两段式脱臭塔特性及油脂脱臭工艺条件优化  

Characteristics of Two-stage Deodorizer and Optimization of Oil Deodorization

作　　者：李振岚[1] 陈晓慧[1] 江维 张立国 于殿宇[1] 

机构地区：[1]东北农业大学食品学院,黑龙江哈尔滨150030 [2]哈尔滨工大高新技术产业开发股份有限公司中大植物蛋白分公司,黑龙江哈尔滨150038

出　　处：《食品科学》2011年第14期139-143,共5页Food Science

基　　金：黑龙江省科技攻关计划项目(GA09B401-3);"十一五"国家科技支撑计划重点项目(2009BADB9B08-1)

摘　　要：对板式脱臭塔进行改造,采用外部加热的方式,进行两段式脱臭,将脱色油通过双螺旋加热器加热到170℃,使其进入上段板式塔,经初步汽提后的油引出脱臭塔,进入残压2Torr的双螺旋加热器加热到248℃,然后进入下段板式塔蒸馏。脱臭过程中上段脱臭塔中蒸汽用量为油质量的1%,下段脱臭塔中蒸汽用量为油质量的2%,脱臭时间45min,油在脱臭塔中滞留的时间大大缩短,油脂中反式脂肪酸相对含量仅为1.15%,是一种绿色、节能的新型脱臭设备。In this study, tray type deodorizer was modified by external heating strategy to achieve two-stage deodorization. In this deodorization process, decolorized soybean oil was heated by double-helix heater to the optimal temperature of 170 ℃. After the oil entered the upper section of tray type column, primary gas stripping was carried out. Then, the oil was again transferred to double-helix heater where the residual pressure was set at 2 Torr and heated to 248℃ before distillation in the bottom section of tray type column. Steam amount in the upper section of tray type column represented 1% of total oil weight and in the bottom section 2%, and the total deodorization time was set at 45 min. As a result, oil retention time in deodorizer was largely shortened and the trans-fatty acids content in soybean oil was only 1.15%. Therefore, two-stage deodorizer reveals pollution-free and energy-saving properties.

关 键 词：大豆油 两段式脱臭 残压 反式脂肪酸 

分 类 号：TS224.6[轻工技术与工程—粮食、油脂及植物蛋白工程]