JPH078788A - Liquid collecting mechanism in treatment column filled with treating agent - Google Patents

Abstract

PURPOSE:To prevent the generation of residual liquid, separate respective components with good accuracy and collect liquid by installing a filter screen covering only liquid collecting pores on the outer side face of a liquid collecting tube provided with liquid collecting pores on its lower face. CONSTITUTION:Circular liquid collecting pores 10 are formed at small intervals in the longitudinal direction on the lower face of a tube main body 9 of a liquid collecting tube 3. A plurality of wedge wires 11 with sections of wedge shape which are bent into the arch shape are set on the outer lower face of the tube main body 9 in the state of covering only the peripheral sections arranged in the longitudinal direction of the liquid collecting pores 10, and both ends of respective wedge wires 11 are welded with fine clearances respectively, by which an arch-shaped filter screen 12 extending in the generating line direction is formed on the lower face of the main tube 9. Raw liquid this fed is treated in the given manner while passing through the clearances of ion exchange resin grains 5 and flowed down into root sections of a support plate 2, and the liquid flowing down respective liquid collecting tubes 3 in respective root sections is branched into the left and right of the tubes to join the liquid flowing down onto the side sections of liquid collecting tubes 3, and the liquid is flowed down jointly without remaining and almost at the same speed through a common passage heading for the liquid collecting pores 10.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a treatment tower filled with an ion exchange resin, a synthetic adsorbent, activated carbon, and various other liquid treatment agents, and the treatment liquid treated with the above treatment agents is collected in the treatment tower. And a liquid collecting mechanism for taking it out of the tower.

[0002]

2. Description of the Related Art Conventionally, as a liquid collecting mechanism of this type, in a processing tower filled with a processing agent, a corrugated plate is stretched on the bottom of the tower,
At each valley of the corrugated plate, there is provided a liquid collecting pipe having a liquid collecting pipe main body having a small liquid collecting hole on the lower surface and a filter screen made of synthetic resin net, wire mesh, cloth, etc. At the same time, one end of each liquid collection pipe was extended outside the tower to connect to the discharge pipe, and the stock solution supplied into the tower from the upper part of the processing tower was made to flow down between the processing agents to undergo a predetermined treatment. After that, the treatment liquid is generally collected from the small collection holes into the collection pipe and taken out of the tower.

[0003]

However, in the conventional liquid collecting mechanism, as shown in FIG. 5, the liquid flow (a) flowing down onto the liquid collecting pipe (P) passes through the filter screen (S). Then, it quickly flows through the narrow gap between the screen (S) and the outer peripheral surface of the liquid collection pipe body (d) and flows into the small liquid collection hole (h).
The liquid flow (b) that has flowed down to the side part that has deviated from the liquid collection pipe (P) is treated later than the liquid flow (a) because the treatment agent present in the side part acts as a resistance against the liquid flow. Once the flow path for the liquid flow (a) is made to flow more slowly between the agents, the liquid flow (b) tends to stay in the side portion, and in some cases, the side portion There was a problem that the department became a dead zone and caused corruption.

Further, when the conventional liquid collecting mechanism is used for collecting liquid of a chromatographic separation column in which a mixed stock solution containing a plurality of kinds of components is sequentially separated for each of the components, the first separation is performed. When the component is tailed, it mixes with other separated components in the subsequent process to significantly reduce the separation accuracy, and when it is used for collecting the ion exchange resin tower for pure water production, it is regenerated in the washing process of the regenerated chemical liquid during regeneration. Since the tailing of the chemical solution requires a long time for cleaning, there is a drawback that the amount of cleaning water used increases. An object of the present invention is to eliminate the drawbacks of the conventional liquid collecting mechanism.

[0005]

In order to achieve the above object, the present invention provides a support plate having peaks and valleys alternately arranged on the inner bottom of a tower filled with a treating agent. In a configuration in which a liquid collection pipe is installed on each valley of the support plate, the liquid collection pipe has a filtration screen that covers only the portion of the liquid collection small hole on the outer surface of the tube body having the liquid collection small hole on the lower surface. We propose a liquid collection mechanism in the processing tower filled with the processing agent.

"Small liquid collecting hole" of the liquid collecting pipe in the present invention
May be a slit as well as a circular small hole. In addition, the "filtration screen" includes a synthetic resin net, a wire mesh, a cloth,
Alternatively, wedge wire screens in which wedge wires having a cross section of a wedge shape are made parallel to each other with a slit formed therebetween, and support wires are orthogonally welded inside thereof, wedge wire screens excluding the support wires, and various other things Is used. Embodiments of the present invention will be described below with reference to the drawings.

[0007]

EXAMPLES FIGS. 1 and 2 are examples of implementation in a liquid collecting mechanism of a chromatographic separation column in which a column is filled with an ion-exchange resin, and a mountain portion and a valley portion are alternately formed on the inner bottom surface of the column (1). A support plate (2) consisting of a continuous corrugated plate is stretched, and liquid collecting pipes (3) are arranged at respective valleys of the supporting plate (2), and one end of each liquid collecting pipe is placed outside the tower. In the tower (1), which extends and is connected to a header pipe (4), and the header pipe (4) is connected to a discharge pipe (not shown), and thus the liquid collecting pipes (3) ... Are filled with ion exchange resin particles (5), and a stock solution supply pipe (6) is connected to the upper end of the tower (1). Note that the header pipe (4) is configured such that the closed end has a larger diameter from the open end to the liquid outlet toward the open end as shown in FIG.
Denoted at (7) are holding rods for holding the liquid collection pipes (3) on the support plate (2), and denoted at (8) is a distributor connected to the inner end of the tower of the undiluted liquid supply pipe (6).

The structure of the liquid collecting pipes (3) is as follows. The tube body (9) is, for example, a metal circular tube, and circular liquid collection small holes (10) are provided on the lower surface of the tube body at small intervals in the longitudinal direction. Figures 3 and 4
As shown in Fig. 5, a large number of wedge wires (11), which are wedge-shaped in cross section, are thinly crossed with each other so as to cover only the circumferential surface portions of the liquid collecting small holes (10) arranged in the longitudinal direction. The ends of each wedge wire are welded to each other with a gap, thereby forming an arch-shaped filter screen (12) extending in the generatrix direction on the lower surface of the tube body (9).

The operation of the above example will be described below. When the raw water is pressure-fed into the tower (1) through the raw water supply pipe (6), the supplied raw liquid passes through the gaps of the ion exchange resin particles (5) ... The liquid that has flowed down onto each collecting pipe (3) in each trough is removed from the flow passage that is easy to flow as in the conventional case, and is therefore divided into left and right sides of each collecting pipe (3). , While at least partially merging with the liquid that has flowed down to the side of the liquid collection pipe (3), they both flow down the common flow path toward the liquid collection small holes (10) at substantially the same speed, As a result, the liquid does not stay in the lateral part of the liquid collection pipe (3).

The support plate used in the present invention is not limited to the support plate (2) of the above example, and a large number of protrusions having a mountain-shaped cross section are attached to the upper surface of a flat plate so that the mountain portions and the valley portions alternate. The formed one is also used.

[0011]

According to the liquid collecting mechanism in the processing tower filled with the treating agent of the present invention, only the portion of the liquid collecting small hole on the lower surface of the collecting pipe is covered with the filter screen, so that the space between the treating agents is reduced. The liquid that has passed through and has been subjected to the predetermined treatment and flowing down into the valley of the support plate has at least one of the liquid flowing down on the collecting pipe and the liquid flowing down to the side part of the collecting pipe in the valley of the supporting plate. When they join together, they both flow down the flow path toward the liquid collection small holes at approximately the same speed, which makes it possible to prevent the occurrence of liquid retention, and
When used in the liquid collection mechanism of a chromatographic separation column, each component can be separated and collected accurately without tailing.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a chromatographic separation column.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged view of a liquid collecting tube portion in FIG.

4 is a partial cross-sectional view taken along the line IV-IV in FIG.

FIG. 5 is a schematic line-enlarged cross-sectional view of a conventional liquid collection tube.

[Explanation of symbols]

 1 Tower 2 Support Plate 3 Liquid Collection Tube 5 Ion Exchange Resin Particles 9 Tube Body 10 Liquid Collection Small Hole 12 Filtration Screen

Claims (1)

[Claims] 1. A structure in which a support plate having peaks and valleys alternately arranged on the upper surface is stretched on the inner bottom of a tower filled with a treatment agent, and a liquid collecting pipe is installed on each valley of the support plate. In the treatment column filled with the treatment agent, the liquid collection pipe is provided with a filtration screen that covers only the portion of the liquid collection small hole on the outer surface of the tube body having the liquid collection small hole on the lower surface. Collection mechanism.