The invention discloses a
group technology for heavy oil upgrading, in which the job steps include: (1) full or
moiety of heavy oil individually or mixed with catalytic clarified oil entering
solvent deasphalting
plant, after the
solvent deasphalting treatment, obtaining a deasphalted oil and a
degreasing asphalt; (2) the
degreasing asphalt obtained by step (1) individually or mixed with another
moiety of heavy oil entering
coking plant for coking treatment, in which the obtained
tar heavy oil returns to
solvent deasphalting
plant or enters heavy oil hydrotreating
plant, or
moiety of
tar heavy oil returns to solvent deasphalting plant and another moiety of
tar heavy oil enters heavy oil hydrotreating plant, catalytic plant or hydrocracking plant; (3) the deasphalted oil obtained by step (1) individually or mixed with vacuum
residual oil, non-pressure
residual oil, pressure-relief
residual oil,
catalytic cycle stock and one or more than one heavy oil of tar heavy oil obtained by step (2) entering heavy oil hydrotreating plant for hydrotreatment, after hydrotreatment, obtaining fractions of benzin
naphtha, plane
kerosene and diesel and hydrogenating heavy oil. The invention can improve the charge-in nature, alleviate the operating condition and prolong the
cycle length of the heavy oil hydrotreating plant, which provides better raw oil for downstream plants including catalytic plant.