(14)--12、机械压榨法和超临界流体萃取法制取油脂.ppt
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1、Chapter 4 Vegetable 0ils Processing and Refinement知识点知识点1 机械压榨法和超临界流体萃取机械压榨法和超临界流体萃取法制取油脂法制取油脂2Hard pressing,or,Mechanical pressing(Hard Screw Pressing)(螺旋压榨)(螺旋压榨)The oldest oil recovery method is hard pressing(压(压榨)榨),where the seed is pressed,usually after various pretreatments to enhance oil rec
2、overy,to squeeze(榨取)(榨取)the oil from the solids known as cake.Hard pressingHard pressing3FIGURE4 Depiction of hard screw pressing.定量料仓定量料仓锤式磨或辊式磨锤式磨或辊式磨蒸炒干燥器蒸炒干燥器螺旋榨油机螺旋榨油机过剩料储料罐过剩料储料罐热交换器热交换器澄油罐澄油罐oilseeds4If proper cooking methods are employed,in conjunction with a well-maintained,modern,screw pre
3、ss,a slow as 3%4%residual oil content can be achieved.Many screw press plants are quite small and do not optimally,if at all,flake,cook,and dry before screw pressing;so as much as 6%10%oil often remains with the cake.Hard pressingHard pressing5A screw press(螺旋压榨机)(螺旋压榨机)(Figure 6)is basically a cont
4、inuous screw auger(螺杆)(螺杆)designed to accept feed material and subject it to gradually increasing pressure,as it is conveyed through the barrel cage(榨膛)(榨膛).The barrel(桶)(桶)is composed of bars(齿)(齿)surrounding the screw(螺杆)(螺杆)and oriented parallel to the screw axis.The bars are separated by spacers
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- 14 12 机械 压榨 临界 流体 萃取 法制 油脂
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