The method of gas / liquid contact

 

The method of gas / liquid contact relates to a method of gas / liquid contact to conduct heat and mass transfer processes for systems of gas (vapor)- liquid, can be used in gas, oil, chemical and other related industries, particularly in distillation, absorption columns, absorbers adsorption of hydrocarbon gases, and includes countercurrent contacting of gas and liquid, the distribution of the gas streams on the surface of the sheets parallel to the inclined flow and direction of these flows in mirror image on the surface of the adjacent sheets, arranging on the surface of leaves uneven (wave) streams of gas, aimed at an angle to the flow of gas and liquid flows, work at the intersection of the two gas streams with inclined flow liquid liquid extraction and contacting it with the gas. In places aspirating carry out oscillation of the inclined fluid flows two directional angle of the gas flows. The proposed method allows you to create additional zones of contact in the regular nozzles. 1 C.p. f-crystals, 3 ill., table 1.

The invention relates to a method of gas / liquid contact DLI, oil, chemical and other related industries, particularly in distillation, absorption columns, absorbers adsorption of hydrocarbon gases.

The known method of gas / liquid contact in countercurrent flow to the nozzle of the firm "Sulzer" (U.S. patent 4643853, NCI 261-112, 1987), in which the vertically mounted plates with oblique corrugating contact protruding corrugations with each other, are irrigated from above the liquid, and the bottom channels of the corrugation gas. The fluid which is distributed into the channels of the corrugation, wetted sheets, and the gas moves from both sides of each sheet, is distributed through the channels of the corrugation in one direction countercurrent to the liquid, which results in mass transfer between liquid and gas flows. The pressure between adjacent sheets and channels is aligned with passage of gas and liquid through the holes or perforation made in the leaves.

The disadvantages of this method include the following: - the movement of gas through the corrugation of the sheet on each side is in the same direction, which increases the hydraulic resistance to the flow of gas when the outlet on the wall or on the adjacent transverse sheet (or acetoine channels bumps on one sheet with two sides, the second (perekreschivayutsya) in the direction of arrangement of the corrugation channels on adjacent leaf tips.

This flow affects the distribution of gas and liquid over the cross section mass transfer element and impairs mesopredator, increases the hydraulic resistance of the gas stream.

These drawbacks are partially eliminated in the closest to the proposed invention is the method of contact of gas and liquid in the regular nozzle recruited from parallel sheets with tabs (patent RF 2113900, IPC 6 01 J 19/30, 1997 - prototype), arranged at an angle from the vertical and directed on the surfaces facing each other, in opposite directions. This method is the separation of gas and liquid flows, moving between adjacent sheets, into two streams, which move along the surface of each of adjoining sheets at an angle to each other, thereby reducing the flow resistance to the gas flow when the stress it on the wall of the machine or transverse sheet (or package) of the nozzle. With each side of the sheet is formed intersecting the gas flow as the gas permeates through the permeable tabs (bundles) through which flows a liquid stream, which also is mesopredator.

The disadvantage of this method is the distribution of the flow of gas and liquid only along the ridges, because the transverse flow of gas passing through the burn is minor, not allowing a uniform distribution of gas and liquid over the cross section mass transfer element and, consequently, degrades mesopelagic and increases the hydraulic resistance of the gas stream.

The invention solves the problem of increasing the efficiency of heat and mass transfer in separation of multicomponent mixtures and reduce the hydraulic resistance of the gas by repeatedly aspirating the ledge of the nozzle and contacting it with a gas flow directed along and across ledges.

To achieve the mentioned technical result in the proposed method, the gas / liquid contact, including countercurrent contacting of gas and liquid, the distribution of the gas streams on the surface of the sheets parallel to the inclined flow and direction of these flows in mirror image on the surface of the adjacent sheets, on the surface of the leaves create uneven (wave) streams of gas are directed at an angle to the flow of gas and liquid flows, and at the intersection of two streams of hidcote carry out oscillation of the fluid flows two directional angle of the gas flows.

Organization on the surface of leaves uneven (wave) streams of gas are directed at an angle to the gas flow and parallel them to flow, the fluid withdrawal at the intersection of the two gas streams with inclined flows of liquid and contacting it with the gas allowed to spend the fragmentation of the liquid gas flows with a frequency of oscillation determined, for example, the design of the nozzle, and thereby to increase the efficiency of mass transfer between the gas and liquid flows.

The implementation of the fluctuations of fluid flow in the places of its selection directed at an angle to each other the gas flows further improves the efficiency of the method of contact of gas and liquid due to variations of fluid flow propagation in the environment tab leaves the nozzle and push drain with them.

The applicant does not know the ways of the gas / liquid contact on a regular nozzles, in which the efficiency of heat and mass transfer, reduction of hydraulic resistance on gas and improve the flow distribution was achieved as stated above.

The proposed method is illustrated by diagrams of the distribution of gas and liquid in the regular nozzle.

In Fig. 1 presents a scheme R is the nozzle, sheets are made with protrusions in the form of perezhityh porous harness.

In Fig. 2 shows a diagram of the distribution of gas and liquid on the surface of a single sheet of regular packing with protrusions in the form of perezhityh porous harness.

In Fig. 3 shows a diagram of the distribution of gas and liquid on the surface of a single sheet of regular packing with protrusions in the form of perezhityh porous harness.

The diagrams of the distribution of gas and liquid (Fig.1, 2, 3) shows the fragments of the regular packing, consisting of vertical sheets 1 with the tabs (for example, mesh harnesses) 2, which are made with peristiani (seals) 3 (Fig.1). In places periti 3 on both surfaces of each of the sheets 1 are channels 4, for movement of gas flows across the ledges (Fig. 3). On the surfaces of the sheets 1 shows the direction of movement of inclined gas streams 5 and intersecting with them oscillating uneven (wave) gas streams 6 (Fig.1, 2). Top and bottom nozzles shows the direction the liquid flows 7 and 8, as well as the direction of movement of the inclined fluid flows 9 on the projections 2 and select from the tabs 2 of fluid flow 10 (Fig.1, 2).

In Fig.3 shows the direction of the flux is.

The flow of fluid (liquid phase) after 7 distribution served on top of the regular nozzle, stretch in the cross section of the apparatus along the surface of the sheet 1 between the projections 2 (Fig. 1), then the part is picked from the sheet 1 by the projections 2 in the thread 9 and provide drain the remaining liquid in the form of a thin film on the surface of the sheets 1 of the nozzle.

In the volume of the nozzle carry out the contacting of the liquid with the ascending flow of gas, which, as the liquid, distribute flows.

The gas streams 5 and fluids 9 (Fig.1, 2) spread on the surfaces of the sheets 1 in parallel to each other: on one side of the sheet 1 gas 5 and the liquid 9 is sent with a slope from left to right, and on the other side of the sheet 1, on the contrary, from right to left.

Arrange on the surfaces of leaves uneven (wave) streams of gas 6, oriented at an angle to the parallel flow of gas 5 and the liquid 9 (Fig.1, 2) on channel 4 (Fig.3) formed on the sheets by periti 3 tabs 2.

At the intersection of the gas streams 5 and 6 with inclined fluid flows 9 make the selection of fluid flow 10 (Fig.1, 2) and contacting it with the gas.

The liquid is taken in the form of streams (stream 10, Fig.1, 2) of the patterns of protrusions 2 and then crushed by the flow of gas 5 and uneven (wave) flow is ora fluid uneven (wave) streams of gas 6 and the gas flows 5, distributed at an angle to the threads 6, and thus ensure the intensification of the flow of the liquid, and consequently, increase mesopredator between gas and liquid.

In the position of the sampling fluid in the plane perpendicular to the propagation of two directed at an angle to each other of the gas streams and liquid streams organize oriented at an angle to each other, the gas flows 11 and 12 and the fluid flow through holes 13 (Fig.3), performed on sheets 1, which allows to improve the distribution of gas in the cross-section mass transfer part and reduce its hydraulic resistance.

This method can be implemented in the nozzle, the tabs on the sheets which can be made of mesh harness, as shown in Fig.1, 2, 3, or wick.

The proposed method can also be implemented using corrugated sheets, the distribution of flows is as follows: principal on inclined channels of the corrugated sheets, and additional angled to the main channels in areas of the liquid collection channels sequentially expanding and Contracting sections.

Thus, the proposed method of contact of liquid and gas helped to create the l angle to each other by the gas flow fluctuations downstream of the liquid, distributed in the structures of the projections, and thereby significantly improve the efficiency of heat transfer between gas and liquid, and by creating additional streams of gas through the cross-section of the nozzle to reduce the hydraulic resistance.

Claims

1. The method of contact of gas and liquid, including countercurrent contacting of gas and liquid, the distribution of the gas streams on the surface of the sheets parallel to the inclined flow and direction of these flows in mirror image on the surface of the adjacent sheets, characterized in that on the surface of the leaves create uneven (wave) streams of gas are directed at an angle to the flow of gas and liquid flows, and at the intersection of the two gas streams with inclined flow of liquid to produce a liquid extraction and contacting it with the gas.

2. The method according to p. 1, characterized in that the position of the sampling liquids carry out oscillation of the inclined fluid flows two directional angle of the gas flows.

 

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FIELD: chemical engineering.

SUBSTANCE: apparatus comprises groups of parallel rectangular plates with corrugated bottom. The ribs of the corrugation are oriented along the flow, and the distance between the plates does not exceed 30 mm. Between the plates, rods or pipes are arranged at an angle 90±15° to the vector of flows. The plates are assembled in groups of parallel plates inclined downstream. The uniform distribution of fluid over the plates when fluid flows from one plate group to another group is provided by means of distributing-overflowing devices.

EFFECT: decreased hydraulic drag.

2 cl, 5 dwg

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