混合煤焦油相容性试验研究

Experimental study on compatibility determination method of coal tar

为保障煤焦油悬浮床加氢装置的稳定操作,对应用于原油相容性的光度计法进行改进,提出了适用于测量煤焦油相容性的改进方法。将高温焦油A分别与3种重油按1∶1混合,配制成C(A+>260℃重油)、D(A+>280℃重油)、E(A+>300℃重油)3个混合焦油样品作为研究对象,采用光度计法测量混合焦油样品C、D、E的沥青质初始絮凝点,获取这3种混合焦油样品相容性数据,并对重油切割点对混合焦油相容性的影响进行了讨论,同时考察了一种相容性预测方法——稳定性参数法,对试验结果进行对比和验证。结果显示,2种方法获得的煤焦油相容性结果一致,可用于测定或预测混合煤焦油的相容性。

In order to ensure stability of the suspension bed hydrogenation unit, an improved method for measuring coal tar compatibility was put forward. A high temperature coal tar was mixed with three kinds of heavy oil according to 1 ： 1 respectively to prepare three mixed tar samples ： C （ A＋〉260 ℃ heavy oil）, D（ A＋〉280 ℃ heavy oil） and E（ A＋〉300 ℃ heavy oil）. The initial asphaltene flocculation points of C, D, E were measured by the photometer method, and the compatibility data of the three samples were obtained. The influence of heavy oil cutting points on the compatibility of the samples were discussed. At the same time, the stability parameter method was investigated, and the results were compared and verified. The results show that the compatibility of coal tar obtained by the two methods is consistent ,which can be used to determine or predict the compatibility of coal tars.