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| 延迟焦化加热炉炉管焦组成与成因分析 |
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杨军卫1,刘丽颖1,王朔1,莫娅南2,田凌燕3,甄新平3
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(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)
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| 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。 |
| 关键词: 焦化炉 结焦机制 延迟焦化 |
| DOI：10.3969/j.issn.1673-5005.2020.01.021 |
| 分类号::TE 624.3 |
| 文献标识码:A |
| 基金项目: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) |
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| Analysis of coke composition and formation in coking furnace tubes |
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YANG Junwei1, LIU Liying1, WANG Shuo1, MO Yanan2, TIAN Lingyan3, ZHEN Xinping3
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(1.State Key Laboratory of Heavy Oil Processing in China University of Petroleum(East China), Qingdao 266580, China;2.PetroChina Liaoyang Petrochemical Company, Liaoyang 111003, China;3.Refing ＆ Petrochemical Research Institute, PetroChina Karamay Petrochemical Company Limited,Karamay 834000, China)
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| Abstract: |
| 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. |
| Key words: coking furnace coking mechanism delayed coking |
