延迟焦化联合装置污油回炼技术改造方案  

RENOVATION SCHEME OF DIRTY OIL RECOVERY TECHNOLOGY IN DELAYED COKING COMBINED UNIT

作　　者：贾正万 陈进旺 俞欢 Jia Zhengwan;Chen Jinwang;Yu Huan(CNOOC Ningbo Zhoushan Petrochemical Co.,Ltd.,Zhoushan,Zhejiang 316015)

机构地区：[1]中海石油舟山石化有限公司,浙江舟山316015

出　　处：《石油炼制与化工》2024年第3期38-42,共5页Petroleum Processing and Petrochemicals

摘　　要：延迟焦化装置在焦炭塔预热和冷焦工序中产生大量的污油,其中预热初期甩油和冷焦的轻污油因含水量高不能直接回炼。传统工艺中这部分污油主要通过污油罐进行长时间沉降脱水后才能进行回炼,导致处理周期延长、热量损失、环境污染等问题。为了实现这部分污油直接回炼,中海石油舟山石化有限公司对2.4 Mt/a延迟焦化装置的放空系统及污油回炼流程进行改造,增设了热蜡进料、注剂、余热回收和轻重污油直炼流程,实现了污油不需要进入污油罐沉降就能直接回炼的目标,缩短了污油回炼流程,降低装置能耗、减少环境污染。改造后,装置外甩污油量由67 t/d下降至0,取得良好的节能减排效果。A large amount of dirty oil is produced in the preheating and cooling processes of coke drum,among which the light dirty oil during the preheating and cooling stages cannot be directly recycled due to its high water content.In traditional processes,this part of the dirty oil is mainly treated through long-term sedimentation and dehydration in the dirty oil tank before being recycled,resulting in the problems of prolonged treatment cycles,heat loss,and environmental pollution.In order to realize the direct recovery of the dirty oil,CNOOC Ningbo Daxie(Zhoushan)Petrochemical Co.,Ltd.modified the venting system and the recovery process of the 2.4 Mt/a delayed coking unit,adding hot VGO feed,injection agent,waste heat recovery and direct refining process of light and heavy dirty oil.The goal that dirty oil could be directly refined without settling into dirty oil tank was realized,the process of dirty oil recovery was shortened,the energy consumption of the unit was decreased,and the environmental pollution was reduced.After modification,the amount of dirty oil thrown outside the unit decreased from 67 t d to 0,which has achieved good energy-saving and emission reduction effects.

关 键 词：延迟焦化 污油 回炼 破乳剂 

分 类 号：TE96[石油与天然气工程—石油机械设备]