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反渗透膜处理维生素C凝结水的最优工艺条件

Keywords: 反渗透,凝结水,操作条件,影响程度,优化

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Abstract:

针对维生素C生产工艺中产生的凝结水产量大、处理成本高、存储运输困难和营养物质含量偏低等问题,采用反渗透技术对VC凝结水进行处理。实验建立小试规模反渗透膜处理装置,采用无量纲化多元回归分析方法,分析了操作条件指标与渗透水评价指标两套指标体系之间的关系,定量评价了各个操作条件指标对渗透水评价指标的整体影响程度,并在此基础上研究了最佳操作条件的工艺参数。结果表明:建立的无量纲化多元回归分析方法切实有效,在正交实验设计水平范围内,压力、pH和回流比均是多目标系统的影响因子,操作条件指标对渗透水评价指标的整体影响程度大小顺序为:压力>pH>回流比>温度,且各自影响程度所占比例分别为43.02%、29.01%、25.07%和2.89%。各个操作因子对多指标系统的影响是独立的。在只考虑系统收益而不考虑膜污染的情况下,最佳操作条件分别为:温度T=30.65,压力P=1.5MPa,回流比r=0.78,pH=7.475。

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