减压塔填料结焦原因分析及应对措施  

Cause Analysis and Countermeasures of Packing Coking in Vacuum Column

作　　者：张常兴 ZHANG Changxing(SINOPEC Qingdao Refining and Chemical Co.,Ltd.,Qingdao 266555,China)

机构地区：[1]中国石化青岛炼油化工有限责任公司,山东青岛266555

出　　处：《石油化工腐蚀与防护》2021年第1期26-28,共3页Corrosion & Protection In Petrochemical Industry

摘　　要：某炼油厂12 Mt/a常减压蒸馏装置减压塔洗涤段填料局部产生严重结焦。从原料性质、操作参数、异常工况、设备问题和加工负荷等方面分析,结焦原因为:全厂停电、紧急停工导致洗涤油突然中断和填料层局部过热;洗涤油个别喷头堵塞,导致局部填料润湿不均匀;劣质原油及重污油掺炼比例提高和减压塔加工负荷的增大加剧了洗涤段结焦。提出了控制劣质原油及重污油掺炼比例、优化操作参数、设备和工艺技术改造等措施。Serious coking occurred at the packing in the washing section of the vacuum distillation column in 12 Mt/a atmospheric and vacuum distillation unit at an oil refinery.The coking causes were analyzed from the aspects of raw material properties,operating parameters,abnormal working conditions,equipment problems and processing load.It was found that the power failure and emergency shutdown of the whole plant led to the sudden interruption of washing oil as well as local overheating of packing layer;the blockage of individual nozzles of washing oil resulted in nonuniform wetting of local fillers;the increase of blending proportion of inferior crude oil and heavy waste oil together with the rise of processing load in vacuum column aggravated the coking of washing section.Some measures were presented such as controlling blending proportion of inferior crude oil and heavy waste oil,optimizing operation parameters,carrying out equipment maintenance and technological transformation.

关 键 词：减压塔 填料 洗涤段 结焦 

分 类 号：TE962[石油与天然气工程—石油机械设备]