环氧乙烷/乙二醇装置低温热回收利用分析  

Recovery of Low-temp Heat from EO/EG Unit

作　　者：张继东[1] 叶剑云[2] 李俊恒[1] 王北星[2] 

机构地区：[1]中国石油大学(北京),北京102249 [2]中国石化集团公司节能技术服务中心,北京100029

出　　处：《石油石化节能与减排》2014年第1期6-9,共4页

摘　　要：分析环氧乙烷/乙二醇装置低温热利用情况,通过对环氧乙烷汽提塔、轻组分汽提塔、干燥塔进料流程的优化,最大限度的回收装置内低温热,提升进料温度。针对装置冷量不足,而低温热过剩的情况,提出利用以低温热为热源的溴化锂制冷技术,制取低温冷却水,降低循环吸收水的温度。改进后,可节约蒸汽13.5 t/h、降低冷却负荷103 GJ/h,节水节电效果明显。The recovery and reutilization of low-temperature heat from EO/EG unit are analyzed. After optimization revamp of feed processes of EO stripping tower, EG stripping tower and drying tower, the maximum recovery of the low-temp heat within the units has been achieved to raise the feed temperature. Given the situation of insufficient cooling capacity and surplus low-temp heat, the LiBr refrigeration technology with low-temp heat as heating source is put forward to produce low-temp cooling water and lower the temperature of the circulated absorbing water. According to preliminary calculations, the optimization can save heating stream 13.5 t/h, and reduce cooling load 103 GJ/h. The energy-saving and water-saving effects are obvious.

关 键 词：环氧乙烷/乙二醇 低温热利用 节能 

分 类 号：TQ223.16[化学工程—有机化工]