合成氨装置低温甲醇洗系统贫甲醇含水量升高的原因分析及对策
Cause analysis and countermeasures for increasing water content of lean methanol in low-temperature methanol washing system of synthetic ammonia unit
霍其雷 1尤永平 1李伟1
作者信息
- 1. 中国石油吉林石化公司化肥厂,吉林吉林 132021
- 折叠
摘要
针对中国石油吉林石化公司30万t/a合成氨装置在新增合成气净化系统的工艺改造后,低温甲醇洗系统贫甲醇含水量(质量分数,下同)异常升高(高达2.6％)并超过设计指标值(1.5％),不得不降负荷运行的情况,排查了相关影响因素,分析了导致甲醇/水分离塔塔板筛孔堵塞的原因,并实施了相应的工艺优化措施.结果表明:工艺优化措施实施后,大幅改善了甲醇/水分离塔的分离效果,不仅使该装置低温甲醇洗系统负荷率由82％提升至100％,还使贫甲醇含水量降低至0.4％.
Abstract
In response to the abnormal increase(up to 2.6％)in the water content of lean methanol(mass fraction,the same below)in the low-temper-ature methanol washing system of the 300 kt/a syn-thetic ammonia unit of Jilin Petrochemical Company of PetroChina after the process transformation of the newly added synthetic gas purification system,which exceeded the design index value(1.5％)and had to be operated at reduced-load,the relevant influenc-ing factors were analyzed and investigated,and the reasons leading to the blockage of the sieve holes of the methanol/water separation tower tray were ana-lyzed,then the corresponding process optimization measures were implemented.The results showed that after the implementation of process optimization measures,the separation effect of methanol/water separation from the tower was significantly improved.Not only did it increase the load rate of the low-tem-perature methanol washing system from 82％to 100％,but also reduced the water content of lean methanol to 0.4％.
关键词
合成氨装置/低温甲醇洗系统/甲醇/水分离/贫甲醇含水质量分数/异常升高/塔板堵塞/优化措施Key words
synthetic ammonia unit/low tempera-ture methanol washing system/methanol/water sepa-ration/the mass fraction of water in lean methanol/abnormally increase/tray blockage/optimization measures引用本文复制引用
出版年
2024
NETL
NSTL
万方数据