One-dimensional model of heat-recovery, non-recovery coke ovens. Part III: Upper-oven, down-comers and sole-flues. (1st October 2016)

• Record Type: Journal Article
• Authors: Buczynski, Rafal; Weber, Roman; Kim, Ronald; Schwöppe, Patrick
• Is Part Of: Fuel. Volume 181(2016)
• Page Start: 1132
• Page End: 1150
• Publication Date: 2016-10-01
• Subjects: Combustion -- Heat transfer -- Horizontal coke ovens; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2016.01.087
• Languages: English
• ISSNs: 0016-2361

Abstract

Highlights: Raw gas combustion in upper-oven proceeds so that the tars are completely destroyed. Combustion in down-comers and sole-flues is mixing controlled. The paper contains detailed mass and energy balances of a horizontal oven for coke making. Abstract: This paper is Part III of the series (Buczynski et al., 2016) concerning the mathematical modeling of HR/NR coke ovens and it formulates one-dimensional models describing combustion and heat transfer in the space above coking-bed (upper-oven), in down-comers and in sole-flues. The space above a coking-bed is modeled using the well-stirred reactor concept while other oven branches are modeled using the long plug-flow furnace concept. The numerical simulations indicate a slow mixing-controlled combustion of gaseous mixtures in the down-comers and in the sole-flue channels. Such a behavior is typical for industrial coke ovens. Thermal radiation is the main mechanism of heat transfer and it accounts for up to 90% of the overall heat transfer rate. The mathematical model calculates also the refractory temperatures and in some sole-flue branches they approach too high values which may render oven damages.