JP4124382B2 - Adsorbent adsorbent combustion equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for burning an adsorbent packed in a column and adsorbing a predetermined component in a liquid to be treated.
[0002]
[Prior art]
As a processing apparatus for processing a liquid to be processed, an apparatus for adsorbing a predetermined component in the liquid to be processed to an adsorbent is known. In general, such an apparatus fills a column consisting of a vertically long cylinder with an adsorbent, and allows the liquid to be treated to flow into the column from the lower part or the upper part. It is made to adsorb | suck to this adsorbent. The adsorbent after adsorbing a predetermined element is taken out of the column and processed. Conventionally, a method of obtaining a predetermined component as an oxide from such an adsorbed adsorbent is a method in which an eluent is passed through the adsorbent to separate and recover only the predetermined component in an aqueous solution, and this aqueous solution is dried or precipitated. There are known a method of performing thermal oxidation later with an electric furnace or the like, and a method of extracting the adsorbent from the inside of the column and placing it in an open boat dish or the like and performing thermal oxidation in an oxidizing atmosphere.
[0003]
On the other hand, various adsorbents have been proposed depending on the type of liquid to be treated, and in particular, as an adsorbent that adsorbs metal elements such as actinoid elements, tannins based on tannin extracted from natural products are used. Adsorbents are known (JP-A-5-50058, JP-A-5-66291). Since this tannin-based adsorbent uses many tannins extracted from natural products such as persimmon astringents, it is possible to make effective use of resources, and this tannin is inexpensive and easy to obtain. Therefore, it has the advantage that it is suitable for mass production and has great economic effects. Tannin is composed of oxygen, carbon, and hydrogen, and the tannin burns completely when incinerated and can be incinerated without generating toxic gas. Therefore, the tannin-based adsorbent can greatly reduce the volume of the adsorbent by incineration and reduce the amount of solid waste generated. Further, depending on the adsorbed metal element, the solid matter becomes a metal oxide containing no impurities, and can be reused.
[0004]
[Problems to be solved by the invention]
However, even when a flammable adsorbent such as the above-described tannin-based adsorbent is used as the adsorbent, the treatment of the adsorbed adsorbent can be separated and recovered in the aqueous solution as in the past. In addition to the operation of drying or precipitating the material, it is necessary to carry out heat oxidation with an electric furnace or the like, so that the workability is poor and the amount of waste liquid accompanying the work is relatively large. In addition, the method of incinerating the adsorbent with a boat dish or the like requires the operation of extracting the adsorbent from the inside of the column, and there is a problem that the workability is lacking. There is also a risk that objects will be scattered in the exhaust treatment system.
An object of the present invention is to provide a combustion apparatus for an adsorbed adsorbent that can easily reduce the volume of the adsorbed adsorbent and can easily recover the target element adsorbed on the adsorbent in the form of an oxide. .
[0005]
[Means for Solving the Problems]
The invention according to claim 1 includes a combustible adsorbent 12 having a bottom 11a formed of a porous heat-resistant material capable of passing liquid and adsorbing predetermined components in the liquid to be treated, as shown in FIG. Heat-resistant interior container 11 filled with liquid, lid 13 formed of a porous heat-resistant material capable of passing the liquid that seals interior container 11, and interior container 11 are detachably accommodated and the liquid to be processed passes. The adsorbent adsorbent combustion apparatus includes a heat-resistant column 14 that can be formed and a heater 16 that is provided around the column 14 and burns the adsorbent 12 after adsorption.
By providing a heater 16 around the column 14, the adsorbent 12 can be combusted inside the column 14. By providing the inner container 11 capable of being filled with the adsorbent 12 in the column 14, handling of the oxide after combustion of the adsorbent 12 is facilitated. By providing a lid 13 formed of a porous heat-resistant material that can pass liquid that seals the interior container 11, the target oxide to be reused when the adsorbent 12 is heated and oxidized by the heater 16 is used. Prevent scattering to the disposal system.
[0006]
The invention according to claim 2 is the invention according to claim 1, wherein the inlet 14 e formed at the lower part of the heat-resistant column 14 for introducing the liquid to be processed and the upper edge formed at the upper edge of the heat-resistant column 14. 1 flange 14a, a second flange 11c formed on the outer edge of the upper end of the interior container and disposed on the first flange 14a, and a third flange 17a disposed on the second flange 11c on the outer edge of the upper end, and a lid on the lower end An inner cylinder 17 to which the body 13 is attached, and an upper lid 19 which is disposed on a third flange 17a superimposed on the first flange 14a via the second flange 11c and has a discharge port 19a for discharging the liquid to be treated. The adsorbent adsorbent combustion apparatus includes fastening means 22 and 23 for fastening the first, second, and third flanges 14a, 11c, and 17a and the upper lid 19 in an airtight manner.
[0007]
By attaching the lid 13 to the lower end of the inner cylinder 17, when the inner cylinder 17 is inserted into the interior container 11, the lid 13 enters the interior container 11 and the combustible adsorbent 12 filled in the interior container 11 is the other. To prevent it from diffusing.
A first flange 14a, a second flange 11c, and a third flange 17a are formed in the heat-resistant column 14, the interior container 11, and the inner cylinder 17, and the first, second, and third flanges 14a, 11c, and 17a and the upper lid 19 are formed. By fastening airtightly by the fastening means 22, 23, the inner container 11 can be detached from the column 14, and the handling of the oxide after the combustion of the adsorbent 12 and the filling of the new adsorbent are facilitated.
[0008]
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the adsorbent adsorbent in which the refrigerant flow path 27 for cooling the column 14 is formed around each of the upper part and the lower part of the heat resistant column 14 is provided. It is a combustion device.
By causing the refrigerant to flow through the refrigerant flow path 27 when the heater 16 heats the adsorbent 12, heat from the heater 16 is prevented from being transmitted to other parts than the adsorbent 12.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1 and FIG. 2, the adsorbent combustion apparatus 10 is filled with a heat-resistant interior container 11 having a bottom 11 a formed of a porous heat-resistant material that can be passed, and a combustible adsorbent 12. A lid 13 for sealing the interior container 11, a heat-resistant column 14 that accommodates the interior container 11 in a removable manner, and a heater 16. The column 14 is formed in a cylindrical shape, an introduction port 14e for introducing a liquid to be treated is formed in the lower part, and a first flange 14a is integrally formed on the outer edge of the upper end. The column 14 is formed so that the liquid to be processed can pass through the column 14 by introducing the liquid to be processed from the introduction port 14 e.
[0010]
The internal container 11 has a cylindrical body that has an outer diameter that can be inserted into the column 14 with a slight gap and is shorter than the column 14. The inner container 11 can be passed through the lower end and can pass the metal oxide element. A bottom portion 11a formed of a porous heat resistant material having a plurality of holes is provided. A second flange 11c having the same shape and the same size as the first flange 14a is formed on the outer edge of the upper end of the interior container 11, and the second flange 11c is disposed on the first flange 14a when the interior container 11 is accommodated in the column 14. Configured to do.
[0011]
The lid 13 is formed of a porous heat-resistant material that can be passed through like the bottom portion 11a and has a hole with a size that prevents the passage of metal oxide elements, and can be inserted into the interior container 11 with a slight gap. It is attached to the lower end of the inner cylinder 17 having a different outer diameter. The inner cylinder 17 is a cylindrical body shorter than the inner container 11, and a third flange 17 a having the same shape and size as the second flange 11 c is formed on the outer edge of the upper end of the inner cylinder 17. The third flange 17a is configured to be disposed on the second flange 11c when the inner cylinder 17 is inserted into the interior container 11. The inner cylinder 17, the heat-resistant interior container 11 and the heat-resistant column 14 are each made of a metal having strength at high temperatures and having oxidation resistance. Examples of such metals include stainless steel and nickel alloys.
[0012]
A female screw 11b is formed on the second flange 11c of the heat-resistant interior container 11, and a mounting hole 17b and a counterbore 17c larger in diameter than the mounting hole 17b are formed on the same axis at a position corresponding to the female screw 11b of the third flange 17a. Is done. The internal container 11 and the inner cylinder 17 are fixed by inserting the male screw 18 into the mounting hole 17b and screwing into the female screw 11b in a state where the inner cylinder 17 is inserted into the inner container 11, and the lid 13 is placed inside the inner container 11. The combustible adsorbent 12 that enters and fills the interior container 11 is prevented from diffusing to other parts, and the combustible adsorbent 12 is sealed inside the interior container 11.
[0013]
When the inner container 11 with the inner cylinder 17 fixed is inserted into the column 14, the third flange 17a is superimposed on the first flange 14a via the second flange 11c, and an upper lid 19 is further placed on the third flange 17a. Be placed. A discharge port 19a for discharging the liquid to be processed is formed in the central portion of the upper lid 19, and the first, second and second circumferential surfaces are respectively formed on the upper surfaces of the first, second and third flanges 11c, 14a and 17a. Three concave grooves 11d, 14c, and 17b are formed, and the first, second, and third flanges 11c, 14a, and 17a and the upper cover 19 are heavy through the packing (not shown) accommodated in the respective concave grooves 11d, 14c, and 17b. Configured to be compatible.
[0014]
The first, second, and third flanges 11c, 14a, and 17a and the upper lid 19 are coaxially penetrated to form fastening holes 11e, 14d, 17e, and 19b, respectively. The fastening holes 11e, 14d, 17e, and The first, second, and third flanges 11c, 14a, 17a, which are overlapped by inserting a fastening screw 22 as fastening means from the upper lid 19 side into the 19b and screwing the nut 23 from the first flange 14a side, and The upper lid 19 is fastened in an airtight manner.
The heater 16 is provided around the column 14 corresponding to the adsorbent 12, and a refrigerant flow path 27 to which a refrigerant introduction pipe 24 and a refrigerant discharge pipe 26 are connected is formed around each of the upper part and the lower part of the column 14. The The heater 16 is configured to burn the adsorbent 12 by heating the adsorbent 12 and to prevent the heat from being transmitted to other portions by circulating the refrigerant through the refrigerant flow path 27. .
[0015]
In the thus configured adsorbent adsorbent combustion apparatus, adsorption of predetermined components in the liquid to be treated to the adsorbent 12 is first formed at the bottom of the heat-resistant column 14 as shown by the solid line arrow in FIG. The liquid to be processed is caused to flow from the introduced inlet 14e. The liquid to be treated that has flowed from the introduction port 14 e enters the inside of the column 14 from below, passes through the bottom 11 a provided at the lower part of the heat-resistant interior container 11, and reaches the adsorbent 12. By the flow of the liquid to be treated into the adsorbent 12, predetermined elements inside the liquid to be treated are adsorbed by the adsorbent 12, and the liquid to be treated is processed. The liquid to be processed that has been processed passes through the lid 13 and enters the inner cylinder 17, and the liquid to be processed that has entered the inner cylinder 17 is discharged from the outlet 19 a of the upper lid 19 to the outside.
[0016]
When a predetermined amount of element is adsorbed on the adsorbent 12 and the adsorbent 12 needs to be processed, the inflow of the liquid to be treated from the inlet 14e is once stopped, as indicated by the broken line arrow in the figure, Air is circulated into the column 14 from the outlet 19a of the upper lid 19 in the direction opposite to the direction in which the liquid to be processed is circulated, and the heater 16 is turned on to heat the adsorbent 12. The heating temperature of the adsorbent 12 by the heater 16 is appropriately determined depending on the type of the adsorbent 12, but when the adsorbent 12 is a tannin-based adsorbent, it is necessary to heat the adsorbent 12 to at least 600 ° C. or more. It is. By the heating by the heater 16, the adsorbent 12 reacts with oxygen in the air flowing inside the column 14 and burns.
[0017]
The adsorbent 12 is reduced in volume by combustion, and the elements adsorbed on the adsorbent 12 remain as oxides. In this case, since the bottom 11a and the lid 13 are formed of a porous heat-resistant material having pores having a size that prevents the passage of the metal oxide element, the oxide element is disposed of together with the air flowing inside the column 14. The target oxide does not scatter in the system and effectively remains in the interior container 11. In particular, if the adsorbent 12 is a tannin-based adsorbent, it is completely burned by this combustion and incinerated without generating toxic gas, and only the adsorbed elements remain in the interior container 11 as oxides.
[0018]
When the combustion of the adsorbent 12 is completed, the oxide remaining in the interior container 11 is recovered. As shown in FIG. 2, the oxide is recovered by releasing the fastening by the fastening screw 22, removing the upper lid 19, and taking out the inner container 11 from the column 14 as indicated by the broken line arrow in the figure. In this case, in order to prevent the heat of the heater 16 from being transferred to other parts than the adsorbent 12, if the heater 16 circulates the refrigerant in the refrigerant passage 27 when the adsorbent 12 is heated, The operation of taking out the inner container 11 from the column 14 is relatively easy as compared with the case of handling the high temperature column 14. Next, after loosening the male screw 18 that fixes the inner container 11 and the inner cylinder 17 to release the fixing, the inner cylinder 17 is extracted from the inner container 11. The interior container 11 from which the inner cylinder 17 is extracted is reversed, and the oxide metal 28 remaining inside the interior container 11 is collected by gravity as indicated by the solid line arrow in the figure.
[0019]
【The invention's effect】
As described above, according to the present invention, since the heater is provided around the column, the adsorbent can be burned inside the column, and the adsorbent is filled in the interior container and provided in the column. The handling of the oxide after combustion of the adsorbent can be facilitated. As a result, the volume of the adsorbed adsorbent can be reduced easily, and the target element adsorbed on the adsorbent can be easily recovered in the form of an oxide.
In addition, the first flange, the second flange, and the third flange are formed in the heat-resistant column, the interior container, and the inner cylinder, and the first, second, and third flanges and the upper lid are fastened in an airtight manner by fastening means. If the inner container can be detached from the column simply by releasing the fastening by means, and if the heater circulates the refrigerant in the refrigerant flow path when heating the adsorbent, the heat from the heater will be other than the adsorbent. To prevent transmission to the part.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a combustion apparatus for adsorbed adsorbent according to the present invention.
FIG. 2 is a configuration diagram showing a state in which oxide is recovered from the apparatus.
[Explanation of symbols]
11 heat-resistant interior container 11a bottom 11c second flange 12 combustible adsorbent 13 lid 14 heat-resistant column 14a first flange 14e inlet 16 heater 17 inner cylinder 17a third flange 19 upper lid 19a outlet 22 fastening screw (fastening) means)
23 Nut (fastening means)
27 Refrigerant flow path

Claims (3)

A heat-resistant interior container (11) having a bottom part (11a) formed of a porous heat-resistant material that can be passed and filled with a combustible adsorbent (12) that adsorbs a predetermined component in the liquid to be treated When,
A lid (13) formed of a porous heat-resistant material capable of passing liquid that seals the interior container (11);
A heat-resistant column (14) formed so that the inner container (11) can be removed and the liquid to be treated can pass through;
A combustion apparatus for adsorbed adsorbent, comprising a heater (16) provided around the column (14) and combusting the adsorbent (12) after adsorption. An inlet (14e) that is formed at the bottom of the heat-resistant column (14) and introduces a liquid to be treated;
A first flange (14a) formed on the outer edge of the upper end of the heat-resistant column (14);
A second flange (11c) formed on an upper edge of the inner container and disposed on the first flange (14a);
An inner cylinder (17) in which a third flange (17a) disposed on the second flange (11c) is formed on the outer edge of the upper end and a lid (13) is attached to the lower end;
An upper lid (19a) formed on a third flange (17a) superimposed on the first flange (14a) via the second flange (11c) and having a discharge port (19a) for discharging the liquid to be treated. )When,
The adsorbent adsorbent according to claim 1, further comprising fastening means (22, 23) for airtightly fastening the first, second and third flanges (14a, 11c, 17a) and the upper lid (19). Combustion device. The combustion apparatus for adsorbed adsorbent according to claim 1 or 2, wherein a refrigerant channel (27) for cooling the column (14) is formed around each of an upper portion and a lower portion of the heat resistant column (14).

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