共查询到20条相似文献,搜索用时 140 毫秒
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对氯乙烯生产中高沸塔排污与回收操作进行智能化改造,对自控气动阀、循环泵及风机等设备进行联锁控制改造,解决了操作频繁、劳动强度高、人为误操作的问题,实现了高沸塔生产的智能控制. 相似文献
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介绍了氯乙烯生产中设备的腐蚀状况,探讨了设备衬里的材质选择情况,着重叙述了氯乙烯泡沫水洗塔结构及衬里的选择。 相似文献
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介绍了新型喷嘴孔型垂直筛板塔的结构,操作原理及在氯乙烯单体精馏中的应用情况,与原使用塔型比较,塔分离效率高,处理能力大,设备投资少。 相似文献
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氯乙烯尾气回收装置变压吸附改造 总被引:2,自引:0,他引:2
介绍了氯乙烯尾气回收变温变压吸附和恒温变压吸附原理,阐述了对氯乙烯尾气回收工艺改造的目的和方案。通过改造,吸附塔长期稳定运行,产品气的质量能满足转化装置的要求,且能回收大量的氯乙烯和乙炔。 相似文献
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在粗氯乙烯净化工序采用组合吸收塔替代降膜塔、泡沫塔、水洗塔等设备,提高了粗氯乙烯净化效率,使氯乙烯净化系统压力由14.7 kPa降为6.7 kPa,副产盐酸质量分数由20%~25%提高到31%以上。 相似文献
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介绍了氯乙烯精馏高沸物提纯二氯乙烷装置的原理、工艺及运行过程中存在的问题,并采取相应的改进措施,确保了装置的连续、稳定运行,不仅解决了重大安全问题,还创造了一定的经济效益. 相似文献
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K. L. Paciorek R. H. Kratzer J. Kaufman J. Nakahara A. M. Hartstein 《应用聚合物科学杂志》1974,18(12):3723-3729
“Pure” poly(vinyl chloride) resin and four compositions containing poly(vinyl chloride) were subjected to oxidative thermal degradation in air at &400°C both in a quiescent and a flow system. The volatiles formed were identified and quantitatively determined on a gram-per-gram basis. Hydrogen chloride was the main product found. The nature and relative concentration of the produced organic chlorinated species appeared to be dependent not only on the poly(vinyl chloride) constituent but also on the other ingredients. All the compositions contained phthalate ester plasticizers. In the dynamic system, these distilled largely unchanged, whereas under static conditions transformation into phthalic anhydride occurred. 相似文献
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采用Aspen Plus通用模拟软件模拟计算了氯乙烯双塔精馏过程,得到了适宜的操作参数,对氯乙烯的工业生产具有一定的指导意义。 相似文献
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阐述了偏氯乙烯合成过程中氯化、皂化、精馏等工序的生产要点,通过严格的工艺控制,使偏氯乙烯的纯度稳定在99%以上(氯乙烯含量小于0.5%),每生产1t偏氯乙烯消耗氯乙烯单体为780kg。 相似文献
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Coal liquids distillation tower corrosion: chloride analysis of solvent refined coal process samples
Burtron H. Davis Gerald A. Thomas Alberto A. Sagüés Carlton H. Jewitt Kenneth L. Baumert 《Fuel Processing Technology》1983,8(1):77-93
Severe chloride corrosion incidents have occurred in the distillation area of major direct coal liquefaction plants. Chloride analyses have been carried out for samples collected at various process streams of one of these plants (the Wilsonville, Alabama SRC-1 pilot plant) in order to define the pathway of corrosive species to the distillation area. These analyses show that the major fraction of the chloride in the atmospheric distillation tower is carried there in the higher-boiling process streams. The chloride level at a particular point in the atmospheric distillation tower may be several times that of the tower feed liquid; this concentration contributes to the catastrophic corrosion experienced in these towers. This chloride concentration provides an explanation for the occurrence of the corrosion in the last distillation tower in the process stream, rather than in the tower(s) first contacted by the chloride containing distillate stream. It also accounts for the observed localization of the corrosion within narrow regions of the atmospheric distillation tower. The chloride concentration and the chloride pathway are factors which designers of coal liquefaction distillation processes need to consider in a design that will keep corrosion to a manageable level. 相似文献
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氯乙烯精馏自聚严重影响氯乙烯装置的正常生产,通过对装置、设备及工艺指标的对比分析,采取HCL净化,添加阻聚剂,调整氯乙烯pH值,调整设备及对工艺指标的控制,使精馏自聚问题得到有效控制,延长管道、设备堵塞周期。 相似文献
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[摘要]针对氯乙烯装置精馏塔检修时敞口煮塔工艺异味大、环境污染严重等缺点,进行了精馏塔密闭煮塔改造.避免了煮塔时化工异味的产生,又回收了残存的有机物,具有明显的经济效益和环保效益。 相似文献