含油污泥热解及热解油加氢精制研究

采用热解法对油田污泥进行处理,通过热解分析及热解放大试验,考察不同温度下热解油收率的变化,并对热解油进行加氢精制研究。结果表明:随着热解温度升高,产油率降低,热解终温以600℃较为适宜,产油率为38.61%,产气率为6.52%;热解油的残炭、金属含量、硫含量、氮含量以及沥青质含量均较低;在反应温度为420℃、氢分压为12.0 MPa、氢油体积比为800、体积空速为1.0h~(-1)的条件下,热解油经加氢处理后,脱硫率为94.5%,脱氮率为89.4%,氢油馏分收率较高,可作为轻质燃料调合组分,而蜡油馏分及重油馏分可以作为优质的加氢裂化原料,进而获得更多的轻质燃料。

RESEARCH ON PYROLYSIS OF OILY SLUDGE AND PYROLYTIC OIL HYDROTREATING

The pyrolytic oils and gases were obtained from oil sludge pyrolysis process at different temperatures and then hydrotreated in pilot scale and scale-up test. The results of pyrolysis experiment show that the oil yield declines as the reaction temperature increases, the oil and gas yield reaches 38.61% and 6.52% at 600 ℃，respectively with small amount of S, N,CCR, metal and asphaltene in the oil. At the hydrotreating conditions of 420 ℃, 12.0 MPa, hydrogen to oil ratio of 800, and space velocity of 1.0 h-1 , the removal rate of sulfur and nitrogen reaches 94.5% and 89.4%, respectively, with high yield of light oil which can be used as a blending component for fuels, while the heavier fraction can be used as hydrocracking feedstocks.