Assessment of Atomization Quality with Respect to Burnout for the Incineration of Organically Contaminated Waste Waters
作者:
K. Ehrhardt,
A. Kufferath,
W. Leuckel,
期刊:
Combustion Science and Technology
(Taylor Available online 1998)
卷期:
Volume 136,
issue 1-6
页码: 333-347
ISSN:0010-2202
年代: 1998
DOI:10.1080/00102209808924176
出版商: Taylor & Francis Group
关键词: Incineration;burnout;evaporation;air-assist atomization;spray characteristics
数据来源: Taylor
摘要:
Three different air-assist nozzles were investigated with a Phase-Doppler-Analyzer and high speed photography in a cold environment and then used in a pilot scale furnace at a thermal input of 200 kW. Waste water was simulated by a water-glycol mixture. Measurements showed temperatures above 1100°C and homogeneous oxygen concentrations except close to the burner. With such conditions evaporation and, hence, atomization quality set the limits on burnout, as oxidizing reactions are fast. The Sauter Mean Diameter (SMD) did not correlate closely with burnout since SMD indicates a mean droplet size while performance is limited by the number oflarge droplets present. Betteragreement was achieved for D90%. which is a parameter that represents the upper end of the size distribution. High speed photography is recommended to detect and measure the largest droplets in the spray. Their size correlated closely with the onset of incomplete burnout and is, therefore, an appropriate parameter to characterize atomization quality with respect to burnout.
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