Matematické modelování spalování na roštu: problematika provázání modelů lože a komory

Mathematical Modelling of Grate Combustion: Bed and Freeboard Coupling Issues

journal article - other

en

This paper is focused on issues related to coupling of a fuel bed model with the freeboard as one of methods to simulate solid fuel combustion in grate furnaces. There are several problems, that have to be dealt with, when applying the coupled methodology, however previously not discussed in detail in literature. Topics, that are addressed, include the way of coupling, especially placement and discretization properties of the interface between the two computational models within the overall furnace model. As the bed model plays key role in this modeling approach, capabilities of existing models are reviewed. The emphasis is put on those features and problems that are not sufficiently solved in order to yield general and reliable model. One of these features is prediction of release of minor biomass and municipal solid waste constituents such as K, Cl, S and heavy metal elements as they are closely related to pollutant emissions formation and deposition, corrosion and erosion problems.

Článek pojednává o problematice propojení samostatných modelů lože a zbytku spalovací komory jakožto specifické metodě numerické simulace spalování tuhých paliv v roštových kotlech. Mezi diskutovaná témata patří technika propojení modelů a současné možnosti modelů spalování v loži spolu s těmi rysy, které naopak nejsou dostatečně řešené. Mezi ně patří např. predikce uvolňování minoritních složek z paliva jako K, Cl, S a prvky těžkých kovů.

This paper is focused on issues related to coupling of a fuel bed model with the freeboard as one of methods to simulate solid fuel combustion in grate furnaces. There are several problems, that have to be dealt with, when applying the coupled methodology, however previously not discussed in detail in literature. Topics, that are addressed, include the way of coupling, especially placement and discretization properties of the interface between the two computational models within the overall furnace model. As the bed model plays key role in this modeling approach, capabilities of existing models are reviewed. The emphasis is put on those features and problems that are not sufficiently solved in order to yield general and reliable model. One of these features is prediction of release of minor biomass and municipal solid waste constituents such as K, Cl, S and heavy metal elements as they are closely related to pollutant emissions formation and deposition, corrosion and erosion problems.

roštové spalování, modelování, provázané modely, simulace, model lože, model spalovací komory

grate combustion, modelling, coupled simulation, bed model, freeboard

2013

29.09.2013

AIDIC Servizi S.r.l.

Milano, Italy

1974-9791

35

1

985–990

6