脱硫废水旋转喷雾蒸发特性实验研究

doi:10.11930/j.issn.1004-9649.202005143

中国电力 ›› 2021, Vol. 54 ›› Issue (1): 188-195.DOI: 10.11930/j.issn.1004-9649.202005143

脱硫废水旋转喷雾蒸发特性实验研究

李飞¹, 陈海杰¹, 刘峰均², 谷小兵¹, 车广民², 白玉勇¹, 杨林军²

1. 大唐环境产业集团股份有限公司，北京 100097;
2. 能源热转换及其过程测控教育部重点实验室（东南大学），江苏南京 210096

收稿日期:2020-05-18 修回日期:2020-07-25 出版日期:2021-01-05 发布日期:2021-01-11
作者简介:李飞(1984—)，男，高级工程师，从事水污染控制技术研发工作，E-mail：raining_shadow@163.com;陈海杰(1970—)，女，高级工程师，从事火电节能环保技术研发工作，E-mail：chenhj@dteg.com.cn;杨林军(1967—)，男，通信作者，教授，博士生导师，从事电厂脱硫废水零排放研究，E-mail：ylj@seu.edu.cn

Experimental Study on the Characteristics of Rotating Spray Evaporation of Desulfurization Wastewater

LI Fei¹, CHEN Haijie¹, LIU Fengjun², GU Xiaobing¹, CHE Guangmin², BAI Yuyong¹, YANG Linjun²

1. Datang Environment Industry Group Co., Ltd., Beijing 100097, China;
2. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education (Southeast University), Nanjing 210096, China

Received:2020-05-18 Revised:2020-07-25 Online:2021-01-05 Published:2021-01-11

摘要/Abstract

摘要： 脱硫废水旋转喷雾干燥技术是一种利用热烟气蒸发脱硫废水的零排放技术。开展了不同悬浮物（SS）含量的脱硫废水原水以及经浓缩的高盐废水的蒸发实验，采用可视化手段观察了脱硫废水在干燥塔内的蒸发特性，考察了脱硫废水喷雾蒸发过程中停留时间、进口烟气温度、气液比对蒸发特性的影响。结果表明，旋转喷雾蒸发工艺对高盐、高SS含量等复杂脱硫废水组分具有较佳的适应性；脱硫废水从旋转雾化器喷出后迅速蒸发，主蒸发区在雾化盘下方0.75~1.00 m区域内；随后是蒸发析出的未干盐分及未完全蒸发的废水液滴进一步蒸干至含水率低于2 %；烟气在喷雾干燥塔内的停留时间需要维持在20 s以上才能保证塔出口灰分含水率低于2 %；入口烟气温度越高，其塔底及塔出口的灰分含水率越低，在气液比为12 000 m³/m³（标准状态）的废水工况下，入口烟温为280 ℃时已经难以保证废水液滴良好蒸发；在入口烟气温度为340 ℃、气液比大于10 000 m³/m³（标准状态）时，塔底灰分含水率小于2%，蒸发效果良好。

关键词: 脱硫废水, 蒸发特性, 停留时间, 悬浮物浓度, 可视化实验

Abstract: As a type of zero-discharge technologies, the rotary spray drying technology utilizes hot flue gas to evaporate desulfurization wastewater. In this paper, the evaporation test is carried out for both the raw wastewater with different suspended solid (SS) content and the concentrated high salinity wastewater. Specifically, the evaporation characteristics of the desulfurization wastewater in the drying tower are examined with the aid of visualization techniques. Moreover, the impacts of residence time duration, inlet flue gas temperature and gas-liquid ratio on the evaporation characteristics are also investigated during the spray evaporation process of the desulfurization wastewater. The results show that the rotary spray evaporation process has better adaptability to complex desulphurization wastewater components such as high salinity and high SS content. After sprayed from the rotary atomizer, the desulfurization wastewater evaporates rapidly mainly into the zone of 0.75~1.00 m below the atomization tray, and then the precipitated salt and the incompletely evaporated wastewater droplets are further evaporated until the moisture content is less than 2%. The residence time of the flue gas needs to last at least 20 seconds in the spray drying tower so as to ensure the moisture content of ash particles to be less than 2% at the outlet of the tower. The higher the temperature of the inlet flue gas, the lower the particle moisture content at both the bottom and the outlet of the tower. As for the wastewater with the gas-liquid ratio at 12 000 m³/m³ (standard state), the expected outcome of evaporation of wastewater droplets could hardly be guaranteed with the inlet smoke temperature at 280 ℃. However, if the inlet flue gas temperature is maintained at 340 ℃ and the gas-liquid ratio is greater than 10 000 m³/m³(standard state), the bottom ash moisture content is dropped down below 2%, which shows good evaporation effect.

Key words: desulfurization wastewater, evaporation characteristics, residence time, suspended solid concentration, visualization experiment

李飞, 陈海杰, 刘峰均, 谷小兵, 车广民, 白玉勇, 杨林军. 脱硫废水旋转喷雾蒸发特性实验研究[J]. 中国电力, 2021, 54(1): 188-195.

LI Fei, CHEN Haijie, LIU Fengjun, GU Xiaobing, CHE Guangmin, BAI Yuyong, YANG Linjun. Experimental Study on the Characteristics of Rotating Spray Evaporation of Desulfurization Wastewater[J]. Electric Power, 2021, 54(1): 188-195.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202005143

https://www.electricpower.com.cn/CN/Y2021/V54/I1/188

参考文献

[1] 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, 2834
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, 2834
[2] 叶春松, 操容, 梁巍, 等. 脱硫废水高温烟气蒸发过程中氯盐和铵盐的分解[J]. 发电技术, 2019, 40(4): 362-366
YE Chunsong, CAO Rong, LIANG Wei, et al. Decomposition of chloride and ammoniate in the evaporation process of desulfurization wastewater with high temperature flue gas[J]. Power Generation Technology, 2019, 40(4): 362-366
[3] 马双忱, 柴峰, 吴文龙, 等. 脱硫废水烟道蒸发工艺影响因素实验研究[J]. 环境科学与技术, 2015, 38(增刊2): 297-301, 306
MA Shuangchen, CHAI Feng, WU Wenlong, et al. Experimental research on influencing factors of flue evaporation treatment for desulfurization wastewater[J]. Environmental Science & Technology, 2015, 38(S2): 297-301, 306
[4] 沈鲁光. 脱硫废水调质蒸发协同烟气污染物脱除研究[D]. 济南: 山东大学, 2018.
SHEN Luguang. Study on the desulfurization wastewater evaporation and the synergetic removal of the flue gas pollutants through adjusting the desulfurization water pH value[D]. Jinan: Shandong University, 2018.
[5] 马双忱, 柴晋, 贾绍广, 等. 废水水质调节对金属腐蚀及高温氯挥发的影响[J]. 动力工程学报, 2018, 38(3): 231-236
MA Shuangchen, CHAI Jin, JIA Shaoguang, et al. Effects of FGD waste water conditioning on metal corrosion and high-temperature chlorine valorization[J]. Journal of Chinese Society of Power Engineering, 2018, 38(3): 231-236
[6] 赵舒然, 韩小渠, 张丹, 等. 燃煤电厂脱硫废水热法零排放技术成本分析[J]. 中国电力, 2020, 53(7): 184-188, 196
ZHAO Shuran, HAN Xiaoqu, ZHANG Dan, et al. Thermal cost analysis on thermal zero discharge technology for flue gas desulfurization (FGD) wastewater of coal-fired units[J]. Electric Power, 2020, 53(7): 184-188, 196
[7] 柴晋, 武凯, 温佳琪, 等. 脱硫废水高温烟气蒸发实验研究[C]//2017中国环境科学学会科学与技术年会论文集(第二卷). 厦门, 2017: 1070-1081.
[8] 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): 3295-3303
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): 3295-3303
[9] ENOCH G D, SPIERNING W, TIGCHELAAR P, et al. Treatment of waste water from wet lime (stone) flue gas desulfurization plants with aid of crossflow microfiltration[J]. Separation Science and Technology, 1990, 25(13/14/15): 1587-1605.
[10] 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
[11] 中华人民共和国生态环境保护部. 国务院关于印发水污染防治计划的通知[EB/OL]. (2015-04-16)[2019-04-02]. http://zfs.mep.gov.cn/fg/gwyw/201504/t20150416_299146.shtml.
[12] 王乃华. 新型半干法烟气脱硫的实验及机理研究[D]. 杭州: 浙江大学, 2001.
WANG Naihua. Experimental and theoretical study on a new semi-dry flue gas desulfurization[D]. Hangzhou: Zhejiang University, 2001.
[13] GETLER J L, SHELTON H L, FURLONG D A. Modeling the spray absorption process for SO₂ removal[J]. Journal of the Air Pollution Control Association, 1979, 29(12): 1270-1274.
[14] HILL F F, ZANK J. Flue gas desulphurization by spray dry absorption[J]. Chemical Engineering and Processing: Process Intensification, 2000, 39(1): 45-52.
[15] 滕斌. 半干法烟气脱硫的实验及机理研究[D]. 杭州: 浙江大学, 2004.
TENG Bin. Experimental and theoretical study on semi-dry flue gas desulfurization[D]. Hangzhou: Zhejiang University, 2004.
[16] 胡海涛. 低温烟气蒸发脱硫废水特性研究[D]. 济南: 山东大学, 2018.
HU Haitao. Study on evaporation characteristics of desulphurization wastewater with low-temperature flue gas[D]. Jinan: Shandong University, 2018.
[17] 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

脱硫废水旋转喷雾蒸发特性实验研究

Experimental Study on the Characteristics of Rotating Spray Evaporation of Desulfurization Wastewater

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

[1]	赵宁, 冯永新, 林廷坤, 杨青山, 谢志文. 脱硫废水旋转喷雾蒸发与旁路烟道蒸发特性研究[J]. 中国电力, 2022, 55(7): 193-200.
[2]	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.
[3]	杨阳, 胡大龙, 黄倩, 许臻, 王璟, 吴火强, 王博. 火电厂废水排放控制政策法规与技术路线综述[J]. 中国电力, 2020, 53(8): 131-138.
[4]	贾西部. 石灰石-石膏湿法脱硫废水排放量深度解析[J]. 中国电力, 2020, 53(8): 139-144,163.
[5]	王晋权, 赵周明, 张志华. 低温余热闪蒸脱硫废水处理系统设计及应用[J]. 中国电力, 2020, 53(8): 151-157,181.
[6]	赵舒然, 韩小渠, 张丹, 刘继平. 燃煤电厂脱硫废水热法零排放技术热成本分析[J]. 中国电力, 2020, 53(7): 184-188,196.
[7]	张千, 倪黎, 豆朝宗, 肖海平. 脱硫废水处理前后喷射Cl析出特性[J]. 中国电力, 2020, 53(7): 197-202.
[8]	王文欣, 高毅, 刘春红, 童小忠, 陈彪, 祁志福, 张勤. 燃煤电厂旁路烟气干燥塔控制技术开发[J]. 中国电力, 2020, 53(1): 147-154.
[9]	晋银佳, 刘泽宇, 尤良洲, 夏守庆, 唐国瑞. RESALT技术在燃煤电厂脱硫废水浓缩处理中的应用[J]. 中国电力, 2019, 52(7): 154-160.
[10]	吴智泉, 曹蕃, 袁园, 贾西部. 脱硫废水烟道蒸发工艺对烟气酸露点影响分析[J]. 中国电力, 2019, 52(1): 151-155,184.
[11]	朱懿灏, 赵晓丹, 田小测, 吴军辉, 窦微笑, 周振. 脱硫废水处理系统污泥资源化除磷技术研究[J]. 中国电力, 2019, 52(1): 137-143.
[12]	佘晓利, 潘卫国, 王程瑶, 倪迎春, 秦岭. 脱硫废水旁路塔雾化蒸发数值模拟[J]. 中国电力, 2019, 52(1): 129-136.
[13]	连坤宙, 胡特立, 王永前, 焦绪常, 王璟, 曹红梅, 毛进, 樊开远. 燃煤电厂脱硫废水预处理装置设计与中试研究[J]. 中国电力, 2018, 51(6): 166-171.
[14]	翁卫国, 孙建国, 李钦武, 周灿, 蒋善行. 脱硫废水零排放系统关键参数数值模拟研究[J]. 中国电力, 2018, 51(6): 42-47.
[15]	聂向欣, 郑宗明, 崔孝洋, 陆强, 董长青, 赵锦. 燃煤电厂湿法烟气脱硫废水处理技术研究进展[J]. 中国电力, 2018, 51(12): 175-179.

模态框（Modal）标题

脱硫废水旋转喷雾蒸发特性实验研究

Experimental Study on the Characteristics of Rotating Spray Evaporation of Desulfurization Wastewater

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics