Dynamic modeling of waste incineration plants with rotary kilns

Rovaglio, M.; Manca, Davide; Biardi, G.

doi:10.1016/s0009-2509(98)00081-5

Cited by 26 publications

(26 citation statements)

References 6 publications

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“…Besides inlet air contains a large amount of nitrogen. All of the results represented in this section until here are in agreement with those of Rovaglio et al (1998) for the incineration of conventional solid waste. In Fig.…”

Section: Mass Variation Of Gas Componentssupporting

confidence: 82%

“…The resultant combustion products go to a cyclone postcombustion chamber which allows the total combustion and destruction of contaminants be completed. At the end of the plant hot section two spiral heat exchangers are used to preheat the incoming combustion air (Rovaglio et al, 1998). The volatilized combustible products exit through the kiln and enter the secondary chamber where additional oxygen is made available and ignitable liquid wastes or fuel can be introduced to achieve the desired operating temperature.…”

Section: Incineratormentioning

confidence: 99%

“…Some different factors such as residence time, additional oxygen and proper temperature are effective on process efficiency (Rovaglio et al, 1998).…”

Section: Transient Mass Transfer Modeling and Simulation Of Pbdesmentioning

confidence: 99%

“…6: By assuming complete waste destruction at steady state condition, solid phase balance is simplified as Eq. 7 (Rovaglio et al, 1998): Then, R dr and A follow from Eqs. 8 and 9: …”

Section: Solid Waste Mass Balancementioning

confidence: 99%

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Transient mass transfer modeling and simulation of polybrominated diphenyl ethers combustion in incinerators

Mousavi

Taymouri

Ghaffarian

2009

Int. J. Environ. Sci. Technol.

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ABSTRACT:In this paper, modeling and simulation of combustion process for polybrominated diphenyl ethers in rotary kilns has been investigated. Proper formula is found for the solid wastes which contain polybrominated diphenyl ethers and then combustion process is simulated by considering possible reactions, appropriate dimensions and operating conditions for rotary kiln and necessary relations for reaction rates. The software of MATLAB is used for the simulation. The mass variations for solid waste, outlet gas and its components are calculated during 20 h. The results show that the reaction rate is high for the first 2 h, thus the value of solid waste and oxygen decrease quickly while value of produced gases increases. The mass increase of polychlorinated dibenzo-p-dioxins/furans and polybrominated dibenzo-p-dioxins/furans during the whole time of the process is linear with mild slope but for the other compounds, including steam, carbon dioxide, nitrogen, nitrogen oxide, sulphur dioxide, hydrogen chloride and hydrogen bromine, the slope of variations becomes mild after 3 h. The process becomes steady state almost after 9 h.

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Section: Mass Variation Of Gas Componentssupporting

confidence: 82%

Section: Incineratormentioning

confidence: 99%

“…Some different factors such as residence time, additional oxygen and proper temperature are effective on process efficiency (Rovaglio et al, 1998).…”

Section: Transient Mass Transfer Modeling and Simulation Of Pbdesmentioning

confidence: 99%

“…6: By assuming complete waste destruction at steady state condition, solid phase balance is simplified as Eq. 7 (Rovaglio et al, 1998): Then, R dr and A follow from Eqs. 8 and 9: …”

Section: Solid Waste Mass Balancementioning

confidence: 99%

See 2 more Smart Citations

Transient mass transfer modeling and simulation of polybrominated diphenyl ethers combustion in incinerators

Mousavi

Taymouri

Ghaffarian

2009

Int. J. Environ. Sci. Technol.

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“…In addition, some elements can be described as incombustible fractions and water content (moisture). Within the dry solid, it is necessary to distinguish between a combustible and burning fraction [13,14]. This gives rise to gas products.…”

Section: Theoretical Approachmentioning

confidence: 99%

Analysis of Polychlorinated Biphenyl Wastes Incineration in Rotary Kilns: Model Development and Validation

Bani-Hani

Hammad²,

Matar³

et al. 2015

Int J Mech Syst Eng

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Polychlorinated Biphenyls (PCBs) are among hazardous wastes that must be incinerated for environmental and health protection. A dynamic model is introduced for the incineration of Polychlorinated Biphenyls (PCBs) in a rotary kiln. The model accounts for variations in composition and process conditions. The effects of excess air and the number of chlorine atoms in the structure of the PCBs are included in the incineration process. A MATLAB code was developed to solve the set of stiff nonlinear equations of PCBs incineration. The proposed incineration model was found to be in good agreement with the experimental data reported in the literature under ordinary feeding conditions for chlorinated compounds. Analysis of Polychlorinated Biphenyl Wastes Incineration in Rotary Kilns

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Study of Parameters Influencing Fluid Flow and Wall Hot Spots in Rotary Kilns using CFD

et al. 2016

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In this paper, 3-D-CFD simulation using an ANSYS-Fluent package in a 4 m diameter kiln with 40 m length firing methane (CH 4 ) gas is applied to avoid undesirable thermal behaviour (wall hot spots; peak wall temperatures) in industrial rotary kilns. New influencing parameters are introduced, including primary air ratio, burner configuration (two configurations with different fuel jet momentums), and burner power. The influence of these parameters on the peak kiln flame and on wall temperatures, flame radiation heat flux, radiative heat transfer coefficient, temperature contours, and pathlines are investigated and discussed. Preliminary comparison of jet flames with available experimental data is carried out to select and validate the proper turbulence model for the present simulations. Results reveal that the peak flame temperature, flame radiation heat flux, and radiative heat transfer coefficient increase with higher fuel jet momentum, lower primary air ratio, and higher burner power. On the other hand, the wall hot spots emerge when operating the kiln at higher burner power or by lowering the jet momentum (larger fuel inlet diameter). Stable flames and a higher recirculation size can be obtained by operating the kiln under a higher primary air ratio and higher jet momentum (narrower fuel inlet diameter). Based on these results, operators are shown a way to adjust controllable kiln parameters to reduce wall hot spots and to improve product quality, in addition to controlling the ringing problems.

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Dynamic modeling of waste incineration plants with rotary kilns

Cited by 26 publications

References 6 publications

Transient mass transfer modeling and simulation of polybrominated diphenyl ethers combustion in incinerators

Transient mass transfer modeling and simulation of polybrominated diphenyl ethers combustion in incinerators

Analysis of Polychlorinated Biphenyl Wastes Incineration in Rotary Kilns: Model Development and Validation

Study of Parameters Influencing Fluid Flow and Wall Hot Spots in Rotary Kilns using CFD

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