SU1224533A1 - Vertical shell-and-tube film-type heat-exchanger - Google Patents

Description

one

The invention relates to heat engineering and can be used in the chemical and petrochemical industries for heating and cooling liquids and gases.

The purpose of the invention is to intensify heat exchange by creating a stable film on the surface of heat exchange and increasing the temperature head in the lower part of the heat exchanger.

FIG. 1 shows a vertical section heat exchanger in FIG. 2 shows section A-A in FIG. one .

The heat exchanger includes a housing 1 inside which is placed a tube bundle 2, inlet 3 and outlet 4 collectors of the pipe medium, inlet 5 and outlet 6 collectors of the annular medium, side inlets 7 and outlet: 8 additional refrigerant and transverse partitions 9 11c film-forming openings

12- 14. In the lower part of the inlet 5 collector of the annular medium there are holes 15 located between the tubes of the beam 2 and having a diameter smaller than the diameter of the pipes.

The diameters of the film-forming holes 13 at the partition 10, located directly below. the outlet pipe 8 of additional refrigerant, larger than the diameters of such openings 14 in all lower partitions 11. The diameters of the openings 12 of all above-arranged partitions 9 are equal to each other and have a size smaller than the diameters of the openings 14 of the lower partitions 11, also equal to each other.

1224533J

The total area of the annular gaps formed by the holes 14 and the tubes of the beam 2 in the partition 10 is 25-30% more than that of the lower partitions 5 of the partition walls 11, which excludes the environment splash shield.

The heat exchanger operates as follows.

Heated fluid through the slots on the upper end of the tube beam 2 flows in the form of a film on their inner surface. Water enters the annular supply manifold and through the holes 15 is evenly distributed along the partitions, washing all pipes of the beam 2 from all sides, which creates conditions for the formation of a stable film flow of water along the outer surface of the pipes. 1, an additional coolant is supplied — air, which, moving at high speed towards the flowing film of water, washes it intensively and, passing through the holes 14, creates a foam layer on the partitions 11, thereby stvu effective heat exchange with water, which results in its vaporization and temperature reduction and, hence, but helpful to increase the temperature difference between the tube and shell side medium. Air saturated with water vapor is discharged through the pipe 8, and the cooled liquid and coolant through the collectors 4 and 6.

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Compiled by O. Akimova L. Veselovska Editor Tehred G. Gerber Corrector S. Cherni

Order 1911/35 Draw 589 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (1)

VERTICAL SHELL-TUBE FILM HEAT EXCHANGER containing a tube bundle, inlet and outlet manifolds of the pipe and annular media, side pipes for supplying and removing additional refrigerant, and transverse partitions in the annulus with film-forming openings around the pipes, different. The fact is that, in order to intensify heat transfer, the partitions are located on both sides of the branch pipe for additional refrigerant, and the diameters of the film-forming holes at the partition located directly under the branch pipe ^ for additional refrigerant are larger than the diameters of the holes for all the lower partitions, and in the lower part of the inlet manifold of the annulus § there are openings located between the pipes and having a diameter smaller than the diameter of the latter. SU <„, 1224533> 1224533 ²