RU96786U1 - CONTACT DEVICE FOR HEAT AND MASS EXCHANGE PROCESSES - Google Patents

Abstract

 1. Contact device for heat and mass transfer processes, consisting of packages deployed relative to each other, made of vertically oriented sheets with protrusions forming channels between the sheets for passage of the contacting phases, characterized in that at the junction of the sheets into a single package doubled sheet thickness. ! 2. Contact device for heat and mass transfer processes according to claim 1, characterized in that on the inner surface of the hexagonal channels there are partitions located at a distance from each other along the entire height of the contact device at a certain angle to a plane perpendicular to the sheet plane.

Description

The invention is intended for carrying out heat and mass transfer processes in a gas-liquid system and can find application in the chemical, petrochemical, metallurgical, energy and food industries.

Known regular nozzle for separation and mass transfer apparatuses [RU 2305596 C1, IPC B01J 19/32 (2006.01)], consists of packages deployed in relation to each other, made of vertically oriented sheets with protrusions forming spacing elements and inclined channels between sheets for passage of contacting phases. On the sheets of at least one pair of nozzle packs, rows of porous tapes of polymer materials are stacked, intersecting with the tabs of the sheets when making them from bundles or located on the tabs when making protrusions in the form of corrugations. Porous tapes are made of perforated polymeric materials with the deposition of particles from materials wetted by a shared phase, and are arranged in rows with a gap to each other at an angle to the horizon or horizontally when making the tape in the form of a comb with the direction of the teeth to the base of the package. Porous tapes can be connected to a source of positive charges. The disadvantage of this device is the complexity of manufacture, since it is necessary to withstand certain angles and spray particles, as well as increased hydraulic resistance due to the large number of obstacles to the gas flow.

The closest in technical essence and the achieved result is a regular nozzle for film heat and mass transfer devices [RU 87103 U1, IPC B01J 19/32 (2006.01)], made of plates oriented vertically with the formation of channels, each of which has the shape of a regular hexagon in cross section , in three non-adjacent corners of which horizontal partitions are installed. The liquid, flowing from top to bottom along the plates in the form of a film, is in contact with the upward flow of gas. During the flow, the liquid, according to the principle of ensuring minimum surface tension, tends to the corners of the hexagonal channels, therefore, partitions are installed along the height of the nozzle, which redistribute the liquid evenly around the perimeter of the channels. The height distance between the partitions is determined on the basis of the tendency of the liquid to the corners of the channels, and depends on its surface tension, with the next highest partitions located in the other three non-adjacent corners. Thus, the liquid moves along the entire surface of the plates in the form of a uniform film, which significantly increases the contact area of gas and liquid. The disadvantage of this device is the complexity of the manufacture of the structure.

The proposed contact device for heat and mass transfer processes consists of packages 1 deployed with respect to each other, made of vertically oriented sheets 2 with protrusions forming channels between the sheets 2 for passage of the contacting phases. Moreover, each channel has a cross section in the form of a regular hexagon. Doubled wall thickness, at the junction of sheets 2, into a single package 1 gives additional structural rigidity. On the inner surface of the hexagonal channels there are partitions 3, which create a swirling structure of the gas stream. The flowing liquid is evenly distributed along the perimeter of the channels, under the action of centrifugal force, the droplets, torn off by the gas stream from the liquid film, settle on it again. Interacting with the gas, the liquid film acquires a swirling motion. Partitions 3 are located at a distance from each other along the entire height of the contact device at a certain angle to a plane perpendicular to the plane of sheet 2. Thus, the liquid moves along the entire surface of the sheets 2 in the form of a uniform film, which significantly increases the contact area of gas and liquid. High speed swirling gas flow significantly increases the mass transfer coefficient, which allows to reduce the height of the apparatus in which this contact device will be installed.

The technical result is to increase the capacity of the apparatus for conducting heat and mass transfer processes in a gas-liquid system, while maintaining a sufficiently high efficiency.

Claims (2)

1. Contact device for heat and mass transfer processes, consisting of packages deployed relative to each other, made of vertically oriented sheets with protrusions forming channels between the sheets for passage of the contacting phases, characterized in that at the junction of the sheets into a single package doubled sheet thickness. 2. The contact device for heat and mass transfer processes according to claim 1, characterized in that on the inner surface of the hexagonal channels there are partitions located at a distance from each other along the entire height of the contact device at a certain angle to a plane perpendicular to the sheet plane.