Study On Optimization Of New Integrated Separation Process Of Azeotropic System Based On Genetic Programming

In chemical production,the traditional method of azeotropic separation has the disadvantages of high energy consumption and easy to pollute,so it is of great significance to explore a new separation process of energy saving and environmental protection.With the emergence of new pervaporation membrane materials,it is possible to establish the distillation membrane separation integrated process.On the basis of previous work,a set of comprehensive solution strategy of new distillation membrane separation integrated process based on genetic programming（GP）is established in this paper,which can quickly and accurately solve the optimal distillation membrane separation integrated process for different characteristics of a variety of azeotropic systems.In this paper,a new comprehensive solution strategy with wide applicability is established.After matching one or several kinds of pervaporation membranes which are reasonable and feasible according to the separation requirements,it can quickly and accurately solve the optimal equipment and operation parameters of the corresponding distillation membrane separation optimal integrated process,and discuss the membrane.In this paper,a typical industrial case,iso-propanol water azeotropic system,is calculated by using the new GP comprehensive solution strategy.Select the industrial hydrophilic Pervap?2510 membrane,and then the influence of carbon dioxide emission cost on the application of distillation membrane separation integration process in chemical enterprises was discussed.When the trading price of carbon dioxide is 60￥/T,the optimal integration process is D-PV structure,which requires the smallest membrane area.In order to expand the application scope of GP comprehensive solution strategy,so that it can predict the industrial application prospect and modification direction of membrane which is still in the experimental research stage.In this paper,a set of membrane cost prediction and evaluation method is proposed based on the upper limit price(P_max)of theoretical prediction per unit membrane area.The evaluation method is used to calculate benzene cyclohexane system and methanol toluene azeotrope system.In the calculation example of benzene cyclohexane system,the waterborne polyurethane membrane and GO-AgNPs/PI hybrid membrane were selected for optimization calculation.The results of hybrid membrane calculation show that the availability of hybrid membrane with two kinds of metal particle concentration will be reduced to some extent by the increase of feed flow rate and benzene content.When the feed flow rate increased,the hybrid film with high concentration of metal particles was better;when the benzene content increased,the hybrid film with low concentration of metal particles was better.In the calculation of waterborne polyurethane membrane,the application price of waterborne polyurethane membrane is predicted theoretically,and the conclusion that higher Pmax can be obtained by increasing the flux of the membrane is revealed,which indicates the direction for the modification of this kind of membrane.For the methanol toluene azeotropic system,take the chitosan membrane which highlights the green environmental protection characteristic but is still in the experimental research stage as an example.By comparing the cost changes of the integration process between the single performance chitosan membrane and the mixed use of two different performance chitosan membranes,it is found that the cost of the integration process of the mixed use of two chitosan membranes is lower.In the future,we can continue to explore the use of a variety of different materials.The influence of the mixture and sharing of material and membrane on the integrated distillation membrane separation process.The comprehensive solution strategy of new distillation membrane separation integrated process based on genetic programming proposed in this paper has wide applicability and scalability.It can match all kinds of membrane types and materials for all kinds of azeotropic system separation,and can flexibly optimize various optimization objectives by matching a variety of fitness calculation methods,so as to provide reliable theoretical basis for the wide application of distillation membrane separation integration process.