大曲的热风干燥特性及其动力学模型  

Study on Hot-air Drying Characteristics and Dynamic Model of Daqu

作　　者：夏玙 罗惠波[1,2] 周平 黄丹[1] 邓波[4,5] 沈才萍 邬捷峰[4] 张曼[1] XIA Yu1, LUO Hui-bo1,2, ZHOU Ping3, HUANG Dan1, DENG Bo4,5, SHEN Cai-ping4, WU Jie-feng4, ZHANG Man1(1.College of Bioengineering, Sichuan University of Science ＆ Engineering, Zigong 643000, China;2.Liquor Making Bio-Technology ＆ Application of Key Laboratory of Sichuan Province, Zigong 643000, China;3.Jingjiu Co.Ltd, Huangshi 435100, China;4.Luzhou Laojiao Co., Ltd., Luzhou 646000, China;5.National Engineering Research Center of Solid-state Brewing, Luzhou 646000, Chin)

机构地区：[1]四川理工学院生物工程学院,四川自贡643000 [2]酿酒生物技术及应用四川省重点实验室,四川自贡643000 [3]劲牌有限公司,湖北黄石435100 [4]泸州老窖股份有限公司,四川泸州646000 [5]国家固态酿造工程技术研究中心,四川泸州646000

出　　处：《现代食品科技》2018年第4期206-214,共9页Modern Food Science and Technology

基　　金：固态酿造关键技术研究四川省院士(专家)工作站项目(GY2014-03);四川省科技成果转化项目(2016CC0032)

摘　　要：通过探究温度和风速对大曲热风干燥特性、水分有效扩散系数Deff以及活化能Ea,以建立排潮降温期大曲的热风干燥动力学模型,并探究热风干燥与曲虫致死情况的相关性。结果表明,大曲干燥阶段主要是降速干燥阶段。干燥温度对水分有效扩散效果要明显大于干燥风速,说明干燥过程中温度对大曲脱水影响较大;大曲热风干燥活化能Ea为59.744 k J/mol。选取8种典型干燥模型方程分别描述排潮降温期大曲的干燥曲线,Midilli模型具有更优越的拟合效果,拟合精度高,且经过热风干燥后干燥环境和大曲内部的曲虫能够完全死亡。因此,本文研究外源加热的曲药干燥工艺,在排湿的同时对曲虫进行有效的杀灭,为大曲热风干燥工艺的研究和生产控制提供理论依据。The hot-air drying dynamics model of Daqu during the period of drainage and cooling was established in this study to explore the correlation between hot-air drying and the lethality of Daqu pest by investigating the hot-air drying characteristics, the effective diffusion coefficient（Deff） and the activation energy（Ea） of Daqu. The results demonstrated that the drying stage of Daqu was mainly the deceleration-drying stage. The effect of drying temperature on Deff was obviously greater than the drying air speed, indicating the temperature had a great influence on the dehydration of Daqu, and the Ea was 59.744 k J/mol. In addition, eight typical drying model equations were selected to describe the drying curve of Daqu during the desiccation-cooling period. The Midilli model had superior fitting effect and high fitting accuracy, and the Daqu pests in external and internal environment would completely die after hot-air drying process. Therefore, the paper investigated the drying technology of Daqu with external heating process, and the Daqu pests were effectively exterminated. The obtained results provided a theoretical basis for research and production control of hot-air drying process of Daqu.

关 键 词：大曲 曲虫 热风干燥 动力学 模型 

分 类 号：TS261.11[轻工技术与工程—发酵工程]