Citation: YIN Li-bao, DENG Chang-ya, ZHANG Cheng, FANG Qing-yan, XU Qi-sheng, CHEN Gang. Fusion characteristics in co-combustion of coal with industrial and municipal sludge[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(9): 1068-1076. shu

Fusion characteristics in co-combustion of coal with industrial and municipal sludge

1.
1. Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China;

Corresponding author: ZHANG Cheng,
Received Date: 30 April 2014
Available Online: 5 July 2014
Fund Project: 国家自然科学基金(51006042) (51006042)广东省省部产学研重点项目(2012B091000166) (2012B091000166)华中科技大学自主创新基金(2013QN082)。 (2013QN082)

The ash fusion characteristics of coal mixed with different kinds of sludge were investigated. Mineral ternary phase diagram and XRD analysis were used to identify interaction mechanism of different mineral components and transformation of ash melting characteristics during burning of coal with municipal and industrial sludge. The results show that ternary phase diagram can effectively predict the variation of ash melting temperature for co-combustion of coal and sludge. When the content of iron oxide is low, the formation of eutectic, diopside and anorthite can reduce the ash fusion temperature. Monticellite, mullite and monomer form of iron oxide improve the ash fusion temperature. The sulfur in municipal sludge easily forms low temperature eutectic of sulfate. The influence of phosphorus on the ash fusion temperature is related to the ratio of alumina and alkali. When the alumina is dominant, phosphorus will reduce the ash fusion temperature. When the alkali is primary, phosphorus will raise the ash fusion temperature.
- sludge,
- co-combustion,
- ash fusion temperature,
- phosphorus,
- sulfur
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