JPH1179724A - Firing method of activated carbon molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely and easily fire without damaging the shape and further to decrease the discharge of a harmful gas generated in firing by arranging a shielding material containing a carbonaceous material to shield the contact with oxygen and firing at a specific temp. SOLUTION: The firing is carried out at 400-1000 deg.C. The carbonaceous material is a granular or the like activated carbon, coke, charcoal, anthracite, raw coal, carbon black or the like and the activated carbon or a fired coke is particularly preferable. In the case of incorporating an alkali (earth) metallic compound in the shielding material, the acidic harmful gas generated by firing is allowed to react with the metals to be made hamless. As the alkali (earth) metal, potassium, sodium, calcium and magnesium are mentioned and a compound of the metal can be selected from a carbonate, a bicarbonate, an oxide or a hydroxide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sintering an activated carbon molded article having a predetermined shape, and more particularly, to a method for sintering the activated carbon molded article reliably and easily without impairing the shape of the activated carbon molded article. The present invention relates to a firing method capable of reducing emission of harmful gas generated.

[0002]

BACKGROUND OF THE INVENTION Activated carbon formed into a predetermined shape such as honeycomb activated carbon or sheet activated carbon is easier to handle than ordinary granular activated carbon. In particular, honeycomb activated carbon has a high adsorption rate and fluid pressure. Due to its excellent features such as low loss, efficient treatment without fluid drift, and easy attachment and detachment to various devices, recently, especially deodorization and
Its use has been extended to removal of volatile organic components, air purification and harmful substance removal treatment, and sheet-like activated carbon is used for activated carbon electrodes and the like.

[0003]

2. Description of the Related Art Conventionally, as a method for regenerating used activated carbon, a heat regeneration method and a wet oxidation method are known, and as a method for regenerating granular activated carbon, a heat regeneration method is generally used. Rotary kilns, Hereshof furnaces, fluidized-bed furnaces, moving bed retorts, etc. are used as these heating and regenerating methods. By regenerating and recycling activated carbon, which has no significant difference in adsorption performance, it promotes resource saving and reduces costs.

[0004]

However, in the above-mentioned conventional heating and regeneration methods, in order to uniformly regenerate the used activated carbon, it is necessary to directly stir or move the activated carbon in each heating device. Therefore, the above-described conventional technology cannot be applied to an activated carbon molded body formed into a predetermined shape such as a honeycomb activated carbon or a sheet activated carbon because the activated carbon is damaged by a mechanical impact. Further, the method of spraying heated steam or heated carbon dioxide gas onto the activated carbon molded body to regenerate the activated carbon molded body has a problem that the entire activated carbon molded body cannot be uniformly regenerated. For the above reasons, the used activated carbon compact is currently discarded. However, when the activated carbon that has adsorbed harmful substances is discarded, there is a risk of secondary contamination. Activated carbon compacts such as honeycomb activated carbon are more expensive than conventional granular activated carbon. Therefore, if the activated carbon molded body can be regenerated, the economic effect is large,
Efficient regeneration methods are also desired in terms of resource saving and waste reduction.

On the other hand, in the conventional process of manufacturing an activated carbon molded body, the inside of a firing furnace is heated and fired using an oxygen-free atmosphere using nitrogen gas or the like. However, maintaining the oxygen-free atmosphere is complicated. In addition, continuous processing is difficult in terms of gas sealing, and batch processing requires heating and cooling for each batch, which is not economical.

Further, compounds such as binders and molding aids added during the production of an activated carbon molded article, and odor components and harmful substances adsorbed on used activated carbon may generate harmful gases upon heating. The conventional firing method also has a problem that these exhaust gas treatments are required.

The present invention has been made to solve the above problems and to provide a firing method which can surely and easily be fired without impairing the shape of an activated carbon molded body and can further reduce emission of harmful gas generated by firing. is there.

[0008]

In order to solve the above-mentioned problems, the present invention will be described with reference to, for example, FIGS. 1 to 5 showing an embodiment of the present invention. It is configured as follows. That is, the present invention
A shielding material (3) containing a carbonaceous material is arranged around the activated carbon molded body (1) to block contact between the activated carbon molded body (1) and surrounding oxygen. ~ 1000 ° C
Characterized by firing.

The above-mentioned activated carbon molded body refers to activated carbon formed into a predetermined shape, specifically, honeycomb-shaped activated carbon, sheet-shaped activated carbon, and the like, but needless to say, the shape is not limited to a specific shape. It is to be noted that a chemical used for deodorization or catalytic reaction can be attached to the activated carbon molded body after firing. Further, when manufacturing the activated carbon molded body,
In general, a binder and a molding aid are mixed with the activated carbon raw material.Examples of these binders include polymers containing chlorine such as vinyl chloride and vinylidene chloride, copolymers, and polymers containing nitrogen such as acrylic and isocyanate. Copolymers, other high molecular compounds containing sulfur, halogen, etc.
Those which generate harmful gas or vapor by thermal decomposition can be given.

[0010]

Since the activated carbon compact is heated at a high temperature of 400 ° C. or more, the substances contained in the activated carbon and the adsorbed substances are surely thermally decomposed and separated from the activated carbon compact. For this reason, there is no need to use a rotary kiln or the like, and the activated carbon molded body is not likely to receive a mechanical impact during firing. Moreover,
Since a shielding material containing a carbonaceous material is disposed around the activated carbon molded body, the surrounding oxygen is used for combustion of the carbonaceous material, and the surroundings of the activated carbon molded body are surely in an oxygen-free atmosphere. In addition, combustion of the activated carbon compact is effectively prevented.

The carbonaceous material is, for example, powdered or granular activated carbon, coke, charcoal, anthracite, ash,
Although it refers to carbon black and the like, activated carbon and calcined coke are particularly preferable because they are inexpensive and have an adsorption performance.

When the above-mentioned shielding material contains at least one of an alkali metal compound and an alkaline earth metal compound, hydrochloric acid, sulfur dioxide, nitrogen oxide, dioxin, cyanide discharged from the activated carbon compact by firing. Acidic harmful gas reacts with these metal compounds to make them harmless.

Examples of the alkali metal or alkaline earth metal include potassium, sodium, calcium and magnesium. These compounds include at least one of carbonate, bicarbonate, oxide and hydroxide. And specifically, those having a high melting point, such as slaked lime, dolomite, and limestone, are preferable. In particular, 400-1
What decomposes | disassembles in a temperature range of 000 degreeC and discharge | releases carbon dioxide gas and water vapor | steam is more preferable since it can activate an activated carbon molded object.

The mixing ratio (weight ratio) of the above-mentioned alkali metal compound or alkaline earth metal compound varies depending on the type and amount of the gas component released from the activated carbon compact during firing, but is usually 0% based on the carbonaceous material. 0.05 to 5, more preferably 0.1 to 1. The metal compound may be in the form of a powder or granule mixed with the carbonaceous material in the form of powder, or the metal compound may be made into a solution and impregnated in the carbonaceous material.

The shielding material may be any material which can effectively block the contact between the activated carbon molded body and the surrounding oxygen, and is easy to handle in the form of powder or granules. The shape such as a shape is not particularly limited.

When the activated carbon molded body and the shielding material are accommodated in a heat-resistant container and the activated carbon molded body is buried in the shielding material, the carbonaceous material contained in the shielding material burns and oxygen in the heat-resistant container is decomposed. It is consumed, and the surroundings of the activated carbon molded body surely become an oxygen-free atmosphere. Therefore, only by preparing a heat-resistant container having a simple configuration, the contact between the activated carbon molded body and the surrounding oxygen can be reliably blocked by the shielding material. In addition, since the activated carbon molded body is buried in the shielding material, heat is transmitted well to the activated carbon molded body. Further, when an alkali metal compound or an alkaline earth metal compound is contained in the shielding material, the metal compound and the harmful gas generated from the activated carbon compact react more reliably.

An inner heat-resistant container is disposed inside the outer heat-resistant container, and the activated carbon molded body is accommodated in the inner heat-resistant container.
When the shielding material is filled between the outer heat-resistant container and the inner heat-resistant container, the shielding material can be disposed separately from the activated carbon molded body, so that there is no possibility that the shielding material adheres to the activated carbon molded body, and There is no need to subsequently remove the shielding material from the surface of the activated carbon compact.

The heat-resistant container and the inner and outer heat-resistant containers are also called setters and sheaths, and are made of metal, ceramic, porcelain, etc.
It is composed of a material with excellent heat resistance and corrosion resistance at the firing temperature. Above all, porcelain having high thermal conductivity and containing alumina as a main component is preferable.

When the activated carbon molded article is a used activated carbon molded article used for adsorption, particularly when the activated carbon molded article is deteriorated by adsorbing inorganic sulfur or a large amount of sulfuric acid or a salt thereof, a silicon compound, etc. When the molded body is preliminarily washed with water, an alkali, an acid, an organic solvent such as carbon disulfide or the like, and then fired, the activated carbon molded body can be more effectively regenerated.

If the activated carbon molded body undergoes a rapid temperature change in the process of firing the activated carbon molded body, the strength and hardness are reduced due to thermal expansion and contraction, rapid desorption and decomposition of adsorbed substances, and distortion occurs. In some cases, damage such as cracks may occur. Therefore, after the activated carbon molded body is preheated at 400 ° C. or less, it is fired at 400 to 1000 ° C., and then gradually cooled to 400 ° C. or less. Can be prevented, which is more preferable.

In this case, the heat-resistant container accommodating the activated carbon molded body is placed on a moving means, and the moving means is moved in a tunnel kiln set at a predetermined temperature distribution to fire the activated carbon molded body. Can be continuously fired without giving a rapid change in temperature.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

[0023]

First Embodiment FIG. 1 is a cutaway perspective view of a heat-resistant container showing a state in which an activated carbon molded body and a shielding material are housed in a first embodiment of the present invention. The first embodiment is applied to the case of regenerating an activated carbon molded article having reduced adsorption performance which is used for deodorizing animal breeding houses and has a honeycomb shape of 87 mm × 45 mm × 20 mm at 300 cells per square inch. Activated carbon is used.

[0024] As shown in FIG.
(1) is 600ml (100mm x 100mm x 60mm)
Five pieces are housed in a porcelain heat-resistant vessel (2), and 200 ml of a shielding material (3) is filled around the honeycomb-shaped activated carbon (1).
The honeycomb-shaped activated carbon (1) is buried in the shielding material (3) to block contact with surrounding oxygen. A porcelain lid (4) is placed on top of the heat-resistant container (2),
(2) Easy handling and heat-resistant container during firing
(2) It is easy to make the atmosphere oxygen-free.
(4) can be omitted.

The filling amount of the shielding material (3) is such that the activated carbon compact (1) does not come into direct contact with the surrounding oxygen such as the furnace atmosphere even if the carbonaceous material burns and disappears during firing. Any amount may be used, and the number is appropriately increased or decreased according to the type of the activated carbon compact, the amount of adsorption, the type of the carbonaceous material, the firing conditions, the capacity of the heat-resistant container, and the like. Further, the shielding material (3) remaining after the firing can be reused by washing with water as needed and appropriately replenishing a carbonaceous material.

Next, the firing treatment of the above-mentioned honeycomb-shaped activated carbon (1) will be described. First, the honeycomb activated carbon
A heat-resistant container (2) containing (1) and a shielding material (3) is set in a hearth-type electric furnace, and the temperature is raised to 400 ° C. over 2 hours.
(Pre-heat treatment). Thereafter, the temperature was raised to 800 ° C. in one hour,
Hold at 800 ° C. for 2 hours. Next, the power of the electric furnace was turned off, and the inside of the furnace was gradually cooled to 400 ° C., and then the honeycomb-shaped activated carbon (1) was taken out from the heat-resistant container (2) and allowed to cool naturally in the atmosphere. The shielding material (3) is removed from the surface of 1).

[0027]

Examples 1 to 6 The above sintering method was carried out by changing the type of the shielding material (3) as follows. That is, in Example 1, a shielding material in which powdered activated carbon as a carbonaceous material and calcium carbonate as an alkaline earth metal compound were mixed at a ratio of 3: 1 was used. In Example 2, a shielding material in which powdered activated carbon and calcium hydroxide were mixed at a ratio of 5: 1 was used. In Example 3, sodium carbonate was used in place of the calcium carbonate of Example 1 described above. In Example 4, magnesium carbonate was used in place of the calcium carbonate of Example 1 described above. In Example 5, petroleum coke was used in place of the powdered activated carbon of Example 1 described above. In Example 6, a shielding material consisting of only petroleum coke was used.

With respect to the above Examples 1 to 6, the evidence of combustion by firing and the presence or absence of odor during firing were compared with the case where no shielding material containing a carbonaceous material was used. Comparative Example 1
Does not use any shielding material. In Comparative Example 2,
A shielding material made of silica powder was used.

Further, the adsorbing performance of the fired honeycomb activated carbon in Examples 1 to 6 and Comparative Examples 1 and 2 was measured by measuring the BET specific surface area by nitrogen adsorption. In comparison with the finished honeycomb activated carbon. These results are shown in Comparative Table 1 in FIG.

As is clear from the results of Comparative Table 1, in each of Comparative Examples 1 and 2, the honeycomb-shaped activated carbon was burned by firing, but in Examples 1 to 6, there was no evidence of combustion. Was. Moreover, in Examples 1 to 5 in which the shielding material (3) contained an alkali metal compound or an alkaline earth metal compound, no odor was generated during firing and the emission of harmful gases generated by firing was reduced. did it. Also,
The adsorption performance of each of the honeycomb-shaped activated carbons fired according to Examples 1 to 6 was comparable to that of the unused honeycomb-shaped activated carbon, and was sufficiently regenerated.

[0031]

[Second Embodiment] In this second embodiment, a honeycomb-shaped activated carbon used for deodorizing a sewage sludge pipe and having deteriorated performance is used.
After pre-cleaning, firing was performed in the same manner as in the first embodiment.
In addition, the used honeycomb activated carbon contains 1 sulfur.
It contained 2.5% and 2.6% sulfuric acid.

[0032]

Examples 7 to 9 As the above preliminary washing, used honeycomb activated carbon was boiled gently for 30 minutes in an 8% aqueous solution of sodium hydroxide, and then drained.
A pre-cleaning treatment of drying at 0 ° C. was performed. Then, this pre-cleaned honeycomb-shaped activated carbon was embedded in a shielding material having the same components as in Example 1 and fired (Example 7).

With respect to the above-mentioned Example 7, the case of baking without pre-cleaning (Example 8) and the case of Example 6 without pre-cleaning were examined for evidence of combustion by baking and the presence or absence of odor generation during baking. A comparison was made with the case of baking using a shielding material of the same component (Example 9). In addition, the adsorption performance of the fired honeycomb activated carbon was compared with unused honeycomb activated carbon, unregenerated used honeycomb activated carbon, and used honeycomb activated carbon subjected to only preliminary cleaning. These results are shown in Comparative Table 2 in FIG.

As is apparent from Comparative Table 2, it was found that when pre-cleaning and firing were performed, the adsorption performance could be regenerated to approximately the same as that of unused honeycomb activated carbon.

In Example 9, exhaust gas containing a sulfur odor and a pungent odor of sulfurous acid gas was discharged from the opening of the electric furnace during firing, and sulfur crystals were deposited at the opening. Therefore, when the shielding material is composed only of a carbonaceous material, the activated carbon molded body is not burned, but an exhaust gas treatment is separately required. From this viewpoint, the shielding material includes an alkali metal compound or an alkaline earth metal. It is desirable to include a compound.

[0036]

Third Embodiment This third embodiment is applied to firing in the case of manufacturing an activated carbon molded body. That is, a molding aid and a binder are added to the powdered activated carbon raw material, and the mixture is molded into a predetermined shape, and then fired under the same conditions as in the first embodiment.

[0037]

Example 10 As a raw material for activated carbon, a BET specific surface area of 16
00m ² / g, average particle using size 7μm coconut shell activated carbon, the activated carbon material 1000 g, curdlan 25g and hydroxypropyl methylcellulose as molding aids (2
A 75% by weight aqueous solution having a viscosity of 100,000 centipoise at 20 ° C.) is added and mixed well. Next, this mixture was charged into a biaxial kneader, 780 g of a vinylidene chloride polymer latex having a solid content of 55% by weight and 1,050 g of water were added, and kneaded for 2 hours. During the kneading, cooling was performed by circulating cold water at 10 ° C. through the kneader jacket.

The composition obtained by the above kneading was charged into an extruder and kneaded under vacuum to obtain a molding composition. Next, a sheet molding die was attached to the extruder, and the molding composition was molded into a sheet having a width of 5 cm and a thickness of 1 mm.
This sheet molded product was cut to a length of 8 cm, 20 cut sheets were accommodated in the heat-resistant container used in the first embodiment, embedded in a shielding material having the same components as in the first embodiment, and fired.
A sheet of activated carbon was obtained.

The activated carbon sheet obtained by the above calcination had a BET specific surface area of 1050 m ² / g, and no evidence of burning or breakage was observed. Further, the vinylidene chloride polymer latex as a binder is thermally decomposed by the above-mentioned calcination, but no harmful components such as hydrochloric acid gas were discharged out of the furnace during this calcination.

[0040]

Fourth Embodiment FIG. 4 is a cutaway perspective view showing a state in which an activated carbon molded body and a shielding material are accommodated in a heat-resistant container used in a fourth embodiment. That is, in the fourth embodiment, the outer heat-resistant container
An inner heat-resistant container (6) is arranged inside (5), and the activated carbon molded body (1) is accommodated in the inner heat-resistant container (6). The outer heat-resistant container (5) and the inner heat-resistant container (6) The space is filled with a shielding material (3).

During firing, the carbonaceous material contained in the shielding material (3) burns, so that the inside of the outer heat-resistant container (5) is maintained in an oxygen-free atmosphere, and the activated carbon molded body (1) is burned. There is no fear. Moreover, since the activated carbon molded body (1) does not come into contact with the shielding material (3), there is no need to remove the shielding material attached to the activated carbon molded body (1) after firing, and the post-treatment is simple.

[0042]

Fifth Embodiment FIG. 5 is a schematic explanatory view of a tunnel kiln used in a fifth embodiment. In the first embodiment and the like, the case of batch firing using an electric furnace has been described. In the fifth embodiment, the activated carbon molded body is continuously fired using the tunnel kiln.

That is, as shown in FIG.
(7) consists of a pre-tropical zone (8), a sintering zone (9) and a cooling zone (10), and a trolley (11) on which a heat-resistant container (2) is placed is a tunnel kiln.
The inside of (7) is configured to sequentially pass through the pre-tropical zone (8), the sintering zone (9) and the cooling zone (10). In addition, the above heat-resistant container
Inside (2), similarly to the first embodiment and the like, an activated carbon molded body is housed in a state buried with a shielding material. It goes without saying that a heat-resistant container similar to the outer and inner heat-resistant containers (5.6) used in the fourth embodiment may be used instead of the heat-resistant container (2).

The pre-tropical zone (8) is a heat-resistant container that moves inside.
The temperature is set so that the activated carbon molded body in (2) is slowly heated to 400 ° C., and the firing zone (9) is 40 ° C.
The temperature is set so that firing can be performed at 0 to 1000 ° C.
Accordingly, when the inside of the tunnel kiln (7) is placed on a carriage (11) and moved, the activated carbon molded body in the heat-resistant container (2) is preheated at 400 ° C or lower, and then fired at a predetermined temperature of 400 to 1000 ° C. Then, it is gradually cooled to 400 ° C. or less and taken out.

[0045]

Since the present invention is constructed and operates as described above, it has the following effects.

(A) The activated carbon molded body is heated at a high temperature of 400 ° C. or more, and the substances contained in the activated carbon and the adsorbed substances are surely thermally decomposed and separated from the activated carbon molded body. Thus, even in the case of a used activated carbon molded body, it can be reliably regenerated.

(B) Moreover, there is no need to use a rotary kiln or the like, and there is no risk that the activated carbon molded article is subjected to a mechanical impact. In addition, the periphery of the activated carbon molded article is surely free of oxygen without using nitrogen gas or the like. Since the atmosphere is formed and combustion is prevented, the activated carbon molded body can be fired reliably and easily without damaging or burning out the activated carbon molded body.

(C) When the shielding material contains at least one of an alkali metal compound and an alkaline earth metal compound, the harmful gas discharged from the activated carbon molded body by firing is reduced by the metal compound. Since it is detoxified by the reaction, the emission of harmful gas generated from the activated carbon molded body by firing can be easily reduced without separately requiring exhaust gas treatment.

(D) When the activated carbon molded body and the shielding material are housed in a heat-resistant container and the activated carbon molded body is embedded in the shielding material, the contact between the activated carbon molded body and the surrounding oxygen can be simplified. By simply preparing a heat-resistant container, it can be shut off reliably and the heat conduction efficiency is good, so that it can be implemented at low cost. Further, since the activated carbon molded body is embedded in the shielding material, the activated carbon molded body is less likely to receive an external force, and the activated carbon molded body can be easily handled in a state of being housed in the heat-resistant container. In this case, if the shielding material contains an alkali metal compound or an alkaline earth metal compound, the harmful gas generated from the activated carbon molded body by firing can be more reliably made harmless.

(E) The inner heat-resistant container is disposed inside the outer heat-resistant container, the activated carbon molded body is accommodated in the inner heat-resistant container, and the shielding material is filled between the outer heat-resistant container and the inner heat-resistant container. In this case, the shielding material can be arranged separately from the activated carbon molded body, and it is not necessary to remove the shielding material from the surface of the activated carbon molded body after firing, so that the handling of the activated carbon molded body after firing can be simplified. .

(F) When the used activated carbon molded body used for the adsorption is preliminarily washed and then fired, the used activated carbon molded body can be regenerated more favorably.

(G) After the activated carbon compact is preheated at 400 ° C. or lower, it is fired at 400 to 1000 ° C.
When the temperature is gradually cooled to not more than ° C., since the activated carbon molded body does not undergo a rapid temperature change, it is possible to prevent a decrease in strength or damage due to firing of the activated carbon molded body.

(H) When the heat-resistant container accommodating the activated carbon molded body is placed on the moving means, and the moving means is moved in the tunnel kiln, the activated carbon molded body is fired. The sintering process can be performed continuously without giving a temperature change, and the process can be performed efficiently and inexpensively.

[Brief description of the drawings]

FIG. 1 is a cutaway perspective view of a heat-resistant container showing a state in which an activated carbon molded body and a shielding material are housed in a first embodiment of the present invention.

FIG. 2 is Comparative Table 1 showing firing results of Examples 1 to 6 of the first embodiment.

FIG. 3 is Comparative Table 2 showing firing results of Examples 7 to 9 of the second embodiment.

FIG. 4 is a cutaway perspective view showing a state in which an activated carbon molded body and a shielding material are accommodated in a heat-resistant container according to a fourth embodiment.

FIG. 5 is a schematic explanatory view of a tunnel kiln used in a fifth embodiment.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1: activated carbon molded body (honeycomb activated carbon, sheet activated carbon), 2: heat resistant container, 3: shielding material, 5: outer heat resistant container, 6: inner heat resistant container, 7: tunnel kiln, 11: moving means (trolley).

Claims (9)

[Claims] A shielding material (3) containing a carbonaceous material is arranged around an activated carbon molded body (1) to block contact between said activated carbon molded body (1) and surrounding oxygen. A method for firing an activated carbon molded body, wherein (1) is fired at 400 to 1000 ° C. 2. The method for firing an activated carbon molded body according to claim 1, wherein the shielding material (3) contains at least one of an alkali metal compound and an alkaline earth metal compound. 3. The alkali metal or alkaline earth metal is at least one of potassium, sodium, calcium, and magnesium, and these compounds are one of carbonates, bicarbonates, oxides, and hydroxides. The method for firing an activated carbon molded body according to claim 2, wherein the method is selected from the above. 4. The method according to claim 1, wherein the carbonaceous material is activated carbon, coke,
4. The composition according to claim 1, wherein the main component is at least one of charcoal, anthracite, ash, and carbon black.
The method for firing an activated carbon molded article according to any one of the above. 5. The activated carbon molded body (1) and the shielding material (3) are housed in a heat-resistant container (2), and the activated carbon molded body is placed in the shielding material (3).
The method for firing an activated carbon molded body according to any one of claims 1 to 4, wherein (1) is embedded. 6. An inner heat-resistant container inside an outer heat-resistant container (5).
(6) is disposed, the activated carbon molded body (1) is accommodated in the inner heat-resistant container (6), and the shielding material (3) is placed in the outer heat-resistant container (5).
5. Filling between the inner heat-resistant container (6) and the inner heat-resistant container (6).
The method for firing an activated carbon molded article according to any one of the above. 7. A used activated carbon compact used for adsorption
The firing method for an activated carbon molded body according to any one of claims 1 to 6, wherein (1) is preliminarily washed and then fired. 8. The activated carbon compact (1) is preheated at 400 ° C. or lower, and then calcined at 400 to 1000 ° C.
The method for firing an activated carbon molded body according to any one of claims 1 to 7, wherein the activated carbon molded body is gradually cooled to a temperature of not more than ° C. 9. A heat-resistant container containing an activated carbon molded body (1).
(2.5.6) is placed on the moving means (11), and the moving means (1
9. The method for firing an activated carbon molded body according to claim 8, wherein the activated carbon molded body (1) is fired by moving 1) in a tunnel kiln (7).