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Species Transformation of Trace Elements and Their Distribution Prediction in Dyestuff Residue Incineration

Chinese Journal of Chemical Engineering 2007年第2期15卷 268-275页

作者：谭中欣李海滨王小亮蒋旭光严建华 Guangzhou Institute of Energy Conversion Chinese Academy of Sciences State Key Laboratory of Clean Energy Institute for Thermal Power Engineering Zhejiang University

The release of heavy metals from the combustion of hazardous wastes is an environmental issue of in-creasing *** species transformation characteristics of toxic heavy metals and their distribution are consid-ered to be a complex problem of *** behavior of hazardous dyestuff residue is investigated in a tubular furnace under the general condition of hazardous waste pyrolysis and *** interpretation has been aided by parallel theoretical study based on a thermodynamic equilibrium model based on the principle of Gibbs free en-ergy *** results show that Ni,Zn,Mn,and Cr are more enriched in dyestuff residue incineration than other heavy metals(Hg,As,and Se)subjected to *** thermodynamic model calculation is used for explaining the experiment data at 800℃ and analyzing species transformation of heavy *** results of species transformation are used to predict the distribution and emission characteristics of trace *** most trace element predictions are validated by the measurements,cautions are in order due to the complexity of incineration systems.

关键词： hazardous waste incineration thermodynamic equilibrium model heavy metals species transformation prediction

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Behavior and control of chlorine in dyestuff residue incineration

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Journal of Environmental Sciences 2006年第3期18卷 577-582页

作者： YAN Jian-hua TAN Zhong-xin JIANG Xue-guang CHI Yong CEN Ke-fa State key Laboratory of Clean Energy Institute for Thermal Power Engineering Zhejiang University Hangzhou 310027 China

Dyestuffresidue, a type of hazardous waste, is incinerated in the tubular furnace, and thermodynamic equilibrium model is used to calculate and analyze the chlorine behavior. The HCI emission and its effects on the behaviors of heavy metals are studied. Meanwhile, the effects of three dechlorine reagents are predicted at a high temperature. Results show that HCI emission is dependent on incineration temperature. The HCl evaporated mainly derives from the organic chlorine. Under the working condition of 500-- 900℃, the main products of rig, Pb, Cu, Ni, Zn, and Mn in reaction with HCl are HgCl2 （g）, PbCl4（g）, PbCI2 （g）, （CuCl）3 （g）, NiCl2 （s）, NiCl2 （g）, ZnCl2 （s）, ZnCl2 （g）, Zn （g）, MnCl2 （s）, and MnCl2 （g）, respectively. Among the three dechlorine reagents, CaCO3 is optimal to remove chlorine at high temperature, little of HCl is released below 800℃, whereas Fe3O4 is unstable at high temperature.

关键词： hazardous waste thermodynamic equilibrium model HCl heavy metals dechlorine reagents

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INVESTIGATIONS OF MAIN FACTORS AFFECTING TROPOSPHERIC NITRATE AEROSOL USING A COUPLING model

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China Particuology 2006年第6期4卷 336-341页

作者： Tijian Wang Shu Li Fei Jiang Lijie Gao Department of Atmospheric Science Nanjing University Nanjing 210093 China State Key Laboratory of Soil and Agriculture Sustainable Development Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Science Chinese Academy of Sciences Beijing 100029 China

Factors affecting tropospheric nitrate aerosol formation were investigated through a number of sensitivity studies using the thermodynamic equilibrium model ISORROPIA and the condensed gas-phase chemistry model. Results indicate that the equilibrium concentration of nitrate aerosol varies with solar zenith angle, air temperature, relative humidity, initial SO2 concentration, initial NO2 concentration and initial NH3 concentration. NH3 concentration and solar zenith angle play the most important roles, followed by relative humidity and NO2 concentration. It seems that the relations between nitrate aerosol and these four factors, as well as air temperature, are strong and highly nonlinear due to the coupling effect. The influence of SO2 concentration on nitrate aerosol is near-linear and weak.

关键词： nitrate aerosol troposphere thermodynamic equilibrium model

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