Journal of Shandong University(Engineering Science) ›› 2020, Vol. 50 ›› Issue (5): 56-63.doi: 10.6040/j.issn.1672-3961.0.2019.539

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Experimental and theoretical studies on 1-D model of heat and mass transfer performance for wet flue gas desulfurization scrubber

CHEN Baokui, SUN Fengzhong*, GAO Ming, SHI Yuetao   

  1. School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
  • Published:2020-10-19

Abstract: To predict the slurry temperature in wet flue gas desulfurization(WFGD)system, a concept of insulation saturation temperature of wet flue gas was put forward, and the functional relationship between slurry temperature and inlet flue gas temperature and moisture content was deduced. Based on the predicted slurry temperature, a 1-D coupled mathematical model of droplets motion, heat and mass transfer and pressure loss of liquid-gas two phases was established, the influence of three-dimensional inhomogeneity of desulfurization system on model accuracy was analyzed. In terms of the main operating variables in desulfurization system(diameter of slurry particle, inlet temperature of flue gas and ratio of liquid to gas), the 1-D distribution law of the related parameters was obtained by the Runge-Kutta iteration method. In order to verify the model, the field test and physical model test were carried out respectively. The results showed that the predicted slurry temperature was in good agreement with the measured parameters, the maximum error was 4.56%; the diameter of slurry particle was the main factor affecting heat and mass transfer; the velocity of particles decayed rapidly in the process of decline, and tended to the final invariant value; the temperature of the flue gas was distributed exponentially with the height of the tower. Compared with the predicted values, the maximum errors of temperature and pressure distribution from the experimental results were 4.72% and 6.46% respectively. The model had high accuracy, which was of guiding significance to the design, operation and study on mass transfer of SO2 in WFGD system.

Key words: wet flue gas desulfurization, praying tower, heat and mass transfer, adiabatic saturated temperature, slurry temperature

CLC Number: 

  • TK124
[1] 尚光旭, 司传海, 刘媛.“十三五”除尘脱硫脱硝除尘行业政策导向及发展趋势[J].中国环保产业, 2016(10):21-23. SHANG Guangxu, SI Chuanhai, LIU Yuan. Industrial policy guiding and development trend for dust removal desulfurization and denitration in “the Thirteenth Five-year Plan”[J]. China Environmental Protection Industry, 2016(10): 21-23.
[2] 钟毅, 高翔, 王惠挺, 等.基于CFD技术的湿法烟气脱硫系统性能优化[J].中国工程电机学报, 2018, 28(32):18-22. ZHONG Yi, GAO Xiang, WANG Huiting, et al. Performance optimization of wet flue desulphrization system based on CFD technology[J]. Proceedings of the CSEE, 2018, 28(32): 18-22.
[3] DE GISI S, MOLINO A, NOTARNICOLA M. Enhancing the recovery of gypsum in limestone-based wet flue gas desulfurization with high energy ball milling process: a feasibility study[J]. Process Saf Environ Prot, 2017, 109: 117-129.
[4] 郝文阁, 赵光玲, 王东鹏, 等.石灰石湿法脱硫过程中SO2吸收数学模型[J].环境工程学报, 2008, 2(7):969-972. HAO Wenge, ZHAO Guangling, WANG Dongpeng, et al. Mathematic model of absorption of sulfur dioxide in wet flue gas desulfurizaiton[J]. Chinese Journal of Environmental Engineering, 2008, 2(7): 969-972.
[5] GUELLI U, OUZA S M A, SANOS F B F, et al. Limestone dissolution in flue gas desulfurization-experimental and numerical study[J]. Journal of Chemieal Technology & Biotechnology, 2010, 85: 1208-1214.
[6] OLAUSSON S, WALLIN M, BJERLE I. A model for the absorption of sulfur dioxide into a limestone slurry[J]. Chemical Engineering Journal, 1993, 51: 99-108.
[7] XU Zhen, XIAO Yunhan, WANG Yue. Experimental and theoretical studies on air humification by a water spray at elevated pressure[J]. Applied Thermal Engineering, 2007, 27(14/15): 2549-2558.
[8] LINDQUIST T, THERN M, TORISSON T. Experimental and theoretical results of a humidification tower in an evaporative gas turbine cycle pilot[C] //Proceedings of the ASME Turbo Expo 2002. New York, USA: American Society of Mechanical Engineers, 2002.
[9] 凡凤仙, 杨林军, 袁竹林, 等.喷淋条件下水汽饱和度分布特性[J].化工学报, 2009, 60(7):1644-1650. FAN Femgxian, YANG Linjun, YUAN Zhulin, et al. Properties of water vapor supersaturation under spray scrubbing conditions[J]. Journal of Chemical Industry and Engineering, 2009, 60(7): 1644-1650.
[10] 熊桂龙, 辛成运, 杨林军, 等.蒸汽相变协同湿法脱硫系统中温湿度变化特性[J]. 中国电机工程学报, 2011, 31(8): 18-24. XIONG Guilong, XIN Chengyun, YANG Linjun, et al. Temperature and humidity characteristics of flue gas from combined wet flue gas desulfurizaion system and heterogenous condensation[J]. Proceedings of the CSEE, 2011, 31(8): 18-24.
[11] WU Hao, YANG Linjun. Improving the removal of fine particles by heterogeneous condensation during WFGD processes[J]. Fuel Processing Technology, 2016, 145: 116-122.
[12] WU Hao, PAN Danping. Improving the removal of fine particles from desulfurized flue gas by adding humid air[J]. Fuel, 2016, 184: 153-161.
[13] 林永明, 高翔.大型湿法烟气脱硫喷淋塔内阻力特性数值模拟[J].中国电机工程学报, 2008, 28(5): 28-33. LIN Yongming, GAO Xiang. Numerical simulation on resistance characteristic of large scale wet flue gas desulfrization spraying scrubber[J]. Proceedings of the CSEE, 2008, 28(5): 28-33.
[14] LI Hongwei, DUAN Hongwei, WANG Wenbo. Numerical simulation study on different spray rates of three-area water distribution in wet cooling tower of fossil-fuel power station[J]. Applied Thermal Engineering, 2018, 130: 1558-1567.
[15] MOHAMMAND Zunaid, QASIM Murtaza, SAMSHER Gautam. Energy and performance analysis of multi droplets shower cooling tower at different inlet water temperature for air cooling application[J]. Applied Thermal Engineering, 2017, 121: 1070-1079.
[16] 潘卫国, 冷雪峰.不同喷淋层投运方式下脱硫塔内流场特性的数值研究[J].上海电力学院学报, 2009, 25(5):413-417. PAN Weiguo, LENG Xuefeng. Numerical simulation of flow field inside WFGD under different spray levels operation[J]. Journal of Shanghai University of Electric Power, 2009, 25(5): 413-417.
[17] 林瑜, 陈德珍.大型脱硫塔喷淋段气液两相流动与传热的数值仿真与验证[J].燃烧科学与技术, 2016, 22(1):1-8. LIN Yu, CHEN Dezhen. Numerical simulation and verification of gas-liquid two-phase flow and heat transfer in spraying zone of large-scale desulfurization absorption tower[J]. Journal of Combustion Science and Technology, 2016, 22(1): 1-8.
[18] 沈维道, 蒋志敏, 童钧耕.工程热力学[M].北京:高等教育出版社, 2008.
[19] 王立秋, 魏焕彩, 周学圣.工程数值分析[M]. 济南:山东大学出版社, 2002.
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