甲醇制烯烃装置衬里磨损分析及优化措施

LINING WEAR ANALYSIS OF METHANOL-TO-OLEFIN PLANT AND OPTIMIZATION MEASURES

现有甲醇制烯烃(MTO)装置衬里设备和管道运行过程中器壁热点、衬里脱落、器壁被磨穿和催化剂泄漏等故障时有发生,测温监测和处理难度很大。从设备和管道内部床层分布状态、介质运行情况进行分析,发现反再系统不同床层催化剂浓度和粒径对衬里和内件的磨损不同。基于床层结构进行优化设计,将内件改为采用内外侧双衬里结构,可以有效减缓内件磨损。同时比较了不同的开停工升降温时间,找出了设备运行中导致衬里损坏的另一个主要因素,对于预防衬里损坏、失效和延长衬里使用寿命具有积极作用。

During the operation of the lining equipment and pipeline of the existing MTO plant,failures such as hot spots on the equipment wall,shedding of the lining,wear-out of the equipment wall and leakage of the catalyst occur from time to time,so it is very difficult to monitor and handle the temperature.Based on the analysis of the distribution of the bed layer and the operation of the medium in the equipment and pipeline,it was found that the different concentration and particle size of the catalyst in the bed layer of the anti-regenerator system have different wear on lining and the internals.Based on the bed structure,the inner parts and the lining structure were optimized.The inner parts using the inner and outer double lining structure can effectively reduce the wear of the inner parts.Meanwhile,by comparing the different temperature rise and temperature reduction time during start-up and shut-down,another main factor of lining damage was found out,which has positive effect on preventing lining damage and failure and prolonging its service life.