SU1239500A1 - Surface-contact heat exchanger - Google Patents

Description

The invention relates to a heat exchange technique and can be used for organizing heat and mass transfer.

The purpose of the invention is to increase the efficiency of the heat exchange process by improving the process of mass exchange of heat exchange fluids.

FIG. 1 shows the proposed heat exchanger, a cross section {in FIG. 2 shows section A-A in FIG. one.

The surface contact heat exchanger includes a housing 1 divided into compartments 2 and 3 for the passage of streams of heat exchanging media passing over 4 with openings 5 in which multilayer grids 6 are installed. The number of grids 6 decreases and the area of the openings of grids 6 increases in the direction of the compartment 2 into compartment 3 through openings 5 in the zone from nozzle 7 to the middle of housing 1, and in the zone from nozzle 9 to mid of housing 1, the second heat exchange medium flows through openings 5 from compartment 3 to compartment 2. Flows of heat exchanging fluids through openings 5 s multilayer grids 6 occurs in the form of droplets 10 or blurred or shock jets.

In connection with a decrease in the available pressure along the heat exchanging media, in order to increase the intensity and equalize the mass transfer pacts, the number of grids 6 in the holes 5 is reduced, and the area of the holes of the grids 6 increases in the direction along the media flows from the periphery to the center of the partition 4, which reduces hydration along the streams to the center from the perimeter resistance of the holes 5,

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fenes 4. The pipes 7 and 8 are attached to the housing 1 for supplying and discharging the heat-exchanging medium into the compartment 2, and the pipes 9 and 10 are attached to the housing 1 for the supply and removal of the heat-exchanging medium into the compartment 3.

The heat exchanger works in the following way.

The heat exchanging medium is supplied according to the scheme of countercurrent one through nozzle 7 into compartment 2, and the second through nozzle 9 into compartment 3, and at the entrance to compartments 2 and 3 both heat exchanging media have the same pressure. In the course of movement of the media through compartments 2 and 3, the pressure they have disposed of due to hydraulic resistances. Therefore, in the zones of compartments 2 and 3 adjacent to the perimeter 4, a pressure differential is created, under the action of which the heat exchange medium flows from A to A

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through which mass transfer occurs.

The presence of grids 6 in the holes x 5 creates multi-jet heat exchanging flows; media, which improves honestly and shortens the mixing time of heat exchanging media.

The design of the heat exchanger allows using rather simple ways using temperature, pressure and flow controllers either to completely eliminate mass transfer, or to provide a drop mass transfer mode or a mode that provides pre-set temperatures for one of the heat transfer media.

Thus, in the proposed heat exchanger, heat exchange is simultaneously provided through the surface of the partition 4 and mass transfer through the openings 5c with the grids 6, which generally increases the efficiency of heat exchange by improving the mass exchange process of heat exchanging media.

500

. section 2 into compartment 3 through holes 5 in the zone from pipe 7 to the middle of housing 1, and in the zone from pipe 9 to the middle of housing 1, the second heat exchanging medium flows through holes 5 from compartment 3 to compartment 2. Flow of heat exchanging media through holes 5 with multi-layered grids 6 occurs in the form of droplets 10 or blurred or shock jets.

In connection with a decrease in the available pressure along the heat exchanging media, in order to increase the intensity and equalize the mass transfer pacts, the number of grids 6 in the holes 5 is reduced, and the area of the holes of the grids 6 increases in the direction along the media flows from the periphery to the center of the partition 4, which reduces the pressure20 equal resistance of the holes 5,

equal resistance of the holes 5,

through which mass transfer occurs.

The presence of grids 6 in the holes x 5 creates multi-jet heat exchanging flows; media, which improves honestly and shortens the mixing time of heat exchanging media.

The design of the heat exchanger allows using rather simple ways using temperature, pressure and flow controllers either to completely eliminate mass transfer, or to provide a drop mass transfer mode or a mode that provides pre-set temperatures for one of the heat transfer media.

Thus, in the proposed heat exchanger, heat exchange is simultaneously provided through the surface of the partition 4 and mass transfer through the openings 5c with the grids 6, which generally increases the efficiency of heat exchange by improving the mass exchange process of heat exchanging media.

Claims (1)

A SURFACE-CONTACT HEAT EXCHANGER containing a housing divided by a partition with openings into compartments for the passage of flows of heat-exchanging media, characterized in that, in order to increase the efficiency of the heat exchange process by improving the process of mass transfer of flows of heat-exchanging media, additionally installed in the holes of the partition multilayer grids, the number of which decreases, and the area of the holes of the grids, respectively, increases in the direction along the flows from the periphery to the center of the partition. Figure 1 * 1239500