脱硫废水旋转喷雾蒸发与旁路烟道蒸发特性研究

doi:10.11930/j.issn.1004-9649.202109067

中国电力 ›› 2022, Vol. 55 ›› Issue (7): 193-200.DOI: 10.11930/j.issn.1004-9649.202109067

脱硫废水旋转喷雾蒸发与旁路烟道蒸发特性研究

赵宁¹, 冯永新¹, 林廷坤¹, 杨青山¹, 谢志文²

1. 南方电网电力科技股份有限公司，广东广州 510080;
2. 广东电网有限责任公司电力科学研究院，广东广州 510080

收稿日期:2021-09-15 修回日期:2022-02-09 出版日期:2022-07-28 发布日期:2022-07-20
作者简介:赵宁（1986—），男，硕士，从事电力环保工作研究，E-mail：15088050825@163.com
基金资助:
中国南方电网有限责任公司科技项目（高耗水企业废水资源化及零排放关键技术研究与集成应用，GDKJXM20183546）。

Study of Evaporation Performance Between Centrifugal Spray Evaporation and Bypass Flue Evaporation to Treat Desulfurization Wastewater

ZHAO Ning¹, FENG Yongxin¹, LIN Tingkun¹, YANG Qingshan¹, XIE Zhiwen²

1. South China Power Grid Technology Company Limited, Guangzhou 510080, China;
2. Guangdong Power Grid Company Limited Electricity Research Institute, Guangzhou 510080, China

Received:2021-09-15 Revised:2022-02-09 Online:2022-07-28 Published:2022-07-20
Supported by:
This work is supported by Science and Technology Project of China Southern Power Grid Co.(Research and Integrated Application of Key Technologies for Wastewater Resourceization and Zero Discharge of High Water-Consuming Enterprises, No.GDKJXM20183546)

摘要/Abstract

摘要： 针对旋转喷雾和旁路烟道两类高温旁路烟气蒸发技术工艺，开展脱硫废水蒸发特性对比实验，结合可视化荧光示踪法及单液滴蒸发试验研究了废水雾滴在高温烟气中的蒸发过程，分析了烟气温度及烟气停留时间对蒸发性能的影响，并比较了两类废水蒸发工艺的差异。结果表明：脱硫废水液滴接触热烟气后将迅速失去表面自由水分，表面成壳固化为半干颗粒；旋转喷雾蒸发塔内主蒸发区域温度迅速降低，提高烟气温度有助于提升蒸发效率，降低出口灰分含水率；通过适当增大干燥塔尺寸，延长高温烟气在干燥塔内停留时间，可提升热量利用率，实现低气液比条件下的蒸发干燥；两类旁路蒸发工艺相比，旋转喷雾蒸发因雾化效果较好、气液混合均匀，蒸发性能略优于旁路烟道工艺。

关键词: 脱硫废水, 旋转喷雾蒸发, 旁路烟道蒸发, 蒸发特性对比, 停留时间

Abstract: To investigate the high-temperature bypass flue gas evaporation technologies including centrifugal spray evaporation tower and bypass flue evaporation, spray evaporation experiments were conducted using desulfurization wastewater. Evaporation process of wastewater droplets was revealed by the fluorescent tracer technique and single droplet evaporation characteristics. The influences of inlet temperature and residence time on the evaporation efficiency were also discussed. Differences between the two wastewater treatment technologies were analyzed. The results show that after being exposed to the hot flue gas, desulfurization wastewater droplets would rapidly lose their free water, form shells and turn into semi-dried particles, with temperature in the main evaporation zone of the dryer decreasing significantly. Increasing inlet temperature helps to improve the evaporation rate and reduce the moisture content of the outlet ash particles. By increasing the size of the dryers and controlling the amount of extracted flue gas, the residence time of high temperature flue gas in dryers can be extended, which is about to improve the heat utilization and achieve the drying effect with low gas-liquid ratio. In comparison with the bypass flue evaporation technique, centrifugal spray evaporation tower was better due to better atomization performance and uniform gas-liquid mixing.

Key words: desulfurization wastewater, centrifugal spray evaporation, bypass flue evaporation, evaporation characteristics, residence time

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.

ZHAO Ning, FENG Yongxin, LIN Tingkun, YANG Qingshan, XIE Zhiwen. Study of Evaporation Performance Between Centrifugal Spray Evaporation and Bypass Flue Evaporation to Treat Desulfurization Wastewater[J]. Electric Power, 2022, 55(7): 193-200.

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https://www.electricpower.com.cn/CN/Y2022/V55/I7/193

参考文献

[1] MA S C, CHAI J, CHEN G D, et al. Research on desulfurization wastewater evaporation: present and future perspectives[J]. Renewable and Sustainable Energy Reviews, 2016, 58: 1143–1151.
[2] 白璐, 王凯亮, 罗天翔, 等. 脱硫废水在热烟气环境中的蒸发特性及其产物特性研究[J]. 热能动力工程, 2020, 35(5): 188–195
BAI Lu, WANG Kailiang, LUO Tianxiang, et al. Evaporation performance and product characteristics of desulfurization wastewater in hot flue gas environment[J]. Journal of Engineering for Thermal Energy and Power, 2020, 35(5): 188–195
[3] 赵宁, 冯永新, 林廷坤, 等. 热烟气环境下脱硫废水液滴蒸发特性研究进展[J]. 化工进展, 2021, 40(8): 4508–4514
ZHAO Ning, FENG Yongxin, LIN Tingkun, et al. Research progresses on evaporation characteristics of desulfurization wastewater droplets in high-temperature flue gas[J]. Chemical Industry and Engineering Progress, 2021, 40(8): 4508–4514
[4] FENG S Q, XIAO L H, GE Z H, et al. Parameter analysis of atomized droplets sprayed evaporation in flue gas flow[J]. International Journal of Heat and Mass Transfer, 2019, 129: 936–952.
[5] TENG X, STRANGE R, EASOM B. A pilot demonstration of spray dryer evaporation as a method to treat power plant FGD wastewater[C]//Proceedings of the 73 rd Annual International Water Conference. San Antonio, Texas, USA: Curran Associates, Inc. , 2014.
[6] 张净瑞, 梁海山, 郑煜铭, 等. 基于旁路烟道蒸发的脱硫废水零排放技术在火电厂的应用[J]. 环境工程, 2017, 35(10): 5–9
ZHANG Jingrui, LIANG Haishan, ZHENG Yuming, et al. Application of zero liquid discharge system of the desulfurization wastewater based on bypass flue evaporation system in thermal power plants[J]. Environmental Engineering, 2017, 35(10): 5–9
[7] 车广民, 李飞, 陈海杰, 等. 脱硫废水旋转喷雾蒸发特性及氯元素迁移转化试验[J]. 高校化学工程学报, 2020, 34(5): 1313–1320
CHE Guangmin, LI Fei, CHEN Haijie, et al. Study on evaporation of rotary spray of desulfurization wastewater and migration/transformation of chlorine[J]. Journal of Chemical Engineering of Chinese Universities, 2020, 34(5): 1313–1320
[8] 郑郝, 郑成航, 杨正大, 等. 基于烟道喷射蒸发的脱硫废水处理数值模拟研究[J]. 中国环境科学, 2018, 38(12): 4476–4483
ZHENG Hao, ZHENG Chenghang, YANG Zhengda, et al. Numerical simulation study on spray evaporation of desulfurization wastewater in flue duct[J]. China Environmental Science, 2018, 38(12): 4476–4483
[9] 王仁雷, 王丰吉, 戴瑜, 等. 300 MW机组脱硫废水旁路蒸发干燥系统性能试验研究[J]. 工业用水与废水, 2021, 52(03): 23–26
WANG Renlei, WANG Fengji, DAI Yu, et al. Performance test of bypass evaporation drying system for desulfurization wastewater from 300 MW unit[J]. Industrial Water & Wastewater, 2021, 52(03): 23–26
[10] CHEN H, ZHAN L X, GU L Y, et al. Chloride release characteristics of desulfurization wastewater droplet during evaporation process using the single droplet drying method[J]. Fuel, 2021, 305(9): 121551.
[11] LIANG Z X, CHENG X N, ZHANG L, et al. Study of main solutes on evaporation and crystallization processes of the desulfurization wastewater droplet[J]. Energy & Fuels, 2018, 32(5): 6119–6129.
[12] YU M, LE FLOCH-FOUéRé C, PAUCHARD L, et al. Skin layer stratification in drying droplets of dairy colloids[J]. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2021, 620: 126560.
[13] STEPANOV E Y, MASLOV V P, ZAKHAROV D L. A stereo PIV system for measuring the velocity vector in complex gas flows[J]. Measurement Techniques, 2009, 52(6): 626–631.
[14] ABDULLAHI H, BURCHAM C L, VETTER T. A mechanistic model to predict droplet drying history and particle shell formation in multicomponent systems[J]. Chemical Engineering Science, 2020, 224: 115713.
[15] HANDSCOMB C S, KRAFT M, BAYLY A E. A new model for the drying of droplets containing suspended solids[J]. Chemical Engineering Science, 2009, 64(4): 628–637.
[16] 李飞, 陈海杰, 刘峰均, 等. 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, et al. Experimental study on the characteristics of rotating spray evaporation of desulfurization wastewater[J]. Electric Power, 2021, 54(1): 188–195
[17] MASTERS K. The spray drying handbook[M]. New York: Wiley, 1991.
[18] 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
[19] 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
[20] WANG J G, HUANG X Y, QIAO X Q, et al. Experimental study on evaporation characteristics of single and multiple fuel droplets[J]. Journal of the Energy Institute, 2020, 93(4): 1473–1480.
[21] YE X L, AN X Z, ZHANG H, et al. Process simulation on atomization and evaporation of desulfurization wastewater and its application[J]. Powder Technology, 2021, 389: 178–188.

脱硫废水旋转喷雾蒸发与旁路烟道蒸发特性研究

Study of Evaporation Performance Between Centrifugal Spray Evaporation and Bypass Flue Evaporation to Treat Desulfurization Wastewater

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脱硫废水旋转喷雾蒸发与旁路烟道蒸发特性研究

Study of Evaporation Performance Between Centrifugal Spray Evaporation and Bypass Flue Evaporation to Treat Desulfurization Wastewater

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