清罐含油污泥热洗收油技术研究

Study on hot washing oil recovery technology of oily sludgefrom tank cleaning

本文针对目前油田含油污泥热洗收油效率普遍低的现象进行研究,分析了含油污泥在热洗过程中提高收油率和降低残渣含油率的主要影响因素,主要为泥水比、体系pH、热洗温度、加药浓度、加热搅拌时间、搅拌速度、离心转速和离心时间。确定了最佳处理条件:泥水比为1:2,体系pH为8,热洗温度为60℃,破乳剂加量为0.06%,清洗剂加量为0.04%,絮凝剂加量为120 mg/L,搅拌时间1 h,搅拌速度160 r/min,离心机转速2400 r/min,离心时间5 min。通过以上运行条件,最终油回收率为95%以上,残渣含油率降低至5%以下,油中含水率低于0.5%,水中含油低于100 mg/L,使含油污泥真正达到了减量化的目的。

This article in view of the present hot wash oilfield oil sludge oil recovery efficiency is generally low,analyzed the oily sludge in the process of thermal washing enhance oil recovery rate and reduce residual oil content of main influence factors,mainly for the mud-water ratio,system of pH,hot wash heating temperature,concentration of dosing,mixing time,stirring speed,the centrifugal rotational speed and centrifugal time.The optimum treatment conditions were determined as follows,the mud-water ratio was 1:2,the system pH was 8,the hot washing temperature was 60℃,the addition of demulsifier was 0.06%,the addition of cleaning agent was 0.04%,the addition of flocculant was 120 mg/L,the stirring time was 1 h,the stirring speed was 160 r/min,the centrifuge speed was 2400 r/min,and the centrifugation time was 5 min.Through the above operating conditions,the final oil recovery rate is more than 95%, the residue oil rate is reduced to below 5%, the moisture content in the oil is less than 0.5%, the oil content in the water is less than 100 mg/L, so that the purpose of reducing oily sludge is really achieved.