原位涂层抑制结焦技术工业应用  

Commercial Application of Anti-coking Technology with In-situ Coating

作　　者：王红霞[1] 王国清[1] 郏景省[1] 王申祥[1] 李玉荣 王吉平[2] 房炳昌[2] 崔立山[3] Wang Hongxia;Wang Guoqing;Jia Jingsheng;Wang Shenxiang;Li Yurong;Wang Jiping;Fang Bingchang;Cui Lishan(Sinopec Beijing Research Institute of Chemical Industry,Beijing 100013,China;Sinopec Qilu Company,Zibo Shandong 255400,China;China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石化北京化工研究院,北京100013 [2]中国石化齐鲁分公司,山东淄博255400 [3]中国石油大学(北京),北京102249

出　　处：《石油石化绿色低碳》2019年第1期55-58,共4页Green Petroleum & Petrochemicals

摘　　要：烃类裂解炉辐射段炉管合金的主要元素为Ni、Fe、Cr和Mn。原位涂层技术将低氧分压下的选择性氧化原理运用到烃类裂解炉管表面处理中,采用特定气氛对工业裂解炉管进行高温氧化处理,在炉管内表面形成具有尖晶石结构的致密MnCr_2O_4氧化膜涂层,可有效覆盖Fe、Ni,降低催化结焦反应发生的几率。文章介绍了原位涂层技术在中国石化齐鲁分公司6万吨/年乙烯装置1-1型BA-102裂解炉及2-1-1-1型BA-104裂解炉上的应用情况。应用结果表明,原位涂层技术抑制裂解炉辐射段炉管结焦效果明显,在裂解原料相同及相似工况条件下,与未采用原位涂层技术前相比,1-1型裂解炉平均运行周期由43天提高到78天;2-1-1-1型裂解炉平均运行周期由47天提高到71天。The main elements in furnace tube alloy in radiant section of hydrocarbon cracking furnace are Ni, Fe, Cr and Mn. In-situ coating technology applies the principle of selective oxidation under low-oxygen partial pressure to hydrocarbon cracking furnace tube surface treatment, which conducts high-temperature oxidation treatment of cracking furnace tubes in specific atmosphere. As a result, a dense MnCr2O4 oxide film coating with spinel structure is formed on the inner surface of the furnace tube. This in-situ coating can effectively cover Fe and Ni, and reduce the probability of catalytic coking reaction. This paper introduces the application of in-situ coating technology on two ethylene furnaces in Sinopec Qilu Company, which both have 60,000 tons/year ethylene capacity and 1-1 /2-1-1-1 furnace tube configuration respectively. The application results show that the in-situ coating technology can effectively inhibit coking in radiant section of cracking furnace. Compared with no in-situ coating, under the same feedstocks and similar working conditions, the average operating cycle has increased from 43 to 78 days for the 1-1 type cracking furnace, and from 47 to 71 days for the 2-1-1-1 type cracking furnace.

关 键 词：乙烯 裂解炉 原位涂层 结焦 

分 类 号：TQ221.211[化学工程—有机化工]