脱硫废水旁路塔雾化蒸发数值模拟

doi:10.11930/j.issn.1004-9649.201805195

中国电力 ›› 2019, Vol. 52 ›› Issue (1): 129-136.DOI: 10.11930/j.issn.1004-9649.201805195

脱硫废水旁路塔雾化蒸发数值模拟

佘晓利^1,2, 潘卫国^1,2, 王程瑶¹, 倪迎春^1,3, 秦岭^1,2

1. 上海电力学院, 上海 200090;
2. 上海发电环保工程技术研究中心, 上海 200090;
3. 江苏利港电力有限公司, 江苏无锡 214444

收稿日期:2018-05-30 修回日期:2018-07-27 出版日期:2019-01-05 发布日期:2019-01-14
作者简介:佘晓利(1993-),男,硕士研究生,从事电站性能、废水零排放研究,E-mail:shexl0310@163.com;潘卫国(1967-),男,通信作者,博士,教授,从事燃烧与污染物控制、热力设备优化与节能技术等方面研究,E-mail:pweiguo@163.com
基金资助:
国家重点研发计划资助项目（高灰煤超低排放技术与装备集成应用，2016YFC0203704）；国家重点研发计划资助项目（超低NO_x炉内燃烧控制技术（子课题），2018YFB0604204-06）；上海市科委科研计划资助项目（燃煤烟气超低排放湿法脱硫协同脱硝技术研究，18DZ1202502）。

Numerical Simulation of Evaporative Evaporation of Desulfurization Wastewater by the By-pass Tower

SHE Xiaoli^1,2, PAN Weiguo^1,2, WANG Chengyao¹, NI Yingchun^1,3, QIN Ling^1,2

1. Shanghai University of Electric Power, Shanghai 200090, China;
2. Shanghai Power Environmental Engineering Technology Research Center, Shanghai 200090, China;
3. Jiangsu Ligang Electric Power Co., Ltd., Wuxi 214444, China

Received:2018-05-30 Revised:2018-07-27 Online:2019-01-05 Published:2019-01-14
Supported by:
This work is supported by National Key Research and Development Program (Ultra-low Emission Technology and Equipment Integration Application of High Ash Coal, No. 2016YFC0203704);Sub-topics of the National Key R&D Plan (Ultra-low NO_x Furnace Combustion Control Technology, No.2018YFB0604204-06);Shanghai Science and Technology Commission Scientific Research Project (Study on Coal-fired Flue Gas Ultra-low Emission Wet Desulfurization and Synergistic Denitrification Technology, No.18DZ1202502).

摘要/Abstract

摘要： 脱硫废水成分复杂难以回用，一些电厂已开始采用烟道雾化蒸发处理技术对其进行处理。脱硫废水直接喷入烟道会带来腐蚀、积灰、堵塞等问题，设置旁路蒸发塔对脱硫废水进行干燥是一种较好的选择。为研究此项技术，以某330 MW 机组为例，通过计算脱硫废水与烟气的热质平衡，确定了烟气抽取量，建立了物理模型，利用数值模拟的方法对烟气流场进行优化，对喷嘴布置方式、液滴直径、烟气温度等的选择进行稳态模拟。结果表明：抽取烟气量仅占总烟气量的2.27%，烟气流场即能够充满整个蒸发塔；三喷嘴的雾化蒸发效果可以使蒸发塔出口温度达到设计值120℃；液滴直径80 μm 以下，液滴颗粒无贴壁，液滴直径60 μm时蒸发效果好。为延长颗粒停留时间，使颗粒无贴壁、少团聚，宜采用烟气旋流方式、三喷嘴、60 μm雾化粒径以及600 K以上的入口烟气温度。

关键词: 电厂, 脱硫废水, 蒸发塔, 雾化, 热质平衡, 数值模拟

Abstract: Desulfurization wastewater is difficult to be reused due to its complex composition. Therefore the flue atomization evaporation technology has been applied in the wastewater treatment at some power plants. However, the direct injection of desulfurization wastewater into the flue will cause problems such as corrosion, ash accumulation and clogging. A better option is offered by setting the bypass evaporation tower to dry the desulfurization wastewater. In order to study this technology, taking a 330 MW unit as an example, the flue gas extraction amount was determined by calculating the thermal mass balance between the desulfurization wastewater and the flue gas. Then the physical model was established, and the smoke flow field was optimized by numerical simulation. The steady state simulation was carried out for the nozzle arrangement, droplet diameter and flue gas temperature. The results show that even though the amount of flue gas extracted only accounts for 2.27% of the total flue gas volume, the flue gas flow field is enough to fill the entire evaporation tower. As a result of the atomization evaporation effect from the three nozzles, the evaporating tower outlet temperature can reach reach the designed value of 120 ℃. If the droplet diameter under 80 μm, the droplet particles will not stick to the wall. In particular the desirable evaporation effect is achieved when the droplet diameter is 60 μm. In summary, to prolong the residence time of the particles and make the particles non-adherent and less agglomerated, the flue gas swirling method is preferable with the selection of three nozzles, the atomized particle size of 60 μm and the inlet flue gas temperature of 600 K.

Key words: power plant, desulfurization wastewater, evaporation tower, atomization, thermal mass balance, numerical simulation

中图分类号:

TM621.9
X52

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.

SHE Xiaoli, PAN Weiguo, WANG Chengyao, NI Yingchun, QIN Ling. Numerical Simulation of Evaporative Evaporation of Desulfurization Wastewater by the By-pass Tower[J]. Electric Power, 2019, 52(1): 129-136.

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https://www.electricpower.com.cn/CN/Y2019/V52/I1/129

参考文献 24

[1]	程一杰, 张宁. 水系统集成技术在火力发电厂的应用[J]. 工业水处理, 2107, 33(1):105-108 CHENG Yijie, ZHANG Ning. Application of water system integration technology to thermal power plants[J]. Industrial Water Treatment, 2107, 33(1):105-108
[2]	潘荔, 刘志强, 张博. 中国火电节水现状分析及措施建议[J]. 中国电力,2017, 50(11):158-163. PAN Li, LIU Zhiqiang, ZHANG Bo. Comprehensive analysis and related measures on current situation of water saving of thermal power generation in China[J]. Electric Power, 2017, 50(11):158-163.
[3]	吴帅帅, 李红智, 陈鸿伟, 等. 脱硫废水烟道喷雾蒸发过程的数值模拟[J]. 热力发电, 2015, 44(12):31-36 WU Shuaishuai, LI Hongzhi, CHEN Hongwei, et al. Numerical study on spray evaporation process of desulfurization wastewater in flue duct[J]. Thermal Power Generation, 2015, 44(12):31-36
[4]	MA Shuangchen, CHAI Jin, CHEN Gongda, et al. Research on desulfurization wastewater evaporation:Present and future perspectives[J]. Renewable & Sustainable Energy Reviews, 2016, 58:1143-1151.
[5]	贾绍广, 黄凯, 吴从越, 等. 蒸发塔处理脱硫废水的热量衡算[J].热力发电, 2017, 46(2):61-66, 80. JIA Shaoguang, HUANG Kai, WU Congyue, et al. Heat balance of evaporation tower for FGD wastewater treatment[J]. Thermal Power Generation, 2017, 46(2):61-66, 80.
[6]	DONG Xuefeng, SHEN Guifen, ZHOU Xiaoxiang, et al. The problems and suggestions of the desulfurization wastewater treatment system during the operation[J]. Advanced Materials Research, 2012, 599:521-524.
[7]	康梅强. 脱硫废水烟道蒸发处理工艺系统设计与试验研究[D]. 重庆:重庆大学, 2013.
[8]	刘勇, 赵汶, 刘瑞, 等. 化学团聚促进电除尘脱除PM2.5的实验研究[J]. 化工学报, 2014, 65(9):3609-3616 LIU Yong, ZHAO Wen, LIU Rui, et al. Improving removal of PM2.5 by electrostatic precipitator with chemical agglomeration[J]. CIESC Jorunal, 2014, 65(9):3609-3616
[9]	LIANG Zhengxing, ZHANG Li, YANG Zhongqingg, et al. Evaporation and crystallization of a droplet of desulfurization wastewater from a coal-fired power plant[J]. Applied Thermal Engineering, 2017, 199:52-62.
[10]	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 & Engineering Chemistry, 2018,66:311-317.
[11]	于才渊, 王宝和, 王喜忠. 喷雾干燥技术[M]. 北京:化学工业出版社, 2013.
[12]	刘向军, 徐旭常. 采用不同网格比较伪扩散对四角切圆型炉膛流场计算的影响[J]. 燃烧科学与技术, 1997, 3(2):113-119 LIU Xiangjun, XU Xuchang. Comparison of the influence of pseudo-diffusion on the numerical simulation of flow field in a tangential-firing furnace with different grid systems[J]. Journal of Combustion Science and Technology, 1997, 3(2):113-119
[13]	马双忱, 柴峰, 吴文龙, 等. 脱硫废水烟道喷雾蒸发的数值模拟[J]. 计算机与应用化学, 2016, 33(1):47-53 MA Shuangchen, CHAI Feng, WU Wenlong, et al. The numerical simulation of flue gas desulphurization wastewater spray evaporation[J]. Computers and Applied Chemistry, 2016, 33(1):47-53
[14]	孙慧娟, 张海滨, 白博峰. 雾化锥角对喷雾在横流中蒸发掺混影响[J]. 固体火箭技术, 2013, 36(1):50-55 SUN Huijuan, ZHANG Haibin, BAI Bofeng. Effect of spray angle on mixing of evaporating spray in crossflow[J]. Journal of Solid Rocket Technology, 2013, 36(1):50-55
[15]	胡洪. 喷雾干燥热质传递特性研究[D]. 南京:南京师范大学, 2011.
[16]	柴峰. 脱硫废水蒸发的调控机制研究[D]. 北京:华北电力大学, 2016.
[17]	晋银佳, 王帅, 姬海宏, 等. 深度过滤-烟道蒸发处理脱硫废水的数值模拟[J]. 中国电力, 2016, 49(12):174-179 JIN Yinjia, WANG Shuai, JI Haihong, et al. Numerical simulation of desulfurization wastewater treatment with in-depth filtration-flue evaporation process[J]. Electric Power, 2016, 49(12):174-179
[18]	陈翠玲. 旋流式干燥塔物理场的数值模拟及其结构优化研究[D]. 长沙:长沙理工大学, 2013.
[19]	周力行. 多相湍流反应流体力学[M]. 北京:国防工业出版社, 2002.
[20]	罗隶庵. 传热应用与分析[M]. 北京:清华大学出版社, 1990:103-214.
[21]	E R G埃克特, R M德雷克. 传热与传质分析[M]. 北京:科学出版社, 1983:741-783.
[22]	KUO K K Y. Principles of combustion[M]. New York:John Wiley and Sons, 1986:459-462.
[23]	马力, 仇性启, 王健, 等. 单液滴蒸发影响因素实验研究[J]. 现代化工, 2013, 33(1):103-106 MA Li, QIU Xingqi, WANG Jian, et al. Experimental research on single droplet evaporation factors[J]. Modern Chemical Industry, 2013, 33(1):103-106
[24]	NISHAD K, SADIKI A, JANICKA J. Numerical investigation of adblue droplet evaporation and thermal decomposition in the context of NOx-SCR using a multi-component evaporation model[J]. Energies, 2018, 11(1):222.

脱硫废水旁路塔雾化蒸发数值模拟

Numerical Simulation of Evaporative Evaporation of Desulfurization Wastewater by the By-pass Tower

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脱硫废水旁路塔雾化蒸发数值模拟

Numerical Simulation of Evaporative Evaporation of Desulfurization Wastewater by the By-pass Tower

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