Optimize The Set Sintering Ignition Combustion Intelligent Control Method Based On The Ignition Strength

Sinter ignition is an important working procedure of the sintering process, which has direct influence on the heat status of the sintering process, and finally affects the quality of sinter mine and the energy consumption of sintering.Ignition strength is influenced by a series of ingredient parameters and operational parameters such as the ingredient of the blending, the percent of the carbon and sinter strand velocity. The optimized ignition strength set point can be obtained by analyzing the above parameters. Establishing advanced ignition temperature controller and optimizing the air/fuel ratio based on the optimized ignition strength set point is essential to the quality of the sinter mine and the energy consumption of sintering.To get the optimized set point of the ignition strength, firstly, the predictive models of the quality and energy consumption are established based on neural network, then, under the constrained condition of ignition temperature, an improved particle swarm algorithm is proposed to achieve the synthetical optimal aim of the sinter mine quality and sinter energy consumption.Based on the optimized set point of the ignition temperature, an improved ignition temperature fuzzy controller is designed, and the fuzzy control rules which contains the self amending parameters are established, which can effectively improve the precision and robustness of temperature control. To avoid the influence caused by the fluctuate of the fuel heating value and pressure, an self-optimizing method for the air/fuel ratio is developed by use of fuzzy control technique, moreover, the variable step size optimizing strategy is adopted to improve the constringency velocity and the control precision.The simulation results based on the practice produce data illustrate the effectiveness of the optimization control methods proposed for sinter ignition. The improved particle swarm algorithm can achieve the synthetical optimal aim of the sinter mine quality and energy consumption, and get the optimized set point of the ignition strength. Compared to the traditional PID control method for sinter ignition, the improved ignition temperature fuzzy controller and the self-optimizing strategy for the air/fuel ratio has much shorter rise time and regulating time, and smaller overshoot, which can precisely run after the set point of the ignition temperature.