Wet flue gas desulfurization using micro vortex flow scrubber: Characteristics, modeling and simulation

作     者：Wang, Xiaochen Zhao, Bingtao Ye, Qi Su, Yaxin 

作者机构：Univ Shanghai Sci & Technol Sch Energy & Power Engn 516 Jungong Rd Shanghai 200093 Peoples R China Univ Shanghai Sci & Technol Shanghai Key Lab Multiphase Flow & Heat Transfer 516 Jungong Rd Shanghai 200093 Peoples R China Chongqing Univ Minist Educ China Key Lab Low Grade Energy Utilizat Technol & Syst Chongqing 400044 Peoples R China Donghua Univ Sch Environm Sci & Engn 2999 North Renmin Rd Shanghai 201620 Peoples R China 

出 版 物：《SEPARATION AND PURIFICATION TECHNOLOGY》 (分离与净化技术)

年 卷 期：2020年第247卷

页      面：116915-116915页

核心收录：

学科分类：081702[工学-化学工艺] 0817[工学-化学工程与技术] 08[工学] 

基　　金：Key Laboratory of Low-Grade Energy Utilization Technologies & Systems (Chongqing University), Ministry of Education of China [LLEUTS-202009] Natural Science Foundation of Shanghai [17ZR1419300] 

主　　题：Wet flue gas desulfurization Micro vortex flow Mass transfer Semi-empirical correlation Flow pattern 

摘      要：It has been a great concern that the process intensification and the system complexity for wet flue gas desulfurization (wet-FGD) with chemical absorption. To enhance the mass transfer performance of the De-SO2 process under the simple conditions, a micro-vortex-flow based scrubber was designed to investigate the characteristics of the wet-FGD with K2CO3 solution. The effects of the key operating parameters on De-SO2 performances were comprehensively examined, including absorbent concentration, inlet SO2 concentration, and liquid-gas flow rate. It was found that the De-SO2 efficiency increased generally with the increasing K2CO3 concentration, inlet SO2 concentration, and liquid flow rate but decreased with increasing gas flow rate. However, the overall gas-phase mass transfer coefficient increased as these parameters increase. Within the measured range, the overall gas-phase mass transfer coefficient varied from 2.88 x 10(-3) to 1.13 x 10(-2) kmol/m(3).kPa.s, and the De-SO2 efficiency was observed in the range of 75.1% to 91.8%. On this basis, a semi-empirical correlation for predicting the vortex-flow-based De-SO2 mass transfer performance was developed with R-2 = 0.958. Finally, the computational fluid dynamics (CFD) simulation was employed to explore the relationship between the vortex flow and the principle of process intensification. The results may provide a positive reference for the industrial application of De-SO2 with the micro vortex flow scrubbing.