苹果片红外热风联合干燥特性研究

穆金屏; 周家春; 蒋丽华; 邱勇隽; 赵黎明

doi:10.13386/j.issn1002-0306.2016.07.010

苹果片红外热风联合干燥特性研究

华东理工大学发酵工业分离提取技术研发中心生物反应器工程国家重点实验室

详细信息

作者简介:
穆金屏(1990-),女,硕士,研究方向:食品加工技术,E-mail:mujinping1990@sina.cn。;

周家春(1960-),男,硕士,教授,研究方向:食品加工技术,E-mail:jczhou@ecust.edu.cn。;

赵黎明(1977-),男,博士,教授,研究方向:食品加工技术,E-mail:zhaoliming@ecust.edu.cn。;

中图分类号: TS255.3
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出版历程
- 收稿日期: 2015-12-17

Drying characteristics of infrared radiation combining hot air for apple slices

State Key Laboratory of Bioreactor Engineering,R&D Center of Separation and Extration Technology in Fermentation Industry,East China University of Science and Technology

摘要

摘要: 以苹果为原料,研究不同红外辐射距离和热风温度下苹果片的干燥特性,并对苹果脆片的干燥时间、色泽、硬度、脆度和复水性进行分析。结果表明,在苹果片红外-热风联合干燥过程中,热风温度对干燥时间和脆片品质影响显著;干燥过程为降速干燥,水分有效扩散系数范围在2.92×10^-8⁸.85×10^-8m²/s内,且随热风温度升高而增大;苹果片干燥活化能为75.67 k J/mol。苹果片在红外辐射距离50 mm,辐射功率1500 W,热风温度80℃,风速0.8 m/s的条件下,干燥时间仅162 min,并具有良好的色泽（L*值75.01,a*值8.92、b*值32.97）和质构（硬度1063.66 g,脆度0.531 s）。先红外后热风的联合干燥方式能有效抑制酶活和提高干燥速率,以及改善产品品质。
- 苹果片 /
- 红外-热风联合干燥 /
- 干燥特性 /
- 品质
Abstract: Effect of infrared radition distance and hot air temperature on drying characteristics of apple slices were studied in this paper,and the drying time,color,hardness,crispness and redehydration ratio were analyzed.The results showed that hot air temperature had a significant influence on drying characteristics and drying products quality.The whole drying process present a falling rate period.The effective moisture diffusion coefficient of apple slices was range from 2.92 × 10^-8 to 8.85 × 10^-8m²/ s accroding to Fick's Second Law,and it was increased with hot air temperature increasing.The activation energy was 75.67 k J / mol accrodring to Arrenius equation.Drying time of apple slices was greatly shortened( 162 min) with the best color( L*75.01,a*8.92,b*32.97) and texture( hardness 1063.66 g,crispness 0.531 s) when infrared radiation distence was 50 mm,infrared power was 1500 W,hot air temperature was 80 ℃ and air velocity was 0.8 m / s. Infrared radiation combined hot air drying can inhibit enzyme activition,increase drying rate effectively and improve product quality.
- apple slice /
- infrared radiation /
- hot air drying /
- drying characteristics

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