烟叶烘烤过程中流水线烤房的空气介质分析

Analysis of air medium in pipelined flue-cured tobacco curing barn during curing process

【目的】了解流水线烤房烘烤介质中温度、相对湿度以及风速的变化,明确各参数之间的影响。【方法】以8隧道30m流水线烤烟烤房为研究对象,测定烘烤过程中的温度、相对湿度和风速。【结果】1)流水线烤房烘烤过程中变黄期时间为40~47h,定色期时间为43~48h,干筋期时间45~52h。2)在烤烟烘烤过程中,流水线烤房的Ⅰ区、Ⅱ区与Ⅵ区4路烟叶的温度无显著性差异,Ⅲ区~Ⅴ区4路烟叶表现为两侧温度大于中间温度;各区段4路烟叶的相对湿度有相对较大差异;整个烘烤过程叶间隙风速的变化趋势比较复杂,总体表现为C路烟叶的叶间隙风速最小,两侧烟叶的风速保持在较高水平;但各路烟的烘烤环境均能满足烘烤需求,且烤后烟的品质差异不大。3)各区段流水线烤房内的风速对温湿度的变化有不同程度影响。4)与普通密集烤房相比,流水线烤房能够提高烟叶品质,降低光滑烟的比例。【结论】流水线烤房能够很好地满足当前烟叶生产的需求,进一步提高烟叶生产的经济效益。

【Objective】This study investigated the environment temperature,humidity and wind changes in the line curing barn and the interactions between parameters.【Method】A 30 mpipeline tunnel drying room was selected to measure temperature,humidity,and wind speed during curing process.【Result】1）In the curing process,yellowing stage was 40-47 h,color fixing time was 43-48 h,and the drying time was 45-52 h.2）There was no significant difference in temperature between the 4 ways of tobacco in Ⅰzone,Ⅱ zone and Ⅵ zone,but the bilateral temperature ofⅢ zone-Ⅴzone was greater than middle temperature.The relative humidity of 4 ways had relatively larger difference while the change of wind speed was complex in the whole curing process.The wind speed between tobacco leaves of C way was the minimum while on sides of leaves was high.The curing environment of all 4 ways could meet the curing requirements,and there was small difference in tobacco quality.3）The wind speed of pipeline curing barn had different influences on temperature and humidity.4）Compared with the ordinary bulk curing barn,the pipelined flue-cured tobacco curing barn could improve tobacco quality,and the proportion of solid and stiff tobacco was decreased.【Conclusion】The pipelined flue-cured tobacco curing barn could meet the demand oftobacco curing,and improve the economic benefit of tobacco production.