摘要
采用超临界水氧化（SCWO）技术在连续蒸发壁式反应器内处理高浓度丙烯酸废水。实验结果表明：SCWO能有效地处理丙烯酸废水，废水COD和TOC去除率分别达到99％左右，且反应时间短；反应温度、反应压力和氧化剂加入量的增加有利于COD和TOC去除率的提高。实验得出的废水处理最佳工艺条件：反应温度693K、反应压力24～26MPa、氧化剂加入量1．0～1．5倍。对反应器出口试样进行色谱-质谱联用分析结果表明，小分子醇、醚类以及CO2和CO是主要的液相产物和气相产物。针对腐蚀和盐沉积问题，提出了预防措施。
Wastewater containing acrylic acid was treated by supercritical water oxidation （SCWO） technology in a continuous transpiring wall reactor. The experimental results show that： The wastewater can be treated effectively in a short reaction time with about 99 % of both the removal rates of COD and TOC; Raising reaction temperature, reaction pressure and oxidant dosage is favourable to increase the removal rates of COD and TOC. The optimum operation conditions are as follows： reaction temperature 693 K, reaction pressure 24 - 26 MPa, oxidant dosage 1.0 - 1.5 times. GC - MS analysis results of the outlet samples indicate that small molecules such as alcohol, ether, CO~ and CO are the main products in liquid phase and gas phase. Aiming at the problems of corrosion and salt deposition, preventive measures are proposed.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第5期413-416,共4页
Environmental Protection of Chemical Industry
关键词
超临界水氧化
蒸发壁式反应器
丙烯酸
废水处理
supercritical water oxidation
transpiring wall reactor
acrylic acid
wastewater treatment
