稀乙烯高效转化技术

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(编辑杜婷婷)

Analysis of the causes of internal leakage of reforming gas steam generator of hydrogen generation unit and treatment

Lu Chao

(SINOPEC Wuhan Company,Wuhan,Hubei430000)

Abstract:In early March2018,a rapid decline of temperature of refonning gas at the outlet of the steam generator BE101of the120,000TPY hydrogen unit of SINOPEC Wuhan Company occurred,and the differ­ence between water and steam production of BE101was increased,which was the result of internal leakage of BE101.The operation was maintained by reducing the pressure difference between BE101and the reformer system,adding3.5MPa steam,reducing the treatment capacity,controlling the ratio of water to carbon at M3.5,the temperature of reforming gas at the outlet of BE101at^285X.,and the outlet steam tempera­ture of the second stage of convection at W405to maintciin the production.On March26,the unit was shut down when the temperature of reforming gas dropped to281The causes of internal leakage were analyzed by inspection of the tube bundles and analysis of the fouling samples.It was concluded that the concentration of the catalyst powders in BE101tube bundle led to the fouling formation of the tube bundle,and further caused the under-fouling corrosion,resulting in the thinning and perforation of the tube bundles.In addition, the emphasis of monitoring and maintenance during the operation of steam generator as well as the processing concern after the occurrence of internal leakage are recommended.

Key Words:hydrogen generation,steam generator,internal leakage,reforming catalyst,powder collection 国内外动态

稀乙烯高效转化技术

新年伊始，国家科技奖励大会在京隆重举行，中国石化稀乙烯增值转化高效催化剂及成套技术项目荣获2018年度国家科技进步二等奖上海石油化工研究院与洛阳工程有限公司、石油化工科学研究院、青岛炼油化工有限公司等单位协力攻关，为中国石化打造又一张亮丽名片。

我国稀乙烯有效成分浓度低、组成复杂，通过精制分离回收乙烯流程长H能耗高、投资巨大。考虑到杂质、浓度及工艺流程等原因，上海石油化工研究院杨为民教授领导的科研团队转换思路.使稀乙烯资源不经精制回收，直接通过催化转化生成乙苯等化学品.顺利实现分离和反应耦合，不仅大幅降低能耗，而且充分利用了乙烯资源：上海石油化I：研究院科研团队与石油化工科学研究院团队密切合作，在催化材料方面取得形貌择向纳米MFI 分子筛及多级孔高硅FAU分子筛催化材料等关键技术突破。他们开发出低苯烯比稀乙烯制乙苯催化剂，在多家企业实现工业应用,结果表明.该催化剂具有优良的扩散性能，在维持高转化率和高选择性指标基础上.可大幅降低乙苯生产能耗.烷基化再生周期超过19个月，使用寿命超过3年,烷基转移催化剂使用寿命达7年以上＜在工艺方面，创新选择性预处理及高效反应分离工艺,大幅提高资源利用率.物耗、能耗大幅降低.乙烯总冋收率达到96%以上.集成创新的节能和大型化成套技术，可以适应多种稀乙烯原料，增产高端产品。

目前.稀乙烯增值转化高效催化剂及成套技术11得到许可，应用于包括30万吨/年宁波大榭石化等多家乙苯生产企业，乙苯产量全年超过百万吨：近3年累计新增销售额上百亿元.新增利润数十亿元，经济效益显茗稀乙烯增值转化高效催化剂及成套技术对我国炼油及化工绿色技术的创新引领也发挥了重要作用。该项目具有完全自主知识产权，已获得国内外多家公司的认可和应用意向，市场前景广阔‘

(郑宁来供稿)

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