[1]展学成,胡旭洲,陈明林,等.重整抽余油加氢装置异常工况催化剂分析及对策[J].石化技术与应用,2023,5:390-394.
ZHAN Xue-cheng,HU Xu-zhou,CHEN Ming-lin,et al.Analysis and countermeasures of catalyst under abnormal operating conditions in reforming residual oil hydrogenation unit[J].Petrochemical technology & application,2023,5:390-394.
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重整抽余油加氢装置异常工况催化剂分析及对策(PDF)
《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]
- 期数:
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2023年5期
- 页码:
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390-394
- 栏目:
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- 出版日期:
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2023-09-10
文章信息/Info
- Title:
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Analysis and countermeasures of catalyst under abnormal operating conditions in reforming residual oil hydrogenation unit
- 文章编号:
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1009-0045(2023)05-0390-05
- 作者:
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展学成1; 胡旭洲2; 陈明林1; 郭大江1; 马萍1; 马好文1*
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(1.中国石油石油化工研究院 兰州化工研究中心,甘肃 兰州 730060;2.中国石油兰州石化公司 乙烯运行二部,甘肃 兰州 730060)
- Author(s):
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ZHAN Xue-cheng1; HU Xu-zhou2; CHEN Ming-lin1; GUO Da-jiang1; MA Ping1; MA Hao-wen1
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(1. Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China; 2.No.2 Department of Ethylene Operation, Lanzhou Petrochemical Company, PetroChina, Lanzhou 730060, China)
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- 关键词:
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重整抽余油加氢; 镍基催化剂; 床层飞温; 床层压差; 苯
- Keywords:
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reforming residual oil hydrogenation; nickel-based catalyst; bed temperature runaway; bed pressure drop; benzene
- 分类号:
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TE 624.4+2;TE 665.6
- DOI:
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DOI:10.19909/j.cnki.ISSN1009-0045.2023.05.0390
- 文献标识码:
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B
- 摘要:
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分析了某120万t/a重整抽余油加氢装置紧急停车原因,利用H2-程序升温还原、X射线衍射、N2物理吸附等分析方法,表征了卸出催化剂的性质,并采取了相应对策。结果表明:由于加氢原料中不饱和烃含量严重超标,引起反应放热量剧增,高温条件下又引发了不饱和烃的聚合、生焦,释放热量叠加,发生了床层飞温,以及结焦使床层堵塞、压差快速上升;在卸出催化剂前的通空气钝化过程中,催化剂床层底部因堵塞引起空气偏流,局部富氧条件下还原态镍过度氧化以及焦炭燃烧的大量放热,使催化剂经历了700 ℃以上的高温氧化,导致催化剂结块、变色;部分卸出催化剂物化性质与新鲜催化剂较为接近,可以回填继续使用,回填量约占新鲜催化剂首次装填质量的70%。
- Abstract:
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The reasons for the emergency shutdown of a 1.2 Mt/a reforming residual oil hydrogenation unit were analyzed. The properties of the discharged catalyst were investigated by analytical means of H2-temperature-programmed reduction, X-ray diffraction and N2-physical adsorption. The results showed that the unsaturated hydrocarbon content of the hydrogenation feed exceeded the standard seriously, which caused the heat release of reaction to increase sharply. Under high temperature conditions, the unsaturated hydrocarbon polymerization and coke formation occurred, resulting in heat release superposition and then temperature runaway of catalyst bed. The coke caused the bottom of the catalyst bed to block and the pressure drop to rise rapidly. In the process of air passivation before unloading the catalyst, air bias was caused by catalyst bed block, massive heat release from excessive oxidation of reduced nickel under local oxygen-rich conditions and coke combustion made the catalyst undergo high temperature oxidation above 700 ℃, resulting in the catalyst caking and the color change. The physical and chemical properties of a part of discharged catalyst which accounted for about 70% of the initial filling mass of the fresh catalyst were close to the fresh catalyst, and could be backfilled for reusing.
参考文献/References
[1] 孙春水,苏勇,范存良,等.碳五馏分加氢催化剂Ni/Al2O3-SiO2的工业应用试验[J].石油炼制与化工,2011,42(5):14-17.[2] 张利军.炼厂碳四加氢作裂解原料的工艺研究[J].石油化工技术与经济,2014,30(4):48-51.[3] 胡晓丽,马好文,郑云弟,等.C4、C5、C9馏分烯烃加氢饱和催化剂LY-2005[J].石油科技论坛,2017,36(Z 1):170-172.[4] 展学成,杨振波,池亮,等.重整抽余油加氢精制催化剂的性能评价与工业应用[J].石化技术与应用,2022,40(2):78-81.[5] 杨岳洋,江书安,李建军,等.pH对氢氧化铝晶型影响分析[J].无机盐工业,2017,49(11):39-41.[6] 牟应蓉,王晓京.镍催化剂中镍铝尖晶石生成条件考察[J].天然气化工(C 1化学与化工),1990,15(3):26-30.
备注/Memo
- 备注/Memo:
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中国石油天然气股份有限公司资助项目(项目编号:2020 B-2516)。
更新日期/Last Update:
2023-09-10