JP2001121125A - Thermal decomposition system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a material to be treated changed into a thermal decomposition furnace from being softened, fused and stuck to an inner wall even at the time of increasing the heat transmission surface temperature of the thermal decomposition furnace, to substantially improve a heat transmission coefficient inside the thermal decomposition furnace and to miniaturize the thermal decomposition furnace. SOLUTION: The material 2 to be treated supplied from a storage device 4 and granular solids 5 supplied from a granular solid storage device 6 are dried while being mixed by a preliminary drying treatment device 7. Then, they are changed into the thermal decomposition furnace 8 to apply a thermal decomposition treatment thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal decomposition system for thermally decomposing waste containing organic matter or a supply containing organic matter, and more particularly, to thermal decomposition of waste and waste in a pyrolysis furnace. The present invention relates to a thermal decomposition processing system that prevents an object from adhering to an inner wall surface and stabilizes a thermal decomposition processing step.

[0002]

2. Description of the Related Art One of a system for decomposing and processing an object to be treated such as waste containing organic matter or a supply containing organic matter.
First, a thermal decomposition treatment system has been conventionally known.

[0003] The thermal decomposition processing system includes a crushing apparatus for crushing objects to be treated such as garbage collected from homes and offices, and a preliminary apparatus for drying the objects crushed by the crushing apparatus. 500-700 ° C. for the drying treatment device and the object to be dried which has been dried by the preliminary drying treatment device.
A thermal decomposer that blasts the heated air into a convective heat transfer system to produce a solid residue and a pyrolysis gas. The residue is guided to a melting device to be melted, and the pyrolysis gas obtained by the pyrolysis device is guided to a pyrolysis gas treatment facility for detoxification.

[0004]

However, such a conventional thermal decomposition processing system has the following problems.

[0005] First, if the object to be thermally decomposed in the pyrolysis apparatus contains excessive moisture, the temperature in the pyrolysis furnace constituting the pyrolysis apparatus will not rise sufficiently, and the pyrolysis gas will be reduced. Because it causes trouble, the pre-drying equipment must heat the object to be processed, which not only consumes extra energy, but also supplies it to the pyrolysis furnace. Since the temperature of the hot air must be 500 to 700 ° C., there is a problem that a large amount of fuel is required and it is difficult to reduce the operating cost.

[0006] Further, since the temperature of the hot air supplied to the pyrolysis furnace is set at 500 to 700 ° C, when plastics and the like are mixed in the object to be treated introduced into the pyrolysis furnace, the plastic is not heated. There is a problem in that the softening and melting are performed and adhere to and grow on the inner wall of the pyrolysis furnace, the stirring member, and the like, thereby deteriorating the function of the pyrolysis furnace.

Further, when the temperature of the hot air is increased in order to increase the thermal decomposition efficiency of the thermal decomposition furnace, the chlorine component of the chlorinated plastics mixed in the object to be treated is separated, and dioxin and the like are generated. Therefore, there is a problem that the temperature of the hot air supplied to the heating furnace must be strictly controlled.

Further, since the hot air obtained by burning the fuel is supplied into the pyrolysis furnace, a large amount of oxygen remains in the hot air supplied to the pyrolysis furnace, and the oxygen is injected into the pyrolysis furnace. The burned object may be burned out, and the pyrolyzed gas and water vapor etc., which are discharged from the processed object, move with the movement of the processed object put in the previous stage of the pyrolysis furnace. There is a problem that it is difficult to maintain a reducing atmosphere necessary for the thermal decomposition treatment on the downstream side of the furnace.

Furthermore, since a large amount of hot air must be supplied into the pyrolysis furnace, not only a large amount of pyrolysis gas is discharged from the pyrolysis furnace, but also a large amount of oxygen remains in the pyrolysis gas. Therefore, a fire may occur in a pyrolysis gas treatment facility that processes pyrolysis gas exhausted from the pyrolysis furnace.

Therefore, as a method for solving these problems, a conduction electrothermal type pyrolysis furnace has been developed.

In this pyrolysis furnace, since the steam and gas components emitted from the heated object to be processed are sucked and exhausted outside the pyrolysis furnace, the partial pressure of steam and the vapor gas component on the surface of the object to be processed are reduced. Since it is only necessary to supply air into the pyrolysis furnace in an amount that can lower the partial pressure and secure the driving force of the pyrolysis furnace, the heat discharged from the pyrolysis furnace can be reduced. The temperature, amount, and oxygen amount of the cracked gas can be kept low, and almost only steam can be used, so that the cracked gas can be easily treated in the cracked gas treatment facility.

In addition, since this thermal decomposition furnace has a partition type heat transfer structure, there is an advantage that various heat sources can be used as a heating source necessary for thermally decomposing an object to be processed. is there.

[0013] However, in such a conduction electrothermal type pyrolysis furnace, since the heat transmission coefficient in the pyrolysis furnace cannot be increased, the inner wall area of the pyrolysis furnace must be increased. However, there is a problem that only the pyrolysis furnace becomes large.

Further, if plastics are mixed in the object to be treated, the plastics soften and melt in the pyrolysis furnace, adhere to the heat transfer surface of the pyrolysis furnace, grow, and have a heat transfer resistance. Increases, thereby significantly lowering the thermal decomposition efficiency, and also makes it difficult for the object to flow inside the thermal decomposition furnace, and in the worst case, the inside of the thermal decomposition furnace is closed. For this reason, the temperature of the inner wall surface can be raised only up to about 120 ° C., and there is a problem that it is difficult to reduce the size of the thermal decomposition furnace.

[0015] In such a thermal decomposition treatment system, the object to be treated is crushed by a crushing device, and the material to be treated is temporarily stored in a storage tank before being put into a predrying device. Organic matter such as paper, kitchen waste, fiber, wood, bamboo, etc. in the material is fermented and its temperature is 50-7.
It may rise to 0 ° C., which may reduce the fuel used in the predrying equipment.

However, since such a fermentation phenomenon is affected by the atmospheric temperature and other conditions, it is often difficult to ferment the material temporarily stored in the storage tank. It has been strongly desired to establish a method for increasing the temperature by fermenting the fermentation.

The present invention has been made in view of the above circumstances, and even when the temperature of the heat transfer surface of the preheating / drying apparatus or the thermal decomposition furnace is raised, the object to be treated introduced into the preheating / drying apparatus or the thermal decomposition furnace is not affected. Provided is a pyrolysis treatment system that can be softened and melted so that it does not adhere to the inner wall, and can significantly improve the heat transmission coefficient in the pyrolysis furnace to reduce the size of the pyrolysis furnace. Its main purpose is to:

[0018]

In order to achieve the above object, according to the present invention, there is provided a pyrolysis furnace for heating an object containing an organic substance to separate the object into a solid residue and a pyrolysis gas. And for the object to be charged into the pyrolysis furnace,
And a granular solid mixing device for mixing the granular solid continuously or intermittently.

According to a second aspect of the present invention, there is provided a pyrolysis furnace for heating an object containing an organic substance to separate the object into a solid residue and a pyrolysis gas; And a granular solid mixing device for mixing granular solids continuously or intermittently into an object to be processed put into the preliminary drying processing device.

According to a third aspect of the present invention, in the thermal decomposition treatment system according to any one of the first and second aspects, the granular solid mixing apparatus includes slaked lime powder, dry sludge,
Solid residue discharged from the pyrolysis furnace, solid residue having a certain size obtained from the solid residue, dust contained in the pyrolysis gas discharged from the pyrolysis furnace,
Alternatively, any one of iron lump collected from a solid residue discharged from the pyrolysis furnace is used.

According to a fourth aspect of the present invention, in the thermal decomposition treatment system according to any one of the first and second aspects, the centrifugal dewatering device for dewatering the sludge and the sludge dewatered by the centrifugal dewatering device are dried and obtained. And a centrifugal thin-film drying device for supplying the dried sludge to the pyrolysis furnace or the predrying device as a granular solid.

According to a fifth aspect of the present invention, in the thermal decomposition treatment system according to any one of the first and second aspects, the granular solid mixing device includes slaked lime powder, dry sludge,
Solid residue discharged from the pyrolysis furnace, solid residue having a certain size obtained from the solid residue, dust contained in the pyrolysis gas discharged from the pyrolysis furnace,
Alternatively, any one of iron lump collected from a solid residue discharged from the pyrolysis furnace is used.

According to a sixth aspect of the present invention, in the thermal decomposition processing system according to any one of the first to fifth aspects, heat is recovered from a solid residue or a pyrolysis gas discharged from the thermal decomposition furnace, and Alternatively, the method is characterized by returning to a predrying treatment apparatus.

According to a seventh aspect of the present invention, in the thermal decomposition system according to any one of the first to sixth aspects, the thermal decomposition furnace or the preliminary drying process is disposed in a stage preceding the thermal decomposition furnace or the preliminary drying device. A storage device is provided for adjusting the fermentation conditions of the object to be supplied to the apparatus and temporarily storing the object to be processed while fermenting the object to be processed.

According to an eighth aspect of the present invention, in the thermal decomposition processing system according to the seventh aspect, the storage device heats the object to be supplied to the thermal decomposition furnace or the predrying processing device to perform fermentation. It is characterized by promoting.

According to a ninth aspect of the present invention, in the thermal decomposition processing system according to the seventh aspect, the storage device temporarily uses heat recovered from a solid residue or a pyrolysis gas discharged from the pyrolysis furnace. It is characterized in that the stored object to be treated is heated to promote fermentation.

According to a tenth aspect of the present invention, in the thermal decomposition treatment system according to the seventh aspect, the storage device is configured to carry the aerobic bacteria group or the anaerobic bacteria group on the temporarily stored object to be treated. Is used to promote fermentation.

In the eleventh aspect, in the thermal decomposition treatment system according to the seventh aspect, when the storage device inputs the base material carrying the aerobic bacteria group to the temporarily stored object to be processed, When air or oxygen is taken in from the outside and supplied into the object to be treated, and when a substrate carrying an anaerobic bacteria group is charged, the inside of the storage tank is sealed, and the object to be treated is in an oxygen-free state. It is characterized in that.

According to a twelfth aspect of the present invention, in the thermal decomposition processing system according to any one of the first to eleventh aspects, even if a particulate solid is mixed in the object to be charged into the thermal decomposition furnace, When the characteristics of (1) are not improved, the type of granular solid to be mixed into the object is switched.

In claim 13, claims 1, 2, 5 to 1
2. In the pyrolysis treatment system according to any one of 2, the slaked lime thrower that throws slaked lime into the pyrolysis gas discharged from the pyrolysis furnace, and the slaked lime thrown by the slaked lime thrower into the pyrolysis gas. A solids collector for collecting the contained solids components, and returning the solids components collected by the solids collector to the granular solid mixing apparatus, and using the solids components as granular solids. Features.

According to a fourteenth aspect, in the thermal decomposition treatment system according to the thirteenth aspect, the solid residue transport path from the solid residue processing device provided at the outlet side of the pyrolysis furnace to the granular solid mixing device, or the thermal decomposition treatment system. A dust transport path from the solid collector to the particulate solid mixing device provided on the outlet side of the cracking furnace has a heat retaining structure.

In a fifteenth aspect, in the thermal decomposition treatment system according to any one of the first to fourteenth aspects, the particulate solid mixing apparatus is recovered from a solid residue or a pyrolysis gas discharged from the pyrolysis furnace. The method is characterized in that the granular solid is heated and then mixed with the object to be processed.

[0033] According to a sixteenth aspect, in the thermal decomposition processing system according to any one of the seventh to eleventh aspects, an object transfer path from the storage device to the thermal decomposition furnace has a heat retaining structure. .

According to the first aspect of the present invention, the temperature of the heat transfer surface of the pyrolysis furnace can be increased by mixing the solid to be processed into the pyrolysis furnace with the granular solid mixing device. Even when the thermal decomposition furnace is used, the object to be treated introduced into the thermal decomposition furnace is softened and melted so that it does not adhere to the inner wall, and the heat transmission coefficient in the thermal decomposition furnace is greatly improved, thereby improving the thermal decomposition furnace. Is reduced in size.

According to the second aspect of the present invention, the particulate solid is put into the predrying treatment device disposed in the preceding stage of the pyrolysis furnace by the particulate solid mixing device, and is mixed with the object to be treated in the predrying treatment device. , A preheating drying apparatus is arranged in front of the pyrolysis furnace, and the heat transfer surface temperature of the preheating drying apparatus is
Even when the temperature of the heat transfer surface of the pyrolysis furnace is raised, the object put into the preheating drying treatment apparatus and the pyrolysis furnace softens,
The thermal decomposition furnace is reduced in size while melting and preventing it from adhering to the inner wall, and greatly improving the heat transmission coefficient in the thermal decomposition furnace.

According to a third aspect of the present invention, the sludge is dried by the centrifugal thin film drying device, and the obtained dried sludge is used as a granular solid. Even when the heating surface temperature and the heat transfer surface temperature of the pyrolysis furnace are raised, the object put into the pyrolysis furnace is softened and melted so that it does not adhere to the inner wall. The heat transfer coefficient inside is greatly improved, and the thermal decomposition furnace is downsized.

According to a fourth aspect, a centrifugal dewatering device for dewatering the sludge and a centrifugal thin film drying device for drying the sludge dewatered by the centrifugal dewatering device are used, and the dried sludge obtained by the centrifugal thin film drying device is used. By using it as a granular solid, even when the water content of the sludge is high, even when the heat transfer surface temperature of the preheating drying treatment device and the heat transfer surface temperature of the pyrolysis furnace are increased while performing the sludge treatment. The object to be treated, which is put into the pyrolysis furnace, is softened and melted so that it does not adhere to the inner walls, and the heat transfer coefficient in the pyrolysis furnace is greatly improved, making the pyrolysis furnace smaller. Let it.

In claim 5, the granular solid used in the granular solid mixing apparatus has slaked lime powder, dried sludge, solid residue discharged from the pyrolysis furnace, and a certain size obtained from the solid residue. Preheating by using any of solid residue, dust contained in pyrolysis gas discharged from the pyrolysis furnace, or iron lump collected from the solid residue discharged from the pyrolysis furnace, Even when the temperature of the heat transfer surface of the drying equipment and the pyrolysis furnace and the temperature of the heat transfer surface of the pyrolysis furnace are increased, the workpieces placed in the preheating drying equipment and the pyrolysis furnace are softened and melted. Thus, the thermal decomposition furnace is prevented from adhering to the inner wall and generating chlorine gas, and the heat transmission coefficient in the thermal decomposition furnace is greatly improved, thereby reducing the size of the thermal decomposition furnace.

According to the present invention, the heat is recovered from the solid residue or the pyrolysis gas discharged from the pyrolysis furnace and returned to the pyrolysis furnace or the predrying apparatus. The heat used is efficiently collected and returned to the pre-drying device, etc., thereby greatly improving the thermal efficiency of the entire system and greatly reducing the operating cost while maintaining the heat transfer surface temperature of the pre-heat drying device. Even when the temperature of the heat transfer surface of the pyrolysis furnace is increased, the object to be treated put in the preheating drying treatment apparatus and the pyrolysis furnace is softened and melted so that it does not adhere to the inner wall. The heat transfer coefficient in the cracking furnace is greatly improved, and the size of the cracking furnace is reduced.

According to a seventh aspect of the present invention, a storage device for temporarily storing an object to be supplied to the pyrolysis furnace or the predrying apparatus is disposed at a stage preceding the pyrolysis furnace or the predrying apparatus.
By controlling this storage device, adjusting the fermentation conditions and fermenting the temporarily stored processed material, the processed material stored in the storage tank is reliably fermented and used in the preliminary drying device. The heat transfer surface temperature of the preheating drying treatment equipment and the heat transfer surface temperature of the pyrolysis furnace are increased while significantly reducing the amount of heat required, thereby greatly improving the thermal efficiency of the entire system and greatly reducing the operating cost. Even when you let me
The object put into the pyrolysis furnace, etc. is softened and melted so that it does not adhere to the inner walls, and the heat transfer coefficient in the pyrolysis furnace is greatly improved, thereby reducing the size of the pyrolysis furnace. .

In the eighth aspect, the temperature of the storage tank is optimized by heating the object to be supplied to the pyrolysis furnace or the predrying apparatus by the storage apparatus to promote fermentation. The fermentation of the material stored in the storage tank is ensured, which significantly reduces the amount of heat used in the pre-drying device, and significantly improves the thermal efficiency of the entire system, thereby significantly reducing operating costs. Even when the heat transfer surface temperature of the preheating drying treatment device and the heat transfer surface temperature of the pyrolysis furnace are raised, the object to be processed, which is put into the pyrolysis furnace, is softened and melted, and adheres to the inner wall. In addition, the heat transfer coefficient in the pyrolysis furnace is greatly improved, and the size of the pyrolysis furnace is reduced.

According to the ninth aspect, the storage device is used to heat the temporarily stored object to be processed by using the heat recovered from the solid residue or the pyrolysis gas discharged from the pyrolysis furnace to promote fermentation. By recovering the heat used in the pre-drying treatment device or the pyrolysis furnace, the material to be treated stored in the storage tank is fermented reliably, thereby greatly increasing the amount of heat used in the pre-drying device. When the heat transfer surface temperature of the preheating drying treatment device and the heat transfer surface temperature of the pyrolysis furnace are increased while significantly reducing the operating efficiency by greatly improving the thermal efficiency of the entire system, The object put into the pyrolysis furnace, etc. is softened and melted so that it does not adhere to the inner walls, and the heat transfer coefficient in the pyrolysis furnace is greatly improved, thereby reducing the size of the pyrolysis furnace. .

According to a tenth aspect of the present invention, a storage device is provided with a substrate supporting an aerobic group or an anaerobic group to a temporarily stored object to be processed to promote fermentation. The fermentation of the material stored in the pre-drying equipment reduces the amount of heat used in the pre-drying device, improves the thermal efficiency of the entire system, and significantly reduces operating costs. Even when the heat transfer surface temperature of the preheating drying treatment device and the heat transfer surface temperature of the pyrolysis furnace are raised, the object to be processed put into the pyrolysis furnace is softened and melted so that it does not adhere to the inner wall. At the same time, the heat transfer coefficient in the pyrolysis furnace is greatly improved, and the size of the pyrolysis furnace is reduced.

According to the eleventh aspect, when the substrate carrying the aerobic bacteria group is introduced into the temporarily stored object to be treated by the storage device, air or oxygen is taken in from the outside, and When the substrate carrying the anaerobic bacteria group is charged into the storage tank, the storage tank is sealed, and the object to be treated is made oxygen-free, so that the aerobic input into the storage tank is performed. In accordance with the bacterial group or anaerobic bacterial group, the environment in the storage tank is adjusted, and thereby the fermentation of the object stored in the storage tank is ensured,
While significantly reducing the amount of heat used in the pre-drying unit, greatly improving the thermal efficiency of the entire system and greatly reducing operating costs, the heat transfer surface temperature of the pre-heating drying unit and the transfer of the pyrolysis furnace Even when the temperature of the hot surface is raised, the material to be treated put in the pyrolysis furnace, etc. is softened and melted so that it does not adhere to the inner walls, and the heat transfer coefficient in the pyrolysis furnace is greatly improved. Then, the pyrolysis furnace is downsized.

According to the twelfth aspect, when the characteristics of the object to be treated are not improved even if the particles are mixed into the object to be introduced into the pyrolysis furnace, the type of the solid to be mixed into the object is switched. By selecting the most suitable granular solids according to the state of the pyrolysis furnace, even when the heat transfer surface temperature of the preheating drying treatment equipment and the heat transfer surface temperature of the pyrolysis furnace are increased, The material to be treated softened and melted,
In addition to preventing the heat from adhering to the inner wall, the heat transfer coefficient in the pyrolysis furnace is greatly improved, and the pyrolysis furnace is reduced in size.

According to a thirteenth aspect of the present invention, slaked lime dosing device for charging slaked lime into the pyrolysis gas discharged from the pyrolysis furnace, and solid matter contained in the pyrolytic gas into which slaked lime is charged by the slaked lime dosing device A solids collector for collecting the components is provided, and the solids components collected by the solids collector are returned to the granular solid mixing device and used as granular solids, thereby discharging the solids from the pyrolysis furnace. The slaked lime absorbs the chlorine component contained in the pyrolysis gas that has been absorbed into the slaked lime, greatly reducing the chlorine component concentration in the exhaust gas. Even when the temperature of the heat transfer surface of the pyrolysis furnace is raised, the object to be treated put in the pyrolysis furnace, etc. is softened and melted so that it does not adhere to the inner wall or generate chlorine gas. ,
The heat transfer coefficient in the pyrolysis furnace is greatly improved, and the size of the pyrolysis furnace is reduced.

According to a fourteenth aspect, a solid residue conveying path from the solid residue processing device provided on the outlet side of the pyrolysis furnace to the particulate solid mixing device, or a solid matter collector provided on the outlet side of the pyrolysis furnace has a granular form. By making the dust transfer path to the solid mixing device a heat retaining structure, the solid residue itself discharged from the pyrolysis furnace and the heat contained in this solid residue or the pyrolysis gas discharged from the pyrolysis furnace are included. Effective use of the dust itself and the heat contained in this dust, thereby greatly improving the resource efficiency and thermal efficiency of the entire system and greatly reducing the operating cost, while reducing the heat transfer of the preheating drying treatment equipment Even when the surface temperature and the heat transfer surface temperature of the pyrolysis furnace are raised, the object to be treated put in the pyrolysis furnace and the like is softened and melted so as not to adhere to the inner wall, The heat transmission coefficient of the decomposition furnace greatly improved, thereby downsizing the pyrolysis furnace.

According to the fifteenth aspect, the particulate solid is heated by using the solid residue discharged from the pyrolysis furnace or the heat recovered from the pyrolysis gas by the particulate solid mixing device, and then mixed with the object to be treated. In this way, the heat contained in the solid residue discharged from the pyrolysis furnace or the heat contained in the pyrolysis gas discharged from the pyrolysis furnace is not wasted, and the predrying treatment device or heat is not wasted. When the heat transfer surface temperature of the preheating drying treatment equipment and the heat transfer surface temperature of the pyrolysis furnace are increased while returning to the cracking furnace, thereby greatly improving the thermal efficiency of the entire system and greatly reducing the operating cost However, the object to be treated put in the pyrolysis furnace, etc. is softened and melted so that it does not adhere to the inner walls, and the heat transfer coefficient in the pyrolysis furnace is greatly improved, making the pyrolysis furnace compact. To

In the sixteenth aspect, the heat transfer structure of the object stored in the storage device is effectively used by making the object transfer path from the storage device to the thermal decomposition furnace have a heat-retaining structure. Even when the heat transfer surface temperature of the preheating drying treatment equipment and the heat transfer surface temperature of the pyrolysis furnace are increased, the heat efficiency is greatly improved while the operating cost is greatly reduced. The object to be processed softens and melts,
In addition to preventing the heat from adhering to the inner wall, the heat transfer coefficient in the pyrolysis furnace is greatly improved, and the pyrolysis furnace is reduced in size.

[0050]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 is a block diagram showing a first embodiment of a thermal decomposition processing system according to the present invention.

The thermal decomposition processing system 1a shown in FIG.
A crushing device 3 for crushing the to-be-processed material 2 such as garbage collected from each household or each business establishment, a storage device 4 for temporarily storing the to-be-processed material 2 crushed by the crushing device 3, and a slaked lime A granular solid storage device 6 that stores granular solids 5 such as powdered sludge or dried sludge having a water content of 30 to 55%, and a granular solid 5 and a storage device 4 that are stored in the granular solid storage device 6 A pre-drying treatment device 7 for heating and drying the stored object 2 while mixing the object 2;
A thermal decomposition furnace 8 having a partition type heat transfer structure for thermally decomposing the object 2 dried by the preliminary drying apparatus 7 to separate it into a solid residue 9 and a pyrolysis gas 10, Reforming gas or pyrolysis gas 10 discharged from
A pyrolysis treatment device 12 having a gas reformer 11 for performing the next combustion treatment, etc., and a solid residue 9 discharged from the pyrolysis treatment device 12 are taken in, temporarily stored, and then stored in a subsequent melting furnace or the like. It comprises a char processing device 13 for supplying, and an exhaust heat recovery device 14 for recovering heat of the pyrolysis gas 10 discharged from the pyrolysis device 12 and supplying the reduced pyrolysis gas 10 to an exhaust gas treatment facility. ing. The dry sludge used as the granular solid preferably has a water content of 30 to 55% as described above. This is because, within this range, granular sludge having no stickiness is easily handled. When the water content is about 85%, the slurry is in the form of a slurry. On the other hand, when the water content is 30% or less, it becomes powdery and difficult to handle, and is not suitable for practical use.

In the above configuration, when the object 2 such as garbage collected from each household or each office is supplied to the thermal decomposition processing system 1a, the object 2 is crushed by the crushing device 3. After this is temporarily stored in the storage device 4, it is supplied to the preliminary drying device 7 and dried while being mixed with the granular solid 5 supplied from the granular solid storage device 6. The processed object 2 after the completion of the mixing and drying process is led to the thermal decomposition furnace 8 and subjected to the thermal decomposition process.

At this time, due to the action of the granular solids 5 mixed into the object 2, the heat transmission coefficient of the object 2 is increased, and the plastics contained in the object 2 are softened and melted. However, even if this is covered with the particulate solid 5 and the softened and melted plastics adhere to the inner wall of the pyrolysis furnace 8, the plastic is shaved off by the granular solid 5 and adheres to the inner wall of the pyrolysis furnace 8. Is prevented.

The solid residue 8 discharged from the pyrolysis furnace 8 is temporarily stored in the char processing device 13, guided to a melting furnace, further heated, and vitrified.

In parallel with this operation, the pyrolysis gas 10 discharged from the pyrolysis furnace 8 is led to the gas reformer 11, where the reforming process or the secondary combustion process is performed.
After being guided to the exhaust heat recovery device 14 and recovering the heat contained in the pyrolysis gas 10, the heat is supplied to an exhaust gas treatment facility and rendered harmless.

Further, water (hot water) warmed by the heat recovered from the pyrolysis gas 10 is supplied to a hot water supply facility or the like.

As described above, in this embodiment, the pre-drying processing device 7 mixes the workpiece 2 supplied from the storage device 4 and the granular solid 5 supplied from the granular solid storage device 6 while mixing. After being dried, it is guided to the thermal decomposition furnace 8 to be subjected to thermal decomposition processing. Therefore, even when the heat transfer surface temperature of the thermal decomposition furnace 8 is increased, the processing The object 2 can be prevented from softening and melting and from adhering to the inner wall. In addition, the heat transmission coefficient in the thermal decomposition furnace 8 can be greatly improved, and the size of the thermal decomposition furnace 8 can be reduced.

Further, in this embodiment, the object 2 and the particulate solid 5 are heated while being mixed and dried by the preheating and drying treatment device 7 disposed in the preceding stage of the thermal decomposition furnace 8. Therefore, not only the temperature of the heat transfer surface of the thermal decomposition furnace 8 but also the temperature of the heat transfer surface of the preheat drying treatment device 7 can be increased, whereby the size of the preheat drying treatment device 7 can be reduced.

Further, in this embodiment, when slaked lime is used as the particulate solid 5, chlorine generated when the vinyl chloride or the like contained in the object to be treated is decomposed in the pyrolysis furnace 8 and slaked lime And the chlorine component can be adsorbed, whereby the chlorine concentration in the pyrolysis gas 10 can be greatly reduced.

In this embodiment, since the dried sludge having a water content of 30 to 55% can be used as the granular solid 5, the sludge itself discharged from a sewage treatment plant or the like is treated while predrying. The processing target 2 can be prevented from adhering in the processing apparatus 7 and the thermal decomposition processing apparatus 12.

[Second Embodiment] FIG. 2 is a block diagram showing a second embodiment of the thermal decomposition system according to the present invention. In this figure, the same parts as those in FIG. 1 are denoted by the same reference numerals.

The difference between the pyrolysis system 1b shown in this figure and the pyrolysis system 1a shown in FIG. 1 is that the granular solid storage device 6 is removed and the char processing device 13b is removed.
A part of the solid residue 9 temporarily stored is returned to the preliminary drying treatment device 7 and is dried while being mixed with the article 2 to be treated.

Thus, in this embodiment, slaked lime,
Since the solid residue 9 having the same function as that of the dried sludge is mixed with the object 2 to be subjected to the preliminary drying treatment and the thermal decomposition treatment, the post treatment of the solid residue 9 can be reduced. . Further, similarly to the embodiment shown in FIG. 1, the thermal decomposition furnace 8 of the thermal decomposition processing apparatus 12 in the preliminary drying processing apparatus 7.
It is possible to increase the heat transmission coefficient of the article 2 to be treated and to increase the temperature of the heat transfer surface, to further reduce the size of the predrying processing device 7 and the pyrolysis furnace 8 and to perform the predrying. In the processing apparatus 7 and the pyrolysis furnace 8, it is possible to prevent the workpiece 2 from adhering to the inner wall and to prevent the heat transfer surface from being stained and the predrying processing apparatus 7 and the pyrolysis furnace 8 from being blocked. it can.

Further, in this embodiment, since the granular solid storage device 6 is not required, the cost for constructing the system can be reduced as compared with the thermal decomposition processing system 1a shown in FIG. Operating costs can be reduced.

[Third Embodiment] FIG. 3 is a block diagram showing a third embodiment of the thermal decomposition processing system according to the present invention. In this figure, the same parts as those in FIG. 2 are denoted by the same reference numerals.

The difference between the thermal decomposition system 1c shown in this figure and the thermal decomposition system 1b shown in FIG. 2 is that the water (hot water) heated by the heat recovered by the exhaust heat recovery unit 14 is subjected to a preliminary drying process. The pre-drying processing device 7
The object 2 (object to be treated mixed with the solid residue 9) is heated and dried.

As described above, in this embodiment, the heat recovered by the exhaust heat recovery device 14 can be used as a heat source of the predrying processing device 7, thereby greatly improving the energy efficiency of the entire system. Operating costs can be significantly reduced.

[Fourth Embodiment] FIG. 4 is a block diagram showing a fourth embodiment of the thermal decomposition system according to the present invention. In this figure, the same parts as those in FIG. 3 are denoted by the same reference numerals.

The difference between the pyrolysis system 1d shown in this figure and the pyrolysis system 1c shown in FIG. 3 is that a storage device 15 having a function of introducing aerobic bacteria and a heating function is used instead of the storage device 4. At the same time, the hot water discharged from the preliminary drying treatment device 7 is guided to the storage device 15, and the temperature of the treatment target 2 stored in the storage device 15 is increased to the fermentation temperature, and is included in the treatment target 2. This is to ensure that the organic matter is fermented.

In this case, as shown in FIG. 5, the storage device 15 has a cylindrical storage tank 16 for temporarily storing the processing object 2, and is disposed in the storage tank 16. A plurality of agitating blades 17 for agitating the loaded workpiece 2; and a screw discharger disposed at the bottom of the storage tank 16 for supplying the workpiece 2 in the storage tank 16 to the preliminary drying processing device 7. 18 is provided. Pressurized air is supplied from a blower (not shown) to the tank bottom where the screw discharger 18 is provided.

The storage device 15 is used to store the storage tank 1
A duct 20 that is disposed so as to cover an opening 19 formed at the upper part of the storage tank 16 and that expels air in the storage tank 16 by wind pressure obtained by the blower;
0 to be treated, which is disposed in the crushing device 3
And a conveyor 21 which is fed into the storage tank 16 through the opening 19 and is attached to the upper portion of the storage tank 16 and the object 2 in the storage tank 16 is coated with aerobic bacteria. The storage tank 16 is configured by a charging device 23 for charging the aerial bacteria-carrying substrate 22, a pipe wound around the side surface of the storage tank 16, and the like. 16
Heating plate mechanism 2 for heating the workpiece 2 placed in the inside
4 is provided.

In the above configuration, the workpiece 2 discharged from the crusher 3 is taken in by the conveyor 21,
After being conveyed and charged into the storage tank 16, the aerobic bacteria group-carrying substrate 22 is mixed into the article 2 stored in the storage tank 16 by the charging device 23, and each stirring blade By 17, the object 2 stored in the storage tank 16 is stirred.

In parallel with this operation, the hot water discharged from the pre-drying processing device 7 is guided to the pipe of the heating plate mechanism 24, and the material to be processed 2 stored in the storage tank 16 is suitable for fermentation. Using the wind pressure from the blower while maintaining the temperature, the outside air → the screw discharger 18 → the inner bottom of the storage tank 16 → the workpiece 2 in the storage tank 16 → the storage tank 1
6, air is taken in from the outside of the storage tank 16 and supplied to the processing object 2 stored in the storage tank 16 through a route of an opening 19 → a duct 20 → a blower → a deodorizing device (not shown). , To promote the fermentation of the article 2 to be treated.

Thereafter, at the time when the temperature of the object 2 is raised to a predetermined temperature by fermentation, the screw mechanism 18 is operated, the object 2 is taken out from the bottom of the storage tank 16 and the predrying device 7 is operated. To supply.

As described above, in this embodiment, the aerobic bacteria base material 22 is mixed into the article 2 to be processed, which is put into the storage tank 16 of the storage apparatus 15, and is discharged from the preliminary drying apparatus 7. The hot water is guided to the storage device 15 to raise the temperature of the article 2 in the storage tank 16 to a temperature suitable for fermentation. Therefore, the organic matter in the processing target 2 stored in the storage tank 16 can be fermented without fail, and the temperature of the processing target 2 can be increased. Decomposition equipment 1
2, the heat load can be reduced, and the energy efficiency of the entire system can be improved.

In this embodiment, the storage tank 16
Since the hot water discharged from the preliminary drying processing device 7 is used as a heat source for adjusting the temperature of the article 2 to be processed into the optimum temperature for the aerobic bacteria, the thermal efficiency of the entire system is greatly reduced. It is possible to improve the operating cost significantly.

Further, in this embodiment, the storage tank 1
Since the aerobic bacteria group-carrying base material 22 is introduced into the container 6, the aerobic bacteria are introduced into the storage tank 16 even when there is almost no aerobic bacteria in the processing object 2 supplied from the crushing device 3. The to-be-processed material 2 can be fermented reliably.

Further, in this embodiment, the blower is driven to remove air outside the storage tank 16 from the storage tank 16.
And the aerobic bacterium group-carrying base material 22 is mixed therein to supply sufficient oxygen to the article 2 to be treated, so that fermentation by aerobic bacteria is promoted and the temperature of the article 2 to be treated is reduced. The workpiece 2 can be raised quickly, thereby enabling continuous processing of the workpiece 2 and shortening the time required for processing the workpiece 2.

In this embodiment, the storage tank 16
The aerobic bacteria group-carrying base material 22 is mixed into the to-be-processed substance 2 to promote the fermentation of the to-be-processed substance 2.
Instead of such an aerobic bacteria group-carrying substrate 22, a anaerobic bacteria group-carrying substrate may be mixed.

Even in this case, the storage tank 16 is sealed and the environment inside the storage tank 16 is set to an environment suitable for the propagation of anaerobic bacteria. In the meantime, the article 2 to be treated
And the temperature of the article to be treated 2 can be quickly raised.

[Fifth Embodiment] FIG. 6 is a block diagram showing a fifth embodiment of the thermal decomposition processing system according to the present invention. In this figure, the same parts as those in FIG. 4 are denoted by the same reference numerals.

The pyrolysis system 1e shown in this figure is different from the pyrolysis system 1d shown in FIG. 4 in that a line for returning the solid residue 9 stored in the char processing unit 13 to the preliminary drying processing unit 7 is replaced with a line. And a centrifugal thin-film drying device 25 for converting sludge supplied from a sewage treatment plant (not shown) into dry sludge.
The hot water obtained in 4 is supplied to the centrifugal thin film drying device 25,
The sludge is dried, and the resulting dried sludge is supplied to the preliminary drying treatment device 7 to be mixed with the article 2 to be treated.

In this case, the centrifugal thin film drying device 25 is
As shown in FIG.
A main shaft 27 arranged concentrically with the heat transfer cylinder 26, an upper bearing mechanism 28 fixed to the upper portion of the heat transfer cylinder 26 and rotatably supporting the upper side of the main shaft 27, 2
6, a lower bearing mechanism 29 rotatably supporting the lower portion of the main shaft 27, a pulley 30 fixed to the upper portion of the main shaft 27, and a rotary shaft 3 fixed to the outside of the heat transfer drum 26.
Drive motor 31 for rotating pulley 33 fixed to 2
And a V-belt 34 stretched between the pulleys 30 and 33 to transmit the rotation of the pulley 33 to the pulley 30, and a sludge input pipe 35 fixed to the upper side of the main shaft 37 and connected to the upper part of the heat transfer cylinder 26. A distribution ring 36 for uniformly dispersing the sludge introduced into the heat transfer cylinder 26 through the inner wall of the heat transfer cylinder 26
8, a plurality of hinge mechanisms 37 attached to the main shaft 27 at predetermined intervals, and are movably supported by the hinge mechanisms 37 as shown in FIG. 8, and rotate while rotating with the main shaft 37. The plurality of blades 38 that move the sludge dispersed by the distribution ring 36 to the lower side of the heat transfer cylinder 26 while pressing the sludge dispersed by the distribution ring 36 against the inner wall of the heat transfer cylinder 26, and surround the outside of the heat transfer cylinder 26. And a steam jacket mechanism 3 for taking in hot water supplied from the exhaust heat recovery device 14 and heating the heat transfer cylinder 26.
9, an exhaust pipe 40 attached to the upper part of the heat transfer cylinder 26, taking in steam from sludge introduced into the heat transfer cylinder 26, and supplying it to a deodorizer (not shown);
6, a dry sludge supply pipe 41 for taking in dry sludge discharged from the lower part of the heat transfer drum 26 and supplying the dried sludge to the preliminary drying treatment device 7.

Then, the driving force obtained by the driving motor 31 is applied to the rotating shaft 32 of the driving motor 31 → the pulley 33 → V
In the route of the belt 34 → the pulley 30 → the main shaft 27, the main shaft 2
7 and the blades 38 connected to the main shaft 27 are rotated together with the main shaft 27, and the hot water supplied from the exhaust heat recovery device 14 is guided to the steam jacket mechanism 39, and the heat transfer cylinder 26 is transferred from the outside. Let it heat.

In this state, the sludge discharged from the sewage treatment plant is transferred to the dispersion ring 3 through the sewage treatment plant → sludge input pipe 35 → inside the heat transfer cylinder 26 → distribution ring 36.
6 to uniformly disperse the sludge on the inner wall of the heat transfer cylinder 26, and while moving the sludge to the lower side of the heat transfer cylinder 26 by its own weight, each of the blades 38 driven to rotate. As a result, the sludge moving downward is pressed against the inner wall of the heat transfer cylinder 26 heated by hot water, and the moisture in the sludge is evaporated, thereby producing dried sludge.

Then, the dried sludge is taken out from the lower part of the heat transfer cylinder 26, and the dried sludge supply pipe 41 →
The pre-drying treatment device 7 is supplied to the pre-drying treatment device 7 through a route of the pre-drying treatment device 7 and mixed with the workpiece 2.

As described above, in this embodiment, the dried sludge obtained by drying the sludge is supplied to the preliminary drying treatment device 7 and mixed with the article 2 to be treated discharged from the storage device 15. 4 is dried so that FIG.
In the same manner as in the embodiment shown in FIG. 1, the heat transfer coefficient of the workpiece 2 placed in the pre-drying processing apparatus 7 and the pyrolysis furnace 8 of the pyrolysis processing apparatus 12 is increased to increase the heat transfer surface temperature. be able to. As a result, the preliminary drying apparatus 7, the pyrolysis furnace 8
In the predrying device 7 and the pyrolysis furnace 8, the object 2 can be prevented from adhering to the inner wall, and the heat transfer surface can be stained, the predrying device 7, Blockage of the furnace 8 can be prevented.

Further, in this embodiment, since the granular solid storage device 6 is not required, the cost for constructing the system can be reduced as compared with the thermal decomposition processing system 1a shown in FIG. Operating costs can also be reduced.

In this embodiment, the treatment of the dried sludge obtained by the centrifugal thin film drying apparatus 25 and the treatment of the object to be treated 2 can be performed at the same time, so that the drying sludge treatment is not required. The system can be simplified by that much.

[Sixth Embodiment] FIG. 9 is a block diagram showing a third embodiment of the thermal decomposition processing system according to the present invention. In this figure, the same parts as those in FIG. 6 are denoted by the same reference numerals.

The thermal decomposition system 1f shown in this figure is different from the thermal decomposition system 1e shown in FIG. 6 in that a centrifugal dewatering device 42 such as a decanter is arranged in front of the centrifugal thin film drying device 25. Utilizing the device 42, the sludge supplied from the sewage treatment plant, for example, the sludge containing 99% of moisture is dehydrated into sludge containing approximately 85% of moisture, and then supplied to the centrifugal thin film drying device 25. The moisture content of the dried sludge discharged from the thin film drying device 25 is 55
That is, it is set to be about 30%.

As described above, in this embodiment, the sludge supplied from the sewage treatment plant is dewatered by the centrifugal dewatering device 42 disposed in front of the centrifugal thin film drying device 25 and then supplied to the centrifugal thin film drying device 25. Therefore, sludge containing a large amount of water, such as sewage sludge discharged from a sewage treatment plant, is treated in the pre-drying treatment device 7 and the pyrolysis treatment device 12.
By increasing the heat transmission coefficient of the article 2 to be treated, which is put into the thermal decomposition furnace 8, it is possible to increase the heat transfer surface temperature, thereby reducing the size of the preliminary drying apparatus 7 and the thermal decomposition furnace 8. In the predrying apparatus 7 and the pyrolysis furnace 8 to prevent the object 2 from adhering to the inner wall,
It is possible to prevent contamination of the heat transfer surface and blockage of the preliminary drying treatment device 7 and the thermal decomposition furnace 8.

[Other Embodiments] In the above embodiment,
A predetermined granular solid 5 such as slaked lime powder, sludge, solid residue 9 and dried sludge is continuously supplied to the pre-drying treatment device 7 to be mixed with the article 2 to be treated. A dirt detection sensor is provided in the drying processing device 7, and when the object 2 adheres to the inner wall of the preliminary drying processing device 7 and the heat transfer surface becomes dirty and the drying processing capability is reduced, the dirt detection sensor detects this. Then, the granular solid may be supplied and intermittently mixed with the processed material 2. Or,
When a decrease in the drying capacity is detected by the dirt detection sensor, small iron balls, gravel, and the like having a larger particle size and specific gravity than the granular solid 5 are introduced into the preliminary drying processing device 7, and the adherence to the heat transfer surface is reduced. The processing object 2, dirt, and the like may be removed.

As a result, the drying capacity of the preliminary drying apparatus 7 is stabilized, and the thermal decomposition of the article 2 is stabilized.
And it can be performed continuously.

In the above-described embodiment, slaked lime powder, sludge, solid residue 9, dry sludge, and the like are used as the granular solids 5 to be supplied to the predrying processing apparatus 7. The pyrolysis gas 1 collected by a bag filter provided after the pyrolysis furnace 8, the gas reformer 11, or the exhaust heat recovery device 14.
The dust (bag dust) in the medium 0 may be returned to the preliminary drying processing device 7 and mixed with the workpiece 2.

Thus, as compared with the case where the solid residue 9 stored in the char treatment device 13 is used, the size of the particles mixed into the object
Can stabilize the heat transfer characteristics and the like, and can prevent impurities from being mixed.

In the above-described embodiment, when the solid residue 9 stored in the char processing apparatus 13 is returned to the preliminary drying processing apparatus 7 and mixed with the workpiece 2, the solid residue 9 is stored in the char processing apparatus 13. The solid residue 9 is used as it is, but a sieve (mesh filter) is provided at the bottom of the cylinder of the char discharge screw mechanism arranged at the bottom of the char processing device 13, and the sieve has a certain size. Select small solid residue 9,
This may be returned to the pre-drying processing device 7 and mixed with the workpiece 2.

[0098] Even in this case, the size of the particles to be mixed into the processing object 2 is kept constant, compared with the case where the solid residue 9 stored in the char processing apparatus 13 is used as it is, and It is possible to stabilize the heat transfer characteristics and the like of the processing object 2 and prevent impurities from being mixed.

Further, in the above-described embodiment, the pre-drying processing device 7 is provided with the dirt detection sensor, and the workpiece 2 adheres to the inner wall of the pre-drying processing device 7 so that the heat transfer surface becomes dirty and the thermal decomposition process is performed. When the capacity is reduced, this is detected by a dirt detection sensor, and small iron balls, gravel, etc., having a larger particle size and specific gravity than the granular solid, are put into the predrying processing device 7, and the adherence to the heat transfer surface is reduced. Processed materials, dirt, etc. are removed, but a sieve (mesh filter) is provided at the solid residue discharge port of the pyrolysis furnace 8 so that a solid residue 9 having a predetermined size or more, for example, iron balls, wood chips, etc., is removed. When the dirt is detected on the heat transfer surface by the dirt detecting sensor, the iron balls, the pieces of wood, and the like that have been previously extracted may be returned to the preliminary drying processing device 7 using a sieve.

Thus, even if small iron balls, gravel and the like are not separately prepared, the workpiece 2 adheres to the inner wall of the pre-drying processing device 7, the heat transfer surface becomes dirty, and the thermal decomposition processing capacity is reduced. When the temperature is lowered, the processing target 2 adhered to the inner wall of the preliminary drying processing device 7 can be removed.

Further, in the above-described embodiment, the pre-drying processing device 7 is provided with a dirt detection sensor, and the processing object 2 adheres to the inner wall of the pre-drying processing device 7 so that the heat transfer surface is contaminated. When the capacity is reduced, this is detected by a dirt detection sensor, and small iron balls, gravel, etc., having a larger particle size and specific gravity than the granular solid, are put into the predrying processing device 7, and the adherence to the heat transfer surface is reduced. An electromagnet is provided at the solid residue discharge port of the pyrolysis furnace 8 to remove iron balls and the like from the solid residue 9 discharged from the pyrolysis furnace 8. When dirt is detected on the heat transfer surface by the detection sensor, an iron ball or the like that has been taken out in advance may be returned to the preliminary drying apparatus 7.

Thus, even when iron is not contained in the object 2, the object 2 adheres to the inner wall of the preliminary drying apparatus 7, the heat transfer surface becomes dirty, and the thermal decomposition capacity is reduced. When the temperature decreases, the object 2 adhered to the inner wall of the preliminary drying apparatus 7 can be removed by using the iron ball included in the object 2 up to the previous time.

Further, in the above-described embodiment, predetermined granular solids 5 such as slaked lime powder, sludge, solid residue 9 and dried sludge are supplied to the predrying treatment apparatus 7 and mixed with the article 2 to be treated. A dry scrubber for introducing slaked lime is provided at the pyrolysis gas outlet of the pyrolysis furnace 8, the pyrolysis gas outlet of the gas reformer 11, or the pyrolysis gas outlet of the exhaust heat recovery unit 14. After the dry scrubber, a bag filter for recovering slaked lime or calcium chloride obtained by reacting slaked lime with hydrogen chloride is provided, slaked lime collected by the bag filter,
Calcium chloride or the like may be returned to the predrying processing device 7 and mixed with the workpiece 2.

By doing so, it is possible to almost completely remove hydrogen chloride and the like from the pyrolysis gas 10 discharged from the exhaust heat recovery unit 14, further improve the utilization efficiency of slaked lime, and reduce the operating cost. Can be lowered.

Further, in the above-described embodiment, the solid residue 9 stored in the char processing apparatus 13 or the bag dust collected by the bag filter is returned to the preliminary drying processing apparatus 7 using a conveyor or a conveying pipe. However, these conveyors and transport pipes are made to have a heat retaining structure,
The solid residue 9 stored in the char treatment device 13 and the bag dust collected by the bag filter may be returned to the preliminary drying treatment device 7 without decreasing the temperature.

By doing so, the temperature of the solid residue 9 stored in the char processing device 13 and the temperature of the bag dust collected by the bag filter are returned to the predrying device 7 without decreasing the temperature, and It can be mixed with the processing object 2, thereby improving the thermal efficiency of the entire system and reducing the operating cost.

Further, in the above-described embodiment, the slaked lime powder, sludge, iron balls, and the like are not heated but are charged into the predrying treatment device 7.
After recovering the heat of the solid residue 9 or the pyrolysis gas 10 discharged from the furnace and heating the slaked lime powder, sludge, iron balls, and the like to be supplied to the preliminary drying apparatus 7, the preliminary drying apparatus 7
It may be made to throw in.

In this way, even if slaked lime powder, sludge, iron balls, and the like are supplied to the preliminary drying treatment device 7,
It is possible to prevent the temperature of the processing object 2 supplied to the predrying processing device 7 from lowering, thereby improving the thermal efficiency of the entire system and reducing the operating cost.

Further, in the above-described embodiment, the workpiece 2 discharged from the storage device 4 is transported to the preliminary drying processing device 7 by a conveyor, a transport path such as a transport pipe, and the workpiece discharged from the preliminary drying processing device 7. A normal conveyor, a transfer pipe, and the like are used as a transfer path, such as a conveyor, a transfer pipe, and the like for transferring the processing object 2 to the thermal decomposition treatment apparatus 12. Using the conveyor and the transport pipe that have been used, the processing object 2 discharged from the storage device 4 is charged into the preliminary drying processing device 7 while maintaining the temperature of the processing object 2, and the processing target discharged from the preliminary drying processing device 7 The product 2 may be charged into the thermal decomposition treatment device 12 while maintaining the temperature of the product 2.

In this manner, the heat load of the preliminary drying device 7 and the heat load of the thermal decomposition device 12 can be further reduced, the thermal efficiency of the entire system can be improved, and the operating cost can be reduced.

[0111]

As described above, in the thermal decomposition processing system according to the first aspect, even when the temperature of the heat transfer surface of the thermal decomposition furnace is increased, the material to be treated introduced into the thermal decomposition furnace is softened and melted. As a result, it is possible to prevent the heat from adhering to the inner wall, and to greatly improve the heat transmission coefficient in the pyrolysis furnace, thereby making it possible to reduce the size of the pyrolysis furnace.

In the thermal decomposition treatment system of the present invention, a preheating drying treatment device is arranged in front of the thermal decomposition furnace, and the heat transfer surface temperature of the preheating drying treatment device and the heat transfer surface temperature of the thermal decomposition furnace are increased. In the preheating drying treatment equipment, the object to be treated put in the pyrolysis furnace can be softened and melted so that it does not adhere to the inner wall, and the heat transmission rate in the pyrolysis furnace can be greatly increased. And the size of the pyrolysis furnace can be reduced.

[0113] In the thermal decomposition treatment system of the third aspect, the dried sludge obtained by drying the sludge discharged from the sewage treatment plant or the like is used in the former part of the thermal decomposition furnace or the former part of the preheating drying apparatus. Even when the heat transfer surface temperature of the preheating drying treatment device and the heat transfer surface temperature of the pyrolysis furnace are raised while processing sludge by mixing it into the material to be processed, it is thrown into the pyrolysis furnace, etc. In addition to preventing the processed object from softening and melting to adhere to the inner wall, the heat transmission coefficient in the pyrolysis furnace can be greatly improved, and the pyrolysis furnace can be downsized.

[0114] In the thermal decomposition treatment system of the fourth aspect, after sludge discharged from a sewage treatment plant or the like is dewatered,
The dried sludge obtained by drying this is mixed with the object to be treated in the pre-stage of the pyrolysis furnace or the pre-stage of the preheating drying treatment device, so that even when the water content of the sludge is high, the sludge can be treated. Even when the heat transfer surface temperature of the preheating drying treatment device and the heat transfer surface temperature of the pyrolysis furnace are raised, the object to be processed, which is put into the pyrolysis furnace, is softened and melted, and In addition to preventing heat from adhering to the thermal decomposition furnace, the heat transmission coefficient in the thermal decomposition furnace can be greatly improved, and the size of the thermal decomposition furnace can be reduced.

In the thermal decomposition treatment system according to the fifth aspect, slaked lime powder, dried sludge, and solid residue discharged from the thermal decomposition furnace are supplied to the object to be treated in the preceding stage of the thermal decomposition furnace or the preceding stage of the preheating drying treatment device. Collected from the solid residue having a certain size obtained from the solid residue, dust contained in pyrolysis gas discharged from the pyrolysis furnace, or solid residue discharged from the pyrolysis furnace. Even if the temperature of the heat transfer surface of the thermal decomposition furnace or the heat transfer surface of the thermal decomposition furnace is increased by mixing any of the iron ingots, The material to be treated is softened and melted and adheres to the inner wall and does not generate chlorine gas, and the heat transmission coefficient in the pyrolysis furnace is greatly improved, Furnace size can be reduced.

In the thermal decomposition treatment system according to the sixth aspect, the heat used in the preliminary drying treatment device or the thermal decomposition furnace can be efficiently recovered and returned to the preliminary drying treatment device or the like. Can be greatly improved.

According to the thermal decomposition treatment system of the present invention, the object to be treated stored in the storage tank is fermented without fail.
The amount of heat used in the pre-drying device can be greatly reduced, thereby greatly improving the thermal efficiency of the entire system.

In the thermal decomposition treatment system according to the eighth aspect, the temperature in the storage tank is optimized so that the object to be treated stored in the storage tank is surely fermented, whereby the amount of heat used in the preliminary drying device is increased. And greatly reduce
The thermal efficiency of the entire system can be greatly improved.

In the thermal decomposition treatment system according to the ninth aspect, the heat used in the predrying treatment device or the thermal decomposition furnace can be recovered, and the object to be treated stored in the storage tank can be fermented reliably. As a result, the amount of heat used in the preliminary drying device can be significantly reduced, and the thermal efficiency of the entire system can be significantly improved.

In the thermal decomposition treatment system according to the tenth aspect, the aerobic bacteria group or the anaerobic bacteria group is positively introduced into the storage tank to reliably ferment the object stored in the storage tank. As a result, the amount of heat used in the preliminary drying device can be significantly reduced, and the thermal efficiency of the entire system can be greatly improved.

In the thermal decomposition treatment system according to the eleventh aspect, the environment in the storage tank is adjusted in accordance with the aerobic bacteria group or the anaerobic bacteria group charged in the storage tank, whereby the storage tank is stored in the storage tank. The fermentation of the object to be treated can be surely performed, and the amount of heat used in the preliminary drying device can be significantly reduced, and the thermal efficiency of the entire system can be greatly improved.

According to the twelfth aspect of the present invention, the most suitable granular solid is selected according to the state of the thermal decomposition furnace, and the heat transfer surface temperature of the preheat drying apparatus and the heat transfer surface temperature of the thermal decomposition furnace are increased. Even when it is, the object to be treated put in the pyrolysis furnace and the like can be softened and melted so that it does not adhere to the inner wall, and the heat transmission coefficient in the pyrolysis furnace is greatly improved, The size of the thermal decomposition furnace can be reduced.

According to the thirteenth aspect of the present invention, by mixing slaked lime powder with the pyrolysis gas discharged from the pyrolysis furnace, chlorine contained in the pyrolysis gas discharged from the pyrolysis furnace can be obtained. The components can be absorbed by slaked lime to significantly reduce the concentration of chlorine components in the exhaust gas, and the solid components including slaked lime that has been input are collected and collected before the pyrolysis furnace or the preheating drying equipment. By mixing the collected solid components into the material to be processed, even when the heat transfer surface temperature of the preheating drying treatment device and the heat transfer surface temperature of the pyrolysis furnace are increased, the solid components are introduced into the pyrolysis furnace. The object to be treated is softened and melted, and can be prevented from adhering to the inner wall or generating chlorine gas.
The heat transmission coefficient in the pyrolysis furnace is greatly improved, and the size of the pyrolysis furnace can be reduced.

In the thermal decomposition treatment system of the present invention, the solid residue itself discharged from the pyrolysis furnace and the heat contained in the solid residue or the pyrolysis gas discharged from the pyrolysis furnace are contained. The dust itself and the heat contained in the dust can be used effectively, thereby greatly improving the resource efficiency and thermal efficiency of the entire system and greatly reducing the operating cost, while reducing the heat transfer of the preheating drying treatment equipment. Even when the surface temperature and the heat transfer surface temperature of the pyrolysis furnace are increased, the object to be treated put in the pyrolysis furnace or the like can be softened and melted so that it does not adhere to the inner wall. The heat transmission coefficient in the cracking furnace is greatly improved, and the size of the cracking furnace can be reduced.

In the thermal decomposition treatment system according to the present invention, the heat contained in the solid residue discharged from the thermal decomposition furnace or the heat contained in the thermal decomposition gas discharged from the thermal decomposition furnace is wasted. Without returning to the pre-drying device or the pyrolysis furnace, thereby greatly improving the thermal efficiency of the entire system and greatly reducing the operating cost while maintaining the heat transfer surface temperature of the pre-heating drying device and the thermal decomposition furnace. Even when the temperature of the heat transfer surface is raised, the object to be treated put in the pyrolysis furnace or the like can be softened and melted so that it does not adhere to the inner wall, and the heat transmission rate in the pyrolysis furnace can be reduced. And the size of the pyrolysis furnace can be reduced.

In the thermal decomposition treatment system according to the present invention, the heat of the object stored in the storage device is effectively utilized, thereby greatly improving the thermal efficiency of the entire system and greatly reducing the operation cost. , Even when the heat transfer surface temperature of the preheating drying treatment device and the heat transfer surface temperature of the pyrolysis furnace are increased,
The material to be treated put in the pyrolysis furnace and the like can be softened and melted so that it does not adhere to the inner wall, and the heat transmission coefficient in the pyrolysis furnace is greatly improved. The size can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a thermal decomposition processing system according to the present invention.

FIG. 2 is a block diagram showing a second embodiment of the thermal decomposition processing system according to the present invention.

FIG. 3 is a block diagram showing a third embodiment of the thermal decomposition processing system according to the present invention.

FIG. 4 is a block diagram showing a fourth embodiment of the thermal decomposition processing system according to the present invention.

5 is a sectional view showing a detailed configuration example of the storage device shown in FIG.

FIG. 6 is a block diagram showing a fifth embodiment of the thermal decomposition system according to the present invention.

7 is a longitudinal sectional view showing a detailed configuration example of the centrifugal thin film drying apparatus shown in FIG.

8 is a cross-sectional view showing a detailed configuration example of the centrifugal thin film drying apparatus shown in FIG.

FIG. 9 is a block diagram showing a sixth embodiment of the thermal decomposition processing system according to the present invention.

[Explanation of symbols]

1a, 1b, 1c, 1d, 1e, 1f: thermal decomposition treatment system, 2: object to be treated, 3: crusher, 4, 15: storage device, 5: granular solid, 6: granular solid storage device (mixed with granular solid) Apparatus), 7: Pre-drying treatment apparatus, 8: Pyrolysis furnace, 9:
Solid residue, 10: pyrolysis gas, 11: gas reformer, 1
2: pyrolysis treatment device, 13: char treatment device (granular solid mixing device), 14: exhaust heat recovery device, 16: storage tank,
17: stirring blade, 18: screw discharger, 19: opening, 20: duct, 21: conveyor, 22: aerobic bacteria group supporting substrate, 23: input device, 24: heating plate mechanism, 25: centrifugal thin film drying Apparatus, 40: exhaust pipe, 41: dry sludge supply pipe, 42: centrifugal dehydrator

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) C02F 11/12 F27B 17/00 A F27B 5/12 F23G 5/027 ZABZ 17/00 B09B 3/00 C // F23G 5 / 027 ZAB ZABD 303M (72) Inventor Yoshimi Ishikawa 2-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside the Toshiba Keihin Works Co., Ltd. (72) Ryo Nakajima 2-4-2 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Inside the Toshiba Keihin Plant (72) Nobuo Masaki 2-4, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside the Toshiba Keihin Plant (72) Masanori Kobayashi 2--4, Suehirocho, Tsurumi-ku, Yokohama, Kanagawa Inside the Toshiba Keihin Plant (72) Hiroshi Matsui 2-4, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside the Toshiba Keihin Plant 2-72-4, Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Toshiba Keihin Works Co., Ltd. (72) Inventor Katsuki Ide 2-4-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside the Toshiba Keihin Plant (72) Inventor Koichi Goto 2-4-4 Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture In-house F-term (reference) 3K061 AA23 AA24 AB02 AC01 AC13 FA10 FA21 4D004 AA01 AA02 AA46 BA03 CA04 CA13 CA14 CA18 CA27 CA42 CB04 CB13 CB42 CB45 CC01 CC02 CC07 CC11 4D059 AA30 BA03 BA11 BA25 BA27 BA29 BA48 BA56 BA56 CA10 CA16 CB04 CB06 DA05 DB33 EB01 4K061 AA01 BA12 CA03 CA08 FA01 FA02 FA06 HA00

Claims (16)

[Claims] 1. A pyrolysis furnace for heating an object to be treated containing an organic substance to separate it into a solid residue and a pyrolysis gas; and continuously supplying a particulate solid to the object to be charged into the pyrolysis furnace. And a granular solid mixing device for mixing, intermittently or intermittently, a pyrolysis treatment system. 2. A pyrolysis furnace for heating an object to be treated containing an organic substance to separate it into a solid residue and a pyrolysis gas; A pyrolysis treatment system, comprising: a predrying treatment device; and a granular solid mixing device that continuously or intermittently mixes particulate solids into an object to be charged into the predrying treatment device. . 3. The thermal decomposition treatment system according to claim 1, wherein the sludge is dried, and the resulting dried sludge is supplied to the thermal decomposition furnace or the preliminary drying treatment device as a granular solid. A thermal decomposition processing system, comprising: 4. The thermal decomposition treatment system according to claim 1, wherein the centrifugal dewatering device for dewatering the sludge, and the sludge dewatered by the centrifugal dewatering device are dried. A centrifugal thin-film drying apparatus for supplying sludge as granular solid to the pyrolysis furnace or the predrying processing apparatus. 5. The pyrolysis treatment system according to claim 1, wherein the particulate solid mixing device includes slaked lime powder, dry sludge, and solid residue discharged from the pyrolysis furnace as the particulate solid. ,
A solid residue having a certain size obtained from the solid residue, dust contained in a pyrolysis gas discharged from the pyrolysis furnace, or iron collected from the solid residue discharged from the pyrolysis furnace. A pyrolysis treatment system, characterized by using one of the masses. 6. The pyrolysis system according to claim 1, wherein heat is recovered from a solid residue or a pyrolysis gas discharged from the pyrolysis furnace and the pyrolysis furnace or predrying is performed. A pyrolysis treatment system, which is returned to a treatment device. 7. The thermal decomposition processing system according to claim 1, wherein the thermal decomposition processing system is disposed in a stage preceding the thermal decomposition furnace or the preliminary drying processing apparatus and is supplied to the thermal decomposition furnace or the preliminary drying processing apparatus. A thermal decomposition treatment system, comprising: a storage device for fermenting the processed object while temporarily storing the processed object by adjusting the fermentation conditions of the processed object. 8. The thermal decomposition system according to claim 7, wherein the storage device heats the object to be supplied to the thermal decomposition furnace or the preliminary drying device to promote fermentation. A thermal decomposition system. 9. The thermal decomposition treatment system according to claim 7, wherein the storage device temporarily stores using heat recovered from a solid residue or a pyrolysis gas discharged from the pyrolysis furnace. Wherein the object to be treated is heated to promote fermentation. 10. The thermal decomposition treatment system according to claim 7, wherein the storage device inputs a substrate carrying an aerobic bacteria group or an anaerobic bacteria group to the temporarily stored object to be treated. hand,
A pyrolysis treatment system that promotes fermentation. 11. The thermal decomposition processing system according to claim 7, wherein the storage device is configured to supply air from outside when the base material carrying the group of aerobic bacteria is charged into the temporarily stored object to be processed. Or take in oxygen, supply into the object to be treated, and when loading the substrate carrying the anaerobic bacteria group, in a closed storage tank, to make the object to be anoxic, A thermal decomposition treatment system characterized by the above-mentioned. 12. The thermal decomposition processing system according to claim 1, wherein even if a particulate solid is mixed in the object to be charged into the thermal decomposition furnace, the characteristic of the object to be processed is maintained. When it does not improve,
A type of granular solid to be mixed into the object to be processed, wherein the type is changed. 13. The slaked lime charging device according to claim 1, wherein slaked lime is injected into the pyrolysis gas discharged from the pyrolysis furnace. A solid collector that collects solid components contained in the pyrolysis gas into which slaked lime has been injected by the injector, and wherein the solid components collected by the solid collector are granulated. A pyrolysis treatment system, wherein the system is returned to a solid mixing device and used as a granular solid. 14. The pyrolysis treatment system according to claim 13, wherein a solid residue transport path from a solid residue processing device provided on an outlet side of the pyrolysis furnace to the particulate solid mixing device, or a heat treatment system for the pyrolysis furnace. A thermal decomposition treatment system, wherein a dust transfer path from the solid collector to the particulate solid mixing device provided on an outlet side has a heat retaining structure. 15. The thermal decomposition treatment system according to claim 1, wherein the particulate solid mixing device uses a solid residue discharged from the thermal decomposition furnace or heat recovered from a thermal decomposition gas. Then, after heating the granular solid, the granular solid is mixed with the object to be processed. 16. The thermal decomposition system according to claim 7, wherein an object transfer path from the storage device to the thermal decomposition furnace has a heat retaining structure. Processing system.