铁碳微电解法净化焦化放空塔含油废水技术研究

针对焦化放空塔含油废水的特性开展铁碳微电解试验研究,对铁碳微电解工艺参数进行考察优化,再通过水样微电解前后的宏观形貌、微观形貌照片的对比分析以及GC-MS联用分析等,进一步评价微电解对废水的净化处理效果。试验结果表明:在废水初始pH值为6,添加量为800 mL,铁碳填料投加量为1 200 g,即1.5 g/mL废水,曝气量为2 L/min,反应时间为2 h的优化条件下,废水中含油质量浓度低于10 mg/L,除油率大于97%,净化后的废水满足GB 31570—2015《石油炼制工业排放标准》的技术要求,解决了焦化放空塔含油废水处理的难题,实现了含油废水的深度净化处理。

Studies on purification of oily wastewater from coking blowdown drum by iron-carbon micro-electrolysis

Experiments on iron-carbon micro-electrolysis,which based upon the characteristics of the oily wastewater from coker blowdown drum was carried out. The technological parameters of iron-carbon micro-electrolysis were investigated and optimized. Contrastive analysis of macroscopic and microscopic morphology of water samples before and after micro-electrolysis, and GC-MS analysis, etc were given. The effect of micro-electrolysis on wastewater purification is further evaluated. The optimal conditions is obtained, when the initial pH value of the wastewater is 6 and its addition amount was 800 mL, the amount of iron-carbon filler is 1 200 g, i.e,1.5 g/mL wastewater, the aeration amount is 2 L/min, the reaction time is 2 h, the concentration of oil in wastewater is less than 10 mg/L, and the oil removal rate is more than 97%. The purified wastewater meets the technical requirements of(GB 31570-2015) petroleum refining industry discharge standard, solving the difficult problem of treating oily wastewater from coking blowdown drum, and realizing deep purification treatment of oily wastewater.