SU1623680A1 - Contact heat and mass exchanger - Google Patents

Abstract

The invention relates to the field of instrumentation of heat and mass transfer processes in gas (vapor) - liquid with heat supply or heat transfer systems and can be used in chemical and some other related industries. The purpose of the invention is to intensify the heat process.

Description

The invention relates to a technique for heat and mass transfer processes in systems gas (vapor) is a liquid with heat input or heat in the zone of contact between phases and can be applied in chemical and some related industries.

The purpose of the invention is to intensify the process of heat and mass transfer due to vortex rebuilding of the flows of interacting phases and creating a film mode of fluid movement on the surface of the tubes of contact elements.

The drawing shows a contact heat and mass transfer device, a longitudinal section,

 The device consists of a horizontal base 2 fixed in the case I of the column with through-perforation covered by several rows of holes 3, the diameter of which is 50-300 mm, perforated sleeves 4 fixed in the holes 3, and flexible polymer tubes 5 passed through perforation in the base 2 or through the perforation of the sleeves 4 with the formation of a cap over the base 2, the upper part of which is flat or spherical, and the lateral surface has a cylindrical shape. The free ends of the tubes 5 are located below the base 2, the diameter of the perforation of the base 2 and the sleeves 4 is 10-80% higher than the outer diameter of the tubes 5, and the height of the cap formed by the tubes 5 is

five

0

five

0

five

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five

50-350 mm. The side surface of the cap is intertwined with heat exchange tubes 6 by alternating passages between the tubes 5. The ends of the tubes 6 from each cap are combined into bundles and connected through manifolds 7, fixed in unions 8, to an external heat transfer system (outlet). In the upper part of the caps can be installed flat covers 9.

Contact heat and mass transfer device operates as follows.

The liquid phase from the evaporating contact stage enters the horizontal base 2 fixed in the housing 1 of the column and interacts with the upward vapor-gas flow. In this case, below the level of the base 2, the phases are in contact in the film mode of motion of the liquid flowing along the walls of the tubes 5. A part of the liquid is picked up by the vapor – gas flow passing through the apertures 3 and the perforations in the base 2 or the sleeves 4, and is carried into the internal volume of caps changing the direction of motion of the two-phase mixture, accompanied by active vortex formation, followed by separation on the walls of tubes 5 and 6. The presence of flat kryishk 9 in the upper part of caps contributes significantly to the prevention loss of liquid. Thus, at each contact stage, a two-level interaction of the phases takes place, which significantly intensifies the process of heat and mass transfer. At the same time, it is possible to carry out the process in the most advantageous thermal mode, which is achieved by supplying or discharging the required amount of heat through the walls of heat exchange tubes 6, the ends of which are bundled together with collectors 7 fixed in nozzles 8. After passing through the contact zone, the liquid phase flows down to the underlying base to further interact with the upward flow of the gas mixture,

Claims (4)

Invention Formula I, Contact heat and mass transfer device, including a horizontal base with cylindrical holes and contact elements consisting of flexible polymer tubes, characterized in that, in order to intensify the heat and mass transfer process due to the vortex formation in the flows of the interacting phases and the creation of film mode the movement of the liquid on the surface of the tubes of the contact elements, the tubes are passed through a perforation made at the base covering several rows of cylindrical holes, forming caps over the base, the upper part of which is made flat or spherical, and the lateral surfaces have a cylindrical shape the ends of the tubes are located on one side of the base, 2, the apparatus according to claim 1, about 1 ton and 5 such that perforated sleeves are fixed in the holes of the base, wherein the diameter of the perforations of the sleeves is larger than the outer diameter of the tubes. 0 3. The device in PP. 1 and 2, which are due to the fact that the tubes of the contact elements of the ascending branch are passed through the perforations of the sleeves, and the downward petwiches through the central holes of the sleeves. 4. The device according to PP. 1-3, which is based on the fact that the vertical sections of the tubes are intertwined with tubes missed with a constant pitch.