脱硫废水烟道蒸发工艺协同脱汞效率研究

doi:10.11930/j.issn.1004-9649.201711270

中国电力 ›› 2018, Vol. 51 ›› Issue (10): 139-144.DOI: 10.11930/j.issn.1004-9649.201711270

脱硫废水烟道蒸发工艺协同脱汞效率研究

陈坤洋¹, 郭婷婷¹, 贾西部², 曹蕃¹, 袁园²

1. 中国大唐集团科学技术研究院有限公司火力发电技术研究院, 北京 100040;
2. 大唐西北电力试验研究院, 陕西西安 710021

收稿日期:2017-12-14 修回日期:2018-02-22 出版日期:2018-10-05 发布日期:2018-10-12
作者简介:陈坤洋(1985-),女,博士,从事燃煤电厂烟气多污染物协同脱除技术研究,E-mail:chenkunyang@cdt-kxjs.com
基金资助:
中国大唐集团公司重大科技资助项目（CDT1-17-02）。

Enhanced Mercury Removal Technology in Coal-Fired Power Plants Through Desulfurization Wastewater Evaporation

CHEN Kunyang¹, GUO Tingting¹, JIA Xibu², CAO Fan¹, YUAN Yuan²

1. Institute of Thermal Power Technology, China Datang Corporation Science and Technology Research Institute, Beijing 100040, China;
2. Datang Northwest Electric Power Test & Research Institute, Xi'an 710021, China

Received:2017-12-14 Revised:2018-02-22 Online:2018-10-05 Published:2018-10-12
Supported by:
This work is supported by Major Science and Technology Project of China Datang Corporation (No.CDT1-17-02).

摘要/Abstract

摘要： 燃煤电厂脱硫废水成分复杂，处理难度大。以某燃煤电厂600 MW机组为研究对象，进行了脱硫废水（人工配制）烟道蒸发试验，探索了协同脱汞的可行性，并讨论了脱硫废水氯离子质量浓度与机组运行负荷等对脱汞效率的影响。研究结果表明，将脱硫废水喷射至烟道进行雾化干燥的协同工艺，不仅有效提高了烟气中HCl含量，而且能促使更多Hg⁰转化为较易被飞灰吸附的Hg²⁺，可实现脱硫废水零排放和烟气汞的减排；废水中的氯离子对脱汞效率有较大的影响，当废水中氯离子质量浓度由21 250 mg/L增加至36 500 mg/L时，烟气中气态汞的协同脱除效率由95%降至58%；与机组低负荷运行时协同脱汞效率相比，高负荷条件下协同脱汞效率有所降低。

关键词: 燃煤机组, 汞, 脱硫废水, 烟道蒸发, 氯离子, HCl

Abstract: It is difficult to treat Wet Flue Gas Desulfurization (WFGD) wastewater of coal-fired power plant due to its complex compositions. In this paper, take a 600 MW supercritical unit as the research object, desulfurization wastewater evaporation technology is used to enhance the removal of gaseous mercury (Hg) for coal-fired power plants and the feasibility of synergistic mercury removal is explored. Effects of desulfurization wastewater chlorine ion concentration and unit load on Hg removal were studied as well. The results show that WFGD wastewater evaporation is beneficial to improve the efficiency of Hg oxidation and removal because Hg enriched with chlorine ions is easier to be removed. Hence this method realizes WFGD wastewater zero discharge and simultaneously enhances Hg removal efficiency. In addition, the mercury removal efficiency is greatly affected by chlorine ion concentration in desulfurization wastewater. When the chlorine ion concentration was increased from 21 250 mg/L to 36 500 mg/L, the mercury removal efficiency dropped from 95% to 58%. The synergistic mercury removal performance is slightly lower compared with the high loading conditions.

Key words: coal-fired unit, mercury, desulfurization wastewater, duct evaporation, chlorine ions, HCl

中图分类号:

X701.3
TM628

陈坤洋, 郭婷婷, 贾西部, 曹蕃, 袁园. 脱硫废水烟道蒸发工艺协同脱汞效率研究[J]. 中国电力, 2018, 51(10): 139-144.

CHEN Kunyang, GUO Tingting, JIA Xibu, CAO Fan, YUAN Yuan. Enhanced Mercury Removal Technology in Coal-Fired Power Plants Through Desulfurization Wastewater Evaporation[J]. Electric Power, 2018, 51(10): 139-144.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201711270

https://www.electricpower.com.cn/CN/Y2018/V51/I10/139

参考文献

[1] 刘玉坤, 禚玉群, 陈昌和, 等. 燃煤电站脱硫系统的脱汞性能[J]. 中国电力, 2011, 44(12):68-72 LIU Yukun, ZHUO Yuqun, CHEN Changhe, et al. Mercury removal performance of desulfurization systems in coal-fired power plants[J]. Electric Power, 2011, 44(12):68-72
[2] 张静怡. 燃煤电站烟气中汞脱除与减排技术[J]. 中国电力, 2012, 45(9):76-79 ZHANG Jingyi. Technology of mercury removal and reduction for flue gas of coal-fired power plants[J]. Electric Power, 2012, 45(9):76-79
[3] SENIOR C L, SAROFIM A F, ZENG T, et al. Gas-phase transformations of mercury in coal-fired power plants[J]. Fuel Processing Technology, 2000, 63(2):197-213.
[4] 喻敏, 董勇, 王鹏, 等. 氯元素对燃煤烟气脱汞的影响研究进展[J]. 化工进展, 2012, 31(7):1610-1614 YU Min, DONG Yong, WANG Peng, et al. Progress of effects of chloride on mercury removal for coal-fired flue gas[J]. Chemical Industry and Engineering Progress, 2012, 31(7):1610-1614
[5] 吴江, 潘卫国, 任建兴, 等. 烟气汞形态分布及其受氯化物添加剂影响的研究[J]. 动力工程, 2009, 29(4):405-408 WU Jiang, PAN Weiguo, REN Jianxing, et al. Mercury speciation distribution in flue gas and the influence of chloride additive on it[J]. Journal of Power Engineering, 2009, 29(4):405-408
[6] 张梦泽. 氯化钙添加促进燃煤烟气汞形态转化的试验研究[D]. 济南:山东大学, 2014.
[7] 睢辉. 氯化镁调质烟气促进汞催化氧化的试验与机理研究[D]. 济南:山东大学, 2015.
[8] 马双忱, 于伟静, 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
[9] 张志国, 胡大龙, 王璟, 等. 燃气电厂深度节水及废水零排放方案[J]. 中国电力, 2017, 50(7):127-132 ZHANG Zhiguo, HU Dalong, WANG Jing, et al. The in-depth water conservation and zero discharge technology for gas turbine power plants[J]. Electric Power, 2017, 50(7):127-132
[10] 郭东明. 脱硫工程技术与设备[M]. 北京:化学工业出版社, 2007.
[11] USEPA. Steam electric power generating point source category:final detailed study report, EPA 821-R-09-08[R]. 2009.
[12] WANG J, WANG T, MALLHI H, et al. The role of ammonia on mercury leaching from coal fly ash[J]. Chemosphere, 2007, 69(10):1586-1592.
[13] 孟素丽, 段钰锋, 黄治军, 等. 燃煤飞灰的物化性质及其吸附汞影响因素的试验研究[J]. 热力发电, 2009, 38(8):46-51 MENG Suli, DUAN Yufeng, HUANG Zhijun, et al. Experimental study on physicochemical characteristics and influencing factors of mercury adsorption by fly ash from coal combustion[J]. Thermal Power Generation, 2009, 38(8):46-51
[14] 高洪亮, 王向宇, 周劲松, 等. 静电除尘器对燃煤电站汞排放的影响[J]. 锅炉技术, 2007, 38(5):63-67 GAO Hongliang, WANG Xiangyu, ZHOU Jinsong, et al. The influence of ESP on mercury emission from coal-fired power plant[J]. Boiler Technology, 2007, 38(5):63-67
[15] WIDMER N C, COLE J A, SEEKER W R, et al. Practical limitation of mercury speciation in simulated municipal waste incinerator flue gas[J]. Combustion Science & Technology, 1998, 134(1-6):315-326.
[16] 赵永椿, 张军营, 刘晶, 等. 燃煤飞灰氧化汞的机制研究[J]. 科学通报, 2009(21):3395-3399 ZHAO Yongchun, ZHANG Junying, LIU Jing, et al. Mechanism of Hg oxidation by fly ash from coal combustion[J]. Chinese Science Bulletin, 2009(21):3395-3399
[17] 罗光前, 姚洪, 徐明厚, 等. 均相系统中汞的氧化实验与热力学平衡计算[J]. 工程热物理学报, 2007, 28(6):1039-1042 LUO Guangqian, YAO Hong, XU Minghou, et al. Experiments and thermodynamic equilibrium of homogenous oxidation of mercury[J]. Journal of Engineering Thermophysics, 2007, 28(6):1039-1042
[18] 杨应举, 屈文麒, 刘晶, 等. 燃煤烟气中Hg/Cl均相与非均相氧化机理[J]. 燃烧科学与技术, 2017, 23(1):10-14 YANG Yingju, QU Wenqi, LIU Jing, et al. Mechanism of homogeneous and heterogeneous Hg/Cl oxidation in coal-fired flue gas[J]. Journal of Combustion Science and Technology, 2017, 23(1):10-14
[19] 杨建平, 赵永椿, 张军营, 等. 燃煤电站飞灰对汞的氧化和捕获的研究进展[J]. 动力工程学报, 2014, 34(5):337-345 YANG Jianping, ZHAO Yongchun, ZHANG Junying, et al. Research process on mercury oxidation and capture with fly ash of coal-fired power plant[J]. Journal of Chinese Society of Power Engineering, 2014, 34(5):337-345
[20] 高洪亮, 周劲松, 骆仲泱, 等. 燃煤烟气中汞氧化的动力学机理[J]. 动力工程, 2007, 27(6):975-979 GAO Hongliang, ZHOU Jinsong, LUO Zhongyang, et al. The kinetic mechanism of mercury oxidation in coal combustion flue gas[J]. Journal of Power Engineering, 2007, 27(6):975-979
[21] 徐玮. 燃煤烟气中汞的形态分布特征及净化设备的除汞效果[D].上海:上海交通大学, 2010.

脱硫废水烟道蒸发工艺协同脱汞效率研究

Enhanced Mercury Removal Technology in Coal-Fired Power Plants Through Desulfurization Wastewater Evaporation

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脱硫废水烟道蒸发工艺协同脱汞效率研究

Enhanced Mercury Removal Technology in Coal-Fired Power Plants Through Desulfurization Wastewater Evaporation

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