UASB反应器三相分离器的数值模拟研究
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摘要
为探索UASB反应器中三相分离器沉淀区以及回流缝对分离器内流场及气、液、固三相分离性能的影响,以Mixture多相流模型为理论框架,利用计算流体动力学(CFD)模拟分析了不同沉淀区高度(0.55,0.65,0.75,0.85 m)和不同回流缝宽度(0.2,0.3,0.4,0.5 m)对气体体积分数随时间推移的变化规律.结果表明:沉淀区高度为0.75 m,回流缝宽度为0.3 m,气体分离效果最好.
In order to explore the influences of three-phase separator's settling zone and return crack in the UASB reactor on the separator's internal flow field,gas,fluid and solid separation performance,computational fluid dynamics(CFD) is used to analyze time-varying law of gas volume fraction for the different heights of settling zone(0.55 m,0.65 m,0.75 m,and 0.85 m)and different return crack widths(0.2 m,0.3 m,0.4 m and 0.5 m) by using mixture multi-phase flow model with the theoretical framework. The results show that gas separation effect is the best when the height of settling zone is 0.75 m and return crack width is 0.3 m.
In order to explore the influences of three-phase separator's settling zone and return crack in the UASB reactor on the separator's internal flow field,gas,fluid and solid separation performance,computational fluid dynamics(CFD) is used to analyze time-varying law of gas volume fraction for the different heights of settling zone(0.55 m,0.65 m,0.75 m,and 0.85 m)and different return crack widths(0.2 m,0.3 m,0.4 m and 0.5 m) by using mixture multi-phase flow model with the theoretical framework. The results show that gas separation effect is the best when the height of settling zone is 0.75 m and return crack width is 0.3 m.
引文
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[3]张自学. UASB反应器的数值模拟及优化[J].广东:广东化工,2017,44(17):47-49.
[4]崔玮琳,汪瑛,孟陵,等.三相分离器创新结构数值模拟及优化设计[J].辽宁化工,2017,46(11):1109-1111.
[5]李彤蔚,周冰欣,张煜,等.三相分离器分离效果受控因素及优化评价[J].石油化工应用,2017,36(12):44-48.
[6]孙立强,王迪,朱红波,等.三相分离器设计及CFD模拟研究进展[J].石油化工设备技术,2017,38(4):6-12.
[7]朱红钧,林元华,谢龙汉. FLUENT流体分析及仿真实用教程[M].北京:人民邮电出版社,2010.
[8]周力行.多相湍流反应流体力学[M].北京:国防工业出版社,2002.
[9]韩占忠,王敬,兰小平. FLUENT:流体工程仿真计算实例与应用[M].北京:北京理工大学出版社,2004.
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