摘要
以前期工作所测的甲基异丁基酮-水-苯酚-对苯二酚四元物系液液相平衡数据拟合所得的NRTL模型参数为热力学方法,对煤气化废水的萃取脱酚单元进行流程模拟计算和优化,模拟计算结果表明,在逆流萃取级数n=4,萃取相比R=1∶6的情况下,废水萃取后的总酚质量浓度能控制在400 mg/L以下,与三级错流萃取脱酚实验结果相符合。在此基础上设计的萃取塔,运行后总酚质量浓度为250～350 mg/L。
Using NRTL parameters correlated from the experimental liquid-liquid equilibrium data of MIBK-water- phenol-hydroquinone as thermodynamics properties, the simulation and optimization on phenol extraction process for coal- gasification wastewater are carried out. The calculated results show that at extraction ratio R = 1 ： 6, after four-stage countercurrent extraction, the total phenols in the coal-gasification wastewater can be reduced to below 400 rag/L, which corresponds with the experimental result of three stage crosscurrent extraction. In addition, the operating results of the extraction column designed in this way show that the total phenols in the out-let water is 250 -350 mg/L.
出处
《现代化工》
CAS
CSCD
北大核心
2012年第7期102-104,共3页
Modern Chemical Industry
基金
国家自然科学基金资助项目(21106021)
关键词
煤气化废水
萃取脱酚
模拟计算
NRTL
coal-gasification wastewater
phenol extraction
simulation
NRTL
