蒸汽转化管内壁瘤状物组成与形成机制研究  

Microstructure Analysis of the Tumor on the Inner Wall of A Steam Conversion Tube

作　　者：闫硕 陈海见 徐辽 Olivia Wu 曹铁山[1] 赵杰[1] 程从前[1] Yan Shuo;Chen Haijian;Xu Liao;Oivia Wu;Cao Tieshan;Zhao Jie;Cheng Congqian(School of Materials Science and Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;Yantai Moody Industrial Technology Co.,Ltd.,Yantai,Shandong 264006,China;Unionville high school Canada Ontario L3R 8G5,Canada)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024 [2]烟台慕迪工业技术有限公司,山东烟台264006 [3]Unionville high school Canada Ontario L3R 8G5,Canada

出　　处：《化工设备与管道》2024年第2期9-15,共7页Process Equipment & Piping

摘　　要：在一根天然气制甲醇蒸汽转化炉管内壁某位置发现瘤状物,不仅突出于内壁还向炉管内部生长,导致炉管性能受到严重影响。针对此罕见现象,文章采用光学显微镜,扫描电子显微镜和能谱仪等手段对该瘤状物的组织和成分进行观察分析。结果表明:瘤状物的本质为Cr与Fe的氧化物,与基体之间存在不同于常规氧化物的过渡区,且在瘤状物内部观察到许多富碳的疏松结构。推测瘤状物的形成机制与还原-氧化相互共同作用有关。A tumor was found on the inner wall of a natural gas to methanol steam reformer tube,which not only protruded from the inner wall but also grew inside the tube,causing a serious impact on the tube performance.To address this rare phenomenon,the tissue and composition of the tumor were observed and analyzed by means of optical microscopy,scanning electron microscopy and energy spectrometry.The results show that the nature of the lump is an oxide of Cr and Fe,and there is a transition zone between the tumor and the matrix that is different from that of the conventional oxide,and many carbon-rich loose structures are observed inside the tumor.It is speculated that the formation mechanism of the tumor is related to the reduction-oxidation interactions.

关 键 词：耐热钢 转化炉管 瘤状物 氧化 微观组织 

分 类 号：TQ116.2[化学工程—无机化工]