JP3710614B2 - Liquid processing tower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid treatment tower for treating a liquid by passing it through a tower filled with a liquid treatment material such as an ion exchange resin, granular activated carbon, various adsorbents and filter materials.
[0002]
[Prior art]
For example, in the field of liquid treatment such as ion exchange treatment towers and filtration treatment towers using granular activated carbon, an example in which an ion exchange resin or liquid treatment material such as activated carbon is filled in the tower is used industrially. Very many.
[0003]
4 and 5 are both schematic views showing a lower structure of a conventional liquid processing tower, FIG. 4 shows a grid structure, and FIG. 5 shows a support floor structure.
First, the plate structure is provided with a flange portion 21 in the lower part of the processing tower body 20,
A support member constituted by sandwiching both sides of a Saran (registered trademark) cloth 22 with porous plates 23 and 23 is fixed by the flange portion 21, and a liquid such as an ion exchange resin or granular activated carbon is formed on the upper surface of the upper porous plate 23. The treatment material 24 is placed thereon.
[0004]
The support floor structure shown in FIG. 5 is mainly used as an ion exchange tower for the production of pure water, and a granular material such as a meteorite alone or a mixture of a granular material such as a meteorite and a curable resin is treated. The lower part in the tower body 20 is filled to form a support bed 25 having a continuous void smaller than the particle size of the liquid treatment material 24 between the granular materials, and an ion exchange resin or granular activated carbon is formed on the upper surface of the support bed 25. In this structure, a regenerant distributor 26 for regenerating the liquid processing material 24 is piped in the support floor 25.
[0005]
[Problems to be solved by the invention]
As described above, conventionally, as the support structure of the liquid processing material in the processing tower, the main plate method and the porous support bed method have been adopted.
However, in the case of the plate type, the strength is not sufficient as a support structure for the liquid treatment material, so in practice it requires considerable reinforcement. In addition to increasing the cost, such as sandwiching the sheet with a perforated plate, the replacement of the saran cloth becomes a large-scale and requires a lot of trouble.
[0006]
In addition, the porous support bed type can solve the above-mentioned drawbacks due to the eyeplate structure to some extent, but because the regenerant distributor for regenerating the liquid treatment material is piped in the support bed, There is a problem that the regenerative agent tends to stay at the bottom of the treatment tower body during the regeneration of the treatment material, and there is a problem that not all of the regenerant used is used effectively, and it is a great deal for washing out the regenerant remaining at the bottom. There is a disadvantage that it requires cleaning time and cleaning water. In addition, the support floor structure has a problem that clogging and cracking occur over time.
[0007]
In addition to the above, in both conventional structures, a portion that cannot be filled with a liquid processing material is formed in the lower part of the processing tower body, so that a large processing tower can be used to process the same amount of liquid to be processed. There is a problem that it becomes necessary.
[0008]
Furthermore, in a mixed bed type ion exchange tower, which is a kind of ion exchange treatment tower, the liquid to be treated is mixed with the cation exchange resin and the anion exchange resin that are filled therein almost uniformly when the liquid is passed. The two ion exchange resins are separated into two layers due to the difference in specific gravity by allowing the backwash water to flow from the bottom of the tower and performing so-called backwashing at the time of regeneration, and then each of the ion exchange resin layers has a different regenerant. It is necessary to regenerate each ion exchange resin by passing through the medicine, but in the case of the conventional eye plate method or support floor method, it exists in the corner where the eye plate or support floor contacts the tower body during backwashing. The mixed ion exchange resin hardly fluidizes. Therefore, the separation of both ion exchange resins is incomplete in this part, and as a result, the purity of the treatment liquid deteriorates when the liquid is passed after the regeneration is completed. Cause.
[0009]
In the case of a sand filter or an activated carbon filter, when the differential pressure of the filtration tower reaches a predetermined value as the filtration progresses, turbid components captured inside the filtration layer are removed and removed by backwashing. However, even in such a processing tower, in the case of the conventional eyeplate method or the support floor method, the sand and activated carbon existing in the corners are hardly fluidized, so this portion is not cleaned. There is a problem of becoming sufficient.
[0010]
Therefore, the present invention eliminates the problems associated with the conventional eyeplate structure and support floor structure described above, and the liquid treatment material stays in the corner of the bottom of the tower body during separation or backwashing of the liquid treatment material. It is an object of the present invention to provide a liquid treatment tower that can prevent and efficiently separate and backwash liquid treatment materials.
[0011]
[Means for Solving the Problems]
The configuration of the present invention for achieving the above object will be described in detail. In the liquid processing tower for processing the liquid by passing it through the tower filled with the liquid processing material, inside the mirror part at the lower part of the tower main body. Independently bulging portions are formed so as to radiate from the central portion, and branch pipes having a large number of liquid passage holes or slits are arranged in the valleys formed between the bulging portions. In addition, the liquid processing material is filled up to the bottom of the tower body so as to cover the bulging portion and the branch pipe, and the treated liquid processed by the liquid processing material is passed through the through holes or slits of the branch pipe when liquid is passed. The backwash water is ejected into the tower body through the liquid passage hole or slit of the branch pipe at the time of backwashing, so that the support plate made of the eye plate or the porous body is unnecessary. It is a liquid processing tower.
[0012]
As described above, the liquid processing tower of the present invention forms a bulging portion so as to form a radial shape inside the mirror portion at the lower portion of the processing tower main body, and a branch pipe in each trough formed between the bulging portions. Therefore, when the backwash water is ejected from the branch pipe, the backwash water pushes up the liquid treatment material almost uniformly while hitting the side wall of the bulging portion, and thus adheres to the liquid treatment material. Sufficient turbid components can be washed out.
[0013]
Further, for example, in the case of the above mixed bed type ion exchange tower, since the resin at the bottom is pushed up as a turbulent flow by the backwash water jetting, it is possible to prevent the stagnation of the ion exchange resin as in the prior art. Separation of the ion exchange resin and the cation exchange resin is favorably performed, and the subsequent regeneration process can be smoothly performed.
[0014]
Further, unlike the conventional eye plate method and support floor method, a portion that cannot be filled with the liquid processing material is not formed in the lower portion of the processing tower body, and the liquid processing material is filled to the bottom of the processing tower body. Therefore, the required height of the tower body can be made lower than before to process the same amount of liquid to be treated, and the production cost is also lower than that of the faceplate and support floor structure. Therefore, it is possible to significantly reduce the cost, which is very advantageous economically.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a specific configuration of the liquid processing tower according to the present invention will be described in detail based on the illustrated embodiment.
1 is a schematic cross-sectional view showing an embodiment of the liquid processing tower of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 is a bulging portion formed in a mirror portion of the tower main body. It is a perspective view which shows an example.
[0016]
In the figure, reference numeral 1 denotes a processing tower main body, and 2 denotes a mirror part formed in a gently curved shape at the lower part of the processing tower main body 1. 3 is an inlet pipe for the liquid to be processed connected to the upper part of the processing tower body 1, 4 is a distribution for uniformly dispersing the liquid to be processed supplied into the processing tower body 1 through the inlet pipe 3 into the tower body 1. 5 and 5 are a backwash water inlet pipe and a treatment liquid outlet pipe.
[0017]
Reference numeral 6 denotes a bulging portion which is raised inside the mirror portion 2 so as to be radially independent from the central portion. The bulging portion 6 is formed in a radial shape from the central portion in the mirror portion 2 having a gently curved shape. Therefore, when viewed from a plane, the bulging portion 6 has a fan shape as shown in FIG. The portion 6 gradually increases as the distance from the center increases, and a valley portion 7 having a predetermined width is formed between the bulging portions 6 and 6.
In the illustrated embodiment, eight independent bulges 6, 6... Are formed, but the number of the bulges 6 formed may be increased or decreased as appropriate according to the size of the processing tower body 1. Needless to say, you can.
[0018]
When the entire processing tower body 1 is made of glass fiber reinforced plastic (FRP), the bulging portion 6 can be integrally formed at the same time as the processing tower body 1 is formed. A column is most preferred for the practice of the present invention.
However, the bulging part 6 separately molded may be attached to the FRP mirror part 2 by means such as welding or adhesion without being integrally molded, or separately in the steel mirror part 2. Of course, the produced steel plate bulge 6 may be attached by means such as welding.
[0019]
A branch pipe 8 is piped in a trough 7 formed between the bulging parts 6, and the liquid to be treated passes through the branch pipe 8, but a liquid such as an ion exchange resin or granular activated carbon. The treatment material 9 is formed with a large number of liquid passage holes or slits having a hole diameter that does not pass.
In addition, as for the formation position of the liquid flow hole etc. with respect to the branch pipe 8, it is good to make it sideways so that the backwash water discharged from the branch pipe 8 can go to the surrounding wall of the said bulging part 6 as shown in FIG. Of course, in addition to the horizontal direction, a liquid passage hole or the like may be formed on the entire peripheral surface of the branch pipe 8.
[0020]
Reference numeral 10 denotes a mother pipe of each branch pipe 8 described above, and the mother pipe 10 communicates with the backwash water inlet pipe / treatment liquid outlet pipe 5. In addition, 11 in the figure is a pump for pumping the liquid to be treated or backwash water into the treatment tower main body 1, 12 is an outlet pipe for backwash water connected to the top of the treatment tower main body 1, and 13 is an object to be treated. An open / close valve provided in the pipe of the liquid inlet pipe 3, 14 is an open / close valve provided in the pipe of the backwash water inlet pipe 5 connecting the pump 11 and the mother pipe 10, and 15 is a backwash water inlet pipe. It is an on-off valve attached to the combined treatment liquid outlet pipe 5.
[0021]
As described above, the present invention forms the bulging portions 6, 6... Independent from each other so as to radiate from the central portion inside the mirror portion 2 at the lower portion of the processing tower main body 1. In each valley 7, 7 ... formed between the parts 6, 6 ..., there are piped branch pipes 8, 8 ... in which a large number of liquid passage holes or slits are formed. The liquid treatment material 9 such as ion exchange resin or granular activated carbon can be filled up to the bottom of the mirror part 2 so as to cover the bulging parts 6, 6... And the branch pipes 8, 8.
[0022]
When the liquid treatment tower of the present invention is passed, the on-off valves 13 and 15 are opened, the on-off valve 14 is closed, and the pump 11 is operated. The liquid to be treated is dispersed in the processing tower body 1 through the inlet pipe 3 and through the distributor 4. When the liquid to be treated flows downward and flows through a layer of liquid treatment material 9 such as ion exchange resin or granular activated carbon, treatment such as ion exchange and adsorption is performed, and the treated liquid is branched into tubes 8, 8,. And the processing liquid outlet pipe 5 is used to move to the next processing step.
[0023]
Next, when the liquid treatment material 9 is backwashed, the on-off valves 13 and 15 are closed, and the on-off valve 14 and the on-off valve 16 attached to the outlet pipe 12 of the backwash water are opened, and then the pump 11 is operated. Backwash water is ejected from the liquid passage hole or slit of the branch pipe 8 through the backwash water inlet pipe 5 and hits the side wall of the bulging portion 6 to push up the liquid treatment material 9. It can wash out turbid substances.
[0024]
In the case of a mixed bed type ion exchange tower, the resin in the trough 7 is pushed up as a turbulent flow by the backwash water jetting, so that retention can be prevented, and the difference in specific gravity and the anion exchange resin Separation of the cation exchange resin is performed well.
The backwash water that has washed the liquid treatment material 9 is discharged outside the tower through the backwash water outlet pipe 12 connected to the top of the treatment tower body 1.
[0025]
【The invention's effect】
As described above, the liquid processing tower of the present invention forms several bulging parts so as to form a radial shape inside the mirror part at the lower part of the processing tower main body, and a trough formed between the bulging parts. Since the backwash water discharged from the branch pipe hits the side wall of the bulging portion and pushes up the liquid treatment material, it can prevent stagnation and adheres to the liquid treatment material. Suspended substances can be washed out very well. Further, for example, in the case of a mixed bed type ion exchange tower, the bottom resin is pushed up as a turbulent flow by the backwash water jetting, and the anion exchange resin and the cation exchange resin are separated well, and then Thus, it is possible to smoothly carry out the regeneration process using the regenerating agent.
[0026]
In the case of the liquid processing tower of the present invention, unlike the conventional plate method and the support floor method, there is no formation of a portion that cannot be filled with the liquid processing material in the lower part of the processing tower body. The processing material can be filled, and the required height of the tower body can be made lower than before to process the same amount of liquid to be processed.
Also, in terms of production cost, it can be remarkably reduced as compared with the structure of the face plate or the support floor structure, which is extremely advantageous from the economical viewpoint.
Furthermore, in the case of the liquid treatment tower of the present invention, the liquid treatment material can be prevented from staying in the corner portion at the bottom of the tower body, and the liquid treatment material can be separated and backwashed efficiently.
[Brief description of the drawings]
FIG. 1 is a schematic sectional view showing an embodiment of the liquid processing tower of the present invention.
2 is a cross-sectional view taken along line AA in FIG.
FIG. 3 is a perspective view showing an example of a bulging part formed in a mirror part of the tower body.
FIG. 4 is a schematic view showing a lower structure of a conventional liquid processing tower (eye plate type).
FIG. 5 is a schematic view showing a lower structure of a conventional liquid processing tower (supported bed system).
[Explanation of symbols]
1: Treatment tower body 2: Mirror part 3: Inlet pipe 4: Distributor 5: Backwash water inlet pipe / treatment liquid outlet pipe 6: Swelling part 7: Valley part 8: Branch pipe 9: Liquid treatment material 10: Mother Pipe 11: Pump 12: Outlet pipe

Claims (1)

In the liquid processing tower for processing the liquid by passing it through the tower filled with the liquid processing material, independent bulges are formed inside the mirror part at the bottom of the tower main body so as to radiate from the center. A branch pipe in which a large number of liquid passage holes or slits are formed is disposed in each valley formed between the bulging parts, and the liquid processing material is covered with the bulging part and the branch pipe. The bottom of the tower body is filled, and when the liquid is passed, the treated liquid treated with the liquid treatment material is taken out through the flow hole or slit of the branch pipe. A liquid processing tower characterized in that backwashing water is jetted into the tower body, thereby eliminating the need for a support plate made of a plate or a porous plate.

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