共查询到20条相似文献,搜索用时 156 毫秒
1.
聚丙烯的生产是我国经济发展过程中的重要产业,聚丙烯生产水平的提高有着十分重要的作用和实际的意义.通过对聚丙烯的生产过程的角度出发,明确了聚丙烯的生产工艺,而后阐述了聚丙烯生产过程中的优化控制,同时在对聚丙烯的生产过程的优化控制和分析的基础之上进行建模研究,对聚丙烯的生产优化提供了一定的参考. 相似文献
2.
聚丙烯的生产是我国经济发展过程中的重要产业,聚丙烯生产水平的提高有着十分重要的作用和实际的意义。通过对聚丙烯的生产过程的角度出发,明确了聚丙烯的生产工艺,而后阐述了聚丙烯生产过程中的优化控制,同时在对聚丙烯的生产过程的优化控制和分析的基础之上进行建模研究,对聚丙烯的生产优化提供了一定的参考。 相似文献
3.
聚丙烯是我国的支柱产业之一,提高聚丙烯的生产水平具有十分重要的理论和现实意义。本文拟从聚丙烯生产过程角度出发,首先介绍了聚丙烯的生产工艺,接着重点阐述了聚丙烯生产过程的优化控制,在此基础上,对聚丙烯生产过程进行了建模研究。 相似文献
4.
针对丁二烯生产过程的特点,分析和探讨了制造执行系统(MES)的结构和功能,提出丁二烯生产过程MES的功能模块设计,实现丁二烯生产过程的优化控制、优化运行和优化管理,提高企业的综合竞争力. 相似文献
5.
6.
针对MDI生产过程的特点,分析和探讨了制造执行系统(MES)的结构和功能,提出MDI生产过程MES的功能模块设计,优化控制、优化运行和优化管理,提高了企业的综合竞争力。 相似文献
7.
8.
工业自动化的快速发展给化工企业实施综合自动化创造了良好的基础条件。针对丁二烯生产过程的特点,分析和探讨了制造执行系统(MES)的结构和功能,提出丁二烯生产过程MES的功能模块设计。实现丁二烯生产过程的优化控制、优化运行和优化管理。提高了企业的综合竞争力。 相似文献
9.
基于多元统计过程控制方法首次对宁夏煤业公司4 Mt/a费托合成装置生产过程进行了分析,利用主元分析法提取了该过程多元自相关工艺参数的主元,并建立了基于主元的多元控制图,最终在统计受控状态下对该过程进行了过程能力评价。提出的多元控制图对于费托合成生产过程的分析和监控具有一定的指导作用,同时通过过程能力评价确认了该过程可以满足工艺操作的要求,但仍具有优化的潜力。 相似文献
10.
11.
在介绍7.63m焦炉PROven系统工艺原理的基础上,分析了该自动控制系统的软硬件结构,并对实现碳化室压力自动调节的PID算法进行了深入研究,优化其控制参数,达到了稳定炉压的目的. 相似文献
12.
Y. P. Gupta 《加拿大化工杂志》1988,66(1):141-144
There has been a growing interest in control strategies that optimize a given performance criterion to improve process efficiencies. Optimal control techniques, such as LQP, have been available but did not find much acceptance in process industries because of certain problems that are involved in their application. In this paper an approach is presented which alleviates these problems. Simulation results show that the proposed approach works well for servo and regulatory control problems. 相似文献
13.
A feedback control framework for safe and economically‐optimal operation of nonlinear processes
下载免费PDF全文
![点击此处可从《American Institute of Chemical Engineers》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Fahad Albalawi Anas Alanqar Helen Durand Panagiotis D. Christofides 《American Institute of Chemical Engineers》2016,62(7):2391-2409
Maintaining safe operation of chemical processes and meeting environmental constraints are issues of paramount importance in the area of process systems and control engineering, and are ideally achieved while maximizing economic profit. It has long been argued that process safety is fundamentally a process control problem, yet few research efforts have been directed toward integrating the rather disparate domains of process safety and process control. Economic model predictive control (EMPC) has attracted significant attention recently due to its ability to optimize process operation accounting directly for process economics considerations. However, there is very limited work on the problem of integrating safety considerations in EMPC to ensure simultaneous safe operation and maximization of process profit. Motivated by the above considerations, this work develops three EMPC schemes that adjust in real‐time the size of the safety sets in which the process state should reside to ensure safe process operation and feedback control of the process state while optimizing economics via time‐varying process operation. Recursive feasibility and closed‐loop stability are established for a sufficiently small EMPC sampling period. The proposed schemes, which effectively integrate feedback control, process economics, and safety considerations, are demonstrated with a chemical process example. © 2016 American Institute of Chemical Engineers AIChE J, 62: 2391–2409, 2016 相似文献
14.
15.
Matthew Ellis Panagiotis D. Christofides 《American Institute of Chemical Engineers》2014,60(9):3230-3242
Economic model predictive control (EMPC) is a feedback control method that dictates a potentially dynamic (time‐varying) operating policy to optimize the process economics. The objective function used in the EMPC system may be a general nonlinear function that describes the process/system economics. As this function is not derived on the sole basis of classical control considerations (stabilization, tracking, and optimal control action calculation) but rather on the basis of economics, selecting the appropriate control configuration, and quantifying the influence of a given input on an economic cost is an important task for the proper design and computational efficiency of an EMPC scheme. Owing to these considerations, an input selection methodology for EMPC is proposed which utilizes the relative degree and the sensitivity of the economic cost with respect to an input to identify and select stabilizing manipulated inputs with the most dynamic and steady‐state influence on the economic cost function to be assigned to EMPC. Other considerations for input selection for EMPC are also discussed and integrated into a proposed input selection methodology for EMPC. The control configuration selection method for EMPC is demonstrated using a chemical process example. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3230–3242, 2014 相似文献
16.
介绍莱铜热处理炉过程控制系统,其基于拥有自主知识产权的过程控制开发平台,采用有限差分模型预报炉内铜板加热过程,实现了热处理计划管理、工艺参数设定、钢板温度跟踪、加热过程动态控制、生产数据统计等功能。 相似文献
17.
Harold Tillmans 《Fuel》1985,64(9):1197-1203
An overview is presented of the many factors which influence the process of carbonization of pitch and hence the properties of pitch cokes. The controlling factors include type of starting material, the industrial process of carbonization, the role of quinoline-insoluble material and carbonization conditions. Several coke parameters are studied and related to the carbonization process by multiple regression analysis. Kinetic data are presented together with a schematic model of coke formation. 相似文献
18.
焦炉加热过程模糊复合智能控制系统模型研究 总被引:4,自引:3,他引:1
采用"间歇加热控制"与加热煤气流量调节相结合的控制原理,利用模糊复合控制建立焦炉加热智能控制策略和模型.该控制策略采用前馈、反馈和模糊智能控制相结合,并应用结焦指数CI控制焦炉的炼焦过程.根据智能控制策略,设计了焦炉加热模糊智能控制的结构和模型.根据实际需要和人工经验,设计了焦炉加热的模糊控制器.仿真结果表明该系统能够稳定焦炉的炉温,具有很大的实用价值. 相似文献
19.
对石灰颗粒,单个煤球的碳化过程,以新观点解释了煤球碳化机理,研究了成型压力与煤球质量、碳化速率及预干燥的关系。提出低压成型,高料层低温碳化及后补强期的新工艺。 相似文献
20.
润滑油优化调合系统的开发与应用 总被引:2,自引:0,他引:2
在介绍润滑油调合工艺的基础上,采用全局优化控制的思想,构建了润滑油调合控制系统.系统搭建了先进控制平台,在该平台上对调合过程进行优化,并对罐区进行管理,从而对底层的控制实施指导.目前该系统已成功应用于某石化企业润滑油调合装置技术改造项目. 相似文献