李金芳,韩高岩,谢娜,张晓晴,王智
LI Jinfang,HAN Gaoyan,XIE Na,ZHANG Xiaoqing,WANG Zhi

• 1:杭州意能电力技术有限公司
• 2:国网浙江省电力有限公司电力科学研究院
• 3:华北电力大学(保定)动力工程系

摘要(Abstract)：

由于不同机组负荷会影响三塔合一间接空冷系统的流动换热特性和烟气扩散效果，对某1 000 MW机组三塔合一间接空冷塔进行了数值研究。结果表明：随着负荷增加，三塔合一间接空冷塔的抽力和通风量在100%负荷时分别是50%负荷时的1.47倍和1.3倍，同时高负荷运行的空冷塔冷却能力更强；增加负荷会减少SO2在空冷塔内壁上的浓度，增加烟气的抬升高度，相对于50%负荷，在100%负荷时SO_2浓度减少了4.55 mg/m~3，烟气最大扩散高度最多时提升了16.72 m。
Different unit loads affect the flow heat transfer characteristics and flue gas diffusion of a “three-in-one” indirect air-cooling system. A numerical study is carried out on the tower of a 1 000 MW unit. The results show that as the load increases, the extraction effect and ventilation capacity of the tower at 100% load are 1.47 and 1.3 times higher than those at 50% load, respectively. Moreover, the cooling capacity of the tower is larger at higher loads.Load increase can reduce the concentration of SO_2 on the inner wall of the air-cooling tower and raise the lift height of flue gas. At 100% load, the SO_2 concentration is reduced by 4.55 mg/m~3, and the maximum flue gas diffusion height is raised by up to 16.72 m compared to 50% load.

关键词(KeyWords)： 数值模拟;变负荷;烟气扩散;三塔合一;间接空冷塔
numerical simulation;variable load;flue gas diffusion;“three-in-one” tower;indirect air-cooling tower

Abstract:

Keywords:

基金项目(Foundation): 杭州意能电力技术有限公司科技项目（EERD2021-03）

作者(Author): 李金芳,韩高岩,谢娜,张晓晴,王智
LI Jinfang,HAN Gaoyan,XIE Na,ZHANG Xiaoqing,WANG Zhi

DOI: 10.19585/j.zjdl.202302014

参考文献(References)：

• [1]汤蕴琳.火电厂“烟塔合一”技术的应用[J].电力建设，2005,26(2):11-12.TANG Yunlin.Application of technology for “combining stack and cooling tower into one” in coal-fired power plants[J]. Electric Power Construction,2005,26(2):11-12.
• [2]林勇.烟塔合一技术特点和工程数据[J].环境科学研究，2005,18(1):35-39.LIN Yong.The technology characteristics of natural draft cooling tower with flue gas injection and its engineering data[J]. Research of Environmental Sciences,2005,18(1):35-39.
• [3]MA H,SI F Q,LI L,et al.Effects of ambient temperature and crosswind on thermo-flow performance of the tower under energy balance of the indirect dry cooling system[J].Applied Thermal Engineering,2015,78:90-100.
• [4]马义伟，高延生，玉炜，等.电厂空冷技术的进展[J].中国电力，1996,29(2):3-5.MA Yiwei,GAO Yansheng,YU Wei,et al. Dry cooling technology progress of thermal power plants[J]. Electric Power,1996,29(2):3-5.
• [5]丁峰，李时蓓，邢可佳.烟塔合一项目烟气抬升影响因素分析[J].环境工程技术学报，2011,1(2):173-180.DING Feng,LI Shibei,XING Kejia. Factors analysis of gas lift height from cooling tower[J].Journal of Environmental Engineering Technology,2011,1(2):173-180.
• [6]陈凯华，宋存义，李强.烟塔合一烟气排放的数值分析[J].电站系统工程，2008,24(2):12-14.CHEN Kaihua,SONG Cunyi,LI Qiang.Numerical analysis of plume rise of cooling tower with flue gas injection[J].Power System Engineering,2008,24(2):12-14.
• [7]梁月明.烟塔合一技术的研究与分析[D].北京：华北电力大学，2007.LIANG Yueming. Study on natural draft cooling towers with flue gas injection[D]. Beijing:North China Electric Power University,2007.
• [8]宫栋杰.“烟塔合一”内衬防腐技术的研究[J].煤炭与化工，2014,37(6):117-118.GONG Dongjie.Research on “smoke tower one” lined corrosion technology[J].Coal and Chemical Industry,2014,37(6):117-118.
• [9]姚友成，侯宪安.烟塔合一的冷却塔腐蚀与防护[J].电力勘测设计，2006(5):17-20.YAO Youcheng,HOU Xianan. Corrosion and protection of NDCT with flue gas discharge[J].Electric Power Survey&Design,2006(5):17-20.
• [10]浮杰.烟塔合一技术塔内流动的研究[D].北京：华北电力大学，2008.FU Jie.Study on tower’s interior flowing of natural draft cooling towers with flue gas injection[D].Beijing:North China Electric Power University,2008.
• [11]席新铭.大型间接空冷塔空气流动特性及流场优化研究[D].北京：华北电力大学，2015.XI Xinming.Study on air flow characteristics and optimization for large scale dry cooling tower[D]. Beijing:North China Electric Power University,2015.
• [12]崔克强，李浩.燃煤发电厂烟塔合一环境影响之一：烟气抬升高度的对比计算[J].环境科学研究，2005,18(1):27-30.CUI Keqiang,LI Hao.The environmental effect of natural draft cooling towers with flue gas injection in a burning coal plant partⅠ：the parallel calculation of plume rise[J].Research of Environmental Sciences,2005,18(1):27-30.
• [13]王康慧，杨柳，盛重义，等.烟塔合一排烟对近距离环境影响的预测研究[J].热能动力工程，2020,35(5):176-182.WANG Kanghui,YANG Liu,SHENG Zhongyi,et al.Prediction study on the effect of flue gas discharge from natural draft cooling tower on nearby atmosphere environment[J]. Journal of Engineering for Thermal Energy and Power,2020,35(5):176-182.
• [14]蒋晓锋，马欣敏，朱一飞，等.间接空冷三塔合一的数值模拟[J].汽轮机技术，2015,57(2):128-132.JIANG Xiaofeng,MA Xinmin,ZHU Yifei,et al.A numerical simulation of indirect air cooling with three-towers-inone[J].Turbine Technology,2015,57(2):128-132.
• [15]王梦洁.“三塔合一”间接空冷系统热力性能分析和优化研究[D].北京：华北电力大学，2016.WANG Mengjie. Thermo-hydraulic performance analysis and optimization study of indirect dry cooling system incorporate desulfurization tower and chimney[D]. Beijing:North China Electric Power University,2016.
• [16]焦庆雅.三塔合一间接空冷系统流动传热特性研究[D].北京：华北电力大学，2018.JIAO Qingya.Research on the flow and heat transfer characteristics of an indirect air cooling system with three towers[D]. Beijing:North China Electric Power University,2018.
• [17]赵文升，郭浩，宋百川.三塔合一间接空冷塔结构优化研究[J].汽轮机技术，2017,59(4):257-260.ZHAO Wensheng,GUO Hao,SONG Baichuan.Structrue optimization for an indirect air cooling tower with three incorporate towers[J].Turbine Technology,2017,59(4):257-260.
• [18]孔德满，袁益超.三塔合一间接空冷塔换热能力与烟气扩散的数值模拟[J].热能动力工程，2020,35(3):193-200.KONG Deman,YUAN Yichao. Numerical simulation of heat transfer capacity and flue gas diffusion in an indirect air cooling tower with three incorporate towers[J].Journal of Engineering for Thermal Energy and Power,2020,35(3):193-200.
• [19]刘昆.三塔合一间接空冷系统变工况运行特性研究[D].北京：华北电力大学，2021.LIU Kun. Research on operating characteristics of three towers in one indirect air cooling system under variable operating conditions[D]. Beijing:North China Electric Power University,2021.
• [20]YANG S,WANG G F,YANG X L,et al. Numerical study on smoke plume for natural draft cooling tower with flue gas injection[C]//DEStech Transactions on Environment,Energy and Earth Sciences,2018.
• [21]MICHIOKA T,SATO A,KANZAKI T,et al.Wind tunnel experiment for predicting a visible plume region from a wet cooling tower[J].Journal of Wind Engineering and Industrial Aerodynamics,2007,95(8):741-754.
• [22]王航.大气环境对湿法脱硫“烟塔合一”技术烟羽扩散的影响[D].北京：华北电力大学，2013.WANG Hang. Effects of atmospheric environment to smoke plume diffusing by adapting wet desulphurization and cooling tower discharging[D]. Beijing:North China Electric Power University,2013.
• [23]YANG L J,CHEN L,DU X Z,et al.Effects of ambient winds on the thermo-flow performances of indirect dry cooling system in a power plant[J]. International Journal of Thermal Sciences,2013,64:178-187.
• [24]LIAO H T,YANG L J,DU X Z,et al. Influences of height to diameter ratios of dry-cooling tower upon thermo-flow characteristics of indirect dry cooling system[J].International Journal of Thermal Sciences,2015,94:178-192.
• [25]王楠，游庆龙，刘菊菊.1979—2014年中国地面风速的长期变化趋势[J].自然资源学报，2019,34(7):1531-1542.WANG Nan,YOU Qinglong,LIU Juju. The long-term trend of surface wind speed in China from 1979 to 2014[J]. Journal of Natural Resources,2019,34(7):1531-1542.
• [26]熊敏诠.近30年中国地面风速分区及气候特征[J].高原气象，2015,34(1):39-49.XIONG Minquan.Climate regionalization and characteristics of surface winds over China in recent 30 years[J].Plateau Meteorology,2015,34(1):39-49.
• [26]刘宏丽，黄泽亮，程圣明.烟气湿度调质对颗粒物比电阻影响的实验研究[J].山西电力，2018(2):25-28.LIU Hongli,HUANG Zeliang,CHENG Shengming.Experimental study on the influences of flue gas humidity on particle specific resistivity[J].Shanxi Electric Power,2018(2):25-28.
• [26]吴文庆，杜小泽，杨立军.脱硫废水烟气喷射蒸发流动特性实验研究[J].发电技术，2020,41(5):561-569.WU Wenqing,DU Xiaoze,YANG Lijun. Experimental study on characteristics of spraying evaporation flow of FGD wastewater in flue gas[J].Power Generation Technology,2020,41(5):561-569.