Heat exchange pipe with outside microgroove groups for mechanical steam recompression system

Abstract

The invention discloses a heat exchange pipe with outside microgroove groups for a mechanical steam recompression system. The heat exchange pipe is used for improving the capabilities of outside evaporation and boiling heat transfer of a heat exchange pipe body of the mechanical steam recompression system, and the multiple microgroove groups which are distributed according to a certain rule are formed in the outside of the heat exchange pipe body required to be subjected to heat exchange enhancement in a machining mode or in other processing modes. According to the heat exchange pipe, the outside micro-groove groups have the two functions that 1, liquid can be distributed, specifically, the liquid can be sprayed to the outside of the heat exchange pipe body in a spraying or dripping mode,small micro-grooves are formed in the outer wall surface of the pipe, the liquid can be uniformly spread depending on the surface tension of the liquid, and therefore the effective heat exchange areacan be increased; and 2, the heat exchange capacity can be enhanced, specifically, the research shows that a micro-groove group composite phase heat transfer mechanism has the high-strength evaporation and nucleate boiling combined action, so that the heat exchange capacity can be greatly improved.

Description

technical field [0001] The invention relates to a heat exchange tube with grooves outside the tube, in particular to a micro-groove group heat exchange tube outside the tube used in a mechanical vapor recompression system. Background technique [0002] Evaporation is a process of high energy consumption. Since the secondary steam in the traditional evaporator is condensed and discharged directly, the whole evaporation process needs to consume more fresh steam, circulating water and electric energy. Especially for materials with large processing capacity and low concentration, steam The consumption is quite huge. Compared with the traditional multi-effect evaporation method, the mechanical vapor recompression system does not require additional steam after it is stabilized. By inputting a small amount of adiabatic compression work, the heat grade of the steam is improved, thereby effectively utilizing a large amount of heat of the low-pressure steam. Evaporating 1kg of water ...

AI Technical Summary

Problems solved by technology

[0002] Evaporation is a process of high energy consumption. Since the secondary steam in the traditional evaporator is condensed and discharged directly, the whole evaporation process needs to consume more fresh steam, circulating water and electric energy. Especially for materials with large processing capacity and low concentration, steam The consumption is quite huge

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