摘要
在φ391mm搅拌槽中,分别采用双层Brumagin桨、双层三叶后掠式桨和双层A310桨与7种内构件相组合,在无乳化剂下对油水比(质量比)分别为1∶1.5,1∶2.0的煤油-水体系的液-液临界分散进行了研究。从工业实用的角度出发,对前两种桨找到了一种可替代“轻液挡板”的小挡板及其安装方法:内冷管上均布4块小挡板,B/D=0.08,插入液面深度为0.2D。在φ188mm搅拌槽中,于全挡板条件下,以歧化松香皂为乳化剂,分别采用3种不同几何参数的双层Brumagin桨对油水质量比为1∶1.5的煤油-水体系的临界分散进行了研究。结果表明,与无乳化剂情况相比,液-液临界分散转速(N_c)下降30％～40％,临界分散功耗(P_(cv))下降53％～66％;桨径减小会使N_c和P_(cv)增加。
The liquid- liquid critical dispersion for kerosene/water system in the mass ratios of 1 :1.5 and 1 :2.0 in the absence of emulsifier was studied in a φ 391 mm elliptical bottom vessel which was agitated with Brumagin impeller, three-blade retreat impeller and A 310 impeller , respectively ,combined with seven kinds of baffles .A novel configuration types of baffle was found for replacing Nagata 's baffle in dispersing light liquid . Four small baffles were set on the internal cooler ,BW = 0.08 D,h = 0.2 D.On the other hand , the critical dispersion for kerosene/water system in the mass ratio of 1 :1.5 in the presence of emulsifiers was studied in a φ 188 mm agitated vessel under fully baffled conditions for Brumagin impellers . Experimental results showed that the liquid-liquid critical dispersion speed (Nc) decreased by 30% - 40% , critical dispersion power input (Pcv) decreased by 53% - 60% , both Nc and Pcv increased with the decrease of imperller diameter , as compared with the condition of no emulsifier .
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1991年第5期318-322,共5页
China Synthetic Rubber Industry
关键词
搅拌器
搅拌槽
液-液分散
liquid-liquid dispersion
agitated vessel
agitator
critical agitator speed
