乙烯装置冷箱脱甲烷系统模拟优化

中国石化扬子石化股份有限公司烯烃厂650kt／a乙烯装置因二元制冷系统效率低，无法为冷箱、脱甲烷塔系统提供足够的冷量，加之部分操作控制指标不尽合理，导致乙烯损失大。文中介绍了应用Aspen软件对该系统工艺流程进行模拟计算的过程，分析了存在的问题，提出了最优化操作控制指标。     

Performance Prediction of Structured Packing Column for Cryogenic Air Separation with Hybrid Model

A detailed investigation of a thermodynamic process in a structured packing distil ation column is of great impor-tance in prediction of process efficiency. In order to keep the simplicity of an equili...     

基于废料最少的反应-分离系统综合新策略

环境污染关系着人类的生存与发展,如何使化工生产过程产生的废料最少,甚至达到零排放,反应-分离系统综合起着十分重要的作用。文中综述分析了反应-分离系统综合的研究进展,提出了以废料最少为目标的反应-分离系统综合新策略,指出了该领域的进一步发展趋势。     

基于废料最少的反应／分离系统综合新策略

环境污染关系着人类的生存与发展,如何使化工生产过程产生的废料最少,甚至达到零排放,反应／ 分离系统综合起着十分重要的作用。本文综述分析了反应／ 分离系统综合的研究进展,提出了以废料最少为目标的反应／ 分离系统综合新策略,指出了该领域的进一步发展趋势。     

Energy Minimization in Cryogenic Packed Beds during Purification of Natural Gas with High CO2 Content

Minimization of energy consumption was explored for countercurrent switched cryogenic packed beds in which separation of CO₂ and other components of natural gas can be achieved based on differences in freezing or desublimation points. Highly pure CO₂ and methane were obtained after separation. An experimental setup for CO₂ removal from natural gas was constructed and a detailed experimental study was conducted by changing different operating parameters. Compared to other cocurrent or jacket‐cooled constant‐temperature configurations, countercurrent switched beds provided optimal separation and energy efficiencies. The effects of important process parameters like initial temperature profiles of the cryogenic bed, feed composition, and feed flow rate on energy requirement, bed saturation, bed pressure, and cycling times were investigated. The energy requirement for cryogenic packed beds was compared with the conventional cryogenic distillation process.     

布朗型合成氨装置深冷净化系统综述

介绍市朗型合成氨装置深冷净化系统     

空分冷箱工艺流程模拟

利用Aspen Plus软件对空分冷箱工艺进行模拟,并对模型状态方程中关键组分的二元交互作用参数进行修改,模拟结果与设计值十分吻合。模拟结果表明:各组分含量、温度和流量的误差均在1%之内。由此可知,优化的模型可以较好地应用于空分冷箱工艺流程模拟。     

空气分离装置的模拟与优化

采用ASPEN系统模拟软件对某空分装置的设计工况和实际工况进行了模拟计算,给出了以纯氧产量最大为目标函数的操作参数的优化结果,其结果可以为空气深冷分离设计和操作提供可靠的参考数据。     

煤制合成气低温甲醇洗工序管道布置总结

根据煤制合成气低温甲醇洗涤净化工艺装置系统特点,对其管道布置在工程设计时的一些特殊要求进行总结,供工程设计人员参考。     

Sidestream Analysis and Optimization of Full Tower Internal Thermally Coupled Air Separation Columns

An appropriate sidestream is the key to improve the yields and purities of products in the cryogenic air separation process. The sidestream of a full tower internal thermally coupled air separation column is characterized. Sensitivity analysis indicates that heat duty distribution, purities, and yields of the products are strongly influenced by the withdrawn position and the flow rate of the sidestream. Optimization models are proposed by adopting the minimum flow rate of the low‐purity liquid nitrogen product and with maximum flow rates of the oxygen product or nitrogen product as optimization target. The optimization research allows selecting the optimum operating conditions with different production requirements.     

气体分馏装置的操作调优

本文以某气体分馏装置为例,通过严格的流程模拟,分析了产品质量、回流比和塔压等操作参数对总经济效益的影响。     

模型预估控制在空分装置中的设计应用

简要介绍空分装置的工艺操作特点、模型预估控制原理,以及模型预估控制在空分装置中的设计应用。     

碳酸钾分离乙醇–丙酮–丁醇–水体系

测定了乙醇–丙酮–丁醇–水–碳酸钾体系在25℃时的液–液相平衡数据,结果表明, 有机物水溶液可简化为二元系处理, 可用Pitzer理论和Wilson方程对相平衡数据进行关联计算,计算值与实验值符合良好．采用碳酸钾分离乙醇–丙酮–丁醇–水体系,碳酸钾的脱水率高达95.6%．     

1-己烯产品分离工艺优化

针对1－已烯产品的特性，在工艺流程中，利有流程模拟软件Aspen,对不同的分离工艺进行了探讨和研究。在物系分析的基础上，提出了多组分精馏与闪蒸相结合的工艺流程；并对先脱重后脱轻、先脱轻后脱重以及同时脱轻脱重3种可行的分离方案进行了模拟计算，从而确定了最合理的带侧线塔的二塔分离流程。     

空气分离工程的冷箱配管设计

介绍了空气分离工程设计中冷箱内的管道布置,低温液体泵的管道布置,完善冷箱面板图,冷箱管道的应力问题,材料选用及施工要符合低温要求的基本思路。     

焦油氨水分离系统优化实践

焦油氨水分离系统分离效果差、氨水中含油量高不仅会堵塞氨水喷嘴,影响煤气冷却效果,而且给废水蒸氨以及污水处理带来了很大的难度。本文根据现场调查情况,对焦油氨水分离系统分离效果差、氨水中含油量高原因进行初步分析,并介绍了华菱煤焦化公司该系统优化改进实践的具体措施,通过一系列优化实践,有效的降低了氨水中含油量。     

Engineering an Anti‐Graffiti System: A Study in Industrial Product Design

The objective of this work was to develop products for the anti‐graffiti market using a product design framework that takes into account the company core practices and meets customer expectations. Product development comprised several concurrent steps including market research and analysis to determine the market potential using a Quality Functional Deployment tool. From market research it was estimated that anti‐graffiti products had significant potential within Australia. A range of technical and quality parameters were tested. The Hildebrand and Hansen solubility parameters, viscosity and diffusivity estimates were mainly used for technical evaluation of products. An iterative process was used throughout in conjunction with parameter restraints to meet environmental sustainability, waste reduction and minimize resource consumption. The result was a cost effective product, tailored to customer expectations.     

化工专业多层次分离工程课程体系构建的研究与实践

介绍了在化工专业开展分离工程多层次课程体系建设的探索与实践。针对化工专业从专科到本科(一本,二本和英才班)等不同层次的分离工程课程教学,阐述了构建适应不同层次培养需要的课程体系的必要性及可行性,提出了按照各类基础研究型人才、应用技术型人才和一般技术人才的培养定位,设计难易有别、基础与应用并重、统一性与灵活性兼备的分离工程课程体系结构,并根据课程体系设计要求改革教学内容和教学方法。     

异丙醇一步法生产甲基异丁基酮分离过程的研究

对异丙醇一步法合成甲基异丁基酮工艺的分离过程进行了基础测定,包括气液平衡和液液平衡测定;对原有的甲基异丁基酮分离工艺进行了研究,应用萃取精馏的原理,提出了改进的工艺流程设想,预计可使甲基异丁基酮的回收率由32％提高到91．7％,每吨产品消耗蒸气由11．42t降至8．27t。