Condenser with liquid separation type spiral tube structure

Abstract

The invention discloses a condenser with a liquid separation type spiral tube structure, which belongs to the technical fields of heat exchange and heat transfer. A spiral heat exchange tube is fixed in a shell of the condenser with the liquid separation type spiral tube structure; a liquid guiding tube is distributed on the outer circumference of the spiral heat exchange tube; the upper end of the spiral heat exchange tube is a condensing working substance inlet tube; the lower end of the spiral heat exchange tube is a condensing working substance outlet tube; the upper end of the outer circumference of the shell is a cooling water outlet; and the lower end of the outer circumference of the shell is a cooling water inlet. In a condensing process, a thick liquid film distributed on the side wall surface of the spiral outer circumference is derived in a non-dynamical way by utilizing the combined action of surface tension, capillary force and centrifugal force; a thin liquid film is promoted to transfer heat in a condensation phase change process; and the heat resistance of a condensed liquid film on the side of the outer circumference of a spiral tube is decreased, thereby obviously improving the heat exchange performance on the side of a condensation phase change tube. By using the condenser with the liquid separation type efficient spiral tube, a condensate liquid is separated mainly by means of the centrifugal force and the capillary force without being influenced by gravity, and the condensation heat exchange coefficient can be obviously improved both in a ground environment or a microgravity environment.

Description

technical field [0001] The invention belongs to the technical field of heat exchange and heat transfer, in particular to a condenser with a liquid separation spiral tube structure. Background technique [0002] A large amount of low-grade waste heat (such as flue gas waste heat, steam waste heat, etc.) released in industrial processes needs to be utilized, and its heat mainly includes sensible heat and latent heat. Taking the flue gas of a coal-fired boiler as an example, the volume share of water vapor is about 8%, and the latent heat carried accounts for about 30% of the total waste heat. It accounts for about 65% of the total waste heat; it can be seen that the use of condensation heat exchange technology to recover latent heat in waste heat can greatly improve the utilization rate of heat energy recovery. [0003] At the same time, compared with the general straight tube shell-and-tube heat exchanger, the spiral tube heat exchanger has the advantages of large heat trans...

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Problems solved by technology

[0005] At present, the research on enhanced condensation heat transfer at home and abroad mainly focuses on the research on smooth straight tubes or straight tubes with inner fins, inner spirals, and inner grooves, but the enhancement of condensation phase change heat transfer in spiral tubes has not been reported yet.

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