汾酒地缸发酵系统热过程模式及数值模拟研究

摘要

了解白酒发酵系统的热过程特征与机理对发酵过程温度控制及发酵系统的机械化具有重要意义.通过比较不同季节汾酒发酵过程中酒醅及地缸周边土壤的温度分布,确认了汾酒地缸系统发酵过程生物热产生及扩散传递的方式,确定了地缸中酒醅温度的变化特征及发酵传热的主要机理(热传导),并且探讨了气温对发酵热过程的重要影响.根据研究结果认为发酵过程酒醅温度的变化模式符合白酒发酵的基本特征和要求,白酒的生产和研究应满足之.%In order to understand the characteristics and mechanism of the thermal process of liquor fermentation system,which have great significance to the temperature control of the fermentation process and the mechanization of the fermentation system.The temperature distribution of fermented grains and the soil surrounding the cylinder are compared in different seasons.The process of biological heat generation and diffusion during the Fen liquor fermentation was confirmed.The temperature variation characteristics of fermented grains and heat conduction is the main mode of heat transfer in fermentation is determined.The important influence of temperature on the thermal process of fermentation is discussed.The numerical simulation of the thermal process of the fermentation system has been realized by measuring the thermal physical parameters of the fermentation system and using the finite element method of partial differential equation,which lays a foundation for the detection and control offermentation process.The change pattern of fermented grains temperature in fermentation process is the basic characteristics and re quirements of liquor fermentation,research and production of liquor should meet.