异氰酸酯生产废水的超临界水氧化降解研究  

Supercritical Water Oxidation for the Destruction of Isocyanate Wastewater

作　　者：李贵贤[1] 何磊[1] 马重华[1] 刘鑫[1] 王天烽[1] 

机构地区：[1]兰州理工大学石油化工学院,兰州730050

出　　处：《武汉理工大学学报》2010年第19期110-114,共5页Journal of Wuhan University of Technology

摘　　要：针对传统处理方法降解异氰酸酯废水化学需氧量(COD)低效的缺点,采用一套简洁实用的超临界流体氧化装置对其进行了氧化降解的实验研究。结果表明,水样在超临界水氧化的条件下COD去除率能够达到96.17%;反应温度、停留时间与反应压力的提高能够显著增大COD去除率;氧化剂选用双氧水(30%),用量控制在5%;在酸性pH条件下加入FeSO4.7H2O作为催化剂有助于有机污染物的氧化降解。该水样在反应温度420℃、反应压力26 MPa、停留时间大于180 s时,COD降解率达到最大值。The conventional treatments are unable to effectively remove the chemical oxygen demand（COD） in high concentration Isocyanate wastewater.A series supercritical fluid oxidation device which is simple and practical has been used for the experimental research of oxidative degradation.The results show that the COD removal rate can reach 96.17% while the wastewater is under conditions of SCWO.Reaction temperature,hold time and reaction pressure＇s increase can significantly stimulate the COD removal rate;H2O2（30%） under the amount of 5% has been selected as the oxidants.Adding FeSO4 ·7H2O as a catalyst with PH value in acidic condition contribute to the degradation of organic pollutants.The wastewater in 420 ℃,26 MPa,and hold time is greater than 180 s;the COD removal rate can reach the maximum value.

关 键 词：异氰酸酯生产废水 超临界水氧化 化学需氧量 去除率 

分 类 号：X131.2[环境科学与工程—环境科学]