Water recovery from wet flue gas by combining the amplification tube condensation and inlet particle-sorting cyclone separation. (October 2021)

• Record Type: Journal Article
• Authors: Wang, Fei; Yang, Xiaoyang; Fu, Pengbo; Yang, Fenglin; Cheng, Fangqin
• Is Part Of: Applied thermal engineering. Volume 197(2021)
• Publication Date: 2021-10
• Subjects: Cyclone separation -- Wet flue gas -- Condensation -- Amplification tube -- Inlet particle-sorting cyclone; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2021.117205
• Languages: English
• ISSNs: 1359-4311

Abstract

Graphical abstract: Highlights: A novel technical route was used to recovery of water from flue gas. The amplification tube and separators were designed to enhance mass transfer process. The amplification tube and separators have relatively economic performances. Abstract: The wet flue gas which is generated after the Wet flue gas desulfurization process contains huge amount of water vapor, soluble salts and insoluble particles. Direct discharging will not only lead to the significant waste of water resources, but also causes continuous smog. Therefore, a series of amplification tube with different sizes (length of 40 mm, 80 mm, 120 mm, 160 mm and 200 mm) were designed to condense water vapor by changing the partial pressure. Meanwhile, a particle storing classifier combining with cyclone was used for improving the collection efficiency of condensed water. The result showed that the water collection efficiency raised first with increasing the length of amplification tube and dropped after it reached to the maximum point (11.2%) at the length of 120 mm with the pressure drop lower than 72.5 Pa. Furthermore, after classifier and cyclone separator were incorporated with the optimized amplification tube, the highest water collection efficiency increased by 9.4%, reaching about 19.4% which is equivalent to reducing the flue gas temperature by 4 °C by conventional heat exchange technique. This novel technology was successfully applied to recover water and deep purify wet flue gas for the first time and has great potential in industrial wet flue gas pollution control.