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Study of Effect of Reaction Conditions on Devolatilization of Coal by TG-FTIR

Author: HeJiaJia
Tutor: WuShaoHua；QiuPengHua
School: Harbin Institute of Technology
Course: Thermal Power Engineering
Keywords: Coal Pyrolysis Kinetic parameters TG-FTIR Reducing atmosphere
CLC: TQ533.6
Type: Master's thesis
Year: 2007
Downloads: 176
Quote: 1
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Abstract


Emissions from coal burning power plant boiler flue gas is a major source of atmospheric pollutants NOx . At present, China's NOx pollution is getting worse this end, the development of power station coal-fired boiler NOx control technology is imperative . Currently , NOx control technology methods more but in our country , due to the limitations of their own conditions , only a few techniques more practical . Reburning technology as a furnace low - NOx combustion technology is a relatively cost- effective NOx control technology , feasibility , easy to promote . China 's abundant coal resources , coal reburning effectiveness of pulverized coal reburn fuel to become the first choice for utility boilers in China . The kinetic parameters of coal pyrolysis and combustion characteristics of a direct impact on the parameter setting of the power plant boiler reburning technology , the pyrolysis of coal in a reducing atmosphere , the combustion characteristics of reburning technology applications with direct guidance . Of four typical power coal in thermobalance pyrolysis under a nitrogen atmosphere with different heating rates (20,35,50,75,100 ℃ / min) , the other is still analog furnace reburning zone reduction atmosphere under a heating rate of 50 ℃ / min reaction . Generated by the reaction gas into the Fourier transform infrared spectrometer for detection . The experimental method is the heat - infrared spectrometry (TG-FTIR) technology . TG-FTIR, can clearly show the relationship of weightlessness , the temperature dependence of coal and coal reaction gas composition and temperature . This article was obtained by the analysis of the pyrolysis loss curve each coal sample more comprehensive pyrolysis characteristic parameters obtained by the kinetic analysis of the coal sample pyrolysis reaction mechanism functions and kinetic parameters , the data collected by infrared spectroscopy to obtain the coal reaction gas sample at different temperatures of the various gas components . Pyrolysis under reducing atmosphere , the reaction characteristics of the coal sample analysis further revealed the reaction mechanism of the reburning technology , the reburning technology design and transformation of power plant boiler design parameters determined to provide a theoretical basis for the reburning technology further promote the application to provide technical support .

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CLC: > Industrial Technology > Chemical Industry > Processing and utilization of coal chemical and coal > Analysis and testing of the coal > Spectroscopy, mass spectrometry analysis
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