共查询到20条相似文献,搜索用时 619 毫秒
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在传统检测手段无法满足越来越趋向大型化、超大型化的塔器整体两侧直线度的过程检测和控制保障背景下,打破传统思维,大胆创新检测手段,自行设计开发出超大型塔器整体两侧直线度检测整套技术,充分解决超大型塔器整体两侧直线度的检测难题. 相似文献
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本文介绍上海化工研究院多年来对塔器技术,塔填料进行了系统地研究和研制,并测定了各种新型规整填料及散堆填料的技术性能,积累了较丰富的塔器改造经验。对扶风氮肥厂从1.5~2万吨氨/年提高到年产2.5万吨合成氨的要求,进行了以四个塔器为主的气体净化塔器的技术改造,达到上述要求,并取得满意的经济效益。 相似文献
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朱夏霖 《精细化工原料及中间体》2003,(12):14-15
塔器是石油和化学工业生产的关键设备,塔内件和填料又是塔器的核心部分。化工填料和塔内件的先进与落后决定着产品得率、能耗等主要技术经济指标的高与低。 相似文献
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简要介绍了甲醇精馏的主要任务以及甲醇精馏工艺流程的选择和发展,详细介绍了节能型3+1塔的精馏工艺流程及特点,并对甲醇精馏的技术控制要点和节能降耗进行了工艺分析。 相似文献
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针对苯-甲苯和丙烯-丙烷物系,模拟分析了压缩比、进料状态及换热量分布方式对理想内部能量集成精馏塔的操作特性、所需塔内换热面积及节能效果的影响。将模拟结果与传统精馏塔及热泵精馏塔进行比较,结果显示内部能量集成精馏塔的节能效果对于不同物系有较大差别。对苯-甲苯物系,热泵精馏塔的节能效果最好,节能百分率为40%。对丙烯-丙烷物系,理想内部能量集成精馏塔的节能优势明显,节能百分率在60%~80%。本文提出了内部能量集成精馏塔热温匹配的换热量分布方式。模拟结果表明,达到同样节能效果,采用热温匹配的换热量分布方式可以在压缩比较小时大幅度减小传热面积。采用热温匹配的换热量分布方式可以在压缩比较小时大幅度减小传热面积。 相似文献
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Young Han Kim 《Korean Journal of Chemical Engineering》2016,33(9):2513-2521
Distillation is the best option for the separation of hydrocarbon mixtures, unless the boiling points of the constituents are close together. Despite being widely utilized in field applications, the high energy demand of distillation calls for efficient columns in order to save energy. The efficient divided wall column (DWC), diabatic distillation column, and internally heat-integrated distillation column (HIDiC) are introduced here, and the design and control of the columns are briefly reviewed. The practical applications of the columns in the processes of natural gas production from raw gas drawn from underground and benzene separation from naphtha reformate are presented to show the energy-saving performance of the energy-efficient distillation columns. The side-rectifier DWC reduced the heating duty of the conventional system by 5.9%, and provided a compact construction, replacing the three-column conventional system with a single column suitable for offshore application. Moreover, the controllability of DWC was improved by utilizing the side-rectifier. The benzene removal process utilizing the extended DWC lowered the heating duty of the whole conventional process by 56.8%. 相似文献
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内部热耦合精馏是迄今为止所提出的节能效果最好,而唯一没有商业化的节能技术。将内部热耦合技术用于空分塔,可以带来良好的节能效果。根据低温空气分离过程以及三组分精馏的特点,提出了一种新的内部热耦合空分精馏塔优化模型。在优化模型基础上,对热耦合塔进行了深入的节能优化与分析,并且与常规空分仿真结果进行了比较分析,压缩机能耗下降20.75%,产值增加17.46%,单位产值能耗下降32.53%。内部热耦合空分塔的提取率以及能耗均优于常规热耦合空分塔,节能效果显著。 相似文献
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Eun Joo Lee 《Chemical Engineering Communications》2018,205(10):1311-1322
Dilute acetic acid is obtained primarily from fermentation and synthesis processes and cannot be produced by simple distillation due to relatively low volatility of acetic acid compared to water. Instead, an azeotropic distillation is applied to increase the concentration of dilute acetic acid. When acetic acid is extracted from a dilute aqueous solution using a solvent mixture of ester and alcohol, its recovery requires an energy-intensive azeotropic distillation. In the water stripping process that follows azeotropic distillation, two distillation columns handle the acetic acid and water mixture in similar composition. Therefore, the two columns can be combined as a side stripper connected to the azeotropic distillation column. The energy-saving effect is examined with the HYSYS (Aspentech Corporation) evaluation of the process. Compared to the conventional process, the modified process suggests 39% reduction in heating duty and 24% coolant savings. The economic analysis shows 32% decrease in investment and 36% utility savings. Based on heat utilization analysis, the thermodynamic efficiency is enhanced by 11%. 相似文献
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隔壁塔技术是一种效果优良的过程强化与精馏节能技术。具有特殊结构的隔壁塔相比常规精馏塔具有较高的热力学效率。对于相同的分离任务,隔壁塔所需的能耗较低,同时隔壁塔技术的应用也降低了设备数量和投资。文中通过对隔壁塔内部结构的讨论和热力学有效能转化的分析,阐释了隔壁塔的节能原理;并以粗苯精制流程中甲苯-二甲苯-重苯的分离为例,在三组元精馏流程的分析之上设计了2套精馏流程方案,对其进行了严格计算和优化,相比于传统的顺序分离双塔流程,隔壁塔可节省能耗41.5%,同时减少了设备的数目和投资。 相似文献