A Method of Assessing Micro-Mixing of Wet Particles in Double-Blade Kneader Mixers Using Image Analysis

Nishi Kazuhiko, Suzuki Yasuo, Kaminoyama Meguru, Kamiwano Mitsuo

doi:10.1252/kakoronbunshu.31.308

Bibliographic Information

Other Title

各種双腕式湿潤粉体ねつ和機における画像解析による微視的混合状態の評価法
各種双腕式湿潤粉体捏和機における画像解析による微視的混合状態の評価法
カクシュソウワンシキシツジュンフンタイネツワキニオケルガゾウカイセキニヨルビシテキコンゴウジョウタイノヒョウカホウ

Search this article

Abstract

Mixing experiments were conducted by performing image analysis of tracer particles for double-blade kneader mixers with various types of mixing vessels and blades. A method of assessing the processes of macro- and micro-mixing for wet particle systems was established, and this method was applied to the assessment of mixing performance of double-blade kneader mixers.<br>The relationship between the shapes of R(r) curves that represent the degree of mixing proposed by Danckwerts and aspect ratios of segregations were investigated, where R(r) is the correlation coefficient used to calculate the scale of segregation for the two measured points of separated by the distance r.<br>The difference of degree of mixing between actual and ideal R(r) curves was defined as the distortion degree of mixing.<br>For these analyses, we developed a procedure for analyzing the measured images of mixing processes of wet particles accompanied with tracer particles of almost the same sizes as wet particle sizes at an appropriate magnification corresponding to the state of micro-mixing at particle-size level.<br>As a result, it was shown that micro-mixing could be assessed through detailed investigation of particle mixing processes in which the scale of segregation decreases and the aspect ratios of segregation approach the specific value of particle.

Journal

KAGAKU KOGAKU RONBUNSHU

KAGAKU KOGAKU RONBUNSHU 31 (5), 308-316, 2005

The Society of Chemical Engineers, Japan

Keywords

Details 詳細情報について

Export