JPH0425221Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is used in gas-liquid contact towers such as reaction towers, absorption towers, steaming towers, and cooling towers by fluidizing the packing layer for gas-liquid contact to form walls. This invention relates to a liquid redispersion device that collects liquid that has become a stream and disperses it onto a lower packed layer.

(Prior art) In this type of gas-liquid contact tower, even if the liquid is dispersed on the packed layer, the liquid flows to the column wall side as it passes through the packed layer and flows down along the inner wall surface of the column. Therefore, if the liquid is allowed to flow directly onto the lower packing layer, the contact efficiency is extremely poor, so it is necessary to redistribute the liquid each time it passes through the packing layer.
As a method for this purpose, as shown in FIG. 8, a liquid collection device 20 is provided under the upper packing layer 13 that does not impede the upward flow of gas, and this collects the descending liquid. Dispersion can be carried out by supplying the liquid onto a dispersion device 21 such as a pipe type or perforated plate type, or a collecting collar 22 with a number of notches cut into the inner circumferential edge as shown in FIG. A method is adopted in which the liquid that descends along the inner wall of the tower falls to a position away from the inner wall.

(Problem to be solved by the invention) However, in the former of the above redispersion methods, the liquid collection device 20 and the dispersion device 21 are provided in two stages, which increases the tower height and increases the manufacturing cost of the tower. There is a problem with bulk. In the latter case, the liquid collecting collar 22 made of plastic may be deformed due to heat or fatigue and may droop, or the liquid falling along the liquid collecting collar 22 may be blown up by the upward flow of gas and become Since the liquid flows from the back surface of the collar 22 toward the inner wall of the column, there is a drawback that the uniform dispersion of the liquid is poor.

This invention solves the above-mentioned conventional problems and aims to provide a liquid redispersion device that can effectively redistribute liquid using a small and compact device.

(Means for solving the problem) However, in the liquid redispersion device of this invention, a horizontal annular channel is provided on the upper surface of the annular body having an outer diameter smaller than the inner diameter of the column, and the channel is connected to the annular channel. A branch body having a horizontal branch channel on the upper surface thereof is connected to the inner diameter side of the annular body, and the annular channel is provided with a side wall at least on the inner circumference side, and a side wall is provided on both sides of the branch channel. This is a liquid redispersion device characterized in that a side wall having a large number of overflow ports is provided, and a downward protrusion is provided on the lower surface of the branch body.

Although the liquid redispersion device of this invention can be constructed from various materials such as metal, it is particularly preferable to construct it from ceramics because it is easy to manufacture and has high corrosion resistance. When constructed with this ceramic, the overflow ports bored on both side walls of the branch flow path are
It is even more preferable to use a cut groove shape that opens upward, since it is easier to manufacture.

(Function) The liquid redispersion device of this invention is arranged between the upper packing layer and the lower packing layer in the column, and is arranged between the outer periphery of the annular body and the inner wall surface of the column and/or the lower surface of the annular body. A packing is interposed between the annular body and the flange protruding from the inner wall surface of the tower that supports the annular body.
The liquid passing through the upper packing layer and flowing down along the inner wall of the column flows into the annular channel on the top of the annular body and is collected, flows into the branch channel, and overflows the overflow port on the side wall. , flows down along the outer surface of the side wall of the branch channel, all or part of this fluid flows down along the protrusion and falls downward from the tip of the protrusion, and the rest flows directly downward from the outer surface of the side wall or the lower surface of the branch body. Fall. This overflow flow rate is almost uniform at each position of the branch flow path, and the protrusions guide the fluid downward and suppress the fluid from moving laterally along the lower surface of the branch body, so the fluid flows almost uniformly from each part. It falls onto the lower packing layer at a constant flow rate, achieving uniform dispersion. In addition, part of the liquid that drops directly from the upper packing layer falls into the branch flow path, and the other part passes through the space between the branch bodies and falls directly onto the lower packing layer.

(Embodiment) An embodiment of this invention will be described below with reference to FIGS. 1 to 5.

In the figure, 1 is an annular body, which has an outer diameter smaller than the inner diameter of the column 12 to be installed by a small amount of clearance, and a side wall 2 is provided on the inner diameter side, and the upper surface of the annular body 1 has a horizontal wall. An annular flow path 3 is formed. Also 4
are branched bodies connected to the inner diameter side of the annular body 1, and have four straight rod parts 4a whose one end is integrated with the annular body 1.
and an annular portion 4b integrated with the other end of the straight rod portion 4a. Side walls 5 are provided on both edges of the upper surface of the branch body 4.
is provided, and a linear branch channel 6a and an annular branch channel 6b are formed on the upper surface of the branch body 4. As shown in FIG. 2, the branch channels 6a and 6b have the same substantially U-shaped cross-sectional shape with an open top, and as shown in FIG. A large number of (overflow ports) 7 are provided. Note that the lower end edge 7a of the cut groove 7 is spaced apart from the upper surface of the branch body 4 by a short distance h. In addition, on the lower surface of the branch body 4,
A lower side wall 8 extending downward from both side walls 5 is connected to the lower side wall 8, and this lower side wall 8 is also provided with cut grooves 9 that open downward and a large number of comb-like protrusions 10 are formed therein. The redispersion device 11 having the above configuration is made of porcelain, and is molded by an integral casting method and then fired.

As shown in FIG.
Install between 4. FIG. 4 shows the structure of the mounting part, in which the redispersion device 11 is mounted via an annular packing 16 on a ring-shaped flange 15 that protrudes inwardly and is held by the flange connection part of the tower 12. However, a packing 17 is also filled between the outer periphery of the annular body 1 and the inner wall surface 12a of the column 12. The liquid passing through the upper packing layer 13 and flowing down along the inner wall surface 12a of the column 12 is sealed by the packings 16 and 17 and flows into the annular flow path 3. This liquid is then transferred to the branch channel 6 (general term for the branch channels 6a and 6b).
It flows into the interior, overflows the cut groove (overflow port) 7 of the branch flow path 6, flows down along the outer surfaces of the side wall 5 and the lower side wall 8, is guided by the protrusion 10, and flows from the lower end of the protrusion 10. It is uniformly distributed on the filling layer 14.

This invention is not limited to the above embodiments; for example, the gasket for sealing between the annular body 1 and the column 12 may be either one of the gaskets 16 and 17; Side walls 2 may be provided on both sides of one annular flow path 3. Furthermore, as an overflow port bored in both side walls of the branch flow path 6,
In addition to the cut groove 7 described above, an elongated hole or a round hole may also be used. Further, as the protrusion provided on the lower surface of the branch channel, a comb-shaped protrusion 10 similar to the above embodiment may be provided at the center of the branch body 4 as shown in FIG. It is also possible to use a partition wall-like protrusion with no partition wall or a plurality of hemispherical protrusions. In these cases, a portion of the fluid overflowing from the cut groove 7 falls from the lower ends of the side walls 5.
The other parts move laterally along the lower surface of the branch body 4, but are guided downward by the protrusions of each shape mentioned above and are prevented from moving laterally, so that even if the branch body is not strictly horizontal, the falling flow rate distribution is almost uniform without being biased. Dispersion takes place. Further, the planar shape of the branch flow path 6 can be made into various shapes other than those described above, such as being composed of only the straight bar portion 4a.

(Effects of the invention) As explained above, according to this invention, liquid collection and dispersion can be performed using one small and compact redispersion device, so the installation space is small and the tower height is small. It is economical because it can be done easily. Further, the liquid on the branch body is uniformly distributed by the overflow port provided on the side wall and the protrusion provided on the lower surface of the branch body, which contributes to improving the gas-liquid contact efficiency of the column.

[Brief explanation of the drawing]

1 to 5 show an embodiment of this invention, FIG. 1 is a plan view of the redispersion device, and FIG.
3 is a sectional view taken along line A-A in the figure, FIG.
5 is a schematic sectional view of the tower showing the installed state, FIG. 6 is a view equivalent to FIG. 4 showing another embodiment of this invention, and FIG. 7 is still another embodiment of this invention. FIG. 2, FIG. 8, and FIG. 9 are schematic cross-sectional views of a column showing an example of a conventional redispersion device. 1... Annular body, 2... Side wall, 3... Annular channel,
4... Branch body, 5... Side wall, 6... Branch flow path, 7
... Cut groove (overflow port), 8 ... Lower side wall, 9 ...
Cut groove, 10...Protrusion, 11...Redispersion device, 1
2...Tower.

Claims (1)

[Claims for Utility Model Registration] 1. A branch in which a horizontal annular flow path is provided on the upper surface of an annular body having an outer diameter smaller than the inner diameter of the column, and a horizontal branch flow path that communicates with this annular flow path is provided on the upper surface. a body connected to the inner diameter side of the annular body, the annular flow path is provided with a side wall at least on the inner circumference side, and side walls having a large number of overflow ports are provided on both sides of the branch flow path. In addition, a liquid redispersion device characterized in that a downward protrusion is provided on the lower surface of the branch body. 2. The liquid redispersion device according to claim 1, wherein the overflow port is a cut groove that opens upward. 3 Utility model registration claim 1 in which the protrusions are a number of comb-like protrusions formed by cutting grooves that open downward into the lower side wall extending downward from both side walls of the branch flow channel. The liquid redispersion device according to item 1 or 2.