铁碳微电解法净化焦化放空塔含油废水技术研究
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摘要
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。
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.
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.
引文
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