摘要
在为微生物高密度培养而设计的１０Ｌ多段内导流筒气升式生物反应器中，研究了Ｎａ２ＳＯ３－空气体系单孔喷嘴和烧结金属管等不同气体分布器对气含率ε、体积氧传质系数ＫＬａ和流动特性的影响．结果表明，孔径为２０～２５μｍ的烧结金属管的整体性能最好，在最佳操作气速３．７～４．０ｃｍ／ｓ下，ε超过１９％，ＫＬａ可达０．２９ｓ－１．其ε和ＫＬａ随Ｕｇ有如变化规律：ε＝０．１９５２－１．５３５１０－２ｅ－１．３９１ＵｇＫＬａ＝０．２７＋２．９７１０－２Ｕｇ－７．２３１０－３Ｕ２ｇ（１．
A 10 L air-lift reactor with multi-section draft tube is designed to reachthe high density cultivation of microorganism. For sodium sulfiteaqueous solution - air system, the effect of different gas distributors on gas hold-up, volumetricgas-liquid mass transfer coefficient and flow characteristics isexamined. The results show that the overall performance of 20～25 μmporous metal pipe is the best. When the gas velocity is in the optimalrange from 3.7 to 4.0 cm/s, ε is over 19% and K L areaches 0.29s -1 . The relationship of ε and K L a with U g can be expressed as ε=0.1952-1.535 10 -2 e -1.391 U g K La =0.27+2.97 10 -2 U g-7.23 10 -3 U 2 g for the range of 1.5<U g<6 cm/s.
出处
《化工冶金》
CSCD
北大核心
1997年第1期57-62,共6页
关键词
气升式反应器
气体分布器
气液传质
发酵
Air-lift reactor, Gas distributor, Gas-liquid mass transfer, Multi-sectiondraft tube
