JP3049462B2 - Liquid collection mechanism in processing tower filled with processing agent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing tower filled with an ion-exchange resin, a synthetic adsorbent, activated carbon, and various other liquid processing agents. And a liquid collecting mechanism for taking out of the column.

[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 sheet is stretched at the bottom of the tower,
At each valley of the corrugated plate, a collecting pipe formed by winding a filtration screen such as a synthetic resin net, a wire net, and a cloth is provided on the entire peripheral surface of the collecting pipe main body having a collecting hole on the lower surface. At the same time, one end of each liquid collection tube was extended outside the column, connected to a discharge tube, and subjected to a predetermined treatment while the stock solution supplied from the top of the treatment column into the column was allowed to flow down between the treatment agents. After that, a treatment liquid is generally collected from a collection hole into a collection tube and taken out of the column.

[0003]

However, in the conventional liquid collecting mechanism, as shown in FIG. 5, the liquid flow (a) flowing down on the liquid collecting pipe (P) passes through the filtration screen (S). Then, the liquid quickly flows through the narrow gap between the screen (S) and the outer peripheral surface of the liquid collecting tube body (d) and flows into the small liquid collecting hole (h).
The liquid flow (b) flowing down to the side portion off the liquid collecting pipe (P) is delayed later than the liquid flow (a) because the processing agent existing in the side portion becomes a resistance of the liquid flow. If the flow of the liquid (a) is easy to flow once, the liquid flow (b) tends to stay in the side portion, and in some cases, the liquid flow (b) tends to stay in the side portion. There was a problem that the part became a dead zone and rot occurred.

[0004] Further, when the conventional liquid collecting mechanism is used for liquid collection in a chromatographic separation tower which sequentially separates a mixed stock solution containing a plurality of components with time for each component, one of the preceding separation methods is used. The components are mixed into other subsequent components by tailing to significantly lower the separation accuracy, and when used in the collection of ion-exchange resin towers for pure water production, they are regenerated in the washing step of the regenerated chemical solution during regeneration. A long time is required for cleaning due to the tailing of the chemical solution, so that there is a disadvantage that the amount of cleaning water used increases. An object of the present invention is to eliminate the disadvantages of the conventional liquid collecting mechanism.

[0005]

In order to achieve the above-mentioned object, according to the present invention, a support plate having peaks and valleys alternately provided on the inner bottom of a tower filled with a treating agent is provided. In the configuration in which the liquid collecting tubes are provided on each valley of the support plate, the liquid collecting tubes are provided on the outer surface of the tube main body having the liquid collecting small holes on the lower surface, and the filtration screen covers only the liquid collecting small holes. The present invention proposes a liquid collecting mechanism in a processing tower filled with a processing agent.

In the present invention, the "liquid collecting hole" of the liquid collecting tube is used.
May be a slit as well as a circular small hole. In addition, the above “filtration screen” includes a synthetic resin net, a wire mesh, a cloth,
Or a wedge wire screen in which wedge wires having a cross-sectional wedge shape are parallel to each other with a narrow gap and a support wire is orthogonally welded inside the wedge wire screen, a wedge wire screen excluding the above support wire, and various other things Is used. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0007]

1 and 2 show an example in which a column is filled with an ion-exchange resin, and is applied to a liquid collecting mechanism of a chromatographic separation column. Crests and valleys are alternately formed on the inner bottom surface of the column (1). A support plate (2) made of a continuous corrugated plate is stretched, and liquid collection tubes (3) are arranged in each valley of the support plate (2). The header pipe (4) is extended and connected to the header pipe (4), and the header pipe (4) is connected to a discharge pipe (not shown). Thus, the collection pipes (3). Are charged with ion exchange resin particles (5), and a stock solution supply pipe (6) is connected to the upper end of the tower (1). As shown in FIG. 2, the header tube (4) is configured so that the closed end thereof gradually increases in diameter from the liquid outlet to the liquid outlet.
(7)... Are holding rods for holding the liquid collection tubes (3)... On the support plate (2), and (8) is a distributor connected to the column inner end of the stock solution supply tube (6).

The structure of the liquid collecting tubes (3) is as follows. The tube main body (9) is, for example, a metal circular tube, and circular collecting holes (10) are provided on the lower surface thereof at small intervals in the longitudinal direction. Figures 3 and 4
A plurality of wedge wires (11) bent in an arc shape in a wedge-shaped cross section as shown in FIG. 3 are thinned from each other while covering only the circumferential surface portions of the small collecting holes (10) arranged in the longitudinal direction. A gap is welded to each end of each wedge wire, thereby forming an arc-shaped filtration screen (12) extending in the generatrix direction on the lower surface of the pipe body (9).

The operation of the above example will now be described. When raw water is pressure-fed into the tower (1) through the raw water supply pipe (6), the supplied raw liquid undergoes a predetermined treatment while passing through the gaps of the ion exchange resin particles (5) and flows down into the support plate valley. The liquid which has flowed down onto each liquid collecting pipe (3) in each valley portion is divided into the left and right sides of each liquid collecting pipe (3) because the flow path which is easy to flow as in the prior art is removed. , While flowing at least partially with the liquid flowing down to the side of the liquid collecting pipe (3), and flowing down at the same speed in a common flow path toward the liquid collecting small holes (10). Thereby, the liquid does not stay on the side of the liquid collection pipe (3).

The support plate used in the present invention is not limited to the above-described support plate (2), and a plurality of ridges having a mountain-shaped cross section are attached to the upper surface of a flat plate to alternately form peaks and valleys. Those formed are also used.

[0011]

According to the liquid collecting mechanism in the processing tower filled with the processing agent of the present invention, only the small collecting holes on the lower surface of the liquid collecting tube are covered with the filtration screen. The liquid that has passed down and flows into the support plate valley while undergoing the predetermined treatment is such that at least one of the liquid flowing down on the collecting tube and the liquid flowing down to the side of the collecting tube is in the support plate valley. Partially merged and flow down the flow path toward the collection hole at substantially the same speed, thereby preventing the occurrence of stagnation of the liquid,
When used in the liquid collecting mechanism of the chromatographic separation tower, each component can be separated and collected with high precision without tailing.

[Brief description of the drawings]

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

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

FIG. 3 is an enlarged view of a liquid collecting tube part in FIG. 1;

FIG. 4 is a partial cross-sectional view taken along the line IV-IV of FIG. 3;

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tower 2 Support plate 3 Liquid collecting tube 5 Ion exchange resin particle 9 Tube main body 10 Small liquid collecting hole 12 Filtration screen

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-166428 (JP, A) JP-A-3-47036 (JP, U) JP-A-59-111857 (JP, U) JP-A-6-167 15735 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01J 8/02 B01D 15/00 B01J 47/02

Claims (1)

(57) [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 treating agent, and a liquid collecting pipe is installed on each valley of the support plate. In the processing tower filled with a processing agent, the liquid collection tube is provided with a filtration screen that covers only a part of the liquid collection small hole on an outer surface of a tube main body having a liquid collection small hole on a lower surface. Liquid collecting mechanism.