Design of Steam-Stripping Columns for Removal of Volatile Organic Compounds from Water Using Random and Structured Packings

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• 作者：J. R. Ortiz-Del Castillo ; G. Guerrero-Medina ; J. Lopez-Toledo ; and J. A. Rocha
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2000
• 出版时间：March 2000
• 年：2000
• 卷：39
• 期：3
• 页码：731 - 739
• 全文大小：101K
• 年卷期：v.39,no.3(March 2000)
• ISSN：1520-5045

文摘

Mass-transfer data at different feed and steam rates, using structured and random packings,have been collected to develop a model for the design or analysis of packed columns for strippingof volatile organic compounds (VOCs) from water. The steam-stripping experiments wereconducted in a stainless steel column of 0.245-m internal diameter, with 2.8 m of packed section.The packings used were Sulzer BX gauze structured packing, Mellapak 250Y structured packing,1-in. Flexirings, and 1-in. Fleximax random packing. The VOCs were chloroform (CH₃Cl) andtoluene (C₇H₈). The model considers the simultaneous occurrence of mass transfer and hydraulicphenomena with the same expressions for liquid and vapor mass-transfer coefficients and thesame expression for effective interfacial area with one constant for each packing. The averagedeviation for the measured and calculated volumetric mass-transfer coefficient and effectiveheight of packing is 0.29 and 0.23, respectively.