摘要：
丙烯腈生产过程中排放的废水为高浓度剧毒有机废水，采用焚烧等方法处理均不能满足环保要求。使用2.0L的超临界水氧化反应器对该废水进行处理实验研究。实验结果表明，当反应温度为650℃，压力为28MPa，氧气过量为理论量的200%，反应时间为180s时，COD最高去除率可达到99.998%。笔者考察了反应温度、压力、时间、氧气浓度以及催化剂等对COD去除率的影响。处理后出水水质中的COD、氢氰酸、色度、pH等指标均达到国家规定的《污水综合排放标准》。
关键词:
超临界水氧化,
丙烯腈,
废水处理,
高浓度有机废水
Abstract:
The wastewater from acrylonitrile production is highly concentrated, virulent and low biodegradable. Treating this kind of wastewater by using 2.0 L supercritical water oxidation reactor has been carried on. The results showthat when the reaction temperature is 650 ℃, the pressure is 28 MPa, oxygen excess is 200%, and the reaction time is 180 s, the highest COD removal rate can be up to 99.998%. The effects of reaction temperature, pressure, time, oxygen concentration and catalyst on the COD removal rate have been examined. The indexes of COD, hydrocyanic acid, chroma, pH value, etc. in the treated effluent water can meet the requirement ofthe national wastewater discharge standard.
Key words:
supercritical water oxidation,
acrylonitrile,
wastewater treatment,
highly concentrated organic wastewater
中图分类号:
蔡毅, 马承愚, 彭英利, 耿鹏印, 田江霞, 俞昌吉. 超临界水氧化法处理丙烯腈剧毒废水的实验研究[J]. 工业水处理, 2006, 26(3): 42-44.
Cai Yi, Ma Chengyu, Peng Yingli, Geng Pengyin, Tian Jiangxia, Yu Changji. Preliminary exploration for the treatment of wastewater from acrylonitrile production by supercritical water oxidation[J]. INDUSTRIAL WATER TREATMENT, 2006, 26(3): 42-44.