Pyrolysis-type processing system and pyrolysis-type processing method

Abstract

To provide a thermal decomposition-type treatment system which can recover high-quality oil from oxygen-containing matter to be treated such as biomass.SOLUTION: A thermal decomposition-type treatment system includes: a thermal decomposition furnace 1 which thermally decomposes matter to be treated to thereby produce thermally decomposed gas; a hydrogenation modification device 5 which subjects the thermally decomposed gas to hydrogenation treatment; and a condensation device 7 which condenses an oil component and water in the hydrogenated thermally decomposed gas to recover oil and light gas separately.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pyrolysis treatment system and a pyrolysis treatment method for pyrolyzing an oxygen-containing material to be treated, such as biomass or municipal waste, and recovering oil from the generated pyrolysis gas. [Background technology]

[0002] Development of material recycling and chemical recycling, which treat and reuse oxygen-containing materials such as biomass and municipal waste, is progressing. In particular, chemical recycling, which uses a pyrolysis furnace to recover oil from biomass, is attracting attention.

[0003] Fluidized bed furnaces used in chemical recycling have a structure in which the interior of the furnace is divided into a pyrolysis furnace and a media regeneration furnace by a partition wall. The bed material circulates between the pyrolysis furnace and the media regeneration furnace, while the material to be treated, such as biomass, is fed into the pyrolysis furnace. The material to be treated is heated by the bed material in the pyrolysis furnace, and most of it is gasified through pyrolysis. The residue of the material to be treated is transported by the bed material to the media regeneration furnace. The residue of the material to be treated is burned in the media regeneration furnace to heat the bed material. The heated bed material moves into the pyrolysis furnace, where it functions as a heat source. A fluidized bed furnace in which the bed material circulates inside the furnace in this way is called an internal circulating fluidized bed gasification system.

[0004] The material to be treated generates pyrolysis gas through thermal decomposition. The gaseous hydrocarbons contained in this pyrolysis gas are condensed to recover cracked oil. The above-mentioned internal circulating fluidized bed gasification system is expected to be a technology that can pyrolyze the material to be treated and recover cracked oil and cracked gas from the material as pyrolysis products. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6933577 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the cracked oil recovered by pyrolysis of the material being treated contains a large amount of oxygen, making it of low quality as a chemical feedstock or fuel, making it difficult to use as a basic chemical product or in engines or high-efficiency power generation equipment. Bio-oil, in particular, obtained by pyrolysis of biomass, has a high oxygen content and a calorific value less than half that of petroleum-based fuel oil. Furthermore, water and acid by-products can corrode equipment, leading to increased coke production and fouling of equipment and catalysts.

[0007] Therefore, the present invention provides a pyrolysis-type processing system and a pyrolysis-type processing method that can recover high-quality oil from an oxygen-containing processing target such as biomass. [Means for solving the problem]

[0008] In one aspect, a pyrolysis-type treatment system for treating an oxygen-containing treatment object is provided, which includes a pyrolysis furnace that generates pyrolysis gas by thermally decomposing the treatment object, a hydrotreating device that performs hydrotreating on the pyrolysis gas, and a condensation device that condenses oil components and moisture in the hydrotreating pyrolysis gas to separately recover oil and light gas.

[0009] In one embodiment, the pyrolysis-type processing system further includes a gas separation device that recovers a reducing gas from the light gas, and a reducing gas transfer line that transfers the reducing gas to at least one of the pyrolysis furnace and the hydroreforming device. In one aspect, the pyrolysis furnace is a fluidized bed furnace, and the fluidized bed furnace has the pyrolysis furnace and a media regeneration furnace through which a fluidized medium circulates, and the pyrolysis treatment system further includes a fuel line that supplies the light gas from which the reducing gas has been removed by the gas separation device to the media regeneration furnace.

[0010] In one embodiment, the pyrolysis treatment system further includes a solid-gas separation device disposed between the pyrolysis furnace and the hydroreforming device, which separates particles from the pyrolysis gas discharged from the pyrolysis furnace. In one aspect, the pyrolysis treatment system further includes a heat recovery device that supplies heat to the pyrolysis furnace, and a fuel line that supplies the light gas from which the reducing gas has been removed by the gas separation device to the heat recovery device. In one embodiment, the condensing device includes an oil scrubber and a water scrubber. In one embodiment, the pyrolysis-type treatment system further includes an oil-water separator that separates the oil-water mixture discharged from the water scrubber into oil and water.

[0011] In one aspect, a pyrolysis-type treatment method is provided for treating an oxygen-containing treatment object, which comprises generating a pyrolysis gas by thermally decomposing the treatment object in a pyrolysis furnace, hydrotreating the pyrolysis gas in a hydrotreating reforming device, condensing the oil components and moisture in the hydrotreated pyrolysis gas in a condensation device, and separately recovering the oil and light gas.

[0012] In one embodiment, the pyrolysis-type processing method further includes recovering a reducing gas from the light gas using a gas separator and transferring the reducing gas to at least one of the pyrolysis furnace and the hydroreforming unit. In one aspect, the pyrolysis furnace is a fluidized bed furnace, and the fluidized bed furnace has the pyrolysis furnace and a medium regeneration furnace through which a fluidized medium circulates, and the pyrolysis treatment method further includes supplying the light gas from which the reducing gas has been removed by the gas separation device to the medium regeneration furnace.

[0013] In one embodiment, the pyrolysis-type treatment method further includes separating particles from the pyrolysis gas discharged from the pyrolysis furnace by a solid-gas separator disposed between the pyrolysis furnace and the hydroreforming unit. In one aspect, the pyrolysis treatment method further includes supplying the light gas from which the reducing gas has been removed by the gas separation device to a heat recovery device for combustion, and supplying the heat generated by the combustion of the light gas to the pyrolysis furnace. In one embodiment, the condensing device includes an oil scrubber and a water scrubber. In one embodiment, the pyrolysis-type treatment method further comprises separating the oil-water mixture discharged from the water scrubber into oil and water. [Effects of the Invention]

[0014] The hydrotreating unit adds hydrogen gas to the pyrolysis gas, causing the oxygen contained in the pyrolysis gas to react with the hydrogen. The water produced by the hydrotreating is condensed in a condenser. The liquid oil and water are separated, allowing the oil to be recovered. In particular, because the hydrotreating is carried out before the water and oil components are condensed, the high heat of the pyrolysis gas coming out of the pyrolysis furnace can be used directly to hydrotreat the pyrolysis gas. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a block diagram illustrating one embodiment of a pyrolysis-type processing system. [Figure 2] FIG. 10 is a block diagram illustrating another embodiment of a pyrolysis-type processing system. [Figure 3] FIG. 10 is a block diagram illustrating yet another embodiment of a pyrolysis-type processing system. [Figure 4] FIG. 10 is a block diagram illustrating yet another embodiment of a pyrolysis-type processing system. [Figure 5] FIG. 10 is a block diagram illustrating yet another embodiment of a pyrolysis-type processing system. [Figure 6] FIG. 10 is a block diagram illustrating yet another embodiment of a pyrolysis-type processing system. [Figure 7] FIG. 10 is a block diagram illustrating yet another embodiment of a pyrolysis-type processing system. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a block diagram showing one embodiment of a pyrolysis-type treatment system for treating an oxygen-containing treatment target. The treatment target treated by the pyrolysis-type treatment system is an oxygen-containing substance such as biomass or municipal waste. In the embodiment described below, biomass, which is an example of a treatment target, is treated by the pyrolysis-type treatment system.

[0017] As shown in FIG. 1, the pyrolysis treatment system includes a pyrolysis furnace 1 that generates pyrolysis gas by pyrolyzing biomass, a hydrotreating unit 5 that hydrotreats the pyrolysis gas, and a condenser 7 that condenses the oil and water components in the hydrotreated pyrolysis gas to separately recover the oil and light gas. The pyrolysis furnace 1 is configured to heat biomass and generate pyrolysis gas by pyrolyzing the biomass. A decomposition catalyst may be added to the pyrolysis furnace 1 to promote pyrolysis. The type of pyrolysis furnace 1 in this embodiment is not particularly limited and may be, for example, a fluidized bed pyrolysis furnace (described later) or a kiln pyrolysis furnace.

[0018] The hydroreforming unit 5 is disposed downstream of the pyrolysis furnace 1, and the pyrolysis gas generated by the pyrolysis furnace 1 is sent to the hydroreforming unit 5. The hydroreforming unit 5 adds hydrogen gas to the pyrolysis gas at high temperatures, causing the oxygen contained in the pyrolysis gas to react with the hydrogen. The pyrolysis gas sent to the hydroreforming unit 5 is a high-temperature gas (e.g., 400 to 600°C) discharged from the pyrolysis furnace 1, so the hydroreforming unit 5 can directly utilize the high heat of the pyrolysis gas to perform hydrotreatment on the pyrolysis gas.

[0019] The pyrolysis-type processing system includes a hydrogen gas supply source 10 that supplies hydrogen gas to the hydro-reforming apparatus 5. The hydrogen gas supply source 10 is connected to the hydro-reforming apparatus 5. An example of the hydrogen gas supply source 10 is a hydrogen gas cylinder.

[0020] The condenser 7 is disposed downstream of the hydroreforming unit 5. The condenser 7 is configured to cool the pyrolysis gas and condense the oil component and water in the pyrolysis gas. Specific examples of the condenser 7 include a heat exchanger (specific examples include a multi-tube type, a spiral type, and a plate type), an oil scrubber, a water scrubber, and combinations thereof.

[0021] In one example, the pyrolysis gas is cooled to 40°C by the condenser 7. Therefore, oil components and water with boiling points of 40°C or higher are condensed in the condenser 7 and discharged as an oil-water mixture. The oil-water mixture and light gas are discharged separately from the condenser 7. The oil-water mixture is sent to the oil reservoir 12. The oil-water mixture is separated into oil and water in the oil reservoir 12. The oil is recovered as cracked oil or reformed oil, and the water is discharged from the bottom of the oil reservoir 12.

[0022] The light gases discharged from the condenser 7 include, for example, hydrogen (H), methane (CH), ethane (CH), liquefied petroleum gas (LPG), carbon monoxide (CO), and carbon dioxide (CO). The light gases are sent to a combustion treatment device (not shown) and are combusted.

[0023] The hydroreforming unit 5 is disposed upstream of the condenser 7 and performs hydrotreating on the pyrolysis gas before the pyrolysis gas is cooled in the condenser 7 (i.e., before the water and oil components in the pyrolysis gas are condensed). Therefore, the hydroreforming unit 5 can directly use the high heat of the pyrolysis gas discharged from the pyrolysis furnace 1 for hydrotreating, and does not require a heating device or energy to heat the pyrolysis gas.

[0024] Figure 2 is a block diagram showing one embodiment of a pyrolysis-type treatment system. The configuration and operation of this embodiment, which are not specifically described, are the same as those of the embodiment described with reference to Figure 1, and therefore, redundant description will be omitted. The pyrolysis-type treatment system of the embodiment shown in Figure 2 further includes a gas separation device 15 that recovers a reducing gas from the light gas discharged from the condenser 7, and a reducing gas transfer line 17 that transfers a reducing gas containing hydrogen gas to the pyrolysis furnace 1 and the hydroreforming device 5.

[0025] Gas separation device 15 is disposed downstream of condenser 7, and the light gas discharged from condenser 7 is sent to gas separation device 15. There are no particular limitations on the specific configuration of gas separation device 15, but for example, a pressure swing adsorption device (PSA) or a gas separation membrane can be used for gas separation device 15. The reducing gas recovered in gas separation device 15 is transferred through reducing gas transfer line 17 to pyrolysis furnace 1 and, if necessary, to hydroreforming device 5.

[0026] 2, the gas separation device 15 is configured to recover hydrogen gas, methane, ethane, and carbon monoxide gas, which have small molecular weights, from light gases. The hydrogen gas, carbon monoxide gas, and other gases recovered by the gas separation device 15 are transferred as reducing gases through a reducing gas transfer line 17 to the pyrolysis furnace 1 and, if necessary, to the hydroreforming device 5. The reducing gas containing at least hydrogen gas is sent to the pyrolysis furnace 1, which makes it possible to suppress the generation of coke during the pyrolysis of biomass.

[0027] The hydrogen gas supply source 10 described above is connected to a reducing gas transfer line 17. In this embodiment, the reducing gas transfer line 17 extends from the gas separation device 15 to both the pyrolysis furnace 1 and the hydroreforming device 5. The hydrogen gas sent to the pyrolysis furnace 1 also functions as a purge gas within the pyrolysis furnace 1. The purge gas is a gas for discharging pyrolysis gas remaining in the pyrolysis furnace 1 downstream and may be used to adjust the residence time of the pyrolysis gas. When the amount of reducing gas required in the pyrolysis furnace 1 and the hydroreforming device 5 exceeds the amount of purge gas, the required reducing gas is supplied directly to the hydroreforming device 5.

[0028] In one embodiment, the reducing gas transfer line 17 may extend from the gas separator 15 to either the pyrolysis furnace 1 or the hydroreforming unit 5. In this configuration, the reducing gas recovered in the gas separator 15 is sent to the hydroreforming unit 5 either via the pyrolysis furnace 1 or bypassing the pyrolysis furnace 1.

[0029] The hydrogen gas contained in the light gas discharged from the condenser 7 is recovered by the gas separator 15 and is used again for the hydrotreating in the hydroreforming apparatus 5. That is, the hydrogen gas required for hydrogenation is consumed while circulating between the hydroreforming apparatus 5 and the gas separator 15. According to this embodiment, the amount of hydrogen gas consumed can be reduced. Depending on the amount of hydrogen gas required for the hydroreforming in the hydroreforming apparatus 5, hydrogen gas is supplied from the hydrogen gas supply source 10 through the reducing gas transfer line 17 to the hydroreforming apparatus 5.

[0030] The pyrolysis treatment system further includes a heat recovery unit 20 that supplies heat to the pyrolysis furnace 1, and a fuel line 21 that supplies light gases from which reducing gases have been removed by the gas separation unit 15 to the heat recovery unit 20. The light gases from which reducing gases have been removed include, for example, liquefied petroleum gases (LPG) such as propane and butane, which have larger molecular weights, and carbon dioxide (CO2), and are combusted as fuel in the heat recovery unit 20 to generate heat. The heat generated in the heat recovery unit 20 is consumed as a heat source for the pyrolysis furnace 1 (for example, a kiln-type pyrolysis furnace).

[0031] Figure 3 is a block diagram showing one embodiment of a thermal cracking treatment system. The configuration and operation of this embodiment, which are not particularly described, are the same as those of the embodiment described with reference to Figure 2, so duplicated explanations will be omitted. The thermal cracking treatment system of the embodiment shown in Figure 3 further includes a hydrocracker 25 connected to the oil reservoir 12 and a distillation column 28 connected to the hydrocracker 25.

[0032] A portion or all of the oil in the oil reservoir 12 is transferred to a hydrocracker 25 by a pump 30. The hydrocracker 25 is configured to further hydrotreat the oil recovered in the oil reservoir 12 at high temperatures (e.g., 400 to 600°C) and under pressure (e.g., 1 MPa or higher). The hydrogen gas used for the hydrotreating in the hydrocracker 25 is supplied from a hydrogen gas supply source 10. The hydrotreating in the hydrocracker 25 removes trace amounts of oxygen, sulfur, nitrogen, and the like contained in the oil.

[0033] The oil hydrotreated in the hydrocracker 25 is sent to a distillation column 28, where it is separated into light oil and heavy oil. The hydrogen, hydrogen sulfide, and ammonia discharged from the distillation column 28 are sent to the gas separation unit 15. The water condensed and separated in the distillation column 28 is discharged from an auxiliary facility of the distillation column 28.

[0034] The hydrocracker 25 and distillation column 28 shown in FIG. 3 are appropriately provided based on the quality required for the oil recovered in the oil reservoir 12.

[0035] Fig. 4 is a block diagram showing an embodiment of a pyrolysis-type processing 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. 3, and therefore, redundant description will be omitted.

[0036] The pyrolysis treatment system of the embodiment shown in Fig. 4 includes a fluidized-bed furnace 40 that pyrolyzes and combusts biomass, which is an example of an oxygen-containing treatment target. The fluidized-bed furnace 40 includes a pyrolysis furnace 1 that pyrolyzes biomass and generates pyrolysis gas, and a media regeneration furnace 44 that combusts the pyrolyzed biomass residue. The heat recovery device 20 shown in Fig. 3 is not provided in the embodiment of Fig. 4.

[0037] The pyrolysis furnace 1 and the media regeneration furnace 44 are formed within a single fluidized bed furnace 40. That is, the interior of the fluidized bed furnace 40 is separated into the pyrolysis furnace 1 and the media regeneration furnace 44 by a partition wall 45. Biomass, which is the raw material, is supplied into the pyrolysis furnace 1 by a raw material supply device (not shown). The overall shape of the fluidized bed furnace 40 is not particularly limited, but may be, for example, cylindrical or rectangular.

[0038] A fluidized medium (e.g., silica sand) is contained in the pyrolysis furnace 1 and the media regeneration furnace 44. A fluidizing gas is supplied to the pyrolysis furnace 1 and the media regeneration furnace 44 to fluidize the fluidized medium. The fluidizing gas supplied to the pyrolysis furnace 1 is composed of a reducing gas containing hydrogen gas recovered in the gas separation device 15 and fresh hydrogen gas supplied from the hydrogen gas supply source 10. That is, the reducing gas containing hydrogen gas recovered in the gas separation device 15 is introduced into the pyrolysis furnace 1 together with the fresh hydrogen gas through the reducing gas transfer line 17, and serves as the fluidizing gas to fluidize the fluidized medium. Compressed air is supplied to the media regeneration furnace 44 as the fluidizing gas.

[0039] Biomass is fed into the pyrolysis furnace 1 while the bed material circulates between the pyrolysis furnace 1 and the media regeneration furnace 44. The biomass is heated by the bed material in the pyrolysis furnace 1 and pyrolyzed to produce pyrolysis gas. The biomass residue is transported by the bed material to the media regeneration furnace 44. The biomass is combusted in the media regeneration furnace 44 to heat the bed material. The heated bed material moves into the pyrolysis furnace 1 and functions as a heat source within the pyrolysis furnace 1. The fluidized bed furnace 40, in which the bed material circulates within the furnace in this way, is an internal circulating fluidized bed gasification system.

[0040] The pyrolysis treatment system further includes a solid-gas separator 50 that separates particles from the pyrolysis gas discharged from the pyrolysis furnace 1. Specific examples of particles removed by the solid-gas separator 50 include polymers and coke residues produced during the pyrolysis of biomass, fluidized bed materials (e.g., silica sand fine powder), and catalyst fines. An example of the solid-gas separator 50 is a cyclone-type solid-gas separator that separates particles from the pyrolysis gas by centrifugal force.

[0041] The solid-gas separator 50 is disposed between the pyrolysis furnace 1 and the hydroreforming unit 5, and the pyrolysis gas discharged from the pyrolysis furnace 1 is led to the solid-gas separator 50. The particles removed by the solid-gas separator 50 are returned to the media regeneration furnace 44. In one embodiment, the particles removed by the solid-gas separator 50 may be returned to the pyrolysis furnace 1. The particles in the pyrolysis gas are removed by the solid-gas separator 50, and as a result, the quality of the oil recovered in the oil reservoir 12 at the subsequent stage can be improved.

[0042] 5 is a block diagram showing an embodiment of a pyrolysis-type processing system using a fluidized-bed furnace 40. The configuration and operation of this embodiment, which will not be specifically described, are the same as those of the embodiment described with reference to FIG. 4, and therefore, redundant description will be omitted.

[0043] The pyrolysis-type treatment system of the embodiment shown in FIG. 5 further includes an oil-water separator 53 disposed between the condenser 7 and the oil reservoir 12. The oil-water mixture produced by the condenser 7 is sent to the oil-water separator 53, which is configured to separate the oil from the water. The specific configuration of the oil-water separator 53 is not particularly limited, and for example, a coalescer or a sedimentation tank can be used as the oil-water separator 53. The oil separated by the oil-water separator 53 is sent to the oil reservoir 12 and stored therein. The water separated from the oil by the oil-water separator 53 is discharged from the oil-water separator 53.

[0044] 6 is a block diagram showing another embodiment of a pyrolysis-type processing system using a fluidized-bed furnace 40. The configuration and operation of this embodiment, which will not be specifically described, are the same as those of the embodiment described with reference to FIG. 5, and therefore, redundant description will be omitted.

[0045] The pyrolysis treatment system of the embodiment shown in FIG. 6 further includes a scrubbing device 55 disposed between the condenser 7 and the gas separator 15. The scrubbing device 55 is configured to scrub the light gas with a scrubbing liquid by bringing the scrubbing liquid into contact with the light gas passing through the interior of the scrubbing device 55. A liquid such as water can be used as the scrubbing liquid. The specific configuration of the scrubbing device 55 used is not particularly limited, and a known scrubbing device such as a scrubber can be used. For example, the scrubbing device 55 can be a scrubbing tower having a gas passage formed therein and spray nozzles that spray water onto the gas flowing through the passage.

[0046] The light gas discharged from the condenser 7 is led to the scrubbing device 55. The hydrogen, hydrogen sulfide, and ammonia discharged from the distillation column 28 are also sent to the scrubbing device 55. The scrubbing device 55 removes water-soluble substances such as fine particles and ammonia from the light gas. The light gas that has passed through the scrubbing device 55 is sent to the gas separation device 15.

[0047] 7 is a block diagram showing yet another embodiment of a pyrolysis-type processing system using a fluidized-bed furnace 40. The configuration and operation of this embodiment, which will not be specifically described, are the same as those of the embodiment described with reference to FIG. 6, and therefore, redundant description will be omitted.

[0048] In the embodiment shown in Fig. 7, a combination of an oil scrubber 60 and a water scrubber 56 is used as the condenser 7. That is, the oil scrubber 60 and the water scrubber 56 as the condenser 7 cool the hydrotreated pyrolysis gas in two stages to condense the oil component and moisture. The oil scrubber 60 is arranged downstream of the hydroreforming unit 5. The oil scrubber 60 is connected to the hydroreforming unit 5, the water scrubber 56, and the oil reservoir 12. The pyrolysis gas hydrotreated by the hydroreforming unit 5 is led to the oil scrubber 60.

[0049] In the oil scrubber 60, the recovered heavy oil is cooled at the bottom, and then sprayed into the pyrolysis gas to cool the pyrolysis gas and condense the gaseous oil component in the pyrolysis gas. In one embodiment, oil supplied from an external source may be sprayed in the oil scrubber 60 instead of the recovered heavy oil.

[0050] In one example, the pyrolysis gas is cooled to 150°C by the oil scrubber 60. Therefore, oil components with a boiling point of 150°C or higher are condensed in the oil scrubber 60. The condensed oil and the sprayed oil are discharged from the oil scrubber 60 as heavy oil and stored in the oil reservoir 12. The specific configuration of the oil scrubber 60 to be used is not particularly limited, and a known oil scrubber can be used. For example, a wash tower having a gas passage formed therein and equipped with spray nozzles that spray oil into the gas flowing through the passage can be used as the oil scrubber 60.

[0051] The water scrubber 56 is disposed between the oil scrubber 60 and the gas separation device 15. The water scrubber 56 is further connected to the oil-water separator 53. The water scrubber 56 brings water into contact with the pyrolysis gas that has passed through the oil scrubber 60, thereby further cooling the pyrolysis gas. In this embodiment, the water scrubber 56 brings alkaline water into contact with the pyrolysis gas. The pyrolysis gas is cooled by contact with water (alkaline water in this embodiment). For example, the pyrolysis gas is cooled from 150°C to 40°C by the water scrubber 56. Therefore, the water scrubber 56 condenses oil components and moisture, whose boiling points are generally within the range of 150°C to 40°C. The oil-water mixture is discharged from the water scrubber 56 and sent to the oil-water separator 53. The oil-water separator 53 is configured to separate oil (e.g., light oil at 40°C) from the alkaline water. The pyrolysis gas from which the oil components and water have been removed by the water scrubber 56 is sent to the gas separation unit 15 as a light gas.

[0052] According to this embodiment, the oil contained in the pyrolysis gas is recovered by the oil scrubber 60 and the water scrubber 56, so that fine particles and water-soluble substance gases in the pyrolysis gas are removed and the overall oil yield is improved.

[0053] The hydrocracker 25 and the distillation column 28 shown in Figures 3 to 7 may be omitted. The embodiments described with reference to Figures 1 to 7 may be combined as appropriate. For example, the condenser 7 shown in Figure 7, which is a combination of the oil scrubber 60 and the water scrubber 56, may be applied to the embodiments described with reference to Figures 1 to 3.

[0054] The above-described embodiments have been described for the purpose of enabling a person of ordinary skill in the art to practice the present invention. Various modifications of the above-described embodiments would be obvious to a person skilled in the art, and the technical concept of the present invention may be applied to other embodiments. Therefore, the present invention is not limited to the described embodiments, but is to be interpreted in the broadest scope in accordance with the technical concept defined by the claims. [Explanation of symbols]

[0055] 1 Pyrolysis furnace 5 Hydroreforming unit 7 Condenser 10 Hydrogen gas supply source 12 Oil storage tank 15 Gas Separator 17 Reducing gas transfer line 20 Heat recovery device 21 Fuel line 25 Hydrocracker 28 Distillation Tower 40 Fluidized bed furnace 44 Media regeneration furnace 45 Partition Wall 50 Solid-gas separator 53 Oil-water separator 55 Cleaning equipment 56 Water Scrubber 60 Oil Scrubber

Claims

1. A pyrolysis-type treatment system for treating an oxygen-containing treatment object, a pyrolysis furnace for generating pyrolysis gas by thermally decomposing the object to be treated; a hydrotreating device for performing a hydrogenation treatment on the pyrolysis gas; a condensation device that condenses oil components and moisture in the hydrotreated pyrolysis gas and separately recovers oil and light gas; a gas separation device for recovering a reducing gas from the light gas; a reducing gas transfer line that transfers the reducing gas to at least one of the pyrolysis furnace and the hydroreforming device; The pyrolysis furnace is a fluidized bed pyrolysis furnace, The fluidized bed furnace has the pyrolysis furnace and a medium regeneration furnace through which a fluidized bed medium circulates, The pyrolysis-type treatment system further includes a fuel line that supplies the light gas from which the reducing gas has been removed by the gas separation device to the media regeneration furnace.

2. 2. The pyrolysis-type processing system according to claim 1, further comprising a solid-gas separator disposed between the pyrolysis furnace and the hydroreforming device, for separating particles from the pyrolysis gas discharged from the pyrolysis furnace.

3. The pyrolysis-type processing system of claim 1 , wherein the condensing device includes an oil scrubber and a water scrubber.

4. The pyrolysis-type treatment system according to claim 3 , further comprising an oil-water separator that separates the oil-water mixture discharged from the water scrubber into oil and water.

5. A pyrolysis-type treatment method for treating an oxygen-containing treatment object, comprising: generating a pyrolysis gas by pyrolyzing the object to be treated in a pyrolysis furnace; The pyrolysis gas is subjected to a hydrogenation treatment in a hydrogenation reforming device; The oil component and water in the hydrotreated pyrolysis gas are condensed by a condenser to separately recover the oil and light gas; recovering a reducing gas from the light gas using a gas separator; transferring the reducing gas to at least one of the pyrolysis furnace and the hydroreforming unit; The pyrolysis furnace is a fluidized bed pyrolysis furnace, The fluidized bed furnace has the pyrolysis furnace and a medium regeneration furnace through which a fluidized bed medium circulates, a thermal decomposition type treatment method in which the light gas from which the reducing gas has been removed by the gas separation device is supplied to the media regeneration furnace.

6. The pyrolysis-type processing method according to claim 5, further comprising separating particles from the pyrolysis gas discharged from the pyrolysis furnace by a solid-gas separator disposed between the pyrolysis furnace and the hydroreforming unit.

7. The pyrolysis-type processing method of claim 5 , wherein the condensation device includes an oil scrubber and a water scrubber.

8. 8. The pyrolysis-type treatment method of claim 7, further comprising separating the oil-water mixture discharged from the water scrubber into oil and water.

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