超临界水氧化法处理焦化废水的模拟试验  

Simulated Experiment of Supercritical Water Oxidation Processes for Coking-Plant Wastewater Treatment

作　　者：李晶晶[1,2] 董泽琴 张维 

机构地区：[1]贵州省环境科学研究设计院,贵州贵阳550081 [2]贵州师范大学地理与环境科学学院,贵州贵阳550001

出　　处：《净水技术》2013年第5期26-30,共5页Water Purification Technology

基　　金：贵州省优秀青年科技人才培养计划项目(黔科合人字(2009)22号);贵州省高层次人才科研条件特助项目(TZJF-2010-077)

摘　　要：采用连续式超临界水氧化小试装置,在实验室以配制的模拟焦化废水进行试验研究。以过氧化氢作为氧化剂,研究了超临界水氧化反应的温度、压力、氧化剂比例K、反应物初始浓度等参数对废水中污染物去除效果的影响。同时以贵州省某焦化厂的实际焦化废水进行试验,结果表明在温度为450℃、压力为25 MPa、K为1.3、模拟废水原始COD_(Cr)浓度为3 706.5mg/L时,出水COD_(Cr)为53.9 mg/L,COD去除率达98.55%;当温度为500℃、压力为25 MPa、K为2.0时,实际焦化废水硫化物、COD、氨氮去除率分别为99.54%、94.69%、48.16%,氨氮去除率相对较低,其试验参数需进一步优化。The simulated coking wastewater was treated by supercritical water oxidation process in a laboratory bench-scale con- tinuous-flow unit using hydrogen peroxide （H2O2） as an oxidant. Experiments were conducted to investigate the effects of the tempera- ture, pressure, proportion of oxidant K and initial concentration of the reactant on pollutants removal. Simultaneously, the practical coking wastewater from a coking plant in Guizhou province was treated. The results show that when reaction temperature is 450 ~C, re action pressure is 25 MPa, K is 1.3 and initial CODa of simulated coking wastewater is 3 706.5 mg/L, CODer of final effluent is 53.9 mg/L, the removal rate of COD is 98.55 %; When reaction temperature is 500 ~C ,reaction pressure is 25 MPa and K is 2.0, the removal rate of the final sulphide, COD, NH3-N in actual coking wastewater is 99.54 %, 94.69 % and 48.16 %, respectively. The re- moval rate of NH3-N is lower relatively, so further optimization of parameters should be done.

关 键 词：超临界水氧化（SCWO） 焦化废水 模拟试验 化学需氧量（COD） 

分 类 号：TU992.3[建筑科学—市政工程]