American Flame Research Committee

Page 8

Update Item Information
Title Ash Conditioning for Improved ESP Performance
Creator Mozes, M.; Mangal, R.; Thampi, R.
Publisher Digitized by J. Willard Marriott Library, University of Utah
Date 1988
Spatial Coverage presented at Pittsburgh, Pennsylvania
Abstract Ash conditioning studies have been conducted at Ontario Hydro's 640 MJ/h combustion research facility to reduce high ash resistivities and improve ESP collection efficiencies when burning a low sulphur western Canadian (Luscar) coal, a western Canadian-US coal blend with limestone injection and a low sulphur eastern US coal. The Luscar coal produced a stable flame and carbon burnout was 99.9% Ash resistivities measured in situ ranged between 2.7 x 10^10 to 1.4 x 10^11 ohm.cm. The pilot precipitator performed only with 79% efficiency . S03 conditioning of the Luscar coal ash with 50 ppm S03 decreased the resistivity by 0.7 to 1 order of magnitude and improved the collection efficiency of the ESP. Conditioning the waste from the western Canadian US coal blend during limestone injection was carried out using both S03 and water. Injection of about 60 ppm S03 vapour into the flue gas to condition the limestone injection waste reduced the resistivity by up to 3 orders of magnitude. Humidification of the waste lowered ash resistivity from 2.8 x 10^11 to 1.8 x 10^8 ohm.cm. In both cases ash collection efficiency of the precipitator increased. Injecting a proprietary chemical to condition the ash from a 1.1% S eastern US coal had no effect on the ash resistivity but improved the cohesiveness of the ash causing a slight improvement in ESP performance.
Type Text
Format application/pdf
Language eng
Rights This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
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/s6833vmk
Setname uu_afrc
ID 4927
Reference URL https://collections.lib.utah.edu/ark:/87278/s6833vmk

Page Metadata

Title Page 8
Format application/pdf
OCR Text Show
Setname uu_afrc
ID 4917
Reference URL https://collections.lib.utah.edu/ark:/87278/s6833vmk/4917