Chloride Migration, Transformation Behavior and Risk Assessment During Evaporation of Desulfurization Wastewater

QI Hongfeng; ZHAO Ning; CHEN Heng; YANG Linjun

doi:10.19805/j.cnki.jcspe.2025.240631

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Chloride Migration, Transformation Behavior and Risk Assessment During Evaporation of Desulfurization Wastewater

更新时间：2026-10-10

- Chloride Migration, Transformation Behavior and Risk Assessment During Evaporation of Desulfurization Wastewater
- Chinese Journal of Power Engineering Vol. 45, Issue 11, Pages: 1932-1939(2025)
- 作者机构：
  
  1. 广州中电荔新热电有限公司,广东,广州,511340
  2. 南方电网电力科技股份有限公司,广东,广州,510623
  3. 浙大宁波理工学院机电与能源工程学院,浙江,宁波,315000
  4. 东南大学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.2025.240631
  CLC：
- Online First：17 November 2025，
  
  Published：17 November 2025
- 稿件说明：
移动端阅览
漆洪峰,赵宁,陈恒,杨林军. 脱硫废水蒸发过程中氯迁移转化行为及风险评估动力工程学报, 2025, 45(11): 1932-1939 https://doi.

org/10.19805/j.cnki.jcspe.2025.240631
漆洪峰,赵宁,陈恒,杨林军. 脱硫废水蒸发过程中氯迁移转化行为及风险评估动力工程学报, 2025, 45(11): 1932-1939 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240631.

org/10.19805/j.cnki.jcspe.2025.240631 DOI：

摘要

脱硫废水热烟气蒸发技术可实现电厂废水零排放

但在蒸发过程中

废水中氯离子容易重新释放至烟气中

导致其在脱硫废水中循环富集。基于此问题

分别采用单液滴蒸发装置和旋转喷雾蒸发实验台对脱硫废水蒸发过程中氯离子的迁移转化行为进行研究。结果表明:氯的释放过程主要分为3个阶段

即自由水分蒸发阶段、壳层不稳定阶段以及壳层热解阶段

其中在自由水分蒸发阶段

脱硫废水中自由态H

容易与Cl

结合生成HCl

而在壳层热解阶段

MgCl

O的热解是造成HCl释放的主要原因;较高的烟气温度会导致较高的氯气态释放占比;当废水调至弱碱性(pH≈9)时

可有效减少气相氯释放;在较高的蒸发气液比下

干燥塔内温度水平有所提高

导致气相氯释放占比较高;从目前已实施热烟气蒸发工艺的电厂来看

粉煤灰中氯含量虽有所增加

但电厂粉煤灰综合利用基本未受影响。

Abstract

The evaporative technology for desulfurization wastewater can achieve zero discharge of wastewater from power plants. However

during the evaporation process

chloride ions in the wastewater can easily be released into the flue gas

leading to their cyclic enrichment in the desulfurization wastewater. This study investigated the migration and transformation behavior of chloride ions during the evaporation of desulfurization wastewater using both a single droplet evaporation device and a rotary spray evaporation experimental setup. Results show that the release process of chloride can be divided into three stages: the free water evaporation stage

the shell instabi

lity stage

and the shell pyrolysis stage. In the free water evaporation stage

free H

ions in the desulfurization wastewater tend to combine with Cl

ions to form HCl. In the shell pyrolysis stage

the thermal decomposition of MgCl

O is the primary reason for HCl release. Furthermore

higher flue gas temperatures lead to a higher proportion of gaseous chlorine release. Adjusting the wastewater to a weak alkaline condition (pH≈9) can effectively reduce gaseous chlorine release. At a higher gas-to-liquid ratio during evaporation

the temperature level in the drying tower increases

resulting in a higher proportion of chlorine release. From the perspective of power plants that have implemented thermal flue gas evaporation processes

although the chlorine content in fly ash increases

the comprehensive utilization of fly ash from power plants remains largely unaffected.

关键词

Keywords

references

王铭玮, 肖海平, 吴海涛, 等. 石灰石法与氨法脱硫产物中痕量元素对比[J]. 动力工程学报, 2024, 44(2): 301-306, 338. WANG Mingwei, XIAO Haiping, WU Haitao, et al. Comparison of trace elements in desulfurization products by limestone method and ammonia method[J]. Journal of Chinese Society of Power Engineering, 2024, 44(2): 301-306, 338.

陈鸿伟, 王广涛, 王朝阳, 等. 废水液滴蒸发的关键影响因素分析[J]. 动力工程学报, 2019, 39(4): 324-330. CHEN Hongwei, WANG Guangtao, WANG Zhaoyang, et al. Analysis of key factors affecting the evaporation of wastewater droplets[J]. Journal of Chinese Society of Power Engineering, 2019, 39(4): 324-330.

李飞. 旋转雾化蒸发技术对脱硫废水和烟气的适应性研究[J]. 中国电力, 2021, 54(4): 213-220. LI Fei. Study on the adaptability of rotary atomization evaporation technology to desulfurization wastewater and flue gas[J]. Electric Power, 2021, 54(4): 213-220.

马双忱, 陈嘉宁, 刘宁, 等. 低温烟气余热浓缩脱硫废水实验研究与探讨[J]. 动力工程学报, 2020, 40(1): 51-57, 64. MA Shuangchen, CHEN Jianing, LIU Ning, et al. Experimental study on the concentration of FGD wastewater using low-temperature flue gas[J]. Journal of Chinese Society of Power Engineering, 2020, 40(1): 51-57, 64.

白炎武, 刘平元, 陆启亮, 等. 脱硫废水烟道蒸发技术蒸发特性实验研究[J]. 动力工程学报, 2019, 39(2): 135-141. BAI Yanwu, LIU Pingyuan, LU Qiliang, et al. Experimental research on evaporation characteristics of desulfurization wastewater by flue evaporation treatment[J]. Journal of Chinese Society of Power Engineering, 2019, 39(2): 135-141.

杨建国, 耿梓文, 袁伟中, 等. 燃煤烟气脱氯实现脱硫废水零排放技术及其影响[J]. 中国电机工程学报, 2018, 38(9): 2657-2664. YANG Jianguo, GENG Ziwen, YUAN Weizhong, et al. The technology of coal-fired flue gas dechlorination for realizing zero-discharge of desulfurization wastewater and its influences on boiler[J]. Proceedings of the CSEE, 2018, 38(9): 2657-2664.

马双忱, 向亚军, 陈嘉宁, 等. 高盐脱硫废水水泥化固定基础实验研究[J]. 动力工程学报, 2019, 39(9): 740-746. MA Shuangchen, XIANG Yajun, CHEN Jianing, et al. Experiment study on cement-based solidification of high-salt desulfurization wastewater[J]. Journal of Chinese Society of Power Engineering, 2019, 39(9): 740-746.

张娟, 刘平元, 吉顺健, 等. 燃煤电厂脱硫废水零排放预处理工艺选择与实践[J]. 动力工程学报, 2019, 39(10): 840-846. ZHAGN Juan, LIU Pingyuan, JI Shunjian, et al. Selection and practice of pretreatment process for zero liquid discharge of desulfurization wastewater from coal-fired power plant[J]. Journal of Chinese Society of Power Engineering, 2019, 39(10): 840-846.

赵宁, 冯永新, 林廷坤, 等. 中高温对流环境下脱硫废水单液滴蒸发特性的实验研究[J]. 动力工程学报, 2022, 42(3): 255-262. ZHAO Ning, FENG Yongxin, LIN Tingkun, et al. Experimental study on convective evaporation characteristics of single desulfurization wastewater droplet at elevated temperature[J]. Journal of Chinese Society of Power Engineering, 2022, 42(3): 255-262.

陈武, 王凯亮, 罗天翔, 等. 脱硫废水旋转雾化及其干燥蒸发特性试验研究[J]. 中国电机工程学报, 2019, 39(11): 3295-3302. CHEN Wu, WANG Kailiang, LUO Tianxiang, et al. Study on rotating spray atomization and drying evaporation characteristics of desulfurization wastewater[J]. Proceedings of the CSEE, 2019, 39(11): 3295-3302.

白璐, 王凯亮, 罗天翔, 等. 脱硫废水在热烟气环境中的蒸发特性及其产物特性研究[J]. 热能动力工程, 2020, 35(5): 188-195. BAI Lu, WANG Kailiang, LUO Tianxiang, et al. Evaporation performance and product characteristics of desulfurization wastewater in hot flue gas environment[J]. Journal of Engineering for Thermal Energy and Power, 2020, 35(5): 188-195.

马双忱, 陈嘉宁, 万忠诚, 等. 高盐脱硫废水水泥化固定技术的研究现状与发展[J]. 化工进展, 2019, 38(9): 4275-4283. MA Shuangchen, CHEN Jianing, WAN Zhongcheng, et al. Research status and development on solidification for high-salt desulfurization wastewater with cement[J]. Chemical Industry and Engineering Progress, 2019, 38(9): 4275-4283.

XU Yin, JIN Baosheng, ZHOU Zheng, et al. Experimental and numerical investigations of desulfurization wastewater evaporation in a lab-scale flue gas duct: evaporation and HCl release characteristics[J]. Environmental Technology, 2021, 42(9): 1411-1427.

CUI Lin, SHEN Luguang, ZHANG Xiaoyang. Characteristics of HCl release and SO 2 /NO x absorption in desulfurization wastewater evaporation using hot flue gas[J ] . Energy & Fuels, 2020, 34(7): 8516-8525.

MA Shuangchen, CHAI Jin, WU Kai, et al. Experimental and mechanism research on volatilization characteristics of HCl in desulfurization wastewater evaporation process using high temperature flue gas[J]. Journal of Industrial and Engineering Chemistry, 2018, 66: 311-317.

ZHENG Chenghang, ZHENG Hao, YANG Zhengda, et al. Experimental study on the evaporation and chlorine migration of desulfurization wastewater in flue gas[J]. Environmental Science and Pollution Research, 2019, 26(5): 4791-4800.

倪声悦, 孙宗康, 叶华锋, 等. 脱硫废水液滴蒸发过程中氯迁移转化特性[J]. 动力工程学报, 2024, 44(12): 1941-1947. NI Shengyue, SUN Zongkang, YE Huafeng, et al. Migration and transformation characteristics of chlorine during desulfurization wastewater droplet evaporation[J]. Journal of Chinese Society of Power Engineering, 2024, 44(12): 1941-1947.

马双忱, 余伟静, 贾绍广, 等. 燃煤电厂脱硫废水处理技术研究与应用进展[J]. 化工进展, 2016, 35(1): 255-262. MA Shuangchen, YU Weijing, JIA Shaoguang, et al. Research and application progresses of flue gas desulfurization (FGD) wastewater treatment technologies in coal-fired plants[J]. Chemical Industry and Engineering Progress, 2016, 35(1): 255-262.

Views

291

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Migration and Transformation Characteristics of Mercury During Desulfurization Wastewater Evaporation

Modelling of Cascading Fault Evolution in Wind Power Integrated Systems Under Typhoon Conditions Based on Risk Inheritance and Dynamic Pruning

Design and Calculation of Rotary Spray Evaporation System for Desulfurization Wastewater

Emission and Risk Assessment of Organic Pollutants in the Co-combustion Process of Oil-based Cuttings in a Circulating Fluidized Bed

Research on Key Technologies of Medium and High Temperature Thermochemical Heat Storage

Related Author

ZHAGN Juan

CAO Zhaojun

SHI Haihong

LIU Deyu

SUN Hao

ZHAO Liang

ZHAO Yun

CHANG Jingyu

Related Institution

College of Marine and Environmental Sciences, Tianjin University of Science and Technology

College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology

Yancheng Thermoelectric Limited Liability Company

Shanghai Power Equipment Research Institute Co., Ltd.

Guangdong Electric Power Development Co., Ltd.

AI问答

⁰