轻污油储罐增设闪蒸系统改造

Additional installation of flashing system on light slurry oil tank

炼油装置开停工或生产异常时排放的轻污油中轻组分含量高,进入轻污油储罐后,由于油品蒸汽压高,导致罐内压力升高,易发生轻污油罐浮顶冲至罐顶、管线移动、油品泄漏等异常情况,一旦遇明火、静电或雷击等火源将引发轻污油储罐着火事故,对安全生产造成很大威胁。因此,需对轻污油储存系统进行改造,在轻污油进入储罐前增设闪蒸系统。轻污油进入闪蒸罐后,经过降压使其中的轻组分闪蒸出来进入低压瓦斯系统,闪蒸后的轻污油通过泵送入轻污油储罐,避免轻污油直接进入轻污油罐引发的油罐超压、轻组分逸出等问题,从而有效防止轻污油储罐压力升高而引发的事故,保障了生产安全。

The light component is high in the blow-down light slurry oil in the start-up and shut-down of the refinery process units or during abnormal operation.When the blow-down oil flows to the light slurry oil tank,the floating roof of the light slurry tank rushes to the head,the pipelines move and oil leakages occur due to the high vapor pressure of oil and rising pressure inside the tank.When meeting ignition sources including fire,lightning and thunder strike,etc,they will trigger fire accident of light oil storage tanks,which will greatly threaten safe operation.To solve this problem,the slurry oil storage system is revamped by addition of a flasher for the light slurry oil before entering the tank.After the light slurry oil flows to the tank,the light components in the light slurry oil will be flashed out by depressurization and then enter into low-pressure gas system.The flashed light slurry oil is pumped to light slurry oil tanks to avoid the problems of overpressure and light component escape after the light slurry oil enters into the tank directly.The accidents caused by highpressure of light slurry oil tank are prevented and safe operation of the refinery is ensured.