JP2968412B2 - Activated carbon adsorption tower and method for replenishing the activated carbon - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an activated carbon adsorption tower and a method for replenishing the activated carbon.

[0002]

2. Description of the Related Art Conventionally, in performing wastewater treatment or water treatment, an activated carbon adsorption tower filled with granular activated carbon (10 tenths) for removing COD components and chromaticity components is provided. Supply undiluted solution before processing, COD
The components and chromaticity components are adsorbed by the activated carbon.

FIG. 2 is a sectional view of a conventional activated carbon adsorption tower. In the figure, reference numeral 11 denotes an adsorption tower main body having a diameter of 1 to 3.
[M] is a cylindrical body having a length of 5 to 14 [m]. Then, the whole inside of the adsorption tower main body 11 is filled with granular activated carbon 13. A stock solution inlet 14 is provided at a lower portion of the adsorption tower main body 11, and the stock solution is supplied by press-fitting into the adsorption tower body 11 through the stock solution inlet 14 through the inflow pipe 15.

[0004] The undiluted solution rises in the adsorption tower body 11 from the undiluted solution inlet 14, during which the activated carbon 13 causes C
OD components and chromaticity components are adsorbed. On the other hand, the adsorption tower body 1
A plurality of, for example, 6 to 8 wedge wire screens 17 as water collecting nozzles are arranged in a circle at the upper set position of 1, and the processing liquid is collected and discharged through the wedge wire screens 17. You can do it.
Then, the processing liquid is sent to another processing tank (not shown) via the outflow pipe 18.

If the adsorption capacity of the activated carbon 13 in the adsorption tower body 11 decreases, the COD component and the chromaticity component in the processing liquid discharged from the outflow pipe 18 increase. A part of the activated carbon 13 is extracted as waste carbon, and the same amount of activated carbon 13 is replenished as supplementary carbon. Therefore, a supplementary coal supply port 21 is provided at the upper end of the adsorption tower main body 11, and a waste coal discharge port 22 is provided at the lower end.

FIG. 3 is a detailed view showing an example of a wedge wire screen, and FIG. 4 is an enlarged view of the wedge wire screen of FIG. In the figure, 17 is a wedge wire screen, and 25 is a cylindrical pipe. An opening 27 is formed at one end of the pipe 25, a bottom portion 28 is formed at the other end, and a number of holes 26 are formed at the side surface. Further, a plurality of rods 30 are vertically mounted on the side surface of the pipe 25 so as to cover the entire circumference, and a wedge wire 31 is wound around the outside of the rod 30. The distance between the turns of the wedge wire 31, that is, the opening is set to, for example, 0.5 [mm].

[0007]

In the conventional activated carbon adsorption tower, however, it is necessary to use activated carbon having a small particle size in order to increase the adsorption speed. The wire screen 17 is clogged. Further, if the aperture is set small in order to prevent the clogging of the wedge wire screen 17, the pressure loss in the wedge wire screen 17 increases, and the processing ability of the stock solution decreases.

Further, since the wedge wire screen 17 is buried in the activated carbon 13, the area of the strainer is reduced and water is collected by points. Therefore, a short path occurs due to the flow of the undiluted solution in the adsorption tower body 11 only through the easy passage, and it is not possible to take a sufficient time for the undiluted solution to contact the activated carbon 13. The present invention solves the problems of the conventional activated carbon adsorption tower, prevents clogging of the water collecting nozzle, improves the stock solution treatment capacity, and makes the stock solution and activated carbon come into contact. An object of the present invention is to provide an activated carbon adsorption tower capable of taking a sufficient time and a method for replenishing the activated carbon.

[0009]

For this purpose, in the activated carbon adsorption tower according to the present invention, an adsorption tower main body, and a raw liquid inlet which is disposed below the adsorption tower main body and supplies a raw liquid into the adsorption tower main body, are provided. A water collecting nozzle disposed at an upper part of the main body of the adsorption tower for collecting and discharging the processing liquid. Then, an activated carbon layer and a filter material layer are formed in the main body of the adsorption tower. The activated carbon layer is made of activated carbon, and the filter medium layer is formed above the activated carbon layer by a filter medium having a specific gravity smaller than that of the stock solution and having an average particle size larger than the average particle size of the activated carbon. Cover the collecting nozzle.

A supplementary carbon supply port for supplementing activated carbon is provided at the upper end of the activated carbon layer in a steady state, and a waste coal discharge port for extracting a part of the activated carbon is provided at the lower end of the adsorption tower body. Will be arranged. In another activated carbon adsorption tower of the present invention, a backwash water discharge port is provided at an intermediate position on a side wall of the adsorption tower main body.

In the method for replenishing activated carbon in an activated carbon adsorption tower according to the present invention, an adsorption tower main body provided with a stock solution inlet at a lower portion and a water collecting nozzle at an upper portion is provided, and an activated carbon layer in the adsorption tower main body is provided. Above, it is applied to an activated carbon adsorption tower in which a filter medium layer is formed by a filter medium having a specific gravity smaller than that of a stock solution and an average particle diameter larger than the average particle diameter of activated carbon. Then, a part of the activated carbon is extracted from a waste coal discharge port provided at a lower end of the adsorption tower main body, and at least one of a stock solution and water is supplied into the adsorption tower main body to float the filter medium. The filter medium layer is formed, and activated carbon is replenished below the filter medium layer.

[0012]

According to the present invention, as described above, the activated carbon adsorption tower is provided with an adsorption tower main body, a raw material inlet provided at a lower portion of the adsorption tower main body for supplying a raw liquid into the adsorption tower main body, A water collecting nozzle is provided at an upper part of the tower main body and collects and discharges the processing liquid. Then, an activated carbon layer and a filter material layer are formed in the main body of the adsorption tower. The activated carbon layer is made of activated carbon, and the filter medium layer is formed above the activated carbon layer by a filter medium having a specific gravity smaller than that of the stock solution and having an average particle size larger than the average particle size of the activated carbon. Cover the collecting nozzle.

The undiluted solution is supplied into the adsorption tower main body through the undiluted liquid inlet and rises in the adsorption tower main body, during which the COD component and the chromaticity component are adsorbed by the activated carbon. Then, it is discharged from the water collecting nozzle as a processing liquid. Further, a supplementary carbon supply port for replenishing activated carbon is provided at the upper end of the activated carbon layer in a steady state, and a waste coal discharge port for extracting a part of the activated carbon is provided at a lower end of the adsorption tower body. You. Therefore, even if replenishment of the activated carbon is repeated, the specific gravity of the activated carbon is larger than that of the stock solution, and the specific gravity of the filter material is smaller than the stock solution, so that the positions of the activated carbon and the filter material do not reverse.

In another activated carbon adsorption tower according to the present invention, a backwash water discharge port is provided at an intermediate position on a side wall of the adsorption tower main body. Therefore, a part of the activated carbon is extracted from the waste carbon discharge port, the upper end surface of the activated carbon layer is positioned below the backwash water discharge port, and industrial water is supplied from the water collection nozzle into the main body of the adsorption tower to remove the filter material. Can be washed. Then, the backwash water after washing is discharged from the backwash water outlet.

In the method for replenishing activated carbon of an activated carbon adsorption tower according to the present invention, an adsorption tower main body provided with a stock solution inlet at a lower portion and a water collecting nozzle at an upper portion is provided. Above, it is applied to an activated carbon adsorption tower in which a filter medium layer is formed by a filter medium having a specific gravity smaller than that of a stock solution and an average particle diameter larger than the average particle diameter of activated carbon. Then, a part of the activated carbon is extracted from a waste coal discharge port provided at a lower end of the adsorption tower main body, and at least one of a stock solution and water is supplied into the adsorption tower main body to float the filter medium. The filter medium layer is formed, and activated carbon is replenished below the filter medium layer. In this case, since the specific gravity of the filter medium is smaller than that of the stock solution, the filter medium floats in the main body of the adsorption tower to form a filter medium layer. Therefore, the inside of the adsorption tower main body can be brought into a steady state by replenishing the activated carbon between the filter medium layer and the activated carbon layer.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of an activated carbon adsorption tower showing an embodiment of the present invention. In the figure, reference numeral 41 denotes an adsorption tower main body, having a diameter of 1 to 3 [m] and a length of 5 to 14 [m].
Consisting of a cylindrical body. Almost the entire inside of the adsorption tower main body 41 is filled with granular activated carbon 42 having an average particle size of 0.5 to 0.6 [mm], and an activated carbon layer 43 is formed.

Then, a filter material layer 44 is formed above the activated carbon layer 43 in the adsorption tower main body 41. The filter medium layer 44 is formed by filling a filter medium 45 having a specific gravity smaller than a stock solution, preferably smaller than water, by about 1 m above the activated carbon layer 43. The filter material 45 has an average particle size of 0.5 to 5 [mm], and is set so as to be larger than the average particle size of the activated carbon 42 and not more than 10 times. As a material of the filter medium 45, polypropylene, polyurethane foam, styrene foam, polyethylene, or the like is used.

A stock solution inlet 14 is provided at a lower portion of the adsorption tower main body 41, and the stock solution is supplied into the adsorption tower body 41 by press-fitting through the stock solution inlet 14 through the inflow pipe 15. Then, the undiluted solution rises in the adsorption tower main body 41 from the undiluted solution inlet 14, and during this time, the activated carbon 42 causes CO 2
D component and chromaticity component are adsorbed. On the other hand, the adsorption tower body 41
In the upper set position, a plurality of, for example, 6 to 8 wedge wire screens as water collecting nozzles are arranged in a circle in the filter medium layer 44, and the processing liquid is passed through the wedge wire screen 17. Water can be collected and discharged. Then, the processing liquid is sent to another processing tank (not shown) via the outflow pipe 18.

If the adsorption capacity of the activated carbon 42 in the adsorption tower main body 41 is reduced, the COD component and the chromaticity component in the processing liquid discharged from the outlet pipe 18 are increased. A part of the activated carbon 42 is extracted as waste coal, and the same amount of activated carbon 42 is replenished as supplementary carbon. Therefore, a supplementary carbon supply port 21 is provided in the adsorption tower main body 41, and a waste coal discharge port 22 is provided at the lower end of the adsorption tower main body 41. Replenish a small amount at a time.

When replenishing the activated carbon 42, first, a part of the activated carbon 42 is extracted from the waste coal discharge port 22.
Along with this, since the filter medium layer 44 moves downward together with the activated carbon layer 43, the stock solution is supplied from the stock solution inlet 14. At this time, since the specific gravity of the filter medium 45 is smaller than the stock solution, the filter medium 45 floats in the adsorption tower main body 41 to form a filter medium layer 44 on the upper part. Therefore, an undiluted solution layer without the activated carbon 42 is formed between the filter medium layer 44 and the activated carbon layer 43 moved downward.

Subsequently, the activated carbon 42 is supplied to the supplementary carbon supply port 2.
When the stock solution layer is replenished from 1, the activated carbon layer 43 is formed below the filter medium layer 44, and the state becomes a steady state. In this case, the supplementary charcoal supply port 21 is controlled so that the activated carbon 42 supplemented from the supplementary carbon supply port 21 does not mix with the filter material 45.
Are located above the activated carbon layer 43 in the steady state, and open into the activated carbon layer 43.

Thus, even if the replenishment of the activated carbon 42 is repeated, the specific gravity of the activated carbon 42 is larger than that of the undiluted solution, and the specific gravity of the filter material 45 is smaller than the undiluted solution. There is no. In the activated carbon adsorption tower having the above configuration, the filter material layer 4
4 is formed, and the wedge wire screen 17 is covered with the filter medium layer 44.
No clogging occurs in the wedge wire screen 17 even when the wedge wire screen 2 is used.

Therefore, the adsorption speed can be increased, and the activated carbon adsorption tower can be downsized. In addition, since the aperture of the wedge wire screen 17 is set to be large and the pressure loss in the wedge wire screen 17 can be reduced, the processing ability of the stock solution can be improved. Further, since the wedge wire screen 17 is buried in the filter medium layer 44, the area of the strainer is increased, and water is collected by the surface. Therefore, the stock solution in the adsorption tower body 41 flows uniformly upward, so that a short path does not occur, and the stock solution and the activated carbon 42
Can take sufficient time to contact.

When the activated carbon adsorption tower having the above-mentioned structure is used for a long period of time, the filter medium layer 44 may be clogged. Therefore, the filter medium 45 can be periodically cleaned. Therefore, a backwash water discharge port is provided at an intermediate position of the side wall of the adsorption tower main body 41, and the outlet pipe 18 can be connected to an industrial water supply source (not shown).

FIG. 5 is a diagram showing a state of cleaning the filter medium in the embodiment of the present invention. In the figure, 17 is a wedge wire screen, 18 is an outflow pipe, 22 is a waste coal outlet, 4
1 is an adsorption tower main body, 42 is activated carbon, 45 is a filter material, and 51 is a backwash water discharge port. When washing the filter medium 45,
First, a part of the activated carbon 42 is extracted from the waste coal discharge port 22, and the upper end surface of the activated carbon layer 43 (FIG. 1) is positioned below the backwash water discharge port 51. At this time, the filter medium layer 44 moves downward together with the activated carbon layer 43, and industrial water is supplied into the adsorption tower main body 41 through the outflow pipe 18 and the wedge wire screen 17.

By doing so, the filter medium 45 expands downward and increases the volume of the filter medium layer 44 by about 20%. Then, the filter medium 45 is washed in this state, and the backwash water after the washing is discharged from the backwash water discharge port 51 through the backwash water discharge pipe 52. In this embodiment, the activated carbon adsorption tower is used for removing the COD component and the chromaticity component, but it can be used for decolorizing sugar and glutamine soda.

The present invention is not limited to the above embodiment, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention.

[0028]

As described above in detail, according to the present invention, the activated carbon adsorption tower is provided with an adsorption tower main body and a raw liquid stream which is disposed below the adsorption tower main body and supplies the raw liquid into the adsorption tower main body. An inlet and a water collecting nozzle disposed at an upper part of the main body of the adsorption tower for collecting and discharging the processing liquid.

An activated carbon layer and a filter material layer are formed in the main body of the adsorption tower. The activated carbon layer is made of activated carbon, and the filter medium layer is formed above the activated carbon layer by a filter medium having a specific gravity smaller than that of the stock solution and having an average particle size larger than the average particle size of the activated carbon. Cover the collecting nozzle. Further, a supplementary carbon supply port for supplementing activated carbon is provided at the upper end of the activated carbon layer in a steady state, and a waste coal discharge port for extracting a part of the activated carbon is provided at the lower end of the adsorption tower main body. You.

Therefore, since the water collecting nozzle is covered with the filter medium layer, the water collecting nozzle is not clogged even if activated carbon having a small particle size is used. As a result, the adsorption speed can be increased, and the activated carbon adsorption tower can be downsized. Further, since the aperture of the water collecting nozzle is set to be large and the pressure loss at the water collecting nozzle can be reduced, the processing ability of the stock solution can be improved.

Further, since the structure is such that the water collecting nozzle is buried in the filter medium layer, the area of the strainer becomes large and water is collected by the surface. In this case, since the stock solution in the adsorption tower body flows uniformly upward, a short path does not occur, and a sufficient time can be taken for the stock solution and activated carbon to come into contact. In another activated carbon adsorption tower of the present invention, a backwash water discharge port is provided at an intermediate position on a side wall of the adsorption tower main body. Therefore, it is possible to prevent the filter medium layer from being blocked by washing the filter medium.

In the method for replenishing activated carbon of an activated carbon adsorption tower according to the present invention, an adsorption tower body provided with a stock solution inlet at a lower portion and a water collecting nozzle at an upper portion is provided, and an activated carbon layer in the adsorption tower body is provided. Above, it is applied to an activated carbon adsorption tower in which a filter medium layer is formed by a filter medium having a specific gravity smaller than that of a stock solution and an average particle diameter larger than the average particle diameter of activated carbon. Then, a part of the activated carbon is extracted from a waste coal discharge port provided at a lower end of the adsorption tower main body, and at least one of a stock solution and water is supplied into the adsorption tower main body to float the filter medium. The filter medium layer is formed, and activated carbon is replenished below the filter medium layer.

In this case, since the inside of the absorbent body can be brought into a steady state by replenishing the activated carbon between the filter medium layer and the activated carbon layer, the positions of the activated carbon and the filter medium do not reverse.

[Brief description of the drawings]

FIG. 1 is a sectional view of an activated carbon adsorption tower showing an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional activated carbon adsorption tower.

FIG. 3 is a detailed view showing an example of a wedge wire screen.

FIG. 4 is an enlarged view of the wedge wire screen of FIG. 3;

FIG. 5 is a diagram showing a state of cleaning a filter medium in an example of the present invention.

[Explanation of symbols]

 14 Stock solution inlet 17 Wedge wire screen 21 Supplementary charcoal supply port 22 Waste coal discharge port 41 Adsorption tower main body 42 Activated carbon 43 Activated carbon layer 44 Filter material layer 45 Filter material 51 Backwash water discharge port

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Mitsuo Sato 63-30 Yuigaoka, Hiratsuka-shi, Kanagawa Prefecture Sumitomo Heavy Industries, Ltd. Inside the Hiratsuka Research Laboratory (56) References Japanese Utility Model 63-118912 (JP, U) ) Jpn. 4-122603 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) C02F 1/28 B01D 29/08 B01D 23/10

Claims (3)

(57) [Claims] 1. An adsorption tower main body, (b) a raw material inlet provided at a lower part of the adsorption tower main body and supplying a raw liquid into the adsorption tower main body, and (c) an upper part of the adsorption tower main body. A water collecting nozzle for collecting and discharging the processing liquid; (d) an activated carbon layer formed of activated carbon in the main body of the adsorption tower; and (e) a specific gravity smaller than that of the undiluted solution, (F) a filter material layer formed above the activated carbon layer in the adsorption tower body and covering the water collecting nozzle in a steady state by a filter material having a diameter larger than the average particle size of the activated carbon; is disposed at the upper end, characterized a refill coal supply port for replenishing the active carbon, to have a (g) said disposed at the lower end of the adsorption tower body, waste coal outlet for withdrawing a portion of the activated carbon Activated carbon adsorption tower. 2. The activated carbon adsorption tower according to claim 1, wherein a backwash water discharge port is provided at an intermediate position of a side wall of the adsorption tower main body. 3. A stock solution inlet at the lower part and a water collecting nozzle at the upper part.
There comprising an adsorption tower body disposed respectively above the contact Keru active carbon layer in the adsorption tower body, the specific gravity is smaller than stock,
A method for replenishing activated carbon in an activated carbon adsorption tower in which a filter medium layer is formed by a filter medium having an average particle diameter larger than the average particle diameter of activated carbon, comprising: (a) a waste disposed at a lower end of the adsorption tower main body; extracting a portion of the activated carbon from coal outlet, (b) the supplying at least one of the stock solution and water adsorption tower body is floated said filter media to form the filter medium layer, (c) A method for replenishing activated carbon in an activated carbon adsorption tower, comprising replenishing activated carbon below the filter material layer.