原油储罐在线清罐实践

Practice of in-service tank cleaning of crude oil tank

原油储罐在油泥淤积后采用人工、机械等方法被动清罐作业存在缺陷,但可利用站内现有储运设备、设施进行在线热油冲刷清除油泥。在西部管道鄯善原油首站开展了在线热油清罐技术探索性试验,4座储罐经冲刷后,沉积物厚度明显降低,远低于将沉积物厚度降至0.5m以下的要求,取得了满意的清罐效果。实践表明:该技术可以大大提高经济效益,单座储罐6年清罐总费用可节省约209.5×104元,同时不会造成含苯、蒽、芘等有害物质的直接排放和环境污染。该技术操作简单、安全环保、效果显著、效益巨大,可实现在线操作,有效防止油泥的堆积和形成,大大提高了有效罐容,为储罐长期、安全、高效运行奠定了基础,亦为我国原油储罐沉积油泥的处理提出了新思路。

Imperfection in oil tank cleaning with human or mechanical method seems distressed issue to deal with in field,while site facilities in hand is effective to in-service jet the dead oil with hot oil of tank. Pilot experiments with the hot oil jetting launched in the ShanShan Initial Pumping Station of West Oil Pipeline. 4 oil tanks hot-oil jetted,and a satisfactory result appeared with a <0.5-m height dead oil. The experience showed that the total costs in tank cleaning for individual oil tank could be saved up to 2.095 million $RMB/yr,not directly discharging benzene,anthracene and pyrene to pollute environment. The practice displayed that the method could be in-service operated to enable it to improve the capacity of tank with the shortcutting,environment-friendly and economic features. On the other hand,this method could be a fundamental laid for a long-term and safe operation of oil tank and a new concept to work with in in-service dead oil cleaning inland.