Droplet Evaporation Characteristics of Desulfurization Wastewater During Low-temperature Concentration

QI Jiangping; YANG Zhiguo; LI Dan; QU Xin; MEI Yongping; ZHOU Hao; ZHAN Lingxiao; YANG Linjun

doi:10.19805/j.cnki.jcspe.2025.240172

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Droplet Evaporation Characteristics of Desulfurization Wastewater During Low-temperature Concentration

更新时间：2026-10-10

- Droplet Evaporation Characteristics of Desulfurization Wastewater During Low-temperature Concentration
- Chinese Journal of Power Engineering Vol. 45, Issue 6, Pages: 931-937(2025)
- 作者机构：
  
  1. 新疆天富环保科技有限公司,新疆,石河子,832000
  2. 新疆天富集团有限责任公司,新疆,石河子,832000
  3. 东南大学能源与环境学院, 能源热转换及其过程测控教育部重点实验室,江苏,南京,210096
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240172
  CLC：
- Online First：16 June 2025，
  
  Published：2025
- 稿件说明：
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戚江平,杨志国,李丹,曲欣,梅永平,周浩,詹凌霄,杨林军. 脱硫废水液滴低温浓缩蒸发特性动力工程学报, 2025, 45(6): 931-937 https://doi.

org/10.19805/j.cnki.jcspe.2025.240172
戚江平,杨志国,李丹,曲欣,梅永平,周浩,詹凌霄,杨林军. 脱硫废水液滴低温浓缩蒸发特性动力工程学报, 2025, 45(6): 931-937 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240172.

org/10.19805/j.cnki.jcspe.2025.240172 DOI：

摘要

基于单液滴蒸发实验平台和逆流喷淋低温烟气浓缩装置

对脱硫废水在高湿环境下的浓缩蒸发特性进行了实验研究

探究了烟气湿度、气体流速和水质对废水液滴蒸发特性的影响

研究了废水浓缩蒸发析出的晶体形貌及氯释放特性

以及影响低温烟气余热浓缩过程的关键工艺参数。结果表明:脱硫废水单个液滴低温浓缩蒸发过程可分为收缩、膨胀和结晶3个阶段;随着烟气湿度增加

液滴蒸发速率下降

湿球温度升高

最终结晶程度有所下降;气速增大缩短了液滴收缩段的时间

有利于加快蒸发速率

废水含固量提升将使液滴收缩至最小时的临界粒径增大

同时液滴整体温度上升;提高烟气温度、增大烟气流量和适当增加废水进液流量有利于提高浓缩效率。

Abstract

Experimental study was conducted on the concentration and evaporation characteristics of desulfurization wastewater in a high-humidity environment

based on a single droplet evaporation experimental platform and a counter-current spray low-temperature flue gas concentration device. The effect of gas humidity

gas velocity

and water quality on the evaporation characteristics of wastewater droplets were investigated. The morphology of the precipitated crystals and the characteristics of chlorine release

as well as the key process parameters affecting the low-temperature flue gas waste heat concentration process during wastewater concentration evaporation were studied. Results show that the low-temperature concentration and evaporation process of the single desulfurization wastewater droplet can be divided into three stages: contraction

expansion

and crystallization. As the humidity of the flue gas increases

the evaporation rate of droplets decreases

the wet-bulb temperature rises

and the final degree of crystallization decreases to some extent. The increase in gas velocity shortens the time of the droplet contraction phase

which is beneficial for accelerating the evaporation rate. The increase in solid content in the wastewater will increase the critical particle size when the droplet contracts to its smallest size

while the overall temperature of the droplet rises. Increasing the flue gas temperature

flow rate

and appropriately increasing the wastewater inlet flow rate are beneficial for improving concentration efficiency.

关键词

Keywords

references

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