高温煤焦油黏温特性的测定与分析

为了解决焦炉荒煤气在换热管道表面结焦后焦油堵塞问题,采用高温高压黏度仪对高温煤焦油的黏度进行了实验研究。获得了黏温特性曲线和回归方程,并与褐煤油煤浆的黏温特性曲线进行了对比分析。结果表明:温度是影响高温煤焦油黏度变化的主要因素,黏度与温度之间呈指数关系;高温煤焦油的黏度随温度的升高而下降,当温度低于200℃时,温度对高温煤焦油的黏度影响较大,黏度随温度的升高而快速下降,当温度高于200℃时,温度对高温煤焦油的黏度影响较小,黏度随温度的升高基本保持不变;高温煤焦油与褐煤油煤浆的黏温特性曲线随温度的升高具有相同的变化趋势,但在整个温度范围内高温煤焦油的黏温性质明显优于褐煤油煤浆的黏温性质。

Measuring and analyzing on viscosity-temperature characteristic of high temperature coal tar

To prevent coal tar blocking caused by coke oven gas coked on the surface of heat exchange pipe，the high temperature coal tar viscosity under high temperature condition was studied using the high temperature and high pressure viscometer.The viscosity-temperature characteristic curve and regression equation was obtained and compared with the viscosity-temperature characteristic curve of Lignite oil coal slurry，which provided the theoretical basis for studying the high temperature coal tar viscosity under different temperature condition.The results show that temperature is the main factors affecting high temperature coal tar viscosity，there is a exponential relationship between viscosity and temperature；The high temperature coal tar viscosity declines with the increasing of temperature，when the temperature is below 200 ℃，the temperature has a major effect on viscosity and the viscosity declines quickly，when the temperature is above 200 ℃，the temperature has little effect on viscosity and the viscosity almost remain unchanged；The viscosity-temperature characteristic curves of high temperature coal tar and lignite coal oil slurry have the same trend with temperature increasing，the high temperature coal tar viscosity-temperature characteristic is superior to Lignite coal oil slurry in the whole temperature range.