双螺杆挤压过程中物料成分对其停留时间分布影响的研究  

Research on the Effect of Material Component to the Residence Time Distribution of Material During Twin Screw Extrusion Process

作　　者：吕庆云[1] 郭吉[1] 贾喜午 周坚[1] 黄昌郡 

机构地区：[1]武汉轻工大学食品科学与工程学院农产品加工湖北省协同创新中心,武汉430023

出　　处：《中国粮油学报》2016年第5期141-146,151,共7页Journal of the Chinese Cereals and Oils Association

基　　金：国家科技支撑计划(2012BAD37B03);粮食公益性行业科研专项(201313011-5)

摘　　要：为研究双螺杆挤压机生产挤压食品过程中物料成分对停留时间分布的影响,以碳粉为示踪剂,用台式分光测色仪测定添加不同物料成分后各段挤出物的总色差,并对各组样品的停留时间分布进行分析。结果表明:物料成分会影响到原料在挤压机内的停留时间及混合程度,初始MRT为182 s,初始Pe值为19,玉米淀粉添加量为25%时MRT降为173 s,Pe值降为10,大米蛋白、膳食纤维、大豆油添加量分别为15%、10%、6%时,MRT分别延长到214、229、212 s,Pe值分别上升到31、66和29;20组回归正交试验的扩散数模式属于混合流中的中间量扩散模式;各变量对初始物料MRT影响的顺序依次为:大豆油添加量>膳食纤维添加量>大米蛋白添加量>玉米淀粉添加量。In order to research the effect of material with different component to residence time distribution during twin- screw extrusion process,using carbon as a tracer,measured the color of the extrudate with color measurement instrument and the analyzed the residence time distribution of samples in each group. The main results showed that the raw material component will affect the residence time and the degree of mixing. The initial MRT was 182 seconds,the initial Pe value was 19. MRT was reduced to 173 seconds and Pe value was reduced to 10 when the adding of corn starch was 25 percent. The MRT prolonged to 214,229,212 seconds and the Pe value reached to 31,66 and29,respectively when 15 percent of rice protein,10 percent of dietary fiber,6 percent of soybean oil were added respectively. The 20 group of orthogonal regression test belongs to the intermediate volume diffusion model. The sequence of effects of variables to MRT from big to small was the soybean oil,dietary fiber content,rice protein and the corn starch.

关 键 词：双螺杆挤压 停留时间 淀粉 蛋白质 膳食纤维 油脂 

分 类 号：TS213.3[轻工技术与工程—粮食、油脂及植物蛋白工程]