Numerical analysis of the burning of pulverized coal with different thermal properties in the furnace of a BKZ-420-140-2 boiler

Abstract

Results are presented from numerical simulations of mass-transfer and combustion processes in the furnace of a BKZ-420-140-2 boiler using the applied program package FIRE 3D with replacement of the design Ékibastuz coal by Kuznetsk grade D hard coal and Irsha-Borodino grade 2B lignite.

Research of integral parameters for furnaces of a circulating fluidized bed

“…It is assumed here that the behavior of each group of particles may be characterized by the behavior of its representative -the trial single marker particle. That is the properties, which has the marker particle at the present moment of time, are extended for all particles of the group, which are represented by the marker particle [3][4][5].…”

“…Figure 1 presents the results of a numerical calculation model of the boiler furnace with circulating fluidized bed using a software package FIRE 3D [3,4,6]. In the lower part of the furnace there are maximum values of the velocities.…”

Study of in-furnace gas-dynamic processes with different design of vortex burners

“…In this regard, in the boiler unit there are such negative processes as abrasive wear of the heating surfaces, and in the case of a significant change in the content of the mineral part of the fuel, the instability of the combustion process is observed. It is also possible to distinguish a sufficiently high generation of nitrogen oxides, since vortex burner devices are used in the organization of burning of Ekibastuz coal [1,2].…”

Numerical research of heat transfer in gas heat exchanger

“…The literature presents a broad description of analytical methods for solving problems of heat and mass transfer in a variety of heat exchangers [1][2][3]. To solve the problems, and presenting the results in the entire volume of investigation the most effective use of numerical simulation techniques [4,5].…”