Automatic Flare Control Based on the Mathematical Model of Ignition of the Initial Section of Combustion

摘要

The paper presents a new mathematical model of the processes of aeromechanics and heat transfer in the initial section of the heterogeneous flare continuum, which to a large extent form the efficiency of the fuel utilization processes in the boiler unit. An analytical description of the processes of volatile substances release as a function of temperature, which is associated with the heating of particles of fuel dust, is given, ignition of a mixture of air with volatile substances is considered in two aspects - at a known temperature and the known lower concentration limit of ignition of the mixture. It is shown that both approaches give similar results in determining the initial section of the flare. To generate the reliability of the model, the known experimental data are obtained on the determination of the concentration limits of ignition of a mixture of air with volatile substances of the fuel, the time before the ignition of the mixture and other data. The convergence of experimental data and the numerically obtained ones confirms the reliability of the proposed mathematical model and the reliability of calculations for it to determine the main characteristics of the flare in the zone of intense combustion of boiler units. The control of the parameters of the flame in the initial section is possible when using the developed mathematical model of the ignition process. In addition, the construction of neural networks based on the model is proposed, for example, the possibility of using the two-layer neural network of Kosco is shown.