Abstract
A method for evaluating the thermophysical characteristics of the torch is developed. Mathematically the temperature at the end of the zone of active combustion based on continuous distribution functions of particles of solid fuels, in particular coal dust. The particles have different average sizes, which are usually grouped and expressed as a fraction of the total mass of the fuel. The authors suggest taking into account the sequential nature of the entry into the chemical reactions of combustion of particles of different masses. In addition, for the application of the developed methodology, it is necessary to divide the furnace volume into zones and sections. In particular, the initial section of the torch, the zone of intense burning and the zone of afterburning. In this case, taking into account all the thermophysical characteristics of the torch, it is possible to make a thermal balance of the zone of intense burning. Then determines the rate of expiration of the fuel-air mixture, the time of combustion of particles of different masses and the temperature at the end of the zone of intensive combustion. The temperature of the torch, the speed of flame propagation, and the degree of particle burnout must be controlled. The authors propose an algorithm for controlling the thermophysical properties of the torch based on neural network algorithms. The system collects data for a certain time, transmits the information to the server. The data is processed and a forecast is made using neural network algorithms regarding the combustion modes. This allows to increase the reliability and efficiency of the combustion process. The authors present experimental data and compare them with the data of the analytical calculation. In addition, data for certain modes are given, taking into account the system’s operation based on neural network algorithms.
Highlights
IntroductionOperation of Solid Fuel Steam Generators with Different Characteristics
The properties of the fuel agent entering the boiler units of the thermal power plant (TPP) are constantly changing, which often leads to different burning conditions
The temperature at the end of the intense combustion zone is mathematically determined based on the continuous distribution function of solid fuel particles, in particular, coal dust
Summary
Operation of Solid Fuel Steam Generators with Different Characteristics. To ensure uninterrupted generation of heat and electricity, coal of various grades and different thermal characteristics can be used at thermal power plants. Even the characteristics of coal produced in a single field will vary depending on the specific coal seam. It should be noted that the thermal properties of coal vary depending on the conditions of transportation and storage. The properties of the fuel agent entering the boiler units of the thermal power plant (TPP) are constantly changing, which often leads to different burning conditions. In the most general case, the burn-up time of fuel particles varies, which leads to an increase or decrease in the length of the flare, physical underburning, slagging of the heating surfaces, and heat losses with flue gases
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