Influence of multi-temperature primary air on the characteristics of MSW combustion in a moving grate incinerator

Yan, Mi; Tian, Xinyi; Antoni, Antoni; Yu, Caimeng; Zhou, Zhihao; Hantoko, Dwi; Kanchanatip, Ekkachai; Khan, Muhammad Sajid

doi:10.1016/j.jece.2021.106690

Cited by 17 publications

(6 citation statements)

References 45 publications

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“…Attaining specific temperatures highly depended on the turbulence created within the incinerator [18,19]. The turbulence patterns of the combustion chamber were studied using the k-epsilon turbulence model, and the results are presented in Figures 2.…”

Section: Static Temperature and Turbulence Intensitymentioning

confidence: 99%

Sustainable Energy from Waste: A Feasibility Study in Miri, Malaysia

Chua,

Hashim,

Downmore

et al. 2023

Ind. Domest. Waste Manag.

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The growth of urban populations, industrialization, and economic development has led to a surge in solid waste production. When local recycling infrastructure falls short, much of this waste ends up in landfills, causing environmental and social challenges. This study aims to assess the feasibility of converting municipal solid waste (MSW) into energy, with a focus on combustion chamber modeling in Miri, Sarawak. Data on MSW composition are obtained from secondary sources. Ansys Fluent software is used to model the combustion chamber, and simulations are conducted to explore temperature, turbulence, and species distribution. MSW composition illustrates higher substantial fractions, with 39.8% being food waste, followed by 20.7% plastic/rubber. Calorific values range from 4652 kJ/kg for food waste to 32564 kJ/kg for plastic/rubber. Combustion simulations result in maximum flue gas temperatures of 1500 °C, 1200 °C, and 1800 °C under varying air inlet conditions. Turbulence intensities on the grate range from 125% to 174% for these air inlet configurations. The study concludes that moisture content significantly affects calorific value and heat generation during combustion. Higher turbulence intensities lead to increased reaction rates and heat generation, improving the energy efficiency of the process.

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Section: Static Temperature and Turbulence Intensitymentioning

confidence: 99%

Sustainable Energy from Waste: A Feasibility Study in Miri, Malaysia

Chua,

Hashim,

Downmore

et al. 2023

Ind. Domest. Waste Manag.

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“…Their results showed that changing the garbage components without changing the operational conditions led to an uneven temperature distribution, and adjusting the air distribution helped in improving the thermal efficiency of the boiler. Yan et al 9 studied the effect of different primary air temperatures on the combustion characteristics of an incinerator through numerical simulations, and the results showed that as the primary air temperature increased, the rate of water evaporation and volatilization increased. However, the rate of volatilization was very high, which led to the localization of the incinerator, and a high temperature was detected inside the incinerator.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on Combustion of Low Calorific Value Waste Blended with Biomass

Huang,

Gong,

Peng

et al. 2024

ACS Omega

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Numerical simulations of a 600 t/day waste incinerator was carried out using the fluid dynamic incinerator code and Fluent to evaluate the effect of biomass blending on furnace temperature, pollutant generation, and selective noncatalytic− reduction (SNCR) denitrification when treating low calorific−value waste. The results show that as the biomass blending ratio increases, the water content gradually decreases, the calorific value increases, and the maximum temperature of the incinerator gradually increases from 1227 to 1408 K, while the content of exported NO x increases from 579 to 793 mg/Nm 3 ; during the combustion of low-quality waste, the residence time of the flue gas in the high-temperature region (above 1123 K) is 1.62 s. When the biomass blending ratio exceeds 20%, the residence time of the flue gas in the hightemperature region is more than 2 s, which can effectively curb the generation of dioxin. When the biomass blending ratio is 20%, and the normalized stoichiometric ratio (2n urea /n NO ) of urea injected into the SNCR is 1.1, the NO x concentration at the outlet is 230.08 mg/Nm 3 , which satisfies the NO x emission standard of less than 250 mg/Nm 3 .

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“…MSW incineration (MSWI) is an effective solution for environmental issues because of its high capacity reduction rate, fast processing speed [4]. The grate-type incinerator is widely used due to its reliable technology, large capacity, strong adaptability, convenient operation, and easy maintenance [5]. Adjusting the parameters to improve control can be inconvenient in practice due to equipment safety and pollution emission [6].…”

Section: Introductionmentioning

confidence: 99%

“…(4) The appropriate wall particle collision mode and the length of the second baffle were studied to improve the trapping effect in the particle diffusion process. (5) The PM capture technology has been improved, and the MSWI particulate matter simulation experience has been accumulated, which has promoted the sustainable development of domestic waste incineration technology. The MSW is poured into the feed hopper and pushed into the grate furnace with the feeder carried by the movement of the grate.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Numerical Modeling and Analysis for the Municipal Solid-Waste Incineration of the Grate Furnace for Particulate-Matter Generation

Tang

Xia

et al. 2023

Sustainability

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A 3D numerical model of the municipal solid waste incineration (MSWI) process was constructed based on a grate furnace with a daily processing capacity of 800 tons. Fluent was used for analyzing key factors affecting the concentration and diffusion level of particulate matter (PM). According to the actual MSWI plant working condition, a 3D model of the incinerator and the waste heat boiler has been constructed under benchmarks. Key factors affecting PM generation were determined by combining mechanistic knowledge and experts’ experience. They were the combustion temperature of solid phase municipal solid waste (MSW), the wall’s PM collision mode, and the second baffle length. Subsequently, the process of resolving the 3D numerical model was delineated. Then, a univariate analysis of the aforementioned 3D model was conducted for the three pivotal factors mentioned above. Conclusively, the effect of the important factors on the number of particles at the outflow of the incinerator was analyzed via orthogonal experiments to obtain the optimal combination. PM concentration initially diminished and then rose with the increased combustion temperature of the solid-phase MSW. Furthermore, a noteworthy reduction in PM concentration was observed when the second baffle length was 12.45–12.95 m. The greatest influence on the PM concentration of the outlet was posed by the wall’s PM collision mode, followed by the second baffle length. The appropriate adjustment of the combustion temperature of the solid-phase MSW, selection of wall materials, and design of the second baffle length were beneficial for diminishing PM concentration and ensuring long-term stable operation of the MSWI process. The combinative optimality of the three key factors was acquired via orthogonal experiments, which proved the subsequent optimal control of PM concentration at the outlet.

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Influence of multi-temperature primary air on the characteristics of MSW combustion in a moving grate incinerator

Cited by 17 publications

References 45 publications

Sustainable Energy from Waste: A Feasibility Study in Miri, Malaysia

Sustainable Energy from Waste: A Feasibility Study in Miri, Malaysia

Numerical Simulation Study on Combustion of Low Calorific Value Waste Blended with Biomass

Three-Dimensional Numerical Modeling and Analysis for the Municipal Solid-Waste Incineration of the Grate Furnace for Particulate-Matter Generation

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