Experimental Study on Evaporation and Crystallization of Brine Droplets andDevelopment of Its Reaction Engineering Approach Model

ZHANG Bin; GUO Penghua; NIU Yangeng; ZOU Hansen

doi:10.7652/xjtuxb202312011

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Experimental Study on Evaporation and Crystallization of Brine Droplets andDevelopment of Its Reaction Engineering Approach Model

更新时间：2025-07-09

- Experimental Study on Evaporation and Crystallization of Brine Droplets andDevelopment of Its Reaction Engineering Approach Model
- Vol. 57, Issue 12, Pages: 110-119(2023)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202312011
  CLC： TK121
- Online First：10 December 2023，
  
  Published：2023
- 稿件说明：
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ZHANG Bin, GUO Penghua, NIU Yangeng, et al. Experimental Study on Evaporation and Crystallization of Brine Droplets andDevelopment of Its Reaction Engineering Approach Model[J]. 2023, 57(12): 110-119.
DOI：

ZHANG Bin, GUO Penghua, NIU Yangeng, et al. Experimental Study on Evaporation and Crystallization of Brine Droplets andDevelopment of Its Reaction Engineering Approach Model[J]. 2023, 57(12): 110-119. DOI： 10.7652/xjtuxb202312011.

摘要

为建立适用于盐水喷雾蒸发数值模拟的单液滴蒸发模型

开展了NaCl溶液的单液滴蒸发析晶研究。首先

搭建了可同时测量液滴质量、温度、粒径的单液滴蒸发可视化实验平台

基于液滴的流致振动特性

提出了利用低通滤波改善振动信号对质量测量影响的方法; 其次

开展了初始质量分数为10%的NaCl溶液液滴蒸发实验

明确了盐分析出对液滴温度、粒径和蒸发率的影响规律; 最后

基于实验数据

获得了相对活化能和无量纲粒径随液滴干基含水率的变化关系

并建立了NaCl溶液液滴的反应工程法模型。数值模拟结果表明:所提模型预测结果的最大相对误差小于8%。该实验平台可为含析出性溶质液滴干燥过程中的质量测量提供重要借鉴

所提出的反应工程法模型也可用于NaCl溶液喷雾干燥的大规模高效数值计算。

Abstract

To establish a droplet evaporation model for the numerical simulation of brine spray evaporation

the evaporation and crystallization processes of brine droplets were investigated. Firstly

a single droplet evaporation visualization experimental platform was built to simultaneously measure the variations in droplet mass

temperature

particle size and morphology during the evaporation. Based on the flow-induced vibration characteristics of the droplet suspension device

the low-pass filtering method was proposed to eliminate the influence of vibration signals on mass measurement. Secondly

the evaporation experiment using 10% NaCl droplet was carried out to investigate the influence of the salt crystallization process on the droplet temperature

particle size and evaporation rate. Finally

based on the experimental data

the droplet's relative activation energy and dimensionless particle size as a function of the dry basis water content were calculated to establish the reaction engineering approach model. A maximum deviation of less than 8% was observed in the numerical validation. The experimental platform can provide an important reference for mass variation measurement during the drying of droplets with precipitate. The proposed reaction engineering approach model can be applied in the high-efficiency numerical simulation of the spray drying of NaCl solution.

关键词

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references

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