Ash deposit characterisation in a large-scale municipal waste-to-energy incineration plant
Journal article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Phongphiphat A., Ryu C., Finney K.N., Sharifi V.N., Swithenbank J.
Publisher: Elsevier
Publication year: 2011
Journal: Journal of Hazardous Materials (0304-3894)
Volume number: 186
Issue number: 1
Start page: 218
End page: 226
Number of pages: 9
ISSN: 0304-3894
eISSN: 1873-3336
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
The deposition of ash - combustion residues - on superheaters and heat exchanger surfaces reduce their efficiency; this phenomenon was investigated for a large-scale waste-to-energy incineration facility. Over a period of six months, ash samples were collected from the plant, which included the bottom ash and deposits from the superheater, as well as flyash from the convective heat exchanger, the economiser and fabric filters. These were analysed for particle size, unburned carbon, elemental composition and surface morphology. Element partitioning was evident in the different combustion residues, as volatile metals, such as cadmium, antimony and arsenic, were found to be depleted in the bottom ash by the high combustion temperatures (1000+ฐC) and concentrated/enriched in the fabric filter ash (transferred by evaporation). Non-volatile elements by contrast were distributed equally in all locations (transported by particle entrainment). The heat exchanger deposits and fabric filter ash had elevated levels of alkali metals. 82% of flyash particles from the fabric filter were in the submicron range. ฉ 2010 Elsevier B.V.
Keywords
Fabric filter ash, Municipal solid waste incineration, Superheater deposits, Volatile/non-volatile metals
Contact Information