JPH0647556Y2 - Ion exchange resin tower - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is used for a deionizer, a condensate demineralizer, etc., and is used in an ion exchange resin tower filled with an ion exchange resin, especially in a resin layer. The present invention relates to an ion exchange resin tower equipped with an improved intermediate water collection / distribution mechanism for collecting reclaimed waste liquid and dispersing backwash water.

[Prior Art] As the ion-exchange resin tower, a counter-current type ion-exchange resin tower having a downward flow water / upflow regeneration method with good regeneration efficiency has been widely adopted.

In such a countercurrent type ion exchange resin tower, as shown in FIG. 4, a resin layer 12 is formed in the tower 11, an intermediate water collecting and distributing mechanism 13 is embedded in the upper portion of the resin layer 12, and An upper water collecting / distributing mechanism 14 is installed in the upper part, and a lower water collecting / distributing mechanism 15 is installed in the lower part of the tower 11.When water flows, the raw water supplied from the upper water collecting / distributing mechanism 14 flows downward in the resin layer 12. Lower water collection and distribution mechanism
It flows to the outside through 15.

Further, at the time of regeneration, first, backwash water is made to flow in from the intermediate water collection and distribution mechanism 13 and washing wastewater is made to flow out from the upper water collection and distribution mechanism 14, and after backwashing the portion of the resin layer 12 above which there is severe clogging, The regenerant is introduced from the lower water collecting / distributing mechanism 15 and also from above the resin layer 12 if necessary, and after the resin layer 12 is regenerated, the regenerated waste liquid is collected by the intermediate water collecting / distributing mechanism 13. It is done and flows out.

By the way, the conventional intermediate water collecting and distributing mechanism 13 is shown in FIGS.
As shown in the figure, the upper part of the resin layer 12 in the tower 11 is wrapped with a collector main pipe 16 and a salan net, a wire net, a wedge wire screen, etc. branched from the collector main pipe 16 to prevent the outflow of the ion exchange resin. It was composed of a plurality of perforated pipe-type collector branches 17 attached. Reference numeral 18 denotes a support portion of the collector main pipe 16, and 19 denotes a support portion of the collector branch pipe 17.

[Problems to be solved by the device]

However, since the intermediate water collection and distribution mechanism 13 of the conventional countercurrent ion exchange resin tower is buried in the resin layer 12, turbidity in the raw water in the downward flowing water is near the surface layer of the resin layer 12. The water flow differential pressure rises, the resin is consolidated, and an excessive force is applied to the intermediate water collecting and distributing mechanism 13 from above.

For this purpose, the collector main pipe 16, collector branch pipe 17, various support parts 1
It is necessary to reinforce 8, 19 and make the water flow rate below a certain value, thicken the upper resin layer to reduce the force from the upper part, etc., and further embed it in the resin layer. Collector main pipe 16, collector branch pipe
17, the total projected area of the support parts 18, 19 is about 30
%, So the resin layer 12
There was also the drawback that the flow of liquid inside was often disturbed.

The present invention is an ion exchange that can keep the flow of liquid in the resin layer uniform without applying excessive force to the intermediate water collection and distribution mechanism even if the resin is compacted, and can solve the above-mentioned conventional restrictions and drawbacks. It is intended to provide a resin tower.

[Means for Solving the Problems]

The present invention is an ion-exchange resin tower in which an intermediate water collecting and distributing mechanism for collecting and distributing water in the upper part of the resin layer is provided in the tower, and the collector main pipe is provided above the resin layer surface as the intermediate water collecting and distributing mechanism. The ion exchange resin tower is characterized in that a plurality of branch pipes, each having a strainer attached to a tip portion thereof, are suspended from a collector main pipe into a resin layer.

[Action]

In the present invention having the above-mentioned structure, only the tip of the collector branch pipe is buried in the resin layer, and further, it is buried in parallel with the flow direction in the tower, and the support portion can be provided above the resin layer. The projected area of the buried portion in the resin layer can be about 2% of the tower cross-sectional area only by the cross-sectional area of the collector branch pipe or strainer. Therefore, even if the resin is consolidated in the water flow, the water flow rate can be increased without applying an excessive force to the collector branch pipe or strainer, and it is not necessary to thicken the resin layer above the strainer. There is little possibility of disturbing the flow in the layer, and a uniform flow can be obtained in the resin layer.

When regenerating the resin layer, the backwash water is dispersed from the collector main pipe through the collector branch pipe and strainer into the resin layer, and the regenerated waste liquid is collected by the strainer and flows out from the collector branch pipe and collector main pipe. Then, it is performed in the same manner as the above-mentioned conventional intermediate water collecting and distributing mechanism.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings.
In FIGS. 3 to 3, a collector main pipe 3 is horizontally provided above the surface of the resin layer 2 in the tower 1, and a plurality of collector branch pipes 4 branched from the collector main pipe 3 are vertically downward. Strainer 5 is attached to the tip of each collector branch pipe 4 by being bent to the inside of the resin layer 2.

The strainer 5 is a porous material that prevents the passage of resin and allows only the liquid to pass, and it is preferable that the strainer 5 has a columnar shape or a prismatic shape, has a small imaging area, and is hard to receive a force from above.

6 is a support part of the collector main pipe 3, and 7 is a support part which supports the collector branch pipe 4 above the resin layer 2.

Thus, since only the collector branch pipe 4 and the strainer 5 are inserted into the resin layer 2 in the vertical direction parallel to the flow direction in the tower, the structure is less likely to receive the force due to the resin consolidation during water passage. In addition, the function of the intermediate water collection and distribution mechanism is no different from the conventional one.

[Effect of device]

As described above, according to the present invention, since the projected area is small, it is not necessary to thicken the resin layer on the upper part of the collector tube and strengthen various reinforcements as in the conventional case, the amount of resin is reduced, and the compact size is reduced. The structure makes it possible to increase the water flow rate. Furthermore, there is little turbulence in the flow of water in the resin layer of the water collection and distribution mechanism, and a uniform flow can be obtained in all resin layers. It has many extremely useful effects.

[Brief description of drawings]

1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line I--I of FIG. 1, FIG. 3 is a partially enlarged explanatory view of FIG. 1, and FIG. FIG. 5 is an explanatory view of a conventional countercurrent type ion exchange resin tower, FIG. 5 is a longitudinal sectional view showing a conventional example, and FIG.
FIG. 11 is a sectional view taken along line II-II. 1,11 …… Tower, 2,12 …… Resin layer, 3,16 …… Collector main,
4,17 …… Collector branch pipe, 5 …… Strainer, 6,7,18,19
…… Support section, 13 …… Intermediate water collection and distribution mechanism, 14 …… Upper water collection and distribution mechanism, 15 …… Lower water collection and distribution mechanism.

Claims (1)

[Scope of utility model registration request] 1. An ion exchange resin tower in which an intermediate water collecting and distributing mechanism for collecting and distributing water in an upper portion of the resin layer is provided in the tower, and a collector main pipe is provided above the resin layer surface as the intermediate water collecting and distributing mechanism. An ion-exchange resin tower, characterized in that a plurality of branch pipes having a strainer attached to the tip end thereof are suspended from the collector main pipe into a resin layer.