摘要
对超临界水氧化技术处理焦化废水进行了试验研究,分别以双氧水、重铬酸钾、高锰酸钾、次氯酸钠为氧化剂,硫酸铜为催化剂,考察了温度、停留时间对焦化废水中CODCr、氨氮的去除效果的影响。试验结果表明,废水中的CODCr、氨氮去除率随着反应温度和停留时间的增大而提高。在相同反应条件下,以双氧水为氧化剂的处理效果优于其它3种氧化剂。试验确定了最适宜工艺条件为:以双氧水为氧化剂,投加量为理论投加量的3倍,硫酸铜为催化剂,反应温度480℃,反应压力24 MPa,反应时间60 s。在此工艺条件下,废水的CODCr去除率达99.5%,氨氮降解率达90%。
With H2O2,K2Cr2O7,KMnO4 and NaClO as oxidant,CuSO4 as catalyst,a test on coking wastewater treatment by supercritical water oxidation process was carried out.The effects of temperature and retention time on CODCr and ammonia nitrogen removal from the coking wastewater was studied.The results of the test showed that,the removal rates of CODCr and ammonia nitrogen increased with the increasing of reaction temperature and retention time.Under the same reaction condition,the efficiency of H2O2 on the said kind of wastewater treatment was superior to that of the other 3 kinds of oxidants.The optimal process condition was determined as： H2O2 and CuSO4 were used as the oxidant and the catalyst respectively,the oxidant dosage was 3 times as much as the theoretical value,the reaction temperature was 480 ℃,the reaction pressure was 24 MPa,and the reaction time was 60 s.Under the above condition,the removal rates of CODCr and ammonia nitrogen reached 99.5% and 90% respectively.
出处
《工业用水与废水》
CAS
2012年第2期22-24,37,共4页
Industrial Water & Wastewater
关键词
超临界水氧化
氧化剂
CODCR
氨氮
焦化废水
supercritical water oxidation
oxidant
CODCr
ammonia nitrogen
coking wastewater
