采用"热碱洗-沉降-电催化-分离-压滤-干化"组合工艺设计了处理能力为200 L/h的炼化污水场含油污泥处理中试装置,30 d的现场连续运行实验结果表明,在碱洗pH 10、温度70℃、电催化反应初始氯离子质量浓度9 g/L、电解电流密度400 A/m²时,油泥干基含油率从处理前的27.22%降低至处理后的7.43%;油泥残渣经压滤和干化,含水率从处理前的98%降低至处理后的22.9%,油泥体积减量率达到97.59%;处理综合成本较当前装置降低52.5元/t油泥,环境效益和经济效益显著。

It is of great significance to help refinery to solve the problems such as poor treatment effect and high cost in treating with oily sludge.Using the combined process of "thermokalite washing-sedimentation-electrocatalysis-separation-pressure filtration-drying",a 200 L·h^-1 pilot plant for dealing with oily sludge from wastewater treatment plant in refinery is designed.It is shown through a 30-day spot continuous operation experiment that the dry mud oil content of oily sludge can be reduced from 27.22% to 7.43% when the alkaline washing pH is 10,the alkaline washing temperature is at 70℃,the initial chloride ion concentration is 9 g·L^-1 and the current density is 400 A·m^-2.After pressure filtration and drying treatment,the water content of sludge residue decreases from 98% to 22.9%,and the volume reduction rate of sludge reaches 97.59%.Compared with the current unit,the comprehensive treatment cost declines by CNY 52.5 per ton sludge,showing a remarkable environmental and economic benefit.

宋志敏(1987-),男,本科,工程师,研究方向为炼油水处理,songzhm.zjdx@sinopec.com