摘要
为评价一种新型高效脱酚萃取剂甲基正丁基甲酮(MBK)在溶剂回收阶段的能耗,借助流程模拟软件,对MBK萃取废水后萃取相和萃余相两部分溶剂的回收过程进行了模拟研究。结果显示,溶剂回收塔理论塔板数为22块,进料板为第14块,回流比0.291 4,粗酚中残留的溶剂质量分数可降低到0.1%,回收的溶剂中酚质量分数降低到0.005%。溶剂汽提塔理论塔板数为5块,废水中残留溶剂质量分数可降低到0.005%。当废水处理量为100 t/h时,用MBK萃取比用甲基异丁基甲酮节省循环冷却水93 t/h,节省中压蒸汽682 kg/h,节省低压蒸汽309kg/h。模拟计算数据可为MBK溶剂回收的工业化应用提供参考。
This paper uses the process simulation software to study the solvent recovery process of extraction phase and raffinate phase after methyl n-butyl ketone（MBK）extraction of wastewater, so as to evaluate the energy consumption of a new type effective phenol removal extractant-MBK during the solvent recovery. The simulation results show that the theoretical number of trays in solvent recovery column is 22 and the feed tray is the 14 th, with the reflux ratio of 0.291 4. Solvent residues in crude phenols are reduced to 0.1% and phenol concentration in the recovered solvent is reduced to 0.005%. For solvent stripping column, the theoretical number of trays is 5, and solvent residues in wastewater are reduced to 0.005%. The utility calculation results show that 93 t/h of cooling water, 682 kg/h of medium-pressure steam and 309 kg/h of low-pressure steam will be saved when MBK is used as the extracting solvent to treat 100 t/h wastewater instead of methyl isobutyl ketone. These results can provide references for the industrialization of solvent recovery with MBK.
出处
《煤化工》
CAS
2016年第1期23-26,74,共5页
Coal Chemical Industry
基金
国家自然科学基金项目(20906028)
广州市珠江科技新星计划项目(2011J2200056)
中央高校基本科研重点基金(2014ZZ00570)
关键词
煤化工
含酚废水
甲基正丁基甲酮
萃取
溶剂回收
过程模拟
coal chemical industry
phenolic wastewater
methyl n-butyl ketone
extraction
solvent recovery
process simulation
