环氧乙烷装置多效蒸发系统的工程故障诊断及解决方法  

ENGINEERING FAULT DIAGNOSIS OF MULTI-EFFECT EVAPORATION SYSTEM IN ETHYLENE OXIDE PLANT AND THE SOLUTIONS

作　　者：邵璐 Shao Lu(SINOPEC Engineering Incorporation,Beijing,100101)

机构地区：[1]中国石化工程建设有限公司,北京100101

出　　处：《石油化工设计》2021年第4期39-44,I0003,共7页Petrochemical Design

摘　　要：多效蒸发是工业生产中常用的节能工艺,但在实际工程设计中,各效的有效传热温差分配与控制问题却鲜有人提出确切的设计解决办法;以某环氧乙烷装置中开车运行中出现的问题为例,分别从工艺设计和控制运行两方面分析了操作压力偏离设计的原因及影响,运用关键设计方法给出了解决措施,保证了装置的平稳运行,并提出了优化的建议。Multi-effect evaporation is a commonly used energy-saving process in industrial production.However,in actual engineering design,few people have proposed the exact design method for the effective heat transfer temperature difference distribution of each effect.In practice,the temperature difference of each effect is generally realized through self balance.Accordingly,the operation controllability in production is poor,and problems such as pressure fluctuation,liquid flooding or mist entrainment are easy to occur.This paper takes the problems occurred during the start-up of an ethylene oxide plant as an example,analyzes the reasons and effect of the operating pressure deviation from design value from two aspects of process design and control operation,gives solutions to the problems and optimizes the design,greatly improving the operation stability of the plant.

关 键 词：多效蒸发 乙二醇 环氧乙烷 COD超标 

分 类 号：TQ2[化学工程—有机化工]