Characteristics Analysis of Blending Combustion Component of the Guangxi Urban Sludge

Abstract:

The research was the character of the urban sludge burning with coal by using the elemental anaylsis, component analysis, proximate analysis and thermogravimetric analysis. There is a big different elemental composition between the urban sludge and coal. For example, the carbon content (20.64%) in the sludge is only 31.3% of the coal. SiO₂ in sludge incineration ash contain up to 15%, the same as SiO₂ in Siliceous clinker. The sludge ash content (56.46%) is 2 times of in coal ash, an_{Subscript text}d the volatile of sludge (34.6377%)is higher than the volatile of coal (25.089%), the sludge incineration can be divided into three stages: moisture volatilizing stage (30°C to 160°C), devolatilization combustion stage (160°C to 500°C) and fixed carbon and residual combustibles burning stage (510°C to 950°C). The heating rate increased, the volatiles volatilized advance about 50°C. Therefore, the sludge is a high value fuel, which can be used in the burning with coal or building materials.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 1669-1674
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.1669
• Online since: February 2013
• Authors: Long Hui Yang, Ping Xian, Hong Bin Yang, Xiao Ping Li, Ming Tang, Xi Liu
• Keywords: Combustion Characteristic, Sewage Treatment, Sludge

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