JPH0441704A - Method for removing organic material by fluid layer furnace - Google Patents

Abstract

PURPOSE:To quickly and cleanly thermally decompose and remove attached polymer, etc., by covering the opening of a fine hole of material to be treated with a specific filter and treating the covered opening in a fluid layer furnace in a state where the filter is situated on the lower side. CONSTITUTION:At least either one end face in which a fine hole 3 of material to be treated, e.g. spinneret 1 is opened is shielded with a filter 2 through which a fluid medium of furnace bed is not passed, but air gas can be passed, and the filter 2 is dipped into a fluid layer in a fluid layer furnace so that the filter is situated on the lower side. Thereby a polymer, etc., attached to the fine hole 3, etc., is thermally decomposed and removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for removing organic matter using a fluidized bed furnace.

More specifically, the present invention relates to a method for thermally decomposing and removing a processed material, such as a used spinneret, in which an organic polymer material is attached to the pores thereof, by heating it in a fluidized bed furnace.

[Prior Art] It has been known in the art to thermally decompose a workpiece to which organic polymer materials such as rubber, paint, oil, plastic, etc. are attached by heating it in a fluidized bed furnace. In Japanese Patent No. 282305, a material to be treated (specifically, a used spinneret, a filter, etc.) having an organic polymer material attached to the penetrated pores is heated in a fluidized bed furnace to undergo thermal decomposition. Disclosed is removal.

[Problems to be Solved by the Invention] However, in such conventional methods, the object to be treated is directly immersed in a fluidized bed, or, for example,
As disclosed in Japanese Patent No. 35707, since the material to be treated is immersed in a mesh bathget through which the fluidized medium (alumina, etc.) of the r-bed can pass, alumina, etc. is deposited into the pores of the material during treatment. The flowing medium flows into the hole, clogging or clogging the hole, which prevents or impedes the inflow of air gas, making it impossible to thermally decompose and remove the organic polymer material attached thereto. It was difficult.

In addition, since the diameter of a fluid medium such as alumina is generally 0.05W to 0.3 mm, this problem occurs when the through hole of the object to be treated has a relatively large diameter such as 0.3 tm or more. Although it does not occur in the case of pores with a diameter of 0.21 or less, it does occur in the case of pores with a diameter of 0.21 or less. Therefore, processing objects with pores such as spinnerets and spinneret filters cannot be treated in a fluidized bed furnace. It was blocked.

The present invention has focused on such a problem, and as a result of intensive studies from various aspects in order to solve this problem, the present invention has been developed by blocking the passage of a fluid medium through at least one end face of the object to be treated where the pores are opened. Shielded with a filter that allows only air gas to pass through,
They also discovered that the treatment can be carried out by immersing the object in a fluidized bed with this filter positioned below.

[Means for Solving the Problems] In other words, the method for removing organic matter using a fluidized bed furnace according to the present invention is to place a workpiece having an organic polymer material attached to the pierced pores in a heated fluidized bed. In a method for removing organic substances using a fluidized bed furnace in which the organic polymer material is thermally decomposed and removed by immersion in the fluid, at least one of the filters having the pores opened is provided with a filter capable of blocking passage of the fluid medium and allowing only air gas to pass through. The filter is attached to the object to be processed so as to cover the end face of the object, and the object is immersed in the fluidized bed so as to be processed so that the filter is positioned below.

In the present invention, organic polymer materials include rubber, paint, oil,
Fluidized medium is a general term for organic substances such as plastics, and is a general term for refractory particles such as alumina that are filled in a predetermined amount into the r-bed, and this fluidized medium passes through a gas distribution plate and is uniformly supplied to the r-bed. It is fluidized by air gas (pressurized air) to form a so-called fluidized bed.

Incidentally, the fluidized bed furnace can use various types of furnaces that are generally known in the past, but the heating may be done by electric heating with a heater, gas heating with a burner, etc., and the temperature is controlled at 400°C to 600°C.

When processing at a higher temperature than this, when using the most common alumina, this tends to adhere to the object to be processed.
In addition, when the object to be processed is metal, there is a greater risk of damage to the object. On the other hand, if the treatment is performed at a lower temperature than this, sufficient thermal decomposition of the organic polymer material becomes difficult. The approximate temperature is, for example, 400°C to 50°C for polyvinyl chloride.
0°C, or 425°C to 50°C for polypropylene
0℃, and in the case of silicone resin, 520℃~560℃
They can be heated to ℃.

In addition, the object to be treated is one that has an organic polymer material attached to the pores that have been penetrated, but materials other than metal, ceramic, and ink can be used as long as they can withstand the processing temperature. A used spinneret bag and its constituent parts are representative examples of objects to be treated in which an organic polymer material is attached to the pores that are formed through the pores. Examples include spinnerets and spinneret filters.

Furthermore, the filter may be any heat-resistant filter as long as it can block the passage of the fluid medium and allow only air gas to pass through, and may be of various types, such as plate-shaped filters made of ceramic or stainless steel, felt-shaped filters, or non-woven fabric filters. Filters can be used and may be constructed of multiple materials, such as a combination of wire mesh and ceramic sheets.

Regarding attachment of the filter to the object to be processed, for example, for the relatively thin plate spinneret 1 shown in FIG. It may be attached so as to be in contact with each of the end faces and to shield each face.In that case, it may be attached so as to shield only one end face of the opposite end face where the pore 3 is opened, but both It is preferable to wear it so as to shield it. In the embodiment shown in the figure, both filters 2 are attached to the spinneret 1 in a sandwich structure via bolts and nuts 4. However, the present invention is not limited thereto, and other embodiments may be used, for example, directly on the end face of the spinneret 1 in which the pores 3 are opened so as to be attachable and detachable via bolts or the like.
Fix it as appropriate! lE! It can be installed on the machine.

In addition, for the spinneret bag 5 shown in FIG. The filter 2 can be attached by various means such as fixing the jig 7 supporting the filter 2 to the female union 8 with bolts and nuts 4 or screwing it into the female union 8. It can be fixed and installed.

In addition, in Figure 2, 9 is a male union, 10 is a sand, and 11 is a male union.
12 represents a cap filter, 12 represents a perforated plate, and 13 represents a back inlet.

Next, the object to be treated that has been masked in this way, that is, the object to be treated is equipped with a filter 2 that can block passage of the fluid medium and allow only air gas to pass through, and is immersed in the fluidized bed for treatment. However, in this case, for example, in the case of the spinneret pack 5, the treatment is performed by immersing the spinneret pack 5 so that the filter 2 is positioned on the lower side. Further, in the case of a treated object such as a spinneret 11F in which pores 3 are opened and a filter 2 is attached so as to cover only one of the opposing end surfaces, the object is immersed and treated in the same manner. In either case, the object to be treated is immersed so that it is completely immersed in the fluidized bed, but at that time, it is not only immersed directly, but also immersed in a mesh-like pass get through which the fluid medium can pass. It may be stored and immersed.

The immersed object to be processed, such as the spinneret bag 5, is heated by the fluidized bed, and the polymer adhering to the pores 3, etc. is thermally decomposed and removed. That is, in the case of the spinneret pack 5, out of the heated fluidizing medium and air gas in the spinneret bed, the fluidizing medium is blocked by the filter 2, and only the air gas passes through, and is released into the spinneret 1 through the back outlet 6. Flowing into the pores 3, the perforated plate 12,
It passes through the mouth filter 11 and the sand 10 and is discharged from the bag inlet 13.

Therefore, the polymer attached to each component is heated and decomposed and removed by this single flow of heated gas. In addition, during removal, if the pores 3 of the spinneret 1 are blocked by the attached polymer, thermal decomposition removal is performed first, and when the pores are penetrated, the pores of the perforated plate 12 arranged in the upper stage are removed. can be thermally decomposed and removed one after another.

In this way, in the present invention, only the air waste, and moreover, this gas can be forced to flow into the pores 3, thereby quickly and effectively removing the adhering polymer, etc. by thermal decomposition ( The effect of air oxidation can be clearly seen. Note that the reason why the fluid can be forced to flow in is because a fluidized bed uses a fluidized medium, and a pressure difference occurs between the upper and lower positions in the bed depth direction.

[Example 1] As shown in FIG. 1, a thread with a diameter of 0.1
Two filters 2 were attached so as to abut each side of the opposite ends, in which groups of pores 3 (to which polyethylene terephthalate was attached) of 5 am were opened, so as to shield each side.

Note that the filter 2 used was a combination of a wire mesh and a ceramic sheet.

Next, this was set in a mesh basket so that the filter 2 was positioned horizontally, and an electrically heated fluidized bed furnace preheated to 520°C (alumina was used as the fluidized medium, and air gas was applied to the bed). It was then treated for 4 hours by being completely immersed in water without being supplied with water.After that, it was taken out from the furnace and cooled, and then inspected. There wasn't.

[Comparative Example 1] When processing was carried out under the same conditions as in Example 1 except that two filters 2 were not attached, about 10% of the 3 groups of pores were covered with alumina 't-1) (t#: There was an outbreak of malnutrition.

[Example 2] As shown in FIG. 2, a diameter of 0.15 +
A jig 7 and a bolt/nut 4 are used so as to cover one end surface of the spinneret 1 with the pores 3 (to which nylon 6 is attached) of 1. and installed filter 2. Note that the filter 2 used was one made of ceramic foot.

Next, this was set in a mesh bathget with the filter 2 positioned at the bottom, and an electrically heated fluidized bed furnace preheated to 450°C (alumina was used as the fluidized medium).
(air gas was supplied to the bed) so as to be completely submerged and treated for 4 hours. Thereafter, when it was inspected after being taken out from the furnace and cooled, no deposits (defects in removal) were found in any of the pores 3. Note that the porous plate 12 and the cap filter 11 were also the same.

[Comparative Example 2] When the treatment was carried out under the same conditions as in Example 2 except that the treatment was carried out for 10 hours without attaching co-filter 2, approximately 75% of the 3 groups of pores were clogged with alumina (defective removal). Ta.

[Effects of the Invention] As described above, according to the present invention, during a method for removing organic matter using a fluidized bed furnace, organic polymers attached from a workpiece having pores such as a used spinneret pack or spinneret can be removed. A suitable method of removing the material is obtained.

[Brief explanation of the drawing]

FIG. 1 is a front view showing how the filter 2 is attached to the spinneret 1, and FIG. 2 is a longitudinal sectional view showing how the filter 2 is attached to the spinneret pack 5. 1... Spinneret, 2... Filter, 3... Pore,
5... Spinneret pack (material to be processed)

Claims (1)

[Claims] 1. In a method for removing organic matter using a fluidized bed furnace, the workpiece having an organic polymer material attached to the pierced pores is immersed in a heated fluidized bed to thermally decompose and remove the organic polymer material. A filter capable of blocking the passage of a fluid medium and allowing only air gas to pass through is attached to the object to be treated so as to cover at least one end face in which the pores are opened, and the filter is attached to A method for removing organic matter using a fluidized bed furnace, characterized in that the treatment is carried out by immersing it in the fluidized bed so as to be located on the side.