| 甲苯二异氰酸酯光气回收系统工艺改进与优化 |
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| 引用本文： | 程华农,岳金彩,郑世清.甲苯二异氰酸酯光气回收系统工艺改进与优化[J].化学工程,2006,34(5):68-71. |
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| 作者姓名： | 程华农 岳金彩 郑世清 |
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| 作者单位： | 青岛科技大学,计算机与化工研究所,山东,青岛,266042 |
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| 摘 要： | 对甲苯二异氰酸酯(TD I)光气回收系统中各塔的影响因素进行了模拟和分析,对甲苯吸收塔增加了中间冷却器,确定了甲苯解吸塔氯乙烷和水的采出位置,优化了甲苯精制塔进料位置,增加了盐酸塔。这些改进措施稳定了甲苯吸收塔的操作、提高了HC l回收率、降低TD I装置中氯乙烷质量分数、降低塔的腐蚀,并减少了碱液破坏塔Ⅰ、Ⅱ废碱液排放,达到安全环保的目的。
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| 关 键 词： | 光气回收 工艺改进 优化 |
| 文章编号： | 1005-9954（2006）05-0068-04 |
Retrofit and optimization of phosgene recovery system of tolylene diisocyanate unit |
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| CHENG Hua-nong,YUE Jin-cai,ZHENG Shi-qing.Retrofit and optimization of phosgene recovery system of tolylene diisocyanate unit[J].Chemical Engineering,2006,34(5):68-71. |
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| Authors: | CHENG Hua-nong YUE Jin-cai ZHENG Shi-qing |
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| Affiliation: | Center of Computer and Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong Province, China |
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| Abstract: | The phosgene recovery system of tolylene diisocyanate(TDI) unit was simulated and corresponding(factors) were analyzed aiming at the problems in the actual operation.A middle-cooler was added to the toluene(absorber).The outlet place of the ethyl-chloride and water was identified for the toluene desorber.The feed place of the toluene treatment tower was optimized.In addition,a new hydrochloride tower was added to absorb the HCl in the waster gas.These treatments eliminate the unstable phenomenon of the toluene absorber,increase the recovery of HCl,decrease the ethyl-chloride concentration in whole unit,slow down corrode of towers,decrease the sodium hydroxide needed and make TDI unit more safe and environmental-friendly. |
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| Keywords: | phosgene recovery retrofit optimization |
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