Influence of variation in the operating conditions on PCDD/F distribution in a full-scale MSW incinerator

Zhang, Haijun; Ni, Yuwen; Chen, Jiping; Zhang, Qing

doi:10.1016/j.chemosphere.2007.06.054

Cited by 46 publications

(12 citation statements)

References 34 publications

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“…PCDDs/Fs formation depends on O 2 level [17], and O 2 is an essential parameter controlling the de novo synthesis of PCDDs/Fs [7,18]. PCDDs/Fs formation increases with O 2 concentration between 0% and 10% [19], and a maximum formation was found at O 2 ≥ 5% [18].…”

Section: Pcdds/fs In Flue Gas Before Apcdmentioning

confidence: 98%

Effect of MSW source-classified collection on the emission of PCDDs/Fs and heavy metals from incineration in China

Shi

et al. 2008

Journal of Hazardous Materials

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Section: Pcdds/fs In Flue Gas Before Apcdmentioning

confidence: 98%

Effect of MSW source-classified collection on the emission of PCDDs/Fs and heavy metals from incineration in China

Shi

et al. 2008

Journal of Hazardous Materials

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“…A previous study reported the effect of oxygen on the formation of PCDD/F, including three aspects [ 28 ]: (1) promoting the formation of C-Cl bonds; (2) promoting the carbon-oxygen complexes by reducing the activation energy; (3) providing highly active chlorine in the Deacon reaction. In addition, the higher oxygen level was conducive to PCDD/F formation in laboratory-scale and full-scale incinerators [ 29 , 30 ]. As for temperature and pressure, the reaction rate and activation energy are decided by the two parameters if the reaction is fixed based on the Arrhenius equation.…”

Section: Resultsmentioning

confidence: 99%

Stable and Effective Online Monitoring and Feedback Control of PCDD/F during Municipal Waste Incineration

et al. 2021

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For the long-term operation of municipal solid waste incineration (MSWI), online monitoring and feedback control of polychlorinated dibenzo-p-dioxin and dibenzofuran (PCDD/F) can be used to control the emissions to national or regional standards. In this study, 500 PCDD/F samples were determined by thermal desorption gas chromatography coupled to tunable-laser ionization time-of-flight mass spectrometry (TD-GC-TLI-TOFMS) for 168 h. PCDD/F emissions range from 0.01 ng I-TEQ/Nm3 to 2.37 ng I-TEQ/Nm3, with 44% of values below 0.1 ng I-TEQ/Nm3 (the national standard). In addition, the temperature of the furnace outlet, bed pressure, and oxygen content are considered as key operating parameters among the 13 operating parameters comprising four temperature parameters, four pressure parameters, four flow parameters, and oxygen content. More specifically, maintaining the furnace outlet temperature to be higher than 800 °C, or bed pressure higher than 13 kPa, or the oxygen content stably and above 10% are effective methods for reducing PCDD/F emissions. According to the analysis of the Pearson coefficients and maximal information coefficients, there is no significant correlation between operating parameters and PCDD/F I-TEQ. Only when there is a significant change in one of these factors will the PCDD/F emissions also change accordingly. The feedback control of PCDD/F emissions is realized by adjusting the furnace outlet temperature, bed temperature, and bed pressure to control the PCDD/F to be less than 0.1 ng I-TEQ/Nm3.

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“…Descriptions of the typical full-scale FBI and GFI in operation in China can be seen elsewhere (Yan et al, 2006;Zhang et al, 2008). The existing GFI plants are fairly similar in system configuration; there are only differences in some details such as incineration capacity, structure of grate bar and furnace, flue gas scrubbing facilities and disposal of leachate from the bunker.…”

Section: Materials and Energy Flow Of The Two Incineration Technologiesmentioning

confidence: 99%

Life-cycle assessment (EASEWASTE) of two municipal solid waste incineration technologies in China

2010

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The environmental profile of two municipal solid waste incineration (MSWI) technologies with semi-dry flue gas cleaning, namely grated firing incinerators (GFI) and fluidised bed incinerators (FBI) that are commonly used in China were evaluated and compared by life-cycle assessment (LCA) using the EASEWASTE model. All emissions of key pollutants as well as energy, resource and material inputs and outputs associated with the two MSWI technologies were determined and the corresponding environmental impact potentials were modelled. Incineration of MSW with a lower heating value (LHV) around 4.5 MJ kg(-1) demands that auxiliary fuel is used, and both GFI and FBI caused environmental loads by contributing with environmental impact potentials in most categories except for some saving in global warming (GW100) and hazardous waste (HW). Coal combustion in FBI is a main contributor to the environmental impact potentials and thus should always be limited to a minimum. Auxiliary fuels can be avoided when the LHV of MSW is higher than 5-6 MJ kg(- 1). For all scenarios, GFI saves more global warming potentials than FBI due to its higher net power generation from combustion of MSW itself. Leachate from the bunker could be sprayed into the furnace for evaporation under high temperature, as an alternative to waste-water treatment, without major changes in the environmental profile of the incinerator. The presented evaluations may contribute to a more balanced environmental assessment of the two incineration technologies with respect to incineration of MSW with low heating values as often found in Asia and China.

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Influence of variation in the operating conditions on PCDD/F distribution in a full-scale MSW incinerator

Cited by 46 publications

References 34 publications

Effect of MSW source-classified collection on the emission of PCDDs/Fs and heavy metals from incineration in China

Effect of MSW source-classified collection on the emission of PCDDs/Fs and heavy metals from incineration in China

Stable and Effective Online Monitoring and Feedback Control of PCDD/F during Municipal Waste Incineration

Life-cycle assessment (EASEWASTE) of two municipal solid waste incineration technologies in China

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