RU2004302C1 - Mass-exchange plate - Google Patents

Abstract

Usage: for bubbling gas bubbles through a liquid and can be used in chemical, petrochemical, metallurgical and other industries, in ecology in the purification of flue gases of various industries. The inventive mass transfer plate contains a base with contact elements made in the form of a cap of dielectric material and a vertical partition of conductive material connected to a source of electric field 1 il

Description

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The proposed solution relates to mass transfer contacting devices for bubbling gas bubbles through a liquid and can be used in chemical, petrochemical, metallurgical and other industries, in the ecology of flue gases of various industries.

Contact devices for bubbling gas bubbles through a liquid adsorbent are known, including round and tunnel caps, S-shaped elements, bubblers, etc.

A disadvantage of the known contacting devices for bubbling is the formation of large bubbles, their coalescence, which leads to a decrease in surface area and mass transfer rate and, as a consequence, the quality of separation.

The closest technical solution, chosen as a prototype, is a mass transfer column with mass transfer plates, between which there are elements connected to a current source. The disadvantage of this design is the inability to intensify the process of mass transfer in the gas phase, when the main resistance to mass transfer is concentrated in the gas bubbles.

The aim of the invention is to intensify the mass transfer process in the gas phase due to the electric field.

The goal is achieved in that in the mass transfer plate containing the base with contact elements connected to the source of the electric field, each contact element is made of a cap of dielectric material and a vertical partition of electrically conductive material, while the vertical partition is connected to the source of the electric field.

The implementation of the cap of dielectric material prevents premature discharge of the same charged gas flow on the surface of the cap.

The discharge begins during the formation of gas bubbles when they bubble through the edges of the holes or slots in a vertical partition made of an electrically conductive material and connected to an electric field source. In this case, mass transfer from gas bubbles to a liquid occurs in an electric field formed by oppositely charged bubbles and a liquid phase. This intensifies the mass transfer process in the gas phase and thus increases

total mass transfer rate between the gas and liquid phases.

A vertical partition with holes or slots can be made of

metal pipe, metal tape, metal mesh, or fabric made of electrically conductive material, for example carbon fabric, and is tightly attached around the perimeter to the lower edge of the cap of each contact element. Small holes in the mesh or fabric reduce the size of the bubbles and increase the contact surface of the phases, the rate of mass transfer in the gas phase and, as a result

5 intensification of mass transfer between gas and liquid absorbent.

To prevent premature drainage of excess charges from the gas stream and from the liquid phase to the apparatus body

0 or mass transfer plates, they can be made of dielectric or insulated.

The drawing shows a diagram of a mass transfer plate of the proposed design. It consists of a contact element in the form of a round or tunnel cap 1 made of a dielectric material, to the bottom of which a vertical

0 partition 2 (pipe, tape, mesh or fabric) of electrically conductive material using fasteners 3, such as rivets, bolts with nuts, screws, etc. The cap 1 is fixed to the nozzle 4 of the mass5 exchange plate 5 using a stud 6 with nuts 7.8 to adjust the height of its installation relative to the mass exchange plate 5 and the nozzle 4. On a vertical partition 2 (pipe, tape, mesh or fabric)

0 terminal 9 is installed for connection to an electric field source.

The contact element of the mass transfer plate works as follows, Pre-ionized gas with

5 with an excess charge of the same name is supplied through the nozzle 5 under the cap 1, Since the column, the mass transfer plate 4. The nozzle 5 is electrically insulated or made of dielectric material, an excess of the same charge of the gas stream does not drain onto these materials. Terminal 9 on vertical baffle 2 is connected to the pole of a constant current source, which is opposite in sign to the gas flow charge.

The gas stream, sparging through the holes of the vertical partition 2 (pipes, tapes, nets or fabrics), is unloaded on its surface, since the charge of the bubbles has an opposite sign than the charge

vertical baffle 2. There is intense mass transfer between gas bubbles and liquid adsorbent in an electric field, due to a decrease in resistance to mass transfer on the surface of charged gas bubbles.

The design of the contact element of the mass transfer plate in the form of a cap made of dielectric material and a vertical baffle made of electrically conductive material connected to a source of electric field makes it possible to intensify the mass transfer process in the gas phase by 11-40% due to the electric field in which the formation takes place gas bubbles and their rise in the liquid.

(56) Ramm V.M. Gas adsorption. M .: Khimi, 1971, p. 655.

USSR copyright certificate No. 319318. cl. B 01 D 3/32. 1971.

Claims (1)

SUMMARY OF THE INVENTION The stroke element is designed as I MASS EXCHANGE PLATE, containing 5, a pack of dielectric material and a housing with contact elements (vertical partitions made of electrical currents connected to the source (water material, while the vertical electric field is different, the partition is connected to the electric source - chgo, in order to intensify the mass transfer field, the process in the gas phase, each con  o0 about jlo Urobets Liquid -O °  go