JP2003119471A - Pyrolizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pyrolizer suppressing adhesion/accumulation of pyrolysis products on the flow passage of pyrolysis gas. SOLUTION: This pyrolizer has a scraper 9 having a fin 9a on the sidewall of a reactor core tube 2 facing an outer cylinder 3. The fin 9a scrapes the pyrolysis product adhered/accumulated on the outer cylinder 3 when rotating the reactor core tube 2 by using a rotating device 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal decomposition apparatus used for thermally decomposing a polymer compound so that it can be reused. The present invention relates to a thermal decomposition device in which the flow path is prevented from being blocked.

[0002]

2. Description of the Related Art In recent years, it has been desired to reuse resources on an international scale. Under such circumstances, for example, when recycling a polymer compound such as plastic such as vinyl chloride resin or rubber, a thermal decomposition device as shown in FIG. 5 is used.

In this thermal decomposition apparatus, the liquefied polymer compound is gasified, and the decomposed gas is cooled, for example, and used as a recycled product such as fuel oil.

FIG. 5 is a diagram schematically showing a cross section of such a thermal decomposition apparatus, and FIG. 6 is a diagram schematically showing a cross section taken along the line AA in FIG. In this specification, a polymer compound such as vinyl chloride resin, which is an object of thermal decomposition, is simply referred to as a thermal decomposition product, and a gasified product thereof is referred to as a decomposition gas.

The pyrolyzer 1 comprises a cylindrical core tube 2,
An outer cylinder 3 in which the core tube 2 is installed, a heating jacket 4 which is provided so as to cover the outer tube 3 and heats a pyrolyzate stored in the core tube 2, and a liquefied pyrolyzate in the core The tube 2 includes a supply device 5 that supplies the tube 2, a rotating device 6 that rotates the core tube 2, and the like.

The core tube 2 is provided with a plurality of core tube outlets 7 through which the heat component gas flows out, and the outer tube 3 is an outer tube exhaust for discharging the decomposition gas generated in the thermal decomposition apparatus 1 to the outside of the apparatus. An exit 8 is provided.

With such a structure, the melt 10 of the pyrolyzed product supplied into the furnace core tube 2 by the supply device 5 is, for example, 300 to 500 by the heating jacket 4 provided in the outer cylinder 3.
When it is heated to ℃, it decomposes and becomes decomposed gas.

At this time, the core tube 2 is rotated by the rotating device 6 so that the molten material 10 of the pyrolyzed product is not solidified.

The decomposed gas thus generated is discharged from the core tube discharge port 7, passes through the gas flow path S between the core tube 2 and the outer cylinder 3, and is discharged from the outer cylinder discharge port 8 to the outside of the apparatus. It

[0010]

However, in the above-mentioned configuration, when the operation is continued, as shown in FIGS. 7 and 8, the thermal decomposition products B generated during thermal decomposition pass through the gas flow path S. There is a problem that the gas flow passage S is blocked by gradually adhering to and depositing on the surface of the outer cylinder 3 to be formed, the surface of the core tube 2, the core tube discharge port 7 and the like.

For this reason, the internal pressure of the thermal decomposition apparatus 1 rises, and it becomes necessary to use a large-capacity pressure maintaining apparatus such as a vacuum pump (not shown), or the adhered / deposited thermal decomposition product B is generated. A large amount of fuel is required to maintain the temperature of the core tube 2 as a cause of lowering heat conduction from the outer tube 3 to the core tube 2.

Therefore, the present invention makes it possible to operate the apparatus for a long period of time and to operate with a small amount of fuel by suppressing the deposition and accumulation of the thermal decomposition products in the gas flow path. The purpose is to provide.

[0013]

In order to solve the above problems, the invention according to claim 1 thermally decomposes a thermally decomposed product,
A cylindrical core tube that discharges the decomposed gas from the core tube discharge port, an outer cylinder in which the core tube is rotatably installed and discharges the decomposed gas to the outside of the apparatus from the outer cylinder discharge port, and the core tube. And a rotating device for rotating the pyrolysis device, in which decomposition gas from the core tube passes through a space formed between the core tube and the outer tube and is discharged from the outer tube outlet to the outside of the machine. A scraper device that scrapes off pyrolysis products generated by pyrolysis that adheres to and accumulates in the gas flow path is provided to prevent the pyrolysis products from adhering to and accumulate in the decomposition gas flow path. It is possible to operate for a long period of time and to operate with less fuel.

In the invention according to claim 2, the scraper device is provided on the side surface of the core tube facing the outer cylinder, and the scraper device is attached to the outer cylinder by rotating the core tube by the rotating device.
Equipped with fins that scrape off the accumulated thermal decomposition products, it suppresses the adhesion and accumulation of thermal decomposition products on the outer cylinder, which enables long-term operation of the equipment and operation with less fuel. It is characterized by having done.

According to a third aspect of the present invention, the scraper device is provided at the core tube discharge port, and rotates around the opening end of the core tube discharge port while sliding with the rotation of the core tube. Equipped with an outlet chain that scrapes off the pyrolysis products that have adhered to and accumulated on the exhaust port, and prevents the pyrolysis products from adhering to and depositing on the core tube exhaust port, which enables long-term operation of the equipment. It is characterized by being able to operate with less fuel.

According to a fourth aspect of the invention, the scraper device is flexibly installed in the longitudinal direction of the core tube so that the scraper device slides on the side surface of the core tube facing the outer cylinder as the core tube rotates. A core tube chain for scraping off the pyrolysis products attached / deposited on the side surface of the core tube to suppress the attachment / deposition of the pyrolysis products on the side surface of the core tube. The feature is that it can be operated for a period of time and can be operated with less fuel.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. The same components as those of the conventional configuration will be designated by the same reference numerals, and the description thereof will not be repeated.

FIG. 1 is a thermal decomposition apparatus 1 according to this embodiment.
2 is a diagram schematically showing a cross section (longitudinal direction) of FIG.
FIG. 2 is a diagram schematically showing an AA cross section in FIG. 1.

The core tube 2 of the thermal decomposition apparatus 1 according to the present invention is provided with a scraper device 9 made of a member having heat resistance and corrosion resistance such as metal on the outer cylinder 3 side.

Although FIG. 1 and the like show a case where fins 9a extending in the longitudinal direction of the core tube 2 are provided in a cross shape as the scraper device 9, the present invention is not limited to this. Alternatively, for example, the fins 9a may be provided in a spiral shape, or a metal brush or the like may be used. Further, it is clear from the spirit of the invention that the shape need not be a cross.

With such a configuration, the molten material 10 of the thermal decomposition product supplied to the furnace core tube 2 by the supply device 5 is heated by the heat from the heating jacket 4 and thermally decomposed into a decomposition gas.

The decomposed gas is discharged from the core tube discharge port 7 to the core tube 2
The gas flows through the gas flow path S surrounded by the outer cylinder 3 and is discharged from the apparatus through the outer cylinder discharge port 8.

The thermal decomposition of the thermal decomposition product is carried out while rotating the core tube 2 by the rotating device 6, and the rotating device 6 is arranged so that the decomposition gas generated at that time does not leak outside the device.
The rotation by is formed to maintain airtightness.

Since the core tube 2 is rotated by the rotating device 6 as described above, the fin 9a provided on the core tube 2 is provided.
Also, the thermal decomposition product B attached to and deposited on the outer cylinder 3 facing the gas flow path S is prevented from being scraped off and the gas flow path S is prevented from being blocked by the thermal decomposition product B. ing.

Therefore, even if the apparatus is operated for a long period of time, the internal pressure of the thermal decomposition apparatus 1 does not rise, so there is no need to increase the capacity of a vacuum pump or the like (not shown), and the equipment cost can be suppressed and the adhesion -The number of times of maintenance or the like for the purpose of removing the accumulated thermal decomposition product B can be reduced and the running cost can be suppressed.

Further, the adhesion of such a thermal decomposition product B
Since the accumulation is suppressed, the heat from the heating jacket 4 is efficiently transferred to the pyrolyzate of the core tube 2, and the fuel efficiency used can be saved.

Next, a second embodiment of the present invention will be described with reference to the drawings. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted as appropriate.

In the above-described embodiment, the fin 9a is provided as the scraper device 9 in the core tube 2 so that the pyrolysis products B adhered to and deposited on the outer cylinder 3 facing the gas flow path S are scraped off.

However, the pyrolysis products B adhere and deposit not only on the outer cylinder 3 facing the gas flow path S but also on the core tube discharge port 7.

Therefore, in the present embodiment, as shown in FIG. 3, a scraper device 9 is provided at the core tube discharge port 7.

FIG. 3 is a diagram schematically showing a cross section of the core tube 2 as seen from the rotating device 6 side. As a scraper device 9, a chain is provided in an annular shape through each core tube outlet 7 adjacent thereto. ing. Hereinafter, the chain provided at the core tube discharge port 7 will be referred to as a discharge chain 9b.

This discharge port chain 9b is sufficiently long as compared with connecting the adjacent core tube discharge ports 7 in a ring shape, and slides along the opening end of the core tube discharge port 7 as the core tube 2 rotates. .

As a result, when the core tube 2 makes one revolution, the outlet chain 9b also makes a round around the opening end of the core tube outlet 7, and at that time, the heat deposited and accumulated on the core tube outlet 7 is generated. The decomposition product B can be scraped off, and the obstruction of the core tube discharge port 7 can be prevented.

Therefore, since the internal pressure of the thermal decomposition apparatus 1 does not rise even if the apparatus is operated for a long period of time, it is not necessary to increase the capacity of a vacuum pump or the like (not shown), the equipment cost can be suppressed, and the adhesion can be prevented. -The number of times of maintenance or the like for the purpose of removing the accumulated thermal decomposition product B can be reduced and the running cost can be suppressed.

Further, the adhesion / deposition of such a thermal decomposition product B
Since the accumulation is suppressed, the heat from the heating jacket 4 is efficiently transferred to the pyrolyzate of the core tube 2, and the fuel efficiency used can be saved.

Although the core tube discharge port 7 shown in FIG. 3 and the like is an elongated hole that is long in the radial direction of the core tube 2, the present invention is not limited to the elongated hole, and the core tube 2 can be rotated. Accordingly, it is sufficient that the discharge port chain 9b can slide along the opening end of the core tube discharge port 7, and for example, a circle is also good.

Also, regarding the method of attaching the outlet chain 9b, one outlet chain 9b is attached to the adjacent core tube outlets 7, but it is not necessary to use the adjacent core tube outlets 7. For example, Three core tube outlets 7
One chain may be attached to.

Further, it is clear that the fin 9a described in the first embodiment may be provided together, and the thermal decomposition product B can be scraped off more efficiently.

Next, a third embodiment of the present invention will be described with reference to the drawings. The same components as those in the above-described embodiment are designated by the same reference numerals and the description thereof will be omitted as appropriate.

In the first embodiment, the fins 9a are provided in the core tube 2 so as to scrape off the pyrolysis products B adhering to and depositing on the outer cylinder 3 facing the gas passage S.

However, the thermal decomposition products B adhere and deposit not only on the outer cylinder 3 facing the gas flow passage S but also on the furnace core tube 2 facing the gas flow passage S.

Therefore, in the present embodiment, as shown in FIG. 4, a scraper device 9 is provided so as to slide on the surface of the core tube 2 in addition to the above-described structure.

Although FIG. 4 shows the case where the fin 9a described in the first embodiment is provided side by side, the outlet chain 9b described in the second embodiment may also be provided side by side. Is clear.

FIG. 4 is a side view of the core tube 2. A plurality of chains are provided as scraper devices 9 in the longitudinal direction of the core tube 2. Hereinafter, the chain provided in the core tube 2 will be referred to as a core tube chain 9c.

The length of the core tube chain 9c is the core tube 2 concerned.
One core tube chain 9c is provided between the adjacent fins 9a, which is longer, and is installed in a loose state as shown in FIG.

Therefore, when the core tube 2 rotates, the slackened portion slides on the surface of the core tube 2 on the outer cylinder 3 side, and the pyrolysis products B adhered and deposited on the surface can be scraped off. Like

Of course, it is obvious that the length of the core tube chain 9c may be adjusted so that the core tube chain 9c also slides on the side surface of the fin 9a.

Therefore, even if the apparatus is operated for a long period of time, the internal pressure of the thermal decomposition apparatus 1 does not rise, so there is no need to increase the capacity of a vacuum pump or the like (not shown), and the equipment cost can be suppressed and the adhesion -The number of times of maintenance or the like for the purpose of removing the accumulated thermal decomposition product B can be reduced and the running cost can be suppressed.

In addition, the adhesion of such a thermal decomposition product B
Since the accumulation is suppressed, the heat from the heating jacket 4 is efficiently transferred to the pyrolyzate of the core tube 2, and the fuel efficiency used can be saved.

[0050]

As described above, according to the present invention,
Since a scraper device was installed to scrape the thermal decomposition products generated by thermal decomposition that adhere and accumulate in the cracked gas flow path, the thermal decomposition products are suppressed from sticking and depositing in the cracked gas flow path. As a result, the device can be operated for a long time and can be operated with a small amount of fuel.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a cross section of a thermal decomposition apparatus applied to the description of a first embodiment of the present invention.

FIG. 2 is a diagram schematically showing an AA cross section in FIG.

FIG. 3 is a schematic diagram of a thermal decomposition apparatus applied to the description of the second embodiment of the present invention.

FIG. 4 is a schematic diagram of a thermal decomposition apparatus applied to the description of the third embodiment of the present invention.

FIG. 5 is a diagram schematically showing a cross section of a thermal decomposition apparatus applied to the description of the conventional technique.

6 is a diagram schematically showing an AA cross section in FIG.

FIG. 7 is a diagram schematically showing a cross section of a thermal decomposition apparatus applied to the description of the problem.

8 is a diagram schematically showing an AA cross section in FIG.

[Explanation of symbols]

1 Pyrolysis device 2 core tube 3 outer cylinder 4 heating jacket 5 feeder 6 rotating device 7 Core tube outlet 8 Outer cylinder outlet 9 Scraper device 9a (9) Fin 9b (9) Outlet chain 9c (9) Core tube chain 10 Melt of pyrolysis material

Continued front page    F-term (reference) 4F301 AA03 AA17 CA09 CA26 CA42                       CA52 CA68                 4H029 CA12 CA16

Claims (4)

[Claims] 1. A cylindrical core tube that thermally decomposes a pyrolyzate and discharges the decomposed gas from the core tube discharge port, and the core tube is rotatably provided internally, and the external cylinder discharge port is used to An outer cylinder for discharging decomposed gas to the outside of the apparatus and a rotating device for rotating the core tube are provided, and the decomposed gas from the core tube passes through a space formed between the core tube and the outer tube. In the thermal decomposition device that is discharged from the outer cylinder discharge port to the outside of the machine, a scraper device that scrapes off a thermal decomposition product generated by thermal decomposition that adheres to and accumulates in the flow path of the decomposition gas is provided. And thermal decomposition equipment. 2. The scraper device is provided on a side surface of the furnace core tube facing the outer cylinder, and the pyrolysis product adhered to and deposited on the outer cylinder when the furnace core tube is rotated by the rotating device. The thermal decomposition apparatus according to claim 1, further comprising a fin for scraping off the scrap. 3. The scraper device is provided at the core tube discharge port, and rotates around the opening end of the core tube discharge port while sliding with the rotation of the core tube to rotate the core tube discharge port. The thermal decomposition apparatus according to claim 1 or 2, further comprising: an outlet chain that scrapes off the thermal decomposition products attached to and deposited on the surface. 4. The scraper device is flexibly installed in a longitudinal direction of the core tube so as to slide on a side surface of the core tube facing the outer tube as the core tube rotates, and the scraper device is installed. A core tube chain for scraping off the pyrolysis products attached and deposited on the side surface of the tube is provided.
4. The thermal decomposition apparatus according to any one of 3 to 3.