PROCESS OPTIMIZATION OF BRINE PURIFICATION AND EVAPORATION FOR COMBINED CRYSTALLIZATION OF NACL AND NA2SO4 BY MEANS OF MECHANICAL VAPOUR RECOMPRESSION

摘要：

General introductionRaw brines from solution mining process contain not only dissolved Na+ and Cl- but also Mg2+, Ca2+, SO42- and other ions like K+ and Br-. There are three different types of raw brine: 1) low concentration of SO42- and other ions (Colombia, Thailand), 2) medium concentration of SO42- and high concentration of other ions (Europe), 3) high concentration of SO42- (China). The brines are normally treated with NaOH / Na2CO3 or CaO/ CO2/ Na2CO3 to precipitate Ca2+ Mg2+ and SO42-. Most of the brines from Chinese brine wells contain higher concentrations of SO42- and make the process of precipitation of SO42-expensive. Therefore the combined process is used to crystallize not only NaCl but also Na2SO4 in the crystallization plant.

作者: J.-H.Schmidt W.Meierhofer H.Schwaiger

作者单位: SEP Salt and Evaporation Plants Ltd., Winterthur, Switzerland

会议类型: 国际会议

会议名称: 9th International Symposium on Salt(第九届世界盐业大会)

会议地点: 北京

会议语种:英文

页码: 27-41

在线出版日期: 2009-09-05（万方平台首次上网日期，不代表论文的发表时间）