THE SHEAR-THINNING PHENOMENON OF BAGASSE KRAFT BLACK LIQUOR FLUID  

作　　者：RendangYang KefuChen JunXu HengZhang QifengChen JinWang 

机构地区：[1]StateKeyLaboratoryofPulp＆PaperEngineering,Guangzhou,510641,China

出　　处：《天津科技大学学报》2004年第A01期163-167,共5页Journal of Tianjin University of Science & Technology

摘　　要：The flow curvesshear-rate rangeby using theof bagasse Kraft black liquor over aof 10-1 s- 1-103s- 1 were investigatedRheometric RFSII rheometerExperimental results show that Bagasse black liquorsare non-Newtonian fluids instead of Newtonian fluidsat higher solids contents, and the viscosities of blackliquor would decrease about 2-3 orders of magnitudewith an increase in the shear rates. The apparentviscosity and flow behavior of bagasse black liquorare also affected by its solids content, and the highersolids content the more shear-thinning bagasse blackliquor fluid is. In addition, the power-law equationwas utilized to fit these flow curves at differentconditions. Finally, the significances ofshear-thinning properties of bagasse black liquor inthe chemical recovery system, such as frictioncalculation of pipe and design optimization of thewhole recovery system, were presented.The flow curves of bagasse Kraft black liquor over a shear-rate range of 10-1s-1~103s-1 were investigated by using the Rheometric RFSII rheometer. Experimental results show that Bagasse black liquors are non-Newtonian fluids instead of Newtonian fluids at higher solids contents, and the viscosities of black liquor would decrease about 2~3 orders of magnitude with an increase in the shear rates. The apparent viscosity and flow behavior of bagasse black liquor are also affected by its solids content, and the higher solids content the more shear-thinning bagasse black liquor fluid is. In addition, the power-law equation was utilized to fit these flow curves at different conditions. Finally, the significances of shear-thinning properties of bagasse black liquor in the chemical recovery system, such as friction calculation of pipe and design optimization of the whole recovery system, were presented.

关 键 词：剪切稀释现象 黑液 蔗渣牛皮纸 剪切速率 流曲线 化学恢复 摩擦力计算 

分 类 号：TS74[轻工技术与工程—制浆造纸工程]