The Energy Optimization And Control Study On The Reaction Distillation Synthesis Of Methyl Tert-amyl Ether

Based on the engineering background of the etherification reaction distillationfor methyl tert amyl ether(TAME),the relevance theory between the product qualityor the energy consumption and key control parameters of the etherification reactiondistillation were studied for methyl tert amyl ether(TAME),the control strategy andcontrol system for process parameters,product quality and energy consumption in thereaction distillation were established,and,the key technology for high efficiency heatintegration technology of etherification reaction distillation process was put forwardby means of the process optimization and the efficiency heat integrationtechnology,which provides the technical support for process optimization,control andenergy reductionin the etherification reaction distillation.The main researchconclusions are as follows:The flow diagram for reaction distillation synthesis of methyl tert amyl ether(TAME) was established by Aspen Plus software,and study the influence of processparameters on the product purity,yield and the energy consumption for the system,theparameters include：reflux ratio,ratio of reboiler,the flows rate for C5-FEED,MEOH-Fand MEOH-S,the prereactor temperature.the optimal process parameters combinationwas obtained which ensures high product quality and low of energy consumption forreaction distillation process system.Contrasting analysie shows the energyconsumption of the etherification reaction distillation process was reduced from theenergy consumption of35533.78kw without optimization to the energy consumptionof31836.18kw with optimization,The optimization process can make saving energyefficiency increase10.4%for the etherification reaction distillation process.Through the analysis of the sensitivity of the reaction distillation process underthe optimal parameter combination,The key control parameters to the energyconsumption and product qualitywe were cleared,such as the flows rate forC5-FEED,MEOH-F and MEOH-S,the temperature and liquid level for prereactor thereaction distillation temperature and the liquid level for reboiler and condense inreaction distillation column.The relevance theory between product quality or energy consumption and process parameters were establish,the PID control scheme andcontrol strategy of product quality or energy consumption were established bycontrolling the key process parameters.The influences of process parametersdisturbance on the controlling behaviour of the product quality and energyconsumption were studied by Aspen Plus dynamics simulation,and show that thiscontrol system can effectively achieve the ideal technological parameters,productyield and purity and the energy consumption for the system,and the control system inthis paper has good ani-interference performance.Through the analysis of the energy consumption in eaction distillation process,anew heat integration technology was put forward which can efficiently utilize the heatfrom the condenser to preheat the steam C5-FEED,MEOH-F and MEOH-S,theenergy consumption was further reduced from the energy consumption of31836.18kw in Optimal conditions to the energy consumption of28780.9kw in heatintegration condition,The heat integration process can make saving energy efficiencyincrease9.6%,the process parameters optimization and the heat integration can makethe total energy saving efficiency increased high19%,which has obvious economicbenefits in saving energy.The control strategy and control scheme for heat integration were put forward,and of heat integration controling system was studied by Aspen Plus dynamicssimulation.Research results show the control system can effectively achieve the idealtechnological parameters,product yield and purity and the energy consumption forheat integration process,has well the anti-interference control performance,and meetsthe control technology requirements of the new heat integration etherification reactiondistillation process.