Detailed investigation of a pulverized fuel swirl flame in CO{sub 2}/O{sub 2} atmosphere

Journal Article · Mon Dec 15 00:00:00 EST 2008 · Combustion and Flame

DOI:https://doi.org/10.1016/J.COMBUSTFLAME.2008.05.008· OSTI ID:21125485

Toporov, D; Bocian, P; Heil, P; Kellermann, A; Stadler, H; Tschunko, S; Foerster, M; Kneer, R ^[1]

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1. Institute of Heat and Mass Transfer, RWTH Aachen University, Eilfschornsteinstrasse 18, D-52056 Aachen (Germany)

A novel approach to oxycoal flame stabilization has been developed at the Institute of Heat and Mass Transfer at RWTH Aachen University [D. Toporov, M. Foerster, R. Kneer, in: Third Int. Conf. on Clean Coal Technologies for Our Future, Cagliari, Sardinia, Italy, 15-17 May 2007]. The swirl burner design and its operating conditions have been adjusted in order to enforce CO formation thus stabilizing the flame and obtaining a full burnout at levels of O{sub 2} content in the O{sub 2}/CO{sub 2} mixture similar to those in air. The paper presents results of detailed numerical and experimental investigations of a stable oxy-fired pulverized coal swirl flame (type-2) obtained with a 21 vol% O{sub 2} concentration. The combustion tests were performed in a vertical pilot-scale furnace (100 kW{sub th}) in the framework of the OXYCOAL-AC research project aiming to develop a membrane-based oxyfuel process. The experimental results concerning gas velocities, gas and particle temperatures, and gas compositions are presented and discussed, focusing on the underlying mechanisms as well as on the aerodynamics of the oxycoal flame. A comparison between measurements and simulations has shown the validity of the numerical method used. The reported data set can be used for validation of numerical models developed for prediction of oxyfuel combustion. (author)

• OSTI ID: 21125485
• Journal Information: Combustion and Flame, Vol. 155, Issue 4; Other Information: Elsevier Ltd. All rights reserved; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON DIOXIDE
CARBON MONOXIDE
COAL
COMBUSTION
FLAMES
AERODYNAMICS
COMPARATIVE EVALUATIONS
PULVERIZED FUELS
POWER RANGE 10-100 KW
MIXTURES
VALIDATION
MATHEMATICAL MODELS
OPERATION
BURNERS
BURNOUT
DESIGN
CHEMICAL COMPOSITION
MEMBRANES
SIMULATION
STABILIZATION
VELOCITY
OXYFUEL COMBUSTION PROCESS
Swirl flame