摘要
粉料的流动性对于混合、输送、分装等工业化生产关键工序有重要影响。为解决高纯度低聚果糖(Purified Frocto-oligosaccharide,P-FOS)干粉生产中的流动性问题,研究了不同粒径及其占比对P-FOS干粉流动性的影响。采用粉体流动测试仪分析物料的流动特性,基于不同粒径(180~250、150~180、120~150和<120μm)设计混料试验,并以粒径为自变量,粉体流动指数(ff)为响应值进行回归建模。结果表明,不同粒径的干粉中低聚果糖含量无显著差异(P>0.05)。随着粒径的减小,P-FOS干粉的流动性能变差。不同粒径的P-FOS干粉流动性处于不同区域,粒径180~250、150~180、120~150μm的流动指数分别为12.5、7.7和6.6,流动特性处于容易流动区域;粒径109~120、96~109μm的流动指数分别为2.9和3.3,流动特性处于粘结区域。粒径与流动指数(ff)的关系符合二次回归模型,R2(调整)可达99.43%。已知粒径分布,通过该模型可以预测、进而调控P-FOS粉体的流动性,从而为干粉输送分装的连续性和稳定性提供保障。
The fluidity of powder has an important impact on the key production processes such as mixing,conveying and packaging.To solve the fluidity problem in the production of purified frocto-oligosaccharide(P-FOS)powder,the influence of different particle sizes and their proportions on the fluidity of P-FOS powder was investigated.The flow characteristic of P-FOS was analyzed by using the powder rheometer.Research on the mixing experiment based on the different particle sizes(180~250,150~180,120~150,and<120μm).Then,the regression model was carried out using particle size as an independent variable and the powder flow index ff as an dependent variable.The results showed that there was no significant difference in the content of frocto-oligosaccharide with different particle sizes(P>0.05),but the fluidity of P-FOS dry powder with the reduction of particle size.P-FOS dry powders with different particle sizes exhibit fluidity across different regions.The flow indices of samples with particle sizes in the range of 180~250,150~180 and 120~150μm were 12.5,7.7,and 6.6,respectively.Their flow features were in the zone of easy flow area.Meanwhile,the flow indices of samples with particle sizes of 109~120 and 96~109μm were 2.9 and 3.3,respectively.Their flow characteristics were in the bonding region.The mixing ratio of particles of different particle sizes had a significant influence on fluidity.The relationship between the particle size and the flow index was consistent with the square regression model,and the R2(adjusted)could reach to 99.43%.If the particle size distribution was known,the fluidity of the P-FOS powder could be predicted and regulated by this model,thus guaranteeing the continuity and stability of the transport and packing of the dry powder.
作者
周爽利
阮征
韦建明
李晓敏
ZHOU Shuangli;RUAN Zheng;WEI Jianming;LI Xiaomin(Perfect(Guangdong)Co.,Ltd.,Zhongshan 528400,China;School of Food Science and Engineering,South China University of Technology,Guangzhou 510640,China;China Guangdong Key Laboratory of Green Processing and Product Safety of Natural Products,Guangzhou 510640,China)
出处
《食品工业科技》
CAS
北大核心
2023年第20期53-60,共8页
Science and Technology of Food Industry
基金
国家重点研发计划项目(2017YFD0400400)
广东省重点领域研发计划(2019B020212002)。
关键词
低聚果糖
粉体流动性
粒径
混料设计
流动指数
frocto-oligosaccharide
powder fluidity
particle size
mixture design
flow index
