煤油共炼双组分溶剂油煤浆黏温特性及液化反应性

doi:10.11799/ce202101031

摘要/Abstract

摘要： 煤油共炼技术是煤与劣质油清洁高效利用的重要途径。以循环溶剂、石油基重质油和褐煤为研究对象，考察了油煤浆浓度、溶剂性质、双组分溶剂(循环溶剂和重质油)配比对油煤浆黏温特性的影响，研究了双组分溶剂油煤浆的液化反应性。结果表明，随温度升高，油煤浆黏度迅速降低至较低值|相同条件下，浓度越大，黏度越大。双组分溶剂油煤浆流变特性优于重质油油煤浆|重质油含量越高，黏度反增温度越低，反增幅度越大|重质油含量为30%时，黏度反增温度为240℃，反增幅度最大。在煤油共炼过程，双组分溶剂可以配制更高浓度的油煤浆。双组分溶剂油煤浆煤油共炼过程中存在协同效应，循环溶剂优化了活性氢的传递转移，阻断了结焦过程。当重质油加入量小于等于20%时，可获得更高的油收率和更低的沥青产率。随重质油加入比例增加，产品油馏程升高，双环芳烃和链烷烃含量增大。

关键词: 煤油共炼, 双组分溶剂, 油煤浆, 黏温特性, 液化反应性

Abstract: Coal/oil co-processing technology is an important way for clean and efficient utilization of coal and inferior heavy oil. Taking the recycle solvent, petroleum based heavy oil and lignite as the research objects, the effects of the concentration,solvent properties and ratio of two-component solvent (recycle solvent and heavy oil) on the viscosity-temperature characteristics of the coal-oil slurry were investigated. The liquefaction reactivity of the two-component solvent coal-oil slurry was studied, and the properties of the liquefied products were analyzed. The results show that the viscosity of the coal-oil slurry decreases rapidly to a lower value with the increase of temperature. Under the same conditions, the higher the concentration is, the greater the viscosity is. The viscosity-temperature characteristics of two-component solvent coal-oil slurry are similar to that of heavy oil-coal slurry, and the overall viscosity is lower than that of heavy oil-coal slurry. The higher the heavy oil content, the lower the viscosity rebound temperature and the larger the rebound range. When the heavy oil content is 30%, the viscosity rebound temperature is 240 ℃, and the rebounded range is the largest. Under the same viscosity requirement, the two-component solvent can prepare higher concentration of coal-oil slurry. In the process of coal/oil co-processing, there are synergistic effects, which optimize the transfer process of active hydrogen. When the content of heavy oil is less than or equal to 20%, higher oil yield and lower asphaltene yield can be obtained. With the increase of the proportion of heavy oil, the content of binuclear aromatics and long chain alkanes in the oil increases, and the distillation range increases.

中图分类号:

TQ522

张彦军, 舒歌平, 高山松, 贾梦婷, 王洪学. 煤油共炼双组分溶剂油煤浆黏温特性及液化反应性[J]. 煤炭工程, 2021, 53(1): 148-154.

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