煤与劣质油制备的油煤浆的流变性及溶胀特性

探讨了煤油共炼过程中煤与不同劣质油配制油煤浆的适应性；考察了不同溶胀时间下煤的溶胀度、表观黏度的变化，探讨管道运输温度条件下溶胀对油煤浆流变性的影响。结果表明：以馏出温度高于310 ℃重油为溶剂与白石湖煤制得油煤浆，浆体表现出剪切稀化行为；以减压渣油和高温煤焦油为溶剂制得油煤浆，浆体出现非连续性剪切增稠现象；具有剪切增稠趋势的体系不适用于作为煤油共炼油煤浆制备的溶剂。以馏出温度高于310 ℃重油为溶剂的油煤浆在工况温度（80 ℃）条件下出现溶胀行为，且溶胀后表观黏度增大；在较高温度（不低于90 ℃）条件下溶胀行为对油煤浆的流变性影响不大。

RHEOIOGICAL AND SWELLING CHARACTERISTICS OF COAL-OIL SLURRY PREPARED FROM COAL AND INFERIOR OIL

The adaptability of coal to coal-oil slurry with different inferior oils during the process of coal-oil co-processing was investigated. The swelling degree and apparent viscosity of coal after different swelling time were investigated. The effect of swelling on rheology at pipeline transportation temperature was discussed. The results showed that the coal-oil slurry of the Baishihu coal and the >310℃ heavy oil showed shear thinning behavior; the slurry of vacuum residue and high temperature coal tar revealed non-continuous shear thickening trend; the system with shear thickening trendency were not suitable solvents for preparation of coal-oil slurry. The coal-oil slurry, using heavy oil as solvent, appeared swelling behavior at working temperature (80℃), and the apparent viscosity increased. The swelling behavior of the coal-oil slurry had little effect at a higher temperature (≥90 ℃)on rheological property.