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《Research of Environmental Sciences》 2007-02
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Study on Humifying and Cooling in Tower of Semi-Dry Flue Gas Desulphurization

LIN Jun~(1,2),TIAN Gang~1,SHI Ying-jie~1,ZHONG Ru-gang~21.Chinese Research Academy of Environmental Sciences,Beijing 100012,China2.College of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100022,China  
Desulphurization reaction velocity and reaction efficiency can be improved preferably in gas-liquid-solid three-phase.Addition of ash and water changes the reaction course of semi-dry flue gas desulphurization(FGD) technology,and the reaction activation energy lowers because of the intervention of transportation steam.Although the spray of more mass can increase desulphurization efficiency,it also makes the wall wet,harden the ash and influence fluid of ash.Humifying and cooling with two-liquid nozzle in tower,semi-dry FGD technology creates suited temperature 12~18 K and humidity condition 60% for desulphurization. A study of vaporizing course of pulverization particulate in tower is made based on calculation method of heat transfer and mass transfer.It is shown that the main pulverization particulate distributing dimension of liquid-phase in tower is about 80 μm,vaporizing time is 0.691 s.The program proposed here and validated by demonstration engineering can guide the calculation of increasing humidification in the tower of semi-dry FGD,and provide primary rules for the optimization of tower inner structure.
【Fund】: 国家高技术研究发展计划(863)项目(2001AA642030-3)
【CateGory Index】: X701.3
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