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为提高催化裂化油浆的静电分离效果,对一级静电后的油浆经过改性之后再进行二级静电脱固。通过比较4种添加剂加入后的静电脱固效果,发现介电常数较高、导电率较低的添加剂A最优。经过对加入添加剂后静电分离实验条件的优化,确定了添加剂改性时静电分离的最优实验条件。与不进行改性相比,改性后的脱固效率提高了21%,净化油浆催化剂颗粒含量低于10μg/g。对固体颗粒的介电常数进行测定,利用光学显微观察、能谱分析及红外光谱仪对静电前后油浆中剩余固体颗粒的物理状态及物质组成进行了观察,分析发现向油浆中加入添加剂A之后再进行静电分离,可以使净化油浆中的固体颗粒含量减小,介电常数增加,并且添加剂对油浆中的催化剂颗粒作用比较明显。
In order to improve the electrostatic separation effect of the catalytic cracking slurry, the secondary static electricity is removed after the primary static slurry is modified. By comparing the static removal effect of the four additives, it is found that the additive A with the higher dielectric constant and the lower conductivity is the best. After the optimization of the experimental conditions for the electrostatic separation after adding additives, the optimal experimental conditions for the electrostatic separation during the modification of additives were determined. Compared with no modification, the modified removal efficiency increased by 21% and the content of purified slurry catalyst particles was lower than 10μg / g. The dielectric constants of solid particles were measured. The physical state and material composition of the remaining solid particles in slurry before and after electrostatic discharge were observed by optical microscopy, energy spectrum analysis and infrared spectroscopy. The results showed that adding additive A After electrostatic separation, the content of solid particles in the slurry can be reduced, the dielectric constant increases, and the effect of the additives on the catalyst particles in the slurry is obvious.