Dynamic Simulation Of Cumene Oxidation System And Steady-State Simulation Of Reactors For Cumene Oxidation

The first topic of this paper is the dynamic simulation of cumene oxidation system. The cumene oxidation system mainly consists of oxidation reactors, concentration towers, decomposition reactors, neutralization reactor and some other simple units. The process of oxidation, concentration, decomposition and neutralization separately investigated. After that, system model are established and the suitable solution way is selected. Dynamic simulation system finally formed is used to the real time simulation and practical process, which obtain the good effect.After establishment of the above-mentioned model, we have discussed the results of stable simulation. The results of the model have approached the practical data, reflected the basic principles of cumene oxidation system and can be applied to the simulation of the technical process. As a whole process of technology simulation, The whole simulation process is good to reflect the running conditions of equipment. The simulation results can be used not only for the simulating training but also for the technology upgrade and control system study. This research has successfully applied in the systemic analysis on the chemical division of Yanshan Petrochemical Corporation.The second topic is the steady-state simulation of four-serial bubble reactors of the oxidation process. The reaction mechanism of cumene oxidation is analyzed, the kinetic equations of cumene oxidation and its primary assistant reactions are educed. In the condition of reasonable suppose, a mathematic model of reactors for cumene oxidation is set up at the same time. On this condition, the steady-state simulation of four-serial bubble reactors of the oxidation process is made, and the kinetic model is corrected. The corrected result can describe accurately the operation status in the reactors. The mathematic model of the reactors can be used to optimize the operation and guidance the design and magnifying of the reactors.At the basis of the corrected kinetic model of cumene oxidation and the mathematic model of bubble reactors which have been set up, the simulation of the reactors for oxidation of cumene by gas-liquid two phase reaction with different operating conditions of different recycling quantity and different place recycling and with different reactors of non-equal volume four-serial bubble reactors and ideal stirred tank reactor is made. The advantages and the disadvantages of different operating conditions and different reactors have been analyzed. The following results have been gained:(1) Moving the uppermost recycling place to the top of the oxidation towers and averaging the three recycling quantity are in favor of improve the yield of CHP.(2) The appropriate quantity of CHP in the raw material is able to quicken the reaction velocity and improve the yield of CHP.(3) Aiming at the four-serial non-equal volume bubble reactors, that the bigger reactors are front is better than that the lesser reactors are font, which can improve the product of CHP. Therefore, the account of volume optimization should be made for several-series reactors.(4) The result comparison of simulation for ideal stirred tank reactor and bubble reactor with equal volume shows that the former is better than the latter for the yield of CHP. As a result, on condition that the product is same, the ideal stirred tank reactor can reduce the temperature of reaction and cut down the happen of the assistant reactions. The result is significant for the choice of different kinds of reactors.The above conclusion can be used to guide the reconstruction and optimization of the reactors of cumeme oxidation.