrolyse, et d'une partie de récupération d'huile (16) pour récupérer une huile de décomposition à partir du gaz de pyrolyse duquel des particules ont été retirées. La partie de séparation physique (15) est pourvue d'un dispositif de rinçage et de collecte de poussière (25) pour retirer des particules du gaz de pyrolyse par pulvérisation d'un milieu de rinçage sur le gaz de pyrolyse.
PCT/JP2022/014984 2021-08-05 2022-03-28 Appareil de traitement et procédé de traitement pour récupérer une huile de décomposition à partir d'un gaz de pyrolyse WO2023013163A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-128721 2021-08-05
JP2021128721A JP2023023316A (ja) 2021-08-05 2021-08-05 熱分解ガスから分解油を回収するための処理装置および処理方法

Publications (1)

Publication Number Publication Date
WO2023013163A1 true WO2023013163A1 (fr) 2023-02-09

Family

ID=85155642

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/014984 WO2023013163A1 (fr) 2021-08-05 2022-03-28 Appareil de traitement et procédé de traitement pour récupérer une huile de décomposition à partir d'un gaz de pyrolyse

Country Status (2)

Country Link
JP (1) JP2023023316A (fr)
WO (1) WO2023013163A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732728A (en) * 1980-08-07 1982-02-22 Daizo Kunii Device and method for fluidized bed thermal decomposition and gasification circulating powder and granule by using inside cylinder with partition plate
JPH0995678A (ja) * 1995-09-28 1997-04-08 Nippon Steel Corp 廃プラスチック油化生成物からの塩化アルミニウム除去方法
JP2001031978A (ja) * 1999-07-23 2001-02-06 Mitsubishi Heavy Ind Ltd 廃プラスチックの油回収方法とその装置
JP2003253038A (ja) * 2002-03-05 2003-09-10 Mitsubishi Materials Corp 樹脂含有廃棄物の熱分解物から塩素を除去する方法と装置
JP2005194351A (ja) * 2004-01-05 2005-07-21 Nippon Steel Corp 有機系廃棄物の乾留ガスからの熱分解カーボン除去方法
EP3031881A1 (fr) * 2014-12-08 2016-06-15 Innord sp. z o.o. S.K.A. Procédé de traitement pyrolytique de déchets de polymère depuis le recyclage d'emballages alimentaires et système permettant de mettre en oeuvre ce procédé

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732728A (en) * 1980-08-07 1982-02-22 Daizo Kunii Device and method for fluidized bed thermal decomposition and gasification circulating powder and granule by using inside cylinder with partition plate
JPH0995678A (ja) * 1995-09-28 1997-04-08 Nippon Steel Corp 廃プラスチック油化生成物からの塩化アルミニウム除去方法
JP2001031978A (ja) * 1999-07-23 2001-02-06 Mitsubishi Heavy Ind Ltd 廃プラスチックの油回収方法とその装置
JP2003253038A (ja) * 2002-03-05 2003-09-10 Mitsubishi Materials Corp 樹脂含有廃棄物の熱分解物から塩素を除去する方法と装置
JP2005194351A (ja) * 2004-01-05 2005-07-21 Nippon Steel Corp 有機系廃棄物の乾留ガスからの熱分解カーボン除去方法
EP3031881A1 (fr) * 2014-12-08 2016-06-15 Innord sp. z o.o. S.K.A. Procédé de traitement pyrolytique de déchets de polymère depuis le recyclage d'emballages alimentaires et système permettant de mettre en oeuvre ce procédé

Also Published As

Publication number Publication date
JP2023023316A (ja) 2023-02-16

Similar Documents

Publication Publication Date Title
JP4594821B2 (ja) ガス化ガスの精製方法
US10655070B2 (en) Hybrid thermal process to separate and transform contaminated or uncontaminated hydrocarbon materials into useful products, uses of the process, manufacturing of the corresponding system and plant
CA2292559C (fr) Procede et appareil de recuperation d'eaux usees sanitaires par traitement eclair et de vapeurs
CN103013583B (zh) 一种热解煤气除尘冷却及焦油回收工艺
JPS6099398A (ja) 下水スラツジを熱分解するための方法
JP2004131736A (ja) 軽質オレフィンｆｃｃ流出物からの触媒回収
JP4126158B2 (ja) ポリメタクリル酸メチルの解重合方法
KR20220101617A (ko) 중합체를 생성물로 전환하는 방법 및 장치
CN113195685A (zh) 处理含碳材料的工艺和用于其的设备
EP3031881A1 (fr) Procédé de traitement pyrolytique de déchets de polymère depuis le recyclage d'emballages alimentaires et système permettant de mettre en oeuvre ce procédé
JP4768920B2 (ja) 廃プラスチックの熱分解法
WO2023013163A1 (fr) Appareil de traitement et procédé de traitement pour récupérer une huile de décomposition à partir d'un gaz de pyrolyse
CA3143875C (fr) Procede et systeme de thermolyse pour recuperer du noir de carbone et du carburant de pneus abandonnes
JP2005068435A (ja) 有機物に富む供給原料から除染合成ガスを高効率で製造する方法およびプラント
JP4043169B2 (ja) 油から汚染要因物を除去する熱的方法
CA2030253A1 (fr) Procede de traitement de gaz de combustion chauds contenant de l'acide chlorhdrique
RU2791389C1 (ru) Способ термолиза и система для получения восстановленной сажи и топлива из отработанных шин
JP2004277574A (ja) 合成ガスの冷却・除塵方法及びその装置
RU2182588C1 (ru) Способ термической переработки горючих сланцев
JPS5843435B2 (ja) ジユウシツユネツブンカイホウホウ
JP4899484B2 (ja) 有機物の処理方法および処理装置
JP3297295B2 (ja) 廃プラスチックからの油回収方法
CN204125431U (zh) 用于处理原始合成气的装置
JP2023553147A (ja) 廃プラスチックをリサイクルするシステムおよび方法
BR112021024898B1 (pt) Processo e sistema de termólise para a obtenção de negro de fumo recuperado e combustível a partir de pneus fora de uso

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22852592

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE