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两种干燥工艺下叶丝加工质量的对比分析

Comparison of Processing Quality of Cut Strips Dried with Two Different Technologies

  • 摘要: 为探讨叶丝干燥工艺对烟叶加工质量的影响,对叶丝经滚筒干燥和气流干燥处理后物理指标、感官质量、化学成分、烟气指标和7项有害成分的变化情况进行了检测。结果表明:①相对于滚筒干燥,气流干燥处理后叶丝的填充值显著升高、碎丝率显著降低,焦油和一氧化碳量均显著降低,7种有害成分中NNK释放量显著降低,但巴豆醛释放量有明显升高趋势,其他5种有害成分变化趋势不明显;②干燥工艺对感官质量的影响主要表现在香气量和丰满程度上,气流干燥会导致香气量减少、丰满程度降低,且干燥工艺对感官质量的影响在不同产地烟叶上存在较大差异。

     

    Abstract: To investigate the effects of drying means on the processing quality of dried cut strips, the change trends of physical indexes, sensory quality, chemical components, smoke indexes and seven harmful components of cut strips after cylinder drying and pneumatic drying were studied. The results showed that:1) Comparing with cylinder drying, the dried tobacco featured significantly higher filling power, lower proportion of small strands and lower tar and carbon monoxide deliveries by pneumatic drying. Among the seven harmful components, NNK delivery was significantly reduced, while crotonaldehyde delivery was obviously raised by pneumatic drying; and the other five harmful components did not change regularly. 2) The effects of drying means on the sensory quality were mainly reflected in aroma quantity and abundance, which were reduced by pneumatic drying; however, the effects were obviously different among tobacco leaves from different areas.

     

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