SU1209244A1 - Countercurrent tray - Google Patents

Description

one

The invention relates to instrumentation of heat and mass transfer processes in a gas (vapor) - liquid system and can be used in the chemical, petrochemical, and other industries, primarily in work with polluted media.

The purpose of the invention is to intensify the process of heat and mass transfer and reduce entrainment by increasing the surface of interfacial contact mainly in coarse plates.

This goal is achieved by the fact that the peripheral zones of the holes are provided with slots, and the areas bounded by the slots are bent upwards at an angle to the plane ta-. One of the edges of the upwardly bent portion may simultaneously be the edge of the aperture.

FIG. 1 shows the proposed plate with tangentially bent bounded slots, a frontal section; in fig. 2 - the same, top view; in fig. 3 - the proposed plate, in which the areas bounded by the slits are bent radially from the center of the hole, the frontal section; in fig. 4 - the same, top view; in fig. 5 - the proposed plate, in which the areas limited by the slits are bent radially to the center of the aperture, the frontal incision; in fig. 6 - the same, top view.

The plate contains a horizontal plate 1 with large apertures 2, the peripheral zones of which have slots 3 and sections 4 bent upwardly limited by slots.

The plate works as follows.

The liquid on the plate comes from the above-lying plate, from the bottom towards the liquid flows the gas stream. Gas pass

ten

five

ZO 2

Dieting through the holes 2 and under the bent sections 4 as a result of the interaction of the phase flows over the plateau 1 a gas-liquid layer is formed. The drain of the liquid from the plate is guided by axial streams mainly through the central zones of the aperture 2, the gas passes into the gas-liquid layer mainly through the slots under the upwardly bent sections 4. The gas, when passing under the unbent sections 4, changes its vertical direction in a direction close to the horizontal. As a result, the height of the gas-liquid layer is reduced, the entrainment of liquid droplets is reduced; during the collision of jets escaping from beneath the bent peripheral parts of adjacent holes, a highly turbulized layer of liquid arises, the surface of the contact of the phases increases, which leads to an increase in the intensity of the heat and mass transfer process. The plate works in emulsification mode.

In the case when the slots limited by the sections 4 are bent tangentially relative to the opening 2, a rotational movement of the gas-liquid flow above each hole is created, which leads to an additional intensification of the heat and mass transfer process.

In the case where the slit-restricted areas 4 are bent radially from the center of the hole 2, gas-liquid jets flowing from the bent sections 4 of the adjacent holes are impacted.

20

In the case where the slit-restricted areas 4 are bent radially toward the center of the hole 2, a collision occurs and the gas-liquid jets emanating from under the bent sections 4 of the hole are intensely turbulized.

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FIG. five

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Claims (4)

1. A counter-flow plate containing a plate with holes, characterized in that, in order to intensify the heat and mass transfer process by increasing the interfacial contact surface and reducing the spray nozzle mainly in large-hole plates, the plate is made with slots located around each hole, and the sections bounded by the slots are bent up . 2. Plate in π. 1, characterized in that the sections limited by the slots are bent tangentially with respect to the hole. 3. Plate in π. 1, characterized in that the areas bounded by the slots are bent radially from the center of the hole. 4. Plate in π. 1, characterized in that the areas bounded by the slots are bent radially toward the center of the hole. ® Tv ...... φαζ.Ι>