对颗粒饲料真空后喷涂液体维生素的试验研究  

Technology for spraying liquid vitamin to pellet feed under vacuum condition

作　　者：翟洪玲[1] 王红英[1] 薛松堂[1] 王继承[1] 

机构地区：[1]中国农业大学工学院,北京100083

出　　处：《农业工程学报》2005年第12期89-92,共4页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家"十五"科技攻关资助项目(2002BA514A-13-2-7)

摘　　要：为了在颗粒饲料加工过程中降低维生素的损失,采用真空后喷涂技术,以维生素C为例,进行了真空后喷涂维生素C活性保存率试验、颗粒间均匀性试验和颗粒内外均匀性试验。试验结果表明:真空后喷涂技术和装置可以显著提高维生素的活性保存率;颗粒间均匀性主要与混合时间有关;颗粒内外均匀性主要与真空度、添加剂量和颗粒直径有关。在试验条件下,当混合时间6 m in、颗粒直径Φ2 cm、喷涂压力0.4 M Pa时,颗粒间均匀性达最优;当颗粒直径Φ2 cm、添加剂量4%、真空释放时间160 s时,颗粒内外均匀性达最优。In order to reduce vitamin loss during the manufacture of compound feeds, a series of experiments taking vitamin C as an example were carried out based on vacuum infusion technology. The experiments included the rate of vitamin C active preservation experiment, the uniformity of coating experiment and the homogeneity between the inner portion and outer portion of pellet experiment. The result indicated that the rate of active preservation increased greatly by liquid coating, the uniformity of coating is mainly decided by the mixing time, the homogeneity is mainly decided by the vacuum degree, the amounts of liquid added, the diameter of pellet. Under the experimental conditions, the optimum parameters of the uniformity of coating were as follows： the mixing time： 6 minutes, the diameter of pellet.Ф2 cm, the spraying pressure： 0.4 MPa; the optimum parameters of the homogeneity between the inner portion and outer portion of pellet were as follows： the diameter of pellet：Ф2 cm, the amounts of liquid added. 4%, the vacuum equalizing time： 160 seconds.

关 键 词：颗粒饲料 维生素 真空喷涂 

分 类 号：S816.7[农业科学—饲料科学]