Тип публикации: статья из журнала
Год издания: 2022
Идентификатор DOI: 10.1134/S0040601522040012
Ключевые слова: calculation zones, combustion modes, computer simulator, furnace, mathematical model, optimization of furnace processes
Аннотация: Abstract: An approach to simulating and controlling a pulverized coal furnace with taking into account the fuel combustion and complex heat transfer processes is considered. A distinguishing feature of the methodical approach presented in the article is that individual calculated zones are separated in the furnace chamber accordingПоказать полностьюto their functional features and physicochemical homogeneiity, and also that it is possible to take into account the reaction characteristics of individual thermochemical conversion processes and, hence, the quality of fuel combusted. The procedure of dividing the furnace chamber into zones is based on using the theoretical model of a flow-type reactor with ideal mixing without heat removal through the wall with taking into account kinetic resistance to combustion. The model assumes zero gradients of both fuel and oxidizer concentrations, due to which there is no diffusion resistance to combustion. The mathematical description of the modeled equipment local areas, which are dynamically divided in the vertical and horizontal directions into sequential chains of volume and surface zones, is given in the class of ordinary differential equations with retaining all essential features of the process, such as multiplicity of stationary states and critical levels of furnace volume calorific intensity corresponding to flame failures. The mathematical model and comparative computation results for a few furnaces in combusting different kinds of coal are given. Based on the proposed analysis procedure, a dynamic computer simulator for perfecting the working processes running in steam boiler furnace devices (a training simulator) has been developed. By using this simulator, the thermal power plant (TPP) personnel can be trained to perform operative control of furnace process in the boiler unit with the possibility of changing the state of auxiliary equipment and operating parameters of the unit as a whole and of its individual functional groups. © 2022, Pleiades Publishing, Inc.
Журнал: Thermal Engineering
Выпуск журнала: Vol. 69, Is. 4
Номера страниц: 302-312
ISSN журнала: 00406015
Издатель: Pleiades journals