对虾带辐射的真空冷冻联合干燥系统的试验研究.pdf

文档介绍：对虾带辐射的真空冷冻联合干燥系统的试验研究

李鑫马国远许树学

(北京工业大学环境与能源工程学院北京 100124)

摘要:设计了一套带辐射的真空冷冻干燥系统试验装置,以对虾为物料,进行了干燥过程试验,分析
研究了干燥过程随辐射温度、真空度、含水率及时间等参数的变化规律。试验结果表明:物料中水份的升
华干燥阶段与解析干燥阶段具有明显的转折点;辐射温度主要影响升华干燥阶段的水份升华速率,对于解
析干燥阶段的水份升华速率只有略微影响,因此较低的辐射温度即能满足解析干燥的要求。
关键词:干燥真空冷冻辐射对虾

EXPERIMENTAL STUDY ON A VACUUM FREEZE-DRYING
WITH RADIATION SYSTEM OF PRAWN
Li Xin Ma Guoyuan Xu Shuxue
(College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124)

Abstract:Designed a vacuum freeze-drying with radiation device, carried out drying process experiments
with the prawn material, Analysis of the variation of drying process with the parameters such as radiation
temperature, vacuum, moisture content and time. The results showed that there is a significant turning point
between the sublimation phase and analysis phase; radiation temperature mainly affects sublimation rate of water
drying stage, the rate of the analysis phase is only slightly affected, so the lower temperature of the radiation that
is able to meet the requirements of analytical drying.
Keywords:Drying Vacuum-freezing Radiation Prawn


1、前言
干燥技术在医药、生物制品、食品等工业领域中得
到了广泛的应用[2-4]。
食品真空冷冻干燥技术是先将预处理后的食
真空冷冻干燥技术作为一门涉及多领域的交
品物料冻结,然后在高真空状态下对物料加热,使
叉学科,虽然在诸多领域都得到了广泛的应用,
物料中的水分不经过液态,而是从固态直接升华为
但是将真空冷冻干燥技术应用于水产品中的却
气态,并将水蒸气排除,从而获得脱水食品的方法。
为数不多,这就预示着水产品的冷