化学沉淀与高级氧化法处理乙烯裂解废碱液的研究  

Study on the Treatment of Waste Alkali in Ethylene Cracking by Chemical Precipitation-Advanced Oxidation Process

作　　者：余政哲[1] 孙德智[1] 史鹏飞[1] 李长海[1] 段晓东[1] 

机构地区：[1]哈尔滨工业大学环境科学与工程系,黑龙江哈尔滨150001

出　　处：《化工环保》2004年第2期90-94,共5页Environmental Protection of Chemical Industry

摘　　要：采用化学沉淀与高级氧化 (UV/H2 O2 )法去除乙烯裂解废碱液中的硫化物及有机物。考察了影响效果的各种因素。试验结果表明 :化学沉淀在反应温度为 2 0℃、反应时间为 30min、CuO与Na2 S的摩尔比为 1 4 5∶1;高级氧化反应温度为 4 0℃、反应时间为 12 0min、H2 O2的加入量 (H2 O2 /COD质量比 )为 0 8的条件下 ,废碱液中S2 -的去除率可达 98%以上 ,COD总去除率可达 87% ,BOD5/COD由处理前的 0 2 1提高至 0 5 4。Chemical precipitation-advanced oxidation process was used to remove sulfide and organics from waste alkali in ethylene cracking.The factors affecting removing efficiency were investigated.The experimental results show that the removal rates of S^(2-) and COD are over 98% and 87% respectively at precipitating reaction temperature 20 ℃,reaction time 30 min,CuO/Na_2S(mol/mol)1.45∶1,and advanced oxidation time 120 min,temperature 40 ℃,H_2O_2/COD 0.8.The BOD_5/COD ratio of treated waste alkali is increased from 0.21 to 0.54.

关 键 词：乙烯裂解 废碱液 化学沉淀 高级氧化 硫化物 

分 类 号：X703.1[环境科学与工程—环境工程]