ONLINE CONTROL OF SUPERSATURATION IN A CONTINUOUS COOLING KCL CRYSTALLIZER

被引：7

作者：

REDMAN, TP

ROHANI, S

STRATHDEE, G

机构：

[1] UNIV SASKATCHEWAN,DEPT CHEM ENGN,SASKATOON,SK S7N 5C9,CANADA

[2] POTASH CORP SASKATCHEWAN,SASKATOON,SK S7K 7G3,CANADA

来源：

CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 1995年 / 73卷 / 05期

关键词：

SUPERSATURATION CONTROL; KCL CRYSTALLIZATION; CSD; CRYSTAL PURITY;

D O I：

10.1002/cjce.5450730516

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Control of supersaturation in a 1-L continuous cooling KCl crystallizer was investigated. The supersaturation was determined from on-line measurements of the density and temperature of clear liquor samples. A cascade control scheme was used to control the supersaturation through the manipulation of the co-saturated feed temperature set-point while maintaining the crystallizer temperature at 303.2 K. Experimental results showed that due to the suppression of spontaneous nuclearion, a decrease in the measured supersaturation resulted in a 23% increase in the mean crystal size and a 12% decrease in the amount of NaCl impurity in the KCl crystals..

引用

页码：725 / 733

页数：9

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