环保型清洗剂处理含油污泥研究

Study on Environmental Protection Cleaning Agents for Sludge Treatment

以含油量为21.2%的江汉油田采油厂含油污泥为样品,采用热化学预处理、浮选分离技术处理含油污泥。通过筛选、复配,确定一种清洗效率高、环境友好的含油污泥清洗剂组合,烷基糖苷(APG-0810)、聚乙二醇(PEG-4000)、Na 2SiO 3之比为136(质量比)。最优清洗条件为清洗液浓度为0.01 g/mL、热洗温度70℃、热洗时间20 min、pH值为9、固液比为16、浮选搅拌速度1000 r/min、浮选充气量为0.2 L/min、浮选时间15 min,经过3次清洗,含油污泥除油率达到93.40%,含油污泥残油含量降为1.74%,达到HJ 607—2011《废矿物油回收利用污染控制技术规范》要求。含油污泥清洗前后的原油红外光谱检测表明原油的主要成分没有改变,处理后得到的原油具有较高的回收利用价值。

Taking sludge from Jianghan Oil Production Plant with oil content of 21.2%as the sample,we selected a thermochemical pretreatment coupled flotation separation technology to treat oily sludge.Through screening and compounding,a cleaning agent combination with high cleaning efficiency and environmental friendliness was formed,including the ratio of alkyl glucoside(APG-0810),polyethylene glycol(PEG-4000),and Na 2 SiO 3(mass ratio,136).The optimal cleaning conditions were as follows:the cleaning solution concentration was 0.01 g/mL,the hot washing temperature was 70℃,the hot washing time was 20 min,the pH value was 9,the solid-liquid ratio was 16,the flotation agitation speed was 1000 r/min,the flotation charging capacity was 0.2 L/min,and the flotation time was 15 min.After three times of cleaning,the oil removal rate of the sludge reached 93.40%,and the residual oil content of the sludge decreased to 1.74%,meeting the requirements of HJ 607—2011“Technical Specifications for Pollution Control of Used Mineral Oil Recovery,Recycle and Reuse”.Infrared spectroscopy of crude oil before and after sludge cleaning showed that the main components of crude oil did not change,and the crude oil obtained after treatment had a high recycling value.