延迟焦化加热炉炉管焦组成与成因分析  

Analysis of coke composition and formation in coking furnace tubes

作　　者：杨军卫[1] 刘丽颖 王朔 莫娅南[2] 田凌燕 甄新平 YANG Junwei;LIU Liying;WANG Shuo;MO Yanan;TIAN Lingyan;ZHEN Xinping(State Key Laboratory of Heavy Oil Processing in China University of Petroleum(East China),Qingdao 266580,China;PetroChina Liaoyang Petrochemical Company,Liaoyang 111003,China;Refing&Petrochemical Research Institute,PetroChina Karamay Petrochemical Company Limited,Karamay 834000,China)

机构地区：[1]中国石油大学(华东)重质油国家重点实验室,山东青岛266580 [2]中国石油天然气股份有限公司辽阳石化分公司,辽宁辽阳111003 [3]中国石油克拉玛依石化有限责任公司,新疆克拉玛依834000

出　　处：《中国石油大学学报（自然科学版）》2020年第1期180-184,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家青年科学基金项目(21706286);中央高校基本科研业务费专项(17CX02020A)。

摘　　要：采用机械清焦方法,获取某焦化炉在2个不同清焦周期的炉管焦样品,对炉管焦的元素组成、灰分及其金属质量分数进行分析。结果表明:与石油焦相比,炉管焦具有更高的缩合深度,所采集的炉管焦氢碳原子比为0.29~0.32,同装置石油焦氢碳比为0.51;炉管焦硫质量分数达12.3%~13.0%,焦化炉减渣原料通过热反应制备的甲苯不溶物硫质量分数为7.2%,约为减渣硫质量分数的2倍,减渣中的含硫组分具有更高的结焦倾向或促进结焦的作用;炉管焦样品灰分质量分数高达20%,缩合焦炭占炉管焦总重的80%~90%,剩余10%~20%主要为硫化铁及其他金属化合物,灰分中的主要金属元素为铁和钼。The coke samples were obtained from a commercial coking furnace by a mechanical decoking technology at two different coke cleaning cycles. The elemental compositions, ash content, and metal content of collected coke samples were analyzed. The results show that the H/C atom ratio of tube cokes is 0.29 to 0.32., while the H/C atom ratio of petroleum coke in the same unit is 0.51, meaning tube coke has higher condensation. Due to higher coking tendency or coking promotion of the sulfur-containing components in the vaccum residue, the sulfur content of tube cokes ranges from 12.3% to 13.0%. However, the sulfur content of toluene insoluble derived from the same furnace charge is 7.2%, which is twice of the sulfur content in the tube coke. The ash content of collected tube cokes is up to 20%. It is also found that about 80%-90% of the deposits formed due to pyrolytic carbon formation. The remaining 10%-20% of the deposits is mainly iron sulfide and other metal compounds. Iron and molybdenum are the major metallic elements in the ash of tube cokes.

关 键 词：焦化炉 结焦机制 延迟焦化 

分 类 号：TE624.3[石油与天然气工程—油气加工工程]