SU1639704A1 - Mass-transfer column - Google Patents

Abstract

The invention relates to the design of a rotary mass transfer column and can be used in the chemical, food and other industries. The aim of the invention is to increase efficiency by increasing the residence time of the gas at the contact stage. The mass exchange of the column contains a cylindrical case with branch pipes for input and output of phases, with plates mounted in it equipped with gas ducts installed at an angle of 10-30 ° to the plane of the tray by spraying fluids and droplets in the form of vertical plates located against the wall of the housing. The drain plate together with the sprayer and the drip catcher is a contact element of the rotor mass transfer column. With the passage of gas (vapor) through the contact element, the interaction of the contacting phases occurs in the free volume of the contact element. The interfacial contact surface is formed when the liquid is dispersed by the spray into jets and drops. 4 il. sl C

Description

The invention relates to the chemical, pharmaceutical, food and related industries and can be used in the absorption purification of industrial gases and for vacuum distillation of thermolabile mixtures.

The purpose of the invention is to increase the efficiency of the column by increasing the residence time of the gas (vapor) phase at the contact stage.

Figure 1 shows the column, vertical section; figure 2 - section aa in figure 1; on fig.Z - section BB in figure 1; on

Fig. 4 shows rectangular profile gas ducts (radial walls inclined at an angle of 10-30 ° to the plane of the tray).

The column includes a housing 1, a drain plate 2, a drip tray 3 in the form of vertical plates and a spray 4 liquid, the rotor 5.

The column works as follows.

The flow of gas (steam), falling into the ducts of the drain plates 2 due to the inclination of the radial walls, acquires the direction of movement at an angle of 10-30 ° to the plane of the drain plate. As a result of this time

about with

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the presence of gas (steam) on the contact element increases. When the gas moves in countercurrent to the flare of dispersed liquid, the hydraulic resistance of the contact element increases, however, the counterflow is most effective from the point of view of the processes of absorption and rectification. When the gas is flowing, the gas moves after the flare of the dispersed liquid, and the hydraulic resistance of the contact element is significantly lower than with a countercurrent. The contact time of a drop of liquid in flight is longer, which also provides an increase in the efficiency of absorption and rectification processes.

The swirling movement of the gas flow (steam) increases the separation of fine droplets on the body of the apparatus and the wall drip trap.

The use of ducts with inclined radial walls will increase the residence time of the gas (vapor) phase in the rotor column and the velocity of the gas (steam) in

free section of contact elements In addition, the failure of the working fluid from the top tray to the bottom is reduced. As a result, the efficiency of the rotor column increases, the apparatus load on the gas (vapor) phase increases, and the operational stability of the contact elements increases.

Claims (1)

Invention Formula A mass transfer column containing a cylindrical body with inlets and outlets for the phases, a rotor with drain plates mounted into the body, equipped with gas ducts located on the plates, liquid dispensers and droplet separators located near the wall of the casing, characterized in that, in order to increase the efficiency of the rotor column by increasing the residence time of the gas phase at the contact stage, the radial walls of the ducts are set at an angle of 10-30 ° to the plane of the tray. 3 FIG. Have