摘要
搅拌是全混厌氧消化工程中不可或缺的工艺。适当的搅拌形式可优化流场模拟,使发酵物料分布更加均匀,从而提高沼气的产量和有机物的去除率。气体分散器的结构直接影响全混厌氧消化罐内搅拌效果。在原兰州全混厌氧消化罐A型气体分散器模型的基础上构建了B、C两种结构的气体分散器,并通过CFD多相流模型模拟分析3种分散器结构对全混厌氧消化罐内搅拌流场的影响。结果表明:在沼气流量为500 m^(3)·h^(-1)时,A、B、C型分散器的引流能力分别为8200 m^(3)·h^(-1),6560 m^(3)·h^(-1),9200 m^(3)·h^(-1),优化后的C型分散器比原A型引流能力提高了12%,可增强全混厌氧消化罐内搅拌强度。
Stirring is an indispensable process for complete anaerobic fermentation engineers.Adopting appropriate stirring method can optimize flow field morphology which results in enhancing biogas production and organic pollutant removal.The structure of the gas disperser will directly affect the mixing effect of complete mixed anaerobic digestion tank Biogas mixing,In this study,B and C type of gas disperser is invented,and numerical simulated by CFD.When amount of biogas is 500 m^(3)·h^(-1),the drainage capacity of type A,B and C dispersers is 8200 m^(3)·h^(-1),6560 m^(3)·h^(-1),9200 m^(3)·h^(-1) respectively.Drainage capacity of type C gas disperser is 12%higher than the original type A,and can enhance the mixing strength in complete mixed anaerobic digestion tank.
作者
杨学志
YANG Xuezhi(Shanghai Environmental Engineering Design and Research Institute,Shanghai 200085,China)
出处
《中国沼气》
2022年第3期73-79,共7页
China Biogas
关键词
CFD
数值模拟
气体分散器
厌氧发酵
搅拌
CFD
numerical simulation
disperser
anaerobic fermentation
mixing
作者简介
杨学志(1986-),男,工程师,主要研究方向为有机垃圾资源化利用与废水处理。
