Xu Qian, Zhang Ding, Ma Liang, Zhang Linjing, Zhang Yichen, Song Yingfa, Fang Shenwen
College of Chemistry and Chemical Engineering, Southwest Petroleum University 8 Xindu Avenue, Xindu District Chengdu Sichuan 610500 P. R. China
Quality, Health, Safety and Environmental Protection Department of Zhejiang Oilfield Company Hangzhou Zhejiang China.
RSC Adv. 2024 Jan 18;14(5):3000-3009. doi: 10.1039/d3ra07907d. eCollection 2024 Jan 17.
In this paper, a floatation-advanced oxidation two-step process was proposed for deep oil removal of oil-based drilling cuttings (OBDC). In the first stage, a novel and simple degreasing solution was prepared and most of the base oil contained by OBDC was removed by flotation; in the second stage, the oil content of OBDC was further reduced by combined ultrasound + ozone (US + O) advanced oxidation. The recommended degreasing solution was a mixture of methanol, ammonium chloride, and water with a mass ratio of 1.48.1 : 0.25. The best flotation process was as follows: a mass ratio of OBDC to degreasing solution of 1 : 10, stirring speed of 400 rpm and N flotation with a flow rate of 400 mL min for 60 min. The oil content of OBDC can be reduced from 14.57% to 1.42% after flotation treatment and the degreasing solution can be reused more than five times. The optimal process of US + O advanced oxidation was as follows: a mass ratio of OBDC to water of 1 : 10, ultrasonic power of 1000 W, and an ozone flow rate of 4.0 L min for 100 min. The oil content of OBDC can be reduced from 1.42% to 0.14% after US + O treatment at room temperature. The results of this paper provide a new method and idea for OBDC treatment.
本文提出了一种浮选-高级氧化两步法用于油基钻井岩屑（OBDC）的深度除油。在第一阶段，制备了一种新颖且简单的脱脂溶液，通过浮选去除OBDC中所含的大部分基础油；在第二阶段，通过超声+臭氧（US+O）联合高级氧化进一步降低OBDC的含油量。推荐的脱脂溶液是甲醇、氯化铵和水的混合物，质量比为1.48:1:0.25。最佳浮选工艺如下：OBDC与脱脂溶液的质量比为1:10，搅拌速度为400 rpm，氮气浮选流速为400 mL/min，浮选60 min。浮选处理后，OBDC的含油量可从14.57%降至1.42%，脱脂溶液可重复使用5次以上。US+O高级氧化的最佳工艺如下：OBDC与水的质量比为1:10，超声功率为1000 W，臭氧流速为4.0 L/min，处理100 min。在室温下进行US+O处理后，OBDC的含油量可从1.42%降至0.14%。本文的研究结果为OBDC处理提供了一种新的方法和思路。
