Study On Temperature Transfer Model And Temperature Control Method Of Propellant Reactor

Spherical propellant is currently the most widely used in the propellant,and the formation of granules is an important process in the preparation process,because the molding quality determines the finally ballistic properties of the propellant.The temperature of the reactor is an important index in the molding process.In the molding process,solution temperature in the reactor is controlled by regulating the steam valve.But in the production,the relationship between the solution temperature and the steam valve opening is complicated.Based on this problem,this paper presents a PID temperature control method based on the temperature transfer model.By analyzing the temperature transfer method of the solution in the steam heating reactor,the three heat transfer processes of 1 cubic meter and 6 cubic meters respectively were modeled and solved,and the relationship between the solution temperature and the amount of steam required for the current temperature were obtained.Through the analysis of the control accuracy,the type of the steam valve has been selected.The simulation results show that the model is feasible in the reactor capacity of 1 cubic meter and 6 cubic meters by simulating the temperature transfer model and the control method and comparing with the actual measured value.Finally,through making a Labview upper machine software and field debugging,the temperature transfer model and the control method are assessed.In the balling state,the maximum error is 0.24% before the steady-state temperature,and the maximum relative error is 0.13% at steady state.In the pre-steaming stage,the relative error of the heating rate is 1.1% when the solution heated up slowly,and the maximum relative error is 0.16% in steady state.In the dehydration stage,the maximum relative error is 0.15% in the steady state.In the steaming stage,the relative error of the heating rate is 0.3%.The debugging results show that the control scheme has the characteristics of small overshoot and high stability,and the control method can reduce the debug time and the effect of saving steam.