膨化温度对冬枣变温压差膨化干燥特性的影响

为探索冬枣变温压差膨化干燥过程中水分的变化规律,研究了不同膨化温度对冬枣变温压差膨化干燥特性的影响,并建立了变温压差膨化干燥动力学模型.试验结果表明:变温压差膨化干燥过程分为快速干燥、恒速干燥和减速干燥3个阶段,含水率在50％左右时进入恒速干燥阶段,40％后开始减速干燥过程,干燥过程大部分处于降速阶段；不同膨化温度下的...

Effects of puffing temperature on drying characteristics of winter jujube by explosion puffing drying at variable temperature and pressure

In order to investigate the moisture content change theory and obtain the drying kinetics model of winter jujube by explosion puffing drying at variable temperature and pressure difference. Effects of different puffing temperature on drying characteristics of winter jujube by explosion puffing drying at variable temperature and pressure difference were investigated. The drying kinetics model of winter jujube was founded. Results showed that the explosion puffing drying process of winter jujube occurred in rising-rate, constant-rate and falling-rate period. When the moisture content was about 50%, the drying process was in constant-rate constant period. And the drying process was in falling-rate period when the moisture content was 40%. Most of drying process was in falling-rate period. Henderson and Pabis model provided better simulation of drying curves for winter jujube at different puffing drying temperature. This research can predict the relationship between explosion puffing drying time and moisture content change, and provide a technical basis for controllable industrialization production of explosion puffing drying at variable temperature and pressure difference for winter jujube.