[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:
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2023年6期
- 页码:
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476-480
- 栏目:
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- 出版日期:
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2023-11-10
文章信息/Info
- Title:
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Analysis and countermeasures for reduction of ultraviolet transmittance of monoethylene glycol in ethylene oxide/ethylene glycol plant
- 文章编号:
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1009-0045(2023)06-0476-05
- 作者:
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黄一峰
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福建古雷石化有限公司 化工四部,福建 漳州 363200
- Author(s):
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HUANG Yi-feng
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Chemical Department IV of Fujian Gulei Petrochemical Co Ltd,Zhangzhou 363200,China
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- 关键词:
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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:
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monoethylene glycol (MEG); ethylene oxide (EO); ethylene oxide(EO)/ethylene glycol(EG) plant; ultraviolet transmittance (UV value); refining system; operational optimization
- 分类号:
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TQ 424.29
- DOI:
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DOI:10.19909/j.cnki.ISSN1009-0045.2023.06.0476
- 文献标识码:
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B
- 摘要:
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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:
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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
[1] 朱松. 聚酯工艺塔废水中乙二醇含量分析[J].聚酯工业,2008,21(3):26-27.[2] 杨秀丽,戴传波,孙燕等. 影响工业乙二醇紫外透光率—UV值的因素分析[J].广州化工,2009,37(8):181-182. [3] 王跃,黄起中,杨韬,等. 煤基乙二醇紫外透光率影响因素的探究[J].化学研究,2023,34(1):37-44.[4] 金海明. 乙二醇产品质量情况分析及对策[J].山东化工,2022,51(15):147-149.[5] 陈红. 对乙二醇成品UV值影响因素的探讨[J].金山油化纤,1997,16(3):3-6.[6] 孙明立. 乙二醇产品UV值不合格分析及措施[J].当代化工,2013,42(1):111-115.[7] 白爱花,石艳花,张玉兰,等. 二氧化硅负载磷钨酸催化合成丁醛乙二醇缩醛[J].化工中间体,2013,10(9):34-37.[8] 邱燕菊. 环氧乙烷精制塔在高负荷下的操作和优化[J].山东化工,2021,50(12):119-121.
更新日期/Last Update:
2023-11-10