Numerical Simulation Of Temperature Distribution In The Combustion Process Of Pulverized Coal

With the increasing attention paid to the present environment,it is necessary to reconstruct the coal storage silo properly,which can not only greatly improve the coal storage capacity of primary coal supply,but also ensure the safety of the whole coal storage silo.The self-ignition of pulverized coal is mainly caused by the heat storage capacity inside the silo and some air will enter into the silo,which will cause the flammable environment It is difficult to predict the pulverized coal in the early stage of self-ignition.Therefore,this paper introduces various technologies for measuring the internal temperature of pulverized coal,as well as the various processes experienced in the process of self-ignition of pulverized coal.It focuses on the characteristics of each stage of the process of self-ignition of pulverized coal.In order to prevent the selfignition of pulverized coal,it also introduces various technologies inside the pulverized coal.Secondly,it is more important to know the distribution of temperature field in the process of pulverized coal combustion in order to ensure the normal operation of the pulverized coal tube.Only by knowing the distribution of temperature field in the pulverized coal tube can we find the location of the combustible point of pulverized coal in a better and more timely manner.Using ANSYS numerical simulation software,In order to ensure the accuracy of the simulation results,various boundary conditions are defined by the parameters of a practical silo.By arranging different measuring points in the coal drum,the temperature field around different measuring points and the distribution of gas concentration are found.By simulation,it is found that the closer the measuring point is to the heat source,the faster the temperature propagation speed is,the less the temperature change rate of the measuring point is to the far from the heat source.Secondly,it is found that the measuring point located at the high level The temperature of the measuring point changes faster than that of the low position,mainly due to the existence of air leakage.The results of numerical simulation provide theoretical guidance for the location of measuring points in the coal storage barrel of thermal power plant.Finally,by comparing the position of the flammable point and the temperature change around each measuring point,it is found that when the pulverized coal in the pulverized coal tube is self-ignited,the temperature change rate rises first and then decreases.Therefore,when the pulverized coal in the pulverized coal tube is self-ignited,the approximate position of the ignition point in the coal tube can be determined according to the large sensing distance,so as to take fire-fighting measures in time Theoretical support for safe operation improvement of coal-fired power plants.