油料冷态压榨过程中油脂流速模型  

Fluid Velocity Model for Oil in Oilseeds Processing by Cylinder Press

作　　者：刘汝宽[1,2] 杨星星[3] 肖志红[1] 李昌珠[1] 黄志辉[3] 叶红齐[2] 

机构地区：[1]湖南省林业科学院,长沙410004 [2]中南大学化学化工学院,长沙410083 [3]中南大学机电工程学院,长沙410083

出　　处：《中国粮油学报》2016年第5期96-99,共4页Journal of the Chinese Cereals and Oils Association

基　　金：国家林业局林业公益性行业专项(201304608);湖南省科技计划(2013NK3059)

摘　　要：油料直筒式压榨制油时,始终与榨筒相互作用,同时受到轴向挤压和侧向限制产生破裂,直至其细胞中的油脂逐渐被挤压出来,油料被压实形成饼。针对该制油过程,通过简化假设建立了一维压榨模型,并对油料微元进行受力分析;利用固结理论,分析了油料高度及压榨系数对孔隙流体压力的影响,建立了压榨过程中流体流速模型。结果表明:压榨过程中同一时刻的流速取决于保压压力σ_0、压缩系数α_v和压榨系数C_v;同时,一定范围内保压时间越长,收集的油脂总量越多。Oilseeds are squeezed and ruptured under the interaction with the barrel by the axial compression and lateral limit. Oils in the cells are gradually squeezed out only leaving the cake inside the cylinder barrel. In the cold processing by cylinder press,stress analysis of oilseed was carried out by one- dimensional pressing model which was established through simplifying assumptions; based on consolidation theory,the impact of oilseeds height and coefficient of pore on fluid pressure was analyzed,and the fluid velocity model for squeezing process was founded. The results show that velocity depends on the packing pressure σ_0,compression coefficient α_vand the coefficient of consolidation C_0. Within a certain range,the longer pressure was held,the more total oil was collected.

关 键 词：固结理论 油料 流速模型 

分 类 号：TQ641[化学工程—精细化工]