Design And Analysis Of Tolueze Exchangers

Heat exchanger is one of the most important equipment in the petrochemical industry,which accounts for 40% of the whole device.The tube shell heat exchanger has the advantages of simple structure,easy fabrication,and the dominant position in many heat exchangers.Can improve the heat transfer performance,the annual savings of considerable energy savings.Also,it is commom that shell and tube heat exchangers were used in the boiler waste heat utilization project.This paper uses Aspen EDR software which is used in industry to design toluene cooler.By the designing module of Aspen EDR,we simulate the physical properties of the toluene and water,and judge the physical state of the two groups of fluid in the process conditions.Then,we adjust the structure of the heat exchanger on the basis of the original design,and observe the effect of the structure size of the device on the heat transfer process.We ensure the minimum heat transfer area margin and control the thermal and cold side heat resistance and keep them balance,to achieve the optimization designing of heat exchangers.We revealed the influence of physical parameters and structure parameters on heat transfer calculation.And analysis of these effects,the method of selecting the process parameters in the design process is obtained.Finally,by establishing the three-dimensional solid model of the device,the CFD simulation software Fluent is used to simulate it.In order to reflect the influence of the number of baffles on the fluid flow and heat transfer in the shell side,the numerical simulation of the state of the four baffles,eight baffles and sixteen baffles is carried out.Finally,the outcome between Aspen EDR and coupling method are far away,the end temperature of coupling calculationend lower than Aspen EDR,and the calculation of Aspen EDR and constant wall temperature calculation results are closed.