JPS5928672Y2 - Liquid distributor in mass transfer tower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Related Field The present invention relates to a liquid distributor in a mass transfer column.

Prior art mass transfer columns (e.g., distillation, rectification or extraction of a component by means of a different extraction or absorption liquid produced by transfer with a gaseous mixture or isotopes from a substance by chemical transfer reactions) It is also possible to separate the elements.

Traditionally, such mass transfer columns have an intermediate distributor for the flowing liquid at regular intervals within the mass transfer column, through which the liquid coming from the edge compartment is collected and further guided to the center of the column. (For example, Japanese Patent Publication No. 42-22442).

Now, as methods for distributing liquid in a mass transfer column, 1) a spray type and 2) a tubular type are known.

The spray type is a method in which a spray nozzle or a pipe with only holes is inserted into the tower, and the liquid is dispersed through the holes.

This method has a drawback in that the liquid dispersion efficiency is poor except in the case of a fixed amount, in other words, the liquid fluctuation range is weak.

In order to increase this dispersion efficiency, it is necessary to have sufficient pressure at the nozzle section, in other words, the pump head must be large enough, and a dispersion distance between the nozzle section and the filling section is required. The problem is that the height of the tower becomes high, and there is also a lot of entrainment (entrainment of droplets), which has a negative impact on the upper part of the tower.

Tubular type For example, the conventional Sulzer type (stand main pipe + arm pipe system) uses a head to uniformly disperse liquid inside the column. The height and the size of the arm pipe were too large, and therefore the vertical projected area was too large, resulting in not only a large pressure drop but also a tower height, which was undesirable.

Purpose of the invention The purpose of the present invention is to provide a liquid distributor for a mass transfer column that is capable of the following matters.

1) Uniform distribution efficiency can be obtained even with large volumes of liquid, 2) Uniform distribution is possible even with uneven flow that is a problem with large volumes, and 3) Compared to conventional tubular type. , the amount of processing is large;
In addition, the height of the distributor can be lowered, and the total height of the column can be lowered.Furthermore, the vertical projected area is smaller than that of the tubular type, and it is more effective in terms of pressure loss (4) compared to the conventional spray type. , to reduce the entrainment phenomenon, 5) to easily change the filling height (high/low side), etc.

Outline of the device Chimney trays are arranged side by side at the bottom of the tray that introduces the liquid supplied from the liquid supply port, and are communicated with each other by a communication pipe.

a trough-like distribution element having baffle plates at both ends; the chimney tray and the distribution element being located on the L-shaped baffle plate; and a guide pipe having a rectifying filling provided at the bottom of the chimney tray. It is characterized by the points made up of.

In the example diagram, 1 is the liquid supply port and the chimney tray 2
The liquid is supplied inside.

The chimney tray 2 is provided with guide pipes 3 to allow liquid to descend to both ends of each element 5.

A special filling 4 (for example, Menpack pp (trade name), Suruga packing) is inserted into the guide pipe 3,
This increases the rectification effect, reduces the liquid gradient in each trough-like distribution element 5 at the bottom, and increases the uniformity level.

A baffle plate 6 (FIG. 2) is provided in the element 5 of the part where the liquid descends from the guide pipe 3, and the liquid is rectified by this.

The trough-like distribution elements 5 are located so as to be evenly distributed over the column cross-section, and each distribution element 5 is connected to a communication pipe 7.
They are connected to each other and measures are taken to prevent drifting.

The bottom of each distribution element 5 is provided with a hole size and number of holes necessary for uniform distribution, so that the liquid is uniformly dispersed.

Fluctuations in liquid volume can be dealt with by the liquid head within the element.

With the above structure, the liquid introduced from the supply port 1 is guided to the chimney tray 2, flows down the guide pipe 3 from the chimney tray, and falls into the distribution element 5.

Filler 4 inside guide pipe 3 and buckle plate 6
rectified and distributed evenly.

The liquid that has fallen into the element 5 is dispersed to the lower part by holes made in the bottom of the element.

Effects According to the present invention, there are distributing elements arranged in parallel at the bottom of the chimney tray that introduces the supply liquid from the liquid supply port, communicating with each other through a communication pipe, and having baffle plates at both ends, and distributing elements arranged on the buckle plate. and a guide pipe having a rectifying filling provided at the bottom of the chimney tray, 1) Even with a large volume of liquid, uniform distribution efficiency is excellent.

2) Even in the case of a large capacity, uneven flow, which is a problem, can be prevented by filling the guide pipe 3 with a filler, contributing to uniform distribution.

3) Compared to the conventional tubular type, the throughput is larger.
The height of the distributor has also been reduced, making it possible to reduce the overall height of the tower.

Furthermore, the vertical projected area is smaller than that of the tubular type, which has the advantage of being more effective in terms of pressure loss.

4) Compared to the conventional spray type, entrainment, that is, droplet entrainment phenomenon, is minimal, and the adverse effect on the upper part of the tower is minimal.

5) Even if there is a future change in the filling height (high or low fall), it is convenient because it can be handled by adjusting the length of the guide pipe.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of the liquid distributor, FIG. 2 is a vertical cross-sectional view of a main part of a guide pipe and an element below it, and FIG. 3 is a perspective view of the liquid distributor. In the figure; 1...Liquid supply port, 2...
Chimney tray, 3...Guide pipe, 4...
...Filling, 5...Distribution niremen l-,6
...Baffle plate, 7...Communication pipe (between elements).

Claims (1)

[Scope of utility model registration request] A chimney tray 2 into which the liquid supplied from the liquid supply port 1 is introduced, and baffle plates arranged in parallel at the bottom of the chimney tray 2 and communicating with each other through a communication pipe 7, and facing each other on both sides. 6 gutter-like distribution elements 5...
..., the chimney tray 2 and the distribution element communicate through a guide pipe 3 located on the baffle plate 6 and having a filling 4 for rectification provided at the bottom of the chimney tray 2. A liquid distributor installed in a mass transfer tower, characterized in that: