面向物质资源化的燃煤电厂脱硫废水零排放工艺研究

徐敏; 杜洪宇; 郭家明; 赵晓丹; 卢卫; 孙超; 陈宇; 周振

doi:10.13205/j.hjgc.202210023

面向物质资源化的燃煤电厂脱硫废水零排放工艺研究

doi: 10.13205/j.hjgc.202210023

徐敏¹,
杜洪宇¹,
郭家明²,
赵晓丹^2, ,,
卢卫¹,
孙超¹,
陈宇¹,
周振²

1. 华能国际电力江苏能源开发有限公司南通电厂, 江苏南通 226003;
2. 上海电力大学环境与化学工程学院, 上海 201306

基金项目:

上海市教委曙光计划(19SG49)

华能南通电厂污泥、固废特性分析与污泥资源化关键技术研究(HNKJ19-G02)

国家自然科学基金项目(51878403)

详细信息

作者简介:
徐敏(1975-),男,本科,主要研究方向为电厂动力机械性能优化、环保优化、智能发电技术。xmxm2005@163.com

通讯作者:
赵晓丹(1979-),女,博士,副教授,主要研究方向为污水处理与电厂水处理。zhaoxiaodan@shiep.edu.cn

计量
- 文章访问数: 162
- HTML全文浏览量: 42
- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2021-08-06

A PILOT-SCALE EXPERIMENT FOR ZERO LIQUID DISCHARGE AND RESOURCE RECOVERY OF FLUE GAS DESULFURIZATION WASTEWATER IN COAL-FIRED POWER PLANTS

1. Nantong Power Plant, Huaneng International Power Jiangsu Energy Development Co., Ltd, Nantong 226003, China;
2. College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 201306, China

摘要

摘要: 基于水质特性分析,以物质资源化为核心,构建了脱硫废水强化递级分盐预处理-膜浓缩电解制氯零排放工艺,并进行了35 d的中试试验(500 L/d)。结果表明:该工艺能够在稳定运行的基础上实现污染物的高效去除和物质的充分资源化。预处理模块出水SS、Mg²⁺、SO^2-₄和Ca²⁺去除率分别为100%、96.6%、99.8%和98.9%;各处理单元沉淀物分别为CaSO₄、Mg(OH)₂、钙矾石和CaCO₃,其纯度可分别达到86.9%、99.8%、88.3%和99.9%,可作为脱硫石膏、除磷剂、阻燃剂和脱硫剂进行资源化利用;膜浓缩电解制氯模块所得次氯酸钠符合GB 19106-2013《次氯酸钠》中A型Ⅲ级要求,可用于消毒、杀菌与水处理。
- 脱硫废水 /
- 零排放 /
- 递级分盐 /
- 资源化 /
- 电解制氯
Abstract: Based on characteristics of wastewater and resource recovery, a zero liquid discharge process of flue gas desulfurization wastewater, combined with graded salt separation pretreatment, membrane concentration and electrolytic chlorine production unit, was constructed. A pilot-scale experiment was conducted for 35 d at a flow rate of 500 L/d. The results suggested that effective removal of pollutants and resource recovery could be achieved with suspended solid, Mg²⁺, SO^2-₄ and Ca²⁺ removal of 100%, 96.6%, 99.8% and 98.9%. The purity of CaSO₄, Mg(OH)₂, ettringite and CaCO₃ precipitate were 86.9%, 99.8%, 88.3% and 99.9%, which were suitable to be utilized as desulfurization gypsum, dephosphorization agent, flame retardant and desulfurizer. NaClO obtained from electrolytic chlorine production could satisfy the requirement of type A, class Ⅲ in China's National Standard GB 19106-2013, which was applicable to disinfection, sterilization and water treatment.
- desulfurization wastewater /
- zero discharge /
- graded salt separation /
- resource recovery /
- electrolytic chlorine production

HTML全文

参考文献(19)

[1]	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.
[2]	王涛英, 徐军锋, 胡彦云, 等. 燃煤火电厂高盐废水的处理[J]. 环境工程, 2020, 38(1):112-116 , 145.
[3]	蒋路漫, 周振, 田小测, 等. 电厂烟气脱硫废水零排放工艺中试研究[J]. 热力发电, 2019, 48(1):103-109.
[4]	YAN J, YUAN W H, LIU J, et al. An integrated process of chemical precipitation and sulfate reduction for treatment of flue gas desulphurization wastewater from coal-fired power plant[J]. Journal of Cleaner Production, 2019, 228:63-72.
[5]	刘海洋, 江澄宇, 谷小兵, 等. 燃煤电厂湿法脱硫废水零排放处理技术进展[J]. 环境工程, 2016, 34(4):33-36 , 41.
[6]	GUO J M, ZHOU Z, MING Q, et al. Recovering chemical sludge from the zero liquid discharge system of flue gas desulfurization wastewater as flame retardants by a stepwise precipitation process[J]. Journal of Hazard Material, 2021, 417:126054.
[7]	国家环境保护总局《水和废水监测分析方法》编委会. 水和废水监测分析方法[M]. 4版.中国环境科学出版社, 2002.
[8]	姚敏, 杨帅, 井云环, 等. 煤化工含盐废水分盐零排放工艺模拟研究[J]. 给水排水, 2019, 55(11):79-83.
[9]	李嘉懿, 张海涛, 周吉峙, 等. 脱硫废水减温烟气对飞灰中重金属稳定性的影响研究[J]. 环境科学与管理, 2020, 45(12):51-55.
[10]	赛世杰, 李买军, 党平, 等. 高分离纳滤系统在煤化工高盐废水零排放中的应用[J]. 环境工程, 2021, 39(7):173-178.
[11]	XIN Y, ZHOU Z, MING Q, et al. A two-stage desalination process for zero liquid discharge of flue gas desulfurization wastewater by chloride precipitation[J]. Journal of Hazard Material, 2020, 397:122744.
[12]	TIAN X C, ZHOU Z, XIN Y, et al. A novel sulfate removal process by ettringite precipitation with aluminum recovery:kinetics and a pilot-scale study[J]. Journal of Hazard Material, 2019, 365:572-580.
[13]	ZHENG Z P, TOKUNAGA T K, WAN J M. Influence of calcium carbonate on U(Ⅵ) sorption to soils[J]. Environmental Science & Technology, 2003, 37(24):5603-5608.
[14]	刘璐, 赵志娟, 李雅, 等. 工业废水电渗析过程中膜污染研究进展[J].过程工程学报, 2015, 15(5):881-891.
[15]	施小林, 王大新, 楼书怿, 等. 电渗析技术在水泥厂废水零排放处理中的应用[J]. 环境工程, 2021, 39(7):179-184.
[16]	马玉斐, 王勇. 电解制氯系统酸洗废液的资源化处理工艺[J]. 给水排水, 2019, 55(9):65-69.
[17]	中华人民共和国建设部. 次氯酸钠发生器:GB 12176-1990[S]. 1990.
[18]	苗春葆, 齐振宇. 影响工业生产次氯酸钠有效氯含量的因素[J]. 中国氯碱, 2021, 4(2):24-26.
[19]	吴火强, 刘亚鹏, 王璟, 等. 脱硫废水膜浓缩浓水电解制氯工艺分析[J]. 热力发电, 2016, 45(9):109-115 , 121.