脱硫废水烟道蒸发工艺对烟气酸露点影响分析

doi:10.11930/j.issn.1004-9649.201803207

中国电力 ›› 2019, Vol. 52 ›› Issue (1): 151-155,184.DOI: 10.11930/j.issn.1004-9649.201803207

脱硫废水烟道蒸发工艺对烟气酸露点影响分析

吴智泉, 曹蕃, 袁园, 贾西部

中国大唐集团科学技术研究院有限公司, 北京 100043

收稿日期:2018-04-02 修回日期:2018-06-16 出版日期:2019-01-05 发布日期:2019-01-14
作者简介:吴智泉(1974-),男,博士,高级工程师,从事燃煤电厂污染物减排及新能源领域的研究,E-mail:wuzhiquan@cdt-kxjs.com;曹蕃(1988-),男,博士,从事燃煤电厂污染物减排及废水处理等方面的研究,E-mail:caofan@cdt-kxjs.com

Analysis on the Influence of the Wastewater Evaporation in Flue Duct to the Flue Gas Dew Point

WU Zhiquan, CAO Fan, YUAN Yuan, JIA Xibu

China Datang Corporation Science and Technological Research Institute, Beijing 100043, China

Received:2018-04-02 Revised:2018-06-16 Online:2019-01-05 Published:2019-01-14

摘要/Abstract

摘要： 为研究脱硫废水烟道蒸发工艺对烟气酸露点的影响，在某600 MW机组上进行烟道蒸发中间试验（中试），实测废水蒸发前后烟气中H₂O和SO₃浓度，并采用不同计算公式计算酸露点。中试结果表明：在空气预热器后1/4烟道中（烟气量为4×10⁵~5×10⁵ m³/h）喷入900~1 400 L/h的废水时，烟气中的水蒸气质量分数增加了0.7~0.9个百分点，而烟气中的SO₃浓度却降低30%~50%，说明废水烟道蒸发促进了SO₃向硫酸雾的转化并促进了其在飞灰颗粒上的吸附；废水喷入烟道蒸发后，烟气酸露点反而有所降低，虽然烟气平均温度降低了9~14 ℃，但废水喷入后的烟温仍基本高于废水喷入后的酸露点，因而脱硫废水烟道蒸发不会造成下游烟道和设备的低温腐蚀。

关键词: 燃煤机组, 脱硫废水, 烟道蒸发, 酸露点, SO₃

Abstract: The effect of the wastewater evaporation in flue duct to the flue gas dew point was studied in this article. Pilot test of the wastewater evaporation was conducted on a 600 MW unit. The H₂O and SO₃ contents in the flue gas were detected and the dew point was calculated using different formulas. The results showed that, when 900~1 400 L/h wastewater was injected in 1/4 flue duct of the 600 MW unit (the amount of flue gas was 4×10⁵~5×10⁵ m³/h), the water vapor in the flue gas increased 0.7%~0.9%, whereas the SO₃ decreased by 30%~50%, which indicated that the transformation from SO₃ to sulfuric acid mist and their adsorption on fly ash particles were improved after the wastewater evaporation. The flue gas dew point decreased by 9~14 ℃ after the evaporation, and the flue gas temperature could be higher than the dew point. Thus, wastewater evaporation in flue duct could not lead to low-temperature corrosion of the downstream ducts and equipments under the condition of pilot test.

Key words: coal-fired unit, desulfurization wastewater, flue duct evaporation, acid dew point, SO₃

中图分类号:

X773
TM621.9

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.

WU Zhiquan, CAO Fan, YUAN Yuan, JIA Xibu. Analysis on the Influence of the Wastewater Evaporation in Flue Duct to the Flue Gas Dew Point[J]. Electric Power, 2019, 52(1): 151-155,184.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201803207

https://www.electricpower.com.cn/CN/Y2019/V52/I1/151

参考文献 21

[1]	胡石, 丁绍峰, 樊兆世. 燃煤电厂脱硫废水零排放工艺研究[J]. 洁净煤技术, 2015, 21(2):129-133 HU Shi, DING Shaofeng, FAN Zhaoshi. Zero release technology of desulfurization waste water in coal-fired power plant[J]. Clean Coal Technology, 2015, 21(2):129-133
[2]	刘秋生. 烟气脱硫废水"零排放"技术应用[J]. 热力发电, 2014, 43(12):114-117 LIU Qiusheng. Application and comparison of zero discharge technology for desulfurization waste water[J]. Thermal Power Generation, 2014, 43(12):114-117
[3]	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
[4]	MA Shuangchen, CHAI Jin, CHEN Gongda, et al. Research on desulfurization wastewater evaporation:Present and future perspectives[J]. Renewable and Sustainable Energy Reviews, 2016, 58(1):1143-1151.
[5]	潘娟琴, 李建华, 胡将军. 火力发电厂烟气脱硫废水处理[J]. 工业水处理, 2005, 25(9):5-7 PAN Juanqin, LI Jianhua, HU Jiangjun. Power plant wastewater treatment by FGD[J]. Industrial Water Treatment, 2005, 25(9):5-7
[6]	吴怡卫. 石灰石-石膏湿法烟气脱硫废水处理的研究[J]. 中国电力, 2006, 39(4):75-78 WU Yiwei. Study on the wastewater treatment in limestone-gypsum wet FGD process[J]. Electric Power, 2006, 39(4):75-78
[7]	李明波, 范玺, 孙克勤. 利用烟道气处理火电厂WFGD废水的技术应用[J]. 电力科技与环保, 2010, 26(2):53-55 LI Mingbo, FAN Xi, SUN Keqin. Technique application on WFGD wastewater treatment using flue gas in power plants[J]. Electric Power Technology and Environmental Protection, 2010, 26(2):53-55
[8]	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(S2):297-301 MA Shuangchen, CHAI Feng, WU Wenlong, et al. Experimental researchon influencing factors of flue evaporation treatment for desulfurization wastewater[J]. Environmental Science&Technology, 2015, 38(S2):297-301
[9]	张志荣. 火电厂湿法烟气脱硫废水喷雾蒸发处理方法关键问题研究[D]. 重庆:重庆大学, 2011.
[10]	游晓宏, 吴怡卫, 韩倩倩, 等. 脱硫废水烟道气蒸发技术电厂应用示范工程[C]//北京国际环境技术研讨会, 北京, 2013.
[11]	OKKES A. Get acid dew point of flue gas[J]. Hydrocarbon Processing, 1987, 66(7):53-55.
[12]	VERHOFF F H, BANCHERO J T. Predicting dew points of flue gases[J]. Chemical Engineering Progress, 1974, 70(8):71-72.
[13]	李鹏飞, 佟会玲. 烟气酸露点计算方法比较和分析[J]. 锅炉技术, 2009, 40(6):5-8 LI Pengfei, TONG Huiling. Comparison and analysis on the calculation methods of acid dew point of flue gas[J]. Boiler Technology, 2009, 40(6):5-8
[14]	WEISE C, GÜSEWELL M, HEINZE G, et al. Industrial investigations for the estimation of flue gas dew points[J]. VGB Power Tech, 2000, 80(8):43-47.
[15]	LISLE E S, SENSENBAUGH J D. The determination of sulfur trioxide and acid dew point in flue gases[J]. Combustion, 1965, 36(1):12-16.
[16]	齐立强, 原永涛, 史亚微. 燃煤烟气中的SO3对微细颗粒物电除尘特性的影响[J]. 动力工程学报, 2011, 31(7):539-543 QI Liqiang, YUAN Yongtao, SHI Yawei. Influence of SO3 on electrostatic precipitation of fine particles in flue gas[J]. Journal of Chinese Society of Power Engineering, 2011, 31(7):539-543
[17]	张建中. 燃煤烟气降温除尘过程中SO3浓度的浓淡分离现象及对酸露点温度影响的分析[J]. 锅炉技术, 2015, 46(3):12-18 ZHANG Jianzhong. Dense-dilute separation phenomenon of SO3 concentration during the coal-fired flue gas cooling and dedusting process and analysis on the influence of acid dew point temperature[J]. Boiler technology, 2015, 46(3):12-18
[18]	胡斌, 刘勇, 任飞, 等. 低低温电除尘协同脱除细颗粒与SO3实验研究[J]. 中国电机工程学报, 2016, 36(16):4319-4325 HU Bin, LIU Yong, REN Fei, et al. Experimental study on simultaneous control of fine particle and SO3 by low-low temperature electrostatic precipitator[J]. Proceedings of the CSEE, 2016, 36(16):4319-4325
[19]	胡斌, 刘勇, 杨春敏, 等. 化学团聚促进电除尘脱除烟气中PM2.5和SO3[J]. 化工学报, 2016, 67(9):3902-3909 HU Bin, LIU Yong, YANG Chunmin, et al. Simultaneous control of PM2.5 and SO3 by chemical agglomeration collaborative electrostatic precipitation[J]. CIESC Journal, 2016, 67(9):3902-3909
[20]	BRACHERT L, KOCHENBURGER T, SCHABER K. Facing the sulfuric acid aerosol problem in flue gas cleaning:Pilot plant experiments and simulation[J]. Aerosol Science and Technology, 2013, 47(10):1083-1091.
[21]	史文峥, 杨萌萌, 张绪辉, 等. 燃煤电厂超低排放技术路线与协同脱除[J]. 中国电机工程学报, 2016, 36(16):4308-4318 SHI Wenzheng, YANG Mengmeng, ZHANG Xuhui, et al. Ultra-low emission technical route of coal-fired power plants and the cooperative removal[J]. Proceedings of the CSEE, 2016, 36(16):4308-4318

脱硫废水烟道蒸发工艺对烟气酸露点影响分析

Analysis on the Influence of the Wastewater Evaporation in Flue Duct to the Flue Gas Dew Point

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献 21

相关文章 15

编辑推荐

Metrics

[1]	刘东旭, 张潇元, 马青, 冯前伟, 杜振. 燃煤机组SO₃生成与控制技术路线分析[J]. 中国电力, 2024, 57(6): 235-242.
[2]	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.
[3]	刘毅. 燃煤电厂烟气中SO₃排放控制中试研究[J]. 中国电力, 2022, 55(7): 201-208.
[4]	张国柱, 张钧泰, 文钰, 杨凯旋, 刘明, 刘继平. 燃煤机组烟气余热及水回收系统变工况特性和调控策略[J]. 中国电力, 2022, 55(4): 214-220.
[5]	刘志坦, 姚杰, 庄柯, 喻乐蒙, 周凯. 燃气轮机与燃煤机组SCR脱硝催化剂特性比较[J]. 中国电力, 2021, 54(6): 145-152.
[6]	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.
[7]	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.
[8]	张志强, 朱法华, 邹斯诣, 史鹏飞, 王晓玲, 游秦, 姚力, 闫绍帅, 王兴. 基于实测的烟气“消白”工程环境效益研究[J]. 中国电力, 2020, 53(9): 202-207.
[9]	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.
[10]	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.
[11]	吴家玉, 朱杰, 莫华, 张峰, 帅伟, 张晴, 那钦. 典型燃煤电厂浆液冷却烟气消白设施SO₃治理效果测试研究[J]. 中国电力, 2020, 53(8): 145-150,172.
[12]	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.
[13]	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.
[14]	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.
[15]	张顺, 闫培飞, 姚洪宇, 李生鹏, 曹士保, 高亚洲. 亚临界汽包炉深度调峰安全性评估及控制优化技术[J]. 中国电力, 2020, 53(7): 203-210.

模态框（Modal）标题

脱硫废水烟道蒸发工艺对烟气酸露点影响分析

Analysis on the Influence of the Wastewater Evaporation in Flue Duct to the Flue Gas Dew Point

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献 21

相关文章 15

编辑推荐

Metrics