|本期目录/Table of Contents|

[1]黄一峰.环氧乙烷/乙二醇装置乙二醇紫外透光率降低原因分析及对策[J].石化技术与应用,2023,6:476-480.
 HUANG Yi-feng.Analysis and countermeasures for reduction of ultraviolet transmittance of monoethylene glycol in ethylene oxide/ethylene glycol plant[J].Petrochemical technology & application,2023,6:476-480.
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环氧乙烷/乙二醇装置乙二醇紫外透光率降低原因分析及对策(PDF)

《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]

期数:
2023年6期
页码:
476-480
栏目:
出版日期:
2023-11-10

文章信息/Info

Title:
Analysis and countermeasures for reduction of ultraviolet transmittance of monoethylene glycol in ethylene oxide/ethylene glycol plant
文章编号:
1009-0045(2023)06-0476-05
作者:
黄一峰
福建古雷石化有限公司 化工四部,福建 漳州 363200
Author(s):
HUANG Yi-feng
Chemical Department IV of Fujian Gulei Petrochemical Co Ltd,Zhangzhou 363200,China
关键词:
乙二醇(MEG)环氧乙烷(EO)环氧乙烷/乙二醇装置紫外透光率(UV值)精制系统操作优化
Keywords:
monoethylene glycol (MEG)ethylene oxide (EO)ethylene oxide(EO)/ethylene glycol(EG) plantultraviolet transmittance (UV value)refining systemoperational optimization
分类号:
TQ 424.29
DOI:
DOI:10.19909/j.cnki.ISSN1009-0045.2023.06.0476
文献标识码:
B
摘要:
针对福建古雷石化有限公司10/70万t/a环氧乙烷/乙二醇(EO/EG)装置,在满负荷运行时,乙二醇(MEG)产品紫外透光率(UV值)持续缓慢下降的情况,不仅分析了相关影响因素及其原因,还实施了相应对策。结果表明:需实施如下对策,规范优化MEG采样分析操作流程,并确保在采样后的1 h内及时取样、化验分析;降低EO汽提塔pH值,并稳定受控于5.5~7.0;将EO反应温度从235.25 ℃降低至229.67 ℃;对水处理单元的阴阳树脂适时鼓泡再生处理3 h;将满负荷运行时的MEG塔侧线含醛质量分数从109×10-6 降低至59×10-6 。在上述对策优化实施后,银催化剂的选择性从84.5%提高至86.0%,MEG产品在275 nm波长紫外光下的UV值从92.3%提高到94.7%。
Abstract:
Aiming at the continuous and slow decrease in the UV transmittance (UV value) of monoethylene glycol(MEG) products during full load operation of the 0.1/0.7 Mt/a ethylene oxide(EO)/ethylene glycol(EG) unit of Fujian Gulei Petrochemical Co Ltd,the relevant influencing factors and reasons were analyzed,and the corresponding countermeasures were implemented. The results showed that the countermeasures were as follows: standardized and optimized MEG sampling & analysis process,and ensured timely sampling & analysis within 1 h after sampling;Reduced pH value of EO stripper and stably controlled at 5.5-7.0;Reduced EO reaction temperature from 235.25 ℃ to 229.67 ℃;Timely did the bubbling & regenerating operation for the anion & cation exchange resins of the water treatment unit for 3 h;Decreased the mass fraction of formaldehyde in the side line of MEG tower from 109×10-6 to 59×10-6 during full load operation. After the optimization and implementation of the above countermeasures,the selectivity of silver catalysts increased from 84.5% to 86.0%,and the UV value of MEG products increased from 92.3% to 94.7% under the 275 nm ultraviolet light .

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2023-11-10