摘要
实验测定了酒醅含湿量、乙醇含量、真实密度、堆积密度、空隙率、堆积角和静摩擦系数在窖池中的分布规律。结果表明,随着窖池深度的增加,含湿量从60.2%升高到71.3%,乙醇含量先升高后降低,表层最低为4.1%,中下层最高为6.4%,底层为5.7%;真实密度、松散堆积密度和振实堆积密度随窖池深度增加而增大,其范围分别为747.5kg/m3μ913.4kg/m3、374.7kg/m3μ443.2kg/m3和529.8kg/m3μ580.6kg/m3;堆积角的变化范围是42.8°μ45.3°,表层最小、中下层最大;酒醅在生铁、玻璃和木板上的静摩擦系数均随窖池深度增加而增加,其范围分别为0.54μ0.58、0.58μ0.66和0.69μ0.85。研究结果为酒醅混合搅拌及输运设备的设计和蒸馏工艺优化提供了重要参考。
The physical properties of fermented grains of Luzhou-flavor liquor in fermentation tank were measured, including the moisture, ethanol content, true density, bulk density, porosity, angle of repose and static friction coefficient. The results showed that as the depth of fermented grains in fermentation tank increased, the moisture increased from 60. 2% to 71.3%, while the ethanol content increased from 4. 1% at the top surface to 6. 4% at the lower-middle and then decreased to 5.7% at the bottom The true density, loose bulk density and shake bulk density also increased with variation ranges of 747. 5kg/m^3 -913.4kg/m^3, 374. 7kg/m^3 - 443. 2kg/m^3 and 529. 8kg/m^3 - 580. 6kg/m^3, respectively. The angle of repose ranged from 42. 8° to 45.3°, of which the minimum was at the top surface and the maximum was at the lower-middle. As the depth increased, the static friction coefficients of fermented grains on plywood, glass and iron increased with variation ranges of 0. 54 - 0. 58, 0. 58 - 0. 66 and 0. 69 - 0. 85, respectively. The results may serve as an important reference for the design of mixer and transporter of fermented grains and the optimization of distillation operation.
出处
《中国酿造》
CAS
北大核心
2011年第5期121-124,共4页
China Brewing
关键词
酒醅
物理性质
含湿量
堆积角
fermented grains
physical property
moisture
angle of repose
