摘要
采用极限扩散电流技术(LDCT)测定管内液体传质系数(k),通过使用静态混合器、筛板和不锈钢θ环填料与筛板耦合体等强化元件,考察了不同强化手段对管内k的影响,研究了气液多相体系的传质过程。实验结果表明,LDCT能较好地测定单相和多相体系的k。在液体流量为1.00m3/h的条件下,空直管中的k为2.38×10-2m/s;使用筛板、静态混合器和填料与筛板耦合体时,k分别为3.64×10-2,3.96×10-2,5.90×10-2m/s。由实验测定的k结合传递类比定律可得到液体传热系数。
Limiting diffusion current technique （LDCT） was applied to measure the liquid mass transfer coefficient （k） in an empty pipe. The effects of using disturbance facilities, namely static mixer, sieve tray, stainless steel θ ring packings, etc. on k were investigated. Mass transfer processes of gas - liquid multiphase flow system were studied. LDCT was excellent in measuring k of both single phase flow system and multiphase flow system. Under conditions of liquid flow rate 1.00 m^3/h, k of the empty pipe is 2.38 × 10^-2 m/s, and k of using sieve tray, static mixer, and coupling of packings and sieve tray are 3.64 × 10^ -2, 3.96 × 10^ -2 and 5.90 × 10^ -2 m/s, respectively. Furthermore, liquid heat transfer coefficient can be obtained by combination of measured k with the analogy method.
出处
《石油化工》
EI
CAS
CSCD
北大核心
2007年第7期712-715,共4页
Petrochemical Technology
关键词
传质系数
极限扩散电流技术
强化传质
多相流
传热系数
mass transfer coefficient
limiting diffusion current technique
enhanced mass transfer
multiphase flow
heat transfer coefficient
