JPH0622430Y2 - Liquid distributor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a liquid distributor arranged in a packed tower such as a distillation tower, an absorption tower, and a reaction tower.

[Conventional technology]

There are various types of liquid distributors, and a typical one is a multi-hole type on pages 81 to 86 of "Separation Technology" Vol. 13 No. 2 (published by Kagaku Kogyo Co., Ltd.). Notch and orifice tubular liquid distribution devices are described.

The multi-hole type liquid distributor described in the above document drops the liquid into the tower through the holes formed in the bottom plate of the tray or trough (water pipe), and this type of liquid distributor is not manufactured. It is easy and cheap, but the number and diameter of the holes are determined by the liquid load, the liquid load range is narrow and it is not suitable for small liquid loads.The cut-out type liquid distributor has a notch (flow port). ), The liquid is dropped into the tower while overflowing. In this type of liquid distributor, the overflow height (distance from the lower end of the notch to the liquid level) must be the same in all notches. The difference in height appears directly in the uneven distribution of liquid,
As the amount of liquid decreases, there is a risk of water shortage at several notches, which is not suitable for a small amount of liquid load.The orifice tubular type liquid distribution device combines liquids once and distributes them again in the tower. However, this type of liquid distributor has a narrow liquid load range.

Further, Japanese Patent Publication No. 61-47561 discloses that the orifice tubular type liquid distributor is improved and the load range of the liquid is expanded. As shown in FIGS. 3 (a) and 3 (b), the liquid distributor described in the publication includes a collecting pipe (vertical pipe) 1, a main pipe that communicates with the lower end of the vertical pipe 1 and extends in the horizontal direction. A branch pipe group 2 is provided at the upper and lower sides of the tower orthogonally to the side of the main pipe and has pores 2A on the lower side. In addition, the liquid can be distributed.

[Problems to be solved by the device]

However, in the liquid distributor described in the above publication, since the vertical pipe 1 is formed by a single pipe, the branch pipe groups 2, 2
In order to allow the liquid 3 to uniformly flow out from each of the pores 2A, 2A, it is necessary to secure a liquid stigma of a certain height or more in the vertical tube 1, and if this minimum required liquid stigma is h, In order to distribute the liquid from both of the two-stage branch pipe groups 2, 2, the height of the vertical pipe 1 must be 2 h or more, and when the n-stage branch pipe group 2 is provided in the height direction, The height of the vertical tube 1 is n
It is necessary to have × h or more, which may not be suitable for a packed tower with a limited height.

Therefore, the object of the present invention is to make it possible to widen the load range of the liquid and to lower the installation height thereof,
It is an object of the present invention to provide a liquid distribution device that can be suitably used in a packed column having a limited height.

[Means for Solving the Problems]

The present invention is a device for distributing a liquid to a packed tower, in which a plurality of tubes having different inner diameters are concentrically arranged in line with the axis of the packed tower to form a vertical tube, Further, a plurality of distribution pipes are provided, and each distribution pipe is composed of a main pipe orthogonal to the axis of the multiple pipe and a plurality of branch pipes communicating with the main pipe and intersecting with the main pipe, and the lower end of each pipe of the multiple pipe. The distribution pipes communicating with the respective main pipes and communicating with the pipes inside the multiple pipes are located at a lower position than the distribution pipes outside the multiple pipes, and the liquid is in the innermost pipes of the multiple pipes. The above object is achieved by providing a liquid distributor characterized in that the liquid flows in and successively overflows to the outer pipe.

[Action]

According to the liquid distributor of the present invention, when the load of the liquid increases, the liquid sequentially overflows from the vertical inner pipe to the vertical outer pipe, and the liquid is evenly and simultaneously distributed over the entire cross section of the tower through a plurality of corresponding distribution pipes. Distribute.

〔Example〕

Hereinafter, the present invention will be described based on the embodiments shown in FIGS. 1 (a), 1 (b) and FIG. 1 (a) and 1 (b) are cross-sectional views showing a liquid distributor according to an embodiment of the present invention. In FIG. 1 (a), the liquid load is small and only a vertical inner pipe is used. FIG. 2B shows a state in which the liquid is distributed through both the vertical inner pipe and the vertical outer pipe, and FIG. One of the distribution pipes in Figures (a) and (b)
FIGS. 3 (a) and 3 (b) are views corresponding to FIG. 1 showing a conventional liquid distributor.

The liquid distributor of the present embodiment is used by being arranged above the packed bed of a packed tower, and the vertical pipe 1 through which the liquid flows down includes a vertical inner pipe 11 and a vertical outer pipe 12 having different inner diameters. The double vertical tubes 1 are concentrically arranged so as to be aligned with the axis of the packed tower (not shown). The vertical inner pipe 11 and the vertical outer pipe 12 are formed with tapers 11A and 12A at their upper ends so as to easily receive the liquid.

Further, the vertical inner pipe 11 and the vertical outer pipe 12 are provided with distribution pipes 21 and 22 which are separately arranged at the lower ends and are horizontally arranged to communicate with each other. The distribution pipe 21 that communicates with the vertical inner pipe 11 and the distribution pipe 22 that communicates with the vertical outer pipe 12 have substantially the same configuration.

Therefore, the distribution pipe 21 communicating with the vertical inner pipe 11 will be described in more detail. The distribution pipe 21 includes a main pipe 21B orthogonal to the axis of the vertical inner pipe 11 and a plurality of branch pipes 21C communicating with the main pipe 21B and intersecting the main pipe 21B. The main pipe 21B is formed slightly shorter than the diameter of the packed tower, and the plurality of branch pipes 21C are parallel to each other as shown in FIG. The diameter of each branch pipe 21C is gradually shortened, and each branch pipe 21C has a circular shape slightly smaller in diameter than the packed column at the tip thereof, and a distribution hole 21A is formed below the branch pipe 21C. Is configured to distribute the liquid 3 to the entire lower portion.

Further, the distribution pipe 21 communicating with the vertical inner pipe 11 is a first pipe.
As shown in the drawing, a distribution pipe 22 communicating with the vertical outer pipe 12 is provided.
Located at a lower position, the liquid 3 flows into the vertical inner pipe 11 of the double pipe 1, overflows the vertical inner pipe 11 and flows into the outer vertical outer pipe 12 to form a distribution pipe 21. Distribution pipe 22
It is configured to distribute the liquid 3 to the entire lower part from both sides.

Next, the operation of the liquid distributor of this embodiment will be described. The liquid 3 flowing down into the vertical inner pipe 11 is divided into the main pipe 21B and a plurality of pipes 21B of the pipe 21 as shown in FIG. 1 (a) and FIG. Via the branch pipes 21C of the plurality of branch pipes 21C are distributed and supplied to the entire lower portion from the respective distribution holes 21A. When the liquid amount of the liquid 3 is large and exceeds the distribution capacity of the vertical inner pipe 11 and its distribution pipe 21, the liquid 3 overflows from the vertical inner pipe 11 and flows into the vertical outer pipe 12, and as described above. It reaches the distribution pipe 22 and is supplied downward from both the distribution pipe 21 and the distribution pipe 22 as shown in FIG. 1 (b).

As described above, the liquid distributor of this embodiment has the vertical inner pipe 11 and its corresponding pipe 2 when the liquid load in the packed column is small.
1, the liquid 3 is distributed, and when the liquid load increases, the liquid 3 is further distributed from the vertical outer pipe 12 and its distribution pipe 22.

In the above embodiment, only the double tube as the vertical tube 1 has been described, but the present invention is not limited to the above embodiment, and if the liquid load increases, a multi-tube is constructed accordingly. This can be dealt with by increasing the number of tubes, and it is also possible to arrange multiple stages in the packed column.

That is, the liquid distributor of the present invention can handle the liquid load amount by increasing the number of pipes having different inner diameters in the multiple pipes while keeping the height of the vertical pipes constant even if the liquid load amount increases. And can be suitably used for a packed column having a limited height.

[Effect of device]

INDUSTRIAL APPLICABILITY The liquid distributor of the present invention can have a wide liquid load range and a low installation height, and can be suitably used for a packed column having a limited height.

[Brief description of drawings]

1 (a) and 1 (b) are cross-sectional views showing a liquid distributor according to an embodiment of the present invention, and FIG. 1 (a) shows that a liquid load is small and liquid is distributed only through a vertical inner pipe. Figure (b) showing the state
Shows a state in which the liquid load is large and the liquid is distributed through both the vertical inner pipe and the vertical outer pipe, and FIG. 2 is FIG.
The top view which shows the distribution pipe in (a), (b), FIG. 3 (a), (b)
1A and 1B are views corresponding to FIGS. 1A and 1B, respectively, showing a conventional liquid distributor. 1; Vertical pipe, 2; Distribution pipe 3; Liquid 11; Vertical inner pipe (pipe), 12; Vertical outer pipe (pipe) 21, 22; Distribution pipe 21A, 22A; Distribution hole 21B, 22B; Main pipe 21C, 22C; Branch pipe

Claims (1)

[Scope of utility model registration request] 1. A device for distributing a liquid to a packed column, wherein a plurality of pipes having different inner diameters are concentrically arranged in line with the axis of the packed column to form a vertical pipe. Further, a plurality of distribution pipes are provided, each distribution pipe is composed of a main pipe orthogonal to the axis of the multiple pipe and a plurality of branch pipes communicating with the main pipe and intersecting with the main pipe. Each main pipe communicates with the lower end and the distribution pipe communicating with the pipe inside the multiple pipe is located at a lower position than the distribution pipe outside the multiple pipe, and the liquid is the innermost pipe of the multiple pipe. The liquid distribution device is characterized in that the liquid distribution device is adapted to flow into the outer pipe and then overflow into the outer pipe.