Slurry Combustion Using an Ultrasonic Burner

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Title Slurry Combustion Using an Ultrasonic Burner
Creator Yin, C. F.; Bormann, H.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1982
Spatial Coverage presented at Newport Beach, California
Abstract A slurry combustion system incorporating a burner with ultrasonic atomizing nozzle is developed. Successful tests were made in the full scale operation of a rotary kiln and a process steam boiler where 60/40 coal-oil mixture and other very viscous fuels were burned. The heart of this system is the DUMAG burner with an ultrasonic atomizing nozzle, where an ultrasonic field is generated by compressed air or steam through a ring-shaped resonance chamber. Fine atomization can be achieved for viscous liquid or solid/liquid mixtures. The fuels exit from the nozzle through a large opening so that clogging and erosion can be prevented. The burner is also capable of burning low BTU liquid with supplemental oil or gas. Operating tests showed that for complete coal-oil mixture (COM) combustion, coal particles of less than 100 m are necessary. A wet-grinding system was used in the preparation of the COM to minimize the problems of explosion and segregation. The mill is a grinding, mixing, and pumping device in one unit which prepares the slurry only as required. This system is applicable to the conversion of existing oil-firing combustion systems into firing slurries without high investment cost or sacrificing the capacity of the installation.
Type Text
Format application/pdf
Language eng
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Conversion Specifications Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician Cliodhna Davis
ARK ark:/87278/s6wh2sj6
Setname uu_afrc
ID 2650
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