JPS6147561B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention comprises a mass transfer column having mass transfer sections separated from each other by spaces perpendicular to the axis of the column, through which a liquid and a gaseous medium are transferred to each other. This invention relates to an improvement in a mass transfer column in which a liquid distributor is arranged to direct the liquid exiting one mass transfer section to a mass transfer section disposed below the mass transfer column. It is.

In order to increase the efficiency of this type of apparatus, especially for columns operated under vacuum, the liquid distributor is designed so that the proportion of the column cross section that is blocked by it is as small as possible, so as to reduce the pressure drop of the upwardly flowing gas. A structure is adopted to reduce the
42-22442), but in reality, the liquid distributor portion accounts for 1/2 to 1/3 of the total column height.

An object of the present invention is to provide a mass transfer column which can reduce the height of the column by reducing the height of the liquid distributor, and which can achieve a uniform liquid distribution effect. For this reason, the liquid distributor in the present invention includes a collecting pipe located approximately at the center of the tower, a main pipe communicating with the lower end of the collecting pipe and extending horizontally, and branches perpendicular to the main pipe at multiple locations on the side of the main pipe. It is characterized in that a pipe is provided and a plurality of branch pipes are arranged in a plurality of stages in the vertical direction.

Next, one embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a cross section of the mass transfer column 1,
The mass transfer compartments 2a, 2b are filled with a packing, such as a Luschig ring, or alternatively, for example, with a grooved layer. These mass transfer compartments are separated from each other by spaces 3. The liquid distributor shown in FIGS. 1 and 2 has parallel guide members 4 arranged symmetrically with respect to the diameter of the column and this guide member 4.
It consists of two groups with a receiving gutter 5 connected to the lower part of the trough. The inclined receiving gutter 5 opens into two gutter sills 6 inclined with respect to the center of the tower, and these gutter sluices 6
is opposite the funnel 8 of the collecting pipe 7 of the distribution device.
A main pipe 9 extending horizontally at the lower end of the collecting pipe 7
(Fig. 3) are connected to this main pipe 9, and upper and lower two
Branch pipe groups 10a, 10b, . . . of stages are provided so as to be perpendicular to the main pipe 9. Further, these upper and lower branch pipe groups 10a and 10b are provided so that the upper and lower branch pipes do not overlap when viewed from above, as shown in FIG. Further, the pores of the lower branch pipe group 10a are provided in the lower part thereof,
Even if the amount of liquid collected in the collecting pipe 7 is the minimum, the pore diameter and number of pores are necessary for uniform distribution. On the other hand, the upper branch pipe group 10b... corresponds to the maximum flow rate, and together with the lower branch pipe group 10a..., a thin pipe is provided at the lower side so that the liquid head is as low as possible at the maximum flow rate. The diameter and number of holes 11 and the mounting positions of the branch pipes are determined.

Next, to explain the operating state of the present mass transfer tower, the liquid flowing down from the mass transfer section 2a is received by the guide member 4, guided from there into the receiving trough 5, and further passes through the trough 6 and enters the distribution device. . The liquid that has entered the collecting pipe 7 passes through the main pipe 9 and is transferred to the branch pipe group 10a......
10b... onto the lower mass transfer compartment 2b.

By the way, when the flow rate is large, the lower branch pipe group 10a
In addition, liquid is distributed from the upper branch pipe group 10b, and the head does not rise above a certain value.
On the other hand, even when the flow rate is small, a liquid head exists to ensure uniform distribution from the lower branch pipe group 10a.

Since the present invention has the above-described structure, even when the flow rate fluctuates over a very wide range, that is, when the liquid volume suddenly increases or decreases, the upper and lower branch pipe groups are Since a suitable head can be secured by arranging the liquid distributor, the required height of the liquid distributor can be reduced. Therefore, the total height of the tower can be reduced, and the construction cost of the tower can be saved.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a mass transfer tower according to the present invention;
Figure 2 is an enlarged perspective view of the guide member and gutter part;
FIG. 3 is a view taken along the - arrow in FIG. In the figure; -, 1...Mass transfer tower, 2a, 2b
...Matter transfer section, 3... Space, 4... Guide member, 5... Receiving gutter, 6... Gutter stop, 7... Collection pipe,
8...funnel, 9...main pipe, 10a...lower branch pipe,
10b... Upper branch pipe, 11... (branch pipe) pore.

Claims (1)

[Claims] 1 A plurality of mass transfer sections 2a, 2 spaced apart from each other by a certain distance perpendicular to the column axis
(b) through which the liquid and the gaseous medium flow in opposite directions, in order to direct the liquid exiting from one mass transfer compartment to the mass transfer compartment located below it. The receiving device has a guide member 4 disposed on the cross section of the mass transfer section, and a receiver trough 5 is provided at the bottom of the guide member, in which the liquid is collected. is collected and this liquid is guided as far as possible to the center of the tower, and the liquid coming out from here flows into a liquid distributor,
In the case where the liquid distributor distributes the liquid evenly over the cross-section of the mass transfer section below it, the liquid distributor includes a collecting pipe 7 located approximately in the center of the column.
A main pipe 9 that communicates with the lower end of the collecting pipe and extends horizontally, and an upper branch pipe group 10 that has pores on the lower side in the column vertical direction so as to be orthogonal to the main pipe.
b, and a lower branch pipe group 10a arranged so as not to overlap the upper branch pipe group 10b vertically when viewed from above. Only from the pores of the tube group 10a,
In addition, in areas where the flow rate of liquid is large, the pores in the lower branch pipe group and the pores in the upper branch pipe group 10b have the pore diameter and number necessary for uniform distribution, and the pores are adjusted so that the liquid head is as low as possible. A mass transfer tower characterized in that the diameter and number of pipes and the mounting position of the branch pipes are determined so that the flow rate range of liquid volume can be treated in a large area.