In-tube auto-cleaning antiscale falling-film evaporation device

Abstract

An in-tube auto-cleaning antiscale falling-film evaporation device. A few fluidized cleaning ceramic balls are added into mother liquor. Uniformly-distributed film-forming screws not only realizes automatic uniform distribution of liquid in each heating tube, but also promotes uniform film formation on tube inner walls. Liquid film screws and steam screws mounted in the heating tubes can significantly increase circumferential component velocities of falling-film liquid flow and secondary steam flow, enhance convection heat transfer of the liquid film, reduce the amount of splashing liquid foams falling directly, enable the fluidized ceramic balls to generate centrifugal force so as to tightly adhere to the tube inner walls for effective cleaning and scale prevention. A lower tube case is provided with a secondary steam liquid foam separation structure, and a circulating tank meeting crystallization requirements, and the structure is compact. The fluidized ceramic balls realize circulating cleaning through venturis, and the concentration of the fluidized balls is adjusted through a by-pass valve. Therefore, the evaporation device which can prevent scale formation in heat tube inner walls can realize auto-cleaning high yield and energy saving, meet requirements for long-term continuous production, and is especially suitable for heat pump evaporation.

Description

technical field [0001] The invention relates to an automatic cleaning and anti-scaling falling-film evaporation device in a tube, which relates to the automatic cleaning and anti-scaling and heat transfer enhancement in the tube falling-film evaporation device. It is mainly suitable for falling film evaporators that are prone to fouling in heating tubes, especially for tube-tube falling-film heat pump evaporators that have a significant effect on boiling point rise and are prone to fouling. Background technique [0002] The existing tube-and-tube falling-film evaporator is suitable for evaporating mother liquor as a heat-sensitive material, and is especially suitable for a falling-film heat pump evaporator that does not grow dirt in the heating tube. However, if the material evaporated by the heat pump is a solution whose boiling point rises significantly and is prone to fouling, the fouling will seriously affect its energy-saving efficiency, and the energy-saving advantage ...

AI Technical Summary

Problems solved by technology

[0005] The invention proposes an automatic cleaning and anti-scaling falling film evaporation device in the tube, which can not only solve the problem of dirt cleaning that the existing technology is not suitable for the falling film flow evaporation device in the tube, but also has the advantages of simple structure, easy operation and reliable operation

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