An Optic Method Based on LED Reflection for Measurement of the Characteristics of Particle Suspension in a Liquid-Solid Stirred Tank
ZHOU Hong-bao LI Xiang-yang YANG Chao MAO Zai-sha ZHANG Guang-ji
Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Institute of Process Engineering, Chinese Academy of Sciences Institute of Processing Engineering ，CAS
Abstract：An optic method based on LED reflection was proposed for determination of the characteristics of particle suspension in a liquid-solid stirred tank. The characteristics of particle suspension in water-silica two-phase system in an oval-bottomed stirred tank of 380 mm in diameter were measured using this method. The results show that appropriate location of measuring point for critical impeller speed Njs should be in the lower part of the tank and the radial position has little effect on Njs. Njs obtained by the optic method was close to that obtained by the withdrawal sampling method in the whole range of solid loading and the average relative error between them was only 4.0%. Njs obtained by the visual observation was bigger than those from other two methods. The optic method can be operated faster and more easily than the withdrawal sampling method and applied in opaque vessels compared with the visual observation. Nus quickly determined by the optic method is bigger with higher solid loading.highest material flow rate 500, 620 and 820 m3/h, separately. Based on the transport characteristics and pressure gradient trend along the conveying direction, the pipeline could be divided into developing, transition and developed sections.
周宏宝 李向阳 杨超 毛在砂 张广积. 基于LED光源反射的液固搅拌槽中颗粒悬浮特性测定的光纤法[J]. , 2011, 11(6): 933-937.
ZHOU Hong-bao LI Xiang-yang YANG Chao MAO Zai-sha ZHANG Guang-ji. An Optic Method Based on LED Reflection for Measurement of the Characteristics of Particle Suspension in a Liquid-Solid Stirred Tank. , 2011, 11(6): 933-937.
2011, Vol. 11 
