Eutectic freeze crystallization: Application to process streams and waste water purification

被引：66

作者：

van der Ham, F ^{[1
]}

Witkamp, GJ ^{[1
]}

de Graauw, J ^{[1
]}

van Rosmalen, GM ^{[1
]}

机构：

[1] Delft Univ Technol, Lab Proc Equipment, NL-2628 CA Delft, Netherlands

来源：

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 1998年 / 37卷 / 02期

关键词：

crystallization; waste streams; freezing; equipment design; eutectic;

D O I：

10.1016/S0255-2701(97)00055-X

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Two case studies are presented using eutectic freeze crystallization (EFC) as an alternative for evaporative crystallization: a 7.8 ton day(-1) 35 w% aqueous sodium nitrate and a 24 ton day(-1) 12 w% copper sulfate stream. The proposed crystallizer is a cooled disk column crystallizer (CDCC), using indirect cooling for heat transfer. in single stage operation, the formed ice crystals are used to pre-cool the feed stream. A two stage refrigeration unit utilizes the formed ice crystals in the condensation of refrigerant. Expressed as a thermal equivalent energy requirement, EFC requires 1282 kJ kg(-1) NaNO3 and 1037 kJ kg(-1) CuSO4 . 5H(2)O. Compared to conventional multi-step evaporation, the energy reductions are 30% for sodium nitrate and 65%, for copper sulfate. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：207 / 213

页数：7