热敏性物质的载体干燥

    Carrier drying of thermosensitive materials

    • 摘要: 热力干燥方法被广泛应用在生物制品的脱水过程,但生物制品在高温和高湿的作用下,可能会引起产品品质的严重破坏,为了降低干燥过程对其质量的破坏,采用一种新的干燥技术,即吸湿性的多孔介质作为载体干燥方法。详细地讨论了生物制品多孔载体干燥过程中的干燥动力学、质量降解动力学、及质量保护参数等。在实验室振动流化床干燥器上进行正交实验,提出了影响品质保持的过程参数。试验结果分析表明:采用多孔载体方法干燥,产品的最终品质与常规热力干燥后的品质有了显著的改善。

       

      Abstract: The widely applied method for the dehydration of bio-products is thermal drying. However, owing to high thermo- and xero-liability of biomaterials, the drying process may cause serious damage to the product quality. To minimize the losses of the product quality, drying of biomass with porous carriers was applied. A set of orthogonal experiments were carried out in a laboratory vibro-fluidized bed dryer, and the effect of process parameters on quality retention is also presented. Analysis of the experimental results shows a substantial improvement, compared with that of thermal drying, in the final quality of products in the presence of a porous carrier.

       

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