对用于回收柔性塑料的热干燥的评估
Imene Berkane1, Ignacio Aracil1, Andrés Fullana1
1Chemical Process Engineering Institute, University of Alicante, 03690 San Vicente del Raspeig, Alicante, Spain.
Waste management (New York, N.Y.)
|June 8, 2023
概括
干燥柔性塑料片是一种能源密集的回收步骤. 这项研究模拟了对流干燥,发现热传输占主导地位,并确定了用于预测塑料片干燥率的关键方程.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 灵活的塑料废弃物干燥是一种昂贵的,能源密集的回收工业挑战.
- 目前的工业干燥工艺在科学文献中没有得到充分的记录.
- 优化塑料干燥对于开发高效和环保的回收技术至关重要.
研究的目的:
- 研究实验室规模的对流干燥过程中柔性塑料的行为.
- 分析影响干燥的因素,包括速度,湿度,尺寸和厚度.
- 开发和验证用于预测塑料片干燥率的数学模型.
主要方法:
- 在实验室范围内对柔性塑料片进行了对流式干燥实验.
- 利用固定和流体化床系统来研究干燥动态.
- 开发并比较了三个数学模型:动力相关性,热传递和质量传递.
主要成果:
- 热传递被确定为控制塑料片的对流干燥的主要机制.
- 基于传热的数学建模提供了对干燥过程的准确预测.
- 质量转移模型的结果不太准确.
- 三个半经验动力学方程 (王和辛格,对数,三度多项式) 有效地预测了固定和流体化床的干燥速率.
结论:
- 热传递机制对于理解和建模柔性塑料干燥至关重要.
- 使用适当的传热模型和经过验证的动力方程,可以准确预测塑料干燥.
- 这项研究为设计更高效的工业塑料干燥机提供了基础.
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