Real Time Optimization System Rebuilding And Model Study Of Low-Temperature Styrene And Butadiene Emulsion Polymerization

Real time optimization system of process industry is built in this paper, and is applied to low-temperature styrene and butadiene emulsion polymerization. As information platform for innovation, this system is the embodiment of Computer Integrated Process System (CIPS), and can largely promote the development of management modernization and informatization of corporation.To solve the information transmission bottleneck problem of traditional real time optimization, real time optimization is integrated with Management Information System (MIS) to form real time optimization system. This system can not only collect production information inside and outside corporation, but also provide the newest product and material prices for optimization to ensure that it can regulate operational parameters with reference to market information always. This system favors not only real time optimization but also management of corporation.Real time optimization has been deeply used in production reconstruction for a long time, so its theory and method are also fully developed. But because the data which optimization needs are not well in quantity and quality, the actual effect of optimization is not satisfied by now. To solve these problems above, simulation of analytical instruments is put forward in this paper, based on the research of traditional data collection and correction of real time optimization. With this approach, those data which are not able to or can't bee easily measured can bee given readily, acting as soft sensors. So, together with present data correction technology, this approach can entirely meet the input data requirement of real time optimization.Having been provided with complete and accurate data, traditional real time optimization system will still need to determine steady state to start optimizing. After it finishes computing, it needs to determine steady state once again. All those things above directly result in such disadvantages of traditional real time optimization as bad stability and low computation speed. Absorbing dynamic model, dynamic real time optimization is brought out in this paper, which can promote the practice effect of real time optimization largely. In practice it need not to determine steady state any more, but only to analyze locale history data and correct the parameters of the dynamic model. Then a set of steady solutions is gained from the dynamic model to update the steady state model. It isjust now that the optimization begins, and the results verified are then sent to advanced control system.There are many factors that can affect synthetic rubber production. Because of the deep couple degree among these variables, it is very difficult to operate only on experiences. So the simulation and optimization of synthetic rubber is still one of the most difficult problems in chemical industry. Low-temperature styrene and butadiene emulsion polymerization is the main product of synthetic rubber, used widely in society. Additionally it also the typical representation of emulsion polymerization which is commonly applied as the most advanced polymerization method, so it is selected as the verification example for real time optimization system in this paper to facilitate the generalization of real time optimization.The base of real time optimization system is model, and polymerization reactor is the main and key equipment of low-temperature styrene and butadiene emulsion polymerization, so this paper describes the polymerization reactor models. As another type of important polymerization reactor besides polymerization kettle, the displacement column model is yet never seen in literatures. Approximated as a series of polymerization kettles the displacement column model is built in this paper, forming the total polymerization unit model with polymerization kettle model. In fact, the displacement column model realizes the simulationand optimization of low-temperature styrene and butadiene emulsion polymerization.In practice, optimization in real time optimization uses high fract...