JP2025033410A - Pyrolysis-type processing system and pyrolysis-type processing method - Google Patents

Abstract

To provide a pyrolysis type treatment system capable of recovering high-quality oil from a processing object containing oxygen atoms, such as biomass.SOLUTION: A pyrolysis type treatment system comprises: a fluidized bed furnace 40 having a pyrolysis furnace 1 that generates pyrolysis gas by pyrolyzing a processing object, and a medium regeneration furnace 44 that combusts residue of the pyrolyzed processing object; a condensation apparatus 7 that condenses oil components and moisture in the pyrolysis gas to separately recover an oil-water mixture and light gas; a gas separation apparatus 15 that recovers reducing gas from the light gas; a reducing gas transfer line 17 that transfers the reducing gas recovered by the gas separation apparatus 15 to the pyrolysis furnace; and a fuel line 21 that transfers the light gas from which the reducing gas has been separated to the medium regeneration furnace 44.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pyrolysis processing system and a pyrolysis processing method that pyrolyzes materials containing oxygen atoms, such as biomass and municipal waste, and recovers oil from the generated pyrolysis gas.

The development of material recycling and chemical recycling, which process and reuse materials that contain oxygen atoms, such as biomass and municipal waste, is underway. In particular, there is growing interest in chemical recycling, which uses a pyrolysis furnace to recover oil from biomass.

Fluidized bed furnaces used in chemical recycling have a structure in which the inside 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, heating the bed material. The heated bed material moves into the pyrolysis furnace, where it functions as a heat source.

The material to be treated generates pyrolysis gas through pyrolysis. 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.

Patent No. 6933577

However, the cracked oil recovered by pyrolysis of the material to be treated contains many oxygen atoms, making it of low quality as a chemical feedstock or fuel, and it is difficult to use it as a basic chemical product or in engines or high-efficiency power generation equipment. In particular, bio-oil obtained by pyrolyzing biomass has a high oxygen atom content and a calorific value less than half that of petroleum-based fuel oil. Furthermore, water and acid by-products can corrode equipment, causing fouling of equipment and catalysts due to increased coke production.

Therefore, the present invention provides a pyrolysis processing system and a pyrolysis processing method that can recover high-quality oil from processing objects that contain oxygen atoms, such as biomass.

In one aspect, a pyrolysis-type treatment system for treating a treatment object containing oxygen atoms is provided, which includes a fluidized bed furnace having a pyrolysis furnace that generates pyrolysis gas by pyrolyzing the treatment object, and a media regeneration furnace that burns the pyrolyzed residue of the treatment object, a condensation device that condenses the oil components and moisture in the pyrolysis gas to separately recover an oil-water mixture and a light gas, a gas separation device that recovers a reducing gas from the light gas, a reducing gas transfer line that transfers the reducing gas recovered by the gas separation device to the pyrolysis furnace, and a fuel line that transfers the light gas from which the reducing gas has been separated to the media regeneration furnace.

In one embodiment, the fluidized bed furnace is an internal circulating fluidized bed gasification system in which a fluidizing medium circulates between the pyrolysis furnace and the media regenerator.
In one embodiment, the pyrolysis treatment system further includes a solid-gas separation device disposed between the pyrolysis furnace and the condensation device, which separates particles from the pyrolysis gas discharged from the pyrolysis furnace.
In one embodiment, the condensing unit includes an oil scrubber and a water scrubber.
In one embodiment, the pyrolysis-type treatment system further comprises an oil-water separator that separates the oil-water mixture discharged from the water scrubber into oil and water.
In one embodiment, the pyrolysis-type processing system further includes a hydrocracker that performs hydrotreatment on the oil recovered from the oil-water mixture.

In one aspect, a pyrolysis-type treatment method for treating a treatment object containing oxygen atoms is provided, which comprises: generating a pyrolysis gas by pyrolyzing the treatment object in a pyrolysis furnace of a fluidized bed furnace; condensing the oil component and water in the pyrolysis gas by a condenser to separately recover an oil-water mixture and a light gas; recovering a reducing gas from the light gas by a gas separation device; transporting the reducing gas recovered by the gas separation device to the pyrolysis furnace; subjecting the treatment object containing oxygen atoms and the pyrolysis gas in the pyrolysis furnace to hydrogenation treatment using hydrogen contained in the reducing gas; transporting the light gas from which the reducing gas has been separated as fuel to a medium regeneration furnace of the fluidized bed furnace to combust the pyrolyzed residue of the treatment object.

In one embodiment, the fluidized bed furnace is an internal circulating fluidized bed gasification system in which a fluidizing medium circulates between the pyrolysis furnace and the media regenerator.
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 condenser.
In one embodiment, the condensing unit 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.

The gas separation unit separates reducing gas, which contains hydrogen, from the pyrolysis gas. The reducing gas is sent to a pyrolysis furnace, and the hydrogen contained in the reducing gas reacts with oxygen atoms contained in the pyrolysis gas in the pyrolysis furnace, allowing the pyrolysis gas to be subjected to hydrotreating. The water produced by the hydrotreating is condensed in a condensing unit. The liquid oil and water are separated, allowing the oil to be recovered. In particular, hydrotreating in a pyrolysis furnace can directly utilize the high heat of the pyrolysis gas.

FIG. 1 is a block diagram illustrating one embodiment of a pyrolysis-type processing system. FIG. 13 is a block diagram showing another embodiment of a pyrolysis-type processing system. FIG. 13 is a block diagram showing yet another embodiment of a pyrolysis-type processing system. FIG. 13 is a block diagram showing yet another embodiment of a pyrolysis-type processing system. FIG. 13 is a block diagram showing yet another embodiment of a pyrolysis-type processing system.

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a pyrolysis-type processing system for processing a processing target containing oxygen atoms. The processing target processed by the pyrolysis-type processing system is a substance containing oxygen atoms, such as biomass or municipal waste. In the embodiment described below, biomass, which is an example of a processing target, is processed by the pyrolysis-type processing system.

As shown in FIG. 1, the pyrolysis treatment system includes a fluidized bed furnace 40 that pyrolyzes and further combusts biomass, which is an example of a treatment target that contains oxygen atoms. 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 residue of the pyrolyzed biomass.

The pyrolysis furnace 1 and the media regeneration furnace 44 are formed in one fluidized bed furnace 40. That is, the interior of the fluidized bed furnace 40 is divided into the pyrolysis furnace 1 and the media regeneration furnace 44 by a partition wall 45. Biomass, which is the object to be treated, 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 is, for example, cylindrical or rectangular.

The pyrolysis furnace 1 is configured to generate pyrolysis gas by heating the biomass and pyrolyzing the biomass. A decomposition catalyst may be added to the pyrolysis furnace 1 to promote pyrolysis.

The pyrolysis processing system includes a hydrogen gas supply source 10 that supplies hydrogen gas to the pyrolysis furnace 1. The hydrogen gas supply source 10 is connected to the pyrolysis furnace 1. An example of the hydrogen gas supply source 10 is a hydrogen gas cylinder.

The pyrolysis furnace 1 and the media regeneration furnace 44 contain a fluidized medium (e.g., silica sand). To fluidize the fluidized medium, a fluidizing gas is supplied to the pyrolysis furnace 1 and the media regeneration furnace 44. The fluidizing gas to the pyrolysis furnace 1 is composed of a reducing gas containing hydrogen gas recovered in the gas separation device 15 described below, 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 to the pyrolysis furnace 1 through the reducing gas transfer line 17 together with the fresh hydrogen gas, 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.

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 generate pyrolysis gas. The biomass residue is transported by the bed material to the media regeneration furnace 44. The biomass residue is burned 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 for pyrolysis in the pyrolysis furnace 1. The fluidized bed furnace 40, in which the bed material circulates within the furnace in this manner, is an internal circulating fluidized bed gasification system.

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 polymeric polymers and coke residues generated during pyrolysis of biomass, fluidized media (e.g., silica sand fine powder), and catalyst fine powder. 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.

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 downstream oil storage tank 12 can be improved.

The pyrolysis treatment system includes a condenser 7 that condenses the oil and water components in the pyrolysis gas generated in the pyrolysis furnace 1 to separately recover an oil-water mixture and light gas. The condenser 7 is disposed downstream of the pyrolysis furnace 1. In the embodiment shown in FIG. 1, the condenser 7 is disposed downstream of the solid-gas separator 50. The condenser 7 is configured to cool the pyrolysis gas and condense the oil and water components in the pyrolysis gas. Specific examples of the condenser 7 include a heat exchanger (specific examples include a multi-tube type, a spiral type, a plate type, etc.), an oil scrubber, a water scrubber, and combinations thereof.

In one example, the pyrolysis gas is cooled to 40°C by the condenser 7. Thus, in the condenser 7, oil components and water with boiling points of 40°C or higher are condensed 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.

The light gases discharged from the condenser 7 include, for example, hydrogen (H ₂ ), methane (CH ₄ ), ethane (C ₂ H ₆ ), liquefied petroleum gas (LPG), carbon monoxide (CO), and carbon dioxide (CO ₂ ).

The pyrolysis treatment system further includes a gas separation device 15 that recovers reducing gas containing hydrogen gas from the light gas discharged from the condensation device 7, and a reducing gas transfer line 17 that transfers the reducing gas containing hydrogen gas to the pyrolysis furnace 1.

The gas separation device 15 is disposed downstream of the condensation device 7, and the light gas discharged from the condensation device 7 is sent to the gas separation device 15. The specific configuration of the gas separation device 15 is not particularly limited, but for example, a pressure swing adsorption device (PSA) or a gas separation membrane can be used for the gas separation device 15. The reducing gas separated from the pyrolysis gas by the gas separation device 15 is transferred to the pyrolysis furnace 1 through the reducing gas transfer line 17.

The gas separation device 15 is configured to recover (separate) reducing gases, including hydrogen gas, methane, ethane, and carbon monoxide gas, which have small molecular weights, from light gases. The reducing gases, including hydrogen gas, are sent to the pyrolysis furnace 1, so that the generation of coke during the pyrolysis of biomass in the pyrolysis furnace 1 can be suppressed.

In the pyrolysis furnace 1, the hydrogen gas contained in the reducing gas is added to the pyrolysis gas at high temperature, and the biomass and pyrolysis gas in the pyrolysis furnace 1 are subjected to hydrogenation treatment. That is, oxygen atoms contained in the biomass and pyrolysis gas react with hydrogen to form moisture. As a result, oxygen atoms are removed from the biomass and pyrolysis gas. Since the pyrolysis gas in the pyrolysis furnace 1 is at high temperature (for example, 400 to 600°C), the high heat of the pyrolysis gas can be used directly to perform hydrogenation treatment on the pyrolysis gas. The condensation device 7 cools the pyrolysis gas that has been hydrogenated in the pyrolysis furnace 1, and condenses the oil components and moisture in the pyrolysis gas. The liquid oil and water are separated, so the oil can be recovered.

The hydrogen gas supply source 10 is connected to the reducing gas transfer line 17. The reducing gas transfer line 17 extends from the gas separation device 15 to the pyrolysis furnace 1. Thus, the hydrogen gas supply source 10 is connected to the pyrolysis furnace 1 via the reducing gas transfer line 17. The hydrogen gas sent to the pyrolysis furnace 1 also functions as a purge gas in 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.

The hydrogen gas contained in the light gas discharged from the condenser 7 is recovered by the gas separator 15 and used again for the hydrogenation process in the pyrolysis furnace 1. That is, the hydrogen gas required for the hydrogenation process is consumed while circulating between the pyrolysis furnace 1 and the gas separator 15. According to this embodiment, the consumption of hydrogen gas required for the hydrogenation process can be reduced. Depending on the amount of hydrogen gas required for the hydrogenation process in the pyrolysis furnace 1, hydrogen gas is supplied to the pyrolysis furnace 1 from the hydrogen gas supply source 10 through the reducing gas transfer line 17.

The pyrolysis type treatment system further includes a fuel line 21 that supplies the light gas from which the reducing gas has been separated by the gas separation device 15 to the media regeneration furnace 44 of the fluidized bed furnace 40. The light gas from which the reducing gas has been separated includes, for example, liquefied petroleum gas (LPG) such as propane and butane having a larger molecular weight, and carbon dioxide (CO ₂ ), and is combusted as fuel in the media regeneration furnace 44. The biomass residue pyrolyzed in the pyrolysis furnace 1 is sent to the media regeneration furnace 44 and combusted in the media regeneration furnace 44. The heat generated by the combustion heats the fluidized medium, and the heated fluidized medium is sent to the pyrolysis furnace 1 and used as a heat source for pyrolysis in the pyrolysis furnace 1.

Figure 2 is a block diagram showing another embodiment of a pyrolysis type treatment system. The configuration and operation of this embodiment that are not specifically described are the same as the embodiment described with reference to Figure 1, so duplicated descriptions will be omitted. The pyrolysis type treatment system of the embodiment shown in Figure 2 further includes a hydrocracker 25 connected to the oil storage tank 12, and a distillation column 28 connected to the hydrocracker 25.

A part or all of the oil in the oil storage tank 12 is transferred to the hydrocracker 25 by the pump 30. The hydrocracker 25 is configured to further carry out hydrotreating of the oil recovered in the oil storage tank 12 at high temperature (e.g., 400 to 600°C) and under pressure (e.g., 1 MPa or more). Hydrogen gas used for hydrotreating in the hydrocracker 25 is supplied from the hydrogen gas supply source 10. Trace amounts of oxygen atoms, sulfur atoms, nitrogen atoms, etc. contained in the oil are removed by the hydrotreating in the hydrocracker 25.

The oil hydrotreated by the hydrocracker 25 is sent to the distillation tower 28, where it is separated into light oil and heavy oil. The hydrogen, hydrogen sulfide, and ammonia discharged from the distillation tower 28 are sent to the gas separation unit 15. The water condensed and separated in the distillation tower 28 is discharged from the auxiliary equipment of the distillation tower 28.

The hydrocracking unit 25 and distillation column 28 shown in FIG. 2 are appropriately installed based on the quality required for the oil recovered in the oil storage tank 12.

Figure 3 is a block diagram showing yet another embodiment of a pyrolysis-type processing 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 2, and therefore will not be described again.

The pyrolysis treatment system of the embodiment shown in FIG. 3 further includes an oil-water separator 53 disposed between the condenser 7 and the oil storage tank 12. The oil-water mixture generated 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, but for example, a coalescer or a sedimentation tank can be used for the oil-water separator 53. The oil separated by the oil-water separator 53 is sent to the oil storage tank 12 and stored in the oil storage tank 12. The water separated from the oil by the oil-water separator 53 is discharged from the oil-water separator 53.

Figure 4 is a block diagram showing yet another embodiment of a pyrolysis-type processing 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 3, and therefore will not be described again.

The pyrolysis treatment system of the embodiment shown in FIG. 4 further includes a cleaning device 55 disposed between the condensation device 7 and the gas separation device 15. The cleaning device 55 is configured to clean the light gas with a cleaning liquid by bringing the cleaning liquid into contact with the light gas passing through the inside of the cleaning device 55. A liquid such as water can be used as the cleaning liquid. The specific configuration of the cleaning device 55 used is not particularly limited, and a known cleaning device such as a scrubber can be used. For example, a cleaning tower having a gas passage formed therein and a spray nozzle that sprays water on the gas flowing through the passage can be used as the cleaning device 55.

The light gas discharged from the condensation device 7 is led to the scrubbing device 55. The hydrogen, hydrogen sulfide, and ammonia discharged from the distillation tower 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.

Figure 5 is a block diagram showing yet another embodiment of a pyrolysis-type processing 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 3, and therefore will not be described again.

In the embodiment shown in FIG. 5, a combination of an oil scrubber 60 and a water scrubber 56 is used as the condensation device 7. That is, the oil scrubber 60 and the water scrubber 56 as the condensation device 7 cool the hydrotreated pyrolysis gas in two stages and condense the oil components and moisture. The oil scrubber 60 is arranged downstream of the pyrolysis furnace 1. In the embodiment shown in FIG. 5, the oil scrubber 60 is arranged downstream of the solid-gas separation device 50. The oil scrubber 60 is connected to the pyrolysis furnace 1, the water scrubber 56, and the oil storage tank 12. The pyrolysis gas hydrotreated in the pyrolysis furnace 1 is led to the oil scrubber 60 via the solid-gas separation device 50.

The oil scrubber 60 cools the heavy oil recovered at its bottom, and then sprays the heavy oil into the pyrolysis gas to cool the pyrolysis gas and condense the gaseous oil components in the pyrolysis gas. In one embodiment, oil supplied from outside may be sprayed inside the oil scrubber 60 instead of the recovered heavy oil.

In one example, the pyrolysis gas is cooled to 150°C by the oil scrubber 60. Thus, 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 storage tank 12. The specific configuration of the oil scrubber 60 used is not particularly limited, and a known oil scrubber can be used. For example, a washing tower having a gas passage formed therein and a spray nozzle that sprays oil into the gas flowing through the passage can be used as the oil scrubber 60.

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. Thus, in the water scrubber 56, oil components and moisture whose boiling points are generally within the range of 150°C to 40°C are condensed. 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 as a light gas to the gas separation device 15.

In this embodiment, the oil contained in the pyrolysis gas is recovered by the oil scrubber 60 and the water scrubber 56, which removes fine particles and water-soluble gases from the pyrolysis gas and improves the overall oil yield.

The hydrocracker 25 and distillation column 28 shown in Figures 2 to 5 may be omitted. The embodiments described with reference to Figures 1 to 5 may be combined as appropriate. For example, the condenser 7 consisting of a combination of the oil scrubber 60 and the water scrubber 56 shown in Figure 5 may be applied to the embodiment described with reference to Figure 1 or 2.

The above-described embodiments have been described for the purpose of enabling a person having ordinary knowledge in the technical field to which the present invention pertains to practice the present invention. Various modifications of the above-described embodiments would naturally be possible for a person skilled in the art, and the technical concept of the present invention may also 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 scope of the claims.

REFERENCE SIGNS LIST 1 Pyrolysis furnace 7 Condensation device 10 Hydrogen gas supply source 12 Oil storage tank 15 Gas separation device 17 Reducing gas transfer line 21 Fuel line 25 Hydrocracking device 28 Distillation column 40 Fluidized bed furnace 44 Media regeneration furnace 45 Partition wall 50 Solid-gas separation device 53 Oil-water separator 55 Cleaning device 56 Water scrubber 60 Oil scrubber

Claims (11)

A pyrolysis type processing system for processing a processing object containing oxygen atoms,
a fluidized bed furnace having a pyrolysis furnace for generating pyrolysis gas by pyrolyzing the object to be treated, and a medium regeneration furnace for burning a residue of the pyrolyzed object to be treated;
A condensation device that condenses the oil component and moisture in the pyrolysis gas to separately recover an oil-water mixture and a light gas;
a gas separation device for recovering a reducing gas from the light gas;
a reducing gas transfer line for transferring the reducing gas recovered by the gas separation device to the pyrolysis furnace;
A pyrolysis-type processing system comprising a fuel line transporting the light gases from which the reducing gases have been separated to the media regenerator. The pyrolysis type processing system according to claim 1, wherein the fluidized bed furnace is an internal circulating fluidized bed gasification system in which a fluidized medium circulates between the pyrolysis furnace and the medium regeneration furnace. The pyrolysis processing system according to claim 1, further comprising a solid-gas separator disposed between the pyrolysis furnace and the condenser, for separating particles from the pyrolysis gas discharged from the pyrolysis furnace. The pyrolysis-type treatment system of claim 1, wherein the condensation device includes an oil scrubber and a water scrubber. The pyrolysis treatment system according to claim 4, further comprising an oil-water separator that separates the oil-water mixture discharged from the water scrubber into oil and water. The pyrolysis-type processing system according to claim 1, further comprising a hydrocracker that performs hydrotreating on the oil recovered from the oil-water mixture. A pyrolysis-type processing method for processing a processing object containing oxygen atoms, comprising the steps of:
The material to be treated is thermally decomposed in a pyrolysis furnace of a fluidized bed furnace to generate a pyrolysis gas;
The oil component and water in the pyrolysis gas are condensed by a condenser to separately recover an oil-water mixture and a light gas;
recovering a reducing gas from the light gas by a gas separation device;
The reducing gas recovered by the gas separation device is transferred to the pyrolysis furnace, and a hydrogenation process is performed on the treatment target containing oxygen atoms and the pyrolysis gas in the pyrolysis furnace using hydrogen contained in the reducing gas;
A pyrolysis type treatment method, comprising transferring the light gas from which the reducing gas has been separated as fuel to a medium regeneration furnace of the fluidized bed furnace, and burning the pyrolyzed residue of the treatment object. The pyrolysis-type processing method according to claim 7, wherein the fluidized bed furnace is an internal circulating fluidized bed gasification system in which a fluidized medium circulates between the pyrolysis furnace and the medium regeneration furnace. The pyrolysis type processing method according to claim 7, 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 condenser. The pyrolysis-type processing method according to claim 7, wherein the condensation device includes an oil scrubber and a water scrubber. The pyrolysis-type treatment method according to claim 10, further comprising separating the oil-water mixture discharged from the water scrubber into oil and water.

Images