甲醇制烯烃装置降低催化剂跑损及负荷提升的改造实践  

Revamping and Practice of Reducing Catalyst Loss and Increasing Load in Methanol-to-Olefin Plant

作　　者：金海峰 张永民[1] 关丰忠 李国锋 高文刚 Jin Haifeng;Zhang Yongmin;Guan Fengzhong;Li Guofeng;Gao Wengang(State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China;Shenhua Xinjiang Chemical Co.,Ltd.,Urumqi Xinjiang 831404,China)

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249 [2]神华新疆化工有限公司,新疆乌鲁木齐831404

出　　处：《煤化工》2021年第1期72-75,85,共5页Coal Chemical Industry

摘　　要：针对某甲醇年处理量180万t的甲醇制烯烃装置自投产以来存在的细粉损失严重问题进行了原因分析,发现是由再生器中沉降高度低、旋分入口浓度高、入口气速高于设计值导致的压降高、料腿排料困难所致。通过将再生器外取热器流化风由氮气改为空气,之后引入氧气进一步提升再生烧焦能力,在维持再生器旋分系统入口气速和压降合适的基础上,改善了装置的跑剂问题,实现了装置处理量最高8.3%的提升,初步预估年效益可增加0.9亿元。Since the startup of a 1.8 Mt/a methanol-to-olefin(MTO)plant,there existed serious loss of catalyst fine powder.It was caused by the low settling height in the regenerator,the high inlet solid concentration and gas velocity of the cyclone separator led to high pressure drop and difficult dust discharge from the dipleg.To solve this problem,the fluidizing nitrogen of the regenerator external cooler was changed into air,after which the oxygen was introduced to further increase the coke-burning capacity in the regenerator.While maintaining the appropriate inlet gas velocity and pressure drop of the regenerator cyclone system,the problem of catalyst loss was improved,and a maximum 8.3%increase in the processing capacity of the plant was achieved,with a preliminary estimate of annual profit increase of 90 million Yuan.

关 键 词：甲醇制烯烃 流化床反应器 再生器 氮气 氧气 旋风分离器 催化剂损失 

分 类 号：TQ221.21[化学工程—有机化工]