高黏度流体混合机混合均匀度试验.pdf

第27卷第6期
农业丁.程学报
Vo1.27 No6
2011年6月
Transactions of the CSAE
Jun.2011
Mixture homogeneity in a high-viscous flow mixer
Yang Mingjint-2, Li Xiwen, Shi Tielin, Yang Shuzi
College of Engineering and Technology, Southwest University, Chongqing 400716, China
2. School of Mechanical Science and Engineering, Huazhong University of Science and Technolog, Wuhan 430074, China)
Abstract: For promoting performance and optimizing parameters of planetary twin screw mixers that process a high-viscous flow,
an approach for the impact of mixing parameters on mixture homogencity of the mixing slurry was proposcd in this study
Definition of density-ased intensity of segregation(DB1OS)was presented to evaluate mixture homogeneity of the slurry By
means of orthogonal factor al experiment design technique and statistical analyses of range and variance, major parameters of the
mixing process and their significance affecting the mixture homogeneity were obtained, Experimental and amalysis results showed
that the delta value of mean DBIOS of ingredient factor of the slurry was 138.275, much larger than that of other factors
Ingredient factor significantly contribu d o the m ue mo enemy at a significance level of 0.10 n redient of coarse solid
phase particle had bad performance of mixture homogeneity. A 3-D sampling model was presented for good representation of the
samples being taken in this study as well
Key words: twin screw mixer, mixture homogeneity, intensity of segregation, expermental design, analysis of variance
doi:10.3969/issn.1002-6819.201106.025
CLC number: $220.4, TQ027 1
Document code: A
Article ID:1002-6819(2011)-06-0137-0
Yang Mingjin, Ii Xiwen, Shi Tielin, et all Mixture homogeneity in a high-viscous flow mixer []. Transactions of the CSAE, 2011
27(6): 137-142.(in English with Chinese abstract)
杨明金,李锡文,史铁林,等.高黏度流体混合机混合均匀度试验[.农业工程学报,201127(6):137-142
Introduction
which may lead to turbulence, shear velocity must be
controlled under a certain value in the mixing flow, and then
3. Particle mixing is an important step in a variety of the flow is often in the laminar state(s), Twin screw mixers
plications for spanning food, agricultural post-product,
arc commonly adopted to mix the laminar flow fluid. In our
polymer and pharmaceutical industries=, and it can be previous work, a set of operating and design parameters of
generally subdivided into dry mixing, in which the fluid
the twin screw mixers that were found to affect the mixture
totally in solid phase, and wet mixing, in which the fluid is quality. But for a given mixer and the mixing materials.
partially in solid phase and partially in liquid phase. Bato
design parameters can not be unlimitedly improved, thus
mixers are powerful mixing machines for wet mixing, where optimization of operating process and operating parameters
solid phase particles of dif erent ingredients and different is of vital importance The operating process and parameter
sizes are mixed with materials of liquid phase. Despite the that can be optimized include
Ingredient
of the mixing
long history and broad application of wet mixing, the mixing materials, adding sequence and moment of particles of
and segregation mechanisms in a batch mixer are not fully different size, process intervals of diferent mi