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Experimental Reasearch of Incineration of Municipal Sewage Sludge in a Circulation Fluidized Bed

Author: JiPeng
Tutor: JiangXiuMin
School: Shanghai Jiaotong University
Course: Thermal Power Engineering
Keywords: Sewage sludge Combustion characteristics Thermal Analysis Pollutant Emission Characteristics Circulating fluidized bed
CLC: X703
Type: Master's thesis
Year: 2009
Downloads: 302
Quote: 1
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Abstract


With the development of urbanization and the rise of urban sewage treatment industry, municipal sewage sludge production increased dramatically, how to deal with the growing sewage sludge as well as they try to eliminate the harm is an important challenge facing humanity, sludge disposal ultimate goal is to achieve volume reduction, stabilization and resources. Sludge fluidized bed incineration officially conform to this trend and developed a promising method of sludge thermal chemical treatment, but the high moisture content of the sludge, low calorific value characteristics affect the feasibility and economics of sludge incineration. Order to better promote sludge incineration technology, we consider the sludge to dry and then burned, semi-dry sludge by sludge drying device drying in a circulating fluidized bed combustion characteristics and pollution The emission characteristics of the research is very necessary. This paper first introduces the sludge source of harm, the main treatment and disposal methods of treatment and disposal of the status quo, and sludge fluidized bed incineration technology research status are reviewed. Determined on the basis of the content of this study. Test semi-dry sludge composition, pyrolysis and combustion characteristics, the basic characteristics of heavy metal elements content and ash melting point, calculated burn index and combustion characteristics of the sludge, Coasts exponential integral method Solving sludge pyrolysis and combustion dynamics parameters. The results of utilization of municipal sludge and sludge incinerator operating conditions adjustment accumulated basis of experimental data. Research on the circulating fluidized bed combustion apparatus in the small thermal state the different conditions semidry test the combustion characteristics of the sludge, to test the emission of pollutants in the flue gas generated in the incineration process secondary Semi through different working conditions the test sludge drying in a fluidized bed incinerator pilot study, understanding and knowledge of the fluidized bed semi-dry sludge incinerator operation and pollutant emission characteristics. To build a large-scale circulating fluidized bed sludge incineration thermal state test device, and gave details of the structure and systems of the test device. It was found that: the test bench device meet the design requirements. Completed on the basis of semi-dry sludge combustion mechanism, 300t / d sludge circulating fluidized bed incinerator design and check calculations, the overall structure of the incinerator. Semi-dry sludge in a fluidized bed combustion characteristics and Pollutant Emission Characteristics Experimental Study for the development of semi-dry sludge fluidized bed incineration technology to establish the basis of practice, but also for future in-depth The study provides valuable reference data.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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