JPH0615029B2 - Water collection device in treatment tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a desalting tower filled with an ion exchange resin, an adsorption tower filled with an adsorbent such as activated carbon, and a treatment tower filled with a filter material such as sand. The water collecting device is particularly effective for a desalting tower installed to appropriately maintain the water quality of a brackish water circulation system in a thermal power plant, a nuclear power plant, or the like.

[Conventional technology]

Conventionally, a condensate demineralizer for the purpose of desalination treatment in which a demineralizer is placed in a condensate system and external regeneration is already disclosed. The condensate demineralizer includes a desalting tower, that is, a mixed bed ion exchange tower, in which a cation exchange resin and an anion exchange resin are mixed and filled to remove cations and anions in raw water.

By the way, in the conventional desalting tower which is a mixed bed type ion exchange tower, a desalting tower to which a bottom plate type water collecting device is applied, a square water collecting main pipe and a treated water upper extracting type water collecting device are applied. A desalting tower and the like are disclosed.

First, an outline of a water collecting device in a desalination tower to which a bottom plate type water collecting device is applied will be described with reference to FIGS. 3 and 4.

The water collecting device 50 has a water collecting main pipe 55 extending in the diametrical direction at the bottom of the desalting tower 53, and is arranged above the water collecting main pipe 55 and at the water collecting main pipe 55. It has a large number of water collection branch pipes 52 communicating with each other. These water collecting branch pipes 52 are arranged near and above the bottom plate 56 for resin. The treated water outlet 58 is formed in the bottom end plate 60 of the desalting tower 53. Further, the resin outlet port 54 extends downward from the lower surface of the bottom plate 56 and from the side of the upper plate 51 of the water collecting main pipe 55.
In the figure, 57 is a support column for supporting the bottom plate 56, and 59 is the bottom plate 56.
The resin adhered to the side wall of the desalting tower of No. 1, 61 indicates a support base.

Next, regarding a water collecting device in a desalination tower using a rectangular water collecting main pipe and applying a treated water upper discharge type water collecting device,
A general description will be given with reference to FIGS. In the water collecting device 70, the ion exchange resin flows out from the resin outlet 74 provided at the bottom of the end plate 75. A pipe 77 of the treated water outlet 78 is arranged above the water collecting main pipe 71, and the water collecting main pipe 71 and the pipe 77 communicate with each other. In the figure, 76 is a water collecting branch pipe supporter that supports the water collecting branch pipe 72, and 80 is a desalting tower 73.
The support base of is shown.

[Problems to be solved by the invention]

However, in the water collecting device 50 in the desalting tower to which the above-mentioned bottom plate type water collecting device is applied, the water collecting branch pipe 52 and the bottom plate 56 are close to each other, and the ion exchange resin is effectively used, but the ion exchange resin is used. When the resin used for treating raw water is used to remove the resin having no ion exchange ability to the outside of the desalting tower 53, the resin adheres to the vicinity of the side wall of the desalting tower of the bottom plate 56 and easily remains there. There was a problem that the condition occurred.

Further, regarding the water collecting device 70 in the desalting tower 73 using the above-mentioned rectangular water collecting main pipe 71 and applying the treated water upper discharge type water collecting device, the ion exchange resin is along the curved surface of the bottom plate of the end plate 75. Since the resin slides down and flows out from the resin outlet 74, the resin does not remain in the desalting tower 73. However, the treated water outlet pipe 77 and the treated water outlet 78 are provided.
Is located above the main water collection pipe 71, the desalting tower 73
There is a problem that the ion exchange resin filled in the inside is not effectively used, and the treated water in the desalting tower 73 can be discharged only to the level of the treated water outlet 78.

Therefore, an object of the present invention is to eliminate the above problems, when discharging the granular packing from the processing tower, that is, when transferring the packing, without leaving the granular packing in the processing tower, It can be smoothly discharged from the treatment tower, the granular material filled in the treatment tower can be effectively used, and the treated water that has been treated can be taken out without being left in the treatment tower. It is to provide a water device.

[Means for solving problems]

The present invention is configured as follows to achieve the above object. That is, the present invention, the lower end plate of the treatment tower is formed into a curved surface, a granular packing physical distribution outlet is provided at the lowest part of the curved surface of the end plate, and a water collecting main pipe is provided at the bottom of the processing tower,
The water collecting main is composed of a bottom plate constituted by a part of the bottom part of the end plate, a pair of side plates standing apart from the bottom plate to which a large number of water collecting branch pipes are respectively attached, and an upper plate fixed to each side plate, A treated water outlet is provided in the bottom plate constituting the main water collecting main pipe, and a through passage is formed above the granular packing outlet so as to extend over each of the side plates. .

[Action]

The water collecting device in the treatment tower according to the present invention is configured as described above and operates as follows. That is, in the water collecting device in this treatment tower, the lower end plate of the treatment tower is formed into a curved surface, the granular packing physical distribution outlet is provided at the bottom of the end plate, and the water collecting main pipe is provided at the bottom of the treatment tower. The water main pipe is composed of a bottom plate constituted by a part of the bottom part of the end plate, a pair of side plates standing apart from the bottom plate to which a large number of water collecting branch pipes are respectively attached, and an upper plate fixed to each side plate, and further processed. Since the water outlet is provided on the bottom plate of the main water collecting pipe, the used granular packing is moved downward along the curved surface of the lower end plate of the processing tower during transfer for discharging the granular packing from the inside of the processing tower. It is possible to slip off and to make the whole flow out from the granular packed physical distribution outlet, and not to remain in the processing tower.

Moreover, the treated water that has been treated in the treatment tower is also collected from the water collection branch pipe to the water collection main pipe whose bottom plate is the end plate of the treatment tower, and is formed on the bottom plate forming the water collection main pipe. The treated water is discharged from the outlet.

〔Example〕

Hereinafter, a water collecting device in a treatment tower will be described as an example according to the present invention with reference to the drawings.

In FIG. 1, the water collecting device in the treatment tower according to the present invention is indicated by reference numeral 1. This water collecting device 1 is applied to a desalting tower 3 which is a treatment tower. The desalting tower 3 is a mixed bed type ion exchange tower of a condensate demineralizing equipment, and it is a positive ion contained in water from raw water. A desalting process of removing ions and anions to obtain treated water is performed, and an ion exchange resin is regenerated by a regeneration device outside the desalting tower 3.

That is, this condensate demineralizer does not regenerate the resin, which has been depleted in ion exchange capacity for treating raw water, in the demineralization tower 3 and uses a regenerator provided separately from the demineralization tower 3 This is to regenerate the resin.

At the upper part of the desalting tower 3, there are provided a raw water inlet 13 through which raw water flows into the desalting tower 3 and an ion exchange resin inflow pipe 14 through which an ion exchange resin flows into the desalting tower 3. Further, a raw water inflow main pipe 15 to which a large number of raw water inflow branch pipes 12 are attached is arranged at an upper portion of the desalting tower 3 by an appropriate supporting means (not shown). Raw water inflow main 15 is raw water inlet 1
It communicates with 3.

Further, in the lower part of the desalting tower 3, a treated water outlet 8 for discharging treated water obtained by treating raw water to the outside of the desalting tower 3 and an ion exchange resin stream for discharging used ion exchange resin to the outside of the desalting tower 3. An exit 4 is provided. Further, a water collecting main pipe 5 having a large number of water collecting branch pipes 2 for collecting treated water is installed in the lower part of the desalting tower 3 in a structure as described later. The water main 5 is
It is in conduction with the treated water outlet 8 and is in non-conduction with the ion exchange resin outlet 4.

The water collecting device 1 in the desalting tower according to the present invention is characterized by the following points in the above configuration.

That is, in the desalting tower 3, an end plate 10 constituting the lower part thereof is formed into a curved surface, an ion exchange resin outlet 4 is provided at the bottom of the end plate 10, and a treated water outlet 8 is further provided at the bottom of the end plate 10. That is.

Further, regarding the water collecting main pipe 5, the bottom plate of the water collecting main pipe 5 to which a large number of water collecting branch pipes 2 are attached is constituted by the bottom portion of the end plate 10, and the pair of side plates 6 and 6 and the side plates 6 and 6 can be removed. It is composed of an upper plate 9 fixed to. Specifically, for example, these side plates 6 and 6 are directly fixed to the lower end plate 10 of the deionization unit 3 by welding or the like, and the upper plate 9 can be removed by bolts or the like at the upper ends of the side plates 6 and 6. Is stuck to. Therefore, the water collection main pipe 5 itself is configured to be shielded from the ion exchange resin 11 filled in the desalting tower 3.

Further, the water collecting branch pipe 2 is detachably attached to each of the side plates 6 and 6 in a substantially vertical direction, and further, a through passage 7 extending over the side plates 6 and 6 above where the ion exchange resin outlet 4 is located.
Are formed. The through passage 7 is formed in a semi-cylindrical shape extending across the side plates 6 and 6, and is completely shielded from the water collecting main pipe 5, that is, in a non-conducting state. The ion exchange resin filled in the tower 3 is the water collection main pipe 5
It is in a state where it cannot enter inside.

The multiple water collecting branch pipes 2 are made of a member such as a wedge wire screen or a perforated pipe around which a net is wound so that the ion exchange resin does not pass through, and are configured so that the ion exchange resin does not pass through. Therefore, the treated water treated by passing the raw water through the ion-exchange resin layer 11 filled in the desalination 3 can pass through the water collecting branch pipe 2, but the ion-exchange resin enters the water collecting branch pipe 2. There is no such thing.

The water collecting device 1 in the desalting tower according to the present invention is configured as described above and operates as follows. When the ion exchange resin is used for the treatment of raw water and the ion exchange capacity is lost, the ion exchange resin is discharged from the ion exchange resin outlet 4 and transferred to the regenerator as shown by arrow C.
When the ion-exchange resin is discharged from the desalting tower 3 and becomes empty, a new ion-exchange resin or an ion-exchange resin regenerated by a regenerator is fed from the ion-exchange resin inflow pipe 14 to the desalting tower 3 by an arrow. Inflow and fill as shown at B. When the ion exchange resin is filled in the desalting tower 3 to form the ion exchange resin layer 11, the raw water is, as shown by an arrow A,
From the raw water inlet 13, the raw water inflow main pipe 15 and then the raw water inflow branch pipe 12 are uniformly dispersed and flown into the desalination tower 3.

While the raw water flowing into the desalting tower 3 passes through the ion exchange resin layer 11, cations and anions contained in the raw water are ion-exchanged with the ion exchange resin.

As a result, the treated water of the pure water that has been subjected to the ion exchange treatment, that is, the treated water that has become desalted water, is introduced into the water collecting main pipe 5 from the water collecting branch pipes 2 arranged in large numbers at the lower part of the desalting tower 3, and then the arrow As indicated by D, the treated water flows out from the desalination tower 3 through the outlet 8.

By the way, the water collecting branch pipes 2 are directly attached to the side plates 6 and 6 on both sides constituting the water collecting main pipe 5, and the upper plate 9 is detachable by bolts or the like across the side plates 6 and 6. The treated water can flow into the water collection tube 2 because it is fixed in a sealed state, but the ion exchange resin does not collect the treated water.
It does not flow into the inside, and of course does not enter the water collecting main pipe 5.

Therefore, when the ion exchange capacity of the ion exchange resin is reduced by continuing the flow of raw water, the flow of raw water is stopped and, for example, a valve (not shown) is opened, and as described above, Replace the exchange resin with the ion exchange resin outlet 4
The ion exchange resin used in the desalting tower 3 is completely discharged, and then a new ion exchange resin or a regenerated new ion exchange resin is introduced into the desalting tower 3 from the ion exchange resin inflow pipe 14. Fill. By repeating such an operation, the cations and anions contained in the raw water are removed, that is, desalting treatment is performed to obtain pure water, that is, desalted water.

Generally, the biggest obstacle in this cycle is
When the ion-exchange resin is discharged, the resin whose ion-exchange capacity is lost remains in the desalting tower and the quality of treated water, that is, pH of treated water, acid consumption, electric conductivity, etc., or total evaporation residue, etc. However, if the water collecting device 1 in the desalting tower according to the present invention is used, it is possible to manage the ion exchange resin itself only to have ion exchange capacity. Water quality can always be kept normal and homogeneous. Further, the water collecting device in this treatment tower can be applied to an adsorption tower and a filtration tower in addition to the desalting tower.

〔The invention's effect〕

The water collecting device in the treatment tower according to the present invention is configured as described above and has the following effects. That is, in the water collecting device in this treatment tower, the lower end plate of the treatment tower is formed into a curved surface, the granular packing physical distribution outlet is provided at the lowest part of the end plate, and the bottom plate of the main water collecting pipe with a large number of water collecting branch pipes is attached. Since the bottom end of the end plate is formed, and the treated water outlet is provided on the bottom plate of the water collecting main pipe, when the used granular packing is transferred, the granular packing is provided along the curved lower end plate of the processing tower. And then slides downward, passes through the through passage, and all flows out of the processing tower from the granular packed physical distribution outlet.

Therefore, the granular packing does not remain in the processing tower, and the granular material packed in the processing tower can be effectively used.

Further, the water collecting device in the treatment tower according to the present invention has a structure in which there is no outflow pipe for disturbing the flow of raw water in the granular packing filled in the treatment tower at the time of water collection. The granular material layer is used very effectively. Also,
Water in the treatment tower is also collected from the filter of the water collecting branch pipe to the water collecting main pipe having the bottom portion of the treatment tower as a bottom plate, and is discharged from the treated water outlet formed in the bottom plate.

Therefore, by using the water collecting device in the treatment tower according to the present invention, the treated water quality can always be kept normal and uniform, and the treated water quality is always stable, so that the reliability of the treated water is extremely high. Will be things.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a water collecting device in a treatment tower according to the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 3 is water collecting in a conventional desalting tower. Sectional drawing which shows an example of an apparatus, FIG. 4 is a partial sectional view in the line IV-IV of FIG. 3, FIG. 5 is a sectional view which shows another example of the water collecting apparatus in the conventional desalination tower, and FIG. FIG. 6 is a partial sectional view taken along line VI-VI in FIG. 1 ... Water collecting device in desalting tower, 2 ... Water collecting branch pipe, 3 ...
… Desalination tower, 4 …… Ion exchange resin outlet, 5 …… Water collecting main pipe, 6 …… Side plate, 7 …… Through passage, 8 …… Treatment water outlet,
9 ... Upper plate, 10 ... End plate, 11 ... Ion exchange resin layer, 12 ... Raw water inflow branch pipe, 13 ... Raw water inlet, 14
…… Ion exchange resin inflow pipe, 15 …… Raw water inflow main pipe.

Claims (1)

[Claims] 1. A lower end plate of a treatment tower is formed into a curved surface, a granular packing physical distribution outlet is provided at the bottom of the curved surface of the end plate, and a water collecting main pipe is provided at the bottom of the processing tower. A bottom plate constituted by a part of the bottom part of the end plate, a pair of side plates standing apart from the bottom plate to which a large number of water collecting branch pipes are respectively attached, and an upper plate fixed to each side plate, and a treated water outlet is A water collecting device in a treatment tower, wherein the water collecting main is provided on the bottom plate, and a through passage is formed above the granular packed physical distribution outlet so as to extend over the side plates.