窑街和龙口油页岩酸洗脱灰的影响因素

摘要

In this paper,the experimental process was designed based on orthogonal experiments to study the influence factors of acid treatment de-ashing of the oil shales from Yaojie,Gansu and Longkou,Shandong. At room temperature,the influences of particle size(A),solid-liquid ratio(B), HF density (C) and soaking time (D) were investigated. According to range analysis and variance analysis,the primary and secondary factors were the same for the two kinds of oil shales,A>C>D>B;the optimum conditions were also the same,particle size of 0-0.2mm,solid-liquid ratio of 1∶10 g/mL,HF density of 40%and soaking time of 5h. The two kinds of oil shales could get the best effect of acid treatment de-ashing and pyrolysis rate was remarkably improved with increased porosity under the optimum conditions.%以正交实验为基础，研究了窑街和龙口两种油页岩在酸洗脱灰过程中的影响因素。在室温条件下，考察了油页岩粒度（A）、固液比（B）、HF浓度（C）和浸泡时间（D）4种因素对脱灰的影响，通过极差分析和方差分析得出4种因素对这两种油页岩脱灰的影响次序相同，都为A>C>D>B；最佳脱灰方案也相同，均为粒度0～0.2 mm、固液比1∶10 g/mL、HF质量分数40%、浸泡时间5 h。在此方案下这两种油页岩的脱灰效果最好，脱灰后孔隙率增加，热解速率明显加快。