Mass Transfer during Falling Film Evaporation Based on New Multi-Stage Flash Model

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Siyuan Qie¹  Zheqing Huang¹  Xiaoyu Quan¹  Yongqiang Luo¹  Chunjiang Liu¹ 

[1] School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University

关键词: Mass Transfer;    Irreversible Thermodynamics;    Falling Film;    Multi-Stage Flash;   

DOI  :  10.1252/jcej.14we362

来源: Maruzen Company Ltd

【 摘 要 】

References(17)Based on the studies about the mass transfer of a falling film flow and irreversible thermodynamics, a new multi-stage flash model is proposed to analyze the mass transfer process of falling film evaporation. The evaporation of a falling film is regarded as an interrelated multi-stage flash process in the model, and explains how to save energy during the separation of a binary-component system. By comparing the separation performance of different heating conditions and simulation, the multi-stage flash model is proven reasonable in explaining the mass transfer process of falling film evaporation. In the experiments, the mass transfer efficiency of uniform heating increases over 8% compared with concentrated heating. The multi-stage flash model provides a theoretical basis to improve energy efficiency, and provides a new research approach to analyze the mass transfer of falling film evaporation.

【 授权许可】

Unknown