CFD simulation of confined non-premixed jet flames in rotary kilns for gaseous fuels

Elattar, H.F.; Stanev, Rayko; Specht, Eckehard; Fouda, A.

doi:10.1016/j.compfluid.2014.05.033

Cited by 30 publications

(10 citation statements)

References 14 publications

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“…This result is similar with the study as reported by [13][14]. The highest temperature was about of 1910 0 K. The temperature was decreased about of 100 0 K for increasing of the excess air from 0% until 50 %.…”

Section: Temperature Distributionsupporting

confidence: 92%

Combustion of producer gas from gasification of south Sumatera lignite coal using CFD simulation

Vidian

Novia

Andy³

2017

MATEC Web Conf.

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Abstract.The production of gasses from lignite coal gasification is one of alternative fuel for the boiler or gas turbine. The prediction of temperature distribution inside the burner is important for the application and optimization of the producer gas. This research aims to provide the information about the influence of excess air on the temperature distribution and combustion product in the non-premixed burner. The process was carried out using producer gas from lignite coal gasification of BA 59 was produced by the updraft gasifier which is located on Energy Conversion Laboratory Mechanical Engineering Department Universitas Sriwijaya. The excess air used in the combustion process were respectively 10%, 30% and 50%. CFD Simulations was performed in this work using two-dimensional model of the burner. The result of the simulation showed an increase of excess air, a reduction in the gas burner temperature and the composition of gas (carbon dioxide, nitric oxide and water vapor).

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Section: Temperature Distributionsupporting

confidence: 92%

Combustion of producer gas from gasification of south Sumatera lignite coal using CFD simulation

Vidian

Novia

Andy³

2017

MATEC Web Conf.

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“…Heat transfer from the flame is considered to be one of the most important factors among the four aspects because it has an important influence on the performance of the rotary kiln. A large cylinder with a diameter of 2.6 m and a length of 20 m was proposed by Elattar et al [32]. The influence of the geometric shape on the kiln body and that of the various operating parameters on flame heat distribution and flow display were studied.…”

Section: Experimental and Simulation Data Comparisonmentioning

confidence: 99%

“…On the basis of Saeman model, the kinetic model was established to simulate the waste characteristics in a rotary kiln, and the furnace height, residence time, and structure were well predicted. The influence of the geometric shape and various operating parameters on the thermal distribution and flow field of the flame was studied by Elattar et al [32]. Based on the previous two-dimensional free jet flame model, a turbulence model was used to simulate the flame.…”

Section: Experimental and Simulation Data Comparisonmentioning

confidence: 99%

“…Comparison of simulated and experimental data of the centerline axial temperature versus mixture fraction with and without radiation modeling using a methane flame[32] Comparison of simulated and experimental data of the centerline axial mass fraction distribution for CO and H 2 species versus mixture fraction using a methane flame[32] Elattar et al obtained the following conclusions. The realizable k − ε turbulence model was selected as the most suitable for the simulation of a non-premixed jet flame in a rotary kiln.…”

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confidence: 98%

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Hazardous waste incineration in a rotary kiln: a review

Jiang

Yan

2019

Waste Dispos. Sustain. Energy

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Hazardous waste output in the world is increasing every year. To achieve higher efficiency and lower pollution, the incineration technology for hazardous waste needs to be studied further. This study mainly reviews the research progress in incineration, slagging, and pollutant emission in the rotary kiln in China and abroad in the last 10 years, and conducts a comprehensive analysis and evaluation of the research. Considering that there are many variables involved in the incineration process, the incineration law cannot be validated in a limited timeframe by experiments. Researchers often use computer simulations to predict and verify the incineration process through experiments and to provide reference opinions for commercial operations. Through the analysis of the research progress in rotary kilns, it is observed that the basic research in rotary kilns is becoming mature. The latest research trend in rotary kilns is interdisciplinary and mixed research. From a new perspective, further research should be focused on a comparative analysis of the rotary kiln and the cement kiln, full life cycle assessment of the impact factors of rotary kiln on the environment, the impact of the factory treatment process on the workers' health, etc. The research direction of rotary kiln in China and abroad for the future has been predicted reasonably.

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“…With the amount of excess air gradually increasing, the high‐temperature combustion zone gradually moves toward the back‐end of the kiln, and the combustion zone becomes larger. Meanwhile the average temperature of the flame and flue gas also decreases since the mixing temperature between fuel and air decreases with an increase in the excess air coefficient . When the excess air coefficient exceeds 1.1, as shown in Figure d and e, the coal powders combustion becomes slow and the flame elongates.…”

Section: Simulation Results and Discussionmentioning

confidence: 91%

Experimental research and numerical analysis on thermal dynamic characteristics of rotary kiln

Wang

Cheng

2019

Can J Chem Eng

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The rotary kiln is a piece of equipment that consumes an extensive amount of energy. The thermal dynamic characteristics of the rotary kiln include conduction, convection, radiation, and combustion characteristics, which are closely bound up with the energy consumption of the kiln. In this paper, both experimental and numerical studies are performed to understand the relationship between the thermal dynamic characteristics of the rotary kiln and the factors that affect them. In the experimental section, the shell temperature and coating thickness of the kiln cylinder were measured, which shows the thermal dynamic characteristics of the rotary kiln. In the numerical section, a three-dimensional numerical model with ANSYS software is set up to research the fluid flow, combustion, and heat transfer characteristics of the rotary kiln under different working conditions. The numerical simulation results presented reasonable agreement with the experimental data. The results indicate that coating thickness affects the heat transfer conduction of the kiln and the burner structure affects the combustion and convection heat transfer in a kiln. Fugitive constituents of coal, pulverized coal concentration, excess air ratio, and oxygen content can influence the characteristics of the combustion and heat transfer processes.

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CFD simulation of confined non-premixed jet flames in rotary kilns for gaseous fuels

Cited by 30 publications

References 14 publications

Combustion of producer gas from gasification of south Sumatera lignite coal using CFD simulation

Combustion of producer gas from gasification of south Sumatera lignite coal using CFD simulation

Hazardous waste incineration in a rotary kiln: a review

Experimental research and numerical analysis on thermal dynamic characteristics of rotary kiln

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