SU967501A1 - Contact tray for heat mass exchange apparatus - Google Patents

Description

The invention relates to the instrumental formulation of mass and heat transfer processes in gas (steam) systems. Liquid, and more specifically to contact devices with self-regulating free section for heat and mass transfer devices operating in a wide range of loads for gas (vapor) and liquid.

The known contact plate for heat and mass exchangers, comprising a perforated base with receiving and drain pockets, is equipped with partitioning partitioning walls (rectangular valves with side walls 1}.

A disadvantage of the known contact plate designs is the relatively low efficiency of the heat and mass transfer process due to the formation of complete mixing zones near the receiving and drainage tanks, as well as due to the uneven distribution of the gas (vapor) phase over the cross section of the plate due to the hydraulic gradient increasing with increasing loads and increasing path length fluid.

The purpose of the invention is to intensify the process of heat and mass transfer due to

. elimination of complete mixing zones: near the inlet and drain pockets. The goal is achieved by the fact that the contact plate for heat and mass transfer apparatus, including a perforated base; with receiving and drain pockets, equipped with sectional partitions and square .Q valves with side walls, one side wall of the valve has a height greater than the opposite and is made with a hole mi

It is advisable to provide the side wall with visors Located: above 15 holes 1m.

FIG. 1 image of a contact plate, in plan; in fig. 2 shows section A-A in FIG. If in FIG. 3 - axonmet 20 of the valve, the side wall of which is populated with openings; in fig. 4 akronshetri valve, in which the edge of the hole in the side wall provided with a visor.

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Claims (1)

The plate includes a perforated base 1, fitted with rectangular valves 2 and vertical partitioning walls 3 with openings 4, as well as receiving 5 and drain 30 HOJ1 6 pockets. The rectangular valve 2 consists of an upper wall 7, side walls 8 and 9, the extensions of which can be bent under the perforated base 1 of the tray and are the limiters 10 and 11 of the upper valve position, differing from each other in length. Limiting the valve lift height can also be carried out using any of the known methods. The side wall 8, which is oriented in the direction of movement of the liquid flow, has holes 12. The upper edge of the hole 12 is equipped with a visor 13. The upper wall 7 of the valve 2 is equipped with a guide plate 14, the surface of which faces the perforated base 1 of the plate and is provided with protrusions 15 The height of the side wall 8 can be made increased compared with the side wall 9 (not shown). At low liquid loads, valves with openings 12 in the side walls 8 are located only in the initial and final rows, respectively, close to the receiving 5 and the drain 6 pockets. At medium liquid loads, paws with holes 12 in side stack 8 can be placed through a row, for example, only in even rows. At high fluid loads, all valves 2 contain openings 12 in side wall 8. / In addition, to further increase capacity, rectangular valves 2 with openings 12 in side walls 8 can be oriented in the direction of fluid flow. The plate works as follows. The gas jets escaping through the slits formed when the valve is raised between the guide plate 14 and the perforated base 1, and the fluid flows created by them intensively interact with each other due to the vortex formation between the rows of oppositely directed valves. Part of the gas flow enters the plate through the openings 12 in the side wall 8 of the valve 2 and provides liquid movement across the plate in the direction of the drain pocket, eliminating the complete mixing zone and the hydraulic gradient on the plate. The gas-liquid flow formed on the base 51. hits the vertical partitions 3 on which the droplets are separated from the gas flow. The liquid (gas) that was in contact with the liquid rushes to the overlying plate, and the liquid, passing through the plate, is drained into the SLAY pocket 6. The opening 12 in the side wall 8 of valve 2, the outer surface of which is oriented in the direction of fluid flow, allows due to the use of the kinetic energy of gas (steam) to move the liquid in the direction of the drain to eliminate the zone of complete mixing and hydraulic gradient on the plate, tr increases the efficiency of the plate in the whole range of gas loads (steam ) And liquid. The% visor 13 attached to the edge of the aperture 12 provides horizontal gas injection into the liquid and thereby intensifies the movement of the latter in the direction of the drain pocket and increases the local efficiency of the dish. The different lengths of the limiters 10 and 11 of the upper position of the valve 2 preserve the weight symmetry of the valve disturbed by the opening 12 in one side wall 8 and ensure uniform lifting and lowering of the valve 2 when the plate is in operation. - The economic effect of introducing the proposed plate design on two columns is 200.0 thousand rubles. in year. Claim 1. Contact plate for heat and mass transfer apparatus, including perforated base with receiving and drain pockets, equipped with partitioning partitions and rectangular valves with side walls, characterized in that, in order to intensify the process of heat and mass transfer by eliminating complete mixing zones near the receiving and drain pockets, one side wall of the valve has a height greater than the opposite and is made with openings. . The plate according to claim 1, is distinguished by the fact that the side wall is provided with visors located above the openings. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 341498, cl. B 01 D 3/30, 1972 (prototype), WG 4ir, j (Y CG Y tQ WHY about h / y OOOOOOOOOOOGiOOO 00000000000 in fZ iS and AND g, Fi.Z W. / .