Patent ID: 11946003
Assignee: SINOPEC DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 14:
15. The method according to claim 12, wherein:
when the liquid level of the pressure stabilization tower is increased to 60% or more of the total height of the tower and the 95% distillate temperature of the distillate oil is increased to 310° C. or higher, the temperature at which the first stream of bottom oil is returned to the pressure stabilization tower is lowered and the discharge rate of the bottom oil from the pressure stabilization tower is raised;
when the liquid level at the bottom of the pressure stabilization tower is increased to 60% or more of the total height of the tower and the 95% distillate temperature of the distillate oil is decreased to 240° C. or lower, both the temperature at which the first stream of bottom oil is returned to the pressure stabilization tower and the discharge rate of the bottom oil from the pressure stabilization tower are raised;
when the liquid level at the bottom of the pressure stabilization tower is decreased to 20% or less of the total height of the tower and the 95% distillate temperature of the distillate oil is increased to 310° C. or higher, both the temperature at which the first stream of bottom oil is returned to the pressure stabilization tower and the discharge rate of the bottom oil from the pressure stabilization tower are lowered; or
when the liquid level at the bottom of the pressure stabilization tower is decreased to 20% or less of the total height of the tower and the 95% distillate temperature of the distillate oil is decreased to 240° C. or lower, the temperature at which the first stream of bottom oil is returned to the pressure stabilization tower is raised, and the discharge rate of the bottom oil from the pressure stabilization tower is lowered.