共查询到20条相似文献,搜索用时 140 毫秒
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乙烯装置深冷系统模拟与优化 总被引:1,自引:0,他引:1
分析了扬子乙烯装置因二元制冷系统效率低,不能给深冷系统提供足够的冷量,加之部分操作控制指标不尽合理,乙烯损失大等问题,应用Aspen Plus软件对该系统工艺流程进行模拟计算,找出问题的原因,提出最优化操作控制指标,实现了装置的经济运行。 相似文献
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综述了浓缩双氧水生产中的操作控制问题,通过改进工艺流程和改善操作控制条件,使系统运转稳定,以保证各项工艺技术指标符合要求。 相似文献
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本文根据武汉乙烯热电联产装置65MW双抽凝汽式汽轮发电机系统的实际情况,结合凝结水泵在机组试运行过程中出现的故障实例,对其进行原因分析,并从流程设计,设备管理,操作控制等方面提出解决方法,并以此为例探讨预防抽空故障与气蚀故障的症状异同以及判断方法。 相似文献
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乙烯原料优化与技术改进 总被引:1,自引:0,他引:1
天津联化乙烯装置原料原设计用石脑油和轻柴油,为提高乙烯装置的综合效益,降低乙烯成本,投产几年来不断地优化乙烯原料,与天津石化公司一道炼油-化工一体化优化原料,优化配给,优化主要指标,优化生产,为适应各种原料,对裂解炉进料系统进行技术改进,近3年来乙烯,丙烯气相收率明显提高,单耗,能耗不断下降。 相似文献
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介绍加煤系统改造过程,简化了原加煤系统操作控制,方便了操作,便于维修,减少了因加煤系统造成的停车次数,降低了造成气炉运行费用。 相似文献
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本文针对武汉乙烯装置的实际情况,探讨影响乙烯收率的主要因素,通过研究实施裂解炉深度控制,原料优化,反应器、冷箱、塔器操作优化等有效措施,最终实现提高乙烯收率的目的。 相似文献
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200 kt/a乙烯裂解装置改造效果分析 总被引:3,自引:0,他引:3
中国石油化工股份有限公司广州分公司化工一部乙烯装置于2003进行了技术改造,从装置负荷、裂解炉的操作条件、产品收率、原料规格、能耗及环保指标对装置进行了标定,并总体评价装置的改造效果。改造后该装置仍存在几个问题:裂解炉数量不足、急冷水乳化、燃料气系统及蒸汽不平衡、循环水能力不足、丙烯塔损失大。改造后各项经济技术指标基本能达设计要求 相似文献
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乙烯装置分离冷区工艺流程复杂,技术难度高,是全装置工艺设计的关键.以某200 kt/a乙烯挖潜改造、1100 kt/a乙烯装置改造和1190 kt/a乙烯装置改造为例,着重论述了顺序分离流程冷区改造的工艺技术特点,对深冷及脱甲烷系统、制冷系统和碳二分离系统的工艺改造方案进行了说明,分析了各装置在具体改造方案上的工艺技术... 相似文献
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A new reactor system for gas‐phase ethylene/α‐olefin polymerization is described. Good gas‐phase temperature control at high polymerization rates was achieved with the 2‐L semi‐batch reactor. Ethylene/1‐hexene and ethylene polymerization results showing the effects of operating conditions on temperature profiles are presented. Good gas‐phase temperature control is required to obtain reliable activity profiles. A gas‐sampling and analysis system, which allows relatively rapid (< 3 min) and accurate determination of ethylene/1‐hexene contents in the gas‐phase of the reactor, is also described. Rapid and reliable hydrogen contents were also measured with this relatively inexpensive system. 相似文献
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以廉价天然气中的乙烷和丙烷为原料的乙烯成本仅是石脑油等重质原料成本的30%,高压管输天然气进入城市门站分输需调压,调压过程中有大量压力能可利用。本文以某段高压管输天然气为原料,提出了处理量60×104m3/h的轻烃分离回收工艺流程,综合考虑轻烃回收率、系统功耗、CO2冻堵、冷箱传热温差等因素,优化操作参数,完成了系统能量的高效集成,实现了轻烃分离工艺的节能降耗。该方案C2回收率达90%以上,可为乙烯装置提供优质的乙烷等轻烃原料50.75万吨/年,有利于解决乙烯工业发展的原料瓶颈,提高天然气、乙烯工业的整体经济效益。 相似文献
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Thiago Gonçalves das Neves Wagner Brandão Ramos Gilvan Wanderley de Farias Neto Romildo Pereira Brito 《Korean Journal of Chemical Engineering》2018,35(4):826-834
We developed and implemented an intelligent control system to be used in an extractive distillation column that produces anhydrous ethanol using ethylene glycol as solvent. The concept of artificial neural networks (ANN) was used to predict new setpoints after disturbances, and proved to be a fast and feasible solution. The developed control system receives data from temperature, flowrate and composition measurements of the azeotrope feed, and the ANN estimates the new set-points of the controllers to maintain 99.5 mol% of ethanol at the top and less than 0.1mol% at the bottom; feed composition was also estimated using an ANN. All ANN were trained to provide output data corresponding to an optimized operating condition. The results showed that the intelligent control system can predict a new operating condition for any disturbance in the column feed and presented superior performance when compared with the control system without ANN. 相似文献
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The integrated cold box and demethanizer system as one of the most critical production sections in an ethylene plant couples multistage refrigeration and cryogenic separation to extract hydrogen and methane from the cracked gas feed. Ethylene and the heavier components are liquefied for recovery in the downstream process. During separation, ethylene contained in the methane and hydrogen streams is accounted as the product loss which in reality is significant. To reduce the ethylene loss with energy consumption consideration, a systematic methodology has been developed to optimize the process operation of the integrated cold box and demethanizer system. It covers rigorous simulation model development and validation, sensitivity analysis, operational optimization, and result analysis. The optimization results demonstrate the significant economic benefits of the proposed methodology. 相似文献