优化后的油煤浆常温常压流变特性的研究

STUDY ON RHEOLOGICAL PROPERTIES OF OPTIMIZING COAL OIL MIXTURE AT NORMAL TEMPERATURE AND ATMOSPHERE

油煤浆的黏度变化是煤直接液化工艺设计的重要参数之一.实验配制油煤浆的溶剂为催化裂化(FCC)油浆(或回炼油)与循环溶剂的掺混体,与传统的循环溶剂差异较大.研究了常温常压条件下各因素对这类油煤浆黏度的影响规律,得到油煤浆浓度为45%和50%条件下FCC油浆(或回炼油)掺混体系满足液化输送的配制条件.分析了FCC油浆(或回炼油)的掺混比、油煤浆浓度、温度对油煤浆黏度的影响规律,结果表明,煤浆的黏度随溶剂黏度的增大而增大,随油煤浆浓度增大而升高.温度对浆体的黏度影响较大,黏度随温度升高而降低,通过对实验数据的数学回归,建立了一定温度范围内黏度随温度变化的定量关系式.

Viscosity of coal oil mixture（COM） is one of an important technological parameters during coal direct liquefaction. In this paper,FCC slurry（recycle oil） and recycle solvent mixture different from traditional recycle solvent were chosen for COM preparation. Some influencing factors for viscosi- ty change of COM were studied at normal temperature and atmosphere, which includes the ratio of FCC slurry（recycle oil） to recycle solvent, COM concentration and temperature. Suitable transportation conditions for FCC slurry（recycle oil） mixing systems during liquefaction were a- chieved under the COM concentration of 45% and 50% respectively. The results show that vis- cosity of COM increases with solvent viscosity and the COM concentration increasing. Apparent viscosity decreases with temperature increasing,and the relation equation of viscosity-temperature was established by analysis and regression of experimental data.